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The pBRDF model is able to relate the properties of target materials to the polarization information of incident and reflected light, and is an important basis for obtaining polarization information of targets in space. It is an important basis for obtaining target polarization information and polarization detection of space targets. P-G model is t...
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This work presents a complete Mueller matrix imaging polarimeter that uses three liquid-crystal retarders and a pixelated polarization camera. The polarimeter is characterized and optimized with a standard correction procedure here adapted to be performed fully in-situ, without any additional element, based on considering the polarization camera as...
Citations
... Fu et al. 16 established pBRDF for iron plates, glass plates, sod plates, and green-painted iron plates, which associated Fresnel equation with the complex index of refraction but did not further explore the polarization spectral characteristics of the four targets. Based on the P-G model, Sun et al. 17 introduced scattering and phase functions to optimize the model and carried out multi-angle polarization measurement experiments on dark green coated aluminium. Based on the existing P-G model and parameter ...
... (9)(10)(11)(12)(13)(14)(15)(16). Here, The complex refractive index n can be regarded as function of wavelength and dispersion constant D, so the specific expression of matrix elements is as follows: (17)(18)(19)(20), the Mueller matrix elements M ij (θ i , θ r , φ, , D) containing wavelength variable and the dispersion constants can be deduced 22 . ...
The polarized bidirectional reflectance distribution function (pBRDF) can describe the changes between the Stokes vectors of incident and reflected light. The existing model can only describe the spatial distribution of the target’s polarization characteristics at a single wavelength, so further research is needed for the description of the target’s polarized spectral characteristics. In this paper, a modified three-component polarized spectral bidirectional reflectance distribution function (pSBRDF) is proposed, which combines Fresnel equation in the specular reflection component with Cauchy’s empirical dispersion equation, by introducing the wavelength variable and dispersion constants that do not change with wavelength. The degree of the linear polarization (DoLP) of two types of coated fabric samples was measured at three incident angles and 400 to 760 nm wavelength. The error of the model in describing the spectral and the spatial distribution of DoLP are controlled within 0.00743 and 0.0757 respectively, which proves the accuracy of the model. This research provides the model basis for analysis of the target’s polarization characteristics and the theoretical basis for the application of polarization detection.
