Results 11 to 20 of about 12,318 (243)
Angular-multiplexed multichannel optical vortex arrays generators based on geometric metasurface
iScience, 2021 Summary: Recently, metasurface-based multichannel optical vortex arrays have attracted considerable interests due to its promising applications in high-dimensional information storage and high-secure information encryption.
Jinjin Jin +7 more
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Компьютерная оптика, 2022 We develop a method for calculating the eikonal function (or the phase function) of the light field, ensuring the formation of a prescribed irradiance distribution in the geometrical optics approximation.
L.L. Doskolovich +4 more
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X-ray propagation through a kinoform lens
Journal of Synchrotron Radiation, 2022 Combining geometric ray tracing and wave optics propagation, a new simulation model named LWF is established to calculate the full coherent X-ray propagation through a kinoform lens. The LWF model is used to analyze the X-ray propagation through long and
Weihong Sun +6 more
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The singularities of light: intensity, phase, polarisation
Light: Science & Applications, 2023 In modern optics, light can be described at different levels: as rays, as scalar waves, as vector fields, and as quantum fields. In the first three levels, there are singularities—characteristic features, useful in interpreting phenomena at that level ...
Michael V. Berry
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Two approaches to the problem of ray seismic tomography
Геофизический журнал, 2015 Approximation of nonlinear geophysical medium as a linear one substantiates a transition to geometrical seismics based on geometric optics. Conditions, necessary and sufficient for application of geometrical optics bring possibility of linearization ...
T.A. Tsvetkova
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Journal of Synchrotron Radiation, 2022 A new algorithm to perform coherent mode decomposition of undulator radiation is proposed. It is based on separating the horizontal and vertical directions, reducing the problem by working with one-dimension wavefronts.
Manuel Sanchez del Rio +4 more
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Invisibility cloaking based on geometrical optics for visible light [PDF]
Journal of the European Optical Society-Rapid Publications, 2013 Optical cloaking has been one of unattainable dreams and just a subject in fiction until recently. Several different approaches to cloaking have been proposed and demonstrated: stealth technology, active camouflage and transformation optics. The last one
Ichikawa H., Oura M., Taoda T.
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Bessel Beam Diffraction by an Aperture in an Opaque Screen
International Journal of Optics, 2015 The scattering of the Bessel beam by a circular aperture in an opaque screen is investigated by the geometrical theory of diffraction approach. The geometrical optics and diffracted and scattered fields are obtained.
Husnu Deniz Basdemir
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Depth-of-field effects in wiggler radiation sources: Geometrical versus wave optics
Physical Review Accelerators and Beams, 2017 A detailed analysis is carried out of the optical properties of synchrotron radiation emitted by multipole wigglers, concentrating on the effective source size and brightness and the so-called “depth of field” effects, concerning which there has been ...
Richard P. Walker
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Geometrical optics method in the theory of channeling of high energy particles in crystals
Physics Letters B, 2019 The process of scattering of fast charged particles in thin crystals is considered in the transitional range of thicknesses, between those at which the channeling phenomenon is not developed and those at which it is realized.
N.F. Shul'ga, S.N. Shulga
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