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

Yoshihiko Arao; Jun Koyanagi; Shin Utsunomiya; Shin-ichi Takeda; Hiroyuki Kawada

doi:10.1117/12.856910

22 July 2010 Time-dependent deformation of surface geometry on light weight and thermally stable CFRP mirror in humid environment

Yoshihiko Arao, Jun Koyanagi, Shin Utsunomiya, Shin-ichi Takeda, Hiroyuki Kawada

Author Affiliations +

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77392N (2010) https://doi.org/10.1117/12.856910
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

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.

Citation Download Citation

Yoshihiko Arao, Jun Koyanagi, Shin Utsunomiya, Shin-ichi Takeda, and Hiroyuki Kawada "Time-dependent deformation of surface geometry on light weight and thermally stable CFRP mirror in humid environment", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77392N (22 July 2010); https://doi.org/10.1117/12.856910

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