NumericalApertureΒΆ

Type:float
Range:[0, inf]
Default:-/-
Appearance:optional

Use the numerical aperture \mathrm{NA} to define the range of the incident Fourier spectrum. When not set the entire propagating spectrum is prescribed.

With the notation of the parent section, Fourier modes with

\begin{eqnarray*}
\Re \left(\frac{\pvec{k}_\perp}{k_0} \right) \leq \mathrm{NA}
\end{eqnarray*}

are computed.