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OPTICAL-INFORMATION-READING APPARATUS

  • US 20120261474A1
  • Filed: 04/30/2012
  • Published: 10/18/2012
  • Est. Priority Date: 10/30/2009
  • Status: Active Grant
First Claim
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1. An optical-information-reading apparatus comprising:

  • an imaging optical system including a varifocal lens which adjusts a focal position;

    an image sensor that images an imaging target of which the imaging optical system performs an image formation;

    a distance-measuring system that measures the distance to the imaging target; and

    a control unit that is operable to;

    (i) calculate the distance to the imaging target using the distance-measuring system,(ii) control the imaging optical system based on calculated distance information to perform the image formation of the imaging target on the imaging means, and(iii) control the imaging means to image the imaging target, wherein;

    the control unit calculates the distance to the imaging target using a distance measurement parameter that is characteristic of the apparatus and which has been previously been determined and stored in a memory that is accessible to the control unit.

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