Real-time passive terahertz imaging system for standoff concealed weapons imaging

被引：11

作者：

Luukanen, Arttu ^{[1
]}

Gronberg, Leif ^{[2
]}

Gronholm, Markus ^{[2
]}

Lappalainen, Petteri ^{[2
]}

Leivo, Mikko ^{[2
]}

Rautiainen, Anssi ^{[2
]}

Tamminen, Aleksi ^{[3
]}

Ala-Laurinaho, Juha ^{[3
]}

Dietlein, Charles R. ^{[4
,5
]}

Grossman, Erich N. ^{[4
]}

机构：

[1] VTT Tech Res Ctr Finland, Millimetre Wave Lab Finland MilliLab, Tietotie 3, FI-02044 Espoo, Finland

[2] VTT Tech Res Ctr Finland, Espoo 02044, Finland

[3] Aalto Univ, Sch Sci & Technol, Millimetre Wave Lab Finland, MilliLab, FI-00076 Aalto, Finland

[4] Natl Inst Stand & Technol, Div Optoelect, Boulder, CO 80305 USA

[5] US Army, Res Lab, Adelphi, MD 20783 USA

来源：

PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY XIII | 2010年 / 7670卷

基金：

芬兰科学院;

关键词：

THz; Terahertz; Passive; video rate; bolometer; cryogenic sensors; stand-off detection;

D O I：

10.1117/12.850369

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The performance of stand-off imaging systems of concealed weapons in the mm-wave range remains limited by the relatively poor angular resolution using practical aperture sizes. For this reason, increasing the operating frequency of the systems is desired, but in practice is hard to realize due to the lack of affordable, low noise amplifiers well beyond 100 GHz. In this paper we present a passive terahertz imaging system which acquires passive terahertz (similar to 200 GHz-similar to 1 THz) imagery near video frame rate. The system, one copy of which is built in Finland and the other in the U. S., is based on a 64 pixel linear array of superconducting antenna-coupled microbolometers operated within a commercial cryogen-free closed cycle cryocooler, and utilizes conical scanning Schmidt optics. Quantitative measurements on the imager resolution metrics (thermal, spatial and temporal) will be presented. The results from field tests at the Helsinki-Vantaa airport will be presented.

引用

页数：8

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