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阐述了对高速运动过程用激光干涉方法连续测速时，多普勒频移与被测运动物体运动速度之间的关系和对激光照明光源的主要技术性能要求。以ＪＳＧ－２型点测速仪为例，说明了它的组成、记录信号特点及最终速度信息的处理方法。介绍了具有二维和一维空间分辨的面、线成象激光干涉测速仪及光纤传输测速仪研制和应用的最新进展。
The relationship between the Doppler frequency shift and the moving speed of the measured moving object and the main technical performance requirements of the laser illumination light source are expounded when the laser speed measurement method is used to measure the speed continuously. Taking JSG-2 point velocity anemometer as an example, its composition, signal characteristics and final velocity information processing method are described. The latest development and application of surface and line imaging laser interferometer and optical fiber transmission velocimeter with two-dimensional and one-dimensional spatial resolution are introduced.