An illumination system has individual light emitting diodes (LEDs) that are optically coupled via reflective couplers to respective optical fibers. The respective optical fibers may then be bundled. The shape of the reflective coupler may be selected to increase the coupling efficiency between the LED...http://www.google.com/patents/US7403680?utm_source=gb-gplus-sharePatent US7403680 - Reflective light coupler
