... glass, Plastic glass, Optical glass,Crystal glass2. Processing: by Molding, Grinding, Polishing3. Surface quality: optical surface quality and well controlled tolerance4 ... the light beams e.g. Fresnel lens, Plano lens, Bi convex lens, Bi concave lens, Prism, Cylindrical lens, Ball lens, Spherical lens, Aspheric lens, Meniscus lens6. Application: Lighting system ...