Validity conditions for the radiative transfer equation
We compare the radiative transfer equation for media with constant refractive index with the radiative transfer equation for media with spatially varying refractive indices [J. Opt. A Pure App. Opt. 1, L1 (1999)] and obtain approximate conditions under which the former equation is accurate for model...
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| Veröffentlicht in: | Journal of the Optical Society of America. A, Optics, image science, and vision Optics, image science, and vision, 2003-11, Vol.20 (11), p.2046-2056 |
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| container_issue | 11 |
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| container_title | Journal of the Optical Society of America. A, Optics, image science, and vision |
| container_volume | 20 |
| creator | Martí-López, Luis Bouza-Domínguez, Jorge Hebden, Jeremy C Arridge, Simon R Martínez-Celorio, René A |
| description | We compare the radiative transfer equation for media with constant refractive index with the radiative transfer equation for media with spatially varying refractive indices [J. Opt. A Pure App. Opt. 1, L1 (1999)] and obtain approximate conditions under which the former equation is accurate for modeling light propagation in scattering media with spatially varying refractive indices. These conditions impose restrictions on the variations of the refractive index, the gradient of the refractive index, the divergence of the rays, the frequency of modulation, and the widths of light pulses, which are related to the mean refractive index, the absorption coefficient, and the reduced scattering coefficient of the medium. Each condition is geometrically interpreted. Some implications of the results are discussed. |
| doi_str_mv | 10.1364/JOSAA.20.002046 |
| format | Article |
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| ispartof | Journal of the Optical Society of America. A, Optics, image science, and vision, 2003-11, Vol.20 (11), p.2046-2056 |
| issn | 1084-7529 1520-8532 |
| language | eng |
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| source | MEDLINE; Optica Publishing Group Journals |
| subjects | Light Models, Theoretical Refractometry Scattering, Radiation Tomography, Optical |
| title | Validity conditions for the radiative transfer equation |
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