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Proceedings Paper

Testbed for extended-scene Shack-Hartmann and phase retrieval wavefront sensing
Author(s): Rhonda M. Morgan; Kirill V. Shcheglov; Joseph J. Green; Catherine M. Ohara; Jennifer Roberts; Erkin Sidick
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Paper Abstract

We have implemented a testbed to demonstrate wavefront sensing and control on an extended scene using Shack-Hartmann and MGS phase retrieval simultaneously. This dual approach allows for both high sensitivity and high dynamic range wavefront sensing. Aberrations are introduced by a silicon-membrane deformable mirror. The detailed characterization of this mirror and its sensitivity matrix are presented. The various Shack-Hartmann algorithms, including a maximum likelihood approach are discussed and compared to phase retrieval results using a point source. The next phase of the testbed will include results with extended scenes.

Paper Details

Date Published: 8 October 2005
PDF: 10 pages
Proc. SPIE 5903, Astronomical Adaptive Optics Systems and Applications II, 59030I (8 October 2005); doi: 10.1117/12.627747
Show Author Affiliations
Rhonda M. Morgan, Jet Propulsion Lab. (United States)
Kirill V. Shcheglov, Jet Propulsion Lab. (United States)
Joseph J. Green, Jet Propulsion Lab. (United States)
Catherine M. Ohara, Jet Propulsion Lab. (United States)
Jennifer Roberts, Jet Propulsion Lab. (United States)
Erkin Sidick, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 5903:
Astronomical Adaptive Optics Systems and Applications II
Robert K. Tyson; Michael Lloyd-Hart, Editor(s)

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