| 摘要 |
A lens barrel includes a lens movable in a direction orthogonal to the optical axis of the lens barrel, a movable member that holds the lens, a fixed member that regulates movement of the movable member in a direction of the optical axis, at least three balls placed between the movable member and the fixed member, each of the balls being held in a holding portion formed in one of the movable member and the fixed member so as to roll and to allow relative movement between the movable member and the fixed member, an urging member that urges the movable member toward the fixed member, a driving unit that generates force for moving the movable member in two directions orthogonal to the optical axis, and a position detecting mechanism for detecting positions of the movable member in the two directions orthogonal to the optical axis.
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