US 11,911,845 B2
Lightguide device and laser processing device
Mutsuhiro Nakazawa, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Appl. No. 17/250,248
Filed by KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
PCT Filed Jun. 19, 2019, PCT No. PCT/JP2019/024302
§ 371(c)(1), (2) Date Dec. 21, 2020,
PCT Pub. No. WO2020/004177, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 2018-119597 (JP), filed on Jun. 25, 2018.
Prior Publication US 2021/0260695 A1, Aug. 26, 2021
Int. Cl. B23K 26/082 (2014.01); B23K 26/38 (2014.01); G02B 26/12 (2006.01); B23K 101/18 (2006.01)
CPC B23K 26/0821 (2015.10) [B23K 26/38 (2013.01); G02B 26/124 (2013.01); G02B 26/125 (2013.01); B23K 2101/18 (2018.08)] 5 Claims
OG exemplary drawing
 
1. A light guide device, comprising:
a first light guide part reflecting and guiding light emitted from a light source;
a rotatable polygon mirror including a first reflective part and a second reflective part, each of the first and second reflective parts including an upstream reflective surface and a downstream reflective surface each configured to reflect the light guided by the first light guide part such that an optical axis of the light offsets in a rotation axis direction; and
a second light guide part reflecting the light reflected by the first and second reflective parts of the polygon mirror and guiding the light so that the light is irradiated to an irradiation target at each of the first and second reflective parts,
wherein a first position of the first reflective part is indicative of (A) a first boundary position between the upstream reflect surface of the first reflective part and the downstream reflective surface of the first reflective part and (B) a first position on a central axis of the polygon mirror,
wherein a second position of the second reflective part is indicative of (A) a second boundary position between the upstream reflect surface of the second reflective part and the downstream reflective surface of the second reflective part and (B) a second position on the central axis of the polygon mirror, and
wherein the first position of the first reflective part is different from the second position of the second reflective part.