| 摘要 |
PROBLEM TO BE SOLVED: To provide a device superior in repeating position precision of a rotation position of a mirror in a mirror device for an imaging device having the rotatable mirror. SOLUTION: A mirror unit 3 of the mirror device 10 comprises a main mirror frame 4 for holding a main mirror 5 and a sub mirror frame 6 for holding a sub mirror 7. Rotating shaft parts 4a and 4b of both the ends of the main mirror frame 4 are rotatably supported on a mirror box 1 and a mirror adjusting plate 8. When being changed in an observation state and a retreat state, the main mirror frame 4 rotates around the rotating shaft part as a center. The rotating shaft part is fitted to receive energizing force in a direction of a V-shaped part by a pushing spring on bearing parts 1d and 8d having a V-shaped part of the mirror box 1 and the mirror adjusting plate 8. Since two points of the respective bearing parts are supported in a state where they are contacted on the V-shaped part, a relative fitting position of the rotating shaft part and the bearing part is not changed even when being driven repeatedly, and a rotating state of the mirror excellent in repeating precision can be obtained. COPYRIGHT: (C)2007,JPO&INPIT
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