PLASTIC LENS, MANUFACTURING METHOD THEREOF, PRODUCTION TRACING MANAGEMENT METHOD THEREOF, AND OPTICAL PICKUP DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide a manufacturing method suitable for manufacturing a plastic lens having a marking optimally created thereon, molds, a production tracing management method, and a plastic lens that allows easy product tracing management. PSOLUTION: A lens 1 has a flange part 2 at the outer periphery of its lens surface. A flange surface 21 of the flange part 2 is formed to be higher than the lens surface. The flange surface 21 has a marking 3 to identify a production jig, for example. The lens is manufactured using inserts 51, 52 for forming an optical function portion and molds 53, 54 for forming the marking. PCOPYRIGHT: (C)2010,JPO&INPIT