The G-CLEF spectrograph optical design

Gábor Furész, Harland Epps, Stuart Barnes, William Podgorski, Andrew Szentgyorgyi, Mark Mueller, Daniel Baldwin, Jacob Bean, Henry Bergner, Moo Young Chun, Jeffrey Crane, Janet Evans, Ian Evans, Jeff Foster, Thomas Gauron, Dani Guzman, Edward Hertz, Andres Jordán, Kang Min Kim, Kenneth McCrackenTimothy Norton, Mark Ordway, Chan Park, Sang Park, Dave Plummer, Alan Uomoto, In Soo Yuk

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

13 Scopus citations


The GMT-Consortium Large Earth Finder (G-CLEF) is a fiber fed, optical echelle spectrograph, which has been selected as a first light instrument for the Giant Magellan Telescope (GMT) currently under construction at the Las Campanas Observatory. We designed G-CLEF as a general-purpose echelle spectrograph with a precision radial velocity (PRV) capability goal of 0.1 m/s, which will enable it to detect/measure the mass of an Earth-sized planet orbiting a Solar-type star in its habitable zone. This goal imposes challenging requirements on all aspects of the instrument and some of those are best incorporated directly into the optical design process. In this paper we describe the preliminary optical design of the G-CLEF instrument and briefly describe some novel solutions we have introduced into the asymmetric white pupil echelle configuration.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy V
EditorsSuzanne K. Ramsay, Ian S. McLean, Hideki Takami
ISBN (Electronic)9780819496157
StatePublished - 2014
Externally publishedYes
EventGround-Based and Airborne Instrumentation for Astronomy V - Montreal, Canada
Duration: 22 Jun 201426 Jun 2014

Publication series

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


ConferenceGround-Based and Airborne Instrumentation for Astronomy V


  • Echelle spectrograph
  • G-CLEF
  • GMT
  • Mangin mirror
  • optical design
  • precision radial velocity
  • white pupil


Dive into the research topics of 'The G-CLEF spectrograph optical design'. Together they form a unique fingerprint.

Cite this