带侧键的硅氧烷高分子薄膜，在吸收有机分子时它的厚度会发生膨胀，其膨胀幅度与接触的有机物浓度成正比；采用白光干涉测厚的方法可测量出薄膜厚度的微小变化，从而构成一种灵敏的化学一光学传感器。本文介绍了这一新技术及对甲苯，二氯乙烷，三氯乙烷的测量结果。 Silicone macromolecule films with side bonds will expand in thickness when they absorb organic molecules, and their expansion amplitude is proportional to the concentration of organic compounds in contact. Small changes in film thickness can be measured by white light interferometry, Thus forming a sensitive chemical-optical sensor. This article describes the new technology and the measurement results for toluene, dichloroethane and trichloroethane.