Focusing detecting device

Details Focusing detecting device Focusing detecting device

1980-10-10

1983-05-31

Adams, Russell E.

354 31, G03B 708

Patent

active

043858171

ABSTRACT:
An illuminating system is provided for a focus detecting device capable of producing range detection signals corresponding to the distance between the camera and the objects by receiving with a plurality of photoelectric elements the light of the objects transmitted through a fixed light passage and a movable light passage provided with a movable mirror.
The illuminating light source of the illuminating system is disposed to project the illuminating light through the movable light passage. When the brightness of the objects is low, the plurality of photoelectric elements are integrated into practically a single photoelectric element to combine the outputs of respective photoelectric elements into a single output thus receiving the reflected light of the illumination and providing a focus detection signal.

REFERENCES:
patent: Re27461 (1972-08-01), Harvey
patent: 3435744 (1969-04-01), Stimson
patent: 3442193 (1969-05-01), Pagel
patent: 3443502 (1969-05-01), Harvey
patent: 4085320 (1978-04-01), Wilwerding
patent: 4123650 (1978-10-01), Hosoe et al.
patent: 4255029 (1981-03-01), Freudenschuss
patent: 4257705 (1981-03-01), Hosoe et al.
patent: 4284335 (1981-08-01), Takemae et al.

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