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800-4000nm Antireflective Coatings Sapphire Window Filters
800-4000nm Antireflective Coatings Sapphire Window Filters is an broadband optical filter design for NIR to MIR. Coligh manufactures EUV to IR AR coating filters.
- Broadband anti-reflective coating 800-4000nm
- High transmittance
- Sapphire substrate
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800-4000nm Antireflective Coatings Sapphire Window Filters Description
800-4000nm Antireflective Coatings Sapphire Window Filters use high-purity sapphire as the substrate, combined with Coligh’s advanced coating process. Significantly improve the transmittance of specific bands
- Multi-layer film design for the 800-4000nm band, the transmittance is greater than or equal to 80%, effectively reducing light energy loss and improving the system signal-to-noise ratio.
- Using sapphire as the substrate, sapphire has natural wide-spectrum transmittance in the range of 0.15-5.5μm, suitable for infrared applications
800-4000nm Antireflective Coatings Sapphire Window Filters Datasheet
| Parameter | Specification |
| Substrate Material | Optical-Grade Sapphire (Al₂O₃) |
| Wavelength Range | 800 nm – 4000 nm |
| Coating Type | Anti-Reflective (AR) |
| Average Transmittance | ≥ 80% (within 800-4000 nm range) |
| Surface Quality | 60-40, 40-20 |
| Coating Method | Ion-assisted deposition / Electron-beam evaporation |
| Custom Options | Available upon request (wavelength tuning, dual-side) |
800-4000nm Antireflective Coatings Sapphire Window Filters Applications
- Infrared thermal imaging
Infrared thermal imaging systems need to efficiently capture weak thermal radiation signals in the near-infrared to mid-infrared bands. Ordinary optical materials have large reflection losses in this band and are easily affected by the environment. This filter can improve light transmittance, significantly reduce light signal loss, and enhance imaging contrast. , improve imaging clarity in low-light environments, and support long-distance target recognition. - Laser system
Laser processing (such as cutting, welding) or medical laser equipment needs to transmit high-energy lasers at wavelengths such as 1064nm and 2um in the near-infrared band. Traditional windows are prone to energy loss or coating ablation due to reflection. The sapphire substrate of this filter can withstand the continuous impact of high-power density lasers, and by increasing transmittance and reducing reflectivity, it can improve laser transmission efficiency. - Gas monitoring
Gas monitoring such as CO₂ and CH₄ relies on mid-infrared spectral absorption peaks, but traditional materials (such as CaF₂) are fragile and have insufficient anti-reflection properties. This filter can improve gas monitoring accuracy, and anti-reflection coatings reduce stray light interference and improve signal-to-noise ratio.
