Phase error estimation with broadband white light by phase diversity

Yuanhao Wu; Bin Wang; Zongyang Wang; Jingtai Cao; Xuguang Zhang

doi:10.1117/12.885423

31 December 2010 Phase error estimation with broadband white light by phase diversity

Yuanhao Wu, Bin Wang, Zongyang Wang, Jingtai Cao, Xuguang Zhang

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 754434 (2010) https://doi.org/10.1117/12.885423
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

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.

Citation Download Citation

Yuanhao Wu, Bin Wang, Zongyang Wang, Jingtai Cao, and Xuguang Zhang "Phase error estimation with broadband white light by phase diversity", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754434 (31 December 2010); https://doi.org/10.1117/12.885423

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