ZnSe optical components
Zinc selenide (ZnSe) is the most popular material for infrared applications. Very wide transmission range covering 0.6 - 22 µm and high quality material grown by CVD technique (Chemical Vapor Deposition) make ZnSe a good material for manufacturing optical components (windows, mirrors, lenses) for high power IR lasers.
Material properties:
- crystal type: cubic
- density: 5.27 g/cm3
- refractive index @ 8-13 µm: n = 2.417 - 2.385
- refractive index @ 10.6 µm: n = 2.403
Specification of elements:
- surface quality: 40-20 scratch & dig (MIL-PRF-13830B)
- diameter tolerance: +0.0 -0.13 mm
- diameter thickness: ±0.1 mm
- focal length tolerance: ±2%
- coating: both sides AR @ 10.6 µm, R ≤ 0.5% per surface