| 台阶光栅衍射的傅里叶分析 |
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| 引用本文： | 张耀举,郑崇伟. 台阶光栅衍射的傅里叶分析[J]. 光学技术, 2002, 28(6): 510-512 |
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| 作者姓名： | 张耀举 郑崇伟 |
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| 作者单位： | 温州师范学院,物理与电子信息科学系,福建,温州,325000 |
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| 摘 要： | 提出了一种台阶光栅模型 ,并应用傅里叶光学方法推导出了反射式衍射光强的表达式。分析计算了衍射光强随台阶数、入射波长、衍射角和轮廓角 (闪耀角 )的变化关系。结果表明 ,台阶光栅能起到闪耀作用 ,台阶对衍射强度分布有影响 ,但不改变衍射光极大值的位置 ,随台阶数的增加 ,能量逐渐向闪耀方向集中。当台阶数等于 8时 ,其衍射效率可接近三角形闪耀光栅的衍射。台阶光栅衍射的傅里叶分析对光栅制作有一定的指导意义
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| 关 键 词： | 台阶光栅 傅里叶光学 衍射 |
| 文章编号： | 1002-1582(2002)06-0510-03 |
| 修稿时间： | 2001-12-03 |
Diffraction analysis of step gratings with Fourier optics |
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| ZHANG Yao ju,ZHENG Chong wei. Diffraction analysis of step gratings with Fourier optics[J]. Optical Technique, 2002, 28(6): 510-512 |
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| Authors: | ZHANG Yao ju ZHENG Chong wei |
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| Abstract: | The distribution formula of diffraction intensity for a model of the reflective step gratings is deduced in more detail on the basis of Fourier optics' method. The diffraction intensity change with to step number L , incidence wavelength λ ,diffraction angle θ and outline angle (blazed angle) φ 0 is analyzed. The diffraction efficiency at the blazed level rises as the increase of L . While L>8 ,it is varying fully towards the diffraction of the triangle blazed gratings. These results have certain directory meanings to make gratings. |
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| Keywords: | step grating Fourier optics diffraction |
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