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Integrated illumination assembly for symbology reader

  • US 9,405,951 B2
  • Filed: 10/08/2010
  • Issued: 08/02/2016
  • Est. Priority Date: 10/24/2005
  • Status: Active Grant
First Claim
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1. An illumination assembly for a mark reader comprising:

  • a passive light transmitter including an inner lumen through which at least a portion of a mark is detectable, the passive light transmitter having a proximal end and a distal end, the distal end comprising a chamfered surface, the chamfered surface having a diffusive surface texture;

    at least one light element positioned adjacent the proximal end and adapted to transmit light into the proximal end, at least a portion of the transmitted light internally reflecting through the light transmitter to the chamfered surface and, at the chamfered surface, reflecting out of the light transmitter through an interior wall of the light transmitter facing the inner lumen as dark field illumination; and

    at least a different portion of the transmitted light internally reflecting through the light transmitter to the chamfered surface and being refracted out of the light transmitter and through the diffusive surface texture of the chamfered surface as bright field illumination.

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