太赫兹干涉成像是一种基于频谱域的成像方法, 通过对目标场景的频谱域信息采样重构目标图像, 避免了逐像素扫描, 所需的探测阵元数目少, 在图像获取速率和成像分辨率上具有发展潜力。研究了太赫兹干涉成像原理及其实现方法, 分析了成像分辨率和有效视场问题。通过仿真实验分析了目标场景中存在噪声对成像质量的影响, 表明干涉成像对目标噪声较为敏感。对安检应用场景的反射成像模式进行了分析, 证明了原理系统的适用性。仿真结果所得结论可为太赫兹干涉成像系统设计和实际应用提供理论依据和技术支持。

Terahertz interferometric imaging technique based on the spectral domain, by sampling information of the spectral domain of the target scene to reconstruct the target image. It offers considerable potential in image acquisition rate and resolution for avoidance of scanning each pixel and ability to image with only a handful of detector elements. The terahertz interferometric imaging principle and implementation method were researched, then imaging resolution and effective field of view were focused on. Simulation experiments were carried out to analyze the influence of noise in target scene for imaging quality, and the results show that interferometric imaging is sensitive to noise. The reflection imaging model in security check was focused on which validated the applicability of the principle system. The conclusions from the simulation results may offer some theoretic evidence and technical support to designs of terahertz interferometric imaging system and practical applications.