Francon interference ocular

例句：

1. 1. The researcher found that the Francon interference ocular could be used to detect the presence of a virus in a sample.
   研究人员发现，弗朗康干涉眼可以用来检测样本中是否存在病毒。
2. 2. The Francon interference ocular was used to analyze the chemical composition of the sample.
   弗朗康干涉眼被用来分析样品的化学成分。
3. 3. The Francon interference ocular was used to study the behavior of particles in a fluid.
   弗朗康干涉眼被用来研究流体中粒子的行为。