Lens control system

Details Lens control system Lens control system

Filed on

1991-03-08

Date issued

1992-09-01

Examiner

Ben, Loha

Patent Class

Optical: systems and elements

SubClass

Lens

SubSubClass

With variable magnification

Other Related Categories

359693, 359705, 354400, 35419512, G02B 1500

Type

Patent

Status

active

Patent number

051444925

Description

ABSTRACT:
A lens control system is disclosed, which comprises a focusing lens drive for driving a focusing lens for focus control, a zooming lens drive for driving a zooming lens for zooming, a focusing lens position detector for detecting the position of the focusing lens, a zooming lens position detector for detecting the position of the zooming lens, and a control circuit for controlling, when the zooming lens position detector detects that the zooming lens is in a macro region, the focusing lens drive to stop the focusing lens at a predetermined position.

REFERENCES:
patent: 4609260 (1986-09-01), Kawai
patent: 4899190 (1990-02-01), Hata
patent: 4975724 (1990-12-01), Hirasawa et al.
patent: 4976523 (1990-12-01), Ishikawa
patent: 4991944 (1991-02-01), Hirao et al.
patent: 5038163 (1991-08-01), Hirasawa

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