28 December 1998 Passive millimeter-wave imaging for contraband detection
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Proceedings Volume 3575, Enforcement and Security Technologies; (1998); doi: 10.1117/12.335003
Event: Enabling Technologies for Law Enforcement and Security, 1998, Boston, MA, United States
Abstract
As a result of its relatively short wavelength, coupled with relatively high penetration of many materials, millimeter-wave imaging provides a powerful tool for the detection of concealed articles. By using a passive approach such as that implemented here, it is possible to image (detect) concealed weapons and articles or look through certain types of walls, all without generating any form of radiation that might raise health concerns. In this paper, we present details of the upgrades to our imager that will result in a wide field of view imaging at better than 20 Hz frame rate and with an instantaneous sensitivity of better than 5 Kelvin. High resolution image data taken at stand-off distances of 12 to 27 feet are presented as representing state-of-the-art in passive millimeter-wave imaging. Details of the next generation passive imager, which will produce true real-time images with better than 1 Kelvin sensitivity will be discussed.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stuart Enz Clark, John A. Lovberg, Joseph A. Galliano, "Passive millimeter-wave imaging for contraband detection", Proc. SPIE 3575, Enforcement and Security Technologies, (28 December 1998); doi: 10.1117/12.335003; https://doi.org/10.1117/12.335003
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KEYWORDS
Extremely high frequency

Imaging systems

Passive millimeter wave imaging

Antennas

Bragg cells

Weapons

Radar imaging

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