| 摘要 |
Systems and techniques for improved accuracy of bar code detection and decoding are described. A bar code scanner employs a rotating spinner to reflect a laser beam used to produce one or more scan patterns emerging from scan windows. The spinner has reflective surfaces, with one or more of the surfaces exhibiting variations influencing characteristics of the laser beam as it is reflected from the surfaces. The scanner produces a scanner signal in response to light entering the scan windows, and processes the scanner signal to detect and decode bar codes within a scan field of the scanner. The rotational position of the spinner is continuously monitored and adjustments to processing parameters are made and other actions are taken based on the rotational position of the spinner, in order to compensate for variations in the scan pattern caused by the variations in the surfaces of the spinner.
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