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Publication Detail
Phase retrieval through a one–dimensional ptychographic engine
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Vittoria FA, Diemoz PC, Endrizzi M, De Caro L, Wagner UH, Rau C, Robinson IK, Olivo A
  • Publisher:
    OSA
  • Publication date:
    09/07/2014
  • Place of publication:
    USA
  • Pagination:
    17281, 17291
  • Journal:
    Optics Express
  • Volume:
    22
  • Issue:
    14
  • Status:
    Published
  • Country:
    USA
  • Print ISSN:
    1559-128X
  • Language:
    English
  • Keywords:
    Phase retrieval, Coherence imaging, X-ray microscopy
Abstract
Ptychographic techniques are currently the subject of increasing scientific interest due to their capability to retrieve the complex transmission function of an object at very high resolution. However, they impose a substantial burden in terms of acquisition time and dimension of the scanned area, which limits the range of samples that can be studied. We have developed a new method that combines the ptychographic approach in one direction with Fresnel propagation in the other by employing a strongly asymmetric probe. This enables scanning the sample in one direction only, substantially reducing exposure times while covering a large field of view. This approach sacrifices ptychographic–related resolution in one direction, but removes any limitation on the probe dimension in the direction orthogonal to the scanning, enabling the scan of relatively large objects without compromising exposure times.
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Dept of Med Phys & Biomedical Eng
Author
London Centre for Nanotechnology
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