1. Raw material: Borosilicate glass, Pyrex, Borofloat 2. Processing: by Grinding, Polishing,Cutting,Tempering 3. Surface quality: optical surface quality and well controlled tolerance4. Inside quality: clear and transparent, no mold marks, no inside bubble and dirts,5. Function: Guide of the light beams e.g. glass lens, glass sheet,flat lens,round lens, optical 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.glass sheet