Caption: Figure 2--DIC speckle pattern
on an ASTM D638 type IV tensile specimen
Optical fiber specklegram sensor analysis by speckle pattern
Caption: Fig.8 Nulls are eyes of vortices threading an optical volume, shown in this 3D speckle pattern
. The nulls (oD) form a dendritic tree, rising through 1D and 2D to fill the 3D volume.
before and after deformation are assumed to be the sum of individual Gaussian speckles with random distribution.
In Figure 2(a), we present a plot of the speckle pattern
of the scattered field as a function of the scattering angle [[theta].sub.s] produced by a monochromatic p-polarized Gaussian beam of frequency [[omega].sub.0], given by (6) with F([omega]) = 2[pi][delta]([omega] - [[omega].sub.0]), incident on a single realization of a one-dimensional randomly rough interface generated with the use of (27).
[3.] Schajer GS, Steinzig, M, "Full-field Calculation of Hole Drilling Residual Stresses from Electronic Speckle Pattern
Interferometry Data", Experimental Mechanics 2005; 45: 6, pp 526-532.
Random scatting strongly distorts the optical fields, creating the well-known speckle pattern
. The speckle pattern
is formed by superposing all the random optical fields.
The full-field deformation in the notched discs was obtained owing to the application of the DIC method, which relies on a contrasting random texture as a speckle pattern
on the surface of the specimen .
LASCA is based on the principle that when an object is illuminated by a coherent light, such as laser, the light will be scattered by a collection of randomly distributed particles to produce a characteristic random interference pattern known as a speckle pattern
that consists of light and dark areas (21).
The compression of the pressure pad (for the chest compressions) by the operator bends the fibre optic by different amounts and therefore changes the laser speckle pattern
produced at the end of the optic.
The lens creates a speckle pattern
that can be scanned on the object.
The team also observed how roton excitations affect the superfluidity by dragging a laser speckle pattern
across the superfluid.
A speckle pattern
is projected on a part while it's still attached to the build plate and the part is imaged by two cameras.
Among their topics are non-destructive testing applications in engineering, principles of digital speckle pattern
interferometry, the quantitative evaluation of stresses and strains, qualitative fault detection and evaluation, and digital image correction for structural monitoring.
When the material that is scattering the light is moving-say, in the case of blood flowing through the circulatory system-"the speckle pattern
changes with changes in the flow," explained biomedical engineer Mahsa Nemati, a graduate student in the Optics Research Group at the Delft University of Technology in the Netherlands and the lead author of the Biomedical Optics Express paper on monitoring pulse.