Results 1 to 10 of about 6,426 (298)
Gravitational caustics in an atom laser [PDF]
Nature Communications, 2021 Previously, the study of caustics has mostly focused on experiments with light. Here, the authors demonstrate gravitational caustics and investigate catastrophe atom optics using the matter waves of an atom laser generated from a Bose-Einstein condensate.
M. E. Mossman +3 more
doaj +4 more sources
Arbitrary engineering of spatial caustics with 3D-printed metasurfaces [PDF]
Nature CommunicationsCaustics occur in diverse physical systems, spanning the nano-scale in electron microscopy to astronomical-scale in gravitational lensing. As envelopes of rays, optical caustics result in sharp edges or extended networks.
Xiaoyan Zhou +8 more
doaj +2 more sources
Ukraine and singular optics [PDF]
Nanophotonics, 2023 The mostly theoretical viewpoint, in which light is understood in terms of its singularities – caustics, phase vortices and lines of circular and linear polarisation – was developed in Bristol in the 1970s and 1980s.
Berry Michael
doaj +2 more sources
Predicting Factors of Clinical Outcomes in Patients Hospitalized after Esophageal Foreign Body or Caustic Injuries: The Experience of a Tertiary Center [PDF]
Diagnostics, 2023 Ingestion of foreign bodies (IFB) and ingestion of caustic agents are frequent non-hemorrhagic causes of endoscopic urgencies, with the potential for severe complications.
Tiago Ribeiro +4 more
doaj +2 more sources
Spiral Caustics of Vortex Beams
Photonics, 2021 We discuss the nonparaxial focusing of laser light into a three-dimensional (3D) spiral distribution. For calculating the tangential and normal components of the electromagnetic field on a preset curved surface we propose an asymptotic method, using ...
Svetlana Khonina +2 more
exaly +3 more sources
Motion After‐Effects Induced by Dynamic Illumination in Crab Vision [PDF]
Ecology and EvolutionMotion detection is an elementary aspect of most animal visual systems. However, many environments are prone to background motion, which might disrupt the ability of visual systems to detect relevant motion cues.
Christian Drerup +2 more
doaj +2 more sources
International Journal of Mathematics and Mathematical Sciences, 1986 The Lagrange manifold (WKB) formalism enables the determination of the asymptotic series solution of linear differential equations modelling wave propagation in spatially inhomogeneous media at caustic (turning) points.
Arthur D. Gorman
doaj +2 more sources
Caustics of Non-Paraxial Perfect Optical Vortices Generated by Toroidal Vortex Lenses
Photonics, 2021 In this paper, we consider the comparative formation of perfect optical vortices in the non-paraxial mode using various optical elements: non-paraxial and parabolic toroidal vortex lenses, as well as a vortex axicon in combination with a parabolic lens ...
Svetlana Khonina, Khonina Svetlana N
exaly +3 more sources
Successful treatment of corrosive esophageal atresia in a child using combined antegrade-retrograde dilation: a case report [PDF]
Frontiers in PediatricsCorrosive esophageal injury in children may rarely lead to complete atresia. No standardized treatment exists for pediatric corrosive esophageal atresia. This case demonstrates a novel minimally invasive approach.
Hao Wu +9 more
doaj +2 more sources
Caustic spot light for rendering caustics [PDF]
The Visual Computer, 2008 It is difficult to render caustic patterns at interactive frame rates. This paper introduces new rendering techniques that relax current constraints, allowing scenes with moving, non-rigid scene objects, rigid caustic objects, and rotating directional light sources to be rendered in real-time with GPU hardware acceleration.
Liu, X., Dong, Z., Bao, H., Peng, Q.
openaire +2 more sources