24 September 2012 Very high-resolution spectroscopy: the ESPRESSO optical design
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Abstract
Resolving power of spectrographs for large telescopes is generally limited by the maximum dimension of the dispersion gratings. To overcome this limit, innovative optical configurations have been designed, starting from the ideas proposed for CODEX. By properly combining pupil slicing and anamorphic magnification, a R~63’000-210’000 spectrograph has been designed. Many different solutions were proposed during the early design phases, and a detailed trade off study has been carried out to improve efficiency, manufacturability, and reduce risks and costs of the preliminary designs. We present a full description of the optical design of the spectrograph after preliminary design review, together with expected performances.
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P. Spanò, P. Spanò, B. Delabre, B. Delabre, H. Dekker, H. Dekker, F. Pepe, F. Pepe, F. M. Zerbi, F. M. Zerbi, P. Di Marcantonio, P. Di Marcantonio, S. Cristiani, S. Cristiani, D. Mégevand, D. Mégevand, } "Very high-resolution spectroscopy: the ESPRESSO optical design", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84467V (24 September 2012); doi: 10.1117/12.925947; https://doi.org/10.1117/12.925947
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