Computer Science – Performance
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991tetr....1..249f&link_type=abstract
In NASA, Washington, Technology 2001: The Second National Technology Transfer Conference and Exposition, Volume 1 p 249-253 (SEE
Computer Science
Performance
Cameras, Far Infrared Radiation, Gallium Arsenides, Quantum Wells, Radiometers, Thermal Mapping, Aluminum Gallium Arsenides, Costs, Indium, Mercury Cadmium Tellurides, Multiplexing, Noise Temperature, Pixels, Silicon, Temperature Gradients
Scientific paper
We have built an array-based camera (FIRARI) for thermal imaging (lambda = 8 to 12 microns). FIRARI uses a square format 128 by 128 element array of aluminum gallium arsenide quantum well detectors that are indium bump bonded to a high capacity silicon multiplexer. The quantum well detectors offer good responsivity along with high response and noise uniformity, resulting in excellent thermal images without compensation for variation in pixel response. A noise equivalent temperature difference of 0.02 K at a scene temperature of 290 K was achieved with the array operating at 60 K. FIRARI demonstrated that AlGaAS quantum well detector technology can provide large format arrays with performance superior to mercury cadmium telluride at far less cost.
Forrest Kathrine A.
Jhabvala Murzy D.
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