| 摘要 |
<p>Method and apparatus for welding, cutting, surface machining or heat treating workpieces by a laser beam which includes providing an optical element in the path of the laser beam to modify the pattern of the laser beam such that different geometric patterns can be projected on the focal plane, and this beam pattern spans at least the width of the heat treatment, cutting, surface machining or welding zone on the workpieces.</p> |
