Single conjugate adaptive optics for METIS

Bertram, Thomas; Absil, Olivier; Bizenberger, Peter; Brandner, Wolfgang; Briegel, Florian; Cantalloube, Faustine; Carlomagno, Brunella; Cárdenas Vázquez, María. Concepción; Feldt, Markus; Glauser, Adrian M.; Henning, Thomas; Hippler, Stefan; Huber, Armin; Hurtado, Norma; Kenworthy, Matthew A.; Kulas, Martin; Mohr, Lars; Naranjo, Vianak; Neureuther, Philip; Obereder, Andreas; Rohloff, Ralf-Rainer; Scheithauer, Silvia; Shatokhina, Iuliia; Stuik, Remko; van Boekel, Roy

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Single conjugate adaptive optics for METIS

MPS-Authors

Bertram, Thomas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Absil, Olivier
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bizenberger, Peter
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Brandner, Wolfgang
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Briegel, Florian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cantalloube, Faustine
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Carlomagno, Brunella
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cárdenas Vázquez, María. Concepción
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Feldt, Markus
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Glauser, Adrian M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henning, Thomas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hippler, Stefan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Huber, Armin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hurtado, Norma
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kenworthy, Matthew A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kulas, Martin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mohr, Lars
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Naranjo, Vianak
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Neureuther, Philip
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Obereder, Andreas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rohloff, Ralf-Rainer
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Scheithauer, Silvia
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Shatokhina, Iuliia
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Stuik, Remko
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

van Boekel, Roy
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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https://ui.adsabs.harvard.edu/abs/2018SPIE10703E..14B
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Citation

Bertram, T., Absil, O., Bizenberger, P., Brandner, W., Briegel, F., Cantalloube, F., et al. (2018). Single conjugate adaptive optics for METIS.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CEEA-C

Abstract

METIS is the Mid-infrared Extremely large Telescope Imager and Spectrograph, one of the first generation instruments of ESO's 39m ELT. All scientific observing modes of METIS require adaptive optics (AO) correction close to the diffraction limit. Demanding constraints are introduced by the foreseen coronagraphy modes, which require highest angular resolution and PSF stability. Further design drivers for METIS and its AO system are imposed by the wavelength regime: observations in the thermal infrared require an elaborate thermal, baffling and masking concept. METIS will be equipped with a Single-Conjugate Adaptive Optics (SCAO) system. An integral part of the instrument is the SCAO module. It will host a pyramid type wavefront sensor, operating in the near-IR and located inside the cryogenic environment of the METIS instrument. The wavefront control loop as well as secondary control tasks will be realized within the AO Control System, as part of the instrument. Its main actuators will be the adaptive quaternary mirror and the field stabilization mirror of the ELT. In this paper we report on the phase B design work for the METIS SCAO system; the opto-mechanical design of the SCAO module as well as the control loop concepts and analyses. Simulations were carried out to address a number of important aspects, such as the impact of the fragmented pupil of the ELT on wavefront reconstruction. The trade-off that led to the decision for a pyramid wavefront sensor will be explained, as well as the additional control tasks such as pupil stabilization and compensation of non-common path aberrations.