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Title: 3D x-ray imaging of continuous objects beyond the depth of focus limit

Journal Article · · Optica

X-ray ptychography is quickly becoming the standard method for sub-30 nm imaging of thick extended samples. Being a diffraction-based technique, it involves solving an inverse problem to reconstruct the sample structure from a set of measured diffraction patterns. This problem is traditionally solved to recover a 2D representation of a sample, or in some cases a series of 2D slices of the sample; one can then do standard tomography from a set of such images as the specimen is rotated. Here we present a parallelized, optimization-based algorithm to solve the ptychographic phase retrieval problem directly in 3D. Our approach is able to deal with samples that do not fit entirely within the depth of focus of the imaging system. Such samples pose additional challenges to phase retrieval algorithms because of internal diffraction effects within the sample. In conclusion, we demonstrate our approach on a computational sample modeled with 17 million complex variables.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1467943
Alternate ID(s):
OSTI ID: 1491749
Journal Information:
Optica, Journal Name: Optica Vol. 5 Journal Issue: 9; ISSN 2334-2536
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Cited By (5)

Coupled ptychography and tomography algorithm improves reconstruction of experimental data journal January 2019
Multimodal x-ray nanotomography journal April 2020
Coupled ptychography and tomography algorithm improves reconstruction of experimental data text January 2019
Resolving 500 nm axial separation by multi-slice X-ray ptychography journal February 2019
Gridrec-MS: an algorithm for multi-slice tomography journal January 2019

Figures / Tables (6)