Passive THz imaging system for stand-off identification of concealed objects: results from a turn-key 16 pixel imager

A. Luukanen; L. Grönberg; T. Haarnoja; P. Helistö; K. Kataja; M. Leivo; A. Rautiainen; J. Penttilä; J. E Bjarnason; C. R. Dietlein; M. D. Ramirez; E. N. Grossman

doi:10.1117/12.784922

25 April 2008 Passive THz imaging system for stand-off identification of concealed objects: results from a turn-key 16 pixel imager

A. Luukanen, L. Grönberg, T. Haarnoja, P. Helistö, K. Kataja, M. Leivo, A. Rautiainen, J. Penttilä, J. E Bjarnason, C. R. Dietlein, M. D. Ramirez, E. N. Grossman

Author Affiliations +

Proceedings Volume 6948, Passive Millimeter-Wave Imaging Technology XI; 69480O (2008) https://doi.org/10.1117/12.784922
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

Passive imaging of concealed objects at stand-off distances in excess of a few meters requires both excellent spatial, thermal and temporal resolution from the terahertz imaging system. The combination of these requirements while keeping the overall system cost at a reasonable level has been the motivation for this joint work. The THz imaging system under development is capable of sub-Kelvin NETD at video frame rates. In this paper we report the first imaging results from a 16-pixel array of superconducting antenna-coupled NbN vacuum-bridge microbolometers, operated within a cryogen-free, turn-key refrigerator. In addition to the system overview, we shall also address the uniformity of the detectors and present passive indoors raster-scanned imagery.

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A. Luukanen, L. Grönberg, T. Haarnoja, P. Helistö, K. Kataja, M. Leivo, A. Rautiainen, J. Penttilä, J. E Bjarnason, C. R. Dietlein, M. D. Ramirez, and E. N. Grossman "Passive THz imaging system for stand-off identification of concealed objects: results from a turn-key 16 pixel imager", Proc. SPIE 6948, Passive Millimeter-Wave Imaging Technology XI, 69480O (25 April 2008); https://doi.org/10.1117/12.784922

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