| 计算机模拟任意形状衍射屏的衍射 |
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| 引用本文： | 张庆,刘秋武.计算机模拟任意形状衍射屏的衍射[J].物理实验,2006,26(10):14-17. |
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| 作者姓名： | 张庆 刘秋武 |
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| 作者单位： | 韩山师范学院,物理与电子工程系,广东,潮州,521041 |
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| 基金项目： | “第四届全国高等院校物理实验教学研讨会”论文 |
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| 摘 要： | 把菲涅耳衍射积分化为含快速傅里叶变换的积分,对任意形状衍射屏的衍射进行模拟,其特点是直接用含快速傅里叶变换的积分求解出不同传播距离观察屏上的光场分布,得出菲涅耳衍射和夫琅禾费衍射的衍射花样.通过计算机对常见的缝孔的衍射的模拟,有助于理解衍射光在传播方向上近场衍射和远场衍射的不同和衍射花样的分布特征.
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| 关 键 词： | 菲涅耳衍射 夫琅禾费衍射 快速傅里叶变换 |
| 文章编号： | 1005-4642（2006）10-0014-04 |
| 收稿时间： | 2006-05-05 |
| 修稿时间： | 2006年5月5日 |
Computer simulation of light wave diffraction by screens of different shape |
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| ZHANG Qing,LIU Qiu-wu.Computer simulation of light wave diffraction by screens of different shape[J].Physics Experimentation,2006,26(10):14-17. |
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| Authors: | ZHANG Qing LIU Qiu-wu |
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| Institution: | Department of Physics and Electronic Engineering, Hanshan Teachers College, Chaozhou 521041, China |
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| Abstract: | The Fresnel diffraction integral is carried out with numerical methods using fast Fourier transform(FFT),and the diffraction of light wave by different screens are simulated.The light field distribution of Fraunhofer diffraction and Fresnel diffraction can be calculated directly when an observer plane is placed at different distances from the screen.Simulation of diffraction of common slit/hole on computer is of advantage for us to understand the difference of diffraction in near and far fields and the pattern distribution. |
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| Keywords: | Fresnel diffraction Fraunhofer diffraction fast Fourier transform |
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