Results 1 to 10 of about 509,731 (381)

Estimation of high-order aberrations and anisotropic magnification from cryo-EM data sets in RELION-3.1

open access: yesIUCrJ, 2020
Methods are presented that detect three types of aberrations in single-particle cryo-EM data sets: symmetrical and antisymmetrical optical aberrations and magnification anisotropy. Because these methods only depend on the availability of a preliminary 3D
Jasenko Zivanov   +2 more
doaj   +2 more sources

Aberrations and accommodation [PDF]

open access: yesClinical and Experimental Optometry, 2020
Modern methods of measuring the refractive state of the eye include wavefront sensors which make it possible to monitor both static and dynamic changes of the ocular wavefront while the eye observes a target positioned at different distances away from the eye.
Antonio J, Del Águila-Carrasco   +3 more
openaire   +3 more sources

Improved GRAVITY astrometric accuracy from modeling optical aberrations [PDF]

open access: yesAstronomy & Astrophysics, 2021
The GRAVITY instrument on the ESO VLTI pioneers the field of high-precision near-infrared interferometry by providing astrometry at the 10−100 μas level. Measurements at this high precision crucially depend on the control of systematic effects.
G. Collaboration   +62 more
semanticscholar   +1 more source

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

open access: yesJournal 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

High order aberration and straylight evaluation after cataract surgery with implantation of an aspheric, aberration correcting monofocal intraocular lens [PDF]

open access: yesInternational Journal of Ophthalmology, 2015
AIM:To evaluate the quality of vision in respect to high order aberrations and straylight perception after implantation of an aspheric, aberration correcting, monofocal intraocular lens (IOL).METHODS:Twenty-one patients (34 eyes) aged 50 to 83y underwent
Florian T A Kretz   +3 more
doaj   +1 more source

Active Aberration Correction with Adaptive Coefficient SPGD Algorithm for Laser Scanning Confocal Microscope

open access: yesSensors, 2022
A laser scanning confocal microscope (LSCM) is an effective scientific instrument for studying sub-micron structures, and it has been widely used in the field of biological detection. However, the illumination depth of LSCMs is limited due to the optical
Kunhua Zhou   +5 more
doaj   +1 more source

Miniature optical planar camera based on a wide-angle metasurface doublet corrected for monochromatic aberrations [PDF]

open access: yesNature Communications, 2016
Optical metasurfaces are two-dimensional arrays of nano-scatterers that modify optical wavefronts at subwavelength spatial resolution. They are poised to revolutionize optics by enabling complex low-cost systems where multiple metasurfaces are ...
A. Arbabi   +5 more
semanticscholar   +1 more source

Self calibration of sensorless adaptive optical microscopes [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2011
We present a self-calibrating scheme for microscopes using model-based wavefront sensorless adaptive optics. Unlike previous methods, this scheme permits the calibration of system aberration modes without the need for a separate wavefront sensor or ...
Thayil Anisha, Booth Martin J.
doaj   +1 more source

PRODUCIBILITY ANALYSIS OF LENS SYSTEM DURING OPTICAL DESIGN STAGE [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2020
Subject of Research. The paper presents the idea of combining various stages of production of optical devices in a single logical sequence from the design of optical elements, through the mechanical and technological production stages, to the calculation
Irina L. Livshits, Oliver Faehnle
doaj   +1 more source

Implantation of a Small Aperture Intraocular Lens in Eyes with Irregular Corneas and Higher Order Aberrations

open access: yesJournal of Ophthalmic & Vision Research, 2022
Purpose: Corneal irregularities can lead to high order aberrations (HOAs) and may influence the outcomes in terms of intraocular lens (IOL) selection and visual acuity assessment.
Fabrizio Franco   +8 more
doaj   +1 more source

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