RAGAZZONI, RobertoRobertoRAGAZZONIDIOLAITI, EMILIANOEMILIANODIOLAITIFARINATO, JACOPOJACOPOFARINATOViard, EliseEliseViardARCIDIACONO, CARMELOCARMELOARCIDIACONOBARUFFOLO, AndreaAndreaBARUFFOLO2023-02-222023-02-222002http://hdl.handle.net/20.500.12386/33753The ESO Multi-Conjugate Adaptive Optics Demonstrator (MAD) has been identified as an essential component to demonstrate on sky MCAO techniques, both for the OWL 100-m telescope concept and for the ESO VLT 2nd Generation instrumentation. MAD is intended to be a Multi-Conjugate Adaptive Optics prototype to be tested at VLT Visitor Focus (UT3). It is conceived as a fast track project by re-using as much as possible key components developed in the scope of existing VLT AO systems. The scope of this document is to provide the conceptual design for the layer-oriented wave front sensor.ELETTRONICOenResearch reportFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering