Patent ID: 7510316

Claim:
An illumination system comprising: a light guide having an entrance face, an exit face and an aperture in which a light source can be arranged, wherein the entrance face and exit of the light guide are opposite to and in parallel with each other; a light reflective structure arranged in proximity to the light guide entrance face, the light reflective structure being arranged with an aperture in which the light source can be fitted; and a first light refractive structure arranged in proximity to the light guide exit face, in which first light refractive structure: all light beams incident upon the first light refractive structure from a side of the light refractive structure closest to the entrance face and at a first angular interval with respect to the optical axis of the system are refracted to illuminate the light guide exit face, and all light beams incident upon the first light refractive structure from a side of the light refractive structure closest to the entrance face and at a second angular interval with respect to said optical axis are reflected to be recycled in the light guide.