Research on Acoustical Scattering, Diffraction Catastrophes, Optics of Bubbles, Photoacoustics, and Acoustical Phase Conjugation
Abstract
The research summarized concerns several aspects of the propagation and scattering of acoustical and optical waves. The topics discussed fall under the following five categories: A. Acoustical scattering theory and experiments(focused backscattering from spherical and hemispherical shells in water, Lamb waves, forward scattering from shells, acoustical glory, and resonances); B. Diffraction catastrophes and other directional caustics (shapes of wavefronts which produce transverse cusp and hyberbolic-umbilic diffraction catastrophes, calculation of caustic parameters, surfaces of negative Gaussian curvature, and a novel expression for the virtual source location). C. Light scattering from real bubbles in water (optical backscattering from freely rising bubbles in water, the unfolded glory of an oblate bubble, optical effects of adsorbed films); D. Production of sound by a bubble or drop in water illuminated by modulated light (bubbles as a novel photoacoustic source, sound radiated by dyed illuminated oil drop in water); E. Acoustical phase conjugation (comments on the theory of various methods of acoustical phase conjugation, note on the focal shift of a frequency shifted beam from a pseudo-phase-conjugator).
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 27, 1986
- Accession Number
- ADA174401
Entities
People
- Philip L Marston
Organizations
- Washington State University