19 May 2005 Passive hyperspectral terahertz imagery for security screening using a cryogenic microbolometer
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Abstract
We present passive indoor imagery of human subjects in the 100 - 1000 GHz band. In order to obtain adequate sensitivity, a cryogenically cooled (4 K), broadband antenna-coupled, superconducting microbolometer with optical noise equivalent power NEP < 2 pW/rtHz was used as the sensor. Mechanical scanning of the collecting aperture, a 30 cm diameter spherical mirror, was used to slowly accumulate the images. While not yet practical for deployable real-time cameras, this system provides valuable phenomenological comparisons with similar imagery obtained with actively illuminated systems.
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Arttu Luukanen, Arttu Luukanen, Aaron J. Miller, Aaron J. Miller, Erich N. Grossman, Erich N. Grossman, } "Passive hyperspectral terahertz imagery for security screening using a cryogenic microbolometer", Proc. SPIE 5789, Passive Millimeter-Wave Imaging Technology VIII, (19 May 2005); doi: 10.1117/12.608838; https://doi.org/10.1117/12.608838
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