Focus detecting apparatus for camera

Details Focus detecting apparatus for camera Focus detecting apparatus for camera

1985-12-16

1988-01-12

Perkey, W. B.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

35821319, G03B 300, H04N 5335

Patent

active

047194863

ABSTRACT:
A focus detecting apparatus for a camera has a charge storage type image sensor for controlling focusing on the basis of output from the image sensor. In the apparatus, object information having comparatively high correlation with focus detection precision is detected and charge storage time of a photoelectric conversion element is controlled in accordance with the detected object, whereby charge storage time is optimally controlled irrespective of object luminance distribution even if an object luminance level varies in a wide range, thereby performing high-speed, stable focus detection.

REFERENCES:
patent: 4329577 (1982-07-01), Asano et al.
patent: 4410258 (1983-08-01), Aoki et al.
patent: 4575212 (1986-03-01), Kitaura et al.

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