Share Email Print

Proceedings Paper

Flexure bearing compressor in the one watt linear (OWL) envelope
Author(s): I. Rühlich; M. Mai; Th. Wiedmann; C. Rosenhagen
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

For high performance IR detectors the split linear cooler is a preferred solution. High reliability, low induced vibration and low audible noise are major benefits of such coolers. Today, most linear coolers are qualified for MTTF of 8,000h or above. It is a strong customer desire to further reduce the maintenance costs on system level with significantly higher cooler lifetime. Increased cooler MTTF figures are also needed for IR applications with high lifetime requirements like missile warning applications, border surveillance or homeland security applications. AIM developed a Moving Magnet Flexure Bearing compressor to meet a MTTF of minimum 20,000h. The compressor has a full flexure bearing support on both sides of the driving mechanism. In the assembly process of the compressor an automated alignment process is used to achieve the necessary accuracy. Thus, side-forces on the pistons are minimized during operation, which significantly reduces the wear-out. In order to reduce the outgassing potential most of the internal junctions are welded and the use of all non-metallic components is minimized. The outline dimensions comply with the SADA2 requirements in length and diameter. Further, when operated with a 1/2" SADA type coldfinger, the cooler meets all specified performance data for SADA2. The compressor can be combined with different Stirling type coldfingers and also with the AIM Pulse Tube coldfinger, which gives increased lifetime potential up to 50,000h MTTF. Technical details and performance data of the new compressor are shown.

Paper Details

Date Published: 14 May 2007
PDF: 7 pages
Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65422I (14 May 2007); doi: 10.1117/12.722111
Show Author Affiliations
I. Rühlich, AIM Infrarot-Module GmbH (Germany)
M. Mai, AIM Infrarot-Module GmbH (Germany)
Th. Wiedmann, AIM Infrarot-Module GmbH (Germany)
C. Rosenhagen, AIM Infrarot-Module GmbH (Germany)

Published in SPIE Proceedings Vol. 6542:
Infrared Technology and Applications XXXIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

© SPIE. Terms of Use
Back to Top