Lighting Device Having a 3D Scattering Element and Optical Extractor With Convex Output Surface

A lighting device comprising:

• one or more light-emitting elements (LEEs) configured to provide pump light;
• a scattering element comprising a matrix of phosphor embedded in dielectric material, wherein the phosphor is configured to absorb at least a portion of the pump light and to emit converted light with converted light wavelengths longer than pump light wavelengths, and the dielectric material is transparent to the pump light and the converted light, the scattering element forming an input interface with the LEEs, such that the pump light emitted by the LEEs is input into the scattering element through the input interface, wherein the input interface has a first dimension, and wherein the scattering element has a second dimension orthogonal to and 1-10 times larger than the first dimension;
• and
• an optical extractor forming an extraction interface with the scattering element, such that mixed light from the scattering element is input into the optical extractor through the extraction interface, wherein an output surface of the optical extractor is arranged and shaped relative to the extraction interface such that the mixed light received by the optical extractor through the extraction interface impinges on the output surface at incident angles smaller than or equal to the critical angle θC=arcsin(nE/nO), wherein nE is a refractive index of the optical extractor and nO is a refraction index of an environment surrounding the optical extractor.