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Bao Sun

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Proceedings Article | 10 October 2020 Poster + Presentation + Paper

Simulation calculation of diffraction intensity of non-equal period grating

Jianyu Zhang, Bin Yao, Bao Sun, Junwei Wang, Jiarui Qi

Proceedings Volume 11551, 115511R (2020) https://doi.org/10.1117/12.2575008

KEYWORDS: Diffraction gratings, Diffraction, Physics, Far-field diffraction, Fourier transforms

Read Abstract +

The grating diffraction intensity distribution law is an important link in both optics and college physics courses. Grating diffraction experiments are also very important in physics experiments. However, the gratings involved in optics and college physics experiments are all Equal period, the distribution of grating diffraction intensity in this has been researched quite mature. However, in some engineering fields, the intensity distribution law of a non-equal period grating diffraction is often concerned. In this paper, based on Kirchhoff diffraction theory, Fraunhofer diffraction conditions are applied, and the Huygens-Fresnel principle Starting from, it is feasible to apply the Fourier transform method to deal with the distribution law of light intensity of non-constant period gratings. Then it is further explained that there is a certain regularity of the light intensity distribution law and the characteristics of the grating after diffraction by the non-equal period grating.

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