Photoacoustic (PA) imaging has been widely used in biomedical research and preclinical studies during the past two decades. It has also been explored for nondestructive testing and evaluation (NDT/E) and for industrial applications. This paper describes the basic principles of PA technology for NDT/E and its applications in recent years. PA technology for NDT/E includes the use of a modulated continuous-wave laser and a pulsed laser for PA wave excitation, PA-generated ultrasonic waves, and all-optical PA wave excitation and detection. PA technology for NDT/E has demonstrated broad applications, including the imaging of railway cracks and defects, the imaging of Li metal batteries, the measurements of the porosity and Young’s modulus, the detection of defects and damage in silicon wafers, and a visualization of underdrawings in paintings.

中文翻译：

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回顾用于无损检测和评估的光声成像和传感的最新进展

在过去的二十年中，光声 (PA) 成像已广泛用于生物医学研究和临床前研究。它还被用于无损检测和评估 (NDT/E) 以及工业应用。本文介绍了用于无损检测/检测的 PA 技术的基本原理及其近年来的应用。NDT/E 的 PA 技术包括使用调制连续波激光器和脉冲激光器进行 PA 波激发、PA 产生的超声波以及全光 PA 波激发和检测。用于 NDT/E 的 PA 技术已经展示了广泛的应用，包括铁路裂缝和缺陷的成像、锂金属电池的成像、孔隙率和杨氏模量的测量、硅晶片中的缺陷和损坏的检测以及可视化绘画中的底图。