Products Description
BP808nm laser radar narrowband filter with 13nm bandwidth and OD2 cut-off depth
This BP808nm narrowband filter is designed specifically for laser radar and laser ranging systems, with a peak transmittance of over 90% in the 806-810nm passband. It also achieves a depth cutoff of OD>2 in the 350-1100nm wide band, greatly suppressing environmental noise interference and improving the signal-to-noise ratio and measurement stability of ranging signals.
Technical specifications
| Parameter item | Specification indicators | Remarks |
|---|---|---|
| Center wavelength | 808±2nm | Actual measurement under normal incidence conditions |
| Passband range | 806-810nm | Transmittance within the passband>90% |
| Half width at half maximum (FWHM) | 13±2nm | Actual finished product bandwidth is 11-15nm |
| Cut off depth | 350-1100nm OD＞2 | Maximum out of band transmittance ≤ 1% |
| Lens thickness | 2.0mm | The thickness tolerance of the substrate can be adjusted as needed |
| Incident angle | Nominal 0 ° normal incidence | Tilting installation will cause the center wavelength to shift towards shorter wavelengths |
Selection example: Signal purification scenario for laser ranging system
In long-distance laser ranging conditions, the core requirement of the system is to filter out environmental stray light such as sunlight and indoor lighting as much as possible, to avoid background noise drowning out the weak ranging signal returned. This 13nm narrow bandwidth BP808nm filter has a passband width that precisely covers the emission spectrum of the 808nm ranging laser. It ensures efficient transmission of laser signals in the target wavelength band and suppresses the majority of ambient noise outside the passband to below 1%, effectively improving the system's ranging signal-to-noise ratio and reducing measurement errors in strong light environments. When selecting, it is necessary to confirm the incident angle of the beam at the receiving end of the system in advance, reserve sufficient wavelength offset margin, and avoid the return laser falling on the edge of the passband.
Customization and supply support
Standard circular and square lenses are available in stock, and rectangular and irregular contours can be customized according to drawings. The matching installation of the card ring can adapt to the fixture structure of most radars and rangefinders. The center wavelength, bandwidth, cutoff depth, and lens thickness can be adjusted according to project requirements, and customized coating and precision machining services can be provided for non-standard specifications.
Consultation and Inquiry
If your laser radar or ranging system has problems with range jumping and high background noise in strong light environments, you can provide actual laser wavelength, maximum incident angle of the system, and installation size drawings, and contact our optical engineers to assist in verifying passband compatibility. Consultation email: sales@optofilters.com
Tags: 808nm narrowband filter lidar filter laser ranging filter