LEUCHTDIODE MIT EINER STRAHLFORMUNGSVORRICHTUNG ZUR HINTERGRUNDBELEUCHTUNG EINER INSTRUMENTENTAFEL

摘要

A lighting device comprises a substantially plane substrate (1) and one or more semiconductor LED light sources or chip-LEDs (2) distributed over the substrate (2) and electrically connected to conductive supply paths. Associated to each source (2) is a primary optical system (5) designed to refract the light emitted by the source so as to produce a substantially uniform illumination on a plane (P-P) substantially parallel to said substrate (1) and set at a predetermined distance (D) therefrom. Provided in the proximity of said plane (P-P) is a secondary optical system (6) for controlling the divergence of the rays of light emitted by the source and refracted by the primary optical system (5). It is thus possible to obtain a substantially uniform outcoming beam with a predetermined illuminance profile, for example a very collimated one, with a device having a very contained thickness.