Performance of lightweight large C/SiC mirror

Yukari Y. Yui; Ken Goto; Hidehiro Kaneda; Haruyoshi Katayama; Masaki Kotani; Masashi Miyamoto; Masataka Naitoh; Takao Nakagawa; Hideki Saruwatari; Masahiro Suganuma; Hiroyuki Sugita; Yoshio Tange; Shin Utsunomiya; Yasuji Yamamoto; Toshihiko Yamawaki

doi:10.1117/12.2308191

21 November 2017 Performance of lightweight large C/SiC mirror

Yukari Y. Yui, Ken Goto, Hidehiro Kaneda, Haruyoshi Katayama, Masaki Kotani, Masashi Miyamoto, Masataka Naitoh, Takao Nakagawa, Hideki Saruwatari, Masahiro Suganuma, Hiroyuki Sugita, Yoshio Tange, Shin Utsunomiya, Yasuji Yamamoto, Toshihiko Yamawaki

Author Affiliations +

Proceedings Volume 10566, International Conference on Space Optics — ICSO 2008; 105660M (2017) https://doi.org/10.1117/12.2308191
Event: International Conference on Space Optics 2008, 2008, Toulouse, France

Abstract

Very lightweight mirror will be required in the near future for both astronomical and earth science/observation missions. Silicon carbide is becoming one of the major materials applied especially to large and/or light space-borne optics, such as Herschel, GAIA, and SPICA. On the other hand, the technology of highly accurate optical measurement of large telescopes, especially in visible wavelength or cryogenic circumstances is also indispensable to realize such space-borne telescopes and hence the successful missions.

We have manufactured a very lightweight Φ=800mm mirror made of carbon reinforced silicon carbide composite that can be used to evaluate the homogeneity of the mirror substrate and to master and establish the ground testing method and techniques by assembling it as the primary mirror into an optical system. All other parts of the optics model are also made of the same material as the primary mirror.

The composite material was assumed to be homogeneous from the mechanical tests of samples cut out from the various areas of the 800mm mirror green-body and the cryogenic optical measurement of the mirror surface deformation of a 160mm sample mirror that is also made from the same green-body as the 800mm mirror.

The circumstance and condition of the optical testing facility has been confirmed to be capable for the highly precise optical measurements of large optical systems of horizontal light axis configuration. Stitching measurement method and the algorithm for analysis of the measurement is also under study.

Citation Download Citation

Yukari Y. Yui, Ken Goto, Hidehiro Kaneda, Haruyoshi Katayama, Masaki Kotani, Masashi Miyamoto, Masataka Naitoh, Takao Nakagawa, Hideki Saruwatari, Masahiro Suganuma, Hiroyuki Sugita, Yoshio Tange, Shin Utsunomiya, Yasuji Yamamoto, and Toshihiko Yamawaki "Performance of lightweight large C/SiC mirror", Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 105660M (21 November 2017); https://doi.org/10.1117/12.2308191

ACCESS THE FULL ARTICLE

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY