浮法玻璃作为镀膜产品的基片,分析其光学常数是进行产品光学设计及质量控制的基础.由于反射光无法完全体现材料吸收特征、玻璃两个界面的多次反射光产生退偏问题,使利用椭偏原理分析浮法玻璃光学常数存在局限性.本文利用分光光度计测量浮法玻璃300~2500 nm范围透射光谱,根据光谱特征,建立以高斯振子及极振子为核心的复合振子模型,共15个未知参数,利用遗传算法依据透射光谱数据分析获得最佳振子参数,得到相应的光学常数,符合浮法玻璃基本光学特性.
The optical constant of float glass is the basis of optical design and quality control of the coated product.Because the reflected light can not reflect the material absorption characteristics,as well as the multiple reflection of the glass two interface to generate the depolarization problem,to make use of ellipsometry to analyze the optical constants of float glass is not applicable.In this paper,by using the spectrophotometer to measure the transmission spectrum 300-2500 nm range of float glass,based on the spectral characteristics,a composite oscillator model with the core of gaussian and pole oscillators was established,a total of 15 unknown parameters,using genetic algorithm to obtain the optimum oscillator parameters according to the transmission spectrum,the corresponding optical constants were obtained,which were in accordance with the basic optical properties of float glass.
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