27 February 2018 Variable aperture-based ptychographical iterative engine method
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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.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Aihui Sun, Aihui Sun, Yan Kong, Yan Kong, Xin Meng, Xin Meng, Xiaoliang He, Xiaoliang He, Ruijun Du, Ruijun Du, Zhilong Jiang, Zhilong Jiang, Fei Liu, Fei Liu, Liang Xue, Liang Xue, Shouyu Wang, Shouyu Wang, Cheng Liu, 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 . Submission: Received: 6 November 2017; Accepted: 26 January 2018
Received: 6 November 2017; Accepted: 26 January 2018; Published: 27 February 2018

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