title: Methods for the characterization of deformable membrane mirrors.
abstract: We demonstrate two methods for the characterization of deformable membrane mirrors and the training of adaptive optics systems that employ these mirrors. Neither method employs a wave-front sensor. In one case, aberrations produced by a wave-front generator are corrected by the deformable mirror by use of a rapidly converging iterative algorithm based on orthogonal deformation modes of the mirror. In the other case, a simple interferometer is used with fringe analysis and phase-unwrapping algorithms. We discuss how the choice of singular values can be used to control the pseudoinversion of the control matrix.
authors.affiliation: Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK. martin.booth@eng.ox.ac.uk
authors.forename: Martin
authors.initials: M
authors.lastname: Booth
authors.forename: Tony
authors.initials: T
authors.lastname: Wilson
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Sun
authors.forename: Taisuke
authors.initials: T
authors.lastname: Ota
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kawata