The opto-mechanical design of HARMONI: a first light integral field spectrograph for the E-ELT

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

doi:10.1117/12.926011

24 September 2012 The opto-mechanical design of HARMONI: a first light integral field spectrograph for the E-ELT

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

Author Affiliations +

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84461L (2012) https://doi.org/10.1117/12.926011
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

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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, and Hermine Schnetler "The opto-mechanical design of HARMONI: a first light integral field spectrograph for the E-ELT", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84461L (24 September 2012); https://doi.org/10.1117/12.926011

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KEYWORDS

Sensors

Spectrographs

Telescopes

Visible radiation

Calibration

Mirrors

Adaptive optics

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