Location

Williamsburg, VA

Start Date

1-1-1986 12:00 AM

Description

When an ultrasonic beam refracts through a liquid-solid interface, two physical processes limit the degree of energy concentration that can be realized by focussing techniques. Diffraction prevents energy from being concentrated into a region with transverse dimension of much less than a wavelength. However, even if the wavelength is made arbitrarily small, unlimited energy concentrations cannot be realized because of aberrations caused by the fact that all focussed rays do not pass through a common point.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

5A

Chapter

Chapter 1: Conventional Methodologies

Section

Ultrasonics

Pages

117-125

DOI

10.1007/978-1-4615-7763-8_12

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

A Model for the Effects of Aberrations on Refracted Ultrasonic Fields

Williamsburg, VA

When an ultrasonic beam refracts through a liquid-solid interface, two physical processes limit the degree of energy concentration that can be realized by focussing techniques. Diffraction prevents energy from being concentrated into a region with transverse dimension of much less than a wavelength. However, even if the wavelength is made arbitrarily small, unlimited energy concentrations cannot be realized because of aberrations caused by the fact that all focussed rays do not pass through a common point.