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Proceedings Paper

SOFRADIR detector dewar cooler assemblies evolution to fulfill new market requirements
Author(s): Jean-Pierre Chatard
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Paper Abstract

Sofradir IRFPAs using MCT material are generally cooled down with classical coolers such as regulated or non regulated Joule Thomson coolers, rotary or linear closed cycle Stirling machines. By using these coolers, it is possible to satisfy a large range of application requirements. Nevertheless, the requirements for new military equipment increased during the last two years putting more pressure on cooling system requirements. On the other hand, the continuous increase of the size of available IRFPA also puts more pressure on cooling system requirements. Finally, the reduction of military budgets and the potential commercial market forces one to propose new configurations. Therefore, Sofradir has worked in the following different fields: (1) development of a very small flat detector dewar using a flat Joule Thomson cooler for severe environmental conditions such as seeker applications; (2) development of a detector dewar using the IDCA (integrated dewar/cooler) concept for high performance, and low cost application; and (3) development of detector dewar using thermoelectric coolers for low cost application. Sofradir presents the results of these activities.

Paper Details

Date Published: 17 October 1994
PDF: 12 pages
Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); doi: 10.1117/12.188659
Show Author Affiliations
Jean-Pierre Chatard, SOFRADIR (France)


Published in SPIE Proceedings Vol. 2269:
Infrared Technology XX
Bjorn F. Andresen, Editor(s)

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