MAVIS Adaptive Optics Module: optical configuration and expected performance

Greggio, Davide; Taylor, B.; Bonaglia, Marco; Viotto, Valentina; Bergomi, Maria; Pinna, Enrico; Agapito, Guido; Ströbele, Stefan; Aliverti, Matteo; Radhakrishnan, Kalyan; Schwab, Christian; Cranney, Jesse; Vaughn, Israel J.; Marafatto, Luca; Magrin, Demetrio; Brodrick, David; Chinellato, Simonetta; Rigaut, François

doi:10.1117/12.2630017

Cited by 3 publications

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“…The AOM optical design (shown in Figure 1) was presented in [10] and the expected optical performance are analyzed in [11]. The design was conceived to minimize the number of optical elements, so to push the system throughput, and to optimize the overall stability.…”

Section: Aom Design Conceptmentioning

confidence: 99%

MAVIS: preliminary design of the adaptive optics module

Viotto

Pinna

Agapito

et al. 2022

Adaptive Optics Systems VIII

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MAVIS will be part of the next generation of VLT instrumentation and it will include a visible imager and a spectrograph, both fed by a common Adaptive Optics Module. The AOM consists in a MCAO system, whose challenge is to provide a 30" AO-corrected FoV in the visible domain, with good performance in a 50% sky coverage at the Galactic Pole. To reach the required performance, the current AOM scheme includes the use of up to 11 reference sources at the same time ( 8LGSs + 3 NGSs) to drive more than 5000 actuators, divided into 3 deformable mirrors (one of them being UT4 secondary mirror). The system also includes some auxiliary loops, that are meant to compensate for internal instabilities (including WFSs focus signal, LGS tip-tilt signal and pupil position) so to push the stability of the main AO loop and the overall performance. Here we present the Preliminary Design of the AOM, which evolved, since the previous phase, as the result of further trade-offs and optimizations. We also introduce the main calibration strategy for the loops and sub-systems, including NCPA calibration approach. Finally, we present a summary of the main results of the performance and stability analyses performed for the current design phase, in order to show compliance to the performance requirements.

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Section: Aom Design Conceptmentioning

confidence: 99%

MAVIS: preliminary design of the adaptive optics module

Viotto

Pinna

Agapito

et al. 2022

Adaptive Optics Systems VIII

Self Cite

View full text Add to dashboard Cite

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MAVIS: preliminary mechanical design overview of the adaptive optics module

Aliverti¹,

Doniselli

Gausachs

et al. 2022

Ground-Based and Airborne Instrumentation for Astronomy IX

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MAVIS: mechanical design and prototyping of the adaptive optics module toward the FDR

Aliverti,

Doniselli,

Greggio

et al. 2024

Ground-Based and Airborne Instrumentation for Astronomy X

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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, kinematically mounted on the overall main structure (OMS) is used to support the post focal relay optics, which include the ADC, a K-mirror, the DMs, the calibration, and the selectors. Said bench also rigidly supports the LGS module, the NGS module and the imager.The design and analysis of the steel bench is presented together with the design, analysis, and prototyping of the optomechanical elements. Particular attention is given to the evolution of the derotation system design (K-mirror), which has been strongly improved, and to the prototyping plan.

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MAVIS Adaptive Optics Module: optical configuration and expected performance

Cited by 3 publications

References 0 publications

MAVIS: preliminary design of the adaptive optics module

MAVIS: preliminary design of the adaptive optics module

MAVIS: preliminary mechanical design overview of the adaptive optics module

MAVIS: mechanical design and prototyping of the adaptive optics module toward the FDR

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