Photosensor arrangement for encoding lens and shutter blade posi

Details Photosensor arrangement for encoding lens and shutter blade posi Photosensor arrangement for encoding lens and shutter blade posi

1984-03-28

1985-12-10

Hix, L. T.

354246, G03B 310, G03B 940

Patent

active

045575738

ABSTRACT:
A photographic exposure control system includes a dual purpose light sensing arrangement comprising a single photocell and light emitting diode pair which provide control signals indicative of both the focal position of a variable focus lens as well as the position in which the shutter blades first allow the transmission of scene light to the focal plane of the camera.

REFERENCES:
patent: 3942183 (1976-03-01), Whiteside
patent: 4167316 (1979-09-01), Johnson et al.
patent: 4192587 (1980-03-01), LaRocque et al.
patent: 4360258 (1982-11-01), Hashimoto
patent: 4410255 (1983-10-01), Hirohata
patent: 4426145 (1984-01-01), Hashimoto

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