LiDAR wavelength selection
Common LiDAR wavelengths include 850nm, 905nm, 940nm, and 1550nm. Match the filter to the emitter line, detector response, and ambient-light rejection target.
LiDAR Optical Filters for 905nm and 1550nm
Compare LiDAR bandpass filters for common emitter wavelengths including 850nm, 905nm, 940nm, and 1550nm. Use the tables to balance signal throughput, ambient light rejection, and mechanical fit.
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Selected Models
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How to Choose
Match the filter CWL to the laser or emitter wavelength, then choose FWHM based on source tolerance and ambient light rejection. Confirm AOI, temperature stability, blocking depth, aperture size, and sensor package constraints.
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LiDAR Application Filters
The primary wavelengths for LiDAR are 905nm and 1550nm, with 850nm and 940nm also used in select applications. OPTOStokes LiDAR bandpass filters provide high transmittance and deep out-of-band blocking for reliable distance measurement in autonomous vehicles, UAV navigation, and 3D mapping systems. Hard-coated filters in this section are intended to maintain stable performance across wide operating temperature ranges.
LiDAR Bandpass Filters
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| Model | CWL (nm) | FWHM (nm) | Transmittance | Optical Density | Note |
|---|---|---|---|---|---|
| STO-BP850/10 | 850±2 | T≥90% | 10±2 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP850/30 | 850±3 | T≥90% | 30±3 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP850/50 | 850±5 | T≥90% | 50±3 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP905/10 | 905±2 | T≥90% | 10±2 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP905/30 | 905±3 | T≥90% | 30±3 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP905/50 | 905±5 | T≥90% | 50±3 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP940/10 | 940±2 | T≥90% | 10±2 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP940/30 | 940±3 | T≥90% | 30±3 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP940/50 | 940±5 | T≥90% | 50±3 | OD≥3@300-1100 | Other parameters can be customized |
| STO-BP1550/10 | 1550±2 | T≥90% | 10±2 | ODave≥4@600-2000 | Other parameters can be customized |
| STO-BP1550/30 | 1550±3 | T≥90% | 30±3 | ODave≥4@200-1700 | Other parameters can be customized |
| STO-BP1550/50 | 1550±5 | T≥90% | 50±3 | ODave≥4@200-1700 | Other parameters can be customized |
LiDAR Reflectors
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| Model | AOI | Wavelength (nm) | Reflectivity | Coating Type | Note |
|---|---|---|---|---|---|
| 850nm-reflector | 45-deg | 800-900 | Rav>99% | Hard coating | Other parameters can be customized |
| 905nm-reflector | 45-deg | 890-920 | Rave>99% | Hard coating | Other parameters can be customized |
| 940nm-reflector | 45-deg | 900-980 | Rave>99% | Hard coating | Other parameters can be customized |
| 1550nm-reflector | 45-deg | 1500-1600 | Rave>99% | Hard coating | Other parameters can be customized |
LiDAR Optical Windows
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| Model | AOI | Wavelength (nm) | Transmittance | Coating Type | Note |
|---|---|---|---|---|---|
| 850nm-window glass | 0 | 800-900 | Tave≥99% | Hard coating | |
| 905nm-window glass | 0 | 890-920 | Tave≥99% | Hard coating | |
| 940nm-window glass | 0 | 900-980 | Tave≥99% | Hard coating | |
| 1550nm-window glass | 0 | 1500-1600 | Tave≥99% | Hard coating |
Related Engineering Notes
Blocking for outdoor use
Outdoor LiDAR often needs strong solar background suppression. Check the blocking range around visible and NIR background, not only peak transmission.
FWHM and temperature drift
A narrow passband improves rejection but leaves less room for source drift, angle shift, and temperature variation.
FAQ
Which wavelengths are common for LiDAR filters?
Common LiDAR wavelengths include 850nm, 905nm, 940nm, and 1550nm depending on the emitter, detector, and safety requirements.
Why is blocking important in LiDAR?
Strong out-of-band blocking reduces ambient sunlight and background noise, improving signal-to-noise ratio.
Can LiDAR filters be supplied for compact modules?
Yes. Custom sizes, thicknesses, and coating targets can be produced for compact sensor modules and OEM assemblies.
Quality & Compliance
Documentation-ready optical filter supply
For OEM programs, laboratory instruments, and industrial systems, OPTOStokes keeps quality, material compliance, and engineering support visible from the start of supplier evaluation.
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Process control, inspection records, and repeatable coating workflows for production optical components.
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Compliance documentation can be prepared for qualified projects and regulated supply chains.
Factory-direct
Custom coating and dimensions
Wavelength, FWHM, substrate, AOI, size, and mounting requirements can be reviewed with engineering.
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Quote and data review
Share target wavelength, blocking level, transmittance, and drawing requirements for a focused quote.
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