透射光栅斜入射的简易测量及研究  

Simple Measurement and Study of Oblique Incidence of Transmission Grating

作　　者：陈继超 向文丽[1] CHEN Ji-chao;XIANG Wen-li(ChuXiong Nonnal University,Yunnan Chuxiong 67500)

机构地区：[1]楚雄师范学院,云南楚雄675000

出　　处：《大学物理实验》2018年第5期70-74,共5页Physical Experiment of College

基　　金：楚雄师范学院科研基金立项项目(2015kyjg008)

摘　　要：利用He-Ne激光器(λ=632.8 nm)、可调狭缝、透射光栅和自主改装的半圆刻度盘组合、接收屏搭建简易测量光栅斜入射的系统,精确地测量了入射光线与光栅法线夹角α(入射角)和α(入射角)变化时光栅衍射主最大和次最大的光强,并记录了光栅衍射图样(0级、1级、2级衍射亮斑),利用GSP5en软件原样描绘其衍射图样并分析了其图样和轨迹。结果显示:光栅斜入射相比正入射其光强有一定程度的增强,GSP5en软件描绘出的衍射图样和轨迹精确度高,形象明了,科学可行。无论入射角如何变化,主最大位置(零级亮斑)几乎不偏移,而其它次级的位置随着级数的增大,偏移量越多,入射角α增大时,轨迹的弯曲程度在增大。Using He-Ne laser （λ = 632.8 nm ） , an adjustable slit, a transmission grating and a self modified semicircular dial combination and a receiving screen, a simple measuring system for the oblique incidence of a grating is set up.This platform is applied to measure the angle （named incident angle）of the incident ray and the grating normal line accurately.The main and secondary maximum light intensity was measured and the diffraction pattern of grating （ 0,1 and 2 ） was recorded when the incident angle changed. The diffraction pattern was depleted by GSP5en software accurately and its patterns and trajectories are analyzed by GSP5en software. The results show that the oblique incidence of the grating is enhanced to a certain extent compared with the positive incident light intensity. The accuracy of the diffraction patterns and trajectories described by the GSP5en software is high, the image is clear and it is scientifically feasible.The main maximum position （zero level spot） almost does not shift regardless of the ineident angle, and the offset of the other secondary positions increases with the increase of series.The degree of the curvature of the trajectory increases when the incident angle increases.

关 键 词：光栅 斜入射 简易测量 GSP5en软件 

分 类 号：O4-34[理学—物理]