| 摘要 |
<p>Optical scanning system to scan a code on an object comprising a laser source (1), a laser beam shaper (2) receiving a laser beam from said laser source and focussing the laser beam on the object, a mirror polygon (4) having facets (6-9), of which at least one is reflective, and being rotated by a motor (5), a mirror array (10) surrounding the polygon (4) arranged in such a way that the laser beam will generate a scanning pattern (3) on the code to be detected, and a detector (24) receiving the light scatterred by the object, in which system the mirror array (10) is substantially entirely surrounding the polygon (4); the polygon (4) is designed to perform an optical chopper function, in such a way that during one rotation cycle of the polygon (4) each mirror (11-22; 61-75) of the mirror array (10) will at least once receive the laser beam and generate its own scanning line. <IMAGE></p> |
