Zinc selenide has low absorbability to infrared wavelength and can transmit visible light. It is the first choice for making infrared lens, window, output coupling mirror and expanding beam mirror. In high-power application, it is very critical to strictly control the material's absorption and internal defects.For this purpose, not only the optical polishing technology with minimal damage to the optical elements, but also the optical film coating with the highest quality.The absorption rate of the material was tested by the vacuum thermal measurement technology of CO2 laser.The quality assurance department will provide the test as required by the customer and certify the specified optical components.
Zinc selenide optical elements are usually polished between 5 and 300mm in diameter.The optical element with diameter less than 300mm and thickness less than 25mm can be manufactured according to customer demand.Zinc selenide is not hygroscopic and chemically stable (unless treated with a strong acid).You can safely use this material in most industrial, field, and laboratory environments.
Within the material, the refractive index changes of prismatic zinc selenide in all planes perpendicular to the growth direction are minimal, as are in other directions.The refractive index change measured using light with a wavelength of 0.6328 microns was less than 3ppm and independent of direction.Prism - grade zinc selenide is often used in thermal imaging systems.Additional orders will be required if materials with thickness greater than 2.50 "are required.When the wavelength is 0.6328?At m, the refractive index change in all directions is less than 3ppm and the consistent optical property (irrespective of direction) thickness is up to 2.50".