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Proceedings Paper

Integration of wide field-of-view imagery functions in a detector dewar cooler assembly
Author(s): Guillaume Druart; Florence de la Barriere; Nicolas Guerineau; Gilles Lasfargues; Manuel Fendler; Nicolas Lhermet; Jean Taboury; Yann Reibel; Jean-Baptiste Moullec
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Paper Abstract

Today, both military and civilian applications require miniaturized optical systems in order to give an imagery function to vehicles with small payload capacity. After the development of megapixel focal plane arrays (FPA) with micro-sized pixels, this miniaturization will become feasible with the integration of optical functions in the detector area. In the field of cooled infrared imaging systems, the detector area is the Detector-Dewar-Cooler Assembly (DDCA). A dewar is a sealed environment where the detector is cooled on a cold plate. We show in this paper that wide field of view imagery functions can be simply added to the dewar. We investigate two ways of integration and make two demonstrators. The first one called FISBI consists in replacing the window by a fish-eye lens and in integrating a lens in the cold shield. This optical system has a field of view of 180°. The second one, called IR-Cam-on-Chip, consists in integrating the optics directly on the focal plane array. This optical system has a field of view of 120°. The additional mass of the optics is sufficiently small to be compatible with the cryogenic environment of the DDCA. The performance of these cameras will be discussed and several evolutions of these cameras will be introduced too.

Paper Details

Date Published: 31 May 2012
PDF: 10 pages
Proc. SPIE 8353, Infrared Technology and Applications XXXVIII, 835322 (31 May 2012); doi: 10.1117/12.919177
Show Author Affiliations
Guillaume Druart, ONERA (France)
Florence de la Barriere, ONERA (France)
Nicolas Guerineau, ONERA (France)
Gilles Lasfargues, CEA-LETI, MINATEC (France)
Manuel Fendler, CEA-LETI, MINATEC (France)
Nicolas Lhermet, CEA-LETI, MINATEC (France)
Jean Taboury, Institut d'Optique Graduate School (France)
Yann Reibel, SOFRADIR (France)
Jean-Baptiste Moullec, Direction Générale de L'armement (France)

Published in SPIE Proceedings Vol. 8353:
Infrared Technology and Applications XXXVIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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