Practical High Resolution Acoustic Microscopy
This paper describes recent progress towards the development of a practical 100 MHz acoustic microscope whose principle of operation is based upon optically measuring the localized dynamic displacements of a boundary caused by an incident angular spectrum of sound waves.1 The applicability of this technique was first suggested in Vol. 3 of this series2 where, in addition, several other possible methods of acoustic microscopy were compared. The term “acoustic microscopy”, while not new, has traditionally referred to the visualization of detail in the millimeter range of acoustic wavelengths. The present use of this term denotes imaging detail in the micron range.
KeywordsCritical Angle Acoustic Impedance Fuse Quartz Acoustic Image Knife Edge
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