Illumination device with optimized light extracting surface

摘要

The light rays discharged from the undivided light-emission surface of a light source (1) has a total radiation output which is equal to the total radiation output of the non-coherent light discharged from the multiple partial surfaces of the light-emission surface. The incidence angle with respect to the re-combination surface (5) of LED chip (4) is smaller than the total reflection angle of the element.