一、前言利用激光全息照相拍摄叶片振型的工作在国内外正广泛被运用。国内已有很多单位(1)(2)(3)(7)做了试验研究工作,取得不少成果,这种方法具有很大的优越性,但也有下述缺点,需用相干光源来实现再现观测。再现时有显著的斑纹噪声。就近来美国维恩大学扬振环教授等首创了一步彩虹全息技术(4),采用这 First, the preface The use of laser holographic photography blade vibration mode work is widely used at home and abroad. Many domestic units (1) (2) (3) (7) have done a lot of research and experimental work, this method has great advantages, but also has the following shortcomings, the need to use coherent light source to achieve Reproduce the observation. Reproduction of significant markings noise. Recently, the United States Wien University Professor Yang Zhenhuan pioneered a step by step rainbow holography (4), using this