Among them, the novel common-path heterodyne interferometric system, which is built with a pair of quarter waveplates to improve the measurement sensitivity, is my original design.

• 其中改良式外差干涉术，为我们最新提出的量测方式，是在共光程外差干涉仪中，加入两个四分之一波片，藉此增加我们量测折射率的灵敏度。