Mr. Guang-Cai Huang Profile

Guang-Cai Huang

at Shanghai Univ

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Proceedings Article | 10 October 2020 Presentation + Paper

Simulation analysis of digital acousto-optic holography for internal structural inspection

Wen-Jing Zhou, Guang-Cai Huang, Hong-Bo Zhang, Ying-Jie Yu, Ting-Chung Poon

Proceedings Volume 11551, 115510J (2020) https://doi.org/10.1117/12.2574021

KEYWORDS: Digital holography, Holography, Acousto-optics, Optical simulations, Inspection, Ultrasonography, Finite element methods, Computer simulations, Acoustics, Associative arrays

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We have investigated the internal structure of materials by use of a digital acousto-optic holographic technique. The innovative technique is effective in detecting the internal structure information of functional gradient materials. The present visible-light-source-based digital holographic techniques are not able to detect the internal structure information of non-transparent objects and that motivates us to seek the ultrasound-based digital optical holography alternative. The characteristic model of functional gradient materials is modeled through finite element modeling software. The effects of material composition, shape and density on the ultrasound field distribution are simulated, which reveal the propagation pattern of the ultrasound in functional gradient materials as the shape, density and elastic modulus of the medium affect the acoustic properties. The dynamic changes of quantitative mapping relationship between the internal structural information and the sound field is also analyzed. Results indicate that the change is correlated with the internal structural information of the object. The simulation results provide useful quantifiable information for the subsequent research of digital acousto-optic holography to detect the internal structure of materials. Our research is applicable to various industrial problems where traditional digital holographic techniques alone fail to deliver solutions.

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