Peng Wang, Yuguang Xu, Wei Wang, Zhijian Wang
Abstract
An analytic formula for the light field amplitude (and therefore also intensity) behind a circular aperture illuminated by spherical or plane waves in the Fresnel limit is given, and the essential difference between Fresnel diffraction and Fraunhofer diffraction is discussed.
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An analytic formula for the light field amplitude (and therefore also intensity) behind a circular aperture illuminated by spherical or plane waves in the Fresnel limit is given, and the essential difference between Fresnel diffraction and Fraunhofer diffraction is discussed.
Key concepts: Fresnel diffraction, Fresnel number, Fresnel integral, Diffraction, Optics, Fresnel zone, Physics, Kirchhoff's diffraction formula