Laser combination configuration for obtaining white stage lighting without differential aging

Abstract

The invention provides a light generating system. The light generating system comprises a first light generating device, a second light generating device, a luminescent material, one or more diffusers, a main beam splitter, a dichroic beam splitter, a light outlet and a control system, wherein: (A) the first light generating device may include a plurality of first light generating devices configured to generate first device light having a first peak wavelength ([lambda] p1); (B) the second light generating device may include a plurality of second light generating devices configured to generate second device light having a second peak wavelength ([lambda] p2); wherein 0 nm < = lambda p1-lambda p2 < = 15 nm; (C) the luminescent material may be configured to (a) convert at least a portion of the first device light to luminescent material light produced by the first device light, and (b) convert at least a portion of the second device light to luminescent material light produced by the second device light; (D) the light generating system may be configured such that the first device light and the second device light received by the main beam splitter may comprise polarized light; wherein the primary beam splitter may be configured to (a) direct a primary first portion of the first device light to the luminescent material and a secondary first portion of the first device light to at least one diffuser of the one or more diffusers, and (b) directing a primary second portion of the second device light to the luminescent material and a secondary second portion of the second device light to at least one of the one or more diffusers; (E) at least one diffuser of the one or more diffusers may be configured to convert at least a portion of the second first portion of the first device light into diffused light based on the first device light, and at least one diffuser of the one or more diffusers may be configured to convert at least a portion of a secondary second portion of the second device light into diffused light based on the second device light; (F) the light generating system may be configured to generate system light comprising one or more of (a) first device light generated system light comprising at least a portion of diffused light based on the first device light and at least a portion of luminescent material light generated by the first device light, and (b) second device light generated system light comprising at least a portion of diffused light based on the second device light and at least a portion of luminescent material light generated by the second device light. The second device light comprises at least a part of diffused light based on the second device light and at least a part of luminescent material light generated by the second device light; wherein system light generated by the first device light and the second device light is white light; and (G) a control system may be configured to control the first light generating device and the second light generating device.

Description

Technical Field

[0001] This invention relates to a light generating system. It also relates to lighting devices including a light generating system. Background Technology

[0002] Stage lighting equipment based on laser phosphors is known in the art. For example, WO2022143318 describes a light-emitting device comprising a first light source, a second light source, a dichroic mirror, a wavelength conversion device, a first optical path adjustment device or a second optical path adjustment device, and a first scattering optical system. The light mixing effect of the emitted light can be improved by using the first scattering optical system. All the light emitted by the first light source is used to excite the wavelength conversion device. Summary of the Invention

[0003] High-brightness light sources can be used in a variety of applications, including spotlights, stage lighting, headlamps, home and office lighting, and automotive lighting. Stage lighting equipment uses high-brightness, extremely cool white light sources, such as discharge lamps. Alternatively, for this purpose, laser-phosphor technology can be used, in which a laser provides the lasing light and a remote phosphor converts the lasing light into converted light. A relatively straightforward method of generating white light using a laser is to combine a (blue) laser with a (yellow) phosphor to produce phosphor-converted light. Laser-phosphor systems can allow the generation of high-brightness light and can therefore be used in projection systems, including displays such as cinema projectors and projectors for home, school, and office applications, automotive headlights, searchlights, stage lighting, architectural lighting, and special lighting applications. The combination of pump light and emitted light can be achieved using a polarizing beamsplitter for the pump light, through which part of the light is reflected to the emitting material and part is transmitted to a diffuser. However, diffused light can often be largely depolarized, which can lead to relatively high losses in diffused blue light at the beam combiner, where it combines with the emitted light to form white output light. Therefore, improving the performance of stage lighting equipment may be desirable. Furthermore, phosphors in laser-phosphor lighting systems may suffer from efficiency degradation. Efficiency degradation in phosphors is a phenomenon that describes their tendency to lose efficiency as luminous flux increases due to excited-state upconversion losses. Moreover, such phosphors exhibit pump-related color shifts (e.g., for white LED lighting), where they exhibit differential efficiency degradation. Therefore, it is desirable to provide a light generation system with tunable color temperature and tunable spectral characteristics while limiting differential efficiency degradation.

[0004] Therefore, one aspect of the present invention is to provide an alternative light-generating system that preferably further eliminates at least partially one or more of the aforementioned disadvantages. The object of the present invention is to overcome or improve at least one disadvantage of the prior art, or to provide a useful alternative.

[0005] According to a first aspect, the present invention provides a light generation system comprising a first light generation device, a second light generation device, a light-emitting material, one or more diffusers, a main beam splitter, a dichroic beam splitter, a light outlet, and a control system. In an embodiment, the first light generation device may include a plurality of first light generation devices configured to generate light with a first peak wavelength (λ). p1 The first light generating device may include a first laser group comprising a plurality of first light generating devices. Specifically, in an embodiment, the first light generating device may include a first laser diode. In an embodiment, the second light generating device may include a plurality of second light generating devices configured to generate light with a second peak wavelength (λ). p2 The second light generating device may include a second laser array comprising a plurality of second light generating devices. Specifically, in an embodiment, the plurality of second light generating devices may include second laser diodes. Furthermore, in an embodiment, (Applicable). In an embodiment, the luminescent material can be configured to receive light from a first light-generating device and can be configured to convert at least a portion of the light from the first device into luminescent material light generated by the first device light. Additionally, in an embodiment, the luminescent material can be configured to receive light from a second light-generating device and can be configured to convert at least a portion of the light from the second device into luminescent material light generated by the second device light. Furthermore, in an embodiment, the light-generating system can be configured such that the first device light received by the main beam splitter can include polarized light, and the second device light received by the main beam splitter can include polarized light. Furthermore, in an embodiment, the main beam splitter can be configured to guide a primary first portion of the first device light to the luminescent material and guide a secondary first portion of the first device light to at least one of one or more diffusers. Additionally, in an embodiment, the main beam splitter can be configured to guide a primary second portion of the second device light to the luminescent material and guide a secondary second portion of the second device light to at least one of one or more diffusers. Furthermore, in an embodiment, the first dichroic beamsplitter may be configured to guide at least a portion of the first device light or at least a portion of the second device light to the main beamsplitter. Additionally, in an embodiment, the first dichroic beamsplitter may be configured to guide at least a portion of the luminescent material light to an auxiliary dichroic beamsplitter. Furthermore, in an embodiment, at least one of one or more diffusers may be configured to be in a light-receiving relationship with the first light-generating device. Accordingly, in an embodiment, at least one of one or more diffusers may be configured to convert at least a portion of a second portion of the first device light into diffuse light based on the first device light. Additionally, in an embodiment, at least one of one or more diffusers may be configured to be in a light-receiving relationship with the second light-generating device. Accordingly, in an embodiment, at least one of one or more diffusers may be configured to convert at least a portion of a second portion of the second device light into diffuse light based on the second device light. Furthermore, in an embodiment, the auxiliary dichroic beam splitter can be configured to guide (a) the luminescent material light generated by the first device light and the diffused light based on the first device light, and (b) the luminescent material light generated by the second device light and the diffused light based on the second device light, along the same optical path to the light outlet of the light generation system. Therefore, in an embodiment, the light generation system can be configured to generate system light comprising one or more of the following: (a) system light generated by the first device light, comprising at least partially diffused light based on the first device light and at least partially luminescent material light based on the first device light; and (b) system light generated by the second device light, comprising at least partially diffused light based on the second device light and at least partially luminescent material light based on the second device light. Specifically, in an embodiment, the system light generated by the first device light and the system light generated by the second device light can be white light.Furthermore, in embodiments, the control system can be configured to control the first light generating device and the second light generating device. Therefore, in embodiments, the present invention provides a light generating system comprising a first light generating device, a second light generating device, a light-emitting material, one or more diffusers, a main beam splitter, a dichroic beam splitter, a light outlet, and a control system; wherein: (i) the first light generating device may include a plurality of first light generating devices configured to generate light with a first peak wavelength (λ). p1 (ii) A first light generating device may include a first laser group, the first laser group including a plurality of first light generating devices; wherein the first light generating devices may include a first laser diode; (ii) a second light generating device may include a plurality of second light generating devices, the plurality of second light generating devices being configured to generate light having a second peak wavelength (λ). p2 The second light generating device may include a second laser group, which includes the plurality of second light generating devices; wherein the plurality of second light generating devices may include a second laser diode; and wherein 0 nm ≤ |λ p1 -λ p2|≤15 nm; (iii) the luminescent material can be configured to (a) be in a light-receiving relationship with the first light-generating device and can be configured to convert at least a portion of the first device light into luminescent material light generated by the first device light, and (b) be in a light-receiving relationship with the second light-generating device and can be configured to convert at least a portion of the second device light into luminescent material light generated by the second device light; (iv) the light-generating system can be configured such that the first device light received by the main beam splitter can include polarized light and the second device light received by the main beam splitter can include polarized light; wherein the main beam splitter can be configured to (a) convert the first device light into polarized light. (a) directing a portion of the light from the first device to the luminescent material and a secondary first portion of the light from the first device to at least one of the one or more diffusers; and (b) directing a primary second portion of the light from the second device to the luminescent material and a secondary second portion of the light from the second device to at least one of the one or more diffusers; (v) a first dichroic beam splitter may be configured to (a) direct at least a portion of the light from the first device or at least a portion of the light from the second device to the primary beam splitter, and (b) direct at least a portion of the light from the luminescent material to an auxiliary dichroic beam splitter; and (vi) at least one of the one or more diffusers may be configured to... The first light generating device is in a light receiving relationship and can be configured to convert at least a portion of a second portion of the first device light into diffuse light based on the first device light, and at least one of the one or more diffusers can be configured to be in a light receiving relationship with the second light generating device and can be configured to convert at least a portion of a second portion of the second device light into diffuse light based on the second device light; (vii) the auxiliary dichroic beam splitter can be configured to split (a) the luminescent material light generated by the first device light and the diffuse light based on the first device light, and (b) the luminescent material light generated by the second device light and the diffuse light based on the second device light. (viii) The light generation system can be configured to generate system light, which includes one or more of the following: (a) system light generated by a first device light, which includes diffuse light based on the first device light and luminescent material light generated by the first device light; and (b) system light generated by a second device light, which includes diffuse light based on the second device light and luminescent material light generated by the second device light; wherein the system light generated by the first device light and the system light generated by the second device light can be white light; and (ix) the control system can be configured to control the first light generation device and the second light generation device.

[0006] This system can provide a high-power light generation system. Specifically, high intensity, correlated color temperature (CCT) control, and high color rendering index (CRI) are possible with such a system. However, such a system can provide high-power light in a safe manner. The system can be relatively compact. Furthermore, the system can provide thermal management of the luminescent material. In addition to high light power, the system can also provide high emissivity (or brightness), i.e., high light power density of the source. Specifically, the laser combination configuration of the light generation system can provide (high-intensity) white stage lighting or other types of light with reduced differential aging or even no differential aging. Specifically, the luminescent material can be irradiated by the light from the first device and / or the light from the second device. Therefore, the luminescent material can experience the same degree (or amount) of efficiency degradation, i.e., the differential efficiency degradation between the two types of luminescent materials can be reduced. In this way, the shift in the color point and / or color rendering index (CRI) of the light generation system can be reduced.

[0007] In embodiments, the light generation system may therefore include a first light generation device, a second light generation device, a light-emitting material, one or more diffusers, a main beam splitter, a dichroic beam splitter, a light exit, and a control system. Embodiments of the different components of the light generation system will now be described in more detail.

[0008] In an embodiment, the first light generating device may include a first light generating element. Specifically, in an embodiment, the first light generating device may include a plurality of first light generating elements. Therefore, the term "first light generating element" and similar terms herein may also refer to "a plurality of first light generating elements." In an embodiment, the plurality of first light generating elements may be configured to generate first device light. Specifically, in an embodiment, the first device light may have a first peak wavelength (λ). p1 In an embodiment, the first peak wavelength (λ) p1 The wavelength can be specifically selected from the visible light wavelength range. However, in other embodiments, the first peak wavelength (λ) is... p1 The wavelength can also be selected from either the IR or UV wavelength range. In an embodiment, the first peak wavelength (λ) p1 The light source can be specifically selected from the 380-780 nm range, such as the 380-570 nm range, the 400-500 nm range, or the 440-490 nm range. Therefore, in some embodiments, the first device light can be blue light; however, this is not necessarily the case.

[0009] Furthermore, in embodiments, the first light generating device may include a first light source. In particular, the first light generating device may include a solid-state light source. Specifically, in embodiments, the first light generating device may include one of a light-emitting diode (LED), a laser diode, and a superluminescent diode. More specifically, in embodiments, (multiple) first light generating devices may include a first laser diode. In such embodiments, the first light generating apparatus may include a first laser group. Specifically, in embodiments, the first light generating apparatus may include multiple first light generating devices configured within a first laser group.

[0010] A laser array may include a light-emitting device comprising, for example, a (2D) array of multiple laser diodes arranged on a heat-conducting carrier, and optionally, a lens array having multiple collimating lenses corresponding to the laser diodes, such that each of the multiple laser diodes includes a collimating lens for collimating laser light emitted by the laser diode. In embodiments, the device may include a packaged architecture or a canned architecture. In the case of a packaged structure, the laser diode chip array is arranged on a heat-conducting carrier. Multiple electrodes may be present for electrically connecting the multiple laser diodes. In embodiments, the lasers in the laser array (or "laser array group") may in particular share the same optics. The laser array may also be used to increase input power.

[0011] Therefore, in embodiments, (a plurality of) first laser diodes can be configured (specifically arranged) in a first laser group. Furthermore, in embodiments, the plurality of first light generating devices may all include substantially the same first (solid-state) light source, particularly first light sources selected from the same chamber. However, in other embodiments, the plurality of first light generating devices may include different first (solid-state) light sources. Further embodiments of the light sources are described below.

[0012] Similarly, in embodiments, the second light generating device may include a second light generating element. Specifically, in embodiments, the second light generating device may include multiple second light generating elements. Therefore, the term "second light generating element" and similar terms may also refer to "multiple second light generating elements." In embodiments, the (multiple) second light generating elements may be configured to generate second device light. Specifically, in embodiments, the second device light may have a second peak wavelength (λ). p2 In the embodiment, the second peak wavelength (λ) p2 The second peak wavelength (λ) can be specifically selected from the visible light wavelength range. However, in other embodiments, the second peak wavelength (λ) is... p2 The second peak wavelength (λ) can also be selected from one of the IR and UV wavelength ranges. In an embodiment, the second peak wavelength (λ) p2The light source can be specifically selected from the 380-780 nm range, such as the 380-570 nm range, or the 400-500 nm range, such as the 440-490 nm range. Therefore, in some embodiments, the second device light can be blue light; however, this is not always the case.

[0013] Furthermore, in embodiments, the second light generating device may include a second light source. In particular, the second light generating device may include a solid-state light source. Specifically, in embodiments, the second light generating device may include one of a light-emitting diode (LED), a laser diode, and a superluminescent diode. More specifically, in embodiments, (multiple) second light generating devices may include second laser diodes. In such embodiments, the second light generating apparatus may include a second laser group (see also the above description of laser groups). Specifically, in embodiments, the second light generating device may include multiple second light generating devices configured in a second laser group. Therefore, in embodiments, (multiple) second laser diodes may be configured (specifically arranged) in a second laser group. Furthermore, in embodiments, multiple second light generating devices may all include substantially the same second (solid-state) light source, particularly second light sources selected from the same compartment. However, in other embodiments, multiple second light generating devices may include different second (solid-state) light sources.

[0014] In an embodiment, the first peak wavelength (λ) p1 ) and second peak wavelength (λ) p2 The first and second device lights can be chosen to be relatively close to each other, that is, the light from the first device and the light from the second device can have substantially the same color. Specifically, in the embodiment, 0 nm ≤ |λ p1 -λ p2 |≤30 nm, for example, 0 nm≤|λ p1 -λ p2 |≤15 nm, such as 2 nm≤|λ p1 -λ p2 |≤10 nm.

[0015] Both the first light-generating device and the second light-generating device can be configured to provide light to the light-emitting material. Therefore, in an embodiment, the light-emitting material can be configured to have a light-receiving relationship with the first light-generating device. Additionally or alternatively, in an embodiment, the light-emitting material can be configured to have a light-receiving relationship with the second light-generating device. In this way, in an embodiment, the light-emitting material can be configured to convert at least a portion of the first device light received by the light-emitting material into light-emitting material light generated by the first device light (i.e., light-emitting material light generated by the light-emitting material specifically due to the conversion of the first device light). Similarly, in an embodiment, the light-emitting material can be configured to convert at least a portion of the second device light received by the light-emitting material into light-emitting material light generated by the second device light (i.e., light-emitting material light generated by the light-emitting material specifically due to the conversion of the second device light).

[0016] The phrase “light received by…” and similar phrases, such as “device light received by a luminescent material”, can specifically indicate that an action can occur when light is actually received by an article. In embodiments, the action can be one or more of conversion, reflection, and transmission. Furthermore, the action may also include refraction. The phrase “converting at least a portion of device light received by a luminescent material into luminescent material light” and similar phrases can therefore indicate that when at least a portion of the device light does indeed irradiate the luminescent material (in the operating mode of the light-generating system), at least a portion of the device light can be converted into luminescent material light.

[0017] Specifically, in the embodiments, at least 60%, such as at least 70%, like at least 80%, specifically at least 90%, and more specifically at least 95%, of the first device light received by the luminescent material can be converted into luminescent material light generated by the first device light. Similarly, in the embodiments, at least 60%, such as at least 70%, like at least 80%, specifically at least 90%, and more specifically at least 95%, of the second device light received by the luminescent material can be converted into luminescent material light generated by the second device light.

[0018] In an embodiment, the light emitted by the luminescent material generated by the first device light and the light emitted by the luminescent material generated by the second device light (both) may have a spectral power distribution with an intensity of at least within the visible wavelength range.

[0019] The following describes some general aspects related to luminescent materials. The luminescent material is configured to convert at least a portion of a first radiation (selected from one or more of UV radiation and visible radiation) into luminescent material light. Specifically, in embodiments, the luminescent material may be configured to convert at least a portion of blue light (as radiation) into luminescent material light. Specifically, when blue light is partially converted, the blue light can serve as a blue light source (for device light) and excitation light that can be converted by the luminescent material. The first radiation may in particular be provided by a (solid-state) light source.

[0020] The term "luminescent material" specifically refers to a material capable of converting a first type of radiation (particularly one or more of UV and blue radiation) into a second type of radiation. Typically, the first and second radiations have different spectral power distributions. Therefore, the terms "luminescent converter" or "converter" may be used instead of "luminescent material." Furthermore, the term "phosphorescent material" may be used instead of "luminescent material." These terms are known to those skilled in the art. Typically, the second radiation has a spectral power distribution at wavelengths greater than the first radiation, which is the case in so-called down-conversion. However, in specific embodiments, the second radiation has a spectral power distribution with intensity at wavelengths smaller than the first radiation, which is the case in so-called up-conversion. In embodiments, "luminescent material" may specifically refer to a material capable of converting radiation into, for example, visible light and / or infrared light. For example, in embodiments, the luminescent material is capable of converting one or more of UV and blue radiation into visible light. In specific embodiments, the luminescent material may also convert radiation into infrared (IR) radiation. Therefore, when excited by radiation, the luminescent material emits radiation. Typically, the luminescent material will be a down-converter, i.e., radiation of a smaller wavelength is converted to radiation of a larger wavelength (λex < λem), although in specific embodiments, the luminescent material may include an up-converter luminescent material, i.e., radiation of a larger wavelength is converted to radiation of a smaller wavelength (λex > λem). In embodiments, the term "luminescence" may refer to phosphorescence. In embodiments, the term "luminescence" may also refer to fluorescence. Instead of the term "luminescence," the term "emission" may also be used. Thus, the terms "first radiation" and "second radiation" may refer to excitation radiation and emission (radiation), respectively. Similarly, the term "luminescent material" in embodiments may refer to phosphorescence and / or fluorescence. The term "luminescent material" may also refer to a variety of different luminescent materials. Examples of possible luminescent materials are shown below. Therefore, the term "luminescent material" in specific embodiments may also refer to a luminescent material composition. The term "luminescent material" as used herein may also refer to a material comprising a luminescent material, such as a light-transmitting body comprising a luminescent material.

[0021] In the embodiments, the luminescent material is selected from garnet and nitrides, specifically doped with trivalent cerium or divalent europium, respectively. The term "nitride" may also refer to nitrogen oxides or nitrogen silicates, etc. Alternatively or additionally, the luminescent material may be selected from silicates, specifically silicates doped with divalent europium.

[0022] In a specific embodiment, the luminescent material includes A3B5O. 12Ce-type luminescent materials, wherein A in embodiments comprises one or more of Y, La, Gd, Tb, and Lu, specifically (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. Specifically, A may comprise one or more of Y, Gd, and Lu, such as, for example, one or more of Y and Lu. Specifically, B may comprise one or more of Al and Ga, more specifically at least Al, such as substantially entirely Al. Therefore, a particularly suitable luminescent material is a cerium-containing garnet material. Examples of garnet particularly include A3B5O. 12 Garnet, wherein A comprises at least yttrium or lutetium, and wherein B comprises at least aluminum. This garnet may be doped with cerium (Ce), praseodymium (Pr), or a combination of cerium and praseodymium; however, it is specifically doped with Ce. Specifically, B comprises aluminum (Al), however, B may also partially comprise gallium (Ga) and / or scandium (Sc) and / or indium (In), specifically up to about 20% Al, more specifically up to about 10% Al (i.e., the B ion is substantially composed of more than 90 mol% Al and less than 10 mol% of one or more of Ga, Sc, and In); B may specifically comprise up to about 10% gallium. In another variant, B and O may be at least partially replaced by Si and N. Element A may be selected in particular from the group consisting of yttrium (Y), gadolinium (Gd), terbium (Tb), and lutetium (Lu). Furthermore, Gd and / or Tb are specifically present only in amounts up to about 20% of A. In a specific embodiment, the garnet luminescent material includes , where x is equal to or greater than 0 and equal to or less than 1. The term ":Ce" indicates that a portion of the metal ions in the luminescent material (i.e., in garnet: a portion of the "A" ions) are replaced by Ce. For example, in In this case, a portion of Y and / or Lu is replaced by Ce. This is known to those skilled in the art. Ce will generally replace no more than 10% of A; typically, the concentration of Ce (relative to A) is 0.1-4%, specifically 0.1-2%. Assuming 1% Ce and 10% Y, the perfectly correct molecular formula could be... Ce in garnet is essentially or only in the trivalent state, as is known to those skilled in the art.

[0023] In the embodiments, the luminescent material (therefore) includes In a specific embodiment, up to 10% of the BO can be replaced by Si-N.

[0024] In a specific embodiment, the luminescent material includes , where x1 + x2 + x3 = 1, where x3 > 0, where 0 < x2 + x3 ≤ 0.2, where y1 + y2 = 1, where 0 ≤ y2 ≤ 0.2, where A' includes one or more elements selected from the group consisting of lanthanide elements, and where B' includes one or more elements selected from the group consisting of Ga, In, and Sc. In an embodiment, x3 is selected from the range of 0.001 - 0.1. In the present invention, in particular, x1 > 0, such as > 0.2, e.g., at least 0.8. The garnet with Y can provide a suitable spectral power distribution.

[0025] In a specific embodiment, at most 10% of B - O can 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 a specific embodiment, B - O can refer to Al - O. As described above, in a specific embodiment, x3 can be selected from the range of 0.001 - 0.04. Specifically, such a luminescent material can have a suitable spectral distribution (however, see below), have a relatively high efficiency, have a relatively high thermal stability, and allow a high CRI (optionally in combination with light from other light sources as described herein). Thus, in a specific embodiment, A can be selected from the group consisting of Lu and Gd. Alternatively or additionally, B can include Ga. Thus, in an embodiment, the luminescent material includes , where Lu and / or Gd is available. Even more specifically, x3 is selected from the range of 0.001 - 0.1, where 0 < x2 + x3 ≤ 0.1, and where . Further, in a specific embodiment, at most 1% of B - O can be replaced by Si - N. Here, the percentage refers to the number of moles (as known in the art); also see, for example, EP3149108. In yet a further specific embodiment, the luminescent material includes , where x1 + x3 = 1, and where , such as 0.001 - 0.1.

[0026] In a specific embodiment, the light - generating device may only include a garnet - type luminescent material selected from those including cerium. In a further specific embodiment, the light - generating device includes a single type of luminescent material, such as . Thus, in a specific embodiment, the light - generating device includes a luminescent material, where at least 85 wt.%, even more specifically at least about 90 wt.%, such as even more specifically at least about 95 wt.% of the luminescent material includes Here, A' includes one or more elements selected from the group consisting of lanthanide elements, and B' includes one or more elements selected from the group consisting of Ga, In, and Sc, where x1 + x2 + x3 = 1, where x3 > 0, where 0 < x2 + x3 ≤ 0.2, where y1 + y2 = 1, and where 0 ≤ y2 ≤ 0.2. Specifically, x3 is selected from the range of 0.001 - 0.1. Note that in the examples, x2 = 0. Alternatively or additionally, in the examples, y2 = 0.

[0027] In a specific example, A can specifically include at least Y, and B can specifically include at least Al.

[0028] Alternatively or additionally, the luminescent material can include a type of luminescent material, where A includes one or more of Y, La, Gd, Tb, and Lu, such as one or more of La and Y in the examples.

[0029] The garnet - type luminescent material can also be described by an alternative molecular formula Here, A can include one or more of the following: (i) rare - earth ions, such as one or more selected from and (ii) divalent cations, such as . Here, B can include one or more of the following: (i) trivalent cations, such as and In 3+ and one or more of (ii) divalent cations, such as Mg 2+ and Mn 2+ . Here, C can include one or more of the following: (i) trivalent cations, such as Ga 3+ and Al 3+ and one or more of (ii) divalent cations, such as Mn 2+ , and (iii) tetravalent cations, such as Si 4+ and Ge 4+ and one or more of. Using these ions, the garnet crystal structure can be maintained. Other substitutions are also possible.

[0030] Specifically, the luminescent material can be an inorganic luminescent material, such as one or more of the above - mentioned trivalent cerium or divalent europium, including oxides, oxynitrides, or nitrides. Thus, the term "luminescent material" herein particularly refers to inorganic luminescent materials. Alternatively or additionally, other luminescent materials can also be applied. For example, quantum dots and / or organic dyes can be applied, and they can optionally be embedded in a transmissive matrix, such as a polymer, such as PMMA, or polysiloxane, etc.

[0031] Different luminescent materials can have different spectral power distributions of light from each luminescent material. Alternatively or additionally, these different luminescent materials can have different color points (or dominant wavelengths).

[0032] As described above, other luminescent materials are also possible. Therefore, in specific embodiments, the luminescent material is selected from the group consisting of: europium-containing nitrides, europium-containing oxynitrides, europium-containing silicates, cerium-containing garnets, and quantum structures. Quantum structures may, for example, include quantum dots or quantum rods (or other quantum-type particles) (see above). Quantum structures may also include quantum wells. Quantum structures may also include photonic crystals. Other embodiments of the luminescent material will be described in more detail below.

[0033] To facilitate the light-receiving relationship between the luminescent material and the light-generating device, the light-generating system may include a main beam splitter. In an embodiment, the main beam splitter may be configured in the optical path between the first light-generating device and the luminescent material. Additionally, in an embodiment, the main beam splitter may (also) be configured in the optical path between the second light-generating device and the luminescent material. Specifically, the main beam splitter may be configured upstream of the first and second light-generating devices and downstream of the luminescent material and one or more diffusers. The terms "upstream" and "downstream" refer to the arrangement of items or characteristics of the propagation of light from the light-generating devices (hereinforcingly the first and second light-generating devices), wherein a second position in the beam closer to the light-generating device is "upstream" relative to a first position within the beam from the light-generating device, and a third position in the beam further away from the light-generating device is "downstream".

[0034] In an embodiment, the main beam splitter may be specifically configured such that the first device light and the second device light can propagate from the first light generating device and the second light generating device, respectively, via the main beam splitter to at least the light-emitting material. Therefore, in an embodiment, the main beam splitter may include one or more of (i) a dichroic beam splitter (also hereinafter) and (ii) a polarization beam splitter.

[0035] In an embodiment, the polarization beamsplitter can be configured to transmit and / or reflect at least a portion of the device light based on its polarization. Specifically, for elliptically polarized device light, the angle between the polarization direction of the device light and the polarization axis of the polarization beamsplitter (also shown below) can determine the portion of the device light to be reflected (p-polarized) and the portion to be transmitted (s-polarized) (and vice versa).

[0036] Therefore, in embodiments, the polarization direction of the device light can be at an angle to the polarization direction of the polarization beamsplitter, as also described below. This angle can be achieved by rotating the light generating device or the individual lasers and polarization beamsplitter relative to each other. For example, in embodiments, during the production of the light generating system, the laser array can be at an angle relative to the polarization beamsplitter. In such embodiments, during the use of the light generating system, the angle, as well as the light generating device (especially the laser array) and the polarization beamsplitter, can be substantially fixed. However, this is not necessarily the case. For example, in other embodiments, during the use of the light generating system, the angle can be changed, thereby changing the light generating device (especially the laser array) and the polarization beamsplitter, as also described below.

[0037] In this embodiment, the main beam splitter may include a polarization beam splitter configured to separate light having wavelengths selected from the blue wavelength range (however, in other embodiments, this may also be a different wavelength range) based on the polarization of the light. In such an embodiment, light having wavelengths different from the blue wavelength range can be substantially transmitted by the polarization beam splitter. Specifically, the polarization beam splitter may be selected such that the luminescent material light generated by the first device light and / or the luminescent material light generated by the second device light are substantially transmitted.

[0038] Therefore, for a polarization beamsplitter, the following can be applied: for the first polarization, the transmittance can be higher than that for the second polarization, for example, at least 10%, at least 20%, or even at least 30%. Similarly, for the first polarization, the reflection can be lower than that for the second polarization, for example, at least 10%, at least 20%, or even at least 30%. Specifically, in embodiments, a dichroic beamsplitter can be configured to direct at least 60% of the first polarized light in a first direction and at least 60% of the second polarized light in a second direction, wherein, in embodiments, the directions can have mutual angles selected from the range of 45-135°, such as about 90°. The percentage of light can refer to spectral power (e.g., in watts). Specifically, the first and second polarizations can include linear polarizations such as those selected from s-polarization and p-polarization. Optionally, the first and second polarizations can be selected from different elliptically polarized light. In embodiments, the polarization beamsplitter described herein can be selected from a reflective polarization beamsplitter (reflective polarizer).

[0039] In embodiments, the main beamsplitter may optionally include a dichroic beam splitting function. In embodiments, the dichroic beamsplitter may be configured to transmit and / or reflect at least a portion of the device light according to its spectral power (rather than its polarization). Specifically, a dichroic beamsplitter may be selected such that the luminescent material light generated by the first device light and / or the luminescent material light generated by the second device light is substantially transmitted, and the device light may be substantially reflected. However, the opposite approach may be chosen, i.e., a dichroic beamsplitter may be selected such that the luminescent material light generated by the first device light and / or the luminescent material light generated by the second device light is substantially reflected, and the device light may be substantially transmitted, which is also possible in (other) embodiments.

[0040] Therefore, for a dichroic beam splitter, the following conditions can be met: for a first wavelength range, the average wavelength transmittance can be higher than that for a second wavelength range, for example, at least 10%, at least 20%, or even at least 30%. Similarly, for a first wavelength range, the average wavelength reflectance can be lower than that for a second wavelength range, for example, at least 10%, at least 20%, or even at least 30%. Specifically, in embodiments, the dichroic beam splitter can be configured to direct at least 60% of the light from the first wavelength range to a first direction and at least 60% of the light from the second wavelength range to a second direction, wherein in embodiments these directions can have an angle between each other selected from the range of 45-135°, for example, about 90°. The percentage of light can refer to spectral power (e.g., in watts).

[0041] Therefore, in embodiments, the main beam splitter may also include a beam splitter with combined dichroic and polarization beam splitting capabilities.

[0042] Therefore, in embodiments, the light generation system can be configured such that the first device light received by the main beam splitter can include polarized light. Similarly, in embodiments, the light generation system can be configured such that the second device light received by the main beam splitter can include polarized light. In embodiments, the (first and / or second) light generation devices can be configured to generate polarized (laser) light such that the device light received by the main beam splitter can include polarized light. In other embodiments, the light generation system can include one or more polarization control elements configured to change the first device light and / or the second device light to polarized first device light and / or polarized second device light, respectively. Specifically, in embodiments, the (first and / or second) device light can include linearly polarized light, i.e., one or more of p-polarized light and s-polarized light. Additionally or alternatively, in embodiments, the (first and / or second) device light can include elliptically polarized light, such as, for example, right-handed or left-handed circularly polarized light. The polarization of the first and second device light will be described in more detail below. In embodiments, the first and second device light can in particular include polarized light with controllable polarization. As a result, the main beam splitter can be configured to guide a portion of the light from the first and / or second device to the light-emitting material, and to guide other portions of the light from the first and / or second device to one or more diffusers, particularly according to the polarization of the respective first and / or second device light. Specifically, in an embodiment, the main beam splitter can be configured to guide a primary first portion of the first device light to the light-emitting material. Additionally or alternatively, in an embodiment, the main beam splitter can be configured to guide a secondary first portion of the first device light to at least one of the one or more diffusers. Similarly, in an embodiment, the main beam splitter can be configured to guide a primary second portion of the second device light to the light-emitting material. Additionally or alternatively, in an embodiment, the main beam splitter can be configured to guide a secondary second portion of the second device light to at least one of the one or more diffusers. In embodiments, the light generation system may be configured such that the following actions of the main beam splitter can occur simultaneously: (a) guiding a primary first portion of the first device light to the luminescent material and a secondary first portion of the first device light to at least one or more diffusers; and (b) guiding a primary second portion of the second device light to the luminescent material and a secondary second portion of the second device light to at least one or more diffusers. However, in other embodiments, the light generation system may be configured such that the previously indicated actions can occur separately from each other (e.g., individually, continuously, or only partially, see also below). Specifically, in embodiments, the actions occurring in the light generation system can be adjusted according to differential aging and / or pulse width modulation of the light generation apparatus.

[0043] In this document, the term “guiding X-rays to Y” and similar phrases may refer to one or more of the following: reflection of X-rays in the Y direction (or toward Y), transmission of X-rays in the Y direction (or toward Y) (i.e., allowing light X to pass through in the Y direction), and refraction of X-rays in the Y direction (or toward Y).

[0044] Furthermore, in embodiments, as described above, the light generation system may include one or more dichroic beamsplitters. Specifically, in embodiments, the light generation system may include a first dichroic beamsplitter configured in the optical path between a first light generation device or a second light generation device (such as the first light generation device, or such as the second light generation device) and a main beamsplitter. Accordingly, in embodiments, the first dichroic beamsplitter may be configured to guide at least a portion of the first device light or at least a portion of the second device light to the main beamsplitter. Specifically, in embodiments, the first dichroic beamsplitter may be configured to guide at least 60%, such as at least 70%, such as at least 80%, specifically at least 90%, such as at least 95%, including 100%, of the (first or second) device light (received by the first dichroic beamsplitter) to the main beamsplitter. Additionally or alternatively, in embodiments, the first dichroic beamsplitter may be configured to guide at least a portion of the luminescent material light (the generated first device light and / or the generated second device light) to an auxiliary dichroic beamsplitter (also hereinafter). Specifically, in an embodiment, the first dichroic beam splitter may be configured to direct at least 60%, such as at least 70%, like at least 80%, specifically at least 90%, such as at least 95%, including 100%, of the luminescent material light (received by the first dichroic beam splitter) (generated by the light from the first device and / or the light from the second device) to the auxiliary dichroic beam splitter.

[0045] In addition to the luminescent material, the light generating system may also include one or more diffusers. In a specific embodiment, the light generating system may include a single diffuser. However, in other embodiments, the light generating system may include more than one diffuser, such as two diffusers, or even three diffusers. Using more than one diffuser may be advantageous because it reduces the degradative effects of aging a single diffuser and provides opportunities for heat dissipation and thus provides thermal management.

[0046] The at least one or more diffusers may be specifically configured to receive light from one or more (specifically both) of the first light generating device and the second light generating device. Specifically, in an embodiment, at least one (or even all) of the one or more diffusers may be configured to receive light from the first light generating device. More specifically, at least one (or even all) of the one or more diffusers may be configured to convert at least a portion of a second-first portion of the first device light into diffuse light based on the first device light. Specifically, in an embodiment, at least 60%, for example at least 70%, like at least 80%, specifically at least 90%, more specifically at least 95% of the second-first portion of the first device light received by one or more diffusers may be converted into diffuse light based on the first device light. Similarly, in an embodiment, at least one (or even all) of the one or more diffusers may be configured to receive light from the second light generating device. More specifically, at least one (or even all) of one or more diffusers can be configured to convert at least a portion of a second second portion of the second device light into diffuse light based on the second device light. Specifically, in embodiments, at least 60%, such as at least 70%, like at least 80%, specifically at least 90%, and more specifically at least 95% of the second device light (the second second portion) received by one or more diffusers can be converted into diffuse light based on the second device light. The term "diffuse light based on device light" and similar terms can refer to diffuse (d) light generated by a diffuser when illuminated with device light. Thus, device light can be converted into diffuse device light, or "diffuse light based on first device light".

[0047] In some embodiments, the light generation system may include a diffuser configured to receive light from both a first light generation device and a second light generation device. Accordingly, in an operating mode of the light generation system, the diffuser may receive at least a portion of a second-first portion of the first device light and a second-second portion of the second device light. In another operating mode of the light generation system, for example by operating only the first or second light generation device, the diffuser may receive at least a portion of only one of the second-first portion of the first device light and the second-second portion of the second device light. Furthermore, in some embodiments, the light generation system may include more than one diffuser. In such embodiments, each diffuser may be configured to receive light from different light generation devices. For example, in one embodiment, first device light originating from the first light generation device may (only) be incident on the first diffuser, and second device light originating from the second light generation device may (only) be incident on the second diffuser. However, in other embodiments, more than one diffuser may (all) be configured to receive the second-first portion of the first device light and the second-second portion of the second device light in an operating mode of the light generation system. Other embodiments of the diffuser will be described in more detail below.

[0048] In an embodiment, the light generation system is further configured such that the luminescent material light generated by the first device light, the luminescent material light generated by the second device light, the diffused light based on the first device light, and the diffused light based on the second device light can be combined. Therefore, in an embodiment, the light generation system may include an auxiliary dichroic beam splitter. Specifically, in an embodiment, the auxiliary dichroic beam splitter may be configured downstream of one or more of one or more diffusers and upstream of the light outlet. Accordingly, in an embodiment, the auxiliary dichroic beam splitter may be configured to guide (a) the luminescent material light generated by the first device light and the diffused light based on the first device light, and (b) the luminescent material light generated by the second device light and the diffused light based on the second device light, along the same optical path to the light outlet of the light generation system. Therefore, specifically, the auxiliary dichroic beam splitter may be configured to (i) reflect or transmit light having wavelengths selected from the yellow-orange wavelength range, and (ii) transmit or reflect light having wavelengths selected from the blue wavelength range. For example, in an embodiment, the auxiliary dichroic beam splitter may reflect light having wavelengths selected from the blue wavelength range and transmit light having wavelengths selected from the yellow-orange wavelength range. Accordingly, in embodiments, an auxiliary dichroic beamsplitter may be configured to (i) reflect at least a portion of the diffuse light generated by the first and / or second device light, and (ii) transmit at least a portion of the luminescent material light generated by the first and / or second device light. However, in other embodiments, the auxiliary dichroic beamsplitter may be transmissive to light having wavelengths selected from the blue wavelength range, and reflective to light having wavelengths selected from the yellow-orange wavelength range. Accordingly, in embodiments, an auxiliary dichroic beamsplitter may be configured to (i) transmit at least a portion of the diffuse light generated by the first and / or second device light, and (ii) reflect at least a portion of the luminescent material light generated by the first and / or second device light. In embodiments, the term "auxiliary dichroic beamsplitter" may refer to two or more auxiliary dichroic beamsplitters.

[0049] The light generation system can therefore be configured to generate system light comprising one or more of system light generated by a first device and system light generated by a second device. In an embodiment, the system light generated by the first device may specifically include at least a portion of diffuse light based on the first device light and at least a portion of luminescent material light generated by the first device light. Similarly, in an embodiment, the system light generated by the second device may specifically include at least a portion of diffuse light based on the second device light and at least a portion of luminescent material light generated by the second device light. In an embodiment, the control system can be configured to control the first light generation device and the second light generation device to provide system light (including system light generated by the first device light and / or system light generated by the second device light). Furthermore, the system light may be white light. Specifically, in an embodiment, the system light generated by the first device light and the system light generated by the second device light may be white light. The term "white light" and similar terms used herein are known to those skilled in the art. It can particularly involve light with a correlated color temperature (CCT) between approximately 1800K and 20000K, for example, between 2000K and 20000K, especially between 2700-20000K.

[0050] In a specific embodiment, the system light generated by the first device light may have a first color point (according to CIE 1931). Similarly, in an embodiment, the system light generated by the second device light may have a second color point (according to CIE 1931). In an embodiment, the first and second color points may be within 20 standard deviations of color matching with the blackbody trajectory, such as within 10 standard deviations, and within 20 standard deviations of color matching with each other, such as within 10 standard deviations. Specifically, in an embodiment, the first and second color points may be within 7 standard deviations of color matching with the blackbody trajectory and within 7 standard deviations of color matching with each other. Such an embodiment may be advantageous because it ensures that the first and second device lights can provide substantially the same type of white system light, thereby preventing color point drift of the system light due to differential aging of one of the light generating devices.

[0051] Furthermore, in embodiments, the light generating system can be configured such that the system light can be white light having a correlated color temperature (CCT) of at least 3500K, for example at least 5000K, specifically at least 6500K, and more specifically at least 10000K. Additionally, in embodiments, the light generating system can be configured such that the system light can be white light having a CCT of up to 20000K, such as up to 12000K. In specific embodiments, the CCT can be selected from the range of 6000-12000K, such as from the range of 7000-12000K, such as at least 8000K. Furthermore, in embodiments, the CCT can be selected from the range of 6000-12000K, for example from the range of 7000-12000K, combined with a CRI of at least 70, for example at least 80.

[0052] Such an implementation may be advantageous because the light-generating system can provide high brightness and high-performance white light, which may be particularly useful for applications such as projection systems, automotive headlights, searchlights, stage lighting (specifically for tourism, stage, DJ and club applications), architectural lighting and special lighting applications.

[0053] The aim is to provide a light generation system for the aforementioned applications that has improved lifetime, i.e., consistent high performance over an extended period. Differential aging of the light source in a light generation system can lead to a decrease and drift in the color point of the system light. Therefore, the aforementioned light generation system can provide high-performance white light without or with reduced differential aging.

[0054] In an embodiment, the light generating system can therefore be configured such that the primary first portion of the light from the first device received by the light-emitting material can have a primary first portion radiant flux Ω. 11 Additionally, in an embodiment, the light generating system may be configured such that a sub-first portion of the first device light received by at least one of one or more diffusers can have a sub-first portion radiant flux Ω. 12 Additionally, in an embodiment, the light generating system can be configured such that the principal second portion of the second device light received by the luminescent material can have a principal second portion radiant flux Ω. 21 Additionally, in an embodiment, the light generating system can be configured such that a second portion of the second device light received by at least one of one or more diffusers can have a second portion radiant flux Ω. 22In this document, all radiative flux can be defined as watts. In embodiments, the (first and / or second) device light can be configured to include radiative flux as indicated herein by selecting the polarization of the first and second device light, respectively, a selection related to the selection of the master (polarizing) beamsplitter and its axis relative to the laser polarization direction. In other words, the polarization direction of the device light can be rotated relative to the polarization direction of the polarizing beamsplitter to obtain the desired radiative flux, also as described below. In embodiments, this can be a fixed setting.

[0055] In the embodiment, the primary first part of the radiative flux Ω 11 The first part of the radiation flux Ω 12 The second part of the main radiative flux Ω 21 and the second part of the radiation flux Ω 22 It can be configured to make Ω 11 / Ω 12 and Ω 21 / Ω 22 The value can be individually selected from the range of 2-4, such as the range from 2.5-3.5, like the range from 2.8-3.2. Furthermore, in embodiments, the light-generating system can be configured such that 0.85 ≤ (Ω) 11 / Ω 12 ) / (Ω 21 / Ω 22 )≤1.15, such as 0.9≤(Ω) 11 / Ω 12 ) / (Ω 21 / Ω 22 )≤1.1, such as 0.95≤(Ω) 11 / Ω 12 ) / (Ω 21 / Ω 22 ) ≤1.05 applies. Therefore, in the embodiments, the light generating system can be configured such that: (a) the main first portion of the first device light received by the luminescent material can have a main first portion radiant flux Ω 11 (b) The second first portion of the first device light received by at least one of one or more diffusers may have a second first portion radiant flux Ω. 12 (c) The principal second part of the light received by the luminescent material from the second device can have a principal second part radiative flux Ω 21 (d) The second portion of the second device light received by at least one of one or more diffusers may have a second portion radiant flux Ω. 22 ; and (e) 0.9 ≤ (Ω) 11 / Ω 12 ) / (Ω 21 / Ω 22 )≤1.1.

[0056] Such an embodiment can be advantageous because the first device light and the second device light can thus contribute to the white system light, such that the system light generated by the first device light and the system light generated by the second device light comprise substantially the same type of white light. Therefore, if one of the first light generating devices or the second light generating device malfunctions, for example through differential aging, the output system light will still comprise substantially the same color point.

[0057] In embodiments, the radiant flux of different types of light can therefore influence each other; that is, if the radiant flux of one light generating device decreases at a higher rate due to differential aging than that of another light generating device, the latter can be configured to compensate for the former. Specifically, in embodiments, the intensity of one light generating device can be changed to compensate for the decrease in intensity of the other light generating device. Therefore, in embodiments, the control system can be configured to control the first device light (especially its intensity) based on one or more of the diffuse light based on the second device light and the luminescent material light generated by the second device light. Specifically, in embodiments, if the radiant flux of the diffuse light based on the second device light (and / or the luminescent material light generated by the second device light) decreases, the control system can be configured to control the first device light such that the radiant flux of the diffuse light based on the first device light (and / or the luminescent material light generated by the first device light) can compensate for the corresponding decrease in the radiant flux of the corresponding second device light. Additionally or alternatively, in embodiments, the control system can be configured to control the second device light (especially its intensity) based on one or more of the diffuse light based on the first device light and the luminescent material light generated by the first device light. Specifically, in an embodiment, if the radiant flux of the diffuse light (and / or the luminescent material light generated by the first device light) decreases, the control system can be configured to control the second device light such that the radiant flux of the diffuse light (and / or the luminescent material light generated by the second device light) can compensate for the corresponding decrease in the radiant flux of the first device light. Therefore, in an embodiment, the control system can be configured to: (a) control the first device light according to one or more of the following: (a1) the diffuse light based on the second device light and (a2) the luminescent material light generated by the second device light; and (b) control the second device light according to one or more of the following: (b1) the diffuse light based on the first device light and (b2) the luminescent material light generated by the first device light.

[0058] Furthermore, in the embodiments, the control system may be configured to control one or more of the spectral power distribution, correlated color temperature, and color rendering index of the system light (especially the system light generated by the first device light and the system light generated by the second device light).

[0059] The term "control" and similar terms specifically refer to at least determining the behavior of an element or monitoring the operation of an element. Therefore, "control" and similar terms here can refer, for example, to applying behavior to an element (determining behavior or monitoring the operation of the element), such as, for example, measuring, displaying, actuating, turning, shifting, changing temperature, etc. In addition, the term "control" and similar terms can also include monitoring. Therefore, the term "control" and similar terms can include applying behavior to an element and applying behavior to an element and monitoring the element. Control of the element can be accomplished using a control system, which can also be referred to as a "controller". The control system and the element can therefore be functionally coupled, at least temporarily or permanently. The element can include a control system. In embodiments, the control system and the element may not be physically coupled. Control can be accomplished via wired and / or wireless control. The term "control system" can also refer to multiple different control systems, which are particularly functionally coupled, and where, for example, one control system can be a master control system, while one or more other control systems can be slave control systems. The control system can include or can be functionally coupled to a user interface.

[0060] Here, in this embodiment, the control system can be configured, in particular, to control the first device light and the second device light based on the spectral power distribution of the system light. Therefore, in this embodiment, the light generating system (e.g., the control system) may include, for example, a sensor. The sensor can be configured to measure the spectral power distribution of the system light and provide the control system with a sensor signal related to the measured spectral power distribution. The control system can be configured to subsequently control the first device light and / or the second device light based on the sensor signal, i.e., based on the spectral power distribution of the system light.

[0061] The control system can also be configured to receive and execute commands from a remote control. In one embodiment, the control system can be controlled via an app on the device, such as a portable device like a smartphone or I-phone, tablet, etc. Therefore, in such an embodiment, the user can provide commands to the control system based on the spectral power distribution of the system light. Thus, the device does not necessarily need to be coupled to the lighting system, but can be (temporarily) functionally coupled to it.

[0062] A system, apparatus, or device may perform actions in a “mode,” “operating mode,” “mode of operation,” or “operational mode.” The term “operational mode” may also refer to “control mode.” Similarly, in a method, actions, stages, or steps may be performed in a “mode,” “operating mode,” “mode of operation,” or “operational mode.” This does not preclude the system, apparatus, or device from being adapted to provide another control mode or multiple other control modes. Likewise, this does not preclude the possibility of performing one or more other modes before and / or after performing a particular mode.

[0063] However, in embodiments, the control system may be available and is adapted to provide at least a control mode. If other modes are available, the selection of these modes can be performed, in particular, via a user interface, although other options, such as performing modes based on sensor signals or (time) schemes, are also possible. In embodiments, an operating mode may also refer to a system, device, or apparatus that can only operate in a single operating mode (i.e., "on," without further tunability).

[0064] Therefore, in this embodiment, the control system can perform control based on one or more of the following: input signals from the user interface, sensor signals (from the sensors), and timers. The term "timer" can refer to a clock and / or a predetermined timing scheme.

[0065] Returning to the main beam splitter, in this embodiment, the main beam splitter may therefore include a polarization beam splitter. In this embodiment, the polarization of the main (polarization) beam splitter (especially its polarization axis), the first device light (especially its polarization axis), and the second device light (especially its polarization axis) can be selected to achieve the aforementioned radiant flux. Therefore, in a specific embodiment, the main beam splitter may include a first polarization beam splitter. The first polarization beam splitter can be defined as a filter that allows light waves of a specific polarization to pass through while reflecting light waves of other polarizations, thereby separating the incident beam. Specifically, in this embodiment, the first polarization beam splitter may be a polarization beam splitter for light with wavelengths in the blue wavelength range. However, this may not be the case in other embodiments. Therefore, the first polarization beam splitter may have a first polarization beam splitter polarization axis (A...). p The polarization axis of the first polarization beam splitter (A) p The angle between the beam splitter and the polarization axis of the device light (see further below) indicates which portion of the elliptically polarized light will be reflected and which portion will be transmitted by the first polarization beam splitter. Specifically, in embodiments, a beam splitter with a polarization axis substantially parallel to the polarization axis of the first polarization beam splitter (A) is used. p Light polarized at (A) can be (completely) reflected by the first polarization beamsplitter, while light with polarization substantially perpendicular to the polarization axis (A) of the first polarization beamsplitter can be reflected. p The polarized light of the first device can be (completely) transmitted by the first polarization beamsplitter. Therefore, in an embodiment, the first device light, especially when received by the first polarization beamsplitter, can have a first device light polarization axis (A1). Similarly, in an embodiment, the second device light, especially when received by the first polarization beamsplitter, can have a second device light polarization axis (A2). Typically, the system will be configured such that one of the second device light polarization axis (A2) and the first device light polarization axis (A1) will be substantially parallel to the polarization axis (A2) of the first polarization beamsplitter. p ), and therefore the other will be substantially perpendicular to the polarization axis of the first polarization beam splitter (A). pIn this manner, the main beam splitter will be configured to substantially reflect one (entirely) of the first device light and the second device light, and to substantially transmit the other of the first device light and the second device light. However, in this embodiment, for one or more, especially both, of the polarization axes of the first device light (A1) and the second device light (A2), the following condition may apply: they are neither parallel to nor perpendicular to the polarization axis of the first polarization beam splitter (A2). p In this way, in one embodiment, a portion of the first device light can be transmitted, while another portion of the first device light can be reflected by the main beamsplitter. Similarly, in such an embodiment, a portion of the second device light can be transmitted, while another portion of the second device light can be reflected by the main beamsplitter. Therefore, in other words, the main (polarizing) beamsplitter of the light generation system with a specific polarization axis can be selected. By changing the polarization of the first and second device lights, their interaction with the main (polarizing) beamsplitter can be altered; that is, the amount of first and second device light transmitted and / or reflected by the main beamsplitter can be changed. Specifically, in such an embodiment, the ratio of the primary first portion to the secondary first portion and similarly the ratio of the primary second portion to the secondary second portion can be varied, resulting in different radiant fluxes (as described above) of the corresponding portions of the first and second device light received by the luminescent material and the diffuser. Therefore, in a specific embodiment, the main beamsplitter may include a first polarizing beamsplitter, wherein the first polarizing beamsplitter may include a first polarizing beamsplitter polarization axis (A). p The first device light received by the first polarization beamsplitter may have a first device light polarization axis (A1), and the second device light received by the first polarization beamsplitter may include a second device light polarization axis (A2); wherein for the two device light polarization axes (A1, A2), the following condition applies: they are neither parallel to nor perpendicular to the polarization axis (A1, A2) of the first polarization beamsplitter. p ).

[0066] Specifically, in the embodiment, the optical polarization axis (A1) of the first device can be aligned with the polarization axis (A1) of the first polarization beam splitter. p The second device has a first angle (θ1). Furthermore, in an embodiment, the optical polarization axis (A2) of the second device can be aligned with the polarization axis (A1) of the first polarization beam splitter. pThe first angle (θ1) and the second angle (θ2) may have a second angle (θ2). In embodiments, the first angle (θ1) and the second angle (θ2) may (individually) be selected from the range of 1-89°, such as the range of 5-85°, such as the range of 20-70°. In other embodiments, 85 ≤ (θ1 + θ2) ≤ 95, for example, 88 ≤ (θ1 + θ2) ≤ 92, specifically θ1 + θ2 = 90°. For example, in embodiments, the first angle (θ1) and the second angle (θ2) may be different; for example, the first angle (θ1) may be 20° and the second angle (θ2) may be 70°, or vice versa. In another example, in an embodiment, the first angle (θ1) may be 30° and the second angle (θ2) may be 60°, or vice versa.

[0067] In an embodiment, during the manufacturing phase of the light generation system, one or more of the first light generation device, the second light generation device, and the first polarizing beam splitter can be configured to rotate relative to each other such that the first angle (θ1) and the second angle (θ2) can be (individually) selected from the range of 1-89°. Specifically, in an embodiment, during the manufacturing phase of the light generation system, one or more of the first laser group (including a plurality of first light generation devices), the second laser group (including a plurality of second light generation devices), and the first polarizing beam splitter can be configured to rotate relative to each other such that the first angle (θ1) and the second angle (θ2) can be (individually) selected from the range of 1-89°. In such an embodiment, the first angle (θ1) and the second angle (θ2) can therefore be pre-programmed, i.e., the first angle (θ1) and the second angle (θ2) may not change during operation. However, this may not be the case in other embodiments, as will be discussed below.

[0068] Therefore, in embodiments, the first device light and the second device light can include elliptically polarized light. Specifically, in (other) embodiments, the first device light (e.g., received by the main beam splitter) can include x1% s-polarized light and 100-x1% p-polarized light. Furthermore, in embodiments, the polarization direction of the first device light can be rotated relative to the polarization direction of the first polarization beam splitter, such that at the first polarization beam splitter, the first device light can be split into z1% s-polarized light and 100-z1% p-polarized light. Furthermore, in embodiments, the second device light (e.g., received by the main beam splitter) can include 100-x1% s-polarized light and x1% p-polarized light. Specifically, in embodiments, the polarization direction of the second device light can be rotated relative to the polarization direction of the first polarization beam splitter, such that at the first polarization beam splitter, the second device light can be split into 100-z1% s-polarized light and z1% p-polarized light. Therefore, in embodiments, the polarization of the first device light can be related to the polarization of the second device light. In this document, specifically in the embodiments, x1 can be at least 1, for example at least 5, specifically at least 10, such as at least 30. Furthermore, in the embodiments, x1 can be at most 99, for example at most 95, specifically at most 90, such as at most 70. Therefore, in the embodiments, x1 can be selected from... The range, for example The range, such as The scope, specifically The range of z1. Furthermore, in embodiments, z1 can be at least 1, for example at least 5, specifically at least 10, such as at least 30. Furthermore, in embodiments, z1 can be at most 99, for example at most 95, specifically at most 90, such as at most 70. Therefore, in embodiments, z1 can be selected from... The range, for example The range, such as The scope, specifically The range. Therefore, in an embodiment, the (elliptically polarized) first device light can be split into p-polarized light and s-polarized light. Similarly, in an embodiment, the (elliptically polarized) second device light can also be split into both p-polarized light and s-polarized light. Furthermore, in an embodiment, one of the first device light and the second device light can be more s-polarized than p-polarized, so the other of the first device light and the second device light can be more p-polarized than s-polarized. For example, in an embodiment, x1 = 40%, that is, the first device light can include 40% p-polarized light and 60% s-polarized light, while the second device light can include 60% p-polarized light and 40% s-polarized light. Therefore, in an embodiment, the first device light can include x1% s-polarized light and 100-x1% p-polarized light, and the second device light can include 100-x1% s-polarized light and x1% p-polarized light; wherein the polarization axis (A1) of the first device light can be the same as the polarization axis (A1) of the first polarization beam splitter.p The second device has a first angle (θ1), and the optical polarization axis (A2) of the second device can be aligned with the polarization axis (A) of the first polarization beam splitter. p ) has a second angle (θ2), where θ1 + θ2 = 90°; where 1 <x1<99。

[0069] In embodiments, the light generation system may further include actuators. Specifically, in embodiments, the light generation system may include one or more actuators. One or more actuators may be configured to rotate one or more of a first light generation device, a second light generation device, and a first polarization beamsplitter. Specifically, in embodiments, one or more actuators may be configured to rotate one or more of a first laser group, a second laser group, and a first polarization beamsplitter. For example, in an embodiment, the light generation system may include an actuator configured to rotate a first polarization beamsplitter relative to a (static) first light generation device and a (static) second light generation device. In another example, in an embodiment, the light generation system may include actuators for each of the first light generation device, the second light generation device, and the first polarization beamsplitter. In such embodiments, the actuators may be specifically configured to rotate one or more of the first light generation device, the second light generation device, and the first polarization beamsplitter relative to each other, such that a first angle (θ1) and a second angle (θ2) may (individually) be selected from the range of 1-89°. Therefore, in embodiments, the actuator can be configured to adjust one or more of the first angle (θ1) and the second angle (θ2) by rotating one or more of the first light generating device, the second light generating device, and the first polarizing beam splitter. Therefore, in embodiments, the first angle (θ1) and the second angle (θ2) can thus be changed during operation of the light generating system. Therefore, in various embodiments, the control system can be configured to control the actuator. Specifically, in embodiments, the control system can be configured to individually control one or more actuators. Therefore, in embodiments, the control system can be configured to maintain a predetermined color point of the system light over time. The control system will be described in more detail below. Therefore, in embodiments, the light generating system may include an actuator, wherein the actuator can be configured to rotate one or more of the first light generating device, the second light generating device, and the first polarizing beam splitter; wherein the control system can be configured to control the actuator, and wherein the control system can be configured to maintain a predetermined color point of the system light over time. Such embodiments can be advantageous because they can improve the tunability of the light generating system. Furthermore, using such embodiments, the light generation system can become more user-friendly. Specifically, in addition to being factory-configured to reduce the effects of differential aging, the light generation system can be tailored to user preferences. Specifically, if one of the light generation devices degrades over time due to differential aging, the actuation of one or more light generation devices and the polarization beam splitter, along with the control system, can prevent a decrease in the color point of the system light. Therefore, these embodiments of the system can improve the system's lifespan.

[0070] Therefore, in this embodiment, the light generation system may have a predetermined color point of the system light. In this embodiment, the predetermined color point of the system light can be maintained (or retained) by controlling the radiant flux of the first light generation device and the second light generation device. In other embodiments, the predetermined color point of the system light can be maintained (or retained) by controlling the relative contribution of the first light generation device and the second light generation device to the system light. As described above, the relative contribution can be controlled by rotating one or more of the first light generation device, the second light generation device, and the first polarizing beam splitter relative to each other.

[0071] The following describes some additional embodiments including different configurations of the light generation system.

[0072] In embodiments, the luminescent material can be configured in either a transmission or reflection mode. Herein, when the indicating element operates in reflection mode, in embodiments, this can mean that at one or more wavelengths, the reflected radiation portion can be greater than the transmitted or absorbed radiation portion. Herein, when the indicating element operates in transmission mode, in embodiments, this can mean that at one or more wavelengths, the transmitted radiation portion can be greater than the reflected or absorbed radiation portion.

[0073] Specifically, the luminescent material can be configured in a transmission mode. In transmission mode, it is relatively easy to mix light from a source source with the light from the luminescent material, which can be used to produce a desired spectral power distribution. In reflection mode, thermal management can be easier because the main portion of the luminescent material can be in thermal contact with a thermally conductive element (such as a heat sink or thermal diffuser). Therefore, any device light will escape from the system, which in embodiments can be solely via transmission through the luminescent material. Similarly, in embodiments, one or more diffusers can be configured in either transmission or reflection mode. In embodiments, an example of a diffuser configured in reflection mode can be a metal-coated glass diffuser exhibiting 95-98% reflectivity. Conversely, in embodiments, an example of a diffuser configured in transmission mode can be an opal (glass or polymer) sheet, or a glass or polymer element with a diffuse coating. Therefore, in some embodiments, the luminescent material can be configured in transmission mode (and at least one of the one or more diffusers can be configured in either transmission or reflection mode). Specifically, in one embodiment, the luminescent material can be configured in a transmission mode, and substantially all of the one or more diffusers can be configured in the same mode of transmission or reflection. In other embodiments, the luminescent material can be configured in a reflection mode (and at least one of the one or more diffusers can be configured in a transmission-reflection mode). Specifically, in one embodiment, the luminescent material can be configured in a reflection mode, and substantially all of the one or more diffusers can be configured in the same mode of transmission or reflection. In a specific embodiment, the following applies: (i) the luminescent material can be configured in a reflection mode, and (ii) at least one of the one or more diffusers can be configured in a reflection mode. Specifically, in one embodiment, the luminescent material can be configured in a reflection mode, and substantially all of the one or more diffusers can be configured in a reflection mode. Such embodiments can be advantageous because the system can be more fail-safe due to the reflective configuration of both the luminescent and diffused light, thereby preventing direct laser beam emission from the system in the event of a failure of the luminescent or diffused component (e.g., breakage, detachment, etc.).

[0074] In embodiments, the luminescent material may in particular be composed of a luminescent body. The luminescent body may be a layer, such as a self-supporting layer. The luminescent body may also be a coating. The luminescent body may also include a luminescent coating on a support (specifically, a light-transmitting support in transmission mode). Specifically, the luminescent body may be substantially self-supporting. In embodiments, the luminescent material may be provided as a luminescent body, such as a luminescent single crystal, a luminescent glass, or a luminescent ceramic body. Such a body may be referred to as a "converter body" or a "luminescent body." In embodiments, the luminescent body may be a luminescent single crystal or a luminescent ceramic body. For example, in embodiments, cerium-containing garnet luminescent material may be provided as a luminescent single crystal or as a luminescent ceramic body. In other embodiments, the luminescent body may include a light-transmitting body in which the luminescent material is embedded. For example, the luminescent body may include a glass body in which the luminescent material is embedded. Alternatively, such glass may be luminescent. In other embodiments, the luminescent body may include a polymer in which the luminescent material is embedded. In embodiments, the luminescent body (or "body") may have a lateral dimension of width or length (W or L) or diameter (D) and thickness or height (H). In the embodiments, (i) D ≥ H or (ii) W ≥ H and / or L ≥ H. In specific embodiments, L ≤ 10 mm, for example, specifically L ≤ 5 mm, more specifically L ≤ 3 mm, and most specifically L ≤ 2 mm. In specific embodiments, W ≤ 10 mm, such as specifically W ≤ 5 mm, more specifically W ≤ 3 mm, and most specifically W ≤ 2 mm. In specific embodiments, H ≤ 10 mm, such as specifically H ≤ 5 mm, more specifically H ≤ 3 mm, and most specifically H ≤ 2 mm. In specific embodiments, D ≤ 10 mm, such as specifically D ≤ 5 mm, more specifically D ≤ 3 mm, and most specifically D ≤ 2 mm. In specific implementations, the body may have a thickness in the range of 50 μm to 1 mm. Specifically, the lateral dimensions such as length, width, and diameter are at least twice the height, such as at least five times the height.

[0075] A light-emitting body can have any shape. However, typically, a light-emitting body may include two substantially parallel faces defining its height. Furthermore, a light-emitting body may include edge faces bridging the two substantially parallel faces. Edge faces may be curved in one or two dimensions. Edge faces may be planar. A light-emitting body may have a rectangular or circular cross-section, although other cross-sections are also possible, such as hexagonal, octagonal, etc. Therefore, a light-emitting body may, for example, have a cubic shape, a (non-cubic) cubic shape, an n-sided prism shape with n at least 5 (such as a pentagonal prism, hexagonal prism), and a cylindrical shape. However, other shapes are also possible. Specifically, a light-emitting body may have a cuboid shape, a cylindrical shape, or an n-sided prism shape, where n is 6 or 8. In the case of a cylindrical shape, the edge face may be a single edge face. In the case of a cuboid, the edge face may include four facets. In the case of a hexagonal prism, the edge face may include six small facets.

[0076] In an embodiment, the light-emitting material (and one or more diffusers, optionally one or more diffusers) included in the light-emitting body may be configured to be in thermal contact with a thermally conductive material. For example, the light-emitting material may be configured to be in thermal contact with a thermally conductive element.

[0077] Thermally conductive elements may in particular include thermally conductive materials. The thermally conductive materials may, in particular, have a thermal conductivity of at least about 20 W / (m²). K), such as at least about 30W / (m K), for example, at least about 100 W / (m K), such as at least about 200 W / (m³) The thermal conductivity is approximately 10 W / (m²). In another specific embodiment, the thermally conductive material may in particular have a thermal conductivity of at least about 10 W / (m²). The thermal conductivity of K). In embodiments, the thermally conductive element may include one or more of a heat sink, a heat diffuser, and a two-phase cooling device, or may be configured to be in thermal contact with one or more of a heat sink, a heat diffuser, and a two-phase cooling device. If an element can exchange energy through heat treatment, it can be considered to be in "thermal contact" with another element. Thus, the elements can be thermally coupled. In embodiments, thermal contact can be achieved through physical contact. In embodiments, thermal contact can be achieved via a thermally conductive material, such as thermally conductive adhesive (or thermally conductive glue). Thermal contact can also be achieved between two elements when they are arranged relative to each other at a distance equal to or less than about 10 μm, although larger distances, such as up to 100 μm, are possible. The shorter the distance, the better the thermal contact. This distance can be the distance between two corresponding surfaces of the respective elements. This distance can be an average distance. For example, two elements may be in physical contact at one or more, such as multiple locations, but at one or more, specifically multiple other locations, the elements are not in physical contact. This may be the case, for example, when one or both elements have rough surfaces. When two elements are in thermal contact, they can be in physical contact or configured to be a short distance apart, such as a maximum of 10 μm, or even a maximum of 1 mm. When the two elements are configured to be a certain distance apart, an intermediate material can be disposed therebetween; however, in other embodiments, the distance between the two elements can be filled with gas, liquid, or can be a vacuum. When an intermediate material is available, a larger distance allows for higher thermal conductivity for the thermal contact between the two elements. However, a smaller distance allows for lower thermal conductivity of the intermediate material (although, of course, a higher thermal conductivity material can also be used).

[0078] As described above, in embodiments, at least one of the one or more diffusers can be configured to be in reflection mode. Furthermore, in specific embodiments, at least one (or even all) of the one or more diffusers may include polarization-preserving diffusers. Specifically, in embodiments where the device light received by the diffuser (first and / or second) can be polarized light, the diffuser may include a polarization-preserving diffuser. In embodiments, such diffusers can be selected, and the light generation system can be configured such that the depolarization of the diffuser is at most 50%, for example, at most about 25%. In embodiments, the depolarization of the diffused device light (relative to the device light illuminating the diffuser) may not exceed about 20%, for example, not exceeding about 10%.

[0079] Furthermore, in embodiments (specifically, where at least one of the one or more diffusers can be configured in a reflection mode), the light generation system may include a polarization-changing element. In embodiments, the polarization-changing element may be configured in the optical path between the main beamsplitter and, in particular, a polarization-preserving diffuser. In embodiments, the polarization-changing element may therefore be configured to be in a light-receiving relationship with the main beamsplitter, i.e., (first and / or second) device light can propagate from the main beamsplitter to the polarization-changing element. In embodiments, the polarization-changing element may be configured to change the polarization of the incident light. Specifically, the polarization-changing element may be configured to change linearly polarized light (e.g., s-polarized or p-polarized light) to circularly polarized light (e.g., left-handed or right-handed polarized light). The polarization-changing element may guide (first and / or second) (with changed polarization) device light to one or more polarization-preserving diffusers. Subsequently, the one or more polarization-changing diffusers may change the direction of the polarized light (e.g., from right-handed circular polarization to left-handed circular polarization and vice versa), but the circularly polarized light may remain substantially circularly polarized. At least a portion of the circularly polarized (based on the light from the first and / or second devices) diffused light can then propagate from one or more polarization-preserving diffusers back to the polarization-changing element, and is then converted into (diffuse) s-polarized light and / or (diffuse) p-polarized light, which can further propagate to the auxiliary dichroic beamsplitter. Therefore, in embodiments, at least one of the one or more diffusers can be configured in a reflection mode; the light generation system may also include a polarization-changing element disposed in the optical path between the main beamsplitter and the polarization-preserving diffuser.

[0080] In embodiments, the polarization-changing element can be, in particular, an element that induces a 90° phase shift between two orthogonal linear polarization components (s and p) of light. The most common approach is to use birefringent materials (birefringent rotators), such as quarter-wave plates. Therefore, in embodiments, the polarization-changing element may specifically include a λ / 4 waveplate. As known in the art, a waveplate or retarder is an optical device that alters the polarization state of a light wave traveling through it. A half-wave plate can change the polarization direction of linearly polarized light (especially from s to p or from p to s), while a quarter-wave plate can convert linearly polarized light into circularly polarized light (and vice versa). Therefore, in embodiments, the polarization-changing element may include a λ / 4 waveplate for one or more wavelengths of light from a first device and one or more wavelengths of light from a second device. In this way, p-polarized light can be converted into diffuse s-polarized light, and s-polarized light can be converted into diffuse p-polarized light. An alternative could be to use the Faraday effect, in which case the phase shift is induced by an applied magnetic field (Faraday rotator). Therefore, in embodiments, this phase shift can be the result of birefringence, electro-optic, thermo-optic, magneto-optic, or any other principle known in the art.

[0081] In embodiments where the light generation system includes a polarization-preserving diffuser, there may also be a polarization-changing element, particularly disposed in the optical path between the main beamsplitter and the polarization-preserving diffuser. However, in embodiments where the light generation system includes more than one polarization-preserving diffuser, there may also be more than one polarization-changing element. In such embodiments, each polarization-changing element may be specifically disposed in the optical path between one of the main beamsplitter and the polarization-preserving diffuser. Furthermore, in such embodiments, one or more (specifically each) polarization-changing elements may include a λ / 4 waveplate for one or more wavelengths of the first device light and for one or more wavelengths of the second device light. For example, in embodiments, one subset of the polarization-preserving diffuser and polarization-changing elements (specifically, λ / 4 waveplates) may be configured to receive and diffuse at least a portion of the first device light, and another subset of the polarization-preserving diffuser and polarization-changing elements (specifically, λ / 4 waveplates) may be configured to receive and diffuse at least a portion of the second device light. In other embodiments, essentially all subsets of the (polarization-preserving) diffusers and polarization-changing elements (specifically λ / 4 waveplates) can be configured to receive and diffuse at least a portion of both the first device light and the second device light.

[0082] The following describes some further specific embodiments of the light generation system, wherein the light generation system particularly includes a first diffuser, a first polarization changing element, a second polarization beam splitter, a second diffuser, a second polarization changing element, a third polarization beam splitter, and a fourth polarization beam splitter.

[0083] In an embodiment, a second polarization beamsplitter may be configured downstream of the main beamsplitter. Specifically, in an embodiment, the main beamsplitter may include a first polarization beamsplitter. Specifically, in an embodiment, the main beamsplitter may be a first polarization beamsplitter for light having wavelengths in the blue wavelength range. Furthermore, in an embodiment, the first polarization beamsplitter may be configured in the optical path between the first light generating device and the luminescent material, and in the optical path between the second light generating device and the luminescent material. Additionally, in an embodiment, the first polarization beamsplitter may also be configured in the optical path between the first light generating device and the second polarization beamsplitter, and in the optical path between the second light generating device and the second polarization beamsplitter. Therefore, in an embodiment, the second polarization beamsplitter may be configured to guide at least a portion of the first device light and at least a portion of the second device light (propagating from the first polarization beamsplitter to the second polarization beamsplitter) to the first diffuser. Additionally, in an embodiment, the second polarization beamsplitter may be configured to direct one or more of at least a portion of diffuse light based on the first device light and at least a portion of diffuse light based on the second device light (propagating from the first diffuser to the second polarization beamsplitter) to the second dichroic beamsplitter.

[0084] Furthermore, in embodiments, the first polarization-changing element may be configured in the optical path between the second polarization beamsplitter and the first diffuser. The (first and second) polarization-changing elements and (first and second) diffusers have been described in more detail above. Specifically, the first polarization-changing element may include an element configured to cause a 90° phase shift in the polarization of the incident light; such an element may be, for example, a λ / 4 waveplate. Additionally or alternatively, in embodiments, the first diffuser may include a polarization-maintaining diffuser.

[0085] Furthermore, in an embodiment, a third polarization beamsplitter may be configured downstream of the second polarization beamsplitter. In an embodiment, the third polarization beamsplitter may be configured to guide one or more of at least a portion of the first device light and at least a portion of the second device light (propagating from the second polarization beamsplitter to the third polarization beamsplitter) to the second diffuser. Additionally, in an embodiment, the third polarization beamsplitter may be configured to guide one or more of at least a portion of the diffused light based on the first device light and at least a portion of the diffused light based on the second device light (propagating from the second diffuser to the third polarization beamsplitter) to a fourth polarization beamsplitter.

[0086] Furthermore, in an embodiment, the second polarization-changing element may be configured in the optical path between the third polarization beamsplitter and the second diffuser. Specifically, the second polarization-changing element may include an element configured to cause a 90° phase shift in the polarization of the incident light; such an element may be, for example, a λ / 4 waveplate. Additionally or alternatively, in an embodiment, the second diffuser may include a polarization-maintaining diffuser.

[0087] Furthermore, in an embodiment, the auxiliary dichroic beamsplitter may be configured downstream of the first dichroic beamsplitter and the second polarization beamsplitter. Additionally, in an embodiment, the auxiliary dichroic beamsplitter may be configured to guide at least a portion of the diffused light based on the first device light and at least a portion of the diffused light based on the second device light (propagating from the second polarization beamsplitter to the second dichroic beamsplitter) to the fourth polarization beamsplitter. Furthermore, in an embodiment, the auxiliary dichroic beamsplitter may be configured to guide at least a portion of the luminescent material light (propagating from the first dichroic beamsplitter to the auxiliary dichroic beamsplitter) to the fourth polarization beamsplitter.

[0088] Furthermore, in the embodiments, a fourth polarization beamsplitter may be configured downstream of the second dichroic beamsplitter and the third polarization beamsplitter. The fourth polarization beamsplitter may in particular be configured to direct (a) diffuse light at least partially based on the light from the first device and / or at least partially based on the light from the second device, and (b) at least partially luminescent material light to a light outlet.

[0089] Therefore, in a specific embodiment, the light generation system may include a first diffuser, a first polarization changing element, a second polarization beamsplitter, a second diffuser, a second polarization changing element, a third polarization beamsplitter, and a fourth polarization beamsplitter; wherein: (i) the second polarization beamsplitter may be configured downstream of the main beamsplitter, wherein the main beamsplitter may include the first polarization beamsplitter; wherein the second polarization beamsplitter may be configured to (a) guide at least a portion of the first device light and at least a portion of the second device light to the first diffuser, and (b) guide at least a portion of the diffused light based on the first device light and at least a portion of the diffused light based on the second device light to the second dichroic beamsplitter; (ii) the first polarization changing element may be configured in the optical path between the second polarization beamsplitter and the first diffuser; (iii) the third polarization beamsplitter may be configured downstream of the second polarization beamsplitter; wherein the third polarization beamsplitter may be configured to (a) guide at least a portion of the first device light and at least a portion of the second device light to the second dichroic beamsplitter. (a) directing at least a portion of the diffused light based on the first device light to the second diffuser, and (b) directing one or more of the diffused light based on the second device light to the fourth polarization beamsplitter; (iv) a second polarization changing element may be configured in the optical path between the third polarization beamsplitter and the second diffuser; (v) an auxiliary dichroic beamsplitter may be configured downstream of the first dichroic beamsplitter and the second polarization beamsplitter; wherein the auxiliary dichroic beamsplitter may be configured to (a) direct at least a portion of the diffused light based on the first device light to the second diffuser. (a) directing at least a portion of the diffuse light based on the second device light to the fourth polarization beamsplitter; and (b) directing at least a portion of the luminescent material light to the fourth polarization beamsplitter; and (vi) the fourth polarization beamsplitter may be configured downstream of the auxiliary dichroic beamsplitter and the third polarization beamsplitter, and may be configured to direct at least a portion of (a) the diffuse light based on the first device light and / or at least a portion of the diffuse light based on the second device light, and (b) at least a portion of the luminescent material light to the light outlet.

[0090] In this embodiment, the system light may therefore include a diffuser light component and a luminescent material light component. In this embodiment, the diffuser light component may include one or more of diffuse light based on a first device light and diffuse light based on a second device light. Similarly, in this embodiment, the luminescent material light component may include one or more of luminescent material light generated by the first device light and luminescent material light generated by the second device light. Therefore, the specific embodiments described above can result in four different propagations of light through the light generation system, which will be described in more detail below with reference to the accompanying drawings.

[0091] As described above, a light generation system includes light generating devices. Light generating devices can be configured, in particular, to generate device light. Specifically, a light generating device may include a light source. A light source may be specifically configured to generate source light. In embodiments, device light may consist substantially of device light. In other embodiments, device light may consist substantially of converted source light. In other embodiments, device light may include (unconverted) source light and converted source light. Source light may be converted into luminescent material light using a luminescent material and / or converted into upconverted light using an upconverter (see also above). The term "light generating device" may also refer to multiple light generating devices that can provide device light having substantially the same spectral power distribution. In specific embodiments, the term "light generating device" may also refer to multiple light generating devices that can provide device light with different spectral power distributions.

[0092] The term "light source" can, in principle, refer to any light source known in the art. In specific embodiments, the light source includes solid-state LED light sources (e.g., LEDs or laser diodes (or "diode lasers")). The term "light source" can also refer to multiple light sources, such as 2-2000 (solid-state) LED light sources. Therefore, the term LED can also refer to multiple LEDs. Furthermore, the term "light source" in embodiments can also refer to so-called chip-on-board (COB) light sources. The term "COB" specifically refers to LED chips in the form of semiconductor chips that are neither packaged nor connected but directly mounted on a substrate such as a PCB. Therefore, multiple light-emitting semiconductor light sources can be configured on the same substrate. In embodiments, a COB is a multi-LED chip configured together as a single lighting module. The term "light source" can refer to semiconductor light-emitting devices, such as light-emitting diodes (LEDs), resonant cavity light-emitting diodes (RCLEDs), vertical cavity laser diodes (VCSELs), edge-emitting lasers, etc. The term "light source" can also refer to organic light-emitting diodes (OLEDs), such as passive matrix (PMOLEDs) or active matrix (AMOLEDs). In specific embodiments, the light source includes solid-state light sources (such as LEDs or laser diodes). In one embodiment, the light source includes LEDs (light-emitting diodes). The term "light source" or "solid-state light source" may also refer to a superluminescent diode (SLED). In embodiments, a light source may include one or more micro-optical elements (microlens arrays) downstream of a single solid-state light source (such as an LED) or downstream of multiple solid-state light sources (i.e., shared by multiple LEDs). In embodiments, a light source may include an LED with on-chip optics. In embodiments, a light source includes pixelated individual LEDs (with or without optics) (providing on-chip beam control in embodiments). In embodiments, a light source may be configured to provide a main radiation that is used as is, such as a blue light source like a blue LED, or a green light source like a green LED, and a red light source like a red LED. Such an LED, which may not include a luminescent material ("phosphor"), may be referred to as a direct-color LED.

[0093] In some embodiments, the light-generating device may include a light-emitting material. In some embodiments, the light-generating device may include a PCLED. In other embodiments, the light-generating device may include a direct LED (i.e., a phosphorless LED). In some embodiments, the light-generating device may include a laser device, such as a laser diode. In some embodiments, the light-generating device may include a superluminescent diode. Therefore, in specific embodiments, the light source may be selected from the group consisting of laser diodes and superluminescent diodes. In other embodiments, the light source may include an LED.

[0094] Light sources can be configured to produce light with an optical axis (O) (beam shape) and spectral power distribution. In embodiments, the light source may include one or more bands, such as those known to lasers. The term "light source" may (therefore) refer to such a light-generating element, such as a solid-state light source, or, for example, to a package of a light-generating element, such as a solid-state light source, and one or more of elements comprising luminescent materials and (other) optical devices (e.g., lenses, collimators). A light-converting element ("converter element" or "converter") may include an element having a luminescent material. For example, a solid-state light source like a blue LED is a light source. A combination of a solid-state light source (as a light-generating element) and a light-converter element optically coupled to the solid-state light source (e.g., a blue LED and a light-converter element) may also be a light source (but may also be referred to as a light-generating device). Thus, a white LED is a light source (but may also be referred to, for example, as a (white) light-generating device). The term "light source" as used herein may also refer to a light source including a solid-state light source, such as an LED or a laser diode or a superluminescent diode. Thus, in embodiments, the term "light source" may also refer to a light source based on light conversion, such as a light source combined with a luminescent converter material. Therefore, the term "light source" can also refer to a combination of an LED and a light-emitting material configured to convert at least a portion of the LED's radiation, or a combination of a (diode) laser and a light-emitting material configured to convert at least a portion of the (diode) laser's radiation. In embodiments, the term "light source" can also refer to a combination of a light source (such as an LED) and a filter that can alter the spectral power distribution of the light generated by the light source. Specifically, the term "light generating device" can be used to describe a light source and additional (optical components), such as filters and / or beam shaping elements. The phrases "different light sources" or "multiple different light sources" and similar phrases in embodiments can refer to multiple solid-state light sources selected from at least two different chambers. Similarly, the phrases "identical light sources" or "multiple identical light sources" and similar phrases in embodiments can refer to multiple solid-state light sources selected from the same chamber. The terms "solid-state light source" or "solid-state material light source" and similar terms can particularly refer to semiconductor light sources, such as light-emitting diodes (LEDs), diode lasers, or superluminescent diodes. Instead of the term "solid-state light source," the term "semiconductor-based light source" can also be used. Therefore, the term "semiconductor-based light source" can refer to one or more of light-emitting diodes (LEDs), laser diodes, and superluminescent diodes. Thus, light-generating devices can include one or more of light-emitting diodes (LEDs), laser diodes, and superluminescent diodes.

[0095] Light-emitting diodes (LEDs) are semiconductor light sources that emit light, especially when an electric current flows through them. Electrons in a semiconductor can recombine with electron-hole pairs, releasing energy in the form of photons. The color of light (corresponding to the energy of the photons) can be determined by the energy required for an electron to cross the band gap of the semiconductor.

[0096] A laser diode (or diode laser) can be a semiconductor device substantially similar to a light-emitting diode, wherein a diode directly pumped by a current can generate laser emission conditions at the junction of the diode. This is known to those skilled in the art.

[0097] The term "laser source" specifically refers to a laser. Such a laser can be configured to generate laser light having one or more wavelengths in the UV, visible, or infrared range, particularly wavelengths selected from the spectral wavelength range of 200-2000 nm, for example, 300-1500 nm. The term "laser" specifically refers to a device that emits light through a light amplification process based on stimulated emission of electromagnetic radiation. Specifically, in embodiments, the term "laser" can refer to a solid-state laser. In specific embodiments, the term "laser" or "laser source" or similar terms refers to a laser diode (or diode laser). In embodiments, the term "laser" or "solid-state laser" or "solid-state material laser" can refer to one or more semiconductor laser diodes, such as GaN, InGaN, AlGaInP, AlGaAs, InGaAsP, lead salts, vertical-cavity surface-emitting lasers (VCSELs), quantum cascade lasers, hybrid silicon lasers, etc.

[0098] In embodiments, the laser source light may include one or more frequency bands having a bandwidth known to the laser. In specific embodiments, the band may be a relatively sharp line, for example, having a full width at half maximum (FWHM) in the range of less than 20 nm at RT, such as equal to or less than 10 nm. Thus, the source light has a spectral power distribution (intensity on an energy scale as a function of wavelength) that may include one or more (narrow) bands. The beam (of the source light) may be a focused or collimated beam of (laser) source light. The term "focused" specifically refers to convergence into a small spot. This small spot may be located at, or (slightly) upstream of, or (slightly) downstream of, the discrete converter region. Specifically, focusing and / or collimation may be performed such that the cross-sectional shape of the beam at the discrete converter region (on the side) (perpendicular to the optical axis) is substantially no larger than the cross-sectional shape of the discrete converter region (where the source light illuminates the discrete converter region) (perpendicular to the optical axis). Focusing may be performed using one or more optical devices such as (focusing) lenses. Specifically, two lenses may be applied to focus the laser source light. Collimation can be performed using one or more (other) optical devices, such as collimating elements, like lenses and / or parabolic mirrors. In embodiments, the (laser) source beam can be relatively highly collimated, such as ≤2° (FWHM) in embodiments, more specifically ≤1° (FWHM), and most specifically ≤0.5° (FWHM). Therefore, ≤2° (FWHM) can be considered (highly) collimated source light. Optical devices can be used to provide (highly) collimation (see also above).

[0099] The term "solid-state material laser" and similar terms can refer to solid-state lasers, such as solid-state lasers based on crystals or glasses doped with ions (e.g., transition metal ions and / or lanthanide ions), fiber lasers, photonic crystal lasers, semiconductor lasers, such as, for example, vertical-cavity surface-emitting lasers (VCSELs).

[0100] Superluminescent diodes are known in the art. A superluminescent diode can be represented as a semiconductor device that can emit a broad spectrum of low-coherence light like an LED, while having brightness on the order of a laser diode.

[0101] Furthermore, in embodiments, the system may include additional optical devices as described above. The term "optical device" may specifically refer to one or more optical elements. Therefore, the terms "optical device" and "optical element" may refer to the same item. Optical devices may include one or more mirrors, reflectors, collimators, lenses, prisms, diffusers, phase plates, polarizers, diffraction elements, gratings, dichroic mirrors, one or more arrays of the above, etc. Alternatively or additionally, the term "optical device" may refer to a holographic element or a mixing rod. In embodiments, optical devices may include one or more of beam expander optics and zoom lens optics. See further examples of optical devices described above. In embodiments, optical devices may include integrators, such as "Koehler integrators" (or "Köhler integrators"). In specific embodiments, the system may also include one or more of integrated optics, collimating optics, and homogenizing optics. One or more of these are also shown in the figures. For example, in embodiments, optical devices may include integrators, such as compound eye lens arrays or diffusers. Furthermore, in embodiments, the optical device may include such an integrator in combination with additional converging and / or collimating optical components, such as an integrating bar having a polygonal cross-sectional shape, such as a reflective hollow integrating bar or a transmission solid integrating bar (based on total internal reflection with lateral confinement for longitudinal propagation of light).

[0102] Light generating systems can be part of or applied to, for example, any of the following: office lighting systems, home application systems, shop lighting systems, residential lighting systems, accent lighting systems, spotlighting systems, theater lighting systems, fiber optic application systems, projection systems, self-illuminating display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, directional sign systems, decorative lighting systems, portable systems, automotive applications, (outdoor) road lighting systems, urban lighting systems, greenhouse lighting systems, horticultural lighting, digital projection, or LCD backlighting. Light generating systems (or luminaires) can also be part of, for example, optical communication systems or disinfection systems, or can be applied to, for example, optical communication systems or disinfection systems.

[0103] 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. In this document, UV specifically refers to wavelengths selected from the range of 190–380 nm, for example, 200–380 nm. The terms “light” and “radiation” are used interchangeably herein unless the context clearly indicates that the term “light” refers only to visible light. Thus, the terms “light” and “radiation” can refer to UV radiation, visible light, and IR radiation. In specific embodiments, particularly for lighting applications, the terms “light” and “radiation” refer to (at least) visible light. The phrase “light having one or more wavelengths in a certain wavelength range” and similar phrases can specifically indicate that the indicated light (or radiation) has a spectral power distribution with one or more intensities at least at those one or more wavelengths within the indicated wavelength range. For example, a blue emitting solid-state light source would have a spectral power distribution with intensities at one or more wavelengths in the wavelength range of 440–495 nm.

[0104] In another aspect, the invention also provides a lamp or luminaire comprising a light-generating system as defined herein. The luminaire may further include a housing, optical elements, a light-transmitting grating, etc. The lamp or luminaire may also include a housing surrounding the light-generating system. The lamp or luminaire may include a light window or housing opening in the housing through which system light can escape from the housing. In yet another aspect, the invention also provides a projection device comprising a light-generating system as defined herein. Specifically, a projection device, or “projector” or “image projector,” can be an optical device that projects an image (or moving image) onto a surface such as a projection screen. The projection device may include one or more light-generating systems as described herein. Thus, in one aspect, the invention also provides a lighting device selected from the group consisting of lamps, luminaires, projector devices, disinfection devices, photochemical reactors, and optical wireless communication devices, comprising a light-generating system as defined herein. The lighting device may include a housing or carrier configured to house or support one or more elements of a light-generating system. For example, in an embodiment, the lighting device may include a housing or carrier configured to at least house or support a light-generating system. Attached Figure Description

[0105] Embodiments of the invention will now be described by way of example only, with reference to the accompanying schematic diagrams, wherein corresponding reference numerals indicate corresponding parts, and in the drawings:

[0106] Figures 1A-1D Some embodiments and aspects of the light-generating system (of which embodiments) are schematically depicted;

[0107] Figure 2 Some (other) embodiments and (other) aspects of the light-generating system (of which embodiments) are schematically depicted;

[0108] Figures 3A-3C Some aspects and working principles of a light-generating system (an embodiment) are shown.

[0109] Figure 4 Some application examples are illustrated schematically.

[0110] The diagram does not need to be drawn to scale. Detailed Implementation

[0111] Figure 1 schematically depicts a light generation system 1000, which includes a first light generation device 1100, a second light generation device 1200, a light-emitting material 200, one or more diffusers 710, a first polarizing beam splitter 1525, dichroic beam splitters 1515 and 2515, and a control system 300. Each light generation device 1100, 1200 may include one or more light generation devices 100. Specifically, in an embodiment, the first light generation device 1100 may include a plurality of first light generation devices 110. The first light generation device 110 may include a first light source 10 and may be specifically configured to generate light with a first peak wavelength (λ). p1 The first light generating device 111. Furthermore, in an embodiment, the first light generating device 1100 may include a first laser group comprising a plurality of first light generating devices 110. Therefore, in an embodiment, the first light generating device 110 may include a first laser diode. Furthermore, in an embodiment, the second light generating device 1200 may include a plurality of second light generating devices 120. The second light generating device 120 may include a second light source 20 and may be specifically configured to generate light with a second peak wavelength (λ). p2 The second light generating device 121. Furthermore, in an embodiment, the second light generating device 1200 may include a second laser group, which includes a plurality of second light generating devices 120. Therefore, in an embodiment, the plurality of second light generating devices 120 may include second laser diodes. In an embodiment, the first peak wavelength (λ) p1 ) and second peak wavelength (λ) p2 They can be relatively close to each other, specifically... .

[0112] Furthermore, in an embodiment, the light-emitting material 200 can be configured to (via the main beam splitter 1505) form a light-receiving relationship with the first light-generating device 1100, and can be configured to convert at least a portion of the first device light 111 into light-emitting material light 201a generated by the first device light. Additionally, in an embodiment, the light-emitting material 200 can be configured to form a light-receiving relationship with the second light-generating device 1200, and can be configured to convert at least a portion of the second device light 121 into light-emitting material light 201b generated by the second device light. Therefore, in an embodiment, the light-generating system 1000 can be configured such that both the first device light 111 and the second device light 121 can be guided to the light-emitting material 200, and thus both can contribute to the light-emitting material light 201(a, b). Furthermore, in an embodiment, the light-emitting material 200 can include at least the type... The first luminescent material 210, wherein A in embodiments comprises one or more of Y, La, Gd, Tb, and Lu, specifically (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. Specifically, A may comprise one or more of Y, Gd, and Lu, for example, specifically one or more of Y and Lu. Specifically, B may comprise one or more of Al and Ga, more specifically at least Al, such as substantially entirely Al.

[0113] In another embodiment, the luminescent material 200 may be configured in a transmission mode (not shown) or a reflection mode (as shown here). Similarly, in an embodiment, at least one of the one or more diffusers 710 may be configured in a transmission mode (as shown here). Figures 1A-1C (as shown) or in reflection mode (such as) Figure 1D and Figure 2 (As shown). Specifically, in the embodiments, the following applies: (i) the luminescent material 200 can be configured in a reflective mode, and (ii) at least one of the one or more diffusers 710 can be configured in a (transmitting or specifically) reflective mode. Note that if the light generating system 1000 includes the luminescent material 200 or diffuser 710 configured in a transmitting mode, the light generating system 1000 may also include one or more reflectors 570 configured to help guide the light, such as... Figures 1A-1C As shown.

[0114] Furthermore, in embodiments, the main beam splitter 1505 can be configured in the optical path between the first light generating device 1100 and the light-emitting material 200, and in the optical path between the second light generating device 1200 and the light-emitting material 200. Accordingly, in embodiments, the light generating system 1000 can be configured such that the first device light 111 received by the main beam splitter 1505 can include polarized light, and the second device light 121 received by the main beam splitter 1505 can also include polarized light. Specifically, the main beam splitter 1505 can be configured to guide a primary first portion of the first device light 111 to the light-emitting material 200, and to guide a secondary first portion of the first device light 111 to at least one of one or more diffusers 710. The corresponding primary and secondary first portions can specifically depend on the polarization of the first device light 111 and the polarization axis A of the main beam splitter. p See also below. Additionally, in embodiments, the main beam splitter 1505 may be configured to guide a primary second portion of the second device light 121 to the light-emitting material 200, and a secondary second portion of the second device light 121 to at least one of one or more diffusers 710. The corresponding primary and secondary second portions may specifically depend on the polarization of the second device light 121 and the polarization axis A of the main beam splitter. p See also below. Therefore, in embodiments, the main beam splitter 1505 may include one or more of a dichroic beam splitter and a polarizing beam splitter, such as at least one polarizing beam splitter.

[0115] Furthermore, in an embodiment, the first dichroic beam splitter 1515 may be configured to guide at least a portion of the first device light 111 or at least a portion of the second device light 121 to the main beam splitter 1505. Therefore, in an embodiment, the first dichroic beam splitter 1515 may be configured to be in a light-receiving relationship with one of the light-generating devices 110 (as depicted herein) and the second light-generating device 120 (not shown). Additionally, the first dichroic beam splitter 1515 may be configured to guide at least a portion of the luminescent material light 201a, 201b to the auxiliary dichroic beam splitter 2515.

[0116] Furthermore, in an embodiment, at least one of the one or more diffusers 710 may be configured to receive light from the first light generating device 1100. The diffuser 710 may in particular be configured to convert at least a sub-first portion of the first device light 111 into diffuse light 711a based on the first device light. Similarly, in an embodiment, at least one of the one or more diffusers 710 may be configured to receive light from the second light generating device 1200. The diffuser 710 may in particular be configured to convert at least a sub-second portion of the second device light 121 into diffuse light 711b based on the second device light.

[0117] In an embodiment, the light generating system 1000 may include a single diffuser 710, such as the one described here. Figures 1A-1C As depicted in [the text]. However, in other embodiments, such as [the text]... Figure 1D and Figure 2 As shown, the light generating system 1000 may include more than one diffuser 710a, 710b.

[0118] Furthermore, in an embodiment, the auxiliary dichroic beam splitter 2515 can be configured to guide (a) the luminescent material light 201a generated by the first device light and the diffused light 711a based on the first device light, and (b) the luminescent material light 201b generated by the second device light and the diffused light 711b based on the second device light, along the same optical path to the light outlet 1090 of the light generation system 1000. In an embodiment, the light outlet 1090 may include beam homogenizing optics to provide (uniform) system light 1001. In an embodiment, the light generation system may also include other additional optical components. Specifically, in an embodiment, the light generation system may include beam homogenizing / or collimating optics 550, a lens 560, and a reflector 570.

[0119] Therefore, in an embodiment, the light generating system 1000 can be configured to generate system light 1001, which includes one or more of the following: (a) system light 1001a generated by a first device light and (b) system light 1001b generated by a second device light. System light 1001a generated by the first device light includes at least a portion of diffuse light 711a based on the first device light and at least a portion of luminescent material light 201a generated by the first device light. System light 1001b generated by the second device light includes at least a portion of diffuse light 711b based on the second device light and at least a portion of luminescent material light 201b generated by the second device light. Specifically, system light 1001a and system light 1001b generated by the first device light can be white light. Furthermore, in an embodiment, the control system 300 can be configured to control the first light generating device 1100 and the second light generating device 1200.

[0120] In an embodiment, the system light 1001a generated by the first device light may have a first color point (according to CIE 1931). Furthermore, in an embodiment, the system light 1001b generated by the second device light may have a second color point (according to CIE 1931). Additionally, in an embodiment, the first and second color points may be within 20 standard deviations (such as within 7) of color matching with the blackbody trajectory, and within 20 standard deviations (such as within 7) of color matching with each other.

[0121] Furthermore, in an embodiment, the light generating system 1000 may be configured such that the system light 1001 may be white light having a correlated color temperature of at least 5000K, for example at least 6500K.

[0122] In another embodiment, the light generating system 1000 can be configured such that the main first portion of the first device light 111 received by the light-emitting material 200 can have a main first portion radiant flux Ω. 11 Similarly, the light generating system 1000 can be configured such that a sub-first portion of the first device light 111 received by at least one of one or more diffusers 710 can have a sub-first portion radiant flux Ω. 12 Similarly, in an embodiment, the light generating system 1000 can be configured such that the main second portion of the second device light 121 received by the light-emitting material 200 can have a main second portion radiant flux Ω. 21 Similarly, the light generating system 1000 can be configured such that a second portion of the second device light 121 received by at least one of the one or more diffusers 710 can have a second portion radiant flux Ω. 22 In this document, all radiative fluxes can be defined as watts. Furthermore, in the embodiments, 0.9 ≤ (Ω) can be applied in particular. 11 / Ω 12 ) / (Ω 21 / Ω 22 ≤1.1. Therefore, if one of the first light generating device 110 and the second light generating device 120 malfunctions due to aging, the other light generating device 100 of the two can be configured to compensate for the loss so that the system light 1001 can remain substantially the same (thereby preventing the shift of the color point).

[0123] Therefore, in an embodiment, the control system 300 may be configured to control the first device light 111 according to one or more of the following: (a1) diffuse light 711b based on the second device light and (a2) luminescent material light 201b generated by the second device light. Additionally or alternatively, in an embodiment, the control system 300 may be configured to control the second device light 121 according to one or more of the following: (b1) diffuse light 711a based on the first device light and (b2) luminescent material light 201a generated by the first device light. Furthermore, in an embodiment, the control system 300 may be configured to control the first device light 111 and the second device light 121 according to the spectral power distribution of the system light 1001.

[0124] Furthermore, in embodiments, the light-generating system may include one or more thermally conductive elements 750, such as, for example, thermal diffusers. Specifically, in embodiments, at least a light-emitting material and optionally one or more diffusers 710 may be configured on the thermally conductive element 750.

[0125] Figure 1B A light generation system 1000 is schematically depicted, wherein only the first light generating device 1100 is configured to provide light, and the first device light 111 (e.g., when the second light generating device 120 malfunctions due to aging). Consequently, in such an embodiment, the system light 1001 may consist of luminescent material light 201a generated by the first device light and diffused light 711a based on the first device light. Therefore, in this embodiment, the system light 1001 may consist of system light 1001a generated by the first device light. Similarly, Figure 1C A light generation system 1000 is schematically depicted, wherein only the second light generation device 1200 is configured to provide light, particularly the second device light 121 (e.g., when the first light generation device 110 malfunctions due to aging). Consequently, in such an embodiment, the system light 1001 may consist of luminescent material light 201b generated by the second device light and diffused light 711b based on the second device light. Therefore, in this embodiment, the system light 1001 may consist of system light 1001b generated by the second device light. Note that... Figures 1B-1C The illustrated embodiment is extreme. Typically, the first light generating device 110 and the second light generating device 120 can work together to contribute to the system light 1001 (a, b).

[0126] Figure 1D An embodiment of a light-generating system 1000 is schematically depicted, wherein a light-emitting material 200 and one or more diffusers 710, particularly a first diffuser 710a and a second diffuser 710b, can be configured in a reflection mode.

[0127] Specifically, in such embodiments, at least one of the diffusers 710 may include a polarization-preserving diffuser. Furthermore, in such embodiments, the light generation system 1000 may also include a polarization-changing element 810 disposed in the optical path between the main beam splitter 1505 and the polarization-preserving diffuser 710. In an embodiment, the polarization-changing element 810 includes a λ / 4 waveplate for one or more wavelengths of the first device light 111 and for one or more wavelengths of the second device light 121. Specifically, in an embodiment, the polarization-changing element 810 may be specifically configured to provide a 90° phase shift in the polarization of the light incident on the polarization-changing element 810. Furthermore, as described herein, in an embodiment, the light generation system may include a polarization-changing element 810 for each diffuser 710. Therefore, in an embodiment, a first polarization-changing element 810a may be disposed in the optical path between the second polarization beam splitter 2525 and the first diffuser 710a. Similarly, in this embodiment, the second polarization changing element 810b can be configured in the optical path between the second polarization beam splitter 2525 and the second diffuser 710b. Note that in this embodiment, the first and second diffusers 710a and 710b can be substantially the same type of diffuser and therefore can be freely interchanged. Similarly, in this embodiment, the first and second polarization changing elements 810a and 810b can be substantially the same type of polarization changing element and therefore can be freely interchanged.

[0128] Figure 2A specific embodiment of a light generation system is schematically depicted, including a first diffuser 710a, a first polarization alteration element 810a, a second polarization beamsplitter 2525, a second diffuser 710b, a second polarization alteration element 810b, a third polarization beamsplitter 3525, and a fourth polarization beamsplitter 4525. In a further embodiment, the second polarization beamsplitter 2525 may be configured downstream of the main beamsplitter 1505. In a further embodiment, the main beamsplitter 1505 may include the first polarization beamsplitter 1525. Furthermore, in an embodiment, the second polarization beamsplitter 2525 can be configured to (a) guide at least a portion of the first device light 111 and at least a portion of the second device light 121 (propagating from the first polarization beamsplitter 1525 to the second polarization beamsplitter 2525) to the first diffuser 710a, and (b) guide at least a portion of the diffused light 711a based on the first device light and at least a portion of the diffused light 711b based on the second device light (propagating from the first diffuser 710a to the second polarization beamsplitter 2525) to the auxiliary dichroic beamsplitter 2515. Furthermore, in an embodiment, the first polarization changing element 810a can be configured in the optical path between the second polarization beamsplitter 2525 and the first diffuser 710a. Specifically, the third polarization beamsplitter 3525 can be configured downstream of the second polarization beamsplitter 2525. In another embodiment, the third polarization beamsplitter 3525 may be configured to (a) guide at least a portion of the first device light 111 and at least a portion of the second device light 121 (propagating from the second polarization beamsplitter 2525 to the third polarization beamsplitter 3525) to the second diffuser 710b, and (b) guide at least a portion of the diffused light 711a based on the first device light and at least a portion of the diffused light 711b based on the second device light (propagating from the second diffuser 710b to the third polarization beamsplitter 3525) to the fourth polarization beamsplitter 4525. In a further embodiment, the second polarization changing element 810b may be configured in the optical path between the third polarization beamsplitter 3525 and the second diffuser 710b. Furthermore, in an embodiment, the second dichroic beamsplitter 2515 may be configured downstream of the first dichroic beamsplitter 1515 and the second polarization beamsplitter 2525. Furthermore, in an embodiment, the second dichroic beam splitter 2515 may be configured to (a) guide at least a portion of diffuse light 711a based on the first device light and at least a portion of diffuse light 711b based on the second device light (propagating from the second polarization beam splitter 2525 to the auxiliary dichroic beam splitter 2515) to the fourth polarization beam splitter 4525, and (b) guide at least a portion of luminescent material light 201a, 201b (propagating from the first dichroic beam splitter 1515 to the auxiliary dichroic beam splitter 2515) to the fourth polarization beam splitter 4525.Furthermore, in the embodiments, the fourth polarization beam splitter 4525 may be configured downstream of the auxiliary dichroic beam splitter 2515 and the third polarization beam splitter 3525, and may be configured to guide at least a portion of (a) diffuse light 711a based on the first device light and / or at least a portion of diffuse light 711b based on the second device light, and (b) at least a portion of the luminescent material light 201a, 201b to the light outlet 1090.

[0129] As indicated in the summary of the invention, the system described herein can result in four different propagations of light through the light-generating system. References are made below. Figure 2 This illustrates the propagation of light.

[0130] First, in an embodiment, polarized (blue) first device light 111 can be generated by a first light-generating device 110 and can propagate from the first light-generating device 110, specifically via a first dichroic beamsplitter 1515 (more specifically by its transmission) to a main beamsplitter 1505. In an embodiment, the main beamsplitter 1505 may include a polarization beamsplitter 1525 (as described above), which is configured such that one of the p-polarized first device light 111 and the s-polarized first device light 111 (here, especially the s-polarized one) is reflected, while the other (here, the p-polarized one) is transmitted through the main beamsplitter 1505. In an embodiment, one of the reflected or transmitted portions of the first device light (here, especially the transmitted portion) can propagate from the main beamsplitter 1505 to the luminescent material 200 (as described above and especially configured in a reflection mode), where it can be (at least partially) converted into luminescent material light 201a generated by the first device light. In one embodiment, the luminescent material light 201a generated by the first device light can propagate from the luminescent material 200 via the main beamsplitter 1505, particularly being transmitted (or reflected, not shown) by the main beamsplitter 1505 to the first dichroic beamsplitter 1515. In another embodiment, at the first dichroic beamsplitter 1515, the (yellow) luminescent material light 201a generated by the first device light can be guided, particularly being reflected (or transmitted, not shown), so that it can propagate to the auxiliary dichroic beamsplitter 2515. At the auxiliary dichroic beamsplitter 2515, in another embodiment, the (yellow) luminescent material light 201a generated by the first device light can be guided, particularly being transmitted (or reflected, not shown), so that it can propagate to the fourth polarization beamsplitter 4525. The fourth polarization beamsplitter 4525 can then guide the (yellow) luminescent material light 201a generated by the first device light to the light exit 1090, particularly being transmitted (or reflected, not shown) to the light exit 1090.

[0131] Secondly, in an embodiment, the polarized (blue) second device light 121 can be generated by the second light generating device 120 and can propagate from the second light generating device 120 (optionally, via the first dichroic beam splitter 1515, specifically transmitted by the first dichroic beam splitter 1515) to the main beam splitter 1505. Similar to the first device light 111, in an embodiment, the main beam splitter 1505 may include a polarization beam splitter 1525, configured such that one of the p-polarized second device light 121 and the s-polarized second device light 121 (here, particularly the p-polarized one) is reflected, while the other (here, the s-polarized one) is transmitted through the main beam splitter. In an embodiment, one of the reflected or transmitted portions of the second device light (here, particularly the reflected portion) can propagate from the main beam splitter 1505 to the light-emitting material 200, in which it can be (at least partially) converted into light-emitting material light 201b generated by the second device light. In an embodiment, the light 201b generated by the second device light can then propagate from the light 200 to the light outlet 1090 in substantially the same manner as described for the light 201a generated by the first device light.

[0132] Third, in the embodiment, the other of the reflective or transmissive portion of the first device light (as described for the first propagation of light), particularly the reflective portion, can propagate from the main beam splitter 1505 to the second polarization beam splitter 2525 (as described above), wherein it can be one of: (A) substantially reflected to the first polarization changing element 810a or (B) substantially transmitted to the third polarization beam splitter 3525. (A) At the first polarization changing element 810a, the linear polarization of the first device light 111 can undergo a 90° phase shift, after which the circularly polarized first device light 111 can propagate to the first diffuser 710a. In the embodiment, the circularly polarized first device light 111 can be diffused by the first (polarization-maintaining) diffuser 710a (configured in reflection mode) into diffuse light 711a based on the first device light. The diffused light 711a based on the first device light can again propagate from the first diffuser 710a via the first polarization changing element 810a, thereby undergoing a 90° phase shift to change the polarization back to linear polarization, and propagating via the second polarization beamsplitter 2525 (specifically, through its transmission) to the auxiliary dichroic beamsplitter 2515. At the auxiliary beamsplitter 2515, in the embodiment, the diffused light 711a based on the (blue) first device light can be guided, in particular, reflected, so that it can propagate to the fourth polarization beamsplitter 4525. The fourth polarization beamsplitter 4525 can then guide (specifically, through its transmission) to the light exit 1090. (B) At the third polarization beamsplitter 3525, the first device light 111 can be guided to the second polarization changing element 810b, particularly through transmission (not shown) or reflection (as shown here) by the third polarization beamsplitter 3525. At the second polarization-changing element 810b, the linear polarization of the first device light 111 can undergo a 90° phase shift, after which the circularly polarized first device light 111 can propagate to the second diffuser 710b. In an embodiment, the circularly polarized first device light 111 can be diffused by the second (polarization-maintaining) diffuser 710b (configured in reflection mode) into diffuse light 711a based on the first device light. The diffuse light 711a based on the first device light can again propagate via the second polarization-changing element 810b, thereby undergoing another 90° phase shift to change the polarization back to linear polarization, and then reach the fourth polarization beamsplitter 4525 via the third polarization beamsplitter 3525. At the fourth polarization beamsplitter 4525, in an embodiment, the diffuse light 711a based on the (blue) first device light can be guided, in particular reflected, so that it can propagate to the light exit 1090.

[0133] Finally, in an embodiment, the other of the reflective or transmissive portion of the second device light 121 (as described for the second propagation of light) can propagate from the main beam splitter 1505 to the second polarization beam splitter 2525 (as described above), wherein it (relative to the third propagation of light) can be the other of: (A) substantially reflected to the first polarization changing element 810a or (B) substantially transmitted to the third polarization beam splitter 3525. Therefore, the second device light 121 can be diffused, in particular, by one of the first diffuser 710a and the second diffuser 710b into a diffuse light 711b based on the second device light. In an embodiment, the diffuse light 711b based on the second device light can then propagate from the respective diffuser to the light exit 1090 in substantially the same manner as described for the diffuse light 711a based on the first device light.

[0134] Figure 3A Different types of device light and some aspects of the main beam splitter 1505 are schematically depicted. As described above, in an embodiment, the main beam splitter 1505 may include (at least) a first polarization beam splitter 1525. In an embodiment, the first polarization beam splitter 1525 may have a first polarization beam splitter polarization axis A1. Similarly, in an embodiment, the first device light 111 received by the first polarization beam splitter 1525 may have a first device light polarization axis A1. Likewise, in an embodiment, the second device light 121 received by the first polarization beam splitter 1525 may have a second device light polarization axis A2. Specifically, for the two device light polarization axes A1 and A2, in an embodiment, they may be adapted to be neither parallel nor perpendicular to the first polarization beam splitter polarization axis A1. p Furthermore, in the embodiments, the optical polarization axis A1 of the first device can be aligned with the polarization axis A of the first polarization beam splitter. p It has a first angle θ1. Similarly, in the embodiment, the optical polarization axis A2 of the second device can be aligned with the polarization axis A of the first polarization beam splitter. p It has a second angle θ2. Specifically, in an embodiment, the first angle θ1 and the second angle θ2 may not both be equal to 0° and may not be equal to 90°. However, in an embodiment, the polarizations of the first device light 111 and the second device light 121 may also be orthogonal to each other, i.e., θ1 + θ2 = 90°. In an embodiment, the first angle θ1 and the second angle θ2 may be factory-set, i.e., during the manufacturing stage of the light generation system 1000, the first light generation device 1100, the second light generation device 1200, and the first polarization beam splitter 1525 may be configured such that the first angle θ1 and the second angle θ2 are fixed. However, in other embodiments, the first angle θ1 and the second angle θ2 may be variable, see also the following Figure 3B .

[0135] Furthermore, in embodiments, the first device light 111 (such as that received by the main beam splitter 1505, particularly the first polarization beam splitter 1525) may include x1% s-polarized light and 100-x1% p-polarized light. Specifically, in embodiments, the polarization direction of the first device light 111 may be rotated relative to the polarization direction of the first polarization beam splitter 1525, such that at the first polarization beam splitter 1525, the first device light 111 can be split into z1% s-polarized light and 100-z1% p-polarized light. In embodiments, the rotation of the first device light 111 may be achieved by one or more of the following: rotational orientation of the first laser group relative to the first polarization beam splitter 1525, rotational orientation of the first polarization beam splitter 1525 relative to the first laser group, and rotational orientation of a single first laser in the first laser group relative to the first polarization beam splitter 1525.

[0136] In the embodiment, the first device light is elliptically polarized light, and the second device light is elliptically polarized light.

[0137] Conversely, in an embodiment, the second device light 121 (received by the main beam splitter 1505, particularly the first polarization beam splitter 1525) may comprise 100-x1% s-polarized light and x1% p-polarized light. Specifically, in an embodiment, the polarization direction of the second device light 121 may be rotated relative to the polarization direction of the first polarization beam splitter 1525, such that at the first polarization beam splitter 1525, the second device light 121 can be split into 100-z1% s-polarized light and z1% p-polarized light. In an embodiment, the rotation of the second device light 121 may be achieved by one or more of the following: rotational orientation of the second laser group relative to the first polarization beam splitter 1525, rotational orientation of the first polarization beam splitter 1525 relative to the second laser group, and rotational orientation of a separate set of second lasers within the second laser group relative to the first polarization beam splitter 1525.

[0138] Furthermore, in the embodiments, In a specific embodiment, x = 50. Furthermore, in a specific embodiment, one of the first device light 111 and the second device light 121 may be more s-polarized than p-polarized. Specifically, the other of the first device light 111 and the second device light 121 may be more p-polarized than s-polarized.

[0139] Figure 3C The aforementioned rotation is schematically depicted. Specifically, sub-Figure I schematically depicts the individual rotations of the first laser group (as a whole) and the second laser group (as a whole) relative to the first polarization beam splitter 1525, thereby causing the optical polarization axis A1 of the first device and the optical polarization axis A2 of the second device to be parallel to the polarization axis A of the first polarization beam splitter. pNeither parallel nor perpendicular. In sub-figure II, the same effect is achieved by rotating the first laser in the first laser group (instead of the entire first laser group) and the second laser in the second laser group (instead of the entire second laser group) relative to the first polarizing beam splitter 1525. Sub-figure III schematically depicts a similar situation to sub-figure II, but here only a subset (or partial package) of the first (and second) lasers in the first (and second) laser groups is rotated relative to the first polarizing beam splitter 1525.

[0140] In an embodiment, the light generating system may further include an actuator. Specifically, in an embodiment, the light generating system may include one or more actuators. Figure 3B A portion of a light generation system 1000 is illustrated in a specific schematic depiction. The light generation system 1000 includes actuators 400 for each of a first light generation device 1100, a second light generation device 1200, and a first polarizing beam splitter 1515. In an embodiment, one or more actuators 400 may be configured to rotate one or more of the first light generation device 1100 (especially a first laser array), the second light generation device 1200 (especially a second laser array), and the first polarizing beam splitter 1515. In an embodiment, the actuators 400 may be specifically configured to rotate one or more of the first light generation device 1100, the second light generation device 1200, and the first polarizing beam splitter 1515 relative to each other, such that a first angle θ1 and a second angle θ2 may (individually) be selected from the range of 1-89°. Therefore, in an embodiment, actuator 400 can be configured to adjust one or more of the first angle θ1 and the second angle θ2 by rotating and orienting one or more of the first light generating device 1100, the second light generating device 1200, and the first polarizing beam splitter 1515. Therefore, in an embodiment, the first angle θ1 and the second angle θ2 can thus be changed during operation of the light generating system 1000. Therefore, in an embodiment, control system 300 can be configured to control actuator 400. Specifically, in an embodiment, control system 300 can be configured to individually control one or more actuators 400. Therefore, in an embodiment, control system 300 can be configured to maintain a predetermined color point of system light 1001 over time.

[0141] Figure 4 An embodiment of a luminaire 2 including the light generating system 1000 as described above is schematically depicted. Reference numeral 301 indicates a user interface that can be functionally coupled to a control system 300, which is included in or functionally coupled to the light generating system 1000. Figure 4An embodiment of a lamp 1 including a light generating system 1000 is also schematically depicted. Reference numeral 3 indicates a projector device or projector system, which can be used, for example, to project images onto a wall, and may also include the light generating system 1000. Therefore, Figure 4 An embodiment of a lighting device 1200 selected from the group consisting of a lamp 1, a luminaire 2, a projector device 3, a disinfection device, a photochemical reactor, and an optical wireless communication device is schematically depicted, comprising a light generating system 1000 as described herein. In embodiments, such a lighting device may be a lamp 1, a luminaire 2, a projector device 3, a disinfection device, or an optical wireless communication device. Light emanating from the lighting device 1200 is indicated by reference numeral 1201. The lighting device light 1201 may consist substantially of system light 1001, and therefore may be system light 1001 in specific embodiments. Reference numeral 1300 indicates a space, such as a room. Reference numeral 1305 indicates a floor, reference numeral 1310 indicates a ceiling; and reference numeral 1307 indicates a wall.

[0142] The term "a plurality of" means two or more. The terms "substantially" or "essentially," and similar terms, will be understood by those skilled in the art. The terms "substantially" or "essentially" may also include embodiments having "completely," "entirely," "all," etc. Therefore, in embodiments, the adjective "substantially" or "essentially" may also be removed. Where applicable, the terms "substantially" or "essentially" may also refer to 90% or higher, such as 95% or higher, especially 99% or higher, even more especially 99.5% or higher, including 100%. The term "comprising" also includes embodiments in which the term "comprising" means "consisting of." The term "and / or" particularly refers to one or more items mentioned before and after "and / or." For example, the phrase "item 1 and / or item 2" and similar phrases may refer to one or more of item 1 and item 2. The term "comprising" in one embodiment may mean "consisting of," but in another embodiment it may also mean "containing at least the defined substance and optionally one or more other substances." The use of the verb "comprising" and its variations does not exclude the presence of elements or steps other than those stated in the claims. Unless the context clearly requires otherwise, throughout the specification and claims, the words “comprising,” “including,” etc., should be interpreted in an inclusive sense, rather than an exclusive or exhaustive sense; that is, in the sense of “including but not limited to.” The article “a” or “an” preceding an element does not exclude the presence of a plurality of such elements. Furthermore, the terms first, second, third, etc., in the specification and claims are used to distinguish similar elements and are not necessarily used to describe an order or chronological order. It should be understood that the terms thus used are interchangeable where appropriate, and the embodiments of the invention described herein can operate in orders other than those described or shown herein.

[0143] These devices, apparatuses, or systems may be described herein during operation. Those skilled in the art will understand that the invention is not limited to the method of operation, or the devices, apparatuses, or systems in operation.

[0144] It should be noted that the above embodiments are illustrative and not limiting of the invention, and those skilled in the art will be able to devise many alternative embodiments without departing from the scope of the appended claims. Any reference numerals placed between parentheses in the claims should not be construed as limiting the claims.

[0145] This invention can be implemented by hardware comprising several different elements and by a computer that is appropriately programmed. In the device, apparatus, or system claims that enumerate several means, several of these means can be implemented by the same hardware. The fact that certain measures are recited in mutually different dependent claims does not imply that combinations of these measures cannot be advantageously used. In another aspect, the invention (therefore) provides a software product that, when run on a computer, enables the implementation of one or more embodiments of the methods described herein.

[0146] The present invention also provides a control system that can control a device, apparatus, or system, or perform the methods or processes described herein. Furthermore, the present invention provides a computer program product that, when functionally coupled to or operated on a device, apparatus, or system, or a computer included in the device, apparatus, or system, controls one or more controllable elements of such device, apparatus, or system.

[0147] The present invention is also applicable to devices, apparatuses, or systems that include one or more features described in the specification and / or shown in the drawings. The present invention also relates to methods or processes that include one or more features described in the specification and / or shown in the drawings.

[0148] The various aspects discussed in this patent can be combined to provide additional advantages. Furthermore, those skilled in the art will understand that embodiments can be combined, and more than two embodiments can be combined. Additionally, some features can form the basis of one or more divisional applications.

[0149] Therefore, in an embodiment, the present invention provides a light generation system having factory-level rotation of the polarization direction of the light generation device and the polarization beam splitter.

Claims

1. A light generating system (1000), comprising a first light generating device (1100), a second light generating device (1200), a luminescent material (200), one or more diffusers (710), a main beam splitter (1505), a dichroic beam splitter (1515, 2515), a light outlet (1090), and a control system (300); wherein: - The first light generating device (1100) includes a plurality of first light generating devices (110), the plurality of first light generating devices (110) being configured to generate light with a first peak wavelength (λ). p1 The first light generating device (111) includes a first laser group, which includes the plurality of first light generating devices (110); wherein the first light generating device (110) includes a first laser diode; - The second light generating device (1200) includes a plurality of second light generating devices (120), the plurality of second light generating devices (120) being configured to generate light with a second peak wavelength (λ). p2 The second light generating device (121) includes a second laser group, which includes the plurality of second light generating devices (120); wherein the plurality of second light generating devices (120) includes a second laser diode; wherein ; - The light-emitting material (200) is configured to (a) be in a light-receiving relationship with the first light-generating device (1100) and be configured to convert at least a portion of the first device light (111) into light-emitting material light (201a) generated by the first device light, and (b) be in a light-receiving relationship with the second light-generating device (1200) and be configured to convert at least a portion of the second device light (121) into light-emitting material light (201b) generated by the second device light. - The light generation system (1000) is configured such that the first device light (111) received by the main beam splitter (1505) includes polarized light and the second device light (121) received by the main beam splitter (1505) includes polarized light; wherein the main beam splitter (1505) is configured to (a) direct a primary first portion of the first device light (111) to the light-emitting material (200) and a secondary first portion of the first device light (111) to at least one of the one or more diffusers (710), and (b) direct a primary second portion of the second device light (121) to the light-emitting material (200) and a secondary second portion of the second device light (121) to at least one of the one or more diffusers (710); - The first dichroic beam splitter (1515) is configured to (a) guide at least a portion of the first device light (111) or at least a portion of the second device light (121) to the main beam splitter (1505), and (b) guide at least a portion of the luminescent material light (201a, 201b) to the auxiliary dichroic beam splitter (2515). - At least one of the one or more diffusers (710) is configured to receive light from the first light generating device (1100) and is configured to convert at least a portion of the sub-first portion of the first device light (111) into diffuse light (711a) based on the first device light, and at least one of the one or more diffusers (710) is configured to receive light from the second light generating device (1200) and is configured to convert at least a portion of the sub-second portion of the second device light (121) into diffuse light (711b) based on the second device light. - The auxiliary dichroic beam splitter (2515) is configured to guide one or more of the following along the same optical path to the light outlet (1090) of the light generation system (1000): (a) luminescent material light (201a) and diffused device light (711a) based on the first device light generated by the first device light, and (b) luminescent material light (201b) and diffused light (711b) based on the second device light generated by the second device light. - The light generating system (1000) is configured to generate system light (1001), the system light (1001) comprising one or more of the following: (a) system light (1001a) generated by a first device light, the system light (1001a) generated by the first device light comprising at least a portion of the diffuse light (711a) based on the first device light and at least a portion of the luminescent material light (201a) generated by the first device light; and (b) system light (1001b) generated by a second device light, the system light (1001b) generated by the second device light comprising at least a portion of the diffuse light (711b) based on the second device light and at least a portion of the luminescent material light (201b) generated by the second device light; wherein the system light (1001a) generated by the first device light and the system light (1001b) generated by the second device light are white light; and - The control system (300) is configured to control the first light generating device (1100) and the second light generating device (1200).

2. The light generation system (1000) according to claim 1, wherein the system light (1001a) generated by the first device light has a first color point, wherein the system light (1001b) generated by the second device light has a second color point, wherein the first color point and the second color point are within 20 standard deviations of color matching with a blackbody trajectory and within 20 standard deviations of color matching with each other.

3. The light generating system (1000) according to any one of the preceding claims, wherein the light generating system (1000) is configured such that the system light (1001) is white light having a correlated color temperature of at least 5000K.

4. The light generating system (1000) according to any one of the preceding claims, wherein the light generating system (1000) is configured such that (a) the main first portion of the first device light (111) received by the light-emitting material (200) has a main first portion radiative flux Ω. 11 (b) The sub-first portion of the first device light (111) received by at least one of the one or more diffusers (710) has a sub-first portion radiant flux Ω. 12 (c) The main second portion of the second device light (121) received by the luminescent material (200) has a main second portion radiative flux Ω. 21 (d) The second portion of the second device light (121) received by at least one of the one or more diffusers (710) has a second portion radiant flux Ω. 22 ; and (e) 0.9 ≤ (Ω) 11 / Ω 12 ) / (Ω 21 / Ω 22 )≤1.

1.

5. The light generating system (1000) according to any one of the preceding claims, wherein the control system (300) is configured to: (a) control the first device light (111) according to (a1) diffuse light (711b) based on the second device light and (a2) luminescent material light (201b) generated by the second device light, and (b) control the second device light (121) according to (b1) diffuse light (711a) based on the first device light and (b2) luminescent material light (201a) generated by the first device light.

6. The light generating system (1000) according to any one of the preceding claims, wherein the main beam splitter (1505) includes a first polarization beam splitter (1525), wherein the first polarization beam splitter (1525) has a first polarization axis (A). p The first device light (111) received by the first polarization beamsplitter (1525) has a first device light polarization axis (A1), and the second device light (121) received by the first polarization beamsplitter (1525) has a second device light polarization axis (A2); wherein for the two device light polarization axes (A1, A2), the following applies: they are neither parallel to nor perpendicular to the polarization axis (A1, A2) of the first polarization beamsplitter. p ).

7. The light generation system (1000) according to claim 6, wherein the first device light (111) comprises x1% s-polarized light and 100-x1% p-polarized light, wherein the second device light (121) comprises 100-x1% s-polarized light and x1% p-polarized light; wherein the polarization axis (A1) of the first device light is parallel to the polarization axis (A) of the first polarization beam splitter. p The second device has a first angle (θ1), and the optical polarization axis (A2) of the second device is perpendicular to the polarization axis (A) of the first polarization beam splitter. p ) has a second angle (θ2), where θ1 + θ2 = 90°, and where 1 <x1<99。 8. The light generating system (1000) according to any one of claims 1 to 7, wherein the light-emitting material (200) is configured in a transmission mode.

9. The light generating system (1000) according to any one of claims 1 to 8, wherein the following applies: (i) the luminescent material (200) is configured in the reflection mode, and (ii) at least one of the one or more diffusers (710) is configured in the reflection mode.

10. The light generation system (1000) according to any one of the preceding claims, wherein at least one of the one or more diffusers (710) comprises a polarization-maintaining diffuser.

11. The light generation system (1000) of claim 10, wherein at least one of the one or more diffusers (710) is configured in the reflection mode; wherein the light generation system (1000) further comprises a polarization changing element (810) configured in the optical path between the main beam splitter (1505) and the polarization-maintaining diffuser (710).

12. The light generation system (1000) according to claim 11, wherein the polarization changing element (810) comprises a λ / 4 waveplate for one or more wavelengths of the first device light (111) and one or more wavelengths of the second device light (121).

13. The light generating system (1000) according to any one of claims 1 to 12, comprising a single diffuser (710).

14. The light generating system (1000) according to any one of claims 1 to 12, comprising a first diffuser (710a), a first polarization changing element (810a), a second polarization beam splitter (2525), a second diffuser (710b), a second polarization changing element (810b), a third polarization beam splitter (3525), and a fourth polarization beam splitter (4525); wherein: - The second polarization beamsplitter (2525) is disposed downstream of the main beamsplitter (1505), wherein the main beamsplitter (1505) includes the first polarization beamsplitter (1525); wherein the second polarization beamsplitter (2525) is configured to: (a) guide at least a portion of the first device light (111) and at least a portion of the second device light (121) to the first diffuser (710a), and (b) guide at least a portion of the diffuse light (711a) based on the first device light and at least a portion of the diffuse light (711b) based on the second device light to the auxiliary dichroic beamsplitter (2515). - The first polarization changing element (810a) is configured in the optical path between the second polarization beam splitter (2525) and the first diffuser (710a); - The third polarization beamsplitter (3525) is disposed downstream of the second polarization beamsplitter (2525); wherein the third polarization beamsplitter (3525) is configured to (a) guide at least a portion of the first device light (111) and at least a portion of the second device light (121) to the second diffuser (710b), and (b) guide at least a portion of the diffuse light (711a) based on the first device light and at least a portion of the diffuse light (711b) based on the second device light to the fourth polarization beamsplitter (4525). - The second polarization changing element (810b) is disposed in the optical path between the third polarization beam splitter (3525) and the second diffuser (710b); - The auxiliary dichroic beamsplitter (2515) is disposed downstream of the first dichroic beamsplitter (1515) and the second polarization beamsplitter (2525); wherein the auxiliary dichroic beamsplitter (2515) is configured to (a) guide at least a portion of the diffuse light (711a) based on the first device light and at least a portion of the diffuse light (711b) based on the second device light to the fourth polarization beamsplitter (4525), and (b) guide at least a portion of the luminescent material light (201a, 201b) to the fourth polarization beamsplitter (4525); and - The fourth polarization beam splitter (4525) is disposed downstream of the auxiliary dichroic beam splitter (2515) and the third polarization beam splitter (3525), and is configured to guide at least a portion of (a) the diffuse light (711a) based on the first device light and / or at least a portion of the diffuse light (711b) based on the second device light, and (b) at least a portion of the light emitting material light (201a, 201b) to the light outlet (1090).

15. A lighting device (1200) selected from the group consisting of: lamps (1), luminaires (2), projector devices (3), disinfection devices, photochemical reactors and optical wireless communication devices, said lighting device comprising a light generating system (1000) according to any one of the preceding claims.

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