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The optical design of the G-CLEF Spectrograph: the first light instrument for the GMT
Author(s): Sagi Ben-Ami; Jeffrey D. Crane; Ian Evans; Stuart McMuldroch; Mark Mueller; William Podgorski; Andrew Szentgyorgyi
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Paper Abstract

The GMT-Consortium Large Earth Finder (G-CLEF), one of the first light instruments for the Giant Magellan Telescope (GMT), is a fiber-fed, high-resolution echelle spectrograph. G-CLEF is expected to proceed towards fabrication in the coming months. In this paper, we present the current, pre-construction G-CLEF optical design, with an emphasis on the innovative features derived for the spectrograph fiber-feed, the implementation of a volume-phase holographic (VPH)- based cross disperser with enhanced blue throughput and our novel solutions for a multi-colored exposure meter and a flat-fielding system.

Paper Details

Date Published: 12 July 2018
PDF: 11 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107029K (12 July 2018); doi: 10.1117/12.2313381
Show Author Affiliations
Sagi Ben-Ami, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Jeffrey D. Crane, Lick Observatory, Univ. of California, Santa Cruz (United States)
Ian Evans, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Stuart McMuldroch, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Mark Mueller, Harvard-Smithsonian Ctr. for Astrophysics (United States)
William Podgorski, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Andrew Szentgyorgyi, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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