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Proceedings Paper

Measured Performance Of The Philips Usfa Stirling Cycle Cooler With Various Dewars.
Author(s): R J de Putter
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Paper Abstract

Philips Usfa BV makes a range of small cryogenic coolers for cooling the sensors of thermal imaging systems. These coolers operate around 80 K and have cooling capacities of 0.25 W, 0.5 W and 1.0 W. The diameters of the "cold fingers" are respectively 5, 7 and 10mm. The standard compressor used at present has a diameter of 71mm and a length of 145mm, and we are currently developing two new compressors : one for the 0.25 W and 0.5 W cold fingers and one for the 1.0 W cold finger. The 1.0 W compressor has a diameter of 60mm and a length of 122mm. The compressor for the 0.25 W and 0.5 W cold fingers is 44mm in diameter and 142mm long. During the last few years a lot of experience has been gained with various cooler-Dewar combinations, one of the most widely used being the 0.5 W type UA 7041 cooler combined with the R185 Mullard Dewar, a TICM class II Dewar containing Sprite detectors. This paper mainly reports on the measured performance of the UA 7041 cooler with this Dewar. It includes : - basic technical principles of the cooler. - typical cooling capacity of the UA 7041. - typical cooling demand of the R185 Dewar. - performance of the UA 7041 - R185 combination. - performance of the UA 7043 - R175 combination. - results of lifetime testing.

Paper Details

Date Published: 3 October 1988
PDF: 3 pages
Proc. SPIE 0915, Recent Developments in Infrared Components and Subsystems, (3 October 1988); doi: 10.1117/12.945537
Show Author Affiliations
R J de Putter, Philips Usfa B.V (The Netherlands)


Published in SPIE Proceedings Vol. 0915:
Recent Developments in Infrared Components and Subsystems

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