Results 251 to 260 of about 2,012,293 (294)
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Laser Physics Letters, 2020
We report a compact, low cost, multi-color diode laser based illumination system for display and laser-projectors. An innovative speckle reduction system based on spatially structured and temporally varying beams was designed and developed. Three primary
Virendra Kumar +5 more
semanticscholar +1 more source
We report a compact, low cost, multi-color diode laser based illumination system for display and laser-projectors. An innovative speckle reduction system based on spatially structured and temporally varying beams was designed and developed. Three primary
Virendra Kumar +5 more
semanticscholar +1 more source
Surgical Innovation, 2019
Background. The main limitation of perfusion assessment with indocyanine green fluorescence angiography during colorectal surgery is that the surgeon assesses the quality of perfusion subjectively.
Shigehiro Kojima +5 more
semanticscholar +1 more source
Background. The main limitation of perfusion assessment with indocyanine green fluorescence angiography during colorectal surgery is that the surgeon assesses the quality of perfusion subjectively.
Shigehiro Kojima +5 more
semanticscholar +1 more source
A review of surface roughness measurements based on laser speckle method
Journal of Iron and Steel Research International, 2023Mei-qi Shao +8 more
semanticscholar +1 more source
Simple diffuser for production of laser speckle
Applied Optics, 1989A passive optical element that is a simple, inexpensive, and effective way for producing laser speckle is described. The optical element, a random phase plate, was developed in our laboratory. The statistics of the speckle pattern it produces were measured and are discussed in this paper. The phase plate was used to produce a speckled beam using a 5-mW
K D, Bonin, M A, Kadar-Kallen
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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
semanticscholar +1 more source
Diffusive media characterization with laser speckle
Applied Optics, 1997The statistical properties of laser speckle with partially coherent light are related to the scattering characteristics of an optically diffuse material. A diffusion equation model is shown to yield a speckle contrast ratio that agrees well with measurements of opaque plastics of varying thicknesses. We show that partially coherent light can be used to
C A, Thompson, K J, Webb, A M, Weiner
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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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Optics and lasers in engineering, 2018
Background radiation and airflow disturbance at high temperature reduce the quality of captured images, resulting in a lot of noises in the displacement field obtained by digital image correlation (DIC) and decreased accuracy of strain measurement.
Jinlian Song +3 more
semanticscholar +1 more source
Background radiation and airflow disturbance at high temperature reduce the quality of captured images, resulting in a lot of noises in the displacement field obtained by digital image correlation (DIC) and decreased accuracy of strain measurement.
Jinlian Song +3 more
semanticscholar +1 more source
LASER SPECKLE PHOTOGRAPHY FOR HEAT TRANSFER
Experimental Thermal and Fluid Science, 1993ABSTRACT Laser speckle photography, as a technique making use of the displacement of optical speckle by refraction as information carrier, is recently used to measure fluid density, temperature and heat transfer. The concept of laser speckle photography and the measuring principle of temperature gradient field are briefly described.
Zeng-Yuan Guo, Yao-Zu Song
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Laser speckle contrast imaging in neurosurgery: a systematic review.
World Neurosurgery, 2022A. Konovalov +8 more
semanticscholar +1 more source