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.
| 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.
