Two-Dimensional Analytic Modeling Of Acoustic Diffraction For Ultrasonic Beam Steering By Phased Array Transducers

Keywords

Acousto-optic; Phased array transducer; Photo-acoustics; Ultrasonic beam steering

Abstract

Phased array ultrasonic transducers enable modulating the focal position of the acoustic waves, and this capability is utilized in many applications, such as medical imaging and non-destructive testing. This type of transducers also provides a mechanism to generate tilted wavefronts in acousto-optic deflectors to deflect laser beams for high precision advanced laser material processing. In this paper, a theoretical model is presented for the diffraction of ultrasonic waves emitted by several phased array transducers into an acousto-optic medium such as TeO2 crystal. A simple analytic expression is obtained for the distribution of the ultrasonic displacement field in the crystal. The model prediction is found to be in good agreement with the results of a numerical model that is based on a non-paraxial multi-Gaussian beam (NMGB) model.

Publication Date

4-1-2017

Publication Title

Ultrasonics

Volume

76

Number of Pages

35-43

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.ultras.2016.12.005

Socpus ID

85007496706 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85007496706

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