Determination of radiative properties of fibrous media by an inverse method—comparison with the Mie theory

In this paper, we present an inverse method based on experimental measurements of bidirectional reflection and transmission (BRDF and BTDF). Silica wool samples are studied by using an optic spectroscopy apparatus comprising a goniometric device and a grating monochromator. The inverse method allows...

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Bibliographic Details
Published in:Journal of quantitative spectroscopy & radiative transfer 2002-09, Vol.74 (5), p.637-653
Main Authors: Milandri, A., Asllanaj, F., Jeandel, G.
Format: Article
Language:English
Subjects:
Albedo
Engineering Sciences
Fibrous
Henyey and Greenstein
Inverse method
Optic spectroscopy
Optical thickness
Phase function
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Summary:In this paper, we present an inverse method based on experimental measurements of bidirectional reflection and transmission (BRDF and BTDF). Silica wool samples are studied by using an optic spectroscopy apparatus comprising a goniometric device and a grating monochromator. The inverse method allows, by means of a least-squares model, the determination of the radiative properties of the medium: albedo, optical thickness and phase function coefficients. A new phase function model taking into account Henyey and Greenstein functions associated with a Lorentz function is used. Our results achieved with the inverse method are compared to those obtained by the Mie theory.
ISSN:0022-4073
1879-1352
DOI:10.1016/S0022-4073(01)00276-X