| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve cutting quality when processing a workpiece by applying a laser beam. <P>SOLUTION: A first pulse laser beam and a second pulse laser beam, having the same constant repetitive frequency, are superimposed and the superimposed first and second pulse laser beams are irradiated to the workpiece. The pulse string P1 of the first pulse laser beam and the pulse string P2 of the second pulse laser beam are synchronized so that the pulse string P1 of the first pulse laser beam and the pulse string P2 of the second pulse laser beam obtain a deviation time Td that is a constant relation of time. As a state of synchronization of two pulse laser beams, there are a case where a deviation time Td is Td=0 and a case where a deviation time Td is Td≠0. Therefore, depending upon the workpiece, deviation time Td=0 is selected, or deviation time Td≠0 is selected as a most suitable time to the workpiece, and then the workpiece is processed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
