کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
850808 909292 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The diffraction by a small aperture
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
The diffraction by a small aperture
چکیده انگلیسی

We study the diffractions by one small circular aperture, and numerically calculate the diffraction intensity distribution with the help of the finite-difference time-domain (FDTD) technique. The diffraction patterns are presented, the variation of the near-field diffraction with the radius and the propagation distance can be observed clearly. The one-dimensional distributions on the axis, along the boundary shadow and the transverse direction are discussed too. These results are also compared with to ones obtained according to Rayleigh–Sommerfeld diffraction and the Fresnel approximation. We think that this work does not only enrich the diffraction theory of the circular aperture, but it is also helpful for the applications of the small holes in near field.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - International Journal for Light and Electron Optics - Volume 124, Issue 16, August 2013, Pages 2507–2510
نویسندگان
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