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Proceedings Paper

Investigations on time stability of passive THz imaging
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Paper Abstract

Terahertz radiation is within the frequency range from 100 GHz to 10THz. This radiation has specific characteristics in terms of imaging. The radiation is harmless to the human body because the energy transferred by electromagnetic waves in this range of frequencies are very small thus there is no ionization of matter. The development of imaging devices and exploration of new spectral bands is a chance to introduce new equipment for assuring public safety. It has been proved that objects hidden under clothing can be detected and visualized using terahertz (THz) cameras. However, passive THz cameras still offer too low image resolution for objects recognition. In order to determine the properties of terahertz imaging for detection of hidden objects several aspects need to be considered. Taking into account the fact that the image captured by the terahertz camera reflects the spatial distribution of the relative temperature of the observed objects, the effect of the measurement time on the imaging capabilities should be examined. A very important aspect is the influence of the type (material composition) of coating material, as well as the type of an object hidden under clothing (size and material). The purpose of the studies is to investigate the time stability of passive THz imaging on 250 GHz for detection of concealed objects. In the article, we present the measurement setup, the measurement methodology as well as the initial results of measurements with various types of clothing and test objects.

Paper Details

Date Published: 7 October 2014
PDF: 7 pages
Proc. SPIE 9252, Millimetre Wave and Terahertz Sensors and Technology VII, 92520S (7 October 2014); doi: 10.1117/12.2064965
Show Author Affiliations
Marcin Kowalski, Military Univ. of Technology (Poland)
Norbert Palka, Military Univ. of Technology (Poland)
Marek Zyczkowski, Military Univ. of Technology (Poland)
Mieczyslaw Szustakowski, Military Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 9252:
Millimetre Wave and Terahertz Sensors and Technology VII
Neil Anthony Salmon; Eddie L. Jacobs, Editor(s)

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