纯水的激光反射率的研究  

Research on Laser Reflection Index of Water

作　　者：刘薇[1,2] 张涛[1] 

机构地区：[1]北京师范大学核科学与技术学院射线束技术与材料改性教育部重点实验室,北京100875 [2]北京市辐射中心,北京100875

出　　处：《光学与光电技术》2010年第1期84-86,共3页Optics & Optoelectronic Technology

基　　金：北京市科技新星计划(952870400);教育部优秀青年教师基金资助项目

摘　　要：以纯水为研究对象,利用激光测量了其反射率,并利用菲涅耳公式对反射率进行了计算。比较反射率的计算值和实测值发现有明显的偏离(偏离相对值为8.317%)。对此进行了误差分析,排除这种偏离是主要由试验和计算误差引起的可能性(这些误差累积不会超过1.083%)。利用带消光系数的反射率菲涅耳公式进行修正计算,反射率计算结果与实测值很接近。说明并非只有金属等物质在进行反射率计算时需考虑能量吸收的问题,对于完全符合菲涅尔公式适用条件的纯水来说,在进行反射率计算时同样需引入修正系数。The reflection index R of water is measured with laser. The calculated reflection index Rp of water is obtained with the Fresnel formula. The relative deviation between R and Rp is 8. 317%. Analysis indicates that the sum of the experimen tal error and the calculation error is less than 1. 083%. So this deviation is not mainly caused by the experimental and calculation errors. The Fresnel formula with extinction coefficient is used to calculate the reflection index of water, and the calculated value is very close to the experimental value. It is concluded that the reflection index of water should be calculated with the revised Fresnel formula.

关 键 词：反射率 反射率计算 菲涅耳公式 消光系数 

分 类 号：O431.1[机械工程—光学工程]