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ICOP & ICPET 2015, 21 - : 1137-1140 Back to browse issues page
Generation of circular vortex and Bessel beam by a corrected-phase Fresnel zone plate
Arash Sabatyan * 1, Bahar Meshginqalam
Abstract:   (1699 Views)
In this paper, focusing properties of a radially shifted zone plate was examined. This FZP can turn an incident plane wave into an annular beam at its focal plane. High efficiency and flexibility are the advantages of this method. By performing direct calculations, it is shown that a radially shifted zone plate produces annulus focus. All results are completely verified by experiments. Finally, it is clearly revealed that at a certain distance from the focal plane, an annular beam is transformed into a Bessel beam, and a focal line is formed.
Keywords: Fresnel diffraction, Bessel beam, Fresnel zone plate, Diffractive lenses
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Type of Study: Research | Subject: Special
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Sabatyan A, Meshginqalam B. Generation of circular vortex and Bessel beam by a corrected-phase Fresnel zone plate. ICOP & ICPET. 2015; 21 :1137-1140
URL: http://opsi.ir/article-1-604-en.html


Volume 21 - Back to browse issues page
انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
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