9 February 2009 Feature extraction and identification of explosive materials in reflective terahertz spectroscopic imaging system
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Abstract
We present a novel feature extraction technique for identification of explosive and biological materials using terahertz reflective time domain spectroscopy (THz-RTDS). The absorption signatures of the materials are extracted directly from the derivative of the amplitude reflectance without measuring the phase shift caused by the sample's height. This technique provides a straightforward and fast solution to solve the phase-retrieval problem in RTDS and will benefit the future development of standoff, large size focal-plane THz sensing and imaging system.
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Yu Wang, Yu Wang, Liangliang Zhang, Liangliang Zhang, Chao Deng, Chao Deng, Weiwei Li, Weiwei Li, Hua Zhong, Hua Zhong, Cunlin Zhang, Cunlin Zhang, } "Feature extraction and identification of explosive materials in reflective terahertz spectroscopic imaging system", Proc. SPIE 7158, 2008 International Conference on Optical Instruments and Technology: Microelectronic and Optoelectronic Devices and Integration, 71580V (9 February 2009); doi: 10.1117/12.805641; https://doi.org/10.1117/12.805641
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