Constant power tunable cct laser-phosphor source comprising three laser banks

Abstract

The invention provides a light generating system (1000) comprising light generating devices (110,120,130), a luminescent material (210), a control system (300), redirection optics (510), a diffuser system (1710), and a light exit (1090); wherein: (A) (i) a first light generating device (110) is configured to provide first device light (111) having a first centroid wavelength (λc1), (ii) a second light generating device (120) is configured to provide second device light (121) having a second centroid wavelength (λc2), and (iii) a third light generating device (130) is configured to provide third device light (131) having a third centroid wavelength (λc3); wherein λc3≠λc1 and λc3≠λc2; wherein the first device light (111), the second device light (121), and the third device light (131) reaching the redirection optics (510) comprise linear polarized light; (B) the luminescent material (210) is configured to convert at least part of device light into luminescent material light (201): (C) the diffuser system (1710) is configured to diffuse at least part of the third device light (131) received by the diffuser system (1710) into diffused device light (711); (D) the redirection optics (510) comprise (a) a first polarizing beam splitter is configured to combine the first device light (111) and the second device light (121); (b) one or more further polarizing beam splitters configured to (a) direct third device light (131) in an optical path to the luminescent element (200) and in an optical path to the diffuser system (1710) in dependence of the linear polarization of the third device light (131), and (ii) split third device light (131) propagating to the diffuser system (1710) from diffused device light (711) emanating from the diffuser system (1710); (c)one or more dichroic based redirection optics are configured to (a) direct the combined device light (116) and at least part of the third device light (131), received from the first polarizing beam splitter to the luminescent element (200), (ii) split the combined device light (116) from the luminescent material light (201), and (iii) direct the luminescent material light (201) and the diffused device light (711) to the light exit (1090); (E) the light generating system (1000) is configured to generate in an operational mode system light (1001) comprising at least part of the luminescent material light (201) and at least part of the diffused light (711), and wherein the system light (1001) is white light; and (F) the control system (300) is configured to control a spectral power distribution of the system light (1001).

Description

[0001]2023PF80436 1 CONSTANT POWER TUNABLE CCT LASER-PHOSPHOR SOURCE COMPRISING THREE LASER BANKS FIELD OF THE INVENTION The invention relates to a light generating system. The invention further relates to a lighting device comprising the light generating system. BACKGROUND OF THE INVENTION Laser-phosphor based lighting fixtures are known in the art. For instance, WO2022143318 describes a light emitting device, comprising a first light source, a second light source, a dichroic mirror, a wavelength conversion apparatus, a first light path adjustingapparatus or a second light path adjusting apparatus, and a first scattering optical system. Thelight mixing effect of emergent light can be improved by using the first scattering optical system. Light emitted by the first light source is all used for exciting the wavelength conversion apparatus. SUMMARY OF THE INVENTION High brightness light sources can be used in various applications including spots, stage-lighting, headlamps, home and office lighting, and automotive lighting. For this purpose, laser-phosphor technology can be used, wherein a laser provides laser light and aremote phosphor converts laser light into converted light. A relatively straightforward way toproduce white light using lasers is to use (blue) laser light in combination with a (yellow) phosphor to generate phosphor converted light. Laser-phosphor systems may allow generation of high brightness light and may therefore be used in projection systems, including displays such as cinema projectors and projectors for home, school, and office applications, car front lighting, search lighting, stage lighting, architectural lighting, and special lighting applications. In general, a laser-phosphor light engine may be capable to generate only a single color point as defined by the luminescent converter. Creation of a product range providing different color points may be costly as it requires multiple unique components to be designed, qualified, produced, and kept in stock. In other cases, e.g. in RGB LCD-based projection systems, the maximum brightness is limited by the components 2023PF80436 2 used, the engine volume is large due to the many components, and the system cost are high due to the many dedicated components. A way to combine pump light and luminescent light may be to use a polarizing beam splitter for the pump light, by which part of the light is reflected to the luminescent material and part is transmitted to a diffuser. However, in general the diffused light may to a large degree be depolarized, which may result in relatively high losses of diffused blue light at a beam combiner where it is combined with the luminescent light into white output light. In many laser-based light engine designs the effective usage of the laser light sources, in case there is more than one source, may depend on the light source design (what is the maximum output of the sources used) versus the targeted output white light color point. There may be a need for architectures that enable optimal (i.e. full) use of the laser light sources used for any of a range of selectable output white light color points, as the choice in output powers in known light engines may be very limited and installation of redundant laser diodes may be very expensive. Furthermore, for entertainment lighting it may be a desire to provide higher light output values than what may be realized with the highest power laser banks that are currently available on the market. Even if the laser bank power could be further scaled by increasing the number of laser diodes comprised in the laser bank, then thismay result in a further increase of the light source etendue which is not desirable. Therefore,there may be a need for tunable laser-phosphor light engines that may use the full power of more than two laser banks while not increasing the light source etendue. Hence, it is an aspect of the invention to provide an alternative light generating system, which preferably further at least partly obviates one or more of above-described drawbacks. The present invention may have as object to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. According to a first aspect, the invention provides a light generating system comprising light generating devices, a luminescent element, a control system, optics, a diffuser system, and a light exit. In embodiments, each of the light generating devices may comprise a solid-state light source. In further embodiments, a first light generating device may be configured to provide first device light having a first centroid wavelength (λc1). Similarly, in embodiments, a second light generating device may be configured to provide second device light having a second centroid wavelength (λc2). Yet similarly, in embodiments, a third light generating device may be configured to provide third device light having a third centroid wavelength (λc3). In embodiments, the first centroid wavelength (λc1), the second centroid wavelength (λc2), and the third centroid wavelength (λc3) may be 2023PF80436 3 individually selected from the wavelength range of 400-500 nm, such as especially individually selected from the wavelength range of 440-490 nm. Especially, λc3≠λc1and Further, in embodiments, the optics may comprise redirection optics. Especially, in embodiments, the redirection optics may be configured in a light-receiving relationship withone or more of the first light generating device, the second light generating device, and thethird light generating device. In embodiments, the first device light, the second device light, and the third device light reaching the redirection optics may especially comprise linear polarized light, with the first device light and the second device light (reaching the redirection optics) having different linear polarizations. Moreover, in embodiments, the luminescent element may comprise a (first) luminescent material configured to convert at least part of device light received by the luminescent element into (first) luminescent material light. Furthermore, in embodiments, the diffuser system may comprise an arrangement of a polarization converter and a diffuser. In embodiments, the diffuser system may be configured to diffuse at least part of the third device light received by the diffuser system into diffused device light. Especially, in embodiments, the diffused device light may have a linear polarization different from the linear polarization of the third device light received by the diffuser system. Furthermore, in embodiments, the redirection optics may comprise one ormore polarization based redirection optics and one or more dichroic based redirection optics.Especially, in embodiments, a first polarizing beam splitter may be configured to combine the first device light and the second device light into combined device light. Moreover, in embodiments, one or more further polarizing beam splitters may be configured to direct third device light (received by the one or more further polarizing beam splitters) in an optical path to the luminescent element or in an optical path to the diffuser system in dependence of the linear polarization of the third device light. Especially, in embodiments, one or more further polarizing beam splitters may be configured to direct third device light (received by the one or more further polarizing beam splitters) in an optical path to the luminescent element and in an optical path to the diffuser system in dependence of the linear polarization of the third device light. Further, in embodiments, one or more further polarizing beam splitters may be configured to split third device light propagating to the diffuser system from diffused device light emanating from the diffuser system. Especially, in such embodiments, the different types of light may be split in dependence of the linear polarization. Furthermore, in embodiments, the one or more dichroic based redirection optics may be configured to direct the combined device light, received from the first polarizing beam splitter, (and at least part of the third device light) in an optical path to the luminescent element. Additionally, in 2023PF80436 4 embodiments, the one or more dichroic based redirection optics may be configured to split the (combined (and third)) device light propagating to the luminescent element from the luminescent material light emanating from the luminescent element. Yet additionally, in embodiments, the one or more dichroic based redirection optics may be configured to direct the luminescent material light and the diffused device light in an optical path to the light exit. In further embodiments, the light generating system may be configured to generate in an operational mode system light comprising at least part of the luminescent material light andat least part of the diffused light. Especially, in embodiments, the system light may be whitelight. Furthermore, in embodiments, the control system may be configured to control a spectral power distribution of the system light. Hence, in embodiments, the invention provides a light generating system comprising light generating devices, a luminescent element, a control system, optics, a diffuser system, and a light exit, wherein: (A) each of thelight generating devices may comprise a solid-state light source; wherein (i) a first lightgenerating device may be configured to provide first device light having a first centroid wavelength (λc1), (ii) a second light generating device may be configured to provide second device light having a second centroid wavelength (λc2), and (iii) a third light generating device may be configured to provide third device light having a third centroid wavelength (λc3); wherein the first centroid wavelength (λc1), the second centroid wavelength (λc2), and the third centroid wavelength (λc3) may be individually selected from the wavelength range of 400-500 nm, such as especially individually selected from the wavelength range of 440- 490 nm; wherein λc3≠λc1and λc3≠λc2; (B) the optics may comprise redirection optics; wherein the first device light, the second device light, and the third device light reaching the redirection optics may comprise linear polarized light, with the first device light and the second device light (reaching the redirection optics) having different linear polarizations; (C) the luminescent element may comprise a (first) luminescent material configured to convert at least part of device light received by the luminescent element into (first) luminescent material light; (D) the diffuser system may comprise an arrangement of a polarization converter and adiffuser; wherein the diffuser system may be configured to diffuse at least part of the thirddevice light received by the diffuser system into diffused device light (having a linear polarization different from the linear polarization of the third device light received by the diffuser system); (E) the redirection optics may comprise one or more polarization based redirection optics and one or more dichroic based redirection optics; (F) a first polarizing beam splitter may be configured to combine the first device light and the second device light into combined device light; (G) one or more further polarizing beam splitters may be 2023PF80436 5 configured to (a) direct third device light (received by the one or more further polarizing beam splitters) in an optical path to the luminescent element and in an optical path to the diffuser system in dependence of the linear polarization of the third device light, and (b) split third device light propagating to the diffuser system from diffused device light emanating from the diffuser system (in dependence of the linear polarization); (H) the one or more dichroic based redirection optics may be configured to (a) direct the combined device light (and at least part of the third device light), received from the first polarizing beam splitter in an optical path to the luminescent element, (b) split the (combined) device light propagating to the luminescent element from the luminescent material light emanating from the luminescent element, and (c) direct the luminescent material light and the diffused device light in an optical path to the light exit; (I) the light generating system may be configured to generate in an operational mode system light comprising at least part of the luminescent material light and at least part of the diffused light, and wherein the system light may be white light; and (J) the control system may be configured to control a spectral power distribution of the system light. With such system, a high-power light generating system may be provided. Further, such system may allow control of spectral power distribution of the system light (of a high-power system), in dependence of the (controllable) polarization of light. Yet, such system may in a safe way provide high power light. The system may be relatively compact. Yet, thermal management of the luminescent material may also be provided with this system. In addition to high optical power, the system may also provide high radiance (or luminance), i.e., a high optical power density of the source. The invention may further provide light engine architectures that may be operated with three (independent) laser banks at (constant) equal, optimal (e.g., most efficient), or maximum drive currents, while using the same etendue as that of a single laser bank and while providing a tunable CCT. Furthermore, with such a system, the tunable CCT may be easily factory-calibrated with respect to the requested color point. Yet further, withsuch a system the color point may easily be adjusted by the user, for any of the color pointsselected in a predetermined range of white light output color points (e.g. 6000 – 10000 K),while providing highly efficient collection of all the spectral contributions to the output light, resulting in a relatively high efficiency high brightness and high flux (>40 klm) white light engine. Hence, the invention may provide a constant power tunable CCT laser-phosphor source comprising three laser banks. 2023PF80436 6 The light generating system (or “system”) may thus comprise light generating devices, a luminescent element, a control system, optics, a diffuser system, and a light exit. The light generating system may especially apply three (or more) light generating devices that may each be operated at a constant power while the system may be set to any correlated color temperature (CCT) in a predetermined range of CCTs. Here below, embodiments of the different components of the light generating system will be described in further detail. The light generating devices may be configured to generate device light. Therefore, in embodiments, the light generating devices may each comprise a solid-state light source. In embodiments, the light generating devices may comprise (at least) a first light generating device, a second light generating device, and a third light generating device. The first light generating device may, in embodiments, be configured to generate first device light. Therefore, in embodiments, the first light generating device may comprise a first lightsource. The first light source may be essentially any light source, see also further below.Especially, in embodiments, the (first light source of the) first light generating device may comprise a first solid state light source. Hence, in embodiments, the first light generating device may comprise one or more of a laser diode, a superluminescent diode, and a stacked multi-junction light-emitting diode (LED). The first light generating device may herein alsocomprise a plurality of first (solid state) light sources. Especially, in specific embodiments,the first light generating device may comprise a first laser bank comprising a plurality of first lasers. A laser bank may comprise a relatively dense assembly of multiple laser diodes on a shared substrate provided with collimating optics, such as collimating lenses comprising one lens per laser diode (e.g. arranged in an array of lenses, see also further below). The use of laser banks may especially be convenient for projecting a beam of high power laser light onto a luminescent converter without the need for using an inverse beam expander. Further, in embodiments, the first light generating device may especially be configured to generate first device light having a first centroid wavelength (λc1). Especially, in embodiments, the first device light may have a first centroid wavelength (λc1) selected from the wavelength range of 430-500 nm, such as from the range of 440-490 nm, like from the range of 445-480 nm. Hence, in embodiments, the first device light may be blue light. Analogously to the first light generating device, in embodiments, the second light generating device may be configured to generate second device light. Therefore, in embodiments, the second light generating device may comprise a second light source. The second light source may be essentially any light source, see also further below. Especially, in embodiments, the (second light source of the) second light generating device may comprise a 2023PF80436 7 second solid state light source. Hence, in embodiments, the second light generating device may comprise one or more of a laser diode, a superluminescent diode, and a stacked multi- junction light-emitting diode (LED). In embodiments, the second light generating device may comprise essentially the same light generating device as the first light generating device. However, in other embodiments, the first light generating device and the second light generating device may be substantially different. The second light generating device may herein also comprise a plurality of second (solid state) light sources. Especially, in specific embodiments, the second light generating device may comprise a second laser bank comprising a plurality of second lasers. Further, in embodiments, the second light generating device may especially be configured to generate second device light having a second centroid wavelength (λc2). Especially, in embodiments, the second device light may have a second centroid wavelength (λc2) selected from the wavelength range of 430-500 nm, such as from the range of 440-490 nm, like from the range of 445-480 nm. Hence, in embodiments, the second device light may be blue light. In embodiments, the first centroid wavelength (λc1) and the second centroid wavelength (λc2) may be essentially the same wavelengths, i.e., λc1=λc2. However, in alternative embodiments, the first centroid wavelength (λc1) and the second centroid wavelength (λc2) may be different, i.e. |λc1-λc2|≥1 nm, such as |λc1-λc2|≥2 nm, like |λc1-λc2|≥5 nm, especially |λc1-λc2|≥10 nm. Further, in embodiments, |λc1-λc2|≤30 nm, such as |λc1-λc2|≤25 nm, like |λc1-λc2|≤20 nm. In specific embodiments, λc1=λc2. In embodiments, the first and second light generating devices may be (essentially fully) used to pump the luminescent material to provide luminescent material light, see also further below. Furthermore, in embodiments, the third light generating device may be configured to generate third device light. Therefore, in embodiments, the third light generating device may comprise a third light source. The third light source may be essentially any light source, see also further below. Especially, in embodiments, the (third light source of the) third light generating device may comprise a third solid state light source. Hence, in embodiments, the third light generating device may comprise one or more of a laser diode, a superluminescent diode, and a stacked multi-junction light-emitting diode (LED). In embodiments, the third light generating device may comprise essentially the same light generating device as the first and / or second light generating devices. However, in other embodiments, the first and / or second light generating devices and the third light generating device may be substantially different. The third light generating device may herein also 2023PF80436 8 comprise a plurality of third (solid state) light sources. Especially, in specific embodiments, the third light generating device may comprise a third laser bank comprising a plurality of third lasers. Further, in embodiments, the third light generating device may especially be configured to generate third device light having a third centroid wavelength (λc3). Especially, in embodiments, the third device light may have a third centroid wavelength (λc3) selected from the wavelength range of 430-500 nm, such as from the range of 440-490 nm, like from the range of 445-480 nm. In specific embodiments, third centroid wavelength (λc3) may be selected from the wavelength range of 445-470 nm, such as from the range of 445-465 nm, like from the range of 450-460 nm. Hence, in embodiments, the third device light may be blue light. In embodiments, the third light generating device may adjustably be used for irradiating (or “pumping”) one or more of (i) the luminescent material to provide luminescent material light and (ii) the diffuser to provide diffused device light. More especially, in embodiments, the third light generating device may adjustably be used for irradiating (or “pumping”) both (i) the luminescent material to provide luminescent material light and (ii) the diffuser to provide diffused device light, see also further below. In embodiments, the first centroid wavelength (λc1) and the third centroid wavelength (λc3) may be essentially the same wavelengths, i.e., λc1=λc3. However, in specific embodiments, the first centroid wavelength (λc1) and the third centroid wavelength (λc3) may be different, i.e. |λc1-λc3|≥1 nm, such as |λc1-λc3|≥2 nm, like |λc1-λc3|≥5 nm, especially |λc1- λc3|≥10 nm. Further, in embodiments, |λc1-λc3|≤30 nm, such as |λc1-λc3|≤25 nm, like |λc1- λc3|≤20 nm. Similarly, in embodiments, the second centroid wavelength (λc2) and the third centroid wavelength (λc3) may be essentially the same wavelengths, i.e., λc2=λc3. However, in specific embodiments, the second centroid wavelength (λc2) and the third centroid wavelength (λc3) may be different, i.e. |λc2-λc3|≥1 nm, such as |λc2-λc3|≥2 nm, like |λc2-λc3|≥5 nm, especially |λc2-λc3|≥10 nm. Further, in embodiments, |λc2-λc3|≤30 nm, such as |λc2-λc3|≤25 nm, like |λc2-λc3|≤20 nm. In principle, when two centroid wavelengths differ, such as described in the preceding embodiments, then the spectral power distributions of the respective beams of light may inherently be different. Hence, such centroid wavelengths (as described here) may especially be beneficial as there may be a relatively large spectral window in between the third centroid wavelength relative to the first and second centroidwavelengths, which may allow for very convenient and highly tolerant dichroic mixing, seealso further below. 2023PF80436 9 The light generating system may, in embodiments, comprise further light generating devices. Such further light generating devices may then be configured to provide device light having a different wavelength from at least one of the first device light, the second device light, and the third device light, such that the additional device light may be combined with the first, second, and third device light through further dichroic multiplexing. For example, in embodiments, the light generating system may comprise a fourth light generating device (especially a fourth laser bank) configured to generate fourth device light having a fourth centroid wavelength (λc4), wherein λc4≠ λc1,and / or λc4≠ λc2, an / or λc3.In such embodiments, the light generating system may further comprise one or more additional dichroic based redirection optics configured to combine the fourth device light (optionally via a luminescent converter or a diffuser) into the system light. In embodiments, the first light generating device, the second light generating device, and the third light generating device may be configured to provide first device light, second device light, and third device light, respectively, to the optics. The optics may, in embodiments, comprise redirection optics. Especially, in embodiments, the redirection optics may comprise one or more polarization based redirection optics. Such optics may thus redirect light received by said optics in dependence of the polarization of the light. Furthermore, in embodiments, the redirection optics may comprise one or more dichroic based redirection optics. Such optics may thus redirect light received by said optics in dependence of the spectral power (distribution) of the light. In embodiments, the redirection optics may especially comprise a first polarizing beam splitter (PBS1). Herein, in embodiments, a polarizing beam splitter may especially be configured to split light received by the polarizing beam splitter into orthogonal beams of light having different (orthogonal) polarization. The polarizing beam splitter may especially do so upon irradiation at an about 45° angle. Additionally or alternatively, in embodiments, a polarizing beam splitter may be configured to combine light received by the polarizing beam splitter from orthogonal beams of light and having different (orthogonal) (linear) polarizations into a same optical path. In embodiments, (in an operational mode of the light generating system) the first polarizing beam splitter may be configured downstream of both the first light generating device and the second light generating device. In other words, in embodiments, in an operational mode of the light generating system the first polarizing beam splitter may beconfigured in a light-receiving relationship with both the first device light and the seconddevice light. The terms “upstream” and “downstream” relate to an arrangement of items or 2023PF80436 10 features relative to the propagation of the light from a light generating means (here the especially the light source), wherein relative to a first position within a beam of light from the light generating means, a second position in the beam of light closer to the light generating means is “upstream”, and a third position within the beam of light further away from the light generating means is “downstream”. In embodiments, the device light received by the first polarizing beam splitter may especially be polarized light. Hence, in embodiments, the light generating system may be configured such that (both) the first device light and( / or) the second device received by the first polarizing beam splitter may comprise polarized light. The phrase “... light received by ...”, and similar phrases, such as “device light received by the first polarizing beam splitter” may especially indicate that when the light is actually received by an item, an action may take place. The action may in embodiments be one or more of conversion, reflection, andtransmission. Further, the action may also include refraction. Whether or not such itemreceives light may e.g. depend on e.g. a controlling mode (for instance whether or not a light generating device provides light). In embodiments, the first device light received by the first polarizing beam splitter may especially comprise linearly polarized first device light, such as e.g. p-polarized first device light and / or s-polarized first device light. The first light generating device may, in embodiments, be configured to provide linearly polarized first device light. Additionally or alternatively, in embodiments, the first device light may be unpolarized or elliptically (such as circularly) light and a polarization control system (see also further below) may be configured such that linearly polarized first device light may be provided to the first polarizing beam splitter. In such embodiments, the polarization control system may especially comprise a polarizer configured to change the polarization of device light received by the polarizer. For example, in embodiments, the first light generating device may be configured to generate elliptically polarized first device and to provide said elliptically polarized first device light to the polarizer (such as e.g. a λ / 4 or λ / 2 waveplate). In such embodiments, the polarizer may be configured to convert the elliptically polarized first device light (received by the polarizer) into linearly polarized first device light. Similarly, in embodiments, the second device light received by the first polarizing beam splitter may especially comprise linearly polarized second device light, such as e.g. p-polarized second device light and / or s-polarized second device light. The second light generating device may, in embodiments, be configured to provide linearly polarized second device light. Additionally or alternatively, in embodiments, the second device light 2023PF80436 11 may be unpolarized or elliptically (such as circularly) polarized light and the polarization control system (see also further below) may be configured such that linearly polarized second device light may be provided to the first polarizing beam splitter. For example, in embodiments, the second light generating device may be configured to generate elliptically polarized second device light and to provide said elliptically polarized second device light to the polarizer (such as e.g. a λ / 4 or λ / 2 waveplate). In such embodiments, the polarizer may be configured to convert the elliptically polarized second device light (received by the polarizer) into linearly polarized second device light. The first polarizing beam splitter may further, in embodiments, be configured upstream of the luminescent element. As such, in embodiments, the luminescent element may be configured in a light-receiving relationship with the first polarizing beam splitter. Especially, in embodiments, the first polarizing beam splitter may be configured to direct device light (in an optical path) to the luminescent element. In embodiments, the first polarizing beam splitter may be configured to transmit or reflect (device) light in dependence of its polarization. Especially, in embodiments, the first polarizing beam splitter may be configured to transmit (or reflect) (device) light received by the first polarizing beam splitter and (said (device) light)comprising a first linear polarization. Especially, in embodiments, the first polarizing beamsplitter may be configured to transmit (or reflect) at least 60%, such as at least 70%, like at least 80% of the light (comprising the first linear polarization) received by the first polarizing beam splitter. Especially, in embodiments, the first polarizing beam splitter may be configured to transmit (or reflect) at least 90%, more especially at least 95%, including 100% of the light (comprising the first linear polarization) received by the first polarizing beam splitter. Further, in such embodiments, the first polarizing beam splitter may be configured to reflect (or transmit) light received by the first polarizing beam splitter and (said (device) light) comprising a second linear polarization. Especially, in embodiments, the first polarizing beam splitter may be configured to reflect (or transmit) at least 60%, such as at least 70%, like at least 80% of the light (comprising the second linear polarization) received by the first polarizing beam splitter. Especially, in embodiments, the first polarizing beam splitter may be configured to reflect (or transmit) at least 90%, more especially at least 95%, including 100% of the light (comprising the second linear polarization) received by the first polarizing beam splitter. Note that, in embodiments, the first polarizing beam splitter may herein especially function as a beam combiner. Especially, in embodiments, the first polarizing beam splitter may be configured to combine (along a same optical path) at least a 2023PF80436 12 part of the first device light with at least a part of the second device light into combined light. Such percentage may refer to the percentage of the radiant flux (received by the firstpolarizing beam splitter (especially under 45° angle with a normal of the plane of incidenceof the element)). In embodiments, the second linear polarization may especially be different from the first linear polarization. Especially, in some embodiments the first linear polarization may be p-polarization and the second linear polarization may be s-polarization. In other embodiments, the first polarization may be s-polarization and the second polarization may be p-polarization. Herein, the terms “p-polarization” and “s-polarization” may especially refer to the polarization of light when incident on (a light-receiving plane of) the light- receiving element, such as e.g. the first polarizing beam splitter. Hence, in embodiments, the first polarizing beam splitter may be configured to transmit p-polarized light received by the first polarizing beam splitter and to reflect s-polarized light received by the first polarizing beam splitter. Additionally or alternatively, in embodiments, the first polarizing beam splitter may be configured to transmit s-polarized light received by the first polarizing beam splitter and to reflect p-polarized light received by the first polarizing beam splitter. Especially, in some embodiments, the first polarizing beam splitter may be configured such that a ratio of the amount of s-polarized light being transmitted relative to the amount of p-polarized light being transmitted may be ≤0.9, such as ≤0.8, like ≤0.6, especially ≤0.4. Similarly, in some embodiments, the first polarizing beam splitter may be configured such that a ratio of the amount of p-polarized light being reflected relative to the amount of s-polarized light being reflected may be ≤0.9, such as ≤0.8, like ≤0.6, especially ≤0.4. Yet alternatively, in embodiments, the first polarizing beam splitter may be configured to partially transmit and partially reflect one or more of light comprising the first linear polarization and light comprising the second linear polarization, see also further below. Amounts, ratio’s, and / or percentages of light as described herein may be based on the spectral power (of the light) (e.g. Watts). Hence, as described above, the first polarizing beam splitter may, in embodiments, be configured to combine the first device light and the second device light into combined device light. Especially, in embodiments, in a first operational mode of the light generating system the first polarizing beam splitter may be configured to direct part of (or even essentially all of) the combined device light in an optical path to the luminescentelement. Note that herein, in embodiments, the light generating system may be operated in aplurality of (different) operational modes, such as the first operational mode indicated above. 2023PF80436 13 Furthermore, in embodiments, the term “first operational mode” may herein also refer to a plurality of (different) first operational modes. Furthermore, in embodiments, the optics together with the first and second light generating devices may be configured such that at least 70%, such as at least 80%, like at least 90% of the combined device light redirected by the first polarizing beam splitter may be directed (in an optical path) towards the luminescent element. Especially, in embodiments, the optics together with the first and second light generating devices may be configured such that at least 95%, more especially at least 98%, including 100% of the combined device light redirected by the first polarizing beam splitter may be directed towards the luminescent element. Herein the phrase “to direct light in an optical path to an element” and similar phrases may refer to a beam of light beam of which its direction may be changed such that the beam may propagate through the system towards the respective element. During thepropagation, the beam of light may optionally pass through or interact with other opticalelements, such as e.g. lenses and integrators, before being incident on the element it may be propagating towards. In embodiments, the luminescent element may comprise a luminescent material. The luminescent material may be configured to convert light received by the luminescent material into luminescent material light. Especially, in embodiments, the luminescent element may comprise a first luminescent material configured to convert light received by the first luminescent material into first luminescent material light. The luminescent material is configured to convert at least part of first radiation (selected from one or more of UV radiation and visible radiation), into luminescent material light. Especially, in embodiments the luminescent material may be configured to convert at least part of blue light (as radiation) into luminescent material light. Especially when blue light is partly converted, the blue light may be used as source of blue light (for the device light) and as excitation light that can be converted by the luminescent material. The first radiation may especially be provided by a (solid state) light source. Hence, in embodiments, the luminescent material may be configured to convert at least part of combined device light received by the luminescent material into luminescent material light. Especially, in embodiments, the luminescent material may be configured to convert at least 50%, such as at least 60%, like at least 70% of the combined device light received by the luminescent material (arrangement) into luminescent material light. Especially, in embodiments, the luminescent material may be configured to convert at least 80%, more especially at least 90%, including 100% of the 2023PF80436 14 combined device light received by the luminescent material (arrangement) into luminescent material light. When different luminescent materials are applied, one or more luminescent materials may be configured to convert incident light into one or more of green and yellow luminescent material light, and one or more other luminescent materials may be configured to convert incident light into one or more of orange and red luminescent material light. The term “luminescent material” especially refers to a material that can convert first radiation,(especially one or more of UV radiation and blue radiation,) into second radiation. In general, the first radiation and second radiation have different spectral power distributions. Hence, instead of the term “luminescent material”, also the terms “luminescent converter” or “converter” may be applied. Further, instead of the term “luminescent material” also the term “phosphor” may be applied. These terms are known to the person skilled in the art. In general, the second radiation has a spectral power distribution at larger wavelengths than the first radiation, which is the case in the so-called down- conversion. In specific embodiments, however the second radiation has a spectral power distribution with intensity at smaller wavelengths than the first radiation, which is the case in the so-called up-conversion. In embodiments, the “luminescent material” may especially refer to a material that can convert radiation into e.g. visible and / or infrared light. For instance, in embodiments the luminescent material may be able to convert one or more of UV radiation and blue radiation, into visible light. The luminescent material may in specific embodiments also convert radiation into infrared radiation (IR). Hence, upon excitation with radiation, the luminescent material emits radiation. In general, the luminescent material will be a down converter, i.e. radiation of a smaller wavelength is converted into radiation with a larger wavelength (λex<λem), though in specific embodiments the luminescent material may comprise up-converter luminescent material, i.e. radiation of a larger wavelength is converted into radiation with a smaller wavelength (λex>λem). In embodiments, the term “luminescence” may refer to phosphorescence. In embodiments, the term “luminescence” may also refer to fluorescence. Instead of the term “luminescence”, also the term “emission” may be applied. Hence, the terms “first radiation” and “second radiation” may refer to excitation radiation and emission (radiation), respectively. Likewise, the term “luminescent material” may in embodiments refer to phosphorescence and / or fluorescence. 2023PF80436 15 The term “luminescent material” may also refer to a plurality of different luminescent materials. Hence, the term “luminescent material” may in specific embodiments also refer to a luminescent material composition. The term “luminescent material” herein may also refer to a material comprising a luminescent material, such as a light transmissive host comprising the luminescent material. Examples of possible luminescent materials are indicated further below. Referring back to the redirection optics, in embodiments, the polarization based redirection optics may comprise one or more further polarizing beam splitters (PBS). Especially, in embodiments, the one or more further polarizing beam splitters may comprise at least a second polarizing beam splitter (PBS2) and a third polarizing beam splitter (PBS3), see also further below. In embodiments, the one or more further polarizing beam splitters may be configured downstream of the third light generating device. Hence, the one or more further polarizing beam splitters may be configured (via one or more other optics and / or a birefringent rotator, see also further below) in a light-receiving relationship with the third light generating device. In embodiments, the one or more further polarizing beam splitters may especially be configured to direct (at least part of) the third device light (received by the one or more further polarizing beam splitters) in an optical path to the luminescent element. Additionally or alternatively, in embodiments, the one or more further polarizing beam splitters may especially be configured to direct (at least part of) the third device light (received by the one or more further polarizing beam splitters) in an optical path to the diffuser system. Whether the one or more further polarizing beam splitter direct the third device light to the luminescent element or to the diffuser system may especially depend on the linear polarization of the third device light (reaching the one or more further polarizing beam splitters). For example, in embodiments, the one or more further polarizing beam splitters may be configured to direct a part of the third device light having a first linear polarization to the luminescent element and another part of the third device light having a second linear polarization (different from the first linear polarization) to the diffuser system. In such embodiments, the first linear polarization and the second linear polarization may especially be orthogonal linear polarizations, such as e.g. p polarization and s polarization respectively. In some embodiments, the one or more further polarizing beam splitters may be configured to direct at least part of the third device light (in dependence of its polarization) to the luminescent element and at least another part of the third device light to the diffuser 2023PF80436 16 system. Especially, in embodiments, in a first operational mode of the light generating system the one or more further polarizing beam splitters may be configured to direct between 40- 99.9% of the third device light to the luminescent element, such as between 50-95%, like between 60-90%, especially between 70-90%. Furthermore, in such embodiments, in the first operational mode of the light generating system the one or more further polarizing beam splitters may be configured to direct between 0.01-60% of the third device light to the diffuser system, such as between 5-50%, like between 10-40%, especially between 10-30%. However, in alternative embodiments, in an operational mode of the light generating system the one or more further polarizing beam splitters may be configured to direct less than 40%, such as less than 30%, like less than 20%, especially less than 10% of the third device light to the luminescent element. Furthermore, in such embodiments, in an operational mode of the light generating system the one or more further polarizing beam splitters may be configuredto direct at least 60%, such as at least 70%, like at least 80%, especially at least 90% of thethird device light (in an optical path) to the diffuser system. Hence, in specific embodiments, the one or more further polarizing beam splitters may be configured to direct third device light (received by the one or more further polarizing beam splitters) in an optical path to the luminescent element and in an optical pathto the diffuser system in dependence of the linear polarization of the third device light. Inalternative embodiments, the one or more further polarizing beam splitters may be configured to direct essentially all (i.e.98-100%) of the third device light (received by the one or more further polarizing beam splitters) to either the luminescent element or the diffuser system, such as especially to the luminescent element, or such as especially to the diffuser system. As indicated above, in embodiments, part of the third device light received by the one or more further polarizing beam splitters may be directed to the diffuser system. In embodiments, the diffuser system may comprise a (surface) diffuser. Especially, in embodiments, the diffuser may comprise an element comprising a light-diffusive material, such as e.g. a silica, ground glass, a polymeric material, a ceramic material, a metal(lic) material, a white material, and a rough-surfaced material. Further, in embodiments, the diffuser may comprise a diffractive optical element, such as e.g. a diffractive diffuser, or a holographic optical element, such as e.g. metasurfaces comprising multiple different sub- wavelength features at the surface of a substrate such as fused silica. Further, in embodiments, the diffuser system may comprise a polarization converter. Especially, in embodiments, the polarization converter may comprise a birefringent rotator, more especially a λ / 4 waveplate. As known from the art, a waveplate or retarder is an optical device that 2023PF80436 17 alters the polarization state of a light wave travelling through it. A halfwave plate may shift the polarization direction of linearly polarized light (especially from s to p or from p to s polarization), and a quarter-wave plate may convert linearly polarized light into elliptically (such as especially circularly) polarized light (and vice versa). The λ / 4 waveplate may especially be configured between (relative to the propagation of light through the system) the one or more further polarizing beam splitters and the diffuser. In embodiments, the one or more further polarizing beam splitters may thus be configured to direct third device light received by the one or more further polarizing beam splitters and comprising (either) the first linear polarization or the second linear polarization (optionally via optics) to the polarization converter (i.e. the λ / 4 waveplate). The λ / 4 waveplate may, in embodiments, be configured to convert third device light received by the λ / 4 waveplate comprising a linear polarization into third device light having a (first) circular polarization. At the diffuser, in embodiments, the third device light having the (first) circular polarization may be diffused into (third) diffused device light having a second circular polarization. Therefore, in embodiments, the λ / 4 waveplate may also be configured to convert (third) diffused device light received by the λ / 4 waveplate (via the diffuser) and having the (second) circular polarization into (third) diffused device light comprising a linear polarization. For example, in embodiments, p-polarized third device light may be directed by the one or more further polarizing beam splitters to the λ / 4 waveplate. In such embodiments, the λ / 4 waveplate may be configured to convert the p- polarized third device light into left-handed circularly polarized third device light. Further, in such embodiments, the diffuser may be configured to diffuse the left-handed elliptically (like circularly) polarized third device light received by the diffuser into right-handed elliptically (like circularly polarized third diffused device light. Hence, the handedness may change, but the polarization, i.e. elliptically (like circularly), may substantially maintain. The λ / 4 waveplate may then, in embodiments, be configured to convert the right-handed circularly polarized third diffused device light received by the λ / 4 waveplate (back) to linearly polarized light, especially to s-polarized third diffused device light. However, in embodiments, different polarizations and conversions from the example described here may be possible too, such as e.g. starting from s-polarized third device light. Hence, in embodiments, the diffuser system may comprise an arrangement of a polarization converter and a diffuser. The diffuser may, in embodiments, be configured to diffuse at least part of the third device light received by the diffuser system into diffused (third) device light.Especially, in embodiments, the diffuser may be configured to diffuse at least 30%, like at 2023PF80436 18 least 50%, such as at least 60%, like at least 70% of the third device light, received by the diffuser system, into diffused device light. Especially, in embodiments, the diffuser may be configured to diffuse at least 80%, more especially at least 90%, including 100% of the third device light received by the diffuser system into diffused device light. In embodiments, the diffuser may especially comprise a substantially polarization maintaining diffuser, i.e., the diffuser may be configured to substantially maintain the polarization of the incident light upon diffusion (and in some embodiments reflection)(even though the handedness may (thus) change). Such embodiments may be beneficial as depolarization at the diffuser may be reduced, therewith improving the efficiency of the contribution of the diffuser arrangement to the system light. Therefore, in embodiments, the diffuser may comprise a metal coated surface textured glass substrate mounted on a heat conductive material such as e.g. a metal or a ceramic. In such embodiments, the heat conductive material may be configured to conduct away heat that may be generated in the diffuser due to some absorption of incident device light. Furthermore, in embodiments, the diffuser system may comprise a beam profiler. In embodiments, the beam profiler may be configured between the polarization converter and the diffuser. The beam profiler may especially be configured to adapt a light radiance distribution of the diffused device light received by the beam profiler. Therefore, in embodiments, the beam profiler may, e.g., comprise an engineered diffuser, such as a top-hat diffuser or any other tailored intensity profile adjusting diffuser. Such embodiments may be beneficial as the beam profiler may allow for matching the radiance distribution of the diffused device light optimally with the luminescent material light radiance distribution. The one or more further polarizing beam splitters may further be configured to split third device light propagating to the diffuser system from diffused device light emanating from the diffuser system. In embodiments, the one or more further polarizing beam splitters may especially be configured to split the third device light from the diffused device light in dependence of the linear polarization. Hence, in embodiments, the light generating system may be configured to generate luminescent material light and / or diffused device light. In embodiments, the redirection optics may be configured such that the luminescent material light and / or the diffused device light may propagate via at least part of the optics to the light exit. Therefore, in embodiments, the redirection optics may comprise the one or more dichroic based redirection optics. 2023PF80436 19 In embodiments, at least one of the one or more dichroic based redirection optics may be configured in a light-receiving relationship with the first polarizing beam splitter. Especially, in embodiments, at least one of the one or more dichroic based redirection optics (especially a dichroic beam splitter (DBS), see also further below) may be configured in an optical path between the first polarizing beam splitter and the luminescent element. As such, in embodiments, the one or more dichroic based redirection optics may be configured to direct the combined device light (and at least part of the third device light, seealso further below) received from the first polarizing beam splitter in an optical path to theluminescent element. Especially, in embodiments, the one or more dichroic based redirection optics may be configured to reflect the combined device light received from the first polarizing beam splitter towards the luminescent element. Alternatively, in embodiments, the one or more dichroic based redirection optics may be configured to transmit the combined device light received from the first polarizing beam splitter towards the luminescent element. Further, in embodiments, at least one of the one or more dichroic based redirection optics may be configured in a light-receiving relationship with the luminescent element. The one or more dichroic based redirection optics may, in embodiments, be configured to split light in dependence of the spectral power distribution. Especially, in embodiments, the one of the one or more dichroic based redirection optics (especially a dichroic beam splitter, see also further below) may be configured to split the combined (blue) device light propagating to the luminescent element from the (yellow) luminescent material light emanating from the luminescent element. Hence, in embodiments, the one or more dichroic based redirection optics may be configured to reflect light having a centroid wavelength in the blue wavelength range, and to transmit light having a centroid wavelength in the yellow wavelength range. Alternatively, in embodiments, the one or more dichroic based redirection optics may be configured to transmit light having a centroid wavelength in the blue wavelength range, and to reflect light having a centroid wavelength in the yellow wavelength range. Especially, in embodiments, the one or more dichroic based redirection optics may be configured to transmit (or reflect) the (combined and third) device light (received by the dichroic based redirection optics), and to reflect (or transmit) the luminescent material light (received by the dichroic based redirection optics). Yet further, in embodiments, in an operational mode of the light generating system the one or more dichroic based redirection optics may be configured in a light- receiving relationship (optionally via other optics) with both the luminescent element and the diffuser system. Especially, in embodiments, the luminescent material light and the diffused 2023PF80436 20 device light may be provided to at least one of the one or more dichroic based redirection optics in directions orthogonal to each other. Alternatively, in embodiments where at least one of the one or more dichroic based redirection optics may comprise a dichroic cube (see also further below), the luminescent material light and the diffused device light may be provided (as collinear beams) to the at least one of the one or more dichroic based redirection optics in directions opposite to each other. As such, in embodiments, the one or more dichroic based redirection optics may be configured to direct the luminescent material light (received by the one or more dichroic based redirection optics) and the diffused device light (received by the one or more dichroic based redirection optics) along a same optical path to the light exit. Especially, in embodiments, the at least one of the one or more dichroic based redirection optics may be configured to reflect the (yellow) luminescent material light, and to transmit the (blue) diffused device light (in dependence of their spectral power distribution). Alternatively, in embodiments, the at least one of the one or more dichroic based redirection optics may be configured to transmit the (yellow) luminescent material light, and to reflect the (blue) diffused device light (in dependence of their spectral power distribution). As such, in embodiments, the at least one of the one or more dichroic based redirection optics may function as a beam combiner (e.g. configured to combine (along a same optical path) the luminescent material light with the diffused device light). Hence, in embodiments, part of the optics (especially in some embodiments the dichroic based redirection optics) may be configured to combine at least part of the luminescent material light and at least part of the diffused device light into a same optical path. Herein, the phrase “to combine X and Y into a same optical path” and similar phrases may refer to the respective beams of light being provided such, that their respective optical axes may be substantially parallel and / or may coincide. The term “optical axis” may especially be defined as an imaginary line that defines the path along which light propagates through a system. Especially, the optical axis may coincide with the direction of the light with the highest radiant flux. Herein, the light exit may refer to a position where system light escapes from the light generating system. This may, in embodiments, be a light transmissive window or an opening (in the system). The light transmissive window may in embodiments be provided by an optical component. The light generating system may thus, in embodiments, be configured to provide in the first operational mode of the light generating system at the light exit one or more of luminescent material light and diffused device light. In other words, in such 2023PF80436 21 embodiments, (the system light comprising) one or more of luminescent material light and diffused device light may emanate away from the light generating system via the light exit. Inembodiments, the light generating system may especially be configured to generate systemlight comprising one or more of at least part of the luminescent material light and at least part of the diffused device light. Hence, in embodiments, the light generating system may be configured to provide in the first operational mode of the light generating system at the light exit system light comprising one or more of at least part of the luminescent material light and at least part of the diffused device light. In embodiments, the control system may be configured to control the system light (see also further below). Especially, in embodiments, the control system may be configured to control a spectral power distribution of the system light. Further, in embodiments, the control system may be configured to control a radiant flux of the systemlight. Hence, in embodiments, the control system may be configured to control one or moreof a correlated color temperature and a radiant flux of the system light. The control system may especially be configured to control said spectral power distribution by e.g. controlling the polarization control system (see also further below). Additionally or alternatively, in embodiments, the control system may be configured to control said spectral power distribution by controlling the light generating devices. Especially, in such embodiments, the control system may be configured to control the polarization of at least the third light generating device. Hence, in such embodiments, the amount of third device light comprising the first linear polarization and third device light comprising the second linear polarization may be controlled by the control system, which may in turn be controlling the light generating devices. In an operational mode of the light generating system, in embodiments, the system light may thus comprise (yellow-green) luminescent material light and (blue) diffused device light. Hence, in such embodiments, the system light may be white light. Especially, in embodiments, in an operational mode of the light generating system the system light may be white light having a correlated color temperature selected from the range of 2000-12000 K, such as from the range of 2700-10000 K, especially from the range of 6000-10000 K , such as a correlated color temperature selected from the range of 6000-8000 K. Additionally or alternatively, in embodiments, in an operational mode of the light generating system the system light may be white light having a color rendering index of at least 60, such as at least 65, like at least 70, especially at least 80. Such embodiments may especially be beneficial for application of the light generating system in entertainment (spot) lighting applications. 2023PF80436 22 The term “white light”, and similar terms, herein, is known to the person skilled in the art. It may especially relate to light having a correlated color temperature (CCT) between about 1800 K and 20000 K, such as between 2000 and 20000 K, especially 2700- 20000 K, for general lighting especially in the range of about 2000-7000 K, such as in the range of 2700 K and 6500 K. In embodiments, e.g. for backlighting purposes, or for other purposes, the correlated color temperature (CCT) may especially be in the range of about 7000 K and 20000 K. Yet further, in embodiments the correlated color temperature (CCT) may especially be within about 15 SDCM (standard deviation of color matching) from the BBL (black body locus), especially within about 10 SDCM from the BBL, even more especially within about 5 SDCM from the BBL. However, this may not necessarily be the case. In specific embodiments, the correlated color temperature (CCT) may be selected from the range of 6000-12000 K, like selected from the range of 7000-12000 K, like at least 8000 K. Yet further, in embodiments the correlated color temperature (CCT) may be selected from the range of 6000-12000 K, like selected from the range of 7000-12000 K, in combination with a CRI of at least 70. In specific embodiments, in an operational mode of the light generating system the system light may be white light having a correlated color temperature selected from the range of 6000-10000 K and a color rendering index of at least 60. The light generating system as described herein may thus especially be designed to operate based on the application of three laser sources (in particular laser banks) that all at the same time and continuously may be operated at a constant power while the system may be set to any of the CCTs from a predetermined range. The light generating system may especially apply the polarization based redirection optics to achieve polarization multiplexing. Via polarization multiplexing the light from two separate light generating devices (especially laser banks) may be combined within the etendue of a single light generating device (i.e. laser bank). To provide even more light than what is possible with the use of two high power laser banks, the invention further applies the dichroic based redirection optics to additively mix light from a third light generating device (especially third laser bank) into the system light. Thanks to the very narrow linewidth of laser emission and the possibility to collimate the light into relatively well collimated beams, the laser beams from sources with peak wavelengths that are quite close to each other may be admixed well using a dichroic beam combiner. Through the use of a different wavelength for the third light generating device, in embodiments, the light generating system may enable optimum use of 2023PF80436 23 all light generating devices (especially laser diodes) at any selected color temperature. Hence, in embodiments, the light generating devices may be configured to operate at (theirrespective) rated forward currents. Herein the term “rated forward current” may especiallyrefer to a rated (as done by a manufacturer) of the forward current which a solid state light source (as specified above) may carry without damaging the light generating device. Especially, in embodiments, the light generating devices may be configured to operate at a maximum operating condition complying with lifetime and efficiency boundary conditions.More especially, the light generating devices may be configured to operate at one ofmaximum efficiency, maximum output, their nominal rated current, or operation conditions with a chosen trade-off between output power, efficiency, and lifetime. As indicated above, in combining the light of the three light generating devices the dichroic based redirection optics may be applied. Especially, in embodiments, the dichroic based redirection optics may comprise a first dichroic beam splitter (DBS1). Herein, in embodiments, a dichroic beam splitter may especially be configured to split light received by the dichroic beam splitter and having different wavelengths into separate beams of light propagating in orthogonal directions relative to each other. The dichroic beam splitter may especially do so upon irradiation at an about 45° angle. Additionally or alternatively, in embodiments, a dichroic beam splitter may be configured to combine light received by the dichroic beam splitter from orthogonal beams of light and having different wavelengths into a same optical path. The first dichroic beam splitter may especially be configured in a light- receiving relationship with the first polarizing beam splitter and the third polarizing beam splitter. Especially, in embodiments, the first dichroic beam splitter may be configured to combine combined device light (received from the first polarizing beam splitter) and at least part of the third device light (received from the third polarizing beam splitter) into a same optical path to the luminescent element. Especially, in embodiments, the first dichroic beam splitter may be configured to transmit the combined device light received by the first dichroicbeam splitter and to reflect the third device light received by the first dichroic beam splitter.Alternatively, in embodiments, the first dichroic beam splitter may be configured to reflect the combined device light received by the first dichroic beam splitter and to transmit the third device light received by the first dichroic beam splitter. Note that, in embodiments, the first dichroic beam splitter may thus function as a beam combiner. Herein, in embodiments, a dichroic beam splitter may comprise one or more of a (flat or tile-shaped) dichroic mirror (e.g. a flat plat or tile comprising a dichroic coating), a 2023PF80436 24 dichroic cube (e.g. a cube comprising a diagonally oriented internal plane comprising a dichroic coating), and a dichroic sphere (e.g. a sphere comprising a cross-sectional internal plane comprising a dichroic coating). The one or more dichroic based redirection optics may further, in embodiments, comprise a second dichroic beam splitter (DBS2). In embodiments, the second dichroic beam splitter may be configured downstream of (and thus in a light-receiving relationship with) the first dichroic beam splitter. The second dichroic beam splitter may especially be configured in an optical path between the first dichroic beam splitter and the luminescent element. In embodiments, the second dichroic beam splitter may be configured to at least partially transmit device light and optionally diffused device light received by the second dichroic beam splitter. The second dichroic beam splitter may especially be configured to transmit the device light in an optical path to the luminescent element. Furthermore, the second dichroic beam splitter may, in embodiments, be configured to transmit the diffused device light in an optical path to the light exit. Alternatively, in embodiments, the second dichroic beam splitter may be configured to at least partially reflect device light received by the second dichroic beam splitter. The second dichroic beam splitter may especially be configured reflect the device light to the luminescent element. Furthermore, the second dichroic beam splitter may, in embodiments, be configured to reflect the diffused device light in an optical path to the light exit. In such embodiments, additional redirection of one or more of the device light and the diffused device light (such as e.g. via at least one additional mirror) may especially be applied, such that both the device light and the diffused device light may be incident on the second dichroic beam splitter from opposite directions. Further, in embodiments, the second dichroic beam splitter may be configured to at least partially reflect luminescent material light received by the second dichroic beam splitter. The second dichroic beam splitter may especially be configured to reflect theluminescent material light in an optical path to the light exit or a third dichroic beam splitter(DBS3) (see also further below). Alternatively, in embodiments, the second dichroic beam splitter may be configured to at least partially transmit luminescent material light received by the second dichroic beam splitter. The second dichroic beam splitter may especially be configured to transmit the luminescent material light in an optical path to the light exit or a third dichroic beam splitter (see also further below). Hence, in some embodiments, the 2023PF80436 25 second dichroic beam splitter may be configured to combine the luminescent material light and the diffused device light into a same optical path to the light exit. The one or more dichroic based redirection optics may further, in embodiments, comprise a third dichroic beam splitter. In embodiments, the third dichroic beam splitter may be configured downstream of (and thus in a light-receiving relationship with) both the second dichroic beam splitter and the diffuser system (via the one or more further polarizing beam splitters). In embodiments, the third dichroic beam splitter may be configured to direct the luminescent material light (received by the third dichroic beam splitter) and the diffuseddevice light (received by the third dichroic beam splitter) into an optical path to the light exit.In other words, the third dichroic beam splitter may be configured to combine the luminescent material light and the diffused device light into the same optical path to the light exit. Note that, in embodiments, the third dichroic beam splitter may thus function as a beam combiner. Therefore, in embodiments, the third dichroic beam splitter may be configured to at least partially transmit luminescent material light received by the third dichroic beam splitter to the light exit. Alternatively, in embodiments, the third dichroic beam splitter may be configured to at least partially reflect luminescent material light received by the third dichroic beam splitter to the light exit. Further, in embodiments, the third dichroic beam splitter may be configured to at least partially reflect diffused device light received by the third dichroic beam splitter to the light exit. Alternatively, in embodiments, the third dichroic beam splitter may be configured to at least partially transmit diffused device light received by the third dichroic beam splitter to the light exit. Similarly to the one or more dichroic beam splitters, in embodiments, the one or more further polarizing beam splitters may comprise a second polarizing beam splitter. Moreover, in embodiments, the one or more further polarizing beam splitters may comprise a third polarizing beam splitter. In embodiments, the second polarizing beam splitter may be configured downstream of the third light generating device. Further, in embodiments, the second polarizing beam splitter may be configured upstream of the first dichroic beam splitter. Additionally or alternatively, in embodiments, the second polarizing beam splitter may be configured upstream of the second dichroic beam splitter. In specific embodiments, the second polarizing beam splitter may be configured upstream of the first dichroic beam splitter and the second dichroic beam splitter (and optionally the third dichroic beam splitter). 2023PF80436 26 The second polarizing beam splitter may be configured to at least partially transmit third device light received by the second polarizing beam splitter. In such embodiments, the second polarizing beam splitter may transmit the third device light in an optical path to the diffuser system or to the first dichroic beam splitter. Especially, in embodiments, the second polarizing beam splitter may thus do so in dependence of its polarization. Alternatively, in embodiments, the second polarizing beam splitter may be configured to at least partially reflect third device light received by the second polarizing beam splitter. In such embodiments, the second polarizing beam splitter may reflect the third device light in an optical path to the diffuser system or to the first dichroic beam splitter. Especially, in embodiments, the second polarizing beam splitter may thus do so in dependence of its polarization. Furthermore, in embodiments, the second polarizing beam splitter may be configured to at least partially reflect diffused device light received by the second polarizing beam splitter. Especially, in embodiments, the second polarizing beam splitter may thus do so in dependence of its polarization. Further, in such embodiments, the second polarizing beam splitter may reflect the diffused device light in an optical path to the light exit. Alternatively, in embodiments, the second polarizing beam splitter may be configured to at least partiallytransmit diffused device light received by the second polarizing beam splitter. Especially, inembodiments, the second polarizing beam splitter may thus do so in dependence of its polarization. Further, in such embodiments, the second polarizing beam splitter may transmit the diffused device light in an optical path to the light exit. Moreover, in embodiments, the second polarizing beam splitter and the third dichroic beam splitter may be (spatially) combined into a single redirection optical element. Especially, in embodiments, the second polarizing beam splitter may comprise an additional spectral requirement such that at least (a substantial) part of a spectral power of the luminescent material light received by the second polarizing beam splitter may be reflected. In other words, the (combined third dichroic beam splitter and) second polarizing beam splitter may be configured, such that at least (a substantial) part of a spectral power of the luminescent material light received by the (combined third dichroic beam splitter and) second polarizing beam splitter may be reflected. Especially in embodiments, (the spectral requirement of) the second polarizing beam splitter may be selected such that at least 60%, such as at least 70%, like at least 80%, especially at least 90%, more especially at least 95%, including 100% of the spectral power of the luminescent material light received by the (combined third dichroic beam splitter and) second polarizing beam splitter may be reflected. 2023PF80436 27 In embodiments, such a spectral requirement as described above may e.g. be achieved by providing an optical layer (or coating), especially a dichroically active layer, to the second polarizing beam splitter. Herein, the term “dichroically active layer” may especially refer to a dielectric layer having a certain refractive index. Further, in embodiments, one or more such optical layers, such as an arrangement of such optical layers, may be provided to the second polarizing beam splitter. Hence, in such embodiments, the second polarizing beam splitter may comprise a stack of dielectric layers with alternating refractive indices (and optionally alternating individual dielectric layer thicknesses). However, in some embodiments, the third dichroic beam splitter may function essentially independent of the polarization of the device light. Similarly, in some embodiments, the first dichroic beam splitter and the second dichroic beam splitter may function essentially independent of the polarization of the device light. Furthermore, in embodiments, the third polarizing beam splitter may be configured downstream of the third light generating device. Further, in embodiments, the third polarizing beam splitter may be configured upstream of the first dichroic beam splitter. Additionally or alternatively, in embodiments, the third polarizing beam splitter may be configured upstream of the second dichroic beam splitter. In specific embodiments, the third polarizing beam splitter may be configured in an optical path between the third light generating device and both the luminescent element and the diffuser system. As such, in embodiments, the third polarizing beam splitter may be configured to direct part of the third device light in an optical path to the luminescent element and another part of the third device light in an optical path to the diffuser system. Hence, in embodiments, the third polarizing beam splitter may be configured to direct a first part of the third device light (received by the third polarizing beam splitter) in an optical path to the luminescent element (via one or more other (redirection) optics such as e.g. the first dichroic beam splitter and / or the second dichroic beam splitter). Especially, in embodiments, the third polarizing beam splitter may be configured to direct at least 30%,especially at least 50%, such as at least 60%, especially at least 70% of the third device lightto the luminescent element. Further, in embodiments, the third polarizing beam splitter may be configured to direct at most 100%, such as at most 99%, especially at most 95% of the third device light to the luminescent element. Especially, in embodiments, the third polarizing beam splitter may thus do so in dependence of the (linear) polarization of the third device light. In embodiments, the third polarizing beam splitter may be configured to transmit a first part of the third device light having one of a first linear polarization and a 2023PF80436 28 second linear polarization (such as e.g. p-polarization or s-polarization) to the luminescent element. Alternatively, in embodiments, the third polarizing beam splitter may be configured to reflect a first part of the third device light having one of the first linear polarization and the second linear polarization (such as e.g. p-polarization or s-polarization) to the luminescent element. In specific embodiments, the third polarizing beam splitter may be only partly transmissive for p-polarized device light, for which a practical lower limit may be around 50%, such as at least 60%. Conversely, in such embodiments, a practical upper limit may be around 80%, such as at most 90%. Analogously, in specific embodiments, the second polarizing beam splitter may be only partly reflective for s-polarized device light, and also here a practical lower limit may be around 50%, such as at least 60%. Conversely, in such embodiments, a practical upper limit may be around 80%, such as at most 90%. Embodiments with such a partial polarizing beam splitter may have a clear advantage, as here the blue channel efficiency may be improved should the (reflective) diffuser system cause some degree of depolarization upon diffusive reflection of the device light. Such embodiments may further provide the advantage of tunability (i.e., limiting) of the range of potential engine output CCT’s to a practical range of interest, by which the accuracy of selecting a desired engine output CCT by the control system may be increased. Further, in embodiments, the third polarizing beam splitter may be configured to direct a second part of the third device light (received by the third polarizing beam splitter) in an optical path to the diffuser system (via one or more other (redirection) optics such as e.g. the second polarizing beam splitter). Especially, in embodiments, the third polarizing beam splitter may be configured to direct at least 1%, such as at least 5%, especially at least 15% of the third device light to the diffuser system. Further, in embodiments, the third polarizing beam splitter may be configured to direct at most 50%, such as at most 40%, especially at most 30% of the third device light to the diffuser system. Especially, in embodiments, the third polarizing beam splitter may thus do so in dependence of the (linear) polarization of the third device light. In embodiments, the third polarizing beam splitter may be configured to transmit a second part of the third device light having another one of the first linear polarization and a second linear polarization (such as e.g. p-polarization or s- polarization) to the diffuser system. Alternatively, in embodiments, the third polarizing beam splitter may be configured to reflect a second part of the third device light having another one of the first linear polarization and a second linear polarization (such as e.g. p-polarization or s-polarization) to the diffuser system. 2023PF80436 29 For example, in embodiments, the third device light may comprise 90% s- polarized light and 10% p-polarized light, and the third polarizing beam splitter may be configured to reflect the s-polarized light (in an optical path to the luminescent element) and to transmit the p-polarized light (in an optical path to the diffuser system). In some embodiments, the third polarizing beam splitter may be configured to direct essentially all (i.e.100%) of the third device light to the luminescent element and essentially no (i.e.0%) third device light to the diffuser system, or vice versa. Hence, in such embodiments, the third device light may comprise more of the first linear polarization (e.g. essentially 100% p- polarization) than of the second linear polarization (e.g. essentially 0% s-polarization), or vice versa. Moreover, in embodiments, the second polarizing beam splitter and the third polarizing beam splitter may be (spatially) combined into a single polarization based redirection optical element. Especially, in embodiments, the second polarizing beam splitter and the third polarizing beam splitter may comprise a single polarization based redirection optical element configured to transmit (third and diffused) device light having the first linear polarization, and to reflect (third and diffused) device light having the second linear polarization. Alternatively, in embodiments, the second polarizing beam splitter and the third polarizing beam splitter may comprise a single polarization based redirection optical element configured to reflect (third and diffused) device light having the first linear polarization, and to transmit (third and diffused) device light having the second linear polarization. As described above, the polarization of the third device light may thus impact the optical path the third device light may follow through the light generating system. Therefore, in embodiments, the light generating system may comprise a polarization control system. The polarization control system may be configured to control the polarization of (at least) the third device light (reaching the third polarizing beam splitter. Hence, as such, the polarization of the third device light may be controlled. Additionally, in embodiments, the polarization control system may be configured to control a polarization of the first and / or second device light, see also above. In embodiments, the polarization control system may comprise a birefringent rotator (or especially a Faraday rotator). Especially, in such embodiments, the birefringent rotator may be configured downstream of the third light generating device and upstream of the one or more further polarizing beam splitters. In general, a birefringent rotator may refer to an element having a refractive index that may depend on the polarization of light incident on the birefringent rotator, i.e., the element may be characterized by two perpendicular 2023PF80436 30 optical axes in the plane of the element, with different refractive indices for perpendicularly incoming light with polarizations along these respective axes.. In embodiments, through rotation of the birefringent rotator, and thus the rotation of the orientation of the optical axis of the birefringent rotator in a plane perpendicular to the optical axis of the incident light, relative to the plane of (linear) polarization of the incident light the linear polarization of that light may be changed. As such, in embodiments, the birefringent rotator may be configured to receive the third device light emitted by the third light generating device and may be configured to adjust (or control) the polarization of the third device light, such that third device light having a predetermined (linear) polarization may be provided to the one or more further polarizing beam splitters. Especially, in embodiments, the polarization control system may be configured to control rotation of the birefringent rotator, such that the polarization of the third device light reaching the one or more further polarizing beam splitters may be adjusted. The birefringent rotator may therefore, in embodiments, comprise a λ / 2 waveplate. Here, in embodiments, the wavelength λ may especially refer to a representative wavelength of the incoming beam of third device light, with which, upon rotation about the optical axis (of the birefringent rotator), the polarization of the incoming (linearly polarized) beam of third device light can be rotated by any angle. Hence, in embodiments, with a λ / 2 waveplateconfigured in an optical path between the third light generating device and the one or morefurther polarizing beam splitters, a linearly polarized beam of third device light may be adjusted such that a beam of third device light comprising any ratio of p / (s+p) and s / (s+p)may be provided to the one or more further polarizing beam splitters. In such embodiments, pmay refer to the p-polarized fraction and s may refer to the s-polarized fraction relative to a splitting (transmitting vs reflecting) plane of the one or more further polarizing beam splitters receiving the polarized third device light. Additionally or alternatively, in embodiments, the polarization control system may comprise an actuator. In embodiments, the actuator may be configured to (mechanically) rotate the third light generating device. As such, in embodiments, the actuator may change the polarization of (a beam of) the third device light provided to the one or more further polarizing beam splitters. The polarization control system may, in embodiments, be configured to control the actuator. Especially, in embodiments, the polarization control system may be configured to control the actuator such that the polarization of the third device light reaching the one or more further polarizing beam splitters may be adjusted. Yet additionally or alternatively, in embodiments, the polarization control system may comprise an adjustable fixating mechanism (such as e.g. a screw, a clamp, etc..) 2023PF80436 31 configured such that the orientation of the third light generating device and the birefringent rotator relative to each other may be factory set. Furthermore, in some embodiments, the polarization control system may comprise both the birefringent rotator and the actuator. In such embodiments, the actuator may (also) be configured to control the birefringent rotator. However, in alternative such embodiments, the polarization control system may comprise a separate actuator for the birefringent rotator. Hence, in embodiments, the light generating system may comprise a polarization control system configured to control the polarization of (at least) the third device light (reaching the third polarizing beam splitter), wherein the polarization control system may comprise one or more of: (A) a birefringent rotator configured downstream of the third light generating device and upstream of the one or more further polarizing beam splitters, wherein the polarization control system may be configured to control rotation of the birefringent rotator (such that the polarization of the third device light reaching the one or more further polarizing beam splitters may be adjusted); and wherein the birefringent rotator may comprise a λ / 2 waveplate; and (B) an actuator configured to (mechanically) rotate the third light generating device, wherein the polarization control system may be configured to control the actuator (such that the polarization of the third device light reaching the one or more further polarizing beam splitters may be adjusted). Thus, the polarization control system may be configured to control a polarization of the third device light reaching the third polarizing beam splitter. Especially, in embodiments, the polarization control system may be configured such that x1% of third device light comprising the first linear polarization and y1% of third device light comprisingthe second linear polarization may be provided to the third polarizing beam splitter. Herein,in embodiments, x1 and y1 may be individually selected from the range of 0-100%, such as from the range of 10-90%, like from the range of 20-80%. In some embodiments, the polarization control system may be configured such that only third device light comprising the first linear polarization may be provided to the third polarizing beam splitter, i.e., x1=100% and y1=0%. In other embodiments, the polarization control system may be configured such that only third device light comprising the second linear polarization may be provided to the third polarizing beam splitter, i.e., y1=100% and x1=0%. In yet other embodiments, the polarization control system may be configured such that a combination of third device light comprising the first linear polarization and third device light comprising the second linear polarization may be provided to the third polarizing beam splitter, i.e., x1≠0%, y1≠0%, and x1+y1=100%. For example, in embodiments, the polarization control system 2023PF80436 32 may be configured such that x=70% of third device light comprising the first linear polarization and y=30% of third device light comprising the second linear polarization may be provided to the third polarizing beam splitter, or vice versa (i.e., x1=30% and y1=70%). Hence, in embodiments, the polarization control system may be configured to control a polarization of the third device light reaching the third polarizing beam splitter. Especially, in embodiments, the polarization control system may be configured to control a polarization of the third device light reaching the third polarizing beam splitter, such that at least part of the third device light received by the third polarizing beam splitter may be directed in an optical path to the luminescent element and at least another part of the third device light received by the third polarizing beam splitter may be directed in an optical path to the diffuser system. For example, in embodiments, 50-100%, such as 60-98%, like 65-95% of the third device light received by the third polarizing beam splitter may be directed in an optical path to the luminescent element. Conversely, in embodiments, 0-50%, such as 2-40%, like 5-35% of the third device light received by the third polarizing beam splitter may be directed in an optical path to the diffuser system. In embodiments, an element, such as e.g. the luminescent element and / or the diffuser, may be configured in either a reflective mode or a transmissive mode. Especially, the luminescent element and / or the diffuser may be configured in the transmissive mode. In the transmissive mode, it may be relatively easy to have light source light admixed in the luminescent material light and / or the diffused device light, respectively, which may be useful for generating the desirable spectral power distribution. Hence, would any device light escape from the system, in embodiments, this may only escape via transmission through the luminescent material and / or the diffuser. Especially, in some embodiments, the luminescent material and the diffuser may both be configured in the transmissive mode. Such embodiments may be beneficial as no additional optical elements (such as waveplates) are necessary to separate the undiffused device light from the diffused device light. An additional benefit thereof may be that the polarization of the device light reaching the diffuser system may be irrelevant of its function. In embodiments with both the luminescent material and the diffuser configured in the transmissive mode further optics may be required to allow combination of the luminescent material light and the diffused device light along the same optical path to the light exit. Especially, in embodiments, the optics may comprise further dichroic beam splitters configured to combine the luminescent material light and the diffused device light along a same optical path to the light exit. In such embodiments, the dichroic beam splitter may in an operational mode be configured downstream (rather than 2023PF80436 33 upstream) of one or more of the luminescent material and the diffuser. Especially, in some embodiments, the dichroic beam splitter may in an operational mode be configured downstream of both the luminescent material and the diffuser. Furthermore, in embodiments when the diffuser and / or luminescent material may be configured in the transmissive mode, it may be desired to provide a safety mechanism, such that eye-safety may be ensured in case of failure (or decay) of one or more of the optical elements. For example, in embodiments, the safety mechanism may comprise a small-angle diffuse reflector configured to transmit undiffused (i.e. unsafe) device light (optionally to a beam dump) and to reflect diffused device light to the light exit optionally via one or more optics. However, alternative safety mechanisms may be possible as well, such as e.g. comprising one or more light sensors and / or a reflective polarizer. In the reflective mode, thermal management may be easier, as a substantial part of the luminescent element (especially the luminescent material) and / or the diffuser may be in thermal contact with a thermally conductive element, like a heatsink or heat spreader. Hence, would any device light escape from the system, in embodiments, this may only escape via reflection at the luminescent material and / or the diffuser. Here below, some further embodiments of the luminescent material(s) in the luminescent element are described. In embodiments, luminescent materials are selected from garnets and nitrides, especially doped with trivalent cerium or divalent europium, respectively. The term “nitride” may also refer to oxynitride or nitridosilicate, etc. Alternatively or additionally, the luminescent material(s) may be selected from silicates, especially doped with divalent europium. Especially, the luminescent material is configured to convert at least part of the light source light into luminescent material light, wherein the luminescent material may comprise a (garnet)(first) luminescent material of the type A3B5O12:Ce, wherein A comprises one or more of Y, La, Gd, Tb and Lu, and wherein B comprises one or more of Al, Ga, In and Sc. Hence, the luminescent material light may e.g. be green light or yellow light (or in specific embodiments even orange (dependent upon the composition of the garnet and cerium concentration)). However, other embodiments are also possible, see below. In embodiments, 0.05-10% of the A elements comprise Ce, even more especially 0.05-5%, such as 0.1-5%. Especially, embodiments, 0.1-3% of the A elements comprise Ce, such as up to 2%, like selected from the range of 0.1-1.5%, such as at least above 0.5%. Especially, a luminescent material comprises conversion material or is a conversion material. A luminescent material converts light from a light source, such as the 2023PF80436 34 light source light, into secondary light (here the luminescent material light). The luminescent material may comprise an organic group that converts the light, or a molecule that converts the light, or an inorganic group that converts the light, etc. Such groups (or molecule) may be indicated as converter element. The garnet type material as indicated above, comprises cerium (Ce) as converter element. Cerium comprising garnets are well known in the art. Hence, in specific embodiments the luminescent material comprises a (first) luminescent material of the type A3B5O12:Ce, wherein A in embodiments comprises one or more of Y, La, Gd, Tb and Lu, especially (at least) one or more of Y, Gd, Tb and Lu, and wherein B in embodiments comprises one or more of Al, Ga, In and Sc. Especially, A maycomprise one or more of Y, Gd and Lu, such as especially one or more of Y and Lu.Especially, B may comprise one or more of Al and Ga, more especially at least Al, such as essentially entirely Al. Hence, especially suitable luminescent materials are cerium comprising garnet materials. Embodiments of garnets especially include A3B5O12 garnets, wherein A comprises at least yttrium or lutetium and wherein B comprises at least aluminum. Such garnets may be doped with cerium (Ce), with praseodymium (Pr) or a combination of cerium and praseodymium; especially however with Ce. Especially, B comprises aluminum (Al), however, B may also partly comprise gallium (Ga) and / or scandium (Sc) and / or indium (In), especially up to about 20% of Al, more especially up to about 10 % of Al (i.e. the B ions essentially consist of 90 or more mole % of Al and 10 or less mole % of one or more of Ga, Sc, and In); B may especially comprise up to about 10% gallium. In another variant, B and O may at least partly be replaced by Si and N. The element A may especially be selected from the group consisting of yttrium (Y), gadolinium (Gd), terbium (Tb) and lutetium (Lu). Further, Gd and / or Tb are especially only present up to an amount of about 20% of A. In a specific embodiment, the garnet luminescent material comprises (Y1-xLux)3B5O12:Ce, wherein x is equal to or larger than 0 and equal to or smaller than 1. The term “:Ce”, indicates that part of the metal ions (i.e. in the garnets: part of the “A” ions) in the luminescent material is replaced by Ce. For instance, in the case of (Y1-xLux)3Al5O12:Ce, part of Y and / or Lu is replaced by Ce. This is known to the person skilled in the art. Ce will replace A in general for not more than 10%; in general, the Ce concentration will be in the range of 0.1 to 4%, especially 0.1 to 2% (relative to A). Assuming 1% Ce and 10% Y, the full correct formula could be (Y0.1Lu0.89Ce0.01)3Al5O12. Ce in garnets is substantially or only in the trivalent state, as is known to the person skilled in the art. In embodiments, the luminescent material (thus) comprises A3B5O12 wherein in specific embodiments at maximum 10% of B-O may be replaced by Si-N. 2023PF80436 35 In specific embodiments the luminescent material comprises (Yx1-x2-x3A’x2Cex3)3(Aly1-y2B’y2)5O12, wherein x1+x2+x3=1, wherein x3>0, wherein 0<x2+x3≤0.2, wherein y1+y2=1, wherein 0≤y2≤0.2, wherein A’ comprises one or more elements selected from the group consisting of lanthanides, and wherein B’ comprises one or more elements selected from the group consisting of Ga, In and Sc. In embodiments, x3 is selected from the range of 0.001-0.1. In the present invention, especially x1>0, such as >0.2, like at least 0.8. Garnets with Y may provide suitable spectral power distributions. In specific embodiments at maximum 10% of B-O may be replaced by Si-N. Here, B in B-O refers to one or more of Al, Ga, In and Sc (and O refers to oxygen); in specific embodiments B-O may refer to Al-O. As indicated above, in specific embodiments x3 may be selected from the range of 0.001-0.04. Especially, such luminescent materials may have a suitable spectral distribution (see however below), have a relatively high efficiency, have a relatively high thermal stability, and allow a high CRI (optionally in combination with (the) light of other sources of light as described herein). Hence, in specific embodiments A may be selected from the group consisting of Lu and Gd. Alternatively or additionally, B may comprise Ga. Hence, in embodiments the luminescent material comprises (Yx1-x2- x3(Lu,Gd)x2Cex3)3(Aly1-y2Gay2)5O12, wherein Lu and / or Gd may be available. Even more especially, x3 is selected from the range of 0.001-0.1, wherein 0<x2+x3≤0.1, and wherein 0≤y2≤0.1. Further, in specific embodiments, at maximum 1% of B-O may be replaced by Si- N. Here, the percentage refers to moles (as known in the art); see e.g. also EP3149108. In yet further specific embodiments, the luminescent material comprises (Yx1-x3Cex3)3Al5O12, wherein x1+x3=1, and wherein 0<x3≤0.2, such as 0.001-0.1. In specific embodiments, A may especially comprise at least Y, and B may especially comprise at least Al. Alternatively or additionally, the luminescent material may comprise a luminescent material of the type A3Si6N11:Ce3+, wherein A comprises one or more of Y, La, Gd, Tb and Lu, such as in embodiments one or more of La and Y. In specific embodiments, the luminescent material may comprise at least two different luminescent materials configured to provide luminescent material light having different spectral power distributions. As can be derived from the above, the term “different luminescent materials” may refer to luminescent materials that are different, or to two compositions, each including at least one luminescent material in common, but wherein the compositions differ. For instance, a primary luminescent material comprising luminescent materials A and B, and a secondary luminescent material comprising only A or only B, or 2023PF80436 36 comprising both A and B, but in a different weight ratio. Such primary luminescent material and secondary luminescent material may have different spectral power distributions of their respective luminescent material light. The garnet type luminescent material may also be described with an alternative formula A3B’2C’’3O12. Here, A may comprise one or more of (i) rare earth ions, such as one or more selected from Y3+, Lu3+, Gd3+, Tb3+, La3+, and (ii) divalent cations, such as Ca2+. Here, B may comprise one or more of (i) trivalent cations, such as one or more of Al3+, Ga3+, Sc3+, Sb3+, and In3+, and (ii) divalent cations, such as one or more of Mg2+and Mn2+. Here, C may comprise one or more of (i) trivalent cations, such as one or more of Ga3+and Al3+, (ii) divalent cations, such as Mn2+, and (iii) tetravalent cations, such as one or more of Si4+and Ge4+. With such ions, the garnet crystal structure can be maintained. Other substitutions than mentioned may also be possible. Alternatively or additionally, also other luminescent materials may be applied. For instance quantum dots and / or organic dyes may be applied and may optionally be embedded in transmissive matrices like e.g. polymers, like PMMA, or polysiloxanes, etc. etc. Instead of quantum dots or in addition to quantum dots, also other quantum confinement structures may be used. The term “quantum confinement structures” should, in the context of the present application, be understood as e.g. quantum wells, quantum dots, quantum rods, tripods, tetrapods, or nano-wires, etcetera. Organic phosphors can be used as well. Examples of suitable organic phosphor materials are organic luminescent materials based on perylene derivatives, for example compounds sold under the name Lumogen® by BASF. Examples of suitable compounds include, but are not limited to, Lumogen® Red F305, Lumogen® Orange F240, Lumogen® Yellow F083, and Lumogen® F170. Different luminescent materials may have different spectral power distributions of the respective luminescent material light. Alternatively or additionally, such different luminescent materials may especially have different color points (or dominant wavelengths). As indicated above, other luminescent materials may also be possible. Hence, in specific embodiments the luminescent material is selected from the group of divalent europium containing nitrides, divalent europium containing oxynitrides, divalent europium containing silicates, cerium comprising garnets, and quantum structures. Quantum structures may e.g. comprise quantum dots or quantum rods (or other quantum type particles) (see 2023PF80436 37 above). Quantum structures may also comprise quantum wells. Quantum structures may also comprise photonic crystals. The luminescent material may be comprised by a luminescent body. The luminescent body may be a layer, like a self-supporting layer. The luminescent body may also be a coating. The luminescent body may also comprise a luminescent coating on a support (especially a light transmissive support in the transmissive mode). Especially, the luminescent body may essentially be self-supporting. In embodiments, the luminescent material may be provided as luminescent body, such as a luminescent single crystal, a luminescent glass, or a luminescent ceramic body. Such body may be indicated as “converter body” or “luminescent body”. In embodiments, the luminescent body may be a luminescent single crystal or a luminescent ceramic body. For instance, in embodiments a cerium comprising garnet luminescent material may be provided as a luminescent single crystal or as a luminescent ceramic body. In other embodiments, the luminescent body may comprise a light transmissive body, wherein the luminescent material is embedded. For instance, the luminescent body may comprise a glass body, with luminescent material embedded therein. Or, the glass as such may be luminescent. In other embodiments, the luminescent body may comprise a polymeric body, with luminescent material embedded therein. In specific embodiments, the luminescent body comprises a ceramic body comprising the luminescent material. Ceramic bodies are known in the art. Alternatively, the luminescent body comprises single crystal. In yet further specific embodiments, different types of luminescent bodies may be applied. Hence, the body may especially be selected from single crystalline bodies and ceramic bodies. The latter may be more easily made than the former, while they nevertheless may have good optical and / or thermal properties. Hence, in embodiments, the luminescent element may especially comprise a luminescent body comprising a luminescent material. Further, in embodiments, the (luminescent body comprising the) luminescent material may be configured in thermal contact with a thermally conductive material. Especially, in embodiments where the luminescent material is configured in the reflective mode, such thermal contact may be beneficial as the luminescent material may give rise to significant thermal dissipation. Similarly, in some embodiments, the diffuser may be configured in thermal contact with a thermally conductive material. An element may be considered in “thermal contact” with another element if it can exchange energy through the process of heat. Hence, the elements may be thermally coupled. In embodiments, thermal contact can be achieved by physical contact. In embodiments, thermal contact may be achieved via a thermally conductive 2023PF80436 38 material, such as a thermally conductive glue (or thermally conductive adhesive). Thermal contact may also be achieved between two elements when the two elements are arrangedrelative to each other at a distance of equal to or less than about 10 µm, though largerdistances, such as up to 100 µm may be possible. The shorter the distance, the better the thermal contact. Especially, the distance is 10 µm or less, such as 5 µm or less, such as 1 µm or less. The distance may be the distanced between two respective surfaces of the respective elements. The distance may be an average distance. When the two elements are configured at a distance from each other, an intermediate material may be configured in between, though in other embodiments, the distance between the two elements may filled with a gas, liquid, or may be vacuum. When an intermediate material is available, the larger the distance, the higher the thermal conductivity may be useful for thermal contact between the two elements. However, the smaller the distance, the lower the thermal conductivity of the intermediate material may be (of course, higher thermal conductive materials may also be used). A thermally conductive material may especially have a thermal conductivity of at least about 20 W / (m*K), like at least about 30 W / (m*K), such as at least about 100 W / (m*K), like especially at least about 200 W / (m*K). In yet further specific embodiments, a thermally conductive material may especially have a thermal conductivity of at least about 10 W / (m*K). In embodiments, the thermally conductive material may be comprised by and / or configured in thermal contact with one or more of a heatsink, a heat spreader, and a two- phase cooling device. Another solution for the thermal management of the luminescent material may be to, in embodiments, apply (or mount) the (luminescent element especially the) luminescent material onto a rotating element, such as e.g. a rotating (phosphor-)wheel (or disk) or a rotating rod (or cylinder). Such embodiments may enable thermal spreading andcooling without the need for e.g. active water cooling, and thereby enabling maximumpossible irradiance values. Hence, in embodiments, the luminescent material may be configured onto a rotating element. Further, in embodiments, the diffuser may be a static diffuser. Alternatively, in embodiments, the diffuser may be a dynamic diffuser, such as e.g. a rotating wheel or arotating rod, with a reflective diffuser track. Furthermore, in such embodiments, the rotatingelement may (also) comprise an additional track comprising an additional luminescent material (different from the first luminescent material). Such embodiments may be beneficial as the additional luminescent material may add further color point tunability along a line that may be substantially parallel or at least more parallel to the BBL in a targeted range of color 2023PF80436 39 temperatures. However, the skilled person will understand that, in such embodiments, further optical requirements may need to apply for the redirection optics. In contrast to a static diffuser, a dynamic diffuser may provide improved thermal behavior and / or may improve elimination of speckle in the white output light, but may add bulk to the engine volume and rotating mass. Hence, in embodiments, the diffuser may (also) be configured onto a rotating element. In some embodiments, the luminescent material and the diffuser may each be configured on a separate rotating element. Alternatively, in embodiments, the luminescent material and the diffuser may be configured on the same rotating element, such as e.g. combined as separate rings on a rotating wheel or a rotating rod. As indicated above, the light generating system may comprise optics. The term “optics” may especially refer to (one or more) optical elements. Hence, the terms “optics” and “optical elements” may refer to the same items. The optics may include one or more of (specular or surface textured) mirrors, reflectors, collimators, lenses, prisms, diffusers, phase plates, polarizers, diffractive elements, gratings, dichroics, selectively reflective and / or selectively transmissive optics, arrays of one or more of the afore-mentioned, etc. Alternatively or additionally, the term “optics” may refer to a holographic element or a mixing rod. In embodiments, the optics may include one or more of beam expander optics and zoom lens optics. See further above for examples of optics. In embodiments, the optics may comprise an integrator, like a “Koehler integrator” (or “Köhler integrator”). In specific embodiments, the optics may comprise one or more of a integrating (or “homogenizing”) optics, collimating optics, condensing optics, and reflecting optics. For example, in embodiments, the luminescent material light and the diffused laser light may be provided (e.g. by the second dichroic beam splitter or the third dichroic beam splitter as defined above) along the same optical path to the light exit, and the optics may comprise a beam homogenizer configured upstream of the light exit and configured to combine and homogenize the received light and to provide (homogenized white) system light to the light exit. As indicated above, in embodiments, the light generating system may comprise laser banks. Typically, the use of “laser banks”, being relatively dense assemblies of multiple laser diodes on a shared substrate that are commonly already provided with collimating lenses (typically in the form of a lens array comprising one lens per diode) maybe convenient to project a beam of high power laser light onto a luminescent element withoutthe need for using an inverse beam expander. In specific embodiments, a laser bank may 2023PF80436 40 therefore comprise an array of lenses (monolithic as multi-lens-array or as a set of discrete lenses). In such embodiments, individual lenses of the array of lenses may correspond with (or act on the individual laser beams from) individual lasers in the laser bank. As beams of light emitted from such (multi-chip packages and / or) laser banks may comprise multiple narrow laser beams, each individual laser beam may represent a hot spot in the beam of device light. Focusing of such a beam of device light on e.g. a luminescent material may exceed the maximum tolerable local irradiance and result in damage to the luminescent material, or other materials present in the luminescent material arrangement. Therefore, in some embodiments, homogenizing optics may be applied and may especially be configured between (relative to the propagation of light through the system) the light generating devices (contributing to irradiation of the luminescent material) and collimating optics of the luminescent material, see also below. Similarly, in some embodiments, homogenizing optics may be applied and may especially be configured between (relative to the propagation of light through the system) the light generating devices (contributing to irradiation of the diffuser) and collimating optics of the diffuser, see also below. In embodiments, the homogenizing optics may e.g. comprise one or more of a transmissive volume diffuser, a transmissive surface diffuser, a reflective surface diffuser, a transmissive or reflective diffractive optical element, a transmissive holographic optical element, a single multi lens array, a double multi lens array such as a fly-eye lens array, or an integrating polygonal light pipe that may be either solid (with propagation in the integrator based on total internal reflection) or hollow (with propagation in the integrator based on specular reflection). In embodiments, the condensing optics may comprise a first condensing optics configured (directly) upstream of the luminescent material and a second condensing optics configured (directly) upstream of the diffuser. Especially, in embodiments, the first condensing optics and the second condensing optics may each comprise at least one positive lens. In specific embodiments (such as e.g. when the luminescent material is configured in the reflective mode) the first condensing optics may comprise a first positive lens and a second smaller positive lens. In such embodiments, the smaller positive lens may especially be located between (relative to the propagation of light through the system) the first positive lens and the luminescent material or diffuser, respectively. Further, in embodiments, the optics may comprise a first collecting and collimating optics configured (directly) downstream of the luminescent material and a second collecting and collimating optics configured (directly) downstream of the diffuser. Especially, in embodiments, the first 2023PF80436 41 collecting and collimating optics and the second collecting and collimating optics may each comprise at least one positive lens, especially at least two positive lenses. In embodiments, the collimating optics and / or condensing optics, especially the lenses, may comprise glass materials, such as e.g. N-BK7, H-K51, B270, or fused silica (FS). The latter shows relatively low absorption and relatively low induced stress, but also has a relatively low refractive index. Therefore, if FS is used for all the lenses, in embodiments, the condensing optics for the reflective mode may preferably comprise three lenses. As indicated above, the light generating system comprises a light generating device. A light generating device may especially be configured to generate device light. Especially, the light generating device may comprise a light source. The light source may especially configured to generate light source light. In embodiments, the device light may essentially consist of the device light. In other embodiments, the device light may essentially consist of converted light source light. In yet other embodiments, the device light may comprise (unconverted) light source light and converted light source light. Light source light may be converted with a luminescent material into luminescent material light and / or with an upconverter into upconverted light (see also below). The term “light generating device” may also refer to a plurality of light generating devices which may provide device light having essentially the same spectral power distributions. In specific embodiments, the term “light generating device” may also refer to a plurality of light generating devices which may provide device light having different spectral power distributions. The term “light source” may in principle relate to any light source known in the art. In a specific embodiment, the light source comprises a solid state LED light source (such as an LED or laser diode (or “diode laser”)). The light source may have a light escape surface. For LED’s it may for instance be the LED die, or when a resin is applied to the LED die, the outer surface of the resin. In principle, it may also be the terminal end of a fiber. The term escape surface especially relates to that part of the light source, where the light actually leaves or escapesfrom the light source. The light source is configured to provide a beam of light. This beam oflight (thus) escapes from the light exit surface of the light source. Likewise, a light generating device may comprise a light escape surface, such as an end window. Further, likewise a light generating system may comprise a light escape surface, such as an end window. The term “light source” may refer to a semiconductor light-emitting device, such as a light emitting diode (LEDs), a resonant cavity light emitting diode (RCLED), a 2023PF80436 42 vertical cavity laser diode (VCSELs), an edge emitting laser, etc... The term “light source” may also refer to an organic light-emitting diode (OLED), such as a passive-matrix (PMOLED) or an active-matrix (AMOLED). In a specific embodiment, the light source comprises a solid-state light source (such as an LED or laser diode). In an embodiment, the light source comprises an LED (light emitting diode). The terms “light source” or “solid state light source” may also refer to a superluminescent diode (SLED). The term “light source” may also relate to a plurality of (essentially identical (or different)) light sources, such as 2-2000 solid state light sources (such as LEDs or laser diodes (or “diode lasers”)).Hence, the term LED may also refer to a plurality of LEDs. In embodiments, the light source may comprise one or more micro-optical elements (array of micro lenses) downstream of a single solid-state light source, such as an LED, or downstream of a plurality of solid-state light sources (i.e. e.g. shared by multiple LEDs). In embodiments, the light source may comprise an LED with on-chip optics. In embodiments, the light source comprises pixelated single LEDs (with or without optics) (offering in embodiments on-chip beam steering). In embodiments, the light source may be configured to provide primary radiation, which is used as such, such as e.g. a blue light source, like a blue LED, or a green light source, such as a green LED, and a red light source, such as a red LED. Such LEDs, which may not comprise a luminescent material (“phosphor”) may be indicated as direct color LEDs. In other embodiments, however, the light source may be configured to provide primary radiation and part of the primary radiation is converted into secondary radiation. Secondary radiation may be based on conversion by a luminescent material. The secondary radiation may therefore also be indicated as luminescent material radiation. The luminescent material may in embodiments be comprised by the light source, such as an LED with a luminescent material layer or dome comprising luminescent material. Such LEDs may be indicated as phosphor converted LEDs or PC LEDs (phosphor converted LEDs). In other embodiments, the luminescent material may be configured at some distance (“remote”) from the light source, such as an LED with a luminescent material layer not in physical contact with a die of the LED. The light source may especially be configured to generate light source light having an optical axis (O), (a beam shape,) and a spectral power distribution. The light source light may in embodiments comprise one or more bands, e.g. having band widths as known for lasers. 2023PF80436 43 The term “light source” may (thus) refer to a light generating element as such, like e.g. a solid state light source, or e.g. to a package of the light generating element, such as a solid state light source, and one or more of a luminescent material comprising element and (other) optics, like a lens, a collimator. A light converter element (“converter element” or “converter”) may comprise a luminescent material comprising element. For instance, a solid state light source as such, like a blue LED, is a light source. A combination of a solid state light source (as light generating element) and a light converter element, such as a blue LED and a light converter element, optically coupled to the solid state light source, may also be a light source (but may also be indicated as light generating device). Hence, a white LED is a light source (but may e.g. also be indicated as (white) light generating device). The term “light source” herein may also refer to a light source comprising a solid state light source, such as an LED or a laser diode or a superluminescent diode. The term “light source” may (thus) in embodiments also refer to a light source that is (also) based on conversion of light, such as a light source in combination with a luminescent converter material. Hence, the term “light source” may also refer to a combination of an LED with a luminescent material configured to convert at least part of the LED radiation, or to a combination of a (diode) laser with a luminescent material configured to convert at least part of the (diode) laser radiation. In embodiments, the term “light source” may also refer to a combination of a light source, like an LED, and an optical filter, which may change the spectral power distribution of the light generated by the light source. Especially, the term “light generating device” may be used to address a light source and further (optical components), like an optical filter and / or a beam shaping element, etc. The phrases “different light sources” or “a plurality of different light sources”, and similar phrases, may in embodiments refer to a plurality of solid-state light sources selected from at least two different bins. Likewise, the phrases “identical light sources” or “a plurality of same light sources”, and similar phrases, may in embodiments refer to a plurality of solid-state light sources selected from the same bin. The term “solid state light source”, or “solid state material light source”, and similar terms, may especially refer to semiconductor light sources, such as a light emitting diode (LED), a diode laser, or a superluminescent diode. The term “laser light source” especially refers to a laser. Such laser may especially be configured to generate laser light source light having one or more wavelengths in the UV, visible, or infrared, especially having a wavelength selected from the spectral 2023PF80436 44 wavelength range of 200-2000 nm, such as 300-1500 nm. The term “laser” especially refers to a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. Especially, in embodiments the term “laser” may refer to a solid-state laser. In specific embodiments, the terms “laser” or “laser light source”, or similar terms, refer to a laser diode (or diode laser). Hence, in embodiments the light source comprises a laser light source. In embodiments, the terms “laser” or “solid state laser” or “solid state material laser” may refer to one or more of a semiconductor laser diodes (may also be indicated as “laser diodes” or diode lasers”), such as GaN, InGaN, AlGaInP, AlGaAs, InGaAsP, lead salt, vertical cavity surface emitting laser (VCSEL), quantum cascade laser, hybrid silicon laser, etc. As can be derived from the below, the term “laser light source” may also refer to a plurality of (different or identical) laser light sources. In this way, a higher brightnessmay be obtained. In embodiments, laser light sources may be arranged in a laser bank (seealso above). The laser bank may in embodiments comprise heat sinking and / or optics e.g. a lens to collimate the laser light. Hence, in embodiments lasers in a laser bank (or “laser array bank”) may share the same optics. The laser light source is configured to generate laser light source light (or “laser light”). The light source light may essentially consist of the laser light source light. The light source light may also comprise laser light source light of two or more (different or identical) laser light sources. For instance, the laser light source light of two or more (different or identical) laser light sources may be coupled into a light guide, to provide a single beam of light comprising the laser light source light of the two or more (different or identical) laser light sources. In specific embodiments, the light source light is thus especially collimated light source light. In yet further embodiments, the light source light is especially (collimated) laser light source light. The laser light source light may in embodiments comprise one or more bands, having band widths as known for lasers. In specific embodiments, the band(s) may be relatively sharp line(s), such as having full width half maximum (FWHM) in the range of less than 20 nm at RT, such as equal to or less than 10 nm. Hence, the light source light has a spectral power distribution (intensity on an energy scale as function of the wavelength) which may comprise one or more (narrow) bands. 2023PF80436 45 The beams (of light source light) may be focused or collimated beams of (laser) light source light. The term “focused” may especially refer to converging to a small spot. This small spot may be at the discrete converter region, or (slightly) upstream thereof or (slightly) downstream thereof. Especially, focusing and / or collimation may be such that the cross-sectional shape (perpendicular to the optical axis) of the beam at the discrete converter region (at the side face) is essentially not larger than the cross-section shape (perpendicular to the optical axis) of the discrete converter region (where the light source light irradiates thediscrete converter region). Focusing may be executed with one or more optics, like (focusing)lenses. Especially, two lenses may be applied to focus the laser light source light. Collimation may be executed with one or more (other) optics, like collimation elements, such as lenses and / or parabolic mirrors. In embodiments, the beam of (laser) light source light may be relatively highly collimated, such as in embodiments ≤2° (FWHM), more especially ≤1° (FWHM), most especially ≤0.5° (FWHM). Hence, ≤2° (FWHM) may be considered (highly) collimated light source light. Optics may be used to provide (high) collimation (see also above). The term “solid state material laser”, and similar terms, may refer to a solid state laser like based on a crystalline or glass body doped with ions, like transition metal ions and / or lanthanide ions, to a fiber laser, to a photonic crystal laser, to a semiconductor laser, such as e.g. a vertical cavity surface-emitting laser (VCSEL), etc. The term “solid state light source”, and similar terms, may especially refer to semiconductor light sources, such as a light emitting diode (LED), a laser diode, or a superluminescent diode. Instead of the term “solid state light source” also the term “semiconductor- based light source” may be applied. Hence, the term “semiconductor-based light source” may e.g. refer to one or more of a light emitting diode (LED), a laser diode, and a superluminescent diode. Hence, the light generating device may comprise one or more of a light emitting diode (LED), a laser diode, and a superluminescent diode. A light-emitting diode (LED), such as e.g. a single-junction light emitting diode or multi-junction light-emitting diode, is especially a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor may recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) may be determined by the energy required for electrons to cross the band gap of the semiconductor. 2023PF80436 46 A laser diode (or diode laser) may be a semiconductor device substantially similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction. This is known to a person skilled in the art. Superluminescent diodes are known in the art. A superluminescent diode may be indicated as a semiconductor device which may be able to emit low-coherence light. Especially, superluminescent diodes may combine the high power and brightness of laser diodes with the low coherence of conventional light-emitting diodes. The low (temporal) coherence of the source has advantages that the speckle is significantly reduced or not visible, and the spectral distribution of emission is much broader compared to laser diodes, which can be better suited for lighting applications. Hence, in embodiments, the solid state light source may comprise a superluminescent diode. For instance, in further specific embodiments, the solid state light source may comprise a GaN-based superluminescent diode, or an InGaN-based superluminescent diode, or an AlGaN-based superluminescent diode. The light generating system may be part of or may be applied in e.g. office lighting systems, household application systems, shop lighting systems, home lighting systems, accent lighting systems, spot lighting systems, theater lighting systems, fiber-optics application systems, projection systems, self-lit display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, indicator sign systems, decorative lighting systems, portable systems, automotive applications, (outdoor) road lighting systems, urban lighting systems, green house lighting systems, horticulture lighting, digital projection, or LCD backlighting. The light generatingsystem (or luminaire) may be part of or may be applied in e.g. optical communicationsystems or disinfection systems. The terms “visible”, “visible light” or “visible emission” and similar terms refer to light having one or more wavelengths in the range of about 380-780 nm. Herein, UV may especially refer to a wavelength selected from the range of 190-380 nm, such as 200-380 nm. Herein, IR (infrared) may especially refer to radiation having a wavelength selected from the range of 780-3000 nm, such as 780-2000 nm, e.g. a wavelength up to about 1500 nm, like a wavelength of at least 900 nm, though in specific embodiments other wavelengths may also be possible. The terms “light” and “radiation” are herein interchangeably used, unless clear from the context that the term “light” only refers to visible light. The terms “light” and “radiation” may thus refer to UV radiation, visible light, and IR radiation. In specific 2023PF80436 47 embodiments, especially for lighting applications, the terms “light” and “radiation” refer to (at least) visible light. The terms “blue light” or “blue emission” especially relates to light having a wavelength in the range of about 440-495 nm (including some violet and cyan hues). Theterms “green light” or “green emission” especially relate to light having a wavelength in therange of about 495-570 nm. The terms “yellow light” or “yellow emission” especially relate to light having a wavelength in the range of about 570-590 nm. The phrase “light having one or more wavelengths in a wavelength range” and similar phrases may especially indicate that the indicated light (or radiation) has a spectral power distribution with at least intensity or intensities at these one or more wavelengths in the indicate wavelength range. For instance, a blue emitting solid state light source will have a spectral power distribution with intensities at one or more wavelengths in the 440-495 nm wavelength range. As described above, in embodiments, the light generating system may further comprise a control system. In embodiments, the control system may be configured to control the spectral power distribution of the system light by (individually) controlling the light generating devices. Furthermore, in embodiments, the control system may be configured to control the correlated color temperature of the system light by (individually) controlling the light generating devices. In some embodiments, the control system (especially the polarization control system) may be configured to control one or more of the first light generating device, the second light generating device, and the third light generating device, such that in a first operational mode the system light may have a first correlated color temperature (CCT1). Additionally or alternatively, in embodiments, the control system (especially the polarization control system) may be configured to control one or more of the first light generating device, the second light generating device, and the third light generating device, such that in a second operational mode the system light may have a second correlated color temperature (CCT2). Especially, in embodiment, the control system may be configured to individually control the light generating devices, such that the CCT may be altered fromCCT1 in the first operational mode to CCT2 in the second operational mode, and vice versa.Further, in embodiments, CCT2-CCT1≥250 K, like CCT2-CCT1≥500 K, such as CCT2- CCT1≥750 K, like, CCT2-CCT1≥1000 K. Especially, in embodiments, CCT2-CCT1≥1500 K. Further, in embodiments, CCT2-CCT1 may be at most 5000K, such as at most 3000K, like at most 2500K. The term “controlling” and similar terms especially refer at least to determining the behavior or supervising the running of an element. Hence, herein 2023PF80436 48 “controlling” and similar terms may e.g. refer to imposing behavior to the element (determining the behavior or supervising the running of an element), etc., such as e.g. measuring, displaying, actuating, opening, shifting, changing temperature, etc.. Beyond that, the term “controlling” and similar terms may additionally include monitoring. Hence, the term “controlling” and similar terms may include imposing behavior on an element and also imposing behavior on an element and monitoring the element. The controlling of the element can be done with a control system, which may also be indicated as “controller”. The control system and the element may thus at least temporarily, or permanently, functionally be coupled. The element may comprise the control system. In embodiments, the control system and element may not be physically coupled. Control can be done via wired and / or wireless control. The term “control system” may also refer to a plurality of different control systems, which especially are functionally coupled, and of which e.g. one control system may be a master control system and one or more others may be slave control systems. A control system may comprise or may be functionally coupled to a user interface. The control system may also be configured to receive and execute instructions from a remote control. In embodiments, the control system may be controlled via an App on a device, such as a portable device, like a Smartphone or I-phone, a tablet, etc.. The device is thus not necessarily coupled to the lighting system, but may be (temporarily) functionally coupled to the lighting system. Hence, in embodiments the control system may (also) be configured to be controlled by an App on a remote device. In such embodiments the control system of the lighting system may be a slave control system or control in a slave mode. For instance, thelighting system may be identifiable with a code, especially a unique code for the respectivelighting system. The control system of the lighting system may be configured to be controlled by an external control system which has access to the lighting system on the basis of knowledge (input by a user interface of with an optical sensor (e.g. QR code reader) of the (unique) code. The lighting system may also comprise means for communicating with other systems or devices, such as on the basis of Bluetooth, Thread, WIFI, LiFi, ZigBee, BLE or WiMAX, or another wireless technology. The system, or apparatus, or device may execute an action in a “mode” or “operation mode” or “mode of operation” or “operational mode”. The term “operational mode may also be indicated as “controlling mode”. Likewise, in a method an action or stage, or step may be executed in a “mode” or “operation mode” or “mode of operation” or “operational mode”. This does not exclude that the system, or apparatus, or device may also 2023PF80436 49 be adapted for providing another controlling mode, or a plurality of other controlling modes. Likewise, this may not exclude that before executing the mode and / or after executing the mode one or more other modes may be executed. However, in embodiments a control system may be available, that is adapted to provide at least the controlling mode. Would other modes be available, the choice of such modes may especially be executed via a user interface, though other options, like executing a mode in dependence of a sensor signal or a (time) scheme, may also be possible. The operation mode may in embodiments also refer to a system, or apparatus, or device, that can only operate in a single operation mode (i.e. “on”, without further tunability). Hence, in embodiments, the (polarization) control system may control in dependence of one or more of an input signal of a user interface, a sensor signal (of a sensor), and a timer. The term “timer” may refer to a clock and / or a predetermined time scheme. In yet a further aspect, the invention also provides a lamp or a luminaire comprising the light generating system as defined herein. The luminaire may further comprise a housing, optical elements, louvres, etc. etc... The lamp or luminaire may further comprise a housing enclosing the light generating system. The lamp or luminaire may comprise a light window in the housing or a housing opening, through which the system light may escape from the housing. In yet a further aspect, the invention also provides a projection device comprising the light generating system as defined herein. Especially, a projection device or “projector” or “image projector” may be an optical device that projects an image (or moving images) onto a surface, such as e.g. a projection screen. The projection device may include one or more light generating systems such as described herein. Hence, in an aspect the invention also provides a lighting device selected from the group of a lamp, a luminaire, a projector device, a disinfection device, a photochemical reactor, and an optical wireless communication device, comprising the light generating system as defined herein. The lighting device may comprise a housing or a carrier, configured to house or support, one or more elements of the light generating system. For instance, in embodiments the lighting device may comprise a housing or a carrier, configured to house or support one or more of the light generating devices, the luminescent element, the diffuser system, the control system, the polarization control system, and the optics. In embodiments, the invention may thus comprise an optical wireless communication device comprising the light generating system. In such embodiments, one or more of the first light generating device, the second light generating device, and the third light generating device may especially comprise a high frequency laser and / or may be amplitude modulated. In specific embodiments, especially the 2023PF80436 50 third light generating device may comprise a high frequency laser and / or may be amplitude modulated. Such embodiments may be beneficial as in such embodiments the light generating device providing the fraction of (blue laser) diffused device light to the reflective diffuser is modulated, which is generally faster in their temporal response (i.e., in their decay rate) than luminescent material. BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the invention will now be described, by way of example only, with reference to the accompanying schematic drawings in which corresponding reference symbols indicate corresponding parts, and in which: Fig.1-5 schematically depict some embodiments of the light generating system. Fig.6 schematically depicts some applications of the light generating system in lighting devices. The schematic drawings are not necessarily to scale. DETAILED DESCRIPTION OF THE EMBODIMENTS Fig.1 schematically depicts a light generating system 1000 comprising light generating devices 100, a luminescent element 200, a control system 300, optics 500, a diffuser system 1710, and a light exit 1090. Especially, each of the light generating devices 100 may comprise a solid-state light source. More especially, a first light generating device 110 may be configured to provide first device light 111 having a first centroid wavelength (λc1). Therefore, in embodiments, the first light generating device 110 may comprise a first solid-state light source, especially the first light generating device 110 may comprises a first laser bank comprising a plurality of first lasers 10. Further, a second light generating device 120 may be configured to provide second device light 121 having a second centroid wavelength (λc2). Therefore, in embodiments, the second light generating device 120 may comprise a second solid-state light source, especially the second light generating device 120 may comprise asecond laser bank comprising a plurality of second lasers 20. Yet further, a third lightgenerating device 130 may be configured to provide third device light 131 having a third centroid wavelength (λc3). Therefore, in embodiments, the third light generating device 130 may comprise a third solid-state light source, especially the third light generating device 130 may comprises a third laser bank comprising a plurality of third lasers 30. In embodiments, 2023PF80436 51 the first centroid wavelength (λc1), the second centroid wavelength (λc2), and the third centroid wavelength (λc3) may be individually selected from the wavelength range of 440-490 nm. In further embodiments, λc3≠λc1 and λc3≠λc2. The optics 500 may comprise redirection optics 510. Especially, the redirection optics 510 may comprise one or more polarization based redirection optics PBS1,PBS2,PBS3 and one or more dichroic based redirection optics DBS1,DBS2,DBS3. In embodiments, the first device light 111, the second device light 121, and the third device light 131 reaching the redirection optics 510 may comprise linear polarized light. Especially, in such embodiments, the first device light 111 and the second device light 121 (reaching the redirection optics 510) may have different linear polarizations. The luminescent element 200 may comprise a (first) luminescent material 210. In embodiments, the (first) luminescent material 210 may be configured to convert at least part of device light received by the luminescent element 200 into (first) luminescent material light 201(,211). Furthermore, in embodiments, the diffuser system 1710 may comprise an arrangement of a polarization converter 720 and a diffuser 710. Especially, the diffuser system 1710 (especially the diffuser 710) may be configured to diffuse at least part of the third device light 131 received by the diffuser system 1710 into diffused device light 711. Especially, in such embodiments, the diffused device light 711 may have a linear polarization different from the linear polarization of the third device light 131 received by the diffuser system 1710. Yet further, in embodiments, the diffuser system 1710 may comprise a beam profiler 730 configured between the polarization converter 720 and the diffuser710. In alternative embodiments (not depicted) the beam profiler 730 may be configured between the polarization converter 720 and the second polarizing beam splitter PBS2. Especially, in embodiments, the beam profiler 730 may be configured to adapt a light radiance distribution of the diffused device light 711 received by the beam profiler 730. In embodiments, a first polarizing beam splitter PBS1 (or “first polarizing beam combiner”) may be configured to combine the first device light 111 and the second device light 121 into combined device light 116. Yet further, in embodiments, one or more further polarizing beam splitters PBS2,PBS3 may be configured to direct third device light 131 (received by the one or more further polarizing beam splitters PBS2,PBS3) in an optical path to the luminescent element 200 in dependence of the linear polarization of the third device light 131. Additionally (as 2023PF80436 52 depicted here) or alternatively, in embodiments, the one or more further polarizing beam splitters PBS2,PBS3 may be configured to direct third device light 131 (received by the one or more further polarizing beam splitters PBS2,PBS3) in an optical path to the diffuser system 1710 in dependence of the linear polarization of the third device light 131. Additionally, in embodiments, the one or more further polarizing beam splitters PBS2,PBS3 may be configured to split third device light 131 propagating to the diffuser system 1710 from diffused device light 711 emanating from the diffuser system 1710 (in dependence of the linear polarization). Conversely, in embodiments, the one or more dichroic based redirection optics DBS1,DBS1,DBS3 may be configured to direct the combined device light 116, received from the first polarizing beam splitter PBS1 in an optical path to the luminescent element 200. Additionally, in embodiments, the one or more dichroic based redirection optics DBS1,DBS1,DBS3 may be configured to split the combined device light 116 (propagating to the luminescent element 200) from the luminescent material light 201 (emanating from the luminescent element 200). Yet additionally, in embodiments, the one or more dichroic based redirection optics DBS1,DBS1,DBS3 may be configured to direct the luminescent material light 201 and the diffused device light 711 in an optical path to the light exit 1090. Especially, in embodiments, a first dichroic beam splitter DBS1 may be configured downstream of the first polarizing beam splitter PBS1 and upstream of the luminescent element 200. The first dichroic beam splitter DBS1 may be configured to combine the combined device light 116 (received from the first polarizing beam splitter PBS1) and at least part of the third device light 131 (received from the one or more further polarizing beam splitters PBS2,PBS3) into a same optical path to the luminescent element 200. In embodiments, the light generating system 1000 may be configured to generate in an operational mode system light 1001. Especially, in such embodiments, the system light 1001 may comprise at least part of the luminescent material light 201 and at least part of the diffused light 711. More especially, in embodiments, the system light 1001 may be white light. In specific embodiments, such as depicted here, the one or more further polarizing beam splitters PBS2,PBS3 may comprise a second polarizing beam splitter PBS2 and a third polarizing beam splitter PBS3. In embodiments, the second polarizing beam splitter PBS2 may be configured in an optical path between the third light generating device 130 and the diffuser system 1710. 2023PF80436 53 As depicted in Figs.1,3, and 4, in embodiments, the second polarizing beam splitter PBS2 may especially be configured to (a) at least partially transmit third device light 131 received by the second polarizing beam splitter PBS2, and (b) at least partially reflect diffused device light 711 received by the second polarizing beam splitter PBS2 in dependence of its polarization. Alternatively, as depicted in Figs.2 and 5, in embodiments, the second polarizing beam splitter may be configured to (a) at least partially reflect third device light 131 received by the second polarizing beam splitter PBS2, and (b) at least partially transmit diffused device light 711 received by the second polarizing beam splitter PBS2 in dependence of its polarization. Further, in embodiments, the third polarizing beam splitter PBS3 may be configured in an optical path between the third light generating device 130 and the second polarizing beam splitter PBS2, such as depicted in Figs.1, 3 and 4. Alternatively, inembodiments, the second polarizing beam splitter PBS2 and the third polarizing beam splitterPBS3 may be (spatially) combined into a single polarization based redirection optical element, such as depicted in Figs.2 and 5. In embodiments, the third polarizing beam splitter PBS3 may especially be configured to, in dependence of the linear polarization of the third device light 131, direct afirst part of third device light 131a (received by the third polarizing beam splitter PBS3) in anoptical path to the luminescent element 200. Furthermore, in embodiments, the third polarizing beam splitter PBS3 may be configured to, in dependence of the linear polarization of the third device light 131, direct a second part of third device light 131b (received by the third polarizing beam splitter PBS3) in an optical path to the diffuser system 1710. In embodiments, one of the first part of the third device light 131a and the second part of the third device light 131b may comprise p-polarized light, whereas the other one of the first part of the third device light 131a and the second part of the third device light 131b may comprise s-polarized light. In the figures, s-polarized light is indicated with a black dot (on the arrow indicating the direction of the light), whereas p-polarized light is indicated with a black arrow (on the arrow indicating the direction of the light). Furthermore, in embodiments, the control system 300 may be configured to control a spectral power distribution of the system light 1001. Especially, in embodiments, the control system 300 may be configured to (individually) control (one or more of) the first light generating device 110, the second light generating device 120, and the third light generating device 130. 2023PF80436 54 In embodiments, the one or more dichroic based redirection optics DBS1,DBS2,DBS3 may further comprise a second dichroic beam splitter DBS2. Especially, the second dichroic beam splitter DBS2 may be configured in an optical path between the first dichroic beam splitter DBS1 and the luminescent element 200. In embodiments, such as depicted in Figs.1,3, and 5, the second dichroic beam splitter DBS2 may be configured to at least partially transmit device light 111,121,131 and optionally diffused device light 711 received by the second dichroic beam splitter DBS2. Alternatively, in embodiments such as depicted in Fig.2 and 4, the second dichroic beam splitter DBS2 may be configured to at least partially reflect device light 111,121,131 and optionally diffused device light 711 received by the second dichroic beam splitter DBS2. Further, in embodiments, such as depicted in Figs.1,3, and 5, the second dichroic beam splitter DBS2 may be configured to at least partially reflect luminescent material light 201 received by the second dichroic beamsplitter DBS2. Alternatively, in embodiments such as depicted in Fig. 2 and 4, the seconddichroic beam splitter DBS2 may be configured to at least partially transmit luminescent material light 201 received by the second dichroic beam splitter DBS2. Further, in embodiments, the light generating system 1000 may comprise a polarization control system 600. The polarization control system 600 may especially be configured to control the polarization of (at least) the third device light 131 (reaching the third polarizing beam splitter PBS3). Therefore, in embodiments, the polarization control system may comprise a birefringent rotator 610. In embodiments, the birefringent rotator may be configured downstream of the third light generating device 130 and upstream of the one or more further polarizing beam splitters PBS2,PBS3. The polarization control system 600 may, in embodiments, be configured to control rotation of the birefringent rotator 610 (and as such may control the polarization of the third device light 131). In specific embodiments, the birefringent rotator 610 may comprise a λ / 2 waveplate. Additionally or alternatively, in embodiments, the polarization control system 600 may comprise an actuator 620. In embodiments, the actuator 620 may be configured to rotate the third light generating device 130. In such embodiments, the polarization control system 600 may be configured to control the actuator 620. Yet additionally or alternatively, in embodiments, the polarization control system 600 may be configured such that an (rotational) orientation of the third light generating device 130 may be factory set. Similarly, in embodiments, the polarization control system 600 may be configured such that an (rotational) orientation of the birefringent rotator 610 may be factory set. 2023PF80436 55 Furthermore, in embodiments, the optics 500 may comprise one or more of collimation (“or condensing”) optics 560 and integrating (or “homogenizing”) optics 570. Herein, reference 750 may refer to a rotating element, such as e.g. a phosphor wheel, a rotating rod, or a rotating disc. Hence, in embodiments, the luminescent element 200 and / or the diffuser 710 may be configured on the (same or their separate respective) rotating element(s) 750. Furthermore, in embodiments, luminescent element 200 (and optionally the diffuser 710) may be configured in thermal contact with a thermally conductive material. The light generating system 1000 as depicted in Fig.1 especially comprises two discrete dichroic based redirection optics (DBS1 and DBS2) and three discrete polarization based redirection optics (PBS1, PBS2, and PBS3). Here, the first light generating device 110 and the second light generating device 120 may be configured to provide s- polarized first device light 111 and p-polarized second device light 121, respectively, which may be combined into combined device light 116 by the first polarizing beam splitter PBS1. Subsequently, the combined device light 116 may be transmitted by both the first dichroic beam splitter DBS1 and the second dichroic beam splitter DBS2 to the luminescent element 200. The polarization of the third device light 131 with a wavelength different from that of the first and second device light 111,121 may be adjusted via the birefringent rotator 610. Here, the s-polarized part of the third device light 131a may be reflected towards the luminescent element 200 thanks to dichroic mixing with the light from the first and second light generating devices 110,120 via the first dichroic beam splitter DBS1. On the other hand the p-polarized part of the third device light 131b may be transmitted through the third polarizing beam splitter PB3 and the second polarizing beam splitter PBS2 to the diffuser system 1710. The reflected diffused device light 711 may be (substantially) reflected from the second polarizing beam splitter PBS2 thanks to the polarization rotation by the polarization converter (λ / 4 waveplate) 720. Ultimately, the second dichroic beam splitter DBS2 may combine the luminescent material light 201 (yellow) and the diffused (blue) device light 711 into mixed white output system light 1001. In embodiments, the one or more dichroic based redirection optics DBS1,DBS2,DBS3 may further comprise a third dichroic beam splitter DBS3. Especially, the third dichroic beam splitter DBS3 may be configured downstream of both the second dichroic beam splitter DBS2 and the third polarizing beam splitter PBS3. Moreover, in some embodiments, the second polarizing beam splitter PBS2 and the third dichroic beam splitter DBS3 may be (spatially) combined into a single dichroic based redirection optical element, such as depicted in Figs.3 and 4. 2023PF80436 56 In embodiments, the third dichroic beam splitter DBS3 may especially be configured to direct the luminescent material light 201 and the diffused device light 711 in an optical path to the light exit 1090. Furthermore, in embodiments such as depicted in Fig.2, the third dichroic beam splitter DBS3 may be configured to at least partially transmit diffused device light 711 received by the third dichroic beam splitter DBS3. Alternatively, in embodiments such as depicted in Figs.3-5, the third dichroic beam splitter DBS3 may be configured to at least partially reflect diffused device light 711 received by the third dichroic beam splitter DBS3. Moreover, in embodiments such as depicted in Fig.2, the third dichroic beam splitter DBS3 may be configured to at least partially reflect luminescent material light 201 received by the third dichroic beam splitter DBS3. Alternatively, in embodiments such as depicted in Figs.3-5, the third dichroic beam splitter DBS3 may be configured to at least partially transmit luminescent material light 201 received by the third dichroic beam splitter DBS3. The light generating system 1000 as depicted in Fig.2 especially comprises three discrete dichroic based redirection optics (DBS1, DBS2, and DBS3) and two discrete polarization based redirection optics (PBS1, and the combined PBS2 and PBS3). The first device light 111 and second device light 121 may propagate to the luminescent element 200in a similar manner as in Fig. 1. However, here, the combined device light 116 and the thirddevice light 131 may be combined by the first dichroic beam splitter DBS1 and may be reflected by the second dichroic beam splitter DBS2 to the luminescent element 200. Furthermore, the s-polarized part of the third device light 131b may at least partly be reflected towards the diffuser system 1710 by the combined PBS3 and PBS2. On the other hand the p-polarized part of the third device light 131a may be transmitted through the combined PBS3 and PBS2 and may be reflected to the luminescent element 200 thanks to dichroic mixing with the light from the first and second light generating devices 110,120 via the first dichroic beam splitter DBS1. The reflected diffused device light 711 may be (substantially) transmitted by the combined PBS3 and PBS2 thanks to the polarization rotation by the polarization converter (λ / 4 waveplate) 720. In embodiments, as depicted in Fig.3, the luminescent material light 201 and the diffused device light 711 may be combined by the second polarizing beam splitter PBS2, rather than the second dichroic beam splitter DBS2. Therefore, the second polarizing beam splitter PBS2 may now also have an additional requirement on being transmissive for the luminescent material light 201 by being combined with the third dichroic beam splitter DBS3. 2023PF80436 57 In embodiments, as depicted in Fig.4, the second dichroic beam splitter DBS2 may be transmissive for luminescent material light 201 and reflective for device light 116,131. In such embodiments the second polarizing beam splitter PBS2 may especially have the additional requirement of being transmissive for luminescent material light 201 by being combined with the third dichroic beam splitter DBS3. The light generating system 1000 as depicted in Fig.5 (as compared to the light generating system 1000 as depicted in Fig.2) may be configured such that the second dichroic beam splitter DBS2 may be transmissive for the combined device light 116 and the third device light 131, whereas the second dichroic beam splitter DBS2 may be reflective for the luminescent material light 201. Furthermore, the third dichroic beam splitter DBS3 may be transmissive for luminescent material light 201 and reflective for third device light 131. Fig.6 schematically depicts an embodiment of a luminaire 2 comprising the light generating system 1000 as described above. Reference 301 indicates a user interface which may be functionally coupled with the control system 300 comprised by or functionally coupled to the light generating system 1000. Fig.6 also schematically depicts an embodiment of lamp 1 comprising the light generating system 1000. Reference 3 indicates a projector device or projector system, which may be used to project images, such as at a wall, which may also comprise the light generating system 1000. Hence, Fig.6 schematically depicts embodiments of a lighting device 1200 selected from the group of a lamp 1, a luminaire 2, a projector device 3, a disinfection device, a photochemical reactor, and an optical wireless communication device, comprising the light generating system 1000 as described herein. In embodiments, such lighting device may be a lamp 1, a luminaire 2, a projector device 3, a disinfection device, an automotive lighting device, or an optical wireless communication device. Lighting device light escaping from the lighting device 1200 is indicated with reference 1201. Lighting device light 1201 may essentially consist of system light 1001, and may in specific embodiments thus be system light 1001. Reference 1300 refers to a space, such as a room. Reference 1305 refers to a floor and reference 1310 to a ceiling; reference 1307 refers to a wall. The term “plurality” refers to two or more. The terms “substantially” or “essentially” herein, and similar terms, will be understood by the person skilled in the art. The terms “substantially” or “essentially” may also include embodiments with “entirely”, “completely”, “all”, etc. Hence, in embodiments the adjective substantially or essentially may also be removed. Where applicable, the term 2023PF80436 58 “substantially” or the term “essentially” may also relate to 90% or higher, such as 95% or higher, especially 99% or higher, even more especially 99.5% or higher, including 100%. The term “comprise” also includes embodiments wherein the term “comprises” means “consists of”. The term “and / or” especially relates to one or more of the items mentioned before and after “and / or”. For instance, a phrase “item 1 and / or item 2” and similar phrases may relate to one or more of item 1 and item 2. The term "comprising" may in an embodiment refer to "consisting of" but may in another embodiment also refer to "containing at least the defined species and optionally one or more other species". Furthermore, the terms first, second, third and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein. The devices, apparatus, or systems may herein amongst others be described during operation. As will be clear to the person skilled in the art, the invention is not limited to methods of operation, or devices, apparatus, or systems in operation. It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Use of the verb "to comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise”, “comprising”, and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of “including, but not limited to”. The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a device claim, or an apparatus claim, or a system claim, enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain measures are 2023PF80436 59 recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. In yet a further aspect, the invention (thus) provides a software product, which, when running on a computer is capable of bringing about (one or more embodiments of) the method as described herein. The invention also provides a control system that may control the device, apparatus, or system, or that may execute the herein described method or process. Yet further, the invention also provides a computer program product, when running on a computer which is functionally coupled to or comprised by the device, apparatus, or system, controls one or more controllable elements of such device, apparatus, or system. The invention further applies to a device, apparatus, or system comprising one or more of the characterizing features described in the description and / or shown in the attached drawings. The invention further pertains to a method or process comprising one ormore of the characterizing features described in the description and / or shown in the attacheddrawings. The various aspects discussed in this patent can be combined in order to provide additional advantages. Further, the person skilled in the art will understand that embodiments can be combined, and that also more than two embodiments can be combined.Furthermore, some of the features can form the basis for one or more divisional applications.

Claims

2023PF80436 60 CLAIMS:

1. A light generating system (1000) comprising light generating devices(110,120,130), a luminescent element (200), a control system (300), optics (500), a polarization control system (600), a diffuser system (1710), and a light exit (1090); wherein:- each of the light generating devices (110,120,130) comprise a solid-state lightsource; wherein (i) a first light generating device (110) is configured to provide first device light (111) having a first centroid wavelength (λc1), (ii) a second light generating device (120) is configured to provide second device light (121) having a second centroid wavelength (λc2), and (iii) a third light generating device (130) is configured to provide third device light (131) having a third centroid wavelength (λc3); wherein the first centroid wavelength (λc1), the second centroid wavelength (λc2), and the third centroid wavelength (λc3) are individually selected from the wavelength range of 440-490 nm; wherein λc3≠λc1 and λc3≠λc2; the optics (500) comprise redirection optics (510); wherein the first device light (111), the second device light (121), and the third device light (131) reaching the redirection optics (510) comprise linear polarized light, with the first device light (111) and the second device light (121) having different linear polarizations;- the luminescent element (200) comprises a luminescent material (210)configured to convert at least part of device light received by the luminescent element (200) into luminescent material light (201);- the diffuser system (1710) comprises an arrangement of a polarizationconverter (720) and a diffuser (710); wherein the diffuser system (1710) is configured to diffuse at least part of the third device light (131) received by the diffuser system (1710) into diffused device light (711);- the redirection optics (510) comprise one or more polarization basedredirection optics (PBS1,PBS2,PBS3) and one or more dichroic based redirection optics (DBS1,DBS2,DBS3);- a first polarizing beam splitter (PBS1) is configured to combine the firstdevice light (111) and the second device light (121) into combined device light (116);- one or more further polarizing beam splitters (PBS2,PBS3) are configured to(a) direct third device light (131) in an optical path to the luminescent element (200) and in2023PF80436 61 an optical path to the diffuser system (1710) in dependence of the linear polarization of the third device light (131), and (b) split third device light (131) propagating to the diffuser system (1710) from diffused device light (711) emanating from the diffuser system (1710);- the one or more dichroic based redirection optics (DBS1,DBS2,DBS3) areconfigured to (a) direct the combined device light (116) and at least part of the third device light (131), received from the first polarizing beam splitter (PBS1) in an optical path to the luminescent element (200), (b) split the combined device light (116) propagating to the luminescent element (200) from the luminescent material light (201) emanating from the luminescent element (200), and (c) direct the luminescent material light (201) and the diffused device light (711) in an optical path to the light exit (1090);- the light generating system (1000) is configured to generate in an operationalmode system light (1001) comprising at least part of the luminescent material light (201) andat least part of the diffused light (711), and wherein the system light (1001) is white light; and- the control system (300) is configured to control a spectral power distributionof the system light (1001).

2. The light generating system according to claim 1, wherein the light generatingdevices (110,120,130) are configured to operate at rated forward currents, wherein |λc1-λc3|≥5 nm, and wherein |λc2-λc3|≥5 nm.

3. The light generating system according to any one of the preceding claims,wherein a first dichroic beam splitter (DBS1) is configured to combine the combined device light (116) received from the first polarizing beam splitter (PBS1) and at least part of the third device light (131) received from the one or more further polarizing beam splitters (PBS2,PBS3) into a same optical path to the luminescent element (200).

4. The light generating system according to any one of the preceding claims,wherein the one or more further polarizing beam splitters (PBS2,PBS3) comprise a second polarizing beam splitter (PBS2) and a third polarizing beam splitter (PBS3); wherein:- (i) the second polarizing beam splitter (PBS2) is configured to (a) at leastpartially transmit third device light (131) received by the second polarizing beam splitter (PBS2), and (b) at least partially reflect diffused device light (711) received by the second polarizing beam splitter (PBS2) in dependence of its polarization; or (ii) the second polarizing beam splitter (PBS2) is configured to (a) at least partially reflect third device light2023PF80436 62 (131) received by the second polarizing beam splitter (PBS2), and (b) at least partially transmit diffused device light (711) received by the second polarizing beam splitter (PBS2) in dependence of its polarization; and- the third polarizing beam splitter (PBS3) is configured to, in dependence of thelinear polarization of the third device light (131), (a) direct a first part of third device light (131a) in an optical path to the luminescent element (200), and (b) direct a second part of third device light (131b) in an optical path to the diffuser system (1710).

5. The light generating system according to claim 4, wherein the secondpolarizing beam splitter (PBS2) and the third polarizing beam splitter (PBS3) are combined into a single polarization based redirection optical element.

6. The light generating system according to any one of the preceding claims,wherein:- a second dichroic beam splitter (DBS2) is configured to (a) at least partiallytransmit device light (111, 121, 131) and optionally diffused device light (711) received by the second dichroic beam splitter (DBS2), and (b) at least partially reflect luminescentmaterial light (201) received by the second dichroic beam splitter (DBS2); or- a second dichroic beam splitter (DBS2) is configured to (a) at least partiallyreflect device light (111, 121, 131) and optionally diffused device light (711) received by the second dichroic beam splitter (DBS2), and (b) at least partially transmit luminescent material light (201) received by the second dichroic beam splitter (DBS2).

7. The light generating system according to any one of the preceding claims,wherein- a third dichroic beam splitter (DBS3) is configured to direct the luminescentmaterial light (201) and the diffused device light (711) in an optical path to the light exit (1090); wherein the third dichroic beam splitter (DBS3) is configured to (a) at least partially transmit diffused device light (711) received by the third dichroic beam splitter (DBS3), and (b) at least partially reflect luminescent material light (201) received by the third dichroic beam splitter (DBS3); or- a third dichroic beam splitter (DBS3) is configured to (a) at least partiallyreflect diffused device light (711) received by the third dichroic beam splitter (DBS3), and2023PF80436 63 (b) at least partially transmit luminescent material light (201) received by the third dichroic beam splitter (DBS3).

8. The light generating system according to claim 7, wherein the secondpolarizing beam splitter (PBS2) as defined in claim 4 and the third dichroic beam splitter (DBS3) are combined into a single redirection optical element.

9. The light generating system according to any one of the preceding claims,wherein the polarization control system (600) comprises one or more of:- a birefringent rotator (610) configured downstream of the third lightgenerating device (130) and upstream of the one or more further polarizing beam splitters (PBS2,PBS3), wherein the polarization control system (600) is configured to control rotation of the birefringent rotator (610); and wherein the birefringent rotator (610) comprises a λ / 2 waveplate;- an actuator (620) configured to rotate the third light generating device (130),wherein the polarization control system (600) is configured to control the actuator (630).

10. The light generating system according to any one of the preceding claims,wherein the solid state light source is selected from the group comprising a light-emitting diode, a laser diode, and a superluminescent diode, wherein the luminescent element (200) is configured in thermal contact with a thermally conductive material; and wherein the luminescent element (200) at least comprises a first luminescent material (210) of the type A3B5O12:Ce, wherein A comprises one or more of Y, La, Gd, Tb and Lu, and wherein B comprises one or more of Al, Ga, In and Sc.

11. The light generating system according to any one of the preceding claims,wherein the first light generating device (110) comprises a first laser bank comprising a plurality of first lasers (10), wherein the second light generating device (120) comprises a second laser bank comprising a plurality of second lasers (20), and wherein the third light generating device (130) comprises a third laser bank comprising a plurality of third lasers (30).

12. The light generating system according to any one of the preceding claims,wherein in an operational mode of the light generating system (1000) the system light (1001)2023PF80436 64 is white light having a correlated color temperature selected from the range of 6000-10000 K and a color rendering index of at least 65.

13. The light generating system according to any one of the preceding claims,wherein the control system (300) is configured to control the first light generating device (110), the second light generating device (120), and the third light generating device (130), such that: (i) in a first operational mode the system light (1001) has a first correlated color temperature (CCT1), and (ii) in a second operational mode the system light (1001) has a second correlated color temperature (CCT2); and wherein CCT2-CCT1≥1000K.

14. The light generating system according to any one of the preceding claims,wherein the control system (300) is configured to control the spectral power distribution of the system light (1001) in dependence of one or more of an input signal of a user interface, a sensor signal, and a timer.

15. A lighting device (1200) selected from the group of a lamp (1), a luminaire(2), a projector device (3), an automotive lighting device, comprising the light generating system (1000) according to any one of the preceding claims.

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