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26 May 2011 High-resolution passive video-rate imaging at 350 GHz
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Abstract
We are developing a 350 GHz cryogenic passive video imaging system for use in standoff security applications. This demonstration system uses 800 photon-noise-limited superconducting transition edge sensor bolometers, read out using a time-division multiplexed readout system. It will image a 1 m x 1 m field of view at a standoff distance of 16 m to a resolution of approximately 1 cm at video frame rates (20 frames per second). High spatial resolution is achieved by the use of an f/2.0 Cassegrain optical system with 1.3 m primary mirror. Preliminary dark and optical testing of prototype detectors indicates that we can achieve a noise equivalent temperature difference (NETD) below 100 mK for the fully sampled 1 m x 1 m image at 20 frames per second. We report on the current status of development of this system.
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Daniel Becker, Cale Gentry, Peter Ade, James Beall, Hsiao-Mei Cho, Simon Dicker, William Duncan, Mark Halpern, Gene Hilton, Kent Irwin, Peter Lowell, Michael Niemack, Nick Paulter, Carl Reintsema, Frank Schima, Robert Schwall, and Carole Tucker "High-resolution passive video-rate imaging at 350 GHz", Proc. SPIE 8022, Passive Millimeter-Wave Imaging Technology XIV, 802206 (26 May 2011); https://doi.org/10.1117/12.884374
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