Experimental Study on Terahertz Imaging Technique in Nondestructive Inspection

Terahertz imaging is a burgeoning technique. In order to utilize it in nondestructive inspection, a novel THz imaging system, which based on continuous scanning system, was proposed. By experiment, the distinct images of different samples such as concealed coin or metal platelet with small holes were acquired. The result indicated that suspicious objects could be identified easily by this system. More important, the spatial resolution of this system could be less than 0.5 mm. So we can draw a conclusion that THz imaging could be applied in nondestructive inspection successfully.