Patent ID: 8767323

Claim:
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 another 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 another 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 and the holding member can advance or retreat in the direction of the optical axis relative to the first supporting member.