Trade study of all-SiC lightweight primary mirror and metering structures for spaceborne telescopes

Haeng-Bok Lee; Jin-Young Suk; Jong-In Bae

doi:10.1117/12.2188826

3 September 2015 Trade study of all-SiC lightweight primary mirror and metering structures for spaceborne telescopes

Haeng-Bok Lee, Jin-Young Suk, Jong-In Bae

Proceedings Volume 9574, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems II; 95740D (2015) https://doi.org/10.1117/12.2188826
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

Silicon carbide (SiC) is the best material for various spaceborne telescope mirrors and structural pieces since it is high stiffness, low thermal expansion, high thermal conductivity and fine surface optical quality. This paper describes the optimum all-SiC telescope trade for a SiC primary mirror with a predesigned lightweight configuration on the back and a metering structure. A trade study involves the utilization of finite element structural analysis in evaluating thermal as well as static and dynamic loadings. The paper presented herein describes the trade studies involved in the optimum design of lightweighting cell patterns, selection of mounting method, facesheet/rib thickness and mass for a primary mirror as well as selection of supporting method, for a metering structure with respect to static deflections, dynamic characteristics and thermal aspects.

Citation Download Citation

Haeng-Bok Lee, Jin-Young Suk, and Jong-In Bae "Trade study of all-SiC lightweight primary mirror and metering structures for spaceborne telescopes", Proc. SPIE 9574, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems II, 95740D (3 September 2015); https://doi.org/10.1117/12.2188826

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