Magnetic light -based spectral measurement device and spectral measurement method

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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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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