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Proceedings Paper

Diagnosing unknown aberrations in an adaptive optics system using phase diversity
Author(s): David J. Lee; Byron M. Welsh; Michael C. Roggemann; Brent L. Ellerbroek
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Paper Abstract

We outline a novel method for the estimating a fixed aberration that is in the image path, but not in the wavefront sensor (WFS) path of an adaptive optics (AO) imaging system. We accomplish this through a non-traditional application of the Gonsalves least-squares phase diversity technique using an ensemble of images and WFS data. The diversity phases required for the Gonsalves technique are provided by the temporal differences in WFS residual phase measurements for different members of the ensemble. The technique is demonstrated using actual observations from an operational AO system exhibiting such aberration. An estimate of this aberration was obtained using the proposed algorithm which agrees reasonably well with the observed point-spread function.

Paper Details

Date Published: 30 October 1997
PDF: 12 pages
Proc. SPIE 3164, Applications of Digital Image Processing XX, (30 October 1997); doi: 10.1117/12.279583
Show Author Affiliations
David J. Lee, Air Force Research Lab. (United States)
Byron M. Welsh, Air Force Institute of Technology (United States)
Michael C. Roggemann, Air Force Institute of Technology (United States)
Brent L. Ellerbroek, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 3164:
Applications of Digital Image Processing XX
Andrew G. Tescher, Editor(s)

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