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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

REAL-TIME TWO-WAVELENGTH HOLOGRAPHIC INTERFEROMETRY WITH A BISMUTH-SILICON OXIDE CRYSTAL.

LAM, SIN-SANG. January 1984 (has links)
The Bismuth Silicon Oxide (BSO) single crystal can be obtained both in a large size and with good optical quality. It has been demonstrated that the BSO (Bi₁₂SiO₂₀) crystal is a practical holographic recording medium. BSO is a semiconductor and has a large electro-optic coefficient. These two properties of the BSO crystal are responsible for its capability to record. In this study, the linear and circular birefringence of the BSO crystal under an electric field were investigated. The measurement method is by passing a linearly polarized wavefield through the crystal. The transmitted wavefield is written in parametric expressions using Jones calculus, and the wavefield is probed by a simple ellipsometer. The two parameters in the Jones matrix, the linear and circular birefringence, are solved from the experimental data. The electro-optic coefficient is determined from the resulting linear birefringence to be 3.57 x 10⁻¹⁰ cm/V at λ = 632.8 nm. The diffraction efficiency and temporal response of the BSO crystal in the transverse electro-optic configuration were studied. The crystal was then coated with a single layer antireflection coating to investigate the effect of a multi-reflections inside the crystal. The result showed that although the visibility improved only about 20%, the diffraction efficiency and temporal response improved two times. The BSO crystal is used as the recording medium in a two-wavelength holographic interferometer. An optical edge filter is used in the interferometer to adjust the beam ratio, and a prism is used to incorporate tilt in the interferometer and to deviate the two wavelengths to satisfy the Bragg's condition for the volume hologram. The 488 and 514.5 nm lines of an argon-ion laser are used to give an equivalent wavelength of 9.45 μm. The interferograms obtained are of high contrast.
2

Holography Measurement of Solute Concentration Ahead of Solidification Front

Lin, Yung-Chang 16 August 2006 (has links)
This study is focus on solute concentration ahead of solidification front and base on holographic method by using holographic interferometry. Heterogeneous nucleation of bubbles on an advancing solidification front during freezing of water containing a dissolved gas has been experimentally and analytically studied. The formation of bubbles resulting from supersaturation of liquids is commonly encountered in different fields such as heat transfer, manufacturing, and bioscience.
3

On the applicability of holographic interferometry to assess J-integral and C.O.D. fracture criteria

Achard, Louis-Marie. January 1982 (has links)
No description available.
4

A study of optical and opto-electronic techniques for nondestructive testing

Wang, Jianmin January 1992 (has links)
No description available.
5

An interferometric method for evaluating holographic materials /

Sumner, Roger C. January 1990 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 1990. / Typescript. Includes bibliographical references (leaves [73-74]).
6

Reconstruction of three-dimensional temperature field from interferometric data

Darenfed, Salah. January 1984 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1984. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 153-156).
7

Measurement of mass transfer from a simulated fuel particle by the method of holographic interferometry

Nomura, Keiko Katrina. January 1983 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 119-121).
8

Fabrication of photonic quasicrystals using holographic lithography method /

Xu, Jun. January 2007 (has links)
Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2007. / Includes bibliographical references (leaves 119-133). Also available in electronic version.
9

On the applicability of holographic interferometry to assess J-integral and C.O.D. fracture criteria

Achard, Louis-Marie January 1982 (has links)
No description available.
10

Holographic interferometry applications in elastic-plastic fracture mechanics

Carmel, Yves. January 1981 (has links)
No description available.

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