| 摘要 |
<p>An apparatus for cutting a workpiece comprises optical means (4) located in a single cutting head (6) for splitting a beam of laser energy into two separate beams (8,10). The cutting head (6) includes an inlet (16) for oxygen under pressure and a nozzle (14) for the outlet of the oxygen. At least one split beam (8) is focused at a location above the surface of the workpiece such that when in use the area on the surface of the workpiece impinged by the split beam (8) is greater than the area being impinged upon by the oxygen when leaving the nozzle (14). <IMAGE></p> |
