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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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Added On:
01/10/2013 00:05
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