... 1) Materila for Optical glass lens: BK-7,B2702) Techniques for Optical glass lens: by Molding, Grinding, Polishing, ... quality and transimission4) AR coating of Optical glass lens: multipe layer, its transmission up to 95% ... 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 ...