Lens apparatus and image pickup apparatus
AssigneeCanon Kabushiki Kaisha
InventorTomohiko Sugiyama
Life of this patent
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Abstract
An apparatus including: a first frame holding a first optical element, a second frame holding a second optical element, a third frame holding a third optical element, in order along an optical axis; a first driving unit moving the first frame when energized and holding the first frame when unenergized; a second driving unit moving the second frame when energized and not holding the second frame when unenergized; a third driving unit moving the third frame when energized and hold a position of the third frame when unenergized; and a controller controlling the first, second and third driving units, wherein the controller controls the second driving unit to become unenergized after at least a part of at least one of the first and third frames is moved within a movable range of the second frame.
Claims20
An apparatus comprising:
- a first frame holding a first optical element, a second frame holding a second optical element, a third frame holding a third optical element, arranged in order along an optical axis;
- a first driving unit configured to move the first frame in an optical axis direction in an energized state, and hold a position of the first frame in an unenergized state;
- a second driving unit configured to move the second frame in the optical axis direction in the energized state, and not hold a position of the second frame in the unenergized state;
- a third driving unit configured to move the third frame in the optical axis direction in the energized state, and hold a position of the third frame in the unenergized state;
- and
- a controller configured to control the first driving unit, the second driving unit and the third driving unit,
- wherein the controller controls the second driving unit to become the unenergized state from the energized state after at least a part of at least one of the first frame and the third frame is moved within a movable range of the second frame.
An apparatus comprising:
- a first frame holding a first optical element, a second frame holding a second optical element, and a fixed member, arranged in order along an optical axis,
- a first driving unit configured to move the first frame in an optical axis direction in an energized state, and hold a position of the first frame in an unenergized state;
- a second driving unit configured to move the second frame in the optical axis direction in the energized state, and not hold a position of the second frame in the unenergized state;
- a controller configured to control the first driving unit and the second driving unit,
- wherein the controller controls the second driving unit to become the unenergized state from the energized state after at least a part of the first frame is moved outside a movable range for picking up an image of the first frame and within a movable range of the second frame.
Dependencies are inferred from the claim text.