用磁致旋光效应估测二维磁场分布  

Estimation of two-dimensional magnetic field distribution by the effect of magneto-optic rotation

作　　者：王益军[1] 严诚[2] 李小俊[3] 

机构地区：[1]咸阳师范学院物理系,陕西咸阳712000 [2]北方夜视技术股份有限公司,陕西西安710100 [3]西北大学光子学与光子技术研究所,陕西西安710069

出　　处：《大学物理》2008年第5期28-32,共5页College Physics

基　　金：咸阳师范学院科研基金资助项目(06XSYK255)

摘　　要：为了克服现有测量磁场方法只能单点测量的局限性,基于法拉第磁光效应原理,提出利用磁致旋光估测磁场的方法,提高了磁场测量的效率,获得了磁场的直观分布.建立磁致旋光估测磁场的实验装置,测量了永磁体的磁场,用CCD采集了偏振光通过磁场的图像,通过程序处理可获得磁铁产生的局部磁场二维分布图,并可求得二维分布图上任意点的磁感应强度.For overcoming the limitation of existing measurements of magnetic field, those measurements which can only measure single point,according to the principle of Faraday magneto-optic rotation effect,we estimate the distribution of two-dimensional magnetic field. Using this measurement, the efficiency of the measuring magnetic field is improved, and the intuitionistic distribution is obtained. The experimental equipment is established. The magnetic field of permanent magnet is measured. The picture of polarized light via magnetic field is collected by CCD. By program processing to these pictures, the two dimensional distribution of the partial magnetic is obtained. The value of the two-dimensional distribution of the partial magnetic is obtained.

关 键 词：磁场 磁致旋光效应 磁致旋光成像 

分 类 号：O436.4[机械工程—光学工程]