pymiediff.coreshell.ab

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pymiediff.coreshell.ab#

pymiediff.coreshell.ab(x, y, n, m1, m2, backend='torch', which_jn='stable', precision='double')#

an and bn scattering coefficients

optimised to call the bessel functions the lowest amount of times

Absorption and scattering of light by small particles. Pg. 183 and Equ. 8.1.

Parameters:

  • x (torch.Tensor) – size parameter (core)

  • y (torch.Tensor) – size parameter (shell)

  • n (torch.Tensor) – orders to compute

  • m1 (torch.Tensor) – relative refractive index of core

  • m2 (torch.Tensor) – relative refractive index of shell

  • backend (str, optional) – backend to use for spherical bessel functions. Either ‘scipy’ or ‘torch’. Defaults to ‘scipy’.

  • which_jn (str, optional) – only for “torch” backend. Which algorithm for j_n to use. Either ‘stable’ or ‘fast’. Defaults to ‘stable’.

  • precision (str, optional) – “single” our “double”. defaults to “double”.

Returns:

result

Return type:

torch.Tensor

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