Full Field Visualization of Surface and Bulk Acoustic Waves Using Heterodyne Holographic Interferometry
Annual summary rept. 1 Oct 1987-30 Sep 1988
JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF MATERIALS SCIENCE AND ENGINEERING
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The objective of this research has been to apply optical holographic techniques coupled with electronic signal and image processing to provide quantitative, full field measurements of acoustic wave disturbances. Building on work performed previously at Johns Hopkins and in its second year under the current contract to the Office of Naval Research, this program has sought to establish the limits of sensitivity with which surface acoustic waves might be measured and mapped. Toward this end, the effects film resolution on overall sensitivity have been examined. Also, significant efforts have taken place to extend heterodyne holographic measurements to the examination of acoustic energy flow in optically transparent bulk materials.
- Acoustooptic and Optoacoustic Devices