We have introduced a correlating synthesis (CS) method for high-resolution terahertz (THz) imaging. The efficiency of the CS method was verified by imaging experiment of metal cylinders using a pulse reflection mode terahertz time-domain-spectrometry system. In this paper, we study the influence of layered dielectric in the propagation path of THz wave. A method of propagation time correction by ray tracing in the dielectric layer is proposed. The efficiency on decreasing the distortion and artifact images is verified by imaging experiment with a dielectric substrate board. Moreover, it is noticed that the appropriate correlation interval used in CS processing depends on the shape of the target. We propose a method of synthesizing the images derived from a series of different correlation intervals, which ensures the robustness of parameter independent with the target. The efficiency of the proposed method is verified by comparison imaging experiments using samples of different targets on a substrate board.

我们介绍了一种用于高分辨率太赫兹 (THz) 成像的相关合成 (CS) 方法。通过使用脉冲反射模式太赫兹时域光谱系统的金属圆柱体成像实验验证了 CS 方法的效率。在本文中，我们研究了分层电介质对太赫兹波传播路径的影响。提出了一种通过射线追踪在介质层中进行传播时间校正的方法。通过使用介电基板的成像实验验证了减少失真和伪影图像的效率。此外，注意到在 CS 处理中使用的适当相关间隔取决于目标的形状。我们提出了一种合成来自一系列不同相关区间的图像的方法，保证了与目标无关的参数的鲁棒性。通过使用基板上不同目标的样本进行对比成像实验，验证了所提出方法的效率。