扩展光源的时间和空间相干性效应分析

在干涉仪不同支路臂中分别加入透明光学层，将扩展光源入射到迈克尔逊干涉仪，观察光场的时间和空间相干现象，发现2种情况下出射光的时间和空间相干包络极值位置发生错位现象。论证了不同支路臂中的光学层可破坏干涉场中的光波相干特性，从而导致时间和空间相干性出现超前或滞后的空间位置互易效应。利用该效应，在2个入射光源条件下，可以得到一种测量光学样品的几何厚度和折射率的实验途径，并给出了相关的计算公式。

Commutation effects on time-coherence and space-coherence of extended lights

Michelson interferometer experiment for extended lights was performed. When the extended light was incident upon the Michelson interferometer, and the transparent optical layers were added into each interferential arm, the dislocation phenomena of the peak of the time and space coherent envelop for exit light was observed under two conditions. It is proved that the optical wave coherent characteristic in the interference field can be destroyed by adding optical layers in the different interferential arm, which results in lead or lag for the time and the spatial coherence. Based on this effect, the measurement of the thickness and refractive index of optical elements can be implemented experimentally with two incident beams. The relevant calculation formulas are given.