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Proceedings Paper

Opto-mechanical design of the G-CLEF flexure control camera system
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Paper Abstract

The GMT-Consortium Large Earth Finder (G-CLEF) is the very first light instrument of the Giant Magellan Telescope (GMT). The G-CLEF is a fiber feed, optical band echelle spectrograph that is capable of extremely precise radial velocity measurement. KASI (Korea Astronomy and Space Science Institute) is responsible for Flexure Control Camera (FCC) included in the G-CLEF Front End Assembly (GCFEA). The FCC is a kind of guide camera, which monitors the field images focused on a fiber mirror to control the flexure and the focus errors within the GCFEA. The FCC consists of five optical components: a collimator including triple lenses for producing a pupil, neutral density filters allowing us to use much brighter star as a target or a guide, a tent prism as a focus analyzer for measuring the focus offset at the fiber mirror, a reimaging camera with three pair of lenses for focusing the beam on a CCD focal plane, and a CCD detector for capturing the image on the fiber mirror. In this article, we present the optical and mechanical FCC designs which have been modified after the PDR in April 2015.

Paper Details

Date Published: 9 August 2016
PDF: 8 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99089M (9 August 2016); doi: 10.1117/12.2232147
Show Author Affiliations
Jae Sok Oh, Korea Astronomy and Space Science Institute (Korea, Republic of)
Chan Park, Korea Astronomy and Space Science Institute (Korea, Republic of)
Jihun Kim, Korea Astronomy and Space Science Institute (Korea, Republic of)
Kang-Min Kim, Korea Astronomy and Space Science Institute (Korea, Republic of)
Moo-Young Chun, Korea Astronomy and Space Science Institute (Korea, Republic of)
Young Sam Yu, Korea Astronomy and Space Science Institute (Korea, Republic of)
Sungho Lee, Korea Astronomy and Space Science Institute (Korea, Republic of)
Jakyoung Nah, Korea Astronomy and Space Science Institute (Korea, Republic of)
Sung-Joon Park, Korea Astronomy and Space Science Institute (Korea, Republic of)
Andrew Szentgyorgyi, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Stuart McMuldroch, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Timothy Norton, Harvard-Smithsonian Ctr. for Astrophysics (United States)
William Podgorski, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Ian Evans, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Mark Mueller, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Alan Uomoto, The Observatories of the Carnegie Institution for Science (United States)
Jeffrey Crane, The Observatories of the Carnegie Institution for Science (United States)
Tyson Hare, The Observatories of the Carnegie Institution for Science (United States)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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