| CPC G02B 27/648 (2013.01) [G02B 7/102 (2013.01)] | 20 Claims |
|
1. 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.
|