| 用相因子判断法分析条形余弦光栅衍射场 |
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| 引用本文： | 刘有菊.用相因子判断法分析条形余弦光栅衍射场[J].物理与工程,2009,19(1):22-25. |
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| 作者姓名： | 刘有菊 |
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| 作者单位： | 保山师范高等专科学校,云南,保山,678000 |
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| 基金项目： | 致谢：在北京大学作访问学者期间得到了钟锡华教授的精心指导,在此对钟锡华老师表示衷心感谢. |
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| 摘 要： | 基于波前相因子判断法并考虑到光栅孔径的影响，揭示了余弦光栅的衍射场所含基元成分．给出了各基元成分衍射场的积分表达式，进而导出了像面上光强分布的公式，并显示了相应的沿轴线的光强分布曲线，得到各焦斑的半值线宽公式．本研究为余弦光栅用于空间滤波和光学信息处理技术提供了一个理论基础．
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| 关 键 词： | 余弦光栅 波前相因子判断法 菲涅耳衍射 夫琅禾费衍射 |
WAVEFRONT PHASE-FACTOR STUDY DIFFRACTION FIELDS OF SLIT COSINE-GRATING |
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| Liu Youju.WAVEFRONT PHASE-FACTOR STUDY DIFFRACTION FIELDS OF SLIT COSINE-GRATING[J].Physics and Engineering,2009,19(1):22-25. |
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| Authors: | Liu Youju |
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| Institution: | Baoshan Teacher College;Yunnan Baoshan;678000 |
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| Abstract: | Based on the method of wavefront phase-factors and considering of the influence of limited aperture of grating,we have analysed out the diffraction fields by a slit cosine-grating which contain components,i.e.,they are all limited by the slit aperture,and corresponding integral expressions of the diffraction fields are given.Formulae of the amplitude distribution of diffraction fields alone axis are derivated and corresponding a series of curves are shown.Finally the transverse line-width and the axial line... |
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| Keywords: | cosine-grating wavefront phase-factor Fresnel diffraction Fraunhofer diffraction |
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