Готові списки джерел за темами / Light interference

Добірка наукової літератури з теми "Light interference"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Light interference"

1

Zhi-Xin, Yao, Zhong Jian-Wei, Mao Bang-Ning, and Pan Bai-Liang. "Interference nature of light." Chinese Physics B 17, no. 2 (February 2008): 578–84. http://dx.doi.org/10.1088/1674-1056/17/2/037.

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2

Charas, Seymour. "Interference and polarized light." Physics Teacher 26, no. 9 (December 1988): 570. http://dx.doi.org/10.1119/1.2342627.

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3

Belyaeva, A. I., V. I. Goncharenko, A. P. Silka, and R. G. Yarovaya. "Multichannel interference light filters." Journal of Applied Spectroscopy 52, no. 2 (February 1990): 214–17. http://dx.doi.org/10.1007/bf00661437.

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4

Shah, Samit, Subhashree Rangarajan, and Simon H. Friedman. "Light-Activated RNA Interference." Angewandte Chemie International Edition 44, no. 9 (February 18, 2005): 1328–32. http://dx.doi.org/10.1002/anie.200461458.

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5

Shah, Samit, Subhashree Rangarajan, and Simon H. Friedman. "Light-Activated RNA Interference." Angewandte Chemie 117, no. 9 (February 18, 2005): 1352–56. http://dx.doi.org/10.1002/ange.200461458.

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6

Liu, Wei, and Yuri S. Kivshar. "Multipolar interference effects in nanophotonics." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2090 (March 28, 2017): 20160317. http://dx.doi.org/10.1098/rsta.2016.0317.

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Scattering of electromagnetic waves by an arbitrary nanoscale object can be characterized by a multipole decomposition of the electromagnetic field that allows one to describe the scattering intensity and radiation pattern through interferences of dominating multipole modes excited. In modern nanophotonics, both generation and interference of multipole modes start to play an indispensable role, and they enable nanoscale manipulation of light with many related applications. Here, we review the multipolar interference effects in metallic, metal–dielectric and dielectric nanostructures, and suggest a comprehensive view on many phenomena involving the interferences of electric, magnetic and toroidal multipoles, which drive a number of recently discussed effects in nanophotonics such as unidirectional scattering, effective optical antiferromagnetism, generalized Kerker scattering with controlled angular patterns, generalized Brewster angle, and non-radiating optical anapoles. We further discuss other types of possible multipolar interference effects not yet exploited in the literature and envisage the prospect of achieving more flexible and advanced nanoscale control of light relying on the concepts of multipolar interference through full phase and amplitude engineering. This article is part of the themed issue ‘New horizons for nanophotonics’.
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7

Wang, Zhuo, Daniel L. Marks, Paul Scott Carney, Larry J. Millet, Martha U. Gillette, Agustin Mihi, Paul V. Braun, Zhen Shen, Supriya G. Prasanth, and Gabriel Popescu. "Spatial light interference tomography (SLIT)." Optics Express 19, no. 21 (September 27, 2011): 19907. http://dx.doi.org/10.1364/oe.19.019907.

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Wang, Zhuo, Larry Millet, Mustafa Mir, Huafeng Ding, Sakulsuk Unarunotai, John Rogers, Martha U. Gillette, and Gabriel Popescu. "Spatial light interference microscopy (SLIM)." Optics Express 19, no. 2 (January 7, 2011): 1016. http://dx.doi.org/10.1364/oe.19.001016.

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Schmitt, J. M., A. Knüttel, and J. R. Knutson. "Interference of diffusive light waves." Journal of the Optical Society of America A 9, no. 10 (October 1, 1992): 1832. http://dx.doi.org/10.1364/josaa.9.001832.

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Guzman-Sepulveda, J. R., and A. Dogariu. "Multimode interference dynamic light scattering." Optics Letters 43, no. 17 (August 28, 2018): 4232. http://dx.doi.org/10.1364/ol.43.004232.

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Дисертації з теми "Light interference"

1

Shah, Samit Friedman Simon H. "Light activated RNA interference." Diss., UMK access, 2007.

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Thesis (Ph. D.)--School of Pharmacy and Dept. of Chemistry. University of Missouri--Kansas City, 2007.
"A dissertation in pharmaceutical science and chemistry." Advisor: Simon H. Friedman. Typescript. Vita. Description based on contents viewed July 16, 2008; title from "catalog record" of the print edition. Includes bibliographical references (leaves 206-220). Online version of the print edition.
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2

Kim, Hyunsu. "Interference lithography with extreme ultraviolet light." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/410353/.

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In photolithography, increasing pattern density is a key issue for development of semiconductor devices. Extreme ultraviolet (EUV) radiation is the next generation light source for overcoming the resolution limit of conventional photolithography in order to obtain nanostructures of higher density. In this thesis, we focus on investigating resolution limits of interference patterns produced by EUV radiation. Optical properties of interference fringes obtained using different types of compact EUV sources are studied with regard to increasing pattern density. Rigorous simulations of optical wave propagation of EUV radiation are performed to investigate the resolution limits of interference fringes for the fractional Talbot effect, the achromatic Talbot effect, and an image of Talbot carpet that has an optical property of ever-decreasing size of interference fringes. In experiments, interference lithography has been performed with three different types of compact EUV sources including a gas discharge produced plasma, a plasma based EUV laser, and a high-harmonic generation source. We analyze optical characteristics of particular EUV sources resulting in different capabilities of patterning. Also different optical system designs capable of overcoming the limitations of optical properties of EUV radiation are investigated. We expect that the study of EUV interference lithography can be helpful for understanding the upcoming photolithography resolution and also can be useful as a technology for fabricating very fine structures.
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3

Wilson, Rebecca Anne. "The electron-beam tunable interference filter spatial light modulator." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/1494.

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4

Chen, Zhe. "Interference mitigation techniques for optical attocell networks." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/22868.

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The amount of wireless data traffic has been increasing exponentially. This results in the shortage of radio frequency (RF) spectrum. In order to alleviate the looming spectrum crisis, visible light communication (VLC) has emerged as a supplement to RF techniques. VLC uses light emitting diodes (LEDs) for transmission and employs photodiodes (PDs) for detection. With the advancement of the LED technology, LEDs can now fulfil two functions at the same time: illumination and high-speed wireless communication. In a typical indoor scenario, each single light fixture can act as an access point (AP), and multiple light fixtures in a room can form a cellular wireless network. We refer to this type of networks as ‘optical attocell network’. This thesis focuses on interference mitigation in optical attocell networks. Firstly, the downlink inter-cell interference (ICI) model in optical attocell networks is investigated. The conventional ray-tracing channel model for non-line-of-sight (NLOS) path is studied. Although this model is accurate, it leads to time-consuming computer simulations. In order to reduce the computational complexity, a simplified channel model is proposed to accurately characterise NLOS ICI in optical attocell networks. Using the simplified model, the received signal-to-interference-plus-noise ratio (SINR) distribution in optical attocell networks can be derived in closed-form. This signifies that no Monte Carlo simulation is required to evaluate the user performance in optical attocell networks. Then, with the knowledge of simplified channel model, interference mitigation techniques using angle diversity receivers (ADRs) are investigated in optical attocell networks. An ADR typically consists of multiple PDs with different orientations. By using proper signal combining schemes, ICI in optical attocell networks can be significantly mitigated. Also, a novel double-source cell configuration is proposed. This configuration can further mitigate ICI in optical attocell networks in conjunction with ADRs. Moreover, an analytical framework is proposed to evaluate the user performance in optical attocell networks with ADRs. Finally, optical space division multiple access (SDMA) using angle diversity transmitters is proposed and investigated in optical attocell networks. Optical SDMA can exploit the available bandwidth resource in spatial dimension and mitigate ICI in optical attocell networks. Compared with optical time division multiple access (TDMA), optical SDMA can significantly improve the throughput of optical attocell networks. This improvement scales with the number of LED elements on each angle diversity transmitter. In addition, the upper bound and the lower bound of optical SDMA performance are derived analytically. These bounds can precisely evaluate the performance of optical SDMA systems. Furthermore, optical SDMA is shown to be robust against user position errors, and this makes optical SDMA suitable for practical implementations.
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Bhattarai, Khagendra Prasad. "Interference of Light in Multilayer Metasurfaces: Perfect Absorber and Antireflection Coating." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6680.

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We have studied several metamaterials structures with multiple layers by explaining them theoretically and verifying experimentally. The engineered structures we have designed work either as a perfect absorber or antireflection coating. The multilayer model as we call it Three Layer Model (TLM) has been developed, which gives the total reflection and transmission as a function of reflection and transmission of individual layers. By manipulating the amplitude and phase of the reflection and the transmission of the individual layers, we can get the required functionality of the optoelectronic devices. To get zero reflection in the both perfect absorber and the antireflection coating, the amplitude and phase conditions should be satisfied simultaneously. We have employed the numerical simulation of the structures to verify those conditions for all of the work presented here. As the theoretical retrieval method to extract the effective permittivity and effective permeability of the metamaterial contains air on the both side of the structure, we have dielectric at least on one side practically, that gives a little bit deviated result. We have modified the retrieval method to better fit with the multilayer structure by introducing air on the both side of the resonator using transfer matrix method and use it throughout all the works. We have explained the perfect absorption of the EM wave through Fabry-Perot cavity bounded by the resonator mirror and the metallic film. The metallic film acts as the close boundary whereas the resonator acts as the quasi-open boundary with very high effective permittivity, which leads to the characteristic feature of subwavelength thickness. We have shown numerically that the ultra-thin thickness makes the perfect absorber angular independent. We have also explained the phenomenon of perfect absorption through Impedance Matched Theory and Transmission Line Theory, and showed their matching with TLM. We have also developed the Meta Film Model by considering the resonator as a homogeneous thin film characterized by the effective permittivity and permeability giving rise to the same behavior as the original multilayer structure. We have shown that the resonance of the metamaterial resonator is very far from the resonance of the absorber, it behaves as the medium of high refractive index and very low loss. We have also shown that the density of states of the absorber is increased as compared to the resonator itself. We have investigated that the resonance peaks of the absorber arise from the combination of Fabry- Perot cavity modes and surface plasmon resonance modes. All the modes with increased spacer thickness are assigned with specific names describing the mode profiles. We have shown the application of perfect absorber as a refractive index sensor. It is used as a plasmonic sensor to detect the refractive index change of the chemical and biological samples. To increase the sensitivity, we have etched the dielectric spacer below the resonator, where electric field is localized and enhanced. We have found that the sensitivity (wavelength shift per refractive index change) and the Figure of Merit (FOM*) as an indicator of performance of the device both are enhanced significantly. We have employed metamaterial (MM) anti-reflection (AR) coating to avoid the shortcomings of the conventional thin film coating in three different cases of the structures. At first, we have deployed metamaterial Metal Disk Array (MDA) on the top of conventional coating material (BCB) with homogeneous substrate to enhance the transmission of EM wave. Then conventional AR coating is employed to the dispersive media (metal Hole Array) to enhance the transmission. We have shown that Impedance matched condition has been satisfied not only for homogeneous media, but for dispersive media also. At the end, we have employed the MM AR coating to the MM dispersive media (MHA). The two MM layers may interact with each other and may degrade the SPP wave of the MHA, which is essential to enhance the performance of the devices. To investigate the effect of interaction, we perform the simulation of the MDA, which shows that the resonance of the MDA is far from the antireflection resonance and hence the electric field of the SPP is significantly increased (~30%). With an improved retrieval method, the metasurface is proved to exhibit a high effective permittivity (εeff~30) and extremely low loss (tanδ~0.005). For all of the three AR structures, a classical thin film AR coating mechanism is identified through analytical derivations and numerical simulations. The properly designed εeff and μeff of the meta surface lead to the required phase and amplitude conditions for the AR coating, thereby paving the way for the improved performance of the optoelectronic devices. We have used MHA as a dispersive media to get extraordinary optical transmission (EOT). To understand the behavior of the SPP peaks, we have investigated the shifting and splitting of the spoof SPP resonance by varying the polar angle and azimuthal angle. The amplitude of extraordinary optical transmission also shows angle dependence and exhibits mirror-image or translational symmetries. Our measurements and simulations of the THz spoof SPP waves match very well with the theoretical predictions. The angle dependence results provide the important information for designing THz plasmonic devices in sensor and detector applications.
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6

Noorizadeh, Sahand. "SLM-based Fourier Differential Interference Contrast Microscopy." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/2011.

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Optical phase microscopy provides a view of objects that have minimal to no effect on the detected intensity of light that are unobservable by standard microscopy techniques. Since its inception just over 60 years ago that gave us a vision to an unseen world and earned Frits Zernike the Nobel prize in physics in 1953, phase microscopy has evolved to find various applications in biological cell imaging, crystallography, semiconductor failure analysis, and more. Two common and commercially available techniques are phase contrast and differential interference contrast (DIC). In phase contrast method, a large portion of the unscattered light that accounts for the majority of the light passing unaffected through a transparent medium is blocked to allow the scattered light due to the object to be observed with higher contrast. DIC is a self-referenced interferometer that transduces phase variation to intensity variation. While being established as fundamental tools in many scientific and engineering disciplines, the traditional implementation of these techniques lacks the ability to provide the means for quantitative and repeatable measurement without an extensive and cumbersome calibration. The rapidly growing fields in modern biology meteorology and nano-technology have emphasized the demand for a more robust and convenient quantitative phase microscopy. The recent emergence of modern optical devices such as high resolution programmable spatial light modulators (SLM) has enabled a multitude of research activities over the past decade to reinvent phase microscopy in unconventional ways. This work is concerned with an implementation of a DIC microscope containing a 4-f system at its core with a programmable SLM placed at the frequency plane of the imaging system that allows for employing Fourier pair transforms for wavefront manipulation. This configuration of microscope provides a convenient way to perform both wavefront shearing with quantifiable arbitrary shear amount and direction as well as phase stepping interferometry by programming the SLM with a series of numerically generated patterns and digitally capturing interferograms for each step which are then used to calculate the objects phase gradient map. Wavefront shearing is performed by generating a pattern for the SLM where two phase ramp patterns with opposite slopes are interleaved through a random selection process with uniform distribution in order to mimic the simultaneous presence of the ramps on the same plane. The theoretical treatment accompanied by simulations and experimental results and discussion are presented in this work.
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7

Allan, James Donald Campbell. "An application of optical interference to dynamic position measurement in three dimensions." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/6627.

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This thesis is concerned with the measurement of the positions of points and bodies moving in trajectories in three dimensions, and the use of a new technique of optical interference which allows such measurements to be made dynamically. A variety of existing techniques for both static and dynamic three-dimensional position measurement are discussed, and the design of the new interferometer is introduced. The geometry of points, curves and surfaces in three dimensions is examined, with emphasis on the intersection of the point loci represented by the coordinate output of measuring instruments. The coordinates output by the interferometer represent surface loci which are quadric surfaces. A method of calculating the position and orientation of a body using three quadric surface intersection curves is presented. Diffraction of monochromatic light at an aperture is considered and it is shown that an interferometer working by division of wavefront can be used to obtain continuous information about the movement of the source of radiation, with that source free to move in up to three dimensions. A lens may be used to produce a compact instrument based on these principles. The diffraction integral equations are modified to incorporate the effect of a lens in the diffraction field. It is shown that even complex lenses can be represented by a few parameters in the diffraction equations. From the evaluation of these diffraction integrals, it is shown how the movement of interference fringes provides a coordinate output and how this is related to the locus of the radiation source. A method of obtaining very high resolution measurements of interference fringe pattern movement is presented. The interferometer was built and tested and the above theory verified in practice in a series of optical bench tests. The implementation of a system which uses this interferometer to measure the dynamic performance of industrial robots is considered. The optimum positions for the instruments are derived, and the method of designing the interferometer to give the required resolution is presented.
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8

Shankaranarayanan, N. K. "Mode-mode interference in optical fibers: analysis and experiment." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45891.

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Interference between the modes of an optical fiber generates specific mode (intensity) patterns which get modulated by disturbances in the optical fiber system. Mode-mode interference has been analyzed from first principles and a model based on differential phase modulation presented. Mode-mode interference effects such as intensity modulation of the mode patterns are directly related to differential phase modulation between modes which arises due to the difference between the propagation constants of the constituent modes. Practical implementation of modal methods involves selective launching of modes and processing of the output pattern to demodulate the information.

Axial strain has been chosen as the modulating mechanism in experiments designed to quantify mode-mode interference effects. Quasi-statically varying strain as well as vibrational strain was used to study 'dc' and 'ac' mechanisms. Specific mode combinations have been excited and their radiation patterns identified. Mode pattern changes have been described. Experimental observations and results correlate very well with analysis.


Master of Science
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9

NAHM, KIEBONG. "LIGHT SCATTERING BY POLYSTYRENE SPHERES ON A CONDUCTING PLANE (MIE, IMAGE CHARGE, INTERFERENCE, BRDF)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188071.

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A system consisting of a sphere sitting on a clean mirror was modeled as a two particle system: the real sphere and its image sphere, treating the mirror as a conducting plane. When the system was irradiated with a plane-polarized collimated laser beam with varying angles of incidence, the scattering from each particle was assumed to follow Mie's solution for light scattering by a sphere. Phase difference between the scattering by the real sphere and the one by its image sphere was assessed by the geometry of the model. The far field solutions from each of the spheres were added to yield a phase dependent intensity function. Another model assumed no phase correlation between the two and the intensities from each spheres were added. Also discussed is the Double Interaction Mode, which takes the mirror-sphere separation into consideration. These theoretical results were converted to Bidirectional Reflectance Distribution Functions (BRDF). The theoretical as well as the empirical surface scattering from a good quality optical surface was introduced. The BRDF values thus calculated were added to the background scattering by the mirror since no interaction was assumed between the spheres and the rough metallic surface of the mirror. The test sample was prepared with polystyrene spheres with the nominal diameter of 0.984 μm on a high quality aluminum mirror. The BRDF data from this sample with 6328Å and 4416Å were compared with the one obtained with the model described above. The comparison strongly indicated that there existed no phase correlation between the scatterings by the two spheres. Determination of the sphere size and practical applicability for estimating the sphere number density on the surface are also discussed.
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10

Kim, Yang-Hyo. "High resolution imaging and lithography using interference of light and surface plasmon waves." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42303.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
Includes bibliographical references (leaf 28).
The resolution of optical imaging and lithography is limited by the wave nature of light. Studies have been undertaken to overcome the diffraction limit for imaging and lithography. In our lab, the standing wave surface plasmon resonance fluorescence (SW-SPRF) microscopy was developed. It is a combination of standing wave total internal reflection fluorescence (SW-TIRF), one of structured illumination techniques, with surface plasmon resonance (SPR). The SW-TIRF approach decreases the excitation wavelength by interfering two coherent light rays on the substrate and producing an evanescent standing wave field between the object and a high refractive index substrate. Evanescent standing wave illumination generates a sinusoidal interference pattern with 2n times higher-spatial frequency than original light, where n is the refractive index of the substrate allowing higher lateral resolution. Surface plasmon is generated by reflecting a light on the gold surface through the cover glass at a specific angle inducing collective excitation of electrons in the metal. The SPR contributes a better signal-to-noise ratio by inducing an enhanced evanescent electric field to excite fluorophores. With the SW-TIRF instrument, about 100 nm resolution was obtained. In this thesis, we aim to produce less than 50 nm resolution lithography and imaging using corrugated gold surface. The induction of surface plasmon wave with large wave number is made possible by the sinusoidal gold surface allowing wave number matching between the excitation light and the surface plasmon wave. This wave number matching requires proper optimization of parameters like grating constant, perturbation depth, incidence angle of the beam, and excitation wavelength. The fabrication of the corrugated gold surface would be done by e-beam etching with varying parameters.
(cont.) For lithography, nano-patterns would be investigated on azo dye thin films, Congo-Red dye with spin-coating, exposed by an interference of evanescent waves propagating on a substrate. The result patterns would be measured with AFM. For imaging, sub-diffraction limited fluorescent particle would be used for point spread function measurement and high-resolution demonstration.
by Yang-Hyo Kim.
S.M.
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Книги з теми "Light interference"

1

Jones, Russell Celyn. An interference of light. London: Viking, 1995.

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2

Aleksandrov, E. B. Interference of atomic states. Berlin: Springer-Verlag, 1993.

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3

F, Abelès, Society of Photo-optical Instrumentation Engineers., and France. Ministère de la défense. Direction des recherches, études et techniques., eds. Optical interference coatings: 6-10 June 1994, Grenoble, France. Bellingham, Wash., USA: SPIE, 1994.

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4

America, Optical Society of, ed. Optical interference coatings: Postconference digest. Washington, DC: Optical Society of America, 2001.

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5

1936-, Peřina Jan, Hrabovský Miroslav, Křepelka Jaromír, Society of Photo-optical Instrumentation Engineers., and Research Center for Optics (Czech Republic), eds. First International Workshop on Classical and Quantum Interference: 25-26 October 2001, Olomouc, Czech Republic. Bellingham, Wash., USA: SPIE, 2002.

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6

P, Hariharan, and Malacara Daniel 1937-, eds. Selected papers on interference, interferometry, and interferometric metrology. Bellingham, Wash: SPIE Optical Engineering Press, 1995.

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7

History of the principle of interference of light. Basel: Birkhäuser Verlag, 1991.

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8

Kipnis, Nahum. History of the Principle of Interference of Light. Basel: Birkhäuser Basel, 1991. http://dx.doi.org/10.1007/978-3-0348-8652-9.

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I, Khvostenko G., and Chaĭka M. P, eds. Interferent͡s︡ii͡a︡ atomnykh sostoi͡a︡niĭ. Moskva: "Nauka," Glav. red. fiziko-matematicheskoĭ lit-ry, 1991.

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10

E, Schwarz H., ed. Light pollution: The global view : proceedings of the International Conference on Light Pollution, La Serena, Chile, held 5-7 March 2002. Dordrecht: Kluwer Academic Publishers, 2003.

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Частини книг з теми "Light interference"

1

Rossing, Thomas D., and Christopher J. Chiaverina. "Interference and Diffraction." In Light Science, 105–27. New York, NY: Springer New York, 1999. http://dx.doi.org/10.1007/978-0-387-21698-0_5.

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Rossing, Thomas D., and Christopher J. Chiaverina. "Interference and Diffraction." In Light Science, 119–48. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-27103-9_5.

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3

Chipman, Russell A., Wai-Sze Tiffany Lam, and Garam Young. "Interference of Polarized Light." In Polarized Light and Optical Systems, 91–116. Boca Raton : Taylor & Francis, CRC Press, 2019. | Series: Optical sciences and applications of light: CRC Press, 2018. http://dx.doi.org/10.1201/9781351129121-4.

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4

Françon, M., N. Krauzman, J. P. Mathieu, and M. May. "Interference in Polarized Light." In Experiments in Physical Optics, 151–66. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003062349-14.

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5

Hemsley, D. A. "Interference Microscopy of Polymers." In Applied Polymer Light Microscopy, 185–231. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-011-7474-9_6.

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Manojlović, Lazo M. "Coherence and Interference of Light." In Fiber-Optic-Based Sensing Systems, 105–51. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003277293-4.

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Rochow, Theodore George, and Paul Arthur Tucker. "Interference Microscopy." In Introduction to Microscopy by Means of Light, Electrons, X Rays, or Acoustics, 221–31. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1513-9_11.

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Hoffman, R. "Modulation Contrast and Differential Interference Contrast Techniques." In Applied Polymer Light Microscopy, 151–84. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-011-7474-9_5.

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Chen, Jian, Adrian S. Sabau, Jonaaron F. Jones, Alexandra C. Hackett, Claus Daniel, and David Warren. "Aluminum Surface Texturing by Means of Laser Interference Metallurgy." In Light Metals 2015, 427–29. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093435.ch71.

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Chen, Jian, Adrian S. Sabau, Jonaaron F. Jones, Alexandra C. Hackett, Claus Daniel, and David Warren. "Aluminum Surface Texturing by Means of Laser Interference Metallurgy." In Light Metals 2015, 427–29. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48248-4_71.

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Тези доповідей конференцій з теми "Light interference"

1

Amra, Claude, Myriam Zerrad, Michel Lequime, and Simona Liukaityte. "Instantaneous One-Angle White-Light Scatterometer." In Optical Interference Coatings. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/oic.2016.thb.11.

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2

Amra, Claude, Myriam Zerrad, and Michel Lequime. "Trapped light scattering within optical multilayers." In Optical Interference Coatings. Washington, D.C.: OSA, 2019. http://dx.doi.org/10.1364/oic.2019.thd.7.

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3

Deumié, Carole, Myriam Zerrad, Michel Lequime, Claude Amra, and Mike Ewart. "Light scattering characterization of superpolished transparent substrates." In Optical Interference Coatings. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/oic.2004.we3.

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von Finck, Alexander, Tobias Herffurth, Sven Schröder, and Angela Duparre. "Compact Light Scatter Techniques for Optical Coatings." In Optical Interference Coatings. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/oic.2013.thd.9.

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Gallais, Laurent, H. Akhouayiri, and J. Y. Amra. "Thermally-induced laser damage in interferential light absorbers." In Optical Interference Coatings. Washington, D.C.: OSA, 2001. http://dx.doi.org/10.1364/oic.2001.tuf7.

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6

Stolz, Christopher, François Y. Génin, and Thomas V. Pistor. "Light intensification by nodular defects in multilayer coatings." In Optical Interference Coatings. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/oic.2004.tuf9.

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Amra, Claude, and Carole Deumie. "Light scattering in optical multilayers: review and progress." In Optical Interference Coatings. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/oic.2004.we1.

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Hodgkinson, Ian, and Qi hong Wu. "Anisotropic antireflection coatings for light at normal incidence." In Optical Interference Coatings. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/oic.1998.the.3.

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A well known antireflection (AR) coating for an air (n a )–glass (n g ) interface and normally incident light is constructed by depositing a quarter-wave of a high index material (nH) followed by a quarter-wave of a low index material (nL).1 In this presentation we expand the scope of the AR coating so that it is antireflecting for one linear polarization which we designate p, but gives a reflectance of a few percent for the mutually perpendicular s polarization. Potential applications of the anisotropic antireflection (AAR) coating2 include polarization-selection devices for lasers, replacing the Brewster-angle plate which requires considerable space in an optical cavity.
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9

Himel, M. D., J. A. Ruffner, and U. J. Gibson. "Microstructure Effects on Light Propagation in ZnS Waveguides." In Optical Interference Coatings. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oic.1988.tua9.

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10

Deumié, C., H. Giovannini, G. Albrand, H. Akhouayri, and Claude Amra. "Ellipsometry of light scattering from thin film multilayers." In Optical Interference Coatings. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/oic.1995.wb15.

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Many studies are devoted to the study of light scattering1 in multilayer optics, and enable to improve our knowledge of microstructural parameters such as interface roughnesses and bulk inhomogeneities inside the stacks. However these studies are mainly based on the intensity of the scattered light, while phase measurements may provide additional and precious information when analysing the scattering data.
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Звіти організацій з теми "Light interference"

1

Shalom, S. V., V. V. Chumak, E. H. Haskell, R. B. Hayes, and G. H. Kenner. Properties of light induced EPR signals in enamel and their possible interference with gamma-induced signals. Office of Scientific and Technical Information (OSTI), January 1996. http://dx.doi.org/10.2172/321858.

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2

Meidan, Rina, Jorge Flores, Keith Inskeep, and David Wolfenson. Controlling the bovine ovarian cycle by disrupting the endothelin system in corpora lutea and follicles with novel approaches: RNA interference (RNAi) and intra-luteal Atrigel implants. United States Department of Agriculture, June 2006. http://dx.doi.org/10.32747/2006.7695594.bard.

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In summary intensive studies carried out this year in both the US and Israel had established the methodology necessary for the achievement of the specific aims of the original proposal. Two complementary approaches to effectively neutralize the luteal ET- system were developed. In light of recent publications indicating that ET-2 might also have a physiological role in ovulation, the objectives of the original proposal have even more significant. Not only were the technologies to neutralize the luteal endothelin system developed in these studies, but additional important implications about the role of ET-1 were revealed. For example, direct early inhibitory effects of PGF2α were unmasked. It is possible that these early direct inhibitory effects could be related to functional aspects of luteal regression, while the effects observed after 12 hours of the PGF2α injection and that reversed by the ET receptor antagonist, could coincide with structural aspects of regression. Nevertheless, overall, the results clearly indicate that serum progesterone concentrations can effectively be elevated by the receptor antagonist which of great practical importance.
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Hart, Carl R., and Gregory W. Lyons. A Measurement System for the Study of Nonlinear Propagation Through Arrays of Scatterers. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38621.

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Various experimental challenges exist in measuring the spatial and temporal field of a nonlinear acoustic pulse propagating through an array of scatterers. Probe interference and undesirable high-frequency response plague typical approaches with acoustic microphones, which are also limited to resolving the pressure field at a single position. Measurements made with optical methods do not have such drawbacks, and schlieren measurements are particularly well suited to measuring both the spatial and temporal evolution of nonlinear pulse propagation in an array of scatterers. Herein, a measurement system is described based on a z-type schlieren setup, which is suitable for measuring axisymmetric phenomena and visualizing weak shock propagation. In order to reduce directivity and initiate nearly spherically-symmetric propagation, laser induced breakdown serves as the source for the nonlinear pulse. A key component of the schlieren system is a standard schliere, which allows quantitative schlieren measurements to be performed. Sizing of the standard schliere is aided by generating estimates of the expected light refraction from the nonlinear pulse, by way of the forward Abel transform. Finally, considerations for experimental sequencing, image capture, and a reconfigurable rod array designed to minimize spurious wave interactions are specified. 15.
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Shahak, Yosepha, and Donald R. Ort. Physiological Bases for Impaired Photosynthetic Performance of Chilling-Sensitive Fruit Trees. United States Department of Agriculture, May 2001. http://dx.doi.org/10.32747/2001.7575278.bard.

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Chilling-sensitivity is an important agricultural problem in both the U.S. and Israel. Most research attention has focused so far on herbaceous crop plants, even though the problem is also acute in the fruit tree industry. Under BARD funding we made substantial progress in identifying the mechanisms involved in the disruption of photosynthesis following a chill in mango. Our investigation with fruit trees has been substantially accelerated by drawing on our knowledge and experience with herbaceous crops. The four original research objectives, focused or discovering the underlying mechanisms of chill-induced inhibition of photosynthesis in fruit trees, and the main achievements are listed below. [1] Separating stomatal from non-stomatal components of chilling on photosynthesis in fruit trees. We found evidence that the dark chill-induced inhibition of photosynthesis in mango was E combination of both stomatal and mesophyll components. [2] Differentiating photo damage from light-induced photo protection of photosystem II (PSII). Dark chilling exacerbate high light photoinhibition, as a result of primary inhibition in the carbor reduction cycle. Nevertheless, in Israeli orchards we observed chronic photoinhibition of PSII photochemistry in the winter. This photo damage was reversible over a few days if sunlight was attenuated with filters or night temperature rose. Practical implications of this finding deserve further investment. Additional achievement was the development of a new biophysical tool to study macro-structural changes of LHCII particles in intact, attached leaves. [3] Determine the role of oxidative stress in the dark-chilling-induced inhibition, with emphasis on oxygen radical scavenging, lipid peroxidation and redox-controlled carbon-cycle enzymes. We found an increase in lipid peroxidation following a dark chill, and partial protective effects or an antioxidant. However, the photoinhibition observed in mango orchards in Israel during the winter did not appear to be a general oxidative stress. [4] Investigate whether chilling interferes with the diurnal and circadian rhythm of gene expression of key photosynthetic proteins as has been shown for chilling-sensitive crop plants. The results indicated that most of the circadian rhythm in photosynthesis was due to reduced lea: internal CO2 concentrations during the subjective night, as a result of rhythmic stomatal closure Chilling-induced interference with circadian timing in mango, does not play the central role in chilling inhibition of photosynthesis that has previously been demonstrated in certain chilling sensitive herbaceous plants. Practical implications of the research achievements are feasible, but require few more years of research.
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Habib, Ayman, Darcy M. Bullock, Yi-Chun Lin, Raja Manish, and Radhika Ravi. Field Test Bed for Evaluating Embedded Vehicle Sensors with Indiana Companies. Purdue University, 2023. http://dx.doi.org/10.5703/1288284317385.

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With the advent of modern sensing technology, mapping products have begun to achieve an unprecedented precision of measurement. Considering their diverse use cases, several factors play a role in what would make the resulting measurements accurate. For light detection and ranging (LiDAR) and photogrammetry-based mapping solutions that implement vehicles outfitted with laser ranging devices, RGB cameras, and global navigation satellite system/inertial navigation system (GNSS/INS) georeferencing units, the quality of the derived mapping products is governed by the combined accuracy of the various sensors. While ranging errors associated with LiDAR systems or the imaging quality of RGB cameras are sensor-dependent and are mostly constant, the accuracy of a georeferencing unit depends on a variety of extrinsic factors, including but not limited to, availability of clear line-of-path to GNSS satellites and presence of radio interferences. The quality of the GNSS signal, in turn, is affected by the grade of hardware components used and, to a great extent, obstructions to signal reception. This document reports some of the major challenges of vehicle-based mobile mapping with regards to GNSS/INS navigation. The background of GNSS/INS positioning is discussed to build a framework for trajectory enhancement as well as improvement of LiDAR mapping products. The focus is put on using available sensor data from LiDAR and/or cameras to enhance their position/orientation quality. Some best practices in light of potential trajectory deterioration are also recommended.
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