Beam-splitter for improved usage of optical power in a laser-phosphor engine

Abstract

: The invention provides a light generating system (1000) comprising a first light generating device (110), a second light generating device (120), a luminescent material (200), a diffuser assembly (700), optical elements (500) comprising a first redirection optical element (1510), and a light exit (1090), wherein; (A) the first light generating device (110) is configured to generate first device light (111); the second light generating device (120) is 5 configured to generate second device light (121); (B) the luminescent material (200) is configured to convert at least part of the first device light (111) and at least part of the second device light (121) into luminescent material light (201); (C) the diffuser assembly (700) comprises a diffuser (710); wherein the diffuser (710) is configured to diffuse at least part of the first device light (111) and at least part of the second device light (121) into diffused 10 device light (711); (D) the optical elements (500) comprise one or more redirection optical elements (1500), at least comprising the first redirection optical element (1510); wherein the first redirection optical element (1510) is configured in a light-receiving relationship with the first light generating device (110) and the second light generating device (120); wherein the first redirection optical element (1510) is at least partially transmissive for first device light 15 (111) and second device light (121) and at least partially reflective for first device light (111) and second device light (121); wherein the first redirection optical element (1510) is configured to (i) direct in a first operational mode of the light generating system (1000) a first part of device light (101a), comprising at least part of the first device light (111) and at least part of the second device light (121), in an optical path to the luminescent material (200), and 20 to (ii) direct in the first operational mode of the light generating system (1000) a second part of device light (101b), comprising at least another part of the first device light (111) and at least another part of the second device light (121), in an optical path to the diffuser assembly (700); and (E) the light generating system (1000) is configured to generate in the first operational mode of the light generating system (1000) system light (1001) comprising at 25 least part of the luminescent material light (201) and at least part of the diffused device light (711).

Description

[0001]2024PF80129 1 Beam-splitter for improved usage of optical power in a laser-phosphor engine 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 comprising beam splitting optics are known in the art. US2021247678A1, for instance, describes a light source device including a plurality of laser modules and a beam combiner. Each laser module includes a first laser diode configured to emit a first laser beam and a second laser diode configured to emit a second laser beam. The beam combiner has a first dichroic mirror region and a second dichroic mirror region. The first dichroic mirror region is configured to transmit the first laser beam going out from the first laser module, and to reflect the second laser beam going out from the second laser module. The second dichroic mirror region configured to transmit the second laser beam going out from the first laser module, and to reflect the first laser beam going out from the second laser module. CN107272312A discloses a system with a first light source and a second light source, and a light-dividing device for receiving the first light and the second light and that has a different reflectance and transmittance for the first light and the second light. The light- dividing device guides part of the first light and the second light in a first light path and another part of the first light and the second light in a second light path. A wavelength conversion component receives the first light and the second light from the first light path for conversion. A scattering device receives the first light and the second light from the second light path for light scattering. The converted light and the scattered light is combined and exits the system. WO2020 / 255785A discloses a light source device having a light source unit that emits emission light, a wavelength conversion unit that performs wavelength conversion on the emission light and emits luminescent light and a first synthetic optical unit that is disposed between the light source unit and the wavelength conversion unit, which has a reflection part that reflects part of the emission light and one or more transmission parts that 2024PF80129 2 transmit part of the emission light, and is movable in a direction crossing the light axis of the emission light. US2020 / 401026A discloses a light source device having a light emitting device, a first optical element having a first area and a second area, a second optical element converting a first light output from the first area into a second light, a diffuser element into which the second light is entered, and a wavelength conversion element into which the first light output from the second area is entered. The light output from the diffuser element and entered into the second optical element is converted into a third light, the third light output from the second optical element and entered into the first area is output from the first area, the light output from the diffuser element and entered into the second area is output from the second area, and a fourth light is output through the first area and the second area. 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. Such prior art systems may comprise multiple color channels, which are combined at the output to generate a desired color temperature. The input optical power is provided by several laser diodes, which for high brightness sources can be packaged together in a rectangular grid, a so-called laser bank (LB). The laser banks come in a limited number of sizes, characterized by the number of laser diodes in the package. Since the number of lasers is related to the maximum optical output of the laser bank, choosing between these limited options may result in having to drive a laser bank below its optimal output to achieve the desired color point, limiting the flux at the output. Previously, methods have been proposed to combine the light emitted by several laser banks utilizing polarization, where either a polarization rotator or a physical rotation of the laser bank provides a way to create a known splitting ratio between the two polarization components. These polarization components can consequently be separated using a polarizing beam splitter and can be guided towards two orthogonal directions (e.g. into two color channels). However, such methods restrict the possible polarization at the input of the color channels (e.g. S-polarization in one channel and P-polarization in the other), potentially requiring another polarization rotator if a different polarization is desired, therewith further increasing the system complexity and costs. 2024PF80129 3 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 (“system”) comprising a first light generating device, a second light generating device, a luminescent material, a diffuser assembly, optical elements comprising a first redirection optical element, and a light exit. In embodiments, the first light generating device may be configured to generate first device light. Therefore, 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 generate second device light. Therefore, the second light generating device may comprise a second solid-state light source. The first solid state light source and the second solid state light source may, in embodiments, be individually selected from the group comprising laser diodes, superluminescent diodes, and stacked multi- junction light-emitting diodes. The luminescent material may, in embodiments, be configured in a light-receiving relationship (via the optical elements) with the first light generating device and the second light generating device. Especially in embodiments, the luminescent material may be configured to convert at least part of the first device light received by the luminescent material and at least part of the second device light received by the luminescent material into luminescent material light. Similarly, in embodiments, the diffuser assembly may be configured in a light-receiving relationship (via the optical elements) with the first light generating device and the second light generating device. The diffuser assembly may comprise a diffuser. In embodiments, the diffuser may be configured to diffuse at least part of the first device light received by the diffuser and at least part of the second device light received by the diffuser into diffused device light. Further, in embodiments, the optical elements may comprise one or more redirection optical elements. In embodiments, the one or more redirection optical elements may at least comprise the first redirection optical element. The first redirection optical element may, in embodiments, be configured in a light-receiving relationship with (both) the first light generating device and the second light generating device. Especially, in embodiments, the first redirection optical element may be configured to receive first device light and second device light from orthogonal (or at least different) optical paths. In embodiments, the first redirection optical element may be at least partially transmissive for first device light and second device light. Additionally, in embodiments, the first redirection optical element may be at least partially reflective for first device light and 2024PF80129 4 second device light. In such embodiments, the first redirection optical element may especially redirect (i.e. reflect and transmit) the first and second device light independently (or irrespective) of their respective polarization and spectral power distribution. Especially, in embodiments, the first redirection optical element may be configured to direct in a first operational mode of the light generating system a first part of device light, comprising at least part of the first device light and at least part of the second device light, in an optical path to the luminescent material. Additionally, in embodiments, the first redirection optical element may be configured to direct in the first operational mode of the light generating system a second part of device light, comprising at least another part of the first device light and at least another part of the second device light, in an optical path to the diffuser assembly. Yet additionally, in embodiments, the optical elements (e.g. further redirection optical elements) may further configured to direct the luminescent material light and the diffused device light in an optical path to the light exit. In embodiments, the light generating system may thus be configured to generate, in the first operational mode of the light generating system, system light comprising at least part of the luminescent material light and at least part of the diffused device light. Hence, in embodiments, the invention provides a light generating system comprising a first light generating device, a second light generating device, a luminescent material, a diffuser assembly, optical elements comprising a first redirection optical element, and a light exit, wherein; (A) the first light generating device may be configured to generate first device light, wherein the first light generating device may comprise a first solid-state light source; the second light generating device may be configured to generate second device light, wherein the second light generating device may comprise a second solid-state light source; wherein the first solid state light source and the second solid state light source may be individually selected from the group comprising laser diodes, superluminescent diodes, and stacked multi-junction light-emitting diodes; (B) the luminescent material may be configured to convert at least part of the first device light received by the luminescent material and at least part of the second device light received by the luminescent material into luminescent material light; (C) the diffuser assembly may comprise a diffuser; wherein the diffuser may be configured to diffuse at least part of the first device light received by the diffuser and at least part of the second device light received by the diffuser into diffused device light; (D) the optical elements may comprise one or more redirection optical elements, at least comprising the first redirection optical element; wherein the first redirection optical element may be configured in a light-receiving relationship with the first light generating device and the second light generating device; wherein the first redirection optical element may be at least 2024PF80129 5 partially transmissive for first device light and second device light and at least partially reflective for first device light and second device light; wherein the first redirection optical element may be configured to (i) direct in a first operational mode of the light generating system a first part of device light, comprising at least part of the first device light and at least part of the second device light, in an optical path to the luminescent material, and to (ii) direct in the first operational mode of the light generating system a second part of device light, comprising at least another part of the first device light and at least another part of the second device light, in an optical path to the diffuser assembly; the optical elements may further be configured to direct the luminescent material light and the diffused device light in an optical path to the light exit; and (E) the light generating system may be configured to generate, in the first operational mode of the light generating system, system light comprising at least part of the luminescent material light and at least part of the diffused device light. Such a light generating system may alleviate the restriction of the limited range of laser bank sizes, while still driving the laser banks at their maximum output and achieving the desired color point. The system may do so by using a beam splitter with a well- chosen reflectance, such that the optical power produced by two laser sources with unequal optical power may be directed towards the required color channels. The light generating system may further provide the benefit of not requiring a specific polarization (nor expensive polarization optics), thus allowing the same polarization to be guided to two color channels. Hence, without such a requirement of polarization the output light may have more degrees of freedom, while the system may be more cost-efficient. Furthermore, the light generating system may provide a laser-based light source which may be used to produce white light with relatively high brightness. The system may therefore comprise multiple laser diodes, which may be grouped together in laser banks. The light produced by these laser banks may be distributed over two or more color channels. The optical input per channel and the corresponding channel efficiency may determine the optical characteristics at the output (CCT, CRI, flux). Efficiently dividing the optical power produced by the laser banks over the color channels by using the first redirection optical element of the invention may enable tuneability of the system. Especially, first redirection optical element of the invention may allow the system to be used at a desired color point, while driving the laser banks to produce the highest optical power and thus achieving the highest flux out of the source. The reflectance of the first redirection optical element may especially be chosen based on the desired color point, or may be used to bias the system to a color point around which the optical powers can be tuned by other methods (such as e.g. the 2024PF80129 6 addition of further laser sources through dichroic or polarization based multiplexing). Hence, in such embodiments, the light generating system of the invention may comprise a beam splitter with a well-chosen reflectance / transmittance such as to optimally use the available optical power produced by two laser sources. In other words, the invention may provide a beam-splitter for improved usage of optical power in a laser-phosphor engine. The light generating system (or “system”) may thus comprise a first light generating device, a second light generating device, a luminescent element, a diffuser assembly, optical elements comprising a first redirection optical element, 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 devices may each comprise a solid-state light source. The light generating system may especially comprise two or more light generating devices. In embodiments, the two or more light generating devices may comprise (at least) a first light generating device and a second light generating device (and optionally a third (or further) light generating devices). 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). In specific embodiments, the first light generating device may comprise at least two first solid-state light sources, such as e.g. two lasers. The first light generating device may herein also comprise a plurality of first (solid state) light sources. Especially, in specific embodiments, 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 light sources. Especially, in embodiments, the first laser bank may comprise a first array comprising a plurality of first lasers. For example, in embodiments, the first array may comprise a v*w array. In such embodiments, v and w 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. 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 2024PF80129 7 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. In embodiments, the first light generating device may comprise a first laser bank comprising n first lasers. In embodiments, n may be selected from the range of 2-36, especially from the range of 4-28. 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 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 shorter wavelengths 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 blue wavelength range. However, in alternative embodiments, the first device light may be essentially any color. Especially, in embodiments, the first centroid wavelength (λc1) may be selected from the visible wavelength range (380-780 nm). 2024PF80129 8 Yet further, in embodiments, the first light generating device may have a first maximum optical power (P1). Herein, a maximum optical power may especially refer to the maximum energy per unit time that may be provided by the first light generating device (or in other words may be transported by the first device light). Note that, in embodiments, the first light generating device may be configured to operate at its first maximum optical power (P1). However, in other embodiments, the first light generating device may be operated at a (slightly) lower first effective optical power (P1eff). For example, in embodiments, the first light generating device may be configured to operate at a dimmed setting. In embodiments, the first light generating device may be configured to operate at a first effective optical power (P1eff) of at least 70% of the first maximum optical power (P1), such as at least 80%, like at least 90%, especially at least 95%. More especially, in embodiments, the first light generating device may be configured to operate at an effective first optical power (P1eff) of at least 98% of the first maximum optical power (P1), like at least 99%, including 100% of the first maximum optical power (P1). Especially, the first light generating device, in the first operational mode of the light generating system may be operated at an (first effective) optical power (P1eff) selected from the range of 70-100%, like from the range of 75-100%, especially from the range of 85-99% of its respective maximum optical power (P1). Such embodiments may be beneficial as the full potential of a light generating device, such as a laser bank, may be optimally used. As such, the redundant installation of expensive solid state light sources, such as laser diodes, may be reduced or even completely avoided. For example, in embodiments, in an operational mode where the light generating system is set to provide a maximum optical output power (at a certain desired CCT), the first light generating device may e.g. be operated at up to 90% of its respective maximum optical power (P1). Similarly, in embodiments, the second light generating device may 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). In specific embodiments, the second light generating device may comprise at least two second solid state light sources, such as e.g., second lasers. 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 2024PF80129 9 above). In such embodiments, the second laser bank may comprise a second array comprising a plurality of second solid 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 array may comprise a v*w array, as described above in relation to the first laser bank. Especially, in embodiments, the second light generating device may comprise a second laser bank comprising m second lasers. In embodiments, m may be selected from the range of 2-36, especially from the range of 4-28. Further, in embodiments, the first light generating device and the second light generating device may have the same number of lasers, i.e., n=m. However, in specific embodiments, the first light generating device and the second light generating device may have a different number of lasers, i.e., n≠m. For example, in embodiments, n may be 14 (e.g. a first laser bank comprising a 2*7 array) and m may be 28 (e.g. a second laser bank comprising a 4*7 array). 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. However, in alternative embodiments, the second device light may be essentially any color. Especially, in embodiments, the second centroid wavelength (λc2) may be selected from the visible wavelength range (380-780 nm). Further, in embodiments, |λc1-λc2|≤40 nm, such as |λc1- λc2|≤30 nm, like |λc1-λc2|≤20 nm, especially |λc1-λc2|≤10 nm, including λc1=λc2. For example, in embodiments, the first light generating device and the second light generating device may comprise solid state light sources of the same bin. Alternatively, in embodiments, |λc1-λc2|≥40 nm, such as |λc1-λc2|≥50 nm, like |λc1-λc2|≥60 nm, especially |λc1-λc2|≥70 nm. For example, in embodiments, the first light generating device and the second light generating device may comprise solid state light sources of a different bin. Yet further, in embodiments, the second light generating device may have a second maximum optical power (P2). Herein, a maximum optical power may especially refer to the maximum energy per unit time that may be provided by the second light generating device (or in other words may be transported by the second device light). Note that, in embodiments, the second light generating device may be configured to operate at its second 2024PF80129 10 maximum optical power (P2). However, in other embodiments, the second light generating device may be operated at a (slightly) lower second effective optical power (P2eff). For example, in embodiments, the second light generating device may be configured to operate at a dimmed setting. In embodiments, the second light generating device may be configured to operate at a second effective optical power (P2eff) of at least 70% of the second maximum optical power (P2), such as at least 80%, like at least 90%, especially at least 95%. More especially, in embodiments, the second light generating device may be configured to operate at an effective second optical power (P2eff) of at least 98% of the second maximum optical power (P2), like at least 99%, including 100% of the second maximum optical power (P2). Especially, the second light generating device, in the first operational mode of the light generating system may be operated at an (second effective) optical power (P2eff) selected from the range of 70-100%, like from the range of 75-100%, especially from the range of 85- 99% of its respective maximum optical power (P2). Such embodiments may be beneficial as the full potential of a light generating device, such as a laser bank, may be optimally used. As such, the redundant installation of expensive solid state light sources, such as laser diodes, may be reduced or even completely avoided. For example, in embodiments, in an operational mode where the light generating system is set to provide a maximum optical output power (at a certain desired CCT), the second light generating device may e.g. be operated at up to 90% of its respective maximum optical power (P2). In specific embodiments, the light generating system of the invention may be configured such that the first maximum optical power (P1) and the second maximum optical power (P2) may be unequal. Especially, in embodiments, P1 / P2≥1.05, such as P1 / P2≥1.15 (e.g. in case of a first laser bank comprising 28 laser and a second laser bank comprising 24 (of a similar type of) lasers), like P1 / P2≥1.25. More especially, in embodiments, P1 / P2≥1.35, such as P1 / P2≥1.50, like P1 / P2≥1.75. Moreover, in embodiments, P1 / P2≥2, such as P1 / P2≥5, like P1 / P2≥10. Alternatively, in embodiments, P2 / P1≥1.05, such as P2 / P1≥1.15 (e.g. in case of a second laser bank comprising 28 laser and a first laser bank comprising 24 (of a similar type of) lasers), like P2 / P1≥1.25. More especially, in embodiments, P2 / P1≥1.35, such as P2 / P1≥1.50, like P2 / P1≥1.75. Moreover, in embodiments, P2 / P1≥2, such as P2 / P1≥5, like P2 / P1≥10. Yet, in embodiments (e.g. when the first redirection optical element comprises a patched mirror, see also further below), P1=P2. 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, to the optical elements. In embodiments, the optical elements may 2024PF80129 11 comprise one or more 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 optical elements (especially the redirection optical elements) may comprise at least a first redirection optical element. Note that, in embodiments, a redirection optical element may have a beam splitting functionality and / or a beam combining 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 fact that the optical elements may comprise a first redirection optical element does not exclude the presence of other optics, and may also include the use of one or more further redirection optical elements, such as e.g. one or more of a second redirection optical element and a third redirection optical element (see also below). In specific 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, to the first redirection optical element. In such embodiments, the first redirection optical element may thus (during operation) be configured in a light- receiving relationship with both the first light generating device and the second light generating device. The first redirection optical element may thus 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”. Herein, in embodiments, the first redirection optical element, the first light generating device and the second light generating device may be configured such that the first device light and the second device light may be received by the first redirection optical element from orthogonal directions. In other words, in embodiments, the first device light and the second device light may be provided along orthogonal optical paths to the first redirection optical element. However, this may not necessarily be the case. In embodiments, the first device light incident on the first redirection optical element may have a first optical axis and the second device light incident on the first redirection optical element may have a 2024PF80129 12 second optical axis. In such embodiments, the first optical axis and the second optical axis may have a mutual angle selected from the range of 45-115°, such as from the range of 60- 100°, like from the range of 70-90°. 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 first device light incident on the first redirection optical element may be defined as an imaginary line that defines the path along which light propagates (from the first light generating device) to the first redirection optical element. More especially, the optical axis (O) may coincide with the direction of the light with the highest radiant flux. The first redirection optical element may especially be configured at least partially transmissive for the first device light. For instance, in embodiments, the first redirection optical element may comprise a semitransparent mirror. For example, in embodiments, the first redirection optical element may be configured to transmit at least 5% of the first device light received by the first redirection optical element, such as at least 10%, like at least 20%, especially at least 30%. Further, in embodiments, the first redirection optical element may be configured to transmit at most 95% of the first device light received by the first redirection optical element, such as at most 90%, like at most 80%, especially at most 70%. Additionally, in embodiments, the first redirection optical element may be configured at least partially reflective for the first device light. For example, in embodiments, the first redirection optical element may be configured to reflect at least 5% of the first device light received by the first redirection optical element, such as at least 10%, like at least 20%, especially at least 30%. Further, in embodiments, the first redirection optical element may be configured to reflect at most 95% of the first device light received by the first redirection optical element, such as at most 90%, like at most 80%, especially at most 70%. The phrase “... light received by ...”, and similar phrases, such as “device light received by the first redirection optical element” (or “… by the luminescent material”, etc.) may especially indicate that when the light is actually received by the element, 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 element receives light may e.g. depend on e.g. a controlling mode (for instance whether or not a light generating device provides light). Similarly, the first redirection optical element may especially be configured at least partially transmissive for the second device light. For example, in embodiments, the first redirection optical element may be configured to transmit at least 5% of the second device 2024PF80129 13 light received by the first redirection optical element, such as at least 10%, like at least 20%, especially at least 30%. Further, in embodiments, the first redirection optical element may be configured to transmit at most 95% of the second device light received by the first redirection optical element, such as at most 90%, like at most 80%, especially at most 70%. Additionally, in embodiments, the first redirection optical element may be configured at least partially reflective for the second device light. For example, in embodiments, the first redirection optical element may be configured to reflect at least 5% of the second device light received by the first redirection optical element, such as at least 10%, like at least 20%, especially at least 30%. Further, in embodiments, the first redirection optical element may be configured to reflect at most 95% of the second device light received by the first redirection optical element, such as at most 90%, like at most 80%, especially at most 70%. Such partial transmissivity and partial reflectivity relative to the first device light and the second device light may be achieved in a variety of different ways. In such embodiments, the first redirection optical element may have a total reflectance (R) for (first and second) device light. The total reflectance may, in embodiments, be selected from the range of 0-100%. Especially, in embodiments, the total reflectance may be selected from the range of 5-95%, such as from the range of 10-90%, like from the range of 20-80%. Especially, in embodiments where P1 / P2≥1.05, the total reflectance (of the first redirection optical element, i.e., the semitransparent mirror) may be selected from the range of 5-50%, such as from the range of 5-40%, like from the range of 10-30%. Alternatively, in embodiments where P1 / P2≥1.05, the total reflectance (of the first redirection optical element, i.e., the semitransparent mirror) may be selected from the range of 50-95%, such as from the range of 60-95%, like from the range of 70-90%. A relative optical power (PR,lm) directed towards the luminescent material may then be defined by PR,lm=(R*P2 + (1-R)*P1) / (P2+P1). Similarly, a relative optical power (PR,da) directed towards the diffuser assembly may be defined by PR,da=(R*P1+ (1- R)*P2) / (P2+P1). Note that, in embodiments where λc1=λc2 the above defined relative optical powers may account for both the first and the second device light. However, in embodiments where λc1≠λc2 the above defined relative optical powers may be individually defined with respect to the first device light and the second device light. Hence, the first redirection optical element (i.e. the semitransparent mirror) may be used to steer (or divide) the light from two laser banks into two optical paths. Furthermore, it may be desired to provide a relatively higher optical power to the luminescent material (than to the diffuser assembly) to improve the system efficiency. Therefore, in 2024PF80129 14 embodiments, in an operational mode of the light generating system, a ratio PR,da / PR,lm may be selected from the range of 0.1-0.99. The first redirection optical element may especially be designed in dependence of the efficiencies of the color channels (i.e. the (e.g. yellow-green) luminescent material color channel and the (e.g. blue) diffuser color channel) to obtain a ratio PR,da / PR,lmsuitable for the desired system light spectral properties. In embodiments, in an operational mode of the light generating system, the ratio PR,da / PR,lm may especially be selected from the range of 0.1-0.95, such as from the range of 0.15-0.9, like from the range of 0.2-0.8, especially from the range of 0.25-0.7. Moreover, in embodiments, in an operational mode of the light generating system, the ratio PR,da / PR,lmmay especially be selected from the range of 0.1-0.65. In embodiments, the ratio PR,da / PR,lm may especially be selected through careful design of the semitransparent mirror. Furthermore, in embodiments, one may define an optical power out of the light exit. Especially, in embodiments, in an operational mode of the light generating system, an optical efficiency relative to the diffuser assembly ηda may be defined as ηda =PR,da,out / PR,da, where PR,da,outmay be defined as the optical power of (unconverted) device light propagating out of the light exit. Analogously, an optical efficiency relative to the luminescent material ηlmmay be defined as ηlm=PR,lm,out / PR,lm, where PR,lm,outmay be defined as the optical power of luminescent material light propagating out of the light exit. In such embodiments, a ratio PR,da,out / PR,lm,outmay be selected from the range of 0.1-0.65, such as from the range of 0.15- 0.45, like from the range of 0.25-0.40. Furthermore, a ratio of ηlm / ηda may be in the range of 0.45≤ηlm / ηda≤0.95, such as in the range of 0.5≤ηlm / ηda≥0.9, like in the range of 0.6≤ηlm / ηda≥0.8. In specific embodiments, the first redirection optical element may have a total reflectance (R) for (first and second) device light, wherein the total reflectance (R) may be selected from the range of 10-90 %; wherein a relative optical power (PR,lm) directed towards the luminescent material may be defined by PR,lm=(R*P2+ (1-R)*P1) / (P2+P1); wherein a relative optical power (PR,da) provided to the diffuser assembly may be defined by PR,da=(R*P1+ (1-R)*P2) / (P2+P1); and wherein (in an operational mode of the light generating system) a ratio PR,da / PR,lm may be selected from the range of 0.1-0.65. Such embodiments may be beneficial as the maximum optical power of the light generating devices (even though their respective maximum optical powers may be different) may be combined, and efficiently used in the light generating system. Alternatively, in specific embodiments, the first redirection optical element may have a total reflectance (R) for (first and second) device light, wherein the total 2024PF80129 15 reflectance (R) may be selected from the range of 10-90 %; wherein a relative optical power (PR,lm) directed towards the luminescent material may be defined by PR,lm=(R*P2eff + (1- R)*P1eff); wherein a relative optical power (PR,da) provided to the diffuser assembly may be defined by PR,da=(R*P1eff + (1-R)*P2eff); and wherein (in an operational mode of the light generating system) a ratio PR,da / PR,lmmay be selected from the range of 0.1-0.65. Hence, in such embodiments, the light generating devices may be (slightly) dimmed. The first redirection optical element may thus, in embodiments, comprise a semitransparent mirror. In embodiments, the semitransparent mirror may e.g. comprise one or more stacks of dielectric layers configured to tune the beam splitting properties without specific (or intended) spectral or polarization preferences. The semitransparent mirror may, in embodiments, comprise a material selected from a glass material, a sapphire material, a polymeric material, and a metallic material. In another instance, in embodiments, the first redirection optical element may comprise a patched mirror, i.e., a substrate comprising patches of different transmissive and reflective properties relative to the first and second device light received by the first redirection optical element. In embodiments, the patched mirror may comprise at least two patches, such as at least three patches, like at least four patches. Especially, in embodiments, the patched mirror may comprise at least two different patches, i.e., at least two patches having different optical characteristics. Furthermore, in embodiments, the patched mirror may comprise at most 25 patches, such as at most 20 patches, like at most 14 patches. Especially, in embodiments, the first redirection optical element may comprise a mirror comprising two or more parts (or sections), i.e., patches, having different optical characteristics. In such embodiments, the parts may especially have different reflectances and / or transmittances relative to the first and second device light. The patched mirror may, in embodiments, comprise two different types of patches configured in a(n alternating) pattern. For example, in embodiments, the patched mirror may comprise alternating strips of two different types of patches. Alternatively, in embodiments, the patched mirror may comprise three of more different types of patches. In such embodiments, the three of more different types of patches may be configured in a(n alternating) pattern. Yet, in such embodiments, the patched mirror may comprise two different types of patches, wherein one (or both) of said patches may comprise two or more different types of subpatches. For example, in embodiments, the patched mirror may comprise two different types of patches configured adjacent to each other, wherein at least one of those two patches may comprise alternating strips of two different types of patches. 2024PF80129 16 Hence, in embodiments, the first redirection optical element may comprise a patched mirror. In embodiments, the patched mirror may comprise one or more first patches having a first reflectance (R1) for first and second device light and a first transmittance (T1) for first and second device light. Further, in embodiments, the patched mirror may comprise one or more second patches having a second reflectance (R2) for first and second device light and a second transmittance (T2) for first and second device light. In embodiments the first patches and the second patches may be different, such that the first reflectance (R1) and the second reflectance (R2) may be unequal (i.e. R1≠R2) and / or the first transmittance (T1) and the second transmittance (T2) may be unequal (i.e. T1≠T2). Especially, in embodiments, R1 / R2≥1.05, such as R1 / R2≥1.15, like R1 / R2≥1.25. More especially, in embodiments, R1 / R2≥1.35, such as R1 / R2≥1.50, like R1 / R2≥1.75. Moreover, in embodiments, R1 / R2≥2, such as R1 / R2≥5, like R1 / R2≥10. Alternatively, in embodiments, R2 / R1≥1.05, such as R2 / R1≥1.15, like R2 / R1≥1.25. More especially, in embodiments, R2 / R1≥1.35, such as R2 / R1≥1.50, like R2 / R1≥1.75. Moreover, in embodiments, R2 / R1≥10, such as R2 / R1≥5, like R2 / R1≥2. Additionally or alternatively, in embodiments, T1 / T2≥1.05, such as T1 / T2≥1.15, like T1 / T2≥1.25. More especially, in embodiments, T1 / T2≥1.35, such as T1 / T2≥1.50, like T1 / T2≥1.75. Moreover, in embodiments, T1 / T2≥2, such as T1 / T2≥5, like T1 / T2≥10. Alternatively, in embodiments, T2 / T1≥1.05, such as T2 / T1≥1.15, like T2 / T1≥1.25. More especially, in embodiments, T2 / T1≥1.35, such as T2 / T1≥1.50, like T2 / T1≥1.75. Moreover, in embodiments, T2 / T1≥10, such as T2 / T1≥5, like T2 / T1≥2. In embodiments, the first reflectance, the first transmittance, the second reflectance, and the second transmittance, may especially be individually selected from the range of 0-100%, such as from the range of 40-100%, like from the range of 40-80%. With the patched mirror, in embodiments, a desired effective reflectance may be achieved through the placement (or configuration) of the patched mirror relative to the light generating devices. Furthermore, in embodiments, at least one of the first redirection optical element, the first solid state light source, and the second solid state light source may be (configured) movable (relative to the others). As such, the desired effective reflectance may be tuned by moving at least one of the first redirection optical element, the first solid state light source, and the second solid state light source. In embodiments, the light generating system may further comprise a movement element. The movement element may, in embodiments, be configured to move at least one of the first redirection optical element, the first light generating device, and the 2024PF80129 17 second light generating device. Especially, in embodiments, the movement element may be configured to move at least one of the first redirection optical element, the first light generating device, and the second light generating device relative to at least another one of the first redirection optical element, the first light generating device, and the second light generating device. In embodiments, the movement element may for example comprise an actuator. The movement element may for example be configured to move the first redirection optical element relative to the first light generating device and the second light generating device. Hence, in embodiments, the first light generating device and the second light generating device may be configured static relative to each other, while the first redirection optical element may move relative to both the first light generating device and the second light generating device. Such embodiments may be beneficial as the contribution of first and second device light to both the luminescent material and the diffuser may be tuned through movement of only the first redirection optical element. Additionally or alternatively, in embodiments, the movement element may be configured to move the first light generating device relative to the first redirection optical element. Hence, in embodiments, the second light generating device and the first redirection optical element may be configured static relative to each other, while the first light generating device may move relative to both the second light generating device and the first redirection optical element. Such embodiments may be beneficial as the contribution of second device light to both the luminescent material and the diffuser may be kept constant (e.g. should the second light generating device have a smaller number of solid state light sources, i.e., a smaller optical power), while the contribution of first device light to both the luminescent material and the diffuser may be tuned through movement of only the first light generating device (e.g. should the first light generating device have a larger number of solid state light sources, i.e., providing control over and / or compensation for the larger optical power). Yet additionally or alternatively, the movement element may be configured to move the second light generating device relative to the first redirection optical element. Hence, in embodiments, the first light generating device and the first redirection optical element may be configured static relative to each other, while the second light generating device may move relative to both the first light generating device and the first redirection optical element. Such embodiments may be beneficial as the contribution of first device light to both the luminescent material and the diffuser may be kept constant (e.g. should the first light generating device have a smaller number of solid state light sources, i.e., a smaller optical power), while the contribution of second device light to both the luminescent material and the diffuser may be tuned through movement of only the 2024PF80129 18 second light generating device (e.g. should the second light generating device have a larger number of solid state light sources, i.e., providing control over and / or compensation for the larger optical power). Furthermore, in embodiments, the light generating system may further comprise a control system (see also further below). In embodiments, the control system may be configured to control a spectral power distribution of the system light. Especially, in embodiments, the control system may be configured to control the spectral power distribution of the system light by controlling a spatial configuration (or placement) of the first redirection optical element, the (first light generating device comprising the) first solid state light source, and the (second light generating device comprising the) second solid state light source (relative to each other). For example, in embodiments, the first redirection optical element may be shifted by the control system to adjust the optical power transmitted (and reflected) by the first redirection optical element (thus adjusting the optical power provided to the luminescent material and diffuser assembly color channels). By decreasing or increasing the overlap between the (more reflective) patches of the patched mirror and the device light beams may change the power transmitted through the patched mirror. Hence, in embodiments, the first redirection optical element may comprise a patched mirror, wherein the patched mirror may comprise one or more first patches having a first reflectance (R1) and a first transmittance (T1), and one or more second patches having a second reflectance (R2) and a second transmittance (T2); wherein R1 / R2≥1.05 or R2 / R1≥1.05; wherein at least one of the first redirection optical element, the first solid state light source, and the second solid state light source may be movable; wherein the light generating system may further comprise a control system, wherein the control system may be configured to control a spectral power distribution of the system light by controlling a spatial configuration of the first redirection optical element, the first solid state light source, and the second solid state light source. In such embodiments, the light from laser banks with a different number of lasers may be efficiently combined into the two color channels (i.e. the (e.g. yellow-green) luminescent material color channel and the (e.g. blue) diffuser color channel). As such, different customized splitting ratios, tuned to the desired engine performance at a certain CCT, may be achieved. Additionally or alternatively, in such embodiments, the light from laser banks with the same or different pitch values (see also further below) may be efficiently combined into the two color channels. Yet additionally or alternatively, the light from laser banks arranged with overlapping (or not overlapping) beams may be efficiently combined into the two color channels. As such, the laser banks may be displaced such that the overlap 2024PF80129 19 between the beams coming from the distinct laser banks may be decreased, providing another way to tune reflection / transmission of the first redirection optical element. In embodiments, the patched mirror may comprise a (relatively simple) striped mirror. In such embodiments, the one or more first patches and the one or more second patches may be configured as alternating stripes. In embodiments, the stripes (resulting from alternating the patches) may extend along the full length of the first redirection optical element. Alternatively, in embodiments, the stripes (resulting from alternating the patches) may extend along only part of the length of the first redirection optical element. For example, in embodiments, the stripes may extend along at least 40% of the length of the first redirection optical element, such as at least 50%, like at least 60%, especially at least 70%. Furthermore, in embodiments, the stripes may extend along at most 100% of the length of the first redirection optical element, such as at most 95%, like at most 60%, especially at most 80%. In embodiments where the stripes extend along only part of the length of the first redirection optical element, the stripes may either be configured starting at an edge of the first redirection optical element or be configured in the middle (i.e. away from the edges, such as e.g. centered) of the first redirection optical element. Alternatively, in embodiments, the patched mirror may comprise a dotted mirror. In such embodiments, one of the one or more first patches and the one or more second patches may be configured as dots, whereas the other one of the one or more first patches and the one or more second patches may be configured as the area connecting the dots. In such embodiments, the dots may approximate a shape selected from the group comprising: a circular shape, an oval shape, a rectangular shape, a rhombus shape, a parallelogram shape, etc. In some embodiments, the first light generating device may comprise a first arrangement comprising a plurality of first lasers. Said first arrangement may, in embodiments, have a first arrangement pitch (p1). Herein, an arrangement pitch may be defined as the distance between successive corresponding solid state light sources (e.g. lasers) in the arrangement. Such a distance may herein especially refer to a distance between the centers of the corresponding solid state light sources. Thus analogously, in embodiments, the second light generating device may comprise a second arrangement comprising a plurality of second lasers. Said second arrangement may, in embodiments, have a second arrangement pitch (p2). In embodiments, the patched mirror may be designed to complement the first and second arrangement pitches. Therefore, in embodiments, the patched mirror may comprise a plurality of first patches and a plurality of second patches having a third pitch 2024PF80129 20 (p3). Here, the pitch may be defined as the distance between successive corresponding (first and second) patches in the patched mirror. Such a distance may herein especially refer to a distance between the (relative) centers of the corresponding patches. In embodiments, the light generating system may be configured such that p1=n1*p3, wherein n1 may be selected from at least 1. For example, n1 may be selected from the range of 1-8, such as from the range of 1-5, like from the range of 2-4. Additionally or alternatively, in embodiments, the light generating system may be configured such that p2=n2*p3, wherein n2 may be selected from at least 1. For example, n2 may be selected from the range of 1-8, such as from the range of 1-5, like from the range of 2-4. For example, in embodiments, p1=p2=p3, i.e., n1=1 and n2=1. Alternatively, in embodiments, p1=SQRT(2)*p3 and p2=SQRT(2)*p3. Hence, in such embodiments, n1=SQRT(2) and n2=SQRT(2). Other examples may be clear to the skilled person. Especially, in embodiments, the third pitch (p3) may complement one or both of the first arrangement pitch (p1) and the second arrangement pitch (p2). Hence, in embodiments, the first light generating device may comprises a first arrangement comprising a plurality of first lasers having a first arrangement pitch (p1); the second light generating device may comprises a second arrangement comprising a plurality of second lasers having a second arrangement pitch (p2); the patched mirror may comprise a plurality of first patches and a plurality of second patches having a third pitch (p3); and wherein the third pitch (p3) complements (both) the first arrangement pitch (p1) and the second arrangement pitch (p2). In embodiments, the one or more first patches may especially comprise a first area (A1) of between 10-90% of an (effective) area of the first redirection optical element, such as between 20-80%, like between 30-70%. Analogously, in embodiments, the one or more second patches may especially comprise a second area (A2) of between 10-90% of an (effective) area of the first redirection optical element, such as between 20-80%, like between 30-70%. For example, in embodiments, the one or more first patches and the one or more second patches may both comprise a respective (first / second) area of 50%. Such embodiments may e.g. apply when the patched mirror may comprise alternating stripes of first patches and second patches of equal size. However, this may not necessarily be the case. For example, in alternative embodiments, A1≥1.05*A2 or A2≥1.05*A1, such as A1≥1.5*A2 or A2≥1.5*A1, like A1≥2*A2or A2≥2*A1. Further as described above, in embodiments, the first light generating device may be operated at an effective first optical power (P1eff). Similarly, in embodiments, the second light generating device may be operated at an effective second optical power (P2eff). As such, in embodiments, the light generating system may be configured such that x% of the 2024PF80129 21 effective first optical power (P1eff) may be incident on the first patches, whereas 100-x% of the effective first optical power (P1eff) may be incident on the second patches. In such embodiments, x may be selected from the range of 0-100, such as from the range of 10-90, like from the range of 20-80, especially from the range of 30-70. Analogously, in embodiments, the light generating system may be configured such that y% of the effective second optical power (P2eff) may be incident on the first patches, whereas 100-y% of the effective second optical power (P2eff) may be incident on the second patches. In such embodiments, y may be selected from the range of 0-100, such as from the range of 10-90, like from the range of 20-80, especially from the range of 30-70. Now based on the above values, in embodiments, a first device light effective reflectance (R1eff) (with respect to the first redirection optical element) may be defined as R1eff = (x / 100*R1)+(1-x / 100)*R2. Similarly, in embodiments, a second device light effective reflectance (R2eff) (with respect to the first redirection optical element) may be defined as R2eff = (y / 100*R1)+(1-y / 100)*R2. As a result of said effective reflectances, a luminescent optical power (Plm) may be provided in an optical path to the luminescent material. Especially, in embodiments, a luminescent optical power (Plm) (of the first part of the device light) propagating in an optical path to the luminescent material may be defined as PLM=(1- R1eff)* P1eff +R2eff* P2eff. Similarly, in embodiments, a diffuser (assembly) optical power (Pda) may be provided in an optical path to the diffuser assembly. Especially, in embodiments, a diffuser optical power (Pda) (of the second part of the device light) propagating in an optical path to the diffuser assembly may be defined as PDA=R1eff* P1eff +(1-R2eff)* P2eff. Hence, the first redirection optical element (i.e. the patched mirror) may be used to divide the light from two laser banks into two optical paths. Furthermore, it may be desired to provide a relatively higher optical power to the luminescent material (than to the diffuser assembly) to improve the system efficiency. Therefore, in embodiments, in an operational mode of the light generating system, a ratio Pda / Plm may be selected from the range of 0.1-0.99. The first redirection optical element may especially be designed in dependence of the efficiencies of the color channels (i.e. the (e.g. yellow-green) luminescent material color channel and the (e.g. blue) diffuser color channel) to obtain a ratio Pda / Plmsuitable for the desired system light spectral properties. In embodiments, in an operational mode of the light generating system, the ratio Pda / Plmmay especially be selected from the range of 0.1-0.95, such as from the range of 0.15-0.9, like from the range of 0.2-0.8, especially from the range of 0.25-0.7. Moreover, in embodiments, in an operational mode of 2024PF80129 22 the light generating system, the ratio Pda / Plm may especially be selected from the range of 0.1- 0.65. In embodiments, the ratio Pda / Plm may especially be selected through careful design of the patches of the patched mirror and their configuration relative to the first device light and the second device light (see also further below). Hence, in embodiments, the first light generating device may have a first effective optical power (P1eff), the second light generating device may have a second effective optical power (P2eff), and the light generating system may be configured such that: (i) x% of the first effective optical power (P1eff) may be incident on the first patches and 100-x% of the first effective optical power (P1eff) may be incident on the second patches, wherein x may be selected from the range of 0-100; (ii) y% of the second effective optical power (P2eff) may be incident on the first patches and 100-y% of the second effective optical power (P2eff) may be incident on the second patches, wherein y may be selected from the range of 0-100; (iii) a first device light effective reflectance (R1eff) may be defined as R1eff= (x / 100*R1)+(1-x / 100)*R2; (iv) a second device light effective reflectance (R2eff) may be defined as R2eff = (y / 100*R1)+(1-y / 100)*R2; (v) a luminescent optical power (PLM) propagating in an optical path to the luminescent material may be defined as PLM=(1- R1eff)*P1eff+R2eff*P2eff; (vi) a diffuser optical power (PDA) propagating in an optical path to the diffuser assembly may be defined as PDA=R1eff*P1eff+(1-R2eff)*P2eff; and (vii) (in an operational mode of the light generating system) a ratio PDA / PLM may be selected from the range of 0.1-0.65. Hence, in embodiments, the first redirection optical element may comprise one of a semitransparent mirror and a patched mirror. Moreover, in embodiments, the first redirection optical element may not comprise a polarization-based redirection optical element (such as polarizing beam splitter) or a spectral-based redirection optical element (such as a dichroic (or spectral) beam splitter). Hence, in embodiments the first redirection optical element may have transmission properties and / or reflection properties at wavelengths of the (first and / or second) device light which (transmission properties and / or reflection properties) may essentially be independent of polarization and wavelength. Yet in another instance, in embodiments, the first redirection optical element may comprise a polarization-based redirection optical element, i.e., may comprise a (partially) polarizing beam splitter (PBS). 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 2024PF80129 23 light comprising relatively more s-polarization than p-polarization may be (at least partially) combined with a polarization-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, 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, in embodiments, the polarizing beam splitter may be configured to direct at least 60%, like at least 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 radiant power (e.g. in Watt) for the spectral emission range of the light source. 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). Furthermore, in such embodiments, the light generating system may be configured such that the (first and second) device light received by the first redirection optical element may comprise polarized light. Yet in another instance, in embodiments, the first redirection optical element may comprise a spectral-based redirection optical element, such as a spectral (e.g. dichroic) 2024PF80129 24 beam splitter. In embodiments via spectral multiplexing, device light from different light generating devices may be combined provided that they differ in spectral power distribution. For instance, device light (from at least 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 spectral-based redirection optical element (which may also be indicated as dichroic beam combiner or dichroic beam splitter). In embodiments, the spectral-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 spectral-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 such embodiments, the light generating system may be configured such that the (first and second) device light received by the first redirection optical element may have different spectral power distributions. For example, in embodiments, the first device light may have a (centroid) wavelength selected from the wavelength range of 430-450 nm, whereas the second device light may have a (centroid) wavelength selected from the wavelength range of 470-510 nm. Moreover, in embodiments, the first redirection optical element may comprise a semitransparent mirror, a patched mirror, or a polarizing beam splitter in combination with a dichroic coating (i.e. a spectral-based redirection optical element). Such embodiments may especially be beneficial when one of the (first and second) device light received by the first redirection optical element may have a spectral power distribution different from an excitation wavelength of the luminescent material, such as e.g. in the red wavelength range. In such embodiments, the dichroic coating may be configured such that essentially all of the device light having the spectral power distribution different from an excitation wavelength of the luminescent material may be directed towards the diffuser assembly (rather than divided over the diffuser assembly and the luminescent material). Note that, alternatively to a dichroic coating also a separate spectral-based redirection optical element may be used to direct the device light having the spectral power distribution different from an excitation wavelength of the luminescent material towards the diffuser assembly. Hence, in embodiments, the first redirection optical element may comprise one of a semitransparent mirror, a patched mirror, a polarizing beam splitter, and a spectral beam splitter. Especially, the first redirection optical element may comprise one of a 2024PF80129 25 semitransparent mirror and a patched mirror. In any case, in embodiments, the first redirection optical element may be configured to direct in the first operational mode of the light generating system at least part of device light received by the first redirection optical element in an optical path to the luminescent material. In such embodiments, the device light especially comprises at least part of both the first device light and the second device light. In embodiments where the first redirection optical element comprises one of a semitransparent mirror and a patched mirror, it may especially (re-)direct the light received by the first redirection optical element independently (or irrespective of) the polarization of the first device light and the polarization of the second device light. Additionally, the first redirection optical element may especially do so independently (or irrespective of) the spectral power distribution of the first device light and the polarization of the second device light. Additionally, in embodiments, the first redirection optical element may be configured to direct in the first operational mode of the light generating system at least part of device light received by the first redirection optical element in an optical path to the diffuser assembly. In such embodiments, the device light especially comprises at least another part of both the first device light and the second device light. In embodiments where the first redirection optical element comprises one of a semitransparent mirror and a patched mirror, it may especially (re-)direct the light received by the first redirection optical element independently (or irrespective of) the polarization of the first device light and the polarization of the second device light. Additionally, the first redirection optical element may especially do so independently (or irrespective of) the spectral power distribution of the first device light and the polarization of the second device light. In embodiments, the luminescent material may thus be configured (optionally via one or more further (optical) elements) in a light-receiving relationship with the first redirection optical element. In other words, the luminescent material may, in such embodiments, be configured downstream of the first redirection optical element. In embodiments, the luminescent material may be configured to convert at least part of the (first and second) device light received by the luminescent material 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 (first and 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 (first and second) device light received by the luminescent material into luminescent material light. 2024PF80129 26 Note that the herein 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 might 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 about 90% (energy conversion efficiency). The term “luminescent material” especially refers to a material that can convert first radiation,(especially one or more of UV radiation and blue radiation,) into second radiation. In general, the first radiation and second radiation have different spectral power distributions. Hence, instead of the term “luminescent material”, also the terms “luminescent converter” or “converter” may be applied. Further, instead of the term “luminescent material” also the term “phosphor” may be applied. These terms are known to the person skilled in the art. In general, the second radiation has a spectral power distribution at larger wavelengths than the first radiation, which is the case in the so-called down- conversion. In specific embodiments, however the second radiation has a spectral power distribution with intensity at smaller wavelengths than the first radiation, which is the case in the so-called up-conversion. In embodiments, the “luminescent material” may especially refer to a material that can convert radiation into e.g. visible and / or infrared light. For instance, in embodiments the luminescent material may be able to convert one or more of UV radiation and blue radiation, into visible light. The luminescent material may in specific embodiments also convert radiation into infrared radiation (IR). Hence, upon excitation with radiation, the luminescent material emits radiation. In general, the luminescent material will be a down converter, i.e. radiation of a smaller wavelength is converted into radiation with a larger wavelength (λex<λem), though in specific embodiments the luminescent material may comprise up-converter luminescent material, i.e. radiation of a larger wavelength is converted into radiation with a smaller wavelength (λex>λem). 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 2024PF80129 27 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%. 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 of 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 2024PF80129 28 (In), especially up to about 20% of Al, more especially up to about 10 % of Al (i.e. the B ions essentially consist of 90 or more mole % of Al and 10 or less mole % of one or more of Ga, Sc and In); B may especially comprise up to about 10% gallium. In another variant, B and O may at least partly be replaced by Si and N. The element A may especially be selected from the group consisting of yttrium (Y), gadolinium (Gd), terbium (Tb) and lutetium (Lu). Further, Gd and / or Tb are especially only present up to an amount of about 20% of A. In a specific embodiment, the garnet luminescent material comprises (Y1-xLux)3B5O12:Ce, wherein x is equal to or larger than 0 and equal to or smaller than 1. The term “:Ce”, indicates that part of the metal ions (i.e. in the garnets: part of the “A” ions) in the luminescent material is replaced by Ce. For instance, in the case of (Y1-xLux)3Al5O12:Ce, part of Y and / or Lu is replaced by Ce. This is known to the person skilled in the art. Ce will replace A in general for not more than 10%; in general, the Ce concentration will be in the range of 0.1 to 4%, especially 0.1 to 2% (relative to A). Assuming 1% Ce and 10% Y, the full correct formula could be (Y0.1Lu0.89Ce0.01)3Al5O12. Ce in garnets is substantially or only in the trivalent state, as is known to the person skilled in the art. In 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- 2024PF80129 29 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 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’xM2-2xAX6 doped 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’xM2-2xAX6 phosphor, 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 2024PF80129 30 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 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’xM2-2xAX6luminescent 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’xM2-2xAX6doped 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’xM2-2xAX6comprises K2SiF6(indicated herein also as KSiF system). As indicated above, in another preferred embodiment, M’xM2-2xAX6 comprises 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-mMnmF6or 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. 2024PF80129 31 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. 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. In general, the luminescent material may give rise to quite a lot of thermal dissipation. 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 arranged relative to each other at a distance of equal to or less than about 10 µm, though larger distances, such as up to 100 µm may be possible. The shorter the distance, the better the 2024PF80129 32 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). 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 another thermally conductive element. As described above, in embodiments, the optical elements (especially at least the first redirection optical element) may thus be configured to direct a first part of the device light (comprising at least part of both the first and second device light) in an optical path to the luminescent material. Additionally, in embodiments, the optical elements (especially at least the first redirection optical element) may be configured to direct in the first operational 2024PF80129 33 mode of the light generating system a second part of the device light (comprising at least part of both the first and second device light) in an optical path to the diffuser assembly. In embodiments, the diffuser assembly may comprise (at least) a diffuser. The diffuser may, in embodiments, be configured to diffuse (or scatter) at least part of the device light received by the diffuser. Especially, the 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 diffuser into diffused device light. In specific embodiments, the diffuser may be configured to diffuse (or scatter) at least part of the (first and second) device light received by the diffuser. Examples and further embodiments of the diffuser (assembly) will be described in more detail below. In an operational mode of the light generating system, the system may thus be configured to generate (e.g. yellow-green) luminescent material light at the luminescent material and (e.g. blue) diffused device light at the diffuser. In embodiments, the optical elements may further be configured in a light-receiving relationship with both the luminescent material and the diffuser assembly. Especially, in embodiments, the optical elements may be configured to combine the luminescent material light and the diffused device light into a same optical path. More especially, in embodiments, the optical elements may be configured to direct both the luminescent material light and the diffused device light in an optical path to the light exit. The light exit may thus, in embodiments, be configured to generate diffused device light and luminescent material light. Especially, in the first operational mode of the light generating system, the light generating system may be configured to generate system light comprising at least part of the diffused device light and at least part of the luminescent material light. In embodiments, the light generating system may comprise one or more operational modes. In some embodiments, there may only be a first operational mode, and in other embodiments there may be a first operational mode, a second operational mode, etc. etc. Especially, herein the term “a first operational mode” and similar terms may also refer to one or more, such as a plurality of first operational modes. Hence, in embodiments, there may be a plurality of (first) operational modes. For example, in embodiments, in an operational mode of the light generating system, both the first light generating device and the second light generating device (and optionally the third light generating device) may be operated (i.e. may be turned on). Alternatively, in embodiments, in another operational mode of the light generating system, only one of the first light generating device and the second 2024PF80129 34 light generating device may be operated (i.e. may be turned on), whereas the other one of the first light generating device and the second light generating device may be turned off. In specific embodiment, at least one of the first device light and the second device light (and optionally the third device light, see also further below) may have a wavelength selected from the wavelength range of 430-490 nm. In such embodiments, the system light may thus 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 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 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 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 2000-12000 K, 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. For example, in embodiments, the correlated color temperature (CCT) may be selected from the range of 2000-12000 K, in combination with a CRI of at least 70. In embodiments, in an operational mode of the light generating system, the system light may especially be white light having a correlated color temperature selected from the range of 2000-10000 K, such as selected from the range of 6000-10000 K, like selected from the range of 6500-8000K. Additionally or alternatively, in embodiments, in an operational mode of the light generating system, the system light may especially be white light having a color rendering index of at least 60, such as at least 65, like at least 70, especially at least 80, more especially at least 90. As described above, in embodiments, the luminescent material may be configured in either the reflective or the transmissive mode. Similarly, in embodiments, the diffuser may be configured in the reflective mode or the transmissive mode. In embodiments, the diffuser may especially be configured in the reflective mode. As such, in embodiments, 2024PF80129 35 the reflective diffuser may be (diffuse) reflective for (first, second, and optional further) 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 one or more materials selected from the group comprising: a glass with a structured surface, a silicone-based material (e.g. a silicone-based material with surface structuring configured on top of a reflective substrate), and a 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) reflective coating, a combination of optical micro- structures with specular reflective elements, a combination of a solid optical body with a diffuse reflector, a 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 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 device light may have an optical axis relative to the diffuser. Especially, in embodiments, relative to the diffuser the incident 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. In embodiments, the (incident) optical axis (Oi) and the (reflection) optical axis (Or) may 2024PF80129 36 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 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 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) 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. 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. 2024PF80129 37 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 embodiments, the incoming (first and second, and optionally further) device light may especially comprise polarized light. Especially, in specific embodiments, the (first and second, and optionally further) 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 alters the polarization state of a light wave travelling through it. 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 into elliptically (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) 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 first redirection optical element) may thus be configured to direct (first and second, and optionally 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 2024PF80129 38 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 first redirection optical element 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 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 device light. 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. In such embodiments, the first redirection optical element may comprise a polarizing beam splitter, which may be configured to separate (or direct into different optical paths) the device light from the diffused device light. Alternatively, in such embodiments, the optical elements may comprise an additional polarizing beam splitter configured in an optical path between the first redirection optical element and the diffuser assembly. As such, in embodiments, the additional polarizing beam splitter may be configured to separate (or direct into different optical paths) the device light from the diffused device light. Especially, in embodiments, the additional polarizing beam splitter may be configured to transmit the device light (comprising the first linear polarization) in an optical path to the diffuser and to reflect the diffused device light (comprising the second linear polarization) in an optical path to the light exit. Alternatively, in embodiments, the additional polarizing beam splitter may be configured to reflect the device light (comprising the first linear polarization) in an optical path to the diffuser and to transmit the diffused device light (comprising the second linear polarization) in an optical path to the light exit. Furthermore, in embodiments, the optical elements may comprise a second redirection optical element. In embodiments, the second redirection optical element may comprise (at least) a dichroic beam combiner. Especially, in embodiments, the second redirection optical element may be configured to transmit or reflect light received by the second redirection optical element in dependence of its spectral power distribution. The second redirection optical element may, in embodiments, be configured in a light-receiving relationship (optionally via further optical elements) with both the luminescent material and 2024PF80129 39 the diffuser assembly. As such, in embodiments, the second redirection optical element may be configured to transmit (at least part of) the luminescent material light (received by the second redirection optical element) in an optical path towards the light exit and reflect (at least part of) the diffused device light (received by the second redirection optical element) in an optical path towards the light exit. Alternatively, in embodiments, the second redirection optical element may be configured to reflect (at least part of) the luminescent material light (received by the second redirection optical element) in an optical path towards the light exit and transmit (at least part of) the diffused device light (received by the second redirection optical element) in an optical path towards the light exit. Hence, the second redirection optical element may be configured to combine the luminescent material light and the diffused device light into (system light along) the same optical path to the light exit. The second redirection optical element may, in embodiments, comprise the dichroic beam combiner in combination with the above described additional polarizing beam splitter. Hence, in embodiments, the second redirection optical element may comprise both spectral-based redirection functionality and polarization-based redirection functionality. Alternatively, in embodiments, the second redirection optical element and the additional polarizing beam splitter may comprise separate (discrete) optical element. Nonetheless, in embodiments, the optical elements may comprise a second redirection optical element, wherein the second redirection optical element may comprises (at least) a dichroic beam combiner configured to transmit or reflect light received by the second redirection optical element in dependence of its spectral power distribution; wherein the second redirection optical element may be configured in a light-receiving relationship with the luminescent material and the diffuser assembly, wherein the second redirection optical element may be configured to (i) transmit the luminescent material light in an optical path towards the light exit and reflect the diffused device light in an optical path towards the light exit, or (ii) reflect the luminescent material light in an optical path towards the light exit and transmit the diffused device light in an optical path towards the light exit. As described above, in embodiments, the light generating system may comprise more light generating devices. Especially, in some embodiments, the light generating system may comprise a third light generating device. The third light generating device may, in embodiments, 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 2024PF80129 40 third solid state light source. Hence, in embodiments, the third light generating device may comprise one or more of a laser diode, a superluminescent diode, and a stacked multi- junction light-emitting diode (LED). In specific embodiments, the third light generating device may comprise at least two third solid-state light sources, such as e.g. two lasers. 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. 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 v*w array. In such embodiments, v and w 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. In embodiments, the third light generating device may comprise a third laser bank comprising k first lasers. In embodiments, k may be selected from the range of 2-36, especially from the range of 4-28. 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 third centroid wavelength (λc3) 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 third device light may have a third centroid wavelength (λc3) selected from the wavelength range of 440-490 nm, such as from the wavelength range of 450-480 nm. Hence, in embodiments, the third device light may be blue light. However, in alternative embodiments, the third device light may be essentially any color. Especially, in embodiments, the third centroid wavelength (λc3) may be selected from the visible wavelength range (380-780 nm). Yet further, in embodiments, the third light generating device may have a third maximum optical power (P3). Herein, a maximum optical power may especially refer to the maximum energy per unit time that may be provided by the third light generating device (or in other words may be transported by the third device light). Note that, in embodiments, the third light generating device may be configured to operate at its third maximum optical power (P3). However, in other embodiments, the third light generating device may be operated at a (slightly) lower effective third optical power (P3eff). For example, in embodiments, the third light generating device may be configured to operate at a dimmed setting. In embodiments, the third light generating device may be configured to operate at an 2024PF80129 41 effective third optical power (P3eff) of at least 70% of the third maximum optical power (P3), such as at least 80%, like at least 90%, especially at least 95%. More especially, in embodiments, the third light generating device may be configured to operate at an effective third optical power (P3eff) of at least 98% of the third maximum optical power (P3), like at least 99%, including 100% of the third maximum optical power (P3). Especially, the third light generating device, in the first operational mode of the light generating system may be operated at an (effective third) optical power (P3eff) selected from the range of 70-100%, like from the range of 75-100%, especially from the range of 85-99% of its respective maximum optical power (P3). The luminescent material may, in embodiments, further be configured in a light-receiving relationship (optionally via one or more optical elements, such as e.g. the first redirection optical element) with the third light generating device. Especially, in embodiments, the luminescent material may be configured to convert at least part of the third device light received by the luminescent material into luminescent material light (i.e. similarly to the first and second device light). In embodiments, the relative optical power (PR,lm) directed towards the luminescent material may (conversely to the above) be defined by PR,lm=((1-R)*Pi+ R*P(3-i)+ (2-i)*P3) / (P1+P2+P3), wherein i may be selected from 1 and 2. Moreover, in such embodiments, the total reflectance (R) for (first and second) device light (as described above) may be selected from the range of 0-100%. Such a total reflectance may be selected in dependence of the configuration of the light generating system. Furthermore, in embodiments where the light generating system may comprise the third light generating device, it may further comprise a third redirection optical element. The third redirection optical element may, in embodiments, be configured in a light-receiving relationship with the first redirection optical element and the third light generating device. Especially, the third redirection optical element may be configured in an optical path between the third light generating device and the luminescent material. Additionally, the third redirection optical element may be configured in an optical path between the first redirection optical element and the luminescent material. The third redirection optical element may, in embodiments, be configured to transmit the third device light received by the third redirection optical element in an optical path to the luminescent material. Additionally, in such embodiments, the third redirection optical element may be configured to reflect the first part of device light received by the third redirection optical element in an optical path to the luminescent material. However, in alternative embodiments, the third redirection optical element may be configured to reflect the third device light received by the third redirection 2024PF80129 42 optical element in an optical path to the luminescent material. Additionally, in such embodiments, the third redirection optical element may be configured to transmit the first part of device light received by the third redirection optical element in an optical path to the luminescent material. Hence, in embodiments, the optical elements may comprise a third redirection optical element, wherein the third redirection optical element may be configured in a light-receiving relationship with the first redirection optical element and the third light generating device; wherein the third redirection optical element may be configured to (i) transmit the third device light and reflect the first part of device light in an optical path to the luminescent material, or (ii) reflect the third device light and transmit the first part of device light in an optical path to the luminescent material. Such embodiments may provide the benefit of providing increased optical power to the luminescent material, which may help improve the CCT of the system light. In some embodiments, the third redirection optical element may comprise a (second) polarizing beam splitter (or polarizing beam combiner). Hence, in such embodiments, the third redirection optical element may be configured to combine the first part of the device light (comprising at least part of both the first device light and the second device light) received from the first redirection optical element and the third device light in dependence of their respective polarizations. Especially, in such embodiments, the first part of the device light (comprising at least part of both the first device light and the second device light) and the third device light reaching the third redirection optical element may comprise complementary (such as e.g. opposite) linear polarizations. In other embodiments, the third redirection optical element may comprise a spectral beam combiner. Hence, in such embodiments, the third redirection optical element may be configured to combine the first part of the device light (comprising at least part of both the first device light and the second device light) received from the first redirection optical element and the third device light in dependence of their respective spectral power distributions. Especially, in such embodiments, the first part of the device light (comprising at least part of both the first device light and the second device light) and the third device light reaching the third redirection optical element may have (slightly) different wavelengths. More especially, in such embodiments, 3 nm ≤|λc1-λc3|≤30 nm and 3 nm ≤|λc2-λc3|≤30 nm. In yet other embodiments, the third redirection optical element 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 2024PF80129 43 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 third redirection optical element 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. 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 2024PF80129 44 the device light. Hence, in embodiments, the third redirection optical element may be configured to combine the first part of the device light (comprising at least part of both the first device light and the second device light) received from the first redirection optical element and the third device light in dependence of their spatial configuration (such as e.g. in dependence of their angle of incidence relative to a surface normal (Ni) of the geometric beam combiner. 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, second, and third) 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. Embodiments as described herein may thus provide the benefits of improving brightness, flux, spectral power distribution, and tuneability of the CCT of the system light, as the fraction of device light in the diffuser channel versus the luminescent material channel may be controlled. Therefore, in embodiments, the light generating system may further comprise a control system. The control system may especially be configured to control one or more of the color point of the system light, the luminous flux of the system light, the correlated color temperature of the system light, the color rendering index of the system light, a spectral power distribution of the system light, and a radiant flux of the system light. In embodiments, the control system may e.g. control said characteristics of the system light by controlling (the power of) one or more of the light generating devices. Additionally, in embodiments, the control system may said characteristics of the system light by controlling the spatial configuration of the first redirection optical element, the first solid state light source, and the second solid state light sources (relative to each other). In specific embodiments, the control system may be configured to control the spatial configuration of the first redirection optical element, the first solid state light source, and the second solid state light sources, such that in an operational mode the system light may have a first correlated color temperature (CCT1). In such embodiments, the operational mode may be (one of) the first operational mode, or another operational mode. Additionally or alternatively, in embodiments, the control system may be configured to control the spatial configuration of the first redirection optical element, the first solid state light source, and the second solid state light sources, such that in another operational mode the system light may have a second correlated color temperature (CCT2). In such embodiments, the operational mode may be (one of) the first operational mode, or another operational mode. Especially, in 2024PF80129 45 embodiment, 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≥100 K, like CCT2-CCT1≥300 K, like CCT2- CCT1≥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. 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 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 2024PF80129 46 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 of knowledge (input by a user interface of with an optical sensor (e.g. QR code reader) of the (unique) code. The lighting system may also comprise means for communicating with other systems or devices, such as on the basis of Bluetooth, Thread, WIFI, LiFi, ZigBee, BLE or WiMAX, or another wireless technology. The system, or apparatus, or device may execute an action in a “mode” or “operation mode” or “mode of operation” or “operational mode”. The term “operational mode may also be indicated as “controlling mode”. Likewise, in a method an action or stage, or step may be executed in a “mode” or “operation mode” or “mode of operation” or “operational mode”. This does not exclude that the system, or apparatus, or device may also 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. As indicated above, the luminescent material may give rise to quite a lot of thermal dissipation. Similarly, the (reflective) diffuser assembly 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 and the diffuser may be configured on the rotating element, such as especially at least the luminescent material. Hence, in embodiments, the first diffuser may comprise a static diffuser or a dynamic diffuser, such as a rotating wheel with a reflective diffuser track. 2024PF80129 47 Additionally to the redirection optical elements, in embodiments, the light generating system may comprise optics configured such that the diffused 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 an (i.e. at least one) optical integrator. Especially, in embodiments, the optical elements may comprise one or more optical integrators. Herein, an optical integrator may refer to an optical element configured to homogenize light received by the optical integrator (, i.e., to provide a more uniform beam of light than the beam of light that was incident on the optical 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, and an integrating polygonal light pipe. 2024PF80129 48 In embodiments, at least one optical integrator may be configured in an optical path between the first redirection optical element and the diffuser (assembly). Hence, in such embodiments, the optical integrator may be configured in a light-receiving relationship with 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 diffuser (assembly). In turn, the 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. Hence, in embodiments, at least one optical integrator may be configured between (at least one of) the light generating devices and the diffuser (assembly). Additionally or alternatively, in embodiments, at least one optical integrator may be configured in an optical path between (at least one of) the (first and / or second) light generating device(s) 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 generating system may (also) comprise an optical integrator configured in an optical path between the first redirection optical element and the luminescent material. Hence, in embodiments, at least one optical integrator may be configured between (at least one of) the light generating devices and the luminescent material. Furthermore, in embodiments, the light generating system may comprise additional optical integrators. For example, in embodiments, the light generating system may 2024PF80129 49 comprise an optical integrator configured downstream of both the diffuser assembly and the luminescent material and upstream of the light exit. Especially, in such embodiments, (at least 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 device light and the luminescent material light received by the optical integrator into homogenized system light. 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 diffuser assembly may comprise 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 assembly. Especially, in embodiments, condensing and / or collimating optics (such as e.g. positive lenses) may be configured in an optical path between the first redirection optical element and the luminescent material. Additionally or alternatively, in embodiments, condensing and / or collimating optics may be configured in an optical path between the first redirection optical element and the diffuser. The light generating system may be part of or may be applied in e.g. office lighting systems, household application systems, shop lighting systems, home lighting systems, accent lighting systems, spot lighting systems, theater lighting systems, fiber-optics application systems, projection systems, self-lit display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, indicator sign systems, decorative lighting systems, portable systems, automotive applications, (outdoor) road lighting systems, urban lighting systems, green house lighting systems, horticulture lighting, digital projection, or LCD backlighting. The light 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 2024PF80129 50 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 440-490 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 configured to generate light source light. In embodiments, the device light may essentially consist of the device light. In other embodiments, the device light may essentially consist of converted light source light. In yet other embodiments, the device light may comprise (unconverted) light source light and converted light source light. Light source light may be converted with a luminescent material into luminescent material light and / or with an upconverter into upconverted light (see also below). The term “light generating device” may also refer to a plurality of light generating devices which may provide device light having essentially the same spectral power distributions. In specific embodiments, the term “light generating device” may also refer to a plurality of light generating devices which may provide device light having different spectral power distributions. The term “light source” may in principle relate to any light source known in the art. 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 2024PF80129 51 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. 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 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. 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 2024PF80129 52 state light source as such, like a blue LED, is a light source. A combination of a solid state light source (as light generating element) and a light converter element, such as a blue LED and a light converter element, optically coupled to the solid state light source, may also be a light source (but may also be indicated as light generating device). Hence, a white LED is a light source (but may e.g. also be indicated as (white) light generating device). The term “light source” herein may also refer to a light source comprising a solid state light source, such as an LED or a laser diode or a superluminescent diode. The term “light source” may (thus) in embodiments also refer to a light source that is (also) based on conversion of light, such as a light source in combination with a luminescent converter material. Hence, the term “light source” may also refer to a combination of an LED with a luminescent material configured to convert at least part of the LED radiation, or to a combination of a (diode) laser with a luminescent material configured to convert at least part of the (diode) laser radiation. In embodiments, the term “light source” may also refer to a combination of a light source, like an LED, and an optical filter, which may change the spectral power distribution of the light generated by the light source. Especially, the term “light generating device” may be used to address a light source and further (optical components), like an optical filter and / or a beam shaping element, etc. The phrases “different light sources” or “a plurality of different light sources”, and similar phrases, may in embodiments refer to a plurality of solid-state light sources selected from at least two different bins. Likewise, the phrases “identical light sources” or “a plurality of same light sources”, and similar phrases, may in embodiments refer to a plurality of solid-state light sources selected from the same bin. The term “solid state light source”, or “solid state material light source”, and similar terms, may especially refer to semiconductor light sources, such as a light emitting diode (LED), a diode laser, or a superluminescent diode. The term “laser light source” especially refers to a laser. Such laser may especially be configured to generate laser light source light having one or more wavelengths in the UV, visible, or infrared, especially having a wavelength selected from the spectral 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). 2024PF80129 53 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 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 diodes, such as GaN, InGaN, AlGaInP, AlGaAs, InGaAsP, lead salt, vertical cavity surface emitting laser (VCSEL), 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. 2024PF80129 54 Hence, in embodiments lasers in a laser bank (or “laser array bank”) may share the same optics. The laser light source is configured to generate laser light source light (or “laser light”). The light source light may essentially consist of the laser light source light. The light source light may also comprise laser light source light of two or more (different or identical) laser light sources. For instance, the laser light source light of two or more (different or identical) laser light sources may be coupled into a light guide, to provide a single beam of light comprising the laser light source light of the two or more (different or identical) laser light sources. In specific embodiments, the light source light is thus especially collimated light source light. In yet further embodiments, the light source light is especially (collimated) laser light source light. The laser light source light may in embodiments comprise one or more bands, having band widths as known for lasers. In specific embodiments, the band(s) may be relatively sharp line(s), such as having full width half maximum (FWHM) in the range of less than 20 nm at RT, such as equal to or less than 10 nm. Hence, the light source light has a spectral power distribution (intensity on an energy scale as function of the wavelength) which may comprise one or more (narrow) bands. 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. Collimation may be executed with one or more (other) optics, like collimation elements, such as lenses and / or parabolic mirrors. In embodiments, the beam of (laser) light source light may be relatively highly collimated, such as in embodiments ≤2° (FWHM), more especially ≤1° (FWHM), most especially ≤0.5° (FWHM). Hence, ≤2° (FWHM) may be considered (highly) collimated light source light. Optics may be used to provide (high) collimation (see also above). The term “solid state material laser”, and similar terms, may refer to a solid state laser like based on a crystalline or glass body doped with ions, like transition metal ions 2024PF80129 55 and / or lanthanide ions, to a fiber laser, to a photonic crystal laser, to a semiconductor laser, such as e.g. a vertical cavity surface-emitting laser (VCSEL), etc. The term “solid state light source”, and similar terms, may especially refer to semiconductor light sources, such as a light emitting diode (LED), a laser diode, or a superluminescent diode. Instead of the term “solid state light source” also the term “semiconductor-based light source” may be applied. Hence, the term “semiconductor-based light source” may e.g. refer to one or more of a light emitting diode (LED), a laser diode, and a superluminescent diode. Hence, the light generating device may comprise one or more of a light emitting diode (LED), a laser diode, and a superluminescent diode. A light-emitting diode (LED) 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 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. 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 2024PF80129 56 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 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 (entertainment) moving head lighting device, a spot light (e.g. in retail or entertainment), an automotive lighting device, an outdoor lighting device, an architectural lighting device, 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 2024PF80129 57 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. 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 and 3 schematically depict some embodiments of the light generating system. Figs.2 and 4 further schematically depicts some aspects of the invention. Fig.5 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 depicts a light generating system 1000 comprising a first light generating device 110, a second light generating device 120, a luminescent material 200, a diffuser assembly 700, optical elements 500 comprising a first redirection optical element 1510, and a light exit 1090. In embodiments, the first light generating device 110 may be configured to generate first device light 111. Further, in embodiments, the first light generating device 110 may comprise a first solid-state light source 10. The first light generating device 110 may, in embodiments, have a first maximum optical power (P1). Similarly, in embodiments, the second light generating device 120 may be configured to generate second device light 121. Further, in embodiments, the second light generating device 120 may comprise a second solid-state light source 20. In further embodiments, the first solid state light source 10 and the second solid state light source 20 may be individually selected from the group comprising laser diodes, superluminescent diodes, and stacked multi-junction light-emitting diodes. 2024PF80129 58 Furthermore, similarly to the first light generating device 110, the second light generating device 120 may, in embodiments, have a second maximum optical power (P2). However, in embodiments, one of the first maximum optical power (P1) and the second maximum optical power (P2) may be larger than the other one of the first maximum optical power (P1) and the second maximum optical power (P2). Hence, in embodiments, P1 / P2≥1.05. Alternatively, in embodiments, P2 / P1≥1.05. Furthermore, in embodiments, the first light generating device 110 and the second light generating device 120 may, in the first operational mode of the light generating system 1000, be operated at an optical power selected from the range of 75-100% of their respective maximum optical power (i.e. P1 / P2). Furthermore, in embodiments, the luminescent material 200 may be configured downstream of (both) the first light generating device 110 and the second light generating device 120. Especially, in embodiments, the luminescent material 200 may be configured to convert at least part of the first device light 111 received by the luminescent material 200 and at least part of the second device light 121 received by the luminescent material 200 into luminescent material light 201. Analogously, in embodiments, the diffuser assembly 700 may be configured downstream of (both) the first light generating device 110 and the second light generating device 120. In embodiments, the diffuser assembly 700 may comprise a diffuser 710 (configured downstream of (both) the first light generating device 110 and the second light generating device 120). Especially, in embodiments, the diffuser 710 may be configured to diffuse at least part of the first device light 111 received by the diffuser 710 and at least part of the second device light 121 received by the diffuser 710 into diffused device light 711. As depicted e.g. in Figs.1 and 3, in embodiments, the diffuser 710 may be configured in the reflective mode. Alternatively, in embodiments (not depicted), the diffuser 710 (and optionally the luminescent material 200) may be configured in the transmissive mode. With the diffuser 710 configured in the reflective mode, in embodiments, the optical elements 500 may comprise an additional polarizing beam splitter (e.g. a second redirection optical element 1520 as depicted in Fig.1, or a fourth redirection optical element 1540 as depicted in Fig.3) configured in an optical path between the first redirection optical element 1510 and the diffuser assembly 700. As such, in embodiments, the additional polarizing beam splitter may be configured to separate (or direct into different optical paths) the device light 101 from the diffused device light 711. Especially, in embodiments, the additional polarizing beam splitter (i.e. the second redirection optical element 1520 as depicted in Fig.1) may be configured to transmit the device light 101 (comprising the first linear polarization) in an 2024PF80129 59 optical path to the diffuser 710 and to reflect the diffused device light 711 (comprising the second linear polarization) in an optical path to the light exit 1090. Alternatively, in embodiments, the additional polarizing beam splitter (i.e. the second redirection optical element 1520 as depicted in Fig.1) may be configured to reflect the device light 101 (comprising the first linear polarization) in an optical path to the diffuser 710 and to transmit the diffused device light 711 (comprising the second linear polarization) in an optical path to the light exit 1090. Moreover, in embodiments, the optical elements 500 may comprise one or more redirection optical elements 1500, at least comprising the first redirection optical element 1510. In embodiments, the first redirection optical element 1510 may be configured in a light-receiving relationship with the first light generating device 110 and the second light generating device 120. Furthermore, in embodiments as depicted here, the first redirection optical element 1510 may be configured to receive first device light 111 and second device light 121 along orthogonal optical paths. However, this may not necessarily be the case. In embodiments, the first redirection optical element 1510 may be at least partially transmissive for first device light 111 and second device light 121. Additionally, in embodiments, the first redirection optical element 1510 may be at least partially reflective for first device light 111 and second device light 121. Furthermore, in embodiments, the first redirection optical element 1510 may be configured to direct in a first operational mode of the light generating system 1000 a first part of device light 101a (comprising at least part of the first device light 111 and at least part of the second device light 121) in an optical path to the luminescent material 200. Additionally, in such embodiments, the first redirection optical element 1510 may be configured to direct in the first operational mode of the light generating system 1000 a second part of device light 101b (comprising at least another part of the first device light 111 and at least another part of the second device light 121) in an optical path to the diffuser assembly 700. Furthermore, in embodiments, the optical elements 500 may be configured to direct the luminescent material light 201 and the diffused device light 711 in an optical path to the light exit 1090. Therefore, the redirection optical elements 1500 may especially comprise a second redirection optical element 1520. In embodiments, the second redirection optical element 1520 may comprises (at least) a dichroic beam combiner configured to transmit or reflect light received by the second redirection optical element 1520 in dependence of its spectral power distribution. The second redirection optical element 1520 may be configured in a light-receiving relationship with (both) the luminescent material 200 2024PF80129 60 and the diffuser assembly 700. Especially, in embodiments (not depicted), the second redirection optical element 1520 may be configured to transmit the luminescent material light 201 in an optical path towards the light exit 1090. Additionally, in such embodiments, the second redirection optical element 1520 may be configured to reflect the diffused device light 711 in an optical path towards the light exit 1090. However, in alternative embodiments (as depicted here), the second redirection optical element 1520 may be configured to reflect the luminescent material light 201 in an optical path towards the light exit 1090. Additionally, in such embodiments, the second redirection optical element 1520 may be configured to transmit the diffused device light 711 in an optical path towards the light exit 1090. In embodiments, the light generating system 1000 may thus be configured to generate, in the first operational mode of the light generating system 1000, system light 1001. Especially, in embodiments, the system light 1001 may comprise at least part of the luminescent material light 201 and at least part of the diffused device light 711. In embodiments, the optical elements 500 may further comprise one or more of condensing and / or collimating optics 560, and one or more optical integrators 570. Especially, condensing and / or collimating optics 560 may be configured at one or more positions selected from: (i) in an optical path between the first redirection optical element 1510 (via the second redirection optical element 1520) and the luminescent material 200, (ii) in an optical path between the first redirection optical element 1510 and the diffuser 710, and (iii) upstream of the light exit 1090 and downstream of the second redirection optical element 1520. Further, in embodiments, optical integrators 570 may be configured at one or more positions selected from: (i) in an optical path between the first redirection optical element 1510 and the diffuser assembly 700, (ii) in an optical path between the first redirection optical element 1510 and the luminescent material 200, and (iii) in an optical path between the second redirection optical element 1520 and the light exit 1090. Alternatively, in embodiments, integrating optics 570 may be configured upstream of the redirection optical elements 1510,1520,1540 and downstream of any light generating device (such as upstream of the first redirection optical element 1510 and downstream of the first light generating device 110, as well as upstream of the first redirection optical element 1510 and downstream of the second light generating device 120). Furthermore, in embodiments, the light generating system 1000 may comprise a control system 300. The control system 300 may, in embodiments, be configured to control a spectral power distribution of the system light. Especially, in embodiments, the control system may be configured to control the spectral power distribution of the system light by 2024PF80129 61 controlling a spatial configuration of the first redirection optical element 1510, the first solid state light source 10, and the second solid state light source 20, see also further below. As depicted in Fig.2, in embodiments, the first light generating device 110 may comprise a first laser bank 1100 comprising n first lasers 1110. In such embodiments, n may be selected from the range of 2-36(, especially from the range of 4-28). Analogously, in embodiments, the second light generating device 120 may comprise a second laser bank 1200 comprising m second lasers 1220. In such embodiments, m may be selected from the range of 2-36(, especially from the range of 4-28). In specific embodiments, n≠m. Further, in embodiments, the first redirection optical element 1510 may have a total reflectance (R) for (first and second) device light 101(,111,121). In embodiments, the total reflectance (R) may be selected from the range of 10-90 %. Furthermore, in embodiments such as depicted in Fig.1, a relative optical power (PR,lm) directed towards the luminescent material 200 may be defined by PR,lm=(R*P2+ (1-R)*P1) / (P2+P1). Similarly, in embodiments such as depicted in Fig.1, a relative optical power (PR,da) provided to the diffuser assembly 700 may be defined by PR,da=(R*P1+ (1-R)*P2) / (P2+P1). In an operational mode of the light generating system 1000, in embodiments, a ratio PR,da / PR,lm may be selected from the range of 0.1-0.65. Yet further, as depicted in Fig.3, in embodiments, the light generating system 1000 may comprise a third light generating device 130 configured to generate third device light 131. The third light generating device 130 may therefore comprise a third solid-state light source 30. In embodiments, the third solid-state light source 30 may be selected from the group comprising laser diodes, superluminescent diodes, and stacked multi-junction light- emitting diodes. In embodiments, the luminescent material 200 may be configured in a light- receiving relationship (optionally via one or more optical elements 500) with the third light generating device 130. As such, in embodiments, the luminescent material 200 may be configured to convert third device light 131 received by the luminescent material 200 into luminescent material light 201. As the luminescent material 200 may be configured in a light-receiving relationship with the third light generating device 130, in embodiments, the optical elements 500 may comprise a third redirection optical element 1530. The third redirection optical element 1530 may especially (as depicted here) be configured to transmit the third device light 131 and reflect the first part of device light 101a (received by the third redirection optical element 1530) in an optical path to the luminescent material 200. Alternatively, in 2024PF80129 62 embodiments (not depicted), the third redirection optical element 1530 may be configured to reflect the third device light 131 and transmit the first part of device light 101a (received by the third redirection optical element 1530) in an optical path to the luminescent material 200. Therefore, in embodiments, the third redirection optical element 1530 may be configured in a light-receiving relationship with the first redirection optical element 1510 and the third light generating device 130. Furthermore, in embodiments, the third redirection optical element 1530 may be configured to redirect the light received by the third redirection optical element in dependence of its polarization and / or its spatial distribution (or configuration). In other words, the third redirection optical element 1530 may comprise a (second) polarizing beam splitter, a spectral beam splitter, or a geometric beam combiner. Furthermore, in embodiments, the light generating system 1000 may comprise a fourth redirection optical element 1540. As depicted here in Fig.3, in embodiments, the fourth redirection optical element 1540 may comprise a polarization-based redirection optical element. The fourth redirection optical element 1540 may, in embodiments, be configured to (i) transmit (not depicted) or reflect (depicted here) the device light 101 received by the fourth redirection optical element 1540 in an optical path to the diffuser assembly 700, and (ii) to transmit (depicted here) or reflect (not depicted) the diffused device light 711 received by the fourth redirection optical element 1540 in an optical path to the diffuser assembly 700. The fourth redirection optical element 1540 may especially be configured in a light-receiving relationship with the first redirection optical element 1510. In such embodiments, the diffuser 710 may comprise a polarization maintaining diffuser 710. Furthermore, in such embodiments, the diffuser assembly 700 may comprise a polarization converter 720, such as e.g. a quarter waveplate. The polarization converter 720 may especially be configured in an optical path between (relative to the propagation of light through the system 1000) the redirection optical elements 1500 and the diffuser 710. Especially, as depicted here, the fourth redirection optical element 1540 may thus be configured to direct (first and second) device light 101 received by the fourth redirection optical element 1540 and comprising (either) the first linear polarization or the second linear polarization (optionally via optics 500) to the polarization converter 720 (i.e. the quarter waveplate). The polarization converter 720 may, in embodiments, be configured to convert device light 101 received by the polarization converter 720 having a linear polarization into device light 101 having a (first) circular polarization. At the diffuser 710, in embodiments, the device light 101 having the (first) circular polarization may be diffused into diffused device light 711 having a second circular polarization. Therefore, in 2024PF80129 63 embodiments, the polarization converter 720 may also be configured to convert diffused device light 711 received by the polarization converter 720 (via the diffuser 710) and having the (second) circular polarization into diffused device light 711 having a linear polarization. In specific embodiments, in an operational mode of the light generating system 1000, one or more of the first device light 111 and the second device light 121, and optionally the third device light 131 may have a wavelength selected from the wavelength range of 430-490 nm. Hence, in embodiments, one or more of the first device light 111 and the second device light 121, and optionally the third device light 131 may be blue light. However, in alternative embodiments, the first device light 111, the second device light 121, and optionally the third device light 131 may have any wavelength, especially any wavelength selected from the visible wavelength range (380-780 nm). For example, in embodiments, the first device light 111 may have especially any wavelength selected from the visible wavelength range. In such embodiments, the first redirection optical element 1510 may further especially comprise a dichroic coating configured to transmit device light 101 having a wavelength in at least part of the excitation band of the luminescent material 200 and reflect device light 101 having a wavelengths outside (at least part of) the excitation band of the luminescent material 200. In embodiments, in an operational mode of the light generating system 1000, the system light 1001 may therefore be white light. Especially, in embodiments, the system light may be white light having a correlated color temperature selected from the range of 2000-12000 K and a color rendering index of at least 65. For example, in embodiments, to reach an output with a CCT of 8000K, a (yellow) luminescent material light 201 to (blue) diffused device light 711 power ratio of about 2:1 may be required in the system light spectrum. In known configurations similar to the configuration depicted here, the maximum power out of the second light generating device 120 may be used, whereas the other light generating devices may be driven at 80% of their maximum power. The reached output system light may in such a case be close to 34 klm. By placing the first redirection optical element 1510 as is the case for the light generating system 1000 of the invention, having a 85% transmission, all light generating devices may be driven at their maximum output, resulting in a system light output close to 37 klm at 8000K. Color tunability of the light generating system 1000 may be achieved by decreasing or increasing the output power of second light generating device 120, or through movement of the first redirection optical element 1510 by the movement element 310. Furthermore, in embodiments, the light generating system may comprise a rotating element 1250. In embodiments, one or more of the luminescent material 200 and the 2024PF80129 64 diffuser 710 (such as both, as depicted in fig.3) may be configured on the rotating element 1250. Further, in embodiments (not depicted), the light generating system 1000 may comprise multiple rotating elements 1250, such that the luminescent material 200 and the diffuser 710 may each be configured on a separate rotating element 1250. The rotating element 1250 may for example comprise a (phosphor or diffuser) wheel or a rotating rod. As depicted in Fig.4, in embodiments, the first redirection optical element 1510 may (alternatively) comprise a patched (partial) mirror 1515. In such embodiments, the patched mirror 1515 may comprise one or more first patches 1511 having a first reflectance (R1) and a first transmittance (T1), and one or more second patches 1512 having a second reflectance (R2) and a second transmittance (T2). Especially, in embodiments, R1 / R2≥1.05 or R2 / R1≥1.05. Furthermore, in such embodiments, at least one of the first redirection optical element 1510, the first solid state light source 10, and the second solid state light source 20 may be movable. Therefore, the light generating system 1000 may comprise a movement element 320 (such as an actuator) configured to move at least one of the first redirection optical element 1510, the first light generating device 110, and the second light generating device 120 relative to at least another one of the first redirection optical element 1510, the first light generating device 110, and the second light generating device 120. The control system 300 may, in embodiments, be configured to control one or more of (i) the color point of the system light 1001, the luminous flux of the system light 1001, (iii) the color rendering index (CRI) of the system light 1001, and (iv) the correlated color temperature (CCT) of the system light 1001 by controlling the movement element 320. Especially, in embodiments, the movement element 320 may be configured to move the first redirection optical element 1510 relative to the first light generating device 110 and the second light generating device 120. Additionally or alternatively, in embodiments, the movement element 320 may be configured to move the first light generating device 110 relative to the first redirection optical element 1510. Yet additionally or alternatively, in embodiments, the movement element 320 may be configured to move the second light generating device 120 relative to the first redirection optical element 1510. Furthermore, as depicted here, the first light generating device 110 may comprises a first arrangement 1010 comprising a plurality of first lasers 1110 having a first arrangement pitch (p1). Similarly, as depicted here, the second light generating device 120 may comprise a second arrangement 1020 comprising a plurality of second lasers 1220 having a second arrangement pitch (p2). Furthermore, in embodiments, the patched mirror 2024PF80129 65 1515 may comprise a plurality of first patches 1511 and a plurality of second patches 1512 having a third pitch (p3). In embodiments, p1=n1*p3, wherein n1 may be selected from at least 1. Additionally or alternatively, in embodiments, p2=n2*p3, wherein n2 may be selected from at least 1. For example, in embodiments as depicted here in Fig.4, p1=p2=p3, i.e., n1=1 and n2=1. Alternatively, in embodiments (not depicted), wherein the patches 1511,1512 are configured perpendicular to the patches 1511,1512 depicted in Fig.4, p1=SQRT(2)*p3 and p2=SQRT(2)*p3. Hence, in such embodiments, n1=SQRT(2) and n2=SQRT(2). Other examples may be clear to the skilled person. Especially, in embodiments, the third pitch p3 may complement one or both of the first arrangement pitch p1 and the second arrangement pitch p2. In embodiments, the light generating system 1000 especially be configured such that x% of the first maximum optical power (P1) may be incident on the first patches 1511 and 100-x% of the first maximum optical power (P1) may be incident on the second patches 1512. Here, x may be selected from the range of 0-100. Analogously, in embodiments, the light generating system 1000 especially be configured such that y% of the second maximum optical power (P2) may be incident on the first patches 1511 and 100-y% of the second maximum optical power (P2) may be incident on the second patches 1512. Here, y may be selected from the range of 0-100. Now a first device light effective reflectance (R1eff) may be defined as R1eff= (x / 100*R1)+(1-x / 100)*R2, whereas a second device light effective reflectance (R2eff) may be defined as R2eff = (y / 100*R1)+(1-y / 100)*R2. As a result, a luminescent optical power (Plm) (of the first part of the device light 101a) propagating in an optical path to the luminescent material 200 may be defined as PLM=(1-R1eff)*P1+R2eff*P2. Analogously, a diffuser optical power (PDA) (of the second part of the device light 101b) propagating in an optical path to the diffuser assembly 700 may be defined as PDA=R1eff*P1+(1-R2eff)*P2. In embodiments, in an operational mode of the light generating system 1000, a ratio PDA / PLMmay be selected from the range of 0.1-0.65. Fig.5 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.5 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.5 schematically depicts 2024PF80129 66 embodiments of a lighting device 1200 selected from the group of a lamp 1, a luminaire 2, a projector device 3, a stage lighting device, a spot light (e.g. in retail or entertainment), an automotive lighting device, an outdoor lighting device, an architectural lighting device, a search light, 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” and similar phrases may relate to one or more of item 1 and item 2. The term "comprising" may in an embodiment refer to "consisting of" but may in another embodiment also refer to "containing at least the defined species and optionally one or more other species". Furthermore, the terms first, second, third and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein. The devices, apparatus, or systems may herein amongst others be described during operation. As will be clear to the person skilled in the art, the invention is not limited to methods of operation, or devices, apparatus, or systems in operation. 2024PF80129 67 It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Use of the verb "to comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise”, “comprising”, and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of “including, but not limited to”. The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a device claim, or an apparatus claim, or a system claim, enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain measures are 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

2024PF80129 68 CLAIMS:

1. A light generating system (1000) comprising a first light generating device (110), a second light generating device (120), a luminescent material (200), a diffuser assembly (700), optical elements (500) comprising a first redirection optical element (1510), and a light exit (1090), wherein: - the first light generating device (110) is configured to generate first device light (111), wherein the first light generating device (110) comprises a first solid-state light source (10); the second light generating device (120) is configured to generate second device light (121), wherein the second light generating device (120) comprises a second solid-state light source (20); wherein the first solid state light source (10) and the second solid state light source (20) are individually selected 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 the first device light (111) received by the luminescent material (200) and at least part of the second device light (121) received by the luminescent material (200) into luminescent material light (201); - the diffuser assembly (700) comprises a diffuser (710); wherein the diffuser (710) is configured to diffuse at least part of the first device light (111) received by the diffuser (710) and at least part of the second device light (121) received by the diffuser (710) into diffused device light (711); - the optical elements (500) comprise one or more redirection optical elements (1500), at least comprising the first redirection optical element (1510); wherein the first redirection optical element (1510) is configured in a light-receiving relationship with the first light generating device (110) and the second light generating device (120) via orthogonal optical paths; wherein the first redirection optical element (1510) is at least partially transmissive for first device light (111) and second device light (121) and at least partially reflective for first device light (111) and second device light (121); wherein the first redirection optical element (1510) is configured to (i) direct in a first operational mode of the light generating system (1000) a first part of device light (101a), comprising at least part of the first device light (111) and at least part of the second device light (121), in an optical path2024PF80129 69 to the luminescent material (200), and to (ii) direct in the first operational mode of the light generating system (1000) a second part of device light (101b), comprising at least another part of the first device light (111) and at least another part of the second device light (121), in an optical path to the diffuser assembly (700); the optical elements (500) are further configured to direct the luminescent material light (201) and the diffused device light (711) in an optical path to the light exit (1090); - the light generating system (1000) is configured to generate in the first operational mode of the light generating system (1000) system light (1001) comprising at least part of the luminescent material light (201) and at least part of the diffused device light (711); - the first light generating device (110) has a first maximum optical power (P1), wherein the second light generating device (120) has a second maximum optical power (P2); wherein P1 / P2≥1.25 or P2 / P1≥1.25; and - the first redirection optical element (1510) has a total reflectance (R) for device light (101), wherein the total reflectance (R) is selected from the range of 10-90 %; wherein a relative optical power (PR,lm) directed towards the luminescent material (201) is defined by PR,lm=(R*P2+ (1-R)*P1) / (P2+P1); wherein a relative optical power (PR,da) provided to the diffuser assembly (700) is defined by PR,da=(R*P1 + (1-R)*P2) / (P2+P1); and wherein a ratio PR,da / PR,lmis selected from the range of 0.1-0.

95.

2. The light generating system (1000) according to claim 1, wherein P1 / P2≥1.50 or P2 / P1≥1.

50.

3. The light generating system (1000) according to any one of the preceding claims, wherein the first light generating device (110) comprises a first laser bank (1100) comprising n first lasers (1110), wherein n is selected from the range of 2-36; wherein the second light generating device (120) comprises a second laser bank (1200) comprising m second lasers (1220), wherein m is selected from the range of 2-36; wherein the first light generating device (110) and the second light generating device (120) in the first operational mode of the light generating system (1000) are operated at an optical power selected from the range of 75-100% of their respective maximum optical power; and wherein n≠m.

4. The light generating system (1000) according to claim 2, wherein the ratio PR,da / PR,lmis selected from the range of 0.2-0.8.2024PF80129 70 5. The light generating system (1000) according to any one of the preceding claims 1-3, wherein the first redirection optical element (1510) comprises a patched mirror (1515), wherein the patched mirror (1515) comprises one or more first patches (1511) having a first reflectance (R1) and a first transmittance (T1), and one or more second patches (1512) having a second reflectance (R2) and a second transmittance (T2); wherein R1 / R2≥1.05 or R2 / R1≥1.05; wherein at least one of the first redirection optical element (1510), the first solid state light source (10), and the second solid state light source (20) is movable; wherein the light generating system (1000) further comprises a control system (300), wherein the control system (300) is configured to control a spectral power distribution of the system light by controlling a spatial configuration of the first redirection optical element (1510), the first solid state light source (10), and the second solid state light source (20).

6. The light generating system (1000) according to claim 5, wherein the first light generating device (110) has a first effective optical power (P1eff), wherein the second light generating device (120) has a second effective optical power (P2eff) wherein the light generating system (1000) is configured such that: - (i) x% of the first effective optical power (P1eff) is incident on the first patches (1511) and 100-x% of the first effective optical power (P1eff) is incident on the second patches (1512), wherein x is selected from the range of 0-100; - (ii) y% of the second effective optical power (P2eff) is incident on the first patches (1511) and 100-y% of the second effective optical power (P2eff) is incident on the second patches (1512), wherein y is selected from the range of 0-100; - (iii) a first device light effective reflectance (R1eff) is defined as R1eff= (x / 100*R1)+(1-x / 100)*R2; - (iv) a second device light effective reflectance (R2eff) is defined as R2eff= (y / 100*R1)+(1-y / 100)*R2; - (v) a luminescent optical power (PLM) propagating in an optical path to the luminescent material (200) is defined as PLM=(1-R1eff)* P1eff +R2eff* P2eff; - (vi) a diffuser optical power (PDA) propagating in an optical path to the diffuser assembly (700) is defined as PDA=R1eff* P1eff +(1-R2eff)* P2eff; and - (vii) a ratio PDA / PLMis selected from the range of 0.1-0.65.2024PF80129 71 7. The light generating system (1000) according to any one of the preceding claims 5-6, wherein: - the light generating system (1000) comprises a movement element (320) configured to move at least one of the first redirection optical element (1510), the first light generating device (110), and the second light generating device (120) relative to at least another one of the first redirection optical element (1510), the first light generating device (110), and the second light generating device (120); - the control system (300) is configured to control one or more of (i) the color point of the system light (1001), the luminous flux of the system light (1001), (iii) the color rendering index (CRI) of the system light (1001), and (iv) the correlated color temperature (CCT) of the system light (1001) by controlling the movement element (320).

8. The light generating system (1000) according to any one of the preceding claims 5-7, wherein the control system (300) is configured to control the spatial configuration of the first redirection optical element (1510), the first solid state light source (10), and the second solid state light source (20) such that: (i) in an operational mode of the light generating system (1000) the system light (1001) has a first correlated color temperature (CCT1), and (ii) in another operational mode of the light generating system (1000) the system light (1001) has a second correlated color temperature (CCT2); and wherein CCT2- CCT1≥500 K.

9. The light generating system (1000) according to any one of the preceding claims 5-8, wherein the first light generating device (110) comprises a first arrangement (1010) comprising a plurality of first lasers (1110) having a first arrangement pitch (p1); wherein the second light generating device (120) comprises a second arrangement (1020) comprising a plurality of second lasers (1220) having a second arrangement pitch (p2); wherein the patched mirror (1515) comprises a plurality of first patches (1511) and a plurality of second patches (1512) having a third pitch (p3); wherein the third pitch (p3) complements (both) the first arrangement pitch (p1) and the second arrangement pitch (p2).

10. The light generating system (1000) according to any one of the preceding claims, wherein the optical elements (500) comprise a second redirection optical element (1520), wherein the second redirection optical element (1520) comprises a dichroic beam combiner configured to transmit or reflect light received by the second redirection optical2024PF80129 72 element (1520) in dependence of its spectral power distribution; wherein the second redirection optical element (1520) is configured in a light-receiving relationship with the luminescent material (200) and the diffuser assembly (700), wherein the second redirection optical element (1520) is configured to (i) transmit the luminescent material light (201) in an optical path towards the light exit (1090) and reflect the diffused device light (711) in an optical path towards the light exit (1090), or (ii) reflect the luminescent material light (201) in an optical path towards the light exit (1090) and transmit the diffused device light (711) in an optical path towards the light exit (1090).

11. The light generating system (1000) according to any one of the preceding claims, wherein: - the light generating system (1000) comprises a third light generating device (130) configured to generate third device light (131), wherein the third light generating device (130) comprises a third solid-state light source (30); wherein the third solid-state light source (30) is selected from the group comprising laser diodes, superluminescent diodes, and stacked multi-junction light-emitting diodes; and - the luminescent material (200) is configured in a light-receiving relationship with the third light generating device (130), wherein the luminescent material (200) is configured to convert third device light (131) received by the luminescent material (200) into luminescent material light (201).

12. The light generating system (1000) according to claim 11, wherein the optical elements (500) comprise a third redirection optical element (1530), wherein the third redirection optical element (1530) is configured in a light-receiving relationship with the first redirection optical element (1510) and the third light generating device (130); wherein the third redirection optical element (1530) is configured to (i) transmit the third device light (131) and reflect the first part of device light (101a) in an optical path to the luminescent material (200), or (ii) reflect the third device light (131) and transmit the first part of device light (101a) in an optical path to the luminescent material (200).

13. The light generating system (1000) according to any one of the preceding claims, wherein the optical elements (500) further comprise one or more optical integrators (570), wherein the optical integrators (570) are individually selected from the group comprising: a small-angle diffuser, a transmissive volume diffuser, a transmissive surface2024PF80129 73 diffuser, a reflective surface diffuser, a transmissive or reflective diffractive optical element, a transmissive holographic optical element, a single multi lens array, a double multi lens array such as a fly-eye lens array, and an integrating polygonal light pipe; and wherein (i) at least one optical integrator (570) is configured in an optical path between the light generating devices (100,110,120) and the luminescent material (200), and (ii) at least one optical integrator (570) is configured in an optical path between the light generating devices (100,110,120) and the diffuser assembly (700); and wherein the first redirection optical element (1510) is configured to receive first device light (111) and second device light (121) along orthogonal optical paths.

14. The light generating system (1000) according to any one of the preceding claims, wherein in an operational mode of the light generating system (1000) (i) one or more of the first device light (111) and the second device light (121), and optionally the third device light (131) as defined in claim 10, have a wavelength selected from the wavelength range of 430-490 nm, and (ii) the system light (1001) is white light having a correlated color temperature selected from the range of 2000-12000 K and a color rendering index of at least 65.

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

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