| 摘要 |
PROBLEM TO BE SOLVED: To provide a camera in which a half mirror does not spoil uniformity of image quality in a camera where the half mirror is arranged in a photographing optical path. SOLUTION: Principal rays 21, 23, 25 are made incident on incident points 11b,11c,11a of the half mirror of a quick return mirror 11, respectively, and a part of them is transmitted therethrough. Optical path length at each transmission part is L2, L3 or L1. The half mirror has a wedge shape so that optical path length toward each principal ray is equal and a relation: L1=L2=L3 is satisfied. COPYRIGHT: (C)2008,JPO&INPIT
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