Results 21 to 30 of about 107,362 (279)
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 +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 +4 more
doaj +1 more source
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
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. +17 more
core +3 more sources
Evolution of refractive surgeries
Muller Journal of Medical Sciences and Research, 2017 The use of surgical procedures to correct refractive errors of the eye has come a long way. The two main types are corneal procedures and intraocular procedures.
Madhurima K Nayak
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Flow structure and optical beam propagation in high-Reynolds-number gas-phase shear layers and jets [PDF]
, 2001 We report on the structure of the scalar index-of-refraction field generated by turbulent, gas-phase, incompressible and compressible shear layers and incompressible jets, and on associated beam-propagation aero-optical phenomena.
Catrakis, H. J. +2 more
core +1 more source
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 +3 more
doaj +1 more source
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 +6 more
doaj +1 more source
A Demonstration of Wavefront Sensing and Mirror Phasing from the Image Domain [PDF]
, 2014 In astronomy and microscopy, distortions in the wavefront affect the dynamic range of a high contrast imaging system. These aberrations are either imposed by a turbulent medium such as the atmosphere, by static or thermal aberrations in the optical path,
Cheetham, Anthony +5 more
core +2 more sources
Компьютерная оптика, 2022 The transport-of-intensity equation provides a new non-interferometric and non-iterative access to quantitative information about the phase of a light wave by measuring intensity distributions. This equation can be used to implement a simple and accurate
N.G. Stsepuro +5 more
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