Thesis (M. Phil.)--University of Hong Kong, 1996. / Includes bibliographical references.

This thesis provides an analysis of an acoustic imaging technique using holography and the interaction of acoustic and light waves at a liquid-gas interface. Real time optical images of objects that have been transilluminated with ultrasonic waves in a liquid medium can be obtained. The liquid surface acts as a detector of the ultrasonic energy. When coherent light is reflected off the liquid surface an optical image of the object is obtained. An analysis is presented of the mechanisms involved including an analysis of the transient motion of the liquid surface. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

Holographic interferometry offers tremendous potential in the analysis of small amplitude vibrations of three dimensional objects. Due to stability requirements and the necessity of a coherent light source, the analysis is still limited to the laboratory. In this experiment the various holography systems for vibration analysis developed to date were investigated. Secondly, a real time holographic interferometry technique was developed for quantitatively mapping the complete dynamic field of a surface, where the amplitudes of vibration are on the order of the wavelength of light used. This technique offers the following features: (a) The phase of the object can be determined. (b) The exact resonant frequency can be pinpointed by observing the phase change of the vibrating object (c) Entire displacement fields can be determined, even though the maximum amplitudes of vibrations are on the order of only a few microinches. (d) Under continuous illumination the mode shape of the object can be readily observed. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate

No description available.

No description available.

No description available.

No description available.

Thesis (M.S.)--University of Michigan, 1969.

Thesis (M.S.)--University of Michigan, 1969.

Approved for public release; distribution is unlimited / An investigation into the behavior of aluminized solid propellant combustion in a two-dimensional windowed rocket motor was conducted using holographic techniques. Holograms were recorded in the motor port, aft of the propellant grain and at the entrance to the exhaust nozzle for two different propellant compositions at varying operating pressures. Quantitative particle size data for particles larger than 20 microns were obtained from the holograms. From these data, the mean diameters (D32) of the larger particles were calculated and utilized to compare what effects pressure, location in the motor and aluminum content had on the behavior of the aluminum/aluminum oxide particles. D 32 was found to decrease with increasing pressure, but was unaffected by variations in low values of propellant aluminum loading. D 32 at the grain exit was found to be significantly less than within the grain port. / http://archive.org/details/holographicinves00butl / Lieutenant, United States Navy