OpticalFunction class

class pySCATMECH.fresnel.OpticalFunction(name, iter=None)

Bases: object

Class for handling optical functions.

Parameters:

name (string, complex, float, or function returning complex or float) – The complex index of refraction. If a string, it can be a “(n,k)” pair or the name of a file containing a table of wavelengths, n, and k.

nkstr(wavelength=1)

Evaluate the optical constants n and k at wavelength and returns a string that can be used by SCATMECH::dielectric_function.

Parameters:

wavelength (float) – The wavelength

Returns:

  • str

  • The complex optical constant as a string “(n,k)” or the name of

  • a file.

writeToFile(filename, wavelengths)

Write the optical function to a file that can be used by SCATMECH routines as a SCATMECH::dielectric_function.

Parameters:

  • filename (str) – The name of the file

  • wavelengths (iterable of float) – The wavelengths that will be written.

Returns:

  • str

  • The filename, if successful,

  • (n,k) at the first wavelength if not successful