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Optical digitizer with improved distance measurement capability

  • US 8,687,172 B2
  • Filed: 04/12/2012
  • Issued: 04/01/2014
  • Est. Priority Date: 04/13/2011
  • Status: Active Grant
First Claim
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1. A method of determining spatial coordinates in three dimensional space, comprising:

  • obtaining initial spatial coordinate values for an object in three dimensions using a signal received from one or more markers associated with the object by an optical sensor system;

    separately measuring a distance to the object using a separate non-contact distance measurement device, wherein the separately measuring a distance to the object is performed separately from the obtaining initial spatial coordinate value for the object in the three dimensions; and

    combining the initial spatial coordinate values for the object in the three dimensions with the separately measured distance to obtain spatial coordinate values for the three dimensions.

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