Grating spectrometer capable of realizing spectral super-resolution reduction

Abstract

The invention discloses a grating spectrometer capable of realizing spectral super-resolution reduction, and relates to the field of spectral measurement. The grating spectrometer structurally comprises an incident slit, a diaphragm, a collimating reflector, a diffraction grating, a converging reflector, a linear array detector, a piezoelectric ceramic driving platform, a piezoelectric ceramic controller and a data processing system, wherein light to be detected enters the incident slit, is reflected to the diffraction grating through the collimating reflector, and is focused to form a spectral image on a pixel array of the linear array detector through the converging reflector after being split by the diffraction grating; the linear array detector is fixedly arranged on the piezoelectric ceramic driving platform; the piezoelectric ceramic driving platform is controlled by the piezoelectric ceramic controller to be slightly displaced in a dispersion direction to finish measurement once until the piezoelectric ceramic driving platform is displaced for N+1 times; data obtained in the first N times is processed by the data processing system to obtain spectral data by spectral super-resolution reduction. The grating spectrometer is simple in structure; all the parts except the one-dimensional piezoelectric ceramic driving platform are fixed, so that high spectral resolution can be achieved within a wide spectral range.

Description

technical field [0001] The invention relates to the field of spectral measurement, in particular to a grating spectrometer structure capable of realizing spectral super-resolution reduction. Background technique [0002] A spectrometer is an instrument used for spectral measurement and analysis, and is widely used in chemical analysis, industrial detection, aerospace remote sensing and other fields. Among them, the grating spectrometer has the advantages of small size, wide spectral range, and simple structure, and has become the most important type of spectrometer on the market. However, limited by the pixel size and number of pixels of the linear array detector, the spectral range and spectral resolution of the spectrometer cannot be well coordinated, that is, a high spectral resolution cannot be guaranteed in the case of a large spectral range. In addition, due to the influence of the incident slit and the exit slit, the spectral bandwidth is broadened, and the spectral ...

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Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a grating spectrometer that can achieve spectral super-resolution reduction, which solves the problem that the grating spectrometer is limited by the entrance slit and the exit slit, the spectral resolution is low, and the linear array The problem that the detector pixel number and pixel size limitation, spectral range and spectral resolution cannot be well coordinated

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