Journal
CHINESE PHYSICS B
Volume 22, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/22/1/014204
Keywords
phase retrieval algorithm; coherent diffractive imaging; ptychography
Categories
Funding
- National Natural Science Foundation of China [11179009, 50875013]
- Beijing Municipal Natural Science Foundation, China [4102036]
- Beijing NOVA Program, China [2009A09]
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Coherent diffractive imaging (CDI) is a lensless imaging technique and can achieve a resolution beyond the Rayleigh or Abbe limit. The ptychographical iterative engine (PIE) is a CDI phase retrieval algorithm that uses multiple diffraction patterns obtained through the scan of a localized illumination on the specimen, which has been demonstrated successfully at optical and X-ray wavelengths. In this paper, a general PIE algorithm (gPIE) is presented and demonstrated with an He-Ne laser light diffraction dataset. This algorithm not only permits the removal of the accurate model of the illumination function in PIE, but also provides improved convergence speed and retrieval quality.
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