Lens driving control apparatus for zoom lens

Details Lens driving control apparatus for zoom lens Lens driving control apparatus for zoom lens

1998-03-27

2000-10-17

Perkey, W. B.

Photography

Having variable focal length of camera objective

Automatic change of focal length

359698, 348358, G03B 1700, G02B 1514

Patent

active

061343900

ABSTRACT:
A lens driving control apparatus for a zoom lens includes a zooming operation member for operating a zoom part of the zoom lens, a focusing operation member for operating a focusing lens part of the zoom lens, and a control circuit for driving and controlling the zoom part. The control circuit computes information about driving of the zoom part for substantially preventing a change of angle of view resulting from movement of the focusing lens part, on the basis of an operation signal of the zooming operation member and an operation signal of the focusing operation member or a position signal of the focusing lens part and a position signal of the zoom part, and drives and controls the zoom part in accordance with the computed information.

REFERENCES:
patent: 4083057 (1978-04-01), Quinn
patent: 4156933 (1979-05-01), Pandres, Jr.
patent: 5204710 (1993-04-01), Tsukamoto et al.
patent: 5434621 (1995-07-01), Yu
patent: 5515204 (1996-05-01), Usui et al.
Patent Abstracts of Japan JP 06 250071 A, Sep. 9, 1994, vol. 18, No. 642.

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