玻璃中球形气泡远场干涉条纹强度的数值分析  

Numerical Analysis of Far-Field Interferometric Fringe Intensity of Spheric Bubble in Glass

作　　者：肖长江[1,2] 魏勇[1,2] 张景超[1] 

机构地区：[1]燕山大学理学院,河北秦皇岛066004 [2]燕山大学里仁学院,河北秦皇岛066004

出　　处：《光学与光电技术》2016年第1期74-78,共5页Optics & Optoelectronic Technology

基　　金：秦皇岛市科学技术研究与发展计划(201101A072);燕山大学里仁学院教改(jg201404)资助项目

摘　　要：气泡是常见的玻璃缺陷,远场干涉法可直接测量玻璃厚度方向的气泡尺寸,为了给测量时观察角的选择提供理论依据,基于几何光学原理和菲涅尔公式,建立了光束的远场干涉模型并导出干涉条纹的相对光强计算公式。以冕牌玻璃(K6)、重冕玻璃(ZK6)、重火石玻璃(ZF6)为例,通过数值分析,得到干涉条纹的相对光强分布规律:相对光强幅度随折射率的增大而增大;全局来看,相对光强幅度随偏向角的增大呈先增大后减小的趋势,其变化不具有周期性;局部来看,相对光强幅值、条纹角间距近似相等,其变化具有近似周期性,且条纹的可见度较高。Bubbles are common defects in glass.The bubble size in the thickness direction can be directly measured by the far-field interferometric method.In order to provide theoretical evidence for the selection of measurement observation angle,based on geometrical optical principle and Fresnel＇s formula,the beam far-field interference model is set up and the fringe relative intensity formula are deduced.Taking crown glass（K6）,heveay crown glass（ZK6）,dense flint glass（ZF6）for example,regularities of distribution of the fringe relative intensity are derived by the numerical analysis.It shows that the amplitude of the relative intensity increases with the increase of the refractive index.As a whole,the amplitude of the relative intensity is enhanced first and then weakened by the increase of the deviation angle,and it is not periodic.In part,the amplitude and fringe angle spacing of the relative intensity is approximately equal and periodic and the visibility of fringe is higher.

关 键 词：物理光学 相对光强 数值分析 玻璃气泡 远场干涉 

分 类 号：O435.1[机械工程—光学工程]