Fast Wavefront Reconstruction in Large Adaptive Optics Systems Using the Fourier Transform [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy, 2002.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: 21p : digital, PDF file
Additional Creators: Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

Wavefront Reconstruction using the Fast Fourier Transform and spatial filtering is shown to be computationally tractable and sufficiently accurate for use in large Shack Hartmann-based adaptive optics systems (up to at least 10,000 actuators). This method is significantly faster and can have lower noise propagation than traditional VMM reconstructors. The boundary problem which prevented the accurate reconstruction of phase in circular apertures using square-grid FTs is identified and solved. The methods are adapted for use on the Fried-geometry. Detailed performance analysis of mean squared error and noise propagation for FT methods is presented, using both theory and simulation.

Report Numbers

E 1.99:ucrl-jc-147058
ucrl-jc-147058

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Note

Published through SciTech Connect.
01/13/2002.
"ucrl-jc-147058"
SPIE Astronomical Telescope and Instrumentation, Waikoloa, HI, Aug 22 - Aug 28, 2002.
Poyneer, L; Brase, J M; Gravel, D T.

Funding Information

W-7405-ENG-48

View MARC record | catkey: 13823724