Results 71 to 80 of about 234,282 (231)
Dual-Wavelength Confocal Laser Speckle Contrast Imaging Using a Deep Learning Approach
PhotonicsThis study developed a novel dual-wavelength confocal laser speckle imaging platform. The system includes both visible and near-infrared lasers and two imaging modes: confocal and wide-field laser speckle contrast imaging.
E Du +10 more
doaj +1 more source
Laser speckle reduction using polymer-stabilized liquid crystals doped with Ag nanowires
Heliyon, 2023 Miniaturized and pure static devices are expected to be used in laser-imaging systems for speckle reduction. In this study, a pure static device based on polymer-stabilized liquid crystal (PSLC) doped with Ag nanowires was developed to effectively ...
Xin Jiang +4 more
doaj +1 more source
Speckle Reduction Using Multiple Tones of Illumination [PDF]
, 1973 The occurrence and smoothing of speckle are studied as a function of the line width for a highly collimated illuminating source. A general theory is presented for speckling in the image of a partially diffuse, phase type of object, which has a variable ...
George, Nicholas, Jain, Atul
core +1 more source
Imaging retinal blood flow with laser speckle flowmetry [PDF]
Frontiers in Neuroenergetics, 2010 Laser speckle flowmetry (LSF) was initially developed to measure blood flow in the retina. More recently, its primary application has been to image baseline blood flow and activity-dependent changes in blood flow in the brain. We now describe experiments in the rat retina in which LSF was used in conjunction with confocal microscopy to monitor light ...
Srienc, Anja I. +2 more
openaire +2 more sources
Super-resolution photoacoustic fluctuation imaging with multiple speckle illumination [PDF]
, 2015 In deep tissue photoacoustic imaging, the spatial resolution is inherently limited by acoustic diffraction. Moreover, as the ultrasound attenuation increases with frequency, resolution is often traded-off for penetration depth.
Allain, Marc +6 more
core +4 more sources
bioRxiv, 2019 Utilizing a high-speed camera and recording back-scattered laser light at more than 20,000 frames per second, we introduce the first wide-field dynamic laser speckle imaging (DLSI) in which we are able to quantify the laser speckleintensity temporal auto-
D. Postnov +4 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Iron‐based metallic glass alloys exhibit excellent soft‐magnetic properties, and unprecedented geometrical freedom in the design of soft‐magnetic metallic glass components is made possible by additive manufacturing. An efficient workflow for developing parameters for laser‐based powder bed fusion of a Fe‐based metallic glass alloy is presented along ...
Julia Löfstrand +7 more
wiley +1 more source
A ghost imaging framework based on laser mode speckle pattern for underwater environments
Communications EngineeringDue to the complex physical processes found in underwater environments, such as absorption, scattering, and noise, it is challenging to obtain high-quality images using conventional camera-based imaging techniques.
Mo-Chou Yang +3 more
doaj +1 more source
Laser speckle reduction based on angular diversity induced by Piezoelectric Benders [PDF]
Journal of the European Optical Society-Rapid Publications, 2013 Speckle reduction techniques have been investigated in display systems with coherent light sources. We propose a simple but efficient method to reduce speckle via two fast vibrating piezoelectric benders.
Ouyang G. +4 more
doaj +1 more source
The dependence of speckle contrast on velocity: a numerical study
Journal of the European Optical Society-Rapid Publications, 2022 We study how the speckle contrast depends on scatterer velocity, with the goal of further developing laser speckle imaging as a quantitative measurement technique. To that end, we perform interferometric computer simulations on a dilute plug flow.
van As Kevin +4 more
doaj +1 more source