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Proceedings Paper

Optimization of a cryogenic mirror stage
Author(s): Richard C. Robinson; Ronald J. Huppi; Steven L. Folkman
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Paper Abstract

There is a current trend in space-based remote sensing toward long duration missions that produce hyper-spectral imaging data. One instrument that is uniquely suited to hyperspectral imaging is the infrared Michelson spectrometer. Michelson spectrometers use a translating mirror stage to vary the optical path length of one leg of the interferometer. Infrared applications often require cooling of this stage to achieve optimum performance. This cryogenic mirror stage is a critical spectrometer component that must be designed and constructed to achieve high reliability and performance during long duration missions. This paper concentrates on three specific areas of optimization. First, an accelerated lifetime test was performed on the mirror stage, with particular attention to the flexural pivots in the joints of the structure. There was no change seen over 22 million translation cycles. Second, a vibration model was created to predict the stage's response to launch and operational accelerations. The model's results closely matched measured values obtained during shake tests of the mirror stage. Third, a cryogenic mirror design was improved to decrease its weight and increase its stability over a wide temperature range. The improved design offers excellent performance for cryogenic operation.

Paper Details

Date Published: 25 November 2002
PDF: 10 pages
Proc. SPIE 4822, Cryogenic Optical Systems and Instruments IX, (25 November 2002); doi: 10.1117/12.451776
Show Author Affiliations
Richard C. Robinson, Stewart Radiance Lab. (United States)
Ronald J. Huppi, Stewart Radiance Lab. (United States)
Steven L. Folkman, Utah State Univ. (United States)

Published in SPIE Proceedings Vol. 4822:
Cryogenic Optical Systems and Instruments IX
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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