A simple method for imaging ultrasonic fields in clear media is introduced. A modulated laser source is used to project the ultrasonic field onto a CCD camera. By use of the source-synchronized lock-in detection scheme, 2D images of the amplitude and phase distributions can be determined simultaneously. This technique is experimentally demonstrated with a 1-MHz and a 3.5-MHz ultrasonic transducer operated in continuous-wave mode. This method is very straightforward to implement and can be combined with the traditional tomographic reconstruction technique to obtain the 3D distribution of an ultrasonic field.
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August 27 1999
Full-field mapping of ultrasonic field by light-source-synchronized projection
J. Acoust. Soc. Am. 106, L36–L40 (1999)
Gang Yao, Lihong V. Wang; Full-field mapping of ultrasonic field by light-source-synchronized projection. J. Acoust. Soc. Am. 1 October 1999; 106 (4): L36–L40. https://doi.org/10.1121/1.427892
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