Development of the fast steering secondary mirror assembly of GMT

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Author
Lee, Sungho
Cho, Myung K.
Park, Chan
Han, Jeong-Yeol
Jeong, Ueejeong
Yoon, Yang-noh
Song, Je Heon
Park, Byeong-Gon
Dribusch, Christoph
Park, Won Hyun
Affiliation
Univ Arizona
Issue Date
2016-07-22
Keywords
extremely large telescope
Giant Magellan Telescope
Fast Steering Secondary Mirror
optics
optomechanics
mirror support
tip-tilt
image quality

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Publisher
SPIE-INT SOC OPTICAL ENGINEERING
Citation
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 and Wylie Rosenthal " Development of the fast steering secondary mirror assembly of GMT ", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991241 (July 22, 2016); doi:10.1117/12.2233710; http://dx.doi.org/10.1117/12.2233710
Journal
ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION II
Rights
© 2016 SPIE.
Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
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 subapertures 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.
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ISSN
0277-786X
DOI
10.1117/12.2233710
Version
Final published version
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http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2233710
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