... -1/10F at 633 The windows can be applied on projection system, imaging system, Optical measurement system.Material:Optical glass such as series ... flint glass, UVFS, IRFS and optical crystal material such as: CaF2,MgF2, ZnSe, Mono Ge, Mono Si, SapphireDia. Tolerance ... : +/-0.001 inchThickness tolerance: +/-0.001 inchS/D: 20/10 CaF2, MgF2, ZnSe, ZnS, Ge, Si etc. 10/5 BK7, FS ...