Calcium Fluoride Lenses Circular Fluoride Windows are applied to isolate different physical environments while allowing light pass. When selecting Optical windows,please consider materials, transmission, scattering, parallelism and resistance to certain environment. A-Star Optics produce a wide range of optical lenses with the best grade materail of BK7,fused silica, sapphire, CaF2 and MgF2, other materials ( like Ge, […]