US 12,405,549 B2
Optical scanning device
Yasushi Kuribayashi, Sunto Shizuoka (JP)
Assigned to TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed by TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 3, 2023, as Appl. No. 18/177,781.
Prior Publication US 2024/0295835 A1, Sep. 5, 2024
Int. Cl. G03G 15/043 (2006.01); G02B 26/12 (2006.01); G03G 15/04 (2006.01)
CPC G03G 15/0435 (2013.01) [G02B 26/123 (2013.01); G03G 15/0409 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical scanning device, comprising:
a light source configured to emit light;
a first optical sheet disposed on an optical path of the light emitted from the light source in a state in which the first optical sheet is bent by elastic deformation;
a second optical sheet disposed on the optical path, configured to transmit the light, and bendable by elastic deformation;
a holding section including a pair of engaging members with which both end portions in a bending direction of the first optical sheet are engaged by a restoration force based on the elastic deformation of the first optical sheet and with which both end portions in a bending direction of the second optical sheet are engaged by a restoration force based on the elastic deformation of the second optical sheet in a state in which the second optical sheet is bent at a curvature different from a curvature of the first optical sheet and in a same direction as the bending direction of the first optical sheet, the holding section holding the first optical sheet and the second optical sheet in a state in which the first optical sheet and the second optical sheet are superimposed via a gap; and
a polygon mirror configured to reflect the light from the light source guided via the first optical sheet and the second optical sheet and rotate to scan a scan surface present in a reflecting direction of the light.