P. Wang et al., ANALYTIC-EXPRESSION FOR FRESNEL DIFFRACTION, Journal of the Optical Society of America. A, Optics, image science,and vision., 15(3), 1998, pp. 684-688
An analytic formula for the Light field amplitude (and therefore also
intensity) behind a circular aperture illuminated by spherical or plan
e waves in the Fresnel limit is given, and the essential difference be
tween Fresnel diffraction and Fraunhofer diffraction is discussed. (C)
1998 Optical Society of America.