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Journal of Biomedical Optics • new

Enhancing imaging contrast via weighted feedback for iterative multi-image phase retrieval
Author(s): Cheng Guo; Qiang Li; Xiaoqing Zhang; JiuBin Tan; Shutian Liu; Zhengjun Liu
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Paper Abstract

Iterative phase retrieval (IPR) has developed into a feasible and simple computational method to retrieve a complex-valued sample. Due to coherent illumination, the reconstructed image quality is degraded by speckle noise arising from a laser. Accordingly, partially coherent illumination has been introduced to alleviate this restriction. We apply weighted feedback modality into multidistance and multiwavelength phase retrieval to realize high-contrast and fast imaging. In simulation, it is proved that IPR based on weighted feedback accelerates the convergence in partially coherent illumination and speckle illumination. In experiment, the resolution chart and biological specimen are reconstructed in lensless and lens-based systems, which also demonstrate the performance of weighted feedback. This work provides a simple and high-contrast imaging modality for IPR. Also, it facilitates compact and flexible experimental implementation for label-free imaging.

Paper Details

Date Published: 31 January 2018
PDF: 10 pages
J. Biomed. Opt. 23(1) 016015 doi: 10.1117/1.JBO.23.1.016015
Published in: Journal of Biomedical Optics Volume 23, Issue 1
Show Author Affiliations
Cheng Guo, Harbin Institute of Technology (China)
Qiang Li, Harbin Institute of Technology (China)
Xiaoqing Zhang, Harbin Institute of Technology (China)
JiuBin Tan, Harbin Institute of Technology (China)
Shutian Liu, Harbin Institute of Technology (China)
Zhengjun Liu, Harbin Institute of Technology (China)

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