公开(公告)号：US3643562A

公开(公告)日：1972-02-22

申请号：US3643562D

申请日：1970-11-17

申请人： OLYMPUS OPTICAL CO

发明人： SOICHIRO MATSUZAKI ,  SATO MASANOBU ,  TOSHIKAZU KATO

IPC分类号： G03B7/12 ,  G03B9/22 ,  G01J1/04

CPC分类号： G03B9/22 ,  G03B7/12

摘要： A photographic shutter in which the shutter blades are opened to such an extent as to define the effective aperture of the objective corresponding to the scene brightness for obtaining the proper exposure. The shutter has a first lever which pivots through a predetermined angle each time the shutter is operated, a second lever coupled with a shutter blade operating ring so as to open the shutter blades to an objective aperture corresponding to the pivoting movement of the second lever, and a third lever interposed between the first and second levers so as to transmit the movement of the first lever to the second lever. The pivot axis of the third lever is shifted in accordance with the scene brightness sensed by a photoelectric exposure control device so that the second lever is moved at a variable transmission ratio by the first lever in accordance with the sensed scene brightness for proper exposure.

摘要翻译： 一种照相快门，其中快门叶片打开到限定对应于场景亮度的目标的有效孔径以获得适当曝光的程度。 快门具有每当快门操作时枢转预定角度的第一杠杆，与快门叶片操作环耦合以便将快门叶片打开到与第二杆的枢转运动对应的物镜孔的第二杆， 以及插入在所述第一和第二杆之间的第三杆，以将所述第一杆的运动传递到所述第二杆。 根据由光电曝光控制装置感测到的场景亮度，第三杆的转动轴线被移动，使得第二杆根据感测到的场景亮度适当地曝光由第一杆以可变传动比移动。