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.
| 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.
