opcsim.mie.s1s2¶

opcsim.mie.s1s2(refr, x, theta)¶

Compute the complex scattering amplitudes S1 and S2 at angle theta.

Bohren and Huffman (1983) list the equations for computing the complex scattering amplitudes as Eq. 4.74:

\[S_1=\sum_{n=1}^{n_c}\frac{2n+1}{n(n+1)}(a_n\pi_n + b_n\tau_n),\]

\[S_2=\sum_{n=1}^{n_c}\frac{2n+1}{n(n+1)}(a_n\tau_n + b_n\pi_n)\]

Parameters

refr: complex: The complex refractive index.
x: float: The dimensionless size parameter.
theta: float: The scattering angle in degrees.

Returns

S_1, S_2: complex: The complex scattering amplitudes.