| 摘要 |
<p>A beam shaping device (20) for a laser device having a beam (32-40) with a beam quality factor Mx2 in one direction and a beam quality factor M¿y?2 in an orthogonal direction, comprises a plurality of substantially parallel reflecting surfaces (22, 24) defining a plurality of different propagation paths through the beam shaping device, each path involving a respective different number of reflections between the reflecting surfaces, so that, in use, portions of an input beam from the laser device entering the beam shaping device follow respective different propagation paths and are reconfigured to form an output beam in which one of the beam quality factors M¿x?2 and M¿y?2 is decreased.</p> |
