公开(公告)号：US3756130A

公开(公告)日：1973-09-04

申请号：US3756130D

申请日：1971-04-07

Applicant: MINOLTA CAMERA KK

Inventor： NANBA Y ,  SAHARA M ,  YADA K

IPC: G03B7/083 ,  G03B7/08

CPC classification number: G03B7/083

Abstract: First and second output voltages are generated respectively in accordance with the logarithm of the intensity of light and as a function of a manually set exposure condition. A control signal to initiate shutter closing is generated when a signal which changes in proportion to the logarithm of an elapsed time period initiated by shutter release operation plus the second output voltage is substantially equal to the first output voltage. The control device includes a circuit for comparing the voltages. The device may be modified to generate a third output voltage which changes in response to the change of the signal and then comparing the first output voltage with the second plus the third output voltage.

Abstract translation: 分别根据光强度的对数和手动设定的曝光条件的函数产生第一和第二输出电压。 当通过快门释放操作加上第二输出电压启动的经过时间段的对数变化的信号基本上等于第一输出电压时，产生启动快门关闭的控制信号。 控制装置包括用于比较电压的电路。 可以修改该装置以产生响应于信号变化而变化的第三输出电压，然后将第一输出电压与第二加上第三输出电压进行比较。