Light emitting diode with multifaceted reflector to increase coupling efficiency and alignment tolerance
Freund, Robert S
Watts, Roderick K
Wetzel, Robert C
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Citation (published version)Greg Blonder, Robert S Freund, Roderick K Watts, Robert C Wetzel. "Light emitting diode with multifaceted reflector to increase coupling efficiency and alignment tolerance." U.S. Patent 5,101,454-A.
A light source, such as an LED, is provided with a multifaceted reflector to facilitate coupling of emitted light into an optical waveguide such as an optical fiber. In a preferred embodiment, a conventional LED fabricated on one side of a transparent substrate is provided with a series of integral concentric reflecting rings on the opposite side of the substrate. The rings reflect light diverging from the LED toward the central axis of an optical fiber light.