Comparison of Propagation Losses in THz and Optical Non-Line-of-Sight Imaging
Comparison of Propagation Losses in THz and Optical Non-Line-of-Sight Imaging
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DOI：
10.1109/apusncursinrsm.2019.8888705
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
Yiran Cui;G. Trichopoulos
中科院分区：
文献类型：
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作者：
Yiran Cui;G. Trichopoulos
我们研究了太赫兹（THz）非视线（NLoS）成像的传播损耗，并将其性能与光学成像进行了比较。NLoS成像利用电磁波从周围表面的多次反射来重建隐藏物体的几何形状和位置。THz和可见/红外辐射对于NLoS成像是有吸引力的，这是由于短波长和可以支持这种非常规成像的实用孔径。然而，散射机制变化很大，并决定了重建图像的质量。这项工作首次比较了一个简单的太赫兹和光学NLoS成像拓扑结构的自由空间路径损耗和粗糙表面散射损耗。由于镜面反射在THz散射中占主导地位，而光学系统遭受强漫散射，因此THz NLoS成像系统可以接收相当强的反向散射信号。
We investigate the propagation losses in terahertz (THz) non-line-of-sight (NLoS) imaging and compare the performance to the optical counterpart. NLoS imaging exploits the multiple reflections of electromagnetic waves from surrounding surfaces to reconstruct the geometry and location of hidden objects. THz and visible/infrared radiations are attractive for NLoS imaging due to the short wavelengths and practical apertures that can support this non-conventional imaging. However, the scattering mechanisms vary significantly and determine the quality of the reconstructed images. This work compares for the first time the free-space path loss and rough surface scattering losses of a simple THz and optical NLoS imaging topology. Because specular reflections are dominant in THz scattering while optical systems suffer from strong diffuse scattering, THz NLoS imaging systems can receive considerably stronger backscattered signals.