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Proceedings Paper

Status of the 6.5m MMT Telescope laser adaptive optics system
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Paper Abstract

The Laser Adaptive Optics system of the 6.5 m MMT telescope has now been commissioned with Ground Layer Adaptive Optics operations as a tool for astronomical science. In this mode the wavefronts sampled by each of five laser beacons are averaged, leading to an estimate of the aberration in the ground layer. The ground layer is then compensated by the deformable secondary mirror at 400 Hz. Image quality of 0.2-0.3 arc sec is delivered in the near infrared bands from 1.2-2.5 μm over a field of view of 2 arc minutes. Tomographic wavefront sensing tests in May 2010 produced open loop data necessary to streamline the software to generate a Laser Tomography Adaptive Optics (LTAO) reconstructor. In addition, we present the work being done to achieve optimal control PID wavefront control and thus increase the disturbance rejection frequency response for the system. Finally, we briefly describe plans to mount the ARIES near infrared imager and echelle spectrograph, which will support the 2 arc min ground-layer corrected field and will exploit the diffraction limit anticipated with LTAO.

Paper Details

Date Published: 14 July 2010
PDF: 12 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77360O (14 July 2010); doi: 10.1117/12.857663
Show Author Affiliations
Eduardo A. Bendek, Steward Observatory, The Univ. of Arizona (United States)
Michael Hart, Steward Observatory, The Univ. of Arizona (United States)
Keith B. Powell, Steward Observatory, The Univ. of Arizona (United States)
Norman M. Milton, Steward Observatory, The Univ. of Arizona (United States)
Vidhya Vaitheeswaran, Steward Observatory, The Univ. of Arizona (United States)
Don McCarthy, Steward Observatory, The Univ. of Arizona (United States)
Craig Kulesa, Steward Observatory, The Univ. of Arizona (United States)
Shawn Callahan, MMT Observatory (United States)
S. Mark Ammons, Steward Observatory, The Univ. of Arizona (United States)
Aurea Garcia Rissmann, Steward Observatory, The Univ. of Arizona (United States)


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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