Patent ID: 6947620

Claim:
An optoelectromc coupler, with two photodiodes and an optic light guide, with one of the two photodiodes serving as the transmitting diode and the other as the receiving diode and the light guide serving to guide the light emitted by the transmitting diode to the receiving diode by total reflection, wherein the transmitting diode and the receiving diode are mounted on a circuit board at a distance from each other and the light guide is a plastic or glass element that is mounted on the same circuit board, wherein the light guide is mounted on the circuit board between the transmitting diode and the receiving diode and at least partially covers the transmitting diode and the receiving diode, wherein the light-emitting surface of the transmitting diode and/or the light-receiving surface of the receiving diode point upward away from the circuit board, and wherein the boundary surfaces of the light guide which are responsible for the total reflection are curvilinear and the central section of the light guide between these surfaces is planar.