High volume production trial of mirror segments for the Thirty Meter Telescope

Tetsuji Oota; Mahito Negishi; Hirohiko Shinonaga; Akihiko Gomi; Yutaka Tanaka; Kotaro Akutsu; Itaru Otsuka; Shun Mochizuki; Masanori Iye; Takuya Yamashita

doi:10.1117/12.2055591

22 July 2014 High volume production trial of mirror segments for the Thirty Meter Telescope

Tetsuji Oota, Mahito Negishi, Hirohiko Shinonaga, Akihiko Gomi, Yutaka Tanaka, Kotaro Akutsu, Itaru Otsuka, Shun Mochizuki, Masanori Iye, Takuya Yamashita

Author Affiliations +

Proceedings Volume 9145, Ground-based and Airborne Telescopes V; 91451J (2014) https://doi.org/10.1117/12.2055591
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

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.

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Tetsuji Oota, Mahito Negishi, Hirohiko Shinonaga, Akihiko Gomi, Yutaka Tanaka, Kotaro Akutsu, Itaru Otsuka, Shun Mochizuki, Masanori Iye, and Takuya Yamashita "High volume production trial of mirror segments for the Thirty Meter Telescope", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91451J (22 July 2014); https://doi.org/10.1117/12.2055591

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