... : by Molding, Grinding, Polishing3. Surface quality: optical surface quality and well controlled tolerance4. Inside quality: clear and transparent, no mold marks, no ... .g. Fresnel lens, Plano lens, Bi convex lens, Bi concave lens, Prism, Cylindrical lens, Ball lens, Spherical lens, Aspheric lens, Meniscus lens, flat lens, round lens, Optical lens, Glass lens,Pattern lens,automobile lens6. Application ...