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Proceedings Paper

The GMT adaptive optics system
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Paper Abstract

The design of the adaptive optics (AO) system for the GMT is currently being developed. The baseline system is planned around a segmented adaptive secondary mirror (ASM), with elements similar in size to current ASM's for 8 m telescopes. A facility wavefront sensing system is planned to provide AO correction at several science instrument ports. The AO system will contain a subsystem dedicated to controlling the relative phases between the seven segments of the GMT aperture. The anticipated modes include natural guide star, laser tomography, and ground layer adaptive optics. A cooled optical relay is described to provide baffling and reimaging of the focal plane to the various science ports. The laser projection system will use six beacons on an adjustable radius to support both diffraction-limited and ground layer correction modes. Modeling work, as well as science instrument design development will be integrated with this design effort to develop a concept that provides efficient diffraction-limited performance and seeing-improved capabilities for the GMT.

Paper Details

Date Published: 14 July 2010
PDF: 12 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77360C (14 July 2010); doi: 10.1117/12.857968
Show Author Affiliations
Philip M. Hinz, Steward Observatory, The Univ. of Arizona (United States)
Antonin Bouchez, GMTO Corp. (United States)
Matt Johns, GMTO Corp. (United States)
Stephen Shectman, Carnegie Observatories (United States)
Michael Hart, Steward Observatory, The Univ. of Arizona (United States)
Brian McLeod, Smithsonian Astrophysical Observatory (United States)
Peter McGregor, The Australian National Univ. (Australia)

Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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