R
Roberto Ragazzoni
Researcher at INAF
Publications - 471
Citations - 10303
Roberto Ragazzoni is an academic researcher from INAF. The author has contributed to research in topics: Adaptive optics & Wavefront. The author has an hindex of 35, co-authored 420 publications receiving 8381 citations. Previous affiliations of Roberto Ragazzoni include Max Planck Society & University of Padua.
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A virtual coronagraphic test bench for SHARK-NIR, the second-generation high contrast imager for the Large Binocular Telescope
Daniele Vassallo,E. Carolo,Jacopo Farinato,Guido Agapito,Maria Bergomi,Alexis Carlotti,M. De Pascale,Valentina D'Orazi,Davide Greggio,Demetrio Magrin,Luca Marafatto,Dino Mesa,E. Pinna,Alfio Puglisi,Marco Stangalini,Christophe Verinaud,Valentina Viotto,Federico Biondi,Simonetta Chinellato,Marco Dima,Simone Esposito,Fernando Pedichini,Elisa Portaluri,Roberto Ragazzoni +23 more
TL;DR: In this article, a simulator for the conceptual study of an AO-fed high-contrast coronagraphic imager is presented, where a complex disturbance (the electric field) is propagated through any user-defined optical train, in an end-to-end fashion.
Proceedings ArticleDOI
Multiple resolution (and field of view) adaptive optics: for ELTs only
Adriano Ghedina,Roberto Ragazzoni,Enrico Marchetti,Emiliano Diolaiti,Massimo Cecconi,Jacopo Farinato +5 more
TL;DR: In this paper, a multiple resolution, multiple Field of View (MOV) version of the layer oriented adaptive optics approach is proposed, where a larger field, allowing for the collection of more photons from natural stars, is used to sample the layer with a finer spatial detail, and viceversa.
Proceedings ArticleDOI
GMCAO simulation tool development.
Valentina Viotto,Elisa Portaluri,Roberto Ragazzoni,Carmelo Arcidiacono,Maria Bergomi,Marco Dima,Jacopo Farinato,Davide Greggio,Demetrio Magrin +8 more
TL;DR: In this article, the authors developed a simulator which numerically combines the measurements of a given number of wavefront sensors, each dedicated to one reference star, to optimize the performance in the NGSs directions.
Proceedings ArticleDOI
Multiple spatial frequencies wavefront sensing
Roberto Ragazzoni,Daniele Vassallo,Marco Dima,Elisa Portaluri,Maria Bergomi,Davide Greggio,Valentina Viotto,Federico Biondi,Elena Carolo,Simonetta Chinellato,Jacopo Farinato,Demetrio Magrin,Luca Marafatto +12 more
TL;DR: In this article, the concept of splitting spatial frequency perturbations into some kind of pupil planes wavefront sensors was introduced and the relationship useful to determine if, by which extent, and under what kind of merit function, these devices can overperform existing conventional sensors.
Proceedings ArticleDOI
The AIV concept of SHARK-NIR, a new coronagraph for the Large Binocular Telescope
Luca Marafatto,Maria Bergomi,Federico Biondi,Elena Carolo,Simonetta Chinellato,Marco De Pascale,Marco Dima,Jacopo Farinato,Davide Greggio,Luigi Lessio,Demetrio Magrin,Elisa Portaluri,Roberto Ragazzoni,Daniele Vassallo,Valentina Viotto +14 more
TL;DR: An overview of the opto-mechanical layout of SHARK-NIR and of the identified alignment procedure, mostly optical, planned to take place in 2018 are given.