Patent ID: 7465080

Claim:
An optical waveguide system comprising at least one discharge lamp optically coupled to a waveguide, the discharge lamp having a reflector and an asymmetrical burner, the reflector comprising at least a reflecting surface and a hollow reflector neck, the asymmetrical burner being partly arranged in the hollow reflector neck without making contact therewith, the shape and the size of an inner contour of the reflecting surface of the reflector corresponding substantially to a contour of the asymmetrical burner, the asymmetrical burner being centrally located in the reflector, wherein the reflecting surface of the reflector has a substantially oval asymmetrical shape corresponding substantially to the contour of the asymmetrical burner and a return pole, the shape and size of the inner contour of the reflecting surface being symmetrical in an x-direction and asymmetrical in a y-direction in a cross-sectional view of the hollow reflector neck and orthogonal to the reflector axis, and the asymmetry in the y-direction preventing rotation of the asymmetrical burner in the hollow reflector neck and increasing a reflective surface area of the hollow reflector neck thereby increasing the light output efficiency.