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公开(公告)号：US20220072661A1
公开(公告)日：2022-03-10
申请号：US17527453
申请日：2021-11-16
Inventor： JINGBO WANG , MASATOSHI NISHIO , KENZO SHIBATA , MANABU NISHIHARA
IPC: B23K26/384 , B23K26/062 , B23K26/064 , B23K26/035
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：US20190353857A1
公开(公告)日：2019-11-21
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 , B23K26/035 , B23K26/067 , B23K26/06 , B23K26/00
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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公开(公告)号：US20190278026A1
公开(公告)日：2019-09-12
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：US20190262938A1
公开(公告)日：2019-08-29
申请号：US16408681
申请日：2019-05-10
Inventor： DOUKEI NAGAYASU , HITOSHI NISHIMURA , JINGBO WANG , MAKOTO RYUDO , MASATOSHI NISHIO , HIDEAKI YAMAGUCHI , YOSHIAKI TAKENAKA , KIYOTAKA EIZUMI , RYO ISHIKAWA
Abstract: Laser processing device (1) includes: laser-beam switching apparatus (70) that switches between a first optical path and a second optical path as an optical path along which a laser beam is to travel, the first optical path including first fiber (11), the second optical path including second fiber (21) that has a core diameter that is larger than a core diameter of first fiber (11); and processing head (80) that illuminates a same processed point on workpiece (900) with a laser beam that has passed through the first optical path or the second optical path. When illumination with laser beam that has passed through the first optical path is performed for a predetermined period of time, laser-beam switching apparatus (70) switches from the first optical path to the second optical path.
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