Laser-phosphor engine with three color channels and two constant power blue sources

Abstract

The invention provides a light generating system (1000) comprising a first light generating device (110) configured to provide first device light (111), a second light generating device (120) configured to provide second device light (121), a third light generating device (130) configured to provide third device light (131), a luminescent material (200), optics (500), a polarization control system (600), a first diffuser assembly (1700), a second diffuser assembly (2700), and a light exit (1090); wherein: (A) the luminescent material (200) is configured to convert at least part of first device light (111) and at least part of second device light (121) into luminescent material light (201); (B) the first diffuser assembly (1700) comprises a first diffuser (1710) configured to diffuse at least part of second device light (121) into diffused second device light (721); (C) the second diffuser assembly (2700) comprises a second diffuser (2710) configured to diffuse at least part of third device light (131) into diffused third device light (731); (D) the optics (500) comprise a first redirection optical element (510) and one or more further redirection optical elements (505); wherein the first redirection optical element (510) is configured to combine first device light (111) and a first part of second device light (121a), comprising the second linear polarization into a first optical path (1100) to one or more further redirection optical elements (505); wherein the first redirection optical element (510) is configured to direct a second part of the second device light (121b) comprising a first linear polarization, into an second optical path (1200) to the first diffuser assembly (1700); and (E) the light generating system (1000) is configured to generate white system light (1001) comprising the luminescent material light (201), the diffused second device light (721), and the diffused third device light (731).

Description

[0001]2024PF80055 1 LASER-PHOSPHOR ENGINE WITH THREE COLOR CHANNELS AND TWO CONSTANT POWER BLUE SOURCES 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 Lighting fixtures are known in the art. US2019235369A1, for instance, describes a system for solid state illumination comprising at least three solid state light sources, means for color conversion, means for combining light beams, and means for color filtering, a first light source providing a first light beam that is converted by the means for color conversion into at least one converted light beam, a second and a third assisting light source providing a second and third light beam respectively, the second assisting light source being a red light source and the third assisting light source being a blue light source, the atleast one converted light beam being combined with the second- and / or third light beam, bythe means for combining light beams, into a composed light beam that is filtered by the means for color filtering. US2019 / 391475A1 discloses an illumination device that includes a blue laser, a red laser, a diffusely reflecting element configured to diffuse and reflect a part of light from the blue laser, a phosphor, a bandpass filter provided to the phosphor to transmit light from the red laser, a polarization splitting / combining element having a polarization split function, and a first wave plate disposed between the polarization splitting / combining element and the diffusely reflecting element. The polarization splitting / combining element guides a blue first polarization component to the diffusely reflecting element and guides a blue second polarization component to the phosphor. Then, the polarization splitting / combining element combines the fluorescent light, the light from the red laser emitting element entering a second surface of the phosphor and then emitted from a first surface, and blue diffused light with each other to generate illumination light. JP2020008722A discloses a projector having a blue laser, a red laser, a light combining element, a diffuser, a fluorescent element and a polarization element for splitting 2024PF80055 2 blue laser light based on polarization. Part of the blue light is converted by the fluorescent element and another part is diffused by the diffuser. Red laser light is directed by the polarization element to the fluorescent element and subsequently reflected back to the polarization element. The diffused blue light, the converted blue light and the reflected red light exit the projector as combined light. SUMMARY OF THE INVENTION 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. However, such light engine may be capable to generate only a single color point as defined by the luminescentconverter. Creation of a product range providing different color points may be difficult as itmay require 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 may be limited by the components used, the engine volume may be large due to the many components, and the system cost may be 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, resulting in relatively high losses of diffused blue light at the beam combiner where it is combined with the luminescent light into white output light. In addition, using a single laser source (that may comprise multiple laser diodes) may significantly limit the maximum output power due to size limitations to the optical components. Typically, systems based on the combination of a “blue” color channel and a “yellow” luminescent channel may be able to provide high source brightness, but may lack spectral content in the long wavelength range (“red”) and as a consequence may suffer from a relatively small color gamut and a relatively low color rendering. One approach to increase the color gamut may be to combine red, green and blue lasers dichroically (i.e., RGB laser- based projection sources / systems). However, the efficiency of such systems may be limited by the components used, as typically the electro-optical conversion efficiency of green / yellow lasers may be poor, while in addition the engine volume may be large due to the many components, and the system cost may be high. In addition, the color quality may generally be very poor for such systems. 2024PF80055 3 Hence, in may be desired to provide higher flux high brightness light engines that enable a lower CCT, preferably enabling selection of the CCT from a larger CCT range, with increased color gamut and improved color rendering. In other words, it may be desired to provide architectures that enable optimal use of three laser light sources for any of a range of selectable output (white light) color points. There may also be a need to enable selection of a large range of color temperatures on or close to the BBL, requiring three color channels to be tuned relative to each other, while providing high flux, high luminance, and high efficiency (white) output light. 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 a first light generating device, a second light generating device, a third light generating device, a luminescent material, a control system, optics, a polarization control system, a first diffuser assembly, a second diffuser assembly, and a light exit. In embodiments, the first light generating device may be configured to provide first device light.Especially, in embodiments, the first device light may have a first centroid wavelength (λc1)selected from the wavelength range of 430-490 nm. Further, in embodiments, the first light generating device may comprise a first solid state light source. Similarly, in embodiments, the second light generating device may be configured to provide second device light. Especially, in embodiments, the second device light may have a second centroid wavelength (λc2) selected from the wavelength range of 430-490 nm. Moreover, in embodiments, the second light generating device may comprise a second solid state light source. Yet similarly, in embodiments, the third light generating device may be configured to provide third device light. Especially, in embodiments, the third device light may have a third centroid wavelength (λc3) selected from the wavelength range of 590-780 nm. Further, in embodiments, the third light generating device may comprise a third solid state light source. Furthermore, in embodiments, the first, second, and third solid state light sources may be individually selected from the group comprising laser diodes, superluminescent diodes, and stacked multi- junction light-emitting diodes. Further, in embodiments, the luminescent material may be configured to convert at least part of first device light and at least part of second device light received by the luminescent material into luminescent material light. Yet further, in embodiments, the first diffuser assembly may comprise a first diffuser configured to diffuse 2024PF80055 4 at least part of second device light received by the first diffuser assembly into diffused second device light. Similarly, in embodiments, the second diffuser assembly may comprise asecond diffuser configured to diffuse at least part of third device light received by the seconddiffuser assembly into diffused third device light. Further, in embodiments, the optics may comprise a first redirection optical element and one or more further redirection optical elements. In embodiments, the first redirection optical element may be configured downstream of both the first light generating device and the second light generating device. Further, in embodiments, the first redirection optical element may comprise a polarizing beam splitter (PBS1). In embodiments, the first device light reaching the first redirection optical element may comprise a first linear polarization. Conversely, in embodiments, the second device light reaching the first redirection optical element may comprise a second linear polarization, different from the first linear polarization. Moreover, in embodiments, the first redirection optical element may be configured to combine first device light received by the first redirection optical element and a first part of second device light, (that first part) comprising the second linear polarization, received by the first redirection optical element into a first optical path to one or more of the one or more further redirection optical elements. Further, in embodiments, the first redirection optical element may be configured to direct a second part of the second device light, (that second part) comprising a first linear polarization, received by the first redirection optical element into a second optical path, different from the first optical path, to the first diffuser assembly. Furthermore, in embodiments, the optics comprises the one or more further redirection optical elements. In embodiments, (one or more of the) one or more further redirection optical elements may be configured to direct first device light and the first part of the second device light to the luminescent material. Additionally, in embodiments, (one or more of the) one or more further redirection optical elements may be configured to direct the second part of the second device light to the first diffuser assembly. Additionally, in embodiments, (one or more of the) one or more further redirection optical elements may be configured to direct third device light to the second diffuser assembly. Especially, in such embodiments, the third light generating device and the optics may be configured such that the third device light received by the second diffuser assembly may comprise linear polarized light. Yet additionally, in embodiments, (one or more of the) one or more further redirection optical elements may be configured to direct the luminescent material light, the diffused second device light and the diffused third device light to the light exit. Furthermore, in embodiments, the polarization control system may be configured to control the polarization of one or more of the first device light and the 2024PF80055 5 second device light reaching the first redirection optical element. Moreover, in embodiments, the light generating system may be configured to generate in a first operational mode of the light generating system white system light comprising at least part of the luminescent material light, at least part of the diffused second device light, and at least part of the diffused third device light. Moreover, in embodiments, the control system may be configured to control one or more of a spectral power distribution, a correlated color temperature, a color gamut, and a color rendering index of the system light by controlling the polarization controlsystem. Hence, in specific embodiments, the invention may provide a light generating systemcomprising a first light generating device, a second light generating device, a third light generating device, a luminescent material, a control system, optics, a polarization control system, a first diffuser assembly, a second diffuser assembly, and a light exit; wherein: (A) the first light generating device may be configured to provide first device light having a first centroid wavelength (λc1) selected from the wavelength range of 430-490 nm, wherein the first light generating device may comprise a first solid state light source; (B) the second light generating device may be configured to provide second device light having a second centroid wavelength (λc2) selected from the wavelength range of 430-490 nm, wherein the second light generating device may comprise a second solid state light source; (C) the third light generating device may be configured to provide third device light having a third centroid wavelength (λc3) selected from the wavelength range of 590-780 nm, wherein the third light generating device may comprise a third solid state light source; (D) the first, second, and third solid state light sources may be individually selected from the group comprising laser diodes, superluminescent diodes, and stacked multi-junction light-emitting diodes; (E) theluminescent material may be configured to convert at least part of first device light and atleast part of second device light received by the luminescent material into luminescent material light; (E) the first diffuser assembly may comprise a first diffuser configured to diffuse at least part of second device light received by the first diffuser assembly into diffused second device light; (F) the second diffuser assembly may comprise a second diffuser configured to diffuse at least part of third device light received by the second diffuser assembly into diffused third device light; (G) the optics may comprise a first redirection optical element and one or more further redirection optical elements; wherein the first redirection optical element may be configured downstream of both the first light generating device and the second light generating device; wherein the first redirection optical elementmay comprise a polarizing beam splitter; wherein the first device light reaching the firstredirection optical element may comprise a first linear polarization and wherein the second 2024PF80055 6 device light reaching the first redirection optical element may comprise a second linear polarization, different from the first linear polarization; wherein the first redirection optical element may be configured to combine first device light received by the first redirection optical element and a first part of second device light, (that first part) comprising the second linear polarization, received by the first redirection optical element into a first optical path to one or more of the one or more further redirection optical elements; wherein the first redirection optical element may be configured to direct a second part of the second device light, (that second part) comprising a first linear polarization, received by the first redirection optical element into a second optical path, different from the first optical path, to the first diffuser assembly; (H) the optics (comprising the one or more further redirection optical elements) are (further) configured to: (i) direct first device light and the first part of the second device light to the luminescent material, (ii) direct the second part of the seconddevice light to the first diffuser assembly, (iii) direct third device light to the second diffuserassembly, wherein the third light generating device and the optics may be configured such that the third device light received by the second diffuser assembly comprises linear polarized light, and (iv) direct the luminescent material light, the diffused second device light and the diffused third device light to the light exit; (I) the polarization control system may beconfigured to control the polarization of one or more of the first device light and the seconddevice light reaching the first redirection optical element; (J) the light generating system may be configured to generate in a first operational mode of the light generating system white system light comprising at least part of the luminescent material light, at least part of the diffused second device light, and at least part of the diffused third device light; and (K) the control system may be configured to control one or more of a spectral power distribution, a correlated color temperature, a color gamut, and a color rendering index of the system light by controlling the polarization control system. Such a light generating system may provide a reduced cost, yet high- performing system. The lower cost may be the result of minimization of the number of relatively expensive optical components. Further, the invention may provide system architectures enabling operational modes, which may result in highly efficient use of installed laser diode power. Hence, the invention may enable the realization of compact and highly efficient laser-phosphor light engines that may comprise two laser sources with either substantially the same or with different spectral characteristics that can be operated at constant power, while enabling selection of the output CCT at constant power operation of these two device light sources, and a third laser source with a substantially different center 2024PF80055 7 wavelength relative to the other two laser sources that can be operated at adjustable powers. Such a light generating system may provide CCT selection close to or on the BBL in a much- enlarged range (e.g.2000-10000K) while being operated in continuous wave mode. Thanks to the combination of three laser sources, a luminous flux output well above 30 klm may be realized with existing components and within an acceptable etendue (< 15 mm2sr). It may further provide an intrinsic (eye) safety against malfunctioning of laser light diffusing components or luminescent conversion components. Furthermore, the light generating system may provide alternative architectures compared to prior art, enabling more freedom in choices for high brightness and high-power light source implementations, and providing low- cast architectures that may even eliminate any polarizing beam splitter or waveplate in the system. The light generating system may especially provide white or colored output light having an enlarged color gamut and / or improved color rendering. Furthermore, the light generating system may be operated in continuous wave operation, therewith preventing stroboscopic or flicker effects. Hence, the invention may provide a laser-phosphor engine with three color channels and two constant power blue sources. The light generating system (or “system”) may thus comprise a first light generating device, a second light generating device, a third light generating device, a luminescent material, a control system, optics, a polarization control system, a first diffuser assembly, a second diffuser assembly, and a light exit. Here below, embodiments of the different elements 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 system may comprise light generating devices. 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 light source. 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 also comprise a plurality of first (solid state) light sources. Especially, in specific embodiments, 2024PF80055 8 the first light generating device may comprise a first laser bank. In such embodiments, the first laser bank may comprise a first array comprising a plurality of first solid state lightsources. Especially, in embodiments, the first laser bank may comprise a first arraycomprising a plurality of first lasers. For example, in embodiments, the first array may comprise an n*m array. In such embodiments, n and m may be individually selected from the range of 1-28, such as from the range of 2-20, like from the range of 4-14. However, in embodiments, other array types, such as e.g. an irregular array comprising a different number of lasers per row, may also be applied. 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. Depending on the desired output beam characteristics, additional beam shaping optics may be needed. Note that an array of solid-state light sources may provide multiple light generating devices, such as a first light generating device and a second light generating device. For instance, a subset of laser diodes of an array of laser diodes may be used as first light generating device, and its device light may at least partially follow another optical path than device light of another subset of laser diodes from that array (of laser diodes). Hence, in embodiments a single laser bank may be applied, of which the light is split in multiple portions, effectively providing multiple light generating devices. In general, this may imply the application of optics, allowing to divide the laser light of multiple subsets of lasers from the same bank into their respective (separate) beams of light that at least partially do not have identical optical paths (in the light generating system). The subsets may comprise one or more of the laser diodes of the laser bank. However, especially a single laser diode may only be comprised by a single subset. Notwithstanding such embodiments, of course also multiple laser banks may be used to provide multiple light generating devices. 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, (at least part of) the first device light may have a first centroid wavelength (λc1) selected from the wavelength range of 400-500 nm, such as from the range of 400-490 nm, like from the range of 430-490 nm. More especially, in embodiments, (at least part of) the first device light may have a first centroid wavelength (λc1) selected from the wavelength range of 440-490 nm, such as from the wavelength range of 450-480 nm. Hence, in 2024PF80055 9 embodiments, the first device light may be blue light. The terms “blue light” or “blue emission”, and similar terms, may especially relate to light having a wavelength in the range of about 440-490 nm (including some violet and cyan hues). However, intensity at shorterwavelengths may also be possible, such as within the wavelength range of 400-440 nm.Especially, in embodiments the device light has a centroid wavelength selected from the bluewavelength range. Yet further, in embodiments, in the first operational mode of the light generating system the first light generating device may be operated at a constant drive current. The operational mode may, in embodiments, be selected from a setting corresponding with a maximum efficiency, a maximum output, a minimum lifetime (i.e., a maximum derating for a define duration of operation under certain operating conditions), a maximum rated setting, or a setting corresponding with a trade-off between output power,efficiency, and lifetime. In other words, a constant drive current may be supplied to the firstlight generating device in the first operational mode of the light generating system. In embodiments, the first light generating device may especially be operated at its respective rated forward current. Alternatively, in embodiments, the first light generating device may especially be operated at its respective rated maximum forward current. In specificembodiments, in the first operational mode the first light generating device may be operatedat its respective rated forward current, rated maximum forward current, or currents in between these former two. Yet, in embodiments, pulsed operation of the first light generating device may be applied. Hence, in such embodiments, the first light generating device may be operated at its rated peak forward current or its maximum peak forward current, or currents in between these former two. Similarly, 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 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). 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 (see also above). In such embodiments, the second laser bank may comprise a second array comprising a plurality of second solid 2024PF80055 10 state light sources. Especially, in embodiments, the second laser bank may comprise a second array comprising a plurality of second lasers. For example, in embodiments, the second arraymay comprise an n*m array, as described above in relation to the first laser bank.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, (at least part of) the second device light may have a centroid wavelength (λc2) selected from the wavelength range of 400-500 nm, such as from the range of 400-490 nm, like from the range of 430-490 nm. More especially, in embodiments, (at least part of) the second device light may have a second centroid wavelength (λc2) selected from the wavelength range of 440-490 nm, such as from the wavelength range of 450-480 nm. Hence, in embodiments, the second device light may be blue light. In embodiments, the first device light and the second device light may both comprise essentially the same type of blue light. Especially, in embodiments, |λc1-λc2| ≤ 10 nm, such as |λc1-λc2| ≤ 5 nm, like |λc1-λc2| ≤ 2 nm, including λc1= λc2. Alternatively, in embodiments, the first device light and the second device light may have a slightly different centroid wavelength. Especially, in embodiments, 5 nm ≤ |λc1-λc2| ≤ 50 nm, such as 10 nm ≤ |λc1-λc2| ≤ 40 nm, like 15 nm ≤ |λc1-λc2| ≤ 30 nm. Systems comprising two blue laser banks with an adjustable fractional distribution over the luminescent material channel and the diffused (blue) channel may provide maximum utilization of essentially all of the blue laser diodes installed in the system, and in addition may enable suitable calibration of one and the same system for diverse applications such as entertainment beams, spots, and wash applications. In embodiments, the first centroid wavelength (λc1) and the second centroid wavelength (λc2) may be essentially the same, i.e., λc1=λc2. Alternatively, in embodiments, the first centroid wavelength (λc1) and the second centroid wavelength (λc2) may be (slightly) different, i.e., |λc1-λc2|≤20 nm, such as |λc1-λc2|≤10 nm. Such embodiments may provide improved color rendering and / or improved system efficiency. Yet further, in embodiments, in the first operational mode of the light generating system the second light generating device may be operated at a constant drive current. In other words, a constant drive current may be supplied to the second light generating device in the first operational mode of the light generating system. In embodiments, the second light generating device may especially be operated at its respective rated forward current. Alternatively, in embodiments, the second light generating device may especially be operated at its respective rated maximum forward current. In specific 2024PF80055 11 embodiments, in the first operational mode the second light generating device may be operated at its respective rated forward current, rated maximum forward current, or currents in between these former two. Yet, in embodiments, pulsed operation of the second light generating device may be applied. Hence, in such embodiments, the second light generating device may be operated at its rated peak forward current or its maximum peak forward current or currents in between these former two. Yet similarly, 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). The third light generating device may herein also comprise a plurality of third (solid state) light sources. Especially, in specific embodiments, the third light generating device may comprise a third laser bank (see also above). In such embodiments, the third laser bank may comprise a third array comprising a plurality of third solid state light sources. Especially, in embodiments, the third laser bank may comprise a third array comprising a plurality of third lasers. For example, in embodiments, the third array may comprise an n*m array, as described above in relation to the first laser bank. 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, (at least part of) the third device light may have a centroid wavelength (λc3) selected from the wavelength range of 570-780 nm, such as from the range of 590-780 nm, like from the range of 600-750 nm. More especially, in embodiments, (at least part of) the third device light may have a second centroid wavelength (λc3) selected from the wavelength range of 610-700 nm, such as from the wavelength range of 620-660 nm. Hence, in embodiments, the third device light may be red light. The terms “red light” or “red emission” especially relate to light having a wavelength in the range of about 620-780 nm. Thanks to the addition of a red laser light channel, the luminescent material may be chosen to have a luminescence color point that may result in a suitable “phosphor load line” connecting the color points of the (blue) device light and the luminescent light in the output (white or colored) system light to achieve improved color rendering and / or improved luminescent conversion (e.g. minimization of droop) and / or improved gamut area (e.g. using lower 2024PF80055 12 wavelength luminescent green emission). As a consequence, a largely improved range of CCT values may be achieved, and even a large range of color points on the black body locus (BBL) may be realized. Yet further, in embodiments, in the first operational mode of the light generating system the third light generating device may be operated at an adjustable drive current. Therefore, in embodiments, the light generating system may comprise a control system (see also further below) configured to control the adjustable drive current supplied to the third light generating device. Such embodiments may be beneficial as the (first and / or second) light generating devices may be operated at a constant power (or drive current) while the system may be set to any of a range of CCTs in a predetermined range of color points without adjusting the third light generating device, where the third light generating device may be operated at an adjustable drive current. Note that, in embodiments, the light generating system may comprise further light generating devices (e.g. a fourth, fifth, etc..). In such embodiments, the optical power of the further light generating devices may be combined with the optical power of the above described (first, second, and / or third) light generating devices through one or more of polarization-based multiplexing (in embodiments where there is no requirement for downstream mixing of the device light with the first, second and third device light), dichroic- based multiplexing, and geometric-based multiplexing. In embodiments, the first light generating device may be configured to provide first device light to the optics. The optics may, in embodiments, be configured to (re-)direct at least part of the first device light received by the optics in an optical path to the luminescent material. The phrase “... light received by ...”, and similar phrases, such as “device light received by the first redirection optical element” 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, and transmission. Further, the action may also include refraction. Whether or not such item receives light may e.g. depend on e.g. a controlling mode (for instance whether or not a light generating device provides light). Similarly, in embodiments, the second light generating device may be configured to provide second device light to the optics. The optics may, in embodiments, be configured to (re-)direct at least part of the second device light received by the optics in an optical path to the luminescent material. Phrases like “a and / or b received by c” or “a and / or b reaching c”, and similar phrases may thus refer to “a received by c and / or b received by c” or “a reaching c and / or b reaching c”. 2024PF80055 13 Hence, in embodiments, the first light generating device, the second light generating device, and the third light generating device may especially be configured to provide first device light, second device light, and third device light, respectively, to the optics. In embodiments, the optics may comprise redirection optical elements. Herein, a redirection optical element may especially refer to an optical element configured to receive and redirect one or more beams of light. In particular, in embodiments, the optics (especially the redirection optical elements) may comprise a first redirection optical element and one or more further redirection optical elements. Note that, in embodiments, a beam combiner may also have a beam splitting functionality (see also further below). Hence, herein instead of the term “redirection optical element” also the term “beam splitter” or “beam combiner” may be applied. The first redirection optical element may especially (in an operational mode of the light generating system) be configured downstream of both the first light generating device and the second light generating device. The terms “upstream” and “downstream” relate to an arrangement of items or 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”. Hence, in embodiments, the first light generating device and the second light generating device may especially be configured to provide first device light and second device light, respectively, tothe first redirection optical element. In such embodiments, the first redirection opticalelement may thus (during operation) be configured in a light-receiving relationship with both the first light generating device and the second light generating device. In embodiments, the first redirection optical element may comprise a polarization-based redirection optical element, i.e., may comprise a polarizing beam splitter (PBS1). In embodiments via polarization multiplexing, device light from different light generating devices (such as the first and second light generating devices) may be combined provided that they differ in (linear) polarization. For instance, s-polarized light and p- polarized light may be combined, or elliptically polarized light comprising relatively more p- polarization than s-polarization, and elliptically polarized light comprising relatively more s- polarization than p-polarization may be (at least partially) combined with a polarization- 2024PF80055 14 based redirection optical element (which may also be indicated as polarizing beam combiner or polarizing beam splitter). A polarizing beam splitter may be considered an example of a redirection optical element. Light propagating to the polarizing beam splitter, and comprising both linear polarizations, like elliptically polarized light, may be split in two orthogonally propagating beams of light with complementary linear polarizations. Hence, this provides the polarizing beam splitter its beam splitting function. However, the opposite may also be true, two beams of light with complementary linear polarizations orthogonally propagating to the polarizing beam splitter may be combined in a single beam comprising both complementary linear polarizations and propagating along an axis parallel to an axis of one of the two beams of light with complementary linear polarizations orthogonally propagating to the polarizing beam splitter. Hence, for the polarizing beam splitter may apply that for a first polarization, the transmission may be higher, like at least 10% points higher, such as at least 20% points higher, or even at least 30 % points, than for a second polarization. Similarly, for a first polarization, the reflection may be lower, like at least 10% points lower, such as at least 20% points lower, or even at least 30 % points, than for a second polarization. Especially, inembodiments, the polarizing beam splitter may be configured to direct at least 60%, like atleast 80%, more especially at least 90%, such as at least about 95%, of the light of the first polarization to a first direction and at least 60%, like at least 80%, more especially at least 90%, such as at least about 95%, of the light of the second polarization to a second direction, wherein the directions may in embodiments have a mutual angle selected from the range 45- 135°, such as about 90°. The percentage of the light may refer to a spectral power (e.g. in Watt). Especially, the first polarization and the second polarization may comprise linear polarizations such as selected from s polarization and p polarization. Optionally, the first polarization and the second polarization may be selected from different elliptically polarized light. In embodiments, the polarizing beam splitters herein may be selected from reflective polarizing beam splitters (reflective polarizers). Therefore, in embodiments, the first device light reaching the first redirection optical element may comprise a first linear polarization. Conversely, in embodiments, the second device light reaching the first redirection optical element may comprise (at least) a second linear polarization, different from the first linear polarization. The device light may, in embodiments, comprise a certain polarization as an intrinsic characteristic to the light generating device. In other embodiments, the device light may comprise a certain 2024PF80055 15 polarization as a result of polarizing optical elements (such as the polarization control system, see also further below) imposing that polarization onto the device light. For example, in embodiments, the first device light (reaching the first redirection optical element) may comprise the first linear polarization (e.g. p-polarization) and the second device light (reaching the first redirection optical element) may comprise the second linear polarization (e.g. s-polarization). In some embodiments, the (first and / or second) device light (reaching the first redirection optical element) may comprise both the first linear polarization and the second linear polarization, i.e., the device light may comprise a first part and a second part comprising the first linear polarization and the second linear polarization respectively. Especially, in embodiments, (at least) the second device light (reaching the first redirection optical element) may comprise a first part of the second device light comprising the first linear polarization (e.g. p-polarization) and a second part of the second device light comprising the second linear polarization (e.g. s-polarization). In embodiments, the first redirection optical element may be configured to (re- )direct device light received by the first redirection optical element. The first redirection optical element may especially do so in dependence of the polarization of the device light received by the first redirection optical element. Especially, in embodiments, the first redirection optical element may be configured to (re-)direct first device light (comprising the first linear polarization) received by the first redirection optical element into a first optical path to one or more of the one or more further redirection optical elements. Additionally, in embodiments, the first redirection optical element may be configured to (re-)direct the first part of the second device light (that first part comprising the second linear polarization) received by the first redirection optical element into the first optical path to one or more of the one or more further redirection optical elements. Hence, in embodiments, the first redirection optical element may be configured to combine first device light and the first part of second device light received by the first redirection optical element into the first optical path to one or more of the one or more further redirection optical elements. Furthermore, in embodiments, the first redirection optical element may be configured to (re-)direct the second part of the second device light (that second part comprising the first linear polarization) received by the first redirection optical element into a second optical path to the first diffuser assembly. Hence, in embodiments, the first optical path and the second optical path may be essentially different optical paths. Furthermore, in embodiments, the first redirection optical element may comprise a partially polarizing beam splitter. Especially, in embodiments, the first redirection 2024PF80055 16 optical element may be configured (i) to essentially fully reflect light having the first linear polarization, (ii) to reflect at least part of light having the second linear polarization, and (iii) to transmit at least another part of light having the second linear polarization. Conversely, in embodiments, the first redirection optical element may be configured (i) to essentially fully transmit light having the second linear polarization, (ii) to reflect at least part of light having the first linear polarization, and (iii) to transmit at least another part of light having the first linear polarization. Hence, in such embodiments, the first redirection optical element may further be configured to (re-)direct part of the first device light (that part comprising the first linear polarization) received by the first redirection optical element into the second optical path to the first diffuser assembly. Hence, in embodiments where the first redirection optical element comprises a partially polarizing beam splitter, the first redirection optical element may be configured to direct (i) part of both the first device light and the second device light into the first optical path, and (ii) another part of both the first device light and the second device light into the second optical path. In embodiments, the first optical path may also be referred to as “a yellow color channel”, whereas the second optical path may also be referred to as “a blue color channel”. Additionally, in embodiments, a third optical path (of the third device light, see also further below) may herein be referred to as “a red color channel”. Hence, the first redirection optical element may be configured to divide device light received by the first redirection optical element over a (blue pumped reflective or transmissive luminescent conversion) yellow color channel and a (reflectively or transmissively diffused) blue color channel, whereas the third light generating device may provide a (reflectively or transmissively diffused) red color channel (see also further below). As described above, in embodiments, the first redirection optical element may be configured to direct (first and / or second) device light in an optical path to one or more of the one or more further redirection optical elements. In embodiments, at least one of the one or more further redirection optical elements may thus be configured in a light-receiving relationship with the first redirection optical element. In embodiments, (the optics comprising) the one or more further redirection optical elements may be configured to direct first device light and the first part of the second device light in an optical path to the luminescent material. Therefore, in embodiments, the one or more further redirection optical elements may for example comprise a dichroic beam splitter. Especially, in embodiments, the one or more further redirection optical elements may comprise a second redirection optical element. In embodiments, the second 2024PF80055 17 redirection optical element may comprise a dichroic beam combiner. In embodiments via dichroic multiplexing, device light from different light generating devices may be combinedprovided that they differ in spectral power distribution. For instance, device light (from atleast two, though optionally more different sources) having different centroid wavelengths may be combined, or device light (from at least two, though optionally more different sources) having (substantially) different spectral power distributions may be combined with a dichroic-based redirection optical element (which may also be indicated as dichroic beam combiner or dichroic beam splitter). In embodiments, the dichroic-based redirection optical element may essentially comprise a spectral filter, such as e.g. a high-pass spectral filter, a low-pass spectral filter, or a combination thereof (also referred to as a band-pass or band- block filter). Further, in embodiments, the dichroic-based redirection optical element may comprise a combination of two or more of a high-pass, a low-pass, a band pass, and a band block filter. In embodiments, the second redirection optical element may thus comprise a dichroic beam combiner (DBC1). The dichroic beam combiner (DBC1) may, in embodiments, comprise at least one cut-off wavelength, i.e., the dichroic beam combiner (DBC1) may be configured to transmit light having one of a wavelength above or below the cut-off wavelength and to reflect light having the other one of a wavelength above or below the cut-off wavelength. Note that therein, the term “dichroic beam combiner” may refer to a dichroic (or spectral) filter as described above, i.e., having one or more cut-off wavelengths. However, herein the term “dichroic beam combiner” may also refer to a combination of an optical component, such as e.g. a polarizing beam splitter, with further spectral requirements. For example, in embodiments, the second redirection optical element may comprise (i) a polarizing beam splitter having PBS-functionality for blue (or red) light combined with (ii) transmissive properties for yellow-green and red (or blue) light (referred to as dichroic beam combiner (DBC1)). Note that, in such embodiments, the spectral requirements imposed by the dichroic beam combiner (DBC1) may apply to (only) one of the (linear) polarizations, but not for its complementary (e.g. orthogonal linear) polarization. Herein, such a component comprising a combination of an optical component, such as e.g. a polarizing beam splitter, with further spectral requirements may be described as a combined polarizing beam splitter and dichroic beam combiner (DBC1). Nonetheless, in specific embodiments, the dichroic beam combiner (DBC1) may comprise a first cut-off wavelength (λco1). Additionally or alternatively, in embodiments, the dichroic beam combiner (DBC1) may comprise a second cut-off wavelength (λco2). Yet 2024PF80055 18 additionally, in embodiments, the dichroic beam combiner (DBC1) may (even) comprise a third cut-off wavelength (λco3). The first cut-off wavelength (λco1) may especially be selectedfrom the range of λc2 + 5 nm < λco1 < λlmc - 10 nm. For example, in embodiments, the firstcut-off wavelength (λco1) may be selected from the range of 435-590 nm, such as from the range of 445-570 nm, like from the range of 455-550 nm. Further, in embodiments, the first cut-off wavelength (λco1) may be selected from the range of 440-480 nm, like from the range of 445-475 nm. In embodiments, the dichroic beam combiner (DBC1) may comprise a low- pass filter, i.e., light having a wavelength below the first cut-off wavelength (λco1) may be transmitted, whereas light having a wavelength above the first cut-off wavelength (λco1) may be reflected by the dichroic beam combiner (DBC1). Hence, in embodiments, the dichroic beam combiner (DBC1) may be configured to transmit light having a wavelength below the first cut-off wavelength (λco1) and reflect light having a wavelength above the first cut-offwavelength (λco1), wherein λc2 + 5 nm < λco1 < λlmc - 10 nm. For example, in embodiments,the dichroic beam combiner (DBC1) may be configured to (i) transmit first and / or second (diffused) device light (received by the dichroic beam combiner) and (ii) reflect luminescent material light and (optionally)third (diffused) device light (received by the dichroic beam combiner). Alternatively, in embodiments, the dichroic beam combiner (DBC1) may comprise a high-pass filter, i.e., light having a wavelength above the first cut-off wavelength (λco1) may be transmitted, whereas light having a wavelength below the first cut-off wavelength (λco1) may be reflected by the dichroic beam combiner (DBC1). Hence, in embodiments, the dichroic beam combiner (DBC1) may be configured to reflect light having a wavelength below the first cut-off wavelength (λco1) and transmit light having a wavelengthabove the first cut-off wavelength (λco1), wherein λc2 + 5 nm < λco1 < λlmc - 10 nm. Forexample, in embodiments, the dichroic beam combiner (DBC1) may be configured to (i) reflect first and / or second (diffused) device light (received by the dichroic beam combiner) and (ii) transmit luminescent material light and (optionally) third (diffused) device light (received by the dichroic beam combiner). The second cut-off wavelength (λco2) may especially be selected from therange of λlmc + - 5 nm. For example, in embodiments, the second cut-offwavelength (λco2) may be selected from the range of 510-775 nm, such as from the range of 550-715 nm, like from the range of 610-695 nm. Further, in embodiments, the second cut-off wavelength (λco2) may be selected from the range of 600-680 nm, like from the range of 620- 635 nm. In embodiments, the dichroic beam combiner (DBC1) may comprise a low-pass 2024PF80055 19 filter, i.e., light having a wavelength below the second cut-off wavelength (λco2) may be transmitted, whereas light having a wavelength above the second cut-off wavelength (λco2) may be reflected by the dichroic beam combiner (DBC1). Hence, in embodiments, the dichroic beam combiner (DBC1) may be configured to transmit light having a wavelength below a second cut-off wavelength (λco2) and reflect light having a wavelength above thesecond cut-off wavelength (λco2), wherein λlmc + 10 nm < λco2 < λc3 - 5 nm. For example, inembodiments, the dichroic beam combiner (DBC1) may be configured to (i) transmit first and / or second (diffused) device light and (a substantial part of the) luminescent material light (received by the dichroic beam combiner), and (ii) reflect third (diffused) device light (received by the dichroic beam combiner). Alternatively, in embodiments, the dichroic beam combiner (DBC1) may comprise a high-pass filter, i.e., light having a wavelength above the second cut-off wavelength (λco2) may be transmitted, whereas light having a wavelength below the second cut-off wavelength (λco2) may be reflected by the dichroic beam combiner (DBC1). Hence, in embodiments, the dichroic beam combiner (DBC1) may be configured to reflect light having a wavelength below the second cut-off wavelength (λco2) and transmit light having awavelength above the second cut-off wavelength (λco2), wherein λlmc + 10 nm < λco2 < λc3 - 5nm. For example, in embodiments, the dichroic beam combiner (DBC1) may be configured to (i) reflect first and / or second (diffused) device light and (a substantial part of the) luminescent material light (received by the dichroic beam combiner) and (ii) transmit third (diffused) device light (received by the dichroic beam combiner). Yet alternatively, in embodiments, the dichroic beam combiner (DBC1) may comprise both the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2). In such embodiments, the second cut-off wavelength (λco2) may be higher than the first cut-off wavelength (λco1), i.e., λco2>λco1. Especially, in such embodiments, the dichroic beam combiner (DBC1) may be configured to transmit light having a wavelength below a first cut- off wavelength (λco1) and above a second cut-off wavelength (λco2) and reflect light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength(λco2), wherein λc2 + 5 nm < λco1 < λlmc - 10 nm and λlmc + 10 nm < λco2 < λc3 - 5 nm. Forexample, in embodiments, the dichroic beam combiner (DBC1) may be configured to (i) transmit first and / or second (diffused) device light and third (diffused) device light (received by the dichroic beam combiner) and (ii) reflect luminescent material light (received by the dichroic beam combiner). Hence, in embodiments, the dichroic beam combiner (DBC1) may comprise a combination of filters which may also be referred to as a band-block filter. 2024PF80055 20 Conversely, in embodiments, the dichroic beam combiner (DBC1) may be configured to reflect light having a wavelength below a first cut-off wavelength (λco1) and above a second cut-off wavelength (λco2) and transmit light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2), wherein λc2 + 5 nm <λco1 < λlmc - 10 nm and λlmc + 10 nm < λco2 < λc3 - 5 nm. For example, in embodiments, thedichroic beam combiner (DBC1) may be configured to (i) reflect first and / or second (diffused) device light and third (diffused) device light (received by the dichroic beam combiner) and (ii) transmit luminescent material light (received by the dichroic beam combiner). Hence, in embodiments, the dichroic beam combiner (DBC1) may comprise a combination of filters which may also be referred to as a band-pass filter. Such embodiments may be beneficial as it may reduce luminescent material light output loss in case of spectral overlap of the third device light with the luminescent material light. The third cut-off wavelength (λco3) may especially be selected from the range of λco3 > λc3 + 5 nm. For example, in embodiments, the third cut-off wavelength (λco3) may be selected from the range of 595-775 nm, such as from the range of 600-750 nm, like from the range of 610-720 nm. Further, in embodiments, the third cut-off wavelength (λco3) may be selected from the range of 615-735 nm, like from the range of 635-700 nm. In embodiments, the dichroic beam combiner (DBC1) may be configured to transmit light having a wavelength below a second cut-off wavelength (λco2) and above a third cut-off wavelength (λco3) and reflect light having a wavelength between the second cut-off wavelength (λco2) andthe third cut-off wavelength (λco3), wherein λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5nm. Hence, in embodiments, the dichroic beam combiner (DBC1) may comprise a combination of filters which may also be referred to as a band-block filter. For example, in embodiments, the dichroic beam combiner (DBC1) may be configured to (i) transmit first and / or second (diffused) device light and (a substantial part of the) luminescent material light (received by the dichroic beam combiner) and (ii) reflect third (diffused) device light (received by the dichroic beam combiner). Yet alternatively, in embodiments, the dichroic beam combiner (DBC1) may be configured to reflect light having a wavelength below the second cut-off wavelength (λco2) and above the third cut-off wavelength (λco3) and transmit light having a wavelength between the second cut-off wavelength (λco2) and the third cut-off wavelength (λco3). For example, in embodiments, the dichroic beam combiner (DBC1) may be configured to (i) reflect first and / or second (diffused) device light and (a substantial part of the) luminescent material light (received by the dichroic beam combiner) and (ii) transmit third (diffused) device light 2024PF80055 21 (received by the dichroic beam combiner). Hence, in embodiments, the dichroic beam combiner (DBC1) may be configured to reflect light having a wavelength below a second cut-off wavelength (λco2) and above a third cut-off wavelength (λco3) and transmit light having a wavelength between the second cut-off wavelength (λco2) and the third cut-offwavelength (λco3), wherein λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm.Furthermore, in some embodiments, the dichroic beam combiner (DBC1) may comprise the first cut-off wavelength (λco1), the second cut-off wavelength (λco2), and the third cut-off wavelength (λco3). In such embodiments, the dichroic beam combiner (DBC1) may be configured to transmit light having a wavelength below a first cut-off wavelength (λco1) and between a second cut-off wavelength (λco2) and a third cut-off wavelength (λco3) and reflect light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2) and above the third cut-off wavelength (λco3), wherein λc2 +5 nm < λco1 < λlmc - 10 nm, λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm. Forexample, in embodiments, the dichroic beam combiner (DBC1) may be configured to (i) transmit first and / or second (diffused) device light and third (diffused) device light (received by the dichroic beam combiner) and (ii) reflect (a substantial part of the) luminescent material light (received by the dichroic beam combiner). Conversely, in embodiments, the dichroic beam combiner (DBC1) may be configured to reflect light having a wavelength below a first cut-off wavelength (λco1) and between a second cut-off wavelength (λco2) a third cut-off wavelength and transmit light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2) and above the third cut-off wavelength (λco3), wherein λc2+ 5 nm < λco1<λlmc - 10 nm, λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm. For example, inembodiments, the dichroic beam combiner (DBC1) may be configured to (i) reflect first and / or second (diffused) device light and third (diffused) device light (received by the dichroic beam combiner) and (ii) transmit (a substantial part of the) luminescent material light (received by the dichroic beam combiner). Hence, as described above, the optics may especially be configured to, in embodiments, direct in a first operational mode of the light generating system a part of the device light (comprising one or more of first device light and the first part of the second device light) in an optical path to the luminescent material. The device light (comprising one or more of first device light and the first part of the second device light) may, in such embodiments, especially be directed in an optical path to the luminescent material via the first redirection optical element and the at least one of the one or more further redirection 2024PF80055 22 optical elements, e.g. the second redirection optical element or a (second) dichroic beam splitter. Hence, in embodiments, the total amount of device light provided to (or injected into) the luminescent material channel may be larger than the total amount of device light from the first light generating device or from the second light generating device. In embodiments, the luminescent material may thus be configured in a light- receiving relationship with one of the one or more further redirection optical elements (especially the second redirection optical element). In embodiments, the luminescent materialmay be configured to convert at least part of the device light received by the luminescentmaterial into luminescent material light. Especially, in embodiments, the luminescent material may be configured to convert at least 60%, such as at least 70%, especially at least 80%, more especially at least 90% of the device light (especially first device light and the first part of the second device light) received by the luminescent material into luminescent material light. Further, in embodiments, the luminescent material may be configured to convert at most 100%, such as at most 98%, especially at most 95%, more especially at most 90% of the device light (especially first device light and the first part of the second devicelight) received by the luminescent material into luminescent material light. Note that theherein indicated percentages for luminescent conversion may refer to a quantum efficiency, i.e., a conversion efficiency from incident photons to luminescent photons. Alternatively, the efficiency of the luminescent material may be indicated with its energy conversion efficiency. Due to heat dissipation (i.e. thermal losses) caused by Stokes losses the energy conversion efficiency of the luminescent material may be configured to convert at most 90% (energy conversion efficiency), such as at most 88%, especially at most 85% of the device light (especially first device light and the first part of the second device light) received by the luminescent material into 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 spectralpower 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 2024PF80055 23 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). The term “luminescent material” may also refer to a plurality of different luminescent materials. Examples of possible luminescent materials are indicated below. 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. 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. 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) 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%. 2024PF80055 24 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%. 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 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 may comprise 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 A3B5O12garnets, 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. 2024PF80055 25 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. 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 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 2024PF80055 26 material light. Different luminescent materials may have different spectral power distributions of the respective luminescent material light. Alternatively or additionally, suchdifferent luminescent materials may especially have different color points (or dominantwavelengths). In embodiments, the luminescent material may alternatively or additionally comprise one or more of MS:Eu2+and / or M2Si5N8:Eu2+and / or MAlSiN3:Eu2+and / or Ca2AlSi3O2N5:Eu2+, etc., wherein M comprises one or more of Ba, Sr and Ca, especially in embodiments at least Sr. Hence, in embodiments, the luminescent material may comprise one or more materials selected from the group consisting of (Ba,Sr,Ca)S:Eu, (Ba,Sr,Ca)AlSiN3:Eu and (Ba,Sr,Ca)2Si5N8:Eu. In these compounds, europium (Eu) is substantially or only divalent, and replaces one or more of the indicated divalent cations. In general, Eu will not be present in amounts larger than 10% of the cation; its presence will especially be in the range of about 0.5 to 10%, more especially in the range of about 0.5 to 5% relative to the cation(s) it replaces. The term “:Eu”, indicates that part of the metal ions is replaced by Eu (in these examples by Eu2+). For instance, assuming 2% Eu in CaAlSiN3:Eu, the correct formula could be (Ca0.98Eu0.02)AlSiN3. Divalent europium will in general replace divalent cations, such as the above divalent alkaline earth cations, especially Ca, Sr or Ba. In embodiments, the luminescent material may comprise a luminescent material of the type M’xM2-2xAX6 doped with tetravalent manganese, wherein M’ comprises an alkaline earth cation, M comprises an alkaline cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, for instance comprising one or more of silicon and titanium, wherein X comprises a monovalent anion, at least comprising fluorine. A luminescent material of the type M’xM2-2xAX6 doped with tetravalent manganese is amongst others described in WO2013121355A1, which is herein incorporated by reference. Passages from WO2013121355A1 are also copied herein. Herein, M’xM2-2xAX6doped with tetravalent manganese, may further also shortly be indicated as “phosphor”, i.e. the phrase " phosphor comprising M’xM2-2xAX6 doped with tetravalent manganese" may in an embodiment also be read as M’xM2-2xAX6doped with tetravalent manganese phosphor, or (tetravalent) Mn-doped M’xM2-2xAX6phosphor, or shortly "phosphor". Relevant alkaline cations (M) are sodium (Na), potassium (K) and rubidium (Rb). Optionally, also lithium and / or cesium may be applied. In a preferred embodiment, M comprises at least potassium. In yet another embodiment, M comprises at least rubidium. The phrase “wherein M comprises at least potassium” indicates for instance that of all M cations in a mole M’xM2-2xAX6 , a fraction comprises K+and an optionally remaining fraction 2024PF80055 27 comprises one or more other monovalent (alkaline) cations (see also below). In another preferred embodiment, M comprises at least potassium and rubidium. Optionally, the M’xM2-2xAX6 luminescent material has the hexagonal phase. In yet another embodiment, the M’xM2- 2xAX6 luminescent material has the cubic phase. Relevant alkaline earth cations (M’) are magnesium (Mg), strontium (Sr), calcium (Ca) and barium (Ba), especially one or more of Sr and Ba. In an embodiment, a combination of different alkaline cations may be applied. In yet another embodiment, a combination of different alkaline earth cations may be applied. In yet another embodiment, a combination of one or more alkaline cations and one or more alkaline earth cations may be applied. For instance, KRb0.5Sr0.25AX6might be applied. As indicated above, x may be in the range of 0-1, especially x<1. In an embodiment, x=0. The term “tetravalent manganese” refers to Mn4+. This is a well-known luminescent ion. In the formula as indicated above, part of the tetravalent cation A (such as Si) is being replaced by manganese. Hence, M’xM2-2xAX6 doped with tetravalent manganese may also be indicated as M’xM2-2xA1-mMnmX6. The mole percentage of manganese, i.e. the percentage it replaces the tetravalent cation A will in general be in the range of 0.1-15 %, especially 1-12 %, i.e. m is in the range of 0.001-0.15, especially in the range of 0.01-0.12. In an embodiment, M’xM2-2xAX6 comprises K2SiF6 (indicated herein also as KSiF system). As indicated above, in another preferred embodiment, M’xM2-2xAX6comprises KRbSiF6 (herein also indicated as K,Rb system). As indicated above, part of silicon is replaced by manganese (i.e. the formula may also be described as K2Si1-mMnmF6 or KRbSi1-mMnmF6, with m as indicated above, or as KRbSiF6:Mn and K2SiF6:Mn, respectively). As manganese replaces part of a host lattice ion and has a specific function, it is also indicated as “dopant” or “activator”. Hence, the hexafluorosilicate is doped or activated with manganese (Mn4+). In specific embodiments, the luminescent material may comprise (K,Rb)2SiF6:Mn4+. Alternatively or additionally, in embodiments the third luminescent material may comprise K2SiF6:Mn4+. Alternatively or additionally, in embodiments the third luminescent material may comprise K2TiF6:Mn4+. In embodiments, the third luminescent material may comprise K2(Si,Ti)F6:Mn4+. As can be derived from the above, “Si,Ti” may indicate one or more of Si and Ti. Especially, the luminescent material may be an inorganic luminescent material, such as one or more of the above-described trivalent cerium or divalent europium comprising oxides, oxynitrides, or nitrides. Eu in the above indicated luminescent materials is substantially or only in the divalent state, as is known to the person skilled in the art. 2024PF80055 28 The term “luminescent material” herein especially relates to inorganic luminescent materials. 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.. Quantum dots are small crystals of semiconducting material generally having a width or diameter of only a few nanometers. When excited by incident light, a quantum dot emits light of a color determined by the size and material of the crystal. Light of a particular color can therefore be produced by adapting the size of the dots. Most known quantum dots with emission in the visible range are based on cadmium selenide (CdSe) with a shell such as cadmium sulfide (CdS) and zinc sulfide (ZnS). Cadmium free quantum dots such as indium phosphide (InP), and copper indium sulfide (CuInS2) and / or silver indium sulfide (AgInS2) can also be used. 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. The luminescent material may thus, in embodiments, be configured to convert device light received by the luminescent material into luminescent material light. In specific embodiments, the luminescent material light may have a luminescent material centroid wavelength (λlmc). Especially, in embodiments, the luminescent material centroid wavelength (λlmc) may be selected from the range of 490-620 nm, such as from the range of 500-600 nm, like from the range of 520-590 nm, especially from the range of 535-580 nm. Further, in embodiments, the luminescent material centroid wavelength (λlmc) may be selected from the range of 500-570 nm, such as from the range of 520-550 nm, like from the range of 525-540 nm. Especially, in embodiments, the luminescent material centroid wavelength (λlmc) may be selected from the range of 537-560 nm. Such embodiments may be beneficial as the luminescent spectral content at wavelengths > 640 nm may be minimal, enabling the application of relative simple dichroic filters to obtain high utilization efficiency of the luminescent light in the output system light. Furthermore, in embodiments, the luminescent material light and the third device light may have a different centroid wavelength (e.g. the third centroid wavelength (λc3) may be larger than the luminescent material centroid wavelength (λlmc)). Especially, |λc3-λlmc| ≥ 5 nm, such as |λc3-λlmc| ≥ 10 nm, like especially |λc3-λlmc| ≥ 20 nm. Such embodiments may be beneficial as the different centroid wavelengths may facilitate easier dichroic requirements of optical elements applied for dichroic 2024PF80055 29 multiplexing (i.e. dichroic-based redirection optical elements). Additionally or alternatively, in embodiments, the third centroid wavelength (λc3) may be larger than the second centroid wavelength (λc2) and smaller than the luminescent material centroid wavelength (λlmc). Hence, in such embodiments, In embodiments, the luminescent material may be configured in the reflective mode. In general, the luminescent material may give rise to quite a lot of thermal dissipation. In the reflective mode, thermal management may be easier, as a substantial part of the luminescent material may be in thermal contact with a thermally conductive element, like a heatsink or heat spreader. Therefore, in embodiments, this material may preferably be applied onto a rotating wheel, enabling superior thermal spreading and cooling without the need for e.g. active water cooling, and thereby enabling maximum possible irradiance values. As mentioned above, in embodiments, the luminescent material may thus be configured in the reflective mode. In alternative embodiments, the luminescent material 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, which may be useful for generating the desirable spectral power distribution. In such embodiments, the luminescent material may be applied in thermal contact with a thermally conductive element. An element may be considered in “thermal contact” with another element if it can exchange energy through the process of heat. In embodiments, thermal contact can be achieved by physical contact. In embodiments, thermal contact may be achieved via a thermally conductive 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. 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). 2024PF80055 30 Hence, in embodiments the luminescent material may be configured in thermal contact with a thermally conductive material. For instance, the luminescent material may be configured in thermal contact with a thermally conductive element. A thermally conductive element may especially comprise thermally conductive material. 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 comprise one or more of copper, aluminum, silver, gold, silicon carbide, aluminum nitride, boron nitride, aluminum silicon carbide, beryllium oxide, a silicon carbide composite, aluminum silicon carbide, a copper tungsten alloy, a copper molybdenum carbide, carbon, diamond, and graphite. Alternatively, or additionally, the thermally conductive material may comprise or consist of aluminum oxide. In embodiments, the thermally conductive element may comprise one or more of a heatsink, a heat spreader, and a two-phase cooling device. In yet other embodiments, the thermally conductive element may be configured in thermal contact with one or more of a heatsink, a heat spreader, and a two-phase cooling device, and may e.g.transfer heat to such heatsink, heat spreader, or two-phase cooling device, via anotherthermally conductive element. In embodiments, as described above, (at least one of) the one or more further redirection optical elements may thus be configured to direct first device light and the first part of the second device light to the luminescent material. Furthermore, in embodiments, (as e.g. described above) the first redirection optical element may be configured to direct a second part of the second device light, (that second part) comprising a first linear polarization, received by the first redirection optical element into the second optical path to the first diffuser assembly. In some embodiments, the second part of the device light may propagate from the first redirection optical element (directly) to the first diffuser assembly (optionally via optics such as one or more integrators or lenses). In alternative embodiments, the second part of the device light may propagate from the first redirection optical element to the first diffuser assembly via one or more of the one or more further redirection optical elements. Hence, in embodiments, (at least one of) the one or more further redirection optical elements may be configured to direct the second part of the second device light to the first diffuser assembly. 2024PF80055 31 In embodiments, the first diffuser assembly may thus be configured to receive at least the second part of the second device light (via the first redirection optical element and optionally also via the second redirection optical element). Furthermore, in some embodiments, the first diffuser assembly may also be configured to receive at least part of the first device light (via the first redirection optical element and optionally also via the second redirection optical element). In embodiments, the first diffuser assembly may comprise (at least) a first diffuser. The first diffuser may, in embodiments, be configured to diffuse (or scatter) at least part of the (first and) second device light received by the first diffuser. Especially, the first diffuser may be configured to diffuse at least 60%, such as at least 70%, especially at least 80%, more especially at least 90% of the (first and) second device light received by the first diffuser into diffused (first and) second device light. In specific embodiments, the first diffuser may be configured to diffuse (or scatter) at least part of the device light, comprising (one or more of first device light and) the second part of the second device light, received by the first diffuser. Similarly to the luminescent material, in embodiments, the first diffuser assembly may be configured in the transmissive mode or in the reflective mode. Examples and further embodiments of the first diffuser (assembly) will be described in more detail below. Yet further, in embodiments, the third light generating device and the redirection optical elements may be configured to provide third device light into a third optical path to the second diffuser assembly. In some embodiments, the third device light may propagate from the third light generating device substantially directly to the second diffuser assembly (optionally via optics such as one or more integrators or lenses). In alternative embodiments, the third device light may propagate from the third light generating device to the second diffuser assembly via one or more of the one or more further redirection optical elements. Hence, in embodiments, (at least one of) the one or more further redirection optical elements may be configured to direct the third device light to the second diffuser assembly. Especially, in such embodiments, the third light generating device and the optics may be configured such that the third device light received by the second diffuser assembly may comprise linear polarized light. In some embodiments, the third light generating device and the optics may be configured such that the third device light received by the second diffuser assembly may essentially consist of linear polarized light (such as e.g. either p- polarized light or s-polarized light). In alternative embodiments, third light generating device and the optics may be configured such that the third device light received by the second 2024PF80055 32 diffuser assembly may comprise linear polarized light (such as e.g. both p-polarized light and s-polarized light, or any other orientation of the polarization plane). In some embodiments, third light generating device and the optics may be configured such that the third device light received by the second diffuser assembly may (even) be unpolarized (or non-polarized) light. In embodiments, the second diffuser assembly may thus be configured to receive at least part of the third device light (optionally via one or more of the one or more further redirection optical elements). In embodiments, the second diffuser assembly may comprise (at least) a second diffuser. The second diffuser may, in embodiments, be configured to diffuse (or scatter) at least part of the third device light received by the second diffuser. Especially, the second diffuser may be configured to diffuse at least 60%, such as at least 70%, especially at least 80%, more especially at least 90% of the third device light received by the second diffuser into diffused third device light. Similarly to the luminescent material and the first diffuser assembly, in embodiments, the second diffuser assembly may be configured in the transmissive mode or in the reflective mode. Yet further, the second diffuser assembly may be configured in the collinear reflective mode or the non-collinear reflective mode, similarly to the first diffuser assembly. Here below, examples and further embodiments of the (first and second) diffuser (assembly) will be described in more detail. The described embodiments may apply to the first diffuser (assembly), the second diffuser (assembly), or both. As described above, in embodiments, the (first and / or second) diffuser may be configured either in the transmissive mode or in the reflective mode. Hence, in specific embodiments, the diffuser may be configured in the reflective mode (i.e. the diffuser may comprise a reflective diffuser). Therefore, in embodiments, the reflective diffuser may be (diffuse) reflective for (one or more of first, second and third) device light. In embodiments, the reflective diffuser may comprise a surface diffuser, a volume diffuser, or a combination of a surface and volume diffuser. The reflective diffuser may, in embodiments, comprise oneor more materials selected from the group comprising: a glass with high transmission in thespectral range of the (first and second) device light, a silicone-based material, and a transparent ceramic material such as e.g. sapphire. Especially, in embodiments, the reflective diffuser may comprise one (or more) of: a small angle scattering metallic substrate, a white ceramic reflector, a patterned glass-based substrate with a (deposited metallic or (layered) dielectric) reflective coating, a combination of optical micro-structures with specular reflective elements, a combination of a solid optical body with a diffuse reflector, a 2024PF80055 33 combination of a structured surface with a dichroic or thin film deposited reflector, and a combination of a total internal reflector element with additional surface structuring. The reflective diffuser may especially be selected based on preferred system characteristics, such as thermal management, bulkiness, and cost. In specific embodiments, the reflective diffuser may comprise a small angle diffuser. Especially, in some embodiments, the reflective diffuser (comprising the small angle diffuser) may be configured to provide an angular spread of diffusion where as a function ofa scatter angle θ, the intensity I(θ) of the diffused (or scattered) light may correspond to afunction of cosn(θ), wherein n may be selected from the range of 10-100, like from the range of 20-100, such as from the range of 30-90. However, in other embodiments (when the diffuser comprises e.g. a top-hat diffuser), the reflective diffuser (comprising the small angle diffuser) may be configured to provide an angular spread of diffusion corresponding to one or more of a top-hat diffusion, or another engineered diffusion. In other words, in embodiments, the reflective diffuser may (comprise a small angle diffuser that may) be configured to re- distribute incoming device light such that the diffused beam (comprising device light) propagating from the reflective diffuser may have a full width at half maximum (FWHM) selected from the range of 5-60°, such as from the range of 10-50°, like from the range of 10-40°, especially from the range of 12-30°. In the embodiments described here, the FWHMmay especially refer to the diffused beam (comprising device light) and therefore may be the result of both the divergence of the incident beam and the diffusion by the reflective diffuser. In embodiments, the diffuser assembly may comprise the reflective diffuser and one or more optical elements, such as e.g. one or more lenses. In specific embodiments, the diffuser assembly may comprise (at least) a (reflective) diffuser, a condenser optical element, and a collecting optical element. Embodiments wherein the diffuser assembly comprises further (optical) elements are herein not excluded. Especially, in embodiments, the diffuser may comprise a reflective diffuser. Additionally or alternatively, in embodiments, the diffuser may comprise a (partially) transmissive diffuser combined with a reflective optical component configured behind (relative to a plane of incidence of) the transmissive diffuser. In such embodiments, the reflective optical component may e.g. comprise a (specular) mirror coating configured on the diffuser and / or a discrete specular mirror configured externally (and not in optical contact) of the diffuser, see also further below. In embodiments, the condenser optical element may be configured upstream of the reflective diffuser. As such, in embodiments, the condenser optical element may be configured to receive device light (originating from one or more of the light generating 2024PF80055 34 devices) and propagate the device light in an optical path to the diffuser. Therefore, in embodiments, the condenser optical element may be transmissive for (one or more of first, second and third) device light. Especially, in embodiments, the condenser optical element may be configured to condense or focus the device light received by the condenser optical element. The condenser optical element may thus, in embodiments, be configured to provide a focused beam of device light in an optical path to the diffuser. The condenser optical element may, in embodiments, comprise a lens. Especially, in embodiments, the condenser optical element may comprise a surface configured to condense an incoming parallel beam of light, such as a lens surface. In embodiments, the condenser optical element may for example comprise one or a curved lens surface, a Fresnel-type lens surface, and a metasurface (i.e., a flat textured surface). Especially, in embodiments, the condenser optical element may comprise an aspherical lens. However, in alternative embodiments (in dependence on desired requirements for the out-put system light), the condenser optical element may also comprise a spherical lens. In embodiments, the condenser optical element may comprise a lens with an optical diameter selected from the range of 15-60 mm, such as from the range of 20-50 mm, like from the range of 25-40 mm. Such embodiments may provide the benefit that the diameter of the condenser optical element may be large enough to accommodate an incoming beam of device light, while not being too bulky so that it may still fit in the light generating system. Furthermore, in embodiments, the condenser optical element may comprise a material having low absorption for (at least) the spectral range of the device light. Especially, in embodiments, the condenser optical element may comprise a material having an absorption coefficient selected from the range of ≤0.01 cm-1for the spectral range of the received device light. More especially, in embodiments, the condenser optical element may comprise a material having an absorption coefficient selected from the range of ≤0.005 cm-1, such as from the range of ≤0.01 cm-1, for the spectral range of the received device light. The condenser optical element may thus be configured to provide a focused beam of device light in an optical path to the diffuser. Hence, in embodiments, the diffuser may be configured in a light-receiving relationship with the condenser optical element. The diffuser may especially be configured to receive the focused beam of device light (originating from the condenser optical element) and reflect the device light in an optical path to the collecting optical element. Especially, in embodiments, the diffuser may be configured to diffuse and reflect the focused beam of device light received by the diffuser. The diffuser 2024PF80055 35 may thus, in embodiments, be configured to provide a diffused beam of device light in an optical path to the collecting optical element. In embodiments, the focused beam of device light (provided by the condenser optical element) may have an optical axis relative to the diffuser. Especially, in embodiments, relative to the diffuser the incident focused beam of device light may have an (incident) optical axis (Oi). Hence, in embodiments, the (incident) optical axis (Oi) may comprise an optical axis of light incident on the diffuser. Conversely, in embodiments, the diffused device light (provided by the diffuser) may have an optical axis relative to the diffuser. Especially, in embodiments, relative to the diffuser the reflected diffused device light may have an (reflection) optical axis (Or). Hence, in embodiments, the (reflection) optical axis (Or) may comprise an optical axis of light reflected from the diffuser. Herein, the term “optical axis” (O) may be defined as an imaginary line that defines the path along which light propagates towards or from a respective element. For example, the optical axis of the device light incident on the diffuser may be defined as an imaginary line that defines the path along which light propagates (from the first light generating device via the optics) to the diffuser. More especially, the optical axis (O) may coincide with the direction of the light with the highest radiant flux. In embodiments, the (incident) optical axis (Oi) and the (reflection) optical axis (Or) may have a mutual angle (β). Especially, in embodiments, the mutual angle (β) may be selected from the range of 70°≤β≤150°, such as from the range of 80°≤β≤140°, like from the range of 80°≤β≤110°, especially from the range of 85°≤β≤100°. In embodiments, the (incident) optical axis (Oi) of the incident focused beam comprising the device light may correspond to an average angle of incidence of the device light on (a plane of incidence of) the diffuser. Conversely, the (reflection) optical axis (OR) of the reflected diffused beam comprising the device light may correspond to an average angle of reflectance of the device light from (a plane of incidence of) the diffuser. Especially, in embodiments, average angles of incidence and / or reflection may be defined in an incidence plane of the diffuser with relation to the normal of said incidence plane. In specific embodiments, the average angle of incidence (of the device light on the diffuser) and the average angle of reflection (of the device light from the diffuser) may be symmetrical around the normal of the plane of incidence. Hence, in such embodiments, the average angles of incidence and reflection may be derived from the value of the mutual angle (β). Hence, in embodiments, the diffuser may be configured in a non-collinear (or non-coaxial) configuration, i.e., the incoming beam of light and the outgoing beam of light may not be collinear. Especially, in embodiments, the 2024PF80055 36 incoming beam of light and the outgoing beam of light may be orthogonal relative to each other. In other words, the mutual angle (β) may be 90°, i.e., the (incident) focused beam of device light may be essentially perpendicular to the (reflected) beam of diffused device light. However, a mutual angle (β) of exactly 90° may not be necessary. A smaller or larger mutual angle (β) may be provided in view of the desired architecture or design of the system. In embodiments, the mutual angle (β) may be at least 75, such as at least 85. Such embodiments may be beneficial as such a mutual angle (β) allows for the configuration of the condensing optical element and the collecting optical element at (about) their respective focal distances from the diffuser as measured respectively on the incident optical axis (Oi) and the reflection optical axis (Or). In case of a smaller mutual angle (β), the condensing and collecting optical elements may be limited in size due to the available space, which may lead to a loss of light. In case of larger angles, the condensing and collecting optical elements may be less (or even not at all) limited in size. The diffuser may, in embodiments, thus be configured to diffuse (or scatter) (at least the first) device light received by the diffuser. Especially, in such embodiments, the diffuser may comprise a reflective diffuser. Alternatively, in embodiments, the diffuser may comprise a transmissive diffuser combined with a (specular) reflective optical component configured behind (relative to a plane of incidence of) the transmissive diffuser. For example, the transmissive diffuser may comprise optical micro-structures configured to provide (both) transmissive and reflective diffusion of light received by the diffuser. In such embodiments, the reflective optical component may be configured to reflect transmissively diffused light that may otherwise be lost. Therefore, the reflective optical component may e.g. comprise a (specular) mirror coating configured on the diffuser and / or a discrete specular mirror configured externally (and not in optical contact) of the diffuser. Hence, in such embodiments, the diffuser may comprise a combination of optical micro-structures with a specular reflective element(s). Further, the diffuser may, in embodiments, thus be configured to provide a beam of diffused device light in an optical path to the collecting optical element. Hence, in embodiments, the collecting optical element may thus be configured in a light-receiving relationship with the diffuser. In other words, the collecting optical element may be configured downstream of the diffuser. The collecting optical element may especially be configured to receive (or collect) the diffused device light (originating from the diffuser). In embodiments, the collecting optical element may be configured to collimate the received 2024PF80055 37 diffused device light to provide a collimated beam of diffused device light in an optical path to the light exit via the redirection optical elements. In embodiments, the collecting optical element may thus be transmissive for the diffused device light. Especially, in embodiments, the collecting optical element may be configured to collect and collimate the beam of diffused device light received by the collecting optical element. The collecting optical element may thus, in embodiments, be configured to provide a collimated beam of diffused device light in an optical path to the light exit via the redirection optical elements. The collecting optical element may, in embodiments, comprise a lens. Especially, in embodiments, the collecting optical element may comprise an aspherical lens. However, in alternative embodiments (in dependence on desired requirements for the out-put system light), the collecting optical element may also comprise a spherical lens. In embodiments, the collecting optical element may comprise a lens with an optical diameter selected from the range of 15-60 mm, such as from the range of 20-50 mm, like from the range of 25-40 mm. Such embodiments may provide the benefit that the diameter of the collecting optical element may be large enough to accommodate an incoming beam of diffused device light propagating from the diffuser, while not being too bulky so that it may still fit in the light generating system. Furthermore, in embodiments, the collecting optical element may comprise a material having low absorption for (at least) the spectral range of the device light. Especially, in embodiments, the collecting optical element may comprise a material having an absorption coefficient selected from the range of ≤0.01 cm-1for the spectral range of the received device light. More especially, in embodiments, the collecting optical element may comprise a material having an absorption coefficient selected from the range of ≤0.005 cm-1, such as from the range of ≤0.01 cm-1, for the spectral range of the received device light. Note that, in embodiments, the condensing optical element and the collecting optical element may comprise essentially the same type of optical element. However, this may not necessarily be the case. In embodiments, the condensing optical element may comprise a single positive lens. A second single positive lens may further be applied for the collecting (or collimating) optical element configured to collect the diffused device light along a path that is different from that of the incident light. In some embodiments, the condenser optical element and the collecting optical element may have the same focal length. In alternative embodiments, the condenser optical 2024PF80055 38 element and the collecting optical element may have a different focal length. Hence, in embodiments, the condenser optical element may have a condenser focal length. Similarly, in embodiments, the collecting optical element may have a collector focal length. In embodiments, the condenser focal length and the collector focal length may differ by at least 10%, such as by at least 15%, like by at least 20%. Further, in embodiments, the condenser focal length and the collector focal length may differ by at most 150%, like by at most 100%. An advantage thereof may be that a spot size of the focused beam comprising first device light on the diffuser may be set independently of the magnification of imaging optical elements (such as the collecting optical element) configured between the diffuser and the light exit. In general, in embodiments, a longer focal length may be preferred for the condenser optical element as the incoming light may have less divergence. Conversely, in embodiments, to collect the reflectively diffused light which may have larger divergence angles, assuming a more or less constant maximum diameter of the incoming and outgoing collimated beams (and respective optical components), a (relatively) shorter focal distance may be preferred. Such embodiments may especially be advantageous in improving system efficiency. Furthermore, in such embodiments and optionally with an additional optical element (such as e.g. a lens) magnification to the system output may be set independently. In embodiments, the diffuser, the condenser optical element, and the collecting optical element may be configured such that the diffuser is in the focal plane of both the condenser optical element and the collecting optical element. This may, however, not necessarily be the case. The herein described non-collinear diffuser assembly may allow for more freedom in the choice of optical elements and their respective positions in the light generating system. In embodiments, the condenser lens may be configured to create a spot of first device light on (the surface of) the diffuser. Especially, in embodiments, the condenser lens may be configured to create a spot of first device light being either sharp, i.e., in focus, or vague, i.e., out-of-focus. Furthermore, in embodiments, a non-imaging condenser optical element with an out-of-focus placement of the diffuser may also be applied to reduce hot spots of the device light. The diffuser may, in embodiments, be configured to diffuse the device light, such that the angular distribution may be scrambled, while the spot size may be maintained. Conversely to the condenser optical element, in embodiments, for the collecting optical element applies that it may be configured to re-collimate light received from the diffuser. In embodiments, the collecting optical element may thus be configured to re- collimate a spot of diffused device light, which may be in the focal plane of the collector 2024PF80055 39 optical element or optionally not in the focal plane. In some embodiments, the collecting optical element may (even) comprise two lenses, such that its focal strength may be improved. Hence, in embodiments, the diffuser may be configured out of a focal plane of one or more of the condenser optical element and the collecting optical element. Such embodiments may enable a wider range of spot sizes on the reflective diffuser and consequently a wider range of beam angles and the final cross-section dimensions of the outgoing diffused beam of first device light. Therewith, good color uniformity in the system light may be achieved. Hence, in specific embodiments, the first diffuser may be configured in the reflective mode, wherein the first diffuser assembly may be configured such that an optical axis of the second device light reaching the first diffuser and an optical axis of the diffused second device light reflecting from the first diffuser may not be co-axial; wherein the first diffuser assembly may comprise (i) a first condenser optical element configured in an optical path between the first redirection optical element and the first diffuser and (ii) a first collecting optical element configured in an optical path between the first diffuser and the one or more further redirection optical elements. Similarly, in specific embodiments, the second diffuser may be configured in the reflective mode, wherein the second diffuser assembly may be configured such that an optical axis of the third device light reaching the second diffuser and an optical axis of the diffused third device light reflecting from the second diffuser may not be co-axial; wherein the second diffuser assembly may comprise (i) a second condenser optical element configured in an optical path between the third light generating device and the second diffuser and (ii) a second collecting optical element configured in an optical path between the second diffuser and the one or more further redirection optical elements. In embodiments, the diffuser assembly may thus comprise a non-collinear diffuser assembly, wherein the diffuser may be configured in a reflective mode, such that the optical axis (Oi) of incoming device light and the optical axis (Or) of outgoing diffused device light (relative to the diffuser) may have an orthogonal direction relative to each other. Alternatively to the above described, in embodiments, the diffuser may be configured in the reflective mode, such that the optical axis (Oi) of incoming device light and the optical axis (Or) of outgoing diffused device light (relative to the diffuser) may have a parallel direction relative to each other. In other words, in such embodiments, the diffuser may be configured such that a direction of incoming device light and a direction of outgoing diffused device light (relative to the diffuser) may be parallel or collinear. In such 2024PF80055 40 embodiments, the incoming (first, second, and / or third) device light may especially comprise polarized light. Especially, in specific embodiments, the (first, second, and / or third) device light reaching the diffuser assembly may comprise linear polarized light, such as e.g. p- polarized light or s-polarized light. The diffuser assembly may further, in embodiments, comprise a polarization converter. Especially, in embodiments, the polarization converter may comprise a birefringent rotator, more especially a λ / 4 waveplate (or quarter waveplate). As known from the art, a waveplate or retarder is an optical device that may alter the polarization state of a light wave travelling through it depending on the orientation of the waveplate relative to the propagation direction and the state of polarization of the light wave. A halfwave plate may shift the polarization direction of linear polarized light (especially from s to p or from p to s polarization). Conversely, a quarter-wave plate may convert linear polarized light intoelliptically (such as especially circularly) polarized light (and vice versa). Especially, herein,in embodiments, the quarter waveplate may be configured to convert linear polarized light received by the quarter waveplate into elliptical (such as especially circularly) polarized light. Additionally or alternatively, in embodiments, the quarter waveplate may be configured to convert elliptical polarized light (such as especially circularly polarized light) received by the quarter waveplate into linear polarized light. The λ / 4 waveplate may especially be configured in an optical path between (relative to the propagation of light through the system) the redirection optical elements and the diffuser. As such, the redirection optical elements (such as e.g. the second redirection optical element) may thus be configured to direct (first, second, and / or further) device light received by the redirection optical elements and comprising (either) the first linear polarization or the second linear polarization (optionally via optics) to the polarization converter (i.e. the quarter waveplate). The quarter waveplate may, in embodiments, be configured to convert device light received by the quarter waveplate comprising a linear polarization into device light having a (first) circular polarization. At the diffuser, in embodiments, the device light having the (first) circular polarization may be diffused into diffused device light having a second circular polarization. Therefore, in embodiments, the quarter waveplate may also be configured to convert diffused device light received by the quarter waveplate (via the diffuser) and having the (second) circular polarization into diffused device light comprising a linear polarization. For example, in embodiments, p-polarized device light may be directed by the second beam combiner to the quarter waveplate. In such embodiments, the quarter waveplate may be configured to convert the p-polarized device light into left-handed circularly polarized device light. Further, in such 2024PF80055 41 embodiments, the diffuser may be configured to diffuse the left-handed circularly polarized device light received by the diffuser into right-handed circularly polarized diffused devicelight. The quarter waveplate may then, in embodiments, be configured to convert the right-handed circularly polarized diffused device light received by the quarter waveplate (back) to linear polarized light, especially to s-polarized 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 device light. Hence, in embodiments, the diffuser assembly may comprise an arrangement of a polarization converter and a diffuser. Further, in embodiments, the diffuser may comprise a static diffuser. Alternatively, in embodiments, the diffuser may comprise a dynamic diffuser, such as e.g. a rotating wheel comprising a reflective diffuser track. Furthermore, in such embodiments, the diffuser assembly may comprise condensing and collecting (or collimating) optical elements. In embodiments, the condensing and collecting optical elements may be located in an optical path between the collinear reflective diffuser and at least one of the light generating devices (such as e.g. between the diffuser and the polarization converter). In such embodiments, the condensing and collecting (or collimating) optical elements may comprise one or more positive lenses. As it may be advantageous to create a virtual diffused device light source with dimensions that are comparable to the luminescent material light, it may be preferred to apply a set of two, or possibly three positive condenser lenses to enable a large effective numerical aperture just as used in a reflective mode luminescent material configuration. For transmission efficiency as well as survival of the lenses, the induced stresses due to absorption of light may need to be limited. For this, in embodiments, a very low absorption glass with e.g. an internal transmission of at least 99.7% through 10 mm material may be applied. Hence, in embodiments, suitable glass materials may be selected from the group comprising: N-BK7, N-BK7HT, H-K9L, or H-K9LGT. Especially, in embodiments, the condenser and / or collecting optical elements may comprise fused silica (FS). Hence, in specific embodiments, the first diffuser may be configured in the reflective mode, wherein the first diffuser assembly may be configured such that an optical axis of the second device light reaching the first diffuser and an optical axis of the diffused second device light reflecting from the first diffuser may be co-axial. In such embodiments, the first diffuser assembly may comprise a first polarization converter configured in an optical path between the first diffuser and at least one of the one or more further redirection 2024PF80055 42 optical elements. Especially, in such embodiments, the first polarization converter may be configured to convert (i) second device light comprising the first linear polarization into second device light comprising an elliptical polarization, and (ii) diffused second device light comprising an elliptical polarization into diffused second device light comprising a first second linear polarization. Similarly, in specific embodiments, the second diffuser may be configured in the reflective mode, wherein the second diffuser assembly may be configured such that an optical axis of the third device light reaching the second diffuser and an optical axis of the diffused third device light reflecting from the second diffuser may be co-axial. In such embodiments, the second diffuser assembly may comprise a second polarization converter configured in an optical path between the second diffuser and at least one of the one or more further redirection optical elements. Especially, in embodiments, the second polarizationconverter may be configured to convert (i) third device light comprising a linear polarizationinto third device light comprising an elliptical polarization, and (ii) diffused third device light comprising an elliptical polarization into diffused third device light comprising a linear polarization different from the linear polarization of the third device light propagating (in the first operational mode) to the second polarization converter. Yet alternatively to the above described embodiments, one or both of the first diffuser (assembly) and the second diffuser (assembly) may be configured in the transmissive mode. In such embodiments, the diffuser may thus be configured to diffuse (or scatter) and transmit the (first, second, and / or third) device light received by the diffuser. The diffuser may especially do so independently of the polarization of the device light. In addition, the transmissive diffuser may not need to preserve the polarization of the incident device light, i.e., the polarization of the diffused device light may be substantially equal to or may be substantially different from the non-diffused incident device light. Further, in such embodiments, the diffuser assembly may comprise condensing and collecting (or collimating) optical elements. In embodiments, the condensing and collecting optical elements may be located in an optical path (i) between the transmissive diffuser and at least one of the light generating devices (such as e.g. between the first redirection optical element and the diffuser) and / or (ii) between the transmissive diffuser and the light exit (such as e.g. between the diffuser and one of the one or more further redirection optical elements). In such embodiments, the condensing and collecting (or collimating) optical elements may comprise one or more positive lenses. As it may be advantageous to create a virtual diffused device light source with dimensions that are comparable to the luminescent material light, it may be 2024PF80055 43 preferred to apply a set of two, or possibly three positive condenser lenses to enable a large effective numerical aperture just as used in a reflective mode luminescent materialconfiguration. For transmission efficiency as well as survival of the lenses, the inducedstresses due to absorption of light may need to be limited. For this, in embodiments, a very low absorption glass with e.g. an internal transmission of at least 99.7% through 10 mm material may be applied. Hence, in embodiments, suitable glass materials may be selected from the group comprising: N-BK7, N-BK7HT, H-K9L, or H-K9LGT. Especially, in embodiments, the condenser and / or collecting optical elements may comprise fused silica (FS). Hence, in embodiments, one or more of the luminescent material, the first diffuser, and the second diffuser may be configured in the transmissive mode. The light generating system may thus be configured to generate luminescent material light (at the luminescent material), diffused second device light (at the first diffuser), and diffused third device light (at the second diffuser). To generate the (combined) system light, in embodiments, the redirection optical elements may be configured to combine the different types of light. Especially, in embodiments, the one or more further redirection optical elements may be configured to direct the luminescent material light, the diffused second device light and the diffused third device light to the light exit. As described above, in embodiments, the one or more further redirection optical elements may comprise the second redirection optical element. In embodiments, the second redirection optical element may comprise the dichroic beam combiner (DBC1). Additionally, in embodiments, the second redirection optical element may further comprise a (second) polarizing beam splitter (PBS2). The (second) polarizing beam splitter (PBS2) may, in embodiments, be configured to (re-)direct the second device light and the diffused second device light into different optical paths, respectively. Hence, in embodiments, the (second) polarizing beam splitter (PBS2) may be configured in a light-receiving relationship with the second light generating device (at least via the first redirection optical element) and the first diffuser. Especially, in embodiments, the polarizing beam splitter (PBS2) may be configured to separate the second device light from the diffused second device light in dependence of their respective polarizations. In embodiments, the polarizing beam splitter (PBS2) may be configured to transmit the second device light received by the second redirection optical element and to reflect the diffused second device light received by the second redirection optical element. Alternatively, in embodiments, the polarizing beam splitter (PBS2) may be configured to reflect the second device light received by the second redirection optical 2024PF80055 44 element and to transmit the diffused second device light received by the second redirection optical element. The (second) polarizing beam splitter (PBS2) may, in embodiments, comprise a discrete redirection optical element, i.e., an element separate from the second redirection optical element (comprising the dichroic beam combiner DBC1)). Alternatively, in embodiments, the (second) polarizing beam splitter (PBS2) and the dichroic beam combiner (DBC1) may be combined into a single (second) redirection optical element. Hence, in such embodiments, the second redirection optical element may comprise a combined PBS&DBC. Yet in embodiments, the second redirection optical element may comprise a polarizing beam splitter (PBS1) having further spectral requirements. Especially, in embodiments, the second redirection optical element may be configured to combine the luminescent material light, the diffused second device light, and the diffused third device light into a same optical path to the light exit, i.e., therewith providing the system light. The light generating system may thus, in embodiments, be configured to generate system light comprising at least part of the luminescent material light, at least part of the diffused second device light, and at least part of the diffused third device light. Therefore, in embodiments, in an operational mode of the light generating system the system light may be white light. 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 specific embodiments, the correlated color temperature (CCT) may be selected from the range of 2700 K and 6500 K, in combination with a CRI of at least 75, such as at least 80. 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 75, such as at least 80, like at least 85, especially at least 90. To achieve white light having such CCT and CRI ranges, the addition of the red third device light as described in this invention may be especially beneficial because of inadequate red spectral contributions in high brightness luminescent material light. 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) is especially within about 15 SDCM (standard deviation of color matching) from the BBL (black body 2024PF80055 45 locus), especially within about 10 SDCM from the BBL, even more especially within about 5 SDCM from the BBL. In specific embodiments, the correlated color temperature (CCT) may be selected from the range of 2000-12000K, such as 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 2000-12000K, such as 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 65, such as at least 70. In an embodiment, the light source may also provide light source light having a correlated color temperature (CCT) between about 5000 and 20000 K, e.g. direct phosphor converted LEDs (blue light emitting diode with thin layer of phosphor for e.g. obtaining of 10000 K). Hence, in a specific embodiment the light source is configured to provide light source light with a correlated color temperature in the range of 5000-20000 K, even more especially in the range of 6000-20000 K, such as 8000-20000 K. An advantage of the relative high color temperature may be that there may be a relatively high blue component in the light source light. 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 2000-10000 K and a color rendering index of at least 65. As indicated above, in embodiments, the light generating system may comprise a control system. In embodiments, the control system may especially be configured to control the spectral power distribution of the system light. Additionally or alternatively, in embodiments, the control system may be configured to control the correlated color temperature of the system light. Additionally or alternatively, in embodiments, the control system may be configured to control the color rendering index of the system light. Additionally or alternatively, in embodiments, the control system may be configured to control the color gamut of the system light. Yet additionally or alternatively, in embodiments, the control system may be configured to control the radiant flux of the system light. Especially, in embodiments, the control system may be configured to control the optical characteristics (such as spectral power distribution, CCT, etc.) of the system light by controlling (the light generating devices and / or) the polarization control system. In embodiments, the control system may be configured to control the optical characteristics (such as spectral power distribution, CCT, etc.) of the system light in dependence of one or more of an input signal of a user interface, a sensor signal, and a timer. 2024PF80055 46 The term “controlling” and similar terms especially refer at least to determining the behavior or supervising the running of an element. Hence, herein “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, the lighting system may be identifiable with a code, especially a unique code for the respective lighting 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 ofknowledge (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, 2024PF80055 47 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 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 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 specific embodiments, the control system may be configured to control one or more of the spectral power distribution and the radiant flux of the system light, 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 may be configured to control one or more of the spectral power distribution and the radiant flux of the system light, such that in a second operational mode the system light may have a second correlated color temperature (CCT2). Especially, in embodiments, the control system may be configured, such that the CCT may be altered from CCT1 in the first operational mode to CCT2 in the second operational mode, and vice versa. Further, in embodiments, CCT2- CCT1≥200 K, like CCT2-CCT1≥400 K, like at least 500 K, such as CCT2-CCT1≥600 K, especially CCT2-CCT1≥800 K. Especially, in embodiments, CCT2-CCT1≥1000 K, more especially CCT2-CCT1≥1500 K. Further, in embodiments, CCT2-CCT1 may be at most 5000K, such as at most 3000K, like at most 2500K. Hence, in embodiments, the control system may be configured to control one or more of the spectral power distribution and the radiant flux of the system light by controlling the polarization control system and optionally a drive current supplied to (optionally the first and / or second light generating device and) the third light generating device, such that: (i) in the first operational mode the system light may have a first correlated color temperature (CCT1), and (ii) in a second operational mode thesystem light may have a second correlated color temperature (CCT2); and wherein |CCT2-CCT1| ≥ 500 K. 2024PF80055 48 Additionally or alternatively, in embodiments, the control system may e.g. control optical characteristics of the system light by controlling the polarization of device light in the light generating system (e.g. through the use of a polarizing beam splitter as described above). The light generating system may thus be controlled by controlling the polarization of different types of light propagating in the light generating system. Therefore, in embodiments, the light generating system may comprise the polarization control system. The polarization control system may, in embodiments, be configured to control the polarization of one or more of the first device light and the second device light reaching the first redirection optical element. The polarization control system may especially be configured to provide, in an optical path to the first redirection optical element, an adjustable contribution of (a) (first and second) device light comprising a first linear polarization and (b) (first and / or second) device light comprising a second linear polarization different from the first linear polarization. Especially, in embodiments, the polarization control system may be configured to control an adjustable intensity (or power) contribution of (the first part of) the second device light comprising the first linear polarization relative to (the second part of) the second device light comprising the second linear polarization to the first redirection optical element. As such, the (blue) optical power provided to the luminescent material versus the (blue) optical power provided to the first diffuser assembly may be controlled. In embodiments, the adjustable intensity (and / or power) contribution may be selected from the range of 0% of the second device light comprising the first linear polarization (and thus 100% of the second device light comprising the second linear polarization) to the first redirection optical element, to 100% of the second device light comprising the first linear polarization (and thus 0% the second device light comprising the second linear polarization) to the first redirection optical element. In other words, the adjustable intensity (and / or power) contribution may be selected from the range of 0% of the second device light comprising the second linear polarization (and thus 100% of the second device light comprising the first linear polarization) to the first redirection optical element, to 100% of the second device light comprising the second linear polarization (and thus 0% the second device light comprising the first linear polarization) to the first redirection optical element. For example, in embodiments, the contribution of the second device light comprising the first linear polarization (to the first redirection optical element) may be 20%, whereas the contribution of the second device light comprising the second linear polarization (to the first redirection optical element) may be 80%. In another example, those contributions 2024PF80055 49 may be 30% and 70%, 40% and 60%, or vice versa. In specific embodiments, the contribution of the second device light comprising the first linear polarization (to the first redirection optical element) and the contribution of the second device light comprising the second linear polarization (to the first redirection optical element) may both be 50%. Note that, in embodiments, an adjustable intensity contribution of (blue) optical power provided to the luminescent material versus (blue) optical power provided to the first diffuser assembly may also be achieved using two (second) light generating devices configured to provide (second) device light having (slightly) different centroid wavelengths, of which the respective device light may be combined using an additional dichroic beam combiner. In such embodiments, the first redirection optical element may further be configured having additional spectral characteristics. Especially, in such embodiments, the first redirection optical element may be configured to transmit (or reflect) the (second) device light having one of the different centroid wavelengths, and to split the (second) device light having the other one of the different centroid wavelengths in dependence of its polarization. However, in specific embodiments, the polarization control system may be configured to provide an adjustable intensity (and / or power) contribution of the second device light comprising the second linear polarization and second device light comprising the first linear polarization to the first redirection optical element. Therefore, in embodiments, the polarization control system may comprise one or more of a first retarder element (like a first retarder plate), a movement element, and optionally an additional retarder element (like an additional retarder plate). The first retarder element may, in embodiments, be configured in an optical path between the first redirection optical element and the second (or another one of the one or more further) redirection optical element(s). Alternatively, in embodiments, the first retarder element may be configured in an optical path between (i) the first light generating device and the first redirection optical element or (ii) the second light generating device and the first redirection optical element. Furthermore, in embodiments, the polarization control system (and thus the light generating system) may comprise an additional retarder element. In such embodiments, the additional retarder element may be configured downstream of the first redirection optical element and upstream of the first diffuser assembly. In any case, in embodiments, the (first and optionally additional) retarder element may be configured to dictate the polarization of light propagating from the retarder element. Especially, in embodiments, the (first and optionally additional) retarder element may be configured to change the polarization of device light received by the retarder element 2024PF80055 50 in dependence of the orientation of the retarder element. Therefore, in embodiments, the (first and optionally additional) retarder element may comprise one or more of a birefringent rotator such as a λ / 2 waveplate or a λ / 4 waveplate, a liquid crystal polarization rotator, a Faraday rotator, a Fresnel rhomb, and a diffractive waveplate. Especially, in embodiments, the first retarder element may comprise a λ / 2 waveplate. Similarly, in embodiments, the additional retarder element may comprise a λ / 2 waveplate. However, in embodiments, other types of birefringent rotators (such as e.g. a λ / 4 waveplate) may herein not be excluded.Hence, in embodiments, the retarder element may comprise a retarder plate. In embodiments,the control system may be configured to control the polarization control system. As such, in embodiments, the control system may be configured to control rotation of the (first and optionally additional) retarder element. By changing the orientation of the retarder element relative to an optical axis of the device light received by the retarder element, the polarization of said device light may change. The movement element may, in embodiments, be configured to (move, especially) rotate (at least) the second light generating device (about its optical axis (O2)). Additionally or alternatively, in embodiments, the movement element may be configured to rotate one or more of the other light generating devices. Therefore, in embodiments, the movement element may e.g. comprise an actuator. In embodiments, the control system may be configured to control the polarization control system. As such, in embodiments, the control system may be configured to control (movement, especially) rotation of the light generating device(s) by controlling the movement element. By changing the orientation of the light generating devices relative to downstream configured optics (such as e.g. the first redirection optical element), the polarization of said device light propagating to the receiving optics (such as propagating to the first redirection optical element) may change. Note that, in embodiments, the orientations of the retarder element and / or the light generating devices as described above may also be factory set and fixated by a fixating means (such as e.g. a screw). Hence, in specific embodiments, the light generating system may further comprise further a polarization control system, wherein the polarization control system may comprise one or more of: (A) a first retarder plate configured downstream of (at least) the second light generating device and upstream of the first redirection optical element, wherein the control system may be configured to control rotation of the first retarder plate; and wherein the first retarder plate may comprise a λ / 2 waveplate; and (B) a movement element configured to rotate (at least) the second light generating device (about its optical axis (O2)), wherein the control system may be configured to control the movement element. 2024PF80055 51 Furthermore, in embodiments, the polarization control system may comprise an additional retarder plate configured downstream of the first redirection optical element and upstream of the first diffuser assembly. Such an additional retarder plate may, in embodiments, be fixated such that it may rotate the polarization plane of the second part of the second device light received by the additional retarder plate. In embodiments, the additional retarder plate may comprise a λ / 2 waveplate. Therefore, the additional retarder plate may especially be fixated such that it may rotate the polarization plane of the second part of the second device light (received by the additional retarder plate) by (about) 90°. As described above, in embodiments, the light generating system may thus combine or split light based on its spectral power distribution and / or its polarization. Yet further, in embodiments, the one or more further redirection optical elements may comprise a neutral redirection optical element. In embodiments, the neutral redirection optical elementmay be configured to transmit or reflect light received by the neutral redirection opticalelement in dependence of Fresnel reflection or reflection from an interference coating of the light received by the neutral redirection optical element, therewith resulting in (two) separate beams. Especially, in embodiments, the neutral redirection optical element may especially comprise one or more stacks of dielectric layers configured to tune the beam splitting properties without specific (or intended) spectral or polarization preferences. Additionally or alternatively, in embodiments, the one or more further redirection optical elements may comprise a geometric beam combiner. A geometric beam combiner (GBC) may comprise a plate comprising geometric-optical features that may correlate to a geometrical distribution of light sources configured to provide light to the geometric beam combiner. As such, in embodiments, light from part of the light sources (configured to provide light to the GBC) may be reflected by the geometric beam combiner. In other words, light from part of the light sources (configured to provide light to the GBC) may be redirected (by the GBC) in a direction substantially different from the direction of the incident light. Conversely, in embodiments, light from another part of the light sources (configured to provide light to the GBC at a different location on the GBC than the previous part) may be transmitted by the geometric beam combiner. Therefore, in embodiments, at least part of the first beam combiner may comprise a light transmissive, especially a light transparent, material. In other words, light from part of the light sources (configured to provide light to the GBC) may be directed (by the GBC) in a direction substantially equal to the direction of the incident light. Such reflection or transmission of the light may, in embodiments, depend on the geometric-optical design of the geometric beam combiner. 2024PF80055 52 Hence, in embodiments, a geometric beam combiner may provide geometric (or spatial) beam combining functionality as it may combine two incident device light source beams into an output (or combined) beam with an etendue that may be smaller than the sum of the etendues of the two incident device light beams, where the etendue may refer to the smallest outer circumference of a light beam , i.e., independent of their polarization and / or wavelength. In some embodiments, the geometric beam combiner (or geometric beam redirector) may be configured to transmit or reflect light received by the geometric beam combiner in dependence of its angle of incidence relative to a surface normal (Ni) of the geometric beam combiner. Additionally or alternatively, in embodiments, the geometric beam combiner may be configured to transmit or reflect light received by the geometric beam combiner in dependence of its total internal reflection relative to the geometric beam combiner. In particular, the geometric beam combiner may be engineered such that light incident on different spatial locations on the geometric beam combiner may be differently redirected, e.g. transmitted or reflected. Especially, in embodiments, the geometric beam combiner may be engineered such that the transmissive and reflective optical features of the geometric beam redirector may be tailored to the geometries of the light sources in the light generating devices (e.g. the lasers in a laser bank). As such, in embodiments, the geometric beam combiner may be configured to combine device light received from two different optical paths (e.g. first device light and second device light orthogonally provided to the geometric beam redirector) into the same optical path (or direction). Such embodiments may be beneficial as optical power of different light generating devices may be combined without the need for expensive polarization based optical elements and / or differing wavelengths in the device light. In embodiments, such as indicated above, the redirection optical elements may thus at least partially comprise a light (transmissive, especially a light) transparent material. For example, in embodiments, at least part of the first redirection optical element may comprise a material selected from the group comprising: a glass material, a polymeric material (like PMMA or PC), and a ceramic material. The one or more further redirection optical elements may, in embodiments, comprise another dichroic beam splitter (aside from the second redirection optical element). In embodiments, a dichroic beam splitter may be configured in an optical path between (i) the first redirection optical element and the luminescent material, and (ii) the luminescent material and the second redirection optical element. Such a dichroic beam splitter may, in 2024PF80055 53 embodiments, be configured to transmit (e.g. yellow-green) luminescent material light (received by the dichroic beam splitter), while reflecting (blue and red) first, second and third (diffused) device light (received by the dichroic beam splitter). Conversely, in embodiments, the dichroic beam splitter may be configured to reflect (e.g. yellow-green) luminescent material light (received by the dichroic beam splitter), while transmitting (blue and red) first, second and third (diffused) device light (received by the dichroic beam splitter). Such embodiments may be realized by applying polarization-independent spectral filtering (i.e. polarization-independent DBS functionality). Alternatively, such embodiments may be realized by applying polarization-dependent filtering in a (wavelength) band around (or comprising) the (red) third centroid wavelength (λc3) (i.e. PBS functionality for red light with further spectral requirements for blue / yellow / green light). Such embodiments may be beneficial as it may reduce luminescent material light output loss in case of spectral overlap of the third device light with the luminescent material light. Alternatively, in embodiments, such a dichroic beam splitter may be configured to transmit (e.g. yellow-green) luminescent material light (received by the dichroic beam splitter), while reflecting (blue) first and second (diffused) device light (received by the dichroic beam splitter), without any specific requirements for the (red) third (diffused) device light. Conversely, in embodiments, such a dichroic beam splitter may be configured to reflect (e.g. yellow-green) luminescent material light (received by the dichroic beam splitter), while transmitting (blue) first and second (diffused) device light (received by the dichroic beam splitter), without any specific requirements for the (red) third (diffused) device light. Hence, in embodiments, one or more further redirection optical elements may comprise another dichroic beam splitter (aside from the second redirection optical element). Such a dichroic redirection optical element may be characterized by its cut-off wavelengths similarly to the second redirection optical element as described above. In embodiments, the light generating system may for example comprise the first redirection optical element (i.e. the polarizing beam splitter (PBS1)), the second redirection optical element (i.e., the combined (second) polarizing beam splitter and dichroic beam combiner PBS2&DBC1), a further dichroic beam redirector, and a further polarizing beam redirector. In such embodiments, the first redirection optical element may be configured (i) to combine first device light and the first part of the second device light into a same optical path to the luminescent material (e.g. via the dichroic beam redirector) throughpolarization multiplexing, and (ii) to direct the second part of the second device light in anoptical path to the second redirection optical element. The first redirection optical element 2024PF80055 54 may thus especially be configured to distribute (blue) device light over a luminescent material optical channel and a first diffusion optical channel. The polarizing beam redirector may, in such embodiments, be configured (i) to direct the third device light into an optical path to the second diffuser assembly, and (ii) to direct the diffused third device light into an optical path to the dichroic beam redirector. The polarizing beam redirector may thus especially be configured to provide (red) device light to a second diffusion optical channel, and split the incoming (red) device light from the outgoing (reflectively) diffused (red) device light. The dichroic beam redirector may, in such embodiments, be configured (i) to direct the first device light and the first part of the second device light to the luminescent material, and (ii) to direct the luminescent material light and the diffused third device light into an optical path to the second redirection optical element. The dichroic beam redirector may thus especially be configured to combine (yellow) luminescent material light with diffused (red) device light, and provide the combined light into an optical path to the light exit (via the second redirection optical element). In such embodiments, the second redirection optical element may then be configured (i) to direct the second part of the second device light to the first diffuser assembly, and (ii) to direct the diffused second device light, the diffused third device light, and the luminescent material light into a same optical path to the light exit. The second redirection optical element may thus especially be configured to combine diffused (blue) device light with the (yellow) luminescent material light and diffused (red) device light to provide the system light, and direct the system light into an optical path to the light exit. In an alternative example, in embodiments, the light generating system may comprise a non-collinear second diffuser assembly (as described above) and may therefore not require a polarizing beam redirector to split the incoming (red) device light from the outgoing (reflectively) diffused (red) device light. Yet in an alternative example, in embodiments, the light generating system may for example comprise the first redirection optical element (i.e. the polarizing beam splitter (PBS1)), the second redirection optical element (i.e., the dichroic beam combiner DBC1), a further combined dichroic and polarizing beam redirector, and a further polarizing beam redirector. In such embodiments, the first redirection optical element may be configured (i) to combine first device light and the first part of the second device light into a same optical path to the luminescent material (e.g. via the second redirection optical element) through polarization multiplexing, and (ii) to direct the second part of the second device light in an optical path to the combined dichroic and polarizing beam redirector. The first 2024PF80055 55 redirection optical element may thus especially be configured to distribute (blue) device light over the luminescent material optical channel and the first diffusion optical channel. The polarizing beam redirector may, in such embodiments, be configured (i) to direct the third device light into an optical path to the second diffuser assembly, and (ii) to direct the diffused third device light into an optical path to the combined dichroic and polarizing beam redirector. The polarizing beam redirector may thus especially be configured to provide (red) device light to the second diffusion optical channel, and split the incoming (red) device light from the outgoing (reflectively) diffused (red) device light. In such embodiments, the combined dichroic and polarizing beam redirector may then be configured (i) to direct the second part of the second device light to the first diffuser assembly, and (ii) to direct the diffused second device light and the diffused third device light into a same optical path to the second redirection optical element. The combined dichroic and polarizing beam redirector may thus especially be configured to combine diffused (blue) device light with the diffused (red) device light, and provide the combined light into an optical path to the light exit (via the second redirection optical element). The second redirection optical element may, in such embodiments, be configured (i) to direct the first device light and the first part of the second device light to the luminescent material, and (i) to direct the luminescent material light, the diffused second device light, and the diffused third device light into an optical path to the light exit. The second redirection optical element may thus especially be configured to combine (yellow) luminescent material light with diffused (blue) device light and diffused (red) device light to provide the system light, and direct the system light into an optical path to the light exit. Note that, in embodiments, different configurations using combinations of the above described redirection optical elements may be possible as may be understood by the person skilled in the art. The basic differentiation between the embodiments covered may consist in the use of polarization-based redirection components and associated quarter wave plates in the diffusion channels, and in the combination or separation of polarization-based and dichroic-based redirection functionality in case of presence of further redirection optical elements. Furthermore, the differentiation between the embodiments covered may be due to choices between reflective and transmissive diffuser assemblies, collinear and non-collinear reflective diffuser assemblies, and transmissive of reflective luminescent material assemblies. Further examples are highlighted below in the detailed description. Hence, in embodiments, one or more of the one or more further redirection optical elements may be selected from the group comprising: (A) a dichroic beam redirector 2024PF80055 56 configured to transmit or reflect light received by the dichroic beam redirector in dependence of its spectral power distribution; (B) a (partially) polarizing beam redirector configured to transmit or reflect light received by the polarizing beam redirector in dependence of its (linear) polarization; and (C) a geometric beam redirector configured to transmit or reflect light received by the geometric beam redirector in dependence of a position of incidence of the light on the geometric beam redirector. As indicated above, the luminescent material may give rise to quite a lot of thermal dissipation. Similarly, the (reflective) diffuser assemblies may generate heat which may be detrimental to the (efficiency of the) light generating system. Therefore, in embodiments, the light generating system may comprise a rotating element, such as e.g. a phosphor wheel or a phosphor rod. In such embodiments, one or more of the luminescent material, the first diffuser, and the second diffuser may be configured on the rotating element, such as especially at least the luminescent material. Hence, in embodiments, the (first and / or second) diffuser may comprise a static diffuser or a dynamic diffuser, such as a rotating wheel with a reflective diffuser track. Additionally to the redirection optical elements, in embodiments, the light generating system may comprise optics configured such that the diffused (second and / or third) device light and the luminescent material light may be provided to the light exit. 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 mirrors, reflectors, collimators, lenses, prisms, diffusers, phase plates, polarizers, diffractive elements, gratings, dichroics, 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”). Further, in embodiments, as the system light may thus comprise a combination of diffused device light and luminescent material light, it may be desired to integrate (or angularly re-distribute) the different types of light, such that homogeneity of the system light may be improved. Therefore, in embodiments, the light generating system may further comprise a(t least one) optical integrator. Especially, in embodiments, the optics may comprise one or more optical integrators. Herein, an optical integrator may refer to an opticalelement configured to homogenize light received by the optical integrator (, i.e., to provide amore uniform beam of light than the beam of light that was incident on the optical 2024PF80055 57 integrator). The optical integrator may herein especially be configured transmissive for the device light. Additionally, in embodiments, the optical integrator may further be configured transmissive for the luminescent material light. In embodiments, the one or more optical integrators may comprise a material (individually) selected from the group comprising: a glass material (having a high transmission in the device light spectral range), a silicone-based material, a transparent ceramic material (such as e.g. sapphire), and a polymeric material. For example, in embodiments, the optical integrator may comprise (etched) fused silica. In another example, in embodiments, the optical integrator may comprise a(n engineered) substrate comprising a sol-gel coating. Especially, in embodiments, the optical integrators may be individually selected from the group comprising: a small-angle diffuser, a transmissive volume diffuser, a transmissive surface diffuser, a reflective surface diffuser, a transmissive or reflective diffractive optical element, an engineered diffuser (such as a flat-top, or top-hat diffuser), a gaussian(-like) diffuser, a transmissive holographic optical element, a single multi lens array, a double multi lens array such as a fly-eye lens array pair, and an integrating polygonal light pipe. In embodiments, at least one optical integrator may be configured in an optical path between the first redirection optical element and the first diffuser (assembly). Hence, insuch embodiments, the optical integrator may be configured in a light-receiving relationshipwith the first redirection optical element. The optical integrator may especially be configured to (transmit and) angularly re-distribute the (first and / or second) device light received by the optical integrator, such that a small-angle redistributed beam comprising the device light may be provided. Especially, the optical integrator may be configured to provide the small-angle redistributed beam comprising the device light (received by the optical integrator) in an optical path to the first diffuser (assembly). In turn, the first diffuser (assembly) may thus be configured in a light-receiving relationship with the optical integrator. Such embodiments may be beneficial as the optical integrator may allow control of the size of the beam of light propagating from the optical integrator through the system. Furthermore, the optical integrator may provide a more uniformly distributed beam of light propagating from the optical integrator through the system, which may improve efficiency of the light generating system. Similarly, in embodiments, at least one optical integrator may be configured in an optical path between the third light generating device and the second diffuser (assembly). 2024PF80055 58 Additionally or alternatively, in embodiments, at least one optical integrator may be configured in an optical path between the (first and / or second) light generating device and the first redirection optical element. As the device light emitted from the light generating devices (e.g. laser banks) may, in embodiments, comprise multiple narrow laser beams, each of said 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 converter may exceed the maximum tolerable local irradiance and may result in damage to the luminescent material. Therefore, some homogenizing optics may be applied for each beam of device light to remove or reduce the hot spots. Hence, angular re-distribution of light such as described above may not only be beneficial to the (first and / or second) diffuser assembly, but also to the conversion channel (i.e. luminescent material pathway) of the light generating system. Therefore, in embodiments, the light generatingsystem may (also) comprise an optical integrator configured in an optical path between thefirst redirection optical element and the luminescent material. In some embodiments, the optical integrator of the first diffuser assembly, the second diffuser assembly, and the optical integrator of the converter channel may be essentially the same optical integrator. However, in other embodiments, the optical integrator of the first diffuser assembly, the second diffuser assembly, and the optical integrator of the converter channel may be separate (or distinct) optical components. Furthermore, in embodiments, the light generating system may comprise additional optical integrators. For example, in embodiments, the light generating system may comprise an optical integrator configured downstream of both the diffuser assembly and theluminescent material and upstream of the light exit. Especially, in such embodiments, (atleast one) optical integrator may be configured upstream of the light exit and downstream of the one or more further redirection optical elements. Hence, in such embodiments, the optical integrator may be configured to integrate (or angularly and / or spatially re-distribute) the diffused (second and / or third) device light and the luminescent material light received by the optical integrator into homogenized system light. In embodiments, the (one or more) optical integrator(s) may comprise a small- angle diffuser. Small-angle diffusers may have a dual functionality: a) define a spot diameter of light incident on the e.g. the reflective diffuser or the luminescent material, and b) reduce hot spots in the projected spot on e.g. the reflective diffuser or the luminescent material.Especially, in embodiments, the optical integrator may (comprise a small angle diffuser thatmay) be configured to re-distribute incoming (device) light such that the light may have a 2024PF80055 59 controlled (angular and / or spatial) re-distribution. Especially, in embodiments, the small- angle diffuser may be configured to re-distribute incoming (device) light such that the light may have a FWHM selected from the range of 1-50°, such as from the range of 2-40°, like from the range of 3-30°, especially from the range of 5-20°. In embodiments, the optical integrator may thus comprise a small angle diffuser configured to re-distribute incoming device light, such that device light propagating from the optical integrator may have a FWHM selected from the range of 1-50°. Similarly, in embodiments, other transmissive integrator elements comprised by the light generating system may comprise small-angle diffusers as described here. Furthermore, in embodiments, the optical integrator may comprise a top-hat diffuser. Especially, in such embodiments, the top-hat diffuser may be configured to provide an angular distribution (of light) with a half-width-half-maximum (HWHM) selected from the range of 1-15°, such as from the range of 1-10°, like from the range of 2-8°, such as from the range of 3-6°, like e.g. a HWHM of 5°. The optics of the light generating system may further comprise one or more of condensing and / or collecting optics. For example, as described above, the (first and / or second) diffuser assemblies may comprise (first and / or second) condensing and / or collimating optical elements. In embodiments, the light generating system may comprise additional condensing and / or collimating optical elements (or “optics”) similar to the ones described above for the diffuser assemblies. Especially, in embodiments, condensing and / or collimating optics (such as e.g. positive lenses) may be configured in an optical path between at least one of the one or more further redirection optical elements and the luminescent material. Additionally or alternatively, in embodiments, condensing and / or collimating optics may be configured in an optical path between at least one of the one or more further redirection optical elements and the first diffuser. Additionally or alternatively, in embodiments, condensing and / or collimating optics may be configured in an optical path between (any of ) the (other) optics (such as e.g. the redirection optical elements) and the second diffuser. Yet additionally or alternatively, in embodiments, condensing and / or collimating optics may be configured in an optical path upstream of the light exit and downstream of at least one of the one or more further redirection optical elements. 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, 2024PF80055 60 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 generating system (or luminaire) may be part of or may be applied in e.g. optical communication systems 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 embodiments, especially for lighting applications, the terms “light” and “radiation” refer to (at least) visible light. The terms “red light” or “red emission” especially relate to light having a wavelength in the range of about 620-780 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 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 be 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 2024PF80055 61 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. The term “light source” may also relate to a plurality of light sources, such as 2-2000 (solid state) LED light sources. The light source may have a light escape surface. The term escape surface especially relates to that part of the light source, where the light actually leaves or escapes from the light source. The light source is configured to provide a beam of light. This beam of light (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. A position where system light escapes from the light generating system may also be indicated as light exit. This may 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 term “light source” may also relate to a plurality of (essentially identical (or different)) light sources, such as 2-2000 solid state light sources. 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. 2024PF80055 62 Secondary radiation may be based on conversion by a luminescent material. The secondary radiation may therefore also be indicated as luminescent material radiation. In embodiments, the light generating device may comprise a luminescent material. In embodiments, the light generating device may comprise a phosphor converted LED (or PC LED). In other embodiments, the light generating device may comprise a direct LED (i.e. no phosphor). In embodiments, the light generating device may comprise a laser device, like a laser diode. In embodiments, the light generating device may comprise a superluminescent diode. Hence, in specific embodiments, the light source may be selected from the group of laser diodes and superluminescent diodes. In other embodiments, the light source may comprise an LED. In yet other embodiments, the light source may comprise a photonic crystal LED, a photonic crystal edge emitting laser diode (PC EELD), or a photonic crystal surface emitting laser (PCSEL), see also further below. 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. 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. 2024PF80055 63 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 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 cerium doped lithium strontium (or calcium) aluminum fluoride (Ce:LiSAF, Ce:LiCAF), chromium doped chrysoberyl (alexandrite) laser, chromium ZnSe (Cr:ZnSe) laser, divalent samarium doped calcium fluoride (Sm:CaF2) laser, Er:YAG laser, erbium doped and erbium–ytterbium codoped glass lasers, F-Center laser, holmium YAG (Ho:YAG) laser, Nd:YAG laser, NdCrYAG laser, neodymium doped yttrium calcium oxoborate Nd:YCa4O(BO3)3 or Nd:YCOB, neodymium doped yttrium orthovanadate (Nd:YVO4) laser, neodymium glass (Nd:glass) laser, neodymium YLF (Nd:YLF) solid-state laser, promethium 147 doped phosphate glass (147Pm3+:glass) solid-state laser, ruby laser (Al2O3:Cr3+), thulium YAG (Tm:YAG) laser, titanium sapphire (Ti:sapphire; Al2O3:Ti3+) laser, trivalent uranium doped calcium fluoride (U:CaF2) solid-state laser, Ytterbium doped 2024PF80055 64 glass laser (rod, plate / chip, and fiber), Ytterbium YAG (Yb:YAG) laser, Yb2O3(glass or ceramics) laser, etc. For instance, including second and third harmonic generation embodiments, the light source may comprise one or more of an F center laser, an yttrium orthovanadate (Nd:YVO4) laser, a promethium 147 doped phosphate glass (147Pm3+:glass), and a titanium sapphire (Ti:sapphire; Al2O3:Ti3+) laser. For instance, considering second and third harmonic generation, such light sources may be used to generated blue light. In embodiments, the terms “laser” or “solid state laser” or “solid state material laser” may refer to one or more of a semiconductor laser diode, such as a GaN, InGaN, AlGaInP, AlGaAs, InGaAsP, or lead salt edge emitting semiconductor laser, vertical cavity surface emitting laser (VCSEL), photonic crystal surface emitting laser (PCSEL), quantum cascade laser, hybrid silicon laser, etc. A laser may be combined with an upconverter in order to arrive at shorter (laser) wavelengths. For instance, with some (trivalent) rare earth ions upconversion may be obtained or with non-linear crystals upconversion can be obtained. Alternatively, a laser can be combined with a downconverter, such as a dye laser, to arrive at longer (laser) wavelengths. 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 specific embodiments, the term “laser light source” may refer to a plurality N of (identical) laser light sources. In embodiments, N=2, or more. In specific embodiments, N may be at least 5, such as especially at least 8. In this way, a higher brightness may be obtained. In embodiments, laser light sources may be arranged in a laser bank (see also 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 2024PF80055 65 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 room temperature (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. 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 the discrete 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. Collimationmay be executed with one or more (other) optics, like collimation elements, such as lensesand / 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 2024PF80055 66 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) 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. 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 of a broad spectrum like an LED, while having a brightness in the order of a laser diode. Especially, a superluminescent diode may be a semiconductor light source, where the spontaneous emission light is amplified by stimulated emission in the active region of the device. Such emission is called “super luminescence”. Superluminescent diodes 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 speckleis 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. 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. 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 2024PF80055 67 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 stage lighting device, an automotive headlight, an (entertainment) moving head lighting device, a spot light, a search light, 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 material, the diffuser assembly, and the optics. Instead of the terms “lighting device” or “lighting system”, and similar terms, also the terms “light generating device” or “light generating system”, (and similar terms), may be applied. A lighting device or a lighting system may be configured to generate device light (or “lighting device light”) or system light (“or lighting system light”). As indicated above, the terms light and radiation may interchangeably be used. The lighting device may comprise a light source. The device light may in embodiments comprise one or more of light source light and converted light source light (such as luminescent material light). The lighting system may comprise a light source. The system light may in embodiments comprise one or more of light source light and converted light source light (such as luminescent material light). The term “centroid wavelength”, also indicated as λc, is known in the art, and refers to the wavelength value where half of the light energy is at shorter and half the energy is at longer wavelengths; the value is stated in nanometers (nm). It is the wavelength that divides the integral of a spectral power distribution into two equal parts as expressed by the formula λc = Σ λ*I(λ) / (Σ I( λ)), where the summation is over the wavelength range of interest, and I(λ) is the spectral energy density (i.e. the integration of the product of the wavelength and the intensity over the emission band normalized to the integrated intensity). The centroid wavelength may e.g. be determined at operation conditions. 2024PF80055 68 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: Figs.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 Figs.1 schematically depict basic embodiments of the light generating system 1000 comprising a first light generating device 110, a second light generating device 120, athird light generating device 130, a luminescent material 200, a control system 300, optics500, a polarization control system 600, a first diffuser assembly 1700, a second diffuser assembly 2700, and a light exit 1090. In embodiments, the first light generating device 110 may be configured to provide first device light 111 having a first centroid wavelength (λc1) selected from the wavelength range of 430-490 nm. Therefore, in embodiments, the first light generating device 110 may comprise a first solid state light source 10. In specific embodiments, the first light generating device 110 may comprise a first laser bank comprising a plurality of first lasers. Similarly, in embodiments, the second light generating device 120 may be configured to provide second device light 121 having a second centroid wavelength (λc2) selected from the wavelength range of 430-490 nm. Therefore, in embodiments, the second light generating device 120 may comprise a second solid state light source 20. In specific embodiments, the second light generating device 120 may comprise a second laser bank comprising a plurality of second lasers. Moreover, in embodiments, the third light generating device 130 may be configured to provide third device light 131 having a third centroid wavelength (λc3) selected from the wavelength range of 590-780 nm. Therefore, in embodiments, the third light generating device 130 may comprise a third solid state light source 30. In specific embodiments, the third light generating device 130 may comprise a third laser bank comprising a plurality of third lasers. In embodiments, the first, second, and third solid state light sources 10,20,30 may be individually selected from the group comprising laser diodes, superluminescent diodes, and stacked multi-junction light-emitting diodes. 2024PF80055 69 Moreover, in embodiments, in the first operational mode of the light generating system 1000 the first light generating device 110 and the second light generating device 120 may be operated at a constant drive current and the third light generating device 130 may be operated at an adjustable drive current. Furthermore, in embodiments, the control system 300 may be configured to control the adjustable drive current supplied to the third light generating device 130. Furthermore, in embodiments, the polarization control system 600 may be configured to provide an adjustable intensity contribution of the second device light 121 comprising the second linear polarization and second device light 121 comprising the first linear polarization to the first redirection optical element 510. Especially, such an adjustable intensity contribution may result in an adjustable intensity contribution of (blue) device light 101 being provided to the luminescent material 200 and (blue) device light 101 being provided to the first diffuser assembly 1700. The polarization control system 600 may, in embodiments, comprise a first retarder element 610 configured downstream of (at least) the second light generating device 120 and upstream of the first redirection optical element 510. In embodiments, the control system 300 may be configured to control rotation of the first retarder element 610. Especially, the first retarder element 610 may comprise a λ / 2 waveplate. Additionally or alternatively, in embodiments, the polarization control system 600 may comprise a movement element 620 configured to rotate (at least) the second light generating device 120 (about its optical axis O2). Further, in embodiments, the control system 300 may be configured to control the movement element 620. Yet additionally or alternatively, in embodiments, the polarization control system 600 may comprise an additional retarder element 630 (see e.g. Fig.3) configured downstream of the first redirection optical element 510 and upstream of the first diffuser assembly 1700. Moreover, in embodiments, the control system 300 may optionally be configured to control rotation of the additional retarder element 630. Such an additional retarder element 630 may, in embodiments, be fixated suchthat it may rotate the polarization plane of a second part of the second device light 121b (seealso further below) received by the additional retarder element 630. Especially, the additional retarder element 630 may comprise a λ / 2 waveplate. Therefore, the additional retarder element 630 may especially be fixated such that it may rotate the polarization plane of the second part of the second device light 121b (received by the additional retarder element 630) by (about) 90°. 2024PF80055 70 Especially, the polarization control system 600 may be configured to control the polarization of one or more of the first device light 111 and the second device light 121 reaching the first redirection optical element 510. In embodiments, the luminescent material 200 may be configured to convert at least part of first device light 111 and at least part of second device light 121 received by the luminescent material 200 into luminescent material light 201. Especially, the luminescent material light 201 may have a luminescent material centroid wavelength (λlmc) selected from the range of 500-600 nm. In further embodiments, |λc3-λlmc| ≥ 10 nm. Moreover, in embodiments, 10 nm ≤ |λc1-λc2| ≤ 40 nm. Yet further, in embodiments, the first diffuser assembly 1700 may comprise a first diffuser 1710 configured to diffuse at least part of second device light 121 received by the first diffuser assembly 1710 into diffused second device light 721. Similarly, in embodiments, the second diffuser assembly 2700 may comprise a second diffuser 2710 configured to diffuse at least part of third device light 131 received by the second diffuser assembly 2710 into diffused third device light 731. Furthermore, in embodiments, the optics 500 may comprise a first redirection optical element 510 and one or more further redirection optical elements 505. Especially, thefirst redirection optical element 510 may be configured downstream of both the first lightgenerating device 110 and the second light generating device 120. Moreover, in embodiments, the first redirection optical element 510 may comprise a polarizing beam splitter (PBS1). Especially, the first device light 111 reaching the first redirection optical element 510 may comprise a first linear polarization. In further embodiments, the second device light 121 reaching the first redirection optical element 510 may comprise a second linear polarization, different from the first linear polarization. In embodiments, the first redirection optical element 510 may be configured to combine first device light 111 received by the first redirection optical element 510 and a first part of second device light 121a, (that first part) comprising the second linear polarization, received by the first redirection optical element 510 into a first optical path 1100 to one or more of the one or more further redirection optical elements 505. Moreover, in embodiments, the first redirection optical element 510 may be configured to direct a second part of the second device light 121b, (that second part) comprising a first linear polarization, received by the first redirection optical element 510 into a second optical path 1200, different from the first optical path 1100, to the first diffuser assembly 1700. 2024PF80055 71 Further, in embodiments, the one or more further redirection optical elements 505 may comprise a second redirection optical element 520. In embodiments, the second redirection optical element 520 may comprise a dichroic beam combiner (DBC1). Especially, in embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may comprise at least one cut-off wavelength. The second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may, in embodiments, comprise one or more of a first cut-off wavelength (λco1), a second cut-off wavelength (λco2), and a third cut-off wavelength (λco3). In a first line of embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to transmit light having a wavelength below the first cut-off wavelength (λco1) and reflect light having awavelength above the first cut-off wavelength (λco1), wherein λc2 + 5 nm < λco1 < λlmc - 10nm. Alternatively, in a second line of embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to reflect light having a wavelength below a first cut-off wavelength (λco1) and transmit light having a wavelengthabove the first cut-off wavelength (λco1), wherein λc2 + 5 nm < λco1 < λlmc - 10 nm. Yetalternatively, in a third line of embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to transmit light having a wavelength below a second cut-off wavelength (λco2) and reflect light having a wavelengthabove the second cut-off wavelength (λco2), wherein λlmc + 10 nm < λco2 < λc3 - 5 nm. Yetalternatively, in a fourth line of embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to reflect light having a wavelength below a second cut-off wavelength (λco2) and transmit light having a wavelength above thesecond cut-off wavelength (λco2), wherein λlmc + 10 nm < λco2 < λc3 - 5 nm. Yet alternatively,in a fifth line of embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to transmit light having a wavelength below a first cut-off wavelength (λco1) and above a second cut-off wavelength (λco2) and reflect light having a wavelength between the first cut-off wavelength (λco1) and the second cut-offwavelength (λco2), wherein λc2 + 5 nm < λco1 < λlmc - 10 nm and λlmc + 10 nm < λco2 < λc3 - 5nm. Yet alternatively, in a sixth line of embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to reflect light having a wavelength below a first cut-off wavelength (λco1) and above a second cut-off wavelength (λco2) and transmit light having a wavelength between the first cut-off wavelength (λco1) andthe second cut-off wavelength (λco2), wherein λc2 + 5 nm < λco1 < λlmc - 10 nm and λlmc + 10nm < λco2 < λc3 - 5 nm. Yet alternatively, in a seventh line of embodiments, the second 2024PF80055 72 redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to transmit light having a wavelength below a second cut-off wavelength (λco2) and above a third cut-off wavelength (λco3) and reflect light having a wavelength between the second cut- off wavelength (λco2) and the third cut-off wavelength (λco3), wherein λlmc + 10 nm < λco2 <λc3 - 5 nm and λco3 > λc3 + 5 nm. Yet alternatively, in an eight line of embodiments, thesecond redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to reflect light having a wavelength below a second cut-off wavelength (λco2) and above a third cut-off wavelength (λco3) and transmit light having a wavelength between the second cut-off wavelength (λco2) and the third cut-off wavelength (λco3), wherein λlmc+ 10 nm< λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm. Yet alternatively, in a ninth line of embodiments,the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to transmit light having a wavelength below a first cut-off wavelength (λco1) and between a second cut-off wavelength (λco2) and a third cut-off wavelength and reflect light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2) and above the third cut-off wavelength (λco3), wherein λc2+ 5 nm < λco1<λlmc - 10 nm, λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm. Yet alternatively, in atenth line of embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to reflect light having a wavelength below a first cut- off wavelength (λco1) and between a second cut-off wavelength (λco2) and a third cut-off wavelength (λco3) and transmit light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2) and above the third cut-off wavelength (λco3),wherein λc2 + 5 nm < λco1 < λlmc - 10 nm, λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5nm. Moreover, in embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to (i) transmit two of (at least a substantial part of) the luminescent material light 201, the diffused second device light 721, and the diffused third device light 731 received by the second redirection optical element 520to the light exit 1090 and (ii) reflect the other one of (at least a substantial part of) theluminescent material light 201, the diffused second device light 721, and the diffused third device light 731 received by the second redirection optical element 520 to the light exit 1090. Such embodiments are e.g. depicted in Fig.1A-C and 3 (i.e. transmit the luminescent material light 201 and the diffused third device light 731, and reflect the diffused second device light 721), and Fig.2 and 5 (i.e. transmit the diffused second device light 721 and the diffused third device light 731, and reflect the luminescent material light 201). 2024PF80055 73 In alternative embodiments, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to (i) reflect two of the luminescentmaterial light 201, the diffused second device light 721, and the diffused third device light731 received by the second redirection optical element 520 to the light exit 1090 and (ii) transmit the other one of the luminescent material light 201, the diffused second device light 721, and the diffused third device light 731 received by the second redirection optical element 520 to the light exit 1090. Such embodiments are e.g. depicted in Fig.4 (i.e. reflect the luminescent material light 201 and the diffused second device light 721, and transmit the diffused third device light 731). In further embodiments, the second redirection optical element 520 may further comprise a polarizing beam redirector 525 (also referred to as a polarizing beam splitter (PBS2)) configured to separate the second device light 121 from the diffused seconddevice light 721 by transmitting or reflecting the second device light 121 received by thesecond redirection optical element 520 and the diffused second device light 721 received by the second redirection optical element 520 in dependence of their respective polarizations. Such embodiments are e.g. depicted in Fig.4. Yet further, in embodiments, the one or more further redirection optical elements 505 may be selected from the group comprising a dichroic beam redirector 515, a polarizing beam redirector 525, a neutral beam redirector (not depicted), and a geometric beam redirector (not depicted). In embodiments, a dichroic beam redirector 515 may be configured to transmit or reflect light received by the dichroic beam redirector 515 in dependence of its spectral power distribution. Moreover, in embodiments, a (partially) polarizing beam redirector 525 may be configured to transmit or reflect light received by the polarizing beam redirector 525 in dependence of its (linear) polarization. Moreover, in embodiments, the optics 500 (comprising the one or more further redirection optical elements 505) may be configured to direct first device light 111 and the first part of the second device light 121a to the luminescent material 200. Especially, as depicted here, in embodiments, the first redirection optical element 510 may be configured to direct first device light 111 and the first part of the second device light 121a to the luminescent material 200 via a dichroic beam redirector 515. On the other hand, the optics 500 (comprising the one or more further redirection optical elements 505) may further be configured to direct the second part of the second device light 121b to the first diffuser assembly 1700. Especially, as depicted here, in embodiments, the first redirection optical 2024PF80055 74 element 510 may be configured to direct the second part of the second device light 121b to the first diffuser assembly 1700. Additionally, in embodiments, the optics 500 (comprising the one or more further redirection optical elements 505) may further be configured to direct third device light 131 to the second diffuser assembly 2700. Furthermore, in embodiments, the third light generating device 130 and the optics 500 may be configured such that the third device light 131 received by the second diffuser assembly 2700 may comprise linear polarized light. Yet additionally, in embodiments, the optics 500 (comprising the one or more further redirection optical elements 505) may further be configured to direct (in the first operational mode of the light generating system 1000) the luminescent material light 201, the diffused second device light 721 and the diffused third device light 731 to the light exit 1090. Especially, in embodiments, the light generating system 1000 may be configured to generate in a first operational mode of the light generating system 1000 white system light 1001 comprising at least part of the luminescent material light 201, at least part of the diffused second device light 721, and at least part of the diffused third device light 731. In embodiments, the light generating system 1000 may further comprise a control system 300. The control system 300 may especially be configured to control one or more of a spectral power distribution, a correlated color temperature, a color gamut, and a color rendering index of the system light 1001 (e.g.) by controlling the polarization control system 600. Moreover, in embodiments, the light generating system 1000 may comprise a rotating element 1250, such as e.g. a rotating disc, a phosphor wheel (such as depicted in Fig. 2), or a phosphor rod. Especially, in embodiments, one or more of the luminescent material 200, the first diffuser 1710, and the second diffuser 2710 may be configured on the rotating element 1250. However, in embodiments, one or more of the luminescent material 200, the first diffuser 1710, and the second diffuser 2710 may (also) be configured in a static mode (or configuration). Yet further, in embodiments, one or more of the luminescent material 200, the first diffuser 1710, and the second diffuser 2710 may be configured on a thermally conductive element 900, such as a heat sink or a heat spreader. In embodiments, the light generating system 1000 may further comprise one or more of condensing and / or collimating optics 560, and integrating optics 570. Especially, condensing and / or collimating optics 560 may be configured at one or more positions selected from: (i) in an optical path between at least one of the one or more further redirection optical elements 505 and the luminescent material 200, (ii) in an optical path 2024PF80055 75 between at least one of the one or more further redirection optical elements 505 and the first diffuser 1710, (iii) between the optics 500 and the second diffuser 2710, and (iv) upstream of the light exit 1090 and downstream of at least one of the one or more further redirection optical elements 505. Further, in embodiments, integrating optics 570 may be configured at one or more positions selected from: (i) in an optical path between the first redirection optical element 510 and the first diffuser assembly 1700, (ii) in an optical path between the first redirection optical element 510 and at least one of the one or more further redirection optical elements 505, (iii) in an optical path between the third light generating device 130 and the second diffuser assembly 2700, (iv) and upstream of the light exit 1090 and downstream of the one or more further redirection optical elements 505. Alternatively, in embodiments, integrating optics 570 may be configured upstream of the redirection optical elements 510,520,505 and downstream of any light generating device (such as upstream of the first redirection optical element 510 and downstream of the first light generating device 110, as well as upstream of the first redirection optical element 510 and downstream of the second light generating device 120). Fig 1A schematically depicts an embodiment of the light generating system 1000, where the device light 101,111,121 from the first light generating device 110 and the second light generating device 120 may be redistributed over a luminescent material channel and a diffusion channel via the first redirection optical element 510 (i.e. a first polarizing beam splitter (PBS1)). Small-angle diffusion or integration via an optical integrator 570 may be applied in both channels to prevent hot spots downstream of the first redirection optical element 510 in the respective light beams. The second part of the second device light 101,121b (i.e., comprising the first linear polarization, here especially p-polarized light) may be fed into the second optical path 1200 to the first diffuser assembly 1700, while a mix of first device light 101,111 and the first part of the second device light 101,121a (i.e. comprising a mix of p-polarized and s-polarized light) may be fed into the first optical path 1100 to the luminescent material 200. The device light 101,111,121a injected from the first redirection optical element 510 to the first optical path 1100 may be projected via a (second) dichroic beam splitter 515 (DBS2) onto the (reflective) luminescent material 200. The luminescent material light 201 may be separated from the optical path of incoming device light 101,111,121a by the (second) dichroic beam splitter 515 (DBS2). The light injected from the first redirection optical element 510 to the first optical path 1100 may be projected, via a (second) polarizing beam splitter 525 (PBS2) and a first polarization converter 1720 onto a first (reflective) diffuser 1710. The reflectively diffused (second) device light 721 may 2024PF80055 76 be combined with the luminescent material light 201 and with (reflectively) diffused third device light 731 via the (second) polarizing beam splitter 525 (PBS2). The third device light 131 from the third light generating device 130, typically emitting in the red spectral range, may be projected via a (third) polarizing beam splitter 525 (PBS3) onto a second (reflective) diffuser 2710. The (reflectively) diffused third device light 731 may be combined with the luminescent material light 210 via the (third) polarizing beam splitter 525 (PBS3). Note that, in this configuration, the (second) polarizing beam splitter 525 PBS2 may act as a true polarizing beam splitter for the second device light 121, while transmitting substantially all incident luminescent material light 201 and (diffused) third device light 131,731. The (third) polarizing beam splitter 525 PBS3, however, may interact only with the (diffused) third device light 131,731 and therefore may only need to provide the PBS functionality for the spectral width of that light source without any further spectral requirements. As depicted here in Fig.1A, in embodiments, the first diffuser 1710 may be configured in the reflective mode. Especially, the first diffuser assembly 1700 may be configured such that an optical axis of the second device light 121 reaching the first diffuser 1710 and an optical axis of the diffused second device light 721 reflecting from the first diffuser 1710 may be co-axial. In further embodiments, the first diffuser assembly 1700 may comprise a first polarization converter 1720 configured in an optical path between the first diffuser 1710 and at least one of the one or more further redirection optical elements 505 (here especially the second redirection optical element 520). Moreover, in embodiments, the first polarization converter 1720 may be configured to convert (i) second device light 121 comprising the first linear polarization into second device light 121 comprising an elliptical polarization, and (ii) diffused second device light 721 comprising an elliptical polarization into diffused second device light 721 comprising a second linear polarization. Furthermore, in embodiments, as depicted here in Fig.1A, the second diffuser 2710 may also be configured in the reflective mode. Especially, in embodiments, the second diffuser assembly 2700 may be configured such that an optical axis of the third device light 131 reaching the second diffuser 2710 and an optical axis of the diffused third device light 731 reflecting from the second diffuser 2710 may be co-axial. In further embodiments, the second diffuser assembly 2700 may comprise a second polarization converter 2720 configured in an optical path between the second diffuser 2710 and at least one of the one or more further redirection optical elements 505 (here especially the (third) polarizing beam splitter 525 (PBS3)). Further, in embodiments, the second polarization converter 2720 may be configured to convert (i) third device light 131 comprising a linear polarization into third 2024PF80055 77 device light 131 comprising an elliptical polarization, and (ii) diffused third device light 731 comprising an elliptical polarization into diffused third device light 731 comprising a linearpolarization different from the linear polarization of the third device light 131 propagating (inthe first operational mode) to the second polarization converter 2720. In the embodiment depicted in Fig.1A, the second redirection optical element 520 may comprise a combined dichroic beam combining and polarizing beam splitting functionality (i.e. a combined optical element comprising DBC1&PBS2). In other words, in such embodiments, the second redirection optical element 520 may comprise a polarizing beam splitter PBS2 with additional spectral requirements (here referred to as DBC1). Especially, in embodiments, for the dichroic beam combining DBC1 functionality a cut-off wavelength may (here) be defined for s-polarized light, while for p-polarized light there is no spectral restriction. Fig.1B schematically depicts an embodiment of the light generating system 1000, where the functionality may be very similar to the embodiment of Fig.1A, but redirection of the (reflectively) diffused second device light 721 may be realized via a pure polarizing beam splitter 525 (here depicted as a (second) polarizing beam splitter (PBS2)), while the combination of this redirected (reflectively) diffused device light 721 with the luminescent material light 201 and the (reflectively) diffused third device light 731 may be realized via a separate additional dichroic beam combiner (here especially the second beam combiner 520 (DBC1). Hence, in the embodiment depicted in Fig.1B, the second redirection optical element 520 may comprise only a dichroic beam combining functionality (i.e. DBC1), whereas the light generating system 1000 may comprise a separate (second) polarizing beam splitter 525 (PBS2). Fig.1C schematically depicts an embodiment of the light generating system 1000, where no additional polarizing beam splitters (apart from the first redirection optical element 510) may be required. As depicted, such embodiments may make use of non- collinear reflective diffuser assemblies. Hence, in embodiments, the first diffuser 1710 may be configured in the reflective mode. Especially, in embodiments, the first diffuser assembly 1700 may be configured such that an optical axis of the second device light 121 reaching the first diffuser 1710 and an optical axis of the diffused second device light 721 reflecting from the first diffuser 1710 may not be co-axial. In such embodiments, an optical axis Oi of incoming device light 101 and an optical axis Or of outgoing diffused device light 721,731 (relative to the diffuser 1710,2710) may have a mutual angle β. In such embodiments, the 2024PF80055 78 mutual angle β may be selected from the range of 80°≤β≤140°. Furthermore, the first diffuser assembly 1700 may comprise (i) a first condenser optical element 1734 configured in anoptical path between the first redirection optical element 510 and the first diffuser 1710 and(ii) a first collecting optical element 1735 configured in an optical path between the first diffuser 1710 and the one or more further redirection optical elements 505 (here especially the second redirection optical element 520). Similarly, in embodiments, the second diffuser 2710 may be configured in the reflective mode. Especially, the second diffuser assembly 2700 may be configured such that an optical axis of the third device light 131 reaching the second diffuser 2710 and an optical axis of the diffused third device light 731 reflecting from the second diffuser 2710 may not be co-axial. Further, in embodiments, the second diffuser assembly 2700 may comprise (i) a second condenser optical element 2734 configured in an optical path between the third light generating device 130 and the second diffuser 2710 and (ii) a second collecting optical element 2735 configured in an optical path between the second diffuser 2710 and the one or more further redirection optical elements 505 (here especially the (second) dichroic beam splitter 515 (DBS2)). Fig.2 schematically depicts an embodiment of the light generating system 1000, where the rotating element 1250 may comprise a phosphor wheel. Furthermore, as depicted in Fig.2, the second part of the second device light 121b may be provided to the (reflective collinear) first diffuser assembly 1700 via (i) the first redirection optical element 510, (ii) a combined dichroic beam splitter 515 (DBS2) and polarizing beam splitter 525 (PBS3) component, and the (second) polarizing beam splitter 525 (PBS2). In embodiments asdepicted here, the (second) polarizing beam splitter 525 (PBS2) may further be configured toprovide the third device light 131 to the second diffuser assembly 2700. Additionally, in such embodiments, the (second) polarizing beam splitter 525 (PBS2) may be configured to separate the diffused (second and third) device light 721,731 from the (second and third) device light 121b,131. The (second) polarizing beam splitter 525 (PBS2) may therefore, in embodiments, be configured to provide beam splitting functionality for both light having the second centroid wavelength (λc2) and light having the third centroid wavelength (λc3). Moreover, in embodiments as depicted in Fig.2, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to (i) transmit the diffused second device light 721 and the diffused third device light 731 received by the second redirection optical element 520 to the light exit 1090 and (ii) reflect the luminescent 2024PF80055 79 material light 201 received by the second redirection optical element 520 to the light exit 1090. Fig.3 schematically depicts an embodiment of the light generating system 1000, where conversely to Fig.2, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to (i) transmit the luminescent material light 201 and the diffused third device light 731 received by the second redirection optical element 520 to the light exit 1090 and (ii) reflect the diffused second device light 721 received by the second redirection optical element 520 to the light exit 1090. Furthermore, the light generating system 1000 as depicted in Fig.3 may comprise the additional retarder element 630 configured in an optical path between the first redirection optical element 510 and the second redirection optical element 520. Reference 580 may especially refer to a reflector. Fig.4 schematically depicts an embodiment of the light generating system 1000, where conversely to Figs.2 and 3, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to (i) transmit the diffused third device light 731 received by the second redirection optical element 520 to the light exit 1090 and (ii) reflect the luminescent material light 201 and the diffused second device light 721 received by the second redirection optical element 520 to the light exit 1090. Fig.5 schematically depicts an embodiment of the light generating system 1000, where conversely to Figs.2-4, the second redirection optical element 520 (i.e. the dichroic beam combiner (DBC1)) may be configured to (i) transmit the diffused second device light 721 and the diffused third device light 731 received by the second redirection optical element 520 to the light exit 1090 and (ii) reflect the luminescent material light 201 received by the second redirection optical element 520 to the light exit 1090. In the depicted embodiments, the luminescent material 200, the first diffuser 1710 and the second diffuser 2710 are all configured in the reflective mode. However, in further embodiments, (one or more of) the luminescent material 200, the first diffuser 1710 and the second diffuser 2710 may alternatively be configured in the transmissive mode. 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 2024PF80055 80 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, 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 “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” andsimilar phrases may relate to one or more of item 1 and item 2. The term "comprising" mayin 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". 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. 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. 2024PF80055 81 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. 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 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 or more of the characterizing features described in the description and / or shown in the attached drawings. 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

2024PF80055 82 CLAIMS:

1. A light generating system (1000) comprising a first light generating device(110), a second light generating device (120), a third light generating device (130), a luminescent material (200), a control system (300), optics (500), a polarization control system (600), a first diffuser assembly (1700), a second diffuser assembly (2700), and a light exit (1090); wherein:- the first light generating device (110) is configured to provide first device light(111) having a first centroid wavelength (λc1) selected from the wavelength range of 430-490 nm, wherein the first light generating device (110) comprises a first solid state light source (10);- the second light generating device (120) is configured to provide seconddevice light (121) having a second centroid wavelength (λc2) selected from the wavelength range of 430-490 nm, wherein the second light generating device (120) comprises a second solid state light source (20);- the third light generating device (130) is configured to provide third devicelight (131) having a third centroid wavelength (λc3) selected from the wavelength range of 590-780 nm, wherein the third light generating device (130) comprises a third solid state light source (30);- the first, second, and third solid state light sources (10,20,30) are individuallyselected from the group comprising laser diodes, superluminescent diodes, and stacked multi- junction light-emitting diodes;- the luminescent material (200) is configured to convert at least part of firstdevice light (111) and at least part of second device light (121) received by the luminescent material (200) into luminescent material light (201);- the first diffuser assembly (1700) comprises a first diffuser (1710) configuredto diffuse at least part of second device light (121) received by the first diffuser assembly (1710) into diffused second device light (721);- the second diffuser assembly (2700) comprises a second diffuser (2710)configured to diffuse at least part of third device light (131) received by the second diffuser2024PF80055 83 assembly (2710) into diffused third device light (731), wherein the second diffuser (2710) is configured in the reflective mode;- the optics (500) comprise a first redirection optical element (510) and one ormore further redirection optical elements (505); wherein the first redirection optical element(510) is configured downstream of both the first light generating device (110) and the secondlight generating device (120); wherein the first redirection optical element (510) comprises a polarizing beam splitter (PBS1); wherein the first device light (111) reaching the first redirection optical element (510) comprises a first linear polarization and wherein the second device light (121) reaching the first redirection optical element (510) comprises a second linear polarization, different from the first linear polarization; wherein the first redirection optical element (510) is configured to combine first device light (111) received by the first redirection optical element (510) and a first part of second device light (121a), comprising the second linear polarization, received by the first redirection optical element (510) into a first optical path (1100) to one or more of the one or more further redirection optical elements (505); wherein the first redirection optical element (510) is configured to direct a second part of the second device light (121b), comprising a first linear polarization, received by the first redirection optical element (510) into an second optical path (1200), different from the first optical path (1100), to the first diffuser assembly (1700);- the optics (500) comprising the one or more further redirection opticalelements (505) are further configured to one or more of: (i) direct first device light (111) and the first part of the second device light (121a) to the luminescent material (200), (ii) direct the second part of the second device light (121b) to the first diffuser assembly (1700), (iii) direct third device light (131) to the second diffuser assembly (2700), wherein the third light generating device (130) and the optics (500) are configured such that the third device light (131) received by the second diffuser assembly (2700) comprises linear polarized light, and (iv) direct the luminescent material light (201), the diffused second device light (721) and the diffused third device light (731) to the light exit (1090);- the polarization control system (600) is configured to control the polarizationof one or more of the first device light (111) and the second device light (121) reaching the first redirection optical element (510);- the light generating system (1000) is configured to generate in a firstoperational mode of the light generating system (1000) white system light (1001) comprising at least part of the luminescent material light (201), at least part of the diffused second device light (721), and at least part of the diffused third device light (731);2024PF80055 84- the control system (300) is configured to control one or more of a spectralpower distribution, a correlated color temperature, a color gamut, and a color rendering index of the system light (1001) by controlling the polarization control system (600); and- in an operational mode of the light generating system (1000) the system light(1001) is white light having a correlated color temperature selected from the range of 2000- 10000 K and a color rendering index of at least 65.

2. The light generating system (1000) according to claim 1, wherein in the firstoperational mode of the light generating system (1000) the first light generating device (110) and the second light generating device (120) are operated at a constant drive current and the third light generating device (130) is operated at an adjustable drive current, wherein the control system (300) is configured to control the adjustable drive current supplied to the third light generating device (130).

3. The light generating system according to any one of the preceding claims,wherein in the first operational mode the first light generating device (110) and the second light generating device (120) are operated at their respective rated forward currents, rated maximum forward currents, or currents in between these former two.

4. The light generating system according to any one of the preceding claims,wherein the polarization control system (600) is configured to provide an adjustable intensity contribution of the second device light (121) comprising the second linear polarization andsecond device light (121) comprising the first linear polarization to the first redirectionoptical element (510).

5. The light generating system (1000) according to any one of the precedingclaims, wherein the polarization control system (600) comprises one or more of:- a first retarder element (610) configured downstream of the second lightgenerating device (120) and upstream of the first redirection optical element (510), whereinthe control system (300) is configured to control rotation of the first retarder element (610);and wherein the first retarder element (610) comprises a λ / 2 waveplate; and- a movement element (620) configured to rotate the second light generatingdevice (120), wherein the control system (300) is configured to control the movement element (620).2024PF80055 856. The light generating system (1000) according to any one of the precedingclaims, wherein the first light generating device (110) comprises a first laser bank comprisinga plurality of first lasers (10), the second light generating device (120) comprises a secondlaser bank comprising a plurality of second lasers (20), and the third light generating device (130) comprises a third laser bank comprising a plurality of third lasers (30); wherein 10 nm ≤ |λc1-λc2| ≤ 40 nm.

7. The light generating system (1000) according to any one of the precedingclaims, wherein one or more of the following applies:- the first diffuser (1710) is configured in the reflective mode, wherein the firstdiffuser assembly (1700) is configured such that an optical axis of the second device light (121) reaching the first diffuser (1710) and an optical axis of the diffused second device light (721) reflecting from the first diffuser (1710) are co-axial; wherein the first diffuser assembly (1700) comprises a first polarization converter (1720) configured in an optical path between the first diffuser (1710) and at least one of the one or more further redirection optical elements (505); wherein the first polarization converter (1720) is configured to convert (i) second device light (121) comprising the first linear polarization into second device light (121) comprising an elliptical polarization, and (ii) diffused second device light (721) comprising an elliptical polarization into diffused second device light (721) comprising a second linear polarization;- the second diffuser (2710) is configured in the reflective mode, wherein thesecond diffuser assembly (2700) is configured such that an optical axis of the third device light (131) reaching the second diffuser (2710) and an optical axis of the diffused third device light (731) reflecting from the second diffuser (2710) are co-axial; wherein the second diffuser assembly (2700) comprises a second polarization converter (2720) configured in an optical path between the second diffuser (2710) and at least one of the one or more further redirection optical elements (505), wherein the second polarization converter (2720) is configured to convert (i) third device light (131) comprising a linear polarization into third device light (131) comprising an elliptical polarization, and (ii) diffused third device light (731) comprising an elliptical polarization into diffused third device light (731) comprising a linear polarization different from the linear polarization of the third device light (131) propagating to the second polarization converter (2720);2024PF80055 86- the first diffuser (1710) is configured in the reflective mode, wherein the firstdiffuser assembly (1700) is configured such that an optical axis of the second device light (121) reaching the first diffuser (1710) and an optical axis of the diffused second device light (721) reflecting from the first diffuser (1710) are not co-axial; wherein the first diffuser assembly (1700) comprises (i) a first condenser optical element (1734) configured in an optical path between the first redirection optical element (510) and the first diffuser (1710) and (ii) a first collecting optical element (1735) configured in an optical path between the first diffuser (1710) and the one or more further redirection optical elements (505); and- the second diffuser (2710) is configured in the reflective mode, wherein thesecond diffuser assembly (2700) is configured such that an optical axis of the third device light (131) reaching the second diffuser (2710) and an optical axis of the diffused third device light (731) reflecting from the second diffuser (2710) are not co-axial; wherein the second diffuser assembly (2700) comprises (i) a second condenser optical element (2734) configured in an optical path between the third light generating device (130) and the second diffuser (2710) and (ii) a second collecting optical element (2735) configured in an optical path between the second diffuser (2710) and the one or more further redirection optical elements (505).

8. The light generating system (1000) according to any one of the precedingclaims, wherein the luminescent material light (201) has a luminescent material centroid wavelength (λlmc) selected from the range of 500-600 nm, wherein |λc3-λlmc| ≥ 10 nm; wherein the one or more further redirection optical elements (505) comprise a second redirection optical element (520), wherein the second redirection optical element (520) comprises a dichroic beam combiner (DBC1), wherein the dichroic beam combiner (DBC1) comprises at least one cut-off wavelength, wherein the dichroic beam combiner (DBC1) is configured to one of:- (i) transmit light having a wavelength below a first cut-off wavelength (λco1)and reflect light having a wavelength above the first cut-off wavelength (λco1), wherein λc2+5 nm < λco1 < λlmc - 10 nm;- (ii) reflect light having a wavelength below a first cut-off wavelength (λco1)and transmit light having a wavelength above the first cut-off wavelength (λco1), wherein λc2+ 5 nm < λco1 < λlmc - 10 nm;2024PF80055 87- (iii) transmit light having a wavelength below a second cut-off wavelength(λco2) and reflect light having a wavelength above the second cut-off wavelength (λco2),wherein λlmc + 10 nm < λco2 < λc3 - 5 nm;- (iv) reflect light having a wavelength below a second cut-off wavelength (λco2)and transmit light having a wavelength above the second cut-off wavelength (λco2), whereinλlmc + 10 nm < λco2 < λc3 - 5 nm;- (v) transmit light having a wavelength below a first cut-off wavelength (λco1)and above a second cut-off wavelength (λco2) and reflect light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2), wherein λc2+ 5nm < λco1 < λlmc - 10 nm and λlmc + 10 nm < λco2 < λc3 - 5 nm;- (vi) reflect light having a wavelength below a first cut-off wavelength (λco1)and above a second cut-off wavelength (λco2) and transmit light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2), wherein λc2 + 5nm < λco1 < λlmc - 10 nm and λlmc + 10 nm < λco2 < λc3 - 5 nm;- (vii) transmit light having a wavelength below a second cut-off wavelength(λco2) and above a third cut-off wavelengthand reflect light having a wavelength between the second cut-off wavelength (λco2) and the third cut-off wavelength (λco3), whereinλlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm;- (viii) reflect light having a wavelength below a second cut-off wavelength(λco2) and above a third cut-off wavelengthand transmit light having a wavelength between the second cut-off wavelength (λco2) and the third cut-off wavelength (λco3), whereinλlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm;- (ix) transmit light having a wavelength below a first cut-off wavelength (λco1)and between a second cut-off wavelength (λco2) a third cut-off wavelengthand reflect light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2) and above the third cut-off wavelength (λco3), wherein λc2 + 5 nm < λco1 <λlmc - 10 nm, λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm; and- (x) reflect light having a wavelength below a first cut-off wavelength (λco1)and between a second cut-off wavelength (λco2) a third cut-off wavelengthand transmit light having a wavelength between the first cut-off wavelength (λco1) and the second cut-off wavelength (λco2) and above the third cut-off wavelength (λco3), wherein λc2+ 5 nm < λco1<λlmc - 10 nm, λlmc + 10 nm < λco2 < λc3 - 5 nm and λco3 > λc3 + 5 nm.2024PF80055 889. The light generating system (1000) according to claim 8, wherein the secondredirection optical element (520) further comprises a polarizing beam splitter (PBS2) configured to separate the second device light (121) from the diffused second device light (721) by transmitting or reflecting the second device light (121) received by the second redirection optical element (520) and the diffused second device light (721) received by the second redirection optical element (520) in dependence of their respective polarizations.

10. The light generating system according to any one of the preceding claims,wherein one or more of the one or more further redirection optical elements (505) are selected from the group comprising:- a dichroic beam redirector (515) configured to transmit or reflect lightreceived by the dichroic beam redirector (515) in dependence of its spectral power distribution;- a polarizing beam redirector (525) configured to transmit or reflect lightreceived by the polarizing beam redirector (525) in dependence of its polarization; and- a geometric beam redirector (535) configured to transmit or reflect lightreceived by the geometric beam redirector (535) in dependence of a position of incidence of the light on the geometric beam redirector (535).

11. The light generating system according to any one of the preceding claims,wherein the light generating system (1000) comprises a rotating element (1250), wherein one or more of the luminescent material (200), the first diffuser (1710), and the second diffuser (2710) are configured on the rotating element (1250).

12. The light generating system according to any one of the preceding claims,wherein the light generating system (1000) further comprises one or more of condensing and / or collimating optics (560), and integrating optics (570), wherein condensing and / or collimating optics (560) are configured at one or more positions selected from: (i) in an optical path between at least one of the one or more further redirection optical elements (505) and the luminescent material (200), (ii) in an optical path between at least one of the one or more further redirection optical elements (505) and the first diffuser (1710), (iii) between the optics (500) and the second diffuser (2710), and (iv) upstream of the light exit (1090) and downstream of at least one of the one or more further redirection optical elements (505); wherein integrating optics (570) are configured at one or more positions selected from: (i) in2024PF80055 89 an optical path between the first redirection optical element (510) and the first diffuser assembly (1700), (ii) in an optical path between the first redirection optical element (510) andat least one of the one or more further redirection optical elements (505), (iii) in an opticalpath between the third light generating device (130) and the second diffuser assembly (2700), (iv) and upstream of the light exit (1090) and downstream of the one or more further redirection optical elements (505).

13. 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) is white light having a correlated color temperature selected from the range of 2000-7000 K.

14. The light generating system according to any one of the preceding claims,wherein the control system (300) is configured to control one or more of the spectral power distribution and the radiant flux of the system light (1001) by controlling the polarization control system (600) and optionally a drive current supplied to the third light generating device (130), such that: (i) in the 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| ≥ 500 K.

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

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