title: Optical properties of porcine dermis in the mid-infrared absorption band of glucose.
abstract: The optical properties of skin in the mid-infrared range are not known, despite their importance for e.g. non-invasive glucose monitoring. In this paper, transmission, absorption, scattering, and reduced scattering coefficients are quantified using a custom-built goniometer based on a quantum cascade laser operated at the glucose absorption band at a wavelength of around 9.7 μm. The measurements show a strong dominance of absorption and moderate contributions from scattering. The scattered radiation is dominated by single scattering events in the forward direction (g = 0.967) within the range of the investigated dermis layer thicknesses of up to 50 μm, whereby the fraction of multiple scattering is expected to increase with the layer thickness.
authors.affiliation: Kirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany. wolfgang.petrich@kip.uni-heidelberg.de.
authors.forename: Arthur
authors.initials: A
authors.lastname: Schönhals
authors.forename: Hans
authors.initials: H
authors.lastname: Tholl
authors.forename: Mathias
authors.initials: M
authors.lastname: Glasmacher
authors.forename: Niels
authors.initials: N
authors.lastname: Kröger-Lui
authors.forename: Annemarie
authors.initials: A
authors.lastname: Pucci
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Petrich
mesh_terms: D000818:Animals; D020405:Dermis / Q000000981:diagnostic imaging*; D005947:Glucose / Q000737:chemistry*; D054023:Lasers, Semiconductor; D012542:Scattering, Radiation; D019265:Spectroscopy, Near-Infrared; D013552:Swine
chemical_list: D005947:Glucose