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Proceedings Paper

Non-invasive mail inspection system with terahertz radiation
Author(s): Hiromichi Hoshina; Yoshiaki Sasaki; Aya Hayashi; Chiko Otani; Kodo Kawase
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Paper Abstract

Using the high penetrability of the terahertz waves and the characteristic absorption spectra in this frequency range, we built a non-invasive mail inspection system targeting drugs and explosives. The system is composed of two stages; in the first stage, the scattering of a continuous terahertz wave is used for selecting mail that contains concealed powder; in the second stage, the absorption spectrum of the suspicious mail is measured and the material is identified using a terahertz spectrum database. We evaluated the performance and the limits of the inspection system.

Paper Details

Date Published: 30 April 2009
PDF: 11 pages
Proc. SPIE 7311, Terahertz Physics, Devices, and Systems III: Advanced Applications in Industry and Defense, 731103 (30 April 2009); doi: 10.1117/12.819306
Show Author Affiliations
Hiromichi Hoshina, The Institute of Physical and Chemical Research RIKEN (Japan)
Yoshiaki Sasaki, The Institute of Physical and Chemical Research RIKEN (Japan)
Aya Hayashi, The Institute of Physical and Chemical Research RIKEN (Japan)
Chiko Otani, The Institute of Physical and Chemical Research RIKEN (Japan)
Kodo Kawase, Nagoya Univ. (Japan)


Published in SPIE Proceedings Vol. 7311:
Terahertz Physics, Devices, and Systems III: Advanced Applications in Industry and Defense
Mehdi Anwar; Nibir K. Dhar; Thomas W. Crowe, Editor(s)

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