Results 21 to 30 of about 109,137 (327)

The wavefront of the radio signal emitted by cosmic ray air showers [PDF]

, 2014
Analyzing measurements of the LOPES antenna array together with corresponding CoREAS simulations for more than 300 measured events with energy above $10^{17}\,$eV and zenith angles smaller than $45^\circ$, we find that the radio wavefront of cosmic-ray ...
Apel, W. D., Arteaga-Velázquez, J. C., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Bähren, L., Cantoni, E., Chiavassa, A., Daumiller, K., De Souza, V., Doll, P., Engel, R., Falcke, H., Fuchs, B., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Horneffer, A., Huber, D., Huege, T., Hörandel, J. R., Isar, P. G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Link, K., LOPES Collaboration, Ludwig, M., Mathes, H. J., Melissas, M., Morello, C., Oehlschläger, J., Palmieri, N., Pierog, T., Pierro, F. D., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schoo, S., Schröder, F. G., Sima, O., Toma, G., Trinchero, G. C., Uczak, P., Weindl, A., Wochele, J., Zabierowski, J., Zensus, J. A.   +56 more
core   +3 more sources

Optical Aberrations and Wavefront

Türk Oftalmoloji Dergisi, 2014
The deviation of light to create normal retinal image in the optical system is called aberration. Aberrations are divided two subgroup: low-order aberrations (defocus: spherical and cylindrical refractive errors) and high-order aberrations (coma ...
Nihat Polat, Esra Yelkenci Aydın, İbrahim Tuncer   +2 more
doaj   +1 more source

Quasi-static aberrations induced by laser guide stars in adaptive optics [PDF]

, 2006
Laser Guide Star Adaptive Optics (LGS AO) systems use the return from an artificial guide star to measure the wavefront aberrations in the direction of the science object.
Bouchez, Antonin H., Le Mignant, David, van Dam, Marcos A., Wizinowich, Peter L.   +3 more
core   +1 more source

Wavefront aberrations in children with myopia and hyperopia before and after cycloplegia

Российский офтальмологический журнал, 2018
Purpose: a comparative study of the effect of cycloplegia on wavefront aberration in children with myopia and hyperopia. Material and methods. The study involved 20 patients (39 eyes) with myopic refraction (averagely -5.2 ± 1,5 D) and 26 patients (52 ...
E. P. Tarutta, S. G. Arutyunyan, T. S. Smirnova   +2 more
doaj   +1 more source

Reflective Focusing Based on Few-Layer Gradient Metasurface Element Array

Frontiers in Physics, 2020
This study proposes a three-layer focusing gradient metasurface for wavefront processing. The structure works in the frequency range of 15–25 GHz and has a central frequency of 19.6 GHz.
Mengyao Yan, Zhichao Sun, Bairui Wu, Pan Cheng, Bijun Xu   +4 more
doaj   +1 more source

It is a sufficient condition only, not a necessary and sufficient condition, for decomposing wavefront aberrations

Journal of the European Optical Society-Rapid Publications, 2022
The classic equation for decomposing the wavefront aberrations of axis-symmetrical optical systems has the form, W ( h 0 , ρ , ϕ ) = ∑ j = 0 ∝ ∑ p = 0 ∝ ∑ m = 0 ∝ C 2 j + m 2 p + m m ( h 0 ...
Lin Psang
doaj   +1 more source

Rhythmic Calcium Events in the Lamina Propria Network of the Urinary Bladder of Rat Pups

Frontiers in Systems Neuroscience, 2017
The lamina propria contains a dense network of cells, including interstitial cells (ICs), that may play a role in bladder function by modulating communication between urothelium, nerve fibers and smooth muscle or acting as pacemakers.
Thomas J. Heppner, Grant W. Hennig, Mark T. Nelson, Margaret A. Vizzard   +3 more
doaj   +1 more source

Ground-layer wavefront reconstruction from multiple natural guide stars [PDF]

, 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., Baranec C., Casali M., Christoph Baranec, Egner S. E., Ellerbroek B. L., Ellerbroek B. L., Fabricant D., Johns M., Le Louarn M., Lloyd-Hart M., Lloyd-Hart M., Michael Lloyd‐Hart, Morris T. J., N. Mark Milton, Stoesz J., Szeto K., Velur V.   +17 more
core   +3 more sources

Optical Bench Analysis of 2 Depth of Focus Intraocular Lenses

Biomedicine Hub, 2021
Background: The aim of the study was to analyze the objective optical properties of 2 enhanced depth of focus (EDoF) intraocular lenses (IOLs) using optical bench analysis.
Andreas F. Borkenstein, Eva-Maria Borkenstein, Holger Luedtke, Ruediger Schmid   +3 more
doaj   +1 more source

Zernike-coefficient extraction via helical beam reconstruction for optimization (ZEHBRO) in the far field

High Power Laser Science and Engineering, 2023
The spatial distribution of beams with orbital angular momentum in the far field is known to be extremely sensitive to angular aberrations, such as astigmatism, coma and trefoil. This poses a challenge for conventional beam optimization strategies when a
J. B. Ohland, D. Posor, U. Eisenbarth, V. Iancu, R. Ungureanu, D. Ursescu, V. Bagnoud   +6 more
doaj   +1 more source