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公开(公告)号：US12263541B2
公开(公告)日：2025-04-01
申请号：US17527495
申请日：2021-11-16
Inventor： Jingbo Wang , Masatoshi Nishio , Kenzo Shibata , Manabu Nishihara
IPC: B23K26/384 , B23K26/035 , B23K26/062 , B23K26/064
Abstract: A laser processing device includes a laser oscillator, optical fiber (90), beam control mechanism (20), and a laser light emitting head. The laser oscillator includes first and second laser oscillation units that generate first and second laser light rays (LB1) and (LB2), respectively. Beam control mechanism (20) includes optical path changing and holding mechanism (40) that is disposed between second condenser lens (32) that condenses second laser light (LB2) and dichroic mirror (33) that multiplexes first and second laser light rays (LB1) and (LB2) and causes the multiplexed light to be incident on optical fiber (90). Beam control mechanism (20) changes an incident position of second laser light (LB2) on optical fiber (90).
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公开(公告)号：US12263540B2
公开(公告)日：2025-04-01
申请号：US17527453
申请日：2021-11-16
Inventor： Jingbo Wang , Masatoshi Nishio , Kenzo Shibata , Manabu Nishihara
IPC: B23K26/384 , B23K26/035 , B23K26/062 , B23K26/064
Abstract: A laser processing device includes a laser oscillator, an optical fiber that is a multi-clad fiber, a beam control mechanism provided in the laser oscillator, and a laser light emitting head attached to the optical fiber. The beam control mechanism includes a condenser lens, an optical path changing and holding mechanism that is disposed between the condenser lens and an incident end face of the optical fiber and changes an optical path of laser light LB, and a controller that controls an operation of the optical path changing and holding mechanism. The beam control mechanism controls a power distribution of the laser light by changing an incident position of the laser light on the incident end face.
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公开(公告)号：US11896929B2
公开(公告)日：2024-02-13
申请号：US17103021
申请日：2020-11-24
Inventor： Makoto Ryudo , Masatoshi Nishio , Jingbo Wang
CPC classification number: B01D53/0454 , B01D53/261 , H01S5/068 , B01D2257/80 , B01D2259/45 , H01S5/02423
Abstract: A laser device includes a laser oscillator, a dehumidifier, and a controller controlling an operation of the dehumidifier. The controller controls the dehumidifier such that the dew point inside the laser oscillator is lower than the first dew point when a monolayer or less of water molecules is adsorbed, or such that the dew point is equal to or higher than the second dew point when more than a monolayer of water molecules is adsorbed inside the laser oscillator, and is lower than the third dew point at which the dew condensation starts to occur inside the laser oscillator.
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公开(公告)号：US11285564B2
公开(公告)日：2022-03-29
申请号：US16476075
申请日：2017-11-20
Inventor： Makoto Ryudo , Doukei Nagayasu , Hitoshi Nishimura , Jingbo Wang , Masatoshi Nishio , Hideaki Yamaguchi , Yoshiaki Takenaka , Kiyotaka Eizumi , Ryo Ishikawa
Abstract: A laser processing head includes parallel plate (17) that shifts an optical axis of a laser beam to be emitted from a top to a bottom of body case (6) from a first optical axis to a second optical axis, parallel plate (19) that shift the optical axis of the laser beam from the second optical axis to a third optical axis, and body case (6) that accommodates holders (7 and 18) that respectively hold parallel plates (17 and 19). The laser processing head further includes a rotation mechanism that rotates holders (7 and 18) around a first rotary axis. Opening (7a) that a laser beam reflected by an incident surface of second parallel plate (19) passes through is formed in holder (7), and light receiving part (6a) that receives the laser beam having passed through opening (7a) is disposed in body case (6).
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公开(公告)号：US10732365B2
公开(公告)日：2020-08-04
申请号：US16461637
申请日：2017-11-27
Inventor： Ryo Ishikawa , Makoto Ryudo , Doukei Nagayasu , Hitoshi Nishimura , Jingbo Wang , Masatoshi Nishio , Hideaki Yamaguchi , Yoshiaki Takenaka , Kiyotaka Eizumi
IPC: G02B6/42 , G02B6/02 , B23K26/035 , B23K26/00 , B23K26/06 , B23K26/067
Abstract: A condenser lens for collecting a laser beam (300) is disposed between the laser oscillator and the incident end surface of the optical fiber. The laser beam (300) is divided into a plurality of beams (303, 304). The power of the laser beam (304) is measured and maximized by adjusting the position of the condenser lens. The FFP of the laser beam (303) is measured and minimized by adjusting the position of the condenser lens. These adjusted positions are stored as the first and second lens positions. The FFP of the laser beam (303) is measured while the condenser lens is being moved between these positions so as to make the BPP not more than a predetermined value.
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Patent Agency Ranking
公开(公告)号：US11333833B2
公开(公告)日：2022-05-17
申请号：US16466404
申请日：2017-11-29
Inventor： Kiyotaka Eizumi , Makoto Ryudo , Doukei Nagayasu , Hitoshi Nishimura , Jingbo Wang , Masatoshi Nishio , Hideaki Yamaguchi , Yoshiaki Takenaka , Ryo Ishikawa
Abstract: There is provided an optical axis alignment mechanism between the laser oscillator and the optical fiber. The laser oscillator emits laser light, which then emerges from the emission end of the optical fiber via the axis alignment mechanism. Part of the laser light is received on the light-receiving surface of the CCD camera of a laser light evaluator. Thus, the laser light evaluator acquires a light intensity distribution. The light intensity distribution is used by the optical axis alignment mechanism to align the axis of the laser oscillator with the axis of the optical fiber.
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公开(公告)号：US10955618B2
公开(公告)日：2021-03-23
申请号：US16426699
申请日：2019-05-30
Inventor： Masatoshi Nishio , Hitoshi Nishimura , Jingbo Wang , Makoto Ryudo , Doukei Nagayasu , Hideaki Yamaguchi , Yoshiaki Takenaka , Kiyotaka Eizumi , Ryo Ishikawa , Yasushi Mukai
Abstract: A fiber coupling device (100) includes the following components: a wedge plate (102) for receiving light and refracting the light in a predetermined direction, a condenser lens (104) for collecting the light refracted by the wedge plate (102); and an optical fiber (107) having an incident surface for receiving the light collected by the condenser lens (104). The wedge plate (102) is held rotatable around the optical axis (200) of the light incident on the wedge plate (102). The light refracted by the wedge plate (102) and collected by the condenser lens (104) is incident on a different point on the incident surface depending on the rotation angle of the wedge plate (102).
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公开(公告)号：US10751833B2
公开(公告)日：2020-08-25
申请号：US16072232
申请日：2017-03-07
Inventor： Doukei Nagayasu , Hitoshi Nishimura , Makoto Ryudo , Jingbo Wang , Yoshiaki Takenaka , Kiyotaka Eizumi , Hideaki Yamaguchi , Ryo Ishikawa , Masatoshi Nishio
IPC: B23K26/035 , B23K26/064 , H01S3/10 , G02B6/28 , G02B6/42
Abstract: A fiber coupling device includes a housing and a window provided in the housing. The fiber coupling device is configured to collectively guide plural laser beams to at least a first fiber, the plurality of laser beams each being emitted from a corresponding one of plural external laser light sources and entering through a laser beam inlet. The housing is configured such that the laser beams enter the housing from the laser beam inlet. The window is provided inside the housing and faces the laser beam inlet. The fiber coupling device is not required to detach when an optical axis is adjusted.
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公开(公告)号：US12296405B2
公开(公告)日：2025-05-13
申请号：US17541166
申请日：2021-12-02
Inventor： Jingbo Wang , Masatoshi Nishio , Kenzo Shibata , Manabu Nishihara
IPC: B23K26/21
Abstract: Laser welding device (1000) includes: laser oscillator (100); optical fiber (300) that transmits a laser beam (LB) generated in laser oscillator (100); laser beam emitting head (400) that is attached to the emission end of optical fiber (300) and emits laser beam (LB) toward workpiece (600); manipulator (500) with laser beam emitting head (400) attached thereto; and controller (200) that controls laser beam emitting head (400) so as to cause laser beam (LB) to be scanned three-dimensionally on the surface of workpiece (600). Controller (200) controls laser beam emitting head (400) so as to change a focal position of laser beam (LB) in accordance with a shape of a welded portion in workpiece (600).
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公开(公告)号：US11806812B2
公开(公告)日：2023-11-07
申请号：US17162510
申请日：2021-01-29
Inventor： Masatoshi Nishio , Jingbo Wang , Hitoshi Nishimura , Motoki Morioka
IPC: B23K26/70 , B23K26/082 , B23K26/06 , B23K26/38
CPC classification number: B23K26/705 , B23K26/0648 , B23K26/082 , B23K26/38 , B23K26/707
Abstract: A detector is configured to detect an output of a reflected beam from an exit end surface of a parallel plate. A determination unit is configured to determine that an abnormality occurs in the parallel plate when a detection value of the detector is smaller than a determination threshold.
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