Results 1 to 10 of about 2,420,038 (307)

A Mitigation Method for Optical-Turbulence-Induced Errors and Optimal Target Design in Vision-Based Displacement Measurement [PDF]

open access: yesSensors, 2023
Computer vision-based displacement measurement techniques are increasingly used for structural health monitoring. However, the vision sensors employed are easily affected by optical turbulence when capturing images of the structure, resulting in ...
Xingyu Huang   +4 more
doaj   +2 more sources

Improved equivalent optical turbulence method for anisotropic compressible and atmospheric turbulence under different beam transmission distances [PDF]

open access: yesScientific Reports
The impact of different turbulence on beams can be seen as optical distortions caused by refractive index fluctuations around vortices in turbulence. Therefore, from the perspective of transmission effects, the transmission outcomes of beam in different ...
Wenjie Wu, Jinyu Xie, Lu Bai
doaj   +2 more sources

Spatial Fluctuations of Optical Turbulence Strength in a Laboratory Turbulence Simulator

open access: yesPhotonics
Controlled turbulence simulators in the laboratory have been extensively employed to investigate turbulence effects on light propagation in the atmosphere, driven by some advanced optical engineering such as remote sensing, energy-delivery systems, and ...
Yanling Li   +6 more
doaj   +3 more sources

Stability of optical knots in atmospheric turbulence

open access: yesNature Communications
Topology advances the understanding of many branches of science and technology, from elementary particle physics to condensed matter physics. While the topological stability of mathematical knots implies robustness to perturbations and suggests their ...
D. G. Pires   +4 more
doaj   +3 more sources

Blind Equalization Based on Modified Third-Order Moment Algorithm for PAM-PPM Optical Signals in FSO Communication [PDF]

open access: yesSensors
In order to mitigate the influence of turbulence on pulse amplitude modulation–pulse position modulation (PAM-PPM) optical signals, which represents a promising avenue for future high-speed free-space optical (FSO) communication, this paper proposes a ...
Shutian Luo, Xiaofeng Li
doaj   +2 more sources

Analyzing the Effects of a Basin on Atmospheric Environment Relevant to Optical Turbulence

open access: yesPhotonics, 2022
The performance of adaptive optics (AO) systems are highly dependent upon optical turbulence. Thus, it is necessary to have the appropriate knowledge of the spatiotemporal characteristics of optical turbulence strength.
Manman Xu   +4 more
doaj   +1 more source

A Survey of Structure of Atmospheric Turbulence in Atmosphere and Related Turbulent Effects

open access: yesAtmosphere, 2021
The Earth’s atmosphere is the living environment in which we live and cannot escape. Atmospheric turbulence is a typical random inhomogeneous medium, which causes random fluctuations of both the amplitude and phase of optical wave propagating through it.
Fazhi Wang   +4 more
doaj   +1 more source

Non-Classic Atmospheric Optical Turbulence: Review

open access: yesApplied Sciences, 2021
Theoretical models and results of experimental campaigns relating to non-classic regimes occurring in atmospheric optical turbulence are overviewed.
Olga Korotkova, Italo Toselli
doaj   +1 more source

Laboratory Measurements of the Influence of Turbulence Intensity on the Instantaneous-Fading Reciprocity of Bidirectional Atmospheric Laser Propagation Link

open access: yesApplied Sciences, 2021
The reciprocity of the atmospheric turbulence channel in the bidirectional atmospheric laser propagation link is experimentally tested. The bidirectional transceiving coaxial atmospheric laser propagation link is built by using a hot air convection-type ...
Yi Liu   +4 more
doaj   +1 more source

Atmospheric Optical Turbulence Characteristics over the Ocean Relevant to Astronomy and Atmospheric Physics

open access: yesApplied Sciences, 2021
Due to the space and time constraints of turbulence measurement equipment and the experiment scene, it is difficult to obtain the atmosphere refractive index structure constant over the ocean.
Manman Xu   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy