公开(公告)号：US20220176488A1

公开(公告)日：2022-06-09

申请号：US17679159

申请日：2022-02-24

Applicant: Panasonic Intellectual Property management Co., Ltd.

Inventor： NAOYA KATO ,  TAKAYUKI YAMASHITA ,  RYO ISHIKAWA

IPC: B23K26/064 ,  B23K26/042 ,  B23K26/03

Abstract: Reference light receiver (300) receives reference light (RL) reflected by second reflecting surface (200b) of folding mirror (200). Partial light receiver (600) receives a part of laser light (LB) reflected by partial reflection mirror (500). Controller (14) detects an abnormality in an inclination angle of first reflecting surface (200a) of folding mirror (200) with respect to an optical path of laser light (LB) incident on first reflecting surface (200a) of folding mirror (200) based on an output of reference light receiver (300), and detects an abnormality in a spot of laser light (LB) on an irradiated object based on an output of partial light receiver (600).