2. Processing: by Molding, Grinding, Polishing,
3. Surface quality: optical surface quality and well controlled tolerance
4. Inside quality: clear and transparent, no mold marks, no inside bubble and dirts,
5. Function: Guide of 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 lens
6. Application: Lighting system, Electronics, Electrical apparatus, Industries, e.g. Lamp cover, Lamp shade, Stage lens, LED lens, Reflector lens, Sight lens, Front lens, Refractor, Molded lens, Spot lens, Lighting shade, Lighting cover