Patent ID: 6570142
Filing Date: 2003-05-27
Classification: G02B

Abstract:
A position control device arranged to store, as a target position, a position at which a moving member is stopped and to move the moving member to the target position from a position other than the target position, said position control device comprising:first detecting means which divides a movable range of the moving member into a plurality of areas and detects in which area of the plurality of areas the moving member is located; second detecting means which detects an amount of movement of the moving member; storage means which stores information specifying a target area in which the target position exists among the plurality of areas and indicating a position where the target position is located within the target area, wherein said information indicating the target position is information about the amount of movement between said target position and an area adjacent to said specified target area; and control means which controls, in moving the moving member to the target position from a position other than the target position, movement of the moving member on the basis of results of detection made by said first detecting means and said second detecting means and the information stored in said storage means.