Firstly , as an important optical thin film , it has the many good properties of high transparence in visible region , high refractive index , high chemical stability , high strength and high degree of hardness , which applied widely to anti - reflection coatings , interference filters , electrochromism windows and thin film optical waveguides 作為光學(xué)膜, tio _ 2薄膜在可見光區(qū)透射率高,折射率大,化學(xué)穩(wěn)定性高、強(qiáng)度大、硬度高,是非常重要的光學(xué)膜,已被廣泛地應(yīng)用于抗反射涂層、干涉濾波片、電致變色窗和薄膜光波導(dǎo)。