Remote alignment of adaptive optical systems with far-field optimization

Naresh C. Mehta

doi:10.1117/12.43549

1 May 1991 Remote alignment of adaptive optical systems with far-field optimization

Naresh C. Mehta

Proceedings Volume 1408, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere II; (1991) https://doi.org/10.1117/12.43549
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

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.

Citation Download Citation

Naresh C. Mehta "Remote alignment of adaptive optical systems with far-field optimization", Proc. SPIE 1408, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere II, (1 May 1991); https://doi.org/10.1117/12.43549

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