Patent ID: 9091799
Filing Date: 2015-07-28
Classification: G02B

Abstract:
1. A lens barrel comprising: a drive unit; a lead screw that is provided on an axis of the drive unit and is rotatably driven by the drive unit; a rotation member that is provided at a root section of the lead screw on the drive unit side and rotates integrally with the lead screw; a detecting unit configured to detect rotation of the rotation member; a linear motion member that is screwed to the lead screw and advances or retracts in the direction of the optical axis of an imaging optical system in accordance with the rotation drive of the lead screw; and a lens holding frame that holds a lens which is part of the imaging optical system and advances or retracts in the direction of the optical axis by engaging with the linear motion member, wherein in a case where the lens holding frame is retracted toward a drive unit side, the rotation member and the lens holding frame or the lens are overlapped with each other as viewed from the direction orthogonal to the optical axis.