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 6 of 6 for “"ray trajectories"”.
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Ray analysis of tapered graded-index planar waveguides and fibers
… (three-dimensional) geometries are considered. A ray optics approach is used in the analysis, assuming that the characteristic dimensions of tapered waveguides are small compared to the wavelength of light. Closed form analytical solutions are obtained for ray trajectories in tapers with small …
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Application of ray acoustics to the propagation of sound in ducts containing sheared flows
Ray acoustics has been applied to the propagation of sound waves in a homogeneous moving medium with sheared flow bounded by the hard walls of a duct. Differential equations describing the ray trajectories and spreading losses along each ray were developed and solved numerically for a range of …
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A wave-kinetic numerical method for the propagation of optical waves
… ( WDF ) is conserved along the conventional ray trajectories, and, thus, by discretizing the input WDF with Gaussian beamlets, we can represent the output WDF as a sum of Gaussians, from which irradiance can be obtained by analytical integration of each Gaussian with respect to wavevector. …
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Statistical Modeling of Wave Chaotic Transport and Tunneling
… properties of waves in cavities in which ray trajectories that are regular and chaotic coexist (i.e., `mixed' systems). The impedance can be written as a summation over eigenmodes where the eigenmodes can typically be classified as either regular or chaotic. By appropriate …
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Water Wave Refraction with Non-Linear Theory
… employing several different topographies. Wave trajectories obtained from this model, when obtained by using first and third order wave theory with and without the consideration of energy dissipation, show considerable differences. These differences are examined in more detail for a bottom of …
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Ray Tracing Confirms the Optical Properties of the Bovine Lens Are Actively Maintained by the Microcirculation System
… this hypothesis, I have developed a novel laser ray tracing (LRT) system that allows the optical properties of isolated bovine lenses maintained in organ culture to be measured. A fully automated LRT system capable of passing multiple rays at different projection angles through bovine lenses …