Compact Imaging Spectrometer Based On Wollaston Prism

Imaging spectroscopy technology combined with spectroscopy and imaging,having been widely applied to civil and military fields.The imaging spectrometer based on imaging spectroscopy technology can obtain a three-dimensional data cube of measured area,including two-dimensional spatial image information and spectral information,truly realizes the fusion of spectral information and image information.Fourier transform imaging spectrometer is one of the various kinds of imaging spectrometers,having many advantages,such as large flux and high signal-to-noise ratio.The data processing of interference imaging spectrometer is the key to its application,it realizes the conversion from interference information to spectral information.But most spectral processing software only provides the basic functions of spectral image processing,and the software occupies a large amount of memory.This paper,based on the research of temporarily and spatially mixed modulated interference imaging spectroscopy,presents a compact scanning system based on Wollaston prism.By studying the spectral reconstruction algorithm of the imaging spectrometer,the spectral reconstruction system for data processing and display is built.The main research content of this paper is as follows:Firstly,the interference process of the optical system,the principle,structure of the compact scanning imaging spectroscopic system based on Wollaston prism are studied,and the parameters of the various components of the system are calculated.Especially the structural parameters of the Wollaston prism,which is the core component of the system,are designed and tested to meet the requirements of the spectral imaging system.Based on that,this paper simulates and analyzes the position of the interference fringe,designs the mechanical components to connect the components of the system,realizes the miniaturization of the system.Secondly,the Push-broom experiment is carried out based on the built imaging spectrometer,a series of images with interference fringes is obtained.This paper studies the spectral reconstruction algorithm and built the spectral reconstruction system to realize spectral data processing,display and storage,which occupies less memory,operates easily.Finally,this paper tests the system's spectral resolution,spatial resolution,and spectral recovery accuracy to verify the performance of the imaging spectrometer and spectral restoration system,completes spectral and radiometric calibrations.