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

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.

Citation Download Citation

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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