Link between the laws of geometrical optics and the radiative transfer equation in media with a spatially varying refractive index

Details Link between the laws of geometrical optics and the radiative transfer equation in media with a spatially varying refractive index Link between the laws of geometrical optics and the radiative transfer equation in media with a spatially varying refractive index

2007-12-12

arxiv.org/abs/0712.1902v1

Optics Communications 281, 14 (2008) 3631-3635

Physics

Optics

14 pages, 3 figures

Scientific paper

10.1016/j.optcom.2008.03.048

We proposed in a previous paper [Opt. Commun. 228, 33 (2003)] a modified radiative transfer equation to describe radiative transfer in a medium with a spatially varying refractive index. The present paper is devoted to the demonstration that this equation perfectly works in the non-absorbing / non-scattering limit, what was contested by L. Mart\'i-L\'opez and coworkers [Opt. Commun. 266, 44 (2006)]. The assertion that this equation would imply a zero divergence of the rays is also commented.

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