Optical design of the ESPRESSO spectrograph at VLT
| Autor: | Nuno C. Santos, C. Lovis, Rafael Rebolo, Denis Mégevand, P. Di Marcantonio, A. Cabral, Francesco Pepe, Filippo Maria Zerbi, Stefano Cristiani, J. M. Herreros, Paolo Spanò |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
business.industry Detector Astrophysics::Instrumentation and Methods for Astrophysics 01 natural sciences Exoplanet 010309 optics Radial velocity Espresso Optics 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Spectral resolution business Focus (optics) 010303 astronomy & astrophysics Spectrograph Echelle grating Remote sensing |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| Popis: | ESPRESSO, a very high-resolution, high-efficiency, ultra-high stability, fiber-fed, cross-dispersed echelle spectrograph located in the Combined-Coude focus of the VLT, has been designed to detect exo-planets with unprecedented radial velocity accuracies of 10 cm/sec over 20 years period. To increase spectral resolution, an innovative pupil slicing technique has been adopted, based onto free-form optics. Anamorphism has been added to increase resolution while keeping the physical size of the echelle grating within reasonable limits. Anamorphic VPH grisms will help to decrease detector size, while maximizing efficiency and inter-order separation. Here we present a summary of the optical design of the spectrograph and of expected performances. |
| Databáze: | OpenAIRE |
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