An edge-lighting type light diffuser is disclosed which has a plane of light incidence, a light transmitting means and a plane of light emission. The light transmitting means is composed of a laminate of a plurality of light-transmissible plates. This structure provides a light diffuser capable of uniform...http://www.google.fr/patents/US4642736?utm_source=gb-gplus-shareBrevet US4642736 - Light diffuser
