Anti-distortion electromagnetic sensor method and system
First Claim
Patent Images
1. A source for inducing an electromagnetic magnetic field, comprising:
- a substrate;
a conductive layer coupled to the substrate;
a planar coil coupled to the substrate, wherein the planar coil comprises non-concentric rings, wherein the non-concentric rings are configured such that a drive current applied across the non-concentric rings provides a magnetic field, and wherein the magnetic field comprises a moment vector that is tilted at an angle from the normal to a plane of the planar coil; and
a generally dipole wound coil, wherein the generally dipole wound coil is configured to modify the angle of the moment vector.
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Abstract
A source for inducing an electromagnetic magnetic field, comprising: a substrate, a conductive layer coupled to the substrate, and a planar coil coupled to the substrate, wherein the planar coil comprises non-concentric rings, and wherein the non-concentric rings are configured such that a drive current applied across the non-concentric rings provides a magnetic field, and wherein the magnetic field comprises a moment vector that is tilted at an angle from the normal to a plane of the planar coil. Also provided are a method of electromagnetic tracking, a method of manufacture of a planar coil, and an electromagnetic sensor.
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Citations
26 Claims
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1. A source for inducing an electromagnetic magnetic field, comprising:
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a substrate; a conductive layer coupled to the substrate; a planar coil coupled to the substrate, wherein the planar coil comprises non-concentric rings, wherein the non-concentric rings are configured such that a drive current applied across the non-concentric rings provides a magnetic field, and wherein the magnetic field comprises a moment vector that is tilted at an angle from the normal to a plane of the planar coil; and a generally dipole wound coil, wherein the generally dipole wound coil is configured to modify the angle of the moment vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of electromagnetic tracking, comprising:
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inducing a drive current into a planar coil located on one side of an electrically conductive layer, wherein the planar coil comprises non-concentric rings, and wherein the non-concentric rings are configured such that inducing the drive current across the planar coil provides a magnetic field, wherein the magnetic field comprises a moment vector that is tilted at an angle from the normal to a plane of the planar coil; and energizing a generally dipole wound coil, wherein energizing the generally dipole wound coil modifies the angle of the moment vector of the magnetic field. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An electromagnetic sensor, comprising:
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an insulating layer having a first surface and a second surface, the second surface being opposite the first surface; a conductive layer coupled to the second surface of the insulating layer; and a planar coil coupled to the first surface of the insulating layer, wherein the planar coil comprises non-concentric rings, wherein the non-concentric rings are configured such that a drive current applied across the non-concentric rings provides a magnetic field, and wherein the magnetic field comprises a moment vector that is tilted at an angle from the normal to a plane of the planar coil; and a generally dipole wound coil coupled to the planar coil, wherein the generally dipole wound coil is configured to modify the angle of the moment vector. - View Dependent Claims (21)
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22. A method of manufacture of a planar coil assembly, comprising:
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coupling a planar coil to an electrically conductive layer, wherein the planar coil comprises non-concentric rings, and wherein the non-concentric rings are configured such that a inducing drive current across the planar coil provides a magnetic field, wherein the magnetic field comprises a moment vector that is tilted at an angle from the normal of a plane of the planar coil; and coupling a generally dipole wound coil to the planar coil, wherein the generally dipole wound coil is configured to modify the angle of the moment vector. - View Dependent Claims (23, 24, 25, 26)
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Specification