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Dissertation/Thesis Abstract

Computational and design methods for advanced imaging
by Birch, Gabriel C., Ph.D., The University of Arizona, 2012, 184; 3523949
Abstract (Summary)

This dissertation merges the optical design and computational aspects of imaging systems to create novel devices that solve engineering problems in optical science and attempts to expand the solution space available to the optical designer. This dissertation is divided into two parts: the first discusses a new active illumination depth sensing modality, while the second part discusses a passive illumination system called plenoptic, or lightfield, imaging.

The new depth sensing modality introduced in part one is called depth through controlled aberration. This technique illuminates a target with a known, aberrated projected pattern and takes an image using a traditional, unmodified imaging system. Knowing how the added aberration in the projected pattern changes as a function of depth, we are able to quantitatively determine depth of a series of points from the camera. A major advantage this method permits is the ability for illumination and imaging axes to be coincident.

Plenoptic cameras capture both spatial and angular data simultaneously. This dissertation present a new set of parameters that permit the design and comparison of plenoptic devices outside the traditionally published plenoptic 1.0 and plenoptic 2.0 configurations. Additionally, a series of engineering advancements are presented, including full system raytraces of raw plenoptic images, Zernike compression techniques of raw image files, and non-uniform lenslet arrays to compensate for plenoptic system aberrations. Finally, a new snapshot imaging spectrometer is proposed based off the plenoptic configuration.

Indexing (document details)
Advisor: Tyo, J. Scott
Commitee: Ashok, Amit, Schwiegerling, Jim
School: The University of Arizona
Department: Optical Sciences
School Location: United States -- Arizona
Source: DAI-B 74/01(E), Dissertation Abstracts International
Subjects: Optics
Keywords: Advanced imaging, Endoscopy, Non-uniform lenslet array, Plenoptic, Snapshot spectrometer, Three-d imaging
Publication Number: 3523949
ISBN: 978-1-267-57799-3
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