太赫兹成像技术在无损检测中的实验研究

摘要

Terahertz imaging is a technique which is under fast developing. In order to utilize it in nondestructive inspection,a novel THz imaging system, which based on continuous scanning system, is proposed. By experiment, the distinct images of different samples such as concealed coin or metal platelet with small holes are acquired. The result indicates that suspicious metal objects can be identified easily by this system. More important, the spatial resolution of this system is better than 0. 5 mm. So we can draw a conclusion that THz imaging can be applied in nondestructive inspection successfully.%太赫兹成像是一种新兴技术,为了将其应用在无损检测领域,提出了一种基于连续扫描的新型太赫兹成像系统.通过对隐藏的硬币和带小孔的金属板等样品进行检测,得到了清晰的图像.实验结果表明通过本成像系统可以对隐藏的金属样品进行鉴别,其空间分辨率低于0.5 mm.因而本系统可以成功地应用于无损检测.