AOTF高光谱成像0级干扰抑制方法研究

发布时间：2018-05-28 15:45

本文选题：光谱成像 + AOTF　；参考：《光谱学与光谱分析》2017年10期

【摘要】：随着光谱成像技术的发展,以高空间分辨率和高光谱分辨率获得的图像极大地提高了地物目标的识别能力,为准确获取地物被测目标的二维空间影像信息和一维光谱信息,设计完成一种基于声光可调滤波器(AOTF)的高光谱成像系统,但由于系统中偏振片消光比有限,导致视场外的0级光与被测目标的+1级衍射光发生重叠,而AOTF无驱动时成像可近似为0级干扰的图像,为此提出一种AOTF加驱动图像减无驱动图像的0级干扰抑制方法。并采用该系统样机进行外场光谱成像实验,对结果进行0级干扰抑制方法修正,修正后的结果表明该方法不仅大幅度消除了0级光的干扰,而且还提高了整个成像光谱的测量精度。
[Abstract]:With the development of spectral imaging technology, the high spatial resolution and high spectral resolution images greatly improve the ability of object recognition, in order to accurately obtain the two-dimensional spatial image information and one-dimensional spectral information of the object under measurement. A hyperspectral imaging system based on AOTF-based acousto-optic tunable filter is designed and completed. However, due to the limited extinction ratio of polarizers in the system, the level 0 light in the field of view overlaps with the first order diffraction light of the target under measurement. However, the imaging of AOTF without driving can be approximated to zero level interference. Therefore, a zero level interference suppression method with AOTF plus drive image subtraction is proposed. The system prototype is used for the field spectral imaging experiment, and the results are modified by the 0-order interference suppression method. The modified results show that the proposed method not only eliminates the interference of the 0-order light greatly, but also improves the performance of the system. Moreover, the measurement accuracy of the whole imaging spectrum is improved.
【作者单位】：中北大学山西省光电信息与仪器工程技术研究中心;中北大学信息与通信工程学院;中北大学电子测试技术重点实验室;
【基金】：国际科技合作项目(2013DFR10150) 国家自然科学基金青年科学基金项目(61505179,61505180,61605176)资助
【分类号】：O433;TN65;TN713

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