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arXiv 1002.1999physics.opticsphysics.ed-ph
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用平面波角谱理论和FFT计算近场标量衍射

Numerical calculation of near field scalar diffraction using angular spectrum of plane waves theory and FFT

Adrian Carbajal-Dominguez, J. Bernal, Jesus E. Gomez Correa, Gabriel Martinez Niconoff

摘要:

近场衍射或菲涅耳衍射计算难以精确地执行是已知事实。为了得到更合适的形式,一般需要作一些近似。本文提出了一种基于角谱理论的近场衍射数值计算方法。该方法使用快速傅立叶变换(FFT),结果证明是准确和快速的。为了验证该方法的有效性,分别对圆孔和螺旋缝的衍射近场进行了研究。数值和实验结果显示。该方法可用于实现基于pc的物理光学学习。

英文摘要:

t is a known fact that near field diffraction or Fresnel diffraction calculations are difficult to perform exactly. It is in general necessary to make some approximations in order to obtain a more suitable form. In this work, a numerical implementation based on angular spectrum theory for near field diffraction is presented. The method uses Fast Fourier Transforms (FFT) and it turns out to be accurate and fast. In order to show the capabilities of the method, diffraction near field for a circular aperture and a spiral slit are studied. Numerical and experimental results are shown. This method could be useful to implement pc based physical optics learning.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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