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A multi-channel serf atomic magnetometer device and application method for magnetic brain measurement

An atomic magnetometer, multi-channel technology, applied in the field of magnetoencephalography, can solve the problems of high development cost, complex design system, channel crosstalk, etc., achieve simple design structure, eliminate common mode magnetic field noise, and high common mode rejection ratio. Effect

Active Publication Date: 2022-05-24
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
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  • Claims
  • Application Information

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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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  • A multi-channel serf atomic magnetometer device and application method for magnetic brain measurement
  • A multi-channel serf atomic magnetometer device and application method for magnetic brain measurement

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Embodiment 1

[0051] Linear polarizer 2, 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, purchased from Xinte Optoelectronics, model: MS-204-I-Y-A.

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

[0055] Photodetector 10, 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 manufacturing 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 magnetoencephalography. The d...

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Abstract

The invention proposes a multi-channel SERF atomic magnetometer device and an application method for magnetic brain measurement. A multi-channel atomic magnetometer is designed by utilizing the lattice beam-splitting characteristics of diffractive optical elements to realize the imaging and acquisition of magnetoencephalogram. Compared with the traditional SQUID magnetoencephalograph, it has higher sensitivity, better signal-to-noise ratio and higher spatial resolution. Compared with the existing multi-channel SERF atomic magnetometer, it is easier to integrate miniaturization, not limited to array photodetectors, and lower signal crosstalk between channels. The invention is mainly used in the field of magnetoencephalography research, and has potential application prospects in the fields of material chemical composition and structure analysis, mineral deposit detection, geomagnetic navigation, earthquake prediction and the like. At the same time, the multi-channel design of the present invention can also be used in other optically pumped atomic magnetometers, which is universal and innovative.

Description

technical field [0001] The invention relates to a multi-channel SERF atomic magnetometer device and a method for magnetoencephalography, belonging to the technical field of magnetoencephalography. Background technique [0002] Commercially, magnetoencephalography measurements are mainly based on SQUID magnetometers. Commercial magnetoencephalographs typically have 275 channels for imaging and measurement of signals throughout the brain. Since the SQUID magnetometer requires a 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 brain magnetic signal, the fully enclosed liquid helium system cannot be used, resulting in high equipment cost and difficulty in operation and maintenance. large and expensive. In addition, a wearable magnetoencephalograph for the measurement of magnetic brain signals during exercise cannot be made. [0003] With the development of quantum ...

Claims

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Application Information

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Patent Type & Authority Patents(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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