论文部分内容阅读
导言近十年来,我们研究所使用差分干涉仪(D.I.)观测流动过程(图1).由石英晶体制的双棱镜(渥拉斯顿棱镜)将每股光线分成两束,这两束光以微小的间距2e 透过试验段,在底片上它们再度相遇.这样产生的干涉现象(条纹移动)是衡量这两束光程差的尺度.
Introduction In the last decade, our institute used a differential interferometer (DI) to observe the flow (Figure 1). A bipolar prism (Wollaston prism) made of quartz crystal divides the light per strand into two beams Tiny spaces 2e pass through the test section where they re-meet, and the resulting interference (fringe movement) is a measure of the optical path difference between these two beams.