基于Lau效应测量光波长的讨论  

Measurement of optical wavelength based on Lau effect

作　　者：朱岱巍[1] 林伟华[1] 张硕[1] 姚金[1] 

机构地区：[1]武汉大学物理科学与技术学院物理教学实验中心,湖北武汉430072

出　　处：《物理实验》2012年第10期35-38,共4页Physics Experimentation

基　　金：国家基础科学人才培养基金(No.J1210061);武汉大学本科生业余科研(No.S2011125)

摘　　要：利用双光栅Lau效应测量光波长的原理,提出了筛选有效数据的方法,并详细讨论了通过测量两光栅间距和Lau条纹周期分别计算波长的可行性问题.通过综合考虑对实验可能产生影响的各种因素,认为利用两光栅间距计算波长虽然标准差较大,但相对偏差小,结果更接近真实值,是一种可行的方法;但利用Lau条纹周期计算的波长看似标准差小,但与真实值的相对偏差较大,从统计和实验的观点来说该方法是不可行的,只能作为一种参考方法.The theory of measuring optical wavelength was introduced based on Lau effect, the method to obtain effective data was proposed, and the feasibility of calculating the optical wavelength by measuring the grating space and the period of Lau fringes, respectively, was discussed in detail. A general accounting of the possible reasons that could affect the experimental measurement indicated that the wavelength calculated with the grating space had a small relative error and a big standard deviation, this method was still feasible. However, the wavelength calculated with the period of Lau fringes had a small standard deviation but a big relative error, thus it was not a feasible method in the statistical and experimental view.

关 键 词：Lau效应 光波长 测量精度 

分 类 号：O436.1[机械工程—光学工程]