| 摘要 |
An optical apparatus includes a base member (101) including a first rotation limiting end and a second rotation limiting end, a cylindrical member (113) rotatable relative to the base member in a circumferential direction, an abutting member (128) fixed on the cylindrical member, capable of abutting on each of the first and second rotation limiting ends, and rotatable, along with the cylindrical member, between the first and second rotation limiting ends, a first rolling support member (107) fixed on the base member to support the cylindrical member, rotatable around an axis that is parallel to a rotation center axis of the cylindrical member, and rotatable in a direction orthogonal to the rotation center axis, and the first rolling support member is disposed in a third region where a first region and a second region in a region around the rotation center axis overlap each other. |
| 主权项 |
1. An optical apparatus comprising:
a base member including a first rotation limiting end and a second rotation limiting end; a cylindrical member rotatable relative to the base member in a circumferential direction; an abutting member fixed on the cylindrical member, capable of abutting on each of the first and second rotation limiting ends, and rotatable, along with the cylindrical member, between the first and second rotation limiting ends; a first rolling support member fixed on the base member to support the cylindrical member, rollable around an axis parallel to a rotation center axis of the cylindrical member, and movable in a direction orthogonal to the rotation center axis; a biasing member configured to bias the first rolling support member from the base member toward the cylindrical member; and second rolling support members fixed on the base member to support the cylindrical member, rollable around axes parallel to the rotation center axis, and fixed in directions orthogonal to the rotation center axis, wherein the first rolling support member is disposed in a third region where a first region and a second region in a region around the rotation center axis overlap each other, the first region is closer to the abutting member with reference to a line connecting the rotation center axis with a first abutting portion where the abutting member abuts on the first rotation limiting end, and the second region is closer to the abutting member with reference to a line connecting the rotation center axis with a second abutting portion where the abutting member abuts on the second rotation limiting end, and wherein at least one of the second rolling support members is disposed in a fourth region, at least another of the second rolling support members is disposed in a fifth region, the fourth region is closer to the first rotation limiting end with reference to the line connecting the rotation center axis with the first abutting portion where the abutting member abuts on the first rotation limiting end, and the fifth region is closer to the second rotation limiting end with reference to the line connecting the rotation center axis with the second abutting portion where the abutting member abuts on the second rotation limiting end. |
