The Polarization Characteristics Of The Rock Surface Reflectance Spectra

The traditional Remote Sensing can only consideration the surface reflectance of the electromagnetic radiation intensity size, it will lose a lot of information. Polarization remote sensing focused on the target objects electromagnetic waves that radiation intensity, direction, polarization state information, and its a useful complement to traditional remote sensing, human can get more information of features from polarization remote sensing. The inversion and interpretation of the physical properties of the target objects by exploring the polarization properties of the reflected light. For example, the relationship of the refractive index and density formula was first proposed as early as the beginning of the18th century by Newton, and the functional relationship between the degree of polarization and the refractive index of the substance can be derived. This theoretically implies that the remote sensing without the need for direct contact with the rock minerals you can get like the physical characteristics of the refractive index and density. The research topic of this article is the polarization characteristics of the rock surface reflectance spectra.The main work was to study the degree of polarization of the material, the refractive index of the relationship between the light incident angle and density, and then explore the relationship of the degree of polarization of the substance with the density of the material, To seek out a degree of polarization surface of the reflected light through the material in order to explore the new method of the density of that substance. Through multi-angle polarized reflectance spectrometer and the miniature fiber optic spectrometer to measure the rock samples, get polarized reflectance spectra of rock,Analysis the polarized reflectance spectrum of the of rock variation with angle variation, take the angle information and the polarization information into the formula, calculated density, to compare the density that get by actually measuring, to verify the applicability and error range of the derivation formula. Specifically, we draw the following conclusions:(1)Through comparative analysis of the three refractive formulas Gladstone—Dyer, Lorenz—Lorentz and Alen refraction, The Gladstone—Dyer formula with respect to the other two formulas have better accuracy and applicability.(2)In accordance with fresnel formulas and the rocks of the law of refraction.The formula shows that the degree of polarization and the refractive index of the substance and the incident angle of the light have attachment.(3) Through simultaneous Gladstone—Dyer and Lorenz—Dorentz formula can calculate the Refractive index, take n=(7+(?)33)/8into the original equation to find the earth’s surface density of approximately2.824g/cm3. The result with the earth ellipsoid housing density2.9by Buren given in good agreement. Prove take k value of0.21in Gladstone—Dyer formula is appropriate.(4)Replace the refractive index in the above to the N from Gladstone-Dyer formula and get the relationship between the degree of polarization and the density of the material.Through experiments to obtain several rock polarized reflectance spectral data and density, the degree of polarization into the above equation, calculate the density of the rock sample, for the result with the actual measurement was basically the same. This indicates that, by given the size of the degree of polarization the rock surface density is obtained feasible.