Camera focus detecting device

Details Camera focus detecting device Camera focus detecting device

1979-06-08

1981-03-03

Gellner, Michael L.

354 31, G03B 310

Patent

active

042537517

ABSTRACT:
A focus detection optical system where the image of an object is divided into two images thereof, and the two images are shifted in the opposite directions or one of the two images is shifted. The two images are projected respectively onto two photoelectric conversion element groups adapted to convert the variations in relative position of the two images into electrical signals. A focus detecting device comprises: a calculating circuit for providing outputs V.sub.out1(m), V.sub.out2(m) and V.sub.out3(m) from the outputs of photoelectric conversion elements forming the photoelectric conversion element groups,

REFERENCES:
patent: 3838275 (1974-09-01), Stauffer
patent: 3846629 (1974-11-01), Stauffer
patent: 4047022 (1977-09-01), Holle
patent: 4078171 (1978-03-01), Stauffer

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