Patents by Inventor Koji TAKEMIYA

Koji TAKEMIYA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optically pumped magnetometer and magnetic sensing method that expand a measurable frequency band of magnetism
    Patent number: 11391796
    Abstract: A optically pumped magnetometer includes a cell filled with an alkali metal; a pump light source that generates a pump light; a probe light source that generates a probe light; a signal output unit that obtains an output signal related to magnetism, which is received by the cell, based on the probe light which has passed through the cell; a coil unit that generates a static magnetic field along a pump optical axis in a region of disposition of the cell; and a computer that controls operation of the coil unit. The computer outputs a first control signal to set an intensity of the static magnetic field to a first intensity, and a second control signal to set the intensity of the static magnetic field to a second intensity different from the first intensity.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: July 19, 2022
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Masaki Yamada, Koji Takemiya
  • OPTICALLY PUMPED MAGNETOMETER AND MAGNETIC SENSING METHOD
    Publication number: 20210278486
    Abstract: A optically pumped magnetometer includes a cell filled with an alkali metal; a pump light source that generates a pump light; a probe light source that generates a probe light; a signal output unit that obtains an output signal related to magnetism, which is received by the cell, based on the probe light which has passed through the cell; a coil unit that generates a static magnetic field along a pump optical axis in a region of disposition of the cell; and a computer that controls operation of the coil unit. The computer outputs a first control signal to set an intensity of the static magnetic field to a first intensity, and a second control signal to set the intensity of the static magnetic field to a second intensity different from the first intensity.
    Type: Application
    Filed: March 2, 2021
    Publication date: September 9, 2021
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Masaki YAMADA, Koji TAKEMIYA