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Proceedings Paper

The opto-mechanical design of HARMONI: a first light integral field spectrograph for the E-ELT
Author(s): Niranjan A. Thatte; Mathias Tecza; David Freeman; Angus M. Gallie; David Montgomery; Fraser Clarke; Ana Belén Fragoso-Lopez; Javier Fuentes; Fernando Gago; Adolfo Garcia; Felix Gracia; Johan Kosmalski; James Lynn; Dario Sosa; Santiago Arribas; Roland Bacon; Roger L Davies; Thierry Fusco; David Lunney; Evencio Mediavilla; Alban Remillieux; Hermine Schnetler
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Paper Abstract

HARMONI is a visible and near-IR integral field spectrograph, providing the E-ELT's spectroscopic capability at first light. It obtains simultaneous spectra of 32000 spaxels, at a range of resolving powers from R~4000 to R~20000, covering the wavelength range from 0.47 to 2.45 μm. The 256 × 128 spaxel field of view has four different plate scales, with the coarsest scale (40 mas) providing a 5″ × 10″ FoV, while the finest scale is a factor of 10 finer (4mas). We describe the opto-mechanical design of HARMONI, prior to the start of preliminary design, including the main subsystems - namely the image de-rotator, the scale-changing optics, the splitting and slicing optics, and the spectrographs. We also present the secondary guiding system, the pupil imaging optics, the field and pupil stops, the natural guide star wavefront sensor, and the calibration unit.

Paper Details

Date Published: 24 September 2012
PDF: 10 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84461L (24 September 2012); doi: 10.1117/12.926011
Show Author Affiliations
Niranjan A. Thatte, Univ. of Oxford (United Kingdom)
Mathias Tecza, Univ. of Oxford (United Kingdom)
David Freeman, Kidger Optics Associates (United Kingdom)
Angus M. Gallie, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
David Montgomery, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
Fraser Clarke, Univ. of Oxford (United Kingdom)
Ana Belén Fragoso-Lopez, Instituto de Astrofísica de Canarias (Spain)
Javier Fuentes, Instituto de Astrofísica de Canarias (Spain)
Fernando Gago, European Southern Observatory (Germany)
Adolfo Garcia, SENER Ingenieria y Systemas (Spain)
Felix Gracia, Instituto de Astrofísica de Canarias (Spain)
Johan Kosmalski, Observatoire de Lyon (France)
James Lynn, Univ. of Oxford (United Kingdom)
Dario Sosa, Instituto de Astrofísica de Canarias (Spain)
Santiago Arribas, Consejo Superior de Investigaciones Científicas (Spain)
Roland Bacon, Observatoire de Lyon (France)
Roger L Davies, Univ. of Oxford (United Kingdom)
Thierry Fusco, ONERA (France)
David Lunney, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
Evencio Mediavilla, Instituto de Astrofísica de Canarias (Spain)
Alban Remillieux, Ctr. Recherche Astrophysique de Lyon, Observatoire de Lyon (France)
Hermine Schnetler, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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