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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 10 — May. 19, 2014
  • pp: 12634–12644

Optimization of overlap uniformness for ptychography

Xiaojing Huang, Hanfei Yan, Ross Harder, Yeukuang Hwu, Ian K. Robinson, and Yong S. Chu  »View Author Affiliations

Optics Express, Vol. 22, Issue 10, pp. 12634-12644 (2014)

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We demonstrate the advantages of imaging with ptychography scans that follow a Fermat spiral trajectory. This scan pattern provides a more uniform coverage and a higher overlap ratio with the same number of scan points over the same area than the presently used mesh and concentric [13] patterns. Under realistically imperfect measurement conditions, numerical simulations show that the quality of the reconstructed image is improved significantly with a Fermat spiral compared with a concentric scan pattern. The result is confirmed by the performance enhancement with experimental data, especially under low-overlap conditions. These results suggest that the Fermat spiral pattern increases the quality of the reconstructed image and tolerance to data with imperfections.

© 2014 Optical Society of America

OCIS Codes
(100.5070) Image processing : Phase retrieval
(340.0340) X-ray optics : X-ray optics
(110.3010) Imaging systems : Image reconstruction techniques

ToC Category:
Image Processing

Original Manuscript: March 20, 2014
Revised Manuscript: May 6, 2014
Manuscript Accepted: May 7, 2014
Published: May 16, 2014

Virtual Issues
Vol. 9, Iss. 7 Virtual Journal for Biomedical Optics

Xiaojing Huang, Hanfei Yan, Ross Harder, Yeukuang Hwu, Ian K. Robinson, and Yong S. Chu, "Optimization of overlap uniformness for ptychography," Opt. Express 22, 12634-12644 (2014)

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