Results 31 to 40 of about 154,766 (375)

Angle-based wavefront sensing enabled by the near fields of flat optics

open access: yesNature Communications, 2021
There is a long history of using angle sensors to measure wavefront. The best example is the Shack-Hartmann sensor. Compared to other methods of wavefront sensing, angle-based approach is more broadly used in industrial applications and scientific ...
Soongyu Yi   +5 more
semanticscholar   +1 more source

Confusion in differential piston measurement with the pyramid wavefront sensor

open access: yesAstronomy & Astrophysics, 2021
Context. The pyramid was proven to be a highly sensitive and versatile wave-front sensor (WFS) and has been selected to be installed on the single conjugate adaptive optics (AO) systems of the extremely large telescope (ELT).
A. Bertrou-Cantou   +6 more
semanticscholar   +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

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

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

Compressive Wavefront Sensing with Weak Values [PDF]

open access: yes, 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   +3 more sources

Guidestar-free image-guided wavefront shaping [PDF]

open access: yesScience Advances, 2020
Optical imaging through turbid samples and fibers is made possible by adaptive correction of scattering guided by image quality. Optical imaging through scattering media is a fundamental challenge in many applications.
Tomer Yeminy, O. Katz
semanticscholar   +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

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

Computational Method for Wavefront Sensing Based on Transport-of-Intensity Equation

open access: yesPhotonics, 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

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