MAVIS (MCAO-Assisted Visible Imager and Spectrograph) is an instrument proposed for the VLT Adaptive Optics Facility (AOF), which is currently in the phase-A conceptual design study. It will be the first instrument performing Multi-conjugate adaptive optics at visible wavelengths, enabling a new set of science observations. MAVIS will be installed at the Nasmyth platform of VLT UT-4 taking advantage of the already operational Adaptive Optics Facility that consists of 4 LGS and an adaptive secondary mirror with 1170 actuators. In addition, two post-focal deformable mirrors and 3 Natural Guide Stars (NGS) are foreseen for the tomographic reconstruction and correction of atmospheric turbulence.
The MAVIS AO module is intended to feed both an imager and a spectrograph that will take advantage of the increased resolution and depth with respect to current instrumentation.
In this paper we present the trade-off study for the optical design of the MAVIS AO module, highlighting the peculiarities of the system and the requirements imposed by AO. We propose a set of possible optical solutions able to provide a compact and efficient implementation of the different subsystems and we compare them in terms of delivered optical quality, overall throughput, encumbrance, ease of alignment and residual distortion.
|Title of host publication||AO4ELT6|
|Subtitle of host publication||Proceedings of the 6th International Conference on Adaptive Optics for Extremely Large Telescopes|
|Place of Publication||Quebec|
|Number of pages||9|
|Publication status||Published - Jun 2019|
|Event||6th International Conference on Adaptive Optics for Extremely Large Telescopes, AO4ELT 2019 - Quebec City, Canada|
Duration: 9 Jun 2019 → 14 Jun 2019
|Conference||6th International Conference on Adaptive Optics for Extremely Large Telescopes, AO4ELT 2019|
|Period||9/06/19 → 14/06/19|
- Design optimization
- Optical design
- Relay optics
- Visible adaptive optics