Results 41 to 50 of about 44,997 (341)
Clinical applications of laser speckle contrast imaging: a review
Journal of Biomedical Optics, 2019 . When a biological tissue is illuminated with coherent light, an interference pattern will be formed at the detector, the so-called speckle pattern. Laser speckle contrast imaging (LSCI) is a technique based on the dynamic change in this backscattered ...
W. Heeman +4 more
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Journal of Innovative Optical Health Sciences, 2021 This paper discusses and studies the composition and characteristics of biospeckle on the surface of bone tissues. We used a laser speckle device to capture biospeckle patterns from fresh pig bone tissue. Traditional speckle activity metrics were used to
Xin Tang +3 more
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IEEE Photonics Journal, 2015 We report on the implementation of a current drive modulation circuitry that is effective in suppressing speckle noise for laser diodes. The drive circuit allows for operating the laser diode current at constant dc or modulating the current with square ...
I. Yilmazlar, M. Sabuncu
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Spatiotemporal characteristics of dynamic speckle from a 3D target in atmospheric turbulence
Heliyon, 2023 Spatiotemporal correlation function is the basic characteristic of dynamic laser speckle and the basis of various applications. The correlation function of the speckle intensity from a 3D target in turbulent atmosphere is derived based on the model of ...
Wang Liguo +5 more
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Physics of Plasmas, 2020 Crossed beam energy transfer, CBET, is investigated by taking into account the speckle structure of smoothed laser beams that overlap in a plasma with an inhomogeneous flow profile.
S. Hüller, G. Raj, W. Rozmus, D. Pesme
semanticscholar +1 more source
Robust quantitative single-exposure laser speckle imaging with true flow speckle contrast in the temporal and spatial domains. [PDF]
Biomedical Optics Express, 2019 A systematic and robust laser speckle contrast imaging (LSCI) method and procedure is presented covering the LSCI system calibration, static scattering removal, and measurement noise estimation and correction to obtain a true flow speckle contrast K f 2 ...
Chen-ge Wang +6 more
semanticscholar +1 more source
Study on Speckle Noise Reduction in Laser Projection Displays
PhotonicsLaser speckle has a negative effect on laser projectors, so reducing laser speckle is crucial for the development of laser projector displays. We primarily focus on studying the laser speckle contrast of laser projector displays and the mechanism for ...
Hongyou Zhang +3 more
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SensiCut: Material-Aware Laser Cutting Using Speckle Sensing and Deep Learning
ACM Symposium on User Interface Software and Technology, 2021 Laser cutter users face difficulties distinguishing between visually similar materials. This can lead to problems, such as using the wrong power/speed settings or accidentally cutting hazardous materials.
Mustafa Doga Dogan +4 more
semanticscholar +1 more source
Different methods for characterizing surface roughness using laser speckle technique
Iraqi Journal of Physics, 2019 In this work, results from an optical technique (laser speckle technique) for measuring surface roughness was done by using statistical properties of speckle pattern from the point of view of computer image texture analysis.
Mayada B. Al-Quzweny
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IEEE Access, 2021 A two-dimensional entropy laser speckle contrast imaging (E-LSCI) algorithm is proposed to improve the accuracy and resolution of laser speckle contrast imaging (LSCI) systems.
Xinglong Liu, Hui Yang, Ran Li
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