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Real-time laser speckle photography
Applied Optics, 1984Une figure de speckle de reference est produite en prenant un hologramme a une seule exposition de l ...
F P, Chiang, Q B, Li
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Accelerated Laser Speckle Strain Gauge
Optical Engineering, 1985An improved version of the laser speckle strain gauge is presented in which speckle displacement caused by deformation of a laser illuminated object is detected in real time using new photodetectors in place of linear image sensors and microcomputer in the conventional version.
Ichirou Yamaguchi +3 more
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Single shot laser speckle based 3D acquisition system for medical applications
Optics and lasers in engineering, 2018The state of the art techniques used by medical practitioners to extract the three-dimensional (3D) geometry of different body parts requires a series of images/frames such as laser line profiling or structured light scanning.
Danish Khan +2 more
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Polarization microstatistics of laser speckle
Physical Review A, 1992The microstatistics of laser speckle has been investigated under varying incident polarization angle θ. The intensity at each point in a speckle pattern varies sinusoidally with θ and can be described completely by three parameters: amplitude, baseline, and relative phase.
, Tarhan, , Watson
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Laser Speckle Displacement Cardiography
Journal of Optics, 1986Laser speckle is an interference phenomenon which is the result of the interference of the scattered radiations due to the roughness of the surface. By the superposition of the speckle patterns during systolic phase of the cardiac cycle, by time average speckle interfocometry and point-wise filtering methods, the absolute displacements at various ...
Megha Singh +2 more
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A review of surface roughness measurements based on laser speckle method
Journal of Iron and Steel Research International, 2023Mei-qi Shao +8 more
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Laser Speckle Micro-angiography
Digital Holography & 3-D Imaging Meeting, 2015We introduce a laser speckle micro-angiography (LSMA) to reconstruct the 2D visualization of the blood flows. In vivo Biological experiments on the ears of rabbits and mice verify the outstanding performance of our LSMA in imaging microcirculatory network.Provided an potential to develop a label-free optical micro-angiography in retinal imaging.
Riwei Liao, Dingan Han, Yaguang Zeng
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Three-dimensional dimension of laser speckle
Applied Optics, 1992It is well known that the three-dimensional dimension of laser speckle is a critical parameter in laser holographic interferometry, laser speckle photography, and holospeckle interferometry. In this paper a statistical analysis for computing the three-dimensional dimension of laser speckle is presented.
Q B, Li, F P, Chiang
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Laser speckle contrast imaging in neurosurgery: a systematic review.
World Neurosurgery, 2022A. Konovalov +8 more
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Fluctuations of temporal contrast in laser speckle imaging of blood flow.
Optics Letters, 2018Laser speckle contrast imaging can be used to estimate changes in blood flow velocity in either the spatial or temporal domain. Temporal speckle contrast analysis provides higher spatial resolution than spatial speckle contrast does.
Jiachi Hong +4 more
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