Results 51 to 60 of about 243,834 (314)

Ray Tracing Methods for Correcting Chromatic Aberrations in Imaging Systems

open access: yesInternational Journal of Optics, 2014
The correction of chromatic aberrations is typically performed using aberration formulas or by using real ray tracing. While the use of aberration formulas might be effective for some simple optical systems, it has limitations for complex and fast ...
Dmitry Reshidko   +2 more
doaj   +1 more source

Multiwavelength polarization insensitive lenses based on dielectric metasurfaces with meta-molecules [PDF]

open access: yes, 2016
Metasurfaces are nano-structured devices composed of arrays of subwavelength scatterers (or meta-atoms) that manipulate the wavefront, polarization, or intensity of light.
Arbabi, Amir   +4 more
core   +3 more sources

Topography and longitudinal chromatic aberration characterizations of refractive-diffractive multifocal intraocular lenses.

open access: yesJournal of cataract and refractive surgery, 2019
PURPOSE Most optical systems present chromatic aberration quantified along the optical axis by the longitudinal chromatic aberration (LCA). LCA is controlled by the biomaterial Abbe number combined with diffractive effects, driven by the intraocular lens
J. Loicq, Nicolas Willet, D. Gatinel
semanticscholar   +1 more source

Cascaded chiral birefringent media enabled planar lens with programable chromatic aberration

open access: yesPhotoniX
Wavefront control is the fundamental requirement in optical informatics. Planar optics have drawn intensive attention due to the merits of compactness and light weight.
Dewei Zhang   +7 more
semanticscholar   +1 more source

Multimodal label-free ex vivo imaging using a dual-wavelength microscope with axial chromatic aberration compensation [PDF]

open access: yesJournal of Biomedical Optics, 2017
. Label-free microscopy is a very powerful technique that can be applied to study samples with no need for exogenous fluorescent probes, keeping the main benefits of multiphoton microscopy, such as longer penetration depths and intrinsic optical ...
A. Filippi   +8 more
semanticscholar   +1 more source

A proposed Mathematical Expression for Computer Design of Electrostatic Mirror

open access: yesمجلة بغداد للعلوم, 2012
A computational investigation has been carried out on the design and properties of the electrostatic mirror. In this research, we suggest a mathematical expression to represent the axial potential of an electrostatic mirror.
Baghdad Science Journal
doaj   +1 more source

Achromatic polymer-dispersed liquid crystal lens with diffractive–refractive hybrid structure

open access: yesMaterials Research Express, 2023
The focal length of liquid crystal Fresnel lens is electrically controllable, but the disadvantage is the chromatic aberration is obvious. In this paper, the electrically controlled zoom characteristics of liquid crystal lens and the basic theory of ...
Binming Liang, Jing An, Xin Su
doaj   +1 more source

Effect of different root lengths for retaining freshness of hydroponic lettuce

open access: yesJournal of Agriculture and Food Research, 2021
Harvesting with roots can help retain the freshness of hydroponic lettuce. And different root lengths may have different effects for freshness. To determine the optimal root length of hydroponic lettuce for retaining freshness, a root cutting and storage
Rui Suo   +4 more
doaj   +1 more source

Broadband achromatic optical metasurface devices

open access: yesNature Communications, 2017
Metasurfaces suffer from large chromatic aberration due to the high phase dispersion of their building blocks, limiting their applications. Here, Wang et al. design achromatic metasurface devices which eliminate the chromatic aberration over a continuous
Shuming Wang   +12 more
doaj   +1 more source

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