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Publication Detail
Propagation uniqueness in three-dimensional coherent diffractive imaging
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Huang XJ, Harder R, Xiong G, Shi XW, Robinson I
  • Publisher:
    AMER PHYSICAL SOC
  • Publication date:
    24/06/2011
  • Journal:
    PHYS REV B
  • Volume:
    83
  • Issue:
    22
  • Print ISSN:
    1098-0121
  • Language:
    EN
  • Keywords:
    X-RAY-DIFFRACTION, PHASE RETRIEVAL, MICROSCOPY, ALGORITHMS, NANOSCALE, MAGNITUDE, STRAIN, FIELD, WHOLE
  • Addresses:
    Huang, XJ
    UCL
    London Ctr Nanotechnol
    London
    WC1H 0AH
    England

    Res Complex Harwell
    Didcot
    OX11 0DE
    Oxon
    England
Abstract
Propagation nonuniqueness in three-dimensional (3D) coherent diffractive imaging (CDI) arises from the fact that an ensemble of solutions, related by propagation, gives an identical far-field diffraction intensity. Tight support constraint and tight allowed phase range behave similarly in constraining the solution of phase retrieval process, thus removing this nonuniqueness in simple cases but not for strong-phase objects. For CDI in Bragg geometry, we introduce a two-step phasing procedure for reconstructing heavily-strained samples that balances the need to define both support and phase constraints.
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