一、前言超声波全息照相是一种新的显象法,它能定量地检查物体中的缺陷,也就是能确定缺陷的位置、大小和形状,这是一般的A扫描脉冲反射法超声波探伤所办不到的。另外,这种方法不仅能检查形状规则的零部件,而且能检查各种复杂形状的零部件,如钢锭、大的铸锻件和高压容器等,这是X射线工业电视等其它定量的检查法所作不到的。这种方法的另一个优 I. INTRODUCTION Ultrasonic holography is a new visualization method that can quantitatively check for defects in an object, that is, the location, size and shape of a defect, which is what a general A-scan pulse reflection ultrasonic flaw detection does Not enough. In addition, this method can not only inspect parts with regular shapes, but also inspect parts of complex shapes such as steel ingots, large castings and forgings and high-pressure vessels, etc., by other quantitative tests such as X-ray industrial television Not enough. Another advantage of this approach