Full field visualization of surface and bulk acoustic waves
Abstract
The objective was to apply optical holographic techniques coupled with electronic signal and image processing to provide quantitative, full field measurements of acoustic wave disturbances. High speed pulsed holographic methods were developed to permit visualization of transient acoustic wave fields on the surfaces of solids and plates. In addition, it was possible to produce tomographic displays of acoustic energy flow in optically transparent fluids and solids. Special adaptations for heterodyne analysis made it possible to extract data from the holographic interferograms with sensitivities 900 times greater than conventional visual analysis.
- Publication:
-
Johns Hopkins Univ. Final Report
- Pub Date:
- September 1990
- Bibcode:
- 1990jhu..rept.....W
- Keywords:
-
- Flow Visualization;
- Sound Fields;
- Sound Waves;
- Surface Waves;
- Wave Propagation;
- Display Devices;
- Heterodyning;
- High Resolution;
- Holographic Interferometry;
- Image Processing;
- Optical Communication;
- Tomography;
- Acoustics