公开(公告)号：US20240385265A1

公开(公告)日：2024-11-21

申请号：US18696064

申请日：2022-07-06

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Norihisa KATO ,  Masaki YAMADA ,  Fusanori KONDO

IPC: G01R33/26

Abstract: An optically pumped magnetometer module includes a housing and a cell unit disposed in the housing. The cell unit has a cell enclosing an alkali metal, a heat conductive member covering the cell, and a heater provided to the heat conductive member. The cell includes a main body portion having a light-passing region through which at least one of pump light and probe light passes. The heat conductive member is continuously provided over an entire region of an outer surface of the main body portion excluding the light-passing region.

公开(公告)号：US20230160630A1

公开(公告)日：2023-05-25

申请号：US17985280

申请日：2022-11-11

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tsuyoshi KODAMA ,  Masaki YAMADA

IPC: F25D31/00 ,  F25D19/00 ,  H05B3/00

CPC classification number: F25D31/005 ,  F25D19/006 ,  H05B3/0071

Abstract: A refrigeration system includes: a vacuum chamber forming a cooling region accommodating an object; a cooling unit that cools the object accommodated in the cooling region; and a heating unit disposed in the cooling region to generate heat. The heating unit includes an optical fiber that guides light provided from an outside of the vacuum chamber, and a heating block that is disposed in the cooling region and that receives the light emitted from the optical fiber, to generate heat. The heating block includes a closed region configured to be isolated from the cooling region. A light-emitting end of the optical fiber is exposed to the closed region.

公开(公告)号：US20210278486A1

公开(公告)日：2021-09-09

申请号：US17189530

申请日：2021-03-02

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Masaki YAMADA ,  Koji TAKEMIYA

IPC: G01R33/26

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.

公开(公告)号：US20250164586A1

公开(公告)日：2025-05-22

申请号：US18839519

申请日：2022-10-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Norihisa KATO ,  Masaki YAMADA ,  Koji TAKEMIYA ,  Masato KITABAYASHI

IPC: G01R33/26 ,  G01R35/00

Abstract: A magnetometer module includes a cell, a pump laser light source, a photodiode configured to detect an intensity of pump light, a probe laser light source, a photodiode element configured to detect an intensity of probe light, a differential amplifier configured to generate a magnetism detection signal based on the probe light that has passed through the cell, and a control circuit configured to perform at least one of first determination processing of determining a driving condition of the light source based on the intensity of the pump light detected by the photodiode while controlling the light source and performing wavelength sweep on the pump light and second determination processing of determining a driving condition of the light source based on the intensity of the probe light detected by the photodiode element while controlling the light source and performing wavelength sweep on the probe light.

公开(公告)号：US20230369035A1

公开(公告)日：2023-11-16

申请号：US18026364

申请日：2021-09-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tsuyoshi KODAMA ,  Masaki YAMADA

IPC: H01J40/06 ,  H01J40/10

CPC classification number: H01J40/06 ,  H01J40/10

Abstract: A photoelectric tube includes a housing including a light transmitting portion, an electron emitting portion including a photoelectric surface disposed inside the housing, an electron capturing portion disposed between the light transmitting portion and the photoelectric surface inside the housing, and a conductive layer disposed on a light transmitting portion side of at least a part of the electron capturing portion to face the photoelectric surface inside the housing and configured to allow light to pass therethrough.

公开(公告)号：US20230352285A1

公开(公告)日：2023-11-02

申请号：US18026368

申请日：2021-09-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tsuyoshi KODAMA ,  Masaki YAMADA ,  Shinichi HARA ,  Naoki UMEBAYASHI

IPC: H01J47/02

CPC classification number: H01J47/02

Abstract: A photoelectric tube includes a housing including a light transmitting portion, an electron emitting portion held by a recess provided in the housing, the electron emitting portion including a concave photoelectric surface facing a light transmitting portion side inside the housing, and an electron capturing portion disposed between the light transmitting portion and the photoelectric surface inside the housing. At least a part of the electron capturing portion is located inside a region on an inside of the photoelectric surface.