29 April 2009 Stand-off passive THz imaging at 8-meter stand-off distance: results from a 64-channel real-time imager
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Abstract
At present, the imaging of concealed weapons and contraband is primarily carried out at a relatively short stand-off range of a few meters mainly because of spatial resolution considerations. In order to maintain a reasonable aperture size, there is a desire to extend the operating frequency towards 1 THz. In this paper we report the progress on a video-rate THz camera demonstrator which utilizes broadband antenna-coupled microbolometers as detectors, operated within a turnkey commercial closed-cycle cryocooler. A full system has been integrated consisting of 64 parallel sensors and readout electronics, and reflective Schmidt camera optics incorporating a conical scanner for real time imaging.
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Arttu Luukanen, Arttu Luukanen, Panu Helistö, Panu Helistö, Petteri Lappalainen, Petteri Lappalainen, Mikko Leivo, Mikko Leivo, Anssi Rautiainen, Anssi Rautiainen, Hans Toivanen, Hans Toivanen, Heikki Seppä, Heikki Seppä, Zach Taylor, Zach Taylor, Charles R. Dietlein, Charles R. Dietlein, Erich N. Grossman, Erich N. Grossman, } "Stand-off passive THz imaging at 8-meter stand-off distance: results from a 64-channel real-time imager", Proc. SPIE 7309, Passive Millimeter-Wave Imaging Technology XII, 73090F (29 April 2009); doi: 10.1117/12.821996; https://doi.org/10.1117/12.821996
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