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12 July 2018 The optical design of the G-CLEF Spectrograph: the first light instrument for the GMT
Sagi Ben-Ami, Jeffrey D. Crane, Ian Evans, Stuart McMuldroch, Mark Mueller, William Podgorski, Andrew Szentgyorgyi
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Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107029K (2018) https://doi.org/10.1117/12.2313381
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States
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.
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Sagi Ben-Ami, Jeffrey D. Crane, Ian Evans, Stuart McMuldroch, Mark Mueller, William Podgorski, and Andrew Szentgyorgyi "The optical design of the G-CLEF Spectrograph: the first light instrument for the GMT", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107029K (12 July 2018); https://doi.org/10.1117/12.2313381
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KEYWORDS
Spectrographs
Optical design
Cameras
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