Zinc selenide materials are used to make all kinds of convex and convex lenses, convex and concave crescent cutting lenses, gold-plated reflectors, circularly polarized mirrors, expanding beam lenses, plane-field lenses, medium-infrared lenses, far-infrared 10.6Um/CO2 power lasers, etc.
Zinc selenide material is a kind of yellow transparent polycrystalline material, the crystalline particle size is about 70 oxidation m, the transmittance range is 0.5-15 oxidation m, the synthesis by chemical vapor deposition (CVD) method basically does not have the impurity absorption, the scattering loss is extremely low, therefore, also often used in the infrared material.Since the absorption of 10.6 photometric m is very small, it is the preferred material for the fabrication of optical devices in high-power CO2 laser systems.In addition, it is a widely used material in different optical systems in the whole transmission band.
Zinc selenide material has a high bearing capacity to thermal shock, making it the best optical material in high power CO2 laser system.Hardness is only 2/3 of multispectral grade ZnS, the material is soft and easy to generate scratches, and the refractive index of the material is relatively large, so it is necessary to coat the high-hardness anti-reflection film on its surface to protect it and obtain a higher transmittance.In its usual spectrum range, scattering is very low.When used as a high-power laser device, it is necessary to strictly control the material's body absorption and internal structure defects, and adopt the minimum damage polishing technology and the highest optical quality coating process.