激光法布里-珀罗干涉仪(简称F-P干涉仪),是70年代后期发展起来的新型仪器。它采用了激光、F-P干涉仪和变象管电子摄象机三项新技术。它利用从运动目标反射光的多普勒效应,将其波长的变化转换为P-F干涉仪环纹位置的变化,因而能连续地记录运动目标的速度-时间曲线。图象直观,测速范围广,精度高,抗干扰能力强,目前受到各国的广泛重视。据近几年的文献报导法国、美国都建立了类似的测速装置。本文着重阐明测速原理,精度分析及该仪器的应用。在测速原理部分,给出激光从运动目标 Laser Fabry-Perot Interferometer (F-P Interferometer) is a new instrument developed in the late 1970s. It uses three new technologies, lasers, F-P interferometers and image tube electronic cameras. It uses the Doppler effect of the reflected light from the moving target to convert the change of its wavelength into the change of the ring position of the P-F interferometer so that the velocity-time curve of the moving target can be continuously recorded. Intuitive images, a wide range of speed, high precision, anti-interference ability, now widely valued by all countries. According to the literature in recent years, France and the United States have all established similar speed measuring devices. This article highlights the principle of speed measurement, accuracy analysis and the application of the instrument. In the principle part of the speed measurement, given the laser from the moving target