The user may drag the blue sliders to see how beam diameter, EFL and Top-Hat size affect the edges of the Top-Hat.
The figure gives an accurate prediction of the shape and size of the transition region (i.e. how fast the intensity goes from 0 till 100%).
The uniformity on the plateau has been set to +/-0% although in most designs there is some significant ripple, typically +/-10%. For a more accurate prediction of this ripple in a specific design you should contact us.