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 18 of 18 for “"Interferograms"”.
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Synthetic aperture radar image simulator for interferometry
… geometrical coherence factor, absolute phase, interferograms and flattened interferograms.
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Digital Holographic Microscopy for Measurement of Cellular Refractive Indices
… In order to find the index, the DHM records interferograms which quantitatively measures laser light's change in phase as it traverses the cells. These interferograms are then processed to reveal the cell's refractive index and height. The theory and design for the DHM will be presented along …
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Computation tools for the Fourier transform infrared (FT-IR) spectroscopic imaging
… a K-SVD dictionary to sparsely represent the interferograms. Then, using optimization algorithms, we recover the full dimensional interferograms from very few measurements. Using experimental results on the standard United States Air Force (USAF) 1951 target and breast tissue samples, we show …
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Instrument Trade Studies for Satellite Remote Sensing of Ammonia
… model of the instrument is used to generate interferograms for each pixel, average four neighbouring interferograms, and recover a spectrum. A secondary model convolves the theoretical instrument lineshape for an off-axis square pixel with the high-resolution radiance. The Rodgers-based …
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Simultaneous Immersion Mirau Interferometry
… creation and spatial separation of two interferograms, which, combined with the background image, are used to reconstruct the intensity map of the specimen. Giving the name Simultaneous Immersion Mirau Interferometry to this approach, simultaneous acquisition of all interferograms per …
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Holographic determination of mechanical properties and behaviour of materials
… the rod with a pendulum. From the pulsed laser interferograms obtained, the distance travelled by the wave in a known time could be measured and thereby the velocity (v) could be calculated. Experimental results indicate that it is feasible fo use holographic interferometry when dynamically …
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Neural Networks For Phase Demodulation In Optical Interferometry
… which obtains the OPL by acquiring multiple interferograms at different, evenly spaced wavenumbers. Traditional phase demodulation algorithms for WSI fail to reach the theoretical OPL sensitivity limit set by the CRB. We have designed NNs which are capable of achieving this bound across a …
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A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses
… of deformation patterns. The holographic interferograms were interpreted in a qualitative rather than a quantitative manner. The models do not exactly represent the in-vivo situation. Since this study identified high stresses both in the hip bone as well as in the interface …
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Quantitative anisotropy imaging with polarized interference microscopy
… interference microscopy system that captures interferograms bearing sample's linear birefringence information. To extract the retardance and the orientation angle maps from a single-shot measurement, we have further developed a mathematical model for QPIM. Our QPIM system has been validated by …
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Influence of Induced natural convection on laser propagation : analysis and interferometric visualization
… using a Mach-Zehnder interferometer. The interferograms are analyzed using both the Fourier methods and phase shifting. Both predict the change in refractive index near the beam to be of the same order of magnitude as the simulation results.
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Photoluminescence Study of Defects in Mercury Cadmium Telluride
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-12T20:59:11Z No. of bitstreams: 1 Furstenberg_Robert.pdf: 3021685 bytes, checksum: 9b448a1e45eb387f0bf81d018a5a9ff9 (MD5)
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Crustal deformation source monitoring using advanced InSAR time series and time dependent inverse modeling
… dependent model inversion approaches. Almost any interferograms include areas where the signal decorrelates and is distorted by atmospheric delay. In this thesis I detail new analysis methods to reduce the limitations of conventional InSAR, by combining the benefits of advanced InSAR methods such …
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Atmospheric water vapour tomography for DInSAR application and effect of volcanic plume on the microwaves
… have noticeable importance to calibrate the SAR interferograms and to establish the effective ground deformation of the volcanic edifice. In this study we presented a method to obtain a 3D electromagnetic waves velocity tomography, starting from the GPS output data analysis. Thanks to the …
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Photon Sources for Linear Optical Quantum Computing
… a variety of beats and oscillations in the interferograms. We develop a model to explain our results and conclude that controlling the phase between the two Ramsey interference pulses allows a degree of control over the state of the trapped spin. We then also demonstrate the coherent optical …
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SAR interferometry analysis of surface processes in the Pamir – Tien Shan active orogens - emphasis on coseismic deformation and landslides
… with millimeter surface change accuracy. 118 interferograms are analyzed to observe spatially-continuous movements with downslope velocities up to 71 mm/yr. The obtained rates indicate slow movement of the deep-seated landslides during the observation time. We correlated these movements with …
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Combining body wave tomography, surface wave inversion, seismic interferometry and laboratory measurements to characterize the black shales on Bornholm at different scales
… crosscorrelation signals to achieve the final interferograms. Due to the small scale of the interferometry even P-wave signals can be observed in the final crosscorrelations. In the laboratory measurements the seismic body waves were recorded for different pressure and temperature stages. …
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Deriving high resolution 3D information using multibaseline airborne SAR interferometry
… phase estimation method is introduced, where interferograms generated using the shorter baselines are only used to help unwrap the interferogram generated using the longest available baseline. A maximum likelihood (ML) phase estimation method was also investigated, taking into account …
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Categorization of electromagnetic radiation scatterers by means of synthetic aperture radar (SAR) images
… from classic Interferometry in order to produce interferograms from which the topographic contribution has been eliminated. Even so, DInSAR inherits many difficulties of InSAR with the main being the temporal and spatial decorrelation. However, single pixels that are coherent over long time …