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1200nm-6000nm Silicon Anti-reflective Windows Infrared
1200nm-6000nm silicon anti-reflective windows infrared is designed to transmit from NIR to MWIR spectrum. Coligh manufactures IR protective windows.
- Anti reflective coating
- Broad band high transmission range 1200-6000nm
- Silicon substrate
1200nm to 6000nm Broadband Silicon IR Windows with AR Coating Description
The 1200nm-6000nm broadband silicon-based infrared window is an ultra-wideband high-performance optical window covering near infrared (NIR) to mid-infrared (MWIR). This filter produced by Coligh uses a high-purity single-crystal silicon substrate and combines multi-layer dielectric anti-reflection (AR) coating technology. It is a core component to improve the energy efficiency of infrared optical systems.
- This window covers the range of 1200nm-6000nm, and is suitable for short-wave infrared (SWIR), mid-wave infrared (MWIR) and some long-wave infrared (LWIR) applications.
- The transmittance is greater than 90% in the range of 1200-6000nm, significantly reducing energy loss.
- We use silicon as the substrate. Silicon has no intrinsic absorption in the 1-6μm band and is suitable for high-power laser transmission.
1200nm-6000nm Silicon Anti-reflective Windows Infrared Datasheet
| Parameter | Specification |
| Substrate Material | Silicon |
| Wavelength Range | 1200-6000nm (SWIR-MWIR-FIR） |
| Coating Type | Anti-Reflective (AR) |
| Average Transmittance | ≥ 90% (within 1200-6000nm range) |
| Surface Quality | 60-40, 40-20 |
| Coating Method | Ion-assisted deposition / Electron-beam evaporation |
| Custom Options | Available upon request (wavelength tuning, dual-side) |
1200nm-6000nm Silicon Anti-reflective Windows Infrared Applications
Gas detection
The absorption peaks of CH₄ in industrial waste gas are at 3.3μm and CO₂ at 4.3μm. These gases need to be detected by infrared spectroscopy, but the traditional window reflection noise masks the weak absorption signal. This filter can improve the transmittance of the optical path, reduce the detector noise, and enhance the spectral resolution.
Aerospace
Satellite infrared payloads need to work stably for a long time in extreme temperature and radiation environments. This silicon-based AR coating resists thermal expansion mismatch and ensures stable optical performance in a wide temperature range. It can extend the service life of satellite cameras
Industrial process monitoring
High-temperature resistant windows are required for temperature monitoring inside the furnace, but ordinary glass softens or breaks at >500℃. This silicon window is resistant to high temperatures (>500℃) and transmits infrared light, transmitting furnace thermal radiation signals in real time.
