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Proceedings Paper

Powder retection with T-ray imaging
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Paper Abstract

Pulsed THz imaging systems have a number of potential advantages in inspection applications. They provide amplitude and phase information across a broad spectral range in the far-infrared, and many common packaging materials are relatively transparent in this frequency range. We use T-ray imaging to allow the identification of different powdered materials concealed inside envelopes. Using the terahertz spectral information we show that different powders may be uniquely identified. Different thicknesses of the powders are imaged to investigate the influence of scattering on the measured THz pulses and the classification model is extended to allow it to identify different materials independent of the material thickness.

Paper Details

Date Published: 29 July 2003
PDF: 10 pages
Proc. SPIE 5070, Terahertz for Military and Security Applications, (29 July 2003); doi: 10.1117/12.504294
Show Author Affiliations
Bradley S. Ferguson, Rensselaer Polytechnic Institute (United States)
CRC for Sensor Signal and Information Processing (United States)
Univ. of Adelaide (Australia)
Shaohong Wang, Rensselaer Polytechnic Institute (United States)
Hua Zhong, Rensselaer Polytechnic Institute (United States)
Derek Abbott, Univ. of Adelaide (Australia)
Xi-Cheng Zhang, Rensselaer Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 5070:
Terahertz for Military and Security Applications
R. Jennifer Hwu; Dwight L. Woolard, Editor(s)

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