Results 41 to 50 of about 234,282 (231)
Choosing a laser for laser speckle contrast imaging [PDF]
Scientific Reports, 2019 AbstractThe use of laser speckle contrast imaging (LSCI) has expanded rapidly for characterizing the motion of scattering particles. Speckle contrast is related to the dynamics of the scattering particles via a temporal autocorrelation function, but the quality of various elements of the imaging system can adversely affect the quality of the signal ...
Dmitry D. Postnov +3 more
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Laser Speckle Modeling and Simulation for Biophysical Dynamics: Influence of Sample Statistics
Journal of Biomedical Photonics & Engineering, 2017 Laser speckle is a statistical phenomenon and should be treated as such when establishing experimental parameters for using laser speckle techniques to infer information about the dynamics of a coherently illuminated medium, such as biological tissue ...
Kosar Khaksari, Sean J. Kirkpatrick
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Zwitterion-doped liquid crystal speckle reducers for immersive displays and vectorial imaging
Light: Science & Applications, 2023 Lasers possess many attractive features (e.g., high brightness, narrow linewidth, well-defined polarization) that make them the ideal illumination source for many different scientific and technological endeavors relating to imaging and the display of ...
Yihan Jin +6 more
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A new simulation method for laser speckle imaging to investigate hemodynamics [PDF]
E3S Web of Conferences, 2019 Speckle simulation is a powerful protocol to investigate the properties of speckle and evaluate image processing method. However, only static speckle images can be simulated by available methods without considering time-integrated effect of CCD.
Sang X, Li D, Chen B
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Laser speckle contrast imaging compared with indocyanine green in renal perfusion of a porcine model
Current Urology, 2023 . Background. When viewed under near-infrared light, indocyanine green (ICG) signal for kidney perfusion can be utilized in partial nephrectomy. Laser speckle contrast imaging (LSCI) uses coherent light to detect perfusion during real-time laparoscopic ...
Jonathan Noël +10 more
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Experimental evidence of high-resolution ghost imaging and ghost diffraction with classical thermal light [PDF]
, 2004 High-resolution ghost image and ghost diffraction experiments are performed by using a single source of thermal-like speckle light divided by a beam splitter. Passing from the image to the diffraction result solely relies on changing the optical setup in
A. Gatti +7 more
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IEEE Photonics Journal, 2022 The existing approach for evaluating the statistical characteristics of speckle intensity distribution is applicable only to completely decorrelated laser beams.
Qiyong Xu +7 more
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Normalized ghost imaging [PDF]
, 2012 We present an experimental comparison between different iterative ghost imaging algorithms. Our experimental setup utilizes a spatial light modulator for generating known random light fields to illuminate a partially-transmissive object.
Baoqing Sun +15 more
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Underwater environment laser ghost imaging based on Walsh speckle patterns
Frontiers in Physics, 2023 Underwater imaging is a challenging task because of the effects of scattering and absorption in water. Ghost imaging (GI) has attracted increasing attention because of its simple structure, long range, and achievability under weak light intensity.
Mochou Yang, Yi Wu, Guoying Feng
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Monitoring spatially heterogeneous dynamics in a drying colloidal thin film [PDF]
, 2010 We report on a new type of experiment that enables us to monitor spatially and temporally heterogeneous dynamic properties in complex fluids. Our approach is based on the analysis of near-field speckles produced by light diffusely reflected from the ...
Berne B.J. +8 more
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