Results 81 to 90 of about 1,387 (173)

Electron Ptychography

Electron ptychography describes a family of algorithms which are used to enable the reconstruction of complex specimen transmission functions of a sample in order to obtain both phase and amplitude information, as applied within the realms of electron microscopy.
Clark, L., Nellist, P. D.
openaire   +3 more sources

Ptychography with multiple wavelength illumination

Optics Express, 2019
For performing phase retrieval in the extreme ultraviolet (EUV) regime more efficiently, developing polychromatic ptychography is desirable. As an alternative to the existing ptychographic information multiplexing (PIM) method, we present an another scheme where all monochromatic exit waves are expressed in terms of the amplitude of the transmission ...
Xukang Wei, Paul Urbach
openaire   +4 more sources

Fresnel coherent diffractive imaging tomography of whole cells in capillaries

New Journal of Physics, 2014
X-ray tomography can be used to study the structure of whole cells in close to their native state. Ptychographic Fresnel coherent diffractive imaging (FCDI) holds particular promise for high-resolution tomographic imaging with quantitative phase ...
Mac B Luu, Grant A van Riessen, Brian Abbey, Michael W M Jones, Nicholas W Phillips, Kirstin Elgass, Mark D Junker, David J Vine, Ian McNulty, Guido Cadenazzi, Coralie Millet, Leann Tilley, Keith A Nugent, Andrew G Peele   +13 more
doaj   +1 more source

Diffraction tomography with Fourier ptychography

Optica, 2016
This paper presents a technique to image the complex index of refraction of a sample across three dimensions. The only required hardware is a standard microscope and an array of LEDs. The method, termed Fourier ptychographic tomography (FPT), first captures a sequence of intensity-only images of a sample under angularly varying illumination.
Horstmeyer, Roarke, Chung, Jaebum, Ou, Xiaoze, Zheng, Guoan, Yang, Changhuei   +4 more
openaire   +4 more sources

Near-field ptychography using lateral and longitudinal shifts

New Journal of Physics, 2015
Image reconstruction of in-line holography depends crucially on the probing wave front used to illuminate an object. Aberrations inherent to the illumination can mix with the features imposed by the object.
A-L Robisch, K Kröger, A Rack, T Salditt   +3 more
doaj   +1 more source

Simulation Study of Low-Dose 4D-STEM Phase Contrast Techniques at the Nanoscale in SEM

Nanomaterials
Phase contrast imaging is well-suited for studying weakly scattering samples. Its strength lies in its ability to measure how the phase of the electron beam is affected by the sample, even when other imaging techniques yield low contrast.
Zvonimír Jílek, Tomáš Radlička, Vladislav Krzyžánek   +2 more
doaj   +1 more source

Three-dimensional polarimetric ptychography

Optics Express
A three-dimensional polarimetric ptychography (3D-PP) technique is proposed to reconstruct the residual stress distribution in optical elements in three dimensions by combining polarization imaging and a 3D ptychographic iterative engine (3D-PIE).
Chengcheng Chang, Hua Tao, Tonglu Xing, Qiang Lin, Huiling Huang, Liqing Wu, Xiaoliang He, Guowen Zhang, Cheng Liu, Jianqiang Zhu   +9 more
openaire   +2 more sources

A distributed software system for integrating data-intensive imaging methods in a hard X-ray nanoprobe beamline at the SSRF

Journal of Synchrotron Radiation
The development of hard X-ray nanoprobe techniques has given rise to a number of experimental methods, like nano-XAS, nano-XRD, nano-XRF, ptychography and tomography. Each method has its own unique data processing algorithms.
Peicheng Zhang, Zhisen Jiang, Yan He, Aiguo Li   +3 more
doaj   +1 more source

Annulus fracture underlies radiation-induced sperm dysfunction revealed by multimodal nano-imaging. [PDF]

Life Sci Alliance
Chen N, Chen H, Xiao J, He B, Zhang D, Yuan X, Wen P, Jiang H.   +7 more
europepmc   +1 more source

Insights into Native Single-Atom Electrocatalyst Site Structures. [PDF]

ACS Nano
Zachman MJ, Hafiz H, O'Leary CM, Lim C, Chung DY, Li S, Park S, Kim J, Cullen DA, Holby EF, Stamenkovic VR.   +10 more
europepmc   +1 more source