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 “"Optical Speckle"”.
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Ageing Assessment of Power Transformer Kraft Paper Insulation Using Optical Speckle
… a potentially fast, simple, and inexpensive optical setup based on optical speckle is the main subject of this thesis. Speckle interference patterns from a laser diode source have been captured by a CCD camera. Classification based on textural features shows very good discrimination between …
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Measurements of Surface Displacements During Stress Wave Propagation in Opaque Solids Using Pulsed Laser Speckle Photography
… of combining a pulsed ruby laser source and an optical speckle photography recording scheme. The set-up is capable of measuring surface displacements due to stress waves and propagating cracks in solids. A double exposure recording allows the comparison of object points to be made between two …
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Transport and disorder-induced localization of ultracold Fermi gases
… and dynamics of ultracold fermions in speckle and optical lattice potentials to explore Anderson localization, many-body localization, and relaxation dynamics in strongly correlated systems. Anderson localization is probed by releasing non-interacting, spin-polarized gases into three …
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Fluctuations and state preparation in quantum degenerate gases of sodium and lithium
… fluctuations that employs an effect analogous to optical speckle, using it to characterize the pair correlations in a strongly attractive Fermi gas. Finally, we use the methods we have developed to characterize the magnetic correlations of a Fermi gas with strong repulsive interactions on the …
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Fractality and topology of optical singularities
Optical singularities are points in complex scalar and vector fields where a property of the field becomes undefined (singular). In complex scalar fields these are phase singularities and in vector fields they are polarisation singularities. In the former the phase of the field is singular and in …
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Phasing of Ground-based Optical Arrays for Space Applications
Delivery of optical power to targets in space has many applications, including optical communication, active sensing, laser propulsion, and the removal of space debris. However, large monolithic optics required to obtain high directivity are costly and difficult to slew at the rates required to …