Material characteristics of CLEARCERAM-Z HS for use in large diameter mirror blanks

Takayuki Kishi; Naoyuki Goto; Brion Hoffman; Yasuyuki Kawashima; Kenji Suzuki; Kazuharu Yoshizawa; Kaito Suzuki

doi:10.1117/12.857774

19 July 2010 Material characteristics of CLEARCERAM-Z HS for use in large diameter mirror blanks

Takayuki Kishi, Naoyuki Goto, Brion Hoffman, Yasuyuki Kawashima, Kenji Suzuki, Kazuharu Yoshizawa, Kaito Suzuki

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77390K (2010) https://doi.org/10.1117/12.857774
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

Takayuki Kishi, Naoyuki Goto, Brion Hoffman, Yasuyuki Kawashima, Kenji Suzuki, Kazuharu Yoshizawa, and Kaito Suzuki "Material characteristics of CLEARCERAM-Z HS for use in large diameter mirror blanks", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77390K (19 July 2010); https://doi.org/10.1117/12.857774

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