Gradient scattering structure spectrum analysis device and spectrum restoration method

Abstract

The invention provides a gradient scattering structure spectrum analysis device and a spectrum restoration method. The device includes a transparent substrate on which a scattering particle layer withgradient structure features is arranged. A photoelectric detector array used for receiving scattered light is arranged below the substrate. Two confocal lenses are arranged above the scattering particle layer. An aperture diaphragm is arranged between the confocal lenses. The incident light passes through the two confocal lenses and the scattering particle layer in turn. Then, scattered spots with different features are generated on the photoelectric detector array. Finally, a spectrum restoration matrix is obtained by using a method of local windowing, feature weighting and piecewise spectrum restoring of scattered spots, and the spectrum is restored by using a method of solving a large linear equation set through Tikhonov regularization. The scattering particle layer is composed of scattering particles with gradient structure features. The contradiction between wide spectrum analysis range and high spectrum resolution is solved.

Description

technical field [0001] The invention relates to the technical field of portable and intelligent miniature spectrum analysis instruments, in particular to a gradient scattering structure spectrum analysis device and a spectrum restoration method. Background technique [0002] The application of spectroscopy involves almost all fields in our life, such as chemical industry, pharmaceuticals, agricultural production, biomedicine, food safety, environmental safety, aerospace, energy and so on. With the advancement of society and the development of advanced science and technology such as Internet of Things information technology, micro-nano manufacturing, and biophotonics, large-scale and expensive spectral analysis equipment has come out of the laboratory to make up for human cognition defects in substances, and easily realize the sugar and water content of fruits and vegetables. , Drug authenticity, skin age, wine quality and other testing, it has become possible to enter people...

AI Technical Summary

Problems solved by technology

However, the spectral analysis range and spectral resolution of the spectral analysis chip of this technology need to be further improved. How to achieve a high spectral resolution within a certain width of the spectral analysis range is the primary solution for the development of computational spectroscopy technology based on scattered light spots. question

Yang Tao's research group at Nanjing University of Posts and Telecommunications proposed "Phase Modulation Step Array Micro Spectrometer" (200910264251.X), "Diffraction Hole Array Structure Micro Spectrometer and Its High Resolution Spectral Restoration Method" (201210004166.1) and "A Micro Spectrometer" (201210578653.9 ), the spectroscopic devices in the three technical schemes respectively adopt a step array structure, a diffraction hole array structure and a nanoparticle coating, but the structural characteristics of the three are periodic or disordered, which cannot solve the wide range and hyperspectral problems of spectral analysis. conflict between resolutions

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