Our main products include lens made by : 1. various kinds of crystal materials, such as ZnSe, CaF2, Ge, Si, ZnS, BaF2, GaAs, MgF2, LiF, Copper Mirrors, Mo, Sapphires, Quartz, Ceramics , YAG, etc 2. various kinds of glasses material including crown glass, flint glass, lanthanum glass, etc.