Laser Protective Glasses
Laser protective glass (which is also called protective windows, protective filters or welding protective windows) saves your high-priced laser optics from material splashes in the course of the cutting or welding process. It also goes by the name “final window“, because it is the last optics in front of the work piece (like an Al sheet) that has to be processed. Laser protective windows for solid state lasers are often made of quartz glass since the material offers a high transmission in the UV range as well as in the IR range, a minimal absorption and a high temperature shock resistance. But optical borosilicate glasses like BK7 and HK9L are suitable for lower laser powers as well. CO2 lasers require zinc selenide glasses. All substrates are finished with an antireflective coating (short: AR-coating) to increase the transmission respectively to lower the reflection.
Product information for ZnSe