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Distortion immune magnetic field generator for magnetic tracking systems and method of generating magnetic fields

  • US 20010045826A1
  • Filed: 03/15/2001
  • Published: 11/29/2001
  • Est. Priority Date: 03/16/2000
  • Status: Abandoned Application
First Claim
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1. A magnetic field generator tablet, comprising:

  • a) a first layer of material that is magnetically conductive, said first layer of material having a first major surface and a second major surface opposite said first major surface;

    b) a plurality of magnetic field generators located proximate said first layer of material, each of said generators having a coil or coil equivalent capable of generating a magnetic field, said coil or coil equivalent having a major plane extending substantially parallel to said first major surface; and

    c) wherein said first layer of material has a thickness and a relative permeability μ

    r selected so that said first layer of material substantially prevents said magnetic fields from extending through said first layer of material and past said second major surface.

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