• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire Angevin de Mécanique, Procédés et InnovAtion (LAMPA)
  • View Item
  • Home
  • Laboratoire Angevin de Mécanique, Procédés et InnovAtion (LAMPA)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Assessment of the effective attenuation coefficient of scattering media illuminated by a LED array : Effect of the beam size

Type
Communications avec actes
Author
LE POMMELLEC, Jean-Yves
211916 Laboratoire Arts et Métiers ParisTech - Ecoulements Complexes Photonique et Surfaces [LAMPA-ECPS]
PIRON, Vianney
211916 Laboratoire Arts et Métiers ParisTech - Ecoulements Complexes Photonique et Surfaces [LAMPA-ECPS]
ASKOURA, Mohamed-Lamine
241651 Unité de Recherche en Agroalimentaire sur les Produits et les Procédés, SFR 4207 QUASAV [GRAPPE]
L'HUILLIER, Jean-Pierre
211916 Laboratoire Arts et Métiers ParisTech - Ecoulements Complexes Photonique et Surfaces [LAMPA-ECPS]

URI
http://hdl.handle.net/10985/10054
DOI
10.1117/12.2183433
Date
2015

Abstract

The knowledge of the light fluence rate distribution inside a biological tissue irradiated by a Laser (or LED) is fundamental to achieve medical treatments. In this paper, we present a semi-analytical model based on the 2-D Fourier Transform of the diffusion equation. This method can be applied to any irradiation source (cylindrically symmetric or not) at the surface of the tissue. Two particular beam shapes are studied: planar irradiation and flat beam with finite radius. The total fluence rate along the depth in tissues was computed by adding the collimated and the diffuse components. The analytical solution was also used to study the effect of the beam radius on the light attenuation. Measurements were performed using a tank filled with a liquid-simulating medium (Milk), illuminated with a LED array (660 nm, 100mm×100mm). Several circular diaphragms were used to obtain uniform circular beams with well defined radii. An optical fibre (with an isotropic tip) was used to measure the fluence rate inside the medium. Preliminary experimental results are in agreement with theoretical predictions.

Files in this item

Name:
LAMPA_SPIE_ASKOURA_2015.pdf
Size:
401.5Kb
Format:
PDF
View/Open

Collections

  • Laboratoire Angevin de Mécanique, Procédés et InnovAtion (LAMPA)

Related items

Showing items related by title, author, creator and subject.

  • Analyse théorique et expérimentale de la diffusion de la lumière générée par une diode électroluminescente dans des répliques tissulaires 
    LE POMMELLEC, Jean-Yves; L'HUILLIER, Jean-Pierre (ELSEVIER, 2011)
    The knowledge of the spatial distribution of light within a biological tissue exited by a light source (LASER or LED) is fundamental to achieve optimal photodynamic treatment. In this paper, we develop an analytical model ...
  • Assessment of tissue optical parameters in a spherical geometry using three different optical spectroscopy methods: comparison based on a theoretical approach 
    VAUDELLE, Fabrice; ASKOURA, Mohamed-Lamine; L'HUILLIER, Jean-Pierre (The Society of Photo-Optical Instrumentation Engineers (SPIE), 2015)
    The non-invasive research of information inside the biological tissues can be made by means of continuous, time dependent or frequency modulated light source, emitting in the visible or infrared range. Moreover, the ...
  • Time-resolved optical fluorescence spectroscopy of heterogeneous turbid media with special emphasis on brain tissue structures including diseased regions: A sensitivity analysis 
    VAUDELLE, Fabrice; L'HUILLIER, Jean-Pierre (ELSEVIER, 2013)
    Fluorescence-enhanced optical imaging based on near-infrared light provides a promising tool to differentiate diseased lesions from normal tissue. However, the measurement sensitivity of the fluorescence signals acquired ...
  • Influence of the size and skin thickness of apple varieties on the retrieval of internal optical properties using Vis/NIR spectroscopy: A Monte Carlo-based study 
    VAUDELLE, Fabrice; L'HUILLIER, Jean-Pierre (Elsevier, 2015)
    Visible/near-infrared spectroscopy is a well-established method to measure optical properties of tissues, assuming that a light propagation model can be used to recover absorption and reduced scattering coefficients from ...
  • Force et ascension capillaires sur une bille partie 1 : détermination de la tension de surface 
    CHAMPMARTIN, Stéphane; AMBARI, Abdelhak; LE POMMELLEC, Jean-Yves (Congrès de Mécanique du Maroc, 2015)
    Les interactions entre un liquide et une surface solide sont des plus courantes dans notre environnement quotidien : enduction, imprégnation, évaporation, galvanisation, traitements des surface… [1]. La caractérisation de ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales