Statistics – Applications
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3436..214l&link_type=abstract
Proc. SPIE Vol. 3436, p. 214-225, Infrared Technology and Applications XXIV, Bjorn F. Andresen; Marija Strojnik Scholl; Eds.
Statistics
Applications
Scientific paper
Sofradir is industrializing a Detector Cooler Assembly aimed at portable, low cost and low maintenance applications. The concept is based on a four stage Thermo Element Cooler (TEC) cooling down to around 200 K a 128 X 128, 50 microns pitch, Cadmium Mercury Telluride Circuit staring array, hybridized onto a Read Out Integrated Circuit (ROIC), especially designed to cope with the important dark current generated at this operating temperature and integrated in a low weight/small dimension packaging. The main feature presented in this paper regards the successful operation of the self calibration and current skimming function developed earlier but which efficiency has since been optimized. The principle results in the enhancement of the effective storage capacity as only the scene current is stored. Integration time higher than 20 ms has been demonstrated. The packaging is built around current technologies adapted to long term vacuum applications. Basic life-time testing has been performed showing promising expectations. In this paper we recall the current skimming concept and its limitations and show the improvement obtained in terms of efficiency of the self calibration. In addition to electrical results, we also present electro-optical characterization obtained with this ROIC and performances in operational conditions. Finally we describe TEC DCA under industrialization in terms of performance and operation.
Lembert Frederic
Maillart Patrick
Minassian Christophe
Reeb Nathalie
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