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Proceedings Paper

Development of the fast steering secondary mirror assembly of GMT
Author(s): Sungho Lee; Myung K. Cho; Chan Park; Jeong-Yeol Han; Ueejeong Jeong; Yang-noh Yoon; Je Heon Song; Byeong-Gon Park; Christoph Dribusch; Won Hyun Park; Youra Jun; Ho-Soon Yang; Il-Kwon Moon; Chang Jin Oh; Ho-Sang Kim; Kyoung-Don Lee; Robert Bernier; Chris Alongi; Andrew Rakich; Paul Gardner; Lee Dettmann; Wylie Rosenthal
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Paper Abstract

The Giant Magellan Telescope (GMT) will be featured with two Gregorian secondary mirrors, an adaptive secondary mirror (ASM) and a fast-steering secondary mirror (FSM). The FSM has an effective diameter of 3.2 m and built as seven 1.1 m diameter circular segments, which are conjugated 1:1 to the seven 8.4m segments of the primary. Each FSM segment contains a tip-tilt capability for fine co-alignment of the telescope sub-apertures and fast guiding to attenuate telescope wind shake and mount control jitter. This tip-tilt capability thus enhances performance of the telescope in the seeing limited observation mode. As the first stage of the FSM development, Phase 0 study was conducted to develop a program plan detailing the design and manufacturing process for the seven FSM segments. The FSM development plan has been matured through an internal review by the GMTO-KASI team in May 2016 and fully assessed by an external review in June 2016. In this paper, we present the technical aspects of the FSM development plan.

Paper Details

Date Published: 22 July 2016
PDF: 15 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991241 (22 July 2016); doi: 10.1117/12.2233710
Show Author Affiliations
Sungho Lee, Korea Astronomy and Space Science Institute (Korea, Republic of)
Myung K. Cho, National Optical Astronomy Observatory (United States)
Chan Park, Korea Astronomy and Space Science Institute (Korea, Republic of)
Jeong-Yeol Han, Korea Astronomy and Space Science Institute (Korea, Republic of)
Ueejeong Jeong, Korea Astronomy and Space Science Institute (Korea, Republic of)
Yang-noh Yoon, Korea Astronomy and Space Science Institute (Korea, Republic of)
Je Heon Song, Korea Astronomy and Space Science Institute (Korea, Republic of)
Byeong-Gon Park, Korea Astronomy and Space Science Institute (Korea, Republic of)
Christoph Dribusch, The Univ. of Arizona (United States)
Won Hyun Park, The Univ. of Arizona (United States)
Youra Jun, The Univ. of Arizona (United States)
Ho-Soon Yang, Korea Research Institute of Standards and Science (Korea, Republic of)
Il-Kwon Moon, Korea Research Institute of Standards and Science (Korea, Republic of)
Chang Jin Oh, The Univ. of Arizona (United States)
Ho-Sang Kim, Institute for Advanced Engineering (Korea, Republic of)
Kyoung-Don Lee, Institute for Advanced Engineering (Korea, Republic of)
Robert Bernier, GMTO Corp. (United States)
Chris Alongi, GMTO Corp. (United States)
Andrew Rakich, GMTO Corp. (United States)
Paul Gardner, GMTO Corp. (United States)
Lee Dettmann, GMTO Corp. (United States)
Wylie Rosenthal, GMTO Corp. (United States)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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