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Proceedings Paper

New design approaches for a very high resolution spectrograph for the combined focus of the VLT
Author(s): Paolo Spanò; Bernard Delabre; Hans Dekker; Gerardo Avila
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Paper Abstract

To achieve very-high spectral resolutions (R>100,000) with large telescopes (D>8m) new optical solutions have been investigated in the context of the ESPRESSO project for the VLT, starting from the initial design of CODEX for the E-ELT. ESPRESSO is a high-efficiency, high-stability, high-resolution visible spectrograph for the combined Coude focus of the VLT. Among these new solutions, we can mention: free-form optics, used to design an all-mirror anamorphic pupil slicer, large mosaic echelle grating, slanted VPH gratings, super-corrected atmospheric dispersion corrector. All these solutions have been usefully applied to design the spectrograph for ESPRESSO, and its Coude relay system.

Paper Details

Date Published: 9 July 2008
PDF: 9 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70140M (9 July 2008); doi: 10.1117/12.789283
Show Author Affiliations
Paolo Spanò, INAF - Osservatorio Astronomico di Brera (Italy)
Bernard Delabre, European Southern Observatory (Germany)
Hans Dekker, European Southern Observatory (Germany)
Gerardo Avila, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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