Custom Optical Component >> Optical Windows >> ZnSe Windows |
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ZnSe Windows |
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A clear yellow polycrystalline material, Chemically vapor deposited Zinc selenide is produced by synthesis from zinc vapour and H2Se gas, forming as sheets on graphite susceptors. |
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ZnSe provides exceptional performance like superior optical transmission in wide spectral range 0.5-15µm, extremely low bulk losses from scatter, high thermal resistance, chemically inert and non-hygroscopic, making it ideal material for protective optical windows used in thermal imaging equipment, forward looing infrared (FLIR), and medical systems. |
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ZnSe window is most suitable for the application of high power CO2 laser system due to its high resistance to thermal shock and low bulk absorption at 10.6 microns. |
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Because of high refractive index, ZnSe windows need to be coated with anti-reflection coating to improve transmission if high transmission is required. ZnSe is relatively soft material, making it scratches easily. The harder anti-reflection coating also serve to protect ZnSe window. |
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Besides Sapphire Windows, HYT Sapphire Optics has the capability to process precision ZnSe windows with sizes up to 250 mm diameter and 25 mm thickness to meet customer requirements. |
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Standard Specifications of ZnSe Windows |
- Diameter Tolerance: +0.0, -0.1mm
- Thickness Tolerance: ±0.02mm
- Clear Aperture : >90%
- Surface Accuracy: λ/4 @ 633nm
- Surface Quality S/D: 40/20
- Parallelism: <3 Arc minutes
- Bevel: <0.25mm X 45°
- Coating: Available upon request
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