镜面反射综合孔径近场成像及其成像分辨率研究

    Research on Mirror Reflection Synthetic Aperture Near-field Imaging and Its Imaging Resolution

    • 摘要: 镜面反射综合孔径成像技术是一种通过非相干探测实现综合孔径成像的方法,利用功率探测获得余弦可视度函数,进而通过反演算法获得目标场景亮温图像。文中对镜面反射综合孔径成像方法的近场成像及其成像分辨率进行了理论研究,并通过点源成像实验对理论分析结果进行了实验验证,实验测得的成像角度分别为16. 07°、18. 48°、23. 73°和 27. 47°,对应的成像分辨率分别为0. 95°、0. 98°、1. 00°和1. 04°,实验结果和理论计算结果相符,表明了镜面反射综合孔径成像技术在近场成像领域应用的有效性和优越性。

       

      Abstract: The mirror reflection synthetic aperture imaging is a method to achieve synthetic aperture imaging through incoherent detection, using power detection to obtain the cosine visibility function, and then obtaining the bright temperature image of the target scene through the inversion algorithm. In this paper, the near-field imaging and imaging resolution of mirror reflection synthetic aperture imaging are theoretically studied, and the theoretical analysis results are experimentally verified by point source imaging experiments, the imaging angles measured in the experiment are 16. 07 °, 18. 48 °, 23. 73 ° and 27. 47 °, respectively, with corresponding imaging resolutions of 0. 95 °, 0. 98 °, 1. 00 °, and 1. 04 °, the experimental results are consistent with the theoretical analysis results, which shows the effectiveness and superiority of mirror reflection synthetic aperture imaging technology in the field of near-field imaging.

       

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