一种新型薄腔法-珀干涉测速系统研究

本文所关注的激光干涉测速技术主要用于测试在冲击波或爆轰波作用下各种材料样品的自由面速度随时间变化的过程,介绍了基于光学谐振腔的选频特性利用薄腔法-珀干涉仪直接测量高速飞片所引起的多普勒频移从而获得其速度信息的设想,并根据此设想构建薄腔法-珀干涉测速系统的技术路线。最后描述了利用该项测试技术实际测量金属箔电爆炸驱动的Kapton膜飞片速度的实验并对实验结果进行了分析。与其它激光测速装置相比,该干涉仪具有体积小、结构简单紧凑和成本低的特点。

Study on the measurement of using new Fabry-Perot Thin cavity interferometer

Laser interferometry can measure the velocity histories of the reflected surface or the internal particles velocity histories of the materials under shock wave conditions. This paper discussed the basic theory and main principle of the laser interferometry; and presented a new method for measuring the velocity of the fast moving flyer based on the selected frequency character of the optical resonant cavity, and also presented the precision and ranges of this measuring method. At last, the velocity of the Kapton flyer was monitored by this technique. Compared with other laser interferometers, the newly developed thin cavity interferometer is compact, simple and low cost.