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1
Content available Optical sizing of cement particles
Gorsky M. P., Maksimyak P. P.
Optica Applicata
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2017
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Vol. 47, nr 4
511--519
EN
We represent the optical correlation technique of cement particle sizing based on the transverse coherency function measurement using a polarization transverse shearing interferometer. It is shown that a set of particles with random shapes and orientations produces a coherence function, which is the same as a function of the set of spherical particles. The proposed technique of experimental data processing decreases the dependence of the result on interferometer noise, emission source intensity fluctuations and differences in the refraction index of isolated cement particles. The described technique allows fast and high reliable determining of the size distribution function parameters for a set of cement particles.
2
Content available Pseudo-phase mapping of speckle fields using 2D Hilbert transformation
Zenkova C. Y., Gorsky M. P., Ryabiy P. A.
Optica Applicata
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2016
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Vol. 46, nr 1
153--162
EN
The use of a "window" 2D Hilbert transform for the reconstruction of the phase distribution of the intensity of a speckle field is proposed. It is shown that the advantage of this approach consists in the invariance of a phase map to a change of the position of the kernel of transformation and in the possibility to reconstruct the structure-forming elements of the skeleton of an optical field, including singular points and saddle points. We demonstrate the possibility to reconstruct the equi-phase lines within a narrow confidence interval, and introduce an additional algorithm for solving the phase problem for random 2D intensity distributions.
3
Content available Different approaches to phase restoration of distant complex optical fields
Zenkova C. Y., Gorsky M P, Ryabiy P A, Gruia I
Optica Applicata
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2015
|
Vol. 45, nr 2
139--150
EN
The paper presents principal approaches to diagnosing the structure forming skeleton of the complex optical field. An analysis of optical field singularity algorithms depending on intensity discretization and image resolution has been carried out. An optimal approach is chosen, which allows to bring much closer the solution of the phase problem of localization of speckle-field special points. A possible approach to diagnosing the signs of zero amplitudes has been offered.
4
Content available remote Influence of the Brownian movement on the motion of nanoand micro-particles in the inhomogeneous optical field
Zenkova C. Y., Gorsky M. P., Soltys I. V., Angelsky P. O.
Opto-Electronics Review
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2012
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Vol. 20, No. 3
247-254
EN
The motion of light scattering particles of the Mie and Rayleigh micro- and nano-range type in the inhomogeneously-polarized optical field, with allowance made for the Brownian movement, is analysed in the paper. The spatial modulation of polarization in the observation plane determines the spatial modulation of the volume energy density. That is why the velocity and the resulting optical force, which cause the motion of the testing particles, change according to the degree of coherence of the interacting fields. The influence of the forces which arise in the viscous medium and cause the Brownian movement upon the mechanisms of manipulating and trapping testing particles by the optical field is studied.
5
Content available remote Metrology of degree of coherence of circularly polarized optical waves
Zenkova C. Y., Gorsky M. P., Gorodynska N. V.
Opto-Electronics Review
|
2011
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Vol. 19, No. 3
290-295
EN
The use of the method of field polarization modulation for defining the degree of coherence of circularly polarized waves is offered. The role of the reference circularly polarized wave in transforming the spatial distribution of polarization into the depth of visibility modulation of the resulting distribution, which can be metrologically estimated and analyzed, is demonstrated.
6
Content available remote Optical correlation technique for cement particle size measurements
Gorsky M. P., Maksimyak P. P., Maksimyak A. P.
Optica Applicata
|
2010
|
Vol. 40, nr 2
459--469
EN
Optical correlation technique of determining the cement particle size distribution is described. It is based on transverse coherent function measurement using a polarization transverse shearing interferometer. The proposed technique of data processing decreases the dependence of the result on interferometer noise, emission source intensity fluctuations and difference of refractive index magnitudes of different cement particles. The technique allows fast and reliable determination of the size distribution function of cement particles.
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