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J Opt Soc Am A Opt Image Sci Vis. 2012 Apr 1;29(4):585-92. doi: 10.1364/JOSAA.29.000585.

Focal-plane detection and object reconstruction in the noninterferometric phase imaging.

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Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore.


In this paper, we propose effective methods to detect focal planes and recover objects in the noninterferometric phase imaging. A strategy using different aberration coefficients is developed, and a series of diffraction intensity maps is sequentially recorded by a charge-coupled device. During numerical reconstruction, a phase retrieval algorithm is applied to extract object wavefront from diffraction intensity maps. Subsequently, numerical methods are proposed to detect focal planes, and high-quality phase maps are recovered by using the detected focal distances. Theoretical results are presented to demonstrate feasibility and effectiveness of the proposed methods.

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