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2165/40nm Infrared Optical Bandpass Filter
2165nm Infrared Optical Bandpass Filter Bandwidth 40nm precisely transmit wavelengths from 2145nm to 2185nm. Coligh manufactures 2.0μm to 30μm infared filtes.
- Center wavelength 2165nm
- Bandwidth 110nm
- OD3 Blocking depth
- Transmission above 90%
- Single Substrate bandpass interference filter
- Custom center wavelengths from 2.0μm to 30μm
- Narrow band or wide band filter
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2165nm Infrared Optical Narrow Bandpass Filter Bandwidth 40nm Description
2165nm Infrared Optical Bandpass Filter Bandwidth 40nm is an infared optical filter designed for sensor detection.
- Central wavelength 2165+/-10nm, high transmittance within 2145nm to 2185nm, cutoff depth outside the passband OD3 within 200-3000nm range, narrowband design can effectively isolate the target wavelength 2165nm signal, and is also suitable for high-precision detection of single gas, such as CO₂, NH₃ absorption peak near 2165nm, to avoid cross interference
- Transmittance is greater than or equal to 90%, and optical loss is extremely low. Maximize signal transmission efficiency and ensure efficient capture of weak infrared light signals.
- We have a high degree of customization capabilities, and both narrowband filters and broadband infrared filters in the range of 2.0-30μm can be customized.
- At the same time, we have a large inventory of infrared bandpass filters for sample testing.
2165nm Infrared Optical Bandpass Filter Bandwidth 40nm Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 2165 nm ± 10 nm |
| Transmission bandwidth | 2165+/-20nm |
| Peak Transmission | >=90% |
| Blocking Range | 200-3000nm |
| Optical Density (Blocking) | OD3 |
| Substrate Material | White Glass，Sapphire，Silicon ， Fused Silica , Zinc Selenide or other IR-grade substrate |
| Surface Quality | 80-50, 60-40, 40-20 scratch-dig (per MIL-PRF-13830B) |
| Clear Aperture | ≥ 90% of diameter |
| Typical Thickness | 0.5+/-0.1mm, 1.0+/-0.1mm |
| Typical Size | Dia25mm, Dia25.4mm, Dia50mm, Dia100mmm |
| Coating Type | Hard-coated dielectric |
| Environmental Durability | MIL-STD-810 compliant |
| Custom Capability | Up to 30000nm narrow or wide band bandpass filter |
2165nm Infrared Optical Bandpass Filter Bandwidth 40nm Applications
- Petroleum oil monitoring
The hydrocarbon components of petroleum products such as diesel and lubricating oil have characteristic absorption peaks near 2165nm, and the 40nm bandwidth can cover the vibration spectrum of specific chemical bonds (such as C-H bonds). The 2165nm Infrared Optical Bandpass Filter can suppress spectral interference in oil products during monitoring, monitor oil purity in real time, and prevent inferior oil from entering the market. - Gas Leakage Imaging
When methane leaks, its infrared radiation or absorption characteristics are significant near 2165nm. . Narrowband filters can capture weak gas signals and separate them from background thermal radiation. The 2165nm Infrared Optical Bandpass Filter can be used with infrared cameras to allow only gas characteristic wavelengths to pass through, generating high-contrast gas leakage images. Realize long-distance, visual gas leakage monitoring - Analysis of electrolytes for new energy batteries
The electrolyte component of lithium-ion batteries, LiPF₆, has specific absorption characteristics at 2165nm, and the 40nm bandwidth can accurately detect its concentration changes. This filter can dynamically monitor the spectral characteristics of electrolyte decomposition products during battery charging and discharging, providing early warning of battery electrolyte degradation or thermal runaway risks.
