GTCAO low-frequency tip-tilt offload to M2

J. Marco de la Rosa; J. Rosich; O. Tubío; A. Basden; J. Patrón; I. Montilla; R. L. López; M. Puga; R. Simoes; E. González; M. Luis; H. de Paz; M. Huertas; S. Fernández; S. Navarro; G. Lombardi; M. Reyes; V. J. S. Béjar

doi:10.1117/12.3018732

27 August 2024 GTCAO low-frequency tip-tilt offload to M2

J. Marco de la Rosa, J. Rosich, O. Tubío, A. Basden, J. Patrón, I. Montilla, R. L. López, M. Puga, R. Simoes, E. González, M. Luis, H. de Paz, M. Huertas, S. Fernández, S. Navarro, G. Lombardi, M. Reyes, V. J. S. Béjar

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 130977S (2024) https://doi.org/10.1117/12.3018732
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

GTCAO is the instrument that implements Adaptive Optics on GTC. For atmospheric turbulence correction, GTCAO uses a deformable mirror. Unlike other AO systems, GTCAO does not include a dedicated mirror for low-frequency tip-tilt (TT) correction. In the absence of dedicated correction, the TT components of atmospheric turbulence are corrected by the deformable mirror (DM), using a significant portion of its working range and potentially leading to saturation. To mitigate this effect, GTCAO calculates low-frequency TT and offloads its correction to the telescope secondary mirror (M2) and primary axes. These actions optimize the use of the deformable mirror range for higher frequencies correction and extends the deformable mirror lifespan. This paper describes the approach implemented for calculating low-frequency TT from the information provided by the Shack-Hartmann wavefront sensor and the state of the DM, in both open-loop and closed-loop operation modes. Laboratory tests and telescope real observation results are also presented.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

J. Marco de la Rosa, J. Rosich, O. Tubío, A. Basden, J. Patrón, I. Montilla, R. L. López, M. Puga, R. Simoes, E. González, M. Luis, H. de Paz, M. Huertas, S. Fernández, S. Navarro, G. Lombardi, M. Reyes, and V. J. S. Béjar "GTCAO low-frequency tip-tilt offload to M2", Proc. SPIE 13097, Adaptive Optics Systems IX, 130977S (27 August 2024); https://doi.org/10.1117/12.3018732

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE