Results 21 to 30 of about 99,918 (270)

Conoscopic holography [PDF]

open access: yesOptics Letters, 1985
A new method for recording holograms using incoherent light is described. The method is based on optical propagation through birefringent crystals. Optical methods for the reconstruction of such a hologram are also presented.
Sirat, Gabriel, Psaltis, Demetri
openaire   +4 more sources

Turbulence and holography [PDF]

open access: yesClassical and Quantum Gravity, 2008
We examine the interplay between recent advances in quantum gravity and the problem of turbulence. In particular, we argue that in the gravitational context the phenomenon of turbulence is intimately related to the properties of spacetime foam. In this framework we discuss the relation of turbulence and holography and the interpretation of the ...
Vishnu Jejjala   +3 more
openaire   +3 more sources

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

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

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

Polarization fields in GaN/AlN nanowire heterostructures studied by Off axis holography [PDF]

open access: yes, 2013
In this work, we present an off-axis holography study of GaN/AlN heterostructured nanowires grown by plasma-assisted molecular-beam epitaxy. We discuss the sample preparation of nanowire samples for electron holography and combine potential profiles ...
Hertog, Martien Den   +2 more
core   +4 more sources

Monopoles and holography [PDF]

open access: yesJournal of High Energy Physics, 2011
We present a holographic theory in AdS_4 whose zero temperature ground state develops a crystal structure, spontaneously breaking translational symmetry. The crystal is induced by a background magnetic field, but requires no chemical potential. This lattice arises from the existence of 't Hooft-Polyakov monopole solitons in the bulk which condense to ...
Bolognesi, S., Tong, D.
openaire   +3 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

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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