Results 11 to 20 of about 81,544 (300)
Intrinsic speckle noise in in-line particle holography due to poly-disperse and continuous particle sizes [PDF]
, 2000 In-line particle holography is subject to image deterioration due to intrinsic speckle noise. The resulting reduction in the signal to noise ratio (SNR) of the replayed image can become critical for applications such as holographic particle velocimetry ...
Rodgers, GJ, Edwards, PJ, Hobson, PR
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Singularities in speckled speckle [PDF]
Optics Letters, 2008 Speckle patterns produced by random optical fields with two (or more) widely different correlation lengths exhibit speckle spots that are themselves highly speckled. Using computer simulations and analytic theory we present results for the point singularities of speckled speckle fields: optical vortices in scalar (one polarization component) fields; C ...
Freund, Isaac, Kessler, David A.
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Singularities in speckled speckle: screening [PDF]
Journal of the Optical Society of America A, 2008 We study screening of optical singularities in random optical fields with two widely different length scales. We call the speckle patterns generated by such fields speckled speckle, because the major speckle spots in the pattern are themselves highly speckled.
Kessler, David A., Freund, Isaac
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Dynamic properties of speckled speckles [PDF]
SPIE Proceedings, 2010 We consider the dynamical properties of speckles observed through a second static diffuser arising from a linear or angularly displaced first diffuser. Analytical expressions are obtained for general situations where both the space between the displaced and the static diffuser and the space between the static diffuser and the plane of observation ...
G. Hanson, Steen +2 more
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Optics Express, 2020 Speckle is the spatial fluctuation of irradiance seen when coherent light is reflected from a rough surface. It is due to light reflected from the surface’s many nooks and crannies accumulating vastly discrepant time delays, spanning much more than an optical period, en route to an observation point.
Justin Dove, Jeffrey H. Shapiro
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Singularities in speckled speckle: Statistics [PDF]
Optics Communications, 2008 Random optical fields with two widely different correlation lengths generate far field speckle spots that are themselves highly speckled. We call such patterns speckled speckle, and study their critical points (singularities and stationary points) using analytical theory and computer simulations.
Freund, Isaac, Kessler, David A.
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Physical Review E, 2010 We have measured the local and global statistics of singularity velocity, v, and have related these through the spatial correlation function of v. The distribution of v is a mixture of a mesoscopic distribution of global change in the speckle pattern and the distribution for v for Gaussian random fields.
Zhang, Sheng +2 more
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Proceedings of the 3rd International ICST Conference on Body Area Networks, 2008 This paper describes the application of the first fully wireless network of inertial sensors for full-body 3-D motion capture -- the Orient-2 system, to real-time on-body analysis of the golf swing. The golfer-club system is modelled as a double pendulum.
D. K. Arvind 0001, Andrew Bates
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Cold Spring Harbor Perspectives in Biology, 2010 Nuclear speckles, also known as interchromatin granule clusters, are nuclear domains enriched in pre-mRNA splicing factors, located in the interchromatin regions of the nucleoplasm of mammalian cells. When observed by immunofluorescence microscopy, they usually appear as 20-50 irregularly shaped structures that vary in size.
Spector, David L., Lamond, Angus I.
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Material characterization by laser speckle photometry
, 2022 Paper 841315The damage and stress conditions of large industrial components have to be tested continuously. Especially welding processes in the field of coal production demand a nondestructive monitoring of internal stresses under an external load.
Cikalova, U., Schreiber, J., Bendjus, B.
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