9 August 2016 Opto-mechanical design of the G-CLEF flexure control camera system
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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.
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Jae Sok Oh, Jae Sok Oh, Chan Park, Chan Park, Jihun Kim, Jihun Kim, Kang-Min Kim, Kang-Min Kim, Moo-Young Chun, Moo-Young Chun, Young Sam Yu, Young Sam Yu, Sungho Lee, Sungho Lee, Jakyoung Nah, Jakyoung Nah, Sung-Joon Park, Sung-Joon Park, Andrew Szentgyorgyi, Andrew Szentgyorgyi, Stuart McMuldroch, Stuart McMuldroch, Timothy Norton, Timothy Norton, William Podgorski, William Podgorski, Ian Evans, Ian Evans, Mark Mueller, Mark Mueller, Alan Uomoto, Alan Uomoto, Jeffrey Crane, Jeffrey Crane, Tyson Hare, Tyson Hare, } "Opto-mechanical design of the G-CLEF flexure control camera system", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99089M (9 August 2016); doi: 10.1117/12.2232147; https://doi.org/10.1117/12.2232147
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