Results 31 to 40 of about 77,267 (242)

Post hoc Correction of Chromatic Aberrations in Large-Scale Volumetric Images in Confocal Microscopy

open access: yesFrontiers in Neuroanatomy, 2021
Over the last decade, tissue-clearing techniques have expanded the scale of volumetric fluorescence imaging of the brain, allowing for the comprehensive analysis of neuronal circuits at a millimeter scale.
Marcus N. Leiwe   +2 more
doaj   +1 more source

Design, Fabrication and Analysis of a Hybrid-Order Monolithic Imaging Diffractive Lens on a Germanium Substrate

open access: yesMicromachines, 2023
Diffractive optical elements are gradually replacing some conventional optical elements and becoming a key component of optical systems due to their unique phase modulation function.
Yidi Zheng   +12 more
doaj   +1 more source

The fractional chromatic number of triangle-free subcubic graphs [PDF]

open access: yes, 2014
Heckman and Thomas conjectured that the fractional chromatic number of any triangle-free subcubic graph is at most 14 / 5. Improving on estimates of Hatami and Zhu and of Lu and Peng, we prove that the fractional chromatic number of any triangle-free ...
Král’, Daniel   +5 more
core   +1 more source

VISUALIZING UNCERTAINTY WITH CHROMATIC ABERRATION [PDF]

open access: yes, 2022
In recent years an increasing array of research are being conducted by researchers in the field of uncertainty visualization that attempt to determine the impact of representations on users’ perception and evaluate its effectiveness in decision making ...
Islam, Md Rashidul
core   +2 more sources

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

Real-time correction of chromatic aberration in optical fluorescence microscopy

open access: yes, 2023
Multi-color fluorescence imaging is a powerful tool for studying the spatial relationships and interactions among sub-cellular structures in biological specimens.
Conesa Mingo, Pablo   +14 more
core   +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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