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Proceedings Paper

High-resolution imaging of phase-distorted extended object using SPGD algorithm and deformable mirror
Author(s): Huizhen Yang; Xinyang Li; Wenhan Jiang
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Paper Abstract

The conventional adaptive optics (AO) technique based on phase conjugate principle requires the information about a reference wave front that corresponds to the undistorted image when it is applied to extended source image correction. The AO technique based on the image function appears more promising than the conventional AO for this application. The success of this technique depends on an appropriate image quality criterion and a suitable control algorithm. We tried to find a convenient image performance metric not from additional optics elements, but only from the distorted image which is a gray level image. Simulation results showed the variance function of gray level presents more potential than other ways, such as ways based on the information about the gray level gradient of each pixel. Based on SPGD algorithm, an AO system was simulated with a 61-element deformable mirror and the above resultant image quality criterion. The correction capability of the AO system was investigated through different images and different level aberrations. Numerical simulation results verified the performance metric we used is effective. The system can correct different level disturbed images successfully when parameters of the algorithm were appropriate for static distorted wave-fronts.

Paper Details

Date Published: 6 December 2007
PDF: 9 pages
Proc. SPIE 6834, Optical Design and Testing III, 683411 (6 December 2007); doi: 10.1117/12.754993
Show Author Affiliations
Huizhen Yang, Institute of Optics and Electronics (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Xinyang Li, Institute of Optics and Electronics (China)
Wenhan Jiang, Institute of Optics and Electronics (China)

Published in SPIE Proceedings Vol. 6834:
Optical Design and Testing III
Yongtian Wang; Theo T. Tschudi; Jannick P. Rolland; Kimio Tatsuno, Editor(s)

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