发明名称 |
FOTOMETRISCHE SCHALTUNG IN EINER FOTOGRAFISCHEN BLITZEINRICHTUNG |
摘要 |
<p>An improved photographic flash device of the type in which a photometric circuit exposed to light reflected from a subject being photographed generates a photometric signal which controls the amount of light emitted by the flash discharge tube of the device. A synchronizing switch closed by opening the shutter of the camera with which the device is employed activates a starting circuit to generate a starting signal, which in turn starts a timer powered by the low tension circuit of a DC-DC converter utilized in the flash device. The timer applies a constant voltage to the photometric circuit for a predetermined period of time. Both the starting circuit and timer are capable of reduction to integrated circuit form.</p> |
申请公布号 |
DE3326610(A1) |
申请公布日期 |
1984.03.01 |
申请号 |
DE19833326610 |
申请日期 |
1983.07.23 |
申请人 |
FUJI KOEKI K.K.;TAKEMATSU,YOSHIYUKI |
发明人 |
TAKEMATSU,YOSHIYUKI |
分类号 |
G01J1/42;G03B15/05;H05B41/32;(IPC1-7):03B15/05 |
主分类号 |
G01J1/42 |
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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