公开(公告)号：US20230061021A1

公开(公告)日：2023-03-02

申请号：US17891467

申请日：2022-08-19

Applicant: HAMAMATSU PHOTONICS K.K. ,  Kyoto University

Inventor： Takenori OIDA ,  Takahiro MORIYA ,  Akinori SAITO ,  Motohiro SUYAMA ,  Tetsuo KOBAYASHI

IPC: G01R33/3415 ,  G01R33/385 ,  A61B5/055

Abstract: Provided is a brain measurement system including: a geomagnetic correction coil; a geomagnetic gradient correction coil; a transmission coil; a receiving coil; a plurality of resonance adjustment circuits; a plurality of OPM modules provided corresponding to each of the plurality of resonance adjustment circuits for detecting a signal having a resonance frequency output from the resonance adjustment circuit; and a control device for generating an MR image based on the signal detected by the OPM module, wherein, when a direction parallel to a central axis of a head portion of a subject is defined as a Z-axis direction, the resonance frequency related to each of the plurality of resonance adjustment circuits is set according to a magnetic field gradient in the Z-axis direction generated by control of a position of the corresponding receiving coil in the Z-axis direction and a tilted magnetic field.

公开(公告)号：US20210389397A1

公开(公告)日：2021-12-16

申请号：US17346551

申请日：2021-06-14

Applicant: HAMAMATSU PHOTONICS K.K. ,  Kyoto University

Inventor： Akinori SAITO ,  Takahiro MORIYA ,  Takenori OIDA ,  Motohiro SUYAMA ,  Tetsuo KOBAYASHI

IPC: G01R33/26

Abstract: A magnetoencephalograph M1 includes: multiple pump-probe type optically pumped magnetometers 1A; a bias magnetic field forming coil 15 for applying a bias magnetic field in the same direction as a direction of pump light of each of the multiple pump-probe type optically pumped magnetometers 1A and in a direction approximately parallel to a scalp; a control device 5 that determines a current for the bias magnetic field forming coil and outputs a control signal corresponding to the determined current; and a coil power supply 6 that outputs a current to the bias magnetic field forming coil in response to the control signal output from the control device.

公开(公告)号：US20210386347A1

公开(公告)日：2021-12-16

申请号：US17346338

申请日：2021-06-14

Applicant: HAMAMATSU PHOTONICS K.K. ,  Kyoto University

Inventor： Takahiro MORIYA ,  Takenori OIDA ,  Akinori SAITO ,  Motohiro SUYAMA ,  Tetsuo KOBAYASHI

IPC: A61B5/245 ,  G01R33/26 ,  G01R33/421 ,  G01R33/54 ,  G01R33/34 ,  G01R33/00 ,  A61B5/055 ,  A61B5/00

Abstract: A brain measurement apparatus includes: a magnetoencephalograph including optically pumped magnetometers, magnetic sensors for measuring geomagnetic field at positions of the optically pumped magnetometers, magnetic sensors for measuring a fluctuating magnetic field at the positions of the optically pumped magnetometers, nulling coils for cancelling the geomagnetic field, and an active shield coil for cancelling the fluctuating magnetic field; an MRI apparatus including nulling coils for applying a static magnetic field and a gradient magnetic field, a transmission coil, and a receive coil; and a control device that, when measuring a brain's magnetic field, controls currents supplied to the nulling coils and the active shield coil based on measured values of the magnetic sensors and, when measuring an MR image, controls the static magnetic field and the gradient magnetic field by controlling currents supplied to the nulling coils and generates an MR image from an output of the receive coil.

公开(公告)号：US20210386346A1

公开(公告)日：2021-12-16

申请号：US17346331

申请日：2021-06-14

Applicant: HAMAMATSU PHOTONICS K.K. ,  Kyoto University

Inventor： Takahiro MORIYA ,  Takenori OIDA ,  Akinori SAITO ,  Motohiro SUYAMA ,  Tetsuo KOBAYASHI

IPC: A61B5/245 ,  G01R33/00 ,  G01R33/26 ,  A61B5/00

Abstract: A magnetoencephalograph M1 includes: multiple optically pumped magnetometers 1A that measure a brain's magnetic field; multiple magnetic sensors for geomagnetic field cancellation 2 that measure a magnetic field; multiple magnetic sensors for active shield 3 that measure a fluctuating magnetic field; a geomagnetic field nulling coil; an active shield coil 9; a control device 5 that determines a current to generate a magnetic field for canceling the magnetic field based on measured values of the multiple magnetic sensors for geomagnetic field cancellation 2, determines a current to generate a magnetic field for canceling the fluctuating magnetic field based on measured values of the multiple magnetic sensors for active shield 3, and outputs a control signal corresponding to each of the determined currents; and a coil power supply 6 that outputs a current to each coil in response to the control signal.

公开(公告)号：US20200093448A1

公开(公告)日：2020-03-26

申请号：US16543728

申请日：2019-08-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Motohiro SUYAMA ,  Hideki SHIMOI ,  Ryosuke OTA ,  Ryoko YAMADA

IPC: A61B6/00 ,  G01T1/24 ,  A61B6/03

Abstract: A high-energy ray detector includes a detection unit in a vacuum container. The detection unit includes a first electron multiplier, a second electron multiplier, and an electron collector. Each of the first electron multiplier and the second electron multiplier has one or more MCPs each configured to emit electrons by interaction with an incident high-energy ray (γ-ray, X-ray (in particular hard X-ray), or neutron ray), and multiply and output the electrons. The electron collector is transmissive for the high-energy ray. The electron collector is configured to collect the electrons multiplied and output from each of the first electron multiplier and the second electron multiplier, and output an electric pulse signal.

公开(公告)号：US20190123254A1

公开(公告)日：2019-04-25

申请号：US16162656

申请日：2018-10-17

Applicant: KEIO UNIVERSITY ,  HAMAMATSU PHOTONICS K.K.

Inventor： Hideyuki MAKI ,  Motohiro SUYAMA ,  Takaaki NAGATA ,  Takeo FUJII

IPC: H01L33/64 ,  H01L33/36 ,  H01L33/00

CPC classification number: H01L33/641 ,  H01L33/0054 ,  H01L33/36 ,  H01L33/40 ,  H01L2933/0016 ,  H01L2933/0075

Abstract: A light-emitting device according to one embodiment includes: a substrate; a graphite thin film disposed on the substrate; and an electrode provided on a second surface of the graphite thin film on an edge portion of the graphite thin film, the second surface of the graphite thin film being opposite from a first surface of the graphite thin film, the first surface of the graphite thin film opposed to the substrate. A plurality of protrusions for supporting the graphite thin film is formed on a surface of the substrate opposed to the graphite thin film, at least over an entire region where the substrate and a portion of the graphite thin film other than the edge portion overlap each other when viewed along a thickness direction of the substrate.

公开(公告)号：US20180174810A1

公开(公告)日：2018-06-21

申请号：US15740164

申请日：2016-06-30

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Motohiro SUYAMA ,  Hiroshi KOBAYASHI ,  Shinya HATTORI

IPC: H01J49/02 ,  G01T1/24 ,  H01J49/06

CPC classification number: H01J49/025 ,  G01T1/241 ,  G01T1/28 ,  H01J43/24 ,  H01J49/06 ,  H01J49/067

Abstract: A charged particle detector according to the embodiment is provided with an MCP and a PD arranged with a focus electrode interposed therebetween in order to improve a response characteristic as compared to a conventional one in a configuration in which the MCP having a bias angle and the PD are combined. The MCP includes a plurality of through holes each inclined by a bias angle θ and the PD is eccentrically arranged such that a center of an electron incident surface deviates by a predetermined distance in a bias angle direction S3 with respect to a central axis AX1 of the MCP.

公开(公告)号：US20250076423A1

公开(公告)日：2025-03-06

申请号：US18773654

申请日：2024-07-16

Applicant: Hamamatsu Photonics K.K. ,  Kyoto University

Inventor： Takahiro MORIYA ,  Takenori OIDA ,  Akinori SAITO ,  Motohiro SUYAMA ,  Yosuke ITO ,  Hiroyuki UEDA

IPC: G01R33/26 ,  G01R33/00 ,  G01R33/032

Abstract: An optically pumped magnetometer includes a cell, a pump light incidence unit causing pump light to be incident on a sensitivity region inside the cell in a first direction, a probe light incidence unit causing probe light for detecting change in electron spins to be incident on the sensitivity region in a direction intersecting the first direction, a bias magnetic field coil applying a bias magnetic field in the first direction to the inside of the cell and determining a resonance frequency of the electron spins, a gradient correction coil correcting a gradient of the bias magnetic field, an electron spin tilting unit tilting a rotation axis direction of the electron spins, an optical sensor detecting the probe light having passed through the sensitivity region, and a magnetic field measuring unit measuring a magnetic field strength related to the sensitivity region based on an output of the optical sensor.

公开(公告)号：US20220390533A1

公开(公告)日：2022-12-08

申请号：US17829413

申请日：2022-06-01

Applicant: HAMAMATSU PHOTONICS K.K. ,  Kyoto University

Inventor： Akinori SAITO ,  Takahiro MORIYA ,  Takenori OIDA ,  Motohiro SUYAMA ,  Tetsuo KOBAYASHI

IPC: G01R33/26

Abstract: An optically pumped magnetometer includes cells configured to form a first cell region and a second cell region on a measurement target, a pump laser, a probe laser, a first optical system configured to cause pump light to be incident on the first cell region, a second optical system configured to cause the pump light having passed through the first cell region to be incident on the second cell region, a third optical system configured to cause first probe light to be incident on the first cell region, a fourth optical system configured to cause second probe light to be incident on the second cell region, detection portions configured to detect the first probe light having passed through the first cell region and the second probe light having passed through the second cell region, and a deriving portion configured to derive an intensity of a magnetic field.

公开(公告)号：US20210389396A1

公开(公告)日：2021-12-16

申请号：US17346322

申请日：2021-06-14

Applicant: HAMAMATSU PHOTONICS K.K. ,  Kyoto University

Inventor： Akinori SAITO ,  Takahiro MORIYA ,  Takenori OIDA ,  Motohiro SUYAMA ,  Tetsuo KOBAYASHI

IPC: G01R33/26

Abstract: An optically pumped magnetometer 1 includes: a cell 2; a pump laser 7 that emits pump light; one or more pump light mirrors that cause the pump light guided in a first direction; a probe laser 8 that emits probe light; a splitting unit 12 that splits the probe light into multiple light components; one or more probe light mirrors that cause each of the probe light components guided in a second direction, which is a direction perpendicular to the first direction; a detection unit that detects each of the probe light components perpendicular to the pump light inside the cell 2; and a derivation unit that derives a magnetic field corresponding to a region where each of the probe light components and the pump light are perpendicular to each other based on a detection result of the detection unit.