System for automatically focusing an object in a camera or the l

Details System for automatically focusing an object in a camera or the l System for automatically focusing an object in a camera or the l

1974-05-20

1976-04-13

Hix, L. T.

G03B 310, G03B 302

Patent

active

039507645

ABSTRACT:
An automatic focusing system which includes a cylindrical image forming lens disposed in opposed relationship with a photocell. The cell and the cylindrical lens are ring-shaped so that the representation characteristic of the cylindrical lens for an object and the light reception characteristic of the photocell cooperate together to detect any pattern of object in accordance with an extreme output value of the photocell.

REFERENCES:
patent: 3180218 (1965-04-01), Durst
patent: 3367254 (1968-02-01), Townsley
patent: 3450018 (1969-06-01), John, Jr.
patent: 3511155 (1970-05-01), Yamada
patent: 3555280 (1971-01-01), Richards, Jr.
patent: 3596101 (1971-07-01), Semeya et al.
patent: 3615137 (1971-10-01), Yamaguchi et al.
patent: 3623811 (1971-11-01), Lederer
patent: 3678826 (1971-06-01), Mori et al.
patent: 3688673 (1972-09-01), Katsuyama
patent: 3720151 (1973-03-01), Katsuyama

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