Development of the fast steering secondary mirror assembly of GMT

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 GardnerLee Dettmann, Wylie Rosenthal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

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.

Original languageEnglish (US)
Title of host publicationAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
EditorsRamon Navarro, James H. Burge
PublisherSPIE
ISBN (Electronic)9781510602038
DOIs
StatePublished - Jan 1 2016
EventAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation II - Edinburgh, United Kingdom
Duration: Jun 26 2016Jul 1 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9912
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
CountryUnited Kingdom
CityEdinburgh
Period6/26/167/1/16

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Keywords

  • Extremely large telescope
  • Fast Steering Secondary Mirror
  • Giant Magellan Telescope
  • Mirror support, tip-tilt, image quality
  • Optics
  • Optomechanics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Lee, S., Cho, M. K., Park, C., Han, J. Y., Jeong, U., Yoon, Y. N., Song, J. H., Park, B. G., Dribusch, C., Park, W. H., Jun, Y., Yang, H. S., Moon, I. K., Oh, C. J., Kim, H. S., Lee, K. D., Bernier, R., Alongi, C., Rakich, A., ... Rosenthal, W. (2016). Development of the fast steering secondary mirror assembly of GMT. In R. Navarro, & J. H. Burge (Eds.), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II [991241] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9912). SPIE. https://doi.org/10.1117/12.2233710