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8 April 2004 Component pattern analysis of chemicals using multispectral THz imaging system
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Abstract
We have developed a novel basic technology for terahertz (THz) imaging, which allows detection and identification of chemicals by introducing the component spatial pattern analysis. The spatial distributions of the chemicals were obtained from terahertz multispectral transillumination images, using absorption spectra previously measured with a widely tunable THz-wave parametric oscillator. Further we have applied this technique to the detection and identification of illicit drugs concealed in envelopes. The samples we used were methamphetamine and MDMA, two of the most widely consumed illegal drugs in Japan, and aspirin as a reference.
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Kodo Kawase, Yuichi Ogawa, and Yuki Watanabe "Component pattern analysis of chemicals using multispectral THz imaging system", Proc. SPIE 5354, Terahertz and Gigahertz Electronics and Photonics III, (8 April 2004); https://doi.org/10.1117/12.528517
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