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 ...
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