Abstract

With the progress of the terahertz (THz) radiation source, detectors and system technology, Non-Destructive testing (NDT) based on the THz are possible. Because terahertz radiation is Transparent in the most of dielectric, the NDT based on the THz has great potential on inspecting the hidden defects of conductive materials. This paper reviews the application of terahertz radiation in NDT. The basic principle and characteristics of terahertz NDT are summarized, and the latest advancements in applied and theoretical researches about terahertz NDT are presented.

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