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 20 of 565 for “"interferometry"”.
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Multiple transducer synthetic aperture sonar interferometry for emulating SAR interferometry
… transducer single-pass synthetic aperture sonar interferometry in air is a technique that can emulate topographic mapping techniques that have not been implemented using radar or that are relatively expensive and difficult to obtain in practice for the radar engineer who wishes to test algorithms …
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Simultaneous Immersion Mirau Interferometry
… endstations must use epi-illumination. Mirau Interferometry is an epi-illumination, non-stain imaging modality suitable for implementation at a microbeam endstation. To facilitate interferometry and to maintain cell viability, it is desirable that cells stay in cell growth medium during the …
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Moiré interferometry at high temperatures
… high temperature by using high-sensitivity moiré interferometry. This was achieved by a new approach of performing deformation measurements at high temperatures in a vacuum oven using an achromatic interferometer. The moiré system setup was designed with particular consideration for the stability, …
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Adaptive Optics for Stellar Interferometry
… The application of Adaptive Optics in Stellar Interferometry will then consider these results to achieve the final goal: reduced losses in fringe visibility and increased sensitivity. The thesis is organised with the second chapter discussing the theory of seeing phase aberrations; their origin …
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Astronomical Interferometry at Submillimetre Wavelengths
This thesis describes my work on the project to connect the James Clerk Maxwell Telescope (JCMT) and the Caltech Submillimeter Observatory (CSO) to form the world's first astronomical interferometer operating at submillimetre wavelengths. Included are my contributions to the technical design and …
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Disconnected interferometry at 81.5 MHz
Long Baseline Interferometry is a well established technique that enables high angular resolution measurements to be made with a radio interferometer containing independent local oscillators and signal recorders. This Thesis addresses the problems encountered when this technique is applied to low …
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Precision selenodesy via radio interferometry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1979.
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Coherent control of neutron interferometry
… path separation. Third, we propose a new interferometry geometry that reduces the sensitivity of the neutron interferometer to environmental vibrational disturbances. The method is based on a quantum error compensating algorithm. Finally, a new method that is capable of measuring the …
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Broadband nanosensing using heterodyne interferometry
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Optical pattern comparison by interferometry
By placing two similar input transparencies adjacent to each other in the same plane, and illuminating them with coherent light, it is possible to create parallel fringes that will modulate the composite Fraunhofer diffraction pattern of the two input objects. The power spectrum of the combined …
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STRUCTURAL INFLUENCES ON INTENSITY INTERFEROMETRY CORRELATION
… images of distant objects called Intensity Interferometry (II), which is less sensitive to atmospheric distortions and aberrations of telescope surfaces. The deficiencies of II are overcome as photo detectors become more sensitive and computers more powerful. In recognition of this …
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Bayesian Estimation for White Light Interferometry
… of height maps from scanning white light interferometry is presented. This method unifies the conventional steps of pre- and postprocessing within Bayesian inference. An adept formulation of the prior allows for the exact computation of the height estimate, obviating the need for …
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Stellar interferometry - detectors and the atmosphere.
… wider range of applications than just stellar interferometry as replacements for the commonly used photomultiplier tubes, e.g. in telescope autoguiding and photometry. Atmospheric seeing is of crucial importance to the performance of stellar interferometers and large telescopes. Specifically, …
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High-Frame-Rate Oil Film Interferometry
<h1><a></a></h1> <p>High-Frame-Rate Oil Film Interferometry</p> <p>Jonathan Charles White</p> <p>This thesis presents the design and implementation of a high-frame-rate oil film interferometry technique (HOFI) used to directly measure skin friction in time dependent flows. Experiments were …
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Accurate image reconstruction in radio interferometry
… is concerned with accurate imaging from radio interferometry data and with subsequent analysis so as to determine source positions and fluxes in the radio sky. The thesis makes proposals and implementations of new algorithms, which substantially improve the accuracy of image products and the …
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Coherent control of polarized neutron interferometry
… characterization using polarized neutron interferometry (NI). We describe a split path spin-based interferometer geometry that uses the Bragg interferometer to separate two paths where spin states are independently manipulated. The final measurement is made on the spin degree of freedom, …
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Atmospheric propagation effects on radio interferometry
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1986.
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Laser metrology system for stellar interferometry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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Chemical Detection and Sensing Using Optical Interferometry
Chemical detection, including analysis of gases and liquids, is a large field in environmental research and industry. It requires sensitive, rapid, and inexpensive chemical sensors. Many industrial materials such as coatings and adhesives readily absorb chemical analytes, which may result in …
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