optical plano window is a parallel plane plate with transparent surface, excellent properties and high transmittance. It is usually used as a protective film for electronic sensors or detectors in external environments. The optical window is made of imported quartz with excellent optical, thermal and mechanical properties, high temperature resistance and laser resistance. The plano optical window can also be plated with double - sided anti-reflection film to increase the transmittance.Made in China Oem Ar/ar Ar/dlc 8-14um Standard Infrared Ge Windows Optical Germanium Window