Patent ID: 9030765
Filing Date: 2015-05-12
Classification: G02B,G03B

Abstract:
1. An optical apparatus comprising: a first holding member holding an optical element; a second holding member holding the first holding member; and an adjustment mechanism that adjusts positions of the first holding member in a decentering correction direction and in a tilting correction direction with respect to the second holding member, wherein the adjustment mechanism comprises: a fulcrum portion provided at one place in a circumferential direction of the first and second holding members and connecting the first and second holding member to allow movements of the first holding member in the decentering correction direction and the tilting correction direction with respect to the second holding member; two decentering adjustment portions provided at two places other than that of the fulcrum portion in the circumferential direction and each causing the first holding member to move in the decentering correction direction with respect to the second holding member in response to rotation of a first adjusting member including a first rotation center portion about which the first adjusting member is rotated and a first eccentric portion eccentric with respect to the first rotation center portion; and two tilting adjustment portions provided at two places other than that of the fulcrum portion in the circumferential direction and each causing the first holding member to move in the tilting correction direction with respect to the second holding member in response to rotation of a second adjusting member provided with a second rotation center portion about which the second adjusting member is rotated and a second eccentric portion eccentric with respect to the second rotation center portion.