... clear and transparent, no mold marks, no inside bubble and dirts, 5. Function: Guide of the ... Bi concave lens, Prism, Cylindrical lens, Ball lens, Spherical lens, Aspheric lens, Meniscus lens ... glass lens,ball lens6. Application: Lighting system, Electronics, Electrical ... .g. Lamp cover, Lamp shade, Stage lens, LED lens, Reflector lens, Sight lens, Front lens, ...