目前所用的激光无损检验技术,都需要大型隔振光学系统,因而这种检测复合材料如蜂窝状和泡沫状飞机复合材料(结构中的层次、气孔,裂纹和其它结构缺陷)的好方法仅能在有限的条件下进行。现已研 The current methods of laser NDT require large vibration-isolating optical systems and therefore this good method of testing composites such as honeycomb and foam-like aircraft composites (gradations, pores, cracks and other structural defects in the structure) can only Under limited conditions. Now research