发明名称 |
Shutter control apparatus for a camera |
摘要 |
A camera shutter control apparatus comprises a detector for detecting the actual amount of opening of a camera shutter, comprised by a light emitter, a light detector, and a light controller for varying the amount of light passing therethrough from the light emitter to the light detector according to the detected amount of opening of the shutter. A controller controls the light emitter to emit a predetermined constant amount of light based on an output from the light detector. An operating device actuates the shutter in such a way to make the output of the light detector coincide with a signal representative of a predetermined shutter opening characteristic. The shutter is controlled to open and close following the predetermined characteristic defined by a shutter opening-closing program which is changeable according to the focal length of the camera lens.
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申请公布号 |
US4769667(A) |
申请公布日期 |
1988.09.06 |
申请号 |
US19870070115 |
申请日期 |
1987.07.06 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
ISHIGURO, MINORU;ASANO, SEIJI |
分类号 |
G03B7/083;(IPC1-7):G03B7/08 |
主分类号 |
G03B7/083 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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