| 摘要 |
<p>In a method of raster scanning a photosensitive material using a modulated laser beam, the beam is split into a plurality of independent beams which are independently modulated. As shown, a beam from a laser 10 is passed to a workpiece 34 via a splitter 13, acousto-optic modulator 16, dove prism 17 (to prevent interference), rotating polygon mirror 24, F-thete lens 26 and beam splitter 28 (to provide beams for (a) system control and (b) workpiece location). <IMAGE></p> |
