发明名称 |
Exposure information input circuit for electric shutter |
摘要 |
In an electric shutter having a photoelectric element, a time constant circuit for use in controlling exposure and a low brightness sensor circuit for use in connecting said photoelectric element in series with a comparator resistance and in sensing a low brightness in reference to its partial voltage, an exposure information input circuit for setting one reference voltage to be applied for determining said trigger levels of the two sensor circuits so as to feed exposure information such as film sensitivity, etc. and further having a function correction circuit between said reference voltage and one of said two sensor circuits.
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申请公布号 |
US4353631(A) |
申请公布日期 |
1982.10.12 |
申请号 |
US19800143912 |
申请日期 |
1980.04.25 |
申请人 |
SEIKO KOKI KABUSHIKI KAISHA |
发明人 |
TAKAZAWA, YUZURU;NAGAOKA, SHINJI |
分类号 |
G03B7/081;G03B7/083;(IPC1-7):G03B17/18 |
主分类号 |
G03B7/081 |
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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