Results 51 to 60 of about 26,542 (324)

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, A. F. Abouraddy, D. Magatti, E. Brambilla, F. Ferri, J. W. Goodman, L. A. Lugiato, M. Bache   +7 more
core   +2 more sources

Spatiotemporal laser speckle contrast analysis for blood flow imaging with maximized speckle contrast

Journal of Biomedical Optics, 2010
Laser speckle contrast imaging is a technique used for imaging blood flow without scanning. Though several studies have attempted to combine spatial and temporal statistics of laser speckle images for reducing image noise as well as preserving acceptable spatiotemporal resolution, the statistical accuracy of these spatiotemporal methods has not been ...
Jianjun, Qiu, Pengcheng, Li, Weihua, Luo, Jia, Wang, Hongyan, Zhang, Qingming, Luo   +5 more
openaire   +2 more sources

Multi-scale laser speckle contrast imaging of microcirculatory vasoreactivity [PDF]

Biomedical Optics Express, 2022
Laser speckle contrast imaging is a robust and versatile blood flow imaging tool in basic and clinical research for its relatively simple construction and ease of customization. One of its key features is the scalability of the imaged field of view.
Blaire Lee, Olga Sosnovtseva, Charlotte M. Sørensen, Dmitry D. Postnov   +3 more
openaire   +4 more sources

Depth of Field Extension in Laser Speckle Contrast Imaging

IEEE Access, 2020
A new technique that can increase the depth of field (DOF) for in vivo tissue imaging is presented. Extended DOF for the imaging of strongly scattering media is realized through combining laser speckle contrast imaging (LSCI) with light field (LF ...
Xiaohui Ma, Anting Wang, Fenghua Ma, Shuimei Wu, Hai Ming, Qiwen Zhan   +5 more
doaj   +1 more source

Laser Doppler holographic microscopy in transmission: application to fish embryo imaging [PDF]

, 2014
We have extended Laser Doppler holographic microscopy to transmission geometry. The technique is validated with living fish embryos imaged by a modified upright bio-microcope.
Alexandre, Daniel, Gross, Michel, Verrier, Nicolas   +2 more
core   +3 more sources

Coherent Matrix-Based Approach for Evaluation of First-Order Speckle Intensity Statistics and Its Application for Speckle Suppression

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, Anatoliy Lapchuk, Zichun Le, Di Cai, Jun Zhou, Zongshen Liu, Ivan Gorbov, Andriy Kryuchyn   +7 more
doaj   +1 more source

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., Breugem A.J., F. Scheffold, Goodman J.W., Lenke R., Lindner P., P. Zakharov, Skipetrov S.E., Weitz D.A.   +8 more
core   +2 more sources

Logarithmic intensity and speckle-based motion contrast methods for human retinal vasculature visualization using swept source optical coherence tomography [PDF]

, 2012
We formulate a theory to show that the statistics of OCT signal amplitude and intensity are highly dependent on the sample reflectivity strength, motion, and noise power.
Cense, Fingler, Flammer, Friedman, Hope-Ross, Karamata, Lee, Liu, Liu, Makita, Makita, Mariampillai, Mariampillai, Patel, Pierce, Pircher, Schmitt, Schmoll, Szkulmowska, Vakoc, Vakoc, Wang, Wang, Wojtkowski, Yannuzzi, Yasuno   +25 more
core   +2 more sources

Investigation of speckle pattern dynamics by laser speckle contrast imaging [PDF]

Biophotonics: Photonic Solutions for Better Health Care VI, 2018
Laser speckle contrast imaging (LSCI) is a simple and quite powerful method for visualization of flow, microcirculation and perfusion. In current study the speckle contrast variations towards breaking ergodicity conditions are considered with a final aim of envision a practical approach allowing real-time imaging of variations in dynamic properties of ...
Sdobnov, A. (Anton), Bykov, A. (Alexander), Popov, A. (Alexey), Zherebtsov, E. (Evgeny), Meglinski, I. (Igor)   +4 more
openaire   +3 more sources

Dual-Wavelength Confocal Laser Speckle Contrast Imaging Using a Deep Learning Approach

Photonics
This 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, Haohan Zheng, Honghui He, Shiguo Li, Cong Qiu, Weifeng Zhang, Guoqing Wang, Xingquan Li, Lan Ma, Shuhao Shen, Yuan Zhou   +10 more
doaj   +1 more source