Development trends in IR detector coolers

M. Mai; I. Rühlich; Th. Wiedmann; C. Rosenhagen

doi:10.1117/12.822438

11 May 2009 Development trends in IR detector coolers

M. Mai, I. Rühlich, Th. Wiedmann, C. Rosenhagen

Proceedings Volume 7298, Infrared Technology and Applications XXXV; 729819 (2009) https://doi.org/10.1117/12.822438
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

For different IR application specific cooler requirements are needed to achieve best performance on system level. Handheld applications require coolers with highest efficiency and lowest weight. For application with continuous operation, i.e. border surveillance or homeland security, a very high MTTF is mandatory. Space applications additionally require extremely high reliability. In other application like fighter aircraft sufficient cooling capacity even at extreme high reject temperatures has to be provided. Meeting all this requirements within one cooler design is technically not feasible. Therefore, different coolers designs like integral rotary, split rotary or split linear are being employed. The use of flexure bearings supporting the driving mechanism has generated a new sub-group for the linear coolers; also, the coolers may either use a motor with moving magnet or with moving coil. AIM has mainly focussed on long life linear cooler technology and therefore developed a series of moving magnet flexure bearing compressors which meets MTTF's exceeding 20,000h (up to 50,000h with a Pulse-Tube coldfinger). These compressors have a full flexure bearing support on both sides of the driving mechanism. Cooler designs are being compared in regard to characteristic figures as described above.

Citation Download Citation

M. Mai, I. Rühlich, Th. Wiedmann, and C. Rosenhagen "Development trends in IR detector coolers", Proc. SPIE 7298, Infrared Technology and Applications XXXV, 729819 (11 May 2009); https://doi.org/10.1117/12.822438

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KEYWORDS

Cryocoolers

Reliability

Infrared detectors

Standards development

Contamination

Detector development

Helium

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