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Proceedings Paper

Phase error estimation with broadband white light by phase diversity
Author(s): Yuanhao Wu; Bin Wang; Zongyang Wang; Jingtai Cao; Xuguang Zhang
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Paper Abstract

The technique of Phase Diversity (PD) is widely adopted to measure the wavefront error caused by atmosphere turbulence and system error. PD solves the Zernike coefficients of the wavefront by utilizing two images obtained with different defocus value. In this paper, we propose a method to restore the image and estimate the wavefront error of an imaging system. And we use present white noises to verify the robustness of the algorithm. We design an experiment system and implement it in our laboratory. The proposed algorithm is validated by computer simulations and experimental results. To use a broadband white object in experimental system a reasonable simplification for the system model is done. Our results show that the robustness against Gaussian white noises of the method is better then the case when the variance value is 0.03. The proposed method can be used as a wavefront sensor and restore the degradative images by photoelectric image system.

Paper Details

Date Published: 31 December 2010
PDF: 6 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754434 (31 December 2010); doi: 10.1117/12.885423
Show Author Affiliations
Yuanhao Wu, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Bin Wang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Zongyang Wang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Jingtai Cao, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Xuguang Zhang, Yanshan Univ. (China)


Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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