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CN-121978021-A - Multifunctional magneto-optical test system and method

CN121978021ACN 121978021 ACN121978021 ACN 121978021ACN-121978021-A

Abstract

The invention provides a multifunctional magneto-optical spectrum testing system and method, wherein the spectrum system is divided into an absorption spectrum and a luminescence spectrum, the spectrum system can be divided into different polarized (or non-polarized) spectrums for absorption (or luminescence) by adjusting the polarization (or non-polarization) and the polarized form (circular polarization or linear polarization) of a light path, and meanwhile, an electromagnet is introduced into the light path, so that the testing requirement is met by regulating the size and the direction of a magnetic field. The system and the method can provide a wider adjustment range of the test parameters, each element in the system can be flexibly adjusted, the system is convenient to use and easy to realize, can improve the accuracy of test data while providing high-efficiency test, and are suitable for scientific research and industrial application in fields of various physics, chemistry, materials, chemical industry and the like.

Inventors

  • LI YI
  • SUN YIN
  • LUO QING
  • DONG ZHOU
  • SUN RUIXI

Assignees

  • 合肥工业大学

Dates

Publication Date
20260505
Application Date
20260108

Claims (8)

  1. 1. The multifunctional magneto-optical spectrum testing system is characterized by comprising a light source module, an electromagnet (10), a sample stage, a signal testing end and a spectrum analysis end (27); The sample stage is positioned on a transmission light path of the light source module, the light source module is used for outputting polarized light or unpolarized light, the sample is irradiated to generate an absorption or luminescence effect, and an effect signal is input to the signal testing end; The signal testing end is arranged on the optical path of the sample, and converts the absorption or luminous signals of the sample into corresponding spectrum signals by adjusting the polarization state or the non-polarization state of the optical path; The spectrum analysis end (27) is connected with the signal test end and is used for acquiring and analyzing the absorption spectrum or the luminescence spectrum of the sample; the electromagnets (10) are arranged on two sides of the sample table and are of hollow structures and used for adjusting the size and the direction of the magnetic field.
  2. 2. The system of claim 1, wherein the light source module comprises one of two configurations: a light source (1), an optical fiber coupler (2), an optical fiber collimator (3), a first polaroid (4) and a lens component which are sequentially arranged are configured; a second configuration comprises a light source (1), an optical fiber coupler (2), an optical fiber collimator (3), a first polaroid (4), a first 1/2 wave plate (5), a first 1/4 wave plate (6) and a lens component which are sequentially arranged; The optical fiber coupler (2) receives and transmits light source light, the optical fiber collimator (3) collimates the light source, the first polaroid (4) outputs linearly polarized light, and the first 1/2 wave plate (5) and the first 1/4 wave plate (6) output polarized light or unpolarized light required by the test by adjusting torsion angles.
  3. 3. The multifunctional magneto-optical spectrum testing system according to claim 2, wherein the lens assembly comprises a first lens (7), a first diaphragm (8) and a second lens (9) which are sequentially arranged, wherein the first lens (7) receives a light source and inputs the light source to the first diaphragm (8) after focusing, the first diaphragm (8) is used for limiting the cross-sectional size of the light beam, and the second lens (9) outputs the light source passing through the diaphragm to a sample stage after refocusing.
  4. 4. The multifunctional magneto-optical spectrum testing system according to claim 1, wherein the sample stage comprises a fixing frame (17) and a sample groove (18), wherein the fixing frame (17) and the sample groove (18) are both positioned in a hollow structure of the electromagnet (10), and the sample groove (18) is a customized plastic groove for placing a magnetic or non-magnetic, chiral or non-chiral absorption or luminescent material sample.
  5. 5. The system of claim 1, wherein the signal testing terminal comprises one of the following combinations of components: The combination comprises a first optical filter (11), a second diaphragm (12), a third lens (13), a second 1/4 wave plate (14), a second 1/2 wave plate (15) and a second polaroid (16); The second combination is composed of a second filter (19), a third diaphragm (20), a fourth lens (21), a third 1/4 wave plate (22), a third 1/2 wave plate (23) and a third polaroid (24); the optical filter is used for filtering a light source with a specific wave band, the diaphragm is used for controlling the size of a light beam, the lens is used for focusing the light source, the wave plate is used for converting input light into linearly polarized light through a torsion angle, the polaroid is used for outputting a spectrum signal, and the spectrum signal is transmitted to the spectrometer (26) through the optical fiber (25).
  6. 6. The system of claim 1, wherein the light source transmission direction of the light source module forms a predetermined angle with the signal input direction of the signal testing terminal, and the predetermined angle is a non-flat angle.
  7. 7. The multifunctional magneto-optical spectrum testing system according to claim 1, wherein the spectrum analysis end (27) is an intelligent device with a data processing function, and is capable of outputting a fluorescence spectrum, a magnetic/non-magnetic circular polarized luminescence spectrum, a magnetic/non-magnetic circular dichroism spectrum or a magnetic chiral dichroism spectrum.
  8. 8. A multifunctional magneto-optical spectrum testing method, characterized by being applied to the multifunctional magneto-optical spectrum testing system as claimed in any one of claims 1-7, comprising the following steps: s1, selecting the configuration and the light source type of a light source module according to test requirements, adjusting the torsion angles of a first 1/2 wave plate (5) and a first 1/4 wave plate (6) to determine the polarization state of the light source, regulating the size and the direction of a magnetic field of an electromagnet (10), and placing a sample in a sample groove (18); S2, the light emitted by the light source module irradiates the sample, the sample generates absorption or luminescence effect under the magnetic field or no magnetic field condition, and the effect signal is captured by the signal testing end; and S3, after the signal testing end adjusts the size of the diaphragm and the torsion angle of the wave plate, transmitting a spectrum signal to the spectrum analysis end (27), and outputting a corresponding absorption spectrum or a corresponding luminescence spectrum by the spectrum analysis end (27) to determine the magneto-optical property of the sample.

Description

Multifunctional magneto-optical test system and method Technical Field The invention relates to the technical field of spectrum testing, in particular to a multifunctional magneto-optical spectrum testing system and method, which are suitable for the fields of physics, chemistry, materials, chemical industry and the like, can realize various magneto-optical spectrum testing, and provide a comprehensive solution for research on magneto-optical properties of materials. Background The spectrum absorbed (or emitted) by the traditional test material needs to be tested singly by means of different spectrometers, so that different test methods and spectrum paths are needed under different test conditions, and other complex tests cannot be directly carried out on the basis of theoretical principles. For example, the principle of magnetic circular polarized luminescence of test materials: The traditional circular polarization luminescence spectrum instrument can not meet the flexibility requirement of material magneto-optical property analysis and research. The core principle of circular polarized luminescence is that the chiral luminescence center couples electric dipole moment and magnetic dipole moment in the radiation transition process, so that light with a net circular polarization state is emitted. The magnetically circularly polarized light is generated because the light-emitting material splits the excited state energy level under the action of the excitation light and the magnetic field due to the generation of the Zeeman effect, and the process from the degenerate state to the nondegenerate state is carried out. The circular polarization luminescence spectrum in the prior art cannot be directly introduced into a magnetic field, only circular polarization luminescence can be tested singly, irreversible damage to a sample is easily caused by a light source cannot be changed flexibly, and meanwhile, damage to a detector is caused when a laser light source is too strong, so that the service life of an instrument is influenced. Accordingly, there is a need for further improvements in the art. Disclosure of Invention Aiming at the problems that the existing spectrum test equipment is single in function, poor in flexibility and incapable of adapting to magnetic field regulation and control requirements, the invention provides the multifunctional magneto-optical spectrum test system and the method. In order to achieve the above object, the present invention provides the following technical solutions: a multifunctional magneto-optical spectrum testing system comprises a light source module, an electromagnet, a sample stage, a signal testing end and a spectrum analysis end; The sample stage is positioned on a transmission light path of the light source module, the light source module is used for outputting polarized light or unpolarized light, the sample is irradiated to generate an absorption or luminescence effect, and an effect signal is input to the signal testing end; The signal testing end is arranged on the optical path of the sample, and converts the absorption or luminous signals of the sample into corresponding spectrum signals by adjusting the polarization state or the non-polarization state of the optical path; the spectrum analysis end is connected with the signal test end and is used for acquiring and analyzing an absorption spectrum or a luminescence spectrum of a sample; the electromagnets are arranged on two sides of the sample table and are of hollow structures and used for adjusting the size and the direction of the magnetic field. As a further technical scheme of the invention, the light source module comprises one of the following two configurations: A first light source, an optical fiber coupler, an optical fiber collimator, a first polaroid and a lens component which are sequentially arranged are configured; A second configuration is that a light source, an optical fiber coupler, an optical fiber collimator, a first polaroid, a first 1/2 wave plate, a first 1/4 wave plate and a lens component are sequentially arranged; The optical fiber coupler receives and transmits light source light, the optical fiber collimator collimates the light source, the first polaroid outputs linearly polarized light, and the first 1/2 wave plate and the first 1/4 wave plate output polarized or unpolarized light source required by the test by adjusting torsion angles. The lens assembly comprises a first lens, a first diaphragm and a second lens which are sequentially arranged, wherein the first lens receives a light source and inputs the light source into the first diaphragm after focusing, the first diaphragm is used for limiting the cross section size of a light beam, and the second lens outputs the light source which passes through the diaphragm to a sample stage after refocusing. The sample table comprises a fixing frame and a sample groove, wherein the fixing frame and the sample groove are both positioned in