Journal
APPLIED OPTICS
Volume 54, Issue 13, Pages 3826-3833Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.54.003826
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Terahertz and infrared radiation have unique properties applicable to the field of surveillance and security systems. We investigated the possibility of detecting potentially dangerous objects covered by various types of clothing using passive imagers operating at 1.2 mm (250 GHz) and long-wavelength infrared at 6-15 mu m (20-50 THz). We developed a measurement methodology that assumes to investigate theoretical limitations, performance of imagers, and physical properties of fabrics. To evaluate stability of the detection capabilities of imagers, we performed measurement sessions each lasting 30 min. We present a theoretical comparison of the two spectra and results of experiments using state-of-the-art equipment. (C) 2015 Optical Society of America
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