Translation position determination in ptychographic coherent diffraction imaging

DOI: 10.1364/OE.21.013592
PMID: 23736612

Authors: Fucai Zhang (University College London) , Isaac Peterson , Joan Vila-comamala (Diamond Light Source) , Felisa Berenguer (London Centre of Nanotechnology) , Richard Bean (London Centre of Nanotechnology) , Bo Chen , Andreas Menzel , Ian Robinson (RCaH, UCL) , John Rodenburg (University of Sheffield)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Optics Express , VOL 21 (11)

State: Published (Approved)
Published: June 2013

Abstract: Accurate knowledge of translation positions is essential in ptychography to achieve a good image quality and the diffraction limited resolution. We propose a method to retrieve and correct position errors during the image reconstruction iterations. Sub-pixel position accuracy after refinement is shown to be achievable within several tens of iterations. Simulation and experimental results for both optical and X-ray wavelengths are given. The method improves both the quality of the retrieved object image and relaxes the position accuracy requirement while acquiring the diffraction patterns.

Subject Areas: Technique Development


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