Measurement of ultrasound field pressure with laser Doppler vibrometer

Tao Xu; Ruixiang Lu; Huaping Chen; Yingchun Zhou

doi:10.1117/12.783173

17 January 2008 Measurement of ultrasound field pressure with laser Doppler vibrometer

Tao Xu, Ruixiang Lu, Huaping Chen, Yingchun Zhou

Proceedings Volume 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 67231C (2008) https://doi.org/10.1117/12.783173
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

In this paper an optical method for measurement of the sound field pressure is presented. A laser homemade vibrometer is used to measure change of optical path length caused by ultrasound field. With this method it is possible to obtain the data of sound field pressure. The laser phase is recorded after it has passed through the sound filed. Through mathematical derivation the laser phase of arbitrary slice of the sound field can be retrieved. The retrieved result is used for digital image reconstruction of the ultrasound field. A 500μm diameter needle hydrophone is used to measure threedimensional spatial distribution of ultrasound filed pressure with the propagation of time series and the result is compared with that obtained from experiment with optical method. The related pressure amplitude show excellent agreement with the results of comparison. It is shown that this optical measurement technique makes possible a very accurate quantitative determination of ultrasound field pressure.

Citation Download Citation

Tao Xu, Ruixiang Lu, Huaping Chen, and Yingchun Zhou "Measurement of ultrasound field pressure with laser Doppler vibrometer", Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67231C (17 January 2008); https://doi.org/10.1117/12.783173

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