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Proceedings Paper

1.56 Terahertz 2-frames per second standoff imaging
Author(s): Thomas M. Goyette; Jason C. Dickinson; Kurt J. Linden; William R. Neal; Cecil S. Joseph; William J. Gorveatt; Jerry Waldman; Robert Giles; William E. Nixon
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Paper Abstract

A Terahertz imaging system intended to demonstrate identification of objects concealed under clothing was designed, assembled, and tested. The system design was based on a 2.5 m standoff distance, with a capability of visualizing a 0.5 m by 0.5 m scene at an image rate of 2 frames per second. The system optical design consisted of a 1.56 THz laser beam, which was raster swept by a dual torsion mirror scanner. The beam was focused onto the scan subject by a stationary 50 cm-diameter focusing mirror. A heterodyne detection technique was used to down convert the backscattered signal. The system demonstrated a 1.5 cm spot resolution. Human subjects were scanned at a frame rate of 2 frames per second. Hidden metal objects were detected under a jacket worn by the human subject. A movie including data and video images was produced in 1.5 minutes scanning a human through 180° of azimuth angle at 0.7° increment.

Paper Details

Date Published: 14 February 2008
PDF: 11 pages
Proc. SPIE 6893, Terahertz Technology and Applications, 68930J (14 February 2008); doi: 10.1117/12.764672
Show Author Affiliations
Thomas M. Goyette, Univ. of Massachusetts, Lowell (United States)
Jason C. Dickinson, Univ. of Massachusetts, Lowell (United States)
Kurt J. Linden, Spire Corp. (United States)
William R. Neal, Spire Corp. (United States)
Cecil S. Joseph, Univ. of Massachusetts, Lowell (United States)
William J. Gorveatt, Univ. of Massachusetts, Lowell (United States)
Jerry Waldman, Univ. of Massachusetts, Lowell (United States)
Robert Giles, Univ. of Massachusetts, Lowell (United States)
William E. Nixon, U.S. Army National Ground Intelligence Ctr. (United States)

Published in SPIE Proceedings Vol. 6893:
Terahertz Technology and Applications
Kurt J. Linden; Laurence P. Sadwick, Editor(s)

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