Patent ID: 8915612

Claim:
An illumination system for spot illumination comprising: a tubular reflector with a reflective inner surface, said tubular reflector having an entrance aperture, and an exit aperture being larger than the entrance aperture; and a light-source array comprising a plurality of light-sources arranged in a physical light-source configuration to emit light into the tubular reflector at the entrance aperture thereof, wherein said tubular reflector comprises an uneven number of reflective surfaces each being arranged to provide a primary mirror image of said light-source array, said primary mirror image having a primary mirror image light-source configuration; and wherein said light-source array is configured in such a way that, for each of said primary mirror images, at least half of all secondary mirror images of said light-source array resulting from reflection of said primary mirror image by said reflective surfaces exhibit secondary mirror image light-source configurations that are different from said physical light-source configuration.