# Full Documentation for OPTOStokes Filters > Generated: 2025-12-26 21:30:01 > Official Site: https://www.optofilters.com --- # Section: Products ## LP920 920nm Longpass Filter | Ultra-Thin 0.55mm for Compact NIR Systems **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/246.html **Summary**: High-performance LP920 920nm longpass filter by OPTOStokes. T > 90% at 920-1100nm, ultra-thin 0.55mm design. Ideal for compact NIR sensors and laser detection. > **Detail Content:** The OPTOStokes LP920 is a high-performance 920nm longpass filter specifically engineered for applications where space and weight are critical constraints. This ultra-thin filter provides a sharp spectral transition, effectively blocking shorter wavelengths up to 900nm while maintaining over 90% transmission in the Near-Infrared (NIR) spectrum. Its precision thin-film construction makes it an ideal IR window for advanced sensing modules. ### Technical Specifications | Technical Parameter | Value | | | Product Identification | SKU: 21105548 | | | Transmission Range | 920nm to 1100nm @ T > 90% | | | Blocking Range | 350nm to 900nm @ T < 1% | | | Physical Thickness | 0.55mm filter profile | | | Surface Quality | 60/40 Scratch-Dig | | | Filter Type | longpass filter (NIR Edge) | | ### Typical Applications The LP920's ultra-thin form factor and precise spectral control make it a preferred choice for: Compact NIR Sensors: Integration into mobile devices, drones, and handheld spectrometers. LiDAR & 3D Imaging: Improving signal integrity by filtering out ambient sunlight and secondary light sources. Laser Signal Cleanup: Passing 940nm or 1064nm signals while suppressing shorter wavelength noise. Biometric Recognition: Enhancing the contrast of IR-based facial and iris scanning in compact systems. ### Customization & Manufacturing Reliability OPTOStokes delivers world-class precision with every component. We support highly customized requirements, including non-standard shapes, custom AOI (Angle of Incidence) adjustments, and specific mounting solutions. With our extensive in-stock selection, we ensure that your project moves from prototype to production with reliable lead times and guaranteed quality. Our high transmission coatings are designed to withstand demanding environments without spectral shifting. ### Technical Support & Inquiry Are you facing signal interference or mechanical space limitations in your optical design? Our committee of experts is ready to provide technical guidance and volume quotes. For more information, please contact our sales engineers at sales@optofilters.com or request a technical datasheet through our website. --- ## LP910 910nm Longpass Filter | Precision NIR Edge Filter, 1.1mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/245.html **Summary**: High-performance LP910 910nm longpass filter by OPTOStokes. T > 90% at 910-1100nm, blocking 350-880nm at T < 1%. Ideal for 940nm laser & NIR sensing. > **Detail Content:** ![Image: 910nm NIR filter imaging](https://www.optofilters.com/uploads/allimg/20251219/1-2512191Z951342.webp) The OPTOStokes LP910 is a high-precision 910nm longpass filter engineered for advanced Near-Infrared (NIR) systems. This longpass filter features a sharp transition edge, providing superior suppression of visible light and shorter NIR wavelengths (350-880nm) while maintaining exceptional throughput (T > 90%) for signals above 910nm. It is a critical component for achieving a high high SNR in demanding optical environments. ### Technical Specifications | Parameter | Value | | | Product Identification | SKU: 21103046 | | | Transmission Range | 910nm to 1100nm @ T > 90% | | | Blocking Performance | 350nm to 880nm @ T < 1% | | | Physical Thickness | 1.1mm ± 0.1mm | | | Surface Quality | 60/40 Scratch-Dig | | | Substrate Material | Optical Glass with Hard Coating | | ### Key Applications The LP910's unique cutoff profile makes it indispensable for applications involving high-power NIR sources and sensitive detectors: 940nm Laser Systems: Used as a 940nm laser cleanup filter to remove unwanted spectral noise. NIR Fluorescence Imaging: Isolating long-wavelength emissions in NIR fluorescence microscopy and diagnostics. Industrial Sorting: Enhancing contrast in machine vision systems by blocking the visible spectrum. LiDAR & Remote Sensing: Protecting IR detectors from ambient sunlight interference below 880nm. ### Customization & Manufacturing Excellence OPTOStokes provides more than just standard components. We support high-level customization for various shapes (circular, rectangular, or complex geometries) and offer specialized mounting options to fit your system. Our high precision coating technology ensures world-class durability and spectral stability. We maintain an extensive in-stock selection to ensure reliable lead times for your R&D and production needs. ### Contact Our Technical Team If you have specific requirements for spectral steepness, optical density (OD), or thermal stability, our engineering committee is ready to provide expert guidance. For volume pricing or custom 910nm solutions, please reach out to sales@optofilters.com or use our online inquiry system. --- ## LP840 840nm Longpass Filter | Ultra-Thin 0.55mm for NIR Imaging **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/244.html **Summary**: Shop OPTOStokes LP840 840nm longpass filters. Featuring 0.55mm ultra-thin profile, T > 90% at 840-1100nm. High-precision cutoff for NIR sensors & compact imaging. > **Detail Content:** ![Image: ultra-thin,840nm filter](https://www.optofilters.com/uploads/allimg/20251219/1-2512191ZP6327.webp) The OPTOStokes LP840 is a high-performance 840nm longpass filter engineered with an ultra-thin 0.55mm profile. Designed for integration into compact systems, this filter provides a sharp spectral transition, effectively blocking visible light interference while maintaining exceptional throughput in the near-infrared region. It is the ideal solution for high-density optical assemblies where space and precision are paramount. ### Technical Specifications | Technical Parameter | Specifications | | | Product Identification | SKU: 21105035 | | | Transmission Range | 840nm to 1100nm @ T > 90% | | | Blocking Performance | 350nm to 800nm @ T < 1% | | | Physical Thickness | 0.55mm filter profile | | | Surface Quality | 60/40 Scratch-Dig | | | Filter Type | longpass filter (Edge Filter) | | ### Primary Applications Our LP840 series is widely adopted by R&D engineers for various advanced imaging technologies: 3D Sensing & LiDAR: Filtering out solar background noise to enhance signal detection at 850nm. Compact NIR Sensors: Perfect for mobile devices and wearable tech due to its ultra-thin form factor. Machine Vision: Optimizing contrast in industrial inspection systems by isolating near-infrared wavelengths. Security & Surveillance: Enhancing nocturnal image clarity in infrared-illuminated environments. ### Customization & Engineering Support At OPTOStokes, we bridge the gap between world-class quality and rapid deployment. Beyond our extensive in-stock selection, we offer OEM customization for specific dimensions, customized mounting rings, and specialized coatings. Whether you require a circular, rectangular, or custom-shaped anti-reflective filter, our team ensures reliable lead times and guaranteed performance. ### Technical Inquiry & Procurement Facing challenges with spectral crosstalk or space constraints in your optical path? Our engineers are ready to assist with technical selection and volume pricing. Please contact us at sales@optofilters.com for a formal quote or to discuss your specific customization requirements. --- ## LP800 800nm Longpass Filter | High NIR Transmission, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/243.html **Summary**: High-performance LP800 800nm longpass filter by OPTOStokes. T > 90% at 825-1100nm, precision blocking below 780nm. In-stock & custom options for NIR imaging. > **Detail Content:** The OPTOStokes LP800 series is a high-performance 800nm longpass filter designed to effectively isolate the near-infrared spectrum by providing a sharp transition from deep blocking to high transparency. This longpass filter is engineered for precision systems requiring a clean optical cutoff filter to eliminate visible light interference and enhance signal-to-noise ratios in NIR applications. ### Technical Specifications | Parameter | Value | | | Product Code | 21102165 | | | Transmission Range | 825nm to 1100nm @ T > 90% | | | Blocking Range | 350nm to 780nm @ T < 1% | | | Thickness | 1.0mm thickness | | | Surface Quality | 60/40 Scratch-Dig | | | Coating Technology | Hard Coating / Sputtering | | ### Applications Due to its high transmission and reliable cutoff characteristics, the LP800 is an essential component for: NIR Imaging & Machine Vision: Improving contrast in automated inspection by filtering out ambient visible light. Laser Detection: Protecting sensors from stray light while passing 808nm or 940nm signals. Biometric Systems: Enhancing infrared facial or iris recognition accuracy. Medical Diagnostics: Used in NIR imaging and fluorescence analysis where deep red suppression is required. ### Customization & Service OPTOStokes maintains an extensive in-stock selection of the LP800 to ensure rapid delivery for R&D and prototyping. We provide professional OEM services, including custom sizing (round, square, or irregular shapes) and mounting in standard or custom-threaded rings. Our world-class quality control guarantees consistent performance across every batch. ### Contact for Technical Support Struggling with unexpected background noise or long lead times from other suppliers? OPTOStokes offers the technical expertise and inventory to keep your project on schedule. For bulk pricing or custom specifications, please contact our engineering team at sales@optofilters.com or submit an inquiry through our website. --- ## LP750nm Longpass Optical Filter | Transmission 750-1100nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/241.html **Summary**: The OPTOStokes LP750nm Longpass Filter blocks all visible light (350-750nm) while transmitting >90% of NIR signals. Ideal for covert surveillance and IR sensing. > **Detail Content:** ![Image: High Contrast NIR Filter for Covert Surveillance & Sensing](https://www.optofilters.com/uploads/allimg/20251210/1-251210191121H9.webp) The OPTOStokes LP750nm is a professional-grade longpass filter that serves as a definitive boundary between the visible world and the Near-Infrared (NIR) spectrum. Visually appearing as opaque black glass to the human eye, this filter is engineered to block the entire visible spectrum up to 750nm, ensuring that only infrared signals reach your detector. Designed for high-performance optical systems, the LP750nm provides a high-efficiency transmission window from 750nm to 1100nm, with an average throughput greater than 90 percent. By rigorously attenuating ultraviolet and visible light to levels less than 1 percent, it eliminates visual noise and enhances the signal integrity of NIR sensors. The standard 1.0mm thickness offers excellent mechanical rigidity, making it suitable for mounting in industrial lens assemblies and laboratory fixtures. ### Technical Specifications The following table outlines the verified optical and mechanical parameters for SKU 21103958. These specifications are critical for engineers designing systems requiring absolute visible light suppression. Optical Characteristics & Physical Dimensions| Parameter | Specification | | | Model | LP750nm Longpass Filter | | | Passband (Transmission) | 750nm - 1100nm (Avg T > 90%) | | | Blocking Range | 350nm - 750nm (Avg T < 1%) | | | Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | | SKU | 21103958 | | ### Typical Applications Because it blocks all visible light while passing IR, the LP750nm is indispensable for "covert" and precision sensing applications: Covert Surveillance: Used in front of CCTV lenses to block visible light, allowing the camera to see only under IR illumination (750nm, 850nm, or 940nm) for discreet night monitoring. Iris Recognition & Biometrics: Filters out ambient light interference to capture high-contrast images of the iris using NIR wavelengths. Machine Vision: Essential for inspection systems using IR detector arrays, removing the noise caused by factory lighting or sunlight variation. Remote Sensing: Used in NDVI analysis (vegetation health) to isolate the near-infrared reflectance of plant life. ### Customization & Manufacturing OPTOStokes provides tailored solutions to fit your specific instrument design. Our custom optical filters service includes: Geometry: We can cut and edge the 1.0mm substrate into circles, squares, or custom shapes. Mounting: Available as bare glass or pre-mounted in threaded aluminum rings (e.g., M25.5, M27, M30.5). Verification: Every production lot is spectrally verified to ensure the cut-on wavelength meets the ± tolerance. ### Reliable Optics for Critical Systems Consistency is key when integrating IR optics. OPTOStokes maintains a robust inventory of LP750nm materials to ensure short lead times for both prototyping and mass production. We help you move from concept to market faster with reliable, high-quality optical components. Need technical specifications or a volume quote? Contact our engineering sales team at sales@optofilters.com. --- ## LP750nm Longpass Filter | Transmission 750-1100nm, 0.3mm Ultra-Thin **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/240.html **Summary**: The OPTOStokes LP750nm Longpass Filter features an ultra-thin 0.3mm profile, transmitting >90% of NIR light (750-1100nm) while blocking visible spectrum. Ideal for compact sensors. > **Detail Content:** ![Image: 0.3mm 750nm longpass](https://www.optofilters.com/uploads/allimg/20251210/1-2512101Z600448.webp) The OPTOStokes LP750nm is a specialized ultra-thin longpass filter designed for next-generation optical systems where space and weight are at a premium. With a substrate thickness of just 0.3mm, this component minimizes optical path length shift and fits easily into extremely compact housings, making it a preferred choice for portable devices and integrated sensors. Despite its slender profile, the LP750nm delivers robust optical performance. It effectively blocks the entire visible spectrum and ultraviolet light from 350nm up to 700nm with transmission levels below 1 percent. In the Near-Infrared (NIR) region, it opens up a clear transmission window from 750nm to 1100nm, achieving an average throughput greater than 90 percent. This combination of deep visible blocking and high NIR transmission is essential for creating high-contrast images in NIR imaging applications without the bulk of standard optics. ### Technical Specifications The following table details the optical and mechanical specifications for this ultra-thin filter. The corrected transmission range ensures reliable performance for NIR-specific applications. Optical Parameters & Physical Dimensions| Feature | Specification | | | Product Model | LP750nm Longpass Filter | | | Passband (Transmission) | 750nm - 1100nm (Avg T > 90%) | | | Blocking Range | 350nm - 700nm (Avg T < 1%) | | | Thickness | 0.3mm (Ultra-Thin) | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Typical Applications The 0.3mm thickness combined with a 750nm cut-on makes this filter uniquely suited for: Compact Sensors & Handheld Devices: Ideal for integration into mobile scanners, gesture recognition modules, and portable biometrics where Z-height is limited. UAV & Drone Cameras: Reduces payload weight while enabling vegetation analysis (NDVI) or night vision capabilities. Covert Surveillance: Blocks visible red glow from IR illuminators (850nm/940nm) while allowing the camera to see in the dark. Focus Correction: The thin substrate minimizes focus shift when placed behind a lens in imaging systems. ### Customization & Precision Handling Handling ultra-thin glass requires expertise. OPTOStokes offers specialized custom optical filter processing for delicate substrates. Micro-Sizing: We can dice 0.3mm wafers into micro-filters as small as 2mm x 2mm for sensor-level bonding. Shape Complexity: Available in round, square, or custom shapes to match your mechanical design. Coatings: Custom anti-reflective (AR) coatings can be applied to further optimize transmission. ### Agile Manufacturing for Modern Optics Don't let component size limit your design innovation. OPTOStokes specializes in the difficult-to-manufacture specs that standard suppliers avoid. Whether you need a few prototypes for a new wearable device or volume production for consumer electronics, we have the stock and the capability to deliver. Need a quote for ultra-thin optics? Contact our engineering team at sales@optofilters.com to discuss your project requirements. --- ## LP690nm Longpass Filter | Transmission 690-1100nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/239.html **Summary**: The OPTOStokes LP690nm Longpass Filter provides >90% transmission from 690nm to 1100nm while blocking visible light up to 670nm. Ideal for NIR sensing and imaging. > **Detail Content:** ![Image: near-infrared imaging filter](https://www.optofilters.com/uploads/allimg/20251210/1-2512101T324160.webp) The OPTOStokes LP690nm is a high-efficiency longpass filter engineered to act as a decisive gatekeeper between the visible spectrum and the Near-Infrared (NIR). With a cut-on wavelength positioned at the very edge of human vision, this component is designed to transmit NIR signals with exceptional clarity while rigorously suppressing visual noise. Optimized for demanding optical systems, the LP690nm delivers an average transmission greater than 90 percent across the 690nm to 1100nm range. This ensures maximum photon throughput for NIR imaging sensors and detectors. Simultaneously, it provides a deep blocking depth of less than 1 percent transmission from 350nm up to 670nm. This robust attenuation of ultraviolet and visible light—including standard red wavelengths—makes it a critical component for enhancing contrast and signal integrity in environments with mixed lighting conditions. ### Technical Specifications The table below outlines the specific optical and physical parameters for SKU 21103203. These specifications are verified to meet the precision requirements of industrial and scientific applications. Optical Characteristics & Dimensions| Feature | Specification | | | Product Type | Longpass Filter (LP) | | | Passband Range | 690nm - 1100nm (Avg T > 90%) | | | Blocking Range | 350nm - 670nm (Avg T < 1%) | | | Substrate Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | | SKU | 21103203 | | ### Typical Applications The LP690nm is versatile for applications requiring the separation of NIR signals from visible light sources: Fluorescence Microscopy: Functions as an effective emission filter for deep red filter dyes and NIR fluorophores (e.g., Cy5.5), ensuring excitation light is fully blocked. IR Photography & Surveillance: Allows 750nm, 850nm, or 940nm IR illuminators to pass while darkening the image to visible light, creating high-contrast night vision. Machine Vision: Eliminates interference from ambient factory lighting or daylight, allowing vision systems to focus solely on IR strobe reflections. Laser Safety & Alignment: Blocks visible pointing lasers while transmitting IR working beams (system dependent). ### Customization & Manufacturing OPTOStokes is dedicated to providing solutions that fit your hardware, not just our catalog. Our custom optical filters capabilities include: Precision Sizing: We can cut and edge-grind filters to tolerances suitable for compact sensor housings. Assembly: Options for cementing into custom cells or mounting in standard thread rings. Quality Assurance: Rigorous spectral testing ensures every batch meets the transmission and blocking specs. ### Streamline Your Optical Supply High-performance optics should be readily available. We maintain a strategic inventory of LP690nm filters to support rapid prototyping and bridge-to-production needs. Trust OPTOStokes for consistent quality and reliable delivery schedules. Ready to upgrade your system's performance? Contact our engineering team at sales@optofilters.com for quotes, technical support, or inventory checks. --- ## LP680nm Longpass Filter | Transmission 680-1100nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/238.html **Summary**: The OPTOStokes LP680nm Longpass Filter delivers >90% transmission from 680nm to 1100nm while blocking UV and visible light. Ideal for NIR imaging and fluorescence. > **Detail Content:** ![Image: 680nm edge filter](https://www.optofilters.com/uploads/allimg/20251210/1-2512101S43V61.webp) The OPTOStokes LP680nm is a specialized longpass filter engineered to mark the precise transition between the visible spectrum and the Near-Infrared (NIR). By establishing a cut-on wavelength at 680nm, this component effectively eliminates visible light interference—blocking wavelengths up to 665nm—while acting as a transparent gateway for deep red filter and NIR applications. Designed for high-fidelity optical systems, the LP680nm offers an average transmission greater than 90 percent across the 680nm to 1100nm range. This high throughput is essential for maximizing signal strength in low-light NIR imaging and sensor applications. With a tight blocking margin ending at 665nm, it provides superior separation of signals, making it an ideal choice for systems that require the suppression of standard red LEDs or HeNe laser lines while passing longer wavelengths. ### Technical Specifications The table below provides the verified optical and mechanical parameters for SKU 21106902. These specifications ensure reliable integration into R&D setups and OEM instruments. Optical Performance & Physical Specs| Feature | Specification | | | Model | LP680nm Longpass Filter | | | Passband (Transmission) | 680nm - 1100nm (Avg T > 90%) | | | Blocking Range | 350nm - 665nm (Avg T < 1%) | | | Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | | Reference SKU | 21106902 | | ### Typical Applications The spectral characteristics of the LP680nm make it highly effective for applications requiring visible noise reduction and NIR signal enhancement: Biomedical Imaging: Ideal for deep tissue imaging and fluorescence microscopy where excitation light (typically below 660nm) must be blocked to detect faint NIR emission. Machine Vision: Used in conjunction with 700nm-1000nm IR lighting to inspect products, ignoring color variations and ambient visible light. Surveillance: Enables discrete night vision by filtering out visible spotlights while allowing IR illuminators to function effectively. Chlorophyll Analysis: Helps in isolating specific fluorescence bands in agricultural sensing. ### Customization & Manufacturing OPTOStokes offers flexible options to fit your specific optical path. Whether you are developing a compact handheld device or a large benchtop instrument, our custom optical filters service adapts to your needs. Sizing: We cut to standard diameters (e.g., 12.5mm, 25mm) or custom squares and rectangles. Mounting: Available in standard filter rings or custom holders. Consistency: Strict quality control ensures lot-to-lot uniformity for volume production. ### Accelerate Your Development Stop waiting for lead times to catch up with your innovation. At OPTOStokes, we prioritize keeping essential filters like the LP680nm in stock or ready for rapid modification. We help you move from prototype to production with speed and confidence. Need technical advice or a quote? Our team of optical engineers is ready to assist. Email us at sales@optofilters.com for a quick response. --- ## LP670nm Longpass Filter | Transmission 670-1100nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/237.html **Summary**: The OPTOStokes LP670nm Longpass Filter transmits light from 670-1100nm with >90% efficiency while blocking UV and visible ranges. Ideal for deep red and NIR imaging applications. > **Detail Content:** ![Image: 670nm longpass filter](https://www.optofilters.com/uploads/allimg/20251209/1-2512091G33E31.webp) The OPTOStokes LP670nm is a precision-engineered 670nm longpass filter designed to demarcate the boundary between the visible spectrum and the Near-Infrared (NIR). This filter is critical for applications that require the isolation of deep red filter wavelengths or the clean transmission of NIR signals while rigorously suppressing visible light noise. With a clear aperture transmitting wavelengths from 670nm to 1100nm at an efficiency greater than 90 percent, the LP670nm ensures maximum signal throughput for your sensors. Conversely, its blocking capabilities are robust, attenuating ultraviolet and visible light from 350nm up to 650nm to levels less than 1 percent. This high contrast performance makes it an indispensable component for improving signal-to-noise ratios in laser diode systems, NIR imaging, and fluorescence detection setups where background light elimination is paramount. ### Technical Specifications The following table outlines the key optical and physical characteristics for SKU 21105112. These specifications ensure consistent performance for both prototyping and volume production. Optical Parameters & Physical Dimensions| Parameter | Specification | | | Product Model | LP670nm Longpass Filter | | | Passband (Transmission) | 670nm - 1100nm (Avg T > 90%) | | | Blocking Range | 350nm - 650nm (Avg T < 1%) | | | Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | | SKU | 21105112 | | ### Typical Applications The sharp cut-on wavelength at 670nm allows this filter to serve multiple advanced optical functions: Laser Diode Cleanup: Used to filter spectral noise from 670nm laser diodes or to block shorter wavelength pump sources. Fluorescence Imaging: Acts as an efficient emission filter for deep red fluorophores, effectively blocking excitation light below 650nm. Machine Vision: Enhances contrast in inspection systems utilizing red or IR illumination by removing ambient visible light interference. Biomedical Sensing: Assists in non-invasive monitoring technologies that rely on tissue transparency in the NIR window. ### Customization & Support Standard catalog items are just the beginning. OPTOStokes offers comprehensive custom optical filter services to meet specific mechanical and optical requirements. Form Factor: Available in custom sizes, including round, square, or irregular shapes to fit your housing. Mounting: We provide unmounted glass or filters pre-assembled in black anodized aluminum rings. Reliability: Every batch is tested to ensure compliance with the specified transmission and blocking curves. ### Partner with Optical Experts Don't let long lead times or inconsistent quality stall your R&D projects. OPTOStokes combines extensive inventory with agile manufacturing capabilities to support your timeline. From single-unit prototypes to large-scale OEM integration, we deliver quality you can trust. Have a specific requirement? Contact our technical sales team at sales@optofilters.com for immediate assistance, stock availability, or to discuss your custom specifications. --- ## LP635 Longpass Filter | Transmission 640-1100nm, 2.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/236.html **Summary**: The OPTOStokes LP635 Longpass Filter features a robust 2.0mm thickness and transmits wavelengths from 640nm to 1100nm. Blocks UV and visible light for high-contrast imaging. > **Detail Content:** ![Image: 635nm optical filter](https://www.optofilters.com/uploads/allimg/20251209/1-2512091FJI52.webp) The OPTOStokes LP635 is a robust longpass filter engineered for applications requiring specific spectral isolation combined with enhanced mechanical stability. With a thickness of 2.0mm, this filter offers superior durability and flatness compared to standard thin-film substrates, making it an excellent choice for rugged industrial environments and precision benchtop setups. Optically, the LP635 is designed to maximize throughput in the deep red and Near-Infrared (NIR) regions. It delivers an average transmission greater than 90 percent across the 640nm to 1100nm range, ensuring clear signal acquisition for NIR imaging sensors. Simultaneously, it effectively suppresses noise by blocking ultraviolet and visible light from 350nm up to 620nm with transmission levels less than 1 percent. This high contrast performance is critical for eliminating ambient light interference in machine vision and fluorescence detection. ### Technical Specifications The table below details the technical parameters for SKU 21105181. The 2.0mm substrate thickness provides added rigidity and ease of handling during system integration. Optical and Physical Parameters| Feature | Specification | | | Model Name | LP635 Longpass Filter | | | Passband | 640nm - 1100nm (Avg T > 90%) | | | Blocking Range | 350nm - 620nm (Avg T < 1%) | | | Substrate Thickness | 2.0mm ± 0.1mm | | | Surface Quality | 60/40 (Scratch/Dig) | | | Part Number | 21105181 | | ### Typical Applications The LP635 filter's combination of spectral precision and 2.0mm physical thickness serves a variety of specialized uses: Industrial Machine Vision: Enhances contrast in inspection systems using red or IR backlights, while the thicker glass withstands vibration and cleaning. Surveillance Cameras: Acts as a day/night filter or IR pass filter to enable clear night vision while blocking visible light pollution. Fluorescence Microscopy: Functions as an emission filter for fluorophores excited in the orange/red spectrum. Sensor Protection: Shields silicon photodiodes from stray visible light to prevent saturation. ### Customization & Manufacturing OPTOStokes provides flexible solutions for your optical assemblies. Our custom optical filters service ensures that the LP635 fits your specific hardware requirements. Dimensional Sizing: We can dice or core drill the 2.0mm substrate to precise circular or rectangular dimensions. Mounting Solutions: Options include unmounted glass or pre-installed assembly in standard threaded rings. Volume Scalability: From prototype samples to mass production, we maintain consistent quality control. ### Secure Your Supply Chain Sourcing specific thicknesses like 2.0mm shouldn't be a bottleneck. Many suppliers only stock standard 1.0mm filters, but OPTOStokes maintains inventory of diverse thicknesses to support your unique design constraints. We ensure your production lines keep moving with reliable lead times and consistent optical performance. Need a quote or technical drawing? Reach out to our specialists at sales@optofilters.com. We are ready to assist with stock inquiries or custom specifications. --- ## LP620nm Longpass Optical Filter | Transmission 630-1100nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/235.html **Summary**: The OPTOStokes LP620nm Longpass Filter delivers transmission greater than 90% from 630nm to 1100nm. Ideal for fluorescence and NIR imaging. In-stock and custom sizes available. > **Detail Content:** ![Image: 620nm filter](https://www.optofilters.com/uploads/allimg/20251209/1-2512091F25Y40.webp) The OPTOStokes LP620nm is a high-performance longpass filter designed to efficiently separate spectral regions for demanding optical applications. By blocking ultraviolet and visible light up to 615nm while maintaining high transparency in the red and near-infrared (NIR) spectrums, this component is essential for improving signal-to-noise ratios in photonic systems. Engineered for precision, this filter allows wavelengths from 630nm to 1100nm to pass with an average transmission greater than 90 percent. Whether used in fluorescence microscopy to isolate red emission signals or in machine vision to suppress ambient light noise, the LP620nm ensures that your sensor receives only the relevant spectral data. Backed by OPTOStokes' commitment to world-class quality, each filter features a surface quality of 60/40, minimizing scattering and artifacts in sensitive imaging setups. ### Technical Specifications The following table outlines the specific optical and physical parameters for SKU 21106124. These specifications are verified to meet the rigorous standards of R&D and industrial integration. | Parameter | Specification | | | Product Type | Longpass Filter (LP) | | | Cut-on Wavelength | 620nm Nominal | | | Transmission Range | 630nm - 1100nm (Avg T > 90%) | | | Blocking Range | 350nm - 615nm (Avg T < 1%) | | | Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | | SKU | 21106124 | | ### Typical Applications The sharp transition edge and wide transmission band of the LP620nm make it a versatile choice for various optical systems. Common use cases include: Fluorescence Imaging: Ideal for acting as an emission filter for fluorophores that emit in the red spectrum, effectively blocking excitation light below 615nm. Machine Vision & Inspection: Used with red LED lighting or laser sources to eliminate interference from ambient sunlight or fluorescent overhead lighting, increasing contrast. NIR Sensing: Protects silicon sensors in Near-Infrared applications by filtering out visible noise, suitable for surveillance and eye-tracking systems. Spectral Sorting: separation of signals in multi-channel optical setups. ### Customization & Service At OPTOStokes, we understand that standard sizes do not fit every housing. While we maintain a robust inventory of standard custom optical filters for immediate testing, we specialize in adapting to your mechanical constraints. Shape Options: We can cut filters to round, square, or irregular geometries based on your drawings. Mounting: Available unmounted or pre-mounted in standard anodized aluminum rings. Quality Assurance: All custom orders undergo the same rigorous spectral verification as our stock products. ### Streamline Your Optical Procurement Project delays due to component sourcing should be a thing of the past. Whether you need a single filter for a proof-of-concept or volume production for a new instrument, OPTOStokes delivers world-class precision with reliable lead times. Do not compromise on your system's optical quality. Ready to optimize your optical path? Contact our engineering team today at sales@optofilters.com for technical support, current stock levels, or a rapid quote on custom dimensions. --- ## 555nm & 655nm & 835nm Triple Bandpass Filter | High Transmission Multi-Band Optics **Type**: Products **URL**: https://www.optofilters.com/Multi/233.html **Summary**: Optimize your multi-channel systems with OPTOStokes 555/655/835nm Triple Bandpass Filter. Features >90% transmission and precision blocking. In-stock & custom options available. > **Detail Content:** ![Image: multi-band fluorescence microscopy](https://www.optofilters.com/uploads/allimg/20251208/1-25120R00S0D7.webp) In the demanding field of multi-channel fluorescence microscopy and advanced instrumentation, precision is non-negotiable. The OPTOStokes 555nm, 655nm, and 835nm Triple Bandpass Filter is engineered to simultaneously capture three distinct spectral bands—Green, Red, and Near-Infrared (NIR)—with exceptional clarity. By enabling the detection of multiple fluorophores or laser lines without the need for mechanical filter wheels, this component significantly enhances system speed and data throughput. Designed for R&D engineers and system integrators requiring high signal-to-noise ratios, this filter utilizes advanced hard-coating technology. It delivers average transmission rates greater than 90 percent across all three passbands while maintaining deep blocking (transmission less than 1 percent) in the out-of-band regions from 350nm to 1050nm. This ensures that crosstalk is minimized, making it an ideal solution for complex imaging setups and biomedical applications. ### Technical Specifications The following table details the optical performance and physical parameters of this triple-band component. All specifications are verified to meet world-class quality standards. Optical & Physical Parameters| Parameter | Specification | | | Center Wavelengths (CWL) | 555nm ±2nm, 655nm ±2nm, 835nm ±2nm | | | Full Width at Half Maximum (FWHM) |            Band 1: 20nm ±2nm            Band 2: 20nm ±2nm            Band 3: 30nm ±2nm | | | Transmission Bands |            550-560nm (Tave > 90%)            650-670nm (Tave > 90%)            835-845nm (Tave > 90%) | | | Blocking Range | 350-1050nm (T < 1% outside passbands) | | | Angle of Incidence (AOI) | 0 degrees | | | Surface Quality | 60/40 Scratch-Dig or better | | ### Typical Applications This triple bandpass filter is versatile and suited for various high-precision environments. Key applications include: Multi-Channel Fluorescence Microscopy: Ideal for simultaneous visualization of multiple targets, compatible with standard dyes and NIR imaging markers. Flow Cytometry: precise wavelength separation for sorting and analysis. Laser Line Cleaning: Filtering specific excitation lines in multi-laser systems. Biomedical Instrumentation: Used in DNA sequencing and PCR devices requiring distinct separation of green, red, and IR signals. ### Customization & Manufacturing Excellence At OPTOStokes, we understand that standard off-the-shelf sizes do not fit every optical design. We offer comprehensive customization services to meet your specific integration requirements. Dimensions: Available in standard round sizes (e.g., 12.5mm, 25mm) or custom squares and rectangles. Substrates: High-quality fused silica or BK7 equivalent glass options. Mounting: We provide bare filters or mounted options in black anodized aluminum rings for easy system integration. Our manufacturing process leverages state-of-the-art coating technologies to ensure durability and environmental stability. As a dedicated custom optical filter provider, we guarantee consistent batch-to-batch performance. ### Ready to Optimize Your Optical System? Sourcing reliable multi-band optics with short lead times can be a challenge. OPTOStokes bridges this gap with an extensive in-stock selection and rapid prototyping capabilities. Whether you need a single prototype for validation or volume production for your instrument, our engineering team is ready to assist. Contact us today to discuss your specifications or request a quote.    Email: sales@optofilters.com --- ## Ultra Narrow Bandpass Filters (UNBF) | FWHM 1-2nm, OD ≥4 Custom Precision **Type**: Products **URL**: https://www.optofilters.com/UNBFs/232.html **Summary**: OPTOStokes Ultra Narrow Bandpass Filters feature 1-2nm FWHM and ≥OD4 blocking (400-1100nm custom range). Maximize SNR for laser & sensing. Inquire about OEM specs. > **Detail Content:** The **OPTOStokes Ultra Narrow Bandpass Filter (UNBF)** series is designed for applications demanding the highest level of spectral isolation and signal-to-noise ratio (SNR). With a specified Full Width Half Maximum (FWHM) between **1nm and 2nm**, these filters are precision-engineered to select individual laser lines or specific emission peaks with unmatched accuracy. Our UNBF ultra narrow bandpass filters provide researchers and OEM system designers with exceptional performance across the custom configurable range of **400nm to 1100nm** (Visible to Near-Infrared). The critical feature is the robust out-of-band rejection: a guaranteed **Optical Density (OD) of greater than or equal to 4** (≥OD4) across a wide blocking range (200nm to 1000nm, subject to customization), ensuring that stray light is virtually eliminated. ### Technical Performance Specifications OPTOStokes UNBF performance metrics are customized to your exact system requirements, focusing on precision and rejection depth. | Specification | Customizable Parameter / Range | | | Center Wavelength (CWL) | 400nm to 1100nm (Customer Specified) | | | Full Width Half Maximum (FWHM) | 1nm to 2nm (Extremely Narrow Bandpass) | | | Peak Transmission | Greater than or equal to 85 percent (Negotiable based on FWHM) | | | Blocking Depth (Out-of-Band) | Optical Density ≥ 4 (T < 0.01 percent) | | | Blocking Range | 200nm to 1000nm (Negotiable, Deep UV to NIR) | | | Product Dimensions | Customized to client specifications | | ### Advanced Applications Requiring High SNR The combination of ultra-narrow FWHM and deep out-of-band blocking makes these filters essential for maximizing the high SNR in complex optical systems: Laser Line Selection: Isolating specific laser excitation or emission lines (e.g., 785nm, 1064nm) in applications like Raman spectroscopy. High-Resolution Fluorescence: Employed in advanced microscopy and sensitive fluorescence detection where separating adjacent spectral lines is mandatory. Free-Space Optical Communications (FSO): Used to filter ambient noise, allowing only the designated communication wavelength to pass. Environmental Sensing: Isolating narrow spectral bands for gas analysis or chemical detection. Ultra-Narrow Bandpass Filter Specifications| Product | CWL | FWHM | Peak  Transmission | Blocking  Range | Blocking  Depth | Mounted  Sizes | | | UNBP-420 | 420 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | ∅12.7 mm  &   ∅25.4 mm | | | UNBP-558 | 558 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-582 | 582 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-777 | 777.2 ± 0.3 nm | 1.2 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-785 | 785 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-795 | 795 ± 0.3 nm | 2 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-926 | 926.3 ± 0.5 nm | 1.5 ± 0.5 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-1064 | 1064 ± 0.5 nm | 1.7 ± 0.5 nm | >80% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-1570 | 1570 ± 1 nm | 5 ± 1 nm | >90% | 400-1100nm (customizable) | ≥OD4 | | ### Customization and Reliability for OEM Partners For projects requiring extreme precision and reliable sourcing, OPTOStokes offers **high-level customization support**. We specialize in translating stringent technical needs—including specialized blocking depths (high blocking), unique dimensions, or non-standard CWLs—into consistently manufactured optical components. We guarantee **world-class quality and precision** through rigorous quality control and technical expertise accumulated over 30 years. Our process ensures **reliable lead times** for your high-value instruments. ### Maximize Your Signal Integrity In demanding scientific and industrial environments, sacrificing signal quality due to inferior filtering is not an option. If your current supplier cannot meet the performance benchmark of FWHM 1-2nm and $\ge$OD4 blocking, or if you need reliable delivery for high-volume OEM projects, OPTOStokes is ready. Challenge us with your most demanding specifications. Contact our engineering team today to initiate your custom filter design and discuss our **extensive in-stock selection** for rapid prototyping. Email: **sales@optofilters.com**. --- ## LP610 Longpass Filter | 610nm Cut-on Edge, 1.0mm Thickness, T > 90% **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/230.html **Summary**: OPTOStokes LP610 Longpass Filter provides >90% transmission (600-1100nm) and deep blocking (350-575nm). Ideal for advanced NIR imaging > **Detail Content:** The **OPTOStokes LP610 Longpass Filter** (P/N: 21102764) is a high-performance longpass filter engineered for applications that require stringent spectral separation between the visible and near-infrared (NIR) ranges. This filter provides a sharp cut-on at **610nm**, effectively transmitting light in the red and NIR spectrum while suppressing shorter wavelengths. Designed using advanced optical coating techniques, the LP610 maximizes throughput for your detection system. The passband exhibits an average transmission rate of **greater than 90 percent** across 600nm to 1100nm, ensuring minimal signal attenuation. Simultaneously, the filter achieves excellent noise reduction by blocking light from 350nm to 575nm with a transmission rate of **less than 1 percent**. ### Technical Specifications R&D engineers and technical decision-makers depend on precise specifications. Below are the core technical parameters for the LP610 filter: | Specification | Parameter / Value | | | Product Type | Longpass Filter (LP610) | | | Cut-on Edge Wavelength (CWL) | 610nm | | | Passband Transmission | 600nm - 1100nm @ T average greater than 90 percent | | | Blocking Range | 350nm - 575nm @ T less than 1 percent (High Rejection) | | | Standard Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Key Applications This high transmission filter is a critical optical component for minimizing background noise and isolating specific long-wavelength signals, making it indispensable for: Fluorescence Detection: As an emission filter in fluorescence filters systems, particularly those using red-emitting dyes, by effectively blocking residual green/yellow excitation energy. NIR Filter-based Machine Vision: Enhancing contrast and image quality in industrial sorting and quality control by suppressing unwanted visible light noise. Medical and Life Sciences: Used in photometry and spectroscopy instrumentation where accurate NIR signal isolation is paramount. ### Customization & Service: The OPTOStokes Advantage OPTOStokes delivers **world-class quality and precision** optics supported by reliable lead times and guaranteed performance. We understand that projects require flexibility. Beyond our **extensive in-stock selection** for rapid deployment, we specialize in **high-level customization support**. We can manufacture this filter in custom sizes, various thicknesses, or mounted in a retention ring to meet the exact form factor required for your instrument design. ### Solving Your Optical Supply Chain Challenges Are you struggling with long lead times, unreliable quality, or insufficient technical support from your current optical supplier? OPTOStokes provides the solution: guaranteed **quality assurance** and technical consultation from our 30+ year experts. Stop sacrificing project schedules for quality. Leverage our ready stock or discuss your unique specifications (including square, circular, or custom shapes) for a dependable supply chain. Connect directly with our technical sales team for immediate inquiries or detailed custom project quotes. Email us at **sales@optofilters.com**. --- ## LP600 Longpass Filter | 600nm Cut-on Edge, T > 90% (600-1100nm), 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/229.html **Summary**: OPTOStokes LP600 Longpass Filter features greater than 90% transmission (600-1100nm) and excellent blocking (350-575nm). Ideal for NIR sensing. > **Detail Content:** The **OPTOStokes LP600 Longpass Filter** (P/N: 21102764) is an industrial-grade longpass filter designed to efficiently separate the red and near-infrared (NIR) spectrum from shorter wavelengths. Leveraging advanced optical coating technology, this component provides a sharp spectral transition and outstanding throughput for demanding sensing and imaging applications. The filter's primary strength is its clear **600nm Cut-on Edge**, initiating a high-transmission passband that extends across 600nm to 1100nm with an average transmission rate of greater than 90 percent. This level of performance is critical for minimizing signal loss in the NIR range. ### Technical Specifications Engineered for reliable integration, the LP600 filter meets demanding technical requirements for stability and optical clarity. | Specification | Parameter / Value | | | Product Type | Longpass Filter (LP600) | | | Cut-on Edge Wavelength | 600nm | | | Passband Transmission | 600nm - 1100nm @ T average greater than 90 percent | | | Blocking Range | 350nm - 575nm @ T less than 1 percent | | | Standard Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Optimal Applications and Use Cases The robust high transmission filter performance in the red and NIR spectrum makes the LP600 suitable for precision applications including: NIR Filter-based Sensing: Ideal for systems requiring the isolation of NIR light, such as agricultural sensing, remote surveillance, or security cameras. Fluorescence Instrumentation: Employed as an emission filter in fluorescence filters setups to block excitation wavelengths (e.g., green/yellow lasers) while passing red-shifted emission signals. High-Speed Machine Vision: Enhances contrast and clarity in industrial inspection by eliminating unwanted short-wavelength ambient light. ### OPTOStokes Advantage: Quality and Customization OPTOStokes is your reliable partner for high-quality optical components. We offer an **extensive in-stock selection** to support fast prototyping and small-volume orders, coupled with comprehensive technical support for large-scale integration. If your project demands unique form factors (e.g., square or complex shapes) or tighter tolerances, our **high-level customization support** ensures your exact specifications are met with guaranteed quality and reliable lead times. **Need Technical Consultation or Volume Pricing?** Ensure the success of your project by selecting a reliable, high-performance optical component. Contact us with your technical requirements or request a quote for P/N 21102764. Email: **sales@optofilters.com**. --- ## ​LP595 Longpass Filter | CWL 595±3nm, High T 600-1100nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/228.html **Summary**: OPTOStokes LP595 Longpass Filter features a precise 595nm CWL and greater than 90% transmission across 600-1100nm. Block UV/Visible light efficiently. > **Detail Content:** ### The **OPTOStokes LP595 Longpass Filter** (P/N: 21102765) is a high-precision longpass filter designed for critical optical paths requiring an extremely sharp transition between the visible and near-infrared (NIR) spectrum. Engineered with advanced multi-layer optical coating, this component ensures that less than 1 percent of light is transmitted below 590nm while providing superior throughput up to 1100nm. The core performance is defined by its highly accurate Cut-on Wavelength (CWL) at 595nm, making it indispensable for systems where spectral accuracy directly impacts measurement quality and image contrast. ### Technical Specifications This filter delivers robust performance parameters with world-class quality and precision, suitable for R&D and high-volume production. | Specification | Parameter / Value | | | Product Type | Longpass Filter (LP595) | | | Cut-on Wavelength (CWL) | 595nm plus or minus 3nm (at T=50% plus or minus 5%) | | | Passband Transmission | 600nm - 1100nm @ T average greater than 90 percent | | | Blocking Range | 350nm - 590nm @ T less than 1 percent | | | Standard Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Key Applications and System Integration The precise 595nm CWL combined with the broad, high transmission filter passband into the NIR region makes the LP595 essential for several demanding fields: Fluorescence Microscopy: Used as an emission fluorescence filters for fluorophores excited near 595nm or for isolating red-shifted emission light from the excitation source. Machine Vision & Inspection: Critical for high-contrast imaging in the red/NIR spectrum, often for sorting or detecting specific features invisible to the human eye. NIR Filter and Sensing: Serves as an effective component in multi-spectral sensing and general spectroscopy where visible light interference must be efficiently blocked. ### Customization and Reliable Partnership OPTOStokes understands that system integrity relies on component consistency. We provide both **extensive in-stock selection** and high-level customization support for specialized shapes, sizes, and improved surface quality (e.g., 40/20 or better). We are committed to world-class quality, controllable lead times, and guaranteed performance. **Take Action:** If you require guaranteed precision for your R&D project or volume pricing for P/N 21102765, contact our technical sales team for prompt assistance and detailed technical consultation. Email: **sales@optofilters.com**. --- ## LP580nm Longpass Filter | OD5 Deep Blocking, 575-825nm Passband **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/227.html **Summary**: OPTOStokes LP580 Longpass Filter features powerful OD5 blocking (350-565nm) and high T (>90%) across 575-825nm. Essential for high-contrast R&D > **Detail Content:** ### The **OPTOStokes LP580 Longpass Filter** (P/N: 2200300016) is engineered for high-sensitivity optical systems requiring superior short-wave rejection. Designed with a precisely controlled 580nm cut-on, this longpass filter achieves maximum attenuation of unwanted visible and UV light (350-565nm) while maintaining exceptional throughput across the 575nm to 825nm passband. This filter is crucial for maximizing the signal-to-noise ratio in demanding analytical instruments. ### Technical Specifications The filter’s remarkable blocking performance is achieved through advanced optical coating technology, ensuring reliable and repeatable spectral isolation for your application. | Specification | Parameter / Value | | | Product Type | Longpass Filter (LP580) | | | Transmission Range (Passband) | 575nm - 825nm @ T greater than 90 percent | | | Blocking Range (Stopband) | 350nm - 565nm @ T less than 0.001 percent | | | Optical Density (OD) | OD5 minimum attenuation (350-565nm) | | | Standard Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Applications Requiring High Background Suppression The **OD5 Deep Blocking** characteristic positions the LP580 as a core component in systems where high excitation light leakage cannot be tolerated. High-Sensitivity Fluorescence Detection: Ideal as an emission filter in fluorescence optics, specifically for Fluorophores emitting above 580nm (e.g., Rhodamine, Cy3), ensuring clean separation from blue/green excitation sources. Confocal Microscopy & Flow Cytometry: Provides the necessary noise reduction for low-signal biological assays and spectral measurements. Advanced Imaging Filter Systems: Used in industrial inspection and remote sensing where scattered short-wave ambient light must be eliminated for optimal data acquisition. ### Customization, Quality, and Lead Time As a technical decision-maker, you require precision and reliable supply. The OPTOStokes team, with decades of experience, delivers world-class quality and highly dependable lead times. Need a variation of this filter? We specialize in high OD filter customization, including different cut-on slopes, higher OD levels (up to OD7), and a full range of mechanical formats (circular, square, non-standard shapes). Our 60/40 surface quality guarantees clear, scatter-free performance in critical imaging paths. ### Guaranteed Performance and Supply Chain Reliability Don't compromise your project timeline or data integrity with uncertain quality or lengthy lead times. We offer **extensive in-stock selection** for immediate prototyping (use P/N 2200300016) and a guaranteed process for high-volume custom orders. We minimize your risk by ensuring our product specifications meet or exceed your rigorous technical requirements. **Action Required:** For technical support, custom quotes, or to confirm stock availability, please contact our expert team at **sales@optofilters.com**. --- ## LP555nm Longpass Filter | Cut-on 555nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/226.html **Summary**: OPTOStokes LP555nm Longpass Filter features >90% transmission (560-1100nm) and deep blocking <1% below 555nm. Ideal for fluorescence and imaging contrast. > **Detail Content:** The OPTOStokes LP555 Longpass Filter (Part Number: 21106042) is a precision optical component designed to transmit wavelengths longer than the 555nm cut-on point while effectively blocking the ultraviolet, blue, and green spectrum. With a sharp transition edge, this filter achieves high throughput (>90%) starting immediately at 560nm and extending into the Near-Infrared (NIR) up to 1100nm. It is an ideal solution for applications requiring high spectral purity and enhanced signal contrast in the Vis-NIR range. ### Technical Specifications Engineered using high-grade optical glass and advanced thin-film deposition, this filter delivers consistent performance for imaging and sensing systems. | Specification | Parameter / Value | | | Product Type | Longpass Filter (LP555) | | | Reference Part Number | 21106042 | | | Passband (Transmission) | 560nm - 1100nm @ T > 90% | | | Stopband (Blocking) | 350nm - 555nm @ T < 1% | | | Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Primary Applications The LP555 is a versatile longpass filter used to suppress short-wavelength noise and isolate specific spectral bands: Fluorescence Imaging: Acts as a barrier emission filter to block excitation light (blue/green) while passing yellow/red fluorescence signals. Machine Vision: Enhances contrast in inspection systems by blocking ambient UV and visible light, allowing only red or IR LED illumination to pass. Spectral Sorting: Precisely separates the wavelength range for multi-channel sensors and detectors. Photography: Used as a contrast filter to darken skies and reduce atmospheric haze in monochrome photography. ### Customization & Engineering Support OPTOStokes offers comprehensive manufacturing services to adapt the LP555 to your mechanical constraints. Dimensions: While standard filter thickness is 1.0mm, we can process sizes from micro-optics (2mm) up to large aperture plates (100mm+). Custom shapes (round, square, rectangular) are available via precision dicing. Optical Coating: We can adjust the optical coating design to modify the cut-on wavelength (400-850nm) or increase blocking depth (OD) for higher sensitivity applications. Mounting: Filters can be supplied unmounted or assembled into threaded aluminum rings for easy system integration. ### Why Choose OPTOStokes? Sharp Spectral Transition: The transition from blocking (555nm) to transmission (560nm) is exceptionally steep, minimizing signal loss and ensuring precise spectral separation. Quality Assurance: With a surface quality of 60/40, this imaging filter minimizes scattering and defects, ensuring clear image quality for industrial and scientific cameras. Ready to Order? Reference Part #21106042 for stock inquiries. Contact our sales team at sales@optofilters.com for volume pricing or to discuss custom optical design requirements. --- ## LP550nm Longpass Filter | Cut-on 550nm, T>94% **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/225.html **Summary**: OPTOStokes LP550nm Longpass Filter features superior >94% transmission from 560-1100nm and blocking <0.1% below 540nm. Ideal for fluorescence and spectral sorting. > **Detail Content:** ### The OPTOStokes LP550 Longpass Filter is a high-efficiency optical edge filter designed to sharply define spectral bands. With a precise cut-on wavelength at 550nm, this filter appears yellow/orange, effectively blocking ultraviolet, blue, and green wavelengths while transmitting yellow, red, and near-infrared light. Distinguished by its exceptional throughput, it offers a transmission rate greater than 94% across the 560nm-1100nm range, making it a critical optical component for light-starved imaging and sensing applications. ### Technical Specifications Manufactured using premium optical glass and advanced coating technologies, the LP550 ensures minimal signal loss and excellent environmental stability. | Specification | Parameter / Value | | | Product Type | Longpass Filter (LP550) | | | Center Wavelength (Cut-on) | 550 ± 3nm | | | Passband (Transmission) | 560 - 1100nm @ T > 94% | | | Stopband (Blocking) | 350 - 540nm @ T < 0.1% | | | Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Key Applications The LP550's combination of deep blocking and high transmission makes it versatile for various optical systems: Fluorescence Microscopy: Functions as a barrier filter to block shorter excitation wavelengths while passing longer fluorescence emissions. Spectral Analysis: Isolates the specific wavelength range of interest in multi-channel spectrometers. Machine Vision & Photography: Enhances contrast by eliminating atmospheric haze (UV/Blue scatter) and sharpening features in monochrome imaging. LIDAR & Sensors: Blocks visible noise while allowing NIR signal to pass. ### Customization & Engineering Support At OPTOStokes, we offer flexible manufacturing options to integrate our filters into your specific design. Size & Shape: Standard 1.0mm thickness available in square or round formats. We provide custom optical filters dicing services for non-standard housing. Performance Tuning: We can modify the cut-on wavelength (400nm-850nm) and blocking depth (OD) to meet specific sensor requirements. Mounting: Available unmounted or pre-mounted in anodized aluminum rings. ### Why Choose the LP550? Superior Signal-to-Noise: Unlike standard filters with lower transmission, our LP550 delivers a high transmission filter profile (T>94%), ensuring that your system captures the maximum amount of signal data while maintaining a dark background (T --- ## LP540nm Longpass Filter | Cut-on 540nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/224.html **Summary**: OPTOStokes LP540nm Longpass Filter delivers >90% transmission from 550-1100nm while blocking UV-Green light. Ideal for fluorescence and machine vision. > **Detail Content:** ### The OPTOStokes LP540 Longpass Filter is a precision optical edge filter designed to transmit wavelengths longer than the 540nm cut-on point while effectively blocking shorter wavelengths. With a high transmission range extending from 550nm into the Near-Infrared (1100nm), this filter appears yellow-orange to the human eye, as it blocks ultraviolet, blue, and green light. It is an essential optical component for applications requiring spectral separation and signal enhancement in the Vis-NIR spectrum. ### Technical Specifications Fabricated from high-quality optical glass, Part Number 21101457 ensures consistent spectral performance and surface quality suitable for imaging systems. | Specification | Parameter / Value | | | Product Type | Longpass Filter (LP540) | | | Part Number | 21101457 | | | Passband (Transmission) | 550-1100nm @ Tave > 90% | | | Stopband (Blocking) | 350-520nm @ T < 1% | | | Thickness | 1.0mm | | | Surface Quality | 60/40 (Scratch/Dig) | | ### Primary Applications This longpass filter is widely utilized in optical setups to eliminate stray light and improve contrast: Fluorescence Imaging: Used as an emission filter to block short-wavelength excitation light while passing longer wavelength fluorescence. Machine Vision: Enhances contrast by blocking blue/green ambient light in inspection systems using red or IR illumination. Spectral Sorting: Separates the visible spectrum for multi-channel detection systems. Photography: Reduces atmospheric haze and emphasizes tonal contrast in monochrome imaging. ### Customization & Manufacturing OPTOStokes provides robust custom optical filters services to meet your specific project requirements. Dimensions: Available in standard sizes (e.g., Ø25mm, 50x50mm) or custom geometries cut to your mechanical housing specs. Substrate & Coating: We can adjust the wavelength range and blocking depth (OD) based on your sensor sensitivity. Surface Quality: Standard 60/40 ensures cost-effectiveness, with higher precision options available for laser applications. ### Why Choose OPTOStokes? Spectral Accuracy: Our LP540 filters deliver a sharp transition and a high transmission filter profile (>90%), ensuring maximum signal throughput for your optical system. In Stock & Ready to Ship: Part #21101457 is available for immediate delivery. For bulk orders or custom specifications, contact our engineering team at sales@optofilters.com. --- ## ROX / mCherry / Alexa Fluor 594 Filter Set | BP560nm Ex, BP635nm Em, DM600nm **Type**: Products **URL**: https://www.optofilters.com/FluorescenceFilterSets/223.html **Summary**: OPTOStokes high-performance filter set for mCherry, ROX, and Alexa Fluor 594. Features OD6 blocking and wide FWHM BP635 for maximum signal collection. > **Detail Content:** ![Image: High-Sensitivity Orange-Red Fluorescence](https://www.optofilters.com/uploads/allimg/20251128/1-25112QU00X45.webp) The OPTOStokes ROX / mCherry / Alexa Fluor 594 Filter Set is engineered for peak performance in the orange-to-red spectrum, targeting popular fluorophores like mCherry, ROX (Reference), and Alexa Fluor 594. This set is optimized to maximize signal collection from dyes with broad emission curves, such as mCherry, utilizing an exceptionally wide 60nm emission bandpass. Simultaneously, the deep optical density (OD) blocking minimizes unwanted signal and noise, delivering the clean background required for high-precision fluorescence detection and quantitative PCR. ### Technical Specifications for High-Performance Imaging Each component features robust, hard-coated optical coatings, guaranteeing long-term stability and consistent spectral performance across the UV to NIR ranges. | Component | Model | Center Wavelength (CWL) | FWHM | Transmission | Blocking (OD) | | | Excitation | BP560-40nm | 560 ± 3nm | 40 ± 3nm | Tave > 90% (545-575nm) | ODave ≥ 6 (200-530nm) ODave ≥ 6 (590-800nm) OD > 3 (800-1050nm) | | | Emission | BP635-60nm | 635 ± 2nm | 60 ± 2nm | Tave > 90% (610-660nm) | ODave ≥ 6 (200-595nm) ODave ≥ 6 (680-800nm) OD > 3 (800-1050nm) | | | Dichroic Mirror | DM600 | Cut-off ~600nm | N/A | T > 95% (615-700nm) | T < 2% (430-595nm) @ 45° AOI | | ### Target Applications The unique spectral configuration of these filter sets makes them indispensable for: qPCR and Real-Time PCR: Essential for utilizing ROX as a passive reference dye for accurate data normalization in PCR fluorescence systems. Live Cell and Confocal Microscopy: Ideal for high-contrast imaging of mCherry and other red fluorescent proteins. Multiplexed Assays: Deep high OD filter blocking ensures minimal signal bleed-through when combining with other channels (e.g., GFP or FITC). ### Customization and Reliable Supply Chain OPTOStokes understands that system integration requires flexibility. We offer both an extensive inventory of in-stock components and robust support for high-level customization. Custom Dimensions: Standard formats include 1.0mm or 1.1mm thickness, and sizes from 6x6mm up to Ø25mm, ready to be fitted with aluminum mounting rings if required. Spectral Adjustments: Our engineers can provide custom bandpass modifications to CWL (400-850nm) and FWHM (10-60nm) to perfectly match novel dyes or unique laser specifications. Don't compromise on signal quality or lead time. Leverage OPTOStokes' world-class quality assurance and reliable supply for your project. Contact our technical sales team at sales@optofilters.com for immediate inventory checks or to begin designing your custom optical solution today. --- ## CY5 / Alexa Fluor 647 Filter Set | BP624nm Excitation, BP694nm Emission, DM655nm **Type**: Products **URL**: https://www.optofilters.com/FluorescenceFilterSets/222.html **Summary**: Optimize Far-Red imaging with OPTOStokes CY5 / Alexa Fluor 647 filter sets. Features precise BP624nm/BP694nm filters with OD6 blocking for superior signal-to-noise ratio. > **Detail Content:** ![Image: High-Contrast Far-Red Fluorescence Optics for Microscopy](https://www.optofilters.com/uploads/allimg/20251128/1-25112QQT6307.webp) The OPTOStokes CY5 / Alexa Fluor 647 Filter Set is a high-performance optical solution designed for the far-red spectral region. Optimized for CY5, Alexa Fluor 647, and Draq5 dyes, this set minimizes crosstalk and background noise, which is critical for far-red imaging where detector sensitivity can be a limiting factor. By combining steep spectral edges with deep blocking, we ensure maximum signal capture for wide-field fluorescence microscopy and fluorescence detection systems. ### Technical Specifications Engineered with dense, hard optical coating technology, these filters offer exceptional environmental durability and spectral precision. | Component | Model | Center Wavelength (CWL) | FWHM | Transmission | Blocking (OD) | | | Excitation | BP624-40nm | 624 ± 2nm | 40 ± 2nm | Tave > 90% (610-640nm) | ODave ≥ 6 (350-595nm) ODave ≥ 6 (655-860nm) OD > 3 (860-1050nm) | | | Emission | BP694-40nm | 694 ± 2nm | 40 ± 2nm | Tave > 90% (680-708nm) | ODave ≥ 6 (350-664nm) ODave ≥ 6 (730-800nm) OD > 3 (800-1050nm) | | | Dichroic | DM655 | Cut-on ~655nm | N/A | T > 95% (670-700nm) | T < 2% (430-645nm) @ 45° AOI | | ### Primary Applications This red filter set is essential for applications requiring distinct channel separation in multiplex assays: Immunofluorescence: High-contrast imaging of cytoskeletal and nuclear structures labeled with Far-Red dyes. Super-Resolution Microscopy: Suitable for STORM and other localization microscopy techniques using Alexa Fluor 647. Flow Cytometry: Precise bandpass control for the Red Laser (633/640nm) channel. DNA Sequencing: Reliable separation of long-wavelength fluorophores. ### Customization & Manufacturing OPTOStokes provides extensive custom optical filters services to adapt this set to your specific instrument or filter cube requirements. Mechanical Integration: Available in standard sizes (6x6mm, Ø12.5mm, Ø25mm) and custom shapes. We offer anodized aluminum rings for seamless mounting into Nikon, Olympus, Zeiss, and Leica filter sets. Spectral Tuning: We can adjust CWL (400-850nm) and FWHM (10-60nm) to match specific light sources or detectors. Deep Blocking: For high-sensitivity sensors, we ensure high OD filter performance with ODabs ≥ 5 and ODave ≥ 6 suppression across the UV-NIR range (350-800nm). ### Why Choose OPTOStokes? Precision & Availability: We combine world-class coating precision with an extensive in-stock selection. Whether you need a single prototype for R&D or volume production for OEM instruments, we guarantee reliable lead times and consistent quality. Need a tailored optical solution? Contact our engineering team at sales@optofilters.com to request a quote or discuss your specific microscopy requirements. --- ## CY3/TRITC/TAMRA Fluorescence Filter Set | BP530nm Excitation, BP605nm Emission, DM565nm **Type**: Products **URL**: https://www.optofilters.com/FluorescenceFilterSets/221.html **Summary**: Optimize CY3, TRITC, and TAMRA imaging with OPTOStokes fluorescence filter sets. Features BP530nm/BP605nm filters with OD6 blocking for high-contrast microscopy. > **Detail Content:** ![Image: High-Contrast Filter Cube Optics for CY3, TRITC & TAMRA](https://www.optofilters.com/uploads/allimg/20251128/1-25112QQ14G28.webp) The OPTOStokes CY3/TRITC Fluorescence Filter Set is the industry-standard optical solution for visualizing orange-red fluorophores in wide-field fluorescence microscopy. Specifically calibrated for CY3, TRITC (Tetramethylrhodamine), and TAMRA, this set ensures maximum excitation efficiency at 530nm while capturing the peak emission at 605nm. Engineered with hard-coated technology, it delivers exceptional signal brightness and contrast for demanding imaging applications. ### Technical Specifications Designed for durability and spectral precision, our fluorescence microscopy filters feature steep transition edges and deep blocking to eliminate crosstalk from adjacent channels (such as DAPI or FITC). | Component | Model | Center Wavelength (CWL) | FWHM | Transmission | Blocking (OD) | | | Excitation | BP530-40nm | 530 ± 2nm | 40 ± 2nm | Tave > 90% (515-545nm) | ODave ≥ 6 (350-500nm) ODave ≥ 6 (560-800nm) OD > 3 (800-1040nm) | | | Emission | BP605-55nm | 605 ± 2nm | 55 ± 2nm | Tave > 90% (580-630nm) | ODave ≥ 6 (350-570nm) ODave ≥ 6 (645-830nm) OD > 3 (830-1050nm) | | | Dichroic | DM565 | Cut-on ~565nm | N/A | T > 95% (575-700nm) | T < 2% (430-555nm) @ 45° AOI | | ### Primary Applications This 530nm filter based set is optimized for high-contrast imaging in: Fluorescence Microscopy: Routine observation of cytoskeleton structures labeled with TRITC-Phalloidin. FISH Detection: Critical for analyzing specific DNA sequences using orange/red labeled probes in FISH detection assays. Pathology: Identification of pathogens and cellular components using immunofluorescence. Single-Molecule Imaging: Applications requiring high photon collection efficiency for CY3 derivatives. ### Customization & Microscope Compatibility OPTOStokes offers extensive custom optical filters services to ensure our optics fit your specific hardware. Filter Cubes: We can provide filters mounted in anodized aluminum rings to fit standard filter cubes from major microscope manufacturers (Nikon, Olympus, Zeiss, Leica). Spectral Tuning: Custom CWL (400nm-850nm) and FWHM (10nm-60nm) to match novel fluorophores. Background Suppression: For applications requiring extreme darkness, we offer high OD filter options with ODabs ≥ 5 and ODave ≥ 6 across the detector's sensitivity range. ### Why Choose OPTOStokes? Contrast is Key: In fluorescence microscopy, the background is just as important as the signal. Our filter sets utilize superior blocking technologies to ensure that only the specific fluorescence signal reaches the camera or eyepiece. Rapid Fulfillment: Whether you need a standard set for a university lab or volume OEM production, our reliable stock and manufacturing capacity ensure you get the optics you need, when you need them. Upgrade your imaging system today. Contact our optical engineers at sales@optofilters.com for technical diagrams or to request a quote. --- ## CY5.5 Fluorescence Filter Set | BP675nm Excitation, BP725nm Emission, DM700nm Dichroic **Type**: Products **URL**: https://www.optofilters.com/pcr-optical-filters/220.html **Summary**: OPTOStokes CY5.5 Fluorescence Filter Sets (BP675nm Ex/BP725nm Em) feature OD6 blocking for low-noise NIR detection in multiplex qPCR and imaging. > **Detail Content:** The OPTOStokes CY5.5 Fluorescence Filter Set is engineered for optimal performance in the near-infrared (NIR) spectrum, critical for the detection of the CY5.5 fluorophore and similar dyes used in highly sensitive bio-instrumentation. This matched set provides precise 675nm filter excitation and 725nm emission capture, delivering superior signal isolation and high throughput for demanding applications like multiplex qPCR and in vivo imaging. ### Technical Specifications Each component features robust, hard optical coating for spectral stability and includes deep out-of-band blocking to maintain excellent signal-to-noise ratio in multi-channel systems. | Component | Model | Center Wavelength (CWL) | FWHM | Transmission | Blocking (OD) | | | Excitation | BP675-20nm | 675 ± 2nm | 20 ± 2nm | Tave > 90% (670-680nm) | ODave ≥ 6 (350-655nm) ODave ≥ 6 (695-800nm) OD > 3 (800-1050nm) | | | Emission | BP725-30nm | 725 ± 2nm | 30 ± 2nm | Tave > 90% (715-735nm) | ODave ≥ 6 (350-700nm) ODave ≥ 6 (752-830nm) OD > 3 (830-1050nm) | | | Dichroic | DM700 | Cut-on ~700nm | N/A | T > 95% (715-850nm) | T < 2% (430-685nm) @ 45° AOI | | ### High-Reliability NIR Applications This dedicated infrared filter set is essential for maximizing detection sensitivity across numerous life science and diagnostic platforms: Quantitative PCR (qPCR): Utilizing the CY5.5 channel for multi-color gene expression and pathogen detection. In Vivo Imaging: High-penetration NIR detection where minimized auto-fluorescence and crosstalk are critical. Fluorescence Microscopy: Advanced imaging of near-infrared probes. High-Throughput Screening (HTS): Reliable performance in automated diagnostic analyzers. ### Engineering Reliability: Customization & Service OPTOStokes is a trusted partner for engineers and purchasing managers globally. We deliver high-performance optical filter solutions with guaranteed quality and predictable delivery schedules. Flexible Customization: We support modifications to CWL (400nm-850nm) and FWHM (10nm-60nm), along with custom dimensions and thickness (1.0mm, 1.1mm) to fit any system design. Unmatched Blocking: Our core expertise is ODave ≥ 6 blocking across the 350-800nm range, guaranteeing background light rejection. In-Stock & Quality Assurance: Benefit from our extensive selection of ready-to-ship filters, backed by world-class precision manufacturing. Minimize technical risk and streamline your procurement. If your project requires tight tolerances or specialized custom coatings, contact our technical team at sales@optofilters.com for expert support and a fast quotation. --- ## HEX Fluorescence Filter Set | BP530nm Excitation, BP565nm Emission, DM550nm Dichroic **Type**: Products **URL**: https://www.optofilters.com/pcr-optical-filters/219.html **Summary**: Precision HEX Fluorescence Filter Sets (BP530nm Ex/BP565nm Em) from OPTOStokes. Features OD6 blocking for robust signal isolation in multiplex qPCR. > **Detail Content:** ![Image: High-Fidelity Green-Yellow Detection Optics](https://www.optofilters.com/uploads/allimg/20251126/1-251126114010Q3.webp) The OPTOStokes HEX Fluorescence Filter Set is specifically designed for high-performance detection of the HEX fluorophore, a key component in multiplex quantitative Polymerase Chain Reaction (qPCR) and various bio-imaging applications. This set ensures optimal excitation at 530nm and emission capture at 565nm, critical for accurate discrimination in multi-channel systems. Engineered for high signal-to-noise ratio, these filters deliver the precision required by R&D engineers. ### Technical Specifications Our filters utilize hard high precision coating on the substrate, guaranteeing spectral stability and durability. The complete set includes matched excitation and emission bandpass filters, along with a high-efficiency dichroic mirror. | Component | Model | Center Wavelength (CWL) | FWHM | Transmission | Blocking (OD) | | | Excitation | BP530-20nm | 530 ± 2nm | 20 ± 2nm | Tave > 90% (525-535nm) | ODave ≥ 6 (350-510nm) ODave ≥ 6 (550-800nm) OD > 3 (800-1050nm) | | | Emission | BP565-22nm | 565 ± 2nm | 22 ± 2nm | Tave > 90% (560-570nm) | ODave ≥ 6 (200-547nm) ODave ≥ 6 (585-800nm) OD > 3 (800-1050nm) | | | Dichroic | DM550 | Cut-on ~550nm | N/A | Tave > 95% (560-700nm) | Tave < 2% (430-538nm) @ 45° AOI | | ### Key Applications This high-fidelity green light filter set is essential for maximizing signal clarity in complex fluorescence assays, including: Multiplex qPCR: Isolating the HEX signal from adjacent fluorophores like FAM and ROX/Cy3. Fluorescence Microscopy: Imaging of dyes such as VIC, JOE, and Cy2. Flow Cytometry: Green-yellow spectrum detection channel. DNA/RNA Analysis: Instruments requiring accurate PCR detection across multiple channels. ### Customization and Reliable Supply We understand the critical timeframes of product development. OPTOStokes maintains an extensive selection of in-stock components and offers world-class customization for specialized instrument requirements. Wavelength Customization: Adjust CWL from 400nm to 850nm and FWHM from 10nm to 60nm. Extreme Blocking: We guarantee ODave ≥ 6 suppression from 350-800nm for absolute out-of-band rejection. Form Factor Flexibility: Available in standard dimensions (6x6mm, Ø6mm, Ø12mm, Ø25mm) and custom shapes, including mounting options such as aluminum holders. ### Guaranteed Performance for Technical Decision-Makers Engineers choose OPTOStokes for guaranteed quality and controlled lead times. When signal bleed-through or unreliable quality is not an option, our robust high OD bandpass filters provide a solution. Ready to integrate world-class fluorescence filters into your system? Contact us today at sales@optofilters.com for detailed specifications, samples, or to discuss your unique customization project. --- ## ​ROX Fluorescence Filter Set for PCR | BP570nm Excitation, BP612nm Emission, DM590nm **Type**: Products **URL**: https://www.optofilters.com/pcr-optical-filters/218.html **Summary**: Achieve precise ROX dye detection with OPTOStokes fluorescence filter sets. Features BP570nm/BP612nm filters with OD6 blocking for stable qPCR baselines. > **Detail Content:** ![Image: High-Contrast Optical Filters for ROX Reference Dye & qPCR](https://www.optofilters.com/uploads/allimg/20251124/1-251124191030H8.webp) The OPTOStokes ROX Fluorescence Filter Set is meticulously engineered for the detection of ROX (Carboxy-X-Rhodamine) and Texas Red fluorophores. widely utilized as a passive reference dye in quantitative PCR (qPCR) to normalize non-PCR-related fluctuations. This optical set delivers exceptional spectral isolation, ensuring stable baselines and accurate data quantification by suppressing crosstalk from adjacent channels (such as HEX or FAM). ### Technical Specifications Manufactured with dense, hard-coated optical glass, our filters offer superior environmental stability. The set comprises a narrowband excitation filter, a matched emission filter, and a dichroic mirror optimized for 45° incidence. | Component | Model | Center Wavelength (CWL) | FWHM | Transmission | Blocking (OD) | | | Excitation | BP570-20nm | 570 ± 2nm | 20 ± 2nm | Tave > 90% (565-575nm) | ODave ≥ 6 (350-550nm) ODave ≥ 6 (591-800nm) ODave > 3 (800-1050nm) | | | Emission | BP612-20nm | 612 ± 2nm | 20 ± 2nm | Tave > 90% (607-617nm) | ODave ≥ 6 (350-591.5nm) ODave ≥ 6 (632-800nm) OD > 3 (800-1050nm) | | | Dichroic | DM590 | Cut-on ~590nm | N/A | Tave > 95% (625-850nm) | Tave < 2% (390-580nm) @ 45° AOI | | ### Primary Applications This red filter set is a critical component for high-precision bio-instrumentation: Real-Time PCR (qPCR): Standard channel for ROX reference dye normalization. Fluorescence Microscopy: High-contrast imaging of Texas Red and similar orange-red fluorophores. DNA Sequencing: Precise separation of dye-terminator signals. Pathogen Detection: Reliable PCR fluorescence optics for multiplex diagnostic platforms. ### Customization & Manufacturing Capabilities OPTOStokes offers comprehensive custom optical filters services to fit your instrument's unique optical path and mechanical housing. Spectral Range: CWL selectable from 400nm to 850nm; FWHM from 10nm to 60nm. Deep Blocking: We ensure ODabs ≥ 5 and ODave ≥ 6 across the UV-NIR spectrum (350-800nm) for critical high OD filter requirements. Dimensions & Mounting: Standard sizes include 6x6mm, Ø6mm, Ø12mm, and Ø25mm. We provide anodized aluminum rings and custom shapes upon request. ### Why Choose OPTOStokes? Signal Integrity: In multiplex PCR, separating the ROX signal from background noise is paramount. Our bandpass filter technology utilizes steep edges to minimize spectral overlap. Reliable Supply Chain: From rapid prototyping to volume production, we maintain extensive stock and robust manufacturing processes to guarantee on-time delivery. Optimizing your optical detection system? Contact our engineering team at sales@optofilters.com for technical support or to request a quote for your custom filter sets. --- ## FAM Fluorescence Filter Set | BP470nm Excitation, BP520nm Emission, DM505nm **Type**: Products **URL**: https://www.optofilters.com/pcr-optical-filters/217.html **Summary**: Optimize FAM/SYBR Green detection with OPTOStokes fluorescence filter sets. Features BP470nm excitation and BP520nm emission with OD6 blocking for precision PCR. > **Detail Content:** ![Image: High-Contrast FAM/FITC Filters with OD6 Blocking for PCR Systems](https://www.optofilters.com/uploads/allimg/20251126/1-251126101J3553.webp) The OPTOStokes FAM Fluorescence Filter Set is the industry standard for detecting FAM, FITC, and SYBR Green dyes in molecular diagnostics. Engineered for high-throughput PCR fluorescence systems, this set balances maximum transmission with ultra-deep blocking. By isolating the 470nm blue excitation line and the 520nm green emission signal, we ensure exceptional signal-to-noise ratios essential for low-copy-number detection. ### Technical Specifications Our filters utilize hard-coated technology to deliver environmental durability and consistent spectral performance. The set includes a precise blue bandpass filter for excitation and a matched green emission filter. | Component | Model | Center Wavelength (CWL) | FWHM | Transmission | Blocking (OD) | | | Excitation | BP470-30nm | 470 ± 2nm | 30 ± 2nm | Tave > 90% (460-480nm) | ODave ≥ 6 (350-440nm) ODave ≥ 6 (497.5-800nm) OD > 3 (800-1050nm) | | | Emission | BP520-20nm | 520 ± 2nm | 20 ± 2nm | Tave > 90% (515-525nm) | ODave ≥ 6 (350-500nm) ODave ≥ 6 (540-800nm) OD > 3 (800-1050nm) | | | Dichroic | DM505 | Cut-on ~505nm | N/A | T > 95% (515-745nm) | T < 2% (380-495nm) @ 45° AOI | | ### Critical Applications This optical configuration is optimized for instruments requiring high optical clarity and background suppression: Real-Time PCR (qPCR): Standard channel for FAM and SYBR Green assays. Fluorescence Microscopy: Ideal for GFP (Green Fluorescent Protein) and FITC imaging. DNA Sequencing: Precision 520nm filter separation for genetic analysis. Point-of-Care Devices: Compact, reliable optics for portable diagnostics. ### Customization & Engineering Support OPTOStokes provides flexible custom optical filters services to adapt to your specific instrument design. Spectral Tuning: We can adjust CWL from 400nm to 850nm and FWHM from 10nm to 60nm. Deep Blocking: Our high OD filter capabilities ensure ODabs ≥ 5 and ODave ≥ 6 across the UV-NIR range (350-800nm). Mechanical Integration: Standard thickness (1.0mm/1.1mm) and sizes (6x6mm, Ø6mm, Ø12mm, Ø25mm). Anodized aluminum rings are available for easy mounting. ### Why Partner with OPTOStokes? Eliminate Crosstalk: In multi-channel PCR, signal bleed-through ruins data. Our filters feature steep edges and OD6 blocking to guarantee channel isolation. From Prototype to Production: Whether you need a single verification set or volume production of filter sets, our inventory and agile manufacturing ensure reliable lead times. Upgrade your optical system today. Contact our technical team at sales@optofilters.com to request samples or discuss your custom optical design requirements. --- ## CY5 Fluorescence Filter Set | BP675nm Excitation, BP725nm Emission, DM700nm **Type**: Products **URL**: https://www.optofilters.com/pcr-optical-filters/216.html **Summary**: Precision CY5 fluorescence filter set (BP675 Ex, BP725 Em) featuring OD6 blocking for superior signal isolation in qPCR and NIR imaging. World-class quality and custom options. > **Detail Content:** ![Image: high OD bandpass filter](https://www.optofilters.com/uploads/allimg/20251124/1-25112419102U53.webp) The **OPTOStokes CY5 Fluorescence Filter Set** is engineered for superior signal resolution in the deep red to Near-Infrared (NIR) spectrum, crucial for multiplexing assays in qPCR, flow cytometry, and advanced imaging. Optimized for the CY5 fluorophore, this set delivers high transmission efficiency and exceptional blocking (Optical Density > 6), effectively isolating the target signal from background noise and unwanted excitation energy. ### Technical Specifications for High-Contrast Performance Each filter is fabricated using high-stability thin-film coatings, offering precise spectral control for demanding medical and research instrumentation. | Component | Model / Type | Center Wavelength (CWL) | FWHM (Bandwidth) | Transmission | Blocking (OD) | | | Excitation Filter | BP675-20nm | 675nm ± 2nm | 20nm ± 2nm | Tave >90% (670-680nm) | ODave > 6 (350-655nm, 695-800nm) | | | Emission Filter | BP725-30nm | 725nm ± 2nm | 30nm ± 2nm | Tave >90% (715-735nm) | ODave > 6 (350-700nm, 752-830nm) | | | Dichroic Mirror | DM700 | Cut-on 700nm (nominal) | N/A | Tave > 95% (715-850nm) | Block < 2% (430-685nm) | | ### Primary Applications The tight spectral tolerances and deep blocking make this filter set ideal for high-sensitivity detection in: Quantitative PCR (qPCR): Robust detection channel for CY5 and related dyes in multi-channel systems. Fluorescence Imaging: NIR filter applications demanding clear signal separation in the deep red spectrum. Flow Cytometry: Precision sorting and analysis of cells tagged with long-wavelength fluorophores. Biomedical Sensing: High-reliability optical path for PCR detection and diagnostics. ### The OPTOStokes Advantage: Customization & Quality We offer flexible manufacturing to meet specialized optical system requirements. Our custom optical filters service covers the entire spectrum of high-performance optics: Custom Parameters: Adjustments to CWL (400nm-850nm), FWHM (10nm-60nm), and Transmission (Tave > 90%). Deep Blocking Guarantee: Guaranteed absolute Optical Density (ODabs) > 5 and average ODave > 6 blocking across the critical 350nm-800nm range. Physical Specs: Standard thicknesses of 1.0mm/1.1mm. Available dimensions include 6x6mm, diameter 6mm, 12mm, and 25mm. Custom shapes and aluminum mounting rings are available upon request. ### Reliability for Mission-Critical Systems Relying on standard stock filters can lead to compromise in data integrity, especially in the NIR range where noise is prevalent. Our fluorescence filters provide the guaranteed high-performance, quality, and reliable lead times you need. Stop compromising on signal quality; leverage our **World-Class Precision**. Ready to integrate high-performance high OD filter sets into your instrument? Contact our specialized engineers directly at sales@optofilters.com for technical consultation or rapid quote requests. --- ## CY3 PCR Fluorescence Bandpass Filter Set | BP543nm, BP585nm, DM565, 1.0mm Thickness, High OD **Type**: Products **URL**: https://www.optofilters.com/pcr-optical-filters/215.html **Summary**: Explore OPTOStokes CY3 PCR fluorescence filter sets for precise excitation and emission. High OD blocking, full customization, and reliable stock. Contact sales@optofilters.com. > **Detail Content:** ![Image: custom PCR filter set](https://www.optofilters.com/uploads/allimg/20251124/1-25112419102L10.webp) OPTOStokes CY3 Fluorescence Bandpass Filter Set delivers robust signal performance for PCR and gene analysis applications. Featuring precision-engineered excitation and emission filters with deep out-of-band blocking and high transmission, this set supports accurate and repeatable fluorescence quantification in fast-paced laboratory environments. ### Technical Specifications | Item | Excitation Filter BP543-20nm-1.0mm | Emission Filter BP585-20nm-1.0mm | Dichroic Mirror DM565-1.0mm | | | Transmission | 538-548 nm, average transmission above 90 percent | 580-590 nm, average transmission above 90 percent | 575-700 nm, transmission above 95 percent | | | Center Wavelength (CWL) | 543 ±2 nm | 585 ±2 nm | - | | | Full Width at Half Maximum (FWHM) | 20 ±2 nm | 20 ±2 nm | - | | | Blocking Range | 350-523 nm, 563-800 nm, 800-1050 nm, average optical density above 6 (OD above 5), OD above 3 for 800-1050 nm | 350-565 nm, 602.5-800 nm, 800-1050 nm, average optical density above 6 (OD above 5), OD above 3 for 800-1050 nm | 430-555 nm, transmission below 2 percent | | | Angle of Incidence (AOI) | 0 degree | 0 degree | 45 degrees | | | Thickness | 1.0 mm | 1.0 mm | 1.0 mm | | ### Applications Tailored for PCR detection and fluorescence detection, the CY3 filter set is perfect for clinical diagnostics, genetic sequencing, and laboratory equipment upgrades. Its precision ensures reliable performance in rapid testing workflows and automated gene analysis platforms. ### Customization & Service All filters support full customization of center wavelength, FWHM, size, and OD levels. Options include standard round, square, or custom shapes, with alumina ring available upon request. OPTOStokes guarantees extensive in-stock selection, professional engineering support, and reliable lead times for every order. ### Pain Points & CTA Struggling with inconsistent supply, extended procurement cycles, or insufficient technical advice? OPTOStokes provides expert technical guidance, rapid customization, and robust stock availability. Contact sales@optofilters.com or visit www.optofilters.com for tailored solutions. --- ## ROX Fluorescence Filter Set for PCR | BP570nm Excitation, BP612nm Emission, DM590nm **Type**: Products **URL**: https://www.optofilters.com/pcr-optical-filters/214.html **Summary**: High OD ROX fluorescence optical filters for PCR detection. Precision transmission, reliable blocking, fast customization. Contact OPTOStokes today. > **Detail Content:** In the precision-demanding field of molecular diagnostics, signal clarity is paramount. The OPTOStokes ROX Fluorescence Filter Set is engineered specifically for Real-Time PCR (qPCR) systems and fluorescence microscopy, optimized to capture the specific spectral signature of ROX dyes. By combining steep spectral edges with deep blocking capabilities, this set minimizes crosstalk and maximizes the signal-to-noise ratio, ensuring reliable data for critical R&D and diagnostic applications. ### Technical Specifications Our filters utilize hard-coated optical glass technology to ensure environmental stability and long-term performance. The set includes a matched Excitation Filter, Emission Filter, and Dichroic Mirror. | Component | Model / Type | Center Wavelength (CWL) | FWHM (Bandwidth) | Transmission | Blocking (OD) | | | Excitation | BP570-20nm | 570nm ± 2nm | 20nm ± 2nm | Tave > 90% (565-575nm) | OD > 6 (350-550nm) OD > 6 (591-800nm) | | | Emission | BP612-20nm | 612nm ± 2nm | 20nm ± 2nm | Tave > 90% (607-617nm) | OD > 6 (350-591.5nm) OD > 6 (632-800nm) | | | Dichroic Mirror | DM590 | Cut-on ~590nm | N/A | T > 95% (625-850nm) | Reflects < 580nm | | ### Key Applications Designed for high-sensitivity optical systems, this filter set is widely deployed in: Quantitative PCR (qPCR): Standard reference dye detection and multiplexing. Fluorescence Microscopy: High-contrast imaging of red-emitting fluorophores. DNA Sequencing: Precision signal separation for genetic analysis. Biomedical Instrumentation: PCR detection devices requiring compact, high-performance optics. ### Customization & Engineering Support At OPTOStokes, we understand that standard sizes do not fit every optical bench. We offer extensive custom optical filters services to match your mechanical constraints. Wavelength Options: CWL selectable from 400nm to 850nm; FWHM adjustable from 10nm to 60nm. Substrate & Size: Standard sizes include 6x6mm, diameter 6mm, 12mm, and 25mm. Custom shapes (square, round, irregular) and anodized aluminum rings are available. Optical Density: We can achieve ODabs ≥5 and ODave ≥ 6 for critical sensing applications requiring a high OD filter. ### Why Choose OPTOStokes? Eliminate Signal Noise: Our fluorescence filters feature blocking depths greater than OD6, effectively suppressing excitation light bleed-through and ensuring that only the target fluorescence signal reaches the detector. Rapid Prototyping to Volume: Whether you need a single prototype for validation or 10,000 units for production, our stock inventory and agile manufacturing ensure on-time delivery. Need a tailored optical solution? Contact our engineering team at sales@optofilters.com to discuss your specific requirements for bandpass filter specifications and system integration. --- ## LP530 Longpass Filter | 1.1mm, 535–1100nm Pass, 530nm Edge **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/210.html **Summary**: LP530 longpass filter, 1.1mm. Blocks 350–510nm, >90% T at 535–1100nm. Ideal for blue/green block, 530nm edge fluorescence, imaging, and OEM integration. > **Detail Content:** ### The LP530-1.1mm longpass filter is engineered for precise separation at the 530nm edge, ensuring high transmission greater than 90% from 535–1100nm and strong blocking ( --- ## ​LP500 Longpass Filter | 1.1mm, 510–1100nm Pass, 500nm Edge **Type**: Products **URL**: https://www.optofilters.com/DichroicMirror/209.html **Summary**: LP500 longpass filter, 1.1mm. Blocks 350–490nm, >90% T at 510–1100nm. Ideal for blue block, 500nm edge fluorescence, microscopy, and OEM optical builds. > **Detail Content:** ### The LP500-1.1mm longpass filter is engineered to provide precise spectral separation at the 500nm edge for high-clarity fluorescence, microscopy, and laser/LED systems. Transmission exceeds 90% from 510–1100nm, while blue-green light below 500nm is efficiently blocked ( --- ## DM700 Dichroic Beamsplitter | 1.1mm, 45° AOI, 715–900nm Pass **Type**: Products **URL**: https://www.optofilters.com/DichroicMirror/208.html **Summary**: DM700 dichroic beamsplitter, 45° AOI, 1.1mm. >95% T @715–900nm, <1% T @350–675nm. Ideal for laser, imaging, NIR fluorescence. Custom cuts/fast OEM. > **Detail Content:** ### The DM700-1.1mm-AOI45° dichroic beamsplitter is engineered for advanced multi-wavelength, NIR, and visible-channel separation. With transmission greater than 95% from 715–900nm, blocking at less than 1% from 350–675nm, and a precise 45° angle of incidence (AOI), this optic is ideal for dual-laser, NIR fluorescence, and multi-color microscopy platforms requiring ultra-flat transmission and crosstalk-free channel division. ### Technical Specifications | Parameter | Specification | | | Transmission Range | 715–900nm at T greater than 95% | | | Blocking Range | 350–675nm at T less than 1% | | | AOI (Angle of Incidence) | 45° | | | Substrate Thickness | 1.1mm | | | Coating Type | Hard ion-assisted multi-layer dielectric | | ### Key Performance Features This dichroic beamsplitter delivers near-infrared (NIR) and far-red channel separation with >95% transmission in the critical 715–900nm band—ideal for Cy5.5, Alexa 700, or 785/808nm laser lines. The broad --- ## DM647 Dichroic Beamsplitter | 1.1mm, 45° AOI, 660-850nm Pass **Type**: Products **URL**: https://www.optofilters.com/DichroicMirror/207.html **Summary**: DM647 dichroic beamsplitter, 45° AOI, 1.1mm. >95% T @660–850nm, <1% T @400–635nm. Optimized for laser/fluorescence, low cross-talk, fast OEM supply. > **Detail Content:** ### The DM647-1.1mm-AOI45° dichroic beamsplitter is engineered for multi-wavelength fluorescence and laser applications demanding precise wavelength separation, steep edge transition, and robust integration. With >95% transmission from 660-850nm, --- ## DAPI BP460nm Bandpass Filter | FWHM 55nm, OD6 Blocking, Dual-Coat **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/206.html **Summary**: DAPI BP460 bandpass, 55nm FWHM, OD6. For high-contrast blue fluorescence and DAPI imaging, dual-coat, ultra-low crosstalk for advanced microscopy. Get datasheet/custom. > **Detail Content:** ### The DAPI-BP460-55nm-OD6 bandpass filter delivers exceptional blue-channel fluorescence control for DAPI, Hoechst, and blue-excited fluorophores. With a 55nm full width at half maximum (FWHM) centered at 460nm and average transmission greater than 90% across the 440-480nm window, it ensures unmatched signal strength for cell and tissue nuclear staining. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 460nm ± 2nm | | | Transmission Range | 440-480nm at average T greater than 90% | | | Full Width at Half Maximum (FWHM) | 55nm ± 2nm | | | Blocking Range | 200-420nm at average OD greater than 6 (minimum OD greater than 5);        520-700nm at average OD greater than 6 (minimum OD greater than 5);        700-1000nm at OD greater than 3 | | | Blocking Depth | OD6 (deep blocking), multi-zone controlled | | | Incident Angle | 0° | | | Coating | Dual-side hard ion-assisted deposition | | | Reference | DAPI-BP460-55nm-OD6 | | ### Key Performance Features This bandpass filter sets the benchmark for DAPI and blue channel imaging—combining OD6 deep blocking outside the 440-480nm transmission range with dual-side coatings for maximum crosstalk suppression in advanced multi-channel fluorescence microscopy. Average T greater than 90% ensures robust DAPI, Hoechst, or blue dye signal push-through for high-magnification, low-background imaging. OD6 blocking at UV and visible red/far-red zones provides negligible bleed-through, even when exposed to broad-spectrum or high-intensity illumination sources. ### Applications - DAPI/Hoechst nuclear fluorescence imaging: Immunofluorescence, genetic and cell biology, pathology, developmental studies. - High-parameter multi-channel microscopy: OD6 levels eliminate crosstalk in advanced 4-7 color setups. - Laser and LED widefield/confocal platforms: Robust for high SNR, low autofluorescence, and artifact-free scanning. - Diagnostics and automation: Consistent quality for cytometry, histology, and high-throughput plate readers. ### Customization & Service OPTOStokes delivers standard and custom specs: size, shape, and mounting. ISO 9001:2015, data-driven QC, fast prototyping for OEM, research, or clinical use. Datasheets and technical help—email sales@optofilters.com or visit www.optofilters.com. ### Pain Points & CTA Difficulty with blue channel crosstalk or signal loss? Switch to BP460-55nm-OD6 for OD6 blocking, dual-surface coatings, and ultra-high consistency. Contact us for tech solutions, samples, or integration guidelines. --- ## BP940nm Bandpass Filter | FWHM 25nm, Thickness 0.8mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/205.html **Summary**: BP940 NIR bandpass filter, 25nm FWHM, 0.8mm. High transmission/low noise for 940nm laser/LED sensing, portable and OEM NIR applications. Fast customization. > **Detail Content:** ### The BP940-25nm-0.8mm bandpass filter is engineered for compact, high-precision near-infrared detection and imaging. Featuring a 25nm full width at half maximum (FWHM) and centered at 940nm, this filter delivers transmission greater than 90% in the 935-945nm window while blocking 350-1100nm at transmission less than 1%. Its 0.8mm thin profile is optimized for OEM modules and portable or stacked detector systems. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 940nm ± 2nm at T greater than 90% | | | Transmission Range | 935-945nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 25nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Substrate Thickness | 0.8mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Reference | 20206771 | | ### Key Performance Features This NIR filter achieves strong signal throughput and superior crosstalk suppression for 940nm LED, laser, and imaging systems. The 25nm moderate bandwidth collects more photons for better SNR in time-of-flight, LIDAR, or fluorescence workflows, while the thin construction supports multi-filter stacks in compact packages. Hard ion-assisted coatings ensure reliable use in tough environments and long-term field operation. ### Applications - Laser and LED sensors: 940nm ToF/3D/Machine vision, facial recognition, mobile proximity modules. - Medical and wearables: Pulse oximeters, health analytics, photoplethysmography, portable diagnostics. - OEM instrumentation: High-density detectors, smart home, IoT modules, IR remote control. - Scientific and industrial NIR: Flow cytometers, NIR fluorescence, quality/process control. ### Customization & Service OPTOStokes offers precision tuning (CWL, FWHM), size/geometry, and scalable production for OEMs. Filters meet ISO 9001:2015 and ship rapidly. For quotes, drawings, and technical design advice, contact sales@optofilters.com or www.optofilters.com. ### Pain Points & CTA Space-constrained, multi-channel, or SNR-limited? BP940-25nm-0.8mm maximizes signal in tight spaces—ask us for quick samples, expert NIR optics support, or rapid OEM scaling. --- ## ​BP905nm Bandpass Filter | FWHM 26nm, High Precision NIR **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/204.html **Summary**: BP905 NIR bandpass filter, 26nm FWHM, high blocking. Optimized for 905nm laser, LED detection, NIR imaging and OEM integration. Stock and custom support. > **Detail Content:** ### The BP905-26nm bandpass filter offers high-performance near-infrared signal selection for demanding imaging, sensing, and OEM platforms. Centered at 905nm with a 26nm full width at half maximum (FWHM), this filter delivers transmission greater than 90% from 900-910nm and blocks from 350-1100nm at transmission less than 1%. It is engineered for robust signal isolation and long-term optical stability—ideal for integration in advanced photonics and detection systems. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 905nm ± 2nm at T greater than 90% | | | Transmission Range | 900-910nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 26nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Reference | 20211615 | | ### Key Performance Features This NIR filter provides efficient, selective detection of 905nm laser, LED, or fluorescence signals while eliminating background crosstalk from visible and broad NIR sources. The balanced 26nm FWHM is ideal for maximizing signal in time-resolved measurements, outdoor LIDAR, and biomedical imaging where sharp cut-offs and high throughput are essential. Coated for long-term durability, it supports operation in both laboratory and rugged industrial environments. ### Applications - Laser rangefinding and LIDAR: Optimized for 905nm lasers to ensure precise spatial mapping and obstacle detection. - NIR imaging and fluorescence: Fast signal collection for diagnostic instruments, flow cytometers, and medical analyzers. - LED/photodiode detection: Used as a front-end filter for camera/sensor protection and IR intensity control in OEM modules. - Scientific R&D and automation: High signal-to-noise ratio for spectroscopy, quality control, robotics, and machine vision. ### Customization & Service OPTOStokes offers custom geometry support, CWL/FWHM tuning, and OEM program options. All filters meet ISO 9001:2015 standards and ship rapidly from stock when available. Engineering and application support are available for design integration—contact sales@optofilters.com or www.optofilters.com for fast quotes and expert consultation. ### Pain Points & CTA Challenged with unwanted IR/visible noise, or signal loss in NIR sensing? BP905-26nm delivers sharp blocking and strong throughput for your next system build. Consult our experts for design advice or quick delivery. --- ## ​BP890nm Bandpass Filter | FWHM 90nm, Thickness 0.55mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/203.html **Summary**: BP890 ultra-wide NIR bandpass filter, 90nm FWHM, 0.55mm. High signal for IR/LED applications, compact OEM systems, and medical NIR imaging. Rapid delivery available. > **Detail Content:** ### The BP890-90nm-0.55mm bandpass filter is designed for maximum signal collection and compactness in the near-infrared and infrared range. Centered at 890nm with a remarkably wide 90nm full width at half maximum (FWHM), this filter offers transmission greater than 90% from 855-935nm and blocks 400-1100nm at transmission less than 1%. Its ultra-thin 0.55mm substrate is ideal for modern multi-filter wheels, handheld OEM devices, and lightweight NIR imaging systems. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 890nm ± 3nm at T greater than 90% | | | Transmission Range | 855-935nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 90nm ± 5nm | | | Blocking Range | 400-1100nm at T less than 1% | | | Substrate Thickness | 0.55mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Reference | 20211940 | | ### Key Performance Features This NIR filter excels at collecting broad emission and enhancing SNR in challenging detection environments. The ultra-wide 90nm bandwidth maximizes signal from broad-spectrum NIR/LEDs and multipeak light sources. The 0.55mm thickness is one of the thinnest on the market, ideal for compact filter wheels, stacked OEM assemblies, and any space-limited system design. The filter delivers stable optical performance, low background, and robust environmental resistance for field, clinical, or lab applications. ### Applications - High-throughput NIR/IR fluorescence imaging: Medical and scientific platforms where signal collection is critical. - Broad-spectrum LED detection: Perfect for photodiode, CCD, or CMOS sensor integration. - Compact OEM instrumentation: Modular analyzers, hand-held meters, smart diagnostic devices. - Laser and IR communication: Reliable passband for pulse or continuous sources in telecom/defense. ### Customization & Service OPTOStokes offers diameter/shape customizations, alternative bandwidth tuning, large-scale OEM supply, and full certified QC to ISO 9001:2015. Rapid-ship available on standard cuts and support for unique integration needs—contact us at sales@optofilters.com or visit www.optofilters.com for RFQs and engineering help. ### Pain Points & CTA Need more signal with less bulk? Can’t fit standard filters in your compact NIR modules? BP890-90nm-0.55mm boosts throughput for today’s smallest devices. For design support, sample requests, or fast quotation, reach out to our technical team at your convenience. --- ## ​BP810nm Bandpass Filter | FWHM 20nm, Thickness 0.7mm **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/202.html **Summary**: BP810 ultra-thin bandpass filter, 20nm FWHM, 0.7mm profile. For compact NIR/IR medical and laser detection. High signal, tight blocking, fast OEM delivery. > **Detail Content:** ### The BP810-20nm-0.7mm bandpass filter is designed for ultra-compact near-infrared applications where precision, thinness, and high performance are paramount. Centered at 810nm with a 20nm full width at half maximum (FWHM), this filter delivers transmission greater than 90% across the 808-815nm band and blocks 350-1100nm at transmission less than 1%. Its ultra-thin 0.7mm substrate is ideal for modern OEM optical assemblies, multi-filter stacks, and portable or weight-sensitive devices. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 810nm ± 3nm | | | Transmission Range | 808-815nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 20nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Substrate Thickness | 0.7mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20217501 | | ### Key Performance Features This NIR filter combines a 20nm FWHM for precise channel selection with exceptional out-of-band blocking, guaranteeing high signal-to-noise in fluorescence, LED, and laser-based diagnostics. The 0.7mm profile significantly reduces overall system height and optical path, enabling denser filter packs or lighter handheld instruments. The coating process provides long-term environmental stability for clinical, research, or field conditions. ### Applications - Compact and OEM medical diagnostics: Portable NIR/IR analyzers, blood oximeters, or multi-analyte POC systems. - NIR fluorescence imaging and confocal microscopy: Efficient Cy7, IRDye 800 detection with reduced autofluorescence. - Laser/LED sensing: 810nm diode/IR laser signal extraction and background suppression. - High-density filter stacks: Minimal focus shift, multi-channel designs, custom OEM integration. ### Customization & Service OPTOStokes supports custom geometries (circular, square, specialty), FWHM/CWL tuning, enhanced coating specs, and OEM volumes. Filters are ISO 9001:2015 certified, with rapid shipment for standard options. Technical support and application engineering are available—contact sales@optofilters.com or visit www.optofilters.com for quotes or design consultation. ### Pain Points & CTA Have challenges with system bulk, low NIR SNR, or multi-filter alignment? BP810-20nm-0.7mm solves compact integration and background suppression. Contact us for fast customization, tech guidance, or logistics support. --- ## ​BP785nm Bandpass Filter | FWHM 23nm, Thickness 2.0mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/201.html **Summary**: BP785 NIR bandpass filter, 23nm FWHM, 2.0mm. High signal for Cy7, IRDye 800. Optimized for deep tissue imaging, reliable for advanced research or OEM. Custom/fast. > **Detail Content:** ### The BP785-23nm-2.0mm bandpass filter is optimized for near-infrared fluorescence imaging and analytical detection. Offering a robust 23nm full width at half maximum (FWHM) centered at 785nm, transmission greater than 90% across the 780-795nm passband, and deep blocking from 350-1100nm at transmission less than 1%, this filter maximizes signal strength while preserving channel purity. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 785nm ± 3nm at T greater than 90% | | | Transmission Range | 780-795nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 23nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Substrate Thickness | 2.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | ### Key Performance Features This NIR filter enables efficient capture of Cy7, IRDye 800CW, and similar markers, ensuring robust fluorescence signal for deep tissue, in vivo, and automated imaging. The 23nm FWHM delivers an optimal balance between specificity and strong throughput—well-suited to biodistribution studies, low-light conditions, or high-throughput multi-color platforms. The 2.0mm thickness provides excellent planarity and thermal stability for large system integration, maintaining reliable spectral properties even under varying environmental and illumination conditions. The coating ensures long-term durability and low background in demanding research or OEM settings. ### Applications - Near-infrared deep tissue and live animal imaging: Enhanced detection of Cy7 and IRDye 800, ideal for preclinical, surgical, or organ-level studies. - High-throughput NIR plate readers and automated assays: Increased signal collection for clinical diagnostics and pharmaceutical screens. - Multi-channel confocal/widefield/microscopy: Consistent spectral separation for high-parameter fluorescence detection. - OEM and system integrators: The 2.0mm filter is robust for custom assemblies and hybrid system installations. ### Customization & Service OPTOStokes supports diameter/shape customization, CWL and FWHM tuning for novel dyes, and full QC to ISO 9001:2015. Rapid-ship on core models. Expert guidance for advanced integration—reach us at sales@optofilters.com or www.optofilters.com for quotes or tech support. ### Pain Points & CTA Struggling with weak NIR signal, challenging tissue backgrounds, or filter stability issues? BP785-23nm-2.0mm delivers high-throughput performance, low noise, and rugged reliability. Contact us for custom solutions, application notes, and fast order confirmation. --- ## BP780nm Bandpass Filter | FWHM 34nm, Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/200.html **Summary**: BP780 wide NIR bandpass filter, 34nm FWHM, 1.1mm. Maximizes IRDye 800 and Cy7 signal in deep tissue and rapid multiplexed imaging. Fast delivery, custom shapes. > **Detail Content:** ### The BP780-34nm-1.1mm bandpass filter is engineered for high-efficiency detection in the near-infrared region, combining a wide 34nm full width at half maximum (FWHM) centered at 780nm with a compact 1.1mm substrate. Offering transmission greater than 90% across the robust 770-790nm window, this filter delivers significant throughput for IRDye 800CW, Cy7, and other deep NIR fluorophores, making it ideal for demanding deep-tissue, in vivo, or multiplexed imaging. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 780nm ± 3nm at T greater than 90% | | | Transmission Range | 770-790nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 34nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Substrate Thickness | 1.1mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | ### Key Performance Features This NIR filter achieves a remarkable balance of signal strength and selectivity. The broad 34nm passband captures full emission spectra of IRDye 800, Cy7, and other NIR markers, perfect for high-throughput screening or low-signal applications. Peak throughput above 90% allows photon-limited or rapid dynamic scenarios—multiplexed imaging, in vivo biodistribution, and deep-tissue microscopy—where speed and sensitivity drive performance. The deep blocking from 350-1100nm ensures clean fluorescence detection, suppressing both visible and far-infrared crosstalk. Optimized at 780nm, this filter exploits the NIR transparency window for exceptional tissue penetration, minimal autofluorescence background, and reliable quantitative imaging. ### Applications - Multiplexed in vivo imaging: Maximize Cy7 and IRDye 800CW emission separation in small animal and organ-level systems. - Rapid/high-throughput NIR screening assays: Clinical, pharmaceutical, and point-of-care platforms seeking strong signal and low noise. - Deep tissue microscopy: Confocal, widefield, and IVIS systems capturing weak NIR signals in thick samples or living organisms. - Automated filter wheels: The 1.1mm thickness fits dense filter assemblies with high alignment repeatability and robustness. ### Customization & Service OPTOStokes offers complete format/geometry customization for the BP780-34nm-1.1mm—circular, square, or custom contours. Center wavelength and bandwidth can be adjusted to match specialty dyes, with OEM and expedited delivery support. All filters are manufactured to ISO 9001:2015 quality standards, with rapid-ship stock available for core options. ### Pain Points & CTA Struggling with low NIR signal, crosstalk in multi-color in vivo studies, or filter stack constraints? The BP780-34nm-1.1mm addresses these with wide passband, deep blocking, and a thin, robust form factor. For technical advice, quotes, or fast delivery confirmation, contact sales@optofilters.com or visit www.optofilters.com. --- ## BP780nm Bandpass Filter | FWHM 23nm, Thickness 2.0mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/199.html **Summary**: BP780 NIR bandpass filter with 23nm FWHM and 2.0mm substrate. Ideal for Cy7, IRDye 800 detection. Balanced NIR performance. Request a quote today. > **Detail Content:** ### BP780nm Bandpass Filter | FWHM 23nm, Thickness 2.0mm The BP780-23nm-2.0mm bandpass filter is engineered for near-infrared fluorescence applications demanding optimal performance in the tissue transparency window. This versatile bandpass filter features a 23nm full width at half maximum (FWHM) centered at 780nm with transmission greater than 90% across the 775-790nm passband, providing ideal performance for Cy7, IRDye 800CW, and other near-infrared emitting fluorophores. With comprehensive blocking from 350-1100nm at transmission less than 1%, this filter ensures clean signal isolation in multi-channel near-infrared imaging systems. The robust 2.0mm substrate thickness provides enhanced mechanical stability, superior thermal management, and high laser damage threshold for demanding applications. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers consistent performance for deep tissue imaging, in vivo diagnostics, and biomedical research applications. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 780nm ± 3nm at T greater than 90% | | | Transmission Range | 775-790nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 23nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 2.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20221313 | | ### Key Performance Features This NIR filter achieves excellent spectral performance through its balanced 23nm bandwidth design. The FWHM provides an optimal balance between wavelength selectivity and light collection efficiency, making it suitable for applications where both spectral purity and signal strength are important. Peak transmission exceeding 90% across the 775-790nm range ensures maximum photon throughput while maintaining adequate separation from shorter wavelength NIR channels at 700-760nm and longer wavelength channels at 800-850nm. The precisely controlled passband efficiently captures emissions from Cy7 (emission maximum at 767nm with significant emission extending into the 775-790nm range), IRDye 800CW (emission peak at 794nm), and other NIR fluorophores used in deep tissue and in vivo imaging. The 780nm spectral region represents a critical point in the near-infrared optical window where biological tissue exhibits excellent transparency, minimal absorption from hemoglobin and water, and virtually absent autofluorescence. The 23nm bandwidth collects sufficient fluorophore emission to maximize signal-to-noise ratios while preventing excessive spectral overlap with adjacent channels. Comprehensive blocking performance with transmission below 1% (optical density greater than 2) from 350-1100nm effectively suppresses all visible wavelength channels, completely rejects shorter NIR channels, and eliminates far-infrared detector noise. This deep rejection ensures clean fluorescence detection even in challenging in vivo imaging scenarios with complex spectral backgrounds. The robust 2.0mm substrate thickness provides enhanced mechanical stability compared to thinner alternatives, facilitating secure mounting in precision optical assemblies. The increased thickness improves thermal dissipation, reducing temperature-induced wavelength shifts during extended operation or high-power laser applications. The substantial substrate also ensures high laser damage threshold, making this filter suitable for intense NIR laser systems used in advanced imaging modalities. ### Applications The BP780-23nm-2.0mm filter excels across diverse near-infrared fluorescence applications in the optimal tissue window: In Vivo Whole-Animal Imaging: Preclinical imaging systems for small animal research utilize the 780nm window for deep tissue penetration and low background imaging. The BP780 filter captures Cy7 and IRDye 800CW emissions with excellent sensitivity, enabling tumor detection, biodistribution studies, and therapeutic response monitoring in living animals. The balanced bandwidth maximizes signal collection while maintaining adequate spectral resolution for multi-channel NIR imaging of multiple biomarkers simultaneously. Deep Tissue and Intravital Microscopy: Advanced microscopy techniques imaging several millimeters deep in tissue benefit from the superior tissue transparency at 780nm. The filter enables visualization of fluorescently labeled cells, blood vessels, and molecular targets in intact organs and thick tissue specimens. Applications include tumor microenvironment imaging, neuroscience studies, and developmental biology research where deep penetration is essential. Fluorescence-Guided Surgery: Intraoperative imaging systems use NIR fluorophores in the 780nm region to provide real-time surgical guidance. The BP780 filter enables visualization of tumor margins, sentinel lymph nodes, and vascular structures during surgical procedures. The robust 2.0mm substrate ensures reliable performance in demanding clinical environments. Multi-Channel Flow Cytometry: Advanced flow cytometry panels incorporating multiple NIR fluorophores benefit from the balanced spectral characteristics. The 23nm bandwidth provides adequate channel separation while collecting sufficient fluorescence for sensitive detection at high cell velocities. Clinical diagnostic applications including immunophenotyping and cell subset analysis leverage the additional NIR detection capabilities. NIR Fluorescence Microscopy: Confocal and widefield microscopy systems utilizing NIR fluorophores benefit from reduced phototoxicity and photobleaching compared to visible wavelengths. The BP780 filter enables clean detection of Cy7, IRDye conjugates, and NIR fluorescent proteins in multi-color imaging experiments. The 2.0mm thickness withstands high laser power densities in laser scanning applications. ### Customization and Service OPTOStokes provides comprehensive customization options to optimize filter performance for specific NIR applications. Center wavelength can be tuned across the 775-785nm range to match specific fluorophore emission characteristics. FWHM can be adjusted from 20nm for enhanced spectral resolution to 30nm for increased light collection. Enhanced blocking specifications can be implemented in critical spectral regions. Geometric options include circular formats from 12.5mm to 50mm diameter, plus square, rectangular, and custom bandpass shapes. The 2.0mm thickness can be maintained for maximum stability or adjusted to 1.0mm/1.5mm for more compact systems. Mounting solutions range from unmounted filters to pre-mounted configurations in threaded rings and filter cubes. Complete NIR filter sets are available. ### Quality and Availability Every BP780-23nm-2.0mm filter undergoes comprehensive spectral verification using NIR-optimized spectrophotometers, with full transmission curves from 350-1100nm documented. Surface quality inspection and dimensional measurements ensure specification compliance. OPTOStokes maintains ISO 9001:2015 certification ensuring consistent quality across all production volumes. Stock availability enables rapid delivery for common configurations, with most orders shipping within 24-48 hours. Custom specifications typically deliver within 3-4 weeks. Volume production capabilities support OEM requirements with guaranteed batch-to-batch consistency. ### Contact Us The BP780-23nm-2.0mm filter represents OPTOStokes' commitment to delivering high-performance near-infrared optical solutions. Contact sales@optofilters.com to discuss your deep tissue imaging requirements, request detailed specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources and product information. --- ## ​BP750nm Bandpass Filter | FWHM 10nm, Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Filter_FWHM/198.html **Summary**: BP750 narrow NIR bandpass filter with 10nm FWHM and 1.1mm profile. Ideal for Alexa Fluor 750, deep tissue imaging. Optimal NIR window. Contact us today. > **Detail Content:** ### BP750nm Bandpass Filter | FWHM 10nm, Thickness 1.1mm The BP750-10nm-1.1mm bandpass filter is precision-engineered for near-infrared fluorescence applications in the optimal tissue transparency window. This advanced bandpass filter features a narrow 10nm full width at half maximum (FWHM) centered at 750nm with transmission greater than 90% across the 746-752nm passband, providing superior wavelength discrimination for Alexa Fluor 750, Cy7, and other near-infrared emitting fluorophores. With comprehensive blocking from 350-1100nm at transmission less than 1%, this filter ensures exceptional channel isolation in multi-color near-infrared imaging systems. The optimized 1.1mm substrate thickness provides an excellent balance between compact integration and mechanical stability. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers the precision required for deep tissue imaging, in vivo diagnostics, and advanced biomedical research. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 750nm at T greater than 90% | | | Transmission Range | 746-752nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 10nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.1mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20218101 | | ### Key Performance Features This NIR filter achieves exceptional spectral performance in the optimal near-infrared tissue transparency window. The narrow 10nm bandwidth provides superior wavelength discrimination, enabling precise isolation of NIR fluorophore emissions and effective separation of closely spaced channels in multi-parameter imaging. The 750nm spectral region represents the peak of the near-infrared optical window where biological tissue exhibits maximum transparency, minimal absorption, and reduced scattering. The precisely controlled transmission window spanning 746-752nm represents a narrow passband optimized for Alexa Fluor 750 (emission maximum at 775nm with significant emission in the 750nm region), Cy7, and IRDye 800CW. Peak transmission exceeding 90% within this restrictive window ensures efficient signal collection despite the narrow bandwidth. This combination is achieved through sophisticated thin film coatings design and precision deposition control. The 750nm wavelength offers critical advantages for biological imaging including maximum tissue penetration depth, minimal hemoglobin and water absorption, virtually absent tissue autofluorescence, and excellent signal-to-background ratios in live animal imaging. The narrow 10nm bandwidth maximizes spectral purity while collecting sufficient photons for sensitive fluorescence detection, making it ideal for applications demanding both wavelength precision and deep tissue penetration. Comprehensive blocking performance with transmission below 1% (optical density greater than 2) from 350-1100nm effectively suppresses all visible wavelength channels, completely rejects shorter wavelength NIR channels at 650-730nm, and eliminates detector noise from longer wavelengths. This broad rejection ensures clean signal detection even in challenging in vivo imaging scenarios with high background levels. The optimized 1.1mm substrate thickness provides superior mechanical stability compared to thinner alternatives while maintaining compact dimensions for integration into filter wheels and imaging systems. The balanced design ensures reliable performance in demanding research and clinical environments. ### Applications The BP750-10nm-1.1mm filter excels in near-infrared fluorescence applications leveraging the optimal tissue transparency window: In Vivo Whole-Animal Imaging: Small animal imaging systems for preclinical research utilize the 750nm window for maximum tissue penetration. The BP750 filter captures Alexa Fluor 750 and Cy7 emissions with minimal tissue absorption and scattering, enabling deep tissue tumor detection, biodistribution studies, and therapeutic monitoring. The narrow bandwidth enables multi-channel NIR imaging for tracking multiple targets simultaneously in living animals. Deep Tissue Microscopy: Intravital microscopy and thick tissue imaging applications benefit from the superior tissue penetration at 750nm. The filter enables visualization of fluorescently labeled structures several millimeters deep in tissue, far exceeding the penetration depth achievable with visible wavelengths. Applications include tumor microenvironment studies, neuroscience imaging, and developmental biology research in intact organisms. Surgical Guidance and Intraoperative Imaging: Real-time fluorescence-guided surgery systems use NIR fluorophores in the 750nm region to visualize tumor margins, lymph nodes, and vascular structures during surgical procedures. The BP750 filter provides precise spectral separation enabling simultaneous detection of multiple NIR markers for comprehensive surgical navigation. Multi-Channel NIR Flow Cytometry: Advanced flow cytometry panels incorporating 6-8 NIR fluorophores require narrow filters for effective channel separation. The 10nm bandwidth provides the precision necessary to distinguish Alexa Fluor 750 from adjacent NIR dyes at 700-730nm and 780-800nm, enabling high-parameter immunophenotyping with minimal spectral overlap. NIR Western Blot and Imaging: Protein detection systems utilizing NIR fluorescence benefit from the 750nm region's low background interference. The BP750 filter enables sensitive detection of Alexa Fluor 750 and IRDye 800 conjugated antibodies with excellent linearity and dynamic range for accurate protein quantification in complex samples. ### Customization and Service OPTOStokes provides comprehensive customization for NIR filter applications in the tissue transparency window. Center wavelength can be precisely tuned across the 745-760nm range to match specific fluorophore emission characteristics. FWHM can be optimized from 8nm for ultimate spectral resolution to 12nm for increased light collection. Enhanced blocking specifications can be implemented in critical spectral regions. Geometric options include circular formats from 12.5mm to 50mm diameter, plus square, rectangular, and custom bandpass shapes. The 1.1mm thickness can be maintained or adjusted to 1.0mm for maximum compactness or 1.5mm/2.0mm for enhanced rigidity. Mounting solutions range from unmounted filters to pre-mounted configurations in threaded rings and filter cubes. ### Quality and Availability Every BP750-10nm-1.1mm filter undergoes rigorous spectral verification using NIR-optimized spectrophotometers with sub-nanometer resolution. Full transmission curves document center wavelength accuracy, FWHM consistency, peak transmission, and blocking performance across the full UV-NIR range. Surface quality inspection and dimensional measurements ensure specification compliance. OPTOStokes maintains ISO 9001:2015 certification for consistent quality. Stock availability enables rapid delivery for common configurations. Custom specifications typically ship within 3-4 weeks. Volume production capabilities support OEM requirements with guaranteed batch-to-batch consistency for long-term programs. ### Contact Us The BP750-10nm-1.1mm filter exemplifies OPTOStokes' expertise in precision near-infrared optical filters for the tissue transparency window. Contact sales@optofilters.com to discuss your deep tissue imaging requirements, request detailed specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources and product information. --- ## BP720nm Bandpass Filter | FWHM 10nm, Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Filter_FWHM/197.html **Summary**: BP720 narrow NIR bandpass filter with 10nm FWHM and 1.1mm profile. Ideal for Alexa Fluor 700, precise NIR imaging. Excellent spectral resolution. Contact us. > **Detail Content:** ### BP720nm Bandpass Filter | FWHM 10nm, Thickness 1.1mm The BP720-10nm-1.1mm bandpass filter is precision-engineered for near-infrared fluorescence applications demanding exceptional spectral selectivity in the 720nm region. This advanced bandpass filter features a narrow 10nm full width at half maximum (FWHM) centered at 720nm with transmission greater than 90% across the 716-723nm passband, providing superior wavelength discrimination for Alexa Fluor 700, Alexa Fluor 750, and other near-infrared emitting fluorophores. With comprehensive blocking from 350-1100nm at transmission less than 1%, this filter ensures exceptional channel isolation in multi-color near-infrared imaging systems. The optimized 1.1mm substrate thickness provides an excellent balance between compact integration and mechanical stability, making it suitable for advanced microscopy, flow cytometry, and in vivo imaging applications. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers the precision required for high-end biomedical research and clinical instrumentation. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 720nm at T greater than 90% | | | Transmission Range | 716-723nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 10nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.1mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20218184 | | ### Key Performance Features This NIR filter achieves exceptional spectral performance through its narrow 10nm bandwidth design. The tight FWHM provides superior wavelength discrimination, enabling precise isolation of near-infrared fluorophore emissions and effective separation of closely spaced spectral features in multi-channel NIR imaging. This level of spectral precision is essential for applications requiring clean channel separation in the crowded 700-750nm NIR spectral region. The precisely controlled transmission window spanning 716-723nm represents a narrow passband optimized for Alexa Fluor 700 (emission maximum at 723nm). Peak transmission exceeding 90% within this restrictive window ensures efficient signal collection despite the narrow bandwidth. This combination is achieved through sophisticated thin film coatings design and precision deposition control, resulting in excellent signal-to-noise ratios for NIR fluorescence applications. The 720nm spectral region offers significant advantages for biological imaging including minimal tissue autofluorescence, excellent tissue penetration depth, reduced light scattering compared to visible wavelengths, and low phototoxicity enabling extended live-cell and in vivo observations. The narrow 10nm bandwidth maximizes spectral purity while collecting sufficient photons for sensitive detection, making it ideal for applications where both wavelength precision and signal strength are critical. Comprehensive blocking performance with transmission below 1% (optical density greater than 2) from 350-1100nm effectively suppresses visible wavelength crosstalk, completely rejects deep red channels at 650-690nm, blocks excitation light from typical NIR laser sources, and eliminates far-infrared detector noise. This broad rejection ensures clean fluorescence detection even in spectrally demanding multi-parameter systems. The optimized 1.1mm substrate thickness represents a balanced design, providing superior rigidity compared to 1.0mm substrates while maintaining more compact dimensions than 2.0mm alternatives. This facilitates integration into filter wheels and motorized changers while ensuring adequate mechanical stability and improved thermal performance. ### Applications The BP720-10nm-1.1mm filter excels in near-infrared fluorescence applications demanding precise spectral control: Multi-Channel NIR Microscopy: Advanced fluorescence imaging systems utilizing 4-6 NIR channels require narrow filters to prevent spectral overlap. The BP720 filter enables precise detection of Alexa Fluor 700 while maintaining complete separation from shorter wavelength NIR fluorophores at 680-700nm and longer wavelength dyes at 750-800nm. Super-resolution microscopy and multi-parameter cell biology studies benefit from the exceptional spectral purity this filter provides. In Vivo and Deep Tissue Imaging: Whole-animal imaging and deep tissue microscopy leverage NIR wavelengths for maximum tissue penetration. The BP720 filter captures Alexa Fluor 700 emissions with minimal background interference from tissue autofluorescence. The narrow bandwidth enables multi-channel NIR imaging in live animals for tumor detection, biodistribution studies, and therapeutic monitoring. The 720nm region provides optimal balance between fluorophore availability and tissue transparency. Flow Cytometry: High-parameter flow cytometry panels incorporating multiple NIR fluorophores require filters with excellent spectral separation. The 10nm bandwidth provides the precision necessary to distinguish Alexa Fluor 700 from adjacent NIR dyes, minimizing compensation requirements and improving quantitative accuracy. Clinical diagnostics and immunophenotyping applications benefit from the additional NIR detection capabilities. Confocal and Multiphoton Microscopy: Laser scanning systems using NIR excitation benefit from the narrow bandwidth for efficient emission collection while completely blocking scattered laser light. The filter enables high-contrast NIR imaging in thick tissue specimens and live animals. Two-photon microscopy applications leverage the deep tissue penetration and reduced scattering at NIR wavelengths. Western Blot and Protein Quantification: NIR fluorescence detection systems for Western blot applications benefit from the narrow bandwidth and high transmission. The BP720 filter enables detection of Alexa Fluor 700 conjugated secondary antibodies with excellent sensitivity and linear dynamic range, providing accurate protein quantification in multiplexed assays. ### Customization and Service OPTOStokes provides comprehensive customization for NIR filter applications. Center wavelength can be precisely tuned across the 715-725nm range to match specific fluorophore emission maxima. FWHM can be optimized from 8nm for ultimate spectral resolution to 12nm for increased light collection. Enhanced blocking specifications can be implemented in critical spectral regions including visible and far-NIR zones. Geometric options include circular formats from 12.5mm to 50mm diameter, plus square, rectangular, and custom bandpass shapes. The 1.1mm thickness can be maintained or adjusted to 1.0mm for maximum compactness or 1.5mm/2.0mm for enhanced rigidity. Mounting solutions range from unmounted filters to pre-mounted configurations in threaded rings and filter cubes. ### Quality and Availability Every BP720-10nm-1.1mm filter undergoes rigorous spectral verification using NIR-optimized spectrophotometers with sub-nanometer resolution. Full transmission curves document center wavelength accuracy, FWHM consistency, peak transmission, and blocking performance across 350-1100nm. Surface quality inspection and dimensional measurements ensure specification compliance. OPTOStokes maintains ISO 9001:2015 certification for consistent quality. Stock availability enables rapid delivery for common configurations. Custom specifications typically ship within 3-4 weeks. Volume production capabilities support OEM requirements with guaranteed batch-to-batch consistency for multi-year programs. ### Contact Us The BP720-10nm-1.1mm filter exemplifies OPTOStokes' expertise in precision near-infrared optical filters. Contact sales@optofilters.com to discuss your NIR imaging requirements, request detailed specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources and product information. --- ## BP700nm Bandpass Filter | FWHM 20nm, Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/196.html **Summary**: BP700 NIR bandpass filter with 20nm FWHM and 1.1mm profile. Ideal for Alexa Fluor 700, deep tissue imaging. Balanced NIR performance. Contact us today. > **Detail Content:** ### BP700nm Bandpass Filter | FWHM 20nm, Thickness 1.1mm The BP700-20nm-1.1mm bandpass filter is precision-engineered for near-infrared fluorescence applications demanding optimal performance in the 700nm spectral region. This versatile bandpass filter features a 20nm full width at half maximum (FWHM) centered at 700nm with transmission greater than 90% across the 695-705nm passband, providing ideal performance for Alexa Fluor 700, IRDye 680LT, and other near-infrared emitting fluorophores. With comprehensive blocking from 350-1100nm at transmission less than 1%, this filter ensures clean signal isolation in multi-channel near-infrared imaging systems. The optimized 1.1mm substrate thickness provides an excellent balance between compact integration and mechanical stability, making it suitable for diverse microscopy, flow cytometry, and in vivo imaging applications. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers consistent performance for demanding biomedical research and clinical applications. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 700nm ± 2nm at T greater than 90% | | | Transmission Range | 695-705nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 20nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.1mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20219588 | | ### Key Performance Features This NIR filter achieves exceptional spectral performance in the near-infrared region through its optimized 20nm bandwidth design. The FWHM provides an ideal balance between wavelength selectivity and light collection efficiency, making it suitable for applications where both spectral purity and signal strength are critical. Peak transmission exceeding 90% across the 695-705nm range ensures maximum photon throughput while maintaining adequate separation from deep red channels at 660-680nm and far-NIR channels at 750-800nm. The precisely controlled passband efficiently captures emissions from Alexa Fluor 700 (emission maximum at 723nm with significant emission extending into the 695-705nm range), IRDye 680LT, and other near-infrared fluorophores used in multi-color imaging. The 700nm spectral region offers significant advantages for biological imaging including reduced tissue autofluorescence, deeper tissue penetration compared to visible wavelengths, and minimal phototoxicity enabling extended live-cell observation. The 20nm bandwidth collects sufficient fluorophore emission to maximize signal-to-noise ratios while preventing excessive spectral overlap with adjacent channels. Comprehensive blocking performance with transmission below 1% (optical density greater than 2) from 350-1100nm effectively suppresses visible wavelength crosstalk, blocks excitation light from typical 633-690nm laser sources, and eliminates far-infrared interference. This deep rejection ensures clean fluorescence detection in multi-channel imaging systems and prevents detector saturation from intense excitation sources. The optimized 1.1mm substrate thickness represents a balanced engineering choice, providing superior rigidity compared to ultra-thin 1.0mm substrates while maintaining more compact dimensions than standard 2.0mm alternatives. This intermediate thickness facilitates integration into space-constrained filter wheels and motorized changers while ensuring adequate mechanical stability and improved thermal performance. ### Applications The BP700-20nm-1.1mm filter excels across diverse near-infrared fluorescence applications demanding balanced performance: In Vivo and Deep Tissue Imaging: Near-infrared wavelengths penetrate biological tissue more effectively than visible light, enabling deeper imaging with reduced scattering. The BP700 filter captures emissions from NIR fluorophores used in whole-animal imaging, deep tissue microscopy, and surgical guidance applications. The reduced tissue autofluorescence at 700nm dramatically improves contrast compared to visible wavelength imaging, enabling visualization of deeper anatomical structures and tumor margins. Multi-Channel Flow Cytometry: Advanced flow cytometry panels incorporating 8-15 parameters increasingly utilize near-infrared fluorophores to expand spectral capabilities. The BP700 filter enables detection of Alexa Fluor 700 and similar NIR dyes while maintaining separation from deep red APC/Alexa 647 channels at 660-680nm and far-NIR channels at 750-780nm. Clinical diagnostic applications benefit from the additional detection channels for comprehensive immunophenotyping. NIR Fluorescence Microscopy: Confocal and widefield microscopy systems utilizing near-infrared fluorophores benefit from reduced autofluorescence and photobleaching. The BP700 filter enables clean detection of Alexa Fluor 700, IRDye conjugates, and NIR fluorescent proteins in multi-color imaging experiments. Cell biology research applications including protein trafficking, cellular co-localization, and live-cell dynamics studies leverage the advantages of NIR imaging. Small Animal Imaging: Preclinical research employing optical imaging in mice and rats utilizes NIR fluorophores for tumor detection, biodistribution studies, and therapeutic monitoring. The 700nm spectral region provides optimal balance between tissue penetration and fluorophore availability. The filter's blocking performance suppresses background tissue autofluorescence, improving detection sensitivity for targeted imaging agents. Western Blot and Protein Detection: NIR fluorescence detection in Western blot applications offers superior linearity and dynamic range compared to chemiluminescence. The BP700 filter enables detection of IRDye 680 and Alexa Fluor 700 conjugated secondary antibodies, providing quantitative protein analysis with multiplexing capabilities. ### Customization and Service OPTOStokes provides comprehensive customization options to optimize filter performance for specific NIR applications. Center wavelength can be tuned across the 695-710nm range to match specific fluorophore emission maxima. FWHM can be adjusted from 15nm for enhanced spectral resolution to 25nm for increased light collection. Blocking specifications can be enhanced in critical spectral regions including deep red and far-NIR zones. Geometric options include circular formats from 12.5mm to 50mm diameter, plus square, rectangular, and custom bandpass shapes. The 1.1mm thickness can be maintained or adjusted to 1.0mm for maximum compactness or 1.5mm/2.0mm for enhanced rigidity. Mounting solutions range from unmounted filters to pre-mounted configurations in threaded rings and filter cubes. Complete NIR filter sets are available for simplified microscopy system integration. ### Quality and Availability Every BP700-20nm-1.1mm filter undergoes comprehensive spectral verification using NIR-optimized spectrophotometers, with full transmission curves from 350-1100nm documented in detailed test reports. Surface quality inspection and dimensional metrology ensure specification compliance. OPTOStokes maintains ISO 9001:2015 certification ensuring consistent quality across all production volumes. Stock availability of common configurations enables rapid delivery, with most orders shipping within 24-48 hours. Custom specifications typically deliver within 3-4 weeks. Volume production capabilities support OEM customers requiring consistent NIR filter supply for multi-year programs. ### Contact Us The BP700-20nm-1.1mm filter represents OPTOStokes' commitment to delivering high-performance near-infrared optical solutions. Contact sales@optofilters.com to discuss your NIR imaging requirements, request detailed specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources and product information. --- ## BP660nm Bandpass Filter | FWHM 80nm, Thickness 1.0mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/195.html **Summary**: BP660 ultra-wide bandpass filter with 80nm FWHM and 1.0mm profile. Maximizes signal for Cy5, Alexa 647, APC detection. Extreme throughput. Get a quote now. > **Detail Content:** ### BP660nm Bandpass Filter | FWHM 80nm, Thickness 1.0mm The BP660-80nm-1.0mm bandpass filter is engineered for applications demanding maximum light collection efficiency in the deep red spectral region. Featuring an exceptionally wide 80nm full width at half maximum (FWHM) centered at 660nm, this bandpass filter delivers superior photon throughput for fluorescence detection of Cy5, Alexa Fluor 647, APC, and other deep red emitting fluorophores. With a broad transmission window spanning 630-695nm at transmission greater than 90% and comprehensive blocking from 400-1100nm at transmission less than 1%, this filter maximizes signal strength while maintaining effective spectral isolation. The compact 1.0mm substrate thickness enables integration into space-constrained optical assemblies while reducing optical path length and focal shift. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers exceptional performance for high-throughput screening, rapid flow cytometry, and photon-limited detection applications. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 660nm ± 5nm at T greater than 90% | | | Transmission Range | 630-695nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 80nm ± 5nm | | | Blocking Range | 400-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20220401 | | ### Key Performance Features This wide FWHM bandpass filter demonstrates exceptional light collection characteristics optimized for deep red fluorescence applications. The ultra-wide 80nm FWHM provides dramatically greater photon collection compared to narrow 10-30nm bandpass alternatives, making it ideal for photon-starved detection scenarios, high-speed imaging, and maximum signal throughput applications. Peak transmission exceeding 90% across the extensive 630-695nm range ensures maximum photon capture, critical for time-resolved measurements, high-frame-rate microscopy, and rapid flow cytometry. The exceptionally broad passband efficiently captures the full emission spectrum of multiple deep red fluorophores simultaneously. Cy5 with emission maximum at 670nm, Alexa Fluor 647 centered at 665nm, APC (Allophycocyanin) with emission spanning 660-680nm, and Alexa Fluor 680 all fall within the filter's high-transmission window. This comprehensive spectral coverage maximizes detected signal levels, dramatically improves signal-to-noise ratios, and enables shorter exposure times in fluorescence detection applications. Despite the ultra-wide passband designed for maximum light collection, the filter maintains effective out-of-band blocking with transmission below 1% (optical density greater than 2) from 400-1100nm. This comprehensive rejection suppresses orange-red channel crosstalk from 590-620nm fluorophores, blocks excitation light from typical 633nm and 640nm laser sources, and eliminates near-infrared interference from 700-1100nm. The deep blocking enables clean signal detection even with intense excitation sources. The compact 1.0mm substrate thickness delivers critical advantages for modern optical instrument design. The minimal thickness reduces optical path length, virtually eliminates focal shift in tightly designed systems, and enables high-density filter packing in automated filter wheels. The reduced mass facilitates faster switching speeds and minimizes mechanical complexity in motorized filter changers. ### Applications The BP660-80nm-1.0mm filter excels across applications where maximum deep red light collection and rapid detection are essential: High-Throughput Flow Cytometry: Rapid cell analysis systems processing thousands of events per second require maximum fluorescence collection efficiency. The BP660 filter captures maximum emission from APC, Alexa Fluor 647, and Cy5-conjugated antibodies used in immunophenotyping panels. The ultra-wide bandwidth accommodates spectral variation between fluorophore lots and temperature-induced shifts during high-speed operation. Clinical diagnostic applications benefit from the enhanced sensitivity enabling detection of dim markers and rare cell populations. High-Content Screening and Drug Discovery: Automated imaging platforms analyzing thousands of wells require rapid fluorescence detection with maximum signal collection. The 80nm bandwidth maximizes signal strength from deep red fluorescent proteins and dyes, enabling shorter exposure times and higher throughput. Pharmaceutical research applications including compound screening and cellular phenotyping rely on this performance for accelerated screening cycles. Widefield Fluorescence Microscopy: Traditional widefield systems prioritize imaging speed and field of view over spectral resolution, making ultra-wide bandpass filters ideal. The BP660 filter efficiently captures emissions from Cy5, Alexa Fluor 647, and other deep red fluorophores in multi-color imaging experiments. The wide bandwidth enables lower excitation power and shorter exposure times, reducing photobleaching and phototoxicity in live-cell imaging applications. Rapid Flow Cytometry and Cell Sorting: High-speed cell sorting applications require efficient fluorescence collection at particle velocities exceeding 10,000 events per second. The ultra-wide passband maximizes photon collection during brief detection windows, improving sort accuracy and purity. Rare cell enrichment and cell line development applications benefit from the enhanced detection sensitivity. Time-Lapse and Live-Cell Imaging: Long-term imaging experiments monitoring cellular processes require filters that maximize signal collection while minimizing phototoxicity. The 80nm bandwidth enables extremely low excitation power and minimal exposure times, dramatically reducing cellular stress during extended imaging sessions. Developmental biology and cellular dynamics studies benefit from improved cell viability and extended observation periods. Photon-Limited Detection: Applications involving weak fluorescence signals, thick tissue specimens, or small sample volumes benefit from the maximum light collection this filter provides. The wide bandwidth captures significantly more photons than narrow alternatives, improving detection limits and enabling measurements that would be impossible with restrictive bandpass filters. ### Customization and Service OPTOStokes provides comprehensive customization options. Center wavelength can be tuned across the 655-665nm range. FWHM can be adjusted from 70nm to 90nm depending on application priorities. Enhanced blocking specifications can be implemented for specific spectral regions. Geometric options include circular, square, and custom bandpass shapes in various sizes. Mounting solutions range from unmounted filters for direct integration to pre-mounted configurations in threaded rings and filter cubes. Complete filter sets combining excitation, emission, and dichroic components are available. Environmental hardening ensures reliable performance in demanding conditions. ### Quality and Availability Every filter undergoes comprehensive spectral verification using calibrated spectrophotometers, with full transmission curves documented. Quality documentation includes surface quality inspection and dimensional measurements. OPTOStokes maintains ISO 9001:2015 certification ensuring consistent quality. Stock availability enables rapid delivery, with most orders shipping within 24-48 hours. ### Contact Us The BP660-80nm-1.0mm filter represents OPTOStokes' commitment to high-performance optical solutions. Contact sales@optofilters.com to discuss requirements, request specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources and product information. --- ## BP640nm Bandpass Filter | FWHM 8nm, Thickness 1.0mm **Type**: Products **URL**: https://www.optofilters.com/Filter_FWHM/194.html **Summary**: BP640 ultra-narrow bandpass filter with 8nm FWHM and 1.0mm profile. Ideal for Cy5, Alexa Fluor 647 detection. Extreme spectral precision. Contact us today. > **Detail Content:** ### BP640nm Bandpass Filter | FWHM 8nm, Thickness 1.0mm The BP640-8nm-1.0mm bandpass filter represents advanced optical engineering for applications demanding exceptional wavelength precision in the deep red spectral region. This ultra-narrow bandpass filter features an extraordinarily tight 8nm full width at half maximum (FWHM) centered at 640nm with transmission greater than 90% across the 638-640nm passband. This exceptional spectral selectivity makes it ideal for Cy5, Alexa Fluor 647 detection, laser line filtering, and multi-channel fluorescence applications requiring superior wavelength discrimination. With comprehensive blocking from 350-1100nm at transmission less than 1%, this filter ensures clean signal isolation in spectrally demanding environments. The compact 1.0mm substrate thickness enables integration into space-constrained optical assemblies while maintaining excellent optical performance. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers the precision required for high-end research and analytical instrumentation. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 640nm ± 2nm at T greater than 90% | | | Transmission Range | 638-640nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 8nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition, precision multi-cavity design | | ### Key Performance Features This narrow wavelength filter achieves exceptional spectral performance through its ultra-narrow 8nm bandwidth design. The extraordinarily tight FWHM provides superior wavelength discrimination, enabling precise isolation of deep red fluorophore emissions and separation of closely spaced spectral features that would overlap with conventional 15-25nm bandpass filters. This level of spectral precision is essential for multi-color fluorescence microscopy, flow cytometry panels with dense channel packing, and high-resolution spectroscopy applications. The precisely controlled transmission window spanning just 638-640nm represents an exceptionally narrow passband, offering wavelength selectivity that exceeds standard optical filters by significant margins. Peak transmission greater than 90% within this restrictive window ensures efficient signal collection despite the narrow bandwidth. This combination is achieved through sophisticated thin film coatings design and precision deposition control, resulting in excellent signal-to-noise ratios for photon-limited applications. Comprehensive blocking performance with transmission below 1% (optical density greater than 2) extends across the full 350-1100nm spectral range, effectively suppressing orange channel crosstalk from 590-620nm, completely rejecting far-red channels at 670-700nm, and eliminating near-infrared interference. This broad rejection ensures clean fluorescence detection even in spectrally crowded multi-parameter systems. The compact 1.0mm substrate thickness delivers critical advantages for modern optical instrument design. The minimal thickness reduces optical path length, virtually eliminates focal shift, and enables high-density filter packing in automated filter wheels. The reduced mass facilitates faster switching speeds in motorized mechanisms and minimizes bearing loads in precision positioning systems. ### Applications The BP640-8nm-1.0mm filter excels in demanding applications requiring extreme spectral precision in the deep red region: Multi-Channel Fluorescence Microscopy: Advanced imaging systems utilizing 5-8 fluorescence channels require ultra-narrow filters to prevent spectral overlap. The BP640 filter enables precise detection of Cy5 (emission maximum at 670nm with significant emission at 640nm), Alexa Fluor 647, and other deep red fluorophores while maintaining complete separation from orange mCherry/Texas Red channels at 605-620nm and far-red Alexa Fluor 680 channels at 700-720nm. Super-resolution microscopy and multi-parameter cell biology studies benefit from this exceptional spectral purity. Flow Cytometry: High-parameter flow cytometry panels with 20-30 markers create extreme spectral crowding. The 640nm region is particularly dense with APC, Alexa Fluor 647, and various tandem conjugates. The 8nm bandwidth provides the precision necessary to isolate specific fluorophore emissions and minimize compensation requirements. Clinical diagnostics and immunophenotyping applications rely on this performance for accurate cell population discrimination. Laser Line Filtering: Red diode lasers at 638nm and 640nm require precise wavelength selection and amplified spontaneous emission suppression. The BP640 filter isolates desired laser wavelengths while rejecting adjacent spectral content. Laser bandpass filter applications include Raman spectroscopy, laser-based analytical instruments, and optical metrology systems. Confocal and Spinning Disk Microscopy: Laser scanning systems using 633nm HeNe or 638nm diode laser excitation benefit from the narrow bandwidth for efficient Cy5 emission collection while completely blocking scattered laser light. The 1.0mm thickness minimizes focal shift in precision optical systems while providing adequate mechanical stability. Single-Molecule Detection: Ultra-sensitive detection techniques including TIRF microscopy and single-particle tracking require filters with extreme spectral purity to isolate weak fluorescence signals. The 8nm bandwidth minimizes background from adjacent channels and autofluorescence, enabling detection of individual fluorophore molecules. ### Customization and Service OPTOStokes provides comprehensive customization for ultra-narrow filter applications. Center wavelength can be precisely tuned across the 635-645nm range with sub-nanometer accuracy to match specific laser lines or fluorophore emission peaks. FWHM can be optimized from 6nm for ultimate resolution to 10nm for increased light collection. Enhanced blocking specifications achieving OD greater than 3 or OD greater than 4 can be implemented in critical spectral regions. Geometric options include circular formats from 12.5mm to 50mm diameter, plus square, rectangular, and custom bandpass shapes. The 1.0mm thickness can be maintained for maximum compactness or adjusted to 0.7mm for ultra-compact systems or 1.5mm/2.0mm for enhanced rigidity. Mounting solutions range from unmounted filters to pre-mounted configurations in threaded rings and filter cubes. ### Quality and Availability Every BP640-8nm-1.0mm filter undergoes rigorous spectral verification using research-grade spectrophotometers with sub-nanometer resolution. Full transmission curves document center wavelength accuracy, FWHM consistency, peak transmission, and blocking performance. Surface quality inspection and dimensional measurements ensure compliance with specifications. OPTOStokes maintains ISO 9001:2015 certification for consistent quality across all production. Stock availability of common configurations enables rapid delivery. Custom specifications typically ship within 3-4 weeks. Volume production capabilities support OEM requirements with guaranteed batch-to-batch consistency. ### Contact Us The BP640-8nm-1.0mm filter exemplifies OPTOStokes' expertise in ultra-narrow bandpass filter technology. Contact sales@optofilters.com to discuss requirements, request detailed specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources and product information. --- ## ​BP610nm Bandpass Filter | FWHM 20nm, Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/193.html **Summary**: BP610 bandpass filter with 20nm FWHM and 1.1mm profile. Optimized for mCherry, Texas Red detection. Balanced performance, versatile design. Contact us today. > **Detail Content:** ### BP610nm Bandpass Filter | FWHM 20nm, Thickness 1.1mm The BP610-20nm-1.1mm bandpass filter is precision-engineered to deliver optimal performance for red fluorophore detection, balancing spectral selectivity with excellent light collection efficiency. This versatile bandpass filter features a 20nm full width at half maximum (FWHM) centered at 610nm with transmission greater than 90% across the 605-615nm passband, providing ideal performance for mCherry, Texas Red, and other orange-red emitting fluorophores. With comprehensive blocking from 350-1100nm at transmission less than 1%, this filter ensures clean signal isolation in multi-channel fluorescence systems. The optimized 1.1mm substrate thickness provides an excellent balance between compact integration and mechanical stability, making it suitable for diverse microscopy and flow cytometry applications. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers consistent performance for demanding research and clinical applications. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 610nm ± 3nm at T greater than 90% | | | Transmission Range | 605-615nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 20nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.1mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20219982 | | ### Key Performance Features This red filter achieves exceptional spectral performance through its optimized 20nm bandwidth design. The FWHM provides an ideal balance between wavelength selectivity and light collection efficiency, making it suitable for applications where both spectral purity and signal strength are important. Peak transmission exceeding 90% across the 605-615nm range ensures maximum photon throughput while maintaining adequate separation from yellow-green channels at 560-590nm and far-red channels at 650-680nm. The precisely controlled passband efficiently captures emissions from mCherry (emission maximum at 610nm), Texas Red (615nm peak), and tdTomato (581nm peak with significant emission extending to 610nm). This spectral positioning makes the filter particularly effective for multi-color imaging applications where moderate spectral resolution is required without sacrificing signal levels. The 20nm bandwidth collects sufficient fluorophore emission to maximize signal-to-noise ratios while preventing excessive spectral overlap with adjacent channels. Comprehensive blocking performance with transmission below 1% (optical density greater than 2) from 350-1100nm effectively suppresses green and yellow channel crosstalk, blocks excitation light from typical 561nm and 594nm laser sources, and eliminates far-red and near-infrared interference. This deep rejection ensures clean fluorescence detection in multi-channel imaging systems and prevents detector saturation from intense excitation sources. The optimized 1.1mm substrate thickness represents a balanced engineering choice, providing superior rigidity compared to ultra-thin 1.0mm substrates while maintaining more compact dimensions than standard 2.0mm alternatives. This intermediate thickness facilitates integration into space-constrained filter wheels and motorized changers while ensuring adequate mechanical stability for secure mounting. The improved thermal mass compared to thinner substrates enhances temperature stability during extended imaging sessions. ### Applications The BP610-20nm-1.1mm filter excels across diverse applications demanding balanced performance between spectral precision and signal collection: Multi-Color Fluorescence Microscopy: Widefield and confocal microscopy systems utilizing 3-5 fluorescence channels benefit from the BP610 filter's balanced spectral characteristics. The filter enables clean detection of mCherry, tdTomato, and Texas Red while maintaining adequate separation from GFP/YFP channels at 510-560nm and Cy5/Alexa Fluor 647 channels at 665-680nm. Cell biology research applications including protein localization, cellular co-localization studies, and tissue immunofluorescence rely on this versatile performance. Flow Cytometry: Multi-parameter flow cytometry panels employing PE-Texas Red, PE-Cy5, and similar tandem conjugates require filters that balance spectral resolution with light collection efficiency. The 20nm bandwidth provides adequate channel separation while collecting sufficient fluorescence for sensitive detection at high cell velocities. Clinical --- ## ​BP605nm Bandpass Filter | FWHM 46nm, Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/192.html **Summary**: BP605 wide bandpass filter with 46nm FWHM and 1.1mm profile. Maximizes signal for mCherry, Texas Red, PE-Cy5 detection. High transmission. Get a quote today. > **Detail Content:** ### BP605nm Bandpass Filter | FWHM 46nm, Thickness 1.1mm The BP605-46nm-1.1mm bandpass filter is engineered for applications demanding maximum light collection in the orange-red spectral region. Featuring a wide 46nm full width at half maximum (FWHM) centered at 605nm, this bandpass filter delivers exceptional photon throughput for fluorescence detection of mCherry, Texas Red, PE-Cy5, and other orange-red emitting fluorophores. With a broad transmission window spanning 585-620nm at transmission greater than 90% and comprehensive blocking from 350-1100nm at transmission less than 1%, this filter maximizes signal strength while maintaining effective spectral isolation. The optimized 1.1mm substrate thickness provides an ideal balance between compact integration and mechanical stability, making it suitable for diverse optical system architectures. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers consistent performance for demanding research and clinical applications. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 605nm ± 5nm at T greater than 90% | | | Transmission Range | 585-620nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 46nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.1mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20209090 | | ### Key Performance Features This wide 660nm bandpass region filter demonstrates performance characteristics optimized for orange-red fluorescence applications requiring maximum signal collection. The wide 46nm FWHM provides substantially greater light gathering capability compared to narrow 15-25nm bandpass alternatives, making it ideal for photon-limited detection scenarios, high-speed imaging, and weak fluorescence measurements. Peak transmission exceeding 90% across the broad 585-620nm range ensures maximum photon throughput, critical for time-resolved measurements and high-frame-rate microscopy. The wide passband efficiently captures the full emission spectrum of commonly used orange-red fluorophores. mCherry with emission maximum at 610nm, Texas Red centered at 615nm, PE-Cy5 with emission spanning 660-680nm (with significant emission extending into the 600-620nm range), and DsRed derivatives all benefit from this broad spectral acceptance. This maximizes detected signal levels, improves signal-to-noise ratios, and reduces exposure times in fluorescence detection applications. Despite the wide passband designed for maximum light collection, the filter maintains effective out-of-band blocking with transmission below 1% (optical density greater than 2) from 350-1100nm. This comprehensive rejection suppresses yellow-green channel crosstalk from 530-580nm fluorophores, blocks excitation light from typical 555-590nm sources, and eliminates far-red and near-infrared interference from 650-1100nm. The deep blocking enables clean signal detection in multi-channel imaging systems. The optimized 1.1mm substrate thickness represents a balanced design choice, providing greater rigidity than ultra-thin 1.0mm substrates while maintaining more compact dimensions than standard 2.0mm alternatives. This intermediate thickness facilitates integration into space-constrained optical assemblies while ensuring adequate mechanical stability and improved thermal dissipation compared to thinner substrates. ### Applications The BP605-46nm-1.1mm filter excels across diverse applications where maximum orange-red light collection and compact integration are essential: Widefield Fluorescence Microscopy: Traditional widefield systems prioritize imaging speed and field of view, making wide bandpass filters ideal for efficient emission collection. The BP605 filter efficiently captures emissions from mCherry, tdTomato, Texas Red, and DsRed fluorophores commonly used in cellular imaging, protein localization, and tissue histology. The wide bandwidth maximizes signal collection enabling shorter exposure times and reduced photobleaching in live-cell imaging. Flow Cytometry and Cell Analysis: Flow cytometry systems analyzing cells at high velocities require efficient fluorescence collection. The BP605 filter captures maximum emission from PE-Texas Red, PE-Cy5, and tandem conjugates used in immunophenotyping panels. The wide passband accommodates spectral variation between fluorophore lots and temperature-induced shifts. Clinical diagnostic applications rely on this filter's high collection efficiency for accurate cell quantification. High-Throughput Screening: Automated microplate readers and high-content imaging systems require rapid, reliable fluorescence detection across multi-well formats. The BP605 filter enables efficient detection of orange-red fluorescent proteins and dyes used in compound screening and cellular phenotyping. The wide bandwidth maximizes signal strength, improving assay sensitivity and dynamic range. Confocal Microscopy: Point-scanning confocal systems employ bandpass filters to collect fluorescence while rejecting laser scatter. The BP605 filter efficiently captures mCherry and Texas Red emissions following 561nm or 594nm laser excitation. The wide bandwidth collects more of the fluorophore emission spectrum, improving signal levels in deep tissue imaging and thick specimen applications. Live-Cell Imaging and Time-Lapse Microscopy: Long-term imaging experiments monitoring cellular processes require filters that maximize signal collection while minimizing phototoxicity. The wide FWHM bandpass characteristics enable lower excitation power and shorter exposure times, reducing cellular stress and improving viability during extended imaging sessions. ### Customization and Service OPTOStokes provides comprehensive customization options. Center wavelength can be tuned across the 600-610nm range. FWHM can be adjusted from 40nm to 55nm depending on application priorities. Enhanced blocking specifications can be implemented for specific spectral regions. Geometric options include circular, square, and custom bandpass shapes in various sizes. Mounting solutions range from unmounted filters for direct integration to pre-mounted configurations in threaded rings and filter cubes. Multi-filter assemblies combining this emission filter with complementary excitation filters and dichroic beamsplitters are available as integrated modules. Environmental hardening ensures reliable performance in demanding conditions. ### Quality and Availability Every filter undergoes comprehensive spectral verification using calibrated spectrophotometers, with full transmission curves documented. Quality documentation includes surface --- ## BP585nm Bandpass Filter | FWHM 20nm, Thickness 1.0mm, OD6 Blocking **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/191.html **Summary**: BP585 bandpass filter with 20nm FWHM and OD6 blocking. Ideal for multi-channel fluorescence, flow cytometry. Superior contrast, compact 1.0mm design. Contact us. > **Detail Content:** ### BP585nm Bandpass Filter | FWHM 20nm, Thickness 1.0mm, OD6 Blocking The BP585-20nm-1.0mm bandpass filter combines precise spectral selectivity with exceptional out-of-band rejection, delivering superior performance for demanding multi-channel fluorescence applications. This advanced bandpass filter features a 20nm full width at half maximum (FWHM) centered at 585nm with average transmission greater than 90% across the 580-590nm passband. The extraordinary blocking performance achieves average optical density greater than 6 (OD6) from 350-565nm and 602.5-800nm, with OD greater than 3 from 800-1050nm, providing exceptional channel isolation in multi-color imaging systems. The compact 1.0mm substrate thickness enables integration into space-constrained optical assemblies while maintaining excellent mechanical stability. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers the performance required for high-end research and clinical instrumentation. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 585nm ± 2nm | | | Transmission Range | 580-590nm at average T greater than 90% | | | Full Width at Half Maximum (FWHM) | 20nm ± 2nm | | | Blocking Zone 1 | 350-565nm at average OD greater than 6 (minimum OD greater than 5) | | | Blocking Zone 2 | 602.5-800nm at average OD greater than 6 (minimum OD greater than 5) | | | Blocking Zone 3 | 800-1050nm at OD greater than 3 | | | Substrate Thickness | 1.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition, advanced multi-layer design | | ### Key Performance Features This high OD bandpass filter achieves exceptional spectral performance optimized for multi-channel fluorescence applications. The 20nm FWHM provides an optimal balance between wavelength selectivity and light collection, efficiently capturing emissions from PE-Texas Red, mCherry, and other orange-red fluorophores while maintaining adequate separation from adjacent channels. The extraordinary multi-zone blocking architecture delivers unprecedented rejection performance. Zone 1 (350-565nm) achieves average OD6, providing greater than 1,000,000-fold suppression of green and yellow fluorescence channels and excitation light. Zone 2 (602.5-800nm) maintains average OD6, completely eliminating far-red channel crosstalk. Zone 3 (800-1050nm) provides OD3 blocking, suppressing near-infrared detector noise and scattered light. This comprehensive rejection ensures absolutely clean signal detection in spectrally crowded multi-parameter systems. Average transmission exceeding 90% across the 580-590nm passband maximizes signal collection from target fluorophores. The compact 1.0mm thickness reduces optical path length, minimizes focal shift, and enables high-density filter packing in automated systems. The robust hard coating ensures long-term durability and fluorescence optics performance stability. ### Applications The BP585-20nm-1.0mm filter excels in applications demanding extreme channel isolation and high contrast: Multi-Parameter Flow Cytometry: Advanced flow cytometry panels with 15-30 parameters require exceptional spectral separation. The OD6 blocking eliminates spillover from green, yellow, and far-red channels, enabling accurate detection of PE-Texas Red, PE-Cy5, and similar tandem conjugates. Clinical diagnostics, immunophenotyping, and rare cell detection benefit from the superior channel isolation this fluorescence detection capability provides. Multi-Color Fluorescence Microscopy: Imaging systems utilizing 4-6 simultaneous fluorescence channels require filters with deep blocking to prevent crosstalk. The BP585 filter enables clean detection of mCherry, tdTomato, and DsRed proteins while completely rejecting GFP, YFP, and Cy5 emissions. Super-resolution microscopy and live-cell imaging applications benefit from the enhanced contrast and reduced background. High-Content Screening: Automated imaging platforms analyzing thousands of samples require reproducible, high-contrast fluorescence detection. The OD6 blocking ensures consistent performance across plate formats, while the 1.0mm thickness facilitates rapid filter wheel switching. Pharmaceutical research and drug discovery applications rely on this precision performance. Confocal and Laser Scanning Microscopy: Point-scanning systems benefit from the extreme laser line rejection this filter provides. The OD6 blocking at typical 561nm excitation wavelengths prevents detector saturation, enabling detection of weak fluorescence signals in thick specimens and tissue sections. ### Customization and Service OPTOStokes provides comprehensive customization options. Center wavelength can be tuned across 580-590nm. FWHM can be adjusted from 15-25nm. Blocking specifications can be enhanced or extended to additional spectral regions. Geometric options include circular, square, and custom bandpass shapes. Mounting solutions range from unmounted to integrated filter sets for simplified system integration. ### Quality and Availability Every filter undergoes rigorous spectral verification across the full UV-NIR range, documenting OD performance at critical wavelengths. Comprehensive quality documentation supports customer quality systems and regulatory requirements. OPTOStokes maintains inventory for rapid delivery and offers expedited custom manufacturing. ### Contact Us The BP585-20nm-1.0mm filter exemplifies OPTOStokes' expertise in high-performance optical filters. Contact sales@optofilters.com to discuss requirements, request specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources. --- ## BP580nm Bandpass Filter | FWHM 3nm, Thickness 2.0mm, OD5 Blocking **Type**: Products **URL**: https://www.optofilters.com/Filter_FWHM/190.html **Summary**: BP580 ultra-narrow 3nm FWHM bandpass filter with OD5 blocking. Ideal for laser line cleanup, Raman spectroscopy. Extreme precision. Request a quote today. > **Detail Content:** ### BP580nm Bandpass Filter | FWHM 3nm, Thickness 2.0mm, OD5 Blocking The BP580-3nm-2.0mm bandpass filter represents the pinnacle of ultra-narrow spectral filtering technology, delivering unprecedented wavelength precision for the most demanding optical applications. This extraordinary bandpass filter features an exceptionally narrow 3nm full width at half maximum (FWHM) centered at 580nm, providing extreme wavelength discrimination for laser line cleanup, Raman spectroscopy, and single-molecule detection. With transmission greater than 80% at 580nm and blocking performance exceeding optical density 5 (transmission less than 0.01%) across 350-1100nm, this filter enables unparalleled signal purity in complex spectral environments. The robust 2.0mm substrate ensures mechanical stability and high laser damage threshold for demanding applications. Manufactured by OPTOStokes using state-of-the-art high precision coating technology, this filter meets the extreme requirements of advanced research and precision instrumentation. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 580nm ± 1nm | | | Peak Transmission | Greater than 80% at 580nm | | | Full Width at Half Maximum (FWHM) | 3nm ± 1nm | | | Blocking Range | 350-1100nm at T less than 0.01% | | | Optical Density (OD) | Greater than 5.0 (equivalent to T less than 0.01%) | | | Substrate Thickness | 2.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition, advanced multi-cavity design | | | Part Number | 20223091 | | ### Key Performance Features This laser bandpass filter achieves performance levels that position it among the most advanced optical filters available worldwide. The extraordinary 3nm FWHM represents extreme wavelength selectivity, enabling isolation of individual laser lines and separation of spectral features that would be completely indistinguishable with conventional filters. This level of spectral precision is essential for laser line cleanup, high-resolution Raman spectroscopy, and advanced spectroscopy applications demanding ultimate wavelength discrimination. The remarkable blocking performance with transmission below 0.01% (optical density greater than 5) represents the highest level of rejection commercially available. This translates to greater than 100,000-fold suppression of unwanted wavelengths, ensuring absolutely clean signal detection even in the presence of intense laser sources or bright background emissions. The comprehensive OD5 blocking extends across the full 350-1100nm range, eliminating all interference from UV through near-infrared regions. Peak transmission exceeding 80% at the precise 580nm center wavelength ensures efficient signal collection despite the extremely narrow passband. This represents exceptional performance for such a restrictive bandwidth, achieved through sophisticated thin film coatings design and precision manufacturing. The tight ±1nm center wavelength tolerance guarantees precise alignment with specific laser lines or spectral features. The robust 2.0mm substrate provides superior mechanical stability, thermal performance, and laser damage resistance essential for high-power laser applications. The substantial thickness facilitates secure mounting in precision optical assemblies and ensures long-term dimensional stability under varying environmental conditions. ### Applications The BP580-3nm-2.0mm filter excels in advanced applications demanding extreme spectral precision: Laser Line Cleanup and Wavelength Selection: Yellow lasers including 577nm and 579nm lines require precise wavelength isolation and amplified spontaneous emission suppression. The 3nm bandwidth provides surgical precision in selecting desired wavelengths while rejecting adjacent plasma lines and broadband background. Applications include laser-based analytical instruments, optical pumping systems, and precision laser sources. Raman Spectroscopy: High-resolution Raman systems demand extreme rejection of Rayleigh scatter and laser background while efficiently transmitting weak Raman signals. The BP580 filter enables detection of Raman shifts in the yellow spectral region with minimal interference. The OD5 blocking prevents detector saturation from scattered laser light, enabling measurement of weak Raman features in chemical analysis, materials characterization, and pharmaceutical research. Single-Molecule Detection and Super-Resolution Microscopy: Advanced microscopy techniques including PALM, STORM, and single-molecule tracking require extreme spectral purity to isolate individual fluorophore emissions. The 3nm bandwidth provides the wavelength discrimination necessary for separating closely spaced emission peaks in multi-color super-resolution imaging. The deep blocking eliminates background fluorescence and scattered excitation light that would compromise single-molecule detection sensitivity. Precision Spectroscopy and Optical Metrology: Wavelength calibration, spectral line analysis, and optical frequency standards require filters with exceptional wavelength accuracy and stability. The ±1nm center wavelength tolerance and narrow 3nm passband enable precise spectral measurements for applications in atomic spectroscopy, optical telecommunications, and quantum optics research. Laser-Induced Fluorescence and Analytical Chemistry: Ultra-sensitive detection of trace analytes using laser-induced fluorescence benefits from the extreme blocking performance, which suppresses scattered excitation light enabling detection of extremely weak fluorescence signals. Environmental monitoring, forensic analysis, and biomedical diagnostics rely on this capability for detecting parts-per-billion concentrations. ### Customization and Engineering OPTOStokes provides comprehensive customization for ultra-narrow filter applications. Center wavelength can be precisely tuned across the 570-590nm range with sub-nanometer accuracy. FWHM can be optimized from 2nm to 5nm depending on application requirements. Enhanced blocking specifications achieving OD6 or higher can be implemented for extreme applications. Custom bandpass designs accommodate specific laser wavelengths and spectral requirements. Geometric options include circular, square, and custom shapes in various sizes. Mounting solutions range from unmounted filters to precision cells and laser-grade housings. Environmental hardening ensures reliable performance in demanding research and industrial environments. ### Quality and Availability Every filter undergoes rigorous spectral verification using research-grade instrumentation with sub-nanometer resolution. Comprehensive quality documentation includes measured spectral curves, blocking performance verification, and dimensional inspection results. OPTOStokes maintains ISO 9001:2015 certification ensuring consistent quality across all production. ### Contact Us The BP580-3nm-2.0mm filter represents OPTOStokes' expertise in ultra-narrow bandpass filter technology. Contact sales@optofilters.com to discuss your requirements, request detailed specifications, or obtain pricing. Visit www.optofilters.com for complete technical resources and product information. --- ## ​BP565nm Bandpass Filter | FWHM 20nm, Thickness 0.7mm **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/189.html **Summary**: BP565 ultra-thin bandpass filter with 20nm FWHM and 0.7mm profile. Ideal for space-constrained Cy3, TRITC detection. Compact design, high performance. Contact us. > **Detail Content:** ### BP565nm Bandpass Filter | FWHM 20nm, Thickness 0.7mm The BP565-20nm-0.7mm bandpass filter represents the ultimate in compact optical filter design, combining precise spectral selectivity with an exceptionally thin 0.7mm substrate profile. This ultra-thin bandpass filter features a 20nm full width at half maximum (FWHM) centered at 565nm, delivering excellent wavelength discrimination for yellow-orange fluorophore detection in space-constrained applications. With a precisely controlled transmission window spanning 557-568nm and comprehensive blocking from 350-1100nm at transmission less than 1%, this filter enables clean signal isolation while occupying minimal optical path length. The ultra-thin 0.7mm substrate makes it ideal for portable instruments, multi-filter stacks, and weight-sensitive optical assemblies. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers exceptional performance for demanding applications where size and weight matter. ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 563nm ± 3nm at T greater than 90% | | | Transmission Range | 557-568nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 20nm ± 3nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 0.7mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20224808 | | ### Key Performance Features This 565nm filter achieves remarkable spectral performance in an ultra-compact package. The 20nm FWHM provides an optimal balance between wavelength selectivity and light collection efficiency, making it ideal for detecting Cy3, TRITC, and rhodamine derivatives while maintaining adequate separation from green and far-red fluorescence channels. Peak transmission exceeding 90% across the 557-568nm range ensures maximum signal throughput despite the narrow passband. The revolutionary 0.7mm substrate thickness represents a 30% reduction compared to standard 1.0mm filters and a 65% reduction versus conventional 2.0mm substrates. This ultra-thin profile delivers critical advantages for modern optical instrument design. The minimal thickness reduces optical path length, virtually eliminating focal shift in tightly designed optical systems. Multiple filters can be stacked in filter wheels and motorized changers without exceeding mechanical clearance limits. The dramatically reduced mass enables faster switching speeds in automated filter selection mechanisms and minimizes bearing loads in precision positioning stages. Despite the ultra-thin substrate, the filter maintains comprehensive blocking performance with transmission below 1% (optical density greater than 2) from 350-1100nm. This effective rejection suppresses green channel crosstalk, blocks excitation light from 530-555nm sources, and eliminates far-red and near-infrared interference. Advanced optical coating technology ensures coating stability and environmental durability even on the thin substrate. ### Applications The BP565-20nm-0.7mm bandpass filter excels in applications demanding both optical precision and minimal size: Portable and Handheld Fluorescence Instruments: Point-of-care diagnostic devices, field-deployable environmental sensors, and handheld fluorescence readers require compact, lightweight optical components. The 0.7mm thickness enables ultra-compact optical detection modules while maintaining professional-grade spectral performance. This fluorescence detection capability supports applications in medical diagnostics, water quality testing, and on-site chemical analysis. Multi-Position Filter Wheels: Automated microscopy and spectroscopy systems utilize motorized filter wheels for rapid wavelength selection. The ultra-thin profile allows 8-12 filter positions within the same wheel diameter where conventional 2.0mm filters limit capacity to 5-6 positions. The reduced rotational inertia enables faster switching speeds and lower motor power consumption. Fluorescence Microscopy: The filter efficiently captures Cy3, TRITC, and rhodamine emissions in immunofluorescence, cellular imaging, and FISH applications. The 20nm bandwidth provides good spectral separation from green GFP/FITC channels and red mCherry/Texas Red channels in multi-color imaging experiments. Microscopy optics benefit from the minimal focal shift this thin substrate provides. Compact Flow Cytometry Systems: Benchtop and portable flow cytometers require space-efficient optical assemblies. The BP565 filter enables detection of PE-Cy3 and similar tandem conjugates in compact multi-channel detection systems. The thin profile facilitates tight component spacing in miniaturized cytometer designs. Endoscopic and Medical Imaging: Minimally invasive medical imaging systems demand ultra-compact optical components. The 0.7mm thickness enables integration into small-diameter endoscope heads and catheter-based imaging devices for fluorescence-guided surgery and diagnostic imaging. ### Customization and Service OPTOStokes provides comprehensive customization for ultra-thin filter applications. Spectral parameters including center wavelength (555-575nm range) and FWHM (15-25nm) can be optimized for specific fluorophores. Geometric options include circular formats from 6mm to 50mm diameter, plus square, rectangular, and custom shapes. The 0.7mm thickness can be maintained or adjusted to 0.5mm for extreme miniaturization or 1.0mm for enhanced rigidity. Mounting solutions range from unmounted filters for direct bonding to pre-mounted configurations in threaded rings and filter cubes. Custom coatings accommodate specific blocking requirements or multi-band designs. Environmental hardening ensures reliable performance in demanding conditions. ### Quality and Availability Every filter undergoes rigorous spectral verification and quality inspection. OPTOStokes maintains inventory of common configurations for rapid delivery, with custom specifications typically shipping within 3-4 weeks. Our ISO 9001:2015 certified processes ensure consistent quality across all production volumes. ### Contact Us The BP565-20nm-0.7mm filter exemplifies OPTOStokes' commitment to innovative optical solutions. Whether you need this exact specification or a customized variant, our team is ready to support your project. Contact sales@optofilters.com to discuss requirements, request technical documentation, or obtain pricing. Visit www.optofilters.com for complete product information and technical resources. --- ## BP560nm Bandpass Filter | FWHM 50nm, Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/188.html **Summary**: BP560 wide bandpass filter with 50nm FWHM and 1.1mm profile. Maximizes signal for Cy3, TRITC, rhodamine detection. High transmission, versatile design. Get a quote. > **Detail Content:** ### BP560nm Bandpass Filter | FWHM 50nm, Thickness 1.1mm The BP560-50nm-1.1mm bandpass filter is precision-engineered for applications demanding maximum light collection efficiency in the yellow-orange spectral region. Featuring a wide 50nm full width at half maximum (FWHM) centered at 560nm, this bandpass filter delivers exceptional photon throughput for fluorescence detection of Cy3, TRITC, rhodamine, and other commonly used orange-emitting fluorophores. With a broad transmission window spanning 555-570nm and comprehensive blocking from 400-1100nm at transmission less than 1%, this filter maximizes signal strength while maintaining effective spectral isolation. The optimized 1.1mm substrate thickness provides an ideal balance between compact integration and mechanical stability, making it suitable for diverse optical system architectures. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers consistent performance for demanding research and industrial applications worldwide. ### Technical Specifications The BP560-50nm-1.1mm filter combines broad spectral bandwidth with effective out-of-band rejection, optimized for maximum signal collection in yellow-orange fluorescence applications. The following table details the complete technical specifications: | Parameter | Specification | | | Center Wavelength (CWL) | 560nm ± 3nm at T greater than 90% | | | Transmission Range | 555-570nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 50nm ± 5nm | | | Blocking Range | 400-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 1.1mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20207736 | | ### Key Performance Features This 630nm filter region component demonstrates performance characteristics optimized for yellow-orange fluorescence applications requiring maximum signal collection. The wide 50nm FWHM provides substantially greater light gathering capability compared to narrow 10-20nm bandpass alternatives, making it ideal for photon-limited detection scenarios, high-speed imaging applications, and weak fluorescence measurements. Peak transmission exceeding 90% across the broad 555-570nm range ensures maximum photon throughput, critical for time-resolved measurements, high-frame-rate microscopy, and sensitive detection systems. The wide passband efficiently captures the full emission spectrum of commonly used yellow-orange fluorophores. Cy3 dye with emission maximum at 570nm, TRITC (Tetramethylrhodopsin) with emission centered at 572nm, and rhodamine derivatives with emissions spanning 565-580nm all fall within or near the filter's high-transmission window. This broad spectral acceptance maximizes detected signal levels, improves signal-to-noise ratios, and reduces exposure times in fluorescence imaging applications. The wide bandwidth also provides tolerance for fluorophore emission variations caused by environmental factors including pH, temperature, and molecular interactions. Despite the wide passband designed for maximum light collection, the filter maintains effective out-of-band blocking with transmission below 1% (optical density greater than 2) from 400-1100nm. This comprehensive rejection range suppresses green channel crosstalk from 515-545nm fluorophores, blocks excitation light from typical 530-555nm sources, and eliminates far-red and near-infrared interference from 600-1100nm. The deep blocking performance enables clean signal detection in multi-channel imaging systems and prevents detector saturation from intense excitation sources. The optimized 1.1mm substrate thickness represents a unique design choice balancing compact integration with mechanical performance. This intermediate thickness provides greater rigidity than ultra-thin 1.0mm substrates while maintaining more compact dimensions than standard 2.0mm alternatives. The 1.1mm profile facilitates integration into space-constrained optical assemblies while ensuring adequate mechanical stability for secure mounting and long-term dimensional stability. This thickness also provides improved thermal dissipation compared to thinner substrates, beneficial for applications involving elevated operating temperatures or high optical power densities. ### Applications The BP560-50nm-1.1mm bandpass filter excels across diverse scientific and industrial applications where maximum yellow-orange light collection and compact integration are essential: Widefield Fluorescence Microscopy: Traditional widefield microscopy systems prioritize imaging speed and large field of view, making wide bandpass filters ideal for efficient emission collection. The BP560 filter efficiently captures emissions from Cy3, TRITC, rhodamine B, rhodamine 6G, and Texas Red fluorophores commonly used in immunofluorescence, FISH (fluorescence in situ hybridization), and cellular localization studies. The wide bandwidth maximizes signal collection enabling shorter exposure times, reduced photobleaching, and improved viability in live-cell imaging. Biological research applications including tissue histology, developmental biology, and neuroscience benefit from the enhanced signal levels this fluorescence detection capability provides. High-Throughput Screening and Drug Discovery: Automated microplate readers and high-content imaging systems used in pharmaceutical research require rapid, reliable fluorescence detection across 96, 384, or 1536-well formats. The BP560 filter enables efficient detection of rhodamine-based assays, Cy3-labeled compounds, and orange fluorescent protein reporters used in compound screening, cellular phenotyping, and dose-response studies. The wide bandwidth maximizes signal strength from each well, improving assay sensitivity and dynamic range. The compact 1.1mm thickness facilitates integration into multi-position filter wheels without excessive mechanical complexity. Flow Cytometry and Cell Analysis: Flow cytometry systems analyze cells at rates of thousands per second, requiring efficient fluorescence collection at high particle velocities. The BP560 filter captures maximum emission from PE-Cy3, PE-Texas Red, and other tandem conjugates commonly used in immunophenotyping panels. The wide passband accommodates spectral variation between fluorophore lots and temperature-induced shifts during operation. Clinical diagnostic applications including immune cell enumeration, cancer detection, and infectious disease monitoring rely on this filter's high collection efficiency for accurate cell quantification and population discrimination. Confocal Microscopy: Point-scanning confocal microscopy systems employ bandpass filters to collect fluorescence while rejecting laser scatter and adjacent fluorescence channels. The BP560 filter efficiently captures Cy3 and rhodamine emissions following 543nm HeNe laser or 561nm DPSS laser excitation. The wide bandwidth collects more of the fluorophore emission spectrum compared to narrow alternatives, improving signal levels in photon-limited deep tissue imaging and thick specimen applications. The blocking performance prevents green channel crosstalk and far-red channel bleed-through in multi-color confocal imaging. Automated Imaging and Machine Vision: Industrial inspection systems and automated quality control platforms utilizing orange-yellow fluorescence for defect detection, surface inspection, and sorting applications benefit from this filter's high transmission and broad spectral acceptance. The wide bandwidth accommodates LED source variations and temperature-induced spectral shifts in production environments. Manufacturing applications including pharmaceutical inspection, food safety screening, and materials quality control rely on consistent filter performance for reproducible results. Plate-Based Assays and Kinetic Measurements: Fluorescence plate readers monitoring enzyme kinetics, binding assays, and cellular responses in real-time require stable, efficient fluorescence detection. The BP560 filter enables accurate quantification of fluorogenic substrate reactions, protein-protein interactions, and cellular signaling events reported by orange fluorophores. The high transmission maximizes signal-to-noise ratios enabling detection of weak signals and small fluorescence changes during kinetic measurements. ### Customization and Engineering Support OPTOStokes recognizes that modern optical systems often require tailored solutions optimized for specific application requirements. Our engineering team collaborates with customers to develop customized filter designs meeting unique performance criteria: Spectral Optimization: While the standard 50nm FWHM provides excellent light collection, bandwidth can be adjusted from 40nm to 70nm depending on application priorities. Narrower bandwidths improve spectral selectivity for multi-channel systems with closely spaced fluorophores, while wider bandwidths further maximize signal strength in photon-starved applications. Center wavelength can be tuned across the 555-565nm range to optimize alignment with specific fluorophore emission maxima or LED source characteristics. Custom passband shapes including flat-top profiles and asymmetric bandwidths can be engineered for specialized requirements. Enhanced Blocking Specifications: For applications requiring deeper out-of-band rejection, we can design filters achieving optical density greater than 3 (transmission less than 0.1%) or optical density greater than 4 (transmission less than 0.01%) in critical spectral regions. Extended blocking ranges covering 350-1300nm accommodate applications with UV excitation sources or near-infrared detection systems. Specific blocking enhancement at excitation wavelengths or adjacent fluorescence channels can be implemented to minimize crosstalk and improve channel separation. Dimensional and Thickness Options: Standard circular formats are available in diameters from 12.5mm to 50mm, with square, rectangular, and custom geometries manufactured to precise specifications. The 1.1mm thickness represents an optimized choice, but can be adjusted to 1.0mm for maximum compactness, 1.5mm for enhanced rigidity, or 2.0mm for applications requiring maximum mechanical stability and thermal mass. Precision edge finishing including beveling and black edge coating minimize scattered light in critical imaging applications. Mounting and Integration Solutions: Filters can be supplied unmounted for adhesive bonding and direct integration, or pre-mounted in threaded retaining rings, drop-in cells, and filter cubes compatible with major microscope manufacturers. Custom mechanical interfaces accommodate legacy equipment and specialized instrumentation. Multi-filter assemblies combining this emission filter with complementary excitation filters and dichroic beamsplitters are available as integrated modules for simplified system assembly and guaranteed spectral compatibility. Environmental Specifications: Applications in demanding environments benefit from enhanced durability specifications including extended temperature ranges from -40°C to +85°C, high humidity resistance up to 95% relative humidity, and vibration tolerance meeting MIL-STD-810 standards. Hard coating formulations ensure durability under repeated cleaning cycles, harsh chemicals, and high-intensity light exposure. UV-resistant materials prevent coating degradation in applications with UV light sources or outdoor deployment. ### Why Choose OPTOStokes? OPTOStokes has established industry leadership in optical filter manufacturing through continuous innovation, quality excellence, and customer-focused service. Our extensive inventory of standard bandpass filters ensures immediate availability for urgent requirements, with most configurations shipping within 24-48 hours of order confirmation. This rapid response capability eliminates project delays and accelerates instrument development timelines. Our manufacturing expertise in wide bandpass filter design addresses the unique challenge of maintaining high transmission across broad spectral ranges while achieving effective out-of-band blocking. Advanced thin-film coating design software and ion-assisted deposition technology enable precise control of spectral characteristics, ensuring consistent performance across production batches. Every filter undergoes comprehensive spectral verification using calibrated spectrophotometers, with full transmission curves from 350-1200nm documented in detailed test reports. Quality assurance encompasses all aspects of filter performance including spectral accuracy, surface quality, dimensional precision, and environmental durability. Automated inspection systems verify scratch-dig specifications per MIL-PRF-13830B standards. Precision metrology confirms thickness tolerances, diameter accuracy, and parallelism. Environmental testing validates coating adhesion, humidity resistance, and temperature stability according to industry standards and customer-specific requirements. Our applications engineering team provides technical consultation throughout the product lifecycle, from initial filter selection through production integration and field support. We maintain comprehensive technical documentation including spectral data files, angular performance characteristics, temperature coefficients, and mechanical drawings to accelerate your development process. Long-term supply agreements ensure consistent filter availability and pricing stability for multi-year production programs. ### Addressing Design Challenges Optical system designers face specific considerations when implementing wide bandpass filters in fluorescence detection systems. Understanding these factors enables optimal filter selection and system performance: Signal-to-Noise Optimization: In photon-limited applications, collecting maximum signal often takes precedence over ultimate spectral resolution. The BP560 filter's 50nm bandwidth collects substantially more photons than narrow 10-20nm alternatives, improving signal-to-noise ratios and enabling shorter integration times. For applications where signal strength is the primary limitation, this wider bandwidth delivers measurably improved detection sensitivity and imaging speed. Our applications team can model expected signal levels for specific fluorophores and recommend optimal bandwidth for your application. Multi-Channel Spectral Separation: In multi-color fluorescence imaging, wider bandpass filters require careful fluorophore selection to prevent spectral overlap. The BP560 filter is designed for yellow-orange fluorophores in the 555-580nm emission range, providing adequate separation from green channels at 510-535nm and red channels at 590-620nm when properly configured. We provide spectral overlap modeling for customer-specified fluorophore combinations, predicting crosstalk levels and recommending optimal channel assignments and filter configurations. Fluorophore Compatibility: Different fluorophores exhibit varying emission spectrum shapes and peak wavelengths. The BP560 filter's broad 555-570nm passband efficiently captures emissions from Cy3 (570nm peak), TRITC (572nm peak), rhodamine B (565nm peak), and Texas Red (615nm peak with significant emission extending into the 560-580nm range). We maintain a comprehensive fluorophore database and can provide compatibility analysis for specific dyes and fluorescent proteins used in your application. Excitation Light Blocking: Yellow-orange fluorophore detection typically employs green-yellow excitation from 530-555nm sources. The BP560 filter provides optical density greater than 2 at typical excitation wavelengths, delivering 100-fold rejection sufficient for most fluorescence microscopy applications. For ultra-sensitive detection with intense excitation sources, enhanced blocking specifications can be implemented to prevent detector saturation and improve background suppression. Compact System Integration: The 1.1mm thickness enables integration into compact filter wheels, motorized filter changers, and multi-position filter assemblies while maintaining adequate mechanical stability. This intermediate thickness provides design flexibility for systems where 1.0mm substrates lack sufficient rigidity but 2.0mm substrates exceed available axial space. Our mechanical engineering team provides integration consultation including tolerance stack-up analysis and mounting recommendations. ### Quality Documentation and Compliance Every BP560-50nm-1.1mm filter manufactured by OPTOStokes undergoes rigorous quality control testing to verify conformance with published specifications. Our ISO 9001:2015 certified quality management system maintains documented procedures for all manufacturing and inspection processes, ensuring consistency and full traceability. Spectral performance verification includes transmission measurements across the full 350-1200nm range with 1nm resolution, documenting peak transmission, FWHM, center wavelength, passband edges, and blocking performance. Multiple measurements across the filter aperture verify coating uniformity. Surface quality inspection employs calibrated dark-field microscopy to verify scratch-dig specifications. Dimensional measurements confirm substrate thickness, diameter tolerances, and edge quality using precision metrology equipment. Documentation packages include detailed spectral test reports with measured transmission curves, certificates of conformance, dimensional inspection results, and material certifications as required. Custom test protocols and enhanced inspection procedures can be implemented to meet specific customer requirements or regulatory compliance needs in medical device, pharmaceutical, or industrial applications. RoHS compliance certification and conflict mineral declarations are provided for customers requiring supply chain transparency and environmental compliance documentation. ### Request Technical Consultation or Quotation The BP560-50nm-1.1mm bandpass filter represents OPTOStokes' commitment to delivering practical optical solutions that address real-world application challenges. Whether your system requires maximum light collection efficiency, compact mechanical integration, or customized spectral characteristics, our team has the expertise and manufacturing capability to support your success. Contact our technical sales team at sales@optofilters.com to discuss your specific requirements, request detailed technical specifications including complete spectral curves and angular performance data, or obtain pricing for prototype or production quantities. Our applications engineers can provide fluorophore compatibility analysis, spectral modeling, multi-channel filter set optimization, and system integration recommendations tailored to your unique application. For immediate access to comprehensive technical resources including spectral data files, mechanical drawings, and application notes, visit www.optofilters.com and explore our complete optical filter catalog. We understand that successful optical instrument development requires more than high-quality components—it demands partnership with suppliers who understand your challenges and share your commitment to innovation and excellence. Experience the OPTOStokes difference: advanced optical filter technology, responsive technical support, and reliable delivery performance. Let us help transform your optical design challenges into competitive advantages with solutions engineered specifically for your success. --- ## BP550nm Bandpass Filter | FWHM 12nm, Thickness 2.0mm **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/187.html **Summary**: BP550 ultra-narrow bandpass filter with 12nm FWHM and 2.0mm substrate. Perfect for Cy3, YFP detection. Exceptional spectral precision. Contact us for pricing. > **Detail Content:** ### BP550nm Bandpass Filter | FWHM 12nm, Thickness 2.0mm The BP550-12nm-2.0mm bandpass filter represents advanced optical engineering for applications demanding exceptional wavelength precision in the yellow-green spectral region. This ultra-narrow bandpass filter features an extraordinarily tight 12nm full width at half maximum (FWHM) centered at 550nm, providing superior spectral discrimination for multi-channel fluorescence microscopy, flow cytometry, and precision spectroscopy applications. With a precisely controlled transmission window spanning just 548-552nm and comprehensive blocking from 350-1100nm at transmission less than 1%, this filter enables clean signal isolation in spectrally crowded detection environments. The robust 2.0mm substrate thickness ensures mechanical stability, thermal performance, and long-term reliability in demanding laboratory and industrial settings. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers the performance and consistency required by leading research institutions and instrument manufacturers worldwide. ### Technical Specifications The BP550-12nm-2.0mm filter achieves exceptional spectral control through precision multi-layer coating design and rigorous manufacturing quality control. The following table provides complete technical specifications: | Parameter | Specification | | | Center Wavelength (CWL) | 550nm ± 2nm at T greater than 90% | | | Transmission Range | 548-552nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 12nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Optical Density (OD) | Greater than 2.0 (equivalent to T less than 1%) | | | Substrate Thickness | 2.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20212247 | | ### Key Performance Features This ultra-narrow 550nm longpass region filter demonstrates exceptional spectral performance optimized for yellow-green wavelength applications. The remarkably narrow 12nm FWHM provides outstanding wavelength selectivity, enabling precise isolation of fluorophore emissions in the densely populated 540-560nm spectral region. This superior spectral resolution is essential for multi-parameter flow cytometry, multi-color fluorescence imaging, and high-resolution spectroscopy where closely spaced emission peaks must be cleanly separated. The precisely controlled transmission window spanning just 548-552nm represents an extraordinarily tight passband, offering wavelength discrimination that exceeds conventional optical filters by significant margins. Peak transmission greater than 90% within this narrow window ensures maximum signal collection efficiency despite the restrictive bandwidth. This combination of narrow passband and high transmission is achieved through advanced coating design algorithms and precision deposition control, resulting in exceptional signal-to-noise ratios for photon-limited detection scenarios. Comprehensive blocking performance with transmission below 1% (optical density greater than 2) extends across the full 350-1100nm spectral range, effectively suppressing UV autofluorescence, rejecting excitation light scatter, blocking adjacent fluorescence channels, and eliminating near-infrared background signals. This broad-spectrum rejection ensures clean signal detection even when operating with intense excitation sources, highly fluorescent samples, or detectors with extended spectral sensitivity. The deep blocking is particularly critical in the 515-545nm and 555-580nm regions where adjacent fluorescence channels commonly reside. The robust 2.0mm substrate thickness provides enhanced mechanical rigidity and thermal stability compared to thinner substrates. This substantial thickness facilitates secure mounting in precision optical assemblies, reduces temperature-induced wavelength drift during operation, and enables reliable performance in high-power laser applications. The increased substrate mass improves thermal dissipation, maintaining spectral stability during extended measurement sessions or temperature-variable experimental protocols. ### Applications The BP550-12nm-2.0mm bandpass filter excels across demanding scientific and industrial applications requiring precise wavelength control in the yellow-green spectral region: Advanced Fluorescence Microscopy: This filter provides optimal performance for detecting yellow-green fluorophores including YFP (Yellow Fluorescent Protein), Cy3, Alexa Fluor 546, TRITC, and rhodamine derivatives. The ultra-narrow 12nm bandwidth enables clean separation from green GFP/FITC channels at 515-530nm and orange/red channels at 570-590nm, essential for multi-color imaging experiments in cell biology, neuroscience, and developmental biology. Super-resolution microscopy techniques including STORM and PALM benefit from the exceptional spectral purity, enabling accurate single-molecule localization without crosstalk from adjacent fluorophore channels. Live-cell imaging applications leverage the high transmission efficiency to minimize excitation power and reduce phototoxicity while maintaining excellent signal detection. Flow Cytometry and High-Parameter Immunophenotyping: Modern flow cytometry panels routinely employ 10-20 fluorescent markers simultaneously, creating extreme spectral crowding in the visible range. The 550nm spectral region is particularly congested with commonly used fluorophores including PE-Cy3, PerCP, and various tandem conjugates. The BP550 filter's 12nm bandwidth provides the spectral precision necessary to isolate specific fluorophore emissions and minimize spillover into adjacent detectors. Clinical diagnostic applications including leukemia/lymphoma classification, immune monitoring, and stem cell characterization rely on this narrow wavelength filter performance for accurate cell population discrimination and quantification. Confocal and Laser Scanning Microscopy: Laser scanning microscopy systems employ narrow bandpass filters to collect fluorescence emissions while rejecting scattered laser light and adjacent fluorescence channels. The BP550 filter efficiently captures Cy3 and rhodamine emissions following 543nm HeNe laser or 532nm DPSS laser excitation, while completely blocking the excitation wavelength and separating from green and far-red detection channels. The 2.0mm substrate thickness withstands high laser power densities encountered in confocal imaging without coating damage or spectral degradation. Spectroscopy and Chemical Analysis: Precision spectroscopy applications including Raman spectroscopy, fluorescence spectroscopy, and absorption spectroscopy utilize narrow bandpass filters for wavelength selection and spectral isolation. The BP550 filter enables accurate measurements in the yellow-green region for applications including chemical sensing, environmental monitoring, and materials characterization. The narrow bandwidth improves spectral resolution, while the deep out-of-band blocking eliminates interference from stray light and background emissions. High-Content Screening and Automated Imaging: Pharmaceutical research and drug discovery platforms employ automated high-content imaging systems for compound screening and cellular phenotyping. These systems often utilize yellow-green fluorescent proteins and dyes for reporting gene expression, protein localization, and cellular responses. The BP550 filter provides the spectral precision necessary for accurate quantification across multi-well plate formats, while the consistent performance ensures reproducible results across extended screening campaigns involving thousands of samples. FRET and Fluorescence Lifetime Imaging: Förster Resonance Energy Transfer (FRET) experiments require precise spectral separation of donor and acceptor emissions. Common FRET pairs including CFP-YFP and GFP-mCherry involve acceptor emissions in the 550nm region. The fluorescence detection capability of the BP550 filter enables accurate quantification of acceptor emission while completely rejecting donor fluorescence, critical for calculating FRET efficiency and measuring molecular interactions in living cells. ### Customization and Engineering Solutions OPTOStokes understands that cutting-edge research and precision instrumentation often demand customized optical solutions tailored to specific application requirements. Our engineering team collaborates with customers to optimize filter designs for unique performance criteria: Spectral Optimization: While the standard 12nm FWHM provides exceptional wavelength discrimination, bandwidth can be further narrowed to 10nm for ultimate spectral resolution in ultra-dense multi-parameter applications, or widened to 15-18nm for applications prioritizing signal collection over spectral purity. Center wavelength can be precisely tuned across the 545-555nm range with sub-nanometer accuracy to match specific fluorophore emission maxima or laser wavelengths. Custom passband profiles including flat-top designs and asymmetric bandwidths can be engineered for specialized applications. Enhanced Blocking Performance: For applications requiring deeper out-of-band rejection, we can design filters achieving optical density greater than 3 (transmission less than 0.1%) or optical density greater than 4 (transmission less than 0.01%) in critical spectral regions. Extended blocking ranges covering 300-1300nm accommodate applications with UV or near-infrared sources. Notch configurations providing high transmission except for narrow rejection bands can be implemented for laser line blocking applications. Geometric and Mounting Customization: Standard circular formats are available in diameters from 12.5mm to 50mm, with square, rectangular, and irregular shapes manufactured to precise specifications. The 2.0mm thickness can be adjusted to 1.0mm for compact integration, 1.5mm for balanced performance, or 3.0mm for maximum rigidity in demanding mechanical environments. Filters can be supplied unmounted for direct integration, or pre-mounted in threaded retaining rings, filter cubes, filter wheels, and custom mechanical assemblies. Black edge coating and anti-reflection coatings on non-filtered surfaces minimize scattered light. Multi-Filter Sets and Matched Components: Complete filter sets combining the BP550 emission filter with matched excitation filters and dichroic beamsplitters are available for simplified microscopy system integration. Filters can be spectrally matched to maintain consistent performance across multi-channel detection systems. Matched sets ensure optimal performance and eliminate the need for individual component specification and compatibility verification. Environmental Hardening: Applications in extreme or variable conditions benefit from enhanced environmental specifications including extended temperature ranges from -40°C to +85°C, high humidity resistance, salt spray tolerance per MIL-STD-810, and vibration resistance. Hermetic sealing options protect coatings in corrosive or contaminated environments. Laser damage threshold testing and certification can be provided for high-power laser applications. ### The OPTOStokes Manufacturing Excellence OPTOStokes has established a reputation for excellence in ultra-narrow bandpass filters through continuous investment in advanced coating technology and quality systems. Our state-of-the-art ion-assisted deposition systems employ real-time optical monitoring and automated layer thickness control, ensuring the sub-nanometer accuracy essential for achieving narrow bandwidth specifications and precise center wavelength positioning. This technological capability enables consistent production of filters with spectral tolerances that exceed industry standards. Every BP550-12nm-2.0mm filter undergoes comprehensive spectral verification using research-grade spectrophotometers with sub-nanometer wavelength resolution and absolute transmission accuracy traceable to NIST standards. Full transmission curves from 300nm to 1200nm are measured at multiple points across the filter aperture, verifying center wavelength uniformity, FWHM consistency, peak transmission, and blocking performance. Statistical process control monitors coating performance across production batches, ensuring long-term consistency for customers requiring matched filter sets or replacement filters maintaining identical characteristics. Quality assurance encompasses all aspects of filter performance including surface quality, dimensional accuracy, and environmental stability. Automated optical inspection systems verify scratch-dig specifications using calibrated dark-field microscopy per MIL-PRF-13830B standards. Precision metrology confirms substrate thickness, diameter tolerances, and parallelism. Environmental testing including temperature cycling, humidity exposure, and coating adhesion verification validates long-term durability and performance stability. Our ISO 9001:2015 certified quality management system maintains comprehensive documentation for all manufacturing processes, inspection procedures, and test results. Detailed test reports including measured spectral curves, surface quality inspection results, and dimensional verification are provided with each shipment. Certificates of conformance document compliance with purchase order specifications and applicable industry standards, supporting customer quality systems and regulatory requirements. ### Overcoming Application Challenges Implementing ultra-narrow bandpass filters in advanced optical systems presents specific technical challenges. Understanding these considerations enables informed specification decisions and optimal system performance: Spectral Crowding in Multi-Channel Systems: The yellow-green spectral region between 530-570nm contains numerous commonly used fluorophores, creating potential for spectral overlap and crosstalk. The BP550 filter's 12nm bandwidth and precise 548-552nm passband provide the spectral resolution necessary to isolate specific emissions. Our applications engineering team performs spectral overlap modeling for customer-specified fluorophore panels, predicting crosstalk levels and recommending optimal filter configurations. Computational analysis identifies potential interference and guides experimental design for minimal spectral overlap. Fluorophore Emission Variability: Fluorophore emission spectra vary with environmental factors including pH, temperature, and molecular interactions. The BP550 filter's center wavelength positioning at 550nm captures the emission maxima of common yellow-green fluorophores while providing tolerance for minor spectral shifts. We can provide fluorophore compatibility analysis and recommend optimal filter specifications for specific experimental conditions. Excitation Light Rejection: Yellow-green fluorophore detection typically employs green-yellow excitation from 530-545nm sources. The BP550 filter must adequately block this excitation light to prevent detector saturation and enable weak fluorescence detection. With optical density greater than 2 at typical excitation wavelengths, this filter provides 100-fold or greater rejection, sufficient for most applications. For ultra-sensitive detection requiring deeper blocking, enhanced OD specifications can be implemented. Temperature-Induced Wavelength Shift: Optical filter wavelength characteristics shift with temperature due to thermal expansion of coating layers. For applications requiring stable performance across variable temperatures, we provide temperature coefficient data (typically 0.01-0.02 nm per degree Celsius) and can design athermal coating formulations minimizing wavelength shift. Temperature-controlled filter housing and active stabilization can be recommended for ultra-critical applications. System Integration and Focal Shift: Inserting filters into optical paths introduces focal shift due to optical path length changes. The 2.0mm substrate thickness results in approximately 0.7mm focal shift (exact value depends on substrate refractive index and optical configuration). Our technical team provides optical path modeling and focal shift calculations to support system design and ensure proper image focus across filter positions. ### Stock Availability and Production Capabilities OPTOStokes maintains substantial inventory of narrowband optics including the BP550-12nm-2.0mm configuration in commonly requested diameters, enabling rapid fulfillment for urgent project requirements. Standard configurations typically ship within 24-48 hours of order confirmation, eliminating project delays associated with lengthy custom manufacturing lead times. For custom specifications or non-standard configurations, our agile manufacturing processes typically deliver prototype quantities within 3-4 weeks, with production volumes following upon customer approval. High-volume production capabilities support OEM customers and instrument manufacturers requiring consistent supply across multi-year production cycles. Automated coating systems and rigorous process control ensure batch-to-batch consistency for production runs spanning thousands of units. Vendor-managed inventory programs and consignment stocking arrangements provide just-in-time availability while minimizing inventory carrying costs. ### Request Technical Consultation or Quotation The BP550-12nm-2.0mm bandpass filter exemplifies OPTOStokes' commitment to advancing optical filter technology through precision engineering and manufacturing excellence. Whether your application requires this exact specification or a customized variant optimized for unique performance criteria, our team possesses the technical expertise and production capability to support your success. Contact our applications engineering specialists at sales@optofilters.com to discuss your specific requirements, request comprehensive technical documentation including complete spectral curves and angular performance data, or obtain quotations for prototype or production quantities. Our team can provide fluorophore compatibility analysis, spectral overlap modeling, multi-channel filter set optimization, and system integration recommendations tailored to your application. For immediate access to technical resources including spectral data files, mechanical drawings, coating specifications, and application notes, visit www.optofilters.com and explore our complete optical filter catalog. We understand that breakthrough scientific research and innovative instrument development demand optical components that deliver uncompromising performance and reliability. Experience the OPTOStokes difference: precision optical engineering, expert technical support, and manufacturing quality you can trust. Partner with us to transform your most demanding optical challenges into competitive advantages through solutions engineered specifically for your success. --- ## ​BP520nm Bandpass Filter | FWHM 13nm, Thickness 2.0mm, OD3+ Blocking **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/186.html **Summary**: BP520 ultra-narrow bandpass filter with 13nm FWHM and OD3+ blocking. Ideal for multi-channel fluorescence and PCR. Exceptional spectral resolution. Request a quote. > **Detail Content:** ### BP520nm Bandpass Filter | FWHM 13nm, Thickness 2.0mm, OD3+ Blocking The BP520-13nm-2.0mm bandpass filter represents the pinnacle of precision optical filtering technology, combining ultra-narrow spectral selectivity with exceptional out-of-band rejection. This advanced bandpass filter features an extraordinarily narrow 13nm full width at half maximum (FWHM) centered at 520nm, delivering unparalleled wavelength discrimination for demanding multi-channel fluorescence applications. With blocking performance exceeding optical density 3.3 (transmission less than 0.05%) across the 350-1100nm range, this filter enables exceptional signal isolation in complex spectral environments. The robust 2.0mm substrate thickness ensures mechanical stability and thermal management for high-power applications. Manufactured by OPTOStokes using state-of-the-art high precision coating technology, this filter meets the most stringent requirements of research laboratories and precision instrument manufacturers worldwide. ### Technical Specifications The BP520-13nm-2.0mm filter achieves exceptional spectral performance through advanced multi-cavity coating design and precision manufacturing processes. The following table details the complete technical specifications: | Parameter | Specification | | | Center Wavelength (CWL) | 520nm ± 2nm at T greater than 90% | | | Transmission Range | 518-524nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 13nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 0.05% | | | Optical Density (OD) | Greater than 3.3 (equivalent to T less than 0.05%) | | | Substrate Thickness | 2.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition, multi-cavity design | | | Part Number | 20216130 | | ### Key Performance Features This green light filter achieves performance levels that position it among the most advanced optical filters available for green spectral region applications. The ultra-narrow 13nm FWHM provides exceptional wavelength discrimination, enabling separation of closely spaced emission lines that would be indistinguishable with conventional 20-30nm bandpass filters. This superior spectral resolution is essential for multi-color fluorescence microscopy, multiplexed PCR detection, and high-resolution spectroscopy applications where spectral overlap between adjacent channels must be minimized. Peak transmission exceeding 90% within the narrow 518-524nm passband ensures maximum signal throughput despite the restrictive bandwidth. This high transmission efficiency is achieved through advanced coating optimization algorithms and precision layer thickness control during deposition. The result is exceptional signal-to-noise ratio in photon-limited applications, where every collected photon contributes to measurement accuracy and detection sensitivity. The extraordinary blocking performance with transmission below 0.05% (optical density greater than 3.3) represents a significant advancement over conventional optical filters typically specified at optical density 3 or 4. This deep blocking extends across the full 350-1100nm range, effectively eliminating UV autofluorescence, suppressing excitation light leakage, blocking adjacent fluorescence channels, and rejecting near-infrared detector noise. The comprehensive rejection ensures clean signal detection even in challenging measurement scenarios involving bright excitation sources, highly concentrated samples, or detectors with broad spectral sensitivity. The robust 2.0mm substrate thickness provides enhanced mechanical stability compared to thinner alternatives, making this filter particularly suitable for high-power laser applications, temperature-variable experimental conditions, and precision optical mounts requiring rigid substrates. The increased thickness improves thermal dissipation, reducing temperature-induced wavelength shifts during extended operation. The substantial substrate also facilitates secure mounting in precision optical assemblies without risking deformation or stress-induced birefringence. ### Applications The BP520-13nm-2.0mm bandpass filter excels in advanced scientific and industrial applications demanding the highest levels of spectral precision and signal purity: Quantitative PCR and Real-Time PCR Detection: This filter provides optimal performance for PCR detection systems utilizing FAM (6-carboxyfluorescein), SYBR Green I, and other green-emitting fluorescent reporters. The ultra-narrow 13nm bandwidth isolates FAM emission at 520nm while completely rejecting crosstalk from blue-shifted dyes like VIC (538nm) and yellow-shifted dyes like HEX (556nm). This precise spectral discrimination enables accurate multiplexed detection in multi-color qPCR assays used for gene expression analysis, SNP genotyping, pathogen detection, and clinical diagnostics. The high OD filter blocking performance ensures that excitation light from 470-490nm blue LEDs is completely suppressed, preventing detector saturation and baseline drift during thermal cycling. Multi-Channel Fluorescence Microscopy: Advanced fluorescence imaging applications utilizing five or more simultaneous fluorescence channels require extremely narrow bandpass filters to prevent spectral crosstalk. The BP520 filter enables precise detection of FITC (Fluorescein Isothiocyanate), GFP (Green Fluorescent Protein), and Alexa Fluor 488 emissions while maintaining complete separation from blue CFP channels and yellow-green TRITC channels. Research applications including super-resolution microscopy, FRET (Fluorescence Resonance Energy Transfer) imaging, and live-cell multi-parameter tracking benefit from the enhanced spectral purity this filter provides. The high optical density blocking eliminates autofluorescence background and scattered excitation light, dramatically improving contrast and enabling visualization of dim cellular structures. Flow Cytometry and High-Parameter Cell Analysis: State-of-the-art flow cytometry systems now routinely analyze 15-30 fluorescence parameters simultaneously, requiring unprecedented spectral resolution to distinguish adjacent fluorophore emissions. The 530nm filter region is particularly crowded in multi-color flow panels, with numerous green-yellow fluorophores clustered between 515-545nm. The BP520 filter's 13nm bandwidth provides the spectral precision necessary to isolate specific fluorophore emissions and minimize compensation requirements. Clinical applications including immunophenotyping, minimal residual disease detection, and rare cell enumeration rely on this filter's performance for accurate cell population discrimination. Laser Line Filtering and Spectral Cleanup: Frequency-doubled Nd:YAG lasers emitting at 532nm and argon-ion lasers with strong 514nm lines require precise wavelength selection and amplified spontaneous emission (ASE) suppression. The BP520 filter effectively isolates the desired laser wavelength while rejecting adjacent plasma lines and broadband ASE background. Raman spectroscopy systems benefit from this filter's deep blocking performance, which prevents laser scatter and sample fluorescence from overwhelming weak Raman signals. Applications include chemical analysis, materials characterization, and pharmaceutical quality control. Plate Reader and High-Throughput Screening Instruments: Automated microplate readers used in drug discovery, enzyme kinetics, and bioassay development require reliable fluorescence detection across 96, 384, or 1536-well formats. The BP520 filter enables accurate quantification of fluorescein-based assays, green fluorescent protein expression, and fluorogenic substrate reactions. The narrow bandwidth reduces well-to-well crosstalk in high-density plates, while the high blocking performance ensures low background readings and extended dynamic range. Pharmaceutical research laboratories conducting compound screening and assay development benefit from the reproducible performance and long-term stability this filter provides. Confocal and Multiphoton Microscopy: Laser scanning microscopy techniques demand exceptional out-of-band blocking to prevent laser scatter and photomultiplier tube damage. The BP520 filter's optical density greater than 3.3 provides robust protection while efficiently transmitting green fluorophore emissions. Two-photon microscopy applications benefit from the extended near-infrared blocking, which suppresses scattered excitation light from 800-1100nm titanium:sapphire and OPO laser sources. ### Customization and Advanced Engineering OPTOStokes recognizes that cutting-edge research instruments and precision analytical systems often require customized optical solutions optimized for specific performance criteria. Our engineering team works collaboratively with customers to develop tailored filter designs: Spectral Fine-Tuning: While the standard 13nm FWHM provides exceptional spectral resolution, bandwidth can be further narrowed to 10nm for ultimate wavelength discrimination in ultra-dense multi-color applications, or widened to 15-18nm for applications prioritizing signal strength over spectral purity. Center wavelength can be precisely tuned across the 515-525nm range with sub-nanometer accuracy to match specific fluorophore emission maxima, laser wavelengths, or LED source characteristics. Multi-band filter designs combining the BP520 passband with complementary blue and red regions are available for simplified multi-color detection systems. Enhanced Blocking Specifications: For applications requiring even deeper out-of-band rejection, we can design filters achieving optical density greater than 4 (transmission less than 0.01%) or optical density greater than 5 (transmission less than 0.001%) in critical spectral regions. Extended blocking ranges covering 300-1300nm accommodate applications with near-infrared laser sources or silicon-based detectors sensitive beyond 1100nm. Dimensional and Mounting Options: Standard circular formats are available in diameters from 12.5mm to 50mm, with square, rectangular, and custom shapes manufactured to precise dimensional tolerances. The 2.0mm thickness can be adjusted to 1.0mm for compact systems, 1.5mm for balanced performance, or 3.0mm for maximum rigidity in demanding mechanical environments. Filters can be supplied unmounted, or pre-mounted in threaded cells, filter cubes, filter wheels, and proprietary mechanical interfaces. Black edge coating eliminates scattered light from filter edges in critical imaging applications. Angular Performance Optimization: Standard filters are optimized for 0-degree angle of incidence, but we can design filters for specific non-zero angles including the common 45-degree dichroic configurations used in fluorescence microscopy filter cubes. Angular performance data including wavelength shift and transmission variation across ±5 degrees can be provided to support tolerance analysis and optical design verification. Environmental and Durability Enhancements: Applications in extreme environments benefit from environmental hardening including extended temperature ranges from -50°C to +100°C, high humidity resistance with salt spray tolerance per MIL-STD-810, and enhanced coating adhesion for vibration and shock resistance. Laser damage threshold testing and certification can be provided for high-power laser applications requiring guaranteed performance at specified power densities. ### The OPTOStokes Quality Advantage OPTOStokes has earned recognition as a premier manufacturer of ultra-narrow bandpass filters through relentless focus on coating precision, spectral accuracy, and manufacturing consistency. Our advanced ion-assisted deposition systems employ real-time optical monitoring and automated thickness control, ensuring layer-by-layer accuracy essential for achieving narrow bandwidth and deep blocking specifications. This technological capability enables us to manufacture filters with spectral tolerances that exceed industry standards. Every filter undergoes comprehensive spectral characterization using research-grade spectrophotometers with sub-nanometer resolution and absolute accuracy traceable to national standards. Full transmission curves from 300nm to 1200nm are measured and documented, verifying center wavelength, FWHM, peak transmission, and blocking performance. Statistical process control monitors coating uniformity across production runs, ensuring batch-to-batch consistency for customers requiring matched filter sets or replacement filters maintaining identical spectral characteristics. Quality assurance extends beyond spectral performance to encompass cosmetic quality, dimensional accuracy, and long-term environmental --- ## BP470nm Bandpass Filter | FWHM 50nm, Thickness 1.0mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/185.html **Summary**: BP470 wide bandpass filter with 50nm FWHM and 1.0mm profile. Maximizes signal throughput for photon-limited applications. High transmission, compact design. Get a quote. > **Detail Content:** ### BP470nm Bandpass Filter | FWHM 50nm, Thickness 1.0mm The BP470-50nm-1.0mm bandpass filter is engineered for applications demanding maximum light throughput in the blue spectral region. Featuring a wide 50nm full width at half maximum (FWHM) centered at 470nm, this bandpass filter delivers exceptional photon collection efficiency for photon-starved detection scenarios, high-speed imaging applications, and broad-spectrum fluorescence measurements. The ultra-compact 1.0mm substrate thickness enables seamless integration into space-constrained optical systems while maintaining superior optical performance. Manufactured by OPTOStokes using advanced high precision coating technology, this filter provides the optimal balance between spectral selectivity and signal strength for demanding research and industrial applications. ### Technical Specifications The BP470-50nm-1.0mm filter features carefully optimized transmission characteristics that maximize signal collection while maintaining effective out-of-band rejection. The following table details the complete technical specifications: | Parameter | Specification | | | Center Wavelength (CWL) | 470nm ± 5nm | | | Transmission Range | 450-490nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 50nm ± 5nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Substrate Thickness | 1.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20224893 | | ### Key Performance Features This blue bandpass filter distinguishes itself through a unique combination of wide spectral bandwidth and compact physical design. The 50nm FWHM provides significantly greater light collection efficiency compared to narrowband alternatives, making it ideal for applications where signal strength is paramount. Peak transmission exceeding 90% across the 450-490nm range ensures maximum photon throughput, critical for time-resolved measurements, high-frame-rate imaging, and weak signal detection. The wide passband accommodates broad-spectrum light sources including blue LEDs with typical 20-30nm spectral widths, enabling efficient light utilization in illumination-critical applications. This characteristic also provides tolerance for LED wavelength variation across production batches and temperature-induced spectral shifts during operation. In fluorescence applications, the wider bandwidth captures more of the fluorophore emission spectrum, increasing detected signal levels and improving signal-to-noise ratios in photon-limited scenarios. Despite the wide passband, the filter maintains exceptional out-of-band blocking with transmission below 1% from 350nm to 1100nm. This comprehensive rejection range eliminates UV autofluorescence, suppresses visible-range crosstalk, and blocks near-infrared interference, ensuring clean signal detection across diverse measurement conditions. The deep blocking performance protects sensitive detectors from saturation and enables accurate quantitative measurements in multi-wavelength systems. The ultra-thin 1.0mm substrate thickness delivers critical advantages for modern optical instrument design. The compact profile minimizes optical path length, reducing focal shift and chromatic aberration in multi-element systems. The reduced thickness enables high-density filter packing in automated filter wheels and enables multiple filter positions within constrained axial spaces. Lower substrate mass facilitates faster switching speeds in motorized selection mechanisms and reduces mechanical bearing loads in precision positioning systems. ### Applications The BP470-50nm-1.0mm bandpass filter excels across applications where maximum light collection, spectral versatility, and compact integration are essential: High-Throughput Fluorescence Screening: Drug discovery platforms, compound screening systems, and high-content imaging instruments require rapid data acquisition from multi-well plates and microfluidic devices. The BP470 filter's wide bandwidth maximizes photon collection from blue fluorophores including CFP, AmCyan, and Pacific Blue, enabling shorter exposure times and higher throughput. The increased signal strength allows lower excitation power, reducing phototoxicity in live-cell assays and photobleaching in fixed samples. Pharmaceutical research laboratories benefit from accelerated screening cycles and improved assay sensitivity. Flow Cytometry and Cell Analysis: Modern flow cytometry systems analyze thousands of cells per second, requiring efficient fluorescence detection at high particle velocities. The wide bandpass characteristics capture maximum emission from blue-shifted fluorescent proteins and synthetic dyes, improving detection sensitivity for rare cell populations and dim markers. Clinical diagnostic applications including immunophenotyping, minimal residual disease monitoring, and stem cell enumeration rely on this filter's high collection efficiency for accurate cell quantification. LED-Based Illumination Systems: Industrial machine vision, optical inspection, and photometric instrumentation increasingly utilize blue LED sources for their efficiency, longevity, and compact form factor. However, LED spectral output typically spans 25-40nm, requiring wider bandpass filters for efficient light utilization. The BP470 filter maximizes transmission of LED output while rejecting ambient lighting and unwanted wavelengths. Applications include surface defect detection, fluorescence-based quality control, photocatalyst evaluation, and photolithography alignment systems. Widefield Fluorescence Microscopy: Traditional widefield microscopy systems prioritize imaging speed and field of view over spectral resolution, making wide bandpass filters ideal for emission collection. The BP470 filter efficiently captures blue fluorophore emissions while providing adequate spectral separation from green and red channels in multi-color imaging. Biological research applications including tissue histology, cellular localization studies, and developmental biology imaging benefit from the enhanced signal levels enabling faster acquisition and reduced photobleaching. Environmental and Water Quality Monitoring: Field-deployable fluorescence sensors for water quality assessment, environmental monitoring, and process control applications utilize blue excitation for detecting organic compounds, petroleum hydrocarbons, and biological contaminants. The wide FWHM bandpass accommodates broad fluorescence emissions from complex environmental samples, while the compact 1.0mm profile enables integration into portable and handheld instrumentation. Optogenetics and Photostimulation: Neuroscience research employing channelrhodopsin and other blue-light-activated proteins requires precise wavelength control for selective neuronal activation. The BP470 filter provides sufficient bandwidth to maximize stimulation efficiency from blue LED or laser sources while blocking wavelengths that could interfere with red-shifted calcium indicators or other fluorescent reporters used for simultaneous monitoring. ### Customization and Engineering Solutions OPTOStokes recognizes that advanced optical systems often require tailored solutions beyond standard catalog specifications. Our engineering team collaborates with customers to optimize filter designs for specific application requirements and integration constraints: Spectral Customization: While the standard 50nm FWHM provides excellent light collection, bandwidth can be adjusted from 40nm to 70nm depending on application requirements. Narrower bandwidths improve spectral selectivity for multi-channel systems, while wider bandwidths further increase signal strength in photon-limited applications. Center wavelength can be tuned across the 460-480nm range to match specific LED sources, laser lines, or fluorophore emission peaks with ±1nm precision. Dimensional Options: Standard circular formats are available in diameters from 12.5mm to 50mm, with square, rectangular, and custom geometries manufactured to fit proprietary optical assemblies. The 1.0mm thickness can be maintained for maximum compactness, or adjusted to 0.7mm for ultra-compact systems or 1.5mm/2.0mm for enhanced mechanical rigidity. Precision edge finishing including beveling, chamfering, and black edge coating options are available to minimize scattered light and facilitate mechanical mounting. Mounting and Integration: Filters can be supplied unmounted for direct bonding and adhesive mounting, or pre-mounted in threaded retaining rings, drop-in cells, and filter cubes compatible with major microscope and instrumentation manufacturers. Custom mechanical interfaces accommodate legacy equipment retrofits and specialized instrumentation. Multi-filter assemblies combining this filter with complementary wavelength ranges can be supplied as integrated modules for simplified system assembly. Environmental Specifications: Applications in demanding environments benefit from enhanced durability specifications including extended temperature ranges from -40°C to +85°C, high humidity resistance up to 95% relative humidity, and vibration tolerance meeting MIL-STD-810 standards. Hard coating formulations ensure durability under repeated cleaning cycles and harsh industrial conditions. UV-resistant edge coatings prevent degradation in high-UV environments. Volume Production Support: OEM customers and instrument manufacturers benefit from our high-volume production capabilities, supply chain management, and quality assurance programs. Automated coating processes ensure batch-to-batch consistency across production runs spanning thousands of units. Vendor-managed inventory programs and consignment stocking arrangements ensure just-in-time availability while minimizing customer inventory carrying costs. ### Why OPTOStokes for Wide Bandpass Filters? OPTOStokes has established industry leadership in optical filter manufacturing through continuous innovation, quality excellence, and customer-focused service. Our extensive inventory of standard bandpass filters ensures immediate availability for urgent requirements, with most configurations shipping within 24-48 hours of order confirmation. This rapid response capability eliminates project delays and accelerates time-to-market for instrument development programs. Our manufacturing expertise in --- ## BP468nm Bandpass Filter | FWHM 18nm, Thickness 1.0mm **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/184.html **Summary**: BP468 ultra-thin bandpass filter with 18nm FWHM and 1.0mm profile. Perfect for space-constrained systems. High transmission, deep blocking. Request a quote today. > **Detail Content:** ### BP468nm Bandpass Filter | FWHM 18nm, Thickness 1.0mm The BP468-18nm-1.0mm bandpass filter represents a breakthrough in compact optical design, combining ultra-narrow spectral selectivity with an exceptionally thin 1.0mm profile. This precision-engineered bandpass filter delivers superior wavelength isolation at 468nm with an 18nm full width at half maximum (FWHM), making it ideal for space-constrained fluorescence microscopy systems, multi-filter optical assemblies, and portable diagnostic instruments. Manufactured by OPTOStokes using advanced high precision coating technology, this filter meets the demanding requirements of modern photonics applications where size, weight, and optical performance are equally critical. ### Technical Specifications The BP468-18nm-1.0mm filter features precisely controlled transmission characteristics optimized for blue wavelength isolation in compact form factor. The following table provides complete technical specifications: | Parameter | Specification | | | Center Wavelength (CWL) | 468nm ± 2nm | | | Transmission Range | 465-475nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 18nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Substrate Thickness | 1.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20217512 | | ### Key Performance Features This blue bandpass filter combines exceptional spectral performance with practical design advantages for modern optical systems. The ultra-narrow 18nm FWHM provides outstanding wavelength selectivity, enabling precise isolation of blue fluorophores and LED sources while minimizing spectral crosstalk in multi-channel detection systems. Peak transmission exceeding 90% within the passband ensures maximum signal throughput, critical for low-light fluorescence applications and photon-starved measurement scenarios. The comprehensive blocking range from 350nm to 1100nm with transmission below 1% effectively eliminates unwanted background signals across the UV, visible, and near-infrared spectral regions. This deep blocking capability dramatically improves signal-to-noise ratios and measurement accuracy in demanding analytical applications. The extended blocking range also prevents detector saturation from out-of-band radiation, protecting sensitive cameras and photomultiplier tubes from damage. The ultra-thin 1.0mm substrate thickness offers critical advantages for space-constrained applications. This compact profile reduces the overall optical path length, minimizing focal shift and aberration introduction in tightly designed optical systems. The reduced thickness enables multiple filters to be stacked in filter wheels and motorized filter changers without exceeding mechanical clearance limits. Additionally, the lower mass facilitates faster switching speeds in automated filter selection mechanisms and reduces bearing loads in precision positioning stages. ### Applications The BP468-18nm-1.0mm bandpass filter excels across diverse scientific and industrial applications demanding both exceptional optical performance and compact integration: Advanced Fluorescence Microscopy: This filter provides optimal spectral matching for blue-shifted fluorophores including BFP (Blue Fluorescent Protein), Alexa Fluor 405, and Pacific Blue. The narrow 18nm bandwidth effectively separates closely spaced emission peaks in multi-color imaging experiments, while the 1.0mm thickness allows seamless integration into compact microscope filter cubes and motorized filter wheels. Research applications span cellular imaging, super-resolution microscopy, and live-cell tracking studies where minimal spectral overlap is essential for accurate quantification. qPCR and Molecular Diagnostics: Real-time PCR instruments utilize this filter for precise fluorescence detection of blue-emitting reporter dyes. The narrow bandwidth isolates specific fluorophore emissions while rejecting scattered excitation light and background fluorescence. Portable diagnostic devices particularly benefit from the compact 1.0mm profile, enabling miniaturized optical detection modules for point-of-care testing, field deployment, and handheld instruments. Clinical laboratories conducting genetic testing, viral load quantification, and pathogen detection rely on this filter's reproducible performance across thousands of thermal cycles. Flow Cytometry and Cell Sorting: Multi-parameter flow cytometry systems require precise wavelength discrimination to simultaneously detect multiple fluorescent markers. The BP468 filter's narrow passband enables accurate signal separation in the crowded blue spectral region, while the thin profile reduces optical path complexity in multi-laser, multi-detector configurations. High-speed cell sorting applications benefit from the filter's high transmission efficiency, maximizing photon collection rates for rare event detection. LED-Based Optical Systems: Industrial inspection systems, machine vision platforms, and photometric instrumentation utilizing 460-470nm LED sources employ this filter to improve wavelength purity and reduce spectral bandwidth. The narrow wavelength filter characteristics enhance measurement precision in colorimetry, reflectance spectroscopy, and fluorescence-based quality control applications. The compact design facilitates integration into handheld spectrometers and portable measurement devices. Laser Line Cleanup and Beam Conditioning: Laser-based analytical instruments including Raman spectroscopy systems and laser-induced fluorescence detectors use this filter for wavelength selection and amplified spontaneous emission (ASE) suppression. The deep out-of-band blocking prevents spurious signals from degrading spectral measurements, while the thin substrate minimizes beam displacement in precision optical alignments. ### Customization and Engineering Support OPTOStokes recognizes that cutting-edge optical systems often demand customized solutions tailored to specific application constraints. Our engineering team collaborates directly with customers to optimize filter designs for unique performance requirements and integration challenges: Dimensional Customization: While standard circular formats are available in diameters from 12.5mm to 50mm, we manufacture square, rectangular, and irregular shapes to fit proprietary optical assemblies. The 1.0mm thickness can be maintained across custom geometries, or adjusted to 0.7mm, 1.5mm, or 2.0mm depending on mechanical strength requirements and optical design constraints. Precision edge grinding and beveling options ensure optimal fitment in tight tolerance assemblies. Mounting Solutions: Filters can be supplied unmounted for direct bonding and OEM integration, or pre-mounted in threaded retaining rings, filter cubes, and slide-in frames compatible with major microscope and spectroscopy manufacturers. Custom mechanical interfaces accommodate specialized instrumentation and legacy equipment retrofits. Spectral Fine-Tuning: The center wavelength can be adjusted across the 460-475nm range to precisely match specific LED sources, laser lines, or fluorophore emission peaks. FWHM can be narrowed to 15nm for enhanced spectral resolution, or widened to 25nm for increased light throughput in photon-limited applications. Multi-cavity coating designs enable complex transmission profiles including dual-band and notch filter characteristics. Environmental Hardening: Applications in extreme conditions benefit from enhanced environmental specifications including extended temperature ranges (-40°C to +85°C), high humidity resistance, salt spray tolerance, and vibration resistance meeting MIL-STD-810 standards. Hard coating formulations ensure durability in harsh industrial environments and field deployment scenarios. ### The OPTOStokes Advantage OPTOStokes has established a reputation for excellence in optical filter manufacturing through unwavering commitment to quality, innovation, and customer success. Our extensive inventory of standard bandpass filters ensures rapid availability, with many configurations shipping within 24-48 hours of order placement. This responsiveness eliminates the project delays and schedule risks associated with lengthy custom manufacturing lead times. Our state-of-the-art manufacturing facilities employ advanced ion-assisted deposition technology and computer-controlled coating processes, achieving spectral tolerances and surface quality specifications that exceed industry standards. Every filter undergoes rigorous quality inspection including spectrophotometric verification, surface quality evaluation, and dimensional measurement. Detailed test certificates documenting measured performance are provided with each shipment, ensuring full traceability and compliance with quality management systems. Beyond superior products, OPTOStokes provides comprehensive technical support throughout the product lifecycle. Our optical engineering team assists with filter selection, optical design consultation, and integration troubleshooting. We maintain detailed technical documentation including spectral data files, mechanical drawings, and application notes to accelerate your development process. Long-term supply agreements and engineering change control procedures ensure consistent performance across production runs spanning months or years. ### Overcoming Common Design Challenges Optical system designers frequently encounter specific challenges when implementing narrow bandpass filters in compact assemblies. Understanding these issues enables informed specification decisions and optimal system performance: Space Constraints: Modern instruments increasingly demand miniaturization without performance compromise. The BP468 filter's 1.0mm thickness addresses this challenge directly, reducing optical path length by 50% compared to conventional 2.0mm substrates. This enables tighter component spacing, more compact enclosures, and reduced instrument footprint—critical advantages for portable devices, endoscopic systems, and multi-channel detector arrays. Filter Wheel Integration: Motorized filter wheels in automated microscopy and spectroscopy systems have limited axial space for filter stacks. Thinner filters allow more filter positions within the same wheel diameter, or enable faster switching speeds through reduced rotational inertia. The BP468 filter's compact profile facilitates 8-position or 10-position wheel designs where 2.0mm filters would limit capacity to 6 positions. Spectral Resolution Requirements: Separating closely spaced fluorophores or analyzing fine spectral features demands narrow bandpass filters. However, excessively narrow bandwidths can reduce signal strength in photon-limited applications. The 18nm FWHM specification represents an optimized balance, providing excellent wavelength selectivity while maintaining practical transmission efficiency. Our engineering team can model expected signal levels and recommend optimal bandwidth for your specific application. Long-Term Availability: Instrument manufacturers require consistent filter supply over multi-year production cycles. OPTOStokes maintains production capability for standard products and implements controlled engineering change processes for custom designs. We archive coating recipes, maintain raw material stocks, and provide guaranteed availability periods to support your long-term production planning. Cost-Performance Optimization: Achieving narrow bandpass performance traditionally required complex multi-cavity coating designs with associated cost premiums. OPTOStokes' manufacturing efficiency and coating expertise deliver exceptional performance at competitive pricing. Volume pricing programs and multi-year agreements provide additional cost advantages for production applications. ### Quality Assurance and Compliance Every BP468-18nm-1.0mm filter manufactured by OPTOStokes undergoes comprehensive quality control testing to ensure conformance with published specifications. Our quality management system maintains ISO 9001:2015 certification, with documented procedures covering incoming material inspection, in-process monitoring, and final product verification. Spectral transmission measurements are performed using calibrated spectrophotometers traceable to national standards, ensuring measurement accuracy and reproducibility. Surface quality inspection employs dark-field illumination and calibrated microscopy to verify scratch-dig specifications per MIL-PRF-13830B. Dimensional measurements confirm thickness, diameter, and edge quality tolerances. Environmental testing validates coating adhesion, humidity resistance, and temperature stability according to relevant industry standards. Documentation packages include detailed test reports, certificates of conformance, and material safety data sheets. Custom test protocols and enhanced inspection procedures can be implemented to meet specific customer requirements or regulatory compliance needs in medical, aerospace, or defense applications. ### Request Technical Information or Quotation The BP468-18nm-1.0mm bandpass filter exemplifies OPTOStokes' commitment to advancing optical filter technology through innovative design and manufacturing excellence. Whether your application requires this exact specification or a customized variant optimized for unique performance criteria, our team is prepared to support your success. Contact our technical sales specialists at sales@optofilters.com to discuss your project requirements, request detailed technical specifications, or obtain pricing information. Our engineers can provide spectral modeling, integration guidance, and application-specific recommendations to ensure optimal filter selection. For immediate access to technical resources including complete spectral data, mechanical drawings, and application notes, visit www.optofilters.com and explore our comprehensive product catalog. We understand that successful optical instrument development requires more than precision components—it demands partnership with suppliers who share your commitment to innovation and quality. Experience the OPTOStokes difference: cutting-edge optical technology, responsive technical support, and delivery performance you can trust. Let us help you transform your optical design challenges into competitive advantages. --- ## BP460nm Bandpass Filter | FWHM 20nm, Thickness 2.0mm **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/183.html **Summary**: BP460 bandpass filter with 20nm FWHM and 2.0mm thickness. Ideal for fluorescence microscopy and PCR detection. High transmission, deep blocking. Contact us today. > **Detail Content:** ### The BP460-20nm-2.0mm bandpass filter is a precision-engineered bandpass filter designed for applications demanding superior wavelength selectivity in the blue spectral region. With a center wavelength of 460nm, a narrow 20nm full width at half maximum (FWHM), and a robust 2.0mm substrate thickness, this filter delivers exceptional optical performance for fluorescence microscopy, PCR detection systems, and advanced imaging applications. Manufactured by OPTOStokes using high precision coating technology, this filter meets the stringent requirements of research and industrial users worldwide. ### Technical Specifications The BP460-20nm-2.0mm filter features precisely controlled transmission characteristics optimized for blue light isolation. The following table outlines the complete technical specifications: | Parameter | Specification | | | Center Wavelength (CWL) | 460nm ± 2nm at T greater than 90% | | | Transmission Range | 457-469nm at T greater than 90% | | | Full Width at Half Maximum (FWHM) | 20nm ± 2nm | | | Blocking Range | 350-1100nm at T less than 1% | | | Substrate Thickness | 2.0mm | | | Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B | | | Coating Type | Hard ion-assisted deposition | | | Part Number | 20212858 | | ### Key Performance Features This BP460nm filter demonstrates several critical performance attributes that distinguish it from conventional optical filters. The transmission efficiency exceeds 90% within the designated passband, ensuring maximum signal throughput for light-sensitive detection systems. The narrow 20nm FWHM provides excellent spectral resolution, enabling precise separation of closely spaced emission lines in multi-channel fluorescence applications. The extended blocking range from 350nm to 1100nm with transmission below 1% effectively suppresses unwanted background signals and stray light, dramatically improving signal-to-noise ratios in demanding measurement environments. The 2.0mm substrate thickness offers enhanced mechanical stability and thermal management compared to thinner alternatives, making this filter particularly suitable for high-power laser applications and temperature-variable experimental setups. The durable hard coating withstands repeated cleaning cycles and environmental exposure without performance degradation, ensuring long-term reliability in production environments. ### Applications The BP460-20nm-2.0mm bandpass filter excels in numerous scientific and industrial applications where precise blue light filtering is essential: Fluorescence Microscopy: This filter is ideally suited for excitation or emission filtering of blue fluorophores including DAPI, Hoechst dyes, and CFP (Cyan Fluorescent Protein). The narrow bandwidth minimizes spectral crosstalk in multi-color imaging experiments, while the high transmission maximizes fluorescence signal detection. Research laboratories conducting cell biology, neuroscience, and pathology studies benefit from the enhanced contrast and reduced autofluorescence background this filter provides. PCR Detection and qPCR Systems: Real-time polymerase chain reaction instruments rely on accurate fluorescence detection for quantitative DNA amplification monitoring. The BP460 filter's precise wavelength control and deep blocking characteristics enable reliable detection of FAM, SYBR Green, and other blue-emitting fluorescent reporters used in molecular diagnostics, genetic testing, and pharmaceutical development. The filter's thermal stability ensures consistent performance across multiple thermal cycling protocols. Machine Vision and Industrial Inspection: Quality control systems utilizing blue LED illumination or 450-470nm laser diode sources benefit from this filter's ability to isolate specific wavelengths while rejecting ambient lighting interference. Applications include defect detection, surface inspection, and fluorescence-based sorting systems in manufacturing environments. Spectroscopy and Chemical Analysis: Researchers conducting absorption spectroscopy, Raman spectroscopy, and photoluminescence measurements in the blue spectral region utilize this filter for wavelength selection and laser line cleanup. The deep blocking ensures accurate spectral measurements without interference from out-of-band radiation. ### Customization and Service Excellence OPTOStokes recognizes that modern optical systems often require customized solutions beyond standard catalog specifications. Our engineering team works directly with customers to modify this filter design for specific application requirements. Available customization options include: Geometric Configurations: While standard circular formats are available in diameters ranging from 12.5mm to 50mm, we also manufacture square, rectangular, and custom-shaped filters to fit proprietary optical assemblies. Precision dicing and edge finishing ensure seamless integration into filter wheels, cube assemblies, and automated switching mechanisms. Mounting Options: Filters can be supplied unmounted for OEM integration, or mounted in threaded rings, filter cubes, or filter cubes compatible with major microscope manufacturers. Custom mechanical interfaces are available for specialized instrumentation. Spectral Tuning: The center wavelength and FWHM can be adjusted to match specific laser lines, LED sources, or fluorophore emission peaks. Multi-band configurations combining this filter with complementary wavelength regions are also available for multiplexed detection systems. Environmental Specifications: For applications in extreme conditions, we offer enhanced environmental performance including extended temperature ranges, humidity resistance, and vibration tolerance suitable for field deployment and aerospace applications. ### Why Choose OPTOStokes? OPTOStokes has established itself as a trusted partner for optical filter solutions through our commitment to three core principles: comprehensive inventory, technical excellence, and responsive service. Our extensive stock of bandpass filters ensures rapid fulfillment of standard requirements, with many configurations shipping within 48 hours of order confirmation. This eliminates the lengthy lead times that often delay critical research projects and production schedules. Our manufacturing capabilities leverage state-of-the-art thin-film deposition technology and rigorous quality control processes. Every filter undergoes spectral performance verification using calibrated spectrophotometry before shipment, with detailed test reports provided upon request. This attention to quality has earned OPTOStokes ISO 9001 certification and a reputation for reliability among leading research institutions and Fortune 500 manufacturers. Beyond product quality, our technical support team provides expert guidance throughout the specification and implementation process. Whether you need assistance selecting the optimal filter configuration for a new application or troubleshooting performance issues in an existing system, our optical engineers are available to ensure your success. ### Addressing Common Challenges Optical system designers frequently encounter several challenges when implementing narrowband filters in blue spectral regions. Understanding these issues helps ensure optimal filter selection and system performance: Lead Time Constraints: Many specialty filter manufacturers require 8-12 weeks for custom production, creating bottlenecks in instrument development and production ramp-up. OPTOStokes maintains substantial inventory of commonly requested specifications, enabling same-week delivery for urgent requirements. Our streamlined custom manufacturing process also reduces production cycles to 3-4 weeks for non-standard configurations. Technical Support Gaps: Selecting the appropriate filter parameters requires deep understanding of both optical theory and application-specific requirements. Our applications engineering team collaborates with customers during the design phase, providing spectral modeling, compatibility verification, and optimization recommendations. This consultative approach prevents costly specification errors and accelerates time-to-market. Quality Consistency: Batch-to-batch variation in filter performance can compromise instrument calibration and measurement reproducibility. OPTOStokes employs statistical process control and maintains detailed production records, ensuring consistent spectral characteristics across repeat orders. Our filter designs also incorporate generous tolerance margins to maintain performance despite minor manufacturing variations. Integration Complexity: Mechanical mounting, angular sensitivity, and thermal management can complicate filter integration into compact optical assemblies. We provide detailed mechanical drawings, optical specifications at multiple angles of incidence, and thermal performance data to facilitate smooth integration. Custom mounting solutions eliminate design iterations and reduce assembly complexity. ### Request a Quote or Technical Consultation The BP460-20nm-2.0mm bandpass filter represents just one example of OPTOStokes' comprehensive optical filter portfolio. Whether your application requires this exact specification or a customized variant optimized for your unique requirements, our team is ready to assist. Contact our sales and engineering specialists at sales@optofilters.com to discuss your project requirements, request detailed specifications, or obtain a quotation. For immediate assistance, visit www.optofilters.com to explore our complete product catalog and access technical resources including spectral data, application notes, and integration guides. We understand that successful optical system development requires more than just quality components—it demands partnership with suppliers who understand your challenges and share your commitment to excellence. Experience the OPTOStokes difference: superior products, expert support, and delivery you can depend on. --- ## 455nm High-Transmission Bandpass Filter | 25nm FWHM | T<1% Blocking **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/182.html **Summary**: OPTOStokes 455nm Bandpass Filter: 25nm FWHM, T>90%, and T<1% wideband blocking. Essential for blue light fluorescence & imaging. In-stock & custom options. > **Detail Content:** ### 455nm High-Transmission Bandpass Filter | 25nm FWHM | T 90%) | | | Full Width at Half Maximum (FWHM) | 25 ±3 nm | | | Transmission Band (T_avg) | 450-460 nm at T_avg > 90% | | | Blocking Band | 350-1100 nm at T_avg < 1% (OD > 2) | | | Thickness | 1.1 mm | | | Surface Quality | 60/40 (MIL-PRF-13830B) | | ### Typical Applications With its high transmission and excellent off-band rejection, this 455nm component is critical for fluorescence-based instruments. It is commonly used as a precise excitation filter in fluorescence microscopy filters and life science diagnostic platforms. Key applications include: Excitation source filtering for various blue-light fluorophores. Medical and clinical diagnostic equipment (e.g., PCR, immunoassay). Machine vision and industrial sensor applications requiring 455nm blue light analysis. ### Customization and In-Stock Solutions OPTOStokes supports your project from R&D prototyping to volume production. We maintain an extensive inventory of standard filters, like P/N 20207658, for immediate shipment, minimizing your development downtime. We provide comprehensive custom optical filters services. Our engineering team can produce this filter in custom shapes (round, square, or complex geometries), sizes, or mounted in assemblies to meet your exact mechanical requirements. All components leverage our world-class optical coating technology, ensuring world-class precision, guaranteed quality, and reliable lead times for your production schedule. ### Partner with OPTOStokes for Reliability Eliminate procurement risks associated with variable quality or unreliable lead times. OPTOStokes guarantees high-quality, high-performance components for both standard and custom specifications. To discuss your technical requirements, request a custom modification, or confirm stock for P/N 20207658, please contact our engineering team directly. Email us at sales@optofilters.com for a rapid technical consultation or quote. --- ## 430nm Mid-Bandpass Filter | 30nm FWHM | Wideband T<1% Blocking **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/181.html **Summary**: Get the OPTOStokes 430nm Bandpass Filter. Featuring 30nm FWHM, T>90%, and T<1% wideband blocking. Reliable for fluorescence and medical diagnostics. > **Detail Content:** ### 430nm Mid-Bandpass Filter | 30nm FWHM | Wideband T 90%) | | | Full Width at Half Maximum (FWHM) | 30 ±3 nm | | | Transmission Band (T_avg) | 420-440 nm at T_avg > 90% | | | Blocking Band | 350-1100 nm at T_avg < 1% (OD > 2) | | | Thickness | 1.0 mm | | | Surface Quality | 60/40 (MIL-PRF-13830B) | | ### Typical Applications The 430nm CWL and 30nm bandwidth make this filter highly versatile for fluorescence microscopy filters and clinical diagnostics. It is frequently employed for applications involving blue-light excitation or emission, where a balance between high throughput and moderate selectivity is needed. Typical uses include: Fluorescence analysis and detection systems. Clinical chemistry and immunoassay instruments. Colorimetry and photometric sensors. ### Customization and In-Stock Solutions OPTOStokes supports your project from R&D prototyping to volume production. We maintain an extensive inventory of standard filters, like P/N 20207778, for immediate shipment, minimizing your development downtime. Our capability in custom optical filters is unmatched. Our engineering team can produce this filter in custom shapes, sizes, or mounted in assemblies to meet your exact mechanical requirements. All components feature our world-class optical coating technology, ensuring world-class precision, guaranteed quality, and reliable lead times for your production schedule. ### Partner with OPTOStokes for Reliability Eliminate procurement risks associated with variable quality or unreliable lead times. OPTOStokes guarantees high-quality, high-performance components for both standard and custom specifications. To discuss your technical requirements, request a custom modification, or confirm stock for P/N 20207778, please contact our engineering team directly. Email us at sales@optofilters.com for a rapid technical consultation or quote. --- ## 423nm Narrowband Filter | 15nm FWHM | T<1% Blocking **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/180.html **Summary**: Shop the OPTOStokes 423nm Bandpass Filter. With a 15nm FWHM, T>90%, and T<1% (350-1100nm) blocking. Ideal for fluorescence. In-stock & custom. > **Detail Content:** ### 423nm Narrowband Filter | 15nm FWHM | T 90%) | | | Full Width at Half Maximum (FWHM) | 15 ±2 nm | | | Transmission Band (T_avg) | 420-426 nm at T_avg > 90% | | | Blocking Band | 350-1100 nm at T_avg < 1% (OD > 2) | | | Thickness | 2.0 mm | | | Surface Quality | 60/40 (MIL-PRF-13830B) | | ### Typical Applications The precise 15nm bandwidth and 423nm CWL make this filter ideal for systems requiring specific violet wavelength isolation. It is highly effective in fluorescence microscopy filters sets, particularly for exciting specific fluorophores used in cellular imaging (e.g., calcium flux studies) and flow cytometry. It is also a critical component for spectral analysis in spectroscopy and for cleaning up the signal from 423nm laser diode sources. ### Customization and In-Stock Solutions OPTOStokes supports your project from R&D prototyping to volume production. We maintain an inventory of standard filters, like P/N 20216318, for immediate shipment, minimizing your development downtime. We also provide comprehensive custom optical filters services. Our engineering team can produce this filter in custom shapes (round, square, or complex geometries), sizes, or mounted in custom assemblies to meet your exact mechanical requirements. All components feature our world-class optical coating technology, ensuring precision, guaranteed quality, and reliable lead times for your production schedule. ### Partner with OPTOStokes Avoid project delays from inconsistent suppliers or long lead times. Our manufacturing ensures high-quality, reliable components for both standard and custom specifications. To discuss your technical requirements, request a custom modification, or confirm stock for P/N 20216318, please contact our engineering team directly. Email us at sales@optofilters.com for a rapid technical consultation or quote. --- ## 405nm Narrowband Filter | 15nm FWHM | T<1% Blocking **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/179.html **Summary**: Explore the OPTOStokes 405nm Bandpass Filter. Features a 15nm FWHM, T>80%, and wideband blocking. Ideal for laser line separation. In-stock or custom. > **Detail Content:** ### 405nm Narrowband Filter | 15nm FWHM | T 85%) | | | Full Width at Half Maximum (FWHM) | 15 ± 2 nm | | | Transmission Band (T_avg) | 400-410 nm at T_avg > 80% | | | Blocking Band | 350-1100 nm at T_avg < 1% (OD > 2) | | | Thickness | 1.0 mm | | | Surface Quality | 60/40 (MIL-PRF-13830B) | | ### Typical Applications The precise 15nm bandwidth makes this filter ideal for isolating 405nm diode laser lines, ensuring spectral purity in laser-based systems. It is highly effective for "laser cleanup" in applications such as 3D printing, photolithography, and Raman spectroscopy. Furthermore, the 405nm wavelength is a standard excitation source in life sciences. This filter is widely used in fluorescence microscopy (e.g., for DAPI or Hoechst stains) and flow cytometry instrumentation to separate excitation light from the emission signal. ### Customization and In-Stock Solutions OPTOStokes supports your project from R&D prototyping to volume production. We maintain an inventory of standard filters, like P/N 20209868, for immediate shipment, minimizing your development downtime. We also provide comprehensive custom solutions. Our engineering team can produce this filter in custom shapes (round, square, or complex geometries), sizes, or mounted in custom assemblies to meet your exact mechanical requirements. All components feature our world-class optical coating technology, ensuring precision, guaranteed quality, and reliable lead times for your production schedule. ### Partner with OPTOStokes V Avoid project delays from inconsistent suppliers or long lead times. Our manufacturing ensures high-quality, reliable components for both standard and custom specifications. To discuss your technical requirements, request a custom modification, or confirm stock for P/N 20209868, please contact our engineering team directly. Email us at sales@optofilters.com for a rapid technical consultation or quote. --- ## 470nm Bandpass Filter | 30nm FWHM | Deep OD6 Blocking **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/178.html **Summary**: Discover the OPTOStokes 470nm Bandpass Filter. Featuring a 30nm FWHM and deep OD6 blocking, it's ideal for fluorescence imaging & diagnostics. In-stock or custom. > **Detail Content:** ### 470nm Bandpass Filter | 30nm FWHM | Deep OD6 Blocking Engineered for high-precision signal isolation, this blue bandpass filter is optimized for the 470nm wavelength. It delivers exceptionally high transmission—greater than 90 percent—within the target passband (460-480nm) while providing superior, deep-band blocking outside this critical range. This ensures maximum signal capture while eliminating unwanted noise. ### Technical Specifications | Center Wavelength (CWL) | 470 ± 2 nm | | | Full Width at Half Maximum (FWHM) | 30 ± 2 nm | | | Transmission Band (T_avg) | 460-480 nm at T_avg > 90% | | | Blocking Range 1 | 350-440 nm at OD_avg > 6 | | | Blocking Range 2 | 497.5-800 nm at OD_avg > 6 | | | Blocking Range 3 | 800-1050 nm at OD > 3 | | | Angle of Incidence (AOI) | 0° | | | Thickness | 1.0 mm | | ### Typical Applications The excellent signal-to-noise ratio, achieved through deep blocking (average Optical Density greater than 6), makes this component ideal for demanding instrumentation applications. Key areas include high-sensitivity fluorescence detection, microscopy optics, and specific spectroscopy systems. The 470nm CWL is essential for isolating signals from specific fluorophores or LEDs. It is also frequently specified for quantitative PCR detection systems and other medical diagnostic instruments where precise wavelength isolation and high signal purity are critical for accurate results. ### Customization and In-Stock Solutions OPTOStokes supports your project from R&D prototyping to volume production. We maintain an extensive inventory of standard bandpass filters for immediate shipment, minimizing your development downtime. We also provide comprehensive custom optical filters services. Our engineering team can produce this filter in custom shapes (round, square, or complex geometries), sizes, or mounted in custom assemblies to meet your exact mechanical requirements. All components leverage our world-class optical coating technology, ensuring world-class precision, guaranteed quality, and reliable lead times for your production schedule. ### Partner with OPTOStokes Eliminate project delays caused by inconsistent supply chains or technical limitations. Our manufacturing process ensures world-class quality and dependable delivery for both in-stock and custom orders. To discuss your technical requirements for this high OD bandpass filter, request custom specifications, or confirm stock availability, please contact our engineering team directly. Email us at sales@optofilters.com for a rapid technical consultation or quote. --- ## LP920 Longpass Filter | 920nm Cutoff, Greater than 90 Percent NIR Transmission **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/177.html **Summary**: Optimize your IR/NIR system with OPTOStokes' LP920 longpass filter. Guaranteed $>90\%$ transmission from $920-1100\text{nm}$ and deep $350-900\text{nm}$ blocking. Request custom sizing or purchase in-stock units today. > **Detail Content:** ### LP920 Longpass Filter | 920nm Cutoff, Greater than 90 Percent NIR Transmission The OPTOStokes LP920-0.55mm Longpass Filter is engineered for demanding Near-Infrared (NIR) applications where high throughput and robust out-of-band rejection are critical. This filter is the ideal choice for effectively isolating NIR signals while maintaining exceptional image clarity and low system noise. Our advanced thin film coatings ensure world-class quality and performance, giving you a competitive edge in your technical design. ### Technical Specifications: LP920-0.55mm (Part No. 21105548) | Parameter | Specification | Notes | | | Product Type | Longpass Filter (LP) | 920nm Cutoff Wavelength | | | Transmission Band | 920nm to 1100nm | Transmission greater than 90 percent | | | Blocking Band | 350nm to 900nm | Transmission less than 1 percent (OD greater than or equal to 2.0) | | | Substrate Thickness | 0.55mm | Thin profile for compact systems | | | Surface Quality | 60/40 Scratch-Dig | Per MIL-PRF-13830B standard | | ### Typical Applications: High-Performance NIR Imaging and Sensing The LP920's precise spectral characteristics make it indispensable for numerous scientific and industrial fields. Key applications include: **NIR Imaging Systems:** Enhancing contrast and detail in security, surveillance, and industrial inspection by eliminating visible light noise. **Medical Diagnostics:** Used in specialized optical instruments for non-invasive testing and tissue analysis in the NIR spectrum. **Spectroscopy:** Isolating specific NIR measurement signals for precise quantitative analysis. **Laser & LED Cleanup:** Suppressing unwanted short-wavelength pump light or spontaneous emission. Our commitment to infrared optics means you receive components engineered for maximum efficiency. ### Customization, Stock, and OPTOStokes Guarantee At OPTOStokes, we understand that time-to-market and component reliability are critical. We offer an extensive in-stock selection for immediate prototyping and are experts in high-level customization for volume projects. Whether you require a square, circular, or complex non-standard shape, our custom coatings team is ready to support your most unique design needs, including mounted or unmounted options. Guaranteed Quality: Avoid project delays caused by unreliable suppliers. OPTOStokes guarantees reliable lead times and world-class product quality and precision, ensuring your project stays on track and within technical tolerance. ### Your Optical Challenge, Our Expertise (Contact Us) Are you facing bottlenecks with long lead times, inconsistent quality, or lack of expert technical support? Choosing the right optical filter is crucial for system performance. Leverage our 30+ years of industry experience. For immediate stock checks, technical consultation, or a custom quote, please contact our technical sales team directly. Email us: sales@optofilters.com | Visit: www.optofilters.com --- ## DM700 Dichroic Mirror: 700 nm Cut-Off for NIR Fluorescence & Laser Sorting **Type**: Products **URL**: https://www.optofilters.com/DichroicMirror/176.html **Summary**: OPTOStokes DM700 Dichroic Mirror offers high transmission ($>95\%$ T) from 715-900nm and deep blocking ($<1\%$ T) from 350-675nm at 45° AOI. Perfect for near-IR imaging systems. > **Detail Content:** ### DM700 Dichroic Mirror: 700 nm Cut-Off for NIR Fluorescence & Laser Sorting The OPTOStokes **DM700 Dichroic Mirror** is a premium 45° angle of incidence (AOI) optical filter, expertly designed for high-efficiency spectral separation at the critical 700 nm threshold. This mirror is essential for next-generation systems in biomedical imaging, particularly those utilizing Near-Infrared (NIR) fluorescence, where maximizing NIR signal collection while deeply rejecting visible excitation light is paramount. ### Critical Technical Specifications Engineered on a thin 1.1 mm substrate, the DM700 is optimized for minimal beam displacement and seamless integration into standard optical cubes and compact OEM systems. | Parameter | Specification | | | Nominal Cut-off Wavelength | 700 nm | | | Incidence Angle (AOI) | 45° (Degrees) | | | Transmission Performance (T) | > 95% T from 715 nm to 900 nm | | | Reflection/Blocking Performance (R) | > 99% R or T < 1% from 350 nm to 675 nm | | | Substrate Thickness | 1.1 mm (Thin Substrate) | | ### High-Performance Red-Edge Separation The **DM700 beam splitting filter** functions as a highly selective spectral switch. At the standard 45° AOI, it ensures optimal separation efficiency: Deep Rejection (Reflection): Wavelengths from the UV up to the deep red (350 nm - 675 nm) are strongly reflected (> 99% R). This is crucial for reflecting red laser excitation sources (e.g., 635 nm or 660 nm) toward the sample. High NIR Throughput (Transmission): The NIR light above 715 nm is transmitted with an **Extremely High Efficiency** (> 95% T), ensuring maximum collection of faint NIR fluorescence signals. System Integration: The thin 1.1 mm glass thickness minimizes aberrations and is ideal for systems where multiple filters are stacked or positioned close to the image plane. ### Core Applications The DM700 is widely used in systems requiring precise isolation of NIR light from visible laser interference: NIR Optics Fluorescence Imaging: Perfect for collecting emission signals from NIR dyes (700 nm to 900 nm range), such as Indocyanine Green (ICG) or other IR-markers, while reflecting the shorter excitation light. Laser Line Clean-up and Sorting: Used in flow cytometry and analytical instruments to combine or separate visible lasers (reflected) from NIR detection channels (transmitted). Red Laser Combination: Acts as a key beam splitter in multi-laser confocal systems to manage 660 nm or 635 nm laser paths. ### OPTOStokes Quality and Customization OPTOStokes provides industry-leading **DM700 Dichroic Mirrors** with guaranteed spectral performance and robust, durable custom coatings. Our 45° AOI design is available in various standard sizes from stock to support rapid development and high-volume manufacturing. If your application demands unique specifications—such as a different cut-off wavelength (+/- 10 nm), alternative AOI (0° to 50°), or custom sizing—our specialized high precision coating capabilities allow us to deliver precise, on-spec solutions that accelerate your product launch. Facing a complex NIR optical design challenge? Discuss your specifications with our experts. Ensure your system achieves optimal signal-to-noise ratio and unmatched efficiency by partnering with OPTOStokes. Email: sales@optofilters.com | Visit: www.optokens.com --- ## LP910nm Longpass Filter | 1.1mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/171.html **Summary**: The OPTOStokes LP910nm longpass filter provides >90% transmission from 910–1100nm and deep blocking below 880nm, ideal for near-infrared imaging and sensing applications. > **Detail Content:** ### LP910nm Longpass Filter | 1.1mm Thickness The OPTOStokes LP910nm Longpass Filter is optimized for near-infrared (NIR) imaging and laser detection applications. It delivers high transmission above 910nm while maintaining deep blocking of visible and shorter NIR wavelengths below 880nm. Engineered with precision hard coatings, this filter ensures superior durability, stability, and optical performance. ### Technical Specifications | Cut-on Wavelength (CWL) | 910 nm | | | Transmission Range | 910 – 1100 nm @ T>90% | | | Blocking Range | 350 – 880 nm @ T --- ## ​LP635nm Longpass Filter | 2.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/170.html **Summary**: The OPTOStokes LP635nm longpass filter offers >90% transmission above 640nm and deep blocking below 620nm, ideal for red and near-infrared imaging applications. > **Detail Content:** ### LP635nm Longpass Filter | 2.0mm Thickness The OPTOStokes LP635nm Longpass Filter is designed to transmit red and near-infrared wavelengths with exceptional clarity and stability. It offers high transmission above 640nm while effectively blocking unwanted shorter wavelengths below 620nm, making it ideal for fluorescence emission detection, machine vision, and spectroscopy applications. ### Technical Specifications | Cut-on Wavelength (CWL) | 635 nm | | | Transmission Range | 640 – 1100 nm @ T>90% | | | Blocking Range | 350 – 620 nm @ T --- ## ​BP680nm Bandpass Filter | FWHM 25nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/169.html **Summary**: The OPTOStokes BP680nm bandpass filter offers 25nm FWHM and 90% transmission for fluorescence and imaging systems. Contact sales@optofilters.com for details. > **Detail Content:** ### BP680nm Bandpass Filter | FWHM 25nm, 1.0mm Thickness The OPTOStokes BP680nm Bandpass Filter provides precise wavelength control and superior transmission for advanced imaging and fluorescence detection systems. With an average transmission above 90% between 675–685nm and excellent blocking performance (90% | | | Full Width at Half Maximum (FWHM) | 25 ± 3 nm | | | Transmission Range | 675 – 685 nm @ T>90% | | | Blocking Range | 350 – 1100 nm @ T --- ## BP650nm Bandpass Filter | FWHM 50nm, 1.1mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/168.html **Summary**: Discover the OPTOStokes BP650nm bandpass filter with 90% transmission and 50nm FWHM, ideal for fluorescence and imaging applications. Contact sales@optofilters.com . > **Detail Content:** ### BP650nm Bandpass Filter | FWHM 50nm, 1.1mm Thickness The OPTOStokes BP650nm Bandpass Filter delivers excellent spectral control and high transmission for optical systems operating in the red wavelength region. With over 90% transmission from 635–675nm and strong out-of-band blocking across 350–1100nm, this filter ensures clean signal isolation and superior color separation in fluorescence and machine vision applications. ### Technical Specifications | Center Wavelength (CWL) | 650 ± 3 nm | | | Full Width at Half Maximum (FWHM) | 50 ± 3 nm | | | Transmission Range | 635 – 675 nm @ T>90% | | | Blocking Range | 350 – 1100 nm @ T --- ## BP565nm Bandpass Filter | FWHM 22nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/167.html **Summary**: Explore the OPTOStokes BP565nm bandpass filter with 22nm FWHM and OD>6 blocking, ideal for PCR and fluorescence imaging. Contact sales@optofilters.com . > **Detail Content:** ### BP565nm Bandpass Filter | FWHM 22nm, 1.0mm Thickness The OPTOStokes BP565nm Bandpass Filter is designed for high-precision fluorescence and PCR detection systems that demand exceptional wavelength accuracy and deep optical blocking. With an average transmission above 90% between 560–570nm, this filter ensures reliable excitation and emission separation for sensitive optical measurements. ### Technical Specifications | Center Wavelength (CWL) | 565 ± 2 nm @ T>90% | | | Full Width at Half Maximum (FWHM) | 22 ± 2 nm | | | Transmission Range | 560 – 570 nm @ Tave > 90% | | | Blocking Range | 350–545 nm, 585–800 nm, 800–1050 nm | | | Optical Density | ODavg > 6 (OD > 5), OD > 3 outside blocking range | | | Surface Quality | 60/40 scratch-dig | | | Thickness | 1.0 mm | | ### Applications This filter is ideal for PCR fluorescence detection, biomedical imaging, fluorescence microscopy, and analytical spectroscopy. Its narrow 22nm bandwidth and OD>6 blocking ensure high contrast between signal and background, making it suitable for high-sensitivity detection of fluorophores around 565nm emission bands. ### Customization & Service OPTOStokes provides flexible customization for different system requirements. Filters can be produced in round, square, or irregular shapes, with optional mounting rings for integration convenience. Our precision coating process delivers consistent optical performance, and our in-stock availability ensures prompt delivery and quality assurance across each batch. ### Pain Points & Contact If you face challenges with long lead times, inconsistent blocking levels, or specialized wavelength requirements, OPTOStokes offers rapid technical response and tailored solutions. Contact our optical experts at sales@optofilters.com or visit www.optofilters.com to explore filters optimized for your PCR and fluorescence applications. --- ## BP550nm Bandpass Filter | FWHM 50nm, 1.0mm Thickness **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/166.html **Summary**: Discover the OPTOStokes BP550nm bandpass filter with 90% transmission and 50nm FWHM, ideal for fluorescence imaging and OEM integration. Contact sales@optofilters.com . > **Detail Content:** ### BP550nm Bandpass Filter | FWHM 50nm, 1.0mm Thickness ![Image: BP550-50nm-1.0mm.webp](https://www.optofilters.com/uploads/allimg/20251022/1-25102210252a51.webp) The OPTOStokes BP550nm Bandpass Filter delivers exceptional spectral precision and stability across the 540–570nm range. Engineered for demanding optical systems, this filter provides over 90% transmission within its passband and deep blocking (90% | | | Full Width at Half Maximum (FWHM) | 50 ± 3 nm | | | Transmission Range | 540 – 570 nm @ T>90% | | | Blocking Range | 350 – 1100 nm @ T --- ## BP530nm Bandpass Filter | 20nm FWHM, 1.0mm Thickness for PCR **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/165.html **Summary**: OPTOStokes BP530nm bandpass filter features >90% avg transmission at 525-535nm, 20nm FWHM, and OD>6 blocking for precision. Suited for PCR and imaging – in-stock or custom. Contact sales@optofilters.com for details and quotes. > **Detail Content:** ### BP530nm Bandpass Filter | 20nm FWHM, 1.0mm Thickness for PCR Designed for high-precision spectral filtering, the OPTOStokes BP530nm bandpass filter provides excellent transmission in the green range while delivering deep optical density blocking. This makes it an essential component for sensitive applications such as PCR, where accurate wavelength isolation is critical for reliable results. ### Technical Specifications | Parameter | Value | | | Center Wavelength (CWL) | 530 ± 2 nm | | | Full Width at Half Maximum (FWHM) | 20 ± 2 nm | | | Transmission Band | 525-535 nm @ Tave > 90% | | | Blocking Ranges | 350-510 nm @ ODave > 6 (OD > 5) 547-800 nm @ ODave > 6 (OD > 5) 800-1050 nm @ OD > 3 | | | Thickness | 1.0 mm | | | Surface Quality | 60/40 | | ### Applications Optimized for PCR systems, this filter isolates 530nm emissions to boost fluorescence detection in quantitative assays, improving diagnostic accuracy. It shines in fluorescence microscopy for green dye imaging, minimizing crosstalk in biological samples. Medical spectroscopy benefits from its precision in biomarker studies, while industrial sensors use it for selective green light analysis. Explore our Fluorescence Filters or dive into High-Quality Fluorescence Filters for more insights. ### Customization & Service OPTOStokes boasts a vast in-stock lineup for rapid prototyping, paired with robust customization services. We accommodate square, round, or bespoke shapes, including mounting rings for straightforward assembly. Count on our international-grade precision, stringent quality controls, and predictable delivery schedules to support your development needs. Check out www.optokens.com for full catalog access. ### Pain Points & CTA Engineers in R&D often grapple with off-the-shelf filters lacking sufficient blocking depth, causing signal noise in experiments. Procurement leads face unreliable vendors leading to quality inconsistencies and delays. Decision-makers require dependable optics that scale with project demands. OPTOStokes tackles these issues through expert engineering and dedicated assistance. Email sales@optofilters.com or use our online form for personalized consultations and prompt pricing. --- ## BP520nm Bandpass Filter | 20nm FWHM, 1.0mm Thickness for PCR **Type**: Products **URL**: https://www.optofilters.com/Narrow_Bandpass/164.html **Summary**: Explore OPTOStokes BP520nm bandpass filter: >90% transmission at 515-525nm, 20nm FWHM, and OD>6 blocking. Perfect for PCR and fluorescence apps. In-stock or customized – email sales@optofilters.com for expert quotes. > **Detail Content:** ### BP520nm Bandpass Filter | 20nm FWHM, 1.0mm Thickness for PCR Engineered for precision in optical systems, the OPTOStokes BP520nm bandpass filter offers superior spectral control in the green wavelength range. With high average transmission and exceptional blocking depth, it's tailored for demanding applications like PCR detection, ensuring clear signal isolation and minimal interference. ### Technical Specifications | Parameter | Value | | | Center Wavelength (CWL) | 520 ± 2 nm | | | Full Width at Half Maximum (FWHM) | 20 ± 2 nm | | | Transmission Band | 515-525 nm @ Tave > 90% | | | Blocking Ranges | 350-500 nm @ ODave > 6 (OD > 5) 540-800 nm @ ODave > 6 (OD > 5) 800-1050 nm @ OD > 3 | | | Thickness | 1.0 mm | | ### Applications This narrowband filter is ideal for PCR instruments, where it isolates the 520nm emission for accurate fluorescence detection in real-time quantitative assays. It also supports fluorescence microscopy by enhancing green fluorophore signals, reducing background noise in cell imaging. In medical diagnostics, it aids spectroscopy setups for biomarker analysis. For broader uses, consider environmental sensors or laser systems requiring precise green light filtering. Learn more about our Fluorescence Filters. ### Customization & Service OPTOStokes provides an extensive in-stock inventory for immediate selection, complemented by advanced customization capabilities. We can fabricate in square, round, or custom shapes, with optional mounting rings for easy integration. Rely on our world-class precision, consistent quality assurance, and dependable lead times to meet your project timelines. Visit www.optofilters.com to browse options. ### Pain Points & CTA R&D engineers frequently encounter sourcing delays for narrowband filters or limitations in achieving high OD blocking, hindering experiment accuracy. Purchasing managers deal with variable supplier quality, potentially compromising device performance. Technical decision-makers seek partners who deliver spectral precision without extended waits. OPTOStokes resolves these with expert optics and responsive support. Contact sales@optofilters.com or inquire via our website for customized quotes and technical guidance. --- ## BP460nm Bandpass Filter FWHM 60nm ±3nm Thickness 1.1mm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/163.html **Summary**: OPTOStokes BP460nm bandpass filter offers 90% transmission at 430–480nm with precise 60nm FWHM. Ideal for fluorescence, imaging, and diagnostic systems. Contact sales@optofilters.com . > **Detail Content:** ### Technical Specifications | Parameter | Specification | | | Center Wavelength (CWL) | 460 ±3 nm | | | Full Width at Half Maximum (FWHM) | 60 ±3 nm | | | Transmission Range | 430–480 nm @ T > 90% | | | Blocking Range | 350–1100 nm @ T < 1% | | | Thickness | 1.1 mm | | | Part No. | 20210526 | | ### Core Advantages The OPTOStokes BP460nm bandpass filter combines high transmission with deep out-of-band blocking, ensuring clean signal isolation in blue-light regions. Each filter is fabricated using advanced ion-assisted deposition for stable spectral performance and superior environmental durability. Its narrow 60nm bandwidth and >90% peak transmission provide excellent color separation and consistent performance across optical systems requiring precise wavelength control. ### Applications The BP460nm filter is widely used in: Fluorescence imaging and microscopy Medical diagnostic instruments and life-science detection Machine vision and color inspection systems Optical sensing and spectroscopic measurement ### Customization & Service OPTOStokes offers flexible customization for diameter, shape (round, square, or irregular), and mounting options. A large inventory of standard filters is available for immediate shipment, while custom coatings and assemblies can be tailored to meet specific optical designs. All products are tested to international quality standards to ensure reliable performance and repeatable results, supported by controlled lead times and technical assistance. ### Pain Points & Call to Action Engineers and procurement teams often face challenges such as unpredictable delivery schedules, unstable coating performance, and limited customization support. OPTOStokes resolves these issues with ready-to-ship stock, rapid prototyping capability, and expert optical consultation. For technical support or custom inquiries, please contact sales@optofilters.com or visit www.optokens.com. --- ## ND80% Neutral Density Filter: Precise 80% Light Attenuation (400-1100 nm) **Type**: Products **URL**: https://www.optofilters.com/NeutralDensityFilter/158.html **Summary**: OPTOStokes ND80% Neutral Density Filter provides precise 80% (±2%) transmission across the 400-1100nm spectrum. Ideal for laser testing and industrial vision systems requiring stable light input. > **Detail Content:** ### ND80% Neutral Density Filter: Precise 80% Light Attenuation (400-1100 nm) The OPTOStokes **ND80% Neutral Density Filter** is a high-precision component designed to attenuate light by exactly 20%, allowing **80% transmission** across a critical **wide spectral band**. Its primary function is to reduce the intensity of incident light without altering its spectral color balance or image fidelity, making it essential for accurate measurements and consistent industrial imaging. ### Critical Technical Specifications This neutral density filters is engineered for exceptional neutrality and stability across the VIS-NIR spectrum. | Parameter | Specification | | | Nominal Transmission (T) | 80% T (Optical Density OD 0.1) | | | Spectral Range | 400 nm - 1100 nm (Wideband VIS-NIR) | | | Transmission Tolerance | ±2% (T) across the range | | | Substrate Thickness | 1.1 mm (Thin Substrate) | | | Surface Quality (S/D) | 60/40 scratch-dig | | | Part Number | 0800355 | | ### Precision Control of Light Intensity The **ND80% Filter** (Part #0800355) offers highly controlled, uniform light attenuation, a key feature for professional applications: Spectral Neutrality: Provides flat transmission across the **400 nm to 1100 nm** range, ensuring **zero color shift** or spectral bias in the light source, vital for accurate color reproduction or spectral analysis. High Precision Tolerance: The tight **±2% transmission tolerance** ensures that the light intensity adjustment is predictable and consistent across all units and wavelengths, critical for repeatable calibration. Compact Design: The **1.1 mm thin substrate** balances high durability with a minimal footprint, simplifying integration into compact camera systems, filter wheels, or multi-element optical assemblies. ### Core Applications This filter is broadly used wherever precise, spectrally neutral light reduction is required: Laser Systems and Testing: Safely **reduces high beam intensity** to levels compatible with sensitive sensors, detectors, or test equipment in the VIS-NIR range for calibration and component testing. Industrial and Machine Vision Filters: Stabilizes light input for Quality Assurance (QA) systems on bright production lines, ensuring consistent image exposure and reliable quality checks regardless of light fluctuations. Scientific Imaging: Used in microscopy and spectroscopy to adjust light intensity for optimal detector performance without changing illumination quality. ### OPTOStokes Stock and Custom ND Solutions OPTOStokes stocks the **ND80% filter** (Part #0800355) in standard sizes for immediate shipment. We are committed to predictable quality and quick delivery to meet your urgent production needs. For unique integration challenges, we offer **custom solutions** for this light attenuation filter: custom shapes (circular, square, irregular cuts), alternative optical densities (e.g., ND50% or ND20%), and optional mounting solutions. Our precision manufacturing ensures that the tight **±2% attenuation tolerance** is maintained across all custom sizes. Need precise light intensity adjustment or a custom ND solution? Contact our optical experts to secure the right filter for your system or discuss your unique specifications. Email: sales@optofilters.com | Visit: www.optokens.com --- ## LP800nm Longpass Filter 2.0mm **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/157.html **Summary**: LP800nm longpass filter: 825-1100nm T>90%, blocks 350-780nm. 2.0mm thick. Ideal for IR imaging, lasers. Stock from OPTOStokes. > **Detail Content:** ### LP800nm Longpass Filter ![Image: LP800-1.0mm.webp](https://www.optofilters.com/uploads/allimg/20250930/1-250930110143P7.webp) Specifications: Transmission: 825-1100nm @ T>90% Blocking: 350-780nm @ T90% clarity while blocking visible to ultraviolet wavelengths (350-780nm) to --- ## ND45% Neutral Density Filter **Type**: Products **URL**: https://www.optofilters.com/NeutralDensityFilter/156.html **Summary**: ND45% filter: 400-1100nm T=45%±2%, 1.1mm. Ideal for exposure control, laser systems. > **Detail Content:** ### ND45% Neutral Density Filter ![Image: ND45% Neutral Density Filter](https://www.optofilters.com/uploads/allimg/20250930/1-250930110320237.webp) Specifications: Transmission: 400-1100nm @ T=45%±2% Thickness: 1.1mm Surface Quality: 60/40 Part Number: 0800245 The ND45% neutral density filter provides uniform 45% light transmission across 400-1100nm, with tight ±2% tolerance. Its 1.1mm thickness and 60/40 surface quality ensure stable performance in precision optical systems requiring controlled light attenuation without spectral distortion. ### Applications Photography & videography: Balances exposure in high-brightness scenes (e.g., outdoor shoots) without altering color balance. Laser systems: Reduces beam intensity to protect detectors or calibrate power levels in 400-1100nm range. Spectroscopy: Stabilizes light input to prevent sensor saturation during broad-wavelength material analysis. ### Custom Options Available in custom shapes: circular, square, or irregular cuts. Optional lens mounts for seamless integration into your optical setup. OPTOStokes stocks this ND45% filter (part 0800245) for immediate shipment. Need tailored specs? Our precision manufacturing ensures consistent 45% transmission across custom wavelengths or sizes, with controlled lead times. Need reliable light intensity control? Email sales@optofilters.com or message us with your system details—we’ll help you secure the right filter. --- ## BP460 Bandpass Filter FWHM 55nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/155.html **Summary**: BP460 bandpass filter: 440-480nm T>90%, 55nm FWHM, OD>6 blocking. Dual-coated. Ideal for fluorescence. Stock from OPTOStokes. > **Detail Content:** ### BP460 Bandpass Filter 55nm ![Image: BP460-55nm-1.1mm.webp](https://www.optofilters.com/uploads/allimg/20250930/1-25093011055b44.webp) Specifications: Transmission Band: 440-480nm @ Tave>90% Center Wavelength (CWL): 460±2nm FWHM: 55±2nm Blocking Ranges: 200-420nm, 520-700nm, 700-1000nm @ ODave>6 (OD>5 min) Angle of Incidence: 0° Coating: Dual-sided The BP460 bandpass filter delivers sharp 55nm bandwidth performance, transmitting 440-480nm light with >90% average transmittance while providing deep blocking (OD>6) across out-of-band ranges. Its dual-sided coating ensures uniform performance, ideal for low-background optical systems. ### Applications Fluorescence microscopy: Optimized for 460nm fluorophores (e.g., Pacific Blue), isolating emission from excitation light. Flow cytometry: Filters 440-480nm signals to enhance detection of blue-fluorescently labeled cells. Machine vision: Improves contrast in blue-LED inspection systems (e.g., semiconductor wafer defect detection). ### Custom Options Available in custom shapes: circular, square, or irregular cuts. Optional lens mounts for seamless integration into 0°-oriented setups. OPTOStokes offers BP460 filters in stock, with consistent high OD blocking and transmission. Need tailored specs? Our precision manufacturing ensures custom sizes or tolerances, with controlled lead times. Need reliable blue wavelength isolation? Email sales@optofilters.com or message us with your system details—we’ll help you secure the right filter. --- ## LP470 Longpass Filter 1.0mm **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/154.html **Summary**: LP470 longpass filter: 475-1100nm T>90%, blocks 350-440nm. 1.0mm thick. Ideal for fluorescence, IR imaging. > **Detail Content:** ### LP470 Longpass Filter ![Image: LP470.webp](https://www.optofilters.com/uploads/allimg/20250930/1-250930113J9308.webp) Specifications: Transmission: 475-1100nm @ T>90% Blocking: 350-440nm @ T90% clarity while blocking ultraviolet to blue light (350-440nm) to --- ## DM495nm Dichroic Filter **Type**: Products **URL**: https://www.optofilters.com/DichroicMirror/153.html **Summary**: DM495nm dichroic filter: 500-740nm T>90%, blocks 350-475nm, 45° AOI. Ideal for fluorescence, beam splitting. Stock from OPTOStokes. > **Detail Content:** ### DM495nm Dichroic Filter Specifications: Transmission: 500-740nm @ T>90% Blocking: 350-475nm @ T90% efficiency while blocking 350-475nm to --- ## 670nm Shortpass Filter 0.55mm thin **Type**: Products **URL**: https://www.optofilters.com/Shortpass_Filter/152.html **Summary**: 670nm shortpass filter: 405-660nm T>90%, blocks 350-375nm & 750-1100nm. 0.55mm thin. Stock/part 0207676 from OPTOStokes. > **Detail Content:** ### 670nm Shortpass Filter Specifications: Transmission: 405-660nm @ T>90% Blocking: 350-375nm & 750-1100nm @ T90% clarity while blocking ultraviolet (350-375nm) and infrared (750-1100nm) to --- ## 450nm Bandpass Filter FWHM 30nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/151.html **Summary**: 450nm filter: 450-460nm T>90%, FWHM 30nm, 350-1100nm blocking. Ultra-thin (0.21mm). Stock/part 0207676 from OPTOStokes. > **Detail Content:** ### 450nm Bandpass Filter Specifications: Transmission: 450-460nm @ T>90% FWHM: 30±3nm Blocking: 350-1100nm @ T90% efficiency while blocking 350-1100nm to --- ## 1070nm Bandpass Filter FWHM 35nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/150.html **Summary**: 1070nm filter: 1060-1080nm T>90%, FWHM 35nm, 350-1100nm blocking. Ideal for lasers, spectroscopy. Stock/part 0207437 from OPTOStokes. > **Detail Content:** ### 1070nm Bandpass Filter Specifications: Transmission: 1060-1080nm @ T>90% Center Wavelength (CWL): 1070±4nm FWHM: 35±3nm Blocking: 350-1100nm @ T90%) across 1060-1080nm with a 35nm bandwidth, while blocking stray light from 350-1100nm to --- ## ND10% Neutral Density Filter **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/149.html **Summary**: ND10% filter: 350-1100nm T=10%, 2.0mm. Ideal for exposure control, laser systems. Stock/part 0800626 from OPTOStokes. > **Detail Content:** ### ND10% Neutral Density Filter Specifications: Transmission: 350-1100nm @ T=10% (±1%) Thickness: 2.0mm Surface Quality: 60/40 Reference Part Number: 0800626 The ND10% neutral density filter provides uniform 10% light transmission across 350-1100nm, ideal for precise light intensity reduction without altering spectral distribution. Its 2.0mm thickness and 60/40 surface quality ensure stability in demanding optical systems. ### Applications Photography & imaging: Controls exposure in high-brightness scenes (e.g., outdoor shoots) without changing aperture/shutter settings. Laser systems: Reduces laser intensity to protect detectors or calibrate power levels in 350-1100nm range. Spectroscopy: Balances light input to prevent sensor saturation during broad-wavelength analysis. ### Custom Options Available in custom shapes: circular, square, or irregular cuts. Optional lens mounts for seamless integration into your optical setup. OPTOStokes stocks this ND10% filter (part 0800626) for immediate shipment. Need tailored specs? Our precision manufacturing ensures consistent 10% transmission across custom wavelengths or sizes, with controlled lead times. Need reliable light attenuation? Email sales@optofilters.com or message us with your system details—we’ll help you secure the right filter. --- ## 475nm Bandpass Filter 25nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/148.html **Summary**: 475nm bandpass filter (25nm): 465-485nm T>90%, 350-1100nm T<0.1%. Ideal for fluorescence, flow cytometry. Stock/part 19779 from OPTOStokes. > **Detail Content:** ### 475nm Bandpass Filter 25nm Specifications: Transmission: 465-485nm @ T>90% Center Wavelength (CWL): 475±3nm Bandwidth (FWHM): 25nm Blocking: 350-1100nm @ T90% efficiency while blocking 350-1100nm to --- ## 675nm Bandpass Filter FWHM 90nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/147.html **Summary**: 675nm bandpass filter: 640-710nm T>90%, FWHM 90nm, 350-1100nm blocking. Ideal for fluorescence, spectroscopy. Stock/custom from OPTOStokes. > **Detail Content:** ### 675nm Bandpass Filter Specifications: Transmission: 640-710nm @ T>90% FWHM: 90±3nm Blocking: 350-1100nm @ T90%) across 640-710nm with a 90nm bandwidth, while blocking stray light from 350-1100nm to --- ## 560nm Longpass Filter 1.0mm **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/146.html **Summary**: 560nm longpass filter: 600-1100nm T>90%, 350-550nm T<1%. Ideal for IR imaging, spectroscopy. Stock/custom from OPTOStokes. > **Detail Content:** ### 560nm Longpass Filter ![Image: LP560.webp](https://www.optofilters.com/uploads/allimg/20250930/1-250930114A4L3.webp) Specifications: Transmission: 600-1100nm @ T>90% Blocking: 350-550nm @ T --- ## 550nm Longpass Filter **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/145.html **Summary**: 550nm longpass filter: 600-1100nm T>90%, 350-550nm T<1%. Ideal for IR imaging, spectroscopy. Stock/custom from OPTOStokes. > **Detail Content:** ### 550nm Longpass Filter Specifications: Transmission: 600-1100nm @ T>90% Blocking: 350-550nm @ T90% clarity while blocking ultraviolet to green wavelengths (350-550nm) to --- ## SP700nm Shortpass Dichroic Mirror: Visible/NIR Beam Separator (45° AOI) **Type**: Products **URL**: https://www.optofilters.com/Shortpass_Filter/144.html **Summary**: OPTOStokes SP700nm Shortpass Dichroic Mirror transmits 400-750nm ($>90\%$) and deeply blocks 800-975nm ($<1\%$) at 45° AOI. Essential for visible signal separation from NIR lasers. > **Detail Content:** ### SP700nm Shortpass Dichroic Mirror: Visible/NIR Beam Separator (45° AOI) The OPTOStokes **SP700nm Dichroic Mirror** is a high-performance **Shortpass Filter** engineered to deliver optimal spectral separation at the 45° Angle of Incidence (AOI). Its design is centered on efficiently **transmitting visible and near-red light** while providing **deep rejection of Near-Infrared (NIR) wavelengths**. This makes the SP700nm an indispensable component in complex optical systems that require managing both visible signals and high-power NIR lasers. ### Critical Technical Specifications Built on a precision 1.45 mm substrate, the SP700nm ensures low wavefront distortion and is perfectly suited for high-end imaging and OEM integration. | Parameter | Specification | | | Filter Type | Shortpass Dichroic | | | Transmission Passband (T) | > 90% T from 400 nm to 750 nm | | | Blocking Stopband (R) | < 1% T (or > 99% R) from 800 nm to 975 nm | | | Angle of Incidence (AOI) | 45° (Degrees) | | | Substrate Thickness | 1.45 mm | | | Surface Quality (S/D) | 60/40 scratch-dig | | ### High-Efficiency Visible/NIR Separation The **SP700nm Shortpass Mirror** is meticulously designed to isolate visible signals from NIR interference: High Visible Throughput: Allows the full visible spectrum up to 750 nm to pass with **greater than 90% efficiency**, ensuring maximum signal fidelity for fluorescence emission or visible imaging. Deep NIR Rejection: Provides **deep blocking** (T < 1%) for critical NIR laser lines, such as 808 nm, 850 nm, or 980 nm, effectively reflecting them. This is vital for reducing background noise and protecting detectors. Optimized for 45° AOI: The coating performance is specifically tuned for a 45° angle, ideal for efficient beam combining (reflecting NIR laser) or beam splitting (separating visible signal from NIR light). ### Core Applications This dichroic optical filter excels in advanced multi-spectral environments: Fluorescence Microscopy: Acts as the primary emission filter, transmitting the shorter-wavelength fluorescence signal (400-750 nm) while reflecting or blocking longer-wavelength excitation lasers (800-975 nm). Laser Systems & Beam Combination: Used to combine a visible imaging path with an **NIR laser source** (e.g., $808\text{nm}$ for targeting), ensuring high efficiency for both channels without cross-talk. Machine Vision & Spectroscopy: Splits visible scene light from dedicated NIR illumination or analysis channels for sophisticated multi-spectral data acquisition. ### OPTOStokes Quality and Custom Options OPTOStokes stocks **SP700nm Shortpass Mirrors** for rapid deployment in your system. We guarantee consistent 60/40 surface quality and reliable spectral performance. For unique integration requirements, our custom options include: custom sizing (circular, square, or irregular shapes), alternative thickness, and optional lens mounts for easy integration. If you need a slightly different cut-off wavelength or AOI, our **precision manufacturing** ensures we can deliver tailored specifications with controlled lead times. Having issues with beam separation or filter fit? Email sales@optofilters.com or message us with your system details—our optical engineering team will help you find the right solution. --- ## BP660nm Bandpass Filter FWHM: 25±3nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/143.html **Summary**: BP660nm bandpass filter: 660nm CWL, 25nm FWHM, 350-1100nm blocking. Ideal for fluorescence, spectroscopy. Stock & custom from OPTOStokes. > **Detail Content:** ### BP600nm Bandpass Filter Key Specifications: Transmission: 655-665nm @ T>90% FWHM: 25±3nm CWL: 660±3nm Blocking: 350-1100nm @ T90% transmission at 655-665nm, paired with deep blocking (T --- ## 40% Neutral Density Filter **Type**: Products **URL**: https://www.optofilters.com/NeutralDensityFilter/137.html **Summary**: OPTOStokes 40% neutral density filter: 350-1100nm T=40%±5%, 1.0mm thickness. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 40% Neutral Density Filter | OPTOStokes ![Image: 40% Neutral Density Filter](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200215517.webp) ### Technical Specifications | Parameter | Description | | | Transmission | 350-1100nm @ T=40%±5% | | | Thickness | 1.0mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Filter Our 40% neutral density filter provides controlled light attenuation across 350-1100nm, reducing intensity by 60% while maintaining spectral neutrality. With 40%±5% transmission, it preserves color integrity—ideal for applications needing balanced light reduction without distortion. ### Key Advantages Uniform 40%±5% transmission across 350-1100nm for consistent light control Spectrally neutral design maintains color accuracy in imaging and measurement 1.0mm thickness balances durability with system integration flexibility 60/40 surface quality minimizes scattering, ensuring clean beam profiles ### Applications Imaging Systems: Reduces harsh light in high-brightness environments (e.g., outdoor photography) while retaining natural color Laser Testing: Moderates 350-1100nm laser intensity for component validation without altering beam characteristics Spectroscopy: Optimizes light levels to match detector sensitivity, enhancing signal-to-noise ratios in analysis ### Stock & Custom Options 1.0mm thickness and standard sizes are in stock for immediate delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional lens mounts for seamless system integration. ### Why OPTOStokes? Our filters meet international optical standards, with ready inventory for urgent needs. Custom specifications? Our team delivers precise, on-time results. Trusted quality for 40% attenuation applications. ### Contact Us Need reliable 40% light reduction? Email sales@optofilters.com or message us—we’ll find your perfect fit. --- ## 70% Neutral Density Filter **Type**: Products **URL**: https://www.optofilters.com/NeutralDensityFilter/136.html **Summary**: OPTOStokes 70% neutral density filter: 350-1100nm T=70%±3%, 1.1mm thickness. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 70% Neutral Density Filter | OPTOStokes ![Image: 70% Neutral Density Filter](https://www.optofilters.com/uploads/allimg/20250723/1-250H320024AE.webp) ### Technical Specifications | Parameter | Description | | | Transmission | 350-1100nm @ T=70%±3% | | | Thickness | 1.1mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Filter Our 70% neutral density filter provides precise light attenuation across 350-1100nm, reducing intensity by 30% while maintaining spectral neutrality. With 70%±3% transmission, it preserves color balance—critical for applications needing controlled light reduction without distortion. ### Key Advantages Uniform 70%±3% transmission across 350-1100nm for consistent light control Spectrally neutral design preserves color integrity in imaging and measurement 1.1mm thickness balances durability with system integration flexibility 60/40 surface quality minimizes scattering, ensuring clean beam profiles ### Applications Imaging Systems: Reduces harsh light in high-brightness scenes (e.g., outdoor photography) while retaining natural color Laser Testing: Moderates 350-1100nm laser intensity for component testing without altering beam characteristics Spectroscopy: Fine-tunes light levels to match detector sensitivity, improving signal-to-noise ratios in analysis ### Stock & Custom Options 1.1mm thickness and standard sizes are in stock for immediate delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional lens mounts for seamless system integration. ### Why OPTOStokes? Our filters deliver consistent 70% attenuation across 350-1100nm, meeting international standards. With ready inventory and custom capabilities, we ensure precise fit for your system. Reliable performance, every time. ### Contact Us Need controlled 70% light reduction? Email sales@optofilters.com or message us—we’ll help you find the perfect solution. --- ## 20% Neutral Density Filter **Type**: Products **URL**: https://www.optofilters.com/NeutralDensityFilter/135.html **Summary**: OPTOStokes 20% neutral density filter: 350-1100nm T=20%±3%, 1.1mm thickness. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 20% Neutral Density Filter | OPTOStokes ![Image: ND20%](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200316496.webp) ### Technical Specifications | Parameter | Description | | | Transmission | 350-1100nm @ T=20%±3% | | | Thickness | 1.1mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Filter Our 20% neutral density filter provides uniform light attenuation across 350-1100nm, reducing intensity by 80% while maintaining spectral neutrality. With precise 20%±3% transmission, it’s ideal for applications requiring consistent light reduction without color distortion. ### Key Advantages Uniform attenuation (20%±3%) across 350-1100nm for consistent results Spectrally neutral—preserves color balance in imaging and measurement 60/40 surface quality minimizes scattering, maintaining beam integrity 1.1mm thickness with other options available from stock ### Applications Laser Systems: Reduces 350-1100nm laser intensity to protect detectors and optics from overload Photography/Imaging: Controls exposure in high-brightness scenarios without altering color rendition Spectroscopy: Adjusts light intensity to match detector dynamic range, improving measurement accuracy ### Stock & Custom Options 1.1mm thickness and standard sizes are in stock for immediate delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional lens mounts for seamless system integration. ### Why OPTOStokes? Our neutral density filters meet international standards, with ready inventory for urgent needs. Custom attenuation levels or sizes? Our team delivers precise, on-time results. Trusted quality for light control applications. ### Contact Us Need reliable 20% light attenuation? Email sales@optofilters.com or message us—we’ll find your perfect fit. --- ## 275nm Bandpass Filter **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/134.html **Summary**: OPTOStokes 275nm bandpass filter: 270-285nm T>28%, 400-1100nm T<1%. 275±3nm CWL. Customizable. Contact sales@optofilters.com > **Detail Content:** ### 275nm Bandpass Filter | OPTOStokes ![Image: BP275nm.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200501T4.webp) ### Technical Specifications | Parameter | Description | | | Transmission Range | 270-285nm @ T>28% | | | Center Wavelength (CWL) | 275nm±3nm @ T>28% | | | Blocking Range | 400-1100nm @ T28% while blocking 400-1100nm to28%) in 270-285nm UV range Effective blocking (400-1100nm @ T --- ## 630nm Bandpass Filter FWHM10±2nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/133.html **Summary**: OPTOStokes 630nm bandpass filter: 628-632nm T>90%, 350-1100nm T<0.1%. 1.1mm, customizable. Contact sales@optofilters.com > **Detail Content:** ### 630nm Bandpass Filter | OPTOStokes ![Image: 630nm Bandpass Filter](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200540T2.webp) ### Technical Specifications | Parameter | Description | | | Center Wavelength (CWL) | 630±2nm @ T>>90% | | | Transmission Range | 628-632nm @ T>90% | | | FWHM | 10±2nm | | | Blocking Range | 350-1100nm @ T90% of light in the 628-632nm range (CWL 630±2nm) while blocking 350-1100nm to90%) at 628-632nm for strong signal throughput Broad blocking (350-1100nm @ T --- ## 780nm Notch Filter: Deep Laser Blocking for Spectroscopy & Imaging | OPTOStokes **Type**: Products **URL**: https://www.optofilters.com/NeutralDensityFilter/132.html **Summary**: OPTOStokes provides premium 780nm Notch Filters with OD $\ge 6$ deep blocking (675-815nm) and high transmission. Ideal for Raman spectroscopy and laser signal cleanup. In-stock and custom available. > **Detail Content:** ### 780nm Notch Filter: Deep Laser Blocking for Spectroscopy & Imaging | OPTOStokes The OPTOStokes 780nm Notch Filter is engineered to deliver superior spectral performance, providing **ultra-deep blocking** of laser lines while maintaining high transmission efficiency in adjacent spectral bands. This filter is an essential component for system integrators and researchers requiring precision control over 780 nm interference in sensitive optical platforms like Raman spectroscopy, fluorescence detection, and laser-based imaging. ### Technical Specifications | Parameter | Specification | | | Center Wavelength ($\lambda$0) | 780 nm | | | High OD Filter Blocking Level | OD ≥ 6 (Typical) | | | Stopband Width (Block Width) | 160 nm (e.g., 675 nm - 835 nm) | | | High Transmission Ranges | 425 nm - 625 nm (T > 90%); 825 nm - 900 nm (T > 90%) | | | Thickness | 0.3 mm (Available in 0.5 mm, 1.0 mm, and custom thickness) | | | Surface Quality (S/D) | 60/40 scratch-dig (Tighter specifications available upon request) | | ### Engineered for Precision Laser Signal Clean-up This notch optical filter is designed to create a very narrow, deep notch at the 780 nm region, effectively eliminating interference caused by 780 nm laser sources or strong ambient background light. The OD ≥ 6 blocking capability translates to less than 0.0001% light transmission across the stopband, ensuring that unwanted laser energy is attenuated near-completely, protecting sensitive detectors from saturation or damage. The fast transition from the blocking band to the high-transmission sidebands ensures maximum collection of critical signal light, which is preserved at T > 90% in both the visible (425 nm - 625 nm) and near-infrared (825 nm - 900 nm) regions. ### Key Advantages for System Integration Ultra-Deep Laser Blocking Filter: Guaranteed OD ≥ 6 rejection across the 780 nm band for near-perfect signal-to-noise ratio. High Signal Throughput: Exceptional transmission (> 90%) in adjacent regions preserves the maximum available signal from your sample or source. Slim Profile Design: The standard 0.3 mm thickness is ideal for space-constrained optical setups, micro-systems, and integration into existing filter cubes. Quality Coating Technology: 60/40 surface quality minimizes scattered light, maintaining the high spatial and spectral integrity required by advanced imaging systems. ### Core Applications Raman Spectroscopy: Crucial for blocking the 780 nm excitation laser line while efficiently collecting the resulting Stokes and Anti-Stokes shift signals. Biomedical Imaging & Microscopy: Removes 780 nm pump or background interference from fluorescence signals, particularly in multi-band systems that utilize 780 nm for auxiliary purposes. Custom Laser Systems: Used in OEM integration where high isolation of specific diode laser wavelengths is required for system stability and detector protection. ### Stock Availability & Custom Optical Filter Options The 0.3 mm thickness and standard sizes of our **780nm Notch Filters** are kept in ready inventory to meet your urgent prototyping and production needs, ensuring precision manufacturing and quick turnaround. For unique integration requirements, OPTOStokes specializes in high-level custom coatings and form factors. We support custom dimensions (circular, square, rectangular, and irregular shapes) and can provide optional lens mounts or laser marking for seamless system integration and easy identification. ### Why Partner with OPTOStokes? OPTOStokes provides high-quality optical solutions built on decades of experience in demanding markets. We guarantee product quality, predictable lead times, and expert technical support for every project—from stock orders to complex OEM partnerships. Trust us for reliable 780 nm interference control. Ready to specify your project or need technical confirmation? Contact our technical sales team for immediate stock quotes, detailed spectral data, or to start your custom design project: Email: sales@optofilters.com | Website: www.optokens.com --- ## 30/70 Beam Splitter **Type**: Products **URL**: https://www.optofilters.com/OpticalFilters/131.html **Summary**: OPTOStokes 30/70 beam splitter: 400-700nm T:R=30:70, 1.1mm thickness. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 30/70 Beam Splitter | OPTOStokes ### Technical Specifications | Parameter | Description | | | Split Ratio | Transmission:Reflection = 30:70 @ 400-700nm | | | Thickness | 1.1mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Splitter Our 30/70 beam splitter precisely divides 400-700nm light into 30% transmitted and 70% reflected beams. This controlled ratio makes it ideal for applications needing uneven light distribution—preserving more energy in one path while maintaining signal integrity in the other. ### Key Advantages Stable 30:70 split ratio across 400-700nm for consistent performance 60/40 surface quality minimizes scattering, ensuring clean beam profiles Durable coating withstands repeated handling in lab and industrial environments 1.1mm standard thickness with other options available from stock ### Applications Imaging Systems: Directs 70% light to main camera while sending 30% to monitoring sensors Laser Processing: Allocates 70% laser power to material processing, with 30% for alignment/measurement Spectroscopy: Diverts 30% sample light to detector while retaining 70% for auxiliary analysis ### Stock & Custom Options 1.1mm thickness and standard sizes are in stock for immediate delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional lens mount integration for seamless system fit. ### Why OPTOStokes? Our splitters meet international optical standards, with ready inventory for urgent needs. Custom ratios or sizes? Our team delivers precise, on-time results. Trusted quality for balanced light management. ### Contact Us Need reliable 30/70 beam splitting? Email sales@optofilters.com or message us—we’ll find your perfect solution. --- ## 50/50 Beam Splitter **Type**: Products **URL**: https://www.optofilters.com/OpticalFilters/130.html **Summary**: OPTOStokes 50/50 beam splitter: 400-700nm T:R=50:50, 1.0mm thickness. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 50/50 Beam Splitter | OPTOStokes ### Technical Specifications | Parameter | Description | | | Split Ratio | T:R=50:50 @ 400-700nm | | | Thickness | 1.0mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Splitter Our 50/50 beam splitter precisely divides 400-700nm light into equal transmitted and reflected beams (50% each). This balanced performance ensures consistent light distribution—critical for applications requiring simultaneous beam utilization without intensity loss. ### Key Advantages Stable 50:50 split ratio across 400-700nm for reliable results 60/40 surface quality minimizes scattering, preserving beam integrity Durable coating withstands repeated handling in lab and industrial setups Available in 1.0mm thickness with other options in stock ### Applications Imaging Systems: Splits light between cameras/sensors for simultaneous viewing and analysis Interferometry: Creates identical beam paths for precise optical interference measurements Laser Experiments: Divides laser beams for parallel processing in research and manufacturing ### Stock & Custom Options 1.0mm thickness and standard sizes are available for immediate delivery. Need specific dimensions? We offer custom fabrication in circular, square, or irregular shapes—with optional mounting hardware for seamless system integration. ### Why OPTOStokes? Our beam splitters meet international optical standards, with ready inventory for urgent needs. Custom solutions? Our team delivers precise, on-time results. Trusted quality for balanced light division. ### Contact Us Need reliable 50/50 beam splitting? Email sales@optofilters.com or message us—we’ll find your perfect fit. --- ## 700nm Dichroic Mirror **Type**: Products **URL**: https://www.optofilters.com/DichroicMirror/129.html **Summary**: Fluorescence Microscopy: Separates 350-675nm excitation light from 725-875nm emission signals, enhancing image contrast Laser Systems: Combines/splits visible (350-675nm) and near-IR (725-875nm) laser beams with minimal loss Spectroscopy: Isolates 725-875nm target wavelengths from 350-675nm background interference > **Detail Content:** ### 700nm Dichroic Mirror | OPTOStokes ![Image: DM700nm.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H32010405b.webp) ### Technical Specifications | Parameter | Description | | | Blocking Range | 350-675nm @ T90% | | | Thickness | 1.0mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Mirror Our 700nm dichroic mirror delivers precise wavelength separation, blocking 350-675nm light  ### Key Advantages Ultra-strict blocking (90% T) in 725-875nm preserves near-IR signal strength 60/40 surface quality ensures minimal scattering, maintaining beam integrity Durable coating withstands angular alignment and environmental exposure ### Applications Fluorescence Microscopy: Separates 350-675nm excitation light from 725-875nm emission signals, enhancing image contrast Laser Systems: Combines/splits visible (350-675nm) and near-IR (725-875nm) laser beams with minimal loss Spectroscopy: Isolates 725-875nm target wavelengths from 350-675nm background interference ### Stock & Custom Options 1.0mm thickness and standard sizes are in stock for immediate delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional mounting hardware for seamless system integration. ### Why OPTOStokes? Our dichroic mirrors meet international optical standards, with ready inventory for urgent needs. Custom solutions? Our team delivers precise, on-time results. Trusted quality for wavelength separation applications. ### Contact Us Need reliable 700nm wavelength separation? Email sales@optofilters.com or message us—we’ll find your perfect fit. --- ## 635nm Bandpass Filter FWHM35±3nm **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/128.html **Summary**: OPTOStokes 635nm bandpass filter: 630-640nm T>85%, 350-1000nm Tave<0.1%. 1.0mm, customizable. Contact sales@optofilters.com > **Detail Content:** ### 635nm Bandpass Filter | OPTOStokes ![Image: 635nm Bandpass Filter](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200621a4.webp) ### Technical Specifications | Parameter | Description | | | Center Wavelength (CWL) | 635±3nm @ T>90% | | | Full Width Half Maximum (FWHM) | 35±3nm | | | Blocking Range | 350-1000nm @ Tave85% | | | Thickness | 1.0mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Filter Our 635nm bandpass filter delivers precise red wavelength isolation, ideal for applications requiring focused 635nm signal. It transmits 85%+ of light in 630-640nm while blocking 99.9% of 350-1000nm light—critical for minimizing background interference in red wavelength systems. ### Key Advantages Sharp 635nm center wavelength (±3nm) for consistent targeting 85%+ transmission in 630-640nm for strong signal throughput Ultra-strict blocking (Tave --- ## 590nm Bandpass Filter **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/127.html **Summary**: OPTOStokes 590nm bandpass filter: 575-600nm T>90%, 350-1100nm Tave<0.1%. 1.1mm, customizable. Contact sales@optofilters.com > **Detail Content:** ### 590nm Bandpass Filter | OPTOStokes ![Image: BP590.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200A3443.webp) ### Technical Specifications | Parameter | Description | | | Center Wavelength (CWL) | 590±3nm @ T>90% | | | Transmission Range | 575-600nm @ T>90% | | | Full Width Half Maximum (FWHM) | 32nm±3nm | | | Blocking Range | 350-1100nm @ Tave90% while blocking 350-1100nm to90%) for reliable signal capture Ultra-strict blocking (350-1100nm @ Tave --- ## 680nm Bandpass Filter **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/126.html **Summary**: OPTOStokes 680nm bandpass filter: CWL 680±2nm (T>90%), 350-1000nm block T<0.1%. 1.0mm, customizable. Contact sales@optofilters.com > **Detail Content:** ### 680nm Bandpass Filter | OPTOStokes ![Image: BP680.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200H09B.webp) ### Technical Specifications | Parameter | Description | | | Center Wavelength (CWL) | 680±2nm @ T>90% | | | Transmission | 680nm @ T>90% | | | Blocking Range | 350-1000nm @ T90% transmission at 680nm (±2nm) while blocking 350-1000nm light to90%) at 680nm for strong signal throughput Broad blocking (350-1000nm @ T --- ## 850nm Bandpass Filter **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/125.html **Summary**: OPTOStokes 850nm bandpass filter: CWL 850±2nm (T>90%), 350-1100nm block T<0.1%. 1.1mm, customizable. Contact sales@optofilters.com > **Detail Content:** ### 850nm Bandpass Filter | OPTOStokes ![Image: BP850.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200IG42.webp) ### Technical Specifications | Parameter | Description | | | Center Wavelength (CWL) | 850±2nm @ T>90% | | | Transmission | 850nm @ T>90% | | | Blocking Range | 350-1100nm @ T90% transmission at 850nm (±2nm) while blocking 350-1100nm light to90%) at 850nm for strong signal throughput Broad blocking (350-1100nm @ T --- ## 350nm Bandpass Filter **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/124.html **Summary**: OPTOStokes 350nm bandpass filter: 348-354nm Tave>85%, 200-1000nm block T<0.01%. 3.0mm, customizable. Contact sales@optofilters.com > **Detail Content:** ### 350nm Bandpass Filter | OPTOStokes ![Image: BP350.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200PV49.webp) ### Technical Specifications | Parameter | Description | | | Transmission Range | 348-354nm @ Tave>85% | | | Center Wavelength (CWL) | 350±2nm @ Tave>85% | | | Blocking Range | 200-1000nm @ T85%) in 348-354nm range Ultra-steep blocking ( --- ## AR Coated Glass 750-1100nm **Type**: Products **URL**: https://www.optofilters.com/OpticalFilters/123.html **Summary**: OPTOStokes AR coated glass 750-1100nm: Tave>97% transmittance, 1.0mm thickness (stocked). Anti-reflective, customizable. Contact sales@optofilters.com > **Detail Content:** ### ### Technical Specifications | Parameter | Description | | | Transmission Range | 750-1100nm @ Tave>97% | | | Thickness | 1.0mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Product Our AR coated glass 750-1100nm minimizes surface reflections in the near-infrared (NIR) range, delivering average transmittance >97%. This precision anti-reflective coating is critical for NIR systems where light loss from reflection can compromise signal integrity. ### Key Benefits High average transmittance (>97%) across 750-1100nm reduces NIR light loss Anti-reflective coating eliminates glare and ghosting in near-IR imaging 60/40 surface quality ensures minimal scattering, preserving signal clarity Durable coating withstands handling and environmental exposure ### Applications NIR Imaging: Boosts light throughput in thermal cameras and night-vision systems for clearer imagery Spectroscopy: Reduces reflection artifacts in 750-1100nm analysis, improving measurement accuracy Laser Systems: Enhances efficiency in NIR laser setups by minimizing beam loss at glass interfaces ### Stock & Custom Options We stock 1.0mm thickness and standard sizes for quick delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional mounting—for seamless system integration. ### Why OPTOStokes? Our AR coated glass meets international NIR standards, with ready inventory for urgent needs. Custom solutions? Our team delivers precise, on-time results. Trusted quality for near-IR setups. ### Contact Us Need high-performance NIR AR glass? Email sales@optofilters.com or message us—we’ll find your perfect fit. --- ## AR Coated Glass 400-700nm **Type**: Products **URL**: https://www.optofilters.com/OpticalFilters/122.html **Summary**: OPTOStokes AR coated glass 400-700nm: T>98% transmission, 1.0mm thickness (stocked). Anti-reflective, customizable. Contact sales@optofilters.com > **Detail Content:** ### AR Coated Glass 400-700nm | OPTOStokes ### Technical Specifications | Parameter | Description | | | Transmission Range | 400-700nm @ T>98% | | | Thickness | 1.0mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Product Our AR coated glass 400-700nm minimizes surface reflections, maximizing light transmission in the visible spectrum (400-700nm). The precision anti-reflective coating ensures >98% transmittance—critical for maintaining signal strength in optical systems where every photon counts. ### Key Benefits Ultra-high transmittance (>98%) across 400-700nm reduces light loss Anti-reflective coating eliminates glare and ghosting in imaging 60/40 surface quality ensures minimal scattering, preserving image clarity Durable coating withstands handling and environmental exposure ### Applications Imaging Lenses: Boosts light throughput in camera lenses, microscopes, and telescopes for brighter, sharper visuals Machine Vision: Reduces reflection artifacts in inspection systems, improving accuracy in quality control Display Systems: Enhances visibility by minimizing surface reflections on screens and optical windows ### Stock & Custom Options We keep 1.0mm thickness and standard sizes in stock for immediate delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional mounting—to fit your system perfectly. ### Why OPTOStokes? Our AR coated glass meets international optical standards, with ready inventory for quick turnaround. Custom solutions? Our team delivers precise, on-time results. Trusted quality for critical optical setups. ### Contact Us Need high-transmission AR glass? Email sales@optofilters.com or message us—we’ll help you select the right fit. --- ## 800nm Short Wave Pass Filter **Type**: Products **URL**: https://www.optofilters.com/Shortpass_Filter/121.html **Summary**: OPTOStokes 800nm short wave pass filter: 410-780nm T>90%, 825-1100nm Tave<0.1%. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 800nm Short Wave Pass Filter | OPTOStokes ![Image: SP800.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200912A2.webp) ### Technical Specifications | Parameter | Description | | | Transmission Range | 410-780nm @ T>90% | | | Block Range | 825-1100nm @ Tave90%) across 410-780nm maximizes visible/near-visible signal Ultra-low blocking (Tave --- ## 760nm Short Wave Pass Filter | OPTOStokes **Type**: Products **URL**: https://www.optofilters.com/Shortpass_Filter/120.html **Summary**: OPTOStokes 760nm short wave pass filter: 425-750nm T>90%, 780-1100nm Tave<0.1%. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 760nm Short Wave Pass Filter | OPTOStokes ![Image: SP760.webp](https://www.optofilters.com/uploads/allimg/20250723/1-250H3200931147.webp) ### Technical Specifications | Parameter | Description | | | Transmission Range | 425-750nm @ T>90% | | | Blocking Range | 780-1100nm @ Tave90% across 425-750nm ensures maximum throughput of desired short wavelengths. Ultra-Low Blocking: Average transmittance --- ## 550nm Long Wave Pass Filter - Precise Optical Filtering **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/119.html **Summary**: Our 550nm long wave pass filter, built with advanced multi-layer dielectric coating technology, is designed for applications requiring precise wavelength separation. It delivers over 90% transmittance in the 550-1100nm range while limiting transmittance to below 1% in 350-530nm, ensuring top-tier performance. > **Detail Content:** ![Image: 550nm Long Wave Pass Filter](https://www.optofilters.com/uploads/allimg/20250717/1-250GG54633T4.webp) ### Product Overview At OPTOStokes, we’re dedicated to providing high-quality optical filters for professionals in optics and photonics. Our 550nm long wave pass filter, built with advanced multi-layer dielectric coating technology, is designed for applications requiring precise wavelength separation. It delivers over 90% transmittance in the 550-1100nm range while limiting transmittance to below 1% in 350-530nm, ensuring top-tier performance. ### What is a Long Wave Pass Filter? A long wave pass filter is an optical component that allows light with wavelengths above a specified cutoff to pass through while blocking shorter wavelengths. This feature makes it indispensable in applications needing isolated spectral regions, such as scientific research, industrial inspection, and imaging systems. Our 550nm model features a sharp cutoff curve at 550nm, ensuring minimal spectral leakage. ### Key Features Precise Cutoff: Sharp transition at 550nm for accurate wavelength selection. High Transmittance: >90% transmittance across 550-1100nm maximizes desired spectral flux. Superior Blocking:550nm Raman scattering, improving signal quality. Suitable for absorption or emission spectral analysis. Machine Vision: Filters UV/blue light to boost contrast in industrial sorting, defect detection, or surface inspection—e.g., identifying specific colored products in food processing. Photography & Cinematography: Blocks blue/UV light to enhance warm tones, ideal for landscape photography or cinematic effects like highlighting sunsets or autumn colors. Optical Sensors: Reduces short-wavelength interference to improve signal-to-noise ratio, applicable in environmental monitoring or industrial automation. ### Technical Specifications | Parameter | Description | | | Cutoff Wavelength | 550nm | | | Blocking Range | 350-530nm @ T90% | | | Thickness | 1.0mm (standard); other thicknesses available | | | Surface Quality | 60/40 scratch-dig | | | Material | Optical glass with multi-layer dielectric coating | | | Dimensions | Customizable; standard sizes include 25mm diameter, 50mm x 50mm, etc. | | | Mounting Options | Unmounted or integrated into lens mounts | | ### Custom Options We understand the uniqueness of each optical system, so we offer comprehensive customization: Sizes & Shapes: Circular, square, rectangular, or irregular shapes to match your specifications. Thickness: Various options to suit different application scenarios. Coatings: Custom coating designs for specific wavelength ranges or performance needs. Mounting: Integration into standard or custom lens mounts for easy system integration. Our engineering team is ready to provide expert advice to ensure you get the optimal filter solution. ### Why Choose OPTOStokes? Quality Assurance: Each filter undergoes strict testing to ensure consistent performance meeting international standards. Extensive Stock: Large inventory of standard filters enables quick delivery for urgent needs. Custom Expertise: Advanced production lines and technical expertise allow us to manufacture filters to your exact specifications. Competitive Pricing: High-quality products at affordable prices maximize your investment value. Exceptional Service: Support from selection to after-sales ensures the best experience. ### Customer Challenges & Solutions Choosing the right filter is critical for system performance. We address common challenges: Inaccurate Wavelength Selection: Our sharp 550nm cutoff ensures precise wavelength separation. System Compatibility Issues: Multiple sizes, shapes, and mounts guarantee seamless integration. Long Lead Times: Large stock and efficient production enable fast delivery of standard and custom products. Unstable Performance: High-quality materials and advanced coating technology ensure long-term stability. ### Call to Action Ready to enhance your optical system with our 550nm long wave pass filter? Contact our sales team at sales@optofilters.com to discuss your needs or request a quote.  Visit our website to fill out the inquiry form for more details. Let OPTOStokes be your partner in achieving optical excellence! --- ## 505nm Long Wave Pass Filter | OPTOStokes **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/118.html **Summary**: OPTOStokes' 505nm long wave pass filter offers >90% T@510-1100nm, <1% T@350-500nm. Ideal for fluorescence microscopy, spectroscopy. Customizable. Contact sales@optofilters.com > **Detail Content:** ![Image: LP505nm](https://www.optofilters.com/uploads/allimg/20250717/1-250GG52QL93.webp) Technical Specifications: Blocking: 350-500nm @ T90% Thickness: 1.0mm (other thicknesses in stock) Surface Quality: 60/40 scratch-dig At OPTOStokes, we deliver high-performance optical filters for photonics professionals. Our 505nm long wave pass filter, crafted with advanced dielectric coating technology, precisely separates wavelengths by blocking shorter wavelengths while transmitting longer ones—essential for applications requiring accurate spectral isolation. A long wave pass filter permits light above a specified cutoff (505nm here) while blocking shorter wavelengths, making it indispensable in scientific research, industrial inspection, and imaging systems. Key Advantages: Sharp 505nm cutoff for precise wavelength selection High transmittance (>90%) across 510-1100nm maximizes signal throughput Superior blocking (510nm), improving signal-to-noise ratio. Machine Vision: Reduces blue/UV interference in industrial sorting, boosting defect detection accuracy. With extensive stock of standard sizes and thicknesses, OPTOStokes enables quick . We also offer custom fabrication—circular, square, or irregular shapes, plus lens mount integration—to match your system. Our production line ensures consistent quality meeting international standards, with reliable lead times. Tired of slow deliveries or ill-fitting filters? Need guaranteed performance for critical experiments? Contact sales@optofilters.com or submit a website inquiry. Let OPTOStokes provide your ideal filtering solution—off-the-shelf or tailored. --- ## 400nm Longpass Filter - High Transmission & UV Blocking **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/117.html **Summary**: OPTOStokes’ 400nm longpass filter delivers >90% transmission from 400-1100nm and <1% from 200-370nm for superior UV blocking. Ideal for multiple applications, customizable sizes. Contact us today! > **Detail Content:** ![Image: 400nm Longpass Filter](https://www.optofilters.com/uploads/allimg/20250717/1-250GG51SHY.webp) ### Product Overview Ultraviolet light can degrade image quality, interfere with measurements, or damage sensitive optical components. The 400nm longpass filter from OPTOStokes addresses these challenges by effectively blocking UV wavelengths while allowing visible and near-infrared light to pass with exceptional clarity. Key features of our 400nm longpass filter include: High Transmission: >90% transmission across 400-1100nm Superior UV Blocking: 90% in 400-1100nm; --- ## 650nm Shortpass Filter **Type**: Products **URL**: https://www.optofilters.com/Shortpass_Filter/116.html **Summary**: 650nm shortpass filter: 410-640nm T>90%, 350-375nm&700-1000nm block <1%. In-stock, customizable. OPTOStokes ensures quality. Contact us! > **Detail Content:** ![Image: 650nm Shortpass Filter](https://www.optofilters.com/uploads/allimg/20250716/1-250G6145209556.webp) ### 650nm Shortpass Filter The 650nm shortpass filter is crafted to deliver precise optical performance, making it an ideal choice for systems requiring accurate separation of shorter wavelengths. Its balanced design combines high transmission in the target range with strict blocking of unwanted wavelengths, addressing the core needs of professional applications. ### Key Performance This filter features a sharp 50% transmission cutoff (CWL) at 650nm±5nm, creating a clear boundary between transmitted and blocked wavelengths. It achieves over 90% transmission from 410nm to 640nm, ensuring efficient passage of visible short wavelengths—critical for maintaining strong signal integrity. Notably, it provides reliable blocking with less than 1% transmission in two key ranges: 350-375nm (to reduce ultraviolet interference) and 700-1000nm (to eliminate near-infrared noise). With a standard thickness of 1.0mm (other thicknesses available in stock) and a 60/40 surface finish, it minimizes light scattering, preserving optical clarity in high-precision setups. ### Application Cases Machine Vision Systems: In automated inspection lines, it enhances contrast by filtering out 700-1000nm infrared light, ensuring accurate detection of color-coded components or printed labels that rely on visible short wavelengths. Fluorescence Microscopy: When paired with fluorophores emitting in 410-640nm, it blocks stray infrared light from excitation sources, sharpening fluorescent signal visibility and reducing background noise. Spectral Analysis: For colorimetry or material testing focusing on visible short wavelengths, it eliminates ultraviolet (350-375nm) and infrared (700-1000nm) interference, delivering more precise spectral data. ### Customization & Availability Beyond our ready stock, we offer tailored solutions to fit your equipment: Flexible Sizing: Available in square, round, or irregular shapes, with custom dimensions to match your system’s housing requirements. Mounting Options: Can be pre-assembled into lens rings for seamless integration, reducing installation time and ensuring alignment accuracy. OPTOStokes maintains a large inventory of 650nm shortpass filters for immediate shipment. For custom orders, our production lines adhere to international quality standards, with controlled lead times and rigorous testing to guarantee consistent performance. ### Solving Your Challenges Struggling with filters that compromise signal quality due to poor transmission or leaky blocking? Our 650nm shortpass filter’s tight parameter control ensures clean wavelength separation—whether you need a standard size from stock or a custom design. Reach out at sales@optofilters.com or leave a message on our site to discuss your specific needs. Our team will respond promptly with expert guidance to help you find the right solution. --- ## 670nm Longpass Filter **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/115.html **Summary**: 670nm longpass filter: 680-1100nm T>90%, 350-650nm block <1%. In-stock, customizable. OPTOStokes ensures quality & on-time delivery. Contact us > **Detail Content:** ![Image: 670nm Longpass Filter](https://www.optofilters.com/uploads/allimg/20250716/1-250G6142140308.webp) 670nm Longpass Filter The 670nm longpass filter is designed to deliver reliable optical performance for professional systems, with parameters optimized to meet strict application demands. Its ability to separate wavelengths precisely makes it a valuable component in various setups. Key Performance This filter stands out for its sharp wavelength separation. It achieves over 90% transmission from 680nm to 1100nm, ensuring efficient passage of longer wavelengths. Meanwhile, it blocks 350nm to 650nm wavelengths with less than 1% transmission, minimizing interference from shorter wavelengths. The 50% transmission point (CWL) is tightly controlled at 670nm±5nm, ensuring consistent cutoff performance. With a standard thickness of 1.0mm (other thicknesses available in stock) and a 60/40 surface finish, it reduces light scattering and maintains optical clarity—critical for maintaining signal integrity in high-precision systems. Application Cases Infrared Imaging Systems: By blocking visible light (350-650nm) and transmitting near-infrared (680-1100nm), it enhances image contrast in thermal imaging cameras, making it ideal for industrial inspection and security surveillance. Spectroscopy: In material analysis, it isolates the near-infrared spectrum, ensuring accurate measurements by eliminating visible light interference that could skew results. Laser Systems: Protects sensitive detectors in 808nm or 980nm laser setups by blocking stray visible light, improving system stability and measurement accuracy. Customization & Availability Beyond standard options, we offer tailored solutions to fit your equipment: Sizes & Shapes: Available in square, round, or irregular shapes, with custom dimensions to match your housing requirements. Mounting: Can be pre-fitted into lens rings for easy integration into your optical assemblies. OPTOStokes maintains a large inventory of 670nm longpass filters for quick shipment. For custom needs, our production lines ensure international-quality standards, with controlled lead times and consistent performance. Addressing Your Needs Struggling with filters that fail to block stray light or lack consistent transmission? Our 670nm longpass filter delivers reliable blocking and transmission, backed by rigorous quality checks. Whether you need a standard size from stock or a custom design, we’re here to help. Reach out at sales@optofilters.com or leave a message on our site to discuss your requirements—our team will respond promptly with tailored solutions. --- ## BP520 Bandpass Filter 20nm (PCR ) **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/82.html **Summary**: BP520 bandpass filter (PCR): 515-525nm T>90%, 20nm FWHM, high OD blocking. 1.0mm. Stock/custom from OPTOStokes for fluorescence PCR. > **Detail Content:** ### BP520 Bandpass Filter 20nm (PCR-Specific) ![Image: BP520-20nm-1.0mm PCR.webp](https://www.optofilters.com/uploads/allimg/20250930/1-250930112AX40.webp) Specifications: Transmission: 515-525nm @ Tave>90% FWHM: 20±2nm Center Wavelength (CWL): 520±2nm Blocking: 350-500nm (ODave>5), 540-800nm (ODave>6), 800-1050nm (OD>3) Thickness: 1.0mm Surface Quality: 60/40 (industry standard for optical precision) Part Application: Dedicated for real-time fluorescence PCR systems This BP520 bandpass filter is engineered for PCR applications, fine-tuning wavelength isolation to capture 520nm-range fluorescence signals (e.g., from SYBR Green or FAM dyes). Its high OD blocking minimizes cross-talk from excitation light or ambient noise, ensuring accurate PCR result readouts. ### Key Applications Real-time PCR detection: Isolates 515-525nm emission signals, critical for quantifying nucleic acids without interference from 350-500nm excitation light. Fluorescence imaging for molecular biology: Compatible with 520nm fluorophores in post-PCR sample analysis. Diagnostic equipment: Integrates into compact PCR machines, thanks to its 1.0mm thin design. ### Custom Options Available in custom shapes: circular, square, or irregular cuts. Optional lens mounts (retainers) are offered to fit specific PCR instrument slots—no extra modification needed. OPTOStokes stocks BP520 PCR filters for immediate shipment. Need tailored specs (e.g., adjusted FWHM or OD)? Our precision manufacturing meets international standards, with controlled lead times for custom orders. Struggling with PCR signal interference? Email sales@optofilters.com or leave a message with your instrument model—we’ll help you match the right filter. --- ## BP460 Bandpass Filter - 60nm FWHM **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/81.html **Summary**: NBP905nm > **Detail Content:** ### BP460 Bandpass Filter - 60nm FWHM ![Image: BP460-60nm-1.1mm.webp](https://www.optofilters.com/uploads/ueditor/20250930/1-250930112022146.webp) Key Specifications: Product Code: 20210526 Transmission: 430-480nm @ T > 90% FWHM: 60 ± 3nm CWL: 460 ± 3nm Blocking: 350-1100nm @ T < 1% Thickness: 1.1mm This BP460 bandpass filter nails narrowband isolation, letting through just the right light while shutting out the rest. We've tuned it for sharp edges and high throughput, perfect for setups where every photon counts. The 60nm FWHM keeps things tight without sacrificing signal strength, and that 1.1mm thickness handles everyday rigors in lab or field use. Think fluorescence microscopy: it isolates 460nm emission from blue dyes like DAPI, cutting stray light that muddies your images. Researchers often wrestle with bleed-over in multi-color stains—our filter sharpens contrast, making faint signals pop. Or in laser spectroscopy, it carves out clean bands for Raman scattering, dodging noise from broadband sources and speeding up your data pulls. Customization's our edge. Go square, round, or oddball shapes to fit your mount. Want it in a lens holder? Just say. We've got stacks in stock for fast picks, or we'll tweak to your blueprint—global-grade coatings, steady lines, and timelines you can bank on. OPTOStokes delivers filters that just work, every time. Hitting walls with spectral purity? Shoot an email to sales@optofilters.com or hit the inquiry form. Let's sort your optics puzzle. --- ## 30% Neutral Density Filter **Type**: Products **URL**: https://www.optofilters.com/NeutralDensityFilter/79.html **Summary**: ND10%OPTOStokes 30% neutral density filter: 350-1100nm T=30%±3%, 0.21mm thickness. In-stock, customizable. Contact sales@optofilters.com > **Detail Content:** ### 30% Neutral Density Filter | OPTOStokes ![Image: 30% Neutral Density Filter](https://www.optofilters.com/uploads/allimg/20250723/1-250H320035IB.webp) ### Technical Specifications | Parameter | Description | | | Transmission | 350-1100nm @ T=30%±3% | | | Thickness | 0.21mm (other thicknesses in stock) | | | Surface Quality | 60/40 scratch-dig | | ### About This Filter Our 30% neutral density filter provides precise, uniform light attenuation across 350-1100nm, reducing intensity by 70% while maintaining spectral neutrality. At just 0.21mm thick, it’s ideal for space-constrained systems needing consistent 30%±3% transmission. ### Key Advantages Uniform 30%±3% transmission across 350-1100nm for consistent light control Ultra-thin 0.21mm design fits tight spaces in compact optical systems Spectrally neutral—preserves color balance in imaging and measurement 60/40 surface quality minimizes scattering, ensuring clean signal transmission ### Applications Laser Systems: Safely reduces 350-1100nm laser intensity to protect detectors without altering beam characteristics Compact Imaging: Controls exposure in small-format cameras and endoscopes where space is limited Spectroscopy: Adjusts light levels to match detector ranges, improving accuracy in material analysis ### Stock & Custom Options 0.21mm thickness and standard sizes are in stock for immediate delivery. Need specific dimensions? Choose circular, square, or custom shapes—with optional thin-profile mounts for seamless integration. ### Why OPTOStokes? Our neutral density filters meet international standards, with ready inventory for urgent needs. Custom attenuation levels or ultra-thin designs? Our team delivers precise, on-time results. Trusted quality for light control applications. ### Contact Us Need reliable 30% light attenuation? Email sales@optofilters.com or message us—we’ll find your perfect fit. --- ## DM647 Dichroic Mirror: 647 nm Laser Beam Splitter for Fluorescence Systems **Type**: Products **URL**: https://www.optofilters.com/DichroicMirror/78.html **Summary**: OPTOStokes DM647 Dichroic Mirror provides high efficiency ($>95\%$ T) from 660-850nm and deep blocking ($<1\%$ T) from 400-635nm at 45° AOI. Ideal for multi-laser systems and advanced fluorescence. > **Detail Content:** ### DM647 Dichroic Mirror: 647 nm Laser Beam Splitter for Fluorescence Systems The OPTOStokes **DM647 Dichroic Mirror** is a high-performance optical component specifically engineered for demanding multi-wavelength applications, primarily serving as a key element in advanced fluorescence microscopy and laser beam combination systems. With its sharp cut-off near $647\text{nm}$, this mirror efficiently separates short-wavelength excitation light from longer-wavelength emission signals, ensuring maximum signal collection and minimal cross-talk. ### Critical Technical Specifications Our DM647 mirror is built on a thin $1.1\text{mm}$ substrate, optimizing it for integration into standard filter cubes and high-speed, compact optical paths. | Parameter | Specification | | | Cut-off Wavelength ($\lambda_{\text{cut}}$) | 647 nm (Nominal) | | | Incidence Angle (AOI) | 45° (Degrees) | | | Transmission Performance (T) | > 95% T from 660 nm to 850 nm | | | Reflection/Blocking Performance (R) | > 99% R or T < 1% from 400 nm to 635 nm | | | Substrate Thickness | 1.1 mm (Thin Substrate) | | ### Engineered Performance and Optical Advantages The **DM647 Dichroic optical filter** is defined by its ability to provide extreme spectral separation at a 45° angle of incidence (AOI), making it the optimal choice for creating multi-wavelength optical channels. High Efficiency Separation: The mirror provides **Extremely High Transmission** ($> 95\%$) in the long-wavelength region ($660\text{nm} - 850\text{nm}$), ensuring maximal signal collection (e.g., Cy5 emission). Deep Rejection: It delivers **Deep Rejection** of the short-wavelength excitation light ($400\text{nm} - 635\text{nm}$), preventing laser or excitation noise from reaching the detector. Thin Substrate Advantage: The $1.1\text{mm}$ thickness helps minimize beam displacement, aberrations, and system footprint, essential in complex, multi-element optical assemblies. ### Core Applications The precise $647\text{nm}$ cut-off makes this mirror indispensable for several specialized fields: Fluorescence Microscopy: Ideal for systems using red-emitting dyes like Alexa Fluor 647 or Cy5, where the mirror reflects the $647\text{nm}$ excitation laser and efficiently transmits the longer-wavelength emission signal to the camera or detector. Laser Beam Combining: Used as an beam splitter to combine a laser beam (e.g., $630\text{nm}$ laser reflected) with a longer-wavelength signal (e.g., Near-IR transmitted). Confocal and Widefield Systems: Critical for separating fluorescence excitation and emission paths in research-grade instruments. ### OPTOStokes: Your Trusted OEM Optics Partner As a leader in thin film coatings, OPTOStokes offers both **in-stock** DM647 models and **high-level customization** to meet your exact system requirements. Our robust production line ensures world-class quality and reliable, predictable delivery schedules for your high-volume needs. Whether you require alternative cut-off wavelengths, tighter AOI tolerances, or different substrate thicknesses, our optical directors are prepared to deliver custom optical components that guarantee system performance. Need to integrate the DM647 or require custom wavelength separation optics? Contact our technical sales team for immediate availability, detailed spectral curves, or to discuss your custom project specifications. Email: sales@optofilters.com | Visit: www.optokens.com --- ## 700nm Longpass Filter **Type**: Products **URL**: https://www.optofilters.com/Longpass_Filter/77.html **Summary**: 700nm longpass filter: 350-630nm block <0.1%, 660-1100nm T>90%. In-stock, customizable. OPTOStokes ensures quality. Contact sales@optofilters.com > **Detail Content:** ### 700nm Longpass Filter ![Image: 700nm Longpass Filter](https://www.optofilters.com/uploads/allimg/20250716/1-250G6144U0G0.webp) The 700nm longpass filter is engineered for precision in demanding optical systems, with parameters that set a high standard for wavelength control. Its design focuses on minimizing interference while maximizing signal integrity—critical for applications where accuracy can’t be compromised. Core Performance Superior Blocking: Achieves 90% light throughput from 660-1100nm, ensuring strong signal transmission in the target range. Sharp Cutoff: The 50% transmission point (CWL) is tightly controlled at 665nm±5%, creating a clear boundary between blocked and transmitted wavelengths. Mechanical Specs: Standard thickness is 1.0mm (other thicknesses available in stock), with a 60/40 surface finish to minimize scattering and maintain optical clarity. Application Cases Advanced Medical Imaging: In near-infrared (NIR) diagnostic equipment, the filter’s strict blocking of 350-630nm visible light ensures crisp imaging of deep tissue structures, where even small amounts of stray light can distort results. High-Resolution Spectroscopy: For material analysis requiring precise NIR measurements (e.g., pharmaceutical quality control), it eliminates visible light interference, delivering more accurate spectral data. Industrial Sensing: In automated inspection systems using 700-1100nm light sources, it enhances detection reliability by blocking ambient visible light, critical for consistent quality checks on production lines. Customization & Availability Beyond our extensive stock options, we offer tailored solutions to fit your setup: Flexible Sizing: Available in square, round, or irregular shapes, with custom dimensions to match your equipment’s housing. Mounting Options: Can be pre-assembled into lens rings for seamless integration into your optical assemblies. OPTOStokes maintains a large inventory of 700nm longpass filters for quick shipment. For custom orders, our production lines adhere to international quality standards, with reliable lead times and rigorous quality checks to ensure performance consistency. Solving Your Challenges Tired of filters that let unwanted light leak through, compromising your data? Our 700nm longpass filter’s --- ## 700nm Shortpass Filter **Type**: Products **URL**: https://www.optofilters.com/Shortpass_Filter/76.html **Summary**: 700nm shortpass filter: 400-700nm transmission >90%, 350-1100nm blocking <1%. Custom sizes available. OPTOStokes – stock options, quality guaranteed, on-time delivery. > **Detail Content:** 700nm Shortpass Filter ![Image: 700nm Shortpass Filter](https://www.optofilters.com/uploads/allimg/20250715/1-250G5162933b9.webp) Designed for precision optical applications, our 700nm shortpass filter delivers exceptional performance tailored to critical wavelength requirements. With a 50% transmission cutoff (CWL) at 700nm±5nm, it ensures sharp separation between transmitted and blocked wavelengths—making it a reliable choice for systems demanding accuracy. Key Performance High Transmission: Maintains >90% light throughput across 400-700nm, preserving signal integrity in the visible spectrum. Superior Blocking: Blocks >99% of light from 350-1100nm, minimizing interference from ultraviolet and infrared wavelengths. Standard Size: Available as 66mm×66mm×1.0mm large sheets, ideal for bulk integration or further processing. Application Cases This filter excels in scenarios requiring clean visible light isolation: Machine Vision: Enhances image clarity in industrial inspection (e.g., electronics or packaging) by blocking infrared noise, ensuring accurate defect detection under visible lighting. Fluorescence Imaging: Critical in life sciences, it filters out UV and infrared background, sharpening fluorescent signal contrast in microscopy. Spectroscopy: Improves measurement precision by isolating visible wavelengths, essential for material analysis and colorimetry. Custom Solutions Beyond standard sizes, we offer tailored processing to fit your equipment: Shapes: Square, round, or custom  (irregular shapes) to match housing constraints. Integration: Pre-assembled with lens mounts/carriers for direct system installation. Backed by OPTOStokes’ commitment to quality, our filters meet international standards, with ample stock for quick turnaround and scalable production for custom orders. Need More Details? Whether you require a specific dimension or want to verify compatibility with your setup, contact us at sales@optofilters.com or leave a message—our team will assist promptly. --- ## 808nm Bandpass Filter **Type**: Products **URL**: https://www.optofilters.com/Bandpass_Filter/75.html **Summary**: 808nm bandpass filter: CWL 808±3nm (T>90%), FWHM 30±3nm, 400-1100nm block <1%. Customizable, in-stock. OPTOStokes ensures quality & on-time delivery. > **Detail Content:** ### 808nm Bandpass Filter The 808nm bandpass filter is engineered to deliver precise optical performance, making it a standout choice for various professional applications. Its key parameters are designed to meet the strict demands of optical systems. ### Core Performance Central Wavelength (CWL): With a CWL of 808±3nm and transmission over 90% at this wavelength, it ensures efficient passage of the target light. Full Width at Half Maximum (FWHM): A FWHM of 30±3nm allows for accurate isolation of the 808nm band, minimizing unwanted wavelength interference. Blocking Range: It effectively blocks light from 400nm to 1100nm with transmission less than 1%, ensuring minimal noise in the optical path. Surface Finish: Boasting a 60/40 surface finish, it reduces scattering and ensures smooth light transmission. ### Application Cases Laser Systems: In 808nm diode laser setups, this filter helps in isolating the laser wavelength, enhancing the efficiency and stability of the laser system. It’s crucial for laser pumping and laser material processing. Medical Devices: Used in certain medical diagnostic equipment, it can filter out irrelevant wavelengths, ensuring accurate detection and analysis of biological samples under 808nm light excitation. Industrial Sensing: In industrial sensors that rely on 808nm light, the filter improves the signal-to-noise ratio, enabling precise measurement and detection in production lines. ### Customization Options We understand that different applications have unique requirements. That’s why we offer customization for this filter: Sizes & Shapes: Available in square, round, and irregular shapes, tailored to your specific equipment dimensions. Mounting: Can be fitted into lens rings for easy integration into your optical systems. At OPTOStokes, we have a large stock of this filter for quick selection. For custom needs, our well-equipped factory ensures that the production meets international quality standards, with controllable delivery times and reliable quality. ### Get in Touch If you need more information about the 808nm bandpass filter, or have specific customization requirements, feel free to email us at sales@optofilters.com or leave a message on our website. Our team will respond promptly to assist you. --- # Section: Articles ## The Physics of Detection: Excitation, Emission, and the Stokes Shift **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/248.html **Summary**: A technical guide for R&D engineers to match laser lines (405, 488, 561, 640, 730nm) with optimal fluorophores. Discover how OPTOStokes OD6 filters maximize contrast and prevent bleed-through. > **Detail Content:** ### Optimizing Signal-to-Noise Ratio for DAPI, GFP, mCherry, Cy5, and NIR Imaging   ![Image: Optimizing Signal-to-Noise Ratio for DAPI, GFP, mCherry, Cy5, and NIR Imaging](https://www.optofilters.com/uploads/allimg/20250930/1-250930105H2147.webp) In Laser Scanning Confocal Microscopy (LSCM), image quality depends entirely on the efficient management of photons. The core mechanism relies on the Stokes Shift—the difference between the peak excitation wavelength (laser source) and the peak emission wavelength (fluorescence signal). For optical engineers and researchers, selecting the correct fluorescence filter set is not just about transmission; it is about blocking the excitation laser energy (often milliwatts of power) from reaching the sensitive detector. At OPTOStokes, we manufacture filters with OD6 deep blocking capabilities. This ensures that even high-power laser reflections are attenuated by a factor of 1,000,000, allowing only the weak fluorescence signal to pass through for maximum high SNR. ### 1. The 405 nm Line: UV and Blue Fluorescence The 405 nm diode laser is the standard for triggering blue fluorescence. Because this wavelength is in the UV/violet spectrum, standard filters often suffer from autofluorescence or quick degradation. OPTOStokes utilizes hard coating technology to withstand high-energy UV exposure without shifting or burning. | Target Dye | Excitation Peak (nm) | Emission Peak (nm) | Recommended OPTOStokes Solution | | | DAPI | 358 | 461 | High-throughput DAPI filter sets tailored for 405nm cut-off. | | | Hoechst 33342 | 352 | 461 | BP460nm with OD6 blocking at 405nm. | | | Alexa Fluor 405 | 401 | 421 | Ultra-steep shortpass filter designs to separate close Ex/Em peaks. | | ### 2. The 488 nm Line: The Cyan/Green Workhorse The 488 nm line (Argon or Solid State) is the most common laser in bio-imaging. The challenge here is distinguishing the emission signal from the laser line, as the Stokes shift can be narrow. We recommend narrow bandpass filters with rectangular transmission profiles to capture the full emission peak while rejecting the 488nm source. FITC & GFP: The gold standards for green labeling. Requires a precision LP530 or a specific bandpass like the high transmission 525/50nm. Alexa Fluor 488: Superior brightness requires filters with exceptional optical clarity to maximize photon collection. ### 3. The 561 nm Line: Yellow/Orange/Red Excitation Used for the "Red" channel in standard multi-color imaging. When combining this with green dyes, multi-channel microscopy requires filters that prevent "bleed-through" (crosstalk) from the green channel into the red detector. Key targets include mCherry, TRITC, and Texas Red. For these, a BP565nm dichroic or specific 585nm emission filters ensure that only the specific red fluorescence is captured. Our Olympus filter cube compatible sets are pre-mounted for easy integration. ### 4. The 640 nm & 730 nm Lines: Deep Tissue and NIR Imaging Moving into the Far-Red and Near-Infrared (NIR) spectrum reduces scattering and allows for deep tissue imaging. However, standard filters lose efficiency here. OPTOStokes specializes in NIR imaging optics optimized for transmission up to 1100nm. ### 640 nm Excitation (Far-Red) This line excites dyes like Cy5 and Alexa Fluor 647. The critical component is a Cy5 filter with a steep cut-on to block the 640nm laser line. Applications often involve cell cycle analysis using deep red filter sets. ### 730 nm Excitation (NIR) Used for Cy7 and Alexa Fluor 750. Detection here requires detectors and filters sensitive to IR. Our Cy7 and NIR fluorescence filters utilize advanced dielectric coatings to maintain >95% transmission even in the infrared range, unlike traditional absorption glass. ### Master Compatibility Matrix To assist in your optical system design, use the following matrix to match laser lines with OPTOStokes filter solutions. | Laser Line | Primary Fluorophores | Emission Range | Recommended OPTOStokes Solution | | | 405 nm | DAPI, Hoechst, BFP | 450 - 480 nm | DAPI filter (Hard Coated) | | | 488 nm | GFP, FITC, AF488 | 500 - 550 nm | LP530 or Bandpass 525/50 | | | 561 nm | mCherry, TRITC, Texas Red | 570 - 630 nm | mCherry & ROX filter set | | | 640 nm | Cy5, AF647, APC | 660 - 720 nm | 647nm Laser Line Blockers | | | 730 nm | Cy7, AF750, IRDye 800 | 760 - 850 nm | wide NIR Bandpass Series | | ### Why Choose OPTOStokes for Confocal Applications? Confocal microscopy places extreme stress on optical components. Soft-coated filters burn out, shifting their spectral edges and ruining experiments. OPTOStokes guarantees: Durability: IAD Hard Coating technology tested for high heat and humidity resistance. Precision: high-precision optical filter substrates with parallelism --- ## Season’s Greetings: Wishing You a Brilliant and Precise Holiday **Type**: Articles **URL**: https://www.optofilters.com/company-news/247.html **Summary**: Merry Christmas 2025! OPTOStokes thanks our global partners for a year of precision and trust. Wishing you a brilliant holiday and a successful 2026. > **Detail Content:** ![Image: Wishing Our Global Partners a Merry Christmas](https://www.optofilters.com/uploads/allimg/20251223/1-251223151031121.webp) As the festive lights of 2025 begin to shine, the team at OPTOStokes would like to extend our warmest holiday greetings to our esteemed customers, R&D engineers, and partners across the globe. ### Reflecting on a Year of Clarity For us, 2025 has been a year defined by the "Power of Precision." We are deeply grateful for the trust you have placed in our optical filter solutions to power your most critical projects. Just as a high-quality filter brings clarity to a complex spectrum, your collaboration has brought focus and success to our shared endeavors. ### Looking Ahead to 2026 At OPTOStokes, we remain committed to delivering high-performance optical filter technology and industry-leading customization services. We look forward to supporting your upcoming innovations in the New Year with the same world-class quality and predictability you’ve come to expect from www.optokens.com. May your Christmas be filled with joy, and may the New Year bring unmatched clarity and prosperity to your professional and personal life. Holiday Support Note:While our team takes a brief moment to celebrate, we remain available for urgent technical inquiries. Please feel free to reach us at sales@optofilters.com during the holiday season. Warmest Regards,The OPTOStokes Team --- ## High-Performance Optical Filter Solutions for Precision Industrial Detection **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/242.html **Summary**: Discover OPTOStokes high-transmittance optical filters (≥95%) for industrial detection. Durable from -20°C to 80°C, supporting OEM & custom requirements. > **Detail Content:** ![Image: Reliability from -20°C to 80°C](https://www.optofilters.com/uploads/allimg/20250930/1-250930105G0564.webp) In the field of modern optoelectronics, the efficiency of an optical filter directly determines the signal-to-noise ratio and the overall accuracy of precision instruments. OPTOStokes provides world-class optical filter solutions specifically engineered for high-demand environments. Our products achieve a high transmittance of ≥95%, ensuring minimal energy loss in critical light paths for imaging and analytical applications. ### Advanced Coating Technology & Spectral Stability Utilizing state-of-the-art high precision coating techniques, OPTOStokes filters exhibit exceptional spectral steepness and out-of-band blocking. Whether for a bandpass filter or a longpass filter, our thin film coatings are deposited using advanced Vacuum sputtering processes. This results in a hard coating that is chemically inert and mechanically robust, preventing degradation even in high-humidity or corrosive industrial settings. ### Environmental Durability: -20°C to 80°C Industrial detection often occurs in fluctuating thermal environments. Standard filters frequently suffer from "temperature drift," where the center wavelength shifts as the temperature changes. OPTOStokes high-performance optical filter series is optimized for thermal stability across a 100-degree range (-20°C to 80°C). This ensures that your optical component maintains consistent performance in outdoor monitoring, engine bay inspections, or high-intensity Laser optics systems. ### Technical Specifications Comparison | Parameter | OPTOStokes Standard | Industry Average | | | Peak Transmittance | ≥95% (Custom up to 98%) | 85% - 90% | | | Operating Temperature | -20°C to +80°C | 0°C to +50°C | | | Blocking Depth | Up to high OD filter (OD6) | OD3 - OD4 | | | Surface Quality | 20/10 Scratch/Dig | 60/40 Scratch/Dig | | ### Versatile Applications in Science & Industry Our filters are widely adopted by R&D engineers for diverse high-tech sectors: Life Sciences: High-contrast fluorescence detection for multi-channel microscopy and PCR detection. Spectroscopy: Ultra-narrow filters for Raman spectroscopy and Raman spectroscopy filters. Machine Vision: Enhancing Vision system contrast using specialized optical filters for machine vision. Laser Systems: Reliable laser bandpass filter options for 905nm, 940nm, and 1064nm applications. ### Customization and OEM Capabilities At www.optokens.com, we understand that off-the-shelf solutions don't always meet the unique requirements of a complex optical system. We offer custom optical filter design services, including custom sizes, substrates, and spectral profiles. From a single 0.7mm optical filter to large-scale OEM production runs, OPTOStokes ensures a robust production line and predictable lead times. ### Solving Your Optical Challenges Are you struggling with signal noise in your industrial sensors? Or perhaps your current suppliers have unacceptably long lead times for custom optical filters? Many engineers face the dilemma of choosing between high cost and subpar quality. OPTOStokes eliminates this compromise by providing precision optics that meet international standards at a competitive price point. Contact our technical team today for a quote or a consultation:Email: sales@optofilters.comExplore our extensive in-stock selection at www.optokens.com. --- ## Ultra-Narrow Bandpass Filters (FWHM≤ 2nm) for High-Precision Optics **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/231.html **Summary**: ultra-narrow bandpass filter 785nm, 1064nm narrowband filter stock, custom 1nm FWHM filter, OD4 deep blocking narrowband filter > **Detail Content:** OPTOStokes ultra-narrow bandpass filters are engineered for applications that demand extreme wavelength selectivity. With full-width at half-maximum (FWHM) of 1-2 nm, peak transmission ≥85% (typically >90%), and blocking ≥OD4 across the rejection band, these filters provide the precision required in laser systems, Raman spectroscopy, fluorescence microscopy, and LiDAR. ### Key Performance Advantages These filters combine exceptionally narrow bandwidth with deep blocking and high transmission—performance that is difficult to achieve simultaneously in thin-film coatings. Center wavelength accuracy reaches ±0.3 nm for most visible/NIR lines, ensuring perfect alignment with common laser sources (405 nm, 532 nm, 785 nm, 1064 nm, etc.). ### In-Stock Ultra-Narrow Series (Immediate Delivery) We maintain ready inventory of the most requested laser wavelengths in standard ∅12.7 mm and ∅25.4 mm mounted sizes. Ultra-Narrow Bandpass Filter Specifications| Product | CWL | FWHM | Peak  Transmission | Blocking  Range | Blocking  Depth | Mounted  Sizes | | | UNBP-420 | 420 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | ∅12.7 mm   &   ∅25.4 mm | | | UNBP-558 | 558 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-582 | 582 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-777 | 777.2 ± 0.3 nm | 1.2 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-785 | 785 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-795 | 795 ± 0.3 nm | 2 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-926 | 926.3 ± 0.5 nm | 1.5 ± 0.5 nm | >85% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-1064 | 1064 ± 0.5 nm | 1.7 ± 0.5 nm | >80% | 400-1100nm (customizable) | ≥OD4 | | | UNBP-1570 | 1570 ± 1 nm | 5 ± 1 nm | >90% | 400-1100nm (customizable) | ≥OD4 | | ### Full Customization Capability Need a different center wavelength, narrower/sharper FWHM, extended blocking to OD6, or unmounted substrates? Our ion-assisted deposition lines routinely achieve FWHM down to 0.5 nm and blocking beyond OD6 when required. Substrate size, shape, and AOI requirements are fully supported. ### Typical Applications • Laser line cleanup and fluorescence emission isolation • Low-wavenumber Raman spectroscopy • LiDAR transmitter/receiver filtering • Hyperspectral imaging • Biomedical instrumentation and flow cytometry ### Get the Exact Filter You Need – Fast Most in-stock items ship within 48 hours. Custom designs typically deliver in 3-5 weeks with guaranteed specifications and full traceability. Contact our technical team at sales@optofilters.com for datasheets, transmission curves, pricing, or to discuss your specific wavelength requirements. OPTOStokes delivers world-class ultra-narrow bandpass performance you can rely on. --- ## What is the relationship between the optical coating technology and the final cost of a custom filter? **Type**: Articles **URL**: https://www.optofilters.com/faq/175.html **Summary**: The optical coating applied to the substrate is a major cost factor. More sophisticated coating techniques, which deliver better optical clarity, durability, and tighter spectral c > **Detail Content:** The optical coating applied to the substrate is a major cost factor. More sophisticated coating techniques, which deliver better optical clarity, durability, and tighter spectral control, are significantly more expensive. Standard Evaporation: Lower cost, suitable for less stringent applications. Ion-Assisted Deposition (IAD): Medium to high cost. Improves film density and adhesion, resulting in more durable filters with less spectral drift due to environmental changes. Magnetron Sputtering (Sputtering): Highest cost. This advanced process provides the tightest control over layer thickness and deposition uniformity, essential for complex designs like narrowband optical filter or high OD bandpass filters and dichroic optical filter mirrors. The higher cost reflects longer production times and the use of expensive, high-vacuum equipment. --- ## How does the selection of the optical substrate material influence the price of a custom optical filter? **Type**: Articles **URL**: https://www.optofilters.com/faq/174.html **Summary**: Discover how the choice of optical glass—like BK7, fused silica, or specialty materials—determines the final price of your custom optical filters due to purity and processing costs. > **Detail Content:** The base material or optical substrate is a primary cost driver. Common materials like BK7 are less expensive, while fused silica costs more due to its superior transmission, thermal stability, and low coefficient of thermal expansion, making it ideal for demanding applications. Highly specialized materials, such as sapphire or ZnSe (often used for far-infrared or high-power laser systems), significantly increase the cost. The cost is tied to: Raw Material Purity: High-purity optical glass is more expensive but ensures better optical homogeneity and minimal defects. Processing Difficulty: Harder or specialized materials require more complex, time-consuming grinding and polishing steps, leading to higher manufacturing costs. Refractive Index Consistency: Tighter control over the refractive index across batches adds to the material's premium. --- ## Factors Influencing the Price of Custom Optical Filters **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/173.html **Summary**: Learn how materials, wavelength, thickness, and coating technologies influence the price of custom optical filters. A practical guide for optical engineers and buyers. > **Detail Content:** ### Factors Influencing the Price of Custom Optical Filters When designing custom optical filters, engineers and procurement teams often wonder why prices vary so widely for filters that appear similar in function. In reality, the cost is influenced by multiple technical and manufacturing parameters, including the choice of optical glass, coating type, wavelength range, and precision requirements. This article provides a clear breakdown of these factors to help you make informed design and purchasing decisions. ### 1. Material Selection and Optical Substrate The base material or substrate of a filter significantly affects its price. Common substrates include BK7, fused silica, and infrared-grade materials. High-purity optical glass offers superior transmission and thermal stability, but it also comes with higher raw material and processing costs. Specialized materials like sapphire or ZnSe are often used for infrared or high-power laser applications, which further increase the cost. ### Key Considerations: Refractive index consistency across production batches Surface quality and flatness tolerance Optical homogeneity of the glass ### 2. Optical Coating Technology The type and complexity of the optical coating applied to the filter surface represent another major cost factor. High-precision thin-film coatings, such as ion-assisted deposition or magnetron sputtering, can achieve tighter spectral control and durability compared to traditional evaporation coatings. However, they require longer process times and more expensive equipment. ### Common Coating Types: Bandpass filters – allow a narrow wavelength range while blocking others Dichroic filters – reflect one spectral band and transmit another Neutral density filters – attenuate light evenly across wavelengths ### 3. Wavelength Range and Design Complexity Every optical system operates within a defined wavelength range. Filters designed for UV or IR applications require specialized coatings and substrates, increasing both material and testing costs. Additionally, complex optical design requirements—such as multi-layer interference stacks—demand high computational modeling and precision control, which impact production time and yield. ### 4. Dimensional Tolerances and Thickness Physical dimensions also play a critical role. A tighter tolerance in diameter or filter thickness can significantly raise production costs due to additional polishing and quality control steps. For example, a 0.1 mm tolerance may double the time required compared to a standard ±0.5 mm specification. ### 5. Optical Performance Requirements Performance indicators like transmission rate, surface roughness, and blocking level define the final price. High transmission and low reflection often require more coating layers, while higher blocking levels demand enhanced absorption or reflection control. Filters for high-energy or imaging systems must also meet stricter environmental and thermal stability tests. ### 6. Example: Parameter Impact on Cost The following table summarizes how different design parameters influence manufacturing cost trends for custom optical filters. | Parameter | Specification Example | Cost Trend | Impact Explanation | | | Material | BK7 → Fused Silica → Sapphire | Low → Medium → High | Higher purity and thermal tolerance increase cost. | | | Coating Type | Evaporation → Ion-Assisted → Sputtering | Low → Medium → High | More layers and precision require advanced deposition systems. | | | Wavelength Range | Visible → NIR → IR | Low → Medium → High | Infrared filters need specialized materials and testing equipment. | | | Thickness Tolerance | ±0.5 mm → ±0.2 mm → ±0.1 mm | Low → Medium → High | Tighter tolerances require more polishing and QC time. | | | Transmission Rate | 85% → 90% → 95% | Low → Medium → High | Higher transmission often means more layers and better substrate quality. | | ### 7. Practical Tips for Engineers and Buyers When specifying a custom optical filter, clearly defining the required spectral and mechanical parameters at the early design stage helps avoid unnecessary cost escalation. Engineers should communicate both functional requirements and acceptable tolerances to suppliers, allowing them to balance cost and performance effectively. ### Conclusion Understanding how optical filters are priced is essential for both designers and procurement specialists. Each factor—from material selection to coating technology and dimensional precision—plays a role in the final quotation. By analyzing these elements systematically, teams can make data-driven trade-offs and achieve both technical performance and budget efficiency. Learn more: To explore customized solutions or discuss your specific filter design requirements, contact our technical team to get expert advice and quotation support. --- ## The Essential Role of High-Precision IPL Bandpass Filters: Quality Over Quantity **Type**: Articles **URL**: https://www.optofilters.com/case/172.html **Summary**: OPTOStokes provides high-precision IPL Bandpass Filters for optimal spectral performance. Discover why filter quality, spectral purity, and custom engineering outperform mere quantity. Get world-class OEM optics. > **Detail Content:** ### The Essential Role of High-Precision IPL Bandpass Filters: Quality Over Quantity Intense Pulsed Light (IPL) technology is a critical component across various fields, including aesthetic medicine, industrial inspection, and specialized lighting. The performance, safety, and efficacy of any IPL system are fundamentally determined by one core component: the IPL Optical Filter. At OPTOStokes, we transcend the conventional focus on filter count, prioritizing spectral purity, transmission efficiency, and long-term durability. This technical overview clarifies why superior optical engineering and material science are paramount over simply having more filters. ![Image: IPL Bandpass Filters](https://www.optofilters.com/uploads/allimg/20250930/1-250930105PXL.webp) ### Understanding the Core Physics of IPL System Optics IPL systems operate by emitting a broad spectrum of light (typically 400nm to 1200nm). The critical function of the filter is to precisely select the narrow band of wavelengths required for the specific application (e.g., targeting specific chromophores in medical devices or separating light channels in industrial sensors), while safely and efficiently blocking the rest of the spectrum. The operational principle relies on the filter's ability to act as a precision spectral gate: Targeted Wavelength Selection: The filter (typically a longpass filter or a bandpass filter) is precisely designed to pass the required therapeutic or analysis wavelength range. Unwanted Wavelength Blocking: High optical density (OD) blocking must be applied to unwanted wavelengths. This is crucial for safety and system longevity, preventing photothermal damage to sensitive components and tissues. ### Why Filter Quality Decisively Impacts System Performance The market misconception that "more filters equal better performance" overlooks the fundamental parameters of optical physics and system integration. For R&D Engineers and Technical Decision-Makers, the focus should be on the following critical quality metrics, which form the foundation of OPTOStokes' offering: ### 1. Spectral Purity and Precision of the Cutoff The effectiveness of an IPL filter hinges on its ability to define a clear, sharp transition from the blocking region to the transmission region. Our filters are designed with exceptionally steep slopes, ensuring that only the desired therapeutic or analytical light reaches the target. This precision is quantified by: Defined Cut-on Wavelength ($ \lambda_{c} $): The wavelength at which the transmission rapidly increases, often defined at the 50% transmission point. High Transmission ($ T $): Maximizing the light energy in the passband (e.g., typically $> 90\%$ transmission). Deep Blocking (High OD): Ensuring superior attenuation of unwanted short-wavelength UV/Blue light and long-wavelength NIR/IR light, crucial for patient safety and minimizing side effects. Table 1: Example IPL Filter Application & Corresponding Wavelengths | OPTOStokes Filter Type (Example) | Target Wavelength Range ($\lambda$ in nm) | Primary Application/Target | | | LP515 Longpass Filter | 515 - 1200nm | Shallow Pigmentation (e.g., Freckles) | | | LP590 Longpass Filter | 590 - 1200nm | Deeper Pigment and Vascular Lesions (e.g., Rosacea, Telangiectasias) | | | LP640 Longpass Filter | 640 - 1200nm | Hair Removal, Collagen Remodeling | | | Custom Narrowband Filter | 530 ± 10nm | Fluorescence Imaging or Specific Dye Detection | | ### 2. Durability and Resistance to High Fluence IPL systems generate intense light pulses, subjecting the optical coating to extreme thermal and optical stress. Low-quality filters are susceptible to coating delamination, thermal drift, and spectral shifting. OPTOStokes employs robust thin-film deposition technologies, resulting in filters with: Exceptional Laser Damage Threshold (LDT): Our coatings maintain integrity even under the high energy densities characteristic of professional IPL equipment. Thermal Stability: Minimal spectral shift across the operational temperature range, ensuring consistent performance pulse after pulse. ### OPTOStokes: Your Partner in High-Volume, High-Precision Optics For R&D teams and Purchasing Managers facing strict project timelines and budget constraints, OPTOStokes offers a compelling advantage: Custom Optical Filter Expertise: With decades of experience in high-volume, precision coating, we support highly specific wavelength requirements, beam splitters, and unique form factors. Our custom coatings capability allows for precise adaptation to unique system designs. Extensive Stock & Predictable Supply Chain: Access to a wide selection of in-stock IPL filters minimizes lead times for prototyping and initial production runs, a crucial factor in accelerating your time-to-market. World-Class Quality Assurance: Every optical component undergoes rigorous testing to guarantee adherence to world-class quality standards, ensuring predictable system performance and reliable long-term operation for your end-users. ### The OPTOStokes Commitment: Solution-Driven Partnership Selecting the right optical filter is a crucial technical decision that impacts system efficacy and market compliance. Merely comparing the number of filters provided by a vendor is an inadequate metric. Engineers must demand verified performance data, including detailed spectral curves and LDT certification. Are you navigating a complex spectral requirement, or need a reliable, high-volume source for world-class IPL system optics? Our committee of optical engineers and supply chain specialists is ready to review your specifications and provide a solution that meets your technical and commercial needs. Achieve optimal signal-to-noise ratio and guaranteed quality for your next-generation IPL platform. Contact our technical sales team today for stock availability, detailed specifications, or to initiate a high-level customization project: Email: sales@optofilters.com | Visit: www.optokens.com --- ## Neutral Density Filters: A Complete Guide to Types & Selection **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/162.html **Summary**: Introduction to Neutral Density (ND) FiltersNeutral Density (ND) filters—often known as "anti-overexposure filters" in photography—uniformly reduce light intensity withou > **Detail Content:** ### Introduction to Neutral Density (ND) Filters Neutral Density (ND) filters—often known as "anti-overexposure filters" in photography—uniformly reduce light intensity without altering spectral distribution. They are critical in applications like photography, laser systems, and optical metrology, where precise light control is essential. ND filters are primarily categorized into two types: absorptive and reflective. ### Absorptive vs. Reflective ND Filters: Key Differences Choosing between absorptive and reflective ND filters depends on your application’s light intensity, wavelength, and heat management needs. The table below compares their core characteristics: | Characteristic | Absorptive ND Filters | Reflective ND Filters | | | | Working Principle | Absorbs light via doped materials (e.g., iron oxides) in the substrate. | Reflects light via thin metal coatings (Cr, Ag, Au) on the substrate. | | | | Stray Light | Low (minimal reflection). | High (reflected light requires a beam dump). | | | | Damage Threshold | Low (5 J/cm² @ 1064nm; no heat absorption). | | | | Spectral Stability | Variable (batch-dependent beyond specified wavelengths). | Stable (UV to IR, due to metal coating properties). | | | | Typical Applications | Photography, low-power LEDs, visible-light metrology. | High-power lasers, wide-spectrum optical systems. | | | ### Important Notes for Safe Use ### Absorptive ND Filters Do not use with high-power lasers—overheating can damage the substrate. Transmittance is adjusted via substrate thickness (each filter has a unique thickness). For consistent thickness ( --- ## Machine Vision Filters: Solving Glare, Overexposure & Noise **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/161.html **Summary**: Learn how machine vision filters solve glare, overexposure & noise. Guide to polarizing/bandpass filters. Stock/custom solutions from OPTOStokes. > **Detail Content:** ### Introduction: Filters – The "Eyes" Behind Reliable Machine Vision As automation transforms global manufacturing, machine vision systems serve as the "eyes" of machines, handling inspection, measurement, identification, and guidance. Yet industrial environments pose harsh challenges: intense ambient light, harsh specular glare, and invisible infrared (IR) interference. The solution to focusing on critical information while ignoring noise lies in a small but vital component: optical filters. ### Machine Vision Optics: How Filters Fulfill Their Role A standard industrial machine vision system follows this optical path: Light Source → Object → Lens → Filter → Image Sensor → Processor. Here’s the breakdown: A controlled light source illuminates the target object. The object reflects, transmits, or scatters light toward the lens. The lens collects the light signal. The filter acts as a "gatekeeper," screening the light before it reaches the sensor. The image sensor (either CCD - Charge-Coupled Device or CMOS - Complementary Metal-Oxide-Semiconductor) converts light to electrical signals. The processor analyzes the image data. Using principles of light-matter interaction (absorption, interference, polarization), filters perform three critical tasks: Boost SNR (Signal-to-Noise Ratio): Block ambient/stray light, letting only "signal light" from the controlled source pass through. Enhance contrast: Transmit wavelengths most relevant to target features, making defects or characters stand out. Protect sensors: Filter high-energy ultraviolet (UV) or intense IR radiation to prevent sensor damage. Without filters, machine vision systems would produce blurry, overexposed, or noisy images—rendering inspection or measurement unreliable. ### Filter Applications: Solving Industry-Specific Challenges Filter selection depends entirely on the optical challenge. Below is a detailed breakdown of common scenarios, with key parameters and principles: | Application | Challenge | Solution | Key Principles | Critical Parameters | | | Metal Surface Scratch/Character Inspection | Specular glare masks small scratches or printed characters. | Polarizing Filter | 15-30° low-angle illumination; cross-polarization (source polarizer perpendicular to lens polarizer) blocks glare, transmits scattered light from scratches. | Extinction Ratio: >1000:1 Transmission: >40% Polarization Direction: Linear | | | LCD/OLED Mura Defect Detection | Ambient light drowns out subtle brightness unevenness (Mura). | Narrowband Bandpass Filter | Darkroom setup; filter transmits only the screen’s peak emission wavelength, blocking mismatched ambient light. | CWL (Center Wavelength): Matches screen peak (e.g., 525±2nm) FWHM (Full Width at Half Maximum): 10-20nm Blocking Depth: OD>5 (300-1100nm) | | | High-Temperature Workpiece Sizing | IR thermal radiation from hot metal causes overexposure. | Blue Bandpass Filter | High-power 450nm blue LED illumination; filter transmits blue reflection, blocks 800-1200nm IR. | CWL: 450±2nm FWHM: 30-50nm IR Blocking: OD>6 (800-1200nm) | | | Food Sorting/True Color Recognition | Ambient light changes & IR sensitivity distort color accuracy. | IR Cut Filter / ND Filter | IR Cut blocks 700-1100nm IR (matching human vision); ND uniformly reduces light to avoid overexposure. | IR Cut: Cutoff 650-700nm, Visible Transmission >90% ND Filter: OD Value (e.g., OD0.6 = 25% transmission) | | ### Key Filter Parameters: A Selection Foundation Understanding these parameters ensures you choose the right filter for your system: CWL (Center Wavelength): The wavelength with maximum transmission. Must match the light source’s peak wavelength (e.g., 450nm for blue LEDs). FWHM: The wavelength range where transmission is 50% of the peak. Narrower FWHM (10-20nm) = better noise rejection; wider FWHM (30-50nm) = higher light throughput. Blocking Depth: Measured in OD (Optical Density); OD4 = 0.01% transmission, OD6 = 0.0001% transmission. Critical for blocking stray/IR light. Extinction Ratio (Polarizing Filters): Ratio of transmission for parallel vs. perpendicular polarization. Higher ratios (>1000:1) = better glare suppression. Angle of Incidence (AOI): AOI >15° shifts CWL to shorter wavelengths; account for this in lens-filter alignment. ### Core Selection Strategy: Ask the Right Questions Filter selection is a systematic process—start by answering these two questions: What is the interference source? Ambient light? Specular glare? IR radiation? Overexposure? What is the target signal light? Reflected light from a specific LED? Polarized scattered light? The object’s own emission? Matching the filter’s parameters to these answers ensures optimal performance. ### OPTOStokes: Your Machine Vision Filter Partner If you’re struggling with glare, overexposure, or color distortion in your machine vision system, OPTOStokes offers filters tailored to industrial needs. We provide a wide range of off-the-shelf filters (polarizing, bandpass, IR cut) and custom solutions—matching your light source wavelength, AOI, and blocking requirements. Our filters meet international quality standards, with controlled lead times to keep your production on track. Need help selecting the right filter for your application? Email sales@optofilters.com or leave a message on our website. Our team of optical engineers will analyze your system’s challenges and recommend a precise, reliable solution. --- ## Optical Lens Surface Roughness: Hidden Impact on Imaging Quality **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/160.html **Summary**: Learn how optical lens surface roughness affects imaging. Explore quantification (Ra/Rq), standards (ISO 10110), and selection tips. High-quality lenses from OPTOStokes. > **Detail Content:** ### Introduction: Surface Roughness – The Overlooked Factor in Optical Design As optical designers know, the seven primary aberrations of lenses (spherical, coma, astigmatism, field curvature, distortion, longitudinal chromatic, and lateral chromatic) are typically addressed by optimizing variables like curvature radius, lens thickness, material combinations, or aspheric profiles. Surface roughness, however, is often overlooked—assumed to be an "ideal smooth surface" in design. In reality, roughness arises during manufacturing, and its impact on imaging quality is far more significant than many realize. ### How Surface Roughness Degrades Imaging Quality Even a lens that appears perfectly smooth to the naked eye has a microtopography of tiny "peaks" and "valleys" at the nanoscale. When light hits this surface, two outcomes occur: Specular transmission: A portion of light follows the ideal optical path, forming a clear image. Diffuse scattering: Another portion scatters randomly across the image plane, creating "stray light." This stray light is the root cause of reduced contrast, halos around bright objects (e.g., nighttime streetlights), and ghosting—issues that become more pronounced in low-light or high-contrast scenarios (e.g., astrophotography, medical imaging). For example, a camera lens with excessive roughness may produce sharp daytime photos but blurry, haloed images in dim conditions. ### Quantifying Surface Roughness: Key Metrics The optical industry uses two primary metrics to measure surface smoothness, defined by international standards: | Metric | Definition | Typical Requirements by Application | | | Ra (Arithmetic Mean Roughness) | Average of absolute deviations from the mean surface line; reflects general "waviness." | Consumer optics (e.g., eyeglasses): Ra < 10 nm Professional optics (e.g., DSLR lenses): Ra < 5 nm High-end optics (e.g., microscope objectives): Ra < 1 nm | | | Rq (Root Mean Square Roughness) | Square root of the average of squared deviations; more sensitive to extreme peaks/valleys. | Medical optics (e.g., endoscopes): Rq < 3 nm Aerospace optics: Rq < 2 nm | | Common measurement tools include AFM (Atomic Force Microscopy) for nanoscale precision and white light interferometers for fast, large-area scans. ### International Standards for Surface Roughness Global optical quality is unified by strict standards that define roughness limits, test methods, and instrumentation: ISO 10110: International standard specifying optical component tolerances, including surface roughness (Part 8 covers surface imperfections). MIL-PRF-13830B: U.S. military standard with rigorous surface quality grades (e.g., Grade A for critical aerospace optics). Regional standards: GB/T (China), DIN (Germany), and JIS (Japan) align with ISO 10110 to ensure cross-market consistency. These standards are not arbitrary—they ensure optical components perform reliably across applications, from consumer electronics to life-saving medical devices. ### Sources of Surface Roughness in Manufacturing Roughness originates at every stage of lens production, making process control critical: Grinding: Abrasive particle size (e.g., 10 μm vs. 1 μm diamond grit) dictates the initial surface texture; larger particles leave deeper grooves. Polishing: Polishing pad hardness (Shore 50–70 for polyurethane), slurry chemistry (pH, abrasive concentration), and pressure affect final smoothness. Coating: Film deposition rate (too fast = porous, rough layers), substrate temperature (misaligned = uneven crystallization), and pre-coating cleaning (residues = patchy adhesion) all impact roughness. ### How to Select High-Quality Optical Lenses To identify lenses with optimal surface smoothness, use these practical criteria: Technical specifications: Request Ra/Rq values (avoid vague claims like "high precision"). Brand credibility: Trust manufacturers with documented compliance to ISO 10110 or MIL-PRF-13830B. Practical testing: In a dark room, shine a point light (e.g., laser pointer) through the lens—minimal halos or scatter indicate low roughness. Certification: Ask for third-party test reports (e.g., AFM scans) to verify roughness claims. ### Case Study: The Cost of Overlooking Roughness The Hubble Space Telescope’s initial imaging failure (1990) illustrates roughness’s impact: its primary mirror had a surface deviation of ~0.007 mm (1/50 the diameter of a human hair)—well above the required precision. This tiny imperfection caused severe spherical aberration, resulting in blurry images. The issue was resolved only by installing the Corrective Optics Space Telescope Axial Replacement (COSTAR) system, a costly reminder of the need for strict roughness control. ### OPTOStokes: Precision in Every Nanometer If you’re seeking optical lenses that balance macro design excellence with micro-scale smoothness, OPTOStokes delivers solutions aligned with international standards (ISO 10110, MIL-PRF-13830B). We offer a wide range of off-the-shelf lenses (with documented Ra/Rq values) and custom-designed optics tailored to your application—whether for consumer cameras, medical devices, or industrial imaging. Our controlled manufacturing processes ensure consistent roughness control, and our transparent technical documentation lets you verify quality upfront. Have questions about selecting lenses for low roughness, or need a custom solution? Email sales@optofilters.com or leave a message on our website. Our team of optical engineers will help you find the right lens to achieve clear, high-contrast imaging. --- ## Troubleshooting Optical Lens Edge Defects: Wrinkles & Dents **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/159.html **Summary**: Learn to identify & fix optical lens edge wrinkles/dents (polishing/coating causes). OPTOStokes offers tech support, custom solutions to boost yield. > **Detail Content:** ### Introduction to Optical Lens Edge Defects Wrinkles, dents, or "orange peel"-like defects on optical lens edges are typical yet critical issues in manufacturing. These flaws—often called "orange peel" (micro-waviness) or "pinholes" (localized dents)—compromise optical performance and product yield. To resolve them, a systematic analysis of root causes (polishing, coating, or their interaction) is essential. Typically, polishing irregularities are the primary cause, while coating processes may expose or exacerbate these defects. ![Image: Polishing/Coating Fixes for Yield Improvement](https://www.optofilters.com/uploads/allimg/20250930/1-250930105PLB.webp) ### Root Cause Analysis: Polishing vs. Coating Defects The core troubleshooting approach is comparative testing to isolate whether defects originate from the substrate (polishing) or post-deposition (coating). Below is a step-by-step method and diagnostic table for clarity: ### 1. Defect Localization Steps | Step | Method | Diagnostic Conclusion | | | 1. Pre-Coating Inspection | Examine polished/cleaned lenses under a microscope (consistent light/angle) before entering the coating chamber. | Defects present → Polishing Issue (coating only replicates flaws). | | | 2. Post-Coating Morphology Check | Observe defect texture if pre-coating samples are unavailable (e.g., wavy vs. layered wrinkles). | Wavy → Polishing; Layered → Coating Issue. | | | 3. Precision Instrument Testing | Use white light interferometer (3D topography) or film thickness monitor (coating uniformity). | Substrate → Polishing; Film-layer → Coating. | | ### 2. Key Differences Between Polishing & Coating Defects | Characteristic | Polishing-Related Defects | Coating-Related Defects | | | | Root Cause | Uneven polishing pressure, poor pad conformity, abrasive contamination | Excessive film stress, improper substrate temperature, poor adhesion | | | | Morphology | Micro-waviness (orange peel), localized pits | Layered wrinkles, edge delamination | | | | Material Sensitivity | More severe on soft substrates (e.g., BK7 vs. quartz) | Worse with high-stress films (e.g., TiO₂ vs. SiO₂) | | | ### Process Optimization Solutions Once the root cause is identified, targeted process adjustments will resolve defects. Below are actionable optimizations for both polishing and coating issues: ### 1. Polishing Process Optimization Pressure & Speed Adjustment: Reduce edge polishing pressure by 15-20% (varies by substrate) and optimize spindle-swing speed ratio (e.g., 1:3 for BK7 lenses) to ensure uniform material removal. Polishing Pad Improvement: Use flexible polyurethane pads (Shore hardness 60-70) for edge conformity; trim pad edges to match lens curvature (e.g., 5° bevel for convex lenses). Pre-Process Control: Ensure post-grinding surface roughness < 0.02 μm; use ultrasonic cleaning (40 kHz, 5 min) with high-purity detergent to remove abrasive residues. Clamping Optimization: Adopt vacuum-based flexible clamping to minimize edge stress (avoid mechanical hard clamping). ### 2. Coating Process Optimization Stress Reduction: Insert a stress-buffering layer (e.g., SiO₂ between TiO₂ layers) and reduce deposition rate to 0.5-1 Å/s (initial layer) to lower film stress. Temperature & Cleaning: Stabilize substrate temperature at 120-180°C (depends on film material) and add plasma cleaning (Ar gas, 500 W) for 2 min pre-coating to enhance adhesion. Deposition Environment: Maintain vacuum level < 5×10⁻⁶ mbar and optimize planetary rotation speed (10-15 rpm) to ensure uniform film thickness. Fixture Design: Use low-shadow fixtures (open-frame design) to minimize edge blocking of film vapor flow. ### Establishing a Defect Management System To prevent recurrence, implement a systematic management process: In-Process Inspection: Add IPQC (In-Process Quality Control) checks at two critical nodes: post-polishing (microscope inspection) and post-coating (interferometer scan). Cross-Team Collaboration: Collaborate with polishing/coating engineers to align process parameters (e.g., adjust polishing pressure if coating exposes defects). Data Traceability: Record process parameters (pressure, temperature, deposition rate) and defect details for each batch to enable rapid root-cause analysis. ### OPTOStokes: Your Partner for Optical Lens Quality If you’re struggling with persistent lens edge defects, low yield, or need tailored process support, OPTOStokes offers solutions aligned with international quality standards. We provide off-the-shelf optical components and custom-designed lenses (with optimized polishing/coating processes) to meet your specific needs—with controlled lead times and consistent quality. For personalized technical support or to discuss your lens quality challenges, email sales@optofilters.com or leave a message on our website. Our team will help you implement targeted fixes to boost product quality and yield. --- ## Fluorescence Filters: Features, Custom Solutions & Applications **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/142.html **Summary**: High-performance fluorescence filters for microscopy & FISH. Low stray light, custom solutions & compatible with major brands. Trust OPTOStokes' quality. > **Detail Content:** ### Fluorescence Filters: Essential Components for Precision Imaging Fluorescence filters are critical components in fluorescence microscopy, consisting of three key elements: Excitation Filter (EX), Dichroic Mirror (DM), and Emission Filter (EM). A high-quality filter set effectively blocks stray light, ensuring pure and sharp fluorescence imaging. The performance of these filters is heavily dependent on coating technology—optimized thin-film deposition enhances light transmittance while minimizing unwanted reflections. OPTOStokes integrates these components into high-efficiency filter cubes, delivering superior light throughput and imaging clarity. ### How Fluorescence Filters Work Typically constructed using optically clear glass substrates, fluorescence filters utilize thin-film coatings on both surfaces to control light transmission and reflection. Anti-reflective (AR) coatings—with thicknesses designed as quarter-wavelength multiples—maximize light passage at target wavelengths. In contrast, high-reflective (HR) coatings use half-wavelength thicknesses to enhance reflection through constructive interference. In practical applications, these filters function as integrated systems (filter cubes): Excitation Filter (EX): Transmits specific excitation wavelengths while blocking ambient light in the emission band Dichroic Mirror (DM): Reflects excitation light toward the sample while transmitting emitted fluorescence Emission Filter (EM): Further isolates fluorescence signals by blocking residual excitation light ### Key Features of High-Quality Fluorescence Filters ### 1. Optical Performance Metrics Low stray light: Precise alignment with fluorophore excitation/emission peaks (≤5% cross-talk) Deep blocking: Optical Density (OD) ≥6 to minimize background noise Low auto-fluorescence: Substrate and coatings designed to avoid self-emission interference ### 2. Mechanical Precision Surface flatness directly impacts imaging quality. Transmission Wavefront Distortion (TWD) is strictly controlled—typically ≤λ/4 at 633nm—per ISO 10110 standards to prevent focal shifts or image distortion. ### OPTOStokes Fluorescence Filter Solutions ### Custom Filters for Specialized Applications Tailored for advanced techniques like FISH (Fluorescence In Situ Hybridization), these filters optimize signal-to-noise ratios: | Model | Excitation (EX) | Dichroic (DM) | Emission (EM) | Application | | | Blue B2 | 450/50 | 485 | 495LP | Tuberculosis detection | | | Violet V | 405/30 | 440 | 450LP | Stereomicroscopy accessories | | | Yellow G2 | 560/40 | 600 | 610LP | Enhanced Y-channel imaging | | | Red R | 620/50 | 655 | 692/45 | CY5 & near-IR dyes | | | Dual-pass B/G | 470/40 & 575/35 | - | 525/40 & 625/60 | FISH projects | | ### Standard Filters for Common Wavelengths OPTOStokes offers BGUY series filters in longpass and bandpass configurations: | Type | Excitation (EX) | Dichroic (DM) | Emission (EM) | | | UV Longpass U | 330-385nm | 410 | 420LP | | | UV Bandpass U | 330-390nm | 415 | 435-485nm | | | Blue Longpass B | 460-495nm | 505 | 510LP | | | Blue Bandpass B | 460-495nm | 505 | 510-550nm | | | Green Longpass G | 510-555nm | 570 | 575LP | | | Green Bandpass G | 528-553nm | 565 | 578-633nm | | ### Compatible Filter Cubes OPTOStokes provides empty filter cubes compatible with major microscopy brands, including LEICA, OLYMPUS, ZEISS, and NIKON. These cubes can be pre-assembled with our fluorescence filters for plug-and-play integration, ensuring precise alignment and optimal performance. ### Why Choose OPTOStokes Fluorescence Filters? Whether you need standard configurations or custom solutions for specialized assays, OPTOStokes delivers: Extensive ready-to-ship inventory for rapid deployment, and custom coating services meeting international quality standards. Our complete production lines ensure consistent performance and controllable lead times. For microscopy setups requiring precise fluorescence filtering—from routine lab work to advanced FISH analysis—contact sales@optofilters.com or leave a message to discuss your specific requirements. --- ## Machine Vision Filters: Boosting Contrast & Performance **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/141.html **Summary**: Learn how machine vision filters enhance contrast. OPTOStokes’ interference filters offer high transmittance, wide FOV (30°), and stable spectra for precision systems > **Detail Content:** ### Using Filters in Machine Vision Systems In machine vision system design, enhancing image contrast is a primary consideration. While proper lighting, aperture size, and lens selection can improve contrast, integrating the right optical filter often achieves this more cost-effectively—with minimal impact on other system components. ### Types of Machine Vision Filters Machine vision filters fall into two main categories: ### 1. Absorptive Filters These filters use heavy metal-doped glass to selectively absorb specific light wavelengths. They remain widely used due to two key advantages: lower cost and angle insensitivity (performance stays consistent across varying incident angles). ### 2. Interference Filters These filters rely on thin-film interference to control light transmission/reflection. Compared to absorptive types, high-quality interference filters offer superior performance: higher transmittance, deeper cut-off (for unwanted wavelengths), and steeper spectral edges—critical for precise image contrast. ### OPTOStokes’ Machine Vision Filters: Engineered for Excellence OPTOStokes’ vision filters are interference-type, manufactured using advanced coating techniques. They outperform absorptive filters with: High transmittance: Maximizes signal from target wavelengths, enhancing image clarity. Deep cut-off: Effectively blocks stray light, reducing noise in critical applications. Steep spectral edges: Sharply separates desired and unwanted wavelengths, improving contrast in fine detail detection (e.g., barcode reading, defect inspection). ### Wide Field of View (FOV) Performance Modern machine vision systems increasingly use short-focal-length lenses to boost integration—resulting in larger FOVs. Conventional interference filters typically perform well only within a narrow incident angle range (0–5°), with significant spectral distortion or blue-shifting beyond 10° FOV. OPTOStokes addresses this through precision film design, optimization, and strict thickness control. Our filters maintain stable spectral performance even at a 30° FOV—ideal for wide-angle systems in automation, robotics, and high-speed inspection lines. ### Why Choose OPTOStokes for Your Machine Vision Needs? Whether you need off-the-shelf filters for standard systems or custom designs tailored to your specific wavelength, FOV, or environmental requirements, OPTOStokes delivers. Our filters meet international quality standards, with reliable lead times to keep your production on track. Struggling with contrast issues in wide-FOV systems? Need a filter that performs consistently across large angles? Contact our team at sales@optofilters.com or leave a message on our website. We’ll help you select the perfect filter to optimize your machine vision system. --- ## Narrow Band Imaging (NBI) Endoscopy: How It Works & Advantages **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/140.html **Summary**: Learn about NBI endoscopy: principles, 415nm/540nm filters, advantages over white light. OPTOStokes offers quality filters for precise GI diagnostics. > **Detail Content:** ### What Is Narrow Band Imaging (NBI) Endoscopy? Narrow Band Imaging (NBI) is an advanced endoscopic technology designed to enhance the visualization of gastrointestinal mucosal structures and blood vessels. Unlike traditional white light endoscopy, NBI uses specialized narrow-band filters to isolate specific wavelengths of light, improving the contrast between mucosal tissues and their underlying vascular networks—critical for detecting early-stage diseases like precancerous lesions or inflammation. ![Image: 415nm and 540nm filters optimized](https://www.optofilters.com/uploads/allimg/20250730/1-250I019522E43.webp) ### How NBI Technology Works Traditional electronic endoscopes use xenon lamps emitting "white light," a broad spectrum combining red (605nm), green (540nm), and blue (415nm) wavelengths. NBI systems replace these broadband filters with narrow-band filters, retaining only two key wavelengths: 415nm (blue light): Penetrates shallowly into mucosal layers, highlighting superficial capillary networks. 540nm (green light): Reaches deeper mucosal layers, visualizing intermediate vascular structures. Blood absorbs blue and green light strongly, creating a stark contrast between vascular tissues and surrounding mucosa. This "electronic staining" effect eliminates the need for chemical dyes, allowing instant switching between white light and NBI modes during procedures. ### Advantages of NBI Over Traditional Endoscopy NBI outperforms conventional white light endoscopy in several key areas: Enhanced vascular visualization: Sharply defines mucosal blood vessels, aiding detection of abnormal vascular patterns in conditions like Barrett's esophagus or colitis. Improved mucosal detail: Clearly shows glandular structures (e.g., irregular pits in early tumors), increasing diagnostic accuracy for precancerous lesions. Convenience: No need for dye spraying—simply toggle NBI mode, reducing procedure time and patient discomfort. Targeted wavelength penetration: Different NBI wavelengths (415nm/540nm) focus on specific tissue depths, providing layered insights into mucosal health. ### Clinical Applications of NBI NBI is widely used in gastrointestinal diagnostics, including: Detecting early-stage esophageal, gastric, and colorectal cancers by identifying abnormal vascularization. Evaluating Barrett's esophagus for dysplastic changes. Differentiating inflammatory bowel disease (IBD) from other mucosal disorders. Guiding biopsy sampling by highlighting suspicious areas with high precision. ### Trust OPTOStokes for NBI Filter Solutions The performance of NBI systems depends heavily on high-quality narrow-band filters. OPTOStokes offers 415nm and 540nm filters optimized for NBI endoscopy—designed to deliver precise wavelength isolation, consistent light transmission, and durable performance. Whether you need off-the-shelf filters for standard systems or custom specifications for specialized equipment, our products meet international medical device standards, ensuring reliable diagnostic results. For questions about NBI filter compatibility or to discuss your specific needs, email our technical team at sales@optofilters.com or leave a message on our website. We’ll help you find the right solution to enhance your endoscopic procedures. --- ## Fluorescence Filter Cube Holders (FL CUBE): Compatibility & Specs **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/139.html **Summary**: Discover FL CUBE filter holders for Olympus, Nikon, Leica, Zeiss. High-efficiency fluorescence cubes with sharp cut-ons, 93-97% transmittance. Stock & custom options from OPTOStokes. > **Detail Content:** ### Fluorescence Filter Cube: Fluorescence Filter Cube Holders ![Image: Fluorescence Filter Cube](https://www.optofilters.com/uploads/allimg/20250730/1-250I019455Q57.webp) The Fluorescence Filter Cube is a detachable filter cube designed to integrate excitation and emission filters—along with a dichroic mirror—for fluorescence microscopy. Compatible with major microscope brands, these holders enable precise control over light wavelengths, critical for imaging fluorescent probes and proteins. ### Key Features Extremely sharp wavelength cut-ons for accurate spectral separation High transmittance (90–97%) for excitation and emission filters, maximizing signal intensity Enhanced fluorescence collection efficiency, reducing excitation intensity requirements and minimizing sample photobleaching Available in longpass (for single-stained samples) and bandpass (for multi-stained sample separation) configurations ### Compatibility with Major Microscope Brands FL CUBE holders are engineered to fit standard filter sizes. Below is the compatibility guide for Olympus, Nikon, Leica, Zeiss, and other leading brands. Note: Confirm filter dimensions before purchase. OPTOStokes offers compatible filters with equivalent performance to OEM versions at a more competitive price. ![Image: Filter Cube Models & Compatible Microscopes](https://www.optofilters.com/uploads/allimg/20250730/1-250I019440D04.webp) ### Filter Cube Models & Compatible Microscopes | Model | Microscope Brand | Compatible Microscopes | | | AMF | Aperio | ScanScope FL | | | LDMK | Leica | DM-2000, DM-2500, DM-3000, DM-4000, DM-5000, DM-5500, DM-6000, DMI3000 B, DMI4000 B, DMI6000 B | | | LDMP | Leica | DMi8 | | | NQF | Nikon | Diaphot series, E1000, E200, E400, E600, E800, L150A, ME600L, Optiphot, Some Labophot, TE 200, TE 300, TS100, TS100F | | | NTE | Nikon | Ci series, Eclipse Ti, Ni, 50i, 55i, 80i, 90i, TE 2000, Any using the Epi-fluor Illuminator | | | OFF | Olympus | BX3 Series (BX53, BX63), IX3 Series (IX53, IX73, IX83) | | | OFX | Olympus | U-M710I | | | OMF | Olympus | U-MF2 | | | ZHE | Zeiss | FL CUBE EC P&C (Push-and-Click) | | ### Technical Specifications | Model | Excitation Filter | Emission Filter | Dichroic Mirror | | | | Dia. (max thickness) | Dia. (max thickness) | Size (L×W, max thickness) | | | AMF | 25.0 mm (5.0 mm) | 25.0 mm (5.0 mm) | 25.2×35.6 mm (1.5 mm) | | | LDMK | 21.8 mm (5.0 mm) | 23.3 mm (5.0 mm) | 22.0×29.0 mm (1.1 mm) | | | LDMP | 25 mm (5.0 mm) | 25 mm (3.5 mm) | 25.2×35.6 mm (1.1 mm) | | | NQF | 25 mm (5.0 mm) | 25 mm (3.5 mm) | 25.2×35.6 mm (1.1 mm) | | | NTE | 25 mm (5.0 mm) | 25 mm (3.5 mm) | 25.2×35.6 mm (1.1 mm) | | | OFF | 25 mm (5.0 mm) | 25 mm (5.0 mm) | 25.2×35.6 mm (1.5 mm) | | | OFX | 32.0 mm (5.0 mm) | 32.0 mm (3.5 mm) | 32.0×44.0 mm (1.5 mm, corners cut) | | | OMF | 25.0 mm (5.0 mm) | 25.0 mm (5.0 mm) | 25.2×35.6 mm (1.5 mm) | | | ZHE | 25.0 mm (5.0 mm) | 25.0 mm (5.0 mm) | 25.2×35.6 mm (1.1 mm) | | All cubes are available individually or as complete sets with matching filters. ![Image: OPTOStokes delivers. Our cubes match OEM specifications for Olympus, Nikon, Leica, and Zeiss—ensuring seamless integration with your microscope.](https://www.optofilters.com/uploads/allimg/20250707/1-250FG95JV38.webp) ### Find Your Perfect Filter Cube Solution Whether you need a stock filter cube for immediate replacement or a custom configuration for specialized imaging (e.g., multi-color fluorescence assays), OPTOStokes delivers. Our cubes match OEM specifications for Olympus, Nikon, Leica, and Zeiss—ensuring seamless integration with your microscope. Unsure about compatibility? Share your microscope model and application details with our team at sales@optofilters.com or leave a message on our website. We’ll help you select the right cube (or complete filter set) with fast delivery and competitive pricing. --- ## Soft vs. Hard Coating Filters: Differences & Synergy **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/138.html **Summary**: Learn the key differences between soft and hard coating filters, their synergies in optical systems, and applications. Expert insights for precise filter selection. > **Detail Content:** ![Image: Soft vs. Hard Coating Filters: Differences & Synergy](https://www.optofilters.com/uploads/allimg/20250723/1-250H3201A4129.webp) In precision optical systems, filters achieve precise control over light wavelengths. This functionality relies on two key thin-film technologies: soft coatings and hard coatings. These complementary technologies work together to shape the final performance and form of optical filters. ### What Are the Differences and Characteristics Between Soft and Hard Coating Filters? ### I. Soft Coating Filters: A Precise, Flexible Choice Soft coating filters are thin films deposited via physical vapor deposition (e.g., thermal evaporation), typically without ion assistance or with low auxiliary energy. Their film structure is relatively loose, with columnar or fibrous microstructures, and a Mohs hardness generally below 5 (easily scratched by nails), resulting in lower environmental resistance. Common materials for soft coatings include magnesium fluoride (MgF₂), silicon dioxide (SiO₂), and zinc sulfide (ZnS). MgF₂ is a classic choice for its excellent anti-reflective properties and low absorption. The deposition process involves evaporating materials in a vacuum chamber via resistance heating or electron beam bombardment, with vapor condensing on the substrate. The process temperature is relatively low. ### Impact on Filter Performance Advantages: Low internal stress, reducing substrate deformation risk Simpler process with lower costs Easier to achieve ultra-thick film layers Better compatibility with special materials (e.g., organic substrates) Disadvantages: Loose, porous structure leads to low mechanical strength (easily scratched/worn) Poor environmental stability (absorbs moisture/contaminants, causing wavelength shifts and increased scattering) Lower adhesion compared to hard coatings Difficult to precisely control density and optical constants of high-refractive-index materials Manufacturing standards for soft coatings focus on precise spectral performance (central wavelength, bandwidth, cutoff depth, transmittance), with lower requirements for film hardness and environmental durability (suitable for controlled environments). Controlling film thickness uniformity is a key challenge. ### II. Hard Coating Filters: The Foundation of Durability Hard coatings (Mohs hardness > 7) are deposited via high-energy processes like ion beam assisted deposition (IAD) or sputtering (magnetron sputtering, ion beam sputtering). Their structure is dense, close to bulk materials, with amorphous or fine-grained microstructures. Core materials include titanium dioxide (TiO₂), tantalum pentoxide (Ta₂O₅), hafnium dioxide (HfO₂), aluminum oxide (Al₂O₃), and silicon dioxide (SiO₂). These coatings offer water resistance, moisture resistance, high-temperature tolerance (>300°C without failure), and scratch resistance (no marks from steel wool). Combinations of high-refractive-index materials (e.g., Ta₂O₅, TiO₂) and low-refractive-index materials (SiO₂) form the basis of high-performance interference filters. ### Processing Techniques and Standards IAD bombards the growing film with an ion beam during evaporation; sputtering uses plasma to bombard a target, ejecting atoms that deposit on the substrate. These high-energy processes result in high particle kinetic energy. ### Impact on Filter Performance Advantages: Extremely dense and hard film layers, with high mechanical strength (wear and wipe resistance) Excellent environmental stability (no moisture absorption, long-term spectral stability) Strong adhesion Stable, precisely controllable optical constants (n, k) Achieves steeper cutoff edges and lower scattering loss Disadvantages: High internal stress (especially compressive stress), which may cause substrate bending—challenging for thin or complex-shaped substrates Complex processes, expensive equipment, and higher costs Relatively slow deposition rates Ultra-thick films are time-consuming to deposit, with more significant stress accumulation Manufacturing standards are stringent: in addition to high-precision spectral performance, key indicators include film hardness (often requiring pencil hardness ≥5H), adhesion (cross-cut tape test), environmental durability (high-temperature/humidity tests, salt spray tests, wipe tests), and stress control (substrate deformation). ### III. Synergistic Design: The Art of Combining Soft and Hard Coatings Soft and hard coatings are not substitutes but work synergistically in filter structures based on performance needs and process challenges: ### 1. Stress Management In hard coating multilayers, specially designed soft coating layers act as stress buffers. For example, in SiO₂/Ta₂O₅ stacks, using looser SiO₂ (close to soft coating properties) can partially offset the high compressive stress of Ta₂O₅, reducing total substrate deformation. For ultra-narrowband filters or applications requiring extreme flatness, precise stress compensation (soft-hard combinations) is critical. ### 2. Performance Optimization Broadband anti-reflective (BBAR) coatings: The outermost layer often uses hard materials (e.g., SiO₂ or Al₂O₃) as a wear-resistant, anti-fouling "protective cap" to shield underlying softer layers that achieve broadband anti-reflective functionality. Internal layers may include soft coating materials for specific refractive index matching. Special spectral requirements: Materials like ZnS or Ge exhibit unique optical properties (e.g., mid-to-far infrared characteristics) under soft coating processes, serving as functional layers in hard coating structures. Hard coating processes ensure overall structural stability and durability. ### 3. Process Feasibility For ultra-thick film requirements (e.g., filters for laser damage threshold testing), pure hard coating deposition is too time-consuming with excessive stress accumulation. Instead, soft coating processes can deposit the main thick layer, with a hard protective layer added to improve surface durability. For coating complex curved substrates, hard coatings' high stress may cause cracking or delamination—making soft coatings or soft-hard combinations more feasible. ### 4. Cost and Efficiency Non-critical or inner layers can use lower-cost soft coating processes when performance allows, while critical surface and protective layers require hard coatings. ### IV. Practical Applications: Each Shining in Its Sphere ### Soft Coating Filter Scenarios Laboratory and scientific instruments: Spectrometers and spectrophotometers in controlled environments, where cost sensitivity is high, and mechanical/environmental stability is less critical, but special spectral performance (e.g., specific materials, ultra-thick layers) is needed. Disposable or low-lifespan devices. Applications sensitive to substrate deformation (e.g., ultra-thin substrates, interferometer plates). ### Hard Coating Filter Scenarios Harsh industrial environments: Machine vision inspection (automotive manufacturing) and industrial laser processing heads (resistant to dust, wipes, and coolants). Long-term outdoor use: Aerospace remote sensing and security cameras (resistant to temperature extremes, humidity, salt spray, and UV radiation). Medical diagnostic equipment: Biochemical analyzers and endoscopes (requiring strict disinfection, high reliability, and stability). High-end consumer electronics: Smartphone camera modules (miniaturized, scratch-resistant). High-power laser systems: Laser resonator mirrors and harmonic separation mirrors (requiring ultra-high laser damage thresholds, low absorption loss, and excellent thermal stability). Defense and military: Night vision devices and missile guidance systems (extreme environment adaptability and high reliability are critical). ### V. Conclusion: Complementary Roles in Optical Systems Soft and hard coating filters are like adagios and fortissimos in a precision optical symphony. Soft coatings, with low stress and cost advantages, enable more complex optical designs; hard coatings, with superior durability and stability, form the foundation of reliable operation in harsh environments. Their synergy—through precise stress engineering, performance, and process complementarity—is key to high-performance, reliable filters. Advancements in ion source technology, plasma technology, optical monitoring, and materials science are blurring the lines between soft and hard coatings, with hybrid deposition and gradient layer designs emerging. Future trends will focus on leveraging their synergy to balance extreme optical performance, environmental robustness, processing efficiency, and cost—meeting demands from quantum research to deep space exploration. At OPTOStokes, we offer a wide range of off-the-shelf optical filters with both soft and hard coatings, and can customize solutions to your specific needs. Our products meet international quality and technical standards, supported by a well-established production line ensuring controllable lead times and consistent quality. For advice or custom inquiries, please email us at sales@optofilters.com or leave a message on our website—our team is ready to assist. --- ## Optical Coatings: Principles, Techniques & Advanced Applications **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/114.html **Summary**: Learn the science behind optical coatings—principles of interference, deposition techniques (e.g., sol-gel, e-beam evaporation), and applications in lasers, displays, and aerospace. OPTOStokes offers custom solutions with high LIDT and fast turnaround. > **Detail Content:** ### Fundamentals of Optical Coatings ![Image: Understanding Interference, Deposition Methods, and Real-World Uses](https://www.optofilters.com/uploads/allimg/20250715/1-250G51G446220.webp) Optical coatings are thin-film structures deposited onto substrates (glass, plastic, or metal) to manipulate light behavior through interference. By precisely controlling layer thickness and refractive indices, these coatings can enhance reflection, transmission, or polarization—critical for applications ranging from consumer electronics to high-power lasers. ### Core Principle: Light Interference When light encounters a coated surface, part reflects off the top layer while the rest transmits. The phase difference between these two beams determines interference outcomes: Constructive interference (in-phase) amplifies light intensity, used in high-reflectivity mirrors. Destructive interference (out-of-phase) reduces reflection, achieved in anti-reflection (AR) coatings with R < 0.5%. The formula governing this is:    \[ \Delta \phi = \frac{4\pi n d \cos\theta}{\lambda} \pm \pi \]   where \(n\) = refractive index, \(d\) = layer thickness, \(\theta\) = angle of incidence, and \(\lambda\) = wavelength. ### Key Deposition Techniques Modern optical coatings rely on advanced thin-film deposition methods: ### 1. Vacuum Sputtering Ionized gas bombards target materials, ejecting atoms to coat substrates. Ideal for precision AR coatings on camera lenses, achieving broadband transmission (400–700 nm) with99.9% reflectivity at 1064 nm. ### 3. Sol-Gel Deposition Liquid precursors undergo hydrolysis to form nanoparticle sols, which coat substrates via dip-coating. This method produces crack-free, high-durability films with laser-induced damage thresholds (LIDT) exceeding 14.58 J/cm² at 1064 nm. ### Advanced Applications Optical coatings address critical challenges across industries: ### 1. Laser Systems Polarizing beam splitters (PBS) for 532 nm lasers require LIDT >5 J/cm² to withstand high-energy pulses. Multilayer designs with alternating HfO₂/SiO₂ layers achieve >99% polarization extinction ratio. ### 2. Display Technology High-definition HUDs use dichroic coatings to reflect critical flight data while transmitting ambient light. These coatings feature ### 3. Medical Devices ### Performance Challenges & Solutions - **Laser Damage Resistance**: Coatings for 1064 nm lasers must balance high reflectivity (R >99.9%) with LIDT >10 J/cm². OPTOStokes’ proprietary ion-assisted deposition (IAD) reduces defect density by 80%.   - **Temperature Stability**: Aerospace applications demand coatings stable up to 500°C. Alumina-based films with graded refractive indices maintain --- ## Refractive Index, k, T, R: Key Parameters of Optical Thin Films **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/113.html **Summary**: Learn about optical thin film parameters: refractive index (n), extinction coefficient (k), transmittance (T), reflectance (R). Explore their relationships and applications with OPTOStokes. > **Detail Content:** ### What Are Extinction Coefficient, Transmittance, and Reflectance in Thin Films? ![Image: Definitions, Relationships & Applications](https://www.optofilters.com/uploads/allimg/20250715/1-250G51A153536.webp) Optical thin films rely on key parameters to define their performance. Understanding refractive index (n), extinction coefficient (k), transmittance (T), and reflectance (R) is critical for designing functional optical components—from anti-reflection coatings to laser mirrors. ### Refractive Index (n) Refractive index describes the ratio of light speed in a vacuum to its speed in a material: n = c/v, where c is the speed of light in a vacuum and v is the speed in the material. Physically, it determines the refraction angle at an interface (Snell’s Law): n₁sinθ₁ = n₂sinθ₂. Multilayer thin film designs rely on combining layers with different refractive indices to achieve anti-reflection, high reflectivity, or filtering functions. ### Extinction Coefficient (k) The extinction coefficient quantifies light attenuation as it propagates through a material, linked to absorption. It is part of the complex refractive index: ñ = n + ik. The physical significance lies in the attenuation law of light intensity: I(z) = I₀e⁻⁴πkz/λ, where z is the propagation distance and λ is the wavelength. A k > 0 indicates light absorption by the material, such as semiconductors absorbing specific wavelengths. ### Transmittance (T) Transmittance is the ratio of transmitted light intensity (It) to incident light intensity (I₀): T = It/I₀. It is influenced by film thickness, n/k distributions, and interface reflection losses (e.g., anti-reflection coatings minimize T loss from reflection). ### Reflectance (R) Reflectance is the ratio of reflected light intensity (Ir) to incident light intensity (I₀): R = Ir/I₀. For a single interface, the Fresnel equation gives R = {(n₂ - n₁)/(n₂ + n₁)}², where n₁ and n₂ are the refractive indices of adjacent media. ### Synergies Between Parameters ### n and k: Balancing Performance Take indium tin oxide (ITO) films—used in transparent conductors—for example. High conductivity (low resistance) requires high carrier concentration, but carriers cause near-infrared absorption (increasing k). The design challenge: maintain low k (k ≈ 0) in the visible range while allowing moderate absorption in the infrared. ### T and R: Complementary Properties In ideal lossless films: T + R + A = 1, where吸收率 A (absorptance) is determined by k. Anti-reflection (AR) coatings use destructive interference in multilayers to minimize R (R → 0), thereby increasing T (e.g., camera lenses with R < 0.5%). High-reflectivity films use periodic high-low n layers (e.g., TiO₂/SiO₂) to achieve R > 99% at specific wavelengths. ### Key Performance Relationships & Examples Transparent Conducting Oxides (TCOs) like ZnO:Al require visible T > 80% → low k values ( --- ## Thin-Film Optical Filters: Types, Specs & Custom Solutions **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/112.html **Summary**: Learn about thin-film optical filters: types (bandpass, dichroic), specs, and custom solutions. OPTOStokes offers stock & custom filters for microscopy, spectroscopy, and more. > **Detail Content:** ### What Exactly Is a Thin-Film Optical Filter? ![Image: Thin-Film Optical Filter](https://www.optofilters.com/uploads/allimg/20250715/1-250G5154042Y3.webp) Thin-film optical filters are precision devices created by alternately depositing dielectric layers of different refractive indices onto optical-grade substrates—most commonly fused silica or B270 glass. As light enters the layer stack, constructive and destructive interference within each nanometer-scale layer steers individual wavelengths toward transmission, reflection, or absorption. By tailoring layer count, thickness, and material composition, engineers can sculpt virtually any spectral profile across 200 nm to 2500 nm, making these filters critical in precision optical systems. ### Five Key Types of Optical Filters ### 1. Bandpass Filters Transmit a defined wavelength window while rejecting adjacent light. Modern specifications focus on passband range, transmission level, and required blocking range (replacing legacy metrics like half-power bandwidth/HPBW). Performance is optimized for 0° angle of incidence (AOI); tilting or using high-cone angles shifts the passband and introduces polarization splitting. "Squareness" of the spectral curve is controlled by cavity count (Fabry-Perot designs) or longpass/shortpass (LWP/SWP) layer pairs. Ideal for fluorescence microscopy and laser spectroscopy. ### 2. Short-Pass Edge Filters Transmit shorter wavelengths while blocking longer ones, enabling clean separation of low-wavelength light in systems like UV imaging setups. ### 3. Long-Pass Edge Filters Block shorter wavelengths and transmit longer ones, commonly used in infrared spectroscopy and excitation/emission path isolation in fluorescence systems. ### 4. Dichroic Filters Operate at 45° AOI (standard mounting angle), reflecting one wavelength band while transmitting another. The spectral gap between bands directly impacts coating complexity and cost—tighter gaps require thicker coatings and stricter tolerances. Performance improves with narrower beam angles and better collimation. Used for beam combining in microscopy and display systems. ### 5. Notch Filters Reject a single narrow wavelength band while transmitting all other light, making them ideal for laser cleanup (e.g., removing excitation lines in Raman spectroscopy). ### Key Specification Tips for Optimal Performance Start by mapping your light source and detector response curves—specifying blocking/transmission outside these ranges adds unnecessary cost. Use average optical density (OD) levels unless isolating discrete laser lines; note that thin-film OD spikes are spectrally narrow and rarely affect signal-to-noise ratio. AOI matters: keep bandpass, notch, and edge filters at low angles (0° preferred), while dichroics are optimized for 45° AOI. Tighter beam cone angles improve performance across all types. ### Beyond Standard: Multi-Band & Custom Filters While standard filters cover most needs, OEM systems often require multi-band, multi-notch, or solar-simulating profiles. Multi-band filters integrate multiple passbands into one substrate, reducing instrument size; multi-notch/dichroic coatings do the same for blocking or beam-combining tasks. OPTOStokes offers hundreds of off-the-shelf filters for immediate shipment and can engineer custom spectra—matching any wavelength requirement with precision dielectric layering, often within three weeks. ### Optimize Your Optical Path Today From fluorescence microscopes and Raman spectrometers to telecom modules and solar-imaging payloads, precise spectral control is critical. Whether you need a stock bandpass filter overnight or a custom multi-band solution with tight AOI tolerances, send your wavelength list and mechanical specs to sales@optofilters.com. Our coating engineers will return a detailed drawing and quote within 24 hours—no minimum order quantity, no hidden tooling fees. --- ## Future of Fluorescence Filters: Deep Cutoff & Steeper Edges **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/111.html **Summary**: Future fluorescence filters demand OD7+ cutoff & steeper edges. OPTOStokes delivers high-precision solutions to boost SNR in detection systems. > **Detail Content:** ![Image: fluorescence filters](https://www.optofilters.com/uploads/allimg/20250709/1-250F9110024226.webp) ### Advancing SNR in Detection Instruments To enhance the performance of fluorescence detection instruments, there’s a growing focus on optimizing optical filters to boost signal-to-noise ratio (SNR). This drives two key trends in filter development: deeper cutoff depths and steeper transition edges—both critical for isolating fluorescence signals from excitation light. ### 1. Deeper Cutoff: Beyond OD6 for High-Power Systems Deeper cutoff depth ensures better isolation between fluorescence and excitation light, directly improving SNR. For instruments using high-power lasers as excitation sources, the standard OD6 cutoff is no longer sufficient; demands are shifting to OD7, OD8, or higher. Why it matters: Higher laser power increases stray light interference. A filter with OD8 cutoff blocks 99.999999% of excitation light, preventing it from swamping faint fluorescence signals—essential for applications like single-molecule imaging or high-throughput screening. ### 2. Steeper Edges: Maximizing Signal in Tight Spectral Windows Steeper transition edges (faster shift from transmission to cutoff) allow wider passbands while maintaining effective isolation. This means more excitation energy reaches the sample, and more fluorescence signal is collected—key for systems using small Stokes shift fluorophores (where excitation and emission spectra overlap closely). For example, a filter with a 1nm transition edge can retain 20% more fluorescence signal compared to a 3nm edge in small Stokes shift scenarios, significantly提升 SNR without compromising isolation. ### Challenges in Manufacturing & Detection Advancing cutoff depth and steepness raises both manufacturing and testing challenges: Manufacturing: Achieving OD7+ cutoff requires precise control of multi-layer dielectric stacks (50+ layers), with minimal defects to avoid light leakage. Steeper edges demand nanometer-level control over layer thickness. Detection: Current standards in China measure up to OD6-7 with 3-4nm resolution for steepness. Internationally, leading labs achieve OD9+ accuracy and --- ## ​Raman Filters: Truth About Cost vs. Performance **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/110.html **Summary**: Discover truth about Raman filter tradeoffs. OPTOStokes delivers stock/custom notch & dichroic filters with OD5-OD7 blocking. Solve cost vs performance dilemma for anti-Stokes & low-frequency detection. > **Detail Content:** ![Image: Raman Filters](https://www.optofilters.com/uploads/allimg/20250709/1-250F9105232K4.webp) ### Beyond the Dichroic vs. Notch Filter Debate The industry conversation often centers on cost-driven compromises—replacing notch filters with dichroic mirrors, trading performance for affordability. But the reality is more nuanced. At OPTOStokes, we engineer solutions that transcend this false dichotomy. ### Notch Filters: Precision at a Premium Notch filters remain the gold standard for maximum flexibility. Using 50+ alternating dielectric layers deposited via ion beam sputtering (IBS), they achieve: OD6+ blocking at exact laser lines (e.g., 785nm ±0.5nm) 90% transmission starting 15cm⁻¹ above laser line Mechanical durability resistant to thermal shift The Tradeoff: Broader transition bands (~15-20nm) may obscure anti-Stokes signals—a non-issue for 95% of industrial Raman applications. ### OPTOStokes' TriPath Solution Your application dictates the optimal path: | Solution | Best For | Tech Specs | Lead Time | | | Stock Dichroics | Material ID, QC Systems | OD5-6, 810nm LP | 24hrs | | | Hybrid Filters | Pharma, Semiconductors | OD6, 10nm transition | 2-3 weeks | | | Custom Notch | anti-Stokes, Low-frequency Raman | OD7+, --- ## 785nm Raman Laser: Why It’s the Top Choice for Spectroscopy **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/109.html **Summary**: Discover why 785nm laser is the optimal choice for Raman spectroscopy. Learn how it suppresses fluorescence, offers balanced penetration, & works with key optical components like filters for high-quality spectra. > **Detail Content:** ![Image: why 785nm for Raman](https://www.optofilters.com/uploads/allimg/20250709/1-250F9103233T5.webp) ### Why Choosing the Right Laser Wavelength Matters in Raman Spectroscopy For researchers new to Raman spectroscopy, the most common question is: "What laser excitation wavelength do I need?" The answer hinges on the sample itself—its Raman scattering cross-section, optical properties, and potential for interference like photoluminescence. Raman lasers span wavelengths from ultraviolet (UV) to visible and near-infrared (NIR).  Selecting the optimal wavelength isn’t always obvious; it depends on variables tied to the laser’s λ, making 785nm a standout choice for many applications. ### Key Reasons 785nm Excels in Raman Spectroscopy ### 1. Balancing Raman Signal Strength Raman signals are inherently weak, arising from photon-phonon interactions. Since Raman scattering intensity is inversely proportional to the fourth power of the excitation wavelength (λ⁴), longer wavelengths like 785nm produce weaker signals than shorter ones (e.g., 532nm).  However, this tradeoff is often justified by 785nm’s ability to minimize stronger, confounding interference—like fluorescence. ### 2. Reducing Fluorescence Interference Many samples (biological tissues, polymers, dyes) emit strong fluorescence under shorter UV/visible wavelengths, where higher photon energy readily excites electronic transitions.   The lower photon energy of 785nm NIR light excites far fewer fluorophores, significantly reducing fluorescence background and allowing faint Raman peaks to be clearly resolved—critical for accurate spectral analysis. ### 3. Optimizing Sample Penetration & Compatibility - Transparent samples: For thin, transparent materials, 785nm’s penetration depth (determined by lens NA, sample refractive index) avoids overwhelming substrate signals (e.g., glass, thin films). - Opaque/complex samples: In opaque materials (semiconductors, powders), 785nm’s longer wavelength penetrates deeper than visible lasers, enabling depth profiling.  Its penetration range aligns with manufacturing depths of microelectronics, making it ideal for semiconductor analysis. ### 4. Versatility Across Sample Types From biological samples (minimizing photodamage) to industrial materials (polymers, composites), 785nm works across diverse substrates.  This versatility reduces the need for multiple lasers, simplifying experimental setups. ### OPTOStokes: Enhancing Your 785nm Raman Performance To maximize the benefits of 785nm excitation, high-precision optical filters are essential—efficiently blocking the intense laser line and unwanted background light while transmitting the crucial Raman shift range. OPTOStokes delivers reliable solutions:  - Stock Filters: Immediately available, pre-calibrated for standard 785nm Raman configurations. Fast integration, assured quality.  - Custom Designs: Engineered to address your unique challenges—suppressing specific fluorescence bands, optimizing spectral edge transitions, or meeting tight size constraints.   Need the right optical filters to elevate your 785nm Raman results?  Email sales@optofilters.com with your sample type and system specs—our application experts will provide tailored recommendations within 24 hours.  Or visit our site to explore our range of in-stock 785nm-optimized filters. OPTOStokes: Precision Filters Engineered for Reliable Raman Data. --- ## How to Customize Optical Filters for Precision Optics **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/108.html **Summary**: Learn how to customize optical filters for precision optics with OPTOStokes. Tailored solutions for UV, VIS, NIR applications. > **Detail Content:** ![Image: precision optics](https://www.optofilters.com/uploads/allimg/20250708/1-250FQ63H1555.webp) ### Why Choose Custom Optical Filters? Custom optical filters are vital components in optical systems, designed to meet specific wavelength, transmission, and durability needs. Unlike off-the-shelf options, custom filters offer tailored solutions for applications like high-resolution microscopy, spectroscopy, and laser systems. OPTOStokes provides a wide range of stock filters and expert customization, ensuring top performance for UV, VIS, NIR, and IR applications. ### Steps to Customize Your Optical Filter Follow these steps to create a filter that perfectly fits your needs: Define Your Requirements Start by identifying key parameters: wavelength range, bandwidth, cut-off range, transmission rate, reflectivity, size, surface shape, and finish. For precision tasks—like isolating UV light below 370nm—these details ensure your filter aligns with system goals. Design Optimization Use optical design software to fine-tune parameters such as center wavelength, bandwidth, and cut-off depth. A well-designed filter boosts efficiency, whether you’re enhancing contrast in imaging or sharpening spectral analysis. Select Materials and Coatings Pick materials and coatings that maximize transmission (e.g., >90%) and minimize reflection. This step is critical for achieving high optical performance, especially in demanding environments like fluorescence imaging. Manufacturing and Testing Production involves advanced processes—optical coating, cutting, and polishing—followed by rigorous testing. At OPTOStokes, every filter undergoes performance checks to match your exact specifications. ### Key Considerations for Customization Choose a Reliable Supplier: Partner with an experienced provider like OPTOStokes, offering both stock and custom options with proven quality. Focus on Quality Control: Ensure durability and precision with testing tools like the Lambda900 spectrometer, standard at OPTOStokes. Balance Cost and Time: Customization can vary in complexity, so plan with a supplier who controls lead times effectively. ### Comparing Filter Types Short-Pass Filters: Transmit light below a cut-off (e.g., 640nm), ideal for capturing fluorescence emissions. Bandpass Filters: Allow a specific wavelength range (e.g., 510-520nm), great for spectroscopy. Customizing ensures your filter type matches your application perfectly. ### Real-World Applications High-Resolution Microscopy: A custom short-pass filter at 370nm enhances image clarity by isolating UV excitation light. Spectroscopy: A bandpass filter targeting 510nm resolves fine spectral details, improving analytical accuracy. Laser Systems: Durable coatings on custom filters maintain performance under intense light conditions. ### Why OPTOStokes Stands Out OPTOStokes delivers precision optical filters with a vast inventory for immediate selection and advanced customization for unique needs. Our production lines meet international standards, offering controlled lead times and reliable quality. Whether you need a stock filter today or a custom solution tomorrow, we’ve got you covered. ### Ready to Optimize Your Optics? Custom optical filters unlock superior performance for your specific application. Need help choosing the right wavelength or coating? Contact sales@optofilters.com for expert guidance or visit www.optofilters.com to explore our offerings and request a quote. Let OPTOStokes elevate your optical system today! --- ## Custom Optical Filters: Precision Solutions **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/107.html **Summary**: Discover custom optical filters’ benefits for precision optics. OPTOStokes offers tailored bandpass, laser, and more > **Detail Content:** ![Image: Custom Optical Filters](https://www.optofilters.com/uploads/allimg/20250708/1-250FQ61149227.webp) ### Why Choose Custom Optical Filters? Custom optical filters are game-changers for precision optics, offering tailored performance that off-the-shelf options can’t match. Here’s why they stand out: Streamlined Design: In laser systems, custom filters reduce the number of components, cutting complexity and costs. Superior Signal Quality: Optimized signal-to-noise ratios boost efficiency, critical for high-resolution imaging in microscopy or spectroscopy. Perfect Fit: Tailored wavelengths, sizes, and coatings ensure seamless integration into your unique setup. ### Types of Customizable Filters OPTOStokes offers a wide range of custom optical filters, each designed to meet specific application needs. The table below outlines key types and their customizable parameters: | Filter Type | Function | Applications | Custom Parameters | | | Bandpass Filters | Pass specific wavelength range, block others | Fluorescence microscopy, astronomy | Center wavelength, bandwidth, coatings, OD5+ | | | Long-Pass Filters | Pass wavelengths above cutoff, block shorter ones | NIR spectroscopy, UV blocking | Cutoff wavelength, slope, substrate material | | | Short-Pass Filters | Pass wavelengths below cutoff, block longer ones | UV imaging, laser systems | Cutoff wavelength, OD5+, transmission rate | | | Neutral Density (ND) | Reduce light intensity evenly | Photography, laser power control | Optical density (e.g., 0.3ND), size, material | | | UV/IR Cut Filters | Block UV/IR, pass visible light | Machine vision, photography | UV/IR cutoff, transmission range, thickness | | | Polarization Filters | Transmit specific polarization direction | Glare reduction, display enhancement | Polarization type, axis, transmission rate | | | Dual/Multi-Band Filters | Pass multiple wavelength bands | Multi-spectral imaging, flow cytometry | Band count, wavelength ranges, isolation | | | Laser Filters | Pass specific laser wavelengths | LIDAR, laser communication | Center wavelength, damage threshold, size | | | Interference Filters | Select wavelengths via thin-film interference | Spectroscopy, remote sensing | Bandwidth, coating layers, substrate flatness | | ### Bandpass Filters Perfect for isolating specific wavelengths, like 520 nm for GFP imaging. Customize center wavelength, bandwidth (e.g., 20 nm), and coatings (e.g., TiO₂/SiO₂) for high transmission (>90%) and deep blocking (OD6+). ### Long-Pass and Short-Pass Filters Long-pass filters, ideal for NIR spectroscopy, can be tuned to cutoffs like 600 nm. Short-pass filters, used in UV imaging, support cutoffs like 450 nm with high OD for IR blocking. Both offer custom substrates and slopes. ### Specialty Filters Neutral density filters control light intensity for laser experiments, while UV/IR cut filters enhance color accuracy in photography. Polarization filters reduce glare in displays, and multi-band filters enable simultaneous detection in flow cytometry. ### Laser and Interference Filters Laser filters match wavelengths like 532 nm for LIDAR, with high damage thresholds. Interference filters, used in Raman spectroscopy, allow precise bandwidth control with custom coating layers. ### Why OPTOStokes? OPTOStokes delivers high-precision optical filters with unmatched flexibility: Stock Availability: Choose from a vast range of in-stock filters for quick delivery. Custom Expertise: Our engineers design filters to your exact specs, from wavelength to mounting. Reliable Quality: Built to global standards with advanced production, ensuring consistent performance and on-time delivery. Need a filter tailored to your system? Email sales@optofilters.com or visit www.optofilters.com to discuss your requirements and get a quote within 24 hours. --- ## Cy5 Alternatives & Photobleaching Prevention for Imaging **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/106.html **Summary**: Explore Cy5 alternatives (Alexa Fluor 647, APC) & photobleaching tips. OPTOStokes offers stock/custom filters for seamless imaging performance > **Detail Content:** | Fluorescence Dye | Excitation filter (nm) | Emission filter (nm) | Dichroic mirror (nm) | | | Atto 425 | BP430/24 | BP480/30 | DM450 | | | BP430/24 | BP480/20 | DM450 | | | FAM | BP470/30 | BP520/20 | DM505 | | | BP470/30 | BP525/20 | DM505 | | | BP480/20 | BP520/20 | DM505 | | | BP485/20 | BP525/20 | DM505 | | | HEX,VIC,JOE | BP520/20 | BP565/22 | DM550 | | | BP525/20 | BP565/22 | DM550 | | | BP530/20 | BP565/22 | DM550 | | | BP530/20 | BP570/20 | DM550 | | | CY3,TAMRA | BP543/20 | BP580/20 | DM565 | | | BP543/20 | BP585/20 | DM565 | | | ROX | BP565/22 | BP615/40 | DM590 | | | BP570/20 | BP612/20 | DM590 | | | BP580/20 | BP620/20 | DM600 | | | BP585/20 | BP620/20 | DM600 | | | Atto 633 | BP620/20 | BP655/20 | DM635 | | | CY5 | BP624/40 | BP694/40 | DM647 | | | BP624/40 | BP675/20 | DM647 | | | BP630/20 | BP675/20 | DM647 | | | BP630/20 | BP680/20 | DM647 | | | CY5.5 | BP675/20 | BP725/30 | DM700 | | | BP665/22 | BP725/40 | DM700 | | | CY7 | BP715/70 | BP800/60 | DM770 | | | BP725/30 | BP800/30 | DM770 | | | BP725/40 | BP800/30 | DM770 | | ### 1. Top Cy5 Alternatives in Fluorescence Imaging Cy5 is widely used in far-red fluorescence imaging, but researchers often seek alternatives for specific needs. Two leading options stand out:   - Alexa Fluor 647: Matches Cy5’s spectral profile with excitation ~650nm and emission ~668nm, offering superior photostability—ideal for long-term live-cell imaging.   - Allophycocyanin (APC): A phycobiliprotein with excitation ~650nm and emission ~660nm, prized for high brightness in flow cytometry.   Both alternatives share Cy5’s compatibility with red-channel imaging systems, making them drop-in replacements with minimal setup adjustments. ### 2. OPTOStokes Filters for Cy5 Substitutes To maximize performance with these alternatives, filter sets must align with their spectral peaks. OPTOStokes provides:   - Stock Filter Sets: Pre-calibrated for Alexa Fluor 647 (excitation 650/20nm, emission 670/20nm) and APC (excitation 650/15nm, emission 660/20nm).   - Custom Solutions: Tailored bandwidths or dichroic mirrors (e.g., DM655nm) for unique imaging systems, ensuring zero crosstalk.   All filters maintain >90% transmission in passbands, reducing exposure time—critical for photostability. ### 3. How to Prevent Photobleaching in Cy5 & Alternatives Photobleaching (fluorescence loss from light exposure) undermines data reliability. Key strategies:   - Minimize Exposure: Use high-transmission filters (like OPTOStokes’ >90% models) to reduce laser power/imaging time.   - Anti-Fading Agents: Pair with reagents (e.g., DABCO) to slow dye degradation—compatible with all Cy5 substitutes.   - Filter Quality: Choose filters with tight blocking (OD6+ in off-bands) to avoid stray light accelerating bleaching.    - Regular Checks: Inspect filter surfaces for degradation; replace with OPTOStokes’ durable coatings (scratch-resistant) when needed. ### 4. Get Started with OPTOStokes Need help with Cy5 alternatives or photobleaching?     - Email sales@optofilters.com for:    - Free spectral compatibility checks for your imaging system    - Custom filter designs for Alexa Fluor 647/APC    - Visit our site to:   - Browse in-stock Cy5 substitute filter sets   - Request a no-obligation quote   OPTOStokes: Precision filters for stable, high-quality fluorescence imaging—when you need them. --- ## Cy5 Filter Selection Guide for Fluorescence Imaging **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/105.html **Summary**: OPTOStokes’ guide to selecting Cy5 filters: 630/20nm excitation, 675/20nm emission, DM647nm. High SNR, compatible with imaging systems. In-stock & custom options. > **Detail Content:** ![Image: Cy5 Filter Selection](https://www.optofilters.com/uploads/allimg/20250708/1-250FQ35QW13.webp) ### FAQ: How to Choose the Right Filters for Cy5 Fluorophores? Selecting optimal filters for Cy5 fluorescence imaging requires matching the fluorophore’s spectral properties with precision. At OPTOStokes, our specialized Cy5 filter sets are engineered to enhance signal clarity, ensuring reliable results in microscopy, flow cytometry, and other imaging applications. ### Key Wavelength Parameters for Cy5 Filters Cy5 fluorophores have distinct excitation and emission profiles, requiring filter specifications tailored to these ranges: Excitation Filter: 630/20nm (centered at 630nm with 20nm bandwidth) – captures the peak excitation wavelength of Cy5. Emission Filter: 675/20nm (centered at 675nm with 20nm bandwidth) – isolates Cy5’s emission signal while blocking background noise. Dichroic Mirror: DM647nm – efficiently reflects excitation light and transmits emission light, minimizing crosstalk. ### Filter Types for Optimal Cy5 Performance To maximize imaging quality, consider the following filter types: Bandpass Filters: Ideal for isolating specific wavelength ranges (e.g., 630/20nm excitation), ensuring high signal-to-noise ratio (SNR). Dichroic Filters (Beam Splitters): Critical for separating excitation and emission light paths, preventing excitation light from reaching the detector. OPTOStokes’ Cy5 filter sets are designed to be compatible with most imaging systems, from confocal microscopes to high-throughput plate readers. ### Why Choose OPTOStokes for Cy5 Filters? Our Cy5 filters balance precision and practicality: Ready-to-Ship Options: Standard 630/20nm, 675/20nm, and DM647nm filters are in stock for immediate delivery. Custom Solutions: Need adjusted bandwidths (e.g., 635/15nm) or system-specific compatibility? Our team designs tailored filters to match your setup. Global Quality: All filters meet international standards for wavelength accuracy and durability, ensuring consistent performance across batches. ### Get Started with Your Cy5 Filter Set Not sure which Cy5 filter configuration fits your imaging system? Let our experts help: Email sales@optofilters.com for:    - Detailed spec sheets for 630/20nm excitation filters    - Custom filter design consultations Visit our website to:    - Browse in-stock Cy5 filter sets    - Request a quote within 24 hours OPTOStokes: Your partner for precise, reliable Cy5 fluorescence imaging filters. --- ## Cy5 Filter Selection Guide for Optimal Imaging **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/104.html **Summary**: Master Cy5 filter selection for fluorescence imaging. Get tips and specs for top results with OPTOStokes filters. > **Detail Content:** ![Image: CY5/Qusar670 channel](https://www.optofilters.com/uploads/allimg/20250708/1-250FQ35QW13.webp) ### Introduction to Cy5 Fluorophores Cy5 is a vibrant far-red fluorescent dye widely used in biological and medical research. It’s excited at 633 nm or 647 nm—perfect for common laser lines—and emits at a peak of 670 nm. One of its standout features? Low autofluorescence in biological samples. This makes Cy5 a go-to choice for fluorescence imaging, especially in applications like neuronal tracking and cellular imaging. ### Understanding Cy5’s Spectral Properties Cy5 boasts an excitation peak around 649 nm and an emission peak near 670 nm. These characteristics minimize background noise in biological samples, delivering sharper images and better contrast. Whether you’re working with fluorescence microscopy, flow cytometry, or other imaging techniques, Cy5’s properties make it a reliable performer. ### Choosing the Right Filters for Cy5 Picking the perfect filters for Cy5 is key to boosting signal-to-noise ratio and image quality. Here’s what you need in an ideal filter set: Excitation Filter: Centered around 630 nm to align with Cy5’s excitation peak. Emission Filter: Positioned near 675 nm  to capture the emitted fluorescence cleanly. Dichroic Mirror: Set at approximately 647 nm to effectively separate excitation and emission light. Matching your filters to Cy5’s spectral profile enhances detection efficiency, improving the accuracy and reproducibility of your experiments. ### Best Practices for Using Cy5 Filters To get the most out of Cy5 filters, stick to these practical tips: Filter Selection: Opt for a dedicated Cy5 filter set designed to match its 649 nm excitation and 670 nm emission peaks. Precision here is everything. Microscope Setup: Ensure your filters and dichroic mirrors are properly aligned. Misalignment can muddy your excitation-emission separation and degrade image quality. Sample Preparation: Follow established Cy5 labeling protocols for your probes or dyes. Good staining and mounting techniques amplify fluorescence output. Regular Calibration: Keep your microscope and filter set in top shape with routine calibration. This consistency cuts down on errors and keeps results reliable. Troubleshooting: Facing low signal or high background noise? Try tweaking probe concentration or exposure time. High-quality filters—like those from OPTOStokes—block stray wavelengths to keep noise low and signals strong. ### Applications of Cy5 in Research Researchers lean on Cy5 for its versatility. It shines in fluorescence microscopy for detailed cellular studies, powers flow cytometry for precise cell analysis, and excels in neuronal tracking thanks to its clarity in complex samples. The right filter set unlocks Cy5’s full potential across these fields. ### Why OPTOStokes for Cy5 Filters? Need top-tier filters? OPTOStokes delivers high-precision optical filters built for fluorescence imaging, including Cy5-specific sets. We offer a wide range of stock options and custom solutions tailored to your needs. Our products meet global quality standards, backed by a robust factory setup for reliable delivery and consistent performance. Got questions or need a custom filter? Drop us a line at sales@optofilters.com or visit www.optofilters.com to explore your options. --- ## How to Choose the Right Short-Pass Optical Filters **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/103.html **Summary**: Learn how to choose short-pass optical filters for precision applications like fluorescence microscopy. Discover key factors and best practices > **Detail Content:** ![Image: Short-Pass Optical Filters](https://www.optofilters.com/uploads/allimg/20250708/1-250FP94156291.webp) ### Introduction to Short-Pass Optical Filters Short-pass optical filters are essential components in applications requiring precise wavelength control, such as fluorescence microscopy, laser systems, and machine vision. These filters transmit light below a specific cut-off wavelength while blocking longer wavelengths, ensuring high-quality imaging and signal clarity. OPTOStokes offers high-precision optical filters designed for UV, VIS, NIR, IR, and fluorescence applications, with standard products in stock and custom solutions available. ### Key Factors for Selecting Short-Pass Filters Choosing the right short-pass filter involves evaluating several critical factors to match your application's needs: Cut-off Wavelength: Identify the wavelength range you need to block. For example, a 500nm short-pass filter transmits UV and visible light below 500nm while blocking longer wavelengths like red or NIR light. Transmission Rate: Opt for filters with high transmission (typically >90%) to maximize light throughput and enhance image brightness, crucial for applications like fluorescence imaging. Durability: Select filters with robust coatings to withstand harsh environments, such as high humidity or temperature fluctuations, ensuring long-term performance. ### Best Practices for Using Short-Pass Filters To achieve optimal performance, follow these guidelines when using short-pass optical filters: Ensure proper installation, aligning the filter with the optical path to match its specified wavelength range. Regularly inspect the filter for dust, scratches, or damage, as these can degrade imaging quality. Clean gently with optical-grade materials to maintain performance. Verify compatibility with your system's light source and detector to avoid wavelength mismatch. ### Short-Pass vs. Long-Pass Filters: What's the Difference? Understanding the distinction between short-pass and long-pass filters is key to selecting the right solution: Short-Pass Filters: These transmit light below the cut-off wavelength and block longer wavelengths. They are ideal for applications like UV imaging or laser systems where longer wavelengths (e.g., IR) need to be filtered out. Long-Pass Filters: These transmit light above the cut-off wavelength and block shorter wavelengths, making them suitable for applications like NIR spectroscopy where UV or visible light must be excluded. For instance, in fluorescence microscopy, a short-pass filter might be used to isolate excitation light, while a long-pass filter captures emitted fluorescence. ### Why Choose OPTOStokes for Your Optical Filters? OPTOStokes delivers high-precision optical filters and custom optical coatings tailored to your specific needs. With a wide range of standard short-pass and long-pass filters in stock, we also offer bespoke designs that meet international quality standards. Our advanced production lines ensure controlled lead times and consistent quality. For expert guidance or to request a custom solution, contact us at sales@optofilters.com or leave an inquiry at www.optofilters.com. --- ## OPTOStokes: Low Wavefront Distortion Filters for Gene Sequencers & Flow Cytometers **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/102.html **Summary**: OPTOStokes offers low wavefront distortion filters for gene sequencers & flow cytometers. Achieve ≤0.25λ precision—contact us for custom designs matching international standards. > **Detail Content:** ![Image: Schematic diagram of film stress](https://www.optofilters.com/uploads/allimg/20250707/1-250FG4355I07.jpg) Schematic diagram of film stress ### 1. Critical Wavefront Control in Precision Fluorescence Instruments Fluorescence systems impose strict wavefront demands:    - Gene sequencers require ultra-low distortion for DNA signal integrity.   - Flow cytometers depend on precise beam combining to differentiate cell populations.   Wavefront distortion—defined as the deviation from ideal wavefronts—directly impacts measurement accuracy, making advanced filter solutions non-negotiable.    ### 2. Understanding Wavefront Distortion Metrics - Transmitted Wavefront: Affects light propagation (e.g., sequencing signal clarity).    - Reflected Wavefront: Influences beam alignment (e.g., cytometer excitation sources).    Measured as "xλ@632.8 nm," with 0.1λ representing elite international standards.    ### 3. Dual Drivers of Wavefront Distortion  ### 3.1 Substrate Quality: The Foundation of Transmitted Wavefront - Uniform material and RA ≤1nm surface finish are critical.   - Global Benchmarks: Chinese mass-produced: ≤0.25λ@632.8 nm International elite: ≤0.1λ@632.8 nm (U.S. monopoly)  ### 3.2 Film Stress: The Reflective Wavefront Disruptor - Tensile/compressive stresses warp substrates, affecting reflection precision.    - OPTOStokes' Solutions: IAD ion-assisted deposition for stress balancing Dual-side stress-matched coating architecture Post-deposition annealing at 200°C for stress relief  ### 4. Market Landscape: From Commercial to Cutting-Edge - Mid-High End (China):   - Transmitted: ≤0.25λ, Reflected: 0.25–0.50λ@632.8 nm    - Suits 90% of fluorescence instruments.    - Elite Segment:  - ≤0.1λ required for next-gen sequencers, priced >$1,000/filter (U.S.-dominated). ### 5. OPTOStokes: Bridging the Precision Gap Leveraging advanced PVD technologies, we deliver:   - Stock & Custom Offerings:  - 500+ standard filters in stock for same-day shipping   - Tailored designs for 0.2λ@632.8 nm precision at 30% lower cost than U.S. rivals   - Quality Assurance:  - ISO 9001-certified processes ### 6. Why Opt for OPTOStokes? | Advantage | Technical Impact | Customer Benefit | | | Multi-material stress optimization | Reflected wavefront ≤0.25λ | Beam alignment error --- ## Filter Fabrication Equipment: PVD Methods & 3 Coating Systems **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/101.html **Summary**: Explore 3 PVD coating systems for filter fabrication: evaporation, magnetron sputtering, and ion beam sputtering. Compare deposition rate, layer capacity, and cost for optimal equipment selection > **Detail Content:** ![Image: Schematic diagram of optical coatings](https://www.optofilters.com/uploads/allimg/20250707/1-250FG1210M95.jpg) Schematic diagram of optical coatings ### 1. Introduction to PVD Filter Manufacturing Filter fabrication primarily uses Physical Vapor Deposition (PVD), where film materials are vaporized into atoms/molecules (or ionized) under vacuum, then deposited onto substrates. For fluorescence detection filters, the industry commonly employs three coating systems, detailed below with their unique features. ### 2. Three Key Coating Equipment Types ### 2.1 Evaporation Coating Equipment Advantages: High deposition rate, large single-batch output, low cost Limitations: Max ~100 coating layers; thickness control error ~0.5%  To achieve OD6 isolation for excitation/emission filters, 4–5 sub-filters must be glued together. ### 2.2 Magnetron Sputtering Equipment Compared to evaporation systems: Advantages: Better film uniformity; higher thickness precision (error ~0.2%); max ~200 layers Limitations: Smaller batch output; higher cost  For OD6 filters, a dual-side coating approach on one substrate is feasible. ### 2.3 Ion Beam Sputtering Equipment Advantages: Excellent uniformity; ultra-precise thickness control (error ~0.1%); >500 layers Limitations: Slow deposition rate; minimal batch output; highest cost  Enables single-side coating for OD6 filters on a single substrate. ### 3. Critical Considerations for Equipment Selection - Substrate Quality: Sputtering methods (magnetron/ion beam) require high surface finish substrates to avoid surface hazing.   - Process Monitoring: Advanced thickness control is essential to minimize spectral deviation from design specs.  Conclusion: Each system offers trade-offs. Optimal selection balances spectral requirements, manufacturing difficulty, and cost—e.g., evaporation for high-volume/low-layer needs, sputtering for precision/high-layer applications. --- ## Broadband Negative Filter for Plant Cultivation: Block Yellow-Green Light **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/100.html **Summary**: Engineered to block 500-580nm yellow-green light while transmitting 400-470nm/630-750nm for plant photosynthesis. Electron-beam deposited on K9 glass with ion assistance. > **Detail Content:** ![Image: Optical filters used in plant lamps](https://www.optofilters.com/uploads/allimg/20250707/1-250FG10R1113.jpg) Optical filters used in plant lamps ### 1. Introduction Plant photosynthesis shows strong selectivity for blue-violet (400–470nm) and red light (630–750nm), while yellow-green light (500–580nm) is barely absorbed and may hinder growth. This study introduces a broadband negative filter designed to optimize natural sunlight by blocking detrimental yellow-green wavelengths for enhanced plant cultivation. ### 2. Technical Specifications Key performance requirements: >90% average transmittance in 400–470nm (blue-violet) and 630–750nm (red) 90% average transmittance   - 500–580nm: --- ## Choosing 905nm Filters for Laser Ranging Systems **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/99.html **Summary**: Learn how to select 905nm narrow bandpass filters for laser ranging in autonomous driving, considering wavelength, temperature, and angle factors. > **Detail Content:** ![Image: Schematic diagram of TOF LiDAR principle](https://www.optofilters.com/uploads/allimg/20250707/1-250FFR4401Z.jpg) Schematic diagram of TOF LiDAR principle ### Introduction to Laser Ranging Technology Laser ranging technology, a cornerstone of precision measurement, has evolved significantly with advancements in laser systems. Widely used in military, civilian, and autonomous driving applications, this technology relies on high-performance components like narrow bandpass filters to ensure accurate signal detection. In particular, 905nm laser ranging systems are popular in LiDAR for autonomous vehicles due to their cost-effectiveness and compatibility with silicon detectors. ### Why 905nm Lasers and Filters? Laser ranging systems commonly use 905nm or 1550nm laser sources. The 905nm wavelength is preferred in applications like autonomous driving and guidance systems because it pairs well with affordable silicon-based receivers, unlike 1550nm, which requires more expensive Ge/InGaAs detectors. Narrow bandpass filters are critical for suppressing ambient light and secondary emissions, ensuring reliable signal capture. These filters must be carefully selected to match the laser’s characteristics and operational conditions. ### Key Factors in Selecting 905nm Narrow Bandpass Filters Choosing the right filter parameters for a 905nm laser ranging system involves several considerations to optimize performance. Below are the primary factors to evaluate: Laser Wavelength Tolerance Manufacturers typically specify a wavelength tolerance for 905nm lasers, such as ±5nm. This range accounts for variations in production and ensures the filter’s center wavelength aligns with the laser’s output. Temperature-Induced Wavelength Shift The center wavelength of 905nm semiconductor lasers shifts with temperature, typically by 1nm per 10°C increase. For example, in high-temperature environments, the laser wavelength may shift from 905nm to 910nm or higher, requiring a filter with a slightly longer center wavelength to accommodate this drift. Measurement Angle Range The angle of incidence affects the filter’s effective center wavelength. Larger measurement angles, such as ±20° in autonomous driving, cause the filter’s passband to shift to shorter wavelengths. To compensate, a wider bandwidth and a slightly longer center wavelength may be necessary. For instance, a 20° angle can shift the filter’s center wavelength by approximately 13-23nm, depending on the filter’s effective refractive index. Manufacturing Tolerances Filter production introduces tolerances in center wavelength and bandwidth. High-quality filters minimize these variations, but designers must account for potential deviations to ensure consistent performance across different units. ### Recommended Filter Parameters for Autonomous Driving For a typical 905nm laser ranging system used in autonomous driving with a measurement angle of around 20°, the following filter parameters are suggested based on practical experience: | Parameter | Specification | | | Center Wavelength | 922 ± 3nm | | | Bandwidth (FWHM) | 66 ± 6nm | | | Peak Transmission | >95% | | | Optical Density (OD) | >4 at 200-1100nm | | These parameters ensure the filter accommodates wavelength shifts due to temperature and angle variations while maintaining high transmission and effective blocking of unwanted light. The 66nm bandwidth, though wider than typical 10nm filters, is chosen to cover the laser’s spectral width, temperature-induced shifts, and angle-dependent effects, ensuring robust performance in dynamic environments. ### Applications and Considerations The choice of filter parameters varies by application. In autonomous driving, where systems operate in diverse conditions, a wider bandwidth may be preferred for reliability. In contrast, applications requiring ultra-precise measurements, such as scientific instruments, may use narrower bandwidths (e.g., 10nm) for enhanced signal-to-noise ratios. Always consult with filter manufacturers to verify specifications and consider custom solutions for specific needs. ### Conclusion Selecting the right 905nm narrow bandpass filter is crucial for optimizing laser ranging systems, particularly in demanding applications like autonomous driving. By carefully considering laser wavelength tolerance, temperature effects, measurement angles, and manufacturing tolerances, designers can ensure reliable performance. The recommended parameters provide a practical starting point, but customization may be necessary to meet unique operational requirements. --- ## Essential Optical Thin Film Materials for Precision Applications **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/98.html **Summary**: Explore optical thin film materials for high-precision coatings. Learn deposition techniques and properties for UV, VIS, NIR, IR, and fluorescence applications. > **Detail Content:** ![Image: coating materials](https://www.optofilters.com/uploads/allimg/20250706/1-250F6130005525.jpg) Optical thin film coating materials ### Introduction to Optical Thin Film Materials Advancements in optical thin film deposition have driven the development of sophisticated coating techniques, with testing methods evolving to meet rising quality demands. The choice of materials is critical to achieving desired optical performance. While many materials exist, only a select few are suitable for optical thin films. Different spectral regions require specific materials, tailored for applications like optical filters and high-precision coatings. Below, we explore commonly used materials and their properties. ### Key Optical Thin Film Materials The following table summarizes the characteristics of essential materials used in high-precision optical coatings: | Material | Transmission Range (nm) | Refractive Index (500nm) | Evaporation Temp (°C) | Evaporation Source | Applications | Outgassing | | | Y2O3 | 250-8000 | 1.79 | 2300-2500 | Electron gun | Anti-reflective, Al protective coatings | None | | | CeO2 | 400-16000 | 2.35 | ~2000 | Electron gun | Anti-reflective coatings | High | | | MgO | 200-4000 | 1.70 | ~2000 | Electron gun | UV coatings, anti-reflective | Low | | | ZnS | 400-14000 | 2.35 (550nm) | 1000-1100 | Electron gun, Ta/Mo boat | Anti-reflective, IR coatings | Sublimation | | | TiO2 | 400-12000 | 2.35 | 2000-2200 | Electron gun | Anti-reflective, high-reflection coatings | High | | ### Yttrium Oxide (Y2O3) Y2O3 is deposited via electron beam evaporation, with a refractive index of approximately 1.79 at 500nm, varying with thickness. It is highly popular as a protective layer for aluminum, especially for high-incidence angles in the 800-12000nm range, and is suitable for eyewear coatings due to its stability in humid conditions for up to 24 hours. Available in granular or flake form, it is ideal for optical thin film materials. ### Cerium Dioxide (CeO2) CeO2 is evaporated using a high-density tungsten boat, achieving a refractive index of about 2.2 at 200°C substrate temperature, increasing to 2.45 at 300°C for 500nm. It exhibits absorption below 400nm and around 3000nm. Traditional evaporation yields less dense films, but ion-assisted deposition (IAD) produces low-absorption films with n=2.35 at 500nm. Typically granular, it is used in anti-reflective coatings and optical filters. [Note: Additional materials like MgO, ZnS, TiO2, etc., can be detailed similarly upon request.] ### Thin Films on Plastic Substrates Coating plastic substrates, such as CR-39 (n=1.5), PMMA (n=1.48-1.5), and polycarbonate (n=1.59), requires careful material selection due to low-temperature constraints. Materials like SiO2 (n=1.45), Al2O3 (n=1.62), and M1 (n=1.65) are suitable for low-temperature deposition. MgF2 is less effective below 200°C, as it struggles to form stable films. IAD can enhance film durability on plastics, ensuring robust high-precision optical coatings. ### Why Choose OptoStokes? OptoStokes specializes in high-precision optical filters and thin film materials for UV, VIS, NIR, IR, and fluorescence applications. Our custom designs meet international standards at competitive prices, delivering solutions for spectroscopy, imaging, and more. Visit www.optofilters.com to explore our offerings and request a quote. --- ## Fluorescence Filters for Precision Imaging **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/97.html **Summary**: Understand how fluorescent filters improve the quality of microscope imaging. OptoStokes provides high-precision optical filters, supports fluorescence detection, and custom designs that comply with global standards. > **Detail Content:** ### ![Image: Fluorescent group spectral curve](https://www.optofilters.com/uploads/ueditor/20250706/1-250F6120U4a8.jpg) Common fluorescent group spectral curves ### Introduction to Fluorescence Filters Fluorescence filters are critical components in fluorescence microscopy, enabling precise separation of excitation and emission light for clear imaging. MOVO OPTO offers high-precision optical filters optimized for superior fluorescence detection. ### How Fluorophores Work Fluorophores, or fluorescent dyes, absorb energy at specific wavelengths (e.g., UV or blue light) and emit light at longer wavelengths (e.g., green or red). Matching peak excitation and emission wavelengths with filters ensures optimal image clarity. ### Components of Fluorescence Filters Fluorescence filter sets typically include: Excitation Filter: Allows only the excitation wavelength to pass, often a bandpass filter. Emission Filter: Transmits the fluorescence signal while blocking other light, requiring high optical density (OD5+). Dichroic Mirror: Positioned at 45°, reflects excitation light (>90% reflectivity) and transmits emission light (>90% transmittance). ### Applications and Performance Used in PCR machines, fluorescence immunoassays, and microscopes, these filters demand high cutoff depth (OD5+) and excellent surface quality to prevent blurry images. ### Why Choose OptoStokes? OptoStokes delivers custom fluorescence filters for UV, VIS, NIR, IR, and fluorescence applications, meeting global standards. Visit www.optofilters.com for tailored solutions. --- ## Understanding Light Pollution: Causes, Effects, and Solutions in 2025 **Type**: Articles **URL**: https://www.optofilters.com/case/96.html **Summary**: Understand the causes, ecological and health impacts, and solutions of light pollution in 2025. OptoStokes's optical filters help reduce light damage and improve astronomical observation results, meeting global standards. > **Detail Content:** ### ![Image: Light damage](https://www.optofilters.com/uploads/allimg/20250707/1-250FG9510V04.webp) ### What is Light Pollution? Light pollution, or photopollution, arises from excessive or poorly designed artificial outdoor lighting, such as streetlights, neon signs, and billboards. This light scatters in the atmosphere via clouds or fog, brightening the night sky and reducing star visibility. In 2025, LED technology has intensified this issue, impacting ecosystems and human health. ### Global Light Pollution Challenges Satellite imagery, like the 2012 Suomi NPP data, shows cities wasting light upward. By 2025, the International Dark-Sky Association (IDA) notes over 350 certified dark-sky places globally, highlighting efforts to combat light pollution, especially at observatories where astronomers monitor sky brightness. ### Ecological and Health Impacts Light pollution disrupts ecosystems: Birds collide with buildings due to misguiding lights. Insects like moths and dragonflies die from attraction to lights. Sea turtles alter egg-laying due to beach lighting. For humans, it may cause sleep disorders, increased cancer risks, and negative emotional effects, as per 2025 research. ![Image: Deep space photography works](https://www.optofilters.com/uploads/allimg/20250705/1-250F515544IF.jpg) ### Solutions to Reduce Light Pollution Effective measures include: Minimizing unnecessary outdoor lighting. Using shielded fixtures to direct light downward. Selecting dark-sky-friendly sources, like light pollution filters for astronomy. ![Image: light damage filter](https://www.optofilters.com/uploads/allimg/20250705/1-250F5155U6264.jpg) ### OptoStokes’s Role OptoStokes offers high-precision optical filters, including custom light pollution filters as UHC alternatives, enhancing astronomical observations and supporting environmental protection. Visit www.optofilters.com for UV, VIS, NIR, IR, and fluorescence solutions meeting global standards. --- ## Optical Filter Angle of Incidence: Key Tips **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/95.html **Summary**: Explore how angle of incidence affects optical filter performance in fluorescence and imaging. OptoStokes offers high-precision, custom filters for optimal results. > **Detail Content:** ### Angle of Incidence in Optical Filters ![Image: Optical Filter Angle of Incidence](https://www.optofilters.com/uploads/allimg/20250707/1-250FH00110R9.webp) ### Understanding Angle of Incidence The angle of incidence (AOI) is the angle between incoming light and the optical filter’s surface normal. It’s not the angle from the light source to the filter’s center. Without collimation, light remains divergent, and the AOI is never 0°. ### Impact on Interference Filters Interference filters, like narrowband optical filters, are highly sensitive to AOI. For an 850nm narrowband filter, increasing the AOI shifts the center wavelength to shorter values. At 50°, the wavelength may drop to ~760nm, altering performance. ![Image: Impact on Interference Filters](https://www.optofilters.com/uploads/allimg/20250707/1-250FH00142594.webp) ### Placement Matters Place filters between the lens and CCD/CMOS, where divergence angles are typically ≤12°, ensuring stable performance. Positioning filters in front of the lens exposes them to wide-angle stray light, reducing effectiveness in applications like fluorescence microscopy. ### Why Choose OptoStokes? OptoStokes’s high-precision optical filters are designed for optimal AOI performance in UV, VIS, NIR, IR, and fluorescence applications. Explore custom optical filters at www.optofilters.com, meeting global standards. --- ## Optical Filter Uniformity: Boost Performance **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/94.html **Summary**: Learn how thickness uniformity enhances optical filter performance in spectroscopy and imaging. OptoStokes offers high-precision, custom filters meeting global standards > **Detail Content:** ### Optical Filter Thickness Uniformity Insights ![Image: Boost Performance](https://www.optofilters.com/uploads/allimg/20250705/1-250F511251V06.jpg) ### Importance of Thickness Uniformity Optical filters rely on uniform film thickness to ensure consistent spectral performance. Variations in thickness across the substrate can degrade filter characteristics, impacting applications like spectroscopy and imaging. ### Anti-Reflection Coatings For single-layer MgF2 anti-reflection coatings (thickness λ0/4, e.g., 130nm at λ0=520nm), thickness variation should typically not exceed 4nm to avoid color inconsistencies across the substrate. ### Narrowband Filters Narrowband filters require stringent uniformity. Variations must keep peak wavelength shifts below 0.3 times the FWHM (e.g., 6nm for a 20nm FWHM filter with a 50mm diameter). Larger or narrower filters demand even tighter control. ### Cutoff Filters High-steepness cutoff filters need uniform thickness to maintain sharp transitions. Poor uniformity can broaden the transition zone, reducing performance in applications like fluorescence microscopy. ### Why Choose OptoStokes? OptoStokes delivers high-precision optical filters with superior thickness uniformity for UV, VIS, NIR, IR, and fluorescence applications. Explore our custom optical filters at www.optofilters.com, meeting global standards. --- ## Optical Thin Film Composition: Key Insights **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/93.html **Summary**: Discover optical thin film composition insights for optical filters. Learn how deposition affects performance in spectroscopy and imaging. Explore custom solutions at OptoStokes > **Detail Content:** ### Optical Thin Film Composition Insights ![Image: Optical Thin Films](https://www.optofilters.com/uploads/ueditor/20250705/1-250F511043H23.jpg) ### Introduction to Optical Thin Films Optical filters rely on thin films formed by depositing materials onto substrates through phase transitions (solid-liquid-gas-solid or solid-gas-solid). These films differ from bulk materials in microstructure, crystal structure, and composition, impacting their performance in applications like spectroscopy and imaging. ### Evaporation of Elements Most metals evaporate as single atoms, but semiconductors and semimetals often form clusters. For example, antimony (Sb) films primarily contain Sb4 clusters, with some Sb2 and trace Sb. Arsenic (As) forms As4 and As2, while bismuth (Bi) and tellurium (Te) include Bi2 and Te2. Similar clusters appear in carbon (C), cerium (Ce), selenium (Se), and silicon (Si). ### Compound Thin Films Compounds behave complexly during deposition. Sulfides like ZnS decompose (e.g., 2ZnS → 2Zn + S2) but recombine on the substrate, yielding films close to bulk stoichiometry. Cadmium telluride (CdTe) breaks into Cd and Te2. Fluorides experience defluorination, increasing moisture absorption. Using large-capacity evaporation sources minimizes this issue. ### Fluoride Film Defluorination The table below shows fluorine loss in fluoride films: | Film | Atoms | Concentration Ratio | | | Na3AlF6 | F/Na, F/Al | 1.3, 3.6 | | | MgF2 | F/Mg | 1.3 | | | SrF2 | F/Sr | 1.4 | | | BaF2 | F/Ba | 1.5 | | | NaF | F/Na | 0.6 | | ### Oxide Films Oxides lose oxygen during evaporation. Even stable SiO2 contains SiO and O2. Severe oxygen loss occurs in TiO2, Ta2O5, and NiO, while MgO, Al2O3, BeO, and CoO closely match bulk compositions. ### Sputtering and Clusters Sputtering produces composite atoms. For copper (Cu) at 100 eV with Ar+, only 5% is single Cu atoms; most are Cu2 or Cu+n (n=1–11) for single-crystal targets. Aluminum (Al) sputtering yields Aln clusters (n=1–7 or 1–18). For GaAs, 99% of sputtered material is neutral Ga and As atoms. ### Composition Analysis Surface analysis techniques, using photons, electrons, or ions, identify thin film composition by analyzing secondary particle emissions from surface interactions. ### Why Choose OptoStokes? OptoStokes offers precision optical filters with tailored compositions for UV, VIS, NIR, and IR applications. Explore our custom optical filters at www.optofilters.com, meeting global standards. --- ## OptoStokes: Arbor Day 2025 & Eco-Friendly Optical Filters **Type**: Articles **URL**: https://www.optofilters.com/company-news/92.html **Summary**: Join OptoStokes’s Arbor Day 2025 tree-planting event! Office closed March 12. Explore our eco-friendly, high-precision optical filters at www.optofilters.com. Contact sales@optofilters.com. > **Detail Content:** ### OptoStokes 2025 Arbor Day Green Initiative ### Arbor Day Greetings OptoStokes celebrates Arbor Day on March 12, 2025, promoting a greener future! ### Eco-Friendly Production We integrate sustainability into our high-precision optical filters, using eco-conscious processes to support environmental protection. ### Arbor Day Event Join our tree-planting event on March 12, 2025. Our office will be closed for the day. ### Our Optical Filters Explore custom optical filters for UV, VIS, NIR, IR, and fluorescence at www.optofilters.com, meeting global standards. ### Contact Us For inquiries, email sales@optofilters.com. We’re here to assist! --- ## OptoStokes: Women’s Day 2025 & Optical Filter Solutions **Type**: Articles **URL**: https://www.optofilters.com/company-news/91.html **Summary**: Celebrate Women’s Day 2025 with OptoStokes! Office closed March 8. Explore our high-precision optical filters for fluorescence and imaging at www.optofilters.com. Email sales@optofilters.com > **Detail Content:** ### OptoStokes 2025 Women’s Day Holiday Notice ![Image: MOVO OPTO 2025 Women’s Day Holiday Notice](https://www.optofilters.com/uploads/allimg/20250705/1-250F5103443300.jpg) ### Celebrating Women’s Day OptoStokes extends warm wishes for International Women’s Day on March 8, 2025, celebrating women’s contributions! ### Commitment to Women’s Rights We are dedicated to supporting women’s rights, fostering an inclusive workplace for our team and clients. ### Holiday Closure Our office will be closed on March 8, 2025, for Women’s Day. ### Discover Our Optical Filters Explore high-precision optical filters for UV, VIS, NIR, IR, and fluorescence at www.optofilters.com. Custom solutions available. ### Contact Us For inquiries, email sales@optofilters.com. We’re here to support your needs. --- ## OptoStokes: Labor Day 2025 & Optical Filter Updates **Type**: Articles **URL**: https://www.optofilters.com/company-news/90.html **Summary**: OptoStokes’s Labor Day closure: May 1–5, 2025. Explore our high-precision optical filters for fluorescence and imaging at www.optofilters.com. Contact sales@optofilters.com for inquiries. > **Detail Content:** ### OptoStokes 2025 Labor Day Holiday Notice ### Warm Labor Day Wishes OptoStokes wishes everyone a joyful Labor Day, celebrating hard work and innovation! ### Holiday Closure Our office will be closed from May 1–5, 2025, for the Labor Day holiday. ### Explore Our Optical Filters Discover our high-precision optical filters for UV, VIS, NIR, IR, and fluorescence applications at www.optofilters.com. We offer standard and custom optical filters meeting global standards. ### Contact Us For urgent inquiries, reach out to sales@optofilters.com. Our team is ready to assist. ### Stay Tuned Exciting precision optical filter innovations are coming soon. Follow us for updates! --- ## Guide to Optical Filter Surface Quality for Precision Imaging **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/89.html **Summary**: Explore optical filter surface quality for imaging and fluorescence. Our precision filters, including IR cut-off and custom designs, ensure clarity and meet global standards. > **Detail Content:** ### Optical Filter Surface Quality Guide ### Importance of Optical Filters Optical filters are essential for isolating signal light and blocking interference in applications from aerospace to smartphone cameras. Their surface quality directly impacts performance, ensuring accurate imaging and signal detection. ### Spectral Performance Spectral characteristics are critical for optical filters. For example, IR cut-off filters used in digital cameras transmit visible light (400–700 nm) with high efficiency while blocking near-infrared light (700–1100 nm) to ensure true color reproduction. ### Surface Figure Surface figure refers to the overall and local shape of a filter’s surface. Global surface figure defines the filter’s general shape, while local surface irregularities, visible under high magnification, can cause image distortion, especially in imaging applications like microscopy. ### Surface Quality Surface quality, measured by scratches and digs, affects image clarity. Filters placed near image sensors require high surface quality (e.g., 40-20 scratch-dig) to avoid defects impacting sharpness in applications like machine vision. ### Surface Roughness Surface roughness influences light scattering, critical for filters requiring high optical density (e.g., OD5, --- ## How to Clean Optical Filters for Peak Performance **Type**: Articles **URL**: https://www.optofilters.com/case/88.html **Summary**: Learn how to clean optical filters and components for optimal performance. Our expert tips ensure scratch-free maintenance, with custom and stock filters meeting global standards. > **Detail Content:** ### Cleaning Optical Filters and Components ### Importance of Optical Component Maintenance Optical filters and components like mirrors, prisms, lenses, and windows are critical in applications such as laser processing, life sciences, and machine vision. Proper cleaning ensures optimal performance and longevity, preventing scratches or contamination that could degrade image quality. ![Image: Cleaning Optical Filters](https://www.optofilters.com/uploads/allimg/20250704/1-250F419552M21.jpg) ### Cleaning Environment and Tools Clean optical components in a dust-free environment to avoid surface damage. Essential tools and reagents include: Gloves or Finger Cots: Prevent oil and dust transfer from hands. Tweezers: Safely handle components. Air Gun: Blows away loose dust with compressed gas. Lens Tissue or Wipes: Non-abrasive for delicate surfaces. Reagents: Reagent-grade isopropyl alcohol, acetone, or deionized water for effective cleaning. ### Cleaning Spherical Optical Components For spherical components like lenses or optical filters: Use an air gun to remove loose dust. For fingerprints, watermarks, or oils, apply reagent-grade isopropyl alcohol or acetone to lens tissue. Gently wipe from the center outward in a circular motion, rotating the component until clean. ### Cleaning Flat Optical Components For flat components like windows or mirrors: Blow off dust with an air gun. Use lens tissue soaked with cleaning reagent to gently drag across the surface. Apply a controlled technique to ensure even evaporation, avoiding streaks or spots. ### Precautions for Safe Cleaning Metal Coatings: Avoid wiping bare gold or similar coatings; use preventive measures to minimize cleaning needs. Microstructured Components: Clean gratings or micro-optics with an air gun only to prevent surface damage. ### Why Choose OptoStokes? OptoStokes provides expert support for maintaining optical filters and components: Precision Optics Maintenance: Guidance to protect high-performance coatings. Custom and Stock Solutions: Filters tailored to UV, VIS, NIR, and IR applications. Global Standards: Quality matching international benchmarks at competitive prices. --- ## Fluorescence Microscopy Filters for High-Precision Imaging **Type**: Articles **URL**: https://www.optofilters.com/case/87.html **Summary**: High-precision fluorescence microscopy filters enhance imaging clarity. Our custom and stock optical filters ensure optimal wavelength control, meeting global standards for biomedical research. > **Detail Content:** ![Image: fluorescence microscopy filters](https://www.optofilters.com/uploads/allimg/20250707/1-250FG953459B.webp) ### Introduction to Fluorescence Microscopy Fluorescence microscopy is a cornerstone of biomedical research, enabling detailed visualization of cellular structures. Optical filters are critical components, ensuring precise wavelength control for clear, high-contrast images. ### How Fluorescence Microscopy Works A fluorescence microscope uses a high-energy light source to excite a sample. The light passes through an excitation filter, selecting a specific wavelength, and is reflected by a dichroic mirror onto the sample. The sample emits fluorescence, which passes through the dichroic mirror and an emission filter before being observed by the eye or captured by a camera. ### Role of Optical Filters The filter system, comprising the excitation filter, dichroic mirror, and emission filter, is essential for image quality: Excitation Filter: Selects the wavelength to excite the sample’s fluorophores. Dichroic Mirror: Separates excitation and emission light. Emission Filter: Blocks excitation light with high optical density, ensuring only the weaker fluorescence signal is captured, enhancing clarity. ### Choosing the Right Filters Filter selection depends on the sample’s excitation and emission wavelengths. For non-fluorescent samples, fluorescent probes are used to enable imaging. Precise filter matching ensures high signal-to-noise ratios, critical for applications like cellular analysis or disease research. ### Why Choose Our Fluorescence Filters? As a leading supplier, we offer: High-Precision Filters: Fluorescence microscopy filters with high optical density for superior image clarity. Custom and Stock Solutions: Tailored custom fluorescence filter sets or standard options for diverse needs. Global Standards: Quality matching international benchmarks at competitive prices. --- ## Precision Optical Filters for Spectroscopy & Imaging **Type**: Articles **URL**: https://www.optofilters.com/case/86.html **Summary**: High-precision optical filters for spectroscopy, imaging, and laser applications. Our bandpass and IR cut-off filters ensure superior performance, available in stock or custom designs, meeting global standards. > **Detail Content:** ![Image: Introduction to Optical Filters](https://www.optofilters.com/uploads/allimg/20250707/1-250FG9545A27.webp) ### Introduction to Optical Filters Optical filters are essential components in modern optical systems, enabling precise wavelength control. By selectively transmitting, reflecting, or absorbing light, they enhance performance in applications like spectroscopy, imaging, and laser technology. ### Types of Optical Filters Optical filters for spectral filtering include: Bandpass Filters: Transmit a specific wavelength range while blocking others.Wideband: Cover broader ranges (tens to hundreds of nanometers), ideal for color enhancement or general spectral selection. Narrowband: Feature narrow bandwidths (a few nanometers), critical for high-precision applications like fluorescence detection or laser systems. Longpass Filters: Transmit wavelengths above a cut-off, used in fluorescence microscopy or phototherapy. Shortpass Filters: Transmit wavelengths below a cut-off, common in IR cut-off applications for cameras. ### Key Applications Our optical filters serve diverse industries: Fluorescence Detection: Bandpass filters for fluorescence isolate excitation or emission wavelengths, enhancing signal clarity in biomedical analysis. Laser Technology: Narrowband filters protect lenses and isolate weak signals in laser ranging or LiDAR. Machine Vision: Filters like BP870 enhance contrast for defect detection or barcode reading. Environmental Monitoring: Filters (e.g., NBP870) detect specific gas or water quality spectra. Astronomy: Narrowband filters (e.g., H-α at 656.3nm) enable observation of celestial features. ### Critical Performance Parameters Filter selection hinges on: Center Wavelength (CWL) Accuracy: Essential for precision applications (±0.5nm or better). – Narrowband Filters: Require narrow bandwidths (FWHM) and high optical density (OD5+) to maximize signal-to-noise ratio. Transmittance: High peak transmittance (>90%) ensures strong signal output. Cut-off Steepness: Sharp transitions improve wavelength separation. Environmental Durability: Filters must withstand temperature, humidity, and laser-induced damage. ### Filter Selection Guide Choosing the right filter involves: Define Application Goals: Identify whether you need signal isolation, interference blocking, or specific lighting effects. Assess Parameters: Prioritize CWL accuracy, bandwidth, OD, and transmittance based on application needs. Match Light Source and Detector: Align filter specifications with source emission and detector response curves. Review Specifications: Check CWL, bandwidth, OD, cut-off steepness, and material properties. Consider Environmental Factors: Ensure durability for operating conditions like temperature or humidity. Balance Cost and Performance: Opt for cost-effective solutions without compromising critical requirements. Consult Experts: Work with our team for tailored solutions or complex applications. ### Why Choose Our Optical Filters? As a leading supplier, we offer: High-Precision Filters: Narrowband filters for spectroscopy and imaging with superior accuracy and durability. Custom and Stock Solutions: From IR cut-off to fluorescence filter sets, tailored to your needs. Competitive Quality: Matching global standards at cost-effective prices, ensuring reliable performance. --- ## Optical Filters for Machine Vision Applications **Type**: Articles **URL**: https://www.optofilters.com/case/85.html **Summary**: High-precision optical filters for machine vision enhance image contrast and clarity. Our IR cut-off and bandpass filters, available in stock or custom designs, meet global standards at competitive prices. > **Detail Content:** ### ### Introduction to Machine Vision Filters In machine vision, optical filters enhance image quality by controlling light wavelengths. Understanding the types and technologies behind filters is key to leveraging their benefits in applications like inspection and imaging. ![Image: Machine Vision Filters](https://www.optofilters.com/uploads/allimg/20250707/1-250FG95615Z0.webp) ### Colored Glass Filters Colored glass filters are widely used in machine vision due to their affordability and simplicity. Created by doping glass with elements that alter its absorption and transmission properties, these filters offer: Cost-Effectiveness: Lower cost compared to interference filters. Angle Stability: No wavelength shift when used with wide-angle lenses. Applications: Common in IR cut-off filters to block infrared light, improving color accuracy in color cameras and contrast in monochrome cameras. However, their broad cut-off bands and lower transmittance limit precision compared to interference filters. ![Image: Colored Glass Filters](https://www.optofilters.com/uploads/allimg/20250707/1-250FG9563D22.webp) ### Interference Filters Coated interference filters provide sharper cut-off transitions, higher transmittance, and better blocking. They are manufactured by depositing dielectric layers on a substrate, creating precise spectral control through constructive and destructive interference. Types include: Bandpass Filters: Transmit a specific wavelength range, ideal for imaging applications. Longpass Filters: Block shorter wavelengths, transmit longer ones. Shortpass Filters: Transmit shorter wavelengths, block longer ones. Notch Filters: Block a specific wavelength range, transmit others. Interference filters excel in applications requiring high precision but may exhibit blue shift with wide-angle lenses due to angle-of-incidence (AOI) effects, impacting wavelength transmission. ### Applications in Machine Vision ![Image: Color Filters](https://www.optofilters.com/uploads/allimg/20250707/1-250FG95AK13.webp) Optical filters enhance contrast and block unwanted light in machine vision systems: IR Cut-Off Filters: Block infrared light to improve image clarity in color and monochrome cameras. Color Filters: Boost contrast, as seen in a gel capsule sorting application where a green filter increased contrast from 8.7% to 86.5%. Neutral Density (ND) Filters: Control brightness without altering exposure or f-number, ideal for high-intensity applications like welding. Polarization Filters: Reduce specular reflections for imaging shiny surfaces. ### Why Choose Our Optical Filters? As a trusted supplier of optical filters, we offer: High Precision: Filters with sharp cut-offs and high transmittance for superior performance. Custom and Standard Solutions: Stock filters and tailored designs for UV, VIS, NIR, and IR applications. Competitive Quality: Matching international standards at cost-effective prices. --- ## Optical Filters for IPL & OPT Skin Rejuvenation **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/84.html **Summary**: Explore advanced optical filters for IPL and OPT skin rejuvenation devices. Our precision filters enhance treatment safety and efficacy, targeting pigmentation and wrinkles with optimal wavelength control. > **Detail Content:** ### Introduction to Pulsed Light Skin Rejuvenation In today’s advanced beauty industry, pulsed light technologies like Intense Pulsed Light (IPL) and Optimal Pulsed Light (OPT) are popular for non-invasive skin rejuvenation. These technologies improve skin texture, addressing issues like pigmentation, wrinkles, and enlarged pores. Optical filters play a critical role in ensuring the safety and efficacy of these treatments. ![Image: optical filters for IPL and OPT](https://www.optofilters.com/uploads/allimg/20250704/1-250F4115052K7.jpg) ### IPL vs. OPT: Treatment Outcomes IPL and OPT both utilize pulsed light to stimulate skin repair, but OPT, an advanced version of IPL, delivers superior results. IPL employs a broad-spectrum light (400-1200nm) with decaying pulse energy, which may lead to uneven treatment outcomes. In contrast, OPT uses a square wave pulse, delivering uniform energy across each pulse. This ensures consistent results, making OPT more effective for treating pigmentation, wrinkles, and enlarged pores. ### Key Differences Between IPL and OPT Technology: IPL emits non-coherent, multi-wavelength light, while OPT optimizes this with uniform pulse energy for enhanced precision and efficiency. Energy Delivery: IPL’s pulse energy decreases over time, potentially causing inconsistent results. OPT maintains steady energy output, improving treatment stability. Safety and Comfort: OPT’s uniform energy reduces skin damage and discomfort, offering a gentler treatment experience. Treatment Scope: Both technologies address skin laxity and enlarged pores, but OPT excels in tackling a broader range of issues, including stubborn pigmentation and fine lines. ### Role of Optical Filters in IPL and OPT Optical filters are essential components in IPL and OPT systems, enabling precise control over light wavelengths: Selective Wavelength Filtering: Filters allow specific wavelengths (e.g., 530-1200nm) to penetrate the skin, targeting issues like pigmentation while minimizing damage to surrounding tissue. Safety Enhancement: By blocking harmful ultraviolet and short-wavelength light, filters reduce risks of burns or pigmentation changes. Customized Treatment: Filters tailor the light spectrum to suit different skin types and conditions, ensuring optimal results. ### Why Choose Our Optical Filters? As a leading supplier of optical filters for IPL and OPT devices, we offer: Precision Engineering: Our filters ensure accurate spectral control for safe and effective treatments. Versatile Solutions: Available in standard and custom configurations to meet diverse application needs. Proven Reliability: Designed to withstand high-energy pulsed light, ensuring long-term performance. --- ## Optical Filters for High-Performance IPL Hair Removal **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/83.html **Summary**: Discover high-performance optical filters for IPL hair removal devices. Our longpass filters ensure precise spectral shaping, enhancing safety and efficacy for professional and at-home hair removal systems. > **Detail Content:** ![Image: IPL optical filters](https://www.optofilters.com/uploads/allimg/20250704/1-250F41131545P.jpg) ### Overview of IPL Hair Removal Intense Pulsed Light (IPL) hair removal devices are advanced, non-invasive tools widely used in both professional and at-home beauty treatments. Unlike traditional laser hair removal, which uses a single wavelength, IPL devices emit a broad spectrum of light (400-1200nm) filtered to target hair follicles effectively. Our optical filters are critical components in IPL systems, ensuring safe and efficient hair removal. ### How IPL Hair Removal Works IPL technology relies on selective photothermolysis to achieve long-term hair reduction: Selective Absorption: Melanin in hair follicles absorbs light in the visible to near-infrared range. Energy Conversion: Absorbed light converts to heat, reaching temperatures above 70°C in milliseconds. Thermal Damage: The heat precisely targets the hair follicle’s growth structures, minimizing damage to surrounding skin. Hair Reduction: Damaged follicles enter a dormant state, reducing hair regrowth over time. ### Role of Optical Filters in IPL Devices Optical filters shape the broad spectrum of xenon lamp light used in IPL devices. Their primary functions include: Blocking Harmful Light: Filters eliminate ultraviolet (90% for maximum light throughput. Blocking Efficiency: Optical density (OD) ≥4 for effective rejection of unwanted wavelengths. Edge Steepness: 10-30nm transition for precise spectral control. Thermal Stability: Operates reliably above 80°C. Materials: High-quality quartz glass or sapphire for durability under intense pulsed light. Damage Threshold: High resistance to thermal and optical damage from high-power pulses. ### Why Choose Our Optical Filters? As a trusted supplier of optical filters for IPL devices, we provide: Standard and Custom Solutions: Choose from stock filters or request tailored designs to meet specific wavelength requirements. Superior Quality: Steep edge filters ensure precise spectral separation, minimizing skin risks. Industry Expertise: Our filters are engineered to withstand the high-energy demands of IPL systems, ensuring long-term performance. --- ## What is our mission ? **Type**: Articles **URL**: https://www.optofilters.com/company-vision/68.html **Summary**: To craft precision through technology, deliver clarity via optical filters, and empower global optical innovation with high-quality solutions. > **Detail Content:** Technology crafts precision, filtering delivers clarity, and empowers global optical innovation.  Providing high-quality optical solutions for thousands of industries, uphold the dedication to precision manufacturing, and let optical filters brighten every clear field of vision. --- ## Edge Optical Filters for Longpass & Shortpass Applications **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/63.html **Summary**: Discover precision edge optical filters, including longpass and shortpass filters, for fluorescence microscopy, UV detection, and imaging. High transmittance and steep edges ensure optimal performance across industries. > **Detail Content:** ### Overview of Edge Filters As a trusted manufacturer of optical filters, we specialize in custom edge filters, including longpass and shortpass filters. These precision components are essential for applications requiring selective wavelength transmission, such as imaging, spectroscopy, and medical diagnostics. ### Understanding Longpass and Shortpass Filters Edge filters are categorized into two types: Longpass Filters: These transmit longer wavelengths while reflecting shorter ones, ideal for applications needing precise spectral separation. Shortpass Filters: These transmit shorter wavelengths and reflect longer ones, with the cut-off wavelength (50% transmission point) being a critical parameter. ### Spectral Characteristics The primary difference between longpass and shortpass filters lies in their transmission ranges: Longpass Filters: Allow wavelengths above a specified cut-off (e.g., 590nm, 600nm, 650nm, 700nm) to pass, blocking shorter wavelengths. Shortpass Filters: Permit shorter wavelengths to pass while blocking longer ones, commonly used in UV detection or infrared rejection. ### Applications of Edge Filters Our edge optical filters are designed for diverse industries: Longpass Filters: Widely used in fluorescence microscopy, Raman spectroscopy, astronomy, environmental monitoring, and biomedical imaging for selective long-wavelength transmission. Shortpass Filters: Ideal for UV spectroscopy, imaging systems, and hot mirrors, where they block unwanted infrared radiation to reduce distortion. ### Why Choose Our Edge Filters? OptoStokes’s edge filters deliver exceptional performance: Steep Edge Transitions: Ensure precise wavelength separation for enhanced clarity. High Transmittance: Achieve over 90% transmission in the passband. Versatile Applications: Suitable for UV, visible, and infrared applications in medical, industrial, laboratory, and defense sectors. Custom Solutions: Tailored to meet specific wavelength and performance requirements. --- ## Bandpass Optical Filters for Precision Application **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/52.html **Summary**: High-precision bandpass optical filters for laser and spectroscopy applications. OptoStokes’s filters ensure accurate wavelength control, available in stock or custom designs, meeting global standards. > **Detail Content:** ![Image: FWHM](https://www.optofilters.com/uploads/allimg/20250704/1-250F4191359524.jpg) ### Introduction to Bandpass Filters Optical filters are vital for controlling light in advanced optical systems. OptoStokes’s bandpass filters, designed with precision dielectric coatings, selectively transmit specific wavelength ranges, making them ideal for applications requiring high accuracy, such as spectroscopy and laser systems. ### How Bandpass Filters Work Bandpass filters utilize a Fabry-Perot (F-P) interference cavity formed by multilayer dielectric coatings. By precisely controlling coating thickness and spacing, these filters achieve the desired center wavelength, ensuring accurate spectral selection for diverse applications. ### Center Wavelength (CWL) The center wavelength (CWL) is the midpoint of the filter’s passband, where peak transmittance is achieved. As wavelengths deviate from the CWL, transmittance decreases.  OptoStokes offers a range of CWL options, designed for collimated, normal-incidence light. Non-collimated or angled incidence may cause a blue shift, moving the CWL to shorter wavelengths. ### Full Width at Half Maximum (FWHM) The FWHM defines the spectral bandwidth where transmittance reaches 50% of the peak value. OptoStokes provides bandpass filters with FWHM options of: Narrowband: 50 nm, perfect for fluorescence microscopy. Laser line filters offer an ultra-narrow FWHM of 3±0.6 nm for high-precision tasks. ### Applications of Bandpass Filters Our bandpass filters excel in: Laser Applications: Purifying laser beams and isolating weak signals in LiDAR or ranging systems. Spectroscopy: Enhancing signal-to-noise ratio in chemical and fluorescence detection. Machine Vision: Improving contrast for defect detection or barcode scanning. Fluorescence Microscopy: Isolating specific emission wavelengths for clear imaging. ### Why Choose OptoStokes Filters? As a trusted supplier, OptoStokes delivers: High Precision: Bandpass filters for laser applications with accurate CWL and narrow FWHM. Custom and Stock Options: Available in 10±2 nm, 25±3 nm, and 50±5 nm, tailored to your needs. Global Standards: Quality matching international benchmarks at competitive prices. --- ## Fluorescence Optical Filters for CY5 and CY5.5 Imaging **Type**: Articles **URL**: https://www.optofilters.com/case/51.html **Summary**: High-precision fluorescence optical filters for CY5 and CY5.5 microscopy enhance image clarity. Our bandpass and custom filter sets deliver superior performance for biomedical imaging, matching global standards at competitive prices. > **Detail Content:** ![Image: CY5 filter sets](https://www.optofilters.com/uploads/allimg/20250707/1-250FG95JV38.webp) ### Introduction to Fluorescence Microscopy Fluorescence microscopy is a powerful tool for visualizing microscopic details in biomedical research. Optical filters, as critical components, directly impact image quality by controlling light wavelengths, especially in demanding applications like CY5 and CY5.5 imaging. ### Challenges of CY5 and CY5.5 Imaging CY5 and CY5.5 are widely used fluorescent dyes in fluorescence microscopy, flow cytometry, and in vivo imaging. Their excitation and emission wavelengths, located in the near-infrared range (approximately 650nm and 680nm for excitation, 670nm and 710nm for emission), require highly precise optical filters. Inadequate filters can weaken or fail to capture fluorescence signals, compromising image clarity. ### How Fluorescence Imaging Works Fluorescence imaging relies on the Stokes shift, where a fluorophore absorbs light at a specific wavelength and emits light at a longer wavelength. For CY5 and CY5.5, fluorescence optical filters ensure that only the desired excitation and emission wavelengths are transmitted, producing clear and accurate images. ### Role of the Fluorescence Filter Cube The fluorescence filter cube consists of three key components: Excitation Filter: Selects the wavelength to excite the fluorophore. Dichroic Mirror: Separates excitation and emission light. Emission Filter: Filters the emitted fluorescence signal for enhanced clarity. These components work together to maximize signal-to-noise ratio and deliver high-quality images. ### Types of Fluorescence Filters Fluorescence filters include: Longpass Filters (LP): Transmit longer wavelengths, suitable for broad emission capture. Shortpass Filters (SP): Transmit shorter wavelengths, used in specific UV applications. Bandpass Filters (BP): Offer the highest signal-to-noise ratio by transmitting a narrow wavelength range, ideal for CY5 and CY5.5 imaging. ### Why Choose Our Fluorescence Filters? As a leading supplier of optical filters, we provide: Precision Performance: High-transmittance CY5 filter sets and bandpass filters ensure superior image clarity. Custom and Standard Options: Stock filters and tailored designs meet diverse application needs. Global Quality Standards: Our filters match international benchmarks at competitive prices, perfect for microscopy and spectroscopy. --- ## Longpass Filters for Spectroscopy & Fluorescence **Type**: Articles **URL**: https://www.optofilters.com/industry-Insights/20.html **Summary**: Explore high-precision longpass optical filters for spectroscopy, fluorescence microscopy, and laser applications. Our custom and standard filters offer superior wavelength control, high transmittance, and quality matching global standards. > **Detail Content:** ### Introduction to Longpass Filters Longpass filters are specialized optical filters that transmit light with wavelengths longer than a specified cut-on wavelength while blocking shorter wavelengths. These precision components are essential in applications requiring selective wavelength control, such as spectroscopy, laser systems, and biomedical imaging. ![Image: Applications of Longpass Filters](https://www.optofilters.com/uploads/allimg/20250704/1-250F4134203112.jpg) ### How Longpass Filters Work Longpass filters operate based on optical interference and diffraction. When light passes through the filter, its internal structure interacts with different wavelengths, allowing only those above the cut-on wavelength to transmit. Shorter wavelengths are either reflected or absorbed, ensuring precise spectral control. ### Applications of Longpass Filters Our longpass optical filters are widely used across industries: Spectroscopy: Filters isolate specific wavelength ranges in UV-visible spectroscopy, enabling accurate measurement of absorption, transmission, or reflection spectra. Laser Technology: They enhance laser beam quality by selecting desired wavelengths and eliminating unwanted ones, improving system stability. Biomedical Imaging: In fluorescence microscopy, longpass filters enable selective observation of fluorescent signals, aiding in cellular and tissue analysis. Other Fields: Applications include optical communications, environmental monitoring, and remote sensing. ### Design Considerations Selecting the right longpass filter involves: Wavelength Range: Common cut-on wavelengths include 590nm, 600nm, 650nm, and 700nm. Blocking Efficiency: High optical density ensures effective rejection of unwanted wavelengths. Transmittance: Over 90% transmission in the passband for optimal performance. Angle Dependence: Filters are designed to maintain performance at specific angles of incidence. Physical Specifications: Size, shape, and mounting options tailored to application needs. ### Why Choose Our Longpass Filters? As a leading supplier of optical filters, we offer: High Precision: Filters with steep cut-on edges and high transmittance for superior performance. Custom Solutions: Tailored designs to meet specific wavelength and application requirements. Industry Standards: Quality matching global benchmarks at competitive prices. ---