| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lens barrel capable of reducing the number of components and preventing the deterioration of optical performance, and an optical device.SOLUTION: The lens barrel comprises: a fixed cylinder 109 having an integrally-formed projection 109a and a straight advance groove 109d; a cam member 112 having a circumferential groove 112a extending in the circumferential direction and engaged with the projection and a cam follower 112b, and being rotatable about the optical axis by the engagement between the projection and the circumferential groove; a first lens barrel 101 having a cam 101a engaged with the cam follower and a projection 101b engaged with the straight advance groove, and moving in the optical axis direction by the engagement between the cam follower and the cam when the cam member is rotated; and an elastic member 127 fixed in the vicinity of the cam follower, and applying an elastic force in the optical axis direction between the cam member and the fixed cylinder.</p> |
