20-21 November 2014
National Centre for Synchrotron Science
Australia/Melbourne timezone
Save the date: User Meeting 2015 - 26-27 November

Developments in Partially Coherent Ptychography

20 Nov 2014, 17:30
1h 30m
NCSS Exhibition Area ()

NCSS Exhibition Area

Australian Synchrotron 800 Blackburn Road Clayton VIC 3168
Board: 601


Mr Guido Cadenazzi (La Trobe University)


Ptychography has rapidly developed into a widespread technique for high-resolution X-ray microscopy due to improvements in image quality and the added flexibility over conventional Coherent Diffractive Imaging (CDI) techniques. These benefits are achieved via scanning the sample across a finite incident beam such that overlapping regions reinforce the solution for the sample transmission function in the diffraction data. Recent developments in position correction algorithms ameliorate the problems associated with sample stage drift and hysterises during image acquisition and reduce drift artefacts. Nevertheless, its application to table-top sources has been less rapid due to their limited coherent flux. Such an extension is vital if diffraction microscopy is to become a widespread and routine imaging modality. In this talk, we present recent results of ptychographic diffractive imaging using partial spatial and temporal coherence and suggest a new condition for the optimal overlap parameter when imaging using partially coherent radiation. This has important implications for users wishing to apply ptychography to conventional sources that may not meet the stringent coherence requirements for conventional diffractive imaging.
Keywords or phrases (comma separated) ptychography, coherent diffractive imaging, partial coherence, overlap parameter

Primary author

Mr Guido Cadenazzi (La Trobe University)


Dr Bo Chen (La Trobe University) Prof. Brian Abbey (La Trobe University) Dr Grant van Riessen (La Trobe University) Prof. Keith Nugent (La Trobe University)

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