发明名称 |
Exposure timing circuit for automatic photoflash camera - has potentiometer adjustment to set, or alter exposure time, with manual override |
摘要 |
<p>The automatic photo flash control for a camera has the reflected light from the object monitored and the signal compared with a reference signal calculated from the exposure details and e.g. film speed. This generates a timing signal for the exposure speed. The control also provides a signal to indicate that the photoflash is ready. A manual override is provided to set a determined exposure speed, whose signal is fed into the comparator and operates the exposure irrespective of the lighting conditions. No additional circuitry is required, other than a potentiometer operated by the manual control. This provides a manual exposure speed, or modulates the automatic exposure speed.</p> |
申请公布号 |
DE2901149(A1) |
申请公布日期 |
1980.07.24 |
申请号 |
DE19792901149 |
申请日期 |
1979.01.12 |
申请人 |
FUJI PHOTO OPTICAL CO.,LTD. |
发明人 |
NUMATA,SABURO |
分类号 |
G03B7/16;(IPC1-7):03B7/16;03B15/05 |
主分类号 |
G03B7/16 |
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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