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Gas in Scattering Media Absorption Spectroscopy - GASMAS

Svanberg, Sune LU (2008) 6th International Conference on Advanced Optical Materials and Devices (AOMD-6) In Sixth International Conference On Advanced Optical Materials And Devices (Aomd-6) 7142.
Abstract
An overview of the new field of Gas in Scattering Media Absorption Spectroscopy (GASMAS) is presented. GASMAS combines narrow-band diode-laser spectroscopy with diffuse media optical propagation. While solids and liquids have broad absorption features, free gas in pores and cavities in the material is characterized by sharp spectral signatures, typically 10,000 times sharper than those of the host material. Many applications in materials science, food packaging, pharmaceutics and medicine have been demonstrated. So far molecular oxygen and water vapour have been studied around 760 and 935 nm, respectively. Liquid water, an important constituent in many natural materials, such as tissue, has a low absorption at such wavelengths, allowing... (More)
An overview of the new field of Gas in Scattering Media Absorption Spectroscopy (GASMAS) is presented. GASMAS combines narrow-band diode-laser spectroscopy with diffuse media optical propagation. While solids and liquids have broad absorption features, free gas in pores and cavities in the material is characterized by sharp spectral signatures, typically 10,000 times sharper than those of the host material. Many applications in materials science, food packaging, pharmaceutics and medicine have been demonstrated. So far molecular oxygen and water vapour have been studied around 760 and 935 nm, respectively. Liquid water, an important constituent in many natural materials, such as tissue, has a low absorption at such wavelengths, allowing propagation. Polystyrene foam, wood, fruits, food-stuffs, pharmaceutical tablets, and human sinus cavities have been studied. Transport of gas in porous media can readily be studied by first immersing the material in, e. g., pure nitrogen, and then observing the rate at which normal air, containing oxygen, reinvades the material. The conductance of the sinus connective passages can be measured in this way by flushing the nasal cavity with nitrogen. Also other dynamic processes such as drying of materials can be studied. The techniques have also been extended to remote-sensing applications (LIDAR-GASMAS). (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Diode laser spectroscopy, scattering media, gas absorption, polystyrene, foam, fruit, food, human sinuses, lidar
in
Sixth International Conference On Advanced Optical Materials And Devices (Aomd-6)
volume
7142
publisher
SPIE
conference name
6th International Conference on Advanced Optical Materials and Devices (AOMD-6)
external identifiers
  • wos:000288002300001
  • scopus:67649375601
ISSN
1996-756X
0277-786X
DOI
10.1117/12.816469
language
English
LU publication?
yes
id
258f13e0-c14b-4342-8e41-d73982822485 (old id 1917513)
date added to LUP
2011-05-13 11:52:13
date last changed
2017-11-20 15:06:03
@inproceedings{258f13e0-c14b-4342-8e41-d73982822485,
  abstract     = {An overview of the new field of Gas in Scattering Media Absorption Spectroscopy (GASMAS) is presented. GASMAS combines narrow-band diode-laser spectroscopy with diffuse media optical propagation. While solids and liquids have broad absorption features, free gas in pores and cavities in the material is characterized by sharp spectral signatures, typically 10,000 times sharper than those of the host material. Many applications in materials science, food packaging, pharmaceutics and medicine have been demonstrated. So far molecular oxygen and water vapour have been studied around 760 and 935 nm, respectively. Liquid water, an important constituent in many natural materials, such as tissue, has a low absorption at such wavelengths, allowing propagation. Polystyrene foam, wood, fruits, food-stuffs, pharmaceutical tablets, and human sinus cavities have been studied. Transport of gas in porous media can readily be studied by first immersing the material in, e. g., pure nitrogen, and then observing the rate at which normal air, containing oxygen, reinvades the material. The conductance of the sinus connective passages can be measured in this way by flushing the nasal cavity with nitrogen. Also other dynamic processes such as drying of materials can be studied. The techniques have also been extended to remote-sensing applications (LIDAR-GASMAS).},
  author       = {Svanberg, Sune},
  booktitle    = {Sixth International Conference On Advanced Optical Materials And Devices (Aomd-6)},
  issn         = {1996-756X},
  keyword      = {Diode laser spectroscopy,scattering media,gas absorption,polystyrene,foam,fruit,food,human sinuses,lidar},
  language     = {eng},
  publisher    = {SPIE},
  title        = {Gas in Scattering Media Absorption Spectroscopy - GASMAS},
  url          = {http://dx.doi.org/10.1117/12.816469},
  volume       = {7142},
  year         = {2008},
}