| 摘要 |
PROBLEM TO BE SOLVED: To improve mechanical durability of a rotation stop mechanism of a lens holding member.SOLUTION: A lens device L includes: a lens holding member 10 that holds a lens L4 and is movable in an optical axis direction; a guide member 11a that guides the lens holding member in the optical axis direction; and a rotation stop member 11b with which a groove portion 10b formed in the lens holding member engages slidably so that movement of the lens holding member in the optical axis direction is allowed and rotation of the lens holding member about the guide member is blocked. The rotation stop member is disposed inclined with respect to the optical axis direction. In accordance with the movement of the lens holding member in the optical axis direction, a contact range 50 of the groove portion with the rotation stop member is changed in a direction orthogonal to the optical axis direction. |
