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   Articles with "refraction" as a keyword



Simultaneous signal optimization of refraction and attenuation in x‐ray grating interferometry: A case study for breast imaging

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recommendations! Published in 2025 at "Medical Physics"

DOI: 10.1002/mp.70069

Abstract: X‐ray grating interferometry has emerged as a promising imaging technique for breast computed tomography (BCT), offering complementary contrast from refraction beyond conventional absorption imaging. Although it provides higher resolution, the required dose levels remain above… read more here.

Keywords: grating interferometry; refraction; ray grating; simultaneous signal ... See more keywords

Refractive assessment by wavefront aberrometry compared to subjective refraction in PRK patients

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recommendations! Published in 2025 at "Graefe's Archive for Clinical and Experimental Ophthalmology"

DOI: 10.1007/s00417-025-06868-9

Abstract: To compare wavefront aberrometry (WA) refraction with subjective refraction (SR) before and after transepithelial photorefractive keratectomy (tPRK) or combined phototherapeutic keratectomy (PTK)-PRK. In our monocentric retrospective study, we aimed to compare refraction measurements obtained using… read more here.

Keywords: refraction; agreement; prk patients; wavefront aberrometry ... See more keywords

Reconfigurable mechanism-based metamaterials for ternary-coded elastic wave polarizers and programmable refraction control

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recommendations! Published in 2024 at "Applied Mathematics and Mechanics"

DOI: 10.1007/s10483-024-3161-6

Abstract: Elastic metamaterials with unusual elastic properties offer unprecedented ways to modulate the polarization and propagation of elastic waves. However, most of them rely on the resonant structural components, and thus are frequency-dependent and unchangeable. Here,… read more here.

Keywords: reconfigurable mechanism; coded elastic; refraction; ternary coded ... See more keywords

The effects of partial and full correction of refractive errors on sensorial and motor outcomes in children with refractive accommodative esotropia

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recommendations! Published in 2018 at "International Ophthalmology"

DOI: 10.1007/s10792-018-0889-z

Abstract: PurposeTo investigate the effects of partial and full correction of refractive errors on sensorial and motor outcomes in children with refractive accommodative esotropia (RAE).MethodsThe records of pediatric cases with full RAE were reviewed; their first… read more here.

Keywords: deviation; group; full correction; refractive errors ... See more keywords

Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots

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recommendations! Published in 2020 at "Journal of Russian Laser Research"

DOI: 10.1007/s10946-020-09923-4

Abstract: We analyze the features of nonlinear refraction in colloidal solutions containing Ag2S quantum dots capped with thioglycolic acid (Ag2S/TGA) or L-cysteine (Ag2S/L-Cys), with the quantum-dot (QD) sizes ranging from 1.7 to 5.5 nm and their… read more here.

Keywords: ag2s; refraction colloidal; refraction; quantum dots ... See more keywords

Alterations in Peripheral Refraction are Most Significant Just Before the Onset of Myopia: Evidence from Multispectral Refraction Topography

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recommendations! Published in 2025 at "Ophthalmology and Therapy"

DOI: 10.1007/s40123-025-01198-9

Abstract: This study aims to explore the characteristics of retinal defocus values (RDVs) during refractive development of Chinese children. In this cross-sectional study, 2125 children (2125 right eyes) aged 4–15 years were included and divided into… read more here.

Keywords: rdvs; topography; defocus; myopia ... See more keywords

Intensity dependent refraction and absorption in doped graphene by perturbation theory

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recommendations! Published in 2018 at "Optik"

DOI: 10.1016/j.ijleo.2017.12.042

Abstract: Abstract The previous studies on graphene were primarily focused on the effect of photon energy to optical nonlinearities but less on that of doping. By the perturbative treatment of external field, we theoretically illustrate the… read more here.

Keywords: absorption; energy; doped graphene; perturbation theory ... See more keywords

Direct linear and refraction-invariant pose estimation and calibration model for underwater imaging

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recommendations! Published in 2019 at "ISPRS Journal of Photogrammetry and Remote Sensing"

DOI: 10.1016/j.isprsjprs.2019.06.004

Abstract: Abstract Accuracy, detail, and limited time on site make photogrammetry a valuable means for underwater mapping. Imaging in such domains is subjected however to distortions which are caused by refraction of the incoming rays. As… read more here.

Keywords: calibration; refraction; model; direct linear ... See more keywords
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Microstructure characterisation of ceramics via 2D and 3D X-ray refraction techniques

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recommendations! Published in 2017 at "Journal of The European Ceramic Society"

DOI: 10.1016/j.jeurceramsoc.2016.12.031

Abstract: 3D imaging techniques are very fashionable nowadays, and allow enormous progress in understanding ceramic microstructure, its evolution, and its link to mechanical, thermal, and transport properties. In this feature article, we report the use of… read more here.

Keywords: microstructure characterisation; ceramics via; characterisation ceramics; via ray ... See more keywords

Modelling of the refraction in trigonometric levelling using polynomial transition curves

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recommendations! Published in 2021 at "Measurement"

DOI: 10.1016/j.measurement.2021.109392

Abstract: Abstract This article presents a new, original approach to modeling vertical refraction in trigonometric levelling. So-called polynomial transition curves are used here. In this approach, it is assumed that the refraction curve coincides with the… read more here.

Keywords: refraction; trigonometric levelling; transition curves; approach ... See more keywords

Significant Axial Elongation with Minimal Change in Refraction in 3- to 6-Year-Old Chinese Preschoolers: The Shenzhen Kindergarten Eye Study.

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recommendations! Published in 2017 at "Ophthalmology"

DOI: 10.1016/j.ophtha.2017.05.030

Abstract: PURPOSE To document the distribution of ocular biometry and to evaluate its associations with refraction in a group of Chinese preschoolers. DESIGN Population-based cross-sectional study. PARTICIPANTS A total of 1133 preschoolers 3 to 6 years… read more here.

Keywords: age; years age; study; ratio ... See more keywords