A compact scan module including a resonantly driven dithering assembly employing feedback and/or travel stops for scanning an illumination beam of a barcode scanner. In one construction the dithering assembly includes one or more travel stops to limit the motion of the mirror assembly with the two travel...http://www.google.com/patents/US6152372?utm_source=gb-gplus-sharePatent US6152372 - Dithering assemblies for barcode scanners
