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Magnetic position and orientation measurement system with magnetic field permeable attenuator

  • US 6,784,660 B2
  • Filed: 03/18/2002
  • Issued: 08/31/2004
  • Est. Priority Date: 03/18/2002
  • Status: Active Grant
First Claim
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1. In a magnetic position and orientation measurement system, the improvement comprising means for containing a magnetic field used to conduct measurements of position and orientation of an object, said containing means comprising a magnetic field permeable attenuator located adjacent a region where position and orientation of said object is being measured by a magnetic field, said attenuator attenuating said magnetic field on a side of said attenuator remote from said region, said system including a transmitter located on a side of said attenuator opposite said remote side, and a compensation coil at least partially surrounding said attenuator, and operated concurrently with operation of each transmitter coil to reduce magnetic field distortions peripheral of said attenuator.

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