| 平面透射光栅的菲涅耳衍射 |
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| 引用本文： | 何小荣,张卫平,陈茂鑫.平面透射光栅的菲涅耳衍射[J].大学物理,2007,26(2):1-4. |
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| 作者姓名： | 何小荣 张卫平 陈茂鑫 |
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| 作者单位： | 广西大学,物理科学与工程技术学院,广西,南宁,530004 |
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| 基金项目： | 国家自然科学基金(10364001) |
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| 摘 要： | 从标量场的菲涅耳衍射理论出发,研究了球面波入射平面透射光栅的衍射场,导出菲涅耳衍射场的复振幅分布,并得到光栅菲涅耳衍射角的计算公式．结果表明,在理想情况下菲涅耳衍射的每一级衍射波都是一个球面波;在对菲涅耳衍射角进行新的定义后,衍射角的计算仍然可以采用夫琅禾费衍射的光栅方程．
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| 关 键 词： | 平面透射光栅 菲涅耳衍射 球面波 光栅方程 |
| 文章编号： | 1000-0712（2007）02-0001-04 |
| 收稿时间： | 2006-04-03 |
| 修稿时间： | 2006-09-13 |
Fresnel diffraction of a plane transmission grating |
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| HE Xiao-rong,ZHANG Wei-ping,CHEN Mao-xin.Fresnel diffraction of a plane transmission grating[J].College Physics,2007,26(2):1-4. |
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| Authors: | HE Xiao-rong ZHANG Wei-ping CHEN Mao-xin |
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| Institution: | The College of Physics Science and Technology, Guangxi University, Nanning 530004, China |
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| Abstract: | Based on Fresnel diffraction theory,the diffraction field of a spherical wave through a plane trans- mission grating is studied in detail.The amplitude distribution of Fresnel diffraction and a calculation formula for Fresnel diffraction angle of a grating are given.The waves in each order of Fresnel diffraction are spherical wav- es under ideal conditions.The diffraction angles can still be given by the grating equation of Fraunhofer diffrac- tion after Fresnel diffraction angle is redefined. |
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| Keywords: | plane transmission grating Fresnel diffraction spherical wave grating equation |
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