905nm Bandpass Filter FWHM 15nm
905nm Bandpass Filter FWHM 15nm is an optical narrow bandpass filter to transmit 905nm and blocking other wavelength. Coligh manufactures EUV to 30000nm optical filter.
- Center Wavelength 905nm
- FWHM 15nm
- Tp>90%
- OD4 deep blocking depth
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905nm Optical Bandpass Filter FWHM 15nm Description
905nm Bandpass Filter is a narrowband filter designed for the near-infrared (NIR) spectral range.
- The central wavelength is 905nm ±2nm, which strictly matches the emission wavelength of LiDAR and semiconductor lasers to ensure efficient signal capture.
- Half bandwidth 15+/-2nm, transmittance greater than or equal to 90% in the passband, maximally retaining the target wavelength signal energy and improving detector sensitivity
- It has an ultra-long cutoff band, with a cutoff depth of OD4 in the range of 200-1700nm, effectively suppressing the influence of sunlight and ambient light and improving the signal-to-noise ratio
- We use hard interference coating technology, with dense film layers and strong adhesion, and provide a variety of substrates to choose from, such as K9, sapphire, and colored absorption glass to meet the mechanical strength and light transmission requirements of different scenarios.
905nm Bandpass Filter FWHM 15nm Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 905 nm ± 2 nm |
| Full Width at Half Maximum (FWHM) | 15 nm ± 2nm |
| 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 | 905/30nm, 905/40nm, 905/50nm, 905/70nm |
| 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 |
905nm Bandpass Filter FWHM 15nm Applications
- LiDAR for autonomous driving
905nm is one of the mainstream working wavelengths of LiDAR. In obstacle detection and 3D modeling, 905/15nm filters can be used at the receiving end to accurately separate 905nm laser echo signals and suppress interference from sunlight and other ambient light. - Near-infrared fluorescence imaging
In near-infrared fluorescence imaging, 905/15nm narrowband filters combined with 905nm excitation light sources can be used to separate the fluorescence signals of biomarkers and improve the contrast of tumor or vascular imaging. - Industrial sensors
This filter can be used for high-temperature process monitoring and can withstand a temperature range of -40℃~85℃. It is suitable for laser ranging or thermal radiation filtering in high-temperature environments such as metallurgy and glass manufacturing. - Security
The 905/15nm filter can work with infrared fill light to enhance the imaging capability of CCD/CMOS cameras in dark light while avoiding visible light pollution.
