US 12,174,452 B2
Mirror support mechanism and optical device
Tomoya Hattori, Tokyo (JP); Takayuki Sakai, Tokyo (JP); Atsumu Oikawa, Tokyo (JP); and Kouichi Takeda, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/273,551
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jan. 28, 2022, PCT No. PCT/JP2022/003272
§ 371(c)(1), (2) Date Jul. 21, 2023,
PCT Pub. No. WO2022/163804, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 2021-013160 (JP), filed on Jan. 29, 2021.
Prior Publication US 2024/0085663 A1, Mar. 14, 2024
Int. Cl. G02B 7/183 (2021.01); G02B 23/02 (2006.01); G02B 23/16 (2006.01)
CPC G02B 7/183 (2013.01) [G02B 23/02 (2013.01); G02B 23/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mirror support mechanism comprising:
three first supporting members each including a mirror supporting portion and two first beam portions, the mirror supporting portion being in contact with a corresponding one of three supported surfaces to support the corresponding supported surface, the three supported surfaces being provided on a side surface of a supported portion of a reflecting mirror with rotational symmetry of 120 degrees around an optical axis, the reflecting mirror including a reflecting surface to reflect light and the supported portion being protrusion provided at a center of a rear surface being a surface of the reflecting mirror existing on the contrary side to the reflecting surface, and the two first beam portions each being connected to each side of the mirror supporting portion, the three first supporting members each being arranged in one straight line or a polygonal line as viewed from the direction of an optical axis; and
three second supporting members each including a supporting portion to which ends of two of the three first beam portions are connected, the ends being located adjacent to each other, each of the ends being not connected to the mirror supporting portion, and two second beam portions each being connected to each side of the supporting portion, and an end of the second beam portion not connected to the supporting portion being supported by a structure member provided on the rear side of the reflecting mirror, the three second supporting members each being arranged in one straight line or a polygonal line as viewed from the direction of the optical axis.