Results 181 to 190 of about 3,149 (205)

Ptychography with multilayer Laue lenses

Journal of Synchrotron Radiation, 2014
Two different multilayer Laue lens designs were made with total deposition thicknesses of 48 µm and 53 µm, and focal lengths of 20.0 mm and 12.5 mm at 20.0 keV, respectively. From these two multilayer systems, several lenses were manufactured for one- and two-dimensional focusing.
Adam Kubec, Stefan Braun, Sven Niese
exaly   +4 more sources

Subsampled STEM-ptychography [PDF]

Applied Physics Letters, 2018
Ptychography has been shown to be an efficient phase contrast imaging technique for scanning transmission electron microscopes (STEM). STEM-ptychography uses a fast pixelated detector to collect a "4-dimensional" dataset consisting of a 2D electron ...
Andrew Stevens, Lewys Jones, Colin Ophus   +2 more
exaly   +2 more sources

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Multiplexed Single-Shot Ptychography

Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), 2018
We demonstrate experimentally multiplexed single-shot ptychography. Specifically, we present a polarization-resolved single-shot ptychographic microscope, where the orthogonally polarized amplitudes and phases of a polarization-sensitive object are reconstructed from ptychographic data recorded in a single camera exposure.
Bing Kuan, Chen, Pavel, Sidorenko, Oren, Lahav, Or, Peleg, Oren, Cohen   +4 more
openaire   +2 more sources

Single-shot ptychography & sparsity-based subwavelength ptychography

Frontiers in Optics 2015, 2015
We overcome two major limitations in ptychography - a powerful scanning coherent diffraction imaging technique. We demonstrate single-shot ptychography, overcoming the scanning temporal resolution limit and demonstrate sparsity-based subwavelength ptychography, overcoming the Abbe resolution limit.
Pavel Sidorenko, Edouard Pauwels, Shoham Sabach, Yonina C. Eldar, Mordechai Segev, Oren Cohen   +5 more
openaire   +1 more source

Superresolution imaging via ptychography

Journal of the Optical Society of America A, 2011
Coherent diffractive imaging of objects is made considerably more practicable by using ptychography, where a set of diffraction patterns replaces a single measurement and introduces a high degree of redundancy into the recorded data. Here we demonstrate that this redundancy allows diffraction patterns to be extrapolated beyond the aperture of the ...
Andrew M, Maiden, Martin J, Humphry, Fucai, Zhang, John M, Rodenburg   +3 more
openaire   +2 more sources

Polychromatic near-field ptychography

2016 International Conference on Image and Vision Computing New Zealand (IVCNZ), 2016
Near-field X-ray ptychography has recently been experimentally shown to be able to recover a sample's complex valued transmission function from multiple near-field diffraction images, each with a lateral shift of the sample, in the monochromatic (single energy) case.
Richard Clare, Martin Dierolf, Irene Zanette   +2 more
openaire   +1 more source

A Framework for Ptychography

Imaging and Applied Optics 2016, 2016
We present a description of ptychography in terms of Gabor’s notion of decomposition into elementary signals and the concept of frames.
openaire   +1 more source

Improved Three-Dimensional Reconstructions in Electron Ptychography through Defocus Series Measurements [PDF]

Microscopy and Microanalysis
A detailed analysis of ptychography for three-dimensional (3D) phase reconstructions of thick specimens is performed. We introduce multi-focus ptychography, which incorporates a 4D-STEM defocus series to enhance the quality of 3D reconstructions along ...
Marcel Schloz, Hamish G Brown, Kenji Watanabe   +2 more
exaly   +2 more sources

A Methodology for Robust Multislice Ptychography

Microscopy and Microanalysis
Abstract While multislice electron ptychography can provide thermal vibration limited resolution and structural information in 3D, it relies on properly selecting many intertwined acquisition and computational parameters. Here, we outline a methodology for selecting acquisition parameters to enable robust ptychographic reconstructions ...
Colin Gilgenbach, Xi Chen, James M LeBeau   +2 more
openaire   +2 more sources

Review of development for ptychography algorithm

Wuli Xuebao/Acta Physica Sinica, 2023
Pan Xin-Yu
exaly