一、前言全息照相是六十年代发展起来的一种新技术,是激光的一种重要应用。这种照相技术有很多独特的优点,因此近年来被广泛的应用于无損检驗。目前美国、日本、西德等国家已經把激光全息照相技术应用到金属部件,蜂窝結构,橡胶輪胎等生产检驗中去。近几年来国內也有很多单位广泛的开展了这方面的科学研究,如北京303所、621所、沈阳112厂、 I. Introduction Holography is a new technology developed in the 1960s and an important application of laser. This photographic technique has many unique advantages and therefore has been widely used in nondestructive testing in recent years. At present, the United States, Japan, West Germany and other countries have applied laser holographic technology to metal parts, honeycomb structures, rubber tires and other production tests. In recent years, many units in China have carried out extensive scientific research in this area, for example, 303 in Beijing, 621 in Shenyang, 112 in Shenyang,