Variable aperture-based ptychographical iterative engine method

Aihui Sun; Yan Kong; Xin Meng; Xiaoliang He; Ruijun Du; Zhilong Jiang; Fei Liu; Liang Xue; Shouyu Wang; Cheng Liu

doi:10.1117/1.JBO.23.2.026007

27 February 2018 Variable aperture-based ptychographical iterative engine method

Aihui Sun, Yan Kong, Xin Meng, Xiaoliang He, Ruijun Du, Zhilong Jiang, Fei Liu, Liang Xue, Shouyu Wang, Cheng Liu

Author Affiliations +

Journal of Biomedical Optics, Vol. 23, Issue 2, 026007 (February 2018). https://doi.org/10.1117/1.JBO.23.2.026007

Abstract

A variable aperture-based ptychographical iterative engine (vaPIE) is demonstrated both numerically and experimentally to reconstruct the sample phase and amplitude rapidly. By adjusting the size of a tiny aperture under the illumination of a parallel light beam to change the illumination on the sample step by step and recording the corresponding diffraction patterns sequentially, both the sample phase and amplitude can be faithfully reconstructed with a modified ptychographical iterative engine (PIE) algorithm. Since many fewer diffraction patterns are required than in common PIE and the shape, the size, and the position of the aperture need not to be known exactly, this proposed vaPIE method remarkably reduces the data acquisition time and makes PIE less dependent on the mechanical accuracy of the translation stage; therefore, the proposed technique can be potentially applied for various scientific researches.

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Aihui Sun, Yan Kong, Xin Meng, Xiaoliang He, Ruijun Du, Zhilong Jiang, Fei Liu, Liang Xue, Shouyu Wang, and Cheng Liu "Variable aperture-based ptychographical iterative engine method," Journal of Biomedical Optics 23(2), 026007 (27 February 2018). https://doi.org/10.1117/1.JBO.23.2.026007

Received: 6 November 2017; Accepted: 26 January 2018; Published: 27 February 2018

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KEYWORDS

Diffraction

Reconstruction algorithms

Data acquisition

Digital micromirror devices

Numerical simulations

Image quality

Imaging systems

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