Precision NIR Longpass Filter
The OPTOStokes LP940 is a high-performance longpass filter engineered to optimize signal-to-noise ratios in near-infrared (NIR) systems. By providing steep transition slopes and high average transmission (> 90%) from 940nm to 1100nm, this filter effectively isolates critical signals while suppressing unwanted visible light interference.
Technical Specifications
| Parameter | Specification |
|---|---|
| Cut-on Wavelength | 940nm |
| Transmission Range | 940nm to 1100nm |
| Transmittance | Average > 90% |
| Blocking Range | 350nm to 925nm |
| Blocking Level | T < 1% |
| Thickness | 1.1mm |
| Surface Quality | 60/40 |
| Product ID | 21102573 |
Key Applications
Our LP940 filters are optimized for industrial and scientific environments requiring precise NIR imaging and detection:
- LIDAR & Range Finding: Enhances 940nm laser detection by filtering out solar background noise and visible artifacts.
- Machine Vision: Improves contrast in automated inspection systems utilizing IR LED illumination.
- Biometric Systems: Ideal for facial recognition and gesture sensing modules where high NIR sensitivity is required.
- IR Detector Protection: Serves as a robust IR window, protecting sensors from shorter wavelength saturation.
Customization & Services
At OPTOStokes, we offer rapid OEM services to meet specific project demands. Beyond the standard 1.1mm thickness, we provide custom sizing, CNC shaping, and various mounting ring options. Our high transmission coatings are designed for long-term stability in diverse operating environments.
Contact for Inquiry
Whether you require off-the-shelf prototypes or high-volume production, our engineering team ensures reliable delivery and technical support. Focus on your system’s performance and let us handle the optical precision.
Email your requirements to: sales@optofilters.com
