Time-dependent deformation of surface geometry on light weight and thermally stable CFRP mirror in humid environment

Details Time-dependent deformation of surface geometry on light weight and thermally stable CFRP mirror in humid environment Time-dependent deformation of surface geometry on light weight and thermally stable CFRP mirror in humid environment

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7739e..85a&link_type=abstract

Modern Technologies in Space- and Ground-based Telescopes and Instrumentation. Edited by Atad-Ettedgui, Eli; Lemke, Dietrich.

Physics

Scientific paper

CFRP (Carbon Fiber Reinforced Plastics) is the ideal material for space based mirror due to its low thermal expansion, and high specific modulus. To expand the use of CFRP, we investigated the long-term stability of CFRP under humid environment. CFRP mirror was made as precise as possible by using special class of material and adopting particular design techniques. Dimensional stability of CFRP mirror was evaluated by nano-scale measurement. The factors which cause out-of-plane deformation of the mirror is discussed.

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