Camera shake correction apparatus

A camera shake correction apparatus driving a movable member including an optical member or an imaging member with respect to a fixed member, based on a detected camera shake amount, comprising:

• a target position setting unit setting a target position to which the movable member is to be moved based on the camera shake amount;
• a current setting unit setting a current set value to move the movable member to the target position;
• a driving unit driving a voice coil motor formed driving coil disposed in one of the movable member and the fixed member and a magnet disposed in the other of the movable member and the fixed member and used for detecting a position of the movable member and driving the movable member, based on the current set value, and thereby moving the movable member with respect to the fixed member;
• a magnetic flux detector detecting a magnetic flux value changed with movement of the movable member by the driving unit;
• an arithmetic unit calculating a third magnetic flux value by subtracting a second magnetic flux value estimated to be generated based on a current value flowing through the driving coil from a first magnetic flux value actually detected by the magnetic flux detector, when the current set value belongs to a nonlinear region in which the relationship of a magnetic flux value to the current set value is nonlinear;
• and
• a position calculator calculating a present position of the movable member from the third magnetic flux value,
• wherein the current setting unit sets the current set value based on the target position and the present position.