A scan pattern generator for use in a bar code reader which uses a single drive (one coil and one magnet) to produce movement of a reflective surface so as to produce an oscillating movement of the surface in two directions, thereby forming a raster-type scanning pattern when a light beam is reflected...http://www.google.fr/patents/US5280165?utm_source=gb-gplus-shareBrevet US5280165 - Scan pattern generators for bar code symbol readers
Scan pattern generators for bar code symbol readers
