| 摘要 |
A laser processing device that includes a laser radiation device, in which said laser radiation device is configured so that the intensity distribution in the cross-section in the direction perpendicular to the scanning direction of a laser beam, which concentrates light on an oriented magnetic steel sheet, on the surface of the oriented magnetic steel sheet, is such that when Ra1 and Ra2 represent the distances between the intensity distribution center and the positions at which the integral value of the intensity from the intensity distribution center reaches 43% of the total integral intensity value, beam intensities Ia1 and Ia2 represent the intensities of the laser beam at Ra1 and Ra2, Ia represents the average value of Ia1 and Ia2, and beam intensity Ib represents the intensity of the laser beam at the intensity distribution center, Ib/Ia is equal to or less than 2.0 |
