| 摘要 |
PROBLEM TO BE SOLVED: To provide a high resolution use optical unit composing all lenses of plastic lenses. SOLUTION: The optical unit includes the following lenses (1) and (2). (1) The plastic lenses have the Abbe's number of 45-60. (2) The lens is obtained to inject and mold polycarbonate of which limiting viscosity is 0.3-0.5 dl/g by reacting a specific fluorene based bisphenol compound, a compound having 4,4'-[1,3-fenilene (1-methyl ethylidine)]bisphenol and a trifunctional or higher phenol hydroxy group and a carbonate-forming compound with one another. COPYRIGHT: (C)2006,JPO&NCIPI
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