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DNV magnetic field detector

  • US 9,910,104 B2
  • Filed: 01/21/2016
  • Issued: 03/06/2018
  • Est. Priority Date: 01/23/2015
  • Status: Active Grant
First Claim
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1. A system for magnetic detection, comprising:

  • a magneto-optical defect center sensor comprising;

    a magneto-optical defect center material comprising a plurality of magneto-optical defect centers;

    a radio frequency (RF) excitation source configured to provide RF excitation to the magneto-optical defect center material;

    an optical excitation source configured to provide optical excitation to the magneto-optical defect center material;

    an optical detector configured to receive an optical signal emitted by the magneto-optical defect center material, wherein the optical signal is based on hyperfine states of the magneto-optical defect center material;

    a controller configured to detect a gradient of the optical signal based on the hyperfine states emitted by the magneto-optical defect center material; and

    a first magnetic field generator configured to generate a magnetic field, wherein the controller is further configured to;

    control the first magnetic field generator to apply a first time varying magnetic field at the magneto-optical defect center material,determine a magnitude and direction of the magnetic field at the magneto-optical defect center material based on a received light detection signal from the optical detector; and

    determine a magnetic vector anomaly due to an object based on the determined magnitude and direction of the magnetic field according to a frequency dependent attenuation of the time varying magnetic field.

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