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Investigation of human skin collagen distribution in response to polarized laser by ellipsometry

Fattahi, H ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. Publisher: 2008
  3. Abstract:
  4. The important role of collagen fibers in LILT has been observed. However there is still unclear information about light characteristics, such as coherence and polarization. Collagens behavior in response to different polarization is presented in this study. We investigate the distribution and structure of collagen bundles in full-thickness human skin in response to laser with different polarization by ellipsometry technique. For this study, we chose skin from the back part of a white man. The light source is HeNe laser. Samples are irradiated by three different polarizations. Sample S is irradiated using the electric field vector of the polarized laser radiation aligned in parallel with the human's spinal column direction. Sample S± is irradiated using the electric field vector of the polarized laser radiation aligned perpendicularly to the aforementioned orientation. Sample S o is irradiated using circularly polarized laser. Sample C is not irradiated and consider as a control. Our findings indicate that the Sample S shows higher birefringence. In comparison with other polarizations this amount is closer to sample C. Birefringence in sample S o is higher than sample S⊥. Also by increasing the time duration of irradiation, the birefringence is decreasing which indicates more collagen denaturation
  5. Keywords:
  6. Circularly polarized lasers ; Collagen denaturations ; Collagen fibers ; Electric field vectors ; HeNe laser ; Human skins ; Polarized lasers ; Spinal columns ; Time durations ; Biomedical engineering ; Birefringence ; Collagen ; Electric field effects ; Ellipsometry ; Laser radiation ; Light ; Light polarization ; Lighting ; Polarization ; Skin ; Lasers
  7. Source: Proceedings of the 6th IASTED International Conference on Biomedical Engineering, BioMED 2008, 13 February 2008 through 15 February 2008, Innsbruck ; 2008 , Pages 307-312 ; 9780889867215 (ISBN)
  8. URL: https://www.actapress.com/PaperInfo.aspx?paperId=43932