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Retinal cells scattered body of the light source polarization

Author: HeJun
Tutor: GaoZhiShan
School: Nanjing University of Technology and Engineering
Course: Optical Engineering
Keywords: Scattering Radiative transfer theory Optical polarization resistance Static structure factor
CLC: R318.51
Type: Master's thesis
Year: 2012
Downloads: 7
Quote: 0
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Abstract


The retina of the human eye is a high- scattering properties of biological tissues . Clinical ophthalmology that internal features of retinal tissue changes can provide intuitive and detailed basis for clinical diagnosis and treatment of retinopathy organizations , such as diabetic retinopathy , macular degeneration , retinitis pigmentosa and other . Photon transmission mechanism in retinal tissue for analysis , to extract the parameters of the internal characteristics of the diseased tissue necessary to support the theory , the results available for the diagnosis of clinical ophthalmology . Retinal fundus camera , optical coherence tomography instrument , scattering spectrometer detection equipment research object , therefore the analysis of retinal tissue scattering properties will contribute to the improvement of the of these detection equipment or methods . Based on Mie scattering theory , the study of the three single - particle scattering efficiency factor , the parameters of albedo , anisotropy factor , and the mathematical relationship of the parameters ; combined radiative transfer theory of multiple scattering of the beam in the retinal tissue ; and on this basis , to discuss the different particles (including the influence of particle size , concentration, and shape factor) on the polarization of the scattered light . Finally, according to the anatomical structure of the retina and cell characteristics of the distribution , the introduction of molecular dynamics field static structure factor correction radiative transfer theory and the generalized spherical harmonic function method for solving visual cells scattered light polarization . The results show that the polarization of the scattered light depends on factors such as particle size of the scattering particles , the concentration distribution , and cell shape . The retina as the object of study, in the different position of the polar angle and the optical path can be detected to partially polarized light or linearly polarized light , the scattered light beam of the polarizing rendered fluctuated , the scattered light beam changes in the polarization properties of the scattering angle increases . Consider only the concentration distribution of visual cells , cone cells than rod cells having a stronger scattering characteristics ; joining the consideration of the shape factor , rod cells having a stronger scattering characteristics .

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