24 September 2012 The opto-mechanical design of HARMONI: a first light integral field spectrograph for the E-ELT
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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, Niranjan A. Thatte, Mathias Tecza, Mathias Tecza, David Freeman, David Freeman, Angus M. Gallie, Angus M. Gallie, David Montgomery, David Montgomery, Fraser Clarke, Fraser Clarke, Ana Belén Fragoso-Lopez, Ana Belén Fragoso-Lopez, Javier Fuentes, Javier Fuentes, Fernando Gago, Fernando Gago, Adolfo Garcia, Adolfo Garcia, Felix Gracia, Felix Gracia, Johan Kosmalski, Johan Kosmalski, James Lynn, James Lynn, Dario Sosa, Dario Sosa, Santiago Arribas, Santiago Arribas, Roland Bacon, Roland Bacon, Roger L Davies, Roger L Davies, Thierry Fusco, Thierry Fusco, David Lunney, David Lunney, Evencio Mediavilla, Evencio Mediavilla, Alban Remillieux, Alban Remillieux, Hermine Schnetler, 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); doi: 10.1117/12.926011; https://doi.org/10.1117/12.926011
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