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A multi-channel atomic magnetic field measurement device

A magnetic field measurement, multi-channel technology, applied in the magnetic field measurement, magnetic field size/direction and other directions using magneto-optical equipment, can solve the problems of many variables, high cost, complex system structure, etc., to simplify the structure and maintain the common mode Consistency, improve the effect of anti-interference ability

Active Publication Date: 2022-03-25
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing multi-channel atomic magnetic field measurement devices are generally realized by beam splitting in the optical path, which requires the use of a large number of beam splitting and correcting optical components, introduces many uncontrollable variables, complex system structure and high cost

Method used

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  • A multi-channel atomic magnetic field measurement device
  • A multi-channel atomic magnetic field measurement device

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Embodiment

[0028] Reference attached figure 1 , the multi-channel atomic magnetic field measurement device proposed by the present invention includes a laser controller 101, a laser 102, a beam splitter 103, a first mirror 104, a second mirror 105, a first half-wave plate 106, a vortex Wave plate 107, beam expander 108, first quarter wave plate 109, second half wave plate 110, polarizing beam splitter 111, first focusing lens 112, first analyzer 113, first balance Detector 114, second quarter-wave plate 115, second focusing lens 116, second analyzer 117, second balance detector 118, first atomic gas cell module 201, second atomic gas cell module 202, The third atomic gas chamber module 203, the fourth atomic gas chamber module 204, the first temperature magnetic field control module 301, the second temperature magnetic field control module 302, the third temperature magnetic field control module 303, the fourth temperature magnetic field control module 304, signal processing Module 401....

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Abstract

The invention discloses a multi-channel atomic magnetic field measuring device based on a vortex wave plate, which mainly utilizes the radially linearly polarized light generated after the linearly polarized light beam passes through the vortex wave plate to measure a pair of atomic gas chambers symmetrically distributed along the beam diameter. Space-separated spin polarization and detection, the structure of the multi-channel atomic magnetic field measurement device of the present invention is simplified; the dual-channel atomic magnetic gradient measurement is realized without adding laser light sources and detectors, and the common mode of the two channels is kept consistent It can effectively improve the anti-interference ability of magnetic field measurement and the sensitivity of magnetic anomaly measurement.

Description

technical field [0001] The invention belongs to a magnetic field measuring device, in particular to a multi-channel atomic magnetic field measuring device. Background technique [0002] The moving charges will generate a magnetic field, and in the human body, along with life activities, weak magnetic fields will also be generated in some tissues and organs. Ferromagnetic substances will cause abnormal changes in the nearby geomagnetic field, and the abnormal magnetic changes are related to the shape and material composition of ferromagnetic objects. Since the propagation of the magnetic field is less affected by the medium, the magnetic field measurement is widely used in medical diagnosis, mineral exploration, geomagnetic navigation, target detection and other fields. [0003] The spin of alkali metal atoms (such as potassium, rubidium, and cesium) will produce a magnetic resonance effect in a magnetic field. The resonance frequency is proportional to the amplitude of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 李莹颖张锐徐馥芳马明祥谢玉波汪杰罗玉昆
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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