| 摘要 |
PROBLEM TO BE SOLVED: To prevent dust from adhering to an imaging unit by a simple arrangement. SOLUTION: In a bottom plate 21 of a mirror box 20, a vent 21a is provided to a position close to a lens compared with a tip of a mirror unit 30 which is an observation position. When the mirror unit 30 moves up, air comes down through a gap between the mirror unit 30 and an interchangeable lens 200, and is emitted to a lower space 50 through the vent 21a. Thus, most of the dust in the air is also exhausted to the lower space 50. COPYRIGHT: (C)2008,JPO&INPIT |
