... surface quality and transimission4) AR coating of Optical glass lens: multipe layer, its transmission up to 95% and more 5) ... ) Series of Optical glass lens:Including Fresnel lens,Plano lens, Bi convex lens, Bi concave lens,Prism, Cylindrical lens, Ball lens, Spherical lens, Aspheric lens, Meniscus lens Optical SpecificationMaterialBK7,B270or specified ...