Figure 3

Mean of the CIE x values for two perpendicular directions (line-by-line and column-by-column averaging) of the data matrix as a function of the pixel number. The globe-top is assumed to have a radius of 1 mm and the substrate surface to have a diffuse (left side, a-c) or specular (middle, d-f) reflectivity of 85% (top, for which the phosphor concentration is adjusted in order to achieve a CIE x value of about 0.3300 in case of a diffuse reflectivity), 70% (middle) and 100% (bottom). The images in the right side (g-i) show the differences for the diffuse and specular graphs given in the left and the middle columns.