Anna Khoroshun

Anna Khoroshun
East Ukraine Volodymyr Dahl National University, Severodonetsk, Ukraine

Ass. Prof.

About

41
Publications
2,987
Reads
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225
Citations
Introduction
Numerical simulation and experimental skills in studying interference and diffraction phenomena with linearly polarised light
Additional affiliations
December 2002 - December 2006
National Academy of Sciences of Ukraine
Position
  • PhD Student
Description
  • Supervisor Prof. Vasnetsov M.V. Consultant Prof. Gorshkov V.N.

Publications

Publications (41)
Article
Models for predicting the number of patients with COVID-19 using machine learning methods have been built. The data for models are obtained from various official sources, including the World Health Organization, from the beginning of the epidemic to the present time. The data in Ukraine and India were selected to teach models for predicting the num...
Chapter
Cleanrooms are the necessary requirement for the further development of mankind in such areas as microelectronics, the pharmaceutical industry, biotechnology, medical device manufacturing and the space industry. The technique of clean rooms in solving these problems should provide control and reduction of particles and microorganisms and gas inclus...
Conference Paper
Full-text available
The effectiveness of the Machine Vision System is estimated by fuzzy logic model. It is designed as a hierarchical structure with two inputs "Performance" and "Reliability" and one output "Effectiveness». The way of estimation of the MVS performance is based on the results of the risk assessment for five optical laboratories. It is developed the re...
Chapter
The rapid development and use of optical systems in measurement, navigation, and space technology to obtain accurate and detailed information about an object of observation is accompanied by the problems of transmitting high quality information through the optical system and processing of the obtained data. Integration of artificial intelligence sy...
Article
Full-text available
Розроблено методи підтримки прийняття рішень для задач з прикладної оптики, в яких необхідно прийняти рішення щодо якості зображення та його відповідності до вимог, котрі визначаються за його подальшим використанням. Обговорено вибір каліброваного теоретичного зображення за яким перевіряється правильність проведення розрахункової роботи. Наведено а...
Article
We study positions and morphology of optical vortices (OVs) within the field obtained after transmitting a circular single-charged OV-beam through the transparent screen with a rectilinear π-phase step. Experimental results are obtained with the help of a programmable spatial light modulator which is used for the Kummer beam formation and for intro...
Article
Full-text available
В роботі розроблено метод опису явища дифракції по сукупності топологічних об’єктів за допомогою системного аналізу. Топологічними об'єктами дифракційного поля є максимум, мінімум і нуль інтенсивності, що тотожній фазовій сингулярності або оптичному вихору. Розглянуто математичне представлення топологічних об’єктів, визначення яких у полі проводить...
Article
Full-text available
The work is aimed at establishing the boundaries of the use of models for describing signals in optoelectronic systems in calculating efficiency. A description of the signal formation process is proposed, taking into account the corpuscular and wave properties when registering signals in a wide range of intensities. A description of the statistical...
Conference Paper
Full-text available
Program application for the automatic intelligent registration of a mi-croparticle moving is an important task for solving the problem of machine vision system development. The video file with particle movement is cut on frames. Every frame is passed to the preliminary analysis based on its noise to signal value, contrast measuring and statistical...
Chapter
Full-text available
We describe the "functional" beam splitter that divides the incident beam into several "derivative" ones and simultaneously introduces the prescribed transformation of their transverse profiles. The splitter is based on the diffraction grating with the groove bifurcation (DGGB) and produces beams with optical vortices (OV) from incident beams with...
Article
We study the system of phase singularities ('singular skeleton') formed when a quasi-plane wave (QPW) input beam diffracts at a double-phase-ramp (DPR) converter. The external (OV positions and 3D trajectories) and internal (ellipticity and orientation angle of the equal-intensity ellipses in the OV-core area) singular-skeleton features are investi...
Article
Based on the Kirchhoff-Fresnel approximation, we numerically analyze spatial characteristics of the light field formed after a circular Laguerre-Gaussian beam with a single-charged optical vortex (OV) passes the transparent screen with a rectilinear phase step. The main attention is paid to the localization and interactions of the OVs, which form t...
Preprint
Based on the Kirchhoff-Fresnel approximation, we numerically analyze spatial characteristics of the light field formed after a circular Laguerre-Gaussian beam with a single-charged optical vortex (OV) passes the transparent screen with a rectilinear phase step. The main attention is paid to the localization and interactions of the OVs, which form t...
Article
A full theoretical and experimental analysis of the chain of phase singularities generated when a Gaussian beam passes a double-phase-ramp converter is presented. The overall output beam structure includes a system of interrelated optical vortices (OVs) whose trajectories form a three-dimensional singular skeleton that can be applied for the trappi...
Article
We analyze transformations of circular Laguerre-Gaussian beams with zero radial index after passage through the double-phase-ramp (DPR) converter and study the behavior of optical vortices in the propagating transformed beam. Direct and inverse DPR converters are considered, and informative features of the complete set of optical vortices are revea...
Article
Edge diffraction of a circular optical vortex (OV) beam transforms its singular structure: a multicharged axial OV splits into the set of single-charged ones that form the 'singular skeleton' of the diffracted beam. The OV positions in the beam cross section depend on the propagation distance as well as on the edge position with respect to the inci...
Article
Based on the Kirchhoff-Fresnel approximation, we consider behavior of the optical vortices (OV) upon propagation of the diffracted Laguerre-Gaussian (LG) beams with topological charge |m| = 1, 2. Under conditions of weak diffraction perturbation (i.e. the diffraction obstacle covers only the far transverse periphery of the incident LG beam), the OV...
Conference Paper
We study, both theoretically and by experiment, migration of the amplitude zeros within a fixed cross section of the edge-diffracted optical-vortex beam, when the screen edge performs permanent translation in the transverse plane from the beam periphery towards the axis. Generally, the amplitude zeros (optical-vortex cores) describe spiral-like tra...
Article
Full-text available
We study, both theoretically and by experiment, migration of the amplitude zeros within a fixed cross section of the edge-diffracted optical-vortex beam, when the screen edge performs permanent translation in the transverse plane from the beam periphery towards the axis. Generally, the amplitude zeros (optical-vortex cores) describe spiral-like tra...
Article
Full-text available
The behavior of an axial optical vortex (OV), which is generated with the use of a Gaussian beam and two ramps implemented by a phase-only spatial light modulator (SLM), is studied as a function of the parameters of two ramps. The analytic solution of a wave equation is obtained in the Fresnel approximation for the diffraction of a Gaussian beam on...
Conference Paper
We present the experimental and numerical study of the transverse profile for a beam obtained by the screen-edge diffraction of optical-vortex (OV) Kummer beams with topological charges 1, 2 and 3, generated with the help of a “fork” hologram. The main results concern the behavior of the secondary OVs formed in the diffracted beam due to splitting...
Article
Full-text available
When a circularly-symmetric light beam with optical vortex (OV) diffracts at an opaque screen with the sharp edge, the OV core is displaced from the beam axis and, in case of the m-charged incident OV, decomposed into |m| single-charged ones. By means of numerical simulations and based on examples of incident beams with topological charges |m| =1,...
Chapter
Full-text available
Lateral shearing interferometry is an important area of general interferometry. It is widely used for testing optical components and systems and for studying flow and diffusion phenomena in gases and liquids. This method provides highly accurate and simple measurements by the standard optical laboratory equipment. The main advantages of a single-ar...
Article
Full-text available
Synthesis of an axial optical vortex (OV) beam using a Gaussian beam and two ramps implemented by a spatial light modulator (SLM) is realized. Similar phase construction on an irregular thin plate receiving the OV beam is achieved. Angle dependences between two ramps and the characteristics of resulting field with respect to the observation distanc...
Article
The optimum parameters are determined for a shearing interferometer with a singular light source to give the best visibility on the interferograms of the regions where the fringes of equal thickness split, the position of which makes it possible to determine the lateral shear of the beams and the characteristics of the beamsplitter element.
Article
Full-text available
The functions of phase wedge and symmetric phase mask for optical vortex synthesised from a Gaussian beam are carefully analysed. The optimal linear phase dependence in the cross-section of a Gaussian beam for the singular beam with a single charge synthesis is found. The similarity of the obtained beam phase and intensity distributions in the sing...
Article
Full-text available
It is suggested to use a singular beam of unit topological charge in a scheme of vortex shearing interferometer intended for the observation of isoclinic fringes. In the interference pattern, the regions of fringe splitting determine the localization of wavefront dislocations and exhibit a shift that depends on the beam splitter rotation angel. Usi...
Article
Full-text available
We demonstrated in theory and experiment superluminal properties of optical field propagation in the shadow area behind an opaque disk (Poisson's spot). The wave front of the field in the shadow zone is initially delayed with respect to unperturbed field. This phase shift gradually diminishes along the optical path, and therefore insures variation...
Article
Full-text available
The “classical” problem of plane-wave diffraction by a circular opening is inspected with one particular interest to check the existence of axial zeroes of amplitude, which can produce a specific type of phase singularities. We investigate the problem using paraxial and nonparaxial solutions of scalar wave equation based on Hankel transform. The ma...
Article
It is advanced a two-dimensional model for investigation of spatial dynamics of stationary light fields with disruption of a wave front including optical vortices or with pronounced amplitude inhomogeneity. Theory of synthesis of optical vortices in a Gaussian beam by an optical wedge is developed. Optimum wedge parameters for high efficiency gener...

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Projects

Projects (2)
Project
To develop IT of decision support system in Optics and Laser Physics. Optical Metrology Project Expert contains 10 components for describing research and 10 components with decision support methods.
Project
Reveal the micro peculiarities of optical vortices trajectories in the diffracted field. Predict their features on different distances from the initial plane. Obtained results due to higher sensitivity of the optical vortex position to the small changes in the field can be applied for OV metrology.