i_per

miepython.core.i_per(m, x, mu, norm='albedo', n_pole=0)[source]

Return the scattered intensity in a plane normal to the incident light.

This is the scattered intensity in a plane that is perpendicular to the field of the incident plane wave. The intensity is normalized such that the integral of the unpolarized intensity over 4π steradians is equal to the single scattering albedo.

The normalization is controlled by norm and should be one of [‘albedo’, ‘one’, ‘4pi’, ‘qext’, ‘qsca’, ‘bohren’, or ‘wiscombe’] The normalization describes the integral of the scattering phase function over all 4𝜋 steradians.

Parameters:

  • m – the complex index of refraction of the sphere

  • x – the size parameter of the sphere

  • mu – the angles, cos(theta), to calculate intensities

  • norm – (optional) string describing scattering function normalization

  • n_pole – return n_pole term from series (default=0 means add all terms)

Returns:

The intensity at each angle in the array mu. Units [1/sr]