公开(公告)号：US20190271588A1

公开(公告)日：2019-09-05

申请号：US16417760

申请日：2019-05-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： JINGBO WANG ,  DOUKEI NAGAYASU ,  YOSHIAKI TAKENAKA ,  HITOSHI NISHIMURA ,  MAKOTO RYUDO ,  KIYOTAKA EIZUMI ,  HIDEAKI YAMAGUCHI ,  RYO ISHIKAWA ,  MASATOSHI NISHIO ,  TAKASI KAKUTANI ,  YASUSHI MUKAI ,  MITSURU MUKAI ,  HIROYUKI HAYASHIKAWA

IPC: G01J1/42 ,  G01J1/04 ,  B23K26/00

Abstract: A laser device includes the following components: a laser resonator for emitting a laser beam; a condenser lens (21) for collecting the laser beam emitted from the laser resonator; an optical fiber (7) for transmitting the laser beam collected by the condenser lens (21); at least one light sensor (5) opposing a light receiving surface of the condenser lens (21) and outside the optical path of the laser beam, the at least one light sensor (5) detecting the amount of return light from the condenser lens (21); and a controller for determining the presence of an abnormality when the value of the amount detected by any of the at least one light sensor (5) is greater than the predetermined maximum threshold.