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 9 of 9 for “"optic axis"”.
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Rectangular Waveguide Filled with Uniaxial Medium and Negative Resistance Enhanced Composite Right/Left-Handed Transmission Line
… uniaxial medium. Different orientations of the optic axis of the uniaxial medium are considered and the wave transmission and modal behaviors are investigated. When the optic axis is aligned with one of the coordinate axes, i. e., x, y, or z axis, the method of wave decomposition with respect to …
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Analysis of Waveguides Filled with Uniaxial Media and Metamaterials for Filter Applications using the Mode Matching Method
… uniaxial media with special orientations of the optic axis, because in practice the coordinate systems of media and waveguide do not always coincide. The Mode Matching Method with rotated optic axis is also extended to include the losses of the dielectric. This thesis also goes on to demonstrate …
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Fast Response Liquid Crystal Devices
… for displays, spatial light modulators, variable optical attenuators (VOAs) and other tunable photonic devices. The response time of these devices is mainly determined by the employed liquid crystal material. How to obtain fast response for the LC devices is a fundamentally important and …
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STED-4Pi Microscopy
… They reveal a resolution of 50 nm along the optic axis. Finally, a further implementation of an additional STED beam for lateral resolution enhancement is demonstrated. In future, this will enable simultaneous superresolution of at least 100 nm in the lateral and 50 nm in the axial direction.
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Transient electromagnetic scattering by a radially uniaxial dielectric sphere: Debye series, Mie series and ray tracing methods
… waves in terms of the incident angle, optic axis and propagation direction. The results indicate a satisfactory agreement between Debye series , Mie series and ray tracing methods.</p>
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Quantum Imaging of Biosamples
All far-field optical imaging is limited by diffraction from optical elements, a phenomenon called Rayleigh's curse. It has been shown that through the use of the spatial mode demultiplexing technique (SPADE), an arbitrarily small separation between two point sources can be resolved, given a …
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The Flexoelectro-optic Effect for Photonics Applications
… of research carried out into the flexoelectro-optic effect, as observed in chiral nematic liquid crystals, and its potential for application in fibre optic communications components. The flexoelectro-optic effect provides a mechanism of fast, analogue rotation of the optic axis in chiral …
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Generic camera calibration for omnifocus imaging, depth estimation and a train monitoring system
… scene. In this dissertation, we propose new optically and physically motivated models for achieving state-of-the-art geometric and photometric camera calibration. The calibration parameters are then applied as input to new algorithms in omnifocus imaging, 3D scene depth from focus and machine …
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Modeling the properties of silicates
… improved. Like EXCALIBR, EXCALIBR II solves optical extinction data, as determined with a spindle stage, and determines the optic axial angle 2V and the orientation of the crystal’s optical indicatrix. EXCALIBR II uses a modification to Joel’s equation as a means of obtaining the optic axes …