Automatic focusing apparatus of a camera

Details Automatic focusing apparatus of a camera Automatic focusing apparatus of a camera

1996-01-23

1998-03-31

Adams, Russell E.

Photography

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

Having pursuit mode

396121, G03B 1334

Patent

active

057349380

ABSTRACT:
An automatic focusing apparatus of a camera according to the present invention includes: a focus detector which detects repeatedly focus conditions of a photographic lens and outputs successively focus signals corresponding to the focus conditions; a drive unit for driving the photographic lens for focus adjustment; a predictor for predicting an in-focus point from the plurality of focus signals from the focus detector; a control unit for controlling the drive unit to drive the photographic lens toward the in-focus point predicted by the predictor; an auxiliary light projector for projecting auxiliary light onto an object to enable detecting operation of the focus detector; and a forbidding device for forbidding the control of drive by the control unit while the auxiliary light is projected by the auxiliary light projector.

REFERENCES:
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patent: 4831403 (1989-05-01), Ishida et al.
patent: 4860045 (1989-08-01), Hamada et al.
patent: 4872058 (1989-10-01), Baba et al.
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patent: 4988856 (1991-01-01), Hamada et al.
patent: 5023646 (1991-06-01), Ishida et al.
patent: 5031049 (1991-07-01), Toyama et al.
patent: 5049731 (1991-09-01), Ishida et al.
patent: 5053801 (1991-10-01), Ishida et al.
patent: 5517274 (1996-05-01), Hamada et al.

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