Journal of Solid Mechanics and Materials Engineering
Online ISSN : 1880-9871
ISSN-L : 1880-9871
Papers(Special Issue)
High Accurate Space Telescope Mirror Made by Light and Thermally Stable CFRP
Jun KOYANAGIYoshihiko ARAOShin UTSUNOMIYAShin-ichi TAKEDAHiroyuki KAWADA
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2010 Volume 4 Issue 11 Pages 1540-1549

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Abstract

This paper reports a development of space telescope mirror made by light and thermally stable CFRP. We first compare thermal stabilities of a mirror made by CFRP with a conventional that made by glass material. The superior point regarding the thermal stability of the CFRP mirror to the glass mirror is described. One of the most critical issues for CFRP mirror is the mirror-surface roughness deterioration induced by "fiber-print through". We made a prototype mirror consisting of only CFRP with a gel-coating on the mirror surface, addressing the issue. The gel-coated mirror-surface roughness was 20 nmRMS just after fabrication. Durability of the surface roughness under various hostile conditions is examined in the present study.

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© 2010 by The Japan Society of Mechanical Engineers
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