Optimization of a cryogenic mirror stage

Richard C. Robinson; Ronald J. Huppi; Steven L. Folkman

doi:10.1117/12.451776

25 November 2002 Optimization of a cryogenic mirror stage

Richard C. Robinson, Ronald J. Huppi, Steven L. Folkman

Proceedings Volume 4822, Cryogenic Optical Systems and Instruments IX; (2002) https://doi.org/10.1117/12.451776
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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.

Citation Download Citation

Richard C. Robinson, Ronald J. Huppi, and Steven L. Folkman "Optimization of a cryogenic mirror stage", Proc. SPIE 4822, Cryogenic Optical Systems and Instruments IX, (25 November 2002); https://doi.org/10.1117/12.451776

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