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.
Results
Showing 1 to 9 of 9 for “"optical modelling"”.
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Quasi-Optical Modelling of Telescope Systems for Planck and STEAMR
… is concerned with the high-frequency quasi-optical modelling of telescope systems, with special attention paid to the Planck satellite, but further work is also performed on the Stratosphere-Troposphere Exchange And climate Monitor Radiome- ter (STEAMR) and the Far Infrared Instrument …
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Wavefront modelling and sensing for advanced gravitational wave detectors
… was subsequently followed up by observations by optical and radio astronomers — the first time an astrophysical event was observed by two completely separate astrophysical signals. This marked the beginning of multi-messenger astronomy. Since then 90 astrophysical events have been observed using …
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Fundamental investigations on periodic nano- and microstructured organic solar cells
… This approach is investigated in this thesis by optical modelling and experiments. Optical modelling is performed by rigorous coupled wave analysis (RCWA) in order to calculate an optimum grating geometry and to gain a better understanding of the light absorption in the device. Diffraction …
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Design and Analysis of the Optical Beam Combiner and Corrugated Feed Horns for the QUBIC Instrument
… Argentina. This thesis describes the detailed optical analysis of the QUBIC instrument and, in particular, its quasi-optical beam combiner. Two variations of QUBIC are analysed: the full instrument (FI) and a technological demonstrator (TD). It was decided to develop the smaller optical …
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Modelling high peak-power solid-state lasers
… development costs through the use of numerical modelling techniques. This is achieved through leverage of existing modelling software, MATLAB and Zemax, and development of custom integrations, greatly enhancing their current capabilities.;This thesis is comprised of three distinct research …
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Resolving oxidation phenomena in layered semiconductors and scaled heterogeneous integration for low-power electronics
… complex dielectric function (ε), enabling optical modelling of multi-layer heterostructures. Combined with the various modes of SIE operation, it has the potential to unlock fast, high-throughput, large-area capability to better understand material stability and oxidation mechanisms, as …
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The interplay between order and disorder in cholesteric hydroxypropyl cellulose films
… appearance. The aim of this thesis is to develop modelling methods for characterising the interplay between order and disorder in polydomain cholesteric films. First, an open-source Python toolkit (PyLlama) was developed to model the optical response of arbitrary multilayer stacks, and applied to …
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Ray Tracing Confirms the Optical Properties of the Bovine Lens Are Actively Maintained by the Microcirculation System
… Magnetic Resonance Imaging (MRI) modalities and optical modelling software the Molecular Vision Laboratory (MVL) has shown that the lens geometry and the gradient of refractive index (GRIN), which together determine the optical properties of the ocular lens, are actively maintained by the lens …
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Visual Performance in Pseudophakia. The Effect of Meridional Blur in Pseudoaccommodation.
… ocular characteristics were not. Ray tracing modelling using wavefront data was a moderate predictor of VA and reading acuity. The results of the effect of meridional blur orientation on alphabets other than the Roman alphabet, suggest that visual performance is dependent on the interaction …