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Combined optical porosimetry and gas absorption spectroscopy in gas-filled porous media using diode-laser-based frequency domain photon migration

Publiceringsår: 2012
Språk: Engelska
Sidor: 16942-16954
Publikation/Tidskrift/Serie: Optics Express
Volym: 20
Nummer: 15
Dokumenttyp: Artikel
Förlag: Optical Society of America


A combination method of frequency domain photon migration (FDPM) and gas in scattering media absorption spectroscopy (GASMAS) is used for assessment of the mean optical path length (MOPL) and the gas absorption in gas-filled porous media, respectively. Polystyrene (PS) foams, with extremely high physical porosity, are utilized as sample materials for proof-of-principle demonstration. The optical porosity, defined as the ratio between the path length through the pores and the path length through the medium, is evaluated in PS foam and found consistent with the measured physical porosity. The method was also utilized for the study of balsa and spruce wood samples. (C) 2012 Optical Society of America



  • Physics and Astronomy


  • ISSN: 1094-4087

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