Focus state detecting device

Details Focus state detecting device Focus state detecting device

1990-10-23

1991-07-09

Adams, Russell E.

354408, G03B 1336

Patent

active

050299980

ABSTRACT:
A focus state detecting device for a camera has plural areas for focus state detection for an object, and is capable of securing wide focus state detecting areas.
The device has a pair of first photo-detector arrays arranged in a first direction and a pair of second photo-detector arrays arranged in a second direction, wherein the light receiving area of the first arrays is wider than that of the second arrays, and the first direction is the same as the longitudinal direction of the photographing field.

REFERENCES:
patent: 4564919 (1986-01-01), Utagawa
patent: 4768052 (1988-08-01), Hamada et al.

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