公开(公告)号：US10315274B2

公开(公告)日：2019-06-11

申请号：US15040357

申请日：2016-02-10

Applicant: nLIGHT Inc.

Inventor： Xiaojun Li ,  R. Kirk Price ,  Jason N. Farmer ,  Ethan A. McGrath

IPC: B23K26/18 ,  B41J2/44 ,  B41M5/26 ,  B23K26/356 ,  B23K26/359 ,  B23K26/0622 ,  B23K26/082 ,  B41J2/47

Abstract: A laser marking method and system, and laser marked object are disclosed. The method includes directing a pulsed laser beam towards an object such that an interface between an oxidized layer and non-oxidized substrate is in a mark zone of the pulsed laser beam, and scanning the pulsed laser beam across the object in a predetermined pattern to create a mark having an L value of less than 40 and a surface roughness that is substantially unchanged compared to adjacent unmarked areas. The system includes a fiber laser generating amplified pulses that are directed towards a galvo-scanner and focusing optic, while the object includes an oxidized surface layer, an underlying non-oxidized substrate, and a mark having an L value of less than 40 with substantially unchanged roughness features.