Abstract
Adaptive optics takes its servo feedback error cue from a wavefront sensor. The common Hartmann–Shack spot grid that represents the wavefront slopes is usually analyzed by finding the spot centroids. In a novel application, we used the Fourier decomposition of a spot pattern to find deviations from grid regularity. This decomposition was performed either in the Fourier domain or in the image domain, as a demodulation of the grid of spots. We analyzed the system, built a control loop for it, and tested it thoroughly. This allowed us to close the loop on wavefront errors caused by turbulence in the optical system.
© 2007 Optical Society of America
Full Article | PDF ArticleMore Like This
Luc Gilles, Brent L. Ellerbroek, and Curtis R. Vogel
Appl. Opt. 42(26) 5233-5250 (2003)
Jean-François Lavigne and Jean-Pierre Véran
J. Opt. Soc. Am. A 25(9) 2271-2279 (2008)
Douglas G. MacMartin
J. Opt. Soc. Am. A 20(6) 1084-1093 (2003)