Photographic camera with focussing system which time-multiplexes

Details Photographic camera with focussing system which time-multiplexes Photographic camera with focussing system which time-multiplexes

1979-01-22

1980-09-09

Gonzales, John

354 25, 354 31, G03B 1318

Patent

active

042214742

ABSTRACT:
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.

REFERENCES:
patent: 3610934 (1971-10-01), Turner
patent: 3836919 (1974-09-01), Matsumoto et al.
patent: 4126870 (1978-11-01), Kondo

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