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Laser light scattering in turbid media part I: Experimental and simulated results for the spatial intensity distribution

Berrocal, Edouard LU ; Sedarsky, David LU ; Paciaroni, Megan LU ; Meglinski, Igor V. and Linne, Mark LU (2007) In Optics Express 15(17). p.10649-10665
Abstract
We investigate the scattering and multiple scattering of a typical laser beam (lambda= 800 nm) in the intermediate scattering regime. The turbid media used in this work are homogeneous solutions of monodisperse polystyrene spheres in distilled water. The two-dimensional distribution of light intensity is recorded experimentally, and calculated via Monte Carlo simulation for both forward and side scattering. The contribution of each scattering order to the total detected light intensity is quantified for a range of different scattering phase functions, optical depths, and detection acceptance angles. The Lorentz-Mie scattering phase function for individual particles is varied by using different sphere diameters (D = 1 and 5 mu m). The... (More)
We investigate the scattering and multiple scattering of a typical laser beam (lambda= 800 nm) in the intermediate scattering regime. The turbid media used in this work are homogeneous solutions of monodisperse polystyrene spheres in distilled water. The two-dimensional distribution of light intensity is recorded experimentally, and calculated via Monte Carlo simulation for both forward and side scattering. The contribution of each scattering order to the total detected light intensity is quantified for a range of different scattering phase functions, optical depths, and detection acceptance angles. The Lorentz-Mie scattering phase function for individual particles is varied by using different sphere diameters (D = 1 and 5 mu m). The optical depth of the turbid medium is varied (OD = 2, 5, and 10) by employing different concentrations of polystyrene spheres. Detection angles of theta(a) = 1.5 and 8.5 are considered. A novel approach which realistically models the experimental laser source is employed in this paper, and very good agreement between the experimental and simulated results is demonstrated. The data presented here can be of use to validate other modern Monte Carlo models, which generate high resolution light intensity distributions. Finally, an extrapolation of the Beer-Lambert law to multiple scattering is proposed based on the Monte Carlo calculation of the ballistic photon contribution to the total detected light intensity. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
15
issue
17
pages
10649 - 10665
publisher
OSA
external identifiers
  • wos:000249336000019
  • scopus:34548079059
ISSN
1094-4087
language
English
LU publication?
yes
id
7fcfce4a-20c9-462a-b1ec-9d541723cb27 (old id 657016)
alternative location
http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-17-10649
date added to LUP
2007-12-05 15:46:00
date last changed
2017-09-10 04:35:31
@article{7fcfce4a-20c9-462a-b1ec-9d541723cb27,
  abstract     = {We investigate the scattering and multiple scattering of a typical laser beam (lambda= 800 nm) in the intermediate scattering regime. The turbid media used in this work are homogeneous solutions of monodisperse polystyrene spheres in distilled water. The two-dimensional distribution of light intensity is recorded experimentally, and calculated via Monte Carlo simulation for both forward and side scattering. The contribution of each scattering order to the total detected light intensity is quantified for a range of different scattering phase functions, optical depths, and detection acceptance angles. The Lorentz-Mie scattering phase function for individual particles is varied by using different sphere diameters (D = 1 and 5 mu m). The optical depth of the turbid medium is varied (OD = 2, 5, and 10) by employing different concentrations of polystyrene spheres. Detection angles of theta(a) = 1.5 and 8.5 are considered. A novel approach which realistically models the experimental laser source is employed in this paper, and very good agreement between the experimental and simulated results is demonstrated. The data presented here can be of use to validate other modern Monte Carlo models, which generate high resolution light intensity distributions. Finally, an extrapolation of the Beer-Lambert law to multiple scattering is proposed based on the Monte Carlo calculation of the ballistic photon contribution to the total detected light intensity.},
  author       = {Berrocal, Edouard and Sedarsky, David and Paciaroni, Megan and Meglinski, Igor V. and Linne, Mark},
  issn         = {1094-4087},
  language     = {eng},
  number       = {17},
  pages        = {10649--10665},
  publisher    = {OSA},
  series       = {Optics Express},
  title        = {Laser light scattering in turbid media part I: Experimental and simulated results for the spatial intensity distribution},
  volume       = {15},
  year         = {2007},
}