Results 31 to 40 of about 28,019 (252)

Robust Holographic Reconstruction by Deep Learning with One Frame

open access: yesPhotonics, 2023
A robust method is proposed to reconstruct images with only one hologram in digital holography by introducing a deep learning (DL) network. The U-net neural network is designed according to DL principles and trained by the image data set collected using ...
Xianfeng Xu   +3 more
doaj   +1 more source

Twistors and holography [PDF]

open access: yesClassical and Quantum Gravity, 2004
4 pages revtex, clarifying remarks have been added, this is the version published in Classical and Quantum ...
openaire   +2 more sources

Effect of gold nano-particles on switch-on voltage and relaxation frequency of nematic liquid crystal cell

open access: yesAIP Advances, 2011
We report the observation of large changes in the electro-optical properties of nematic liquid crystal (NLC) due to inclusion of small concentration of 10 nm diameter gold nanoparticles (GNPs).
M. Inam   +3 more
doaj   +1 more source

Holostereosynthesis: An Improvement to Louis Lumière’s Photostereosynthesis Technique

open access: yesApplied Sciences, 2022
In 1920, Louis Lumière, one of the fathers of Cinématograph, invented photostereosynthesis, a photography technique that could recreate three-dimensional images without a specific artifice.
Philippe Gentet   +2 more
doaj   +1 more source

X‐ray magnetic circular dichroism

open access: yesMajor Reference Works, Page 508-515., 2022
International Tables for Crystallography is the definitive resource and reference work for crystallography and structural science.

Each of the eight volumes in the series contains articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the ...
Gerrit van der Laan C. Chantler   +2 more
wiley  

+1 more source

Holography of Neuroradiograms

open access: yesNeurologia medico-chirurgica, 1982
Since 1975, the authors have introduced the new technology of holography for three-dimensional evaluation of neuroradiograms. In this study we holographed conventional tomograms, axial transverse tomograms, and CT scans of a dry cervical vertebralcolumn.
WATANABE, Saburo   +2 more
openaire   +3 more sources

Fourier transform holography at the wavelength limit

open access: yes, 2022
Paper DTh2E.4We present a table-top Fourier transform holography experiment that achieved a record-high resolution of 34 nm. By employing phase retrieval techniques, the resolution was improved to 23 nm (
Hilbert, V.   +12 more
core   +1 more source

Scale holography [PDF]

open access: yesThe European Physical Journal C, 2018
We present a new correspondence between a d-dimensional dynamical system and a whole family of (d+1)-dimensional systems. This new scale-holographic relation is built by the explicit introduction of a dimensionful constant which determines the size of the additional dimension.
Ruiz Cembranos, José Alberto   +2 more
openaire   +5 more sources

Topological holography [PDF]

open access: yesPhysical Review D, 1999
We study a topological field theory in four dimensions on a manifold with boundary. A bulk-boundary interaction is introduced through a novel variational principle rather than explicitly. Through this scheme we find that the boundary values of the bulk fields act as external sources for the boundary theory.
Husain, Viqar, Jaimungal, Sebastian
openaire   +2 more sources

Nanooptical elements for visual verification

open access: yesScientific Reports, 2021
This paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting.
Alexander Goncharsky   +3 more
doaj   +1 more source

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