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2320/50nm Infrared Bandpass Transmission Lens Filter
2320/50nm Infrared Bandpass Transmission Lens Filter is designed to transmit 2320nm and bandwidth 50nm. Coligh manufactures high quality infrared bandpass filter
- Center wavelength 2320nm
- Bandwidth 50nm
- 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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2320/50nm Infrared Narrow Bandpass Transmission Lens Filter Description
2320/50nm infrared bandpass transmission lens filter is a high-precision optical component based on interference coating technology, designed for narrowband signal extraction and noise suppression in the mid-infrared band (2295nm~2345nm).
- Center wavelength 2320+/-10nm, high transmittance within 2320+/-25nm range, transmittance greater than or equal to 90%, it delivers high efficiency and precision in infrared detection and analysis systems.
- Out-of-band cutoff depth OD3, , ensuring strong rejection of out-of-band wavelengths.
- This filter is part of a broader product line that supports custom center wavelengths from 2.0μm to 30μm.
2320/50nm Infrared Bandpass Transmission Lens Filter Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 2320 nm ± 10 nm |
| Transmission bandwidth | 2320+/-25nm |
| 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 |
2320/50nm Infrared Bandpass Transmission Lens Filter Applications
- Methane leakage monitoring in oil and gas fields
Methane (CH₄) has a strong absorption peak near 2320nm, and a 50nm bandwidth can cover its main absorption line and exclude water vapor interference. This filter can
Filter out infrared radiation of non-methane gases, improve the detection signal-to-noise ratio of drone-mounted or fixed sensors, and realize real-time positioning and quantitative analysis of wide-area methane leakage in oil and gas fields - Industrial heat treatment monitoring
When metal materials are at high temperatures >800℃, the peak of thermal radiation is near 2320nm, and the temperature distribution can be inferred. The 2320/50nm infrared filter can shield other wavelengths in the furnace to accurately extract the target thermal signal. Achieve closed-loop temperature control of the heat treatment process and improve the performance consistency of metal parts. - Medical endoscopic imaging
The difference in thermal radiation of human tissue in the 2320nm band can identify inflammation or tumor boundaries, and the wavelength has an appropriate penetration depth. This filter can be used with an infrared camera to generate high-contrast thermal distribution images to avoid interference from ambient light. This can enable real-time tissue pathology judgment during minimally invasive surgery and improve surgical accuracy.
