| 摘要 |
<p>The invention relates to a laser light source (110) comprising a laser resonator, whereby the length thereof can be modified by means of a radiation switching device (113), such that the duration of the pulse of the emitted laser radiation can be adjusted according to the respective adjusted resonator length. The radiation switching device (113) can be produced by means of a mechanical mirror system (213). The radiation switching device (113) can also be produced by means of an electro-optical or acusto-optical modulator, such that very fast radiation switching takes place. This enables, even at a high pulse repetition rate, a switching over of the resonator length between two successive laser pulses.The invention also relates to a method for machining workpieces (150) by means of pulsed laser radiation, whereby a laser beam is deviated in a two-dimensional manner by means of a deviation unit (130) and is oriented to the workpiece (150) by means of an optical imaging lens (140). The duration of the pulses of the laser pulse is adjusted, in particular, by selecting the beam path within the laser resonator thereby ensuring optimum material removal.</p> |
