Magnetic field measurement apparatus
AssigneeNEC Corporation
InventorKenta Matsumoto
Life of this patent
Estimating the term…
Abstract
A magnetic field measurement apparatus according to the present invention includes: a gas cell in which an alkali metal atom is encapsulated; a light generation device configured to generate light to be radiated to the gas cell while controlling a polarization state thereof; an optical frequency modulation device configured to modulate a frequency of the light generated by the light generation device; a light detection device configured to measure an intensity and a polarization state of light transmitted through the gas cell; and a control device configured to determine a magnetic field value at a predetermined position inside the gas cell based on each of the intensity of the light and the polarization state of the light measured by the light detection device.
Claims14
A magnetic field measurement apparatus comprising:
- a gas cell in which an alkali metal atom is encapsulated;
- a light generation device configured to generate light to be radiated to the gas cell while controlling a polarization state thereof;
- an optical frequency modulation device configured to modulate a frequency of the light generated by the light generation device;
- a light detection device configured to measure an intensity and a polarization state of light transmitted through the gas cell;
- and
- a control device configured to determine a magnetic field value at a predetermined position inside the gas cell based on the intensity of the light measured by the light detection device and after that determine a magnetic field value based on a polarization state of the light in accordance with the determined magnetic field value based on the intensity of the light.
A magnetic field measurement method by a magnetic field measurement apparatus that includes a gas cell in which an alkali metal atom is encapsulated, a light generation device configured to generate light to be radiated to the gas cell while controlling a polarization state thereof, an optical frequency modulation device configured to modulate a frequency of the light generated by the light generation device, and a light detection device configured to measure an intensity and a polarization state of light transmitted through the gas cell, the magnetic field measurement method comprising:
- determining a magnetic field value at a predetermined position inside the gas cell based on the intensity of the light measured by the light detection device and after that determining a magnetic field value based on the polarization state of the light.
Dependencies are inferred from the claim text.