Exotic Ultrasonics for the real world

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Introduction

The project was to investigate ways to make high frequency ultrasonic measurements more practical and applicable to real world applications.

As part of this project we have developed a custom CMOS linear array detector for picosecond ultrasound measurements. We have used the detector for spectroscopy and imaging. The linear array camera has a very large photon capacity to allow it to reach high signal to noise rations to enable us to see the tiny signals present in our experiments. The cameras can be locked to a wide range of modulation frequencies. This new detector allows imaging of the sample properties, such as coating thickness, over large areas where previously only point measurements were feasible.