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Journal articles on the topic 'Optical-mechanical analogy'

Author: Grafiati

Published: 18 May 2024

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1

Valishin, N. T., A. I. Volkov, Z. F. Bildanova, and V. A. Selivanova. "To continue the optical-mechanical analogy." Journal of Physics: Conference Series 1679 (November 2020): 022016. http://dx.doi.org/10.1088/1742-6596/1679/2/022016.

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2

Aliev, Ismail N., Igor V. Fomin, and Zarifa A. Samedova. "OPTICAL-MECHANICAL ANALOGY OF THE GRAVITATIONAL FIELD." Bulletin of the Moscow State Regional University (Physics and Mathematics), no. 4 (2017): 55–61. http://dx.doi.org/10.18384/2310-7251-2017-4-55-61.

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3

Abdil’din, M. M., M. E. Abishev, N. A. Beissen, and A. S. Taukenova. "On the optical-mechanical analogy in general relativity." Gravitation and Cosmology 17, no. 2 (2011): 143–46. http://dx.doi.org/10.1134/s0202289311020034.

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4

Aslanyan, A. L., L. S. Aslanyan, and S. K. Nazaryan. "Optical-mechanical analogy in problems of polarization optics." Journal of Contemporary Physics (Armenian Academy of Sciences) 47, no. 1 (2012): 23–28. http://dx.doi.org/10.3103/s1068337212010057.

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5

Nandi, Kamal K., and Anwarul Islam. "On the optical–mechanical analogy in general relativity." American Journal of Physics 63, no. 3 (1995): 251–56. http://dx.doi.org/10.1119/1.17934.

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6

Khan, Sameen Ahmed. "Hamilton's optical–mechanical analogy in the wavelength-dependent regime." Optik 130 (February 2017): 714–22. http://dx.doi.org/10.1016/j.ijleo.2016.10.112.

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7

Delphenich, D. H. "The optical-mechanical analogy for wave mechanics: a new hope." Journal of Physics: Conference Series 2197, no. 1 (2022): 012005. http://dx.doi.org/10.1088/1742-6596/2197/1/012005.

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Abstract The continuum-mechanical formulation of wave mechanics suggests that there is an intermediate stage of theoretical generality between wave mechanics and point mechanics, namely, continuum mechanics. When that argument is applied to the corresponding transition from wave optics to geometrical optics, the corresponding intermediate stage is essentially the geometrical theory of diffraction, i.e., the theory of diffracted geodesics.

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8

Alsing, Paul M. "The optical-mechanical analogy for stationary metrics in general relativity." American Journal of Physics 66, no. 9 (1998): 779–90. http://dx.doi.org/10.1119/1.18957.

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9

Becchetti, F. D. "The nuclear optical model and its optical-scattering analog: Mie scattering." American Journal of Physics 91, no. 8 (2023): 637–43. http://dx.doi.org/10.1119/5.0152813.

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The methods devised by Gustav Mie in 1908 to explain the scattering of electromagnetic waves have a close analogy with quantum-mechanical models developed many years later to describe nuclear scattering. In particular, these models use either a complex index of refraction or a complex nuclear scattering potential to account for attenuation caused by non-elastic scattering. We briefly outline the historical development of these models and give examples illustrating the close analogy between them, their parameters, and the resulting scattering. In both models, the ratio of the incident wavelengt

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10

Opatrny, T. "Mean value and uncertainty of optical phase-a simple mechanical analogy." Journal of Physics A: Mathematical and General 27, no. 21 (1994): 7201–8. http://dx.doi.org/10.1088/0305-4470/27/21/034.

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11

SMITH, RUSSELL. "Optical reflection and mechanical rebound: the shift from analogy to axiomatization in the seventeenth century. Part 1." British Journal for the History of Science 41, no. 1 (2007): 1–18. http://dx.doi.org/10.1017/s0007087407000362.

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AbstractThis paper aims to show that the seventeenth-century conception of mechanics as the science of particles in motion founded on universal laws of motion owes much to the employment of a new conceptual resource – the physics of motion developed within optics. The optical analysis of reflection was dynamically interpreted through the mechanical analogy of rebound. The kinematical and dynamical principles so employed became directly applicable to natural phenomena after the eventual transformation of light's ontological status from that of an Aristotelian ‘quality’ to a corpuscular phenomen

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12

BAUM, E. "ANALYSIS OF OPTICAL WAVEGUIDES USING AN ANALOGY TO A MECHANICAL VIBRATION PROBLEM." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 8, no. 3 (1989): 123–26. http://dx.doi.org/10.1108/eb010054.

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13

Bogatskaya, A. V., N. V. Klenov, M. V. Tereshonok, and A. M. Popov. "Optical-Mechanical Analogy Approach for the Purposes of Detection of IR-MW Radiation." EPJ Web of Conferences 195 (2018): 05002. http://dx.doi.org/10.1051/epjconf/201819505002.

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14

Joas, Christian, and Christoph Lehner. "The classical roots of wave mechanics: Schrödinger's transformations of the optical-mechanical analogy." Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 40, no. 4 (2009): 338–51. http://dx.doi.org/10.1016/j.shpsb.2009.06.007.

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15

Padinhattayil, Sanoop, and K. Sheshappa Rai. "Analogy and Comparative Study of Hydroxypropyl Methylcellulose (HPMC) Biopolymer with Graphene Oxide and Zinc Oxide Nano Fillers." Asian Journal of Chemistry 33, no. 7 (2021): 1513–18. http://dx.doi.org/10.14233/ajchem.2021.23193.

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Present study describes the analogy and comparative study of polymer nanocomposites with the known polymer matrix hydroxypropyl methylcellulose (HPMC) incorporated with graphene oxide (GO) and zinc oxide (ZnO) nanoparticles as nano fillers. The polymer nanocomposite films were carried out using solution casting method and characterized by IR spectroscopy, XRD analysis, mechanical properties, thermal characterization and optical microscopy analysis. There were several changes in the HPMC polymer by the addition of nanoparticles of GO and ZnO in structural, thermal, mechanical and optical proper

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16

Jost, Bradley M. "One-dimensional photonic bandgap structures and the analogy between optical and quantum mechanical tunnelling." European Journal of Physics 18, no. 2 (1997): 108–12. http://dx.doi.org/10.1088/0143-0807/18/2/010.

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17

Edwards, Matthew R. "Gravity from refraction of CMB photons using the optical-mechanical analogy in general relativity." Astrophysics and Space Science 351, no. 2 (2014): 401–6. http://dx.doi.org/10.1007/s10509-014-1864-4.

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18

Rozenman, Georgi Gary, Shenhe Fu, Ady Arie, and Lev Shemer. "Quantum Mechanical and Optical Analogies in Surface Gravity Water Waves." Fluids 4, no. 2 (2019): 96. http://dx.doi.org/10.3390/fluids4020096.

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We present the theoretical models and review the most recent results of a class of experiments in the field of surface gravity waves. These experiments serve as demonstration of an analogy to a broad variety of phenomena in optics and quantum mechanics. In particular, experiments involving Airy water-wave packets were carried out. The Airy wave packets have attracted tremendous attention in optics and quantum mechanics owing to their unique properties, spanning from an ability to propagate along parabolic trajectories without spreading, and to accumulating a phase that scales with the cubic po

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19

Goulart, E. "Mimicking General Relativity with Newtonian Dynamics." ISRN Mathematical Physics 2012 (November 10, 2012): 1–15. http://dx.doi.org/10.5402/2012/260951.

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The aim of this paper is twofolded. (1) Showing that Newtonian mechanics of point particles in static potentials admits an alternative description in terms of effective riemannian spacetimes. (2) Using the above geometrization scheme to investigate aspects of the gravitational field as it appears in the Einstein theory. It is shown that the mechanical (3 + 1) effective metrics are quite similar to Gordon's metric, as it is suggested by the well-known optical-mechanical analogy. Some special potentials are worked out.

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20

Schegolev, Andrey E., Nikolay V. Klenov, Anna V. Bogatskaya, Rustam D. Yusupov, and Alexander M. Popov. "A Pair of Coupled Waveguides as a Classical Analogue for a Solid-State Qubit." Sensors 22, no. 21 (2022): 8286. http://dx.doi.org/10.3390/s22218286.

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We have determined conditions when a pair of coupled waveguides, a common element for integrated room-temperature photonics, can act as a qubit based on a system with a double-well potential. Moreover, we have used slow-varying amplitude approximation (SVA) for the “classical” wave equation to study the propagation of electromagnetic beams in a couple of dielectric waveguides both analytically and numerically. As a part of an extension of the optical-mechanical analogy, we have considered examples of “quantum operations” on the electromagnetic wave state in a pair of waveguides. Furthermore, w

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21

Rechcińska, Katarzyna, Mateusz Król, Rafał Mazur, et al. "Engineering spin-orbit synthetic Hamiltonians in liquid-crystal optical cavities." Science 366, no. 6466 (2019): 727–30. http://dx.doi.org/10.1126/science.aay4182.

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Spin-orbit interactions lead to distinctive functionalities in photonic systems. They exploit the analogy between the quantum mechanical description of a complex electronic spin-orbit system and synthetic Hamiltonians derived for the propagation of electromagnetic waves in dedicated spatial structures. We realize an artificial Rashba-Dresselhaus spin-orbit interaction in a liquid crystal–filled optical cavity. Three-dimensional tomography in energy-momentum space enabled us to directly evidence the spin-split photon mode in the presence of an artificial spin-orbit coupling. The effect is obser

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22

Pinto, Fabrizio. "Nanomechanical sensing of gravitational wave-induced Casimir force perturbations." International Journal of Modern Physics D 23, no. 12 (2014): 1442001. http://dx.doi.org/10.1142/s0218271814420012.

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It is shown by means of the optical medium analogy that the static Casimir force between two conducting plates is modulated by gravitational waves. The magnitude of the resulting force changes within the range of already existing small force metrology. It is suggested to enhance the effects on a Casimir force oscillator by mechanical parametric amplification driven by periodic illumination of interacting semiconducting boundaries. This represents a novel opportunity for the ground-based laboratory detection of gravitational waves on the nanoscale.

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23

SMITH, RUSSELL. "Optical reflection and mechanical rebound: the shift from analogy to axiomatization in the seventeenth century. Part 2." British Journal for the History of Science 41, no. 2 (2007): 187–207. http://dx.doi.org/10.1017/s0007087407000374.

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24

Evans, James, Kamal K. Nandi, and Anwarul Islam. "The optical–mechanical analogy in general relativity: New methods for the paths of light and of the planets." American Journal of Physics 64, no. 11 (1996): 1404–15. http://dx.doi.org/10.1119/1.18366.

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25

Evans, James, Kamal K. Nandi, and Anwarul Islam. "The optical-mechanical analogy in general relativity: Exact Newtonian forms for the equations of motion of particles and photons." General Relativity and Gravitation 28, no. 4 (1996): 413–39. http://dx.doi.org/10.1007/bf02105085.

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26

Akram, Shazad, Kent Bertilsson, and Johan Siden. "LTspice Electro-Thermal Model of Joule Heating in High Density Polyethylene Optical Fiber Microducts." Electronics 8, no. 12 (2019): 1453. http://dx.doi.org/10.3390/electronics8121453.

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At present, optical fiber microducts are joined together by mechanical type joints. Mechanical joints are bulky, require more space in multiple duct installations, and have poor water sealing capability. Optical fiber microducts are made of high-density polyethylene which is considered best for welding by remelting. Mechanical joints can be replaced with welded joints if the outer surface layer of the optical fiber microduct is remelted within one second and without thermal damage to the inner surface of the optical fiber duct. To fulfill these requirements, an electro-thermal model of Joule h

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27

Lima, Nathan, and Ricardo Karam. "Schrödinger’s equation from Snell’s law." European Journal of Physics 43, no. 3 (2022): 035402. http://dx.doi.org/10.1088/1361-6404/ac5635.

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Abstract A new derivation of Schrödinger’s equation is presented, based on Schrödinger’s original discussions on refraction and the optical-mechanical analogy, but adopting a much simpler formalism: Newtonian mechanics and some basic elements of classical wave theory (such as Snell’s law). We compare how particles and waves refract and show that the ‘law of particle refraction’ and the ‘law of wave refraction’ may become consistent if one assumes that a particle can be represented by a wave group. In this case, the differential equation whose solutions represent the waves forming such wave gro

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28

Juarez-Morales, J. C., and M. Lourdes Granados-Marin. "Description of Dipole Moment Coupling Depending on Time Using Catastrophe Theory in Metallic Nanoparticles." Advanced Materials Research 718-720 (July 2013): 47–51. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.47.

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We describe the non-harmonic dipole moment resulting of the interaction between a set of nanoparticles randomly distributed with a linear polarized plane wave. The study is performed by considering its structural parameters as function of time establishing a mechanical analogy with a spring less system. The simplest case occurs for two nanoparticles and the Mathieu differential equation describes the dipole interaction, from which interesting resonance effects are predicted. We show that an effective refractive index depending of time is obtained having the possibility to take negative values

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29

Le, Thi Xiu, Michel Bornert, Ross Brown, et al. "Combining Optical Microscopy and X-ray Computed Tomography Reveals Novel Morphologies and Growth Processes of Methane Hydrate in Sand Pores." Energies 14, no. 18 (2021): 5672. http://dx.doi.org/10.3390/en14185672.

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Understanding the mechanisms involved in the formation and growth of methane hydrate in marine sandy sediments is crucial for investigating the thermo-hydro-mechanical behavior of gas hydrate marine sediments. In this study, high-resolution optical microscopy and synchrotron X-ray computed tomography were used together to observe methane hydrate growing under excess gas conditions in a coarse sandy sediment. The high spatial and complementary temporal resolutions of these techniques allow growth processes and accompanying redistribution of water or brine to be observed over spatial scales down

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30

Шумилович, Богдан, Bogdan Shumilovich, Андрей Сущенко, Andrew Sushchenko, Алексей Морозов, and Aleksey Morozov. "SYSTEM OF DIRECT COMPOSITE VENEERS COMPONEER. WORK DIFFICULTIES AND WAYS OF OVERCOMING THEM." Actual problems in dentistry 11, no. 3 (2015): 14–24. http://dx.doi.org/10.18481/2077-7566-2015-11-3-4-14-24.

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<p>A system of finished Componeer composite veneers is a unique and having no analogy in the world elaboration of the Swiss company <em>Coltene/Whaledent</em>, an outcome of almost half a century experience of the company working in a field of composite materials. It combines the best features of direct and indirect restoration methods. The system is fulfilled of nano-composite Synergy D6 that has high mechanical strength, convenience for workable consistency, color stability and a system of halftone shades, which facilitates color matching. All this allows achieving excellen

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31

Lai, H. M., Lai‐Yung Leung, Kwok‐Leung Lee, and K. P. Chik. "Mechanical analog of optical retarders." American Journal of Physics 54, no. 5 (1986): 455–58. http://dx.doi.org/10.1119/1.14614.

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32

Mazauric, Vincent, Ariane Millot, Claude Le Pape-Gardeux, and Nadia Maïzi. "Optimal approaches to manage power system decarbonation." International Journal of Applied Electromagnetics and Mechanics 64, no. 1-4 (2020): 1447–52. http://dx.doi.org/10.3233/jae-209464.

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To overcome the negative environemental impact of the actual power system, an optimal description of quasi-static electromagnetics relying on a reversible interpretation of the Faraday’s law is given. Due to the overabundance of carbon-free energy sources, this description makes it possible to consider an evolution towards an energy system favoring low-carbon technologies. The management for changing is then explored through a simplified linear-programming problem and an analogy with phase transitions in physics is drawn.

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33

Vardeny, Z. "Soliton defects in trans-(CH)x and dangling bond defects in a-Si:H; A surprising analogy." Synthetic Metals 28, no. 3 (1989): D247—D252. http://dx.doi.org/10.1016/0379-6779(89)90699-1.

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34

Symotiuk, Nazar. "Historical aspect of the development of op-art late XX – beginning of XXI century." Bulletin of Lviv National Academy of Arts, no. 39 (2019): 288–300. http://dx.doi.org/10.37131/2524-0943-2019-39-20.

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Background. Analyzing the recent publications one can observe that scientists are quite interested in optical art. The issues of op-art in the Ukrainian art have been investigated by V.Kosiv, N.Diadiukh-Bohatko and L.Andrushko, I.Kuznetsova and O.Arbuzova, S.Bodnarenko and V.Nekrasa. The research of foreign scientists, where the authors argue that studies in fine arts can bring important conclusions about the visual system, is of importance in the development of this topic.Therefore, analyzing the processes of the development of traditional and modern artistic forms, it can be stated that op-a

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35

Hijmans, T. W., H. B. Brom, and L. J. de Jongh. "The incommensurate phase in spin-Peierls systems and its analogy with the regular Peierls problem: A resonance study." Synthetic Metals 19, no. 1-3 (1987): 373–78. http://dx.doi.org/10.1016/0379-6779(87)90382-1.

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36

KOLOTVINA, OLGA V. "IMMERSIVE TECHNOLOGIES OF J. VAL DEL OMAR’S MEDIA ART (“APANORAMIC IMAGE OVERFLOW”, “DIAPHONY”, “TACTILE VISION”) AS AN EXPRESSION OF HIS CONCEPT OF “MECHANICAL MYSTICISM”." ART AND SCIENCE OF TELEVISION 17, no. 1 (2021): 51–71. http://dx.doi.org/10.30628/1994-9529-2021-17.1-51-71.

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The article analyzes three media technologies for creating an immersive polysensory environment, developed back in 1940–1960s by the Spanish film director and engineer Jose Val del Omar. The technologies are considered in the context of the director’s key concept, which he called “mechanical mysticism”. It was aimed at creating a cinematic analogy of mystical experience by transforming the mysticism of Spanish culture into cinematic technologies. The author reveals how the conversion of the suggestive artistic potential of Spanish mysticism into the immersiveness of film technologies allowed J

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37

Craven, J. M., E. Meeks, G. Delich, E. Ayars, H. K. Pechkis, and J. A. Pechkis. "A low-cost shutter driver and arbitrary waveform generator for optical switching using a programmable system-on-chip (PSoC) device." Review of Scientific Instruments 93, no. 11 (2022): 113002. http://dx.doi.org/10.1063/5.0105884.

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We have developed a low-cost mechanical shutter driver with integrated arbitrary waveform generation for optical switching and control using a programmable system-on-chip device. This microcontroller-based device with configurable digital and analog blocks is readily programmed using free software, allowing for easy customization for a variety of applications. Additional digital and analog outputs with arbitrary timings can be used to control a variety of devices, such as additional shutters, acousto-optical modulators, or camera trigger pulses, for complete control and imaging of laser light.

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38

Kondrin, Mikhail V., Yulia B. Lebed, and Vadim V. Brazhkin. "Structure and topology of three-dimensional hydrocarbon polymers." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 72, no. 4 (2016): 634–41. http://dx.doi.org/10.1107/s2052520616007253.

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A new family of three-dimensional hydrocarbon polymers which are more energetically favorable than benzene is proposed. Although structurally these polymers are closely related to well known diamond and lonsdaleite carbon structures, using topological arguments we demonstrate that they have no known structural analogs. Topological considerations also give some indication of possible methods of synthesis. Taking into account their exceptional optical, structural and mechanical properties these polymers might have interesting applications.

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39

Grechishnikov, V. M., and E. G. Komarov. "Increasing the information capacity of a fiber-optic multi-sensor converter of binary mechanical signals into electrical signals." Izmeritel`naya Tekhnika, no. 9 (2020): 15–23. http://dx.doi.org/10.32446/0368-1025it.2020-9-15-23.

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The design and operation principle of a multi-sensor Converter of binary mechanical signals into electrical signals based on a partitioned fiber-optic digital-to-analog Converter with a parallel structure is considered. The digital-to-analog Converter is made from a set of simple and technological (three to five digit) fiber-optic digital-to-analog sections. The advantages of the optical scheme of the proposed. Converter in terms of metrological and energy characteristics in comparison with single multi-bit converters are justified. It is shown that by increasing the number of digital-analog s

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40

Sachdeva, Geeta, Sumandeep Kaur, Ravindra Pandey, and Shashi P. Karna. "First-Principles Study of Linear and Nonlinear Optical Properties of Multi-Layered Borophene." Computation 9, no. 9 (2021): 101. http://dx.doi.org/10.3390/computation9090101.

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Anisotropic materials are of great interest due to their unique direction-dependent optical properties. Borophene, the two-dimensional analog of graphene consisting of boron atoms, has attracted immense research interest due to its exciting anisotropic electronic and mechanical properties. Its synthesis in several structural polymorphic configurations has recently been reported. The present work reports the layer-dependent optical absorption and hyperpolarizabilities of the buckled borophene (δ6-borophene). The results, based on density functional theory, show that multilayer borophene is near

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41

Parafiniak, Maciej. "Experimental testing of mechanical properties of 3D FDM printed material using optical, non-contact displacement measurement technology." Mechanik, no. 12 (December 2016): 1852–55. http://dx.doi.org/10.17814/mechanik.2016.12.578.

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Wojewnik, Piotr, and Jakub Żmigrodzki. "An infrared-based device for non-invasive monitoring of eyelid movement during sleep." Polish Journal of Medical Physics And Engineering 19, no. 2 (2014): 85–91. http://dx.doi.org/10.2478/pjmpe-2013-0004.

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Abstract The increased movement of eyes and eyelids is characteristic of the rapid eye movement (REM) sleep stage, making it an important indicator in sleep monitoring. A device was designed to detect this activity in a non-invasive way by means of measuring infrared light intensity reflected off the eyelid. The system converts the light intensity into current through a photodetector, performs analog signal processing and analog to digital conversion (ADC). The data is transmitted wirelessly to a computer, where the results can be displayed, stored and analyzed with a dedicated software, which

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43

Trajin, Baptiste, and Paul-Etienne Vidal. "Bond graph multi-physics modeling of encapsulating materials in power electronic modules." European Physical Journal Applied Physics 89, no. 2 (2020): 20902. http://dx.doi.org/10.1051/epjap/2020180287.

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This paper focuses on multi-physics modeling of encapsulating gels in power electronic modules for transient and steady-state simulation. With the emergence of wide-bandgap semiconductors such as SiC or GaN, operating at a higher temperature than conventional Si power chips, this passive element of the packaging appears as a few studied element sensitive to thermal and mechanical stresses. A thermo-mechanical coupled modeling of the material, based on bond graph representation, is presented. This approach allows to establish, under the same formalism, an analogy between the different physical

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44

Shoydin, Sergey A., and Artem L. Pazoev. "CORRECTION OF PROJECTIVE DEFORMATIONS OF 3D OBJECT, ON THE STAGE OF HOLOGRAM FORMATION." Interexpo GEO-Siberia 8, no. 1 (2020): 97–107. http://dx.doi.org/10.33764/2618-981x-2020-8-1-97-107.

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The problems of digital synthesis of holograms associated with a discrete representation of a signal forming a holographic image are analyzed. One of the significant limitations is the technological problems of the formation of holographic structures pointwise due to diffraction limitations of the size of the focused spot of the optical-mechanical builder. This narrows the spectrum of possible spatial frequencies of the pointwise synthesized hologram in comparison with the classical hologram recorded in an analog way, which in turn leads to difficulties in recording holograms with a large dept

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45

Fuhrer, Michael S., Chun Ning Lau, and Allan H. MacDonald. "Graphene: Materially Better Carbon." MRS Bulletin 35, no. 4 (2010): 289–95. http://dx.doi.org/10.1557/mrs2010.551.

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AbstractGraphene, a single atom–thick plane of carbon atoms arranged in a honeycomb lattice, has captivated the attention of physicists, materials scientists, and engineers alike over the five years following its experimental isolation. Graphene is a fundamentally new type of electronic material whose electrons are strictly confined to a two-dimensional plane and exhibit properties akin to those of ultrarelativistic particles. Graphene's two-dimensional form suggests compatibility with conventional wafer processing technology. Extraordinary physical properties, including exceedingly high charg

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46

Sakuldeemeekiat, Thamolchanok, Natchaya Luamsri, Jatuphorn Wootthikanokkhan, and Manisara Phiriyawirut. "The effects of thermochromic pigments on optical, mechanical, and heat insulation properties of plasticized PVC window film." Journal of Thermoplastic Composite Materials 33, no. 9 (2019): 1196–216. http://dx.doi.org/10.1177/0892705718820392.

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In this study, a feasibility for developing window films for energy efficiency in building based on poly(vinyl chloride) (PVC) composite was explored, using two different types of thermochromic pigments, such as vanadium dioxide (VO2) and thermoreversal-40. Using VO2, tensile properties of the PVC film improved, accompanied with an increase of percentage gelation of PVC. On the other hand, thermochromic behaviors, in the visible light region of the PVC/thermoreversal-40 film, were more obvious than those of the PVC/VO2 analog. The percentage of transmittance of the near infrared wave through t

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47

Grinchuk, P. S., H. Abuhimd, A. V. Akulich, et al. "High thermal conductivity silicon-carbide ceramics for large-size space optics." Doklady of the National Academy of Sciences of Belarus 63, no. 2 (2019): 223–34. http://dx.doi.org/10.29235/1561-8323-2019-63-2-223-234.

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The paper describes the important aspects of the developed technology for manufacturing silicon-carbide substrates for optical mirrors intended for future use in space applications. It is shown that the material with the best combination of thermophysical and mechanical properties (Maksutov’s criterion) among the known analogs used for making astronomical mirrors is obtained. The characteristics of a mirror made of a lightweight mirror substrate with a diameter of 205 mm are described, compared with the parameters of most known mirrors made of silicon carbide for various space missions and as

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Gurauskis, Donatas, Artūras Kilikevičius, and Sergejus Borodinas. "Experimental Investigation of Linear Encoder’s Subdivisional Errors under Different Scanning Speeds." Applied Sciences 10, no. 5 (2020): 1766. http://dx.doi.org/10.3390/app10051766.

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Optical encoders are widely used in applications requiring precise displacement measurement and fluent motion control. To reach high positioning accuracy and repeatability, and to create a more stable speed-control loop, essential attention must be directed to the subdivisional error (SDE) of the used encoder. This error influences the interpolation process and restricts the ability to achieve a high resolution. The SDE could be caused by various factors, such as the particular design of the reading head and the optical scanning principle, quality of the measuring scale, any kind of relative o

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Dalvit, Diego A. R., and Wilton J. M. Kort-Kamp. "Shaping Dynamical Casimir Photons." Universe 7, no. 6 (2021): 189. http://dx.doi.org/10.3390/universe7060189.

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Temporal modulation of the quantum vacuum through fast motion of a neutral body or fast changes of its optical properties is known to promote virtual into real photons, the so-called dynamical Casimir effect. Empowering modulation protocols with spatial control could enable the shaping of spectral, spatial, spin, and entanglement properties of the emitted photon pairs. Space–time quantum metasurfaces have been proposed as a platform to realize this physics via modulation of their optical properties. Here, we report the mechanical analog of this phenomenon by considering systems in which the la

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Gordeyev, Stanislav, Adam E. Smith, Jacob A. Cress, and Eric J. Jumper. "Experimental studies of aero-optical properties of subsonic turbulent boundary layers." Journal of Fluid Mechanics 740 (January 5, 2014): 214–53. http://dx.doi.org/10.1017/jfm.2013.658.

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AbstractThis paper gives the most-complete characterization to date of the optical aberrations imposed on a laser beam propagated through a subsonic, compressible, turbulent boundary layer in a zero-pressure gradient environment, over a range of boundary-layer thicknesses, oblique propagation angles and Mach numbers. This characterization is based on optical measurements using optical-wavefront-sensing instruments that have only become available in the last decade. The optical characterization includes and discusses in detail: optical-wavefront spectra, convective velocities of optically activ

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