| 摘要 |
PROBLEM TO BE SOLVED: To rotate an optical member around an optical axis, and to facilitate attachment and removal work of an optical member holder. SOLUTION: A pawl 43 made of resin having spring property that is rotatably engaged to one annular groove 61b provided to a lens barrel 61 is integrally provided to a holding part 41 made of resin for holding a 1/4 wavelength plate 3 and having spring property. COPYRIGHT: (C)2009,JPO&INPIT
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