Alignment using the LT in the MORFEO at ELT instrumentation

Redaelli, Edoardo Maria AlbertoEdoardo Maria AlbertoRedaelli0000-0003-1580-6966Aliverti, MatteoMatteoAliverti0000-0003-3260-4389Riva, MarcoMarcoRivaPariani, GiorgioGiorgioPariani0000-0002-2074-0458De Caprio, VincenzoVincenzoDe Caprio0000-0002-0447-4620Cianniello, VincenzoVincenzoCianniello0000-0003-3724-7667Eredia, ChristianChristianEredia0000-0003-1111-3628Cascone, EnricoEnricoCascone0000-0003-3925-2427Di Antonio, IvanIvanDi Antonio0000-0003-0312-313XDi Rico, GianlucaGianlucaDi Rico0000-0001-8014-2233Dolci, MauroMauroDolci0000-0001-8000-5642Rodeghiero, GabrieleGabrieleRodeghiero0000-0002-3469-9863Magrin, DemetrioDemetrioMagrin0000-0002-5840-8362Busoni, LorenzoLorenzoBusoni0000-0001-8185-2122Foppiani, ItaloItaloFoppiani0000-0002-2525-3202Farinato, JacopoJacopoFarinato0000-0002-7425-7517Ciliegi, PaoloPaoloCiliegi0000-0002-5213-8269Di Rocco, AndreaAndreaDi Rocco0000-0002-4587-89632024-12-092024-12-092024http://hdl.handle.net/20.500.12386/40694The alignment of optical systems is a crucial aspect to be considered in the design phase of astronomical instruments. As the size of telescopes and the related instruments is increasing, also the needs to have flexible measuring tools is developing in parallel to satisfy the scientific requirements. The development of the alignment techniques for small instruments is well validated throughout the history of the Optomechanical and astronomical instrumentation, nevertheless those techniques cannot be applied on large ones. This thesis proposes a procedure that allows to evaluate the position of optical elements in large volume very precisely. This enables the achievement of the scientific goals by minimizing the alignment procedure duration the costs. In this work it is evaluated the possibility to use a laser tracker as essential embedded tool for the alignment and for the monitoring of the instrument, or better, evaluate if the uncertainty of the tracker measuring the optical elements stay within the alignment requirements. The case study presented here is MORFEO which is a first-light instrument for the European Extremely Large Telescope. The study consists in the realization of a software that optimizes the position of the tracker inside the instrument considering the nominal position of the targets measured (SMRs) and the possible vignetting based on the prediction of the accuracy and repeatability of the measurements. This analysis is made by steps: the first one considers the error model gave from the manufacture of the tracker. The second one is based on a series of tests and characterizations performed in laboratory to determine more accurately the performances. The results obtained have been validated using a dummy version of an optomechanical element measured by using a Coordinate Measurement Machine (CMM).Alignment using the LT in the MORFEO at ELT instrumentationinproceedings10.1117/12.30201272024SPIE13094E..3ER