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Proceedings Paper

Remote alignment of adaptive optical systems with far-field optimization
Author(s): Naresh C. Mehta
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Paper Abstract

A novel scheme for remote alignment of adaptive optical systems is presented. In comparison to conventional methods where near-field measurements (in the form of near-field phase across the adaptive component or gaps between neighboring segments) are used for feedback control, Far-Field Optimization utilizes only the far-field intensity. A figure of merit based solely on the point spread function is used to iteratively configure the adaptive elements to optical alignment. In this review paper, we first describe the far-field optimization method and then discuss its application to three different adaptive optical systems - a deformable mirror, a segmented mirror and a multiple mirror telescope. The convergence, efficiency and robustness of the iterative far-field optimization are illustrated with computer simulations. Experimental validation of the novel technique for adaptive optics alignment is demonstrated with results from a laboratory test with a segmented mirror. Potential utility of far-field optimization for dynamic wavefront control (e.g. atmospheric turbulence compensation) is briefly discussed.

Paper Details

Date Published: 1 May 1991
PDF: 16 pages
Proc. SPIE 1408, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere II, (1 May 1991); doi: 10.1117/12.43549
Show Author Affiliations
Naresh C. Mehta, Lockheed Palo Alto Research Lab. (United States)

Published in SPIE Proceedings Vol. 1408:
Propagation of High-Energy Laser Beams Through the Earth's Atmosphere II
Peter B. Ulrich; LeRoy E. Wilson, Editor(s)

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