As can be seen from the physical and chemical properties of zse materials, it is a good transmission line at 0.5 to 22 microns, covering the range of visible -- infrared band, and is an excellent material for all-weather optical devices.
Due to the sublimation of zinc selenide at 1000 degrees Celsius at atmospheric pressure, it can only be changed into melt at high temperature and pressure.
At present, zinc selenide used in the world as an optical material is actually divided into three forms: first, polycrystalline zinc selenide (or compact powder) formed at the end of selenide zinc powder through hot pressing is used as the transmission window of infrared thermal imaging and laser device;The second is to obtain znse thin films or wafers (polycrystalline or quasi-single crystal) by chemical vapor deposition (CVD) or epitaxial growth
Used as a blue light emitting device;At the end of the three is the selenide zinc powder preparation with sublimation method or other needles (branch) of single crystal (not a single acicular single crystal orientation pooling or LuanJing) used as blue light emitting device, the above three forms of zinc selenide material, or because of its refraction performance is not stable, or because of its light diameter is too small, cannot be used in high precision optical imaging system.
Modern military optical reconnaissance equipment has high precision, light and all-weather functions.Due to the limitation of basic materials, in order to achieve the all-weather observation goal, two sets of systems, visible and infrared imaging, have to be set up, making the device complex, huge and bulky.