Lens driving unit, and lens apparatus and image pickup apparatus including the same

摘要

A lens driver moving a lens perpendicularly to optical axis, the lens driver including: fined member; movable member holding the lens; spacer interposed therebetween with the members being movable to each other perpendicularly to optical axis; biasing unit biasing the movable member toward the fixed member; detector for detecting position of the movable member relative to the fixed member in plane perpendicular to optical axis; driver driving the movable member relative to the fixed member perpendicularly to optical axis; controller controlling the driver based on position of the movable member; and range definer defining: movable position having large movable range between the members in the perpendicular plane; and fixed position having small movable range between the members in the perpendicular plane based on rotation position about optical axis where sliding friction is generated between the spacer and one of the members, or between the driving unit and the movable member.

主权项

1. A lens driving unit for moving a lens in a lens apparatus in a direction perpendicular to an optical axis of the lens apparatus, the lens driving unit comprising:
a fixed member; a movable member to which the lens is fixed, the movable member being movable in the direction perpendicular to the optical axis of the lens; a spacer interposed between the fixed member and the movable member; a biasing unit for biasing the movable member toward the fixed member; a position detector for detecting a position of the movable member with respect to the fixed member in the direction perpendicular to the optical axis of the lens; a driving unit for driving the movable member with respect to the fixed member in the direction perpendicular to the optical axis; and a controller for controlling the driving unit to drive the movable member based on the position of the movable member detected by the position detector, wherein the controller controls driving of the driving unit in a fixed state and a movable state where the fixed state and the movable state are different from each other in a relative rotational position between the fixed member and the movable member about an optical axis of the lens, wherein a relative movable range of the movable member in a direction perpendicular to the optical axis in the movable state is larger than the relative movable range of the movable member in the direction perpendicular to the optical axis in the fixed state, wherein the controller controls the driving of the driving unit based on a position of the movable member detected by the position detector in the movable state, and the controller controls the movable member and the fixed member so as not to contact to each other in the fixed state.