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 899 for “"aperture"”.
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Aperture
In the beginning God created the world. Waste and void, waste and void. And darkness was upon the face of the deep. And when there were men, in their various ways, they struggled in torment towards God. Blindly and vainly, for man is a vain thing, and man without God is a seed upon the wind: driven …
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Synthetic aperture microscopy
… us.finally to break those rules. Our "Synthetic Aperture Microscope" floods a large region with a richly complex, finely structured pattern of light-the interference pattern of a ring of n coherent sources. A target within the volume of the interference fluoresces (or scatters or transmits) an …
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Exploring scatterer anisotrophy in synthetic aperture radar via sub-aperture analysis
… the case for highresolution wide-band and wide-aperture data where model deviations are even more pronounced. If ignored, these deviations will reduce recognition performance due to the model mismatch, but when appropriately accounted for, these deviations from the ideal point scattering model …
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Interferometric Synthetic Aperture Microscopy
… optical microscopy, Interferometric Synthetic Aperture Microscopy (ISAM), is introduced to account for the scattering effects. Comprehensive models for interferometric microscopy, such as optical coherence tomography (OCT) are developed, for which forward, adjoint, normal, and inverse operators …
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Synthesis of Aperture Antennas
Made available in DSpace on 2014-12-04T21:02:43Z (GMT). No. of bitstreams: 1 0010495.pdf: 5614468 bytes, checksum: a322fa88aa78fc84a75417f6b17dd25d (MD5) Previous issue date: 1954
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Interferometric Synthetic Aperture Microscopy (ISAM) Reconstruction and Characterization in a High Numerical Aperture System
… scattering properties. Interferometric synthetic aperture microscopy (ISAM) is a newer technique that can overcome the typical dependence between lateral resolution and depth-of-focus of an optical coherence tomography (OCT) imaging system by offering spatially invariant resolution within the …
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Doppler-only synthetic aperture radar
SAR has traditionally been performed using high-range resolution data. This thesis is a proof-of-concept that the imaging process can be performed using high-doppler resolution data. The system requires a simple continuous wave transmitter, and the signal returns are confined to a narrow band. …
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Scaled Synthetic Aperture Rader Development
… Cal Poly thesis projects involve synthetic aperture radar (SAR), automatic target recognition (ATR), and tracking. SAR data was either accessed from a publicly available database or generated using complex computer modeling software. The motivation for this dual thesis project is to design …
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Multifocal interferometric synthetic aperture microscopy
We extend interferometric synthetic aperture microscopy (ISAM) to optical coherence tomography (OCT) data collected with multiple positions of the focal plane. Multifocal ISAM achieves spatially invariant resolution like ISAM by applying the solution of the inverse problem to the forward model for …
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Switched aperture surface current measurements
… work, a general theory referred to as a switched aperture surface current measurement is developed that directly obtains unperturbed electric surface current measurements, provided certain conditions on the measurement apparatus are met. The most stringent of these are the requirement for a …
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Multi-channel coded-aperture photography
This thesis describes the multi-channel coded-aperture photography, a modified camera system that can extract an all-focus image of the scene along with a depth estimate over the scene. The modification consists of inserting a set of patterned color filters into the aperture of the camera lens. …
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Two-Sensor Synthetic Aperture Geolocation Techniques
… to two airborne sensors by applying a synthetic aperture technique. By fusing together data from multiple subsequent time samples, one can boost the overall resolution of the geolocation estimate. We propose using a series of geolocation measurements collected between two sensors according to a …
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Software simulation of synthetic aperture radar
The purpose of this report is to set out the results of the development of SAR simulation software. The aim of the thesis was to develop such software so that it provides the necessary functionality but is still flexible and simple to use. It addition it must be developed such that it may be …
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Array processing methods for calibrating Inverse Synthetic Aperture Radar and Multiple Pass Synthetic Aperture Radar / by Zhishun She.
… calibration for errors of a synthetic aperture in Inverse Synthetic Aperture Radar and Multiple Pass Synthetic Aperture Radar. Both are reviewed as the problems of array processing and are solved from the point of array calibration.
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Modeling aperture radiation for RF interference applications
… effectiveness of a metallic enclosure with apertures on top wall by formulating a pair of coupled mixed potential integral equations (MPIEs). Application of Ewald transform to the computation of Green's function in the cavity yields fast convergence of series summation. Good agreements with …
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A Rotating Aperture Mask for Small Telescopes
… star surveys. Masks placed at the telescope aperture promise to augment the resolving power of telescopes of all sizes, but many of these masks must be manually and repetitively reoriented about the optical axis to achieve their full benefits. This paper introduces a design concept for a mask …
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