The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2025
Filed:
May. 13, 2020
Nippon Steel Corporation, Tokyo, JP;
Hideyuki Hamamura, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A groove processing device that forms a groove in an object's surface using laser beams includes: a light source device that outputs the laser beams; a polygon mirror that reflects the laser beams that are output; a condensing optical system provided on an optical path of the laser beams that are reflected and focuses the laser beams; and a shielding plate provided between the condensing optical system and the object at a position which blocks some of the laser beams and blocks some of the laser beams. Among the laser beams that are focused, some that are not blocked form the groove in the surface of the object at a focus. The shielding plate is provided closer to the condensing optical system than the focus and is rotated with respect to the object's surface to block the laser beams that do not form the groove.