| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical path opening/closing device that ensures high accuracy in aperture setting and to provide an imaging apparatus having the optical path opening/closing device. SOLUTION: The optical path opening/closing device 1 has a combined vane 10, composed of six vane members 11, for opening or closing an optical path aperture 31 as the device is rotated; metal cam pins 35 engaging with the cam grooves 17 of the vane members 11; a main plate A30, made of a resin, to which the cam pins 35 are formed; support point pins 21, made of metal, which serve as the centers around which the corresponding vane members 11 are rotated; and a windmill 20, made of a resin, on which the support point pins 21 are formed. The windmill 20 and the main plate A30 are relatively rotated. The cam pins 35 are firmly fitted in the main plate A30, and the support point pins 21 are firmly fitted in the windmill 20. Since the support point pins 21 and cam pins 35 are made of metal, they can be processed with high accuracy. This makes it possible to bring a clearance between the support point hole of each vane member and the corresponding support point pin and a clearance between the cam groove of each vane member and a cam pin to close to design values and hence ensure high accuracy in aperture setting. COPYRIGHT: (C)2007,JPO&INPIT
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