MAORY/MORFEO and LIFT: can the low order wavefront sensors become phasing sensors?

Guido Agapito; Lorenzo Busoni; Giulia Carlà; Cédric Plantet; Simone Esposito; Paolo Ciliegi

doi:10.1117/12.2629352

29 August 2022 MAORY/MORFEO and LIFT: can the low order wavefront sensors become phasing sensors?

Guido Agapito, Lorenzo Busoni, Giulia Carlà, Cédric Plantet, Simone Esposito, Paolo Ciliegi

Proceedings Volume 12185, Adaptive Optics Systems VIII; 1218556 (2022) https://doi.org/10.1117/12.2629352
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The Multiconjugate adaptive Optic Relay For ELT Observations (MORFEO, formerly known as MAORY) is the adaptive optics (AO) module for the Extremely Large Telescope (ELT) aimed at providing a 1 arcmin corrected field to the Multi-AO Imaging CamerA for Deep Observations (MICADO) and to a future client instrument. It should provide resolution close to the diffraction limit on a large portion of the sky and in a wide range of atmospheric conditions. Its ability to provide a flat wavefront must face the known aspect of the atmospheric turbulence and telescope environment, but also the final characteristic of a telescope still to be fully developed and built. In this work we focused on issues related to the segmentation of the telescope pupil (like low wind effect, residual phasing error at handover and control related issues), that could limit the system performance. MORFEO currently does not foresee a dedicated sensor to measure the phase step between adjacent mirror segments: in this work we study the possibility to use the low order wavefront sensors designed to sense and correct tip-tilt and focus as phasing sensors thanks to the linearized focal-plane technique (LIFT).

Citation Download Citation

Guido Agapito, Lorenzo Busoni, Giulia Carlà, Cédric Plantet, Simone Esposito, and Paolo Ciliegi "MAORY/MORFEO and LIFT: can the low order wavefront sensors become phasing sensors?", Proc. SPIE 12185, Adaptive Optics Systems VIII, 1218556 (29 August 2022); https://doi.org/10.1117/12.2629352

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