Abstract

THz electromagnetic wave has been receiving increasing attention in many engineering applications because of the following characteristics. THz wave transmits many kinds of materials except for metals and water. Materials have their own fingerprint absorption spectrum. THz wave is safe for human body. Especially the transmission property of THz wave enables us to develop nondestructive inspection technique for engineering plastics. In this study, fundamental study on defect imaging for Nylon resin sample with various shaped defects was conducted. Terahertz time-domain spectroscopy (THz-TDS) system was employed for the THz scanning imaging.

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