Surface light guide and planar emitter

A planar emitter comprising:

• a first surface light guide;
• a second surface light guide;
• and
• at least one radiation source, wherein radiation coupled into the first surface light guide during operation of the planar emitter is generated by the radiation source and wherein the radiation coupled into the second surface light guide during operation of the planar emitter is generated by the radiation source;
• wherein the first surface light guide comprises:
• a radiation exit area running along a main extension plane of the surface light guide and being provided for laterally coupling in the radiation;
• scattering locations for scattering the coupled-in radiation;
• a first interface and a second interface, which delimit light guidance of the coupled-in radiation in a vertical direction;
• and
• a first layer and a second layer formed one on top of the other in the vertical direction between the first interface and the second interface.

A surface light guide, comprising:

• a radiation exit area running along a main extension plane of the surface light guide and being provided for laterally coupling in radiation;
• scattering locations for scattering the coupled-in radiation;
• a first interface and a second interface, which delimit light guidance of the coupled-in radiation in a vertical direction;
• a first layer and a second layer formed one on top of the other in the vertical direction between the first interface and the second interface;
• and
• a further layer arranged on that side of the first layer that faces away from the second layer, wherein the first layer has a higher refractive index than the second layer and the further layer, wherein the surface light guide is provided for coupling in radiation having a first radiation component and a second radiation component.