Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1987-03-23
1988-03-22
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
354403, G01J 120
Patent
active
047330627
ABSTRACT:
A focus detecting device comprising a light source means alternately producing a pair of light beams directed to the surface of an object, a light receiving element arranged on an image surface and detecting the image positions of the pair of light beams reflected on the object surface and a signal processing means detecting the displacements of the image positions of the pair of light beams with signals from the light receiving element, in order to simplify the formation of the entire device and to be able to quickly focus even a dark object.
REFERENCES:
patent: 3836919 (1974-09-01), Matsumoto et al.
patent: 4427880 (1984-01-01), Kanade et al.
patent: 4441810 (1984-04-01), Momose et al.
patent: 4445029 (1984-04-01), Nagaoka et al.
patent: 4501961 (1985-02-01), Stauffer
patent: 4541702 (1985-09-01), Momose et al.
patent: 4542971 (1985-09-01), Numata
patent: 4543476 (1985-09-01), Horikawa
Nelms David C.
Olympus Optical Co,. Ltd.
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