LI CAUSI, GianlucaGianlucaLI CAUSISTANGALINI, MARCOMARCOSTANGALINIANTONIUCCI, SimoneSimoneANTONIUCCIPEDICHINI, FernandoFernandoPEDICHINIMATTIOLI, MassimilianoMassimilianoMATTIOLITESTA, VincenzoVincenzoTESTAPIAZZESI, ROBERTOROBERTOPIAZZESI2020-11-062020-11-062018978151061959397815106196090277-786Xhttp://hdl.handle.net/20.500.12386/28191We present the research and developement status of the Speckle-Free Angular Differential Imaging method (SFADI), that we developed for the SHARK-VIS high-contrast imager for the LBT telescope. The technique bases on the acquisition of kHz frame-rate image sequences, which we combine in post-processing after speckle identification and suppression in each frame. With respect to the standard angular differential imaging, this method reaches a much smoother residual background and hence higher detection contrast at a given signal-to-noise ratio. Furthermore, it can reveal faint extended sources around bright central stars, and can use de-rotated images as well as quick second-lasting sequences. We reached a contrast of around 1e-5 for integration times of the order of tens of minutes at 100 mas for a 5.7 magnitude star, as we demonstrated on both a real-sky acquisition and at the SHARK-VIS laboratory test bench. Such long sequences though produces a large amount of data (around a million frames every 15 minutes) that we manage to processed in a reasonable computation time with the described implementation scheme.ELETTRONICOenConference paper10.1117/12.23126142-s2.0-850526600290004528193000902018SPIE10703E..2ULFIS/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