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20 May 2011 Towards infrared DDCA with an imaging function
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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 array (FPA) with micro-sized pixels, this miniaturisation will become feasible with the integration of optical functions in the detector area. In the field of cooled infrared imaging system, 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 an imagery function can be added to the dewar by simply integrating a single meniscus inside the cold shield. An infrared system with a wide field of view and high throughput is thus obtained without adding optics outside the dewar. The additional mass of the optic is sufficiently small to be compatible with the cryogenic environment of the DDCA. The temperature stabilization of the optic and the reduction of the background radiation are the main advantages of this system. The performance of this camera will be discussed and several evolutions of this camera will be introduced too.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guillaume Druart, Florence de la Barriere, Nicolas Guérineau, Joel Deschamps, Manuel Fendler, Nicolas Lhermet, Jacques Rulliere, Serge Magli, Yann Reibel, and Jean-Baptiste Moullec "Towards infrared DDCA with an imaging function", Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 801228 (20 May 2011);


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