Results 1 to 10 of about 142,647 (295)
A smooth introduction to the wavefront set [PDF]
Journal of Physics A: Mathematical and Theoretical, 2014 The wavefront set provides a precise description of the singularities of a distribution. Because of its ability to control the product of distributions, the wavefront set was a key element of recent progress in renormalized quantum field theory in curved
Alinhac S +40 more
core +9 more sources
On the ray-wavefront duality [PDF]
Symmetry 14, 478 (2022), 2022 We investigate the behavior of the solutions of the ray equation in isotropic media. We discuss local and global transversals and wavefronts and give examples of rays without wavefronts.
Antonio Díaz-Cano +2 more
arxiv +5 more sources
The wavefront phenomenon of ischemic cell death. 1. Myocardial infarct size vs duration of coronary occlusion in dogs. [PDF]
Circulation, 1977 Irreversible ischemic myocardial cell injury develops in an increasing number of cells as the duration of coronary occlusion is prolonged. The present study quantitates myocardial necrosis produced by 40 minutes, 3 hours, or 6 hours of temporary ...
K A Reimer +3 more
openalex +2 more sources
An all-photonic focal-plane wavefront sensor [PDF]
Nature Communications, 2020 Adaptive optics wavefront sensors need to be in a pupil plane and are insensitive to certain wavefront-error modes. The authors present a wavefront sensor based on a photonic lantern fibre-mode-converter and deep learning, which can be placed at the same
Barnaby R. M. Norris +4 more
doaj +2 more sources
Ground-layer wavefront reconstruction from multiple natural guide stars [PDF]
Astrophys.J.661:1332-1338,2007, 2007 Observational tests of ground layer wavefront recovery have been made in open loop using a constellation of four natural guide stars at the 1.55 m Kuiper telescope in Arizona.
Athey A. +17 more
core +4 more sources
Compressive Wavefront Sensing with Weak Values [PDF]
, 2014 We demonstrate a wavefront sensor based on the compressive sensing, single-pixel camera. Using a high-resolution spatial light modulator (SLM) as a variable waveplate, we weakly couple an optical field's transverse-position and polarization degrees of ...
Howell, John C. +2 more
core +4 more sources
High Sensitivity Wavefront Sensing with a non-linear Curvature Wavefront Sensor [PDF]
Publications of the Astronomical Society of the Pacific, 2009 A new wavefront sensing approach, derived from the successful curvature wavefront sensing concept but using a non-linear phase retrieval wavefront reconstruction scheme, is described. The non-linear curvature wavefront sensor (nlCWFS) approaches the theoretical sensitivity limit imposed by fundamental physics by taking full advantage of wavefront ...
arxiv +6 more sources
Feedback-based wavefront shaping [PDF]
Optics Express, 2015 Light scattering was thought to be the fundamental limitation for the depth at which optical imaging methods can retain their resolution and sensitivity. However, it was shown that light can be focused inside even the most strongly scattering objects by spatially shaping the wavefront of the incident light.
I. Vellekoop
openaire +5 more sources
Roadmap on wavefront shaping and deep imaging in complex media [PDF]
Journal of Physics: Photonics, 2021 The last decade has seen the development of a wide set of tools, such as wavefront shaping, computational or fundamental methods, that allow us to understand and control light propagation in a complex medium, such as biological tissues or multimode ...
S. Gigan +44 more
semanticscholar +1 more source
Multifunctional resonant wavefront-shaping meta-optics based on multilayer and multi-perturbation nonlocal metasurfaces [PDF]
Light: Science & Applications, 2020 Photonic devices rarely provide both elaborate spatial control and sharp spectral control over an incoming wavefront. In optical metasurfaces, for example, the localized modes of individual meta-units govern the wavefront shape over a broad bandwidth ...
Stephanie C. Malek +3 more
semanticscholar +1 more source