| 高斯光束照射下的圆盘夫琅禾费衍射 |
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| 引用本文： | 让庆澜.高斯光束照射下的圆盘夫琅禾费衍射[J].大学物理,1997,16(11):5-9,23. |
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| 作者姓名： | 让庆澜 |
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| 作者单位： | 北京大学物理系 |
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| 摘 要： | 推导了高斯光束照射圆孔或圆盘的衍射场普遍表达式，计算了半波带数接近于零的情况下上述衍射场的数据，进而分析了圆盘衍射场在艾里斑中增加一个暗环的原因。
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| 关 键 词： | 圆盘衍射 高斯光束 菲涅耳半波带 衍射光学 |
THE FRAUNHOFER DIFFRACTION AT A CIRCULAR DISC ILLUMINATED BY A GAUSSIAN BEAM |
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| Rang Qinglan.THE FRAUNHOFER DIFFRACTION AT A CIRCULAR DISC ILLUMINATED BY A GAUSSIAN BEAM[J].College Physics,1997,16(11):5-9,23. |
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| Authors: | Rang Qinglan |
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| Abstract: | The general expression of the diffraction field at a circular aperture (or disc) illuminated by a Gaussian beam is derived. A systematic set of data of the above diffraction field for some particular conditions with a near-zero number of half-period zones is calculated. The phenomenon of a dark ring in the Airy disc for the diffraction field at an opaque strip (or a disc) is explained. |
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| Keywords: | diffraction at a circular disc Gaussian beam Fresnel's half-period zones |
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