title: Using the Kramers-Kronig method to determine optical constants and evaluating its suitability as a linear transform for near-normal front-surface reflectance spectra.
abstract: In this paper, the suitability of using the Kramers-Kronig transform to routinely extract optical constants from near-normal incidence reflectance spectra of solids and liquids is demonstrated. In addition, the possibility of utilizing the Kramers-Kronig transform as a linearizing transform for near-normal incidence reflectance spectra is investigated. Also, several commercial Kramers-Kronig software packages were utilized in determining the optical constants from the near-normal incidence reflectance of Plexiglas. Unexpectedly, the results produced by the various packages differed significantly. The near-normal reflectance of water was measured, the Kramers-Kronig transform was applied to extract the optical constants of water, and the result was compared to values found in the literature. Furthermore, the Kramers-Kronig transforms of near-normal incidence reflectance spectra of various concentrations of sugar in water were calculated to evaluate its use as a linearizing transform for quantitative applications.
authors.affiliation: John Jay College of Criminal Justice, The City University of New York, Department of Sciences, 445 W 59th Street, New York, New York 10019, USA.
authors.forename: A
authors.initials: A
authors.lastname: Kocak
authors.forename: S L
authors.initials: SL
authors.lastname: Berets
authors.forename: V
authors.initials: V
authors.lastname: Milosevic
authors.forename: M
authors.initials: M
authors.lastname: Milosevic