@inproceedings{badc81f7a9374d36aababddf348711f9,
title = "Passive three-colour submillimetre-wave video camera",
abstract = "Stand-off detection for concealed weapons is one of the applications for passive submillimetre-wave imaging. The operating frequency (neglecting technology limitations) is often a compromise between the diffraction-limited angular resolution for a fixed maximum aperture diameter, and the extinction of the signal in obscurant layers: At high frequencies towards the 1 THz mark, excellent angular resolution is readily achievable with modest aperture diameters, while scattering and attenuation by clothing is high which creates potentially more clutter rather than improving detection capability. At lower frequencies towards 100 GHz, attenuation and scattering by clothing is much less pronounced, albeit at significantly reduced spatial definition thanks to increased diffraction. In order to avoid the abovementioned compromise, we have constructed a three-band passive imaging system operating at effective centre frequencies of 250 GHz, 450 GHz and 720 GHz. Aspects of the system will be presented.",
keywords = "bolometer, concealed weapons detection, passive imaging, stand-off detection, submillimeter-wave, thz imaging",
author = "Arttu Luukanen and Tero Kiuru and Mikko Leivo and Anssi Rautiainen and Jussi Varis",
year = "2013",
doi = "10.1117/12.2018038",
language = "English",
isbn = "978-0-8194-9506-8",
series = "Proceedings of SPIE",
publisher = "International Society for Optics and Photonics SPIE",
editor = "Wikner, {David A.} and Luukanen, {Arttu R.}",
booktitle = "Passive and Active Millimeter-Wave Imaging XVI",
address = "United States",
note = "SPIE Defense, Security, and Sensing ; Conference date: 29-04-2013 Through 03-05-2013",
}