用衍射光栅测波长的两种方法比较  

Comparison of two methods to measure wavelength with diffraction grating

作　　者：冯正南[1] 杨海英[2] 

机构地区：[1]北华大学物理学院,吉林吉林132013 [2]吉林市第五中学教研室,吉林吉林132011

出　　处：《吉林化工学院学报》2011年第5期74-75,共2页Journal of Jilin Institute of Chemical Technology

摘　　要：在用衍射光栅测波长的实验中,通过对垂直入射法与最小偏向角法对比,发现最小偏向角法虽然相对于垂直入射法避免了因平行光无法垂直入射而产生的误差,但在确定最小偏转角位置时同样引入了新的误差,导致了在计算两种方法结果不确定度时几乎相等.所以,最小偏转角法并不比垂直入射法更加精确.In experiment of wavelength measurement with diffraction grating,the vertical-incidence method is compared with the method of the minimum deviation angle.The method of minimum deviation angle can avoid the error induced by the vertical incidence of parallel light,but there is another error existed when fixing the minimum deviation angle.So the uncertainties of two methods are almost equal to each other.Therefore the method of minimum deviation angle is not more precise than the other one.

关 键 词：衍射光栅 垂直入射法 最小偏向角法 

分 类 号：O436.1[机械工程—光学工程]