多通道综合全息术及在材料性能检测中的应用研究

The multichannel synthetic holography and its application in material performance detection

自激光问世以来,应运而生的激光全息干涉计量术得到迅速发展,应用于许多领域。文中提出并实现了干涉条纹载波法一时间平均多通道综合全息术,这种技术综合应用了多种全息术并用光路通道转换器调制平面参考光波实现多通道全息图记录,再现时可同时观察所有通道的原始像。文中给出了多通道综合全息术有关的理论分析和在材料性能检测中的应用实例,给出了温度变化对叶片试件振动影响的实测结果,这一研究对叶片的设计优化具有实用意义。

Since laser came forth at the sixtieth year of 20 century, rapid developments have taken place in the holographic interferometory which is widely used in many fields. This paper described and realized the multiehannel synthetic holography of the carrier fringes and time - average method which applied various kinds of holographic interferometry synthetically and realized the multichannel holograms recordation by the way of plane reference waves modulated by the channel converting system of light path. All the primary images can be watched simultaneously when they reappeared. This paper presented the theoretical analyses of the multiehannel synthetic holography and its application example in material performance detection, and put forward the experiment results of blade vibrancy effeeted by variety of temperature. The research has the practical signification for design and optimization of the blade.