Patent ID: 7688526

Claim:
A light-emitting assembly comprising a lens, a first optical source, a second optical source and a third optical source, said lens being disposed forward of said first, second and third optical sources, said third optical source being intermediate said first and second optical sources; and said lens and said first, second and third optical sources being arranged so that light emitted from said first and second optical sources merges at said third optical source after undergoing internal reflection at said lens and said light is forwardly transmitted after mixing with light of said third optical source; said lens comprises a first concave portion and a second concave portion, said first concave portion being configured for reflecting light from said first optical source back towards said third optical source, and said second concave portion being configured for reflecting light from said second optical source back towards said third optical source; said first concave portion forming part of a first ellipse, and said first and third optical sources being located at the foci of said first ellipse; said second concave portion forms part of a second ellipse, and said second and third optical sources are located at the foci of said second ellipse; wherein said first and second ellipses intersect, and said third optical source being located at a common foci of both said first and second ellipses.