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Robust statistical phase-diversity method for high-accuracy wavefront sensing
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DOI：10.1016/j.optlaseng.2020.106335.png)
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摘要
En 中文
Phase diversity phase retrieval (PDPR) has been a popular technique for quantitatively measuring wavefront errors of optical imaging systems by extracting the phase information from several designated intensity measurements. As the problem is inverse and non-convex in general, the accuracy and robustness of most such algorithms rely greatly on the initial conditions. In this work, we propose a new strategy that combines Limited-Memory Broyden-Fletcher-Goldfarb-Shanno (L-BFGS) with the initial points generated by k-means clustering method and three various channels to improve the overall performance. Experimental results show that, for 500 different phase aberrations with root mean square (RMS) value bounded within [0.2 lambda, 0.3 lambda], the minimum, the maximum and the mean RMS residual errors reach 0.017 lambda, 0.066 lambda and 0.039 lambda, respectively, and 84.8% of the RMS residual errors are less than 0.05 lambda. We have further investigated and analyzed the proposed method in details to quantitatively demonstrate its performance: statistical results reveal that our proposed PDPR with k-means clustering enhanced method has excellent robustness in terms of initial points and other influential factors, and the accuracy can outperform its counterpart methods such as classic L-BFGS and modified BFGS.
Keyword:
Wavefront sensing
Phase diversity
Phase retrieval
Global searching solver
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3.7
论文数:
7.3K
被引数:
1.7W
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Optical wavefront measurement using phase retrieval with transverse translation diversity.png)
OPTICS EXPRESS
OAAI
OPTICS EXPRESSIF3.3
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