| 摘要 |
<p>A raster scanner (10) with laser (22) for generating a scanning beam (32) and compact, folded optical system (24, 30, 33, 36, 47) for transmitting the beam to an object (12) to be scanned. The optical system includes a first mirror (24) for guiding the laser beam to a modulator (27), a second mirror (30) beyond the modulator for intercepting the beam from the modulator and guiding it to a mirror (33) which guides the beam to the mirrored facets of a rotary polygon (35), the polygon scanning the beam through a preset scan arc and returning the beam via a focusing lens (45) to the third mirror, the third mirror reflecting the beam onto a fourth mirror (47) guiding the beam to the object (12).</p> |
