Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Rayleigh-Sommerfeld"”.
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Fast estimation model of pressure-temperature response for planning focused ultrasound surgery
… planning, a numerical simulation model, known as Rayleigh-Sommerfeld method, is used. As the Rayleigh-Sommerfeld method is applicable only with homogenous media, a modified computation method that can deal with scattering and refractions from multiple tissue layers is developed to simulate the …
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Analysis of Fabry-Pérot laser resonators stabilized by microlenses and applications in speckle-free imaging
… standard Gaussian optics as well as numerical Rayleigh-Sommerfeld diffraction results. It was found that the beams are generally uncoupled in this arrangement, and therefore do not produce interference. The resulting emission from large arrays of lasers has a moderate degree of coherence. …
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Sparse signal representation based algorithms with application to ultrasonic array imaging
… propagation effect using Huygens principle and Rayleigh-Sommerfeld diffraction formula. We then use this model to develop a sparse signal representation based imaging technique for a test sample immersed in water. Moreover, we develop a new sparse Bayesian technique. In the model that we …
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Diffraction-based Optical Architectures for Processing One-dimensional Data
… in terms of Hankel functions, including the Rayleigh-Sommerfeld diffraction formulae, Fresnel and Fraunhofer approximations, and angular spectrum formulations, with the Fourier relationships between various formulations elucidated. Results are expanded further to extend the range of …
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Integrated full vectorial FEM, FDTD and diffraction integrals in characterising visible light propagation through lossy biological media
… the Diffraction profiles have been obtained by Rayleigh-Sommerfeld(RS) diffraction integral.
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Numerical Reconstruction and Applications of Acoustic and Electromagnetic Ultra-Wideband Localized Pulses Generated by Dynamic Aperture Antennas
… techniques are based on Huygens and Rayleigh-Sommerfeld integral I and II representations, both in the time and frequency domains. In contradistinction to the Weyl representation,they lend themselves to the physical realization of space-time aperture sources capable of generating …
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The diffraction of monsters from complex apertures
… formulation is developed that is based on Rayleigh-Sommerfeld diffractionintegrals, and the scattered waves are connected more directly to Maxwell’s equations in terms of calculating the corresponding magnetic-field components. Finally, the first steps are taken toward modelling a physical …
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On the parallels between the Maxwell and Dirac equations
… for the quantum wave equations, and the Rayleigh--Sommerfeld diffraction integral---an alternative formalism for the optical wave equation. We apply the idea developed in the diffraction theory to establish the path integral for the Schr\"{o}dinger equation---a generalized Helmholtz …