Physics – Optics
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003optl...28..798p&link_type=abstract
Optics Letters, Volume 28, Issue 10, pp. 798-800 (2003).
Physics
Optics
4
Fourier Transform Optics, Image Reconstruction, Adaptive Optics, Astronomical Telescopes, Performance Evaluation
Scientific paper
Wave-front reconstruction with use of the Fourier transform has been validated through theory and simulation. This method provides a dramatic reduction in computational costs for large adaptive (AO) systems. Because such a reconstructor can be expressed as a matrix, it can be used as an alternative in a matrix-based AO control system. This was done with the Palomar Observatory AO system on the 200-in. Hale telescope. Results of these tests indicate that Fourier-transform wave-front reconstruction works in a real system. For both bright and dim stars, a Hudgin-geometry Fourier-transform method produced performance comparable to that of the Palomar Adaptive Optics least squares. The Fried-geometry method had a noticeable Strehl ratio performance degradation of 0.043 in the K band (165-nm rms wave-front error added in quadrature) on a dim star.
Gavel Donald T.
Macintosh Bruce
Poyneer Lisa A.
Troy Mitchell
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