Strategies and considerations for the on-sky implementation of the controllable segmented primary mirror with AO WFS feedback

Benjamin Calvin; Michael P. Fitzgerald; Sam Ragland; Max Service

doi:10.1117/12.2677721

5 October 2023 Strategies and considerations for the on-sky implementation of the controllable segmented primary mirror with AO WFS feedback

Benjamin Calvin, Michael P. Fitzgerald, Sam Ragland, Max Service

Author Affiliations +

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126800C (2023) https://doi.org/10.1117/12.2677721
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

Maintaining the co-phasing of the primary mirror segments is a critical aspect to the operation of segmented telescopes. However, speckle-based measurements of the phasing of the Keck primary estimated static aberrations of approximately 90 nm rms that are not sensed by the current edge-sensing segment control system. We propose directly sensing and controlling the primary via the wavefront sensor of the adaptive optics system, as a Controllable Segmented Primary (CSP), to actively correct its phasing. In this work, we consider strategies for implementing and calibrating the CSP system on-sky.

Conference Presentation

Citation Download Citation

Benjamin Calvin, Michael P. Fitzgerald, Sam Ragland, and Max Service "Strategies and considerations for the on-sky implementation of the controllable segmented primary mirror with AO WFS feedback", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126800C (5 October 2023); https://doi.org/10.1117/12.2677721

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