Results 71 to 80 of about 28,019 (252)

Depth enhancement of optical scanning holography with a spiral phase plate [PDF]

, 2015
A spiral phase plate is applied to the optical scanning holography system to improve the depth resolution of the reconstruction, the simulation results show that the depth interval can be resolved at a 0.4 mm with only a single hologram.
Antony Chan, Xing Sun, Edmund Y. Lam, Ren, Z, Lam, EY, Ni Chen, Zhenbo Ren, Chen, N, Chan, ACS, Sun, X   +9 more
core   +1 more source

Interstellar holography [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
The dynamic spectrum of a radio pulsar is an in-line digital hologram of the ionized interstellar medium. It has previously been demonstrated that such holograms permit image reconstruction, in the sense that one can determine an approximation to the complex electric field values as a function of Doppler shift and delay, but to date the quality of the ...
Walker, Mark A., Koopmans, Léon V. E., Stinebring, Daniel R., van Straten, W.   +3 more
openaire   +4 more sources

Holography of information in AdS/CFT

Journal of High Energy Physics, 2022
The principle of the holography of information states that in a theory of quantum gravity a copy of all the information available on a Cauchy slice is also available near the boundary of the Cauchy slice.
Robert de Mello Koch, Garreth Kemp
doaj   +1 more source

Profiling Co‐Occurrent Morphological Phenotypes and Their Degree of Expression Severity in Vacuolated Cells by Holo‐Tomographic Flow Cytometry and Fractal Analysis

Advanced Intelligent Systems, EarlyView.
HTFC gets 3D refractive index tomograms of flowing cells. Label‐free monocytes are engineered to express patterns of cytoplasmic vacuoles. From the tomogram, an efficient dimensionality reduction is operated. Interpretable features are extracted to classify the expression severity of phenotypes coexisting in each cell, visually represented by a seven ...
Marika Valentino, Giusy Giugliano, Daniele Pirone, Fabrizio Licitra, Fulvia Vitale, Pasquale Memmolo, Lisa Miccio, Massimo D’Agostino, Pietro Ferraro, Vittorio Bianco   +9 more
wiley   +1 more source

Synthesis of nano-optical elements for zero-order diffraction 3D imaging

Scientific Reports, 2022
A method is proposed to compute and synthesize a microrelief to produce a new nano-optical element for forming 3D images with full parallax at the zero order of diffraction. The synthesis of nano-optical elements requires the use of multilevel structures.
Alexander Goncharsky, Anton Goncharsky, Svyatoslav Durlevich, Dmitry Melnik   +3 more
doaj   +1 more source

Guiding and Manipulating Light Fields in Microstructured Liquid Crystals

Advanced Physics Research, EarlyView.
This review summarizes recent advances in guided‐wave optics enabled by microstructured liquid crystal (LC) devices, covering their fundamental material properties, key degree of freedom for dynamic light field manipulations. The advances of linear guided‐wave optics, nonlinear‐optics with spatial optical solitons, and microlasers in LC‐based devices ...
Shan‐shan Chang, Yong‐shuai Li, Jin‐hui Chen   +2 more
wiley   +1 more source

Edge-preserving autofocusing in digital holography

, 2016
In digital holography, it is essential to know the axial position of the recorded object for reconstruction. Here we propose an autofocusing algorithm using structure tensor to determine the focal distance and to extract the edge information ...
Edmund Lam, Ren, Z, Zhenbo Ren, Lam, EYM
core   +1 more source

Ambident Reactivity in the Phenyl + NO Radical Recombination

Chemistry – A European Journal, EarlyView.
ABSTRACT The recombination reaction of nitric oxide (NO) with radicals via its oxygen atom, rather than the more common nitrogen site, offers an intriguing pathway to the formation of oxynitrenes. The photochemical isomerization of nitroso compounds into their corresponding oxynitrenes may involve such a step.
Virinder Bhagat, Adrián Portela‐González, André K. Eckhardt, J. Philipp Wagner   +3 more
wiley   +1 more source

Unraveling Mechanisms and Engineering Strategies for Superior Photocarrier Dynamics Toward Efficient Photocatalysis

EcoEnergy, EarlyView.
Despite its potential, photocatalysis is limited by inefficient charge carrier separation and transport. This article reviews the mechanisms, characterization methods, and strategies for improvement, concluding with future challenges in the field. ABSTRACT Photocatalysis offers a promising solution to environmental and renewable energy issues. However,
Leqi Cheng, Xin Wang, Yishen Zhang, Xinrong Zhang, Jung‐Ho Yun, Songcan Wang   +5 more
wiley   +1 more source

Grid computing for the numerical reconstruction of digital holograms

, 2005
Digital holography has the potential to greatly extend holography's applications and move it from the lab into the field: a single CCD or other solid-state sensor can capture any number of holograms while numerical reconstruction within a computer ...
Nebrensky, JJ, Fryer, PC, P. R. Hobson, J. J. Nebrensky, P. C. Fryer, Hobson, PR   +5 more
core   +1 more source