Lighting Typical devices that enhance the brightness of the wavelength converting element is disclosed. In the illumination device, in order to receive light from the light source in the first wavelength range, and includes a wavelength converting element that can act to convert into a second wavelength range of the light. Said wavelength conversion element comprises a second surface opposite to the first surface, the first surface, and side edges extending between the first surface and the second surface above. In the vicinity of the side edge portion of the wavelength converting element, reflective optical elements are to be placed. The reflective optical element is configured to reflect back towards the wavelength converting element light at a first wavelength range above at least. [Selection Figure Figure 4波長変換要素の輝度を増進する代表的な照明デバイスが開示される。上記照明デバイスは、第1波長範囲における光源からの光を受容すべく、且つ、上記光を第2波長範囲へと変換すべく作用可能な波長変換要素を含む。上記波長変換要素は、第1面と、該第1面とは逆側の第2面と、上記第1面および第2面の間に延在する側縁部とを含む。上記波長変換要素の上記側縁部の近傍には、反射的光学要素が配置される。上記反射的光学要素は、少なくとも上記第1波長範囲における光を上記波長変換要素に向けて戻し反射すべく構成される。【選択図】図4
