We establish the equivalent pupil function (EPF) theory for general modified Fresnel zone plates (MFZP). The total diffracted field distribution at the focal plane is the Fourier-Bessel transform of the EPF. This theory can be used for the focusing analysis of pre-given MFZPs and for construction of desired focal spots.
© 2004 Optical Society of America
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1970) Diffraction and gratings : Diffractive optics
(340.0340) X-ray optics : X-ray optics
(340.7440) X-ray optics : X-ray imaging
Q. Cao and J. Jahns, "Equivalent pupil functions for modified Fresnel zone plates," in Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing, OSA Technical Digest Series (Optical Society of America, 2004), paper FWA4.
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