Results 71 to 80 of about 27,968 (274)
Broadband achromatic dielectric metalenses
Light: Science & Applications, 2018 Metasurfaces offer a unique platform to precisely control optical wavefronts and enable the realization of flat lenses, or metalenses, which have the potential to substantially reduce the size and complexity of imaging systems and to realize new imaging ...
S. Shrestha +4 more
semanticscholar +1 more source
Advanced Materials Technologies, EarlyView.This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane +4 more
wiley +1 more source
Chromatic signals control proboscis movements during hovering flight in the hummingbird hawkmoth Macroglossum stellatarum. [PDF]
PLoS ONE, 2012 Most visual systems are more sensitive to luminance than to colour signals. Animals resolve finer spatial detail and temporal changes through achromatic signals than through chromatic ones.
Joaquín Goyret, Almut Kelber
doaj +1 more source
Geometric Achromatic and Pseudoachromatic Indices [PDF]
Graphs and Combinatorics, 2015 21 pages, 10 ...
Oswin Aichholzer +6 more
openaire +3 more sources
A Correlative SICM‐OPM Platform for Surface and Volumetric Imaging in Live Cells
Advanced Science, EarlyView.A multifunctional correlative imaging platform integrating Scanning Ion Conductance Microscopy (SICM) with Oblique Plane Microscopy (OPM) enables simultaneous surface topography, mechanical mapping, and 3D volumetric fluorescence imaging in live cells.
Wenzhi Hong +13 more
wiley +1 more source
Graph with given achromatic number
, 1976 An irreducible (point-determining) graph is one in which distinct vertices have distinct neighbourhoods. Every graph X can be reduced to an irreducible graph X∗ by identifying all vertices with the same neighbourhood; the colourability properties of X ...
Miller, Donald J., Hell, Pavol
core +1 more source
Xibei Gongye Daxue Xuebao, 2023 This paper proposes the use of aperture sharing synergistic operation in the structure of the metalens, together with the rational selection of the scattering unit size according to the linear relationship between the output phase and frequency of the ...
LYU Shuyuan +4 more
doaj +1 more source
Nature CommunicationsAchieving achromaticity across the visible light spectrum is crucial for metalenses in imaging systems. Single-layer metalenses struggle with weak focusing power or small aperture sizes due to inadequate group delay control.
Shengyuan Chang +5 more
semanticscholar +1 more source
Nature Communications, 2022 Diffractive and refractive optical elements have become an integral part of most high-resolution X-ray microscopes. However, they suffer from inherent chromatic aberration.
A. Kubec +5 more
semanticscholar +1 more source
Advanced Science, EarlyView.A compact eight‐channel electrically tunable varifocal metalens with three single‐layer polarization‐multiplexed bi‐focal metalens and three LC cells. The total thickness of the device is ∼6 mm, while the focal lengths can be switched among eight values (3.6, 4.2, 4.5, 4.9, 6.2, 6.9, 8.4, and 9.6 mm). ABSTRACT As an essential module of optical systems,
Zhiyao Ma +11 more
wiley +1 more source