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Passive Terahertz Wave Imaging with a Single Bolometer and with a Bolometer Array

Semenov, Alexey und Richter, Heiko und Hübers, Heinz-WIlhelm und Zakosarenko, Vjatcheslav und May, Torsten und Anders, Susanne und Schultz, M. und Meyer, Hans-Georg und Kreysa, Ernst und Jethava, N. und Il'in, Konstantin und Siegel, Michael (2006) Passive Terahertz Wave Imaging with a Single Bolometer and with a Bolometer Array. In: International Forum on Terahertz Spectroscopy and Imaging. University of Kaiserslautern. 2nd Workshop on Teahertz Technology, 2006-03-01 - 2006-03-02, Kaiserslautern (Germany). (nicht veröffentlicht)

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Kurzfassung

Detection of concealed threats like guns, knifes or explosives is of prime importance at airports and other public places. Passive millimetre wave (mmW) imagers operating at frequencies up to almost 100 GHz have been demonstrated for this application. However with increasing distance to the object under investigation they suffer from limited spatial resolution and sensitivity. In this paper we demonstrate passive indoor imaging up to a distance of 7 m. For the initial experiments a Silicon bolometer cooled to 4.2 K was used as detector. The bolometer has a NEP of ~1.5 10-13 W/Hz1/2. It is sensitive in the range from 90 GHz to 3 THz. Images were taken with a mechanical scanner which moves the field of view of the detector across the object under investigation. Although it was possible to take images of hidden objects even at a distance up to 7 m a Silicon bolometer is not the optimal choice for imaging, because it is not a background limited detector and its response time is too large for real time video rate imaging. Also it is not a simple task to implement it into large format focal plane arrays (FPAs). To increase the imaging speed, we implemented a focal-plane array of millimeter-wave superconducting transition-edge sensors red out via superconducting quantum interference device current sensors. This decreased the acquisition time significantly.

Dokumentart:Konferenzbeitrag (Poster)
Titel:Passive Terahertz Wave Imaging with a Single Bolometer and with a Bolometer Array
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Semenov, AlexeyNICHT SPEZIFIZIERT
Richter, HeikoNICHT SPEZIFIZIERT
Hübers, Heinz-WIlhelmNICHT SPEZIFIZIERT
Zakosarenko, VjatcheslavInstitute for Physical High Technology, Jena, Germany
May, TorstenInstitute for Physical High Technology, Jena, Germany
Anders, SusanneInstitute for Physical High Technology, Jena, Germany
Schultz, M.Institute for Physical High Technology, Jena, Germany
Meyer, Hans-GeorgInstitute for Physical High Technology, Jena, Germany
Kreysa, ErnstMax-Planck Institute for Radioastronomy, Bonn, Germany
Jethava, N.Max-Planck Institute for Radioastronomy, Bonn, Germany
Il'in, KonstantinUniversity of Karlsruhe, Germany
Siegel, MichaelUniversity of Karlsruhe
Datum:2 März 2006
Erschienen in:International Forum on Terahertz Spectroscopy and Imaging
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Verlag:University of Kaiserslautern
Status:nicht veröffentlicht
Stichwörter:terahertz waves, imaging, superconducting bolometer
Veranstaltungstitel:2nd Workshop on Teahertz Technology
Veranstaltungsort:Kaiserslautern (Germany)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-03-01 - 2006-03-02
Veranstalter :University of Kaiserslautern (Germany)
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Projekt SOFIA (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Terahertz- und Infrarotsensorik
Hinterlegt von: Prof.Dr. Alexey Semenov
Hinterlegt am:23 Okt 2006
Letzte Änderung:27 Apr 2009 12:56

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