×

MAGNETIC FIELD MEASUREMENT METHOD AND MAGNETIC FIELD MEASUREMENT DEVICE

  • US 20160131723A1
  • Filed: 10/30/2015
  • Published: 05/12/2016
  • Est. Priority Date: 11/12/2014
  • Status: Active Grant
First Claim
Patent Images

1. A magnetic field measurement method of measuring a magnetic field of a measurement region in a magnetic field measurement device, the magnetic field measurement device including (i) a light source unit that emits linearly polarized light in which a first direction, a second direction and a third direction are orthogonal to each other, (ii) a medium, disposed in the measurement region, which changes optical characteristics of the linearly polarized light in accordance with a magnetic field, and that is irradiated along the third direction with the linearly polarized light of which a vibration direction of an electric field is the second direction, (iii) an optical detector that detects the optical characteristics, and (iv) a magnetic field generator that applies an artificial magnetic field to the measurement region, the method comprising:

  • generating a plurality of artificial magnetic fields, obtained by changing an artificial magnetic field component in the third direction, in the magnetic field generator;

    calculating a magnetization value that is a component of a magnetization vector of the medium in the first direction or a value corresponding to the magnetization value based on detection results of the optical detector; and

    calculating an original magnetic field present in the measurement region, using an artificial magnetic field of the plurality of artificial magnetic fields when the magnetization value or the value corresponding to the magnetization value satisfies a specified condition.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×