title: Fresnel number of a regular polygon and slit.
abstract: The concept of the Fresnel number is generalized to make it possible to describe the regular polygon and slit illuminated by a homogeneous plane wave. The generalization is based on nonlinear regression of the axial intensity distribution curve. A useful analytical expression for the Fresnel number is presented. A simple experiment to show the different Fresnel numbers in one observation plane is illustrated.
authors: Department of Physics, Zhejiang University, Xi-Xi Campus, Hangzhou 310028, China.
authors: S
authors: S
authors: Wang
authors: Q
authors: Q
authors: Lin
authors: L
authors: L
authors: Yu
authors: X
authors: X
authors: Xu