The ERIS Adaptive Optics System

摘要

ERIS is the new AO instrument for VLT-UT4 led by a Consortium of Max-PlanckInstitut fuer Extraterrestrische Physik, UK-ATC, ETH-Zurich, ESO and INAF. TheERIS AO system provides NGS mode to deliver high contrast correction and LGSmode to extend high Strehl performance to large sky coverage. The AO moduleincludes NGS and LGS wavefront sensors and, with VLT-AOF Deformable SecondaryMirror and Laser Facility, will provide AO correction to the high resolutionimager NIX (1-5um) and the IFU spectrograph SPIFFIER (1-2.5um). In this paperwe present the preliminary design of the ERIS AO system and the estimatedcorrection performance.