双强度调制静态傅里叶变换偏振成像光谱系统测量原理及仿真

发布时间：2019-07-08 14:44

【摘要】：为了抑制背景噪声,获得高信噪比的纯干涉条纹并实现图像、光谱和全偏振信息的同时测量,提出了一种基于双强度调制的静态傅里叶变换偏振成像光谱技术新方案.系统由前置望远系统、两个相位延迟器构成的偏振来谱调制模块、Wollaston棱镜构成的偏振.分束器、Savart偏光镜和线偏振器构成的干涉|饪橐约癈CD面阵探测器组成,可在单一探测器上同时获取两幅经过不同强度调制的全偏振干涉图,通过对两幅全偏振干涉图的简单加减运算,便可获得探测目标清晰的纯图像和高信噪比的纯干涉条纹.对该系统的图像和光谱偏振复原过程进行了理论分析和数值摸拟,结果表明该系统可有效分离探测目标的背景图像和干涉图像,实现高精度的光谱复原和全偏振信息的有效提取,具有氋稳定性、高光谱、高灵敏度、高信噪比、信息复原精度高及数据处理复杂度低等优点,为偏振干涉成像光谱技术的发展提供了新思路.
[Abstract]:In order to suppress background noise, obtain pure interference fringes with high signal-to-noise ratio (SNR) and measure image, spectrum and full polarization information at the same time, a new scheme of static Fourier transform polarization imaging spectroscopy based on biintensity modulation is proposed. The system consists of a front looking remote system, a polarization spectrum modulation module composed of two phase delayers and a polarization composed of Wollaston prism. The interference of beam splitter, Savart polarizer and line polarizer is composed of Ligularia ligularia CD area array detector. Two fully polarized interferogram with different intensity modulation can be obtained at the same time on a single detector. By simply adding and subtracting the two fully polarized interferogram, the clear pure image of the detected target and the pure interference fringes with high signal-to-noise ratio can be obtained. by means of simple addition and subtraction of the two fully polarized interferogram, the clear pure image of the detected target and the pure interference fringes with high signal-to-noise ratio can be obtained. The theoretical analysis and numerical simulation of the image and spectral polarization restoration process of the system show that the system can effectively separate the background image and interference image of the detected target, realize high precision spectral restoration and effective extraction of full polarization information, and has the advantages of stability, high spectrum, high sensitivity, high signal-to-noise ratio, high precision of information restoration and low complexity of data processing. It provides a new idea for the development of polarization interferometric imaging spectroscopy.
【作者单位】：中北大学理学院;山西省光电信息与仪器工程技术研究中心;中北大学电子测试技术重点实验室;中北大学信息与通信工程学院;
【基金】：国家国际科技合作专项(批准号:2013DFR10150) 国家自然科学基金(批准号:61127015,61471325,61505179) 山西省青年科技研究基金(批准号:2014021012)资助的课题~~
【分类号】：O43

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