Results 31 to 40 of about 80,548 (342)
Radio Positioning With EM Processing of the Spherical Wavefront [PDF]
IEEE Transactions on Wireless Communications, 2019 Next 5G and beyond applications have attracted a tremendous interest towards systems using antenna arrays with an extremely large number of antennas where the technology conceived for communication might also be exploited for high-accuracy positioning ...
F. Guidi, D. Dardari
semanticscholar +1 more source
Fourier transform-wavefront reconstruction for the pyramid wavefront sensor [PDF]
1st AO4ELT conference - Adaptive Optics for Extremely Large Telescopes, 2010 The application of Fourier-transform reconstruction techniques to the pyramid wavefront sensor has been investigated. A preliminary study based on end-to-end simulations of an adaptive optics system with ≈40x40 subapertures and actuators shows that the performance of the Fourier-transform reconstructor (FTR) is of the same order of magnitude than the ...
Quirós-Pacheco, Fernando +2 more
openaire +3 more sources
Tissue-Saving Zernike Terms Selection in Customized Treatments for Refractive Surgery
Journal of Optometry, 2009 Purpose: To study the possibility of performing customized refractive surgery minimising the amount of ablated tissue without compromising visual quality.
Samuel Arba-Mosquera +2 more
doaj +1 more source
Turbulent parameters at different heights in the atmosphere. Shack–Hartmann wavefront sensor data
Solar-Terrestrial Physics, 2022 The paper presents the results of studies of wavefront distortions at different heights in the atmosphere. We have used measurement wavefront data to determine optical turbulence parameters along the line of sight of the Large Solar Vacuum Telescope ...
Shikhovtsev A. Y. +5 more
doaj +1 more source
Deep learning wavefront sensing.
Optics Express, 2019 We present a new class of wavefront sensors by extending their design space based on machine learning. This approach simplifies both the optical hardware and image processing in wavefront sensing.
Yohei Nishizaki +6 more
semanticscholar +1 more source
Centre Symmetry Sets of Families of Plane Curves
Demonstratio Mathematica, 2015 We study centre symmetry sets and equidistants for a I-parameter family of plane curves where, for a special member of the family, there exist two inflexions with parallel tangents.
Giblin Peter, Reeve Graham
doaj +1 more source
Reconstructing the Spatial Parameters of a Laser Beam Using the Transport-of-Intensity Equation
Sensors, 2022 A simple method for reconstructing the spatial parameters of a laser beam, based on the transport-of-intensity equation, is presented. Registration of cross-section intensity distributions in several planes was carried out using a single CMOS camera. The
Michael Kovalev +5 more
doaj +1 more source
Interference-assisted kaleidoscopic meta-plexer for arbitrary spin-wavefront manipulation
Light: Science & Applications, 2019 Achieving simultaneous polarization and wavefront control, especially circular polarization with the auxiliary degree of freedom of light and spin angular momentum, is of fundamental importance in many optical applications.
He-xiu Xu +11 more
semanticscholar +1 more source
A review of higher order aberrations of the human eye
African Vision and Eye Health, 2019 Background: This literature review is part of a research study for aberration-correcting soft contact lenses, where wavefront aberrometry was utilised.
Ayesha Suliman, Alan Rubin
doaj +1 more source
Computational Method for Wavefront Sensing Based on Transport-of-Intensity Equation
Photonics, 2021 Recently the transport-of-intensity equation as a phase imaging method turned out as an effective microscopy method that does not require the use of high-resolution optical systems and a priori information about the object.
Iliya Gritsenko +4 more
doaj +1 more source