| 摘要 |
PROBLEM TO BE SOLVED: To excellently cut a thick plate by restricting expansion of a laser light even in a remote area in an optical axis moving type laser processing device. SOLUTION: On an optical of a laser light LB, the laser light LB is reflected by an incident bend mirror 15, and is incident on a curvature variable mirror 13 at an regulation angle regulated in advance, for example, at an incident angle θ of 10 deg. or less. Thereby, for the reason of a spherical aberration and the like, deterioration (degradation) of beam quality of the laser light LB ejected from the mirror 13 is prevented, and the beam diameter is changed/adjusted by the curvature variable mirror 13. Since the incident bend mirror 15 and the curvature variable mirror 13 are integrally constituted as a mirror block 17, they are easily assembled in any place on the optical path of the laser light LB. |
