Millimeter-Wave and Terahertz Imaging in Security Applications

Salmon, NA, Luukanen, A, Appleby, R and Kemp, M (2013) Millimeter-Wave and Terahertz Imaging in Security Applications. In: Terahertz Spectroscopy and Imaging. Springer Series in Optical Sciences (171). Springer, Berlin, pp. 491-520. ISBN 9783642295638 (hardback); 9783642439049 (softcover); 9783642295645 (ebook)

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Abstract

The relatively short wavelength of mm-wave and THz radiation coupled with good transmission through many dielectric materials allows images to be formed of concealed objects. This chapter gives an overview of the detectors, their associated circuitry, and system developments over the past 10 years, focussing on personnel security screening. We will discuss the phenomenology of imaging at these wavelengths, introduce the reader to the basic architectures being used and developed for image forming instruments, show examples of systems, and also discuss the feasibility of spectroscopic THz imaging for security screening applications.