Laser-phosphor engine with rotating converter

A light generating system comprising (i) one or more light generating devices, (ii) a first luminescent material, (iii) a reflector, (iv) a rotatable element, (v) a control system and (vi) central optics;

• wherein:
• the one or more light generating devices are configured to generate device light;
• wherein the one or more light generating devices comprise one or more of a laser diode and a superluminescent diode;
• the first luminescent material is configured to convert at least part of the device light received by the first luminescent material into first luminescent material light;
• the reflector is configured to reflect at least part of the device light received by the reflector into reflected device light;
• the rotatable element comprises a first ring-shaped section, and a second a ring-shaped section;
• the first luminescent material is comprised by at least part of the first ring-shaped section;
• and the reflector is comprised by at least part of the second ring-shaped section;
• the light generating system is configured such that (a) in an operational mode of the light generating system the rotatable element rotates, such that over time different parts of the first ring-shaped section and/or different parts of the second ring-shaped section are irradiated by the device light, and (b) a distribution of the device light over the first ring-shaped section and the second ring-shaped section is optically controllable;
• and wherein the light generating system is configured to generate system light comprising one or more of the first luminescent material light and the reflected device light;
• the control system is configured to control a spectral power distribution of the system light by optically controlling the distribution of the device light over the first ring-shaped section and the second ring-shaped section;
• the one or more light generating devices are configured to generate polarized device light having a controllable polarization;
• the central optics comprises (i) a central optics polarizing beam splitter, and (ii) a central optics dichroic beam splitter;
• wherein:
• the central optics polarizing beam splitter is configured to transmit and/or reflect at least part of the device light in dependence of its polarization;
• the central optics dichroic beam splitter is configured to transmit and/or reflect at least part of the device light, at least part of the first luminescent material light, in dependence of their spectral power distributions;
• the light generating system is configured such that (a) at least part of the device light, when having a first polarization, propagates from the one or more light generating devices via the central optics to the first ring-shaped section to provide the first luminescent material light, (b) at least part of the device light, when having a second polarization, different from the first polarization, propagates from the one or more light generating devices via the central optics to the second ring-shaped section to provide the reflected device light, and (c) at least part of the first luminescent material light generated by the first luminescent material and at least part of the reflected device light generated at the reflector, escape from the light generating system via the central optics;
• the control system is configured to control the polarization of the device light;
• and
• the light generating system is configured to generate system light comprising one or more of (i) the first luminescent material light and (ii) the reflected device light.