Modal Control For Wavefront Reconstruction In Adaptive Optics

Josef Bille; Gerald Jahn; Michael Frieben

doi:10.1117/12.933529

4 November 1982 Modal Control For Wavefront Reconstruction In Adaptive Optics

Josef Bille, Gerald Jahn, Michael Frieben

Author Affiliations +

Proceedings Volume 0332, Advanced Technology Optical Telescopes I; (1982) https://doi.org/10.1117/12.933529
Event: 1982 Astronomy Conferences, 1982, Tucson, United States

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.

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Josef Bille, Gerald Jahn, and Michael Frieben "Modal Control For Wavefront Reconstruction In Adaptive Optics", Proc. SPIE 0332, Advanced Technology Optical Telescopes I, (4 November 1982); https://doi.org/10.1117/12.933529

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