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Decodable indicia reading terminal with combined illumination

  • US 8,985,459 B2
  • Filed: 06/30/2011
  • Issued: 03/24/2015
  • Est. Priority Date: 06/30/2011
  • Status: Active Grant
First Claim
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1. A decodable indicia reading terminal comprising:

  • a laser-based scanner disposed within a housing, said decodable indicia reading terminal defining a horizontal surface, said laser-based scanner including a laser source configured to emit a laser beam onto a substrate bearing decodable indicia, a photo-detector configured to receive a second beam of a variable intensity reflected by said decodable indicia and to output a first analog signal representative of said variable intensity, and a first analog-to-digital (A/D) converter configured to convert said first analog signal into a first digital signal representative of said first analog signal;

    an imager-based scanner disposed within said housing, said imager-based scanner including a multiple pixel image sensor, an imaging lens configured to focus an image of said decodable indicia on said image sensor, and a second A/D converter configured to convert into a second digital signal a second analog signal read out of said image sensor, said second analog signal representative of light incident on said image sensor, said second digital signal representative of said second analog signal;

    a central processing unit (CPU) configured to output a decoded message data corresponding to said decodable indicia by processing at least one of;

    said first digital signal, said second digital signal;

    an illumination assembly including an indicator light bar configured to emit first light having a first wavelength, and an illumination light bar configured for illuminating said substrate, by emitting second light having a second wavelength;

    wherein the decodable indicia reading terminal is configured so that the indicator light bar is capable of being in an on state with the illumination bar being in an off state;

    wherein said first wavelength is substantially equal to said second wavelength;

    wherein the decodable indicia reading terminal includes optics for diffusing said first light; and

    wherein the indicator light bar is located spatially close to the illumination light bar such that the indicator light bar camouflages the illumination light bar.

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