V(Z) of the surface acoustic wave focusing system

Date
1986-11
Advisor
Instructor
Source Title
IEEE 1986 Ultrasonics Symposium
Print ISSN
Electronic ISSN
Publisher
IEEE
Volume
Issue
Pages
727 - 730
Language
English
Type
Conference Paper
Journal Title
Journal ISSN
Volume Title
Abstract

It is possible to define a V(Z) function for the surface acoustic wave (SAW) focusing system for a class of reflectors similar to that defined in acoustic microscopy. In this case V(Z) is a function which relates the transducer output voltage to the distance between the focal point and the reflection line. It is possible to express V(Z) in an analytical expression using angular spectrum techniques. V(Z) is measured for straight edge reflectors forming various angles with the surface. V(2) of straight step reflectors are investigated. These curves show a dependence on the type of reflector. The experiments are performed at 1.5 MHz in conjunction with a computerized data acquisition system. The phase information is also recorded in all these measurements in addition to the amplitude. It is possible to get an inversion of V(Z) to get the SAW reflection coefficient at a straight discontinuity.

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Keywords
Surface acoustic waves, Acoustic waves, Reflection, Surface waves, Aluminum, Fourier transforms, Mirrors, Pulse measurements, Geometry, Equations
Citation
Published Version (Please cite this version)