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   Articles with "optical turbulence" as a keyword



Performance analysis of underwater wireless optical communication systems over a wide range of optical turbulence

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recommendations! Published in 2018 at "Optics Communications"

DOI: 10.1016/j.optcom.2018.07.029

Abstract: Abstract The propagation of optical signal under water is affected by three major degrading phenomena, namely absorption, scattering, and turbulence. The statistical distribution of turbulence-induced fading though has not yet been well characterized. In this… read more here.

Keywords: wireless optical; optical turbulence; optical communication; turbulence ... See more keywords
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Limitations imposed by optical turbulence profile structure and evolution on tomographic reconstruction for the ELT

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recommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/staa795

Abstract: The performance of tomographic adaptive optics (AO) systems is intrinsically linked to the vertical profile of optical turbulence. First, a sufficient number of discrete turbulent layers must be reconstructed to model the true continuous turbulence… read more here.

Keywords: optical turbulence; tomographic reconstruction; evolution; turbulence ... See more keywords

Optical turbulence in the atmospheric surface layer at the Pamir Plateau Muztagh-ata site

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recommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stae2420.

Abstract: In this paper, we conducted a detailed analysis of optical turbulence in the Atmospheric Surface Layer (ASL) at Muztagh-ata site during on-site testing. We utilized ultrasonic anemometers positioned on a 30-meter tower to collect and… read more here.

Keywords: muztagh ata; optical turbulence; ata site; surface ... See more keywords

Feasibility of remote estimation of optical turbulence via quick response code imaging

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recommendations! Published in 2024 at "Journal of Applied Remote Sensing"

DOI: 10.1117/1.jrs.18.014505

Abstract: Abstract. Turbulence estimation theory is presented and demonstrated by imaging a series of spatially encoded quick response (QR) codes in ambient radiation through atmospheric scintillation. This remote sensing concept was verified though preliminary feasibility experiments… read more here.

Keywords: optical turbulence; code; turbulence; estimation ... See more keywords

Deep learning for anisoplanatic optical turbulence mitigation in long-range imaging

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recommendations! Published in 2021 at "Optical Engineering"

DOI: 10.1117/1.oe.60.3.033103

Abstract: Abstract. We present a deep learning approach for restoring images degraded by atmospheric optical turbulence. We consider the case of terrestrial imaging over long ranges with a wide field-of-view. This produces an anisoplanatic imaging scenario… read more here.

Keywords: turbulence; turbulence mitigation; optical turbulence; cnn ... See more keywords

Application of tilt correlation statistics to anisoplanatic optical turbulence modeling and mitigation.

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recommendations! Published in 2021 at "Applied optics"

DOI: 10.1364/ao.418458

Abstract: Atmospheric optical turbulence can be a significant source of image degradation, particularly in long range imaging applications. Many turbulence mitigation algorithms rely on an optical transfer function (OTF) model that includes the Fried parameter. We… read more here.

Keywords: modeling mitigation; turbulence; otf model; turbulence modeling ... See more keywords

Scene motion detection in imagery with anisoplanatic optical turbulence using a tilt-variance-based Gaussian mixture model.

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recommendations! Published in 2021 at "Applied optics"

DOI: 10.1364/ao.424181

Abstract: In long-range imaging applications, anisoplanatic atmospheric optical turbulence imparts spatially- and temporally varying blur and geometric distortions in acquired imagery. The ability to distinguish true scene motion from turbulence warping is important for many image-processing… read more here.

Keywords: anisoplanatic optical; turbulence; motion; scene motion ... See more keywords

Underwater imaging in optical turbulence: average temperature and salinity effects.

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recommendations! Published in 2021 at "Applied optics"

DOI: 10.1364/ao.435484

Abstract: Classic imaging systems may experience deleterious effects of optical turbulence, leading to their quality degradation induced by image jitter and blur. Using a recently introduced model for the refractive index power spectrum of natural water… read more here.

Keywords: turbulence; average temperature; underwater imaging; optical turbulence ... See more keywords

Absorption, scattering, and optical turbulence in natural waters.

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recommendations! Published in 2022 at "Applied optics"

DOI: 10.1364/ao.454423

Abstract: The Beer-Lambert-Bouguer law characterizes attenuation of an optical plane wave resolved in terms of absorption and scattering of a medium it passes through. However, the optical turbulence present in a medium may also cause severe… read more here.

Keywords: absorption scattering; optical turbulence; scattering optical; turbulence ... See more keywords

Estimation of atmospheric optical turbulence strength in realistic airborne environments.

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recommendations! Published in 2022 at "Applied optics"

DOI: 10.1364/ao.459461

Abstract: In this paper, atmospheric optical turbulence strength is estimated for realistic airborne environments using a modified phase-variance approach, as well as a modified slope-discrepancy approach. Realistic airborne environments are generated using wave-optics simulations of a… read more here.

Keywords: optical turbulence; atmospheric optical; turbulence strength; airborne environments ... See more keywords

Atmospheric optical turbulence mitigation using iterative image registration and least squares lucky look fusion.

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recommendations! Published in 2022 at "Applied optics"

DOI: 10.1364/ao.467958

Abstract: This paper presents an atmospheric optical turbulence mitigation method that uses a sequence of short-exposure frames. An iterative block matching registration method is proposed for image dewarping. The dewarped frames are combined in a least… read more here.

Keywords: turbulence mitigation; squares lucky; optical turbulence; atmospheric optical ... See more keywords