PARIANI, GiorgioGiorgioPARIANIBRIGUGLIO PELLEGRINO, RUNA ANTONIORUNA ANTONIOBRIGUGLIO PELLEGRINOXOMPERO, MARCOMARCOXOMPERORIVA, MarcoMarcoRIVAZERBI, Filippo MariaFilippo MariaZERBIRICCARDI, ArmandoArmandoRICCARDITintori, M.M.TintoriGallieni, D.D.GallieniAndrighettoni, M.M.AndrighettoniBiasi, R.R.Biasi2020-05-182020-05-1820150037-8720http://hdl.handle.net/20.500.12386/24935The design of the interferometric test of the adaptive M4 Unit of E-ELT, a deformable six petals 2.4 m mirror, will be described. The actual baseline follows a macro-stitching approach, where each segment is separately flattened and co-phased to the other petals. The optical test setup for the single shell consists in a Newtonian system, with a 1.5 m parabolic mirror as main collimator. A 0.6 m reference flat mirror is foreseen to verify the alignment of the interferometric cavity. A Demonstration Prototype of the final M4 Unit, a 222 actuators, two shells deformable mirror, has been produced by Microgate and A.D.S. International. Results of the optical measurement campaign performed in INAF on the prototype mirror are reported.STAMPAenArticlehttp://sait.oats.inaf.it/MSAIt860315/index.html2015MmSAI..86..416PFIS/05 - ASTRONOMIA E ASTROFISICA