کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1542588 1512644 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design of Fresnel lenses and binary-staircase kinoforms of low value of the aperture number
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Design of Fresnel lenses and binary-staircase kinoforms of low value of the aperture number
چکیده انگلیسی

The design of plane Fresnel zone plates, and binary-staircase kinoforms, has been analyzed in this paper for a non-imaging application aimed to increase the performance of point-like detectors. They maximize the irradiance at the focal point of the diffractive element maintaining some constrains in the lateral size of the element. The design of the binary-staircase kinoform has been described as an iterative process. Some interesting results have been obtained for the values of the relative aperture number, or F/#. The practical case treated here produces elements with very low F/#. The results shows that the gain of the irradiance at the focal point increases with the focal distance of the binary-staircase kinoform, and decreases with the focal length for a plane Fresnel zone plate having a limited lateral size. The calculation of the width of the irradiance distribution makes it possible to select those solutions that best concentrate the irradiance on the focal plane.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 260, Issue 2, 15 April 2006, Pages 454–461
نویسندگان
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