N-BK7 round drilled windows
Sapphire round drilled windows
Fused Silica(UVFS) round drilled windows
Zinc Selenide (ZnSe) round drilled windows
Zinc Sulfide (ZnS)round drilled windows
Germanium(Ge) round drilled windows
Silicon(Si) round drilled windows
Lithium Fluoride(LiF) round drilled windows
Magnesium Fluoride(MgF2) round drilled windows
Barium Fluoride(BaF2) round drilled windows
Calcium fluoride (CaF2)round drilled windows