METHOD AND DEVICE FOR DISPLAYING AND DIGITALLY CODING AND VISUALIZING COLOURS BY SUBTRACTIVE TRICHROMATIC SYNTHESIS

摘要

According to the device, is superimposed three movable members each carrying a series of density gradations in each of the primary subtractive colors, each density gradation being accompanied by a number, or an identification symbol. It becomes possible to reconstruct a specific color from a defined assembly numbers, or symbols, provided that the light source is of consistent quality. The movable elements may consist of concentric cylinders, stacked discs, or circulating endless belts one above the other on the rolls, or plates of transparent material carrying a color gradation and controlled by slides under caches .