| 摘要 |
PURPOSE:To facilitate assembling and adjustment by arranging a field lens in the optical path between a submirror and the 1st reflecting mirror, and a secondary image forming lens in the optical path between the 1st reflecting mirror and the 2nd reflecting mirror. CONSTITUTION:The 1st reflecting mirror 55 reflects light reflected from the submirror 40 in the optical axis direction of a photographic lens, and the 2nd reflecting mirror 60 reflects light reflected from the 1st reflecting mirror 55 in an upward and a downward direction of a camera. Then, the field lens 54 is arranged in the optical path from the submirror 40 to the 1st reflecting mirror 55 on or near the expected focal plane of the photographic lens, and the secondary image forming lens 58c is arranged in the optical path from the 1st reflecting mirror 55 to the 2nd reflecting mirror 60, so that the elements are arranged effectively in the limited space at the bottom of a mirror box. |
