Autofocus device and method

Details Autofocus device and method Autofocus device and method

2006-04-12

2009-06-09

Koval, Melissa J (Department: 2862)

Photography

Having variable focal length of camera objective

Having focus operation

C396S090000, C396S135000, C348S345000

Reexamination Certificate

active

07546030

ABSTRACT:
Autofocus device has a lens-driving unit that drives a lens and a focal-point-position-detecting unit that detects a position of a focal point of the lens. The device also has a distance-measuring sensor that measures a distance to a subject and a control unit that performs a focusing operation to control the lens-driving unit to drive the lens, thereby meeting the position of the focal point of the lens detected by the focal-point-position-detecting unit to an in-focus position thereof. The control unit allows to be set a driving direction of the lens and a driving speed of the lens based on the position of the focal point of the lens detected by the focal-point-position-detecting unit and a distance measurement result measured by the distance-measuring sensor. The focusing operation then starts.

REFERENCES:
patent: 6029017 (2000-02-01), Miyazawa et al.
patent: 6624402 (2003-09-01), Kaneko et al.
patent: 7098954 (2006-08-01), Suda et al.
patent: 10-213736 (1998-08-01), None

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