Testbed for extended-scene Shack-Hartmann and phase retrieval wavefront sensing

Details Testbed for extended-scene Shack-Hartmann and phase retrieval wavefront sensing Testbed for extended-scene Shack-Hartmann and phase retrieval wavefront sensing

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5903..160m&link_type=abstract

Astronomical Adaptive Optics Systems and Applications II. Edited by Tyson, Robert K.; Lloyd-Hart, Michael. Proceedings of the

Physics

Optics

Scientific paper

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.

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