Results 21 to 30 of about 103,433 (302)

Ghost Images in Helioseismic Holography? Toy Models in a Uniform Medium [PDF]

open access: yes, 2018
Helioseismic holography is a powerful technique used to probe the solar interior based on estimations of the 3D wavefield. Porter--Bojarski holography, which is a well-established method used in acoustics to recover sources and scatterers in 3D, is also ...
Yang, Dan
core   +2 more sources

Synthesis and characterization of ZnO thin film by low cost modified SILAR technique

open access: yesAIMS Materials Science, 2016
The ZnO thin film is prepared on Fluorine Tin Oxide (FTO) coated glass substrate by using SILAR deposition technique containing ZnSO4.7H2O and NaOH as precursor solution with 150 deeping cycles at 70 °C temperature.
Haridas D. Dhaygude   +4 more
doaj   +1 more source

Surface-Plasmon Holography

open access: yesiScience, 2020
Summary: Holography was originally invented for the purpose of magnifying electron microscopic images without spherical aberration and has been applied to photography for recording and reconstructing three-dimensional objects.
Satoshi Kawata, Miyu Ozaki
doaj   +1 more source

Holographic Protection of Chronology in Universes of the Godel Type [PDF]

open access: yes, 2002
We analyze the structure of supersymmetric Godel-like cosmological solutions of string theory. Just as the original four-dimensional Godel universe, these solutions represent rotating, topologically trivial cosmologies with a homogeneous metric and ...
A. A. Tseytlin   +30 more
core   +2 more sources

Color Holography for the Documentation and Dissemination of Cultural Heritage: OptoClonesTM from Four Museums in Two Countries

open access: yesJournal of Imaging, 2019
True-color holograms, as they are the most advanced and realistic three-dimensional images obtainable with current technologies, can become valuable tools for the preservation, documentation and diffusion of cultural heritage.
Andreas Sarakinos, Alkis Lembessis
doaj   +1 more source

Applications of X-Ray Holography

open access: yesInternational Journal of Optics, 2021
X-ray holography is widely used in material, biology, and industry fields due to its potential to measure the microstructure and dynamic change of objects.
Bingjun Shi, Yuan Fu, Yan Yang
doaj   +1 more source

Holography in the invisible. From the thermal infrared to the terahertz waves: outstanding applications and fundamental limits

open access: yesLight: Advanced Manufacturing, 2022
Since its invention, holography has been mostly applied at visible wavelengths in a variety of applications. Specifically, non-destructive testing of manufactured objects was a driver for developing holographic methods and all related ones based on the ...
Marc Georges   +2 more
doaj   +1 more source

Absorbing new subjects: holography as an analog of photography [PDF]

open access: yes, 2006
I discuss the early history of holography and explore how perceptions, applications, and forecasts of the subject were shaped by prior experience. I focus on the work of Dennis Gabor (1900–1979) in England,Yury N. Denisyuk (1927-2005) in the Soviet Union,
Johnston, Sean F.
core   +2 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

Recent advances in multi-dimensional metasurfaces holographic technologies

open access: yesPhotoniX, 2020
Holography has attracted tremendous interest due to its capability of storing both the amplitude and phase of light field and reproducing vivid three-dimensional scenes. However, the large pixel size, low resolution, small field-of-view (FOV) and limited
Ruizhe Zhao   +2 more
doaj   +1 more source

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