Patent ID: 7321472
Filing Date: 2008-01-22
Classification: G03B

Abstract:
1. An optical apparatus comprising: a first member; and a second member for rotating around an optical axis with respect to the first member, wherein: one of the first member and the second member has a cam portion; the other of the first member and the second member has a cam follower portion for being engaged with the cam portion; the cam portion drives the first member and the second member relatively to each other in an optical axis direction through relative rotation of the first member and the second member; the first member has first protruding portions and second protruding portions which protrude toward the second member side at positions separate from each other in the optical axis direction; the second member has third protruding portions and fourth protruding portions which protrude toward the first member side at positions separate from the first protruding portions and the second protruding portions in the optical axis direction, and can abut on the first protruding portions and the second protruding portions in the optical axis direction, respectively; and the fourth protruding portions are provided in a circumferential direction of the second member and include protruding portions for transmitting a power.