Results 21 to 30 of about 2,012,293 (294)
Photothermal laser speckle imaging [PDF]
Optics Letters, 2014 The analysis of speckle contrast in a time-integrated speckle pattern enables visualization of superficial blood flow in exposed vasculature, a method we call laser speckle imaging (LSI). With current methods, LSI does not enable visualization of subsurface or small vasculature, because of optical scattering by stationary structures.
Regan, Caitlin +2 more
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Scientific Reports, 2021 The artefact known as speckle can plague numerous imaging applications where the narrow linewidth of laser light is required, which includes laser projection and medical imaging.
D. Hansford +3 more
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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
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Italian National Conference on Sensors, 2021 The laser speckle correlation method has found widespread application for obtaining information from vibrating objects. However, the resolution and accuracy of the laser speckle correlation method as they relate to the defocusing degree have not been ...
Wenxin Hu +4 more
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Awake chronic mouse model of targeted pial vessel occlusion via photothrombosis [PDF]
, 2020 Animal models of stroke are used extensively to study the mechanisms involved in the acute and chronic phases of recovery following stroke. A translatable animal model that closely mimics the mechanisms of a human stroke is essential in understanding ...
Boas, David A. +9 more
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Speckle free laser imaging [PDF]
Conference on Lasers and Electro-Optics 2012, 2012 Many imaging applications require increasingly bright illumination sources, motivating the replacement of conventional thermal light sources with light emitting diodes (LEDs), superluminescent diodes (SLDs) and lasers. Despite their brightness, lasers and SLDs are poorly suited for full-field imaging applications because their high spatial coherence ...
Redding, Brandon +2 more
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Magnetomotive laser speckle imaging [PDF]
Journal of Biomedical Optics, 2010 Laser speckle imaging (LSI) involves analysis of reflectance images collected during coherent optical excitation of an object to compute wide-field maps of tissue blood flow. An intrinsic limitation of LSI for resolving microvascular architecture is that its signal depends on relative motion of interrogated red blood cells.
Jeehyun, Kim +2 more
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Surface Roughness Measurement Using Dichromatic Speckle Pattern: An Experimental Study [PDF]
, 1978 Surface roughness is studied experimentally by making use of the statistical properties of dichromatic speckle patterns. The rms intensity difference between two speckle patterns produced by two argon laser lines are analyzed in the far field as ...
Fujii, Hitoshi, Lit, John W.Y.
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Objective speckle displacement resulting from the deformation of shaped objects [PDF]
, 2015 This paper describes an extended theory of the displacement of the objective speckle pattern resulting from displacement and/or deformation of a coherently illuminated diffuse object where the influence of the surface shape is included via the linear ...
Charrett, Thomas O. H., Tatam, Ralph P.
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Real-time monitoring of bacterial growth kinetics in suspensions using laser speckle imaging
Scientific Reports, 2020 In microbiology, monitoring the growth of any microorganism in culture is important for studying and optimizing the growth kinetics, the biomass and the metabolite production.
Hadi Loutfi +6 more
semanticscholar +1 more source