MAVIS: preliminary mechanical design overview of the adaptive optics module

Matteo Aliverti; Simone Doniselli; Gaston Gausachs; Davide Greggio; Valentina Viotto; Bryan Taylor; Antony Galla; Nicholas Herrald; Warrick Schofield; Dionne Haynes; Luca Marafatto; Maria Bergomi; Simonetta Chinellato

doi:10.1117/12.2630068

29 August 2022 MAVIS: preliminary mechanical design overview of the adaptive optics module

Matteo Aliverti, Simone Doniselli, Gaston Gausachs, Davide Greggio, Valentina Viotto, Bryan Taylor, Antony Galla, Nicholas Herrald, Warrick Schofield, Dionne Haynes, Luca Marafatto, Maria Bergomi, Simonetta Chinellato

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 1218441 (2022) https://doi.org/10.1117/12.2630068
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

MAVIS is a Multi-Conjugate Adaptive Optics for the UT4 of VLT designed to deliver a corrected FoV to a spectrograph, an imager, and a visiting instrument. An optical bench is used to support the post focal relay optics, which include the ADC, a K-mirror, the DM, and the selector. Said bench also rigidly supports the calibration, the LGS module, the NGS module and the imager providing the maximum stability and repeatability during maintenance operations. The Adaptive Optics Module structure (AOMS) was rigidly connected to the Nasmyth platform structure via the Overall Mechanical Structure (OMS). The OMS also provides structural integrity for the Spectrograph sub-system while isolating it from the main enclosure. At this level the AOMS and the OMS have been merged in a single structure; the decision about keeping them together or separated will be taken in the future depending on mechanical and integration considerations. The preliminary design choices adopted while designing these subsystems are presented considering the actual mechanical and thermal requirements. Particular attention is given to the derotation system design (K-mirror) and the analyses done to choose the materials and the adhesives.

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Matteo Aliverti, Simone Doniselli, Gaston Gausachs, Davide Greggio, Valentina Viotto, Bryan Taylor, Antony Galla, Nicholas Herrald, Warrick Schofield, Dionne Haynes, Luca Marafatto, Maria Bergomi, and Simonetta Chinellato "MAVIS: preliminary mechanical design overview of the adaptive optics module", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 1218441 (29 August 2022); https://doi.org/10.1117/12.2630068

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