| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a non-birefringent optical resin by diminishing wide orientation birefringence of the resin, and to provide an optical element by using the same. <P>SOLUTION: The non-birefringent optical resin material is obtained by adding a chain-form birefringent molecule having a tendency of diminishing the orientation birefringence of a transparent polymeric resin and performing polymerization, kneading, and the like. The chain-form birefringent molecule has a structure (A structure) having a π-electron conjugated system having a widened structure as a rod shape and a chain-form structure (B structure) capable of bending and intertwining with surrounding matrix polymer molecular chains and having 400-1,500 molecular weight. The non-birefringent optical resin material can be used as the sheet-formed or lens-shaped non-birefringent optical elements. The A structure is e.g. a naphthalene structure, biphenyl structure, and the B structure is e.g. a straight chain-form hydrocarbon structure, branched straight chain-form hydrocarbon structure, straight chain-form carbon fluorine structure. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
