| 摘要 |
1,058,034. Rangefinders. VOIGTLANDER A.G. May 25, 1964 [May 25, 1963], No.21601/64. Heading G2J. A short home base rangefinder has a hinged mirror which is adjustably supported by a non- positive three-point mounting, the rotation of the mirror necessary for distance measuring being effected by movement of one of the bearings of the three-point mounting. The mirror 2 is fixed to a support 10 which is held by two pointed grub screws 6, 7 engaging corresponding depressions 601, 701 in the support 10, the connecting line 601-701 determining the pivotal axis of the hinged mirror 2. The third bearing of the mirror mounting is provided by a setting screw 8 which is actuated manually by a knurled knob 19 carrying a scale 20. The support 10 is urged against the three bearings by a spring 13. When determining the range, the setting screw is turned to alter the angular position of the mirror 2 until the image formed by a measuring beam 5 coincides with that formed by a direct beam 4. The rangefinder may be combined with an Albada viewfinder. In the embodiment of Fig. 2 (not shown), the setting screw is replaced by an eccentric cam (44) which is rotated to alter the angular position of the hinged mirror. The cam (44) is operated through a double lever (48), (50) and a transmission rod (49) within the camera body, the rod (49) being displaced by adjustment of the objective. In a further embodiment, Fig. 5 (not shown), the hinged mirror is replaced by a prism (104) held in a hinged mount (103). The beam combining mirror (100) of the viewfinder is arranged in a rectangular glass block (101) which terminates close to the prism (104). |
