Dmytro M. Kartolapov, V. O. Novikov, S. Tymchyk, Olga V. Akimova, Natalia A. Bouhlal
In this paper, a system for read-out sensing and analyzing human brain signals using an encephalograph is considered.Characteristics of human brain signals are considered. Based on this system it is proposed to create a neuro-interface in which the received signals will be analyzed by neural networks.
{"title":"Methods of analysis of encephalograph signals using neural networks","authors":"Dmytro M. Kartolapov, V. O. Novikov, S. Tymchyk, Olga V. Akimova, Natalia A. Bouhlal","doi":"10.1117/12.2617392","DOIUrl":"https://doi.org/10.1117/12.2617392","url":null,"abstract":"In this paper, a system for read-out sensing and analyzing human brain signals using an encephalograph is considered.Characteristics of human brain signals are considered. Based on this system it is proposed to create a neuro-interface in which the received signals will be analyzed by neural networks.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126560334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Kvasnyuk, L. Trifonyuk, A. Strashkevich, N. Kozan, V. Ushenko, O. Dunaiev, V. Kryvetskiy, I. Oliinyk, E. Kurek, V. Tkachuk
The paper presents the results of the possibility of a polarization-interference approach to the analysis of microscopic images polycrystalline blood films of patients of benign and malignant prostate tumours with different degrees of differentiation. Measurements and analysis of maps and histograms of the distribution of the local contrast value of polarization-interference distributions of microscopic images of polycrystalline blood films of patients . Determination of the relationship between the statistical moments of the 1st - 4th orders characterizing the distributions of the local contrast value of the polarization-interference distributions of microscopic images of polycrystalline blood films of patients. Determination of statistical criteria for polarization-interference diagnosis of histological sections of biopsy of adenoma and adenocarcinoma with varying degrees of differentiation. Determination of sensitivity, specificity, accuracy of the polarization interferometry method for differential diagnosis of polycrystalline blood films of patients of adenoma and adenocarcinoma with varying degrees of differentiation.
{"title":"Detection of pathological changes in the architectonics of polycrystalline blood films using laser-induced polarization interferometry","authors":"D. Kvasnyuk, L. Trifonyuk, A. Strashkevich, N. Kozan, V. Ushenko, O. Dunaiev, V. Kryvetskiy, I. Oliinyk, E. Kurek, V. Tkachuk","doi":"10.1117/12.2616837","DOIUrl":"https://doi.org/10.1117/12.2616837","url":null,"abstract":"The paper presents the results of the possibility of a polarization-interference approach to the analysis of microscopic images polycrystalline blood films of patients of benign and malignant prostate tumours with different degrees of differentiation. Measurements and analysis of maps and histograms of the distribution of the local contrast value of polarization-interference distributions of microscopic images of polycrystalline blood films of patients . Determination of the relationship between the statistical moments of the 1st - 4th orders characterizing the distributions of the local contrast value of the polarization-interference distributions of microscopic images of polycrystalline blood films of patients. Determination of statistical criteria for polarization-interference diagnosis of histological sections of biopsy of adenoma and adenocarcinoma with varying degrees of differentiation. Determination of sensitivity, specificity, accuracy of the polarization interferometry method for differential diagnosis of polycrystalline blood films of patients of adenoma and adenocarcinoma with varying degrees of differentiation.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114249603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The features of the use of polarized radiation in the problems of metrology of optical-geometric and structural parameters of light-scattering objects of various physical and chemical nature are described. Experimental situations are revealed that are most relevant for the study of optically anisotropic dispersed media containing particles of various shapes, sizes and orientations. The analytical dependence of the value of the fourth Stokes parameter of circularly polarized radiation passing through a layer of oriented particles with an optical thickness τ < 3 on the degree of their orientation is determined. A method is proposed for assessing the degree of orientation of macromolecules in polymer films, the conformation of biopolymers from the values of f22 components at any scattering angles, and determining the shape of macromolecules at scattering angles greater than α > 30°. Experimental conditions and methods of matrix polarimetry of the process of corrosion of the free surface of a metal and its corrosion under a paint-and-lacquer coating are presented.
{"title":"Features of the use of polarized radiation to assess the structural organization of light-scattering objects","authors":"L. Pidkamin, A. Arkhelyuk, Y. Dobrovolskii","doi":"10.1117/12.2615771","DOIUrl":"https://doi.org/10.1117/12.2615771","url":null,"abstract":"The features of the use of polarized radiation in the problems of metrology of optical-geometric and structural parameters of light-scattering objects of various physical and chemical nature are described. Experimental situations are revealed that are most relevant for the study of optically anisotropic dispersed media containing particles of various shapes, sizes and orientations. The analytical dependence of the value of the fourth Stokes parameter of circularly polarized radiation passing through a layer of oriented particles with an optical thickness τ < 3 on the degree of their orientation is determined. A method is proposed for assessing the degree of orientation of macromolecules in polymer films, the conformation of biopolymers from the values of f22 components at any scattering angles, and determining the shape of macromolecules at scattering angles greater than α > 30°. Experimental conditions and methods of matrix polarimetry of the process of corrosion of the free surface of a metal and its corrosion under a paint-and-lacquer coating are presented.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121088175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
At present, liquid crystals – polymer (LC-P) composites such as polymer-dispersed liquid crystals (PDLC), polymer stabilized liquid crystals (PSLC) and polymer networks in liquid crystals (PNLC) are widely used as operating elements of optical devices such as microlens and elements, whose principle of operation is based on light scattering. LC-P composites light refraction features depend on shape and size of liquid crystal (LC) drops as well as on director orientation inside of drops. LC anisotropy influences polarization characteristics of refracted radiation. We have investigated desined as the tunable microlens on LC-P with different components concentration ratio. We have used LC E7 by Merck, dispersed in the polymer NOA 65 by Norland Inc. as the object of research. They have close refractive indeces which provide the posibility to shange the focal length of such LC lens in wide range. We change focal length by change of applied voltage and by rotation of polarization plane of illuminating beam. Partial beams passed through LC droplets and polymer matrix may be considered as plane waves passing different optical pathes and interfering in the far zone. Changing the voltage results in changing the LC effective refractive index leading to a change of the path difference between the interfering beams. The effect of interference decreases of some spectral components of the radiation passing through LC-P sample can be used as a tunable chromatic lens.
{"title":"Polymer-dispersed liquid crystals forming tunable microlens","authors":"P. Maksimyak, A. Maksimyak, A. Nehrych","doi":"10.1117/12.2615163","DOIUrl":"https://doi.org/10.1117/12.2615163","url":null,"abstract":"At present, liquid crystals – polymer (LC-P) composites such as polymer-dispersed liquid crystals (PDLC), polymer stabilized liquid crystals (PSLC) and polymer networks in liquid crystals (PNLC) are widely used as operating elements of optical devices such as microlens and elements, whose principle of operation is based on light scattering. LC-P composites light refraction features depend on shape and size of liquid crystal (LC) drops as well as on director orientation inside of drops. LC anisotropy influences polarization characteristics of refracted radiation. We have investigated desined as the tunable microlens on LC-P with different components concentration ratio. We have used LC E7 by Merck, dispersed in the polymer NOA 65 by Norland Inc. as the object of research. They have close refractive indeces which provide the posibility to shange the focal length of such LC lens in wide range. We change focal length by change of applied voltage and by rotation of polarization plane of illuminating beam. Partial beams passed through LC droplets and polymer matrix may be considered as plane waves passing different optical pathes and interfering in the far zone. Changing the voltage results in changing the LC effective refractive index leading to a change of the path difference between the interfering beams. The effect of interference decreases of some spectral components of the radiation passing through LC-P sample can be used as a tunable chromatic lens.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123805419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Litvinenko, D. Kvasnyuk, A. Y. Vanchulyak, M. Stashkevich, A. Motrich, A. Y. Mikhailova, M. P. Gorskiy, M. Slyotov
The article contains the results of experimental testing of methods of azimuthal-invariant Mueller-matrix microscopy (Mueller-matrix invariants - MMI) of optically anisotropic fluorophores of samples of histological sections of the brain, liver and kidney, as well as myocardium and lung tissue; temporal detection of variations in the magnitude of the statistical moments of the 1st - 4th orders, characterizing the distributions of the MMI value of linear birefringence and optical activity of samples of histological sections of the brain, liver and kidney, as well as myocardium and lung tissue with different age of damage; determination of the diagnostic efficiency (time interval and accuracy) of establishing the age of damage to human internal organs by digital histological methods of MMI mapping of optical anisotropy of fluorophores in histological sections of the brain, liver and kidney, as well as myocardium and lung tissue.
{"title":"Mueller-matrix microscopy of laser-induced monochromatic fluorescent fields of preparations of human internal organs and histological diagnostics of the time of age of damage formation","authors":"A. Litvinenko, D. Kvasnyuk, A. Y. Vanchulyak, M. Stashkevich, A. Motrich, A. Y. Mikhailova, M. P. Gorskiy, M. Slyotov","doi":"10.1117/12.2616667","DOIUrl":"https://doi.org/10.1117/12.2616667","url":null,"abstract":"The article contains the results of experimental testing of methods of azimuthal-invariant Mueller-matrix microscopy (Mueller-matrix invariants - MMI) of optically anisotropic fluorophores of samples of histological sections of the brain, liver and kidney, as well as myocardium and lung tissue; temporal detection of variations in the magnitude of the statistical moments of the 1st - 4th orders, characterizing the distributions of the MMI value of linear birefringence and optical activity of samples of histological sections of the brain, liver and kidney, as well as myocardium and lung tissue with different age of damage; determination of the diagnostic efficiency (time interval and accuracy) of establishing the age of damage to human internal organs by digital histological methods of MMI mapping of optical anisotropy of fluorophores in histological sections of the brain, liver and kidney, as well as myocardium and lung tissue.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133424728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wavefront shaping technique makes it possible to overcome limitations for optical imaging in strongly scattering media. Various wavefront shaping algorithms are used in order to find an optimal incident optical field. However, in many cases such experiments appear to be very time consuming and suffer from instability of the scattering media. So, it seems reasonable to use computer simulation in this field. In this paper we use two different approaches to simulate the light focusing through scattering media. The first approach consists in numerical solution of Maxwell equations for the set of spherical particles in random positions, which represent the scattering media. The result of the solution represents the scattering matrix of the media. This matrix is used to simulate propagation of spatially modulated light in the “frozen” stochastic media. As entries of the scattering matrix appear to be random variables with Gaussian distribution, they could be set heuristically for modeling purposes. This makes possible modeling of the wavefront shaping with large number of orthogonal modes of incident light. We considered four focusing techniques: continuous sequential algorithm and focusing using useful properties of Hadamard matrix with a phase-only and binary amplitude modulation (BAM). We represent results on convergence of the algorithms and focal intensity enhancement. We examined spatial variations of intensity enhancement, while scanning the focal point in observation plane. We found, that the intensity enhancement strongly correlates with the speckle from unmodulated illumination, when the BAM is used for wavefront shaping. In the case of phase-only modulation, only weak correlations were observed.
{"title":"Simulation of wavefront shaping through scattering media","authors":"V. Danko, O. Danko, A. Kovalenko","doi":"10.1117/12.2615557","DOIUrl":"https://doi.org/10.1117/12.2615557","url":null,"abstract":"Wavefront shaping technique makes it possible to overcome limitations for optical imaging in strongly scattering media. Various wavefront shaping algorithms are used in order to find an optimal incident optical field. However, in many cases such experiments appear to be very time consuming and suffer from instability of the scattering media. So, it seems reasonable to use computer simulation in this field. In this paper we use two different approaches to simulate the light focusing through scattering media. The first approach consists in numerical solution of Maxwell equations for the set of spherical particles in random positions, which represent the scattering media. The result of the solution represents the scattering matrix of the media. This matrix is used to simulate propagation of spatially modulated light in the “frozen” stochastic media. As entries of the scattering matrix appear to be random variables with Gaussian distribution, they could be set heuristically for modeling purposes. This makes possible modeling of the wavefront shaping with large number of orthogonal modes of incident light. We considered four focusing techniques: continuous sequential algorithm and focusing using useful properties of Hadamard matrix with a phase-only and binary amplitude modulation (BAM). We represent results on convergence of the algorithms and focal intensity enhancement. We examined spatial variations of intensity enhancement, while scanning the focal point in observation plane. We found, that the intensity enhancement strongly correlates with the speckle from unmodulated illumination, when the BAM is used for wavefront shaping. In the case of phase-only modulation, only weak correlations were observed.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132866268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Dubolazov, O. Ushenko, A. Motrich, M. Gavrylyak, I. Soltys, O. Olar, M. Slyotov, M. Matymish
Algorithms for reconstruction of linear and circular birefringence of optically thin anisotropic акрилового скла layers are presented. The technique of Jones-matrix tomography of polycrystalline acrylic glass layers has been experimentally tested. The coordinate distributions of phase anisotropy of acrylic glass samples with varying degrees of mechanical stress are determined and statistically analyzed. Criteria (statistical moments of 3rd and 4th orders) of differential diagnostics of the presence of mechanical stress were determined.
{"title":"Polarization phase reconstruction phase anisotropy in diagnostics of the polycrystalline structure of acrylic glass","authors":"O. Dubolazov, O. Ushenko, A. Motrich, M. Gavrylyak, I. Soltys, O. Olar, M. Slyotov, M. Matymish","doi":"10.1117/12.2617045","DOIUrl":"https://doi.org/10.1117/12.2617045","url":null,"abstract":"Algorithms for reconstruction of linear and circular birefringence of optically thin anisotropic акрилового скла layers are presented. The technique of Jones-matrix tomography of polycrystalline acrylic glass layers has been experimentally tested. The coordinate distributions of phase anisotropy of acrylic glass samples with varying degrees of mechanical stress are determined and statistically analyzed. Criteria (statistical moments of 3rd and 4th orders) of differential diagnostics of the presence of mechanical stress were determined.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116791578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Optical Speckles has many extraordinary applications like subwavelength focusing, aberration-free imaging, etc. which are not possible even with a highly coherent optical field. This makes it necessary to study the fundamental properties of such Optical Speckle fields. In the recent past, the polarization correlation vortex phase was experimentally realized in vector speckle field generated by scattering of Poincare beam. Higher-order correlations have also been studied in such vector speckle fields. Moving further into this direction, we have studied the first-order polarization correlations in the focused vector speckle field. We have generated a vector speckle field by scattering of Poincare beam. Which is then allowed to be focused using a spherical and a cylindrical lens. The focused vector speckle field intensities at different planes around the focal plane were recorded to get polarization correlations at each plane. It was observed that the charge of the input vortex beam before scattering is still present in the polarization correlation of the focused vector speckle field. We have also observed charge inversion of polarization correlation vortex focused through a cylindrical lens. The importance of this study relies in the fact that it provides, with supporting experimental and simulation results, that the polarization correlation obeys the wave equation. It could find application in optical image processing while analyzing any optical data, to find information about the source of the speckles, etc.
{"title":"Charge inversion of polarization correlation vortex","authors":"Himangi J Pandit, Vijay Kumar, R. P. Singh","doi":"10.1117/12.2615150","DOIUrl":"https://doi.org/10.1117/12.2615150","url":null,"abstract":"Optical Speckles has many extraordinary applications like subwavelength focusing, aberration-free imaging, etc. which are not possible even with a highly coherent optical field. This makes it necessary to study the fundamental properties of such Optical Speckle fields. In the recent past, the polarization correlation vortex phase was experimentally realized in vector speckle field generated by scattering of Poincare beam. Higher-order correlations have also been studied in such vector speckle fields. Moving further into this direction, we have studied the first-order polarization correlations in the focused vector speckle field. We have generated a vector speckle field by scattering of Poincare beam. Which is then allowed to be focused using a spherical and a cylindrical lens. The focused vector speckle field intensities at different planes around the focal plane were recorded to get polarization correlations at each plane. It was observed that the charge of the input vortex beam before scattering is still present in the polarization correlation of the focused vector speckle field. We have also observed charge inversion of polarization correlation vortex focused through a cylindrical lens. The importance of this study relies in the fact that it provides, with supporting experimental and simulation results, that the polarization correlation obeys the wave equation. It could find application in optical image processing while analyzing any optical data, to find information about the source of the speckles, etc.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114990630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Peresunko, Ju. Galushko, P. Riabyi, N. Horodynska, S. Yermolenko, D. Burkovets, K. Chala
The aim of this work is to improve the diagnosis of cervical cancer by introducing laser polarimetry and spectro polarization methods of investigation. We have proposed a novel approach for the differentiation of squamous cell carcinoma and cervical adenocarcinoma using laser optics. Obtained by the method of laser polarimetry by Stokes parameter S4 of native smear with adenocarcinoma of the cervix and squamous cell carcinoma, as well as scraping of the mud canal with endometrial adenocarcinoma and flat cell cancer allows to reliably differentiate the norm from cancer in the native smear and adenocarcinoma from the flat cell cancer in the smear-imprint. The method of spectropolarimetry allows reliably accurately distinguishing the normal epithelium of the cervix from cancer of the cervix, and the parameters of linear dichroism during the spectropolarization study, reliably (р=0,001) differentiate between normal, adenocarcinoma and flat cell cancer of the cervix.
{"title":"Spectrophotometry of native cytological smears from the cervix in cervical cancer screening","authors":"O. Peresunko, Ju. Galushko, P. Riabyi, N. Horodynska, S. Yermolenko, D. Burkovets, K. Chala","doi":"10.1117/12.2615512","DOIUrl":"https://doi.org/10.1117/12.2615512","url":null,"abstract":"The aim of this work is to improve the diagnosis of cervical cancer by introducing laser polarimetry and spectro polarization methods of investigation. We have proposed a novel approach for the differentiation of squamous cell carcinoma and cervical adenocarcinoma using laser optics. Obtained by the method of laser polarimetry by Stokes parameter S4 of native smear with adenocarcinoma of the cervix and squamous cell carcinoma, as well as scraping of the mud canal with endometrial adenocarcinoma and flat cell cancer allows to reliably differentiate the norm from cancer in the native smear and adenocarcinoma from the flat cell cancer in the smear-imprint. The method of spectropolarimetry allows reliably accurately distinguishing the normal epithelium of the cervix from cancer of the cervix, and the parameters of linear dichroism during the spectropolarization study, reliably (р=0,001) differentiate between normal, adenocarcinoma and flat cell cancer of the cervix.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128337464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the paper described is a method of transmission of phase information by an optical signal which propagates through an optically inhomogeneous medium. Phase information is represented as an interference pattern of two states of an object that is deformed between state fixations. It is proposed to pass signal and reference beams through an optically inhomogeneous path in the same direction when recording holograms of states. In this implementation, an optical signal which carries information in the form of a system of interfering beams (holograms) is subject to minimal interference. And these holograms contain undistorted information about the wavefronts of the beams. Further mathematical processing (image addition and noise separation) allows to obtain the desired information about the deformation of the object. Optical inhomogeneities in the work are represented in thin diffuser approximation (Random Phase Diffuser), where RPD is described as an ensemble of point retranslates. Each of these retranslates at any point of the cross section of the beam transmit the amplitude of the field and at the same time adds a random stationary change to the phase. This model of optical inhomogeneities is of practical interest, because such a representation corresponds to the description of a single-mode regular fiber bundle, which can be used in real experiments to obtain information about the state of the object from hard-to-reach places.
{"title":"Transmission of phase informative optical signal through the optically inhomogeneous medium","authors":"L. Derzhypolska, A. Derzhypolskyi, O. Gnatovskyi","doi":"10.1117/12.2615216","DOIUrl":"https://doi.org/10.1117/12.2615216","url":null,"abstract":"In the paper described is a method of transmission of phase information by an optical signal which propagates through an optically inhomogeneous medium. Phase information is represented as an interference pattern of two states of an object that is deformed between state fixations. It is proposed to pass signal and reference beams through an optically inhomogeneous path in the same direction when recording holograms of states. In this implementation, an optical signal which carries information in the form of a system of interfering beams (holograms) is subject to minimal interference. And these holograms contain undistorted information about the wavefronts of the beams. Further mathematical processing (image addition and noise separation) allows to obtain the desired information about the deformation of the object. Optical inhomogeneities in the work are represented in thin diffuser approximation (Random Phase Diffuser), where RPD is described as an ensemble of point retranslates. Each of these retranslates at any point of the cross section of the beam transmit the amplitude of the field and at the same time adds a random stationary change to the phase. This model of optical inhomogeneities is of practical interest, because such a representation corresponds to the description of a single-mode regular fiber bundle, which can be used in real experiments to obtain information about the state of the object from hard-to-reach places.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"12126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128721875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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