Wavefront sensing techniques with local slopes measurement (the Shack-Hartmann sensor or the similar one based on the Talbot effect) involve a reference wave, which is supposed to be of well-known shape (plane or spherical). But sometimes the reference wave can’t be formed easily, for example, in X-ray measurements. A reference-free wavefront reconstruction based on the Talbot sensor is discussed in the paper. The spot images are formed in several sequential planes due to the Talbot effect. It allows reconstruct the wave front from two object images in nearby planes without a reference. The self-reproduction phenomenon takes place in a wide wavelength range, so field of use of the Talbot sensor can be significantly expanded. Experimental results of the reference-free reconstruction of a 2nd order aberration of optical wave have been compared with the classical approaches for the Shack-Hartmann and Talbot sensors.
{"title":"Reference-free wave-front sensor based on the Talbot effect","authors":"D. G. Brazhnikov, M. M. Kotov, A. Kovalenko","doi":"10.1117/12.2553948","DOIUrl":"https://doi.org/10.1117/12.2553948","url":null,"abstract":"Wavefront sensing techniques with local slopes measurement (the Shack-Hartmann sensor or the similar one based on the Talbot effect) involve a reference wave, which is supposed to be of well-known shape (plane or spherical). But sometimes the reference wave can’t be formed easily, for example, in X-ray measurements. A reference-free wavefront reconstruction based on the Talbot sensor is discussed in the paper. The spot images are formed in several sequential planes due to the Talbot effect. It allows reconstruct the wave front from two object images in nearby planes without a reference. The self-reproduction phenomenon takes place in a wide wavelength range, so field of use of the Talbot sensor can be significantly expanded. Experimental results of the reference-free reconstruction of a 2nd order aberration of optical wave have been compared with the classical approaches for the Shack-Hartmann and Talbot sensors.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131670276","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 rotating point spread function (PSF) is an effective tool with a various applications in the modern optics. In the optical system with the established rotating PSF, a point-like object is imaged as a rotationally asymmetrical diffractive spot and the longitudinal object translation is transformed to the image rotation. The rotating PSF can be implemented to a standard imaging system by a specially designed mask composed of annular apertures with a spiral phase modulation and the resulting rotation effect is achieved by a superposition of generated optical vortices. Obviously, a numerical algorithm enabling evaluation of the PSF angular orientation plays the key role in the digital processing of the detected rotating PSF. The aim of this work is an analysis of selected numerical methods for the rotating point spread function evaluation.
{"title":"Numerical methods for analysis of the rotating point spread function","authors":"Barbora Zadnikova, M. Baránek","doi":"10.1117/12.2557054","DOIUrl":"https://doi.org/10.1117/12.2557054","url":null,"abstract":"The rotating point spread function (PSF) is an effective tool with a various applications in the modern optics. In the optical system with the established rotating PSF, a point-like object is imaged as a rotationally asymmetrical diffractive spot and the longitudinal object translation is transformed to the image rotation. The rotating PSF can be implemented to a standard imaging system by a specially designed mask composed of annular apertures with a spiral phase modulation and the resulting rotation effect is achieved by a superposition of generated optical vortices. Obviously, a numerical algorithm enabling evaluation of the PSF angular orientation plays the key role in the digital processing of the detected rotating PSF. The aim of this work is an analysis of selected numerical methods for the rotating point spread function evaluation.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113966231","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 paper describes the design of a biologically inspired compound eye. It contains numerous optical channels like facets in a natural compound eye. Each facet has an optical system, several photodetectors with pre-amplifiers and a microcontroller with a multi-channel analog-to-digital converter. The signals coming from the photodetectors in each channel are amplified, converted into a digital form and processed by a microcontroller. All microcontrollers are attached to a microcontroller network. These microcontrollers can be reprogrammed to perform various image processing operations including spatial filtration, temporal filtration, correlation calculation, neural network simulation and others. It makes possible investigation and performance evaluation of the compound eye when all its facets perform parallel image processing and image analysis. The working prototype of this compound eye has demonstrated ability to measure distribution of speed and direction of optical flow thought its field of view. The possible improvements and possible applications of this design are also discussed.
{"title":"Biologically inspired compound eye","authors":"V. Borovytsky, V. Antonenko","doi":"10.1117/12.2553678","DOIUrl":"https://doi.org/10.1117/12.2553678","url":null,"abstract":"The paper describes the design of a biologically inspired compound eye. It contains numerous optical channels like facets in a natural compound eye. Each facet has an optical system, several photodetectors with pre-amplifiers and a microcontroller with a multi-channel analog-to-digital converter. The signals coming from the photodetectors in each channel are amplified, converted into a digital form and processed by a microcontroller. All microcontrollers are attached to a microcontroller network. These microcontrollers can be reprogrammed to perform various image processing operations including spatial filtration, temporal filtration, correlation calculation, neural network simulation and others. It makes possible investigation and performance evaluation of the compound eye when all its facets perform parallel image processing and image analysis. The working prototype of this compound eye has demonstrated ability to measure distribution of speed and direction of optical flow thought its field of view. The possible improvements and possible applications of this design are also discussed.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134393686","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, Tatjana V. Kruk, Kateryna M. Chala, S. Yermolenko, Denis G. Gostyuk, I. Gruia
This work is devoted to the substantiation and selection of patients with breast cancer (BC) for the purpose of conducting expensive molecular genetic studies on genotyping. As diagnostic methods have been used ultraviolet spectrometry samples of blood plasma in the liquid state, infrared spectroscopy middle range (2,5 - 25 microns) dry residue of plasma polarization and laser diagnostic technique of thin histological sections of biological tissues. Obtained results showed that the use of spectrophotometry in the range of 1000-3000 cm-1 allowed to establish quantitative parameters of the plasma absorption rate of blood of patients in the third group in different ranges, which would allow in the future to conduct an express analysis of the patient's condition (procedure screening) for further molecular-genetic typing on BRCA I and II.
{"title":"Spectropolarimetric comparison of molecular-genetic study of BRCA1 gene mutation types in patients with breast cancer and their relatives","authors":"O. Peresunko, Tatjana V. Kruk, Kateryna M. Chala, S. Yermolenko, Denis G. Gostyuk, I. Gruia","doi":"10.1117/12.2553909","DOIUrl":"https://doi.org/10.1117/12.2553909","url":null,"abstract":"This work is devoted to the substantiation and selection of patients with breast cancer (BC) for the purpose of conducting expensive molecular genetic studies on genotyping. As diagnostic methods have been used ultraviolet spectrometry samples of blood plasma in the liquid state, infrared spectroscopy middle range (2,5 - 25 microns) dry residue of plasma polarization and laser diagnostic technique of thin histological sections of biological tissues. Obtained results showed that the use of spectrophotometry in the range of 1000-3000 cm-1 allowed to establish quantitative parameters of the plasma absorption rate of blood of patients in the third group in different ranges, which would allow in the future to conduct an express analysis of the patient's condition (procedure screening) for further molecular-genetic typing on BRCA I and II.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"11369 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130352866","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 interaction of non-absorbent materials (PVC, PS, films etc.) with the testing inks was researched. Measurements of the imprint's optical characteristics were taken depending on the inks and substrate and its morphology. The research of mentioned parameters is required while creating absolutely new materials to be a printing surface and testing system "printing material-ink". These measurements allow determining the possibility of current existing materials use in a particular technological process of printing. The relationship between printed surface wetting and its technical-printing parameters is determined. The interaction of the ―printed surface - ink‖ system is predicted. The component pairs mutual influence onto the printing process is determined. The possibility to ensure the normalized color difference and optical characteristics of imprints was taken into account.
{"title":"Optical characteristics of the imprints","authors":"K. Zolotukhina, O. Velychko","doi":"10.1117/12.2551596","DOIUrl":"https://doi.org/10.1117/12.2551596","url":null,"abstract":"The interaction of non-absorbent materials (PVC, PS, films etc.) with the testing inks was researched. Measurements of the imprint's optical characteristics were taken depending on the inks and substrate and its morphology. The research of mentioned parameters is required while creating absolutely new materials to be a printing surface and testing system \"printing material-ink\". These measurements allow determining the possibility of current existing materials use in a particular technological process of printing. The relationship between printed surface wetting and its technical-printing parameters is determined. The interaction of the ―printed surface - ink‖ system is predicted. The component pairs mutual influence onto the printing process is determined. The possibility to ensure the normalized color difference and optical characteristics of imprints was taken into account.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130264707","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. Bekshaev, Aleksandr Akhmerov, Vijay Kumar, R. P. Singh, S. Patil
The slit diffraction of circular OV beams is studied both theoretically and by experiment, with explicit involvement of the incident beam convergence or divergence (finite value of the wavefront curvature radius). Based on the example of Laguerre-Gaussian mode with zero radial index and non-zero azimuthal index m we confirm that the far-field diffraction pattern contains exactly |m| bright lobes elongated orthogonally to the slit (which was reported previously) and show that the far-field profile possesses an asymmetry with respect to the slit axis depending on the wavefront curvature (which is a new result). Being combined, these features enable simple and efficient means for the simultaneous express diagnostics of the magnitude and the sign of the OV topological charge, which can be useful in many OV applications, including the OV-assisted metrology and information processing.
{"title":"Far-field slit diffraction and express diagnostics of optical vortices","authors":"A. Bekshaev, Aleksandr Akhmerov, Vijay Kumar, R. P. Singh, S. Patil","doi":"10.1117/12.2554919","DOIUrl":"https://doi.org/10.1117/12.2554919","url":null,"abstract":"The slit diffraction of circular OV beams is studied both theoretically and by experiment, with explicit involvement of the incident beam convergence or divergence (finite value of the wavefront curvature radius). Based on the example of Laguerre-Gaussian mode with zero radial index and non-zero azimuthal index m we confirm that the far-field diffraction pattern contains exactly |m| bright lobes elongated orthogonally to the slit (which was reported previously) and show that the far-field profile possesses an asymmetry with respect to the slit axis depending on the wavefront curvature (which is a new result). Being combined, these features enable simple and efficient means for the simultaneous express diagnostics of the magnitude and the sign of the OV topological charge, which can be useful in many OV applications, including the OV-assisted metrology and information processing.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129234343","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 temperature induced transition in one-dimensional bistable molecular magnetic systems with degenerate states is discussed. This phenomenon derives from the existence of two stable spin configurations in transition metallic ion, separated by an energy gap, that determines a certain spin state. A new microscopic model is proposed in order to account for the variation of molecular size in observed magnetic states. The behavior of 1D bistable molecular chain considering both structural and magnetic properties have been studied in framework of simple conception in which the molecules are strongly fixed on chain’s sites and are connected by springs.
{"title":"Temperature induced transition in one-dimensional molecular magnets","authors":"Iurii Gudyma, A. Maksymov","doi":"10.1117/12.2553914","DOIUrl":"https://doi.org/10.1117/12.2553914","url":null,"abstract":"The temperature induced transition in one-dimensional bistable molecular magnetic systems with degenerate states is discussed. This phenomenon derives from the existence of two stable spin configurations in transition metallic ion, separated by an energy gap, that determines a certain spin state. A new microscopic model is proposed in order to account for the variation of molecular size in observed magnetic states. The behavior of 1D bistable molecular chain considering both structural and magnetic properties have been studied in framework of simple conception in which the molecules are strongly fixed on chain’s sites and are connected by springs.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128226628","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}
Magnetic properties of AA and AB stacked bilayers were investigated by means of Monte Carlo technique based on Metropolis algorithm within Ising-like model. A higher values of blocking temperature for AB stacked bilayer was obtained, which indicates that AB nano-graphene bilayer is more energetically beneficial compared to AA stacked. Transition between ferromagnetic and paramagnetic phases of the considered types of bilayers, was established. This makes such nanosystems promising in sensor applications (magnetic field sensors) and spintronics. Hysteresis near absolute zero temperature for ferromagnetic case was obtained, the existence of which strongly depends on the values of exchange interaction and temperature. Obtained results of computer simulation agree with theoretical and experimental ones of other authors.
{"title":"Monte Carlo simulation of magnetic properties of AA and AB stacked nano-graphene bilayer within Ising-like model","authors":"O. Angelsky, V. Ivashko, P. Maksimyak","doi":"10.1117/12.2552363","DOIUrl":"https://doi.org/10.1117/12.2552363","url":null,"abstract":"Magnetic properties of AA and AB stacked bilayers were investigated by means of Monte Carlo technique based on Metropolis algorithm within Ising-like model. A higher values of blocking temperature for AB stacked bilayer was obtained, which indicates that AB nano-graphene bilayer is more energetically beneficial compared to AA stacked. Transition between ferromagnetic and paramagnetic phases of the considered types of bilayers, was established. This makes such nanosystems promising in sensor applications (magnetic field sensors) and spintronics. Hysteresis near absolute zero temperature for ferromagnetic case was obtained, the existence of which strongly depends on the values of exchange interaction and temperature. Obtained results of computer simulation agree with theoretical and experimental ones of other authors.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123747653","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}
I. Fodchuk, A. Kuzmin, I. Hutsuliak, M. Solodkyi, V. Dovganyuk, O. Maslyanchuk, Y. Roman, R. Zaplitnyy, O. Gudymenko, V. Kladko, V. Mоlоdkin, V. Lizunov
The degree of structural perfection of CdTe:Cl single crystals was estimated by methods of high-resolution Xray diffractometry. Two possible systems of dislocations that consists of two sets of complete 60-degree dislocations and Frank partial dislocations were investigated with the use of Krivoglaz kinematic theory and Monte Carlo method. The density of dislocations that provides correspondence between experimental and simulated reciprocal space maps is determined.
{"title":"Defect structure of high-resistivity CdTe:Cl crystals according to the data of high-resolution x-ray diffractometry","authors":"I. Fodchuk, A. Kuzmin, I. Hutsuliak, M. Solodkyi, V. Dovganyuk, O. Maslyanchuk, Y. Roman, R. Zaplitnyy, O. Gudymenko, V. Kladko, V. Mоlоdkin, V. Lizunov","doi":"10.1117/12.2553970","DOIUrl":"https://doi.org/10.1117/12.2553970","url":null,"abstract":"The degree of structural perfection of CdTe:Cl single crystals was estimated by methods of high-resolution Xray diffractometry. Two possible systems of dislocations that consists of two sets of complete 60-degree dislocations and Frank partial dislocations were investigated with the use of Krivoglaz kinematic theory and Monte Carlo method. The density of dislocations that provides correspondence between experimental and simulated reciprocal space maps is determined.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132196282","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 correlation technique of cement particle size distribution determining is described. It is based on transverse coherent function measuring using a polarization transverse shearing interferometer. It is shown that set of particles with random form can be substituted with set of spherical particles. This result was obtained by simulation of different particles sets with different forms and orientations.
{"title":"Optical sizing of cement particles: shape influence","authors":"M. Gorsky, P. Maksymyak","doi":"10.1117/12.2553976","DOIUrl":"https://doi.org/10.1117/12.2553976","url":null,"abstract":"Optical correlation technique of cement particle size distribution determining is described. It is based on transverse coherent function measuring using a polarization transverse shearing interferometer. It is shown that set of particles with random form can be substituted with set of spherical particles. This result was obtained by simulation of different particles sets with different forms and orientations.","PeriodicalId":250235,"journal":{"name":"International Conference on Correlation Optics","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134497040","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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