Patent ID: 7595945
Filing Date: 2009-09-29
Classification: G02B

Abstract:
1. A lens apparatus comprising: a first member having a cam groove portion on its cylindrical surface; and a second member holding a cam follower member which has an engagement portion engaging with the cam groove portion, the first and second members moving relatively in an optical axis direction, wherein the cam follower member has a peripheral portion which projects from the second member at a position facing the cylindrical surface, in a state in which the engagement portion is engaged with the cam groove portion and in a direction orthogonal to the optical axis direction, the interval between the cylindrical surface and the peripheral portion is smaller than that between the bottom surface of the cam groove portion and the end surface, which faces the bottom surface, of the engagement portion, and the peripheral portion is contactable to the cylindrical surface when one of the first and second members displaces with respect to the other in the direction orthogonal to the optical axis direction.