Rebrysh, OleksandraGreggio, DavideCarlà, GiuliaAgapito, GuidoCranney, JesseVaughn, IsraelViotto, ValentinaRigaut, FrançoisBrodrick, DavidHaynes, Dionne M.Bournane, Mohamed Yahia2025-06-012025-06-01978-1-5106-7356-4978-1-5106-7357-10277-786XWOS:001281493400007ORCID:/0000-0003-3490-7121/work/174839005http://www.scopus.com/inward/record.url?scp=85200707405&partnerID=8YFLogxKhttps://hdl.handle.net/1885/733756326Natural Guide Star (NGS) wavefront sensors (WFS) play a crucial role in multi-conjugate adaptive optics systems by detecting low-order aberrations that laser guide stars cannot measure. In the framework of MAVIS, we plan to use the light from three NGSs to correct the tip-tilt and low-order errors of the wavefront. In this work, we conduct the analysis of the distortions caused by mid-spatial frequency figure errors of the optical surfaces in the NGS WFS channel of the adaptive optics module of MAVIS. These distortions, stemming from component imperfections, can significantly impact wavefront measurements and, consequently, the plate scale in the image plane of the entire instrument. We analyse their influence on the plate scale variations during tracking. Our study quantifies the effect, shedding light on the impact of non-common path distortions between the NGS WFS and the scientific instruments on plate scale variations, ultimately contributing to optimising the MAVIS performance.The MAVIS Astralis consortium nodes received funding under the Australian Government's National Collaborative Research Infrastructure Strategy (NCRIS) Program via Astronomy Australia Ltd (AAL). The MAVIS Italian nodes are supported by recurrent funds from INAF. The MAVIS hardware is funded by ESO, the Australian Research Council (through the LIEF grant LE220100037), NCRIS and the Australian National University, as well as a number of Australian Universities. This work benefited from support by the french government under the France 2030 investment plan, as part of the Initiative d'Excellence d'Aix-Marseille Universite AMIDEX (AMX-22-RE-AB-151) and the Action Specifique Haute Resolution Angulaire (ASHRA) of CNRS/INSU.8enPublisher Copyright: © 2024 SPIE.adaptive opticsdistortionsMAVISplate scale2024-06-1710.1117/12.301630685200707405