会聚光全反射法测量物质折射率

使用会聚光从折射率已知的光学材料中入射并聚焦到该光学材料与待测的物质的分界面上，测量反射光强度或反射率的空间分布，根据全反射原理可计算出待测物质的折射率，这是一种简便且易于用计算机控制和自动采集并处理数据的方法，适用于微小样品的各种材料（包括生物组织体）的折射率性质的研究。

Using tile Focused Light to Determine the Refractive Index of Materials by Total Internal Reflection

A method based on total internal reflection is presented for determining the refractive index of materials. A focused light and a semicylindrical lens in contact with materials areused in the experimental apparatus. The dependence of the internal reflective intensity or reflectivity of the angle of incidence is measured by a photondetector. The critical angle and thereforethe refractive index can be obtained from the spacial distribution of internal reflective light. Thesimple method is of controling easily by computer and is applied to many areas relative to the refractive index.