Image blur correction apparatus, and imaging apparatus or optical apparatus equipped with image blur correction apparatus

An image blur correction apparatus comprising:

• a first lens unit including a first correction lens;
• a second lens unit including a second correction lens having a power opposite to that of the first correction lens;
• a supporting unit configured to align the first lens unit and the second lens unit in a direction of an optical axis, so that the first lens unit and the second lens unit can independently move in a direction perpendicular to the optical axis;
• a driving unit configured to drive the first lens unit and the second lens unit;
• a first position detection unit configured to detect the position of the first lens unit relative to the stationary member;
• a second position detection unit configured to detect the position of the second lens unit relative to the first lens unit;
• a shake detection unit configured to detect a shake amount added to the image blur correction apparatus;
• and
• a control unit configured to control the driving unit based on an output of the shake detection unit, wherein the control unit is configured to perform closed-loop control so that the first lens unit moves based on an output of the first position detection unit and the second lens unit moves in a direction opposite to a moving direction of the first lens unit based on an output of the second position detection unit.

An image blur correction apparatus comprising:

• a first lens unit including a first correction lens;
• a second lens unit including a second correction lens having a power opposite to that of the first correction lens;
• a supporting unit attached to a stationary member and configured to support the first lens unit and the second lens unit so as to be movable relative to the stationary member along a plane perpendicular to an optical axis;
• a driving unit configured to drive the first lens unit and the second lens unit;
• a first position detection unit configured to detect the position of the first lens unit relative to the stationary member;
• a second position detection unit configured to detect the position of the second lens unit relative to the first lens unit;
• a shake detection unit configured to detect a shake amount added to the image blur correction apparatus;
• and
• a control unit configured to control the driving unit based on an output of the shake detection unit,
• wherein the control unit is configured to perform open-loop control so that the first lens unit moves based on an output of the first position detection unit and perform closed-loop control so that the second lens unit moves in a direction opposite to a moving direction of the first lens unit based on an output of the second position detection unit.