Thomas W. Shield

Research output: Contribution to journalConference articlepeer-review


The design of an acoustic lens that reduces spreading and controls the power from an ultrasonic transducer is given. A ray theory for acoustics, analogous to that in optics, is reviewed. This allows geometrical analysis to be used to design a lens to control diffraction spreading from a piston source. A ray model for the piston source is given. Layers of different materials are used to reduce the reflection at the interfaces. A numerical simulation is carried out to show that the complete lens system, under the approximations made, concentrates the radiation in a specified focal region.

Original languageEnglish (US)
Pages (from-to)3. 1-3. 21
JournalT.&A.M. Report (University of Illinois at Urbana - Champaign, Department of Theoretical and Applied Mechanics)
StatePublished - 1983


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