Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Microscopic surface structure of C∕SiC composite mirrors for space cryogenic telescopes

Not Accessible

Your library or personal account may give you access

Abstract

We report on the microscopic surface structure of carbon-fiber-reinforced silicon carbide (C∕SiC) composite mirrors that have been improved for the Space Infrared Telescope for Cosmology and Astrophysics (SPICA) and other cooled telescopes. The C∕SiC composite consists of carbon fiber, silicon carbide, and residual silicon. Specific microscopic structures are found on the surface of the bare C∕SiC mirrors after polishing. These structures are considered to be caused by the different hardness of those materials. The roughness obtained for the bare mirrors is 20  nm rms for flat surfaces and 100 nm rms for curved surfaces. It was confirmed that a SiSiC slurry coating is effective in reducing the roughness to 2 nm rms. The scattering properties of the mirrors were measured at room temperature and also at 95 K. No significant change was found in the scattering properties through cooling, which suggests that the microscopic surface structure is stable with changes in temperature down to cryogenic values. The C∕SiC mirror with the SiSiC slurry coating is a promising candidate for the SPICA telescope.

© 2007 Optical Society of America

Full Article  |  PDF Article
More Like This
Cryogenic optical testing of an 800mm lightweight C/SiC composite mirror mounted on a C/SiC optical bench

Hidehiro Kaneda, Masataka Naitoh, Tadashi Imai, Yoshio Tange, Keigo Enya, Haruyoshi Katayama, Kenta Maruyama, Takao Nakagawa, Takashi Onaka, Masahiro Suganuma, Ryoko Kano, Yuichi Kiriyama, Tatsuya Mori, and Ai Takahashi
Appl. Opt. 49(20) 3941-3948 (2010)

Cryogenic optical measurements of 12-segment-bonded carbon-fiber-reinforced silicon carbide composite mirror with support mechanism

Hidehiro Kaneda, Takao Nakagawa, Takashi Onaka, Keigo Enya, Sin'itirou Makiuti, Junji Takaki, Masaki Haruna, Masami Kume, and Tsuyoshi Ozaki
Appl. Opt. 47(8) 1122-1128 (2008)

Cryogenic optical performance of the ASTRO-F SiC telescope

Hidehiro Kaneda, Takashi Onaka, Takao Nakagawa, Keigo Enya, Hiroshi Murakami, Ryoji Yamashiro, Tatsuhiko Ezaki, Yasuyuki Numao, and Yoshikazu Sugiyama
Appl. Opt. 44(32) 6823-6832 (2005)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved