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Magnetic light -based spectral measurement device and spectral measurement method

A magneto-optical modulation and spectral measurement technology, applied in the field of optical measurement, can solve the problems of narrow wavelength measurement range, low resolution, and difficult production, and achieve the effect of wide spectral measurement range, high resolution, and simple and easy production

Inactive Publication Date: 2015-10-07
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the technical problems existing in the prior art, such as high cost, difficult manufacture, sensitivity to vibration, low resolution, and narrow wavelength measurement range, and provide a spectral measurement based on magneto-optical modulation. Device and Spectral Measurement Method

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  • Magnetic light -based spectral measurement device and spectral measurement method
  • Magnetic light -based spectral measurement device and spectral measurement method
  • Magnetic light -based spectral measurement device and spectral measurement method

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Embodiment Construction

[0025] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0026] The idea of ​​the present invention is to use the magneto-optic modulation device to perform magneto-optic modulation on the incident light to be measured, and change the polarization state of the light propagating in the magneto-optic medium by the magneto-optic effect, so as to achieve the purpose of changing the light intensity. The intensity of the modulated light under a set of different magnetic field strengths is measured, and the frequency spectrum of the incident light to be measured is obtained by solving a linear equation set.

[0027] The magneto-optic effect refers to various optical phenomena caused by the interaction between the magnetized substance and light, including Faraday effect, Kerr magneto-optic effect, Zeeman effect, Cotton-Mouton effect, etc. Among them, Faraday The effect refers to: when plane polarized light passes thr...

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Abstract

The invention discloses a spectral measuring device based on magneto-optic modulation, and belongs to the technical field of optical measurement. The spectral measuring device comprises a first polarizing film, a magneto-optic modulator, a second polarizing film and an optical detector. The invention further discloses a spectral measuring method using the spectral measuring device. The spectral measuring method comprises the steps that firstly, optical power detected by the optical detector when magneto-optic modulation is carried out under different magnetic field intensities is measured, obtained optical power data serve as an augmented matrix, a coefficient matrix composed of detectivity, measured by the spectral measuring device under the different magnetic filed intensities, of incident light of different frequencies is combined, and thus a linear system of equations is established; the linear system of the equations is solved, the optical power of all frequency components in incident light to be measured is obtained, linear fitting and spectrum calibration are carried out on the optical power, and the spectrum of the incident light to be measured is obtained. The spectral measuring device based on the magneto-optic modulation and spectral measuring method has the advantages of being strong in vibration resisting ability, high in resolution ratio, wide in spectral measurement range and the like.

Description

technical field [0001] The invention relates to a spectrum measuring device and a spectrum measuring method, belonging to the technical field of optical measurement. Background technique [0002] A spectrometer is an important optical instrument. It is a basic device that combines optical methods with modern electronic data processing systems to accurately analyze the structure, composition and content of substances by obtaining spectral information of the substances under study. The spectrometer has the advantages of high analysis accuracy, large measurement range, and fast speed. It is widely used in metallurgy, geology, petrochemical, medical and health, and environmental protection. It is also an indispensable remote sensing instrument for military reconnaissance, space exploration, resource and hydrological detection, etc. Equipment (see literature [Li Quanchen, Jiang Yuejuan. Principles of Spectroscopic Instruments [M], Beijing; Beijing Institute of Technology Press, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/447
Inventor 杨涛黄维许超仪明东李兴鳌周馨慧何浩培王义成
Owner NANJING UNIV OF POSTS & TELECOMM
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