Patent ID: 7329977

Claim:
A light guide system for use in an automotive lighting system, the light guide system at least comprising a light source, further comprising a discharge lamp having a reflector and a burner, the reflector at least comprising a reflective contour and a hollow reflector neck, the burner being arranged in centered manner in the reflector and the reflector and a lower part of the burner being connected firmly together by a mechanical fastening unit for fixing the burner into a defined position relative to the reflector to ensure optimum luminosity by exhibiting play in a direction coincident with the average light emission from the lamp and in a plane orthogonal to said coincident direction wherein the mechanical fastening unit comprises at least: a cap, attached to the hollow reflector neck to enclose a portion of the hollow reflector neck, the cap being substantially conformed to the shape of the hollow reflector neck, the cap having a bearing surface which is arranged substantially perpendicular to a longitudional axis of the lamp, a collar, rigidly connected to the lower part of the burner, and a sliding disk, resting on said bearing surface of said cap, the sliding disk being comprised of a flat plate including a first aperture and a second aperture and four guide aids rigidly connected to the flat plate arranged in mutually opposing pairs, the first aperture conformed to the shape of the collar for allowing passage with play of the collar arranged on the lower part of the burner, the second aperture being conformed to the shape of the return terminal for allowing passage of the return terminal, the sliding disk being displaceable in the x and y directions on the bearing surface of the cap for fixing the burner into said defined position relative to the reflector to ensure optimum luminosity.