Application of Terahertz Time Domain Spectroscopy in Identification of Textile Fiber

A method to discriminate textiles based on terahertz time-domain spectroscopy (THz-TDS) is proposed,and some commonly used synthetic fibers are investigated.The absorption spectra of uarious synthetic fibers are measured using the THz-TDS system.The experimental results show that terylene,polyamide,and vinylon have a characteristic absorption peak at 0.98 THz,1.51 THz,and 1.16 THz in their absorption spectra, respectively,while aromatic polyamide fiber,acrylic fiber,and Tencel fiber have no characteristic peaks but differ from each other very much.The research results show that it is feasible to apply terahertz time domain spectroscopy into the identification of synthetic fibers.