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Modular focus system for image based code readers

  • US 8,134,116 B2
  • Filed: 01/12/2009
  • Issued: 03/13/2012
  • Est. Priority Date: 01/12/2009
  • Status: Active Grant
First Claim
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1. An image-based code reader comprising:

  • a lens mount secured within a lens mount housing;

    a lens barrel rotatably received by the lens mount;

    a sensor for capturing image data reflected from a target object;

    an imager lens assembly fixedly secured within the lens barrel about an optical axis, wherein the imager lens assembly focuses the image data onto the sensor; and

    a modular focusing system including a first removable lens attachment having a focus ring disposed at a target-facing end and a flange disposed at a sensor-facing end and a second removable lens attachment comprising;

    a liquid lens secured within a liquid lens housing; and

    a pair of electrodes in electrical contact with the liquid lens;

    wherein the code reader is focused by at least one of adjusting the first lens attachment when secured to the code reader or a voltage to the liquid lens when the second lens attachment is coupled to the lens barrel.

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