Laser Ranging Filters are precision bandpass filters engineered for laser distance measurement, LiDAR, and optical ranging systems. These filters selectively transmit the operating laser wavelength while effectively blocking background radiation, significantly improving signal-to-noise ratio (SNR) and ranging accuracy.
Designed to support common ranging wavelengths from the visible to near-infrared, SOT’s filters are widely used in autonomous vehicles, industrial metrology, geophysical surveying, environmental monitoring, defense, and aerospace systems. Advanced coating technology ensures high optical clarity, excellent durability, and stable performance even in harsh outdoor or industrial environments.
Key Features
- Optimized for Laser Ranging & LiDAR – Designed for high-precision distance measurement and optical ranging systems
- Wide Wavelength Compatibility – Standard options at 520, 635, 650, 808, 905, and 940 nm
- High Transmission Efficiency – Tave ≥ 90% to maximize received signal strength
- Strong Out-of-Band Blocking – OD ≥ 3 to suppress ambient light and noise
- Durable Hard Coatings – Scratch-resistant, environmentally stable coatings for long-term reliability
- Fully Customizable – CWL, FWHM, OD, size, and substrate tailored to your system
Spectrum Transmission
Standard transmission curves are optimized for narrow laser lines used in ranging and LiDAR systems, delivering high in-band transmission with steep spectral edges.
If standard models do not meet your requirements, custom transmission curves can be developed based on your laser wavelength, detector sensitivity, and ambient light conditions.
Coating Parameters
| Parameter | Value |
|---|---|
| Transmittance | T ≥ 90%, T ≥ 95% (Customization available upon request) |
| Center Wavelength (CWL) | Typical wavelengths: 520 nm, 635 nm, 650 nm, 808 nm, 905 nm, 940 nm (selection based on customer’s requirements) |
| Bandwidth (FWHM) | 10–150 nm (selection based on customer’s requirements) |
| Optical Density (OD) | OD ≥ 3, OD ≥ 4 (customizable) |
| Dimension | Customizable |
| Thickness | Convention: 0.33 mm, 0.55 mm, 0.7 mm, 1.0 mm, 1.1 mm (customizable) |
| Note | For more in-stock models, please feel free to contact us. |
Typical Laser Ranging Filter
| Model | Center Wavelength (nm) | Bandwidth (nm) | Model | Center Wavelength (nm) | Bandwidth (nm) |
|---|---|---|---|---|---|
| NH-BP520 | 520 ± 5 | 30–60 | NH-BP808 | 808 ± 5 | 30–60 |
| NH-BP635 | 635 ± 5 | 30–80 | NH-BP905 | 905 ± 5 | 30–60 |
| NH-BP650 | 650 ± 5 | 30–120 | NH-BP940 | 940 ± 5 | 30–60 |
Applications
- LiDAR Systems – Autonomous vehicles, robotics, and intelligent transportation
- Geophysical Surveying – Terrain mapping and environmental analysis
- Industrial Metrology – Distance measurement, alignment, and inspection
- Environmental Monitoring – Vegetation analysis, pollution tracking, forestry LiDAR
- Defense & Security – Surveillance, target detection, and reconnaissance
- Aerospace – Navigation, altitude measurement, and ranging systems
Need a custom laser ranging filter?
Contact us with your laser wavelength, detector type, bandwidth requirement, OD target, and operating environment for a tailored solution.