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1530/20nm SWIR Narrow Band Filters
1530/20nm SWIR Narrow Band Filters are an optical filter with center wavelength with 1530nm and bandwidth 20nm. Coligh manufactures and custom filters from EUV to 30000nm.
- Center wavelength 1530nm
- Bandwith 20nm
- Transmission above 98%
- Deep blocking depth
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1530/20nm SWIR Narrow Band Filters Description
1530/20nm SWIR narrow band filter specially designed for SWIR spectrum.
- The central wavelength is 1530nm, which can accurately extract the 1530nm target signal and suppress stray light.
- The bandwidth is 20nm, and our precise control of the narrow bandwidth 20±2nm can meet the high sensitivity requirements of the SWIR band.
- The transmittance>=98% retains the signal intensity to the maximum extent. The cutoff depth at 800-1750nm is OD3, and the average cutoff depth of the whole band is OD2.
- We use fused quartz to produce this filter, assisted by ion beam assisted deposition (IAD) technology, the film has strong adhesion, resistance to moisture and heat, and resistance to wear.
We provide flexible customization services, any size, bandwidth, and central wavelength within EUV-30000nm can be customized
1530/20nm SWIR Narrow Band Filters Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 1530 ± 3 nm |
| Bandwidth (FWHM) | 20 ± 3 nm |
| Transmission (T) | ≥ 98% |
| Blocking Depth (OD) | Tave ≤ 1% @ 300-2000 nm T≤0.0 1% @800-1750 |
| Substrate | Fused Silica |
| Dimensions | Standard Diameter: 12.5 mm, 25 mm, 50 mm, 59 mm, or custom size, large size filter custom acceptable. |
| Thickness: 0.3 mm, 0.5 mm, 1.0 mm, 2 mm, 3 mm (customizable) | |
| Surface Quality | 80/50, 60/40 |
| Incident Angle | 0° |
1530/20nm SWIR Narrow Band Filters Filter Applications
1530/20nm bandpass filter can be used in the following fields:
- Optical communication
1530nm is a key sub-band. 1530nm filter can be used in dense wavelength division multiplexing (DWDM) system to isolate channel crosstalk and reduce bit error rate - Gas detection
The central wavelength of 1530/20nm filter is 1530nm, which can accurately extract gas absorption peaks near 1530nm (such as CH₄, H₂O) to improve detection sensitivity. - Thermal imaging and night vision
1530nm filter can suppress the interference of visible light and enhance the imaging contrast at night or in haze environment.
