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前言:自从66年Foremen等根据多普勒效应研制了第一台激光多普勒流速计并以原始参考光束与散射频移光束进行光外差获的讯号的理论予以解释以来,激光流速计的研制工作有了很大进展。69年,Rudd根据干涉理论从另一观点出发,进一步发展了激光流速计的理论,并且使激光流速计的结构大为简化。根据这一理论设计的流速计71年已做为商品样机在展览会上展出。目前它正处在脱离实验室开始进入工业应用的过度阶段。现将此方面的新进展简述如下:
Forename: Since Foremen et al. (66) developed the first laser Doppler anemometer based on the Doppler effect and interpreted the theory of the signal obtained by heterodyning the original reference beam and the scattered-shifted beam, the Great progress has been made in research and development. In the 69th year, Rudd further developed the theory of the laser velocity meter from another point of view based on the interference theory and greatly simplified the structure of the laser velocity meter. According to the theory of the design of the 71-year flowmeter has been shown as a prototype of the product at the exhibition. It is now at an undue stage of getting out of the lab and getting into industrial applications. The new progress in this respect is summarized as follows: