Results 31 to 40 of about 142,742 (388)

Tissue-Saving Zernike Terms Selection in Customized Treatments for Refractive Surgery

open access: yesJournal 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

Study of a MEMS-based Shack-Hartmann wavefront sensor with adjustable pupil sampling for astronomical adaptive optics [PDF]

open access: yes, 2008
We introduce a Shack-Hartmann wavefront sensor for adaptive optics that enables dynamic control of the spatial sampling of an incoming wavefront using a segmented mirror microelectrical mechanical systems (MEMS) device.
Baranec, Christoph, Dekany, Richard
core   +1 more source

Centre Symmetry Sets of Families of Plane Curves

open access: yesDemonstratio 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

The estimation of far-field wavefront error of tilt-to-length distortion coupling in space-based gravitational wave detection [PDF]

open access: yes, 2022
In space-based gravitational wave detection, the estimation of far-field wavefront error of the distorted beam is the precondition for the noise reduction. Zernike polynomials is used to describe the wavefront error of the transmitted distorted beam. The propagation of a laser beam between two telescope apertures is calculated numerically.
arxiv   +1 more source

Three-dimensional spatiotemporal focusing of holographic patterns

open access: yesNature Communications, 2016
Three-dimensional computer-generated holography cannot be implemented with temporal focusing. Here, Hernandez et al. use two spatial light modulators to control transverse- and axial-target light distribution, generating spatiotemporally focused patterns
Oscar Hernandez   +5 more
doaj   +1 more source

A review of higher order aberrations of the human eye

open access: yesAfrican 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

Demonstrating backflow in classical two beams’ interference

open access: yesNew Journal of Physics, 2022
The well-known interference pattern of bright and dark fringes was first observed for light beams back in 1801 by Thomas Young. The maximum visibility fringes occur when the irradiance of the two beams is equal, and as the ratio of the beam intensities ...
Anat Daniel   +3 more
doaj   +1 more source

Turbulent parameters at different heights in the atmosphere. Shack–Hartmann wavefront sensor data

open access: yesSolar-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

On-chip wavefront shaping with dielectric metasurface

open access: yesNature Communications, 2019
Metasurfaces can be programmed for a spatial transformation of the wavefront, thus allowing parallel optical signal processing on-chip within an ultracompact dimension.
Zi Wang   +5 more
semanticscholar   +1 more source

Wavefront shaping with disorder-engineered metasurfaces [PDF]

open access: yesNature Photonics, 2017
Recently, wavefront shaping with disordered media has demonstrated optical manipulation capabilities beyond those of conventional optics, including extended volume, aberration-free focusing and subwavelength focusing.
Mooseok Jang   +9 more
semanticscholar   +1 more source

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