Automatic focus adjustment device and method

Details Automatic focus adjustment device and method Automatic focus adjustment device and method

1995-08-22

1997-09-02

Adams, Russell E.

Photography

With exposure objective focusing means, focusing aid, or...

Having accumulation photoarray and time control means

G03B 300, G03B 1318, G03B 1332

Patent

active

056642377

ABSTRACT:
An automatic focus adjustment device includes a photoelectric conversion device, a focus state detection device and a photoelectric conversion timing control device. The photoelectric conversion device has a plurality of areas that receive light signals from a photographic optical system and that convert the light signals into electrical signals by accumulating electric charge over accumulation time intervals. The focus state detection device, which is connected to the photoelectric conversion device, receives and detects a focus adjustment state in accordance with the electrical signals. The photoelectric conversion timing control device controls the photoelectric conversion device to match a first accumulation time interval to a second accumulation time interval. As a result, midpoint times of the accumulation time intervals need not be recorded, and memory capacity can thus be reduced.

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