Focus detection apparatus for camera

Details Focus detection apparatus for camera Focus detection apparatus for camera

1989-08-25

1990-08-28

Perkey, W. B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

354406, 2502012, G03B 300, G01J 120

Patent

active

049529633

ABSTRACT:
A focus detection apparatus including an image signal storage type sensor having a plurality of pixels and a storage time control circuit for controlling an intensity level of the sensor, wherein the storage time of an image signal in the sensor is controlled such that the image signal has an optimal level, and focus detection is performed on the basis of the image signal whose storage time is controlled. A pixel output range used for focus detection and a sensor area used for storage time control are changed on the basis of the focus detection result.

REFERENCES:
patent: 4346970 (1982-08-01), Kawabata et al.
patent: 4475800 (1984-10-01), Kinoshita et al.
patent: 4523829 (1985-06-01), Eguchi et al.
patent: 4633073 (1986-12-01), Horikawa
patent: 4716434 (1987-12-01), Taniguchi et al.

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