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据瑞士刊《精密技术》1972年报道,一个英国制造公司已生产出一种Optel型全息照相干涉度量系统。这种系统可进行象0.5个光波长那样小的机械位移定量分析,而且可将此值插补到10分之一的数值。此系统适用于很多方面的静态和动态测量。它现正用于航空工业的透平转子叶片的检查。 Optel型全息照相干涉仪包括一个气体激光器和一个由分光器、滤光片组成的光学系统,其中分光器将激光束分成两束光束。一束是参考光束,另一束照在被测物体上,并在全息底片上形成干涉条纹。当通过显影后的底片
According to the Swiss journal Precision Technology, 1972, a British manufacturing company has produced an Optel-based holographic interference measurement system. This system allows as little as 0.5 optical wavelength mechanical displacement quantitative analysis, and this value can be interpolated to a tenth of the value. This system is suitable for many aspects of static and dynamic measurement. It is now being used for inspection of turbine rotor blades in the aviation industry. The Optel-type holographic interferometer consists of a gas laser and an optical system consisting of a beam splitter and a filter, wherein the beam splitter divides the laser beam into two beams. One is the reference beam and the other is on the object under test and forms an interference fringe on the holographic film. After passing through the developed film