Adaptive optics, transfer loops modeling

Details Adaptive optics, transfer loops modeling Adaptive optics, transfer loops modeling

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1542...46b&link_type=abstract

In: Active and adaptive optical systems; Proceedings of the Meeting, San Diego, CA, July 22-24, 1991 (A93-39451 15-74), p. 46-61

Physics

Optics

Adaptive Optics, Mathematical Models, Mirrors, Transfer Functions, Actuators, Block Diagrams

Scientific paper

An adaptive optical system dedicated to high resolution imaging can be modelized in terms of transfer loops. This model permits one to estimate the response of such a system to time-varying wavefront perturbation. A block diagram describing the closed loop of the adaptive optics of the Come-On project is given and a theoretical expression expressed in terms of the Z transform is found for the case of a nodal approach. In a second step, identification methods are used to determine the best parameter values of these nodal models. Finally, the responses of these models to known perturbations are compared with the experimental data recorded during the Come-On experiments. The same analyses are conducted for modal models. In these two cases, the results are found to be in good agreement.

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