Hi all,
I'm trying to simulate the Fresnel diffraction by using this expersion :
$$ A(x')=\frac{1}{j\lambda z}e^{jk(z+\frac{x'^2}{2z})}F(A^{trans}(x)e^{jk\frac{x^2}{2z}})_{u=\frac{x'}{\lambda z}} $$
So when I use this formula my problem is that I don't know how to take the good frequency, here...