Optical devices

Abstract

Reduces the driving load on the moving member caused by biasing force. [Solution] The optical device 101 includes a cam cylinder 800 having cam grooves 801 and 802, a first moving member 410 having a first cam follower 411, a second moving member 420 having a second cam follower 422, and a biasing means 430 for applying a biasing force to the second moving member. The cam groove has a first cam surface 401a and a second cam surface 401b that move the first cam follower in the optical axis direction as the cam cylinder rotates, and a third cam surface 402a provided at a different position in the radial direction of the cam cylinder from the first or second cam surface, which moves the second cam follower, which has received the biasing force, in the optical axis direction as the cam cylinder rotates.

Claims

1. A cam cylinder having a cam groove, A first moving member having a first cam follower, A second moving member having a second cam follower, The second moving member has a biasing means for applying a biasing force, The aforementioned cam groove portion is The first cam follower moves in the optical axis direction as the cam cylinder rotates, and the first cam surface and second cam surface move in the optical axis direction as the cam cylinder rotates, An optical device characterized by having a third cam surface provided at different positions in the radial direction of the cam cylinder from the first or second cam surface, which moves the biased second cam follower in the optical axis direction as the cam cylinder rotates.

2. The optical device according to claim 1, characterized in that the cam groove portion is formed as a single continuous groove portion in the groove width direction of the cam groove portion.

3. The optical device according to claim 1, characterized in that the cam groove portion is formed by a first cam groove portion having a first cam surface and a second cam surface, and a second cam groove portion formed in the first cam groove portion as a continuous groove portion in the groove width direction of the first cam groove portion and having a third cam surface.

4. The first and second cam grooves are formed in the peripheral wall portion of the cam cylinder, The first cam groove is formed to penetrate the peripheral wall in the radial direction, The optical device according to claim 3, characterized in that the second cam groove is formed so as not to penetrate the peripheral wall in the radial direction.

5. The optical apparatus according to claim 3, characterized in that the first cam groove and the second cam groove have portions that overlap with each other in the optical axis direction.

6. The optical device according to claim 1, characterized in that the third cam surface has a different cam shape from the first and second cam surfaces.

7. The optical device according to claim 1, characterized in that the first cam follower is movably fitted between the first cam surface and the second cam surface.

8. The first cam follower supports a first mass including the first moving member and the element held by the first moving member, The second cam follower supports the second mass, which includes the second moving member and the element held by the second moving member. The optical device according to claim 1, characterized in that the first mass is greater than the second mass.

9. The optical apparatus according to claim 1, characterized in that the first cam follower and the second cam follower are arranged in different phases relative to each other in the direction of the optical axis.

10. The optical apparatus according to claim 1, characterized in that the biasing means is disposed between the first moving member and the second moving member.

11. The first movable member holds the first optical element, The optical device according to claim 1, characterized in that the second moving member holds the second optical element.

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