Patent ID: 6314240
Filing Date: 2001-11-06
Classification: G02B

Abstract:
A lens control apparatus comprising:lens position detecting means for detecting a position of a magnification lens and a position of a focus compensation lens;lens moving means for moving said magnification lens and said focus compensation lens in a direction of an optical axis for a zooming operation;storage means for storing a plurality of position information of said focus compensation lens for maintaining in focus state during said magnification lens being driven;calculating means for calculating a position to which said focus compensation lens is to be moved by using the magnification lens and the focus compensation lens positions detected by said lens position detecting means and the lens position information stored in said storage means in the case that the lens position information detected by said lens position detecting means is not included in the plurality of position information in said storage means; andcontrol means for controlling said lens moving means to drive said focus compensation lens on the basis of a calculation result of said calculating means during a zooming operation by a driving operation of said magnification lens and to drive said magnification lens to the position corresponding to the position information of said focus compensation lens stored in said storage means when the zooming operation is completed.