Method for detecting microstructure of functionally graded material based on digital acousto-optic holography
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United States of America Patent
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Jun 27, 2023
Grant Date -
Apr 13, 2023
app pub date -
Dec 18, 2019
filing date -
Nov 21, 2019
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Abstract
The present invention discloses a method for detecting a microstructure of a functionally graded material based on digital acousto-optic holography, including the following steps: excite a sample with an ultrasonic wave; record a light wave; form a single tomographic acousto-optic hologram; perform numerical reconstruction of phase information, and perform global detection. The present invention uses an acoustic-optic modulation device to modulate a laser light source of a laser of a laser device to form two light waves of different frequencies. The two light waves each constitute a Mach-Zehnder interference system to record reflection wave information and transmission wave information of an ultrasound, and are finally combined and recorded in the same hologram to form the single tomographic acousto-optic hologram.
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