| 摘要 |
PROBLEM TO BE SOLVED: To provide as a high-power laser machine a machine that can compensate a thermal lens characteristic without the necessity of a special drive mechanism and special control mechanism, can readily perform high-precision laser machining, and can be manufactured at a low cost.SOLUTION: In a high-power laser machine having a scraper 2, which includes a full-reflection film, in a laser optical path, a thermal lens action on a converging side exerted by optical components other than the scraper 2 intervened in the laser optical path is canceled out by a thermal lens action on a diffusing side due to a change in a curvature of a reflection surface 2a derived from thermal expansion of the scraper 2 that has absorbed laser light, and a thermal lens characteristic of the entire laser machine is thus compensated. |
