title: Adaptive optics implementation with a Fourier reconstructor.
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.
authors.affiliation: Technion-Israel Institute of Technology, Haifa, Israel.
authors.forename: Oded
authors.initials: O
authors.lastname: Glazer
authors.forename: Erez N
authors.initials: EN
authors.lastname: Ribak
authors.forename: Leonid
authors.initials: L
authors.lastname: Mirkin