RICCARDI, ArmandoArmandoRICCARDIESPOSITO, SimoneSimoneESPOSITOAGAPITO, GUIDOGUIDOAGAPITOAntichi, J.J.AntichiBILIOTTI, ValdemaroValdemaroBILIOTTIBlain, C.C.BlainBRIGUGLIO PELLEGRINO, RUNA ANTONIORUNA ANTONIOBRIGUGLIO PELLEGRINOBUSONI, LORENZOLORENZOBUSONICARBONARO, LUCALUCACARBONARODI RICO, GianlucaGianlucaDI RICOGiordano, C.C.GiordanoPINNA, EnricoEnricoPINNAPUGLISI, Alfio TimothyAlfio TimothyPUGLISISpanò, P.P.SpanòXOMPERO, MARCOMARCOXOMPEROBARUFFOLO, AndreaAndreaBARUFFOLOKasper, M.M.KasperEgner, S.S.EgnerSuàrez Valles, M.M.Suàrez VallesSoenke, C.C.SoenkeDowning, M.M.DowningReyes, J.J.Reyes2020-07-222020-07-22201697815106019700277-786Xhttp://hdl.handle.net/20.500.12386/26568ERIS is the new AO instrument for VLT-UT4 led by a Consortium of Max-Planck Institut fuer Extraterrestrische Physik, UK-ATC, ETH-Zurich, ESO and INAF. The ERIS AO system provides NGS mode to deliver high contrast correction and LGS mode to extend high Strehl performance to large sky coverage. The AO module includes NGS and LGS wavefront sensors and, with VLT-AOF Deformable Secondary Mirror and Laser Facility, will provide AO correction to the high resolution imager NIX (1-5um) and the IFU spectrograph SPIFFIER (1-2.5um). In this paper we present the preliminary design of the ERIS AO system and the estimated correction performance.STAMPAenConference paper10.1117/12.22340012-s2.0-85002377918000387429700040http://arxiv.org/abs/1607.06949v1https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9909/1/The-ERIS-adaptive-optics-system/10.1117/12.2234001.short2016SPIE.9909E..1BRFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_17 Instrumentation – telescopes, detectors and techniques