Multipoint autofocus system

Details Multipoint autofocus system Multipoint autofocus system

1997-09-17

2000-09-05

Perkey, W. B.

Photography

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

Reliability of focus/distance signal

396122, G03B 1336

Patent

active

061155535

ABSTRACT:
A multipoint autofocus system is provided with a judging apparatus and controller. The multipoint autofocus system detects a focus state of objects at different positions in a plurality of focus detection zones of an image surface. Thereafter, information on the detected focus state is selected, so that a focusing optical system is moved in accordance with the selected focus data. The judging apparatus judges the contrast of the detected object in the focus detection zones. The controller selects data representing the shortest focus from among the focus data of the objects in the focus detection zones in which the judged object contrast is higher than a predetermined value.

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patent: 5397887 (1995-03-01), Sensui
patent: 5585882 (1996-12-01), Akashi

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