发明名称 |
Photographic camera with focussing system which time-multiplexes the signals from plural photodetectors |
摘要 |
An infrared measuring beam is emitted from the camera towards the subject, and reflected back as a tiny light spot projected, by an optics which transversely shifts in dependence upon exposure-objective subject-distance setting, onto one, the other or both of two infrared photodiodes. The signals from the two photodiodes are transmitted in processed form to two output flip-flops through the intermediary of a single, shared signal-processing stage, employing time-division-multiplexed transmission of the two photodiode signals, to assure that the signal processing of the two photodiode output signals be as identical as possible.
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申请公布号 |
US4221474(A) |
申请公布日期 |
1980.09.09 |
申请号 |
US19790005091 |
申请日期 |
1979.01.22 |
申请人 |
AGFA-GEVAERT AG |
发明人 |
LERMANN, PETER;COCRON, ISTVAN;WAGENSONNER, EDUARD;BOROWSKI, KURT;HUBER, THEODOR |
分类号 |
G03B13/36;G01C3/24;G01D5/18;G01D5/244;G01D5/245;G02B7/32;(IPC1-7):G03B13/18 |
主分类号 |
G03B13/36 |
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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