Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019482
Paulius Sakalys, Loreta Savulioniene
The study combines two fields of science - robotics and crop production. The aim of the study is to determine the dependence of plant growth dynamics on the parameters of a robotic system when a plant will grow in a water solution with a limited light spectrum, paying special attention to the amount of plant illumination at different light wavelengths. The results of the study are used to directly control plant-grown biomass by adaptively changing the illumination flow of the robot system.
{"title":"Research of Dependence Between Plant Growing Dynamics and Parameters of Robotic System","authors":"Paulius Sakalys, Loreta Savulioniene","doi":"10.1109/CAOL46282.2019.9019482","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019482","url":null,"abstract":"The study combines two fields of science - robotics and crop production. The aim of the study is to determine the dependence of plant growth dynamics on the parameters of a robotic system when a plant will grow in a water solution with a limited light spectrum, paying special attention to the amount of plant illumination at different light wavelengths. The results of the study are used to directly control plant-grown biomass by adaptively changing the illumination flow of the robot system.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122490242","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019510
Kostiantyn Muntean, E. Timofeev
The method of electrical calibration of an isoperibolic calorimeter by measuring transient time constants is considered. The expressions for the replacement equivalence rate and its uncertainties are calculated. The asymmetry of the processes of heating and cooling of the calorimeter as well as the nonlinearity of its thermophysical characteristics have been studied experimentally.
{"title":"Calibration of Isoperibolic Calorimeter by Using Transient Time Constants","authors":"Kostiantyn Muntean, E. Timofeev","doi":"10.1109/CAOL46282.2019.9019510","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019510","url":null,"abstract":"The method of electrical calibration of an isoperibolic calorimeter by measuring transient time constants is considered. The expressions for the replacement equivalence rate and its uncertainties are calculated. The asymmetry of the processes of heating and cooling of the calorimeter as well as the nonlinearity of its thermophysical characteristics have been studied experimentally.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115535488","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019428
F. Sizov, O. Golenkov, I. Lysiuk, A. Shevchik-Shekera
The THz and IR technologies gave the possibility to get information in regions of electromagnetic spectra, which are inaccessible to human visual perception. Recent progress in applying THz and IR technologies to different domains of human activity was possible due to the development of high performance THz detectors (e.g., in astronomy-cosmic microwave background and interstellar matter formation, high resolution molecular spectroscopy; detectors and sources for active imaging, high speed and broadband communications, biomedical applications, surveillance, identification of hazardous chemicals, etc.). However, with the complexity of high sensitive uncooled or slightly cooled detectors and complexity of handheld or, at least portable, THz sources, this validates yet the difficulties of THz radiations technologies to ensure market penetration with THz systems for cost-effective civil applications. For short-range THz communication technique in environmental Earth conditions, one can notice the development of active silicon photonics integrated technologies.
{"title":"THz and IR detectors in applications : (Invited)","authors":"F. Sizov, O. Golenkov, I. Lysiuk, A. Shevchik-Shekera","doi":"10.1109/CAOL46282.2019.9019428","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019428","url":null,"abstract":"The THz and IR technologies gave the possibility to get information in regions of electromagnetic spectra, which are inaccessible to human visual perception. Recent progress in applying THz and IR technologies to different domains of human activity was possible due to the development of high performance THz detectors (e.g., in astronomy-cosmic microwave background and interstellar matter formation, high resolution molecular spectroscopy; detectors and sources for active imaging, high speed and broadband communications, biomedical applications, surveillance, identification of hazardous chemicals, etc.). However, with the complexity of high sensitive uncooled or slightly cooled detectors and complexity of handheld or, at least portable, THz sources, this validates yet the difficulties of THz radiations technologies to ensure market penetration with THz systems for cost-effective civil applications. For short-range THz communication technique in environmental Earth conditions, one can notice the development of active silicon photonics integrated technologies.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114163944","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019556
V. Yu, T. Kryvyy, I. Skab, R. Vlokh
We demonstrate that there are promising possibilities for generating singular beams that bear optical vortices with the aid of parametric optical effects. These effects can arise in single crystals subjected to inhomogeneous mechanical stresses and electric fields. Another technique is acousto-optic or acousto-gyration interactions in single crystals. We reveal the resources for controlling the efficiency of spin-to-orbital angular momentum conversion by the external fields and controlling spatially the vortex beams with acousto-optic interactions.
{"title":"Control of Optical Vortices via Parametric Optical Effects","authors":"V. Yu, T. Kryvyy, I. Skab, R. Vlokh","doi":"10.1109/CAOL46282.2019.9019556","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019556","url":null,"abstract":"We demonstrate that there are promising possibilities for generating singular beams that bear optical vortices with the aid of parametric optical effects. These effects can arise in single crystals subjected to inhomogeneous mechanical stresses and electric fields. Another technique is acousto-optic or acousto-gyration interactions in single crystals. We reveal the resources for controlling the efficiency of spin-to-orbital angular momentum conversion by the external fields and controlling spatially the vortex beams with acousto-optic interactions.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130837050","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019466
I. Hrihorenko, S. Hrihorenko, E. Tverytnykova, Maryna Opryshkina
The paper analyzes the possibility of improving the metrological accuracy of a device for control a laser system for measuring the geometric dimensions and surface quality of parts, due to the use of an artificial neural network. The possibility of taking into account the internal and external factors affecting the measurement result, which can be the basis for the formation of the initial data sets used by the computer model of the neural network on a multilayer perceptron has been proved.
{"title":"Improving the accuracy of the laser control system","authors":"I. Hrihorenko, S. Hrihorenko, E. Tverytnykova, Maryna Opryshkina","doi":"10.1109/CAOL46282.2019.9019466","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019466","url":null,"abstract":"The paper analyzes the possibility of improving the metrological accuracy of a device for control a laser system for measuring the geometric dimensions and surface quality of parts, due to the use of an artificial neural network. The possibility of taking into account the internal and external factors affecting the measurement result, which can be the basis for the formation of the initial data sets used by the computer model of the neural network on a multilayer perceptron has been proved.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130988094","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019497
A. Kamalieva, N. Toropov, T. Vartanyan
In this work we demonstrated the operation of the spasers array of a novel configuration: a monolayer of silver nanoparticles supported on a transparent substrate acted as resonators, while the thin film of coumarin dye molecules coated above them acted as an amplifying medium. To correctly interpret the results, the similar thin coumarin film without nanoparticles was prepared and studied as well. While in the thin film of coumarin dye molecules without nanoparticles the intensity of a broad fluorescence band at pump energy above 2.38 mJ practically stops growing and goes into saturation, in the hybrid structure an additional narrow and completely linearly polarized emission band pops up over a much broader background band and starts to grow faster than at lower pump energies. Thus, the obtained experimental data corroborate the existence of spasing in a novel thin solid film structure. Another advantage of this work is that spasing was observed at room temperature.
{"title":"Monolayer of Plasmonic Nanolaser: a Study of Spasing Regime and Polarization Characteristics","authors":"A. Kamalieva, N. Toropov, T. Vartanyan","doi":"10.1109/CAOL46282.2019.9019497","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019497","url":null,"abstract":"In this work we demonstrated the operation of the spasers array of a novel configuration: a monolayer of silver nanoparticles supported on a transparent substrate acted as resonators, while the thin film of coumarin dye molecules coated above them acted as an amplifying medium. To correctly interpret the results, the similar thin coumarin film without nanoparticles was prepared and studied as well. While in the thin film of coumarin dye molecules without nanoparticles the intensity of a broad fluorescence band at pump energy above 2.38 mJ practically stops growing and goes into saturation, in the hybrid structure an additional narrow and completely linearly polarized emission band pops up over a much broader background band and starts to grow faster than at lower pump energies. Thus, the obtained experimental data corroborate the existence of spasing in a novel thin solid film structure. Another advantage of this work is that spasing was observed at room temperature.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131706683","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019448
P. Romanov, V. Toporovsky, A. Kudryashov, V. Samarkin, J. Sheldakova, A. Rukosuev
To compensate for the wavefront distortions in high-power laser setups we developed stacked-actuator deformable mirror with aperture of 120 mm and 121 control actuators and bimorph deformable mirror with size of 410x468 mm. Design of the stacked-actuator mirror provides substitution of broken piezoactuators. Also, we can provide thermostabilization of the mirror surface through actuator body. Bimorph mirror has high surface amplitude deformation (about 20 um) and good flatness of the initial surface of the mirror (0.03 um RMS). Also, there is a possibility of preliminary adjustment by the piezostacks, which situated on the edge of the mirror.
为了补偿高功率激光装置中的波前畸变，我们开发了孔径为120 mm和121个控制致动器的堆叠致动器变形镜和尺寸为410x468 mm的双晶片变形镜。叠层式致动器反射镜的设计为损坏的压电致动器提供了替代。此外，我们还可以通过执行机构提供镜面热稳定。双晶圆反射镜具有高的表面振幅变形(约20 um)和良好的镜面平整度(0.03 um RMS)。此外，还可以通过位于镜子边缘的压电堆进行初步调整。
{"title":"Wide-aperture deformable mirrors for wavefront distortions compensation in high-power laser complexes","authors":"P. Romanov, V. Toporovsky, A. Kudryashov, V. Samarkin, J. Sheldakova, A. Rukosuev","doi":"10.1109/CAOL46282.2019.9019448","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019448","url":null,"abstract":"To compensate for the wavefront distortions in high-power laser setups we developed stacked-actuator deformable mirror with aperture of 120 mm and 121 control actuators and bimorph deformable mirror with size of 410x468 mm. Design of the stacked-actuator mirror provides substitution of broken piezoactuators. Also, we can provide thermostabilization of the mirror surface through actuator body. Bimorph mirror has high surface amplitude deformation (about 20 um) and good flatness of the initial surface of the mirror (0.03 um RMS). Also, there is a possibility of preliminary adjustment by the piezostacks, which situated on the edge of the mirror.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116058561","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019547
N. Konovalova, N. Khramenko
Endogenous uveitis is an inflammatory disease of the uvea, making up to 30% in the ophthalmology overall structure according to various authors. Uveitis is among current socially important issues in ophthalmology due to significant incidence rates mainly in people of young and working age; visual impairment and blindness occur in 17.7%-19.2-35% of patients. Fifty-four patients (54 eyes) with anterior uveitis were followed up. All patients were performed biomicroscopy, ophthalmoscopy, intraocular pressure measurements, perimetry, and ophthalmic rheography using a parameter of pulse volume, the Rheographic Quotient (RQ) (‰) (ReoCom, Ukraine). Optical coherent tomography (OCT) visualized structural changes not only in the sensory retina but in the choroid, which makes it possible to assess the inflammation process in the eye and to early diagnose and to prevent potential complications. Fluorescein angiography (FAG) was performed in order to assess the pigment epithelium, sensory epithelium, and vessels as well as to reveal drusen and the accumulation of lipofuscin in the retina. OCT findings give the evidence of the presence of macular edema if the retina thickness is increased in the fovea (>240 µm). This is evidenced by the FAG findings and revealed difference in the rheographic quotient value of more than 64% in 21 patients, which made it possible to predict the risk of a dry form of macular dystrophy in these patients. Timely prescription of Indocollyre® electrophoresis and instillations advanced macular edema resolution, which contributed to significant improvement of visual acuity in the iridocyclitis patients, as much as twice, in both groups. The mean treatment course in an acute process was 10±1.8 days. It is reasonable to use Indocollyre® electrophoresis and instillations to prevent such anterior uveitis complications as macular edema and secondary macular degeneration.
{"title":"To the Treatment of Anterior Uveitis","authors":"N. Konovalova, N. Khramenko","doi":"10.1109/CAOL46282.2019.9019547","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019547","url":null,"abstract":"Endogenous uveitis is an inflammatory disease of the uvea, making up to 30% in the ophthalmology overall structure according to various authors. Uveitis is among current socially important issues in ophthalmology due to significant incidence rates mainly in people of young and working age; visual impairment and blindness occur in 17.7%-19.2-35% of patients. Fifty-four patients (54 eyes) with anterior uveitis were followed up. All patients were performed biomicroscopy, ophthalmoscopy, intraocular pressure measurements, perimetry, and ophthalmic rheography using a parameter of pulse volume, the Rheographic Quotient (RQ) (‰) (ReoCom, Ukraine). Optical coherent tomography (OCT) visualized structural changes not only in the sensory retina but in the choroid, which makes it possible to assess the inflammation process in the eye and to early diagnose and to prevent potential complications. Fluorescein angiography (FAG) was performed in order to assess the pigment epithelium, sensory epithelium, and vessels as well as to reveal drusen and the accumulation of lipofuscin in the retina. OCT findings give the evidence of the presence of macular edema if the retina thickness is increased in the fovea (>240 µm). This is evidenced by the FAG findings and revealed difference in the rheographic quotient value of more than 64% in 21 patients, which made it possible to predict the risk of a dry form of macular dystrophy in these patients. Timely prescription of Indocollyre® electrophoresis and instillations advanced macular edema resolution, which contributed to significant improvement of visual acuity in the iridocyclitis patients, as much as twice, in both groups. The mean treatment course in an acute process was 10±1.8 days. It is reasonable to use Indocollyre® electrophoresis and instillations to prevent such anterior uveitis complications as macular edema and secondary macular degeneration.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123004222","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019417
A. Belova, V. Lymar', Ye. D. Makovetskyi, M. Pogrebnyak, A. Rudenko
Features of accumulate-and-fire system are demonstrated experimentally at excitation of the laser-induced thermal lens oscillations near a fluid interface. The interface ability to retard convective flows is treated as a possible reason for the accumulate-and-fire behavior. Some experimental data become more understandable with this approach. The threshold for the convective flows switching near the fluid interface has another origin in comparison with well-known classic convective thresholds. Association of this phenomenon with the Rayleigh–Taylor instability is discussed.
{"title":"Threshold Behavior of Convective Flows at Thermal Lens Oscillations","authors":"A. Belova, V. Lymar', Ye. D. Makovetskyi, M. Pogrebnyak, A. Rudenko","doi":"10.1109/CAOL46282.2019.9019417","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019417","url":null,"abstract":"Features of accumulate-and-fire system are demonstrated experimentally at excitation of the laser-induced thermal lens oscillations near a fluid interface. The interface ability to retard convective flows is treated as a possible reason for the accumulate-and-fire behavior. Some experimental data become more understandable with this approach. The threshold for the convective flows switching near the fluid interface has another origin in comparison with well-known classic convective thresholds. Association of this phenomenon with the Rayleigh–Taylor instability is discussed.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114941032","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}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019483
I. Zakharov, M. Serhiienko
In this article there is suggested a method, which determines both a time constant and a gain-frequency characteristic damp constant for a measuring device, which is simulated by oscillating type dynamic element. The described method is based on a method of least squares, which increases an identification accuracy because of obtaining more information about a measuring device performance during a measurement process. The standard uncertainties of both a time constant and a damp constant are analyzed. The recommendations for measuring process, which was mentioned above, optimization are given.
{"title":"Adaptation of the least squares method for determination of oscillating type measuring devices parameters with using gain-frequency characteristic","authors":"I. Zakharov, M. Serhiienko","doi":"10.1109/CAOL46282.2019.9019483","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019483","url":null,"abstract":"In this article there is suggested a method, which determines both a time constant and a gain-frequency characteristic damp constant for a measuring device, which is simulated by oscillating type dynamic element. The described method is based on a method of least squares, which increases an identification accuracy because of obtaining more information about a measuring device performance during a measurement process. The standard uncertainties of both a time constant and a damp constant are analyzed. The recommendations for measuring process, which was mentioned above, optimization are given.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122608465","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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