22 July 2014 The Giant Magellan Telescope active optics system
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Abstract
The Giant Magellan Telescope active optics system is required to maintain image quality across a 20 arcminute diameter field of view. To do so, it must control the positions of the primary mirror and secondary mirror segments, and the figures of the primary mirror segments. When operating with its adaptive secondary mirror, the figure of the secondary is also controlled. Wavefront and fast-guiding measurements are made using a set of four probes deployed around the field of view. Through a set of simulations we have determined a set of modes that will be used to control fielddependent aberrations without degeneracies.
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Brian McLeod, Antonin H. Bouchez, Brady Espeland, José Filgueira, Matt Johns, Timothy J. Norton, Mark Ordway, William A. Podgorski, John Roll, Carey Smith, "The Giant Magellan Telescope active optics system", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91451T (22 July 2014); doi: 10.1117/12.2056435; https://doi.org/10.1117/12.2056435
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