Diffraction theory for azimuthally structured Fresnel zone plate

A conventional Fresnel zone plate (FZP) consists of concentric rings with an alternating binary transmission of zero and one. In an azimuthally structured Fresnel zone plate (aFZP), the light transmission of the transparent zones is modulated in the azimuthal direction, too. The resulting structure...

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Bibliographic Details
Published in:Journal of the Optical Society of America. A, Optics, image science, and vision Optics, image science, and vision, 2014-02, Vol.31 (2), p.363-372
Main Authors: Vierke, Thordis, Jahns, Jürgen
Format: Article
Language:English
Subjects:
Diffraction theory
Focal plane
Fresnel zones
Imaging
Optical transfer function
Plates (structural members)
Ring structures
Ultraviolet
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Summary:A conventional Fresnel zone plate (FZP) consists of concentric rings with an alternating binary transmission of zero and one. In an azimuthally structured Fresnel zone plate (aFZP), the light transmission of the transparent zones is modulated in the azimuthal direction, too. The resulting structure is of interest for extreme ultraviolet and x-ray imaging, in particular, because of its improved mechanical stability as compared to the simple ring structure of an FZP. Here, we present an analysis of the optical performance of the aFZP based on scalar diffraction theory and show numerical results for the light distribution in the focal plane. These will be complemented by calculations of the optical transfer function.
ISSN:1084-7529
1520-8532
DOI:10.1364/JOSAA.31.000363