Path: Imaging/Optics
% Compute the Fresnel Number.
This represents the number of Fresnel's half wave zones in the pupil.
--------------------------------------------------------------------------
Form:
N = FresnelNumber( a, lambda, R )
--------------------------------------------------------------------------
------
Inputs
------
a (1,1) Aperture (mm)
lambda (1,1) Wavelength (nm)
R (1,1) Distance from aperture to Gaussian image plane (mm)
-------
Outputs
-------
N (1,1) Fresnel Number
--------------------------------------------------------------------------
Reference: Virendra N. Mahajan, "Beam Focusing and Depth of Focus,"
The Aerospace Corporation.
--------------------------------------------------------------------------
Back to the Imaging Module page