Abstract:
A light source system comprising a projection lens, which is capable of producing a far-field image of a light source. The light source comprises a photoluminescent material that when illuminated by light from laser emitters of a first waveband emits light of a second or more wavebands of longer wavelength. The resulting light emission produces a colour perceived as white. The light source is illuminated by a plurality of laser emitters arranged to illuminate the light source in an array-like manner from the front side. Control of the output of one or more of the laser emitters results in a variation of the spatial emission distribution from the light source and hence a variation of the far-field beam spot distribution via non-mechanical means. An optical system is arranged to image light emitted from the photoluminescent material into the far-field, which optical system comprises a converging lens.
Abstract:
A light source system operable in at least first and second modes to provide at least and first and second different far field illumination patterns, the system comprising: a photoluminescent material; and a light beam generator for generating, in the first mode, a first set of light beams for illuminating respective first regions of the photoluminescent material and for generating, in the second mode, a second set of light beams for illuminating respective second regions of the photoluminescent material, the first and second sets of light beams being independently controllable. In the first mode, the light beam generator generates the first set of light beams such that a first beam of the first set of light beams illuminates a first illumination region of the photoluminescent material having one side that is inclined with respect to another side of the illumination region.
Abstract:
A light source system comprising projection optics, which are capable of producing a far-field image of a light source. The light source comprises a fluorescent medium that when illuminated by light from laser emitters of a first waveband emits light of a second or more wavebands of longer wavelength. The resulting light emission produces a colour perceived as white. The light source is illuminated by a plurality of laser emitters arranged to illuminate the light source in an array-like manner. Control of the output of one or more of the laser emitters results in a variation of the spatial emission distribution from the light source and hence a variation of the far-field beam spot distribution. Further, fine variation of the far-field beam spot distribution may be achieved by re-direction of the laser beams by separate control methods.