10

Optical visualization of acoustic fields: the schlieren technique, the Fresnel method and the photoelastic method applied to ultrasonic transducers

K. Yamamoto,     Kansai University, Japan

Abstract:

This chapter discusses three types of optical visualization techniques for evaluating the acoustic field transmitted from ultrasonic transducers: the schlieren technique, the Fresnel method and the photoelastic method. We begin with a review of the physical mechanism of the acousto-optic interaction used in visualization techniques, and then discuss the experimental apparatus and the observed images.

Key words

schlieren technique

Raman–Nath diffraction

Bragg reflection

Fresnel diffraction

photoelasticity

10.1 Introduction

The optical visualization ...

Get Ultrasonic Transducers now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.