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Illumination assemblies for use in barcode readers and devices and methods associated therewith

  • US 10,268,854 B1
  • Filed: 04/13/2018
  • Issued: 04/23/2019
  • Est. Priority Date: 04/13/2018
  • Status: Active Grant
First Claim
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1. An illumination assembly for use in a barcode reader, comprising:

  • an illumination source operable to emit an illumination light along a first path, the illumination light having a central axis;

    a lens positioned within the first path of the illumination light,the lens configured to redirect the central axis resulting in a redirected central axis and propagate the illumination light along a second path, the central axis and the redirected central axis being non-parallel with respect to each other, the redirected central axis defining a line of intersection between a first plane and a second plane, the first plane being perpendicular to the second plane,the lens including a first lens surface proximal to the illumination source, the first lens surface being positioned within the first path and being defined by a first freeform polynomial,the lens further including a second lens surface distal to the illumination source, the second lens surface being positioned within the second path and being defined by a second freeform polynomial; and

    a window positioned within the second path of the illumination light, the window including a first window-portion and a second window-portion,the first window-portion being configured to propagate a first portion of the illumination light along a third path, the first portion of the illumination light being a portion of the of the illumination light that impinges on the first window-portion, the third path having a divergence angle of at least 25 degrees along the first plane and a divergence angle of at most 8 degrees along the second plane,the second window-portion configured to propagate a second portion of the illumination light along a fourth path, the second portion of the illumination light being a portion of the of the illumination light that impinges on the second window-portion, the fourth path having a divergence angle of at most 20 degrees along the first plane and a divergence angle of at most 8 degrees along the second plane.

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