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Proceedings Paper

Modal Control For Wavefront Reconstruction In Adaptive Optics
Author(s): Josef Bille; Gerald Jahn; Michael Frieben
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Paper Abstract

In adaptive optics, the compensating phase distribution can be generated by an expansion of the turbulence phase distortions into modes of a set of basis functions, i.e. Zernike-polynomials and Karhunen-Loeve-functions. By applying a modal control concept to a practical adaptive optical system, the electrodes of a membrane mirror can be controlled in parallel with greatly reduced cross-talk. The coefficients of the approximating functions, each of which corresponds to a certain mode of the mirror surface, are fed back to the actuators by a modal control matrix. The atmospheric turbulences are taken into account by extending the local differential operator in an "observer"-like structure.

Paper Details

Date Published: 4 November 1982
PDF: 7 pages
Proc. SPIE 0332, Advanced Technology Optical Telescopes I, (4 November 1982); doi: 10.1117/12.933529
Show Author Affiliations
Josef Bille, University of Heidelberg (Germany)
Gerald Jahn, University of Heidelberg (Germany)
Michael Frieben, University of Heidelberg (Germany)

Published in SPIE Proceedings Vol. 0332:
Advanced Technology Optical Telescopes I
Lawrence D. Barr; Geoffrey Burbidge, Editor(s)

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