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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Diffractive optical elements for interconnections

Zhou, Zhiping James 12 1900 (has links)
No description available.
2

Studies on the decay and recovery of higher-order solitons, initiated by localized channel perturbations

Lee, Kwan-Seop. January 2004 (has links) (PDF)
Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004. / John A. Buck, Committee Chair ; Stephen E. Ralph, Committee Member ; Gee-Kung Chang, Committee Member ; Rick Trebino, Committee Member ; Glenn S. Smith, Committee Member. Includes bibliographical references (leaves 102-104).
3

Aspects of Fourier imaging : a thesis presented for the degree of Doctor of Philosophy, University of Canterbury, Christchurch, New Zealand /

Hsiao, Wen-Hsin. January 1900 (has links)
Thesis (Ph. D.)--University of Canterbury, 2008. / Typescript (photocopy). "May 2008." Includes bibliographical references (p. 157-165). Also available via the World Wide Web.
4

Comparison of the mid-frequency line edge noise algorithms of Jim Hamerly and Yigal Gur for best correlation to the psychophysical defect known as raggedness /

Huff, Kevin G. January 1987 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 1987. / Typescript. Includes bibliographical references (leaf 15).
5

Wavefront sensors in adaptive optics : a thesis presented for the degree of Doctor of Philosophy, University of Canterbury, Christchurch, New Zealand /

Chew, Theam Yong. January 1900 (has links)
Thesis (Ph. D.)--University of Canterbury, 2008. / Typescript (photocopy). "February 2008." Includes bibliographical references (p. 191-199). Also available via the World Wide Web.
6

Non-polarised edge filter design using genetic algorithm and its fabrication using electron beam evaporation deposition technique

Ejigu, Efrem Kebede 25 November 2013 (has links)
D.Phil. (Electrical & Electronic Engineering Science) / Recent advancement in optical fibre communications technology is partly due to the advancement of optical thin-film technology. The advancement of optical thin-film technology includes the development of new and existing deposition and optical filter design methods. Genetic algorithm is one of the new design methods that show promising results in designing a number of complicated design specifications. The research is entirely devoted to the investigation of the genetic algorithm design method in the design of producible polarised and non-polarised edge filters for optical fibre communication applications. In this study, a number of optical filter design methods such as Fourier Transform and refining are investigated for their potential in designing those kinds of structures. Owing to the serious limitations to which they are subject, they could not yield the kind of results anticipated. It is the finding of this study that the genetic algorithm design method, through its optimisation capability, can give reliable and producible designs. This design method, in this study, optimises the thickness of each layer to get to the best possible solution. Its capability and unavoidable limitations in designing polarised and non-polarised beam splitters, edge filters and reflectors from absorptive and dispersive materials are well demonstrated. It is observed that the optical behaviour of the non-polarised filters designed by this method show a similar trend: as the angle of incidence increases the inevitable increase in the percentage of polarisation, stop bandwidth and ripple intensity is well controlled to an acceptable level. In the case of polarised designs the S-polarised designs show a better response to the optimisation process than the P-polarised designs, but all of them are kept well within an acceptable level. It is also demonstrated that polarised and non-polarised designs from the genetic algorithm are producible with great success. This research has accomplished the task of formulating a computer program using genetic algorithm in a Mathlab® environment for the design of producible polarised and non-polarised filters from materials of absorptive and dispersive nature.
7

Fourier image synthesis and slope spectrum analysis of deepwater, wind-wave scenes viewed at Brewster's angle /

North, Jan Arthur. January 1989 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 1989. / Includes bibliographical references (leaves 139-147).
8

Fast circular aperture synthesis in sar all-aspect target imaging

Burki, Jehanzeb. January 2008 (has links)
Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Christopher F. Barnes; Committee Member: Andrew F. Peterson; Committee Member: Douglas B. Williams; Committee Member: Haomin Zhou; Committee Member: Justin K. Romberg. Part of the SMARTech Electronic Thesis and Dissertation Collection.
9

Quantitative acoustic microscopy of surfaces

Rowe, John M. January 1987 (has links)
No description available.
10

Optical pattern comparison by interferometry

Tenefrancia, Sandra L. January 1988 (has links)
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 inputs, i.e. test and reference signal Fourier transform, is analyzed for regularity of the fringe pattern. The method of interference used on input with small rotational errors and on relatively large displacements of the input does not affect the recognition capabilities of the system. This optical method is useful for making rapid pattern comparisons, where the signal to noise ratio is large. / Master of Science

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