公开(公告)号：US20220373788A1

公开(公告)日：2022-11-24

申请号：US17763808

申请日：2020-08-31

Applicant: TOYOKOH CO., LTD.

Inventor： Daisuke MORI

IPC: G02B27/00 ,  G02B26/10 ,  G02B26/12 ,  G02B5/00 ,  G02B19/00 ,  G02B26/08 ,  B23K26/70 ,  B23K26/16

Abstract: To provide a laser irradiation apparatus which suppresses adhesion of foreign matters to an optical element, a laser irradiation device includes: emission optical systems, which form a beam in which laser light generated by a laser oscillator converges on a predetermined beam spot, and continuously change an irradiation direction or the like of the beam; and a protective member which is arranged between the emission optical system and the beam spot, and protects the emission optical system from foreign matters scattered from an irradiation object side, and the protective member has an aperture through which the beam passes and moves in connection with a change of the irradiation direction or the like of the beam so that the aperture is positioned on a path of the beam.

公开(公告)号：US20230019043A1

公开(公告)日：2023-01-19

申请号：US17780278

申请日：2020-11-26

Applicant: TOYOKOH CO.,LTD.

Inventor： Kenjiro MOMI ,  Kazuhisa FUJITA ,  Manabu HARAGUCHI ,  Daisuke MORI ,  Momo TOSUE

IPC: G01N21/17 ,  H04R1/08 ,  H04R1/40 ,  H04R3/00

Abstract: Disclosed is a laser irradiation state diagnosing method which allows accurately diagnosing a laser irradiation state. When irradiating a laser beam so that an irradiation spot scans the surface of the irradiation object, acoustic information in vicinity of the irradiation spot is acquired. And based on characteristics of the acoustic information, such as an intensity of a component of a specific frequency band or a frequency band distribution, a state of peeling of the adhered substances existing on the surface of the irradiation object is determined.