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2025/220nm Middle Infared Bandpass Filter
2025nm Middle Infared Bandpass Filter FWHM 110nm is an narrow bandpass filter to transmit light centered 2025nm and FWHM 110nm. Coligh manufactures IR bandpass filter up to 30μm.
- Center wavelength 2025nm
- FWHM 110nm
- OD3 Blocking depth
- Transmission above 90%
- Single Substrate bandpass interference filter
Capability:
- Custom center wavelengths from 2.0μm to 30μm
- Narrow band or wide band
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2025nm Infared Interference Bandpass Filter Bandwidth 220nm Description
2025nm Infared Bandpass Filter FWHM 110nm is a high-performance mid-infrared bandpass filter.
- The central wavelength is 2025+/-10nm, and the passband range covers 2025+/-110nm. It supports multi-component synchronous detection of mixed gas analysis or wide-spectrum thermal radiation acquisition to improve data acquisition efficiency.
- The transmittance in the target band is greater than or equal to 90%, which is suitable for trace gas detection or long-distance infrared imaging.
- The cutoff depth OD3 outside the passband is 200-3000nm, with excellent stray light cutoff capability.
- We use infrared substrates such as zinc selenide, calcium fluoride, silicon, and sapphire to adapt to different infrared optical systems
2025nm Infared Bandpass Filter Bandwidth 220nm Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 2025 nm ± 10 nm |
| Transmission bandwidth | 2025+/-110nm |
| 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 |
2025nm Infared Bandpass Filter Bandwidth 220nmApplications
- Industrial gas detection
The infrared band near 2025nm can be used to detect methane and propane hydrocarbons, and the bandwidth of 220nm can cover multiple absorption peaks or wide spectrum signals. This mid-infrared filter can isolate the absorption band of the target gas, suppress the interference of ambient light and other wavelengths, and improve the sensor signal-to-noise ratio. Realize fast, multi-gas synchronous detection and improve the efficiency of industrial safety monitoring. - Agricultural food component analysis
1915-2135nm is a common band for analyzing organic moisture, fat, and protein, and the wide bandwidth can cover the absorption characteristics of multiple components. This filter can screen specific bands in the spectrophotometer to ensure accurate measurement of the target component content. - Flame and combustion monitoring
The radiation spectrum of the combustion products CO₂ and H₂O has characteristic emission in the near infrared, and the wide bandwidth can capture the multi-band signals of the dynamic combustion process. This filter can filter out non-flame radiation and enhance the contrast of the flame signal.
