915/37nm Bandpass Filter For 915nm Laser
915/37nm Bandpass Filter is an optical filter optimize for 915nm laser and detector. Coligh manufactures EUV to 30000nm bandpass filter.
- Center Wavelength 915nm
- FWHM 37nm
- Tp>90%
- OD4 deep blocking depth
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915/37nm Bandpass Filter For 915nm Laser Descrition
915/37nm Bandpass Filter is a high-performance optical filter optimized for 915nm laser detectors.
- The central wavelength is 915+/-2nm, which strictly matches the emission wavelength of the 915nm laser to ensure efficient signal capture.
- The half-bandwidth is 37+/-4nm, covering the wavelength deviation caused by temperature drift or aging of the laser to avoid signal loss.
- The transmittance is greater than or equal to 90% in the passband, and there is an ultra-wideband cutoff depth of 200-1700nm outside the passband. The cutoff depth OD4 significantly suppresses background light interference
915/37nm Bandpass Filter For 915nm Laser Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 915 nm ± 2 nm |
| Full Width at Half Maximum (FWHM) | 37 nm ± 4nm |
| Peak Transmission | ≥ 90% |
| Blocking Range | 200 – 1700nm |
| Optical Density (OD) | OD4 |
| Angle of Incidence (AOI) | 0° |
| Clear Aperture | >90% of the diameter |
| Substrate Material | UV Fused Silica, K9,sapphire, Other optical glass |
| Size | Ø12.7mm, Ø25.4mm,Ø50.8mmor customizable |
| Environmental Durability | Compliant with MIL-STD-810G |
| Other avaliable wavelength | Customizable |
| Custom Option | EUV to 30,000nm |
| Filter Type | Multilayer Interference Bandpass Filter |
| Coating Technology | Ion-Assisted Deposition (IAD), Hard coated |
| Surface Quality | 80-50, 60-40, 40-20 (per MIL-PRF-13830B |
915/37nm Bandpass Filter For 915nm Laser Applications
- Laser ranging
Laser ranging systems usually use near-infrared lasers such as 915nm as signal sources. The 915/37nm bandpass filter can only allow the laser band to pass through, which is used to shield ambient light and improve the detector’s response efficiency to target signals - Multispectral imaging
915nm is located in the area where the vegetation reflectivity changes significantly. The 915/37nm filter can be used in multispectral imaging equipment carried on drones or satellites to identify near-infrared light reflected by crops and accurately collect crop reflectance spectral data - Machine vision
Plastics, silicon wafers, and glass show different reflection or transmission characteristics in the near-infrared band. The 915/37nm filter can better distinguish defects and improve the imaging contrast of specific materials
