Focus condition detecting arrangement

Details Focus condition detecting arrangement Focus condition detecting arrangement

1986-10-08

1987-09-29

Perkey, W. B.

G03B 300

Patent

active

046965580

ABSTRACT:
In a focus condition detecting arrangement for use in a photographic camera, a focus condition detecting device including photo-sensor arrays having sensitivity with respect to a visible light and an infrared light from a target object to be photographed produces a focus condition detection signal based on an output of the photo-sensor arrays. A contrast detecting device which detects the visible light and the infrared light from the target object for detecting contrasts of the target object with respect to the respective lights, and a correcting means corrects the focus condition detection signal based on the output of the contrast detecting device, so that a corrected focus condition detection signal of the target object with respect to the visible light region is obtained.

REFERENCES:
patent: 4473287 (1984-09-01), Fukuhara et al.
patent: 4602861 (1986-07-01), Taniguchi et al.

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