ICC provide Si, Ge, ZnSe, CaF2, BaF2, MgF2, BK7, Quartz,Sapphire Windows and Lenses. Grow optical fluoride crystals:CaF2 BaF2 MgF2 LiF &Silicon Produce Optical components:Optical windows ,lens,prisms,etc Other working materials:Ge/ZnSe/ZnS/Quartz/Optical Glass,etc