Results 1 to 10 of about 30,513 (117)

Quaternary Categorization Strategy for Reconstructing High-Reflectivity Surface in Structured Light Illumination [PDF]

open access: yesSensors, 2023
Structured light illumination is widely applied for surface defect detection due to its advantages in terms of speed, precision, and non-contact capabilities.
Bin Xu   +7 more
doaj   +2 more sources

An Investigation into the Planning of Cutting Interpolation Point Positions to Improve the Surface Quality of Satellite Laser Communication Reflectors [PDF]

open access: yesMicromachines
Spherical/aspherical mirrors are widely used in satellite communication and imaging systems, but their reflectivity is affected by the surface roughness value.
Guilin Zhuang, Qian Yu, Zihao Zeng
doaj   +2 more sources

Fano-Resonant Metasurface with 92% Reflectivity Based on Lithium Niobate on Insulator

open access: yesNanomaterials, 2022
Lithium niobate is an excellent optoelectronic and nonlinear material, which plays an important role in integrated optics. However, lithium niobate is difficult to etch due to its very stable chemical nature, and the microstructure of lithium niobate’s ...
Leshu Liu   +4 more
doaj   +1 more source

Numerical Investigation of Phononic Crystal Based Film Bulk Acoustic Wave Resonators

open access: yesNanomaterials, 2021
Film bulk acoustic resonator (FBAR)-based filters have attracted great attention because they can be used to build high-performance RF filters with low cost and small device size.
Linhao Shi   +5 more
doaj   +1 more source

High-Reflective Templated Cholesteric Liquid Crystal Filters

open access: yesMolecules, 2021
Cholesteric liquid crystals (CLCs) have been widely applied in optical filters due to Bragg reflection caused by their helical structure. However, the reflectivity of CLC filters is relatively low, commonly less than 50%, as the filters can only reflect ...
Yao Gao, Yuxiang Luo, Jiangang Lu
doaj   +1 more source

High Power and Contamination Properties of All-Silica High Reflectivity Multilayers

open access: yesIEEE Photonics Journal, 2021
Optical multilayers created from a single material have been demonstrated to have lower stress and lower thermal expansion mismatch than standard two-material coatings; however, questions of high power operation and vulnerability to environmental ...
Phyo Lin   +5 more
doaj   +1 more source

Image muting of mixed precipitation to improve identification of regions of heavy snow in radar data [PDF]

open access: yesAtmospheric Measurement Techniques, 2022
In winter storms, enhanced radar reflectivity is often associated with heavy snow. However, some higher reflectivities are the result of mixed precipitation including melting snow.
L. M. Tomkins   +4 more
doaj   +1 more source

High Reflectivity and Low Reflectivity Properties on OCTA Influence the Detection of Macular Neovascularization in AMD

open access: yesFrontiers in Physics, 2021
Background: In this study, we aimed to discriminate high reflectivity and low reflectivity macular neovascularization (MNV) lesions secondary to age-related macular degeneration (AMD)and to assess the influence of blood flow features on the amount of MNV
Alessandro Arrigo   +6 more
doaj   +1 more source

An Application of Elastic-Net Regularized Linear Inverse Problem in Seismic Data Inversion

open access: yesApplied Sciences, 2023
In exploration geophysics, seismic impedance is a physical characteristic parameter of underground formations. It can mark rock characteristics and help stratigraphic analysis.
Ronghuo Dai, Cheng Yin, Da Peng
doaj   +1 more source

Simulation of film bulk acoustic resonator based on two-dimensional phononic crystals

open access: yes物联网学报, 2022
A new structure of film bulk acoustic resonator (FBAR) based on phononic crystal (PnC) was proposed.The phononic crystal was used as the acoustic reflection layer at the bottom of the bulk acoustic wave resonator, which has the characteristics of high ...
Linhao SHI   +5 more
doaj   +2 more sources

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