简要介绍了激光超声技术以及声表面波的基本特点、激光超声产生和接收的基本原理及激光超声技术的应用。概述了聚偏二氟乙烯(PVDF)压电薄膜材料的结构、性质和应用，以及薄膜压电性产生的机理。对PVDF换能器的设计思路和实验方法进行了简单讨论。具体实验采用脉冲激光器激发声表面波，利用PVDF传感器接收实验信号，调试实验信号，得出波形，并对实验现象作出初步分析。证实了该实验装置应用于激光超声无损检测的可行性与可靠性。

The features of laser ultrasonic technique and its surface acoustical wave are introduced. The principle of laser ultrasonic generation and reception as well as the application of laser ultrasonic technology are presented. The structure,properties and applications of polyvinylidene fluoride (PVDF) piezoelectric film are briefly described. The design concept and experiment methods of the PVDF transducer are discussed. With the experimental setup,the surface acoustic waves generated by pulse laser were received by the PVDF transducer. The signals generated in experiment were analyzed. The results show that this setup is reliable and can be used as a nondestructive detection solution.