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Bar code scanner utilizing time-multiplexed scan lines

  • US 5,912,450 A
  • Filed: 05/28/1997
  • Issued: 06/15/1999
  • Est. Priority Date: 03/13/1990
  • Status: Expired due to Fees
First Claim
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1. A bar code reader, comprising:

  • a) a scanning light beam generator for producing two scan patterns to successively impinge on a bar code symbol to be read;

    b) a controller for successively activating the generator to produce the scan patterns at different times;

    c) a photodetector for generating an electrical signal responsive to light reflected from the symbol by each of the scan patterns at each of said times;

    d) a decoder for decoding the electrical signal from at least one of the scan patterns into data corresponding to the symbol being read; and

    e) a switching circuit for alternately switching to the decoder each electrical signal generated by the photodetector in response to light reflected from the symbol by the scan patterns.

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