The Kramers-Kronig analysis of transmission spectra (KKTRANS)

V. Ossenkopf,
MPG AG ``Dust in Star-Forming Regions'' Jena

The Kramers-Kronig analysis of transmission spectra (KKTRANS) is an application of the more general Kramers-Kronig analysis routines of KKTOOL for the derivation of optical constants from transmission spectra of samples with inclusions of separated small spherical particles. The sample must be optically thin and the embedding matrix material is characterized by a constant real refractive index. A convenient extrapolation of the transmission spectrum outside of the measured range has to be done by the user. Several standard functions for the extrapolations are available and the continuation can be visually controlled. The obtained optical constants may be stored in various forms.