Limited-time discounts on our UV, VIS, NIR, and IR optical filters. Standard models are in stock for same-day shipping, ideal for urgent projects. Need a custom filter for your fluorescence setup? Our engineers can design it to your specifications.
Bandpass, longpass, shortpass, fluorescence, dichroic and neutral density filters with defined CWL, FWHM, transmission, blocking, substrate and size requirements.
Why choose us
Broad application coverage
We offer a full range of standard and custom optical filter solutions tailored for UV, VIS, NIR, IR, and fluorescence microscopy uses
Comprehensive product lineup
Our portfolio includes bandpass filters, longpass filters, shortpass filters, dichroic mirrors, neutral density filters, and fluorescence filter sets—all engineered for precision and reliability that meet global standards
Competitive value proposition
Leveraging our China-based manufacturing facility, we deliver cost-effective pricing, flexible production capabilities, and fast lead times
Trusted supply reliability
We excel in unmatched product quality, diverse product options, and consistent supply chain performance for your peace of mind
6,439+
In-Stock Product Models
About Us
Precision Optical Filters for Research, Instrumentation and OEM Systems.OPTOStokes Precision Optics Limited provides precision optical filters, custom-coated optics, and selected optical components for research, imaging, sensing, instrumentation, and OEM applications.We support wavelengths from the UV through the LWIR, supplying both stock filters for fast evaluation and custom solutions for application-specific optical systems. Our filter portfolio includes bandpass, longpass, shortpass, neutral density, dichroic, fluorescence, Raman, notch, and infrared filters, together with optical windows, mirrors, lenses, and prisms.For custom projects, our engineering support covers wavelength and substrate selection, coating design, precision cutting, spectral measurement, and performance review. Custom capabilities include narrowband and high-blocking filters, steep-edge designs, multiband filters, gradient filters, fluorescence imaging filters, Raman edge filters, and infrared filters...
UV to IR Stock & Custom Designs International Quality, Competitive Pricing
Need help selecting the right optical filter?
Contact usExplore OPTOStokes' successful OEM case studies in Fluorescence, Imaging, and IR systems. See our advanced manufacturing capabilities, high-volume production control, and reliable quality assurance process.
Case
SWIR Imaging for Industrial Inspection: Seeing What Vis
Learn how SWIR imaging reveals material differences, silicon defects, moisture, and food composition—and how to select filters for industrial inspection....
Ammonia Detection Filter Selection Guide: 10460nm LWIR
Learn how to select a 10.45 µm Ge-based LWIR narrow bandpass filter for NH3 ammonia detection in NDIR sensors and thermal gas imaging systems....
Application Case: Filter-Based NIR Spectrometer for Gra
The OPTOStokes tags index includes directly usable internal topics such as near infrared, NIR spectroscopy, sampling modes, transmission, reflectance, Beer-Lamb......
The Essential Role of High-Precision IPL Bandpass Filte
OPTOStokes provides high-precision IPL Bandpass Filters for optimal spectral performance. Discover why filter quality, spectral purity, and custom engineering o......
Optical Filters for Machine Vision Applications
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,......
Understanding Light Pollution: Causes, Effects, and Sol
Understand the causes, ecological and health impacts, and solutions of light pollution in 2025. OptoStokes's optical filters help reduce light damage and improv......
Fluorescence Optical Filters for CY5 and CY5.5 Imaging
High-precision fluorescence optical filters for CY5 and CY5.5 microscopy enhance image clarity. Our bandpass and custom filter sets deliver superior performance......
How to Clean Optical Filters for Peak Performance
Learn how to clean optical filters and components for optimal performance. Our expert tips ensure scratch-free maintenance, with custom and stock filters meetin......
Precision Optical Filters for Spectroscopy & Imagin
High-precision optical filters for spectroscopy, imaging, and laser applications. Our bandpass and IR cut-off filters ensure superior performance, available in ......
Fluorescence Microscopy Filters for High-Precision Imag
High-precision fluorescence microscopy filters enhance imaging clarity. Our custom and stock optical filters ensure optimal wavelength control, meeting global s......
OPTOStokes offers high-quality optical filters (bandpass, longpass, ND, fluorescence). OEM solutions, in-stock options & custom designs—precision for global clients.
Products
Stay updated with OPTOStokes’ optical filter news: industry insights, company updates & tech trends. Access latest resources for optical solutions.
News
08-24, 2026
What are the main wavelength bands of time-resolved fluorescence filters?
Premium TRF bandpass filters & dichroic beamsplitters for Europium assays. High OD6 blockage & 95% transmission. In-stock & custom options from OPTO......
Details
08-23, 2026
Introduction: The Architecture of Precision XYZ Color Sensors
Discover the working principles of XYZ color sensors and CIE 1931 tristimulus filters. Learn how X, Y, and Z optical filters enable precision colorimetric calib......
Details
08-24, 2026
Overcoming Laser Performance Bottlenecks with BP671 Filters
Discover how the BP671 narrow bandpass filter optimizes 671nm narrow-linewidth lasers. Achieve >85% transmittance and OD>4 blocking for precision optics....
Details
08-20, 2026
Is Higher Peak Transmission Always Better? The Optical Trade-offs Behind High Transmittance
High peak transmission isn't always best. Discover the physics of optical filter trade-offs between transmittance, blocking depth, and angle sensitivity....
Details
