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 Imaging through ground-level turbulence by fourier telescopy: simulations and preliminary experiments.


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Type of Resource: text

Genre: Electronic Thesis or Dissertation

Date Created: Spring 2015

Date Issued: 2015

Publisher: Florida Atlantic University

Physical Form: Online Resource

Extent: 88 p.

Language(s): English

Summary: Fourier telescopy imaging is a recently-developed imaging method that relies on activestructured-light illumination of the object. Reflected/scattered light is measured by a large“light bucket” detector; processing of the detected signal yields the magnitude and phaseof spatial frequency components of the object reflectance or transmittance function. Aninverse Fourier transform results in the image.In 2012 a novel method, known as time-average Fourier telescopy (TAFT), wasintroduced by William T. Rhodes as a means for diffraction-limited imaging throughground-level atmospheric turbulence. This method, which can be applied to longhorizontal-path terrestrial imaging, addresses a need that is not solved by the adaptiveoptics methods being used in astronomical imaging.Field-experiment verification of the TAFT concept requires instrumentation that is notavailable at Florida Atlantic University. The objective of this doctoral research program is thus to demonstrate, in the absence of full-scale experimentation, the feasibility of time-average Fourier telescopy through (a) the design, construction, and testing of smallscale laboratory instrumentation capable of exploring basic Fourier telescopy datagathering operations, and (b) the development of MATLAB-based software capable ofdemonstrating the effect of kilometer-scale passage of laser beams through ground-levelturbulence in a numerical simulation of TAFT.

Identifier: FA00004401 (IID)

Note(s): Includes bibliography.Dissertation (Ph.D.)--Florida Atlantic University, 2015.

Subject(s): Fourier analysisFourier integral operatorsInterconnects (Integrated circuit technology)Remote sensingSpread spectrum communicationsWireless sensor networks

Held by: Florida Atlantic University Digital Library

Sublocation: Boca Raton, Fla.

Persistent Link to This Record: http://purl.flvc.org/fau/fd/FA00004401

Restrictions on Access: All rights reserved by the source institution

Owner Institution: FAU



Autor: Randunu-Pathirannehelage, Nishantha, author Rhodes, William T. Dr., Thesis advisor College of Engineering and Computer Science, D

Fuente: http://fau.digital.flvc.org/islandora/object/fau%3A31319



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