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Proceedings Paper

High volume production trial of mirror segments for the Thirty Meter Telescope
Author(s): Tetsuji Oota; Mahito Negishi; Hirohiko Shinonaga; Akihiko Gomi; Yutaka Tanaka; Kotaro Akutsu; Itaru Otsuka; Shun Mochizuki; Masanori Iye; Takuya Yamashita
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Paper Abstract

The Thirty Meter Telescope is a next-generation optical/infrared telescope to be constructed on Mauna Kea, Hawaii toward the end of this decade, as an international project. Its 30 m primary mirror consists of 492 off-axis aspheric segmented mirrors. High volume production of hundreds of segments has started in 2013 based on the contract between National Astronomical Observatory of Japan and Canon Inc.. This paper describes the achievements of the high volume production trials. The Stressed Mirror Figuring technique which is established by Keck Telescope engineers is arranged and adopted. To measure the segment surface figure, a novel stitching algorithm is evaluated by experiment. The integration procedure is checked with prototype segment.

Paper Details

Date Published: 22 July 2014
PDF: 7 pages
Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91451J (22 July 2014); doi: 10.1117/12.2055591
Show Author Affiliations
Tetsuji Oota, Canon Inc. (Japan)
Mahito Negishi, Canon Inc. (Japan)
Hirohiko Shinonaga, Canon Inc. (Japan)
Akihiko Gomi, Canon Inc. (Japan)
Yutaka Tanaka, Canon Inc. (Japan)
Kotaro Akutsu, Canon Inc. (Japan)
Itaru Otsuka, Canon Inc. (Japan)
Shun Mochizuki, Canon Inc. (Japan)
Masanori Iye, National Astronomical Observatory of Japan (Japan)
Takuya Yamashita, National Astronomical Observatory of Japan (Japan)

Published in SPIE Proceedings Vol. 9145:
Ground-based and Airborne Telescopes V
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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