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Title: Continuous motion scan ptychography: Characterization for increased speed in coherent x-ray imaging

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/OE.23.005438· OSTI ID:1190779
 [1];  [2];  [2];  [3];  [2];  [2];  [2];  [4];  [2]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. La Trobe Univ. (Australia); CSIRO Manufacturing Flagship, Victoria (Australia)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)

Ptychography is a coherent diffraction imaging (CDI) method for extended objects in which diffraction patterns are acquired sequentially from overlapping coherent illumination spots. The object’s complex transmission function can be reconstructed from those diffraction patterns at a spatial resolution limited only by the scattering strength of the object and the detector geometry. Most experiments to date have positioned the illumination spots on the sample using a move-settle-measure sequence in which the move and settle steps can take longer to complete than the measure step. We describe here the use of a continuous “fly-scan” mode for ptychographic data collection in which the sample is moved continuously, so that the experiment resembles one of integrating the diffraction patterns from multiple probe positions. This allows one to use multiple probe mode reconstruction methods to obtain an image of the object and also of the illumination function. We show in simulations, and in x-ray imaging experiments, some of the characteristics of fly-scan ptychography, including a factor of 25 reduction in the data acquisition time. This approach will become increasingly important as brighter x-ray sources are developed, such as diffraction limited storage rings.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357; 1S10RR029272-01; 1R01GM104530
OSTI ID:
1190779
Journal Information:
Optics Express, Vol. 23, Issue 5; ISSN 1094-4087
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 74 works
Citation information provided by
Web of Science

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Cited By (18)

X-ray Microscopy book January 2019
X-ray ptychography journal December 2017
X-ray ptychographic and fluorescence microscopy of frozen-hydrated cells using continuous scanning journal March 2017
OMNY—A tOMography Nano crYo stage journal April 2018
X-ray ptychography on low-dimensional hard-condensed matter materials journal March 2019
The Velociprobe: An ultrafast hard X-ray nanoprobe for high-resolution ptychographic imaging journal August 2019
Multimodal hard x-ray imaging with resolution approaching 10 nm for studies in material science journal March 2018
A computational framework for ptychographic reconstructions journal December 2016
Multiscale X-ray imaging using ptychography journal June 2018
Resolving 500 nm axial separation by multi-slice X-ray ptychography journal February 2019
Aberration correction for hard x-ray focusing at the nanoscale conference September 2017
Perspective: Towards single shot time-resolved microscopy using short wavelength table-top light sources text January 2019
Coupled ptychography and tomography algorithm improves reconstruction of experimental data text January 2019
Aberration correction for hard x-ray focusing at the nanoscale text January 2017
Perspective: Towards single shot time-resolved microscopy using short wavelength table-top light sources journal January 2019
X-ray ptychography journal August 2011
OMNY - A tOMography Nano crYo stage text January 2018
X-ray microscopy journal July 1965

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