Back to results
US 2012/0257294 A1Published application
Optical apparatus
AssigneeCanon Kabushiki Kaisha
InventorSeiichi Kashiwaba
Life of this patent
Estimating the term…
Abstract
A rotation of a first eccentric member adjusts a parallel eccentricity of an optical element held by a holding member, rotation of a second eccentric member adjusts a tilt eccentricity of the optical element held by a holding member, and change of a position of an engaging member and a position where the second eccentric member is engaged with a second groove portion adjusts a position of the optical element in the direction of an optical axis.
Claims12
An optical apparatus comprising:
- a first supporting member including a first groove portion extending in a direction of an optical axis;
- a second supporting member including a second groove portion extending in a direction inclined toward the direction of the optical axis and a third groove portion extending in a direction orthogonal to the optical axis;
- a holding member configured to hold an optical element;
- a first eccentric member having one end being rotatably attached to the holding member with a rotational axis in the direction orthogonal to the optical axis as a center and an other end being decentered with respect to the rotational axis and engaged with the first groove portion;
- a second eccentric member having one end being rotatably attached to the holding member with a rotational axis in the direction orthogonal to the optical axis as a center and an other end being decentered with respect to the rotational axis and engaged with the third groove portion;
- and
- an engaging member provided on the first supporting member and engaged with the second groove portion;
- wherein the first eccentric member is rotated with the rotational axis as a center so the optical element moves in the direction orthogonal to the optical axis relative to the first supporting member,
- wherein the second eccentric member is rotated with the rotational axis as a center so the optical element tilts with respect to the plane orthogonal to the optical axis, and
- wherein a position where the engaging member is engaged with the second groove portion is changed so the second supporting member moves in the direction of the optical axis relative to the first supporting member.
7 more elements
An optical apparatus comprising:
- a first supporting member including a first groove portion extending in a direction of an optical axis;
- a second supporting member including a second groove portion extending in a direction inclined toward the direction of the optical axis;
- a holding member configured to hold an optical element;
- a first eccentric member having one end being rotatably attached to the holding member with a rotational axis in the direction orthogonal to the optical axis as a center and an other end being decentered with respect to the rotational axis and engaged with the first groove portion;
- a second eccentric member having one end being rotatably attached to the holding member with a rotational axis in the direction orthogonal to the optical axis as a center and an other end being decentered with respect to the rotational axis and engaged with the second groove portion;
- a fourth groove provided on one of the first supporting member or the second supporting member and extending in a circumferential direction, which is orthogonal to the optical axis;
- and
- a regulating member provided on the other one of the first supporting member or the second supporting member and engaging with the fourth groove to regulate the movement of the second supporting member to the direction of the optical axis relative to the first supporting member;
- wherein the first eccentric member is rotated with the rotational axis as a center so the optical element moves in the direction orthogonal to the optical axis relative to the first supporting member,
- wherein the second eccentric member is rotated with the rotational axis as a center so the optical element tilts with respect to the plane orthogonal to the optical axis, and
- wherein a position where the second eccentric member is engaged with the second groove portion is changed so the holding member moves in the direction of the optical axis relative to the first supporting member.
8 more elements
An optical apparatus comprising:
- a first cylindrical member including a guide groove extending in a direction of an optical axis on an outer circumference portion of the first cylindrical member;
- a second cylindrical member rotatable around the optical axis with respect to the first cylindrical member and including a peripheral groove extending in a circumferential direction orthogonal to the optical axis and a lead groove extending obliquely in a circumferential direction orthogonal to the optical axis on the outer circumference portion of the second cylindrical member;
- a holding member configured to hold an optical element;
- a first eccentric roller having one end rotatably attached to the holding member with a rotational axis orthogonal to the optical axis as a center and an other end being decentered from the rotational axis and engaged with the guide groove;
- a second eccentric roller having one end being rotatably attached to the holding member having a rotational axis orthogonal to the optical axis as a center and an other end being decentered from the rotational axis and engaged with the peripheral groove;
- and
- a roller provided on the first cylindrical member and engaged with the lead groove.
4 more elements
An optical apparatus comprising:
- a first cylindrical member including a guide groove extending in a direction of an optical axis on outer circumference portion of the first cylindrical member;
- a second cylindrical member rotatable around the optical axis with respect to the first cylindrical member and including a lead groove extending obliquely in a circumferential direction orthogonal to the optical axis on an outer circumference of the second supporting member;
- a holding member configured to hold an optical element;
- a first eccentric roller having one end rotatably attached to the holding member with a rotational axis orthogonal to the optical axis as a center and an other end decentered from the rotational axis and engaged with the guide groove;
- a second eccentric roller having one end rotatably attached to the holding member with a rotational axis orthogonal to the optical axis as a center and an other end decentered from the rotational axis and engaged with the lead groove;
- a regulating groove provided on one of the first cylindrical member or the second cylindrical member and extending in a circumferential direction orthogonal to the optical axis;
- and
- a regulating member provided on the other one of the first cylindrical member or the second cylindrical member and engaging with the regulating groove to regulate a movement of the second cylindrical member in the direction of the optical axis relative to the first cylindrical member.
5 more elements
Dependencies are inferred from the claim text.