An optical system is usable to form an illuminating strip on a surface of a material. The optical system includes an illuminating device which contains several light sources which are located at a distance from the surface of the material. The illuminating device uses its light sources to generate the...http://www.google.fr/patents/US7682040?utm_source=gb-gplus-shareBrevet US7682040 - Optical system for creating an illuminated strip
