The adaptive optics modes for HARMONI: from Classical to Laser Assisted Tomographic AO
B. Neichel, T. Fusco, J.-F. Sauvage, C. Correia, K. Dohlen, K., El-Hadi, L. Blanco, N. Schwartz, F. Clarke, N. Thatte, M. Tecza, J. Paufique,, J. Vernet, M. Le Louarn, P. Hammersley, J.-L. Gach, S. Pascal, P. Vola, C., Petit, J.-M. Conan, A. Carlotti, C. Verinaud, H. Schnetler
TL;DR
This paper discusses the design and performance assessment of adaptive optics systems for the HARMONI spectrograph on the E-ELT, covering classical and laser-assisted tomographic AO modes to achieve diffraction-limited imaging.
Contribution
It details the system choices and strategies for SCAO and LTAO modules, including wave-front sensor configurations and initial performance evaluations.
Findings
Describes wave-front sensor strategies for SCAO and LTAO.
Presents potential implementations of AO modules.
Assesses initial system performance.
Abstract
HARMONI is a visible and NIR integral field spectrograph, providing the E-ELT's core spectroscopic capability at first light. HARMONI will work at the diffraction limit of the E-ELT, thanks to a Classical and a Laser Tomographic AO system. In this paper, we present the system choices that have been made for these SCAO and LTAO modules. In particular, we describe the strategy developed for the different Wave-Front Sensors: pyramid for SCAO, the LGSWFS concept, the NGSWFS path, and the truth sensor capabilities. We present first potential implementations. And we asses the first system performance.
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