Evaluation of the shape of the specular peak for high glossy surfaces

摘要: Gloss is the second most relevant visual attribute of a surface beside its colour. While colour originates from the wavelength repartition reflected light, gloss angular distribution. When an observer asked to evaluate surface, he always first orientate his eyes along specular direction before lightly tilting the examined sample. This means that located in and around direction, peak called the specular peak. On one hand, this flat broad on matte surfaces other it narrow sharp on high surfaces. For late ones, FWHM less than 2° which can be quite difficult to measure. We developed dedicated facility capable measuring with up to 0,1 °. measured the evolution according angle illumination sample restricted field of very glossy surface. The peaks measured are presented paper. next step will identify the correlations between roughness