Surface Multi-spectral BRDF And Chromaticity Characteristic Of Target Coatings

This dissertation mainly studies on spectrum characteristic and chromaticity characteristic of target samples in the bands of visible light. Based on the theory of color and light scattering, the two methods to obtain the color characteristic of target samples are discussed by the Hemispherical Reflectance and BRDF. The angle distributions of chromaticity and luminance characteristic are researched with BRDF deeply. The five-Parameter BRDF model is extended into visible band. Models and 3D distribution of radiation luminance of target surfaces are obtained. The influence rule of chromaticity characteristic is discussed, which changes regularly with different incidence angles and thickness. It is analysed reflectivity on chromaticity characteristic of the color film in different domains of the visible light bands. The effect of light source on color characteristic of target samples is studied, as well as correlative color temperature phenomenon. A program method and empirical equation based on GSAA for correlated color temperature are presented.