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Three dimensional digitizer with electromagnetic coupling

  • US 4,613,866 A
  • Filed: 05/13/1983
  • Issued: 09/23/1986
  • Est. Priority Date: 05/13/1983
  • Status: Expired due to Term
First Claim
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1. A three dimensional digitizer for establishing a digital database comprising:

  • a plurality of radiating means for radiating electromagnetic energy, said radiating means having independent components defining a reference coordinate frame;

    a transmitter means for applying to said plurality of radiating means electrical signals which generate a plurality of radio frequency electromagnetic fields, said electromagnetic fields being distinguishable from one another;

    a means for identifying the coordinates to be digitized;

    a plurality of receiving means for receiving said transmitted electromagnetic fields, said receiving means being disposed on said means for identifying and said receiving means having a plurality of independent components for detecting each of said transmitted electromagnetic fields; and

    analyzing means for receiving the output of said receiving means and converting the components of said transmitted electromagnetic fields received by said receiving means into receiving means position and orientation, and thus determining the coordinates to be digitized and compensating for any offset between said means for identifying and said receiving means.

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