Sigma¶

Type:: Vector<float>
Range:: [v_1, …, v_2]
Default:: -/-
Appearance:: simple
Excludes:: Amplitude, K, ThetaPhi

For a non- $\pvec{k}, \pvec{A}$ based definition of the plane wave, this parameter specifies the incidence angle by $\sigma$ -coordinates in the pupil plane (see parent).