Finite thickness effect of a zone plate on focusing hard x-rays

Wenbing Yun; John J. Chrzas; P. James Viccaro

doi:10.1117/12.23311

1 January 1991 Finite thickness effect of a zone plate on focusing hard x-rays

Wenbing Yun, John J. Chrzas, P. James Viccaro

Proceedings Volume 1345, Advanced X-Ray/EUV Radiation Sources and Applications; (1991) https://doi.org/10.1117/12.23311
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Spatial resolution and focusing efficiency are two important properties of a zone plate in x-ray focusing applications. A general expression of the zone plate equation describing its zone registration is derived from the interference of spherical waves emited from two mutually coherent point sources. An analytical expression of the focusing efficiency in terms of the zone plate thickness and x-ray refractive indices of the zones is also derived. Validity condition for using this expression is considered. Thickness required for obtaining adequate focusing efficiency is calculated as a function of x-ray energy for several representative materials. The spatial resolution of a finite thickness zone plate is worse than that of an infinetly thin zone plate which is approximately equal to the smallest zone width of the zone plate. The effect of the finite thickness on the spatial resolution is considered. This manuscript has been authored under contract number W-31-109-ENG-38 with the U. S. Department of Energy. Accordingly the U. S. Government retains a non-exclusive royalty-free license to publish or reproduce the published form of this contribution or allow others todo so for U. S. Government purposes. 146 / SPIE Vol 1345 Advanced X-Ray/EUV Radiation Sources andApplications(1990)

Citation Download Citation

Wenbing Yun, John J. Chrzas, and P. James Viccaro "Finite thickness effect of a zone plate on focusing hard x-rays", Proc. SPIE 1345, Advanced X-Ray/EUV Radiation Sources and Applications, (1 January 1991); https://doi.org/10.1117/12.23311

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