Patent ID: 7556200

Claim:
A bar code scanner comprising: a laser for emitting a laser beam; a rotating spinner for reflecting the laser beam, the rotating spinner being placed and configured such that when the laser beam is reflected from the spinner and to and out of a scan window, the rotation of the spinner will direct the laser beam such that the laser beam sweeps across the scan window to form a scan line; a photodetector for creating a scan signal when struck by reflected light entering the scan window; and a processor for processing the scan signal to extract bar code information from the scan signal generated by a reflection of the scan line from a bar code, the processor being operative to refer to stored noise information identifying noise and conditions under which noise is susceptible to occur including information relating to rotational positions of the spinner during which each instance of noise occurs and to control the operation of the scanner so as to minimize occurrences and influences of noise during conditions under which noise is susceptible to occur.