• Advanced Photonics
  • Vol. 1, Issue 1, 016005 (2019)
Xingyuan Lu1, Yifeng Shao2, Chengliang Zhao1、2、*, Sander Konijnenberg2, Xinlei Zhu1, Ying Tang2, Yangjian Cai1、3, and H. Paul Urbach2
Author Affiliations
  • 1Soochow University, School of Physical Science and Technology, Suzhou, China
  • 2Delft University of Technology, Optics Research Group, Delft, Netherlands
  • 3Shandong Normal University, School of Physics and Electronics, Center of Light Manipulation and Application, Jinan, China
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    We propose and experimentally demonstrate a noniterative diffractive imaging method for reconstructing the complex-valued transmission function of an object illuminated by spatially partially coherent light from the far-field diffraction pattern. Our method is based on a pinhole array mask, which is specially designed such that the correlation function in the mask plane can be obtained directly by inverse Fourier transforming the diffraction pattern. Compared to the traditional iterative diffractive imaging methods using spatially partially coherent illumination, our method is noniterative and robust to the degradation of the spatial coherence of the illumination. In addition to diffractive imaging, the proposed method can also be applied to spatial coherence property characterization, e.g., free-space optical communication and optical coherence singularity measurement.

    1 Introduction

    Coherent diffractive imaging (CDI) is an important tool for reconstructing the complex-valued transmission function of an object from the far-field diffraction pattern and has been widely applied in material and biological sciences.1,2 Miao et al.3 first experimentally realized imaging of submicrometer sized noncrystalline specimen using CDI. Many CDI approaches have been developed in the past decades; they can be divided into two types: the iterative methods49 and the noniterative methods.1014 However, most of the traditional CDI methods cannot be directly applied to using spatially partially coherent illumination without a proper modification, which hence have limited applications at short wavelengths, e.g., in the x-ray and electron regime, or in the unstable experimental environment. For example, the degradation of the spatial coherence may also be caused by the mechanical movement of the sample and the experimental setup, or by the fluctuation of the ambient medium, e.g., atmospheric turbulence.1517

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    Xingyuan Lu, Yifeng Shao, Chengliang Zhao, Sander Konijnenberg, Xinlei Zhu, Ying Tang, Yangjian Cai, H. Paul Urbach. Noniterative spatially partially coherent diffractive imaging using pinhole array mask[J]. Advanced Photonics, 2019, 1(1): 016005
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    Category: Research Articles
    Received: Jun. 22, 2018
    Accepted: Nov. 8, 2018
    Published Online: Feb. 18, 2019
    The Author Email: Zhao Chengliang (zhaochengliang@suda.edu.cn)