| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly accurate optical part, which is obtained by injection molding and has at least one effective curved surface. SOLUTION: In the optical part, which is obtained by injection molding and has at least one effective curved surface, the part is mainly made of a cyclic olefin based copolymer and does not have a non-transfer region having a size larger than 10μm on the effective curved surface. COPYRIGHT: (C)2004,JPO |
