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Proceedings Paper

Material characteristics of CLEARCERAM-Z HS for use in large diameter mirror blanks
Author(s): Takayuki Kishi; Naoyuki Goto; Brion Hoffman; Yasuyuki Kawashima; Kenji Suzuki; Kazuharu Yoshizawa; Kaito Suzuki
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Paper Abstract

There is growing interest within the Astronomical community in the development and use of very large aperture telescopes which will incorporate the latest advancements in optical materials. Two of the most notable of these large size telescope projects, the Thirty Meter Telescope (TMT) and European Extremely Large Telescope (E-ELT), will use mirror segments in the actively controlled primary mirrors. In this paper we present the results of a material characteristics study on Ohara CLEARCERAM®-Z HS large diameter blanks which includes data on the CTE, CTE uniformity, residual stress and internal quality targeting potential use in the TMT Primary Mirror Segment Banks.

Paper Details

Date Published: 19 July 2010
PDF: 11 pages
Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77390K (19 July 2010); doi: 10.1117/12.857774
Show Author Affiliations
Takayuki Kishi, Ohara Inc. (Japan)
Naoyuki Goto, Ohara Inc. (Japan)
Brion Hoffman, Ohara Corp. (United States)
Yasuyuki Kawashima, Ohara Inc. (Japan)
Kenji Suzuki, Ohara Inc. (Japan)
Kazuharu Yoshizawa, Ohara Inc. (Japan)
Kaito Suzuki, Ohara Inc. (Japan)

Published in SPIE Proceedings Vol. 7739:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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