Multi-channel SERF atomic magnetometer device for brain magnetic measurement and application method

An atomic magnetometer and multi-channel technology, applied in the field of magnetic brain measurement, can solve the problems of complex design system, channel crosstalk, and high development cost, and achieve the effect of simple design structure, high common-mode rejection ratio, and elimination of common-mode magnetic field noise

Active Publication Date: 2020-04-21
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

The design system is complex, the development cost is high, and crosstalk is likely to occur between channels

Method used

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  • Multi-channel SERF atomic magnetometer device for brain magnetic measurement and application method
  • Multi-channel SERF atomic magnetometer device for brain magnetic measurement and application method

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Embodiment 1

[0051] Linear polarizer 2 was purchased from Wuhan Youguang Technology Co., Ltd., model: SHP9012-550-900.

[0052] 1 / 4 wave plate 3, purchased from Wuhan Youguang Technology Co., Ltd., model: WAPA4210-650-1100.

[0053] Diffractive optical element 4 was purchased from Xinte Optoelectronics, model: MS-204-I-Y-A.

[0054] Right-angle prism 5 was purchased from Wuhan Youguang Technology Co., Ltd., model: RAP0110.

[0055] The photodetector 10 was purchased from Hamamatsu Photonics Trading (China) Co., Ltd., model: S1133-14.

[0056] The invention can effectively design and process the diffractive optical element, can greatly reduce the number of probes of the atomic magnetometer, and reduce the production cost and operation complexity of the atomic magnetometer.

[0057] To achieve the measurement and imaging of the magnetic field of the entire brain region, 275 single-channel atomic magnetometer probes are required compared to the commercial 275-channel SQUID magnetoencephalog...

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Abstract

The invention provides a multi-channel SERF atomic magnetometer device for brain magnetic measurement and an application method. The multi-channel atomic magnetometer is designed by utilizing latticebeam splitting characteristics of a diffractive optical element, so that imaging and acquisition of a magnetoencephalogram are realized. Compared with a traditional SQUID magnetoencephalogram instrument, the multi-channel SERF atomic magnetometer device has higher sensitivity, higher signal-to-noise ratio and higher spatial resolution. Compared with an existing multi-channel SERF atomic magnetometer, the multi-channel SERF atomic magnetometer device is easier to integrate and miniaturize, and is not limited to array type photoelectric detectors and lower inter-channel signal crosstalk. The multi-channel SERF atomic magnetometer device is mainly applied to the field of magnetoencephalogram research, and has potential application prospects in the fields of material chemical component and structure analysis, mineral deposit detection, geomagnetic navigation, earthquake prediction and the like. Meanwhile, the multi-channel design of the multi-channel SERF atomic magnetometer device can further be used in other optical pump atomic magnetometers, and universality and innovativeness are achieved.

Description

technical field [0001] The invention relates to a multi-channel SERF atomic magnetometer device and method for magnetic brain measurement, belonging to the technical field of magnetic brain measurement. Background technique [0002] Commercially, magnetometers used for MEG measurements are mainly based on SQUIDs. In order to realize the imaging and measurement of signals in the whole brain region, commercial magnetoencephalographs generally have 275 channels. Since the SQUID magnetometer requires liquid helium non-metallic low-temperature Dewar to reduce the Johnson noise on the outer wall of the Dewar, and due to the interference of the compressor on the magnetic signal of the brain, a fully enclosed liquid helium system cannot be used, resulting in high equipment costs and difficult operation and maintenance. Large and costly. In addition, it is impossible to make a wearable magnetoencephalograph for the measurement of magnetic brain signals in the state of exercise. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032A61B5/055
CPCG01R33/032A61B5/055A61B5/0042A61B2576/026
Inventor 李建军王学锋邓意成张笑楠刘院省桑建芝卢向东李明阳徐强锋
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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