由微波技术发展而来的激光技术,是最近十多年发展起来的一门尖端科学。它有传统光源缺少的一系列优越性,在国防建设、工农业生产和科学实验各方面都有广泛的用途。全息照相作为一种特殊的摄影方法,几十年前就有人作过研究,但由于缺乏适当的光源,一直停留在萌芽阶段。激光问世以后,全息照相得到迅速发展,为工业生产和科学实验提供了有力武器。下面简单介绍一下激光、全息照相的基本原理及其在无损检验中的应用。 The development of laser technology from microwave technology is a cutting-edge science developed in the recent decade. It has a series of advantages that the traditional light source lacks and has a wide range of uses in various fields such as national defense construction, industrial and agricultural production and scientific experiments. Holographic photography, as a special photography method, was researched decades ago, but has remained in its infancy as a result of the lack of a suitable light source. After the advent of the laser, holographic photography developed rapidly, providing a powerful weapon for industrial production and scientific experiments. The following briefly describes the laser, the basic principle of holography and its application in non-destructive testing.