Patent ID: 9500722
Filing Date: 2016-11-22
CPC Classification: G01R

Claim Text:
1. A magnetic field measurement apparatus comprising: a first medium formed of a plurality of first media, the first medium allowing light from a first light source to pass therethrough and rotates a first polarization plane of linearly polarized light in accordance with an intensity of a magnetic field; a second medium that allows light from a second light source to pass therethrough and rotates a second polarization plane of linearly polarized light in accordance with the intensity of the magnetic field; a first detection section that detects the first polarization plane of linearly polarized light that has passed through the first medium; a second detection section that detects the second polarization plane of linearly polarized light that has passed through the second medium; a third detection section that detects a third polarization plane of linearly polarized light that has originated from the first light source but has not passed through the first medium; a fourth detection section that detects a fourth polarization plane of linearly polarized light that has originated from the second light source but has not passed through the second medium; and a measurement section that wherein a number of third detection sections is smaller than a number of first media.