Quality evaluation of spaceborne SiC mirrors (II): evaluation technology for mirror accuracy using actual measurement data of samples cut out from a mirror surface
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Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)
Space Applications Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Space Applications Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Space Applications Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Space Applications Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Nagoya University
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
出版者（英）
Optical Society of America
雑誌名
Applied Optics
巻
52
号
26
ページ
6458 - 6466
発行年
2013-09-10
抄録（英）
The authors studied the quality evaluation technology of a spaceborne large-scale lightweight mirror that was made of silicon carbide (SiC)-based material. To correlate the material property of a mirror body and the mirror accuracy, the authors evaluated the mirror surface deviation of a prototype mirror by inputting actually measured coefficient of thermal expansion (CTE) data into a finite element analysis model. The CTE data were obtained by thermodilatometry using a commercial grade thermal dilatometer for the samples cut from all over the mirror surface. The computationally simulated contour diagrams well reproduced the mirror accuracy profile that the actual mirror showed in cryogenic testing. Density data were also useful for evaluating the mirror surface deviation because they had a close relationship with the CTE.
Quality evaluation of spaceborne SiC mirrors (II): evaluation technology for mirror accuracy using actual measurement data of samples cut out from a mirror surface
PA1420011.pdf
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