US 12,459,055 B2
Laser irradiation apparatus and laser irradiation method
Hiroyuki Tanabe, Tokyo (JP); Kazunori Watanabe, Tokyo (JP); and Keiichi Serizawa, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Hiroyuki Tanabe, Tokyo (JP); Kazunori Watanabe, Tokyo (JP); and Keiichi Serizawa, Kanagawa (JP)
Filed on Sep. 28, 2022, as Appl. No. 17/936,071.
Claims priority of application No. 2021-198934 (JP), filed on Dec. 8, 2021.
Prior Publication US 2023/0173610 A1, Jun. 8, 2023
Int. Cl. B23K 26/08 (2014.01); B23K 26/03 (2006.01); B41M 5/24 (2006.01); G05B 19/402 (2006.01)
CPC B23K 26/0823 (2013.01) [B23K 26/03 (2013.01); B41M 5/24 (2013.01); G05B 19/402 (2013.01); G05B 2219/37288 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A laser irradiation apparatus comprising:
a laser device configured to emit a laser beam to an object conveyed in a conveyance direction, the object having a polygonal columnar shape including a flat surface;
a rotation detector configured to detect rotation of the object to obtain rotation information of the object; and
circuitry configured to control the laser device to irradiate the object with the laser beam based on the rotation information of the object detected by the rotation detector,
wherein the circuitry is further configured to control a timing at which the laser device starts irradiating the object that rotates around an axis along a direction orthogonal to the conveyance direction based on a rotation amount of the flat surface of the object in the conveyance direction, and
wherein in a case in which the object rotates such that an upstream side of the flat surface of the object in the conveyance direction is closer to the laser device than a downstream side of the flat surface of the object in the conveyance direction, the circuitry is further configured to make the timing at which the laser device starts irradiating the object earlier than a case in which the flat surface is parallel to the conveyance direction.