... no inside bubble and dirts5. Function: Guide of the light beams e.g. Fresnel lens, Plano lens, Bi convex ... lens, Glass lens,molded lens6. Application: Lighting system, Electronics, Electrical apparatus, Industries, e.g. Stage lens, LED lens, Reflector lens, ... Sight lens, Front lens, Refractor, Molded lens, Spot lens, Lamp cover, Lamp shade, Light shade, Lighting ...