Results 11 to 20 of about 986,649 (268)

Two-wavelength digital holography through fog

Journal of the European Optical Society-Rapid Publications, 2023
Interferometric detection enables the acquisition of the amplitude and phase of the optical field. By making use of the synthetic wavelength as a computational construct arising from digital processing of two off-axis digital holograms, it is possible to
Gröger Alexander, Pedrini Giancarlo, Fischer Felix, Claus Daniel, Aleksenko Igor, Reichelt Stephan   +5 more
doaj   +1 more source

Coherent Imaging without Phases [PDF]

SIAM Journal on Imaging Sciences, 2016
In this paper we consider narrow band, active array imaging of weak localized scatterers when only the intensities are recorded at an array with N transducers. We consider that the medium is homogeneous and, hence, wave propagation is fully coherent.
Miguel Moscoso, Alexei Novikov, George Papanicolaou   +2 more
openaire   +3 more sources

3D Imaging Based on Depth Measurement Technologies

Sensors, 2018
Three-dimensional (3D) imaging has attracted more and more interest because of its widespread applications, especially in information and life science.
Ni Chen, Chao Zuo, Edmund Y. Lam, Byoungho Lee   +3 more
doaj   +1 more source

An algorithm of unordered wavefront propagation in terahertz phase retrieval with dense multiplane data acquisition

Компьютерная оптика, 2023
Iterative phase retrieval algorithms from multiple diffraction patterns in the terahertz (THz) frequency range are a promising tool of computational imaging capable of providing high spatial resolution of reconstructed phase images.
E.G. Tsiplakova, A. Chopard, N.S. Balbekin, O.A. Smolyanskaya, J.-B. Perraud, J.-P. Guillet, P. Mounaix, N.V. Petrov   +7 more
doaj   +1 more source

Demonstration of Neutron Phase Imaging Based on Talbot–Lau Interferometer at Compact Neutron Source RANS

Quantum Beam Science, 2022
Neutron imaging based on a compact Talbot–Lau interferometer was demonstrated using the RIKEN accelerator-driven compact neutron source (RANS). A compact Talbot–Lau interferometer consisting of gadolinium absorption gratings and a silicon phase grating ...
Hidekazu Takano, Yanlin Wu, Tetsuo Samoto, Atsushi Taketani, Takaoki Takanashi, Chihiro Iwamoto, Yoshie Otake, Atsushi Momose   +7 more
doaj   +1 more source

Two-dimensional quantitative near-field phase imaging using square and hexagonal interference devices

Nanophotonics, 2022
We demonstrate the formation of the near field with non-trivial phase distribution using surface plasmon interference devices, and experimental quantitative imaging of that phase with near-field phase microscopy.
Dvořák Petr, Klok Pavel, Kvapil Michal, Hrtoň Martin, Bouchal Petr, Krpenský Jan, Křápek Vlastimil, Šikola Tomáš   +7 more
doaj   +1 more source

EUV and Hard X-ray Hartmann Wavefront Sensing for Optical Metrology, Alignment and Phase Imaging

Sensors, 2021
For more than 15 years, Imagine Optic have developed Extreme Ultra Violet (EUV) and X-ray Hartmann wavefront sensors for metrology and imaging applications. These sensors are compatible with a wide range of X-ray sources: from synchrotrons, Free Electron
Ombeline de La Rochefoucauld, Guillaume Dovillaire, Fabrice Harms, Mourad Idir, Lei Huang, Xavier Levecq, Martin Piponnier, Philippe Zeitoun   +7 more
doaj   +1 more source

Recent Progress in X-ray and Neutron Phase Imaging with Gratings

Quantum Beam Science, 2020
Under the JST-ERATO project in progress to develop X-ray and neutron phase-imaging methods together, recent achievements have been selected and reviewed after describing the merit and the principle of the phase imaging method.
Atsushi Momose, Hidekazu Takano, Yanlin Wu, Koh Hashimoto, Tetsuo Samoto Masato Hoshino, Yoshichika Seki, Takenao Shinohara   +6 more
doaj   +1 more source

Improving Magnetic Field Response of Eddy Current Magneto-Optical Imaging for Defect Detection in Carbon Fiber Reinforced Polymers

Applied Sciences, 2023
A large number of carbon fiber reinforced polymers have been applied to aircraft and automobiles, and many nondestructive testing methods have been studied to detect their defects.
Jiangshan Ai, Quan Zhou, Xu Zhang, Shengping Li, Bing Long, Libing Bai   +5 more
doaj   +1 more source

Imaging the Premonitory Phase of Migraine [PDF]

Frontiers in Neurology, 2020
Migraine is a common and disabling brain disorder with a broad and heterogeneous phenotype, involving both pain and painless symptoms. Over recent years, more clinical and research attention has been focused toward the premonitory phase of the migraine attack, which can start up to days before the onset of head pain.
Karsan, Nazia, Goadsby, Peter J.
openaire   +4 more sources