22 July 2010 Ultra-lightweighted HB-Cesic one-meter mirror demonstrator
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Abstract
Future space missions, such as SPICA and DARWIN, require large, light-weighted, and stiff mirrors with excellent stability. During the past years, ECM fabricated a number of light-weighted mirrors. However, future large missions require further advances with light-weighting, pushing this technology to the limit possible with recently developed composite materials, new fabrication processes, and innovative designs. In 2009, ECM took steps in this direction by fabricating successfully an ultra-lightweighted HB-Cesic® mirror demonstrator 1 m in size. We demonstrated that HB-Cesic®, due to its extreme light-weighting capability and manufacturing versatility, combined with high stiffness, high mechanical strength, and low CTE at cryogenic temperatures, is able to fully meet the requirements of future large cryogenic space mirrors. In this paper we describe the fabrication process of this demonstrator and its physical characteristics.
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Matthias R. Krödel, Matthias R. Krödel, Peter Hofbauer, Peter Hofbauer, } "Ultra-lightweighted HB-Cesic one-meter mirror demonstrator", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77392K (22 July 2010); doi: 10.1117/12.856251; https://doi.org/10.1117/12.856251
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