A magnetometer includes an electron spin defect body including a plurality of lattice point defects. A microwave field transmitter is operable to apply a microwave field to the electron spin defect body. An optical source is configured to emit input light of a first wavelength that excites the plurality of lattice point defects of the electron spin defect body from a ground state to an excited state. A first optical fiber has an input end optically coupled to the optical source and an output end. The output end is attached to a first face of the electron spin defect body and is arranged to direct the input light into the first face of the electron spin defect body. A second optical fiber has an output end and an input end. A photodetector is optically coupled to the output end of the second optical fiber.

A magnetometer includes an electron spin defect body including a plurality of lattice point defects. A microwave field transmitter is operable to apply a microwave field to the electron spin defect body. An optical source is configured to emit input light of a first wavelength that excites the plurality of lattice point defects of the electron spin defect body from a ground state to an excited state. A first optical fiber has an input end optically coupled to the optical source and an output end. The output end is attached to a first face of the electron spin defect body and is arranged to direct the input light into the first face of the electron spin defect body. A second optical fiber has an output end and an input end. A photodetector is optically coupled to the output end of the second optical fiber.

The present invention disclose an information processing method and a mobile device. The mobile device includes a device body and a magnetic adjustment mechanism, where the magnetic adjustment mechanism includes a magnetic adjustment member and a magnetic sensor, and the magnetic adjustment member is adjusted to enable the magnetic sensor to generate a pulse signal; and the device body further includes a processor and a display screen, and the processor receives the pulse signal generated by the magnetic adjustment mechanism, processes the pulse signal, and then displays adjusted content by using the display screen. This avoids a problem that adjustment cannot be conveniently performed because a display screen is covered by a finger when an operation is performed directly on the display screen.

The present invention disclose an information processing method and a mobile device. The mobile device includes a device body and a magnetic adjustment mechanism, where the magnetic adjustment mechanism includes a magnetic adjustment member and a magnetic sensor, and the magnetic adjustment member is adjusted to enable the magnetic sensor to generate a pulse signal; and the device body further includes a processor and a display screen, and the processor receives the pulse signal generated by the magnetic adjustment mechanism, processes the pulse signal, and then displays adjusted content by using the display screen. This avoids a problem that adjustment cannot be conveniently performed because a display screen is covered by a finger when an operation is performed directly on the display screen.

An active shield magnetometry system comprises at least one magnetic field actuator configured for generating an actuated magnetic field that at least partially cancels an outside magnetic field, thereby yielding a total residual magnetic field. The active shield magnetometry system further comprises a plurality of magnetometers respectively configured for measuring the total residual magnetic field and outputting a plurality of total residual magnetic field measurements. The active shield magnetometry system further comprises at least one feedback control loop comprising at least one optimal linear controller configured for controlling the actuated magnetic field at least partially based on at least one of the plurality of total residual magnetic field measurements respectively output by at least one of the plurality of magnetometers.

Provided is a cell for optically-pumped atomic magnetic gradiometry that includes a first confining chamber containing alkali atoms and configured to receive a co-propagating pump and probe light beam, including pump light polarized to spin polarize the alkali atoms, and at least a second confining chamber containing alkali atoms, distanced from the first confining chamber, and which is also configured to receive a co-propagating pump and probe light beam. Also provided are an optically-pumped atomic magnetic gradiometer including the presently disclosed and a system that includes the presently disclosed gradiometer and a microscopy system.

A magnetization measurement device includes: a current supply part supplying a periodically changing current to a sample made of a soft magnetic material with uniaxial magnetic anisotropy in a first direction and a bias magnetic field applied in a second direction crossing the first direction; a light irradiation part irradiating a surface of the sample with linearly polarized pulse light having a predetermined delay time with respect to the current and having a predetermined polarized surface; and a measurement part measuring magnetization of the sample at the delay time based on reflected light of the pulse light reflected by the surface of the sample. These enable the measurement of the change in the magnetization of the sample over time, which corresponds to supply of the periodically changing current.

A headgear for magnetoencephalography includes a body defining a plurality of ports, where the body includes a first portion and a second portion; an adjustment mechanism coupled to the first portion and the second portion of the body and configured to adjust a separation between the first and second portion to facilitate fitting the headgear to a head of a user; and a plurality of optically pumped magnetometer (OPM) modules, where each of the OPM modules includes at least one vapor cell and is configured to be removably inserted into a one of the ports of the body, where each of the OPM modules is configured for coupling to a light source for receiving light.

A headgear for magnetoencephalography includes a body defining a plurality of ports, where the body includes a first portion and a second portion; an adjustment mechanism coupled to the first portion and the second portion of the body and configured to adjust a separation between the first and second portion to facilitate fitting the headgear to a head of a user; and a plurality of optically pumped magnetometer (OPM) modules, where each of the OPM modules includes at least one vapor cell and is configured to be removably inserted into a one of the ports of the body, where each of the OPM modules is configured for coupling to a light source for receiving light.

An ODMR member is arranged in a measurement target AC magnetic field. A coil applies a magnetic field of a microwave to the ODMR member. A high frequency power supply causes the coil to conduct a current of the microwave. An irradiating device irradiates the ODMR member with light. A light receiving device detects light that the ODMR member emits. A measurement control unit performs a predetermined DC magnetic field measurement sequence at a predetermined phase of the measurement target AC magnetic field, and in the DC magnetic field measurement sequence, controls the high frequency power supply and the irradiating device and thereby determines a detection light intensity of the light detected by the light receiving device. A magnetic field calculation unit calculates an intensity of the measurement target AC magnetic field on the basis of the predetermined phase and the detection light intensity.