Active Mirror Segment Figure Control

E. R. Washwell; D. L. Edwards; A. H. Gelders; R. J. Serviss; D. H. Wilson

doi:10.1117/12.934198

23 August 1983 Active Mirror Segment Figure Control

E. R. Washwell, D. L. Edwards, A. H. Gelders, R. J. Serviss, D. H. Wilson

Proceedings Volume 0365, Adaptive Optics Systems and Technology; (1983) https://doi.org/10.1117/12.934198
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

Abstract

Experimental verification of the NEPSPP nonlinear finite-element mirror model and stable closed-loop correction of an optically aberrateel wavefront have been demonstrated. These results were obtained using a single 60-deg segment of a 45-cm diameter, 1-inch-thick Zero-dur spherical mirror (f/1.7) having a 25-percent central obscuration. Seventeen holographically produced Hartmann sampling gratings were used for the figure sensing in the closed loop experiments and 30 electrodynamic actuators for figure control. The entire system was under computer control. The mirror model predictions of the surface were verified by analysis of interferograms of the segment taken with a Point Diffraction Interferometer (PDI) and analyzed by the FRINGE program. Details of the experimental configuration and auantitative results are presented.

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E. R. Washwell, D. L. Edwards, A. H. Gelders, R. J. Serviss, and D. H. Wilson "Active Mirror Segment Figure Control", Proc. SPIE 0365, Adaptive Optics Systems and Technology, (23 August 1983); https://doi.org/10.1117/12.934198

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