平行光垂直入射光栅面的调节方法探讨  

Discussion on the Adjustment Method about Parallel Light of Vertical Incidence into Grating Surface

作　　者：李子良[1] 陆丁 Li Ziliang;Lu Ding(School of Science,China University of Mining and Technology(Beijing),Beijing 100083;Middle School Attached to Beijing Jiaotong University,Beijing 100081)

机构地区：[1]中国矿业大学(北京)理学院,北京100083 [2]北京交通大学附属中学,北京100081

出　　处：《物理通报》2018年第11期70-73,共4页Physics Bulletin

摘　　要：对光栅衍射实验中调节平行光垂直入射光栅面的问题,讨论了一种易于理解和掌握的调节方法.该方法不同于自准直法,它是根据测量出的正负一级光谱的偏向角的大小来调节光栅面的旋转方向进而满足垂直入射要求的.另外,还通过理论分析证明了该操作方法的合理性,通过误差分析说明了在不同精度要求下当正负一级光谱的偏向角之差在一定范围内时即可认为平行光是垂直入射到光栅上的.This paper discusses an easily understood and learned method for adjusting the parallel light vertically incident upon the grating in the grating diffraction experiment.Different from autocollimation method,this method meets the vertical incidence requirement by adjusting the rotation direction of the grating according to the sizes of measured deviation angles of the positive and negative first-order spectrum.Moreover,the theoretical analysis shows that the operation method is reasonable.And the error analysis shows that under different precision requirements when the difference of deviation angles between positive and negative first-order spectrum is limited in a certain range,the light can be regarded as vertically incident on the grating.

关 键 词：光栅 衍射 垂直入射 误差 

分 类 号：O436.1[机械工程—光学工程]