Detailed Product Description Optical MirrorDetailed Product Description We make lenses with diameter from 1.0mm to 300mm by optical glass or optical crystals, such as BK7, fused silica, CaF2. Our standard lens has the following specifications: Optical SpecificationMaterialBK7,SF8,SF6 etc or specified by customerDesign index1.5183+/-0.0005 at 546.1nmFocus Length Tolerance+/-2%~0.5%Diameter ...