Wyniki wyszukiwania - BazTech

1

Controlling and manipulation of red blood cells by evanescent waves

Angelsky O. V., Zenkova C. Y., Maksymyak P. P., Maksymyak A. P., Ivanskyi D. I.

Optica Applicata

|

2019

|

Vol. 49, nr 4

597--611

EN

A theoretical model for describing the influence of the evanescent wave on the red blood cell (RBC, erythrocyte) in the blood plasma is suggested in this research work. Two optical schemes for creating an evanescent wave and the features of the created field’s effect on the erythrocyte are considered. The conditions for the formation of optical forces and optical momentum, in particular, of the vertical spin of the evanescent wave, which causes a transverse displacement of the erythrocyte, are proposed. The use of a linearly polarized plane wave with azimuth of ±45° in a model experiment, specially suggested in this work, allows for visualization of the transverse controlled motion of the erythrocyte, which enables to claim about new possibilities for controlling microobjects in biology and medicine.

2

Interference coloring of regularly scattered white light

Angelsky O.V., Bogatyryova H.V., Polyanskii P.V

Optica Applicata

|

2008

|

Vol. 38, nr 2

431-444

EN

Interference coloring of the regular component of a polychromatic light scattered by a colorlessdielectric slab with a rough surface is considered. To explain the observed alternation of colors as the depth of roughness grows, we apply the model of a transient layer associated with surfach roughness, which extends the well-known analogy between the layer and a light-scattering particle. It is shown that coloring of the forward-scattered component of a white light can be interpreted as the action of a peculiar quarter-wavelength (anti-reflecting) layer for some spectra component of a polychromatic probing beam. By applying the modern chromascopic technique, we compare the coloring of the forward-scattered and the specularly reflected radiation. As the demonstration, the effect of "a blue Moon" and "a red Moon" caused by the spectral changes induced by white-light scattering at the rough surface of a colorless glass is represented. - Natura simplex et fecunda, A. Fresnel.

3

Scattering-induced spectral changes as a singular optical effect

Polyanskii V.K., Angelsky O.V., Polyanskii P.V.

Optica Applicata

|

2002

|

Vol. 32, nr 4

843-848

EN

Scattering-induced spectral changes observed in the forward-scattered component of polychro- matic radiation transmitted trough a colourless transparent plate with a surface roughness comparable with the wave length of some spectral component of the probing beam are represented as peculiar effect of singular optics. Spectral modifier governing this process and providing blue -shift or red-shift of spectrum is specified. Scattering-induced spectral changes are both shown numerically and demonstrated.

4

Laser polarization visualization and selection of biotissue images

Angelsky O.V., Ushenko A.G., Burkovets D.N., Ushenko Y.A.

Optica Applicata

|

2002

|

Vol. 32, nr 4

591-601

EN

This paper is devoted to the analysis and experimental testing of the concept of laser polarization biotissue probing. The methods of increasing the signal-to-noise ratio in coherent images of the optically anisotropic architectonics of the morphological biotissue structure are considered. The possibilities of polarization selection and contrasting of such images screened by other biotissues are examined. The influence of the depolarization degree of the scattered background on the signal -to-noise ratio is investigated. The possibilities of polarization correction of the probing beam for contrasting biotissue images are analyzed.

5

Automatic polarimetric system for early medical diagnosis by biotissue testing

Jóźwicki R., Patorski K., Angelsky O.V., Ushenko A.G., Burkovets D.N., Ushenko Y.A.

Optica Applicata

|

2002

|

Vol. 32, nr 4

603-612

EN

An automatic polarimetric system constructed at the Optical Engineering Division of the Warsaw University of Technology (Poland) and the evaluation method developed at the Department of Correlation Optics of Chernivtsi State University (Ukraine) are presented. The polarimeter has been designed and constructed to test the biotissues in the form of biopsy samples. After the system autocalibration the isocline and isochrome images are registered automatically. Correlation characteristics of the images calculated by the computer program provide the basis for formulating the medical diagnosis.