基于光电技术的玻璃折射率测量  

Measuring refractive index of optical glass based on photo-electric technology

作　　者：纪小辉[1] 陈彤[1] 

机构地区：[1]西安工业大学光电工程学院,陕西西安710032

出　　处：《应用光学》2010年第5期777-780,共4页Journal of Applied Optics

摘　　要：折射率是玻璃的重要光学性能之一,其测量方法很多。为了准确、快速、适应性好地测量玻璃折射率,提出一种基于光电技术的新测量方法。利用平行平板玻璃对入射光线的侧向偏移特性,可以得到不同折射率的玻璃对光线的不同偏折程度来确定折射率和偏移量之间的关系式,并通过采用位置敏感探测器将光斑像点的位移转化为电信号的输出,从而实现折射率转化为电信号。设计了光学系统和信号处理单元,通过实验测得了K9玻璃的折射率,并与最小偏向角法测量折射率进行对比,测量数据表明该方法可行,测量精度可达到10-4,可以满足测量高精度玻璃折射率的要求。Refractive index is an important parameter for optical glass and there are many methods to measure the refractive index of optical glass.In order to measure refractive index accurately and quickly,a new method is introduced to measure refractive index of optical glass based on photoelectric technology.Optical flat has the feature of deviating incident ray,we can get the function of the offset distance and the refractive index,and the displacement fluctuation of light spot image is converted to electric signal outputting by a position sensitive detector.We designed an optical system and a signal detecting and processing circuit,measured the refractive index of K9 glass,and compared the results with the data measured by the method of minimum angle of deviation.The result proves this method is feasible,the accuracy of refractive index reaches 10-4,and it can be used to measure the refractive index of glass with high accuracy demand.

关 键 词：玻璃折射率测量 平行平板玻璃 位置敏感探测器 信号处理 

分 类 号：TN29[电子电信—物理电子学] TH741.4[机械工程—光学工程]