Results 61 to 70 of about 7,202 (228)
Differential phase contrast for quantitative imaging and spectro-microscopy at a nanoprobe beamline
Journal of Synchrotron Radiation, 2023 The interaction of a focused X-ray beam with a sample in a scanning probe experiment can provide a variety of information about the interaction volume. In many scanning probe experiments X-ray fluorescence (XRF) is supplemented with measurements of the ...
Paul D. Quinn +5 more
doaj +1 more source
Ptychographic hyperspectral spectromicroscopy with an extreme ultraviolet high harmonic comb [PDF]
, 2016 We demonstrate a new scheme of spectromicroscopy in the extreme ultraviolet (EUV) spectral range, where the spectral response of the sample at different wavelengths is imaged simultaneously.
Adams, Daniel E. +9 more
core +3 more sources
Snapshot ptychography on array cameras
Optics Express, 2022 We use convolutional neural networks to recover images optically down-sampled by 6.7 × using coherent aperture synthesis over a 16 camera array. Where conventional ptychography relies on scanning and oversampling, here we apply decompressive neural estimation to recover full resolution image from a single snapshot, although as shown in simulation ...
Chengyu Wang +4 more
openaire +3 more sources
Ptychography by changing the area of probe light and scaled ptychography
, 2014 Ptychography is a promising phase retrieval technique for visible light, X-ray and electron beams. Conventional ptychography reconstructs the amplitude and phase of an object light from a set of the diffraction intensity patterns obtained by the X-Y ...
Endo, Yutaka +6 more
core +1 more source
Time-Domain Ptychography [PDF]
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2019 Diffraction imaging is a widely used concept in lens-less imaging. The key challenge is to reconstruct the phase of diffracted waves, and several solutions to this so-called phase problem have been published. One of the most robust techniques is ptychography.
Thomas Feurer +5 more
openaire +3 more sources
Analyzer-free linear dichroic ptychography [PDF]
Journal of Applied Crystallography, 2020 Linear dichroism is an important tool to characterize the transmission matrix and determine the crystal or orbital orientation in a material. In order to achieve high-resolution mapping of transmission properties, the linear-dichroism scattering model in ptychographic imaging is introduced, and an efficient two-stage reconstruction algorithm is ...
Huibin Chang +2 more
openaire +3 more sources
Automatic parameter selection for electron ptychography via Bayesian optimization
Scientific Reports, 2022 Electron ptychography provides new opportunities to resolve atomic structures with deep sub-angstrom spatial resolution and to study electron-beam sensitive materials with high dose efficiency. In practice, obtaining accurate ptychography images requires
Michael C. Cao +3 more
doaj +1 more source
Lensless Imaging via Blind Ptychography Modulation and Wavefront Separation
Photonics, 2023 A novel lensless imaging approach based on ptychography and wavefront separation is proposed in this paper, which was characterized by rapid convergence and high-quality imaging.
Cheng Xu +5 more
doaj +1 more source
, 2019 Digital aberration measurement and removal play a prominent role in computational imaging platforms aimed at achieving simple and compact optical arrangements.
Huang, Xizhi +5 more
core +1 more source
Microscopy and MicroanalysisAbstract We demonstrate live-updating ptychographic reconstruction with the extended ptychographical iterative engine, an iterative ptychography method, during ongoing data acquisition. The reconstruction starts with a small subset of the total data, and as the acquisition proceeds the data used for reconstruction are extended.
Weber, Dieter +8 more
openaire +6 more sources