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Spectral scanner employing light paths of multiple wavelengths for scanning objects, such as bar code symbols, and associated method

  • US 6,345,765 B1
  • Filed: 06/30/2000
  • Issued: 02/12/2002
  • Est. Priority Date: 06/30/2000
  • Status: Expired due to Term
First Claim
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1. A reader for reading a bar code symbol, comprising:

  • a housing;

    a light source at least partially retained by the housing and projecting light of a plurality of wavelengths therefrom;

    a prism positioned with respect to the housing to receive the light from the light source and produce a plurality of paths of light based on the plurality of wavelengths of the light, wherein the plurality of paths of light impinge on the bar code symbol external to the housing;

    at least one light detector secured to the housing that receives light reflected from the bar code symbol and produces an output signal based on the light reflected from the bar code symbol, wherein the light reflected from the bar code symbol represents bars and spaces in the bar code symbol and the plurality of wavelengths of the light; and

    a microprocessor coupled to the light source and the light detector that receives the output signal from the light detector and decodes the bar code symbol based on the output signal.

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