Laser-phosphor light source with improved lifetime

Abstract

The invention provides a light generating system () comprising a first light generating arrangement (), a second light generating arrangement (), a luminescent element (), a diffuser element (), a beam direction control system (), and a control system (), wherein: (A) the first light generating arrangement () is configured to generate a first beam (B1) of first device light (), wherein the first light generating arrangement () comprises a first solid state laser light source (); (B) the second light generating arrangement () is configured to generate a second beam (B2) of second device light (), wherein the second light generating arrangement () comprises a second solid state laser light source (); (C) the luminescent element () comprises a luminescent material (), wherein the luminescent material () is able to convert the firstdevice light () and/or the second device light () received by the luminescent material () into luminescent material light (); (D) the diffuser element () is configured to diffuse first device light () and/or the second device light () received by the diffuser element (), thereby providing diffused light (); (E) the beam direction control system () is configured in a light receiving relationship with the first light generating arrangement () and the second light generating arrangement (); (G) the control system () is configured to control the first light generating arrangement (), the second light generating arrangement (), and the beam direction control system (); and (H) the light generating system () is configured to generate (white) system light ().