Laser phosphor-based device with polarization dependent beam shaping

Abstract

The invention provides a light generating system (1000) comprising one or more light generating devices (100), a first luminophor (210), a second luminophor (220), an optical arrangement (400), a collimator (500), a heat transfer system (700) and a control system (300), where: the one or more light generating devices (100) may be configured to generate device light (101) having a first wavelength ([lambda] 1) and having controllable polarization, wherein the one or more light generating devices (100) comprise one or more solid state light sources; wherein the collimator (500) may have a first end (501) and a second end (502), and wherein the collimator (500) may taper from the second end (502) to the first end (501); wherein the first light emitter (210) may be configured to convert at least a portion of light having a first wavelength ([lambda] 1) into first luminescent material light (211); wherein the second light emitter (220) may be configured to convert at least a portion of the light having the first wavelength ([lambda] 1) into second luminescent material light (221); wherein the first luminophor (210) and the second luminophor (220) may be configured in the collimator (500), where the first luminophor (210) may be configured closer to the first end (501) than the second luminophor (220), and the second luminophor (220) may be configured closer to the second end (502) than the first luminophor (210), and wherein the heat transfer system (700) is configured to transfer heat from one or more of the first light emitter (210) and the second light emitter (220); wherein the optical device (400) can be configured to direct the device light (101) to the first light emitter (210) and / or the second light emitter (220) according to the polarization of the device light (101); wherein the light generating system (1000) may be configured to generate system light (1001) comprising one or more of first luminescent material light (211) and second luminescent material light (221); and wherein the control system (300) may be configured to control the polarization of the device light (101).

Description

Technical Field

[0001] The present invention relates to a light generating system and also to a lighting device (comprising the light generating system). Background Art

[0002] Laser light sources are known in the art. For example, US2021156526A1 describes a light source device, including a laser light source for emitting a first light, and a refractive optical element arranged on a light exit path of the laser light source and configured to guide the first light to a light conversion device. The refractive optical element includes a light exit surface, and the light reflected by the light exit surface of the refractive optical element is deflected toward the light conversion device for exit. The light conversion device is arranged on the light exit side of the refractive optical element, and its incident surface is the same surface as the light exit surface. The medium of the incident surface of the light conversion device has a Brewster angle α, and the exit light of the refractive optical element is obliquely incident on the light conversion device at an incident angle of α-20° to α+10°. In addition, a light collection device is arranged on the light exit side of the light conversion device, and is configured to collect light emitted from the light conversion device and emit the light. Summary of the invention

[0003] High brightness light sources are used in a variety of applications, including spotlights, stage lighting, headlights, home and office lighting, and automotive lighting. For this purpose, laser phosphor technology can be used, where a laser provides the laser light and a remote phosphor converts the laser light into converted light.

[0004] A relatively simple way to create white light using lasers is to use blue lasers combined with phosphorescent converted light to create white light. However, current laser lighting devices may not be able to produce strong beams with reliable and high performance. In particular, current laser lighting devices may not be able to produce laser beams with controllable beam shapes in a reliable and simple way. Other problems associated with such laser light sources may come from the desire to create compact, high-power devices.

[0005] Therefore, one aspect of the present invention is to provide an alternative (laser-based) light generating system which preferably further at least partially obviates one or more of the above disadvantages.An object of the present invention may be to overcome or ameliorate at least one disadvantage of the prior art, or to provide a useful alternative.

[0006] According to a first aspect, the present invention provides a light generating system ("system") comprising one or more light generating devices (or "radiation generating devices"), a first light emitter, a second light emitter, an optical device, a collimator and a control system. The one or more light generating devices may be particularly configured to generate device light having a first wavelength. In addition, the one or more light generating devices include one or more solid-state light sources. More particularly, the one or more solid-state light sources may include a laser light source. In particular, the collimator has a first end and a second end. In addition, in particular, the collimator may taper from the second end to the first end. In an embodiment, the first light emitter may be configured to convert at least a portion of the light having a first wavelength (λ1) into a first luminescent material light. However, in an embodiment, the second light emitter may be configured to convert at least a portion of the light having a first wavelength (λ1) into a second luminescent material light. In particular, the first light emitter and the second light emitter may be configured in a collimator. In an embodiment, the first light emitter may be configured to be closer to the first end than the second light emitter. In addition, the system may optionally include a heat transfer system. For example, the heat transfer system may be configured to transfer heat from one or more of the first light emitter and the second light emitter. More particularly, in an embodiment, the first luminous body and / or the second luminous body may be configured to be in thermal contact with one or more heat sinks. In an embodiment, the optical device may be configured to guide the device light to the first luminous body and / or the second luminous body. Furthermore, in particular, the light generating system may be configured to generate system light comprising one or more of the first luminescent material light and the second luminescent material light. In an embodiment, the beam shape of the system light may be controllable. In further specific embodiments, the control system may be configured to control the system light, in particular by controlling one or more light generating devices.Therefore, the present invention provides a light generating system in an embodiment, which includes one or more light generating devices, a first light emitting body, a second light emitting body, an optical device, a collimator, a control system and an optional heat transfer system; wherein: (A) one or more light generating devices are configured to generate device light having a first wavelength (λ1); wherein one or more light generating devices include one or more solid-state light sources, wherein one or more solid-state light sources include a laser light source; (B) the collimator has a first end and a second end, wherein the collimator tapers from the second end to the first end; (C) the first light emitting body is configured to convert at least a portion of the light having the first wavelength (λ1) into a first luminescent material light; and (D) the second light emitting body is configured to convert the light having the first wavelength (λ1) into a first luminescent material light. At least a portion of the light having a first wavelength (λ1) is converted into a second luminescent material light; (E) the first luminophore and the second luminophore are arranged in a collimator, wherein the first luminophore is arranged closer to the first end than the second luminophore; (F) the heat transfer system is configured to transfer heat from one or more of the first luminophore and the second luminophore; (G) the optical device is configured to guide the device light to the first luminophore and / or the second luminophore; (H) the light generating system is configured to generate system light including one or more of the first luminescent material light and the second luminescent material light; in particular, wherein the system light has a controllable beam shape; and (I) the control system is configured to control the system light by controlling one or more light generating devices (100). In a particular embodiment, the control system can (thereby) control the beam shape of the system light. According to one (other) aspect, the present invention provides a light generating system ("system"), which includes one or more light generating devices (or "radiation generating devices"), a first luminophore, a second luminophore, an optical device, a collimator and a control system. The one or more light generating devices can be particularly configured to generate device light having a first wavelength λ1. More particularly, one or more light generating devices may have controllable polarization. Furthermore, in an embodiment, one or more light generating devices may include one or more solid-state light sources. The collimator may particularly have a first end and a second end. More particularly, the collimator may taper from the second end to the first end. In an embodiment, the first luminous body may be configured to convert at least a portion of light having a first wavelength λ1 into a first luminescent material light. Furthermore, in an embodiment, the second luminous body may be configured to convert at least a portion of light having a first wavelength λ1 into a second luminescent material light. The first luminous body and the second luminous body may be particularly configured in the collimator. More particularly, the first luminous body may be configured to be closer to the first end than the second luminous body. Therefore, the second luminous body may be configured to be closer to the second end than the first luminous body. Furthermore, in an embodiment, the system may further include a heat transfer system configured to transfer heat from one or more of the first luminous body and the second luminous body. In a particular embodiment, the heat transfer system may include one or more heat sinks.However, in further embodiments, the first luminescent body and the second luminescent body may be configured to be in thermal contact with one or more heat sinks. The optical device may be configured to direct the device light to the first luminescent body and / or the second luminescent body according to the polarization of the device light. In addition, the light generating system may be configured to generate system light including one or more of the first luminescent material light and the second luminescent material light. Furthermore, in an embodiment, the control system may be configured to control the polarization of the device light. In particular, the control system may be configured to control the beam shape of the system light. Therefore, in an embodiment, the system light may have a controllable beam shape. In a specific embodiment, the present invention provides a light generating system, comprising one or more light generating devices, a first light emitter, a second light emitter, an optical device, a collimator, an optional heat transfer system and a control system: wherein the one or more light generating devices can be configured to generate device light having a first wavelength λ1 and controllable polarization; wherein the one or more light generating devices can include one or more solid-state light sources; wherein the collimator can have a first end and a second end, wherein the collimator can taper from the second end to the first end; wherein the first light emitter can be configured to convert at least a portion of the light having the first wavelength λ1 into a first light emitting material light; wherein the second light emitter can be configured to convert at least a portion of the light having the first wavelength λ1 into a second light emitting material light; wherein the first light emitter and the second light emitter can be configured in the collimator, wherein the first light emitter may be configured to be closer to the first end than the second light emitter, and the second light emitter may be configured to be closer to the second end than the first light emitter; wherein the heat transfer system is configured to transfer heat from one or more of the first light emitter and the second light emitter (in an embodiment, the first light emitter and / or the second light emitter may be configured to be in thermal contact with one or more heat sinks); wherein the optical device may be configured to direct device light to the first light emitter and / or the second light emitter according to the polarization of the device light; wherein the light generating system may be configured to generate system light including one or more of the first luminescent material light and the second luminescent material light; wherein in a specific embodiment, the system light has a controllable beam shape, and wherein the control system may be configured to control the polarization of the device light (and may (thereby) (also) control the beam shape of the system light in an embodiment). In an embodiment, the control system may be configured to control the system light, such as its beam shape, by controlling one or more light generating devices.

[0007] With the present system, the functionality and performance of laser phosphor based lighting can be improved in a reliable and simple manner. In particular, a relatively cheap, reliable and simple laser based light generating system can be provided, e.g. for stage lighting. Additionally, the present system can provide dynamic beam shaping of a (laser based) light beam. Thus, the present invention provides, among other things, a laser phosphor based device with polarization dependent beam shaping. The present invention allows controlling the beam shape without moving elements.

[0008] As described above, in embodiments, the light generating system may include one or more light generating devices, a first light emitter, a second light emitter, an optical device, a collimator, and a control system. Some general embodiments of the system are first described below, followed by some more specific embodiments.

[0009] In an embodiment, the light generating system may comprise one or more (types of) light generating devices, eg a plurality of first light generating devices and / or second light generating devices.The one or more light generating devices may in particular be configured to generate device light.

[0010] The device light may in particular have a first wavelength λ1. In an embodiment, the first wavelength λ1 may be selected from the range of 380-780 nm, for example from the range of 380-520 nm. Thus, in an embodiment, the device light may be visible light, in particular colored light. In a particular embodiment, the device light may comprise blue light, i.e. light having a first wavelength λ1 selected from the range of 440-490 nm. Further embodiments of the light generating device are described below.

[0011] In a more specific embodiment, one or more light generating devices may be configured to generate blue (polarized) laser radiation. For example, in combination with a yellow emitting phosphor, this may provide white light (in an operating mode). However, in further embodiments, the device light may have a first wavelength λ1 outside the visible wavelength range, i.e. the first wavelength λ1 may be in the UV or IR wavelength range. However, in particular, λ1 may be in the visible wavelength range, more specifically in the blue wavelength range.

[0012] Using the optical arrangement and the device light, it is possible to select which of the first and second light emitters is addressed with the device light. Several options are proposed below, some of which are based on polarized light, while others do not necessarily include polarized light.

[0013] One or more light generating devices may be particularly configured to generate device light with controllable polarization, i.e., the polarization state of the device light is controllable. In an embodiment, the polarization state of the device light may include s-polarized radiation and / or p-polarized radiation. In a particular embodiment, the polarization state of the device light may include a combination of s-polarized and p-polarized radiation. In particular, the polarization state is controllable, i.e., it can be selected whether the device light has p-polarization or s-polarization.

[0014] In an embodiment, radiation at a particular wavelength may be s-polarized when 90% of the radiation at the particular wavelength has s-polarization (e.g., at least 95%, such as substantially 100%). Similarly, in an embodiment, radiation at a particular wavelength may be p-polarized when 90% of the radiation at the particular wavelength has p-polarization (e.g., at least 95%, such as substantially 100%). Thus, in an embodiment, s-polarized radiation may have substantially 100% s-polarization, while in an embodiment, p-polarized radiation may have substantially 100% p-polarization.

[0015] Thus, in an embodiment, the device light may be at least 95% s-polarized during the first operating mode of the light generating system and may be at least 95% p-polarized during the second operating mode of the light generating system.

[0016] In other embodiments, the polarization state of the device light may include right-hand circular polarization (RHC) and / or left-hand circular polarization (LHC).

[0017] In other embodiments, the polarization state of the device light may include p-polarized light and s-polarized light.

[0018] It is also possible to provide polarization for unpolarized light. This will be described further below.

[0019] In particular, the one or more light generating devices may comprise one or more light sources, such as one or more LED light sources, one or more laser diodes and / or one or more superluminescent diode light sources, see below. In particular, the one or more light generating devices may comprise one or more solid-state light sources, such as one or more laser diodes.

[0020] The system also includes a collimator. The collimator can be used to beam shape the light generated by the first light emitter and / or the second light emitter and optionally the remaining device light. This will be further described below.

[0021] The collimator may have a first end and a second end. In particular, the collimator may taper from the second end to the first end. In an embodiment, the collimator may also have a collimator axis O centered within the collimator. c (See below). The first and second ends of the collimator may be arranged such that the collimator axis O cAn imaginary connection between the first end and the second end can be formed. In particular, the second end can be arranged downstream of the first luminous body and the second luminous body. More particularly, in an embodiment, the second end can be an opening (hollow reflector) or a plane (TIR collimator). In addition, the luminescent material light from the first luminous body and / or the second luminous body and optionally the device light can basically only escape from the collimator via the second end. The first end can in particular be arranged upstream of the first luminous body and the second luminous body. In a specific embodiment, the first end can include a cavity (see also below).

[0022] Furthermore, in an embodiment, the cross-sectional shape of the collimator may be selected from the group consisting of an n-sided prism shape (eg square, hexagonal) or a cylinder (circular cross-sectional shape) with n being at least 4. However, other shapes are also possible.

[0023] In particular, the collimator may have a plurality of c Defined cross-sectional area A o . Collimator cross-sectional area A o In particular, the collimator axis O c In an embodiment, the collimator cross-sectional area A o Available from 10-5000mm 2 Select from a range of, for example, 50-1000mm 2 Select from a range of, for example, 100-500mm 2 In particular, the collimator cross-sectional area A o Can be at least 5mm 2 , for example at least 10 mm 2 , for example at least 50 mm 2 In addition, the collimator cross-sectional area A o Can be up to 5000mm 2 , e.g. up to 1000mm 2 , e.g. up to 500mm 2 The cross-sectional area may be largest at the second end and smallest, or even zero, at the first end.

[0024] In an embodiment, the first light emitter may be a phosphor tile, a phosphor disc or a phosphor plate.In an embodiment, the first light emitter may be a (relatively small) tile.

[0025] Furthermore, in embodiments, the first luminous body may be configured to partially convert the device light. Thus, the first luminous body may also be configured in a reflection or transmission mode (see below). In other embodiments, the first luminous body may be configured to substantially completely convert the device light. The first luminous body comprises a first luminescent material. Thus, the first luminous body may be configured to convert at least a portion of the light having a first wavelength λ1 into first luminescent material light. The first luminous body may in particular be configured to convert at least 60% of the light having a first wavelength λ1 under vertical irradiation into first luminescent material light, such as at least 70%, for example at least 80%, in particular at least 90%, more in particular at least 95%, for example at least 99%, including 100%.

[0026] In an embodiment, the second light emitter may be a phosphor tile, a phosphor disc or a phosphor plate.In an embodiment, the second light emitter may be a (relatively small) tile.

[0027] Furthermore, in embodiments, the second light emitter may be configured to partially convert the device light. Thus, the second light emitter may also be configured in a reflection or transmission mode (see below). In other embodiments, the second light emitter may be configured to substantially completely convert the device light. The second light emitter comprises a second luminescent material. Thus, the second light emitter may be configured to convert at least a portion of the light having the first wavelength λ1 into second luminescent material light. The second light emitter may be particularly configured to convert at least 60% of the light having the first wavelength λ1 under vertical irradiation into second luminescent material light, such as at least 70%, such as at least 80%, particularly at least 90%, more particularly at least 95%, such as at least 99%, including 100%.

[0028] Furthermore, in an embodiment, the light generating system may include a heat transfer system. In particular, the heat transfer system may be configured to transfer heat from one or more of the first light emitter and the second light emitter. For example, the heat transfer system may include one or more heat sinks (see below). Thus, in certain embodiments, the first light emitter and the second light emitter may be configured to be in thermal contact with one or more heat sinks. For example, in an embodiment, the first and second light emitters may be configured to be in thermal contact with the same one or more heat sinks (e.g., the same one heat sink). In other embodiments, the first and second light emitters may be configured to be in thermal contact with two or more separate heat sinks.

[0029] The luminaire can be configured in a reflective mode such that the luminaire substantially completely reflects light that is not converted by the luminaire. In addition, the luminaire can be configured in a transmissive mode such that the luminaire substantially completely transmits light that is not converted by the luminaire. Thus, the first and / or second luminaire can be transparent or light scattering.

[0030] Therefore, the luminescent material can be configured in a reflection mode or a transmission mode. In the transmission mode, the light source light can be mixed into the luminescent material light relatively easily, which is useful for producing the desired spectral power distribution. In the reflection mode, thermal management may be easier because a large part of the luminescent material can be in thermal contact with a thermally conductive element (such as a heat sink or a heat diffuser). In the reflection mode, a part of the light source light can be reflected by the luminescent material and / or the reflector in an embodiment and can be mixed into the luminescent material light. The reflector (in the reflection mode) can be configured downstream of the luminescent material.

[0031] In particular, the luminescent material may be comprised by a luminophore. The luminophore may be a layer, such as a self-supporting layer. The luminophore may also be a coating. The luminophore may also include a luminescent coating on a support (in particular a light-transmitting support in a transmission mode, or a reflective support in a reflection mode). In particular, the luminophore may be substantially self-supporting. In an embodiment, the luminescent material may be provided as a luminophore, such as a luminescent single crystal, a luminescent glass or a luminescent ceramic body. Such a body may be represented as a "converter body" or a "luminophore". In an embodiment, the luminophore may be a luminescent single crystal or a luminescent ceramic body. For example, in an embodiment, a garnet luminescent material including cerium may be provided as a luminescent single crystal or a luminescent ceramic body. In other embodiments, the luminophore may include a light-transmitting body in which the luminescent material is embedded. For example, the luminophore may include a glass body in which the luminescent material is embedded. Alternatively, the glass itself may be luminescent. In other embodiments, the luminophore may include a polymer body in which the luminescent material is embedded.

[0032] Specifically, the first and second luminous bodies can be configured to be in a light receiving relationship with one or more light generating devices. However, the first luminous body is not necessarily configured to be in a light receiving relationship with the same light generating device as the second luminous body. In embodiments, this may be the case, while in other embodiments it may not be the case.

[0033] The term "light-receiving relationship" or "light-receiving relationship" and similar terms may indicate that the article may receive light from the light source (such as a light generating device or light generating element or light generating system) during operation of the light source. Therefore, the article may be arranged downstream of the light source. An optical device may be arranged between the light source and the article.

[0034] The terms "upstream" and "downstream" relate to the arrangement of items or features relative to the propagation of light from a light generating device (here particularly a light generating device), wherein, relative to a first position in a light beam from the light generating device, a second position in the light beam closer to the light generating device is "upstream" and a third position in the light beam farther from the light generating device is "downstream".

[0035] The term "radiative coupling" or "optical coupling" or "radiatively coupled" may particularly mean that (i) a light generating element (e.g. a light source) and (ii) another item or material are associated with each other so that at least a portion of the radiation emitted by the light generating element is received by the item or material. In other words, the item or material is configured to be in a light receiving relationship with the light generating element. At least a portion of the radiation of the light generating element will be received by the item or material. This may be direct in embodiments, such as the item or material being in physical contact with (the light emitting surface of) the light generating element. This may be through a medium, such as air, gas or liquid or solid light-conducting material, in embodiments. In embodiments, one or more optical devices, such as lenses, reflectors, optical filters, may also be configured in the light path between the light generating element and the item or material. As mentioned above, the term "in a light receiving relationship" does not exclude the presence of intermediate optical elements, such as lenses, collimators, reflectors, dichroic mirrors, etc. In embodiments, the terms "light receiving relationship" and "downstream" are essentially synonymous.

[0036] In particular, the luminescent material may be configured to convert at least part of the device light into luminescent material light. More particularly, the luminescent material light may comprise visible light, for example having a color point such as yellow or green or red, in particular in the visible light.

[0037] The first light emitter and the second light emitter may be configured in a collimator. In particular, the first light emitter may be configured closer to the first end than the second light emitter, and thus, the second light emitter may be configured closer to the second end than the first light emitter. Therefore, in an embodiment, the collimator may be hollow or may include a cavity.

[0038] In an embodiment, the collimator may have a focal point. In particular, in an embodiment, the focal point may be closer to the first end of the collimator than to the second end. The collimator may also have a focal point that is parallel to the collimator axis O. c Parallel collimator height h. In particular, the height can be defined starting from the first end. The first light emitter can be configured in a position closer to the first end in the collimator. The second light emitter can be configured in a position closer to the second end in the collimator. In particular, in an embodiment, the first light emitter can be arranged between 0-x% of the collimator height h, wherein x can be at most 35%, for example at most 25%. Furthermore, in an embodiment, the second light emitter can be arranged between y-100% of the collimator height h, wherein y can be at least 40%, for example at least 50%. Furthermore, in an embodiment, x and y can differ by at least 10 percentage points, for example at least 25 percentage points, in particular at least 40 percentage points.

[0039] Thus, in an embodiment, the first light emitter may have a first distance d1 to the focus. Similarly, the second light emitter may have a second distance d2 to the focus. In an embodiment, the first distance d1 and the second distance d2 may be selected from the range of 2 - 200 mm, for example from the range of 5 - 100 mm, for example from the range of 10 - 50 mm, but particularly d1 < d2. In particular, in an embodiment, the first distance d1 may be at most 150 mm, for example at most 100 mm, particularly at most 50 mm. Additionally, in an embodiment, the first distance d1 may be selected from the range of 0 - 20 mm, for example 0 - 10 mm. In a specific embodiment, the first distance d1 may be zero, i.e., the first light emitter may be configured at the focus. Similarly, in an embodiment, the second distance d2 may be at most 200 mm, for example at most 150 mm, such as at most 100 mm, especially at most 50 mm. Additionally, in an embodiment, the second distance d2 may be at least 2 mm, for example at least 5 mm, such as at least 10 mm, especially at least 15 mm. In particular, in an embodiment, these distances may be selected such that the first distance d1 may be significantly less than the second distance d2, i.e., d1 / d2 ≤ 0.25, for example d1 / d2 ≤ 0.1, such as d1 / d2 ≤ 0.05. In an embodiment, d1 = 0 mm, and d2 is at least 2 mm.

[0040] The first and / or second light emitter(s) may have a cross-sectional area relative to the collimator cross-sectional area A o (also see above). In particular, the cross-sectional area of the first and / or second light emitter(s) may be less than the (corresponding) collimator cross-sectional area A o . In particular, the first light emitter may have a first cross-sectional area A c defined perpendicular to the collimator axis O 11 . More particularly, the first cross-sectional area A 11 may be selected from the range of 1 - 100 mm 2 , for example from the range of 2 - 50 mm 2 , for example from the range of 5 - 20 mm 2 . The first cross-sectional area A 11 may be at least 0.5 mm 2 , for example at least 1 mm 2 , for example at least 2 mm 2 . Additionally, the first cross-sectional area A 11 may be at most 100 mm 2 , for example at most 50 mm 2 , for example at most 25 mm 2 . Additionally, the first cross-sectional area A 11 may be selected such that A 11 / Ao ≤0.2, for example, making A 11 / A o ≤0.1, especially when A 11 / A o ≤0.05.

[0041] Likewise, in an embodiment, the second light emitter may have a c The second cross-sectional area A is defined 12 In particular, the second cross-sectional area A 12 Available from 1-100mm 2 Select from a range of, for example, 2-50 mm 2 Select from a range of, for example, 5-20 mm 2 The second cross-sectional area A 12 Can be at least 0.5mm 2 , for example at least 1 mm 2 , for example at least 2 mm 2 In addition, the second cross-sectional area A 12 Maximum 100mm 2 , for example up to 50mm 2 , for example up to 25mm 2 In addition, the second cross-sectional area A 12 can be chosen so that A 12 / A o ≤0.2, for example, making A 12 / A o ≤0.1, especially when A 12 / A o ≤0.05.

[0042] In the embodiment, 0.25≤A 12 / A 11 ≤2. Therefore, in an embodiment, the first cross-sectional area and the second cross-sectional area may be equal in size. However, in other embodiments, the first cross-sectional area and the second cross-sectional area may be slightly different in size. In particular, in an embodiment, 0.5≤A 12 / A 11 ≤1.5, e.g. A 12 / A 11 =1.

[0043] In an embodiment, the first and / or second luminous body (or "body") may have a lateral dimension width or length (W or L) or diameter (D) and a thickness or height (H). In an embodiment, (i) D≥H or (ii) and W≥H and / or L≥H. In a specific embodiment, L≤10mm, such as in particular L≤5mm, more in particular L≤3mm, most in particular L≤2mm. In a specific embodiment, W≤10mm, such as in particular W≤5mm, more in particular W≤3mm, most in particular W≤2mm. In a specific embodiment, H≤10mm, such as in particular H≤5mm, more in particular H≤3mm, most in particular H≤2mm. In a specific embodiment, D≤10mm, such as in particular D≤5mm, more in particular D≤3mm, most in particular D≤2mm. In a specific embodiment, the body may have a thickness in the range of 50μm-1mm. In addition, the lateral dimension (width / diameter) of the body may be in the range of 100μm-10mm. In other specific embodiments, (i) D>H or (ii) W1>H and L1>H. In particular, the lateral dimensions (such as length, width and diameter) are at least 2 times, such as at least 5 times, greater than the height.

[0044] The first and / or second luminous body can have any shape. However, in general, the first and / or second luminous body can include two substantially parallel faces, defining the height (of the luminous body). In addition, the first and / or second luminous body can include an edge face, bridging the two substantially parallel faces. The edge face can be curved in one or two dimensions. The edge face can be planar. The first and / or second luminous body can have a rectangular or circular cross-section, although other cross-sections are also possible, such as hexagonal, octagonal, etc. Therefore, the first and / or second luminous body can have a circular cross-section, an elliptical cross-section, a square or a non-square rectangle. In an embodiment, the first and / or second luminous body can have an n-sided cross-section, where n is at least 3, such as 4 (square or rectangular cross-section), 5 (pentagonal cross-section), 6 (hexagonal cross-section), 8 (octagonal cross-section) or higher. The two substantially parallel faces can also be expressed as "main faces", because they can provide the maximum external area of ​​the first and / or second luminous body in particular. Perpendicular to the above cross-section can be another cross-section, which in an embodiment can be a rectangle. Thus, the first and / or second light emitter may, for example, have a cubic shape, a (non-cubic) cuboid shape, an n-sided prism shape with n being at least 5 (e.g. a pentagonal prism, a hexagonal prism) and a cylindrical shape. However, other shapes are also possible. In particular, the first and / or second light emitter may have a cuboid shape, a cylindrical shape or an n-sided prism shape, wherein 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 shape, the edge face may include four facets. In the case of a hexagonal prism shape, the edge face may include six facets.

[0045] In certain embodiments, the cross-sectional shape of the first and / or second illuminant may be selected according to the cross-sectional shape of the collimator. For example, in an embodiment, the cross-sectional shape of the collimator may be hexagonal or circular. In such an embodiment, the second illuminant may also have a hexagonal or circular cross-sectional shape, and the first illuminant may also have such a cross-sectional shape. However, in (other) embodiments, the cross-sectional shape of the first and / or second illuminant may also be selected independently of the cross-sectional shape of the collimator.

[0046] In an embodiment, the first light emitter and the second light emitter may have the same cross-sectional shape, i.e., the first light emitter and the second light emitter may have the same size. In other embodiments, the first light emitter and the second light emitter may have different cross-sectional shapes, i.e., the first light emitter and the second light emitter may have unequal sizes. For example, in a particular embodiment, the second light emitter may be relatively larger than the first light emitter.

[0047] The optical arrangement may include various optical elements, such as one or more of a retarder, a beam splitter, a shutter, a reflector and a lens (see below). The optical arrangement may be configured, among other things, to direct the device light to the first light emitter or the second light emitter.

[0048] In certain embodiments, the optical device can be configured to direct the device light to the first and second light emitters based on the polarization of the device light. For example, in embodiments, the optical device can be configured to direct the device light having p-polarization to the second light emitter. In another example, in embodiments, the optical device can be configured to direct the device light having s-polarization to the first light emitter. However, in embodiments, the optical device can also be configured to direct the device light to the first and / or second light emitters independently of the polarization of the device light. Such embodiments of the optical device will be discussed in further detail below.

[0049] Furthermore, the light generating system may be configured to generate system light. The system light may include at least one or more of the unconverted device light, the first luminescent material light and the second luminescent material light, in particular at least one or more of the first luminescent material light and the second luminescent material light.

[0050] In an operating mode, the system light may include unconverted device light. However, in another operating mode, the system light may at least partially (or even completely) include the first luminescent material light, i.e. the first luminescent body may be configured to at least partially convert the device light into the first luminescent material light. In further embodiments, the system light may at least partially (or even completely) include the second luminescent material light, i.e. the second luminescent body may be configured to at least partially convert the device light into the second luminescent material light. In further embodiments, the system light may at least partially (or even completely) include the first and second luminescent material light, i.e. the first and second luminescent bodies may be configured to at least partially convert the device light into the first and second luminescent material light (respectively).

[0051] Collimator axis O c (see above) can be defined as an imaginary line that defines the path along which the system light propagates out of the system through the collimator. In particular, the collimator axis may coincide with the direction of the system light where the radiant flux is highest.

[0052] As will be further explained below, different light emitters may be addressed using one or more light generating devices and an optical system. In an embodiment, the polarization of the device light may be controllable, by which, together with the optical system, the device light may be directed to the respective light emitter according to the polarization (of the device light of the one or more light generating devices). This may be achieved by one or more light generating devices. Alternatively or additionally, by using two or more light generating devices configured to generate device light (which is not necessarily polarized light) in combination with an optical system, the device light may be directed to the respective light emitter (depending on the two or more light generating devices).

[0053] In an embodiment, the device light may be directed to the respective light emitter depending on a beam splitter and a shutter comprised by the optical arrangement. In particular, the device light may be directed to the respective light emitter independently of the polarization of the device light. Specifically, the device light may even be non-polarized device light. Therefore, such an embodiment may require the use of one or more (dynamic) optical elements, for example selected from the group of a beam splitter, a shutter, a partial reflector or an electronically controlled mirror. Such (dynamic) optical elements may be controlled by a control system.

[0054] Thus, the control system may be configured to control the device light. In particular, the control system may be configured to control one or more of the polarization of the device light and the radiant flux of the device light. In an embodiment, the control system may be configured to control the polarization of the device light (see below).

[0055] Alternatively or additionally, the control system may be configured to control the radiant flux of one or more light generating devices. This may include controlling an on mode and an off mode, and optionally intermediate radiant fluxes.

[0056] The control system may also be configured to control the system light. In particular, the control system may be configured to control one or more of: polarization of the system light, beam shape of the system light, and radiant flux of the system light. In particular, the control system may be configured to control the beam shape of the system light. In additional embodiments, the control system may be configured to control the color of the device light.

[0057] The term "control" and similar terms refer in particular at least to determining the behavior or supervising the operation of an element. Therefore, "control" and similar terms herein, for example, may refer to applying behavior to an element (determining the behavior or supervising the operation of an element), such as measuring, displaying, actuating, opening, moving, changing temperature, etc. In addition, the term "control" and similar terms may also include monitoring. Therefore, the term "control" and similar terms may include applying behavior to an element and applying behavior to an element and monitoring the element. The control of an element may be accomplished by a control system, which may also be represented as a "controller". Therefore, the control system and the element may be functionally coupled at least temporarily or permanently. The element may include a control system. In an embodiment, the control system and the element may not be physically coupled. Control may be accomplished by wired and / or wireless control. The term "control system" may also refer to a plurality of different control systems, which are particularly functionally coupled, for example, one of which may be a master control system, and one or more other control systems may be slave control systems. The control system may include a user interface or may be functionally coupled to a user interface.

[0058] The control system may also be configured to receive and execute instructions from a remote control. In an embodiment, the control system may be controlled via an App on a device, such as a portable device such as a smartphone or I-phone, a tablet, etc. Thus, the device is not necessarily coupled to the lighting system, but may be (temporarily) functionally coupled to the lighting system.

[0059] Thus, in an embodiment, the control system may (also) be configured to be controlled by an App on a remote device. In such an embodiment, the control system of the lighting system may be a slave control system or controlled in slave mode. For example, the lighting system may be identified with a code, in particular a unique code for the respective lighting system. The control system of the lighting system may be configured to be controlled by an external control system, which accesses the lighting system based on knowledge of the (unique) code (entered via a user interface with an optical sensor (e.g. a QR code reader)). The lighting system may also include means for communicating with other systems or devices, for example based on Bluetooth, Thread, WIFI, LiFi, ZigBee, BLE or WiMAX or other wireless technologies.

[0060] The system, device or equipment may perform actions in a "mode" or "operating mode" or "mode of operation" or "operational mode". The term "operating mode" may also be expressed as a "control mode". Similarly, in the method, actions or stages or steps may be performed in a "mode" or "operating mode" or "mode of operation" or "operational mode". This does not exclude that the system, device or equipment may also be adapted to provide another control mode or multiple other control modes. Similarly, this does not exclude that one or more other modes may be performed before and / or after the execution of the mode.

[0061] However, in an embodiment, a control system is available, which is adapted to provide at least a control mode. If other modes are available, the selection of these modes can in particular be performed via a user interface, although other options are also possible, such as executing a mode according to a sensor signal or a (time) scheme. An operating mode in an embodiment may also refer to a system, device or apparatus that can only operate in a single operating mode (i.e. "on", without further adjustability).

[0062] Therefore, in an embodiment, the control system may be controlled according to one or more of an input signal of a user interface, a sensor signal (of a sensor) and a timer. The term "timer" may refer to a clock and / or a predetermined time scheme.

[0063] In an embodiment, the collimator may include a hollow first reflector. In particular, in an embodiment, the hollow first reflector may provide specular reflection. In other embodiments, the collimator may include a TIR reflector.

[0064] As mentioned above, the collimator may comprise a hollow first reflector. In this case, the collimator may be open at the second end. However, in an embodiment, the collimator may also comprise a light-transmitting material (the second end may then be a (planar) face of the light-transmitting material). The light-transmitting material is particularly transparent.

[0065] In an embodiment, the hollow first reflector may include a metal coating, in particular a coating with high specular reflectivity. For example, the metal coating may be an aluminum coating or a silver coating. In a specific embodiment, such a metal coating may be covered with a transparent material to prevent metal aging. Alternatively, in an embodiment, the hollow first reflector may include an interference coating with high specular reflectivity. In particular, the interference coating may consist of a stack of transparent layers with alternating refractive indices. In this way, a reflective surface may be obtained.

[0066] As described above, in other embodiments, the collimator may include a light-transmitting material. In particular, in such an embodiment, the collimator may be based on a total internal reflection (TIR) ​​reflector. Such a TIR reflector may be particularly configured so that the light originating from the light source cannot leave the (multiple) side walls of the transparent body due to total internal reflection. In addition, such a TIR reflector may include a light-reflecting coating (on the side walls), in particular a specular light-reflecting coating, such as a metal coating in an embodiment. In addition, as known in the art, the TIR reflector may include (at the first end) (n optical) cavities. Additionally or alternatively, in an embodiment in which the collimator may include a TIR reflector, the collimator may also include a third reflector. The third reflector may be particularly configured in the (optical) cavity. More specifically, in an embodiment, the third reflector may be attached to the first end of the collimator.

[0067] As described above, the light generating system may include one or more light generating devices. In an embodiment, the one or more light generating devices may include one or more lasers, in particular diode lasers. Additionally or alternatively, in an embodiment, the one or more light generating devices may include one or more superluminescent diodes. Furthermore, in an embodiment, the one or more light generating devices may include one or more lasers and one or more superluminescent diodes.

[0068] One or more light generating devices may be configured to generate device light. In particular, in an embodiment, one or more light generating devices may be configured to generate polarized radiation. To this end, one or more light generating devices may include a light source, such as a laser light source, which is configured to generate light source light. Therefore, in an embodiment, one or more light generating devices may include one or more lasers. In other embodiments, one or more light generating devices may include one or more super luminescent diodes. In yet other embodiments, one or more light generating devices may include one or more lasers and one or more super luminescent diodes.

[0069] The term "light source" may also refer to a plurality of (essentially identical (or different)) light sources, such as 2-200 (solid-state) LED light sources. Thus, the term LED may also refer to a plurality of LEDs.

[0070] The light source has a light escape surface. For a conventional light source, such as a light bulb or a fluorescent lamp, the light escape surface may be the outer surface of a glass or quartz housing. For an LED, the light escape surface may be the LED die, or when a resin is coated on the LED die, the light escape surface may be the outer surface of the resin. In principle, the light escape surface may also be the terminal end of an optical fiber. The term "escape surface" refers in particular to the part of the light source from which light actually leaves or escapes. The light source is configured to provide a light beam. Therefore, the light beam escapes from the light exit surface of the light source.

[0071] The term "light source" may refer to a semiconductor light emitting device, such as a light emitting diode (LED), a resonant cavity light emitting diode (RCLED), a vertical cavity laser diode (VCSEL), an edge emitting laser, etc. The term "light source" may also refer to an organic light emitting diode, such as a passive matrix (PMOLED) or an active matrix (AMOLED). In a specific embodiment, the light source includes a solid-state light source (such as an LED or a laser diode). In one embodiment, the light source includes an LED (light emitting diode). The term LED may also refer to a plurality of LEDs. In addition, the term "light source" may also refer to a so-called chip on board (COB) light source in an embodiment. The term "COB" refers in particular to an LED chip in the form of a semiconductor chip, which is neither packaged nor connected, but is directly mounted on a substrate (such as a PCB). Therefore, multiple semiconductor light sources may be configured on the same substrate. In an embodiment, COB is a plurality of LED chips configured together as a single lighting module.

[0072] In an embodiment, the light source may include one or more micro-optical elements (micro-lens array) located downstream of a single solid-state light source (e.g., LED) or downstream of multiple solid-state light sources (i.e., a light source shared by multiple LEDs). In an embodiment, the light source may include an LED with on-chip optics. In an embodiment, the light source includes a pixelated single LED (with or without optics) (on-chip beam steering is provided in an embodiment).

[0073] The term "laser light source" refers in particular to a laser. Such a laser may in particular be configured to generate laser light source light having one or more wavelengths in the ultraviolet, visible or infrared, in particular having a wavelength selected from the spectral wavelength range of 200-2000 nm, for example 300-1500 nm. The term "laser" refers in particular to a device that emits light by a light amplification process based on stimulated emission of electromagnetic radiation.

[0074] In particular, in embodiments, the term "laser" may refer to a solid-state laser. In specific embodiments, the term "laser" or "laser light source" or similar terms refer to a laser diode (or diode laser).

[0075] Thus, in an embodiment, the light source comprises a laser light source. In an embodiment, the term "laser" or "solid-state laser" may refer to one or more of the following: cerium-doped lithium strontium (or calcium) aluminum fluoride (Ce:LiSAF, Ce:LiCAF), chromium-doped chrysoberyl (alexandrite) laser, chromium ZnSe (Cr:ZnSe) laser, divalent samarium-doped calcium fluoride (Sm:CaF2) laser, Er:YAG laser, erbium-doped and erbium-ytterbium co-doped glass laser, F -Center laser, holmium YAG (Ho:YAG) laser, Nd:YAG laser, NdCrYAG laser, neodymium-doped yttrium calcium oxyborate Nd:YCa4O(BO3)3 or Nd:YCOB, neodymium-doped yttrium vanadate (Nd:YVO4) laser, neodymium glass (Nd:glass) laser, neodymium YLF (Nd:YLF) solid-state laser, promethium 147-doped phosphate glass (147Pm 3+ : glass) solid-state laser, ruby ​​laser (Al2O3:Cr 3+ ), Thulium YAG (Tm:YAG) laser, Titanium Sapphire (Ti: Sapphire; Al2O3:Ti 3+ ) lasers, trivalent uranium-doped calcium fluoride (U:CaF2) solid-state lasers, ytterbium-doped glass lasers (rods, plates / chips, optical fibers), ytterbium YAG (Yb:YAG) lasers, Yb2O3 (glass or ceramic) lasers, etc.

[0076] In an embodiment, the term "laser" or "solid-state laser" may refer to one or more semiconductor laser diodes, such as GaN, InGaN, AlGaInP, AlGaAs, InGaAsP, lead salt, vertical cavity surface emitting laser (VCSEL), quantum cascade laser, hybrid silicon laser, etc.

[0077] Lasers can be combined with upconverters to achieve shorter (laser) wavelengths. For example, upconversion can be achieved using certain (trivalent) rare earth ions, or using nonlinear crystals. Alternatively, lasers can be combined with downconverters (e.g. dye lasers) to achieve longer (laser) wavelengths.

[0078] As will be seen below, the term "laser light source" may also refer to a plurality of (different or identical) laser light sources. In a specific embodiment, the term "laser light source" may refer to a plurality of N (identical) laser light sources. In an embodiment, N=2 or more. In a specific embodiment, N may be at least 5, for example in particular at least 8. In this way, a higher brightness may be obtained. In an embodiment, the laser light sources may be arranged in a laser group (see also below). In an embodiment, the laser group may include a heat sink and / or an optical device (e.g., a lens) to collimate the laser.

[0079] The laser light source is configured to generate laser light source light (or "laser light"). The light source light may consist essentially of laser light source light. The light source light may also include laser light source lights of two or more (different or the same) laser light sources. For example, laser light source lights of two or more (different or the same) laser light sources may be coupled into a light guide to provide a single light beam including laser light source lights of two or more (different or the same) laser light sources. In certain embodiments, the light source light is therefore particularly collimated light source light. In further embodiments, the light source light is particularly (collimated) laser light source light. The phrases "different light sources" or "multiple different light sources" and similar phrases may refer in embodiments to multiple solid-state light sources selected from at least two different boxes. Similarly, the phrases "same light source" or "multiple identical light sources" and similar phrases may refer in embodiments to multiple solid-state light sources selected from the same box.

[0080] The light source is specifically configured to generate a source light having an optical axis (O) (beam shape) and a spectral power distribution. The source light may in embodiments comprise one or more bands having a known bandwidth of the laser. In a particular embodiment, the band(s) may be(s) relatively sharp lines, e.g. having a full width at half maximum (FWHM) in the range of less than 20 nm at RT, e.g. 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), which may comprise one or more (narrow) bands.

[0081] The beam (of the light source light) may be a focused or collimated (laser) light source beam. The term "focusing" may particularly refer to converging into a small spot. The small spot may be located at the discrete converter region, or (slightly) upstream thereof or (slightly) downstream thereof. In particular, the focusing and / or collimation may be such that the cross-sectional shape (perpendicular to the optical axis) of the beam at the discrete converter region (on the side) is substantially not larger than the cross-sectional shape (perpendicular to the optical axis) of the discrete converter region (where the light source light irradiates the discrete converter region). The focusing may be performed with one or more optical devices, such as (focusing) lenses. In particular, two lenses may be used to focus the laser light source light. The collimation may be performed with one or more (other) optical devices, such as collimating elements, such as lenses and / or parabolic mirrors. In an embodiment, the (laser) light source beam may be relatively highly collimated, such as ≤2° (FWHM) in an embodiment, more particularly ≤1° (FWHM), most particularly ≤0.5° (FWHM). Therefore, ≤ 2° (FWHM) can be considered as (highly) collimated source light. Optics can be used to provide (high) collimation (see above).

[0082] In an embodiment, the light generating system may include a first light generating device and a second light generating device. The first light generating device may be configured to generate a first device light having a first polarization. Similarly, the second light generating device may be configured to generate a second device light having a second polarization. In particular, the second polarization may be different from the first polarization. In addition, the control system may be configured to control the first light generating device and the second light generating device. Therefore, in a specific embodiment, the light generating system may include (i) a first light generating device, configured to generate a first device light having a first polarization, and (ii) a second light generating device, configured to generate a second device light having a second polarization different from the first polarization; wherein the control system may be configured to control the first light generating device and the second light generating device.

[0083] The first light generating device and the second light generating device may be configured to generate the first and / or second device light having the first and / or second polarization. In an embodiment, the first and / or second light generating device may include an optical device for polarizing the corresponding light source light or changing the polarization of the corresponding light source light to provide polarized first and / or second device light. In particular, the polarized first and / or second device light may substantially have s-polarization and / or p-polarization. In particular, the first and second polarizations may be essentially different. For example, in an embodiment, the first device light may have s-polarization and the second device light may have p-polarization. Alternatively, in an embodiment, the first device light may have p-polarization and the second device light may have s-polarization.

[0084] However, in other embodiments, the first device light and / or the second device light may be unpolarized light.

[0085] Additionally or alternatively, in other embodiments, the light generating system may include more than two types of light generating devices. In this case, one or more first light generating devices may be configured to generate p-polarized device light, and one or more second light generating devices may be configured to generate s-polarized device light (or vice versa).

[0086] It can be seen from this that the term "first light generating device" may also refer to one or more first light generating devices; similarly, the term "second light generating device" may also refer to one or more second light generating devices.

[0087] In an embodiment, the control system may be configured to control the one or more first light generating devices and the one or more second light generating devices. In particular, in an embodiment, the control system may be configured to control the polarization of the one or more first light generating devices and the one or more second light generating devices.

[0088] In an embodiment, the light generating system may include a laser group. In particular, the laser may carry a plurality of light generating devices. In an embodiment, the laser group may carry a first light generating device and a second light generating device. In this case, the first light generating device may include a first laser, and the second light generating device may include a second laser (see above).

[0089] Additionally or alternatively, in an embodiment, the light generating system may include a plurality of first and / or second light generating devices, which include a plurality of first and / or second lasers. The plurality of first and / or second light generating devices may be configured in one or more laser groups, such as one laser group, such as two laser groups. For example, in an embodiment, the light generating system may include a laser group having one or more first light generating devices and a separate laser group having one or more second light generating devices. In other embodiments, the light generating system may include one or more laser groups, each laser group having one or more first light generating devices and one or more second light generating devices.

[0090] The laser group can in particular be arranged outside the collimator. In other embodiments, the laser group can also be arranged (at least partially) inside the collimator.

[0091] Furthermore, in an embodiment, the light generating system may include a polarization control system configured to control the polarization of the device light. The device light may in particular be in a polarization state of light. The polarization control system may in particular be configured to change the polarization state of the device light. Additionally or alternatively, the polarization control system may be configured to control the polarization state of the device light. For example, in an embodiment, the first and second light generating devices may be configured to generate unpolarized light. The polarization control system may be configured to change the unpolarized device light into p-polarized or s-polarized device light.

[0092] In an embodiment, the polarization control system may specifically be configured (optically coupled) between the one or more light generating devices and the polarization beam splitter.

[0093] Furthermore, in an embodiment, the polarization control system may be comprised by the control system, such that the control system may be configured to control the polarization control system.

[0094] Additionally or alternatively, in an embodiment, the polarization control system may include a half-wave plate (or "half-wave retarder") configured to offset the polarization (direction) of the device light. The half-wave plate may particularly have a controllable fast axis rotation, which may be controlled by the polarization control system. Half-wave plates are known in the art. In particular, the half-wave plate may include a birefringent material. The half-wave plate may particularly include a material selected from the group of (crystalline) quartz, mica, calcite and plastic.

[0095] In an embodiment, the optical device may include (i) a polarization beam splitter configured in a collimator, and (ii) a retarder device. Additionally or alternatively, in an embodiment, the optical device may include optical devices such as lenses, isolators, attenuators, polarization rotators, etc. However, the optical device may particularly include a polarization beam splitter (particularly, configured in a collimator) and a retarder device. The polarization beam splitter may be configured to be in a light receiving relationship with one or more light generating devices. In particular, the polarization beam splitter may be configured to (i) guide at least a portion of the received device light in the direction of the first light emitter or the second light emitter when the device light has a first polarization, and (ii) guide at least a portion of the received device light to the retarder device when the device light has a second polarization. More particularly, the second polarization may be different from the first polarization. In this case, the other of the first light emitter and the second light emitter may be configured to be in a light receiving relationship with one or more light generating devices via the retarder device and the polarization beam splitter. In particular, in an embodiment, the other of the first light emitter and the second light emitter may be configured to receive at least a portion of the device light having a second polarization. Thus, in certain embodiments, the optical device may include (i) a polarizing beam splitter configured in a collimator, and (ii) a retarder device, wherein: the polarizing beam splitter may be configured to be in a light receiving relationship with one or more light generating devices; wherein the polarizing beam splitter may be configured to (i) direct at least a portion of the received device light in the direction of a first light emitter or a second light emitter when the device light has a first polarization, and (ii) direct at least a portion of the received device light to the retarder device when the device light has a second polarization; wherein the other of the first light emitter and the second light emitter may be configured to be in a light receiving relationship with the one or more light generating devices via the retarder device and the polarizing beam splitter. The retarder device may be configured in the collimator or external to it.

[0096] In particular, in an embodiment, the polarization beam splitter can be configured to be in a light receiving relationship with one or more light generating devices, that is, can be optically coupled. More particularly, the polarization beam splitter can be configured to guide at least a portion of the received device light having a first polarization in the direction of a first or second light emitter. Therefore, in an embodiment, the device light can be guided to the corresponding light emitter according to the polarization of the device light. In a specific embodiment, the polarization beam splitter included by the optical device can be configured to guide at least a portion of the device light having a first polarization (especially s-polarized device light) to the first light emitter.

[0097] In an embodiment, the polarizing beam splitter may include a reflective polarizer.

[0098] Additionally or alternatively, in certain embodiments, the polarization beam splitter may be configured to direct at least a portion of the received device light having a second polarization to the retarder device. Thus, in such embodiments, the second light emitter may be particularly configured to be in a light receiving relationship with one or more light generating devices via the retarder device and the polarization beam splitter. Furthermore, in such embodiments, the second light emitter may be configured to receive at least a portion of the device light having a second polarization. In particular, the polarization beam splitter may be configured to transmit device light having a second polarization, in particular p-polarized device light. Thus, the device light having a second polarization may pass through the polarization beam splitter toward the retarder device. In embodiments, the retarder device may redirect the incident device light back to the polarization beam splitter. Conversely, in such instances, the polarization beam splitter may redirect the incident device light to the second light emitter.

[0099] Thus, the second polarization may be substantially different from the first polarization. In particular, in certain embodiments, the second polarization may be a p-polarization and the first polarization may be an s-polarization.

[0100] In further embodiments, the retarder device may comprise a retarder. The retarder may in particular comprise a quarter wave plate. Furthermore, in embodiments, the retarder device may comprise a second reflector. The retarder device may in particular be configured outside the collimator. The retarder device may also be configured (at least partially) inside the collimator. Thus, in a particular embodiment, the optical device may comprise a retarder device, wherein the retarder device may comprise (i) a retarder, wherein the retarder comprises a quarter wave plate, and (ii) a second reflector; wherein the retarder device may be configured outside the collimator.

[0101] As is known in the art, a wave plate or retarder is an optical device that changes the polarization state of a light wave as it passes through it. A half-wave plate can change the polarization direction of linearly polarized light (particularly from s-polarization to p-polarization or from p-polarization to s-polarization), while a quarter-wave plate can convert linearly polarized light into circularly polarized light (and vice versa).

[0102] In an embodiment, the retarder may include a quarter wave plate. The quarter wave plate may be configured to cause a phase shift in the device light, in particular to cause a λ / 4 phase shift in the device light. In other embodiments, the retarder may include a half wave plate (λ / 2), a full wave (or "sensitive tone") plate (λ), a multi-order wave plate, or a zero-order wave plate.

[0103] In particular, in an embodiment, the retarder may comprise a birefringent material, such as one or more materials selected from the group comprising (crystalline) quartz, mica, calcite, plastic or a 3D printed material.

[0104] Furthermore, the retarder device may comprise a second reflector. The second reflector may provide specular reflection. Furthermore, in an embodiment, the second reflector may comprise a metal coating, in particular a coating with a high specular reflectivity. For example, the metal coating may be an aluminum coating or a silver coating. In a particular embodiment, such a metal coating may be covered with a transparent material to prevent metal aging. Alternatively, in an embodiment, the second reflector may comprise an interference coating with a high specular reflectivity. In particular, the interference coating may consist of a stack of transparent layers with alternating refractive indices. In this way, a reflective surface may be obtained.

[0105] Furthermore, in certain embodiments, the retarder device may be arranged outside the collimator. In other embodiments, the retarder device may also be arranged (at least partially) inside the collimator.

[0106] In embodiments where the collimator comprises a hollow reflector, the collimator may comprise a collimator wall. In such embodiments, for example, the retarder device may be configured to be surrounded by the collimator wall, in particular, the second reflector may be comprised by the collimator wall.

[0107] In an embodiment where the collimator comprises a TIR reflector, the collimator may comprise a block. In such an embodiment, the retarder device may be arranged in the (optical) cavity (at the first side) of the TIR reflector. Additionally or alternatively, the second reflector may be arranged in the (optical) cavity of the TIR reflector. In a particular embodiment, the second reflector may enclose the (optical) cavity. Thus, in such an embodiment, the second reflector may form the first end of the TIR reflector collimator.

[0108] In other embodiments, one or more light generating devices may be configured outside the collimator. The collimator may include a collimator wall. In particular, the collimator wall may taper in the direction from the second end to the first end (see also above). Furthermore, in an embodiment, the collimator wall may include a (small) first opening configured between the one or more light generating devices and the polarization beam splitter. Furthermore, in an embodiment, the collimator wall may further include a (small) second opening configured between the polarization beam splitter and the delay device. Thus, in a particular embodiment, one or more light generating devices may be configured outside the collimator; wherein the collimator may include a collimator wall, wherein the collimator wall may taper in the direction from the second end to the first end; wherein the collimator wall may include a first opening configured between the one or more light generating devices and the polarization beam splitter; and wherein the collimator wall may include a second opening configured between the polarization beam splitter and the delay device.

[0109] The one or more light generating devices may be arranged outside the collimator. However, in other embodiments, the one or more light generating devices may be arranged (at least partially) inside the collimator. However, in particular, the one or more light generating devices may be arranged outside the collimator.

[0110] Therefore, the collimator may comprise a collimator wall, in particular the collimator wall may be a hollow reflector. The collimator wall may in particular be conical. For example, in an embodiment, the collimator wall may be conical. More particularly, in an embodiment, the collimator wall may taper in the direction from the second end to the first end (see also above). In an embodiment, the collimator wall may comprise a first opening. The first opening may in particular be a small opening, i.e. the first opening may have a cross-sectional dimension (or diameter) of at most 10 mm, for example at most 25 mm, for example at most 50 mm. In other embodiments, the first opening may be a larger opening. In an embodiment, the collimator may comprise a compound parabolic mirror or a compound parabolic reflector.

[0111] Thus, the collimator wall may comprise a first opening. In an embodiment, the first opening may be configured between the one or more light generating devices and the polarizing beam splitter. Thus, the first opening may be configured such that the polarizing beam splitter may receive device light from the one or more light generating devices (outside the collimator).

[0112] In an embodiment, the collimator wall may comprise a second opening. The second opening may in particular be a small opening, i.e. the second opening may have a cross-sectional dimension (or diameter) of at most 20 mm, such as at most 10 mm, such as selected from the range of 0.1-5 mm. In other embodiments, the second opening may be a larger opening.

[0113] Thus, the collimator wall may comprise a second opening. In an embodiment, the second opening may be configured between the polarization beam splitter and the retarder device. Thus, the second opening may be configured such that the retarder device (external to the collimator) may receive (and reflect) device light from (and to) the polarization beam splitter.

[0114] In an embodiment, the first opening and the second opening may be configured to be substantially opposite to each other in the collimator wall. However, in other embodiments, the first opening and the second opening may be configured not to be opposite to each other. In this case, the device beam may be directed from the first opening to the second opening by using, for example, a mirror or a reflector.

[0115] In an embodiment, the first opening and the second opening may be a slit or a circular opening, or any other shape. In an embodiment, the first opening and the second opening may have the same shape. However, in other embodiments, the first opening and the second opening may have different shapes. Likewise, in an embodiment, the first opening and the second opening may have the same size. However, in other embodiments, the first opening and the second opening may have different sizes.

[0116] Additionally or alternatively, in an embodiment, the collimator may include a TIR reflector. In such an embodiment, the one or more light generating devices may be configured outside the TIR reflector. In addition, the TIR reflector may taper in a direction from the second end to the first end. In addition, the TIR reflector may include a first opening that is specifically configured between the one or more light generating devices and the polarization beam splitter. In addition, the TIR reflector may include a second opening that is specifically configured between the polarization beam splitter and the retarder device.

[0117] In an embodiment, different light emitters may be illuminated by device light having different polarizations. Thus, the optical paths to the different light emitters may depend at least on the polarization of the device light. In such an embodiment, the device light illuminating the first light emitter and the device light illuminating the second light emitter may have the same spectral power distribution (although not necessarily), but may in particular have different polarizations (e.g., s-polarization or p-polarization). For example, a reflective polarizer may be applied.

[0118] In an embodiment, different light emitters may be illuminated by the device light via at least two light beams propagating via different optical paths. A reflective surface may direct the device light from one direction to one of the light emitters, while (another) reflective surface may direct the device light from another direction to another of the light emitters. In such an embodiment, the device light illuminating the first light emitter and the device light illuminating the second light emitter may have the same spectral power distribution, but may also have different spectral power distributions. The polarization may be the same or different. For example, one or more reflectors may be applied.

[0119] In an embodiment, different light emitters may be illuminated by device lights having different spectral power distributions. Thus, the optical paths to the different light emitters depend at least on the spectral power distribution of the device light. In such an embodiment, the device light illuminating the first light emitter and the device light illuminating the second light emitter will have different spectral power distributions. For example, a dichroic mirror may be applied.

[0120] As described above, the light generating system may be configured to provide system light. In an operating mode, the light generating system may provide a first beam of system light. In another operating mode, the light generating system may provide a second beam of system light. In an embodiment, the first light emitter and the collimator may be configured so that the first beam of system light may have a first beam angle β1. The first beam of system light may particularly include a first luminescent material light. In addition, in an embodiment, the first beam angle β1 may be defined by a maximum half-width at half-maximum of 2°. In addition, the second light emitter and the collimator may be configured so that the second beam of system light may have a second beam angle β2. The second beam of system light may particularly include a second luminescent material light. In addition, in an embodiment, the second beam angle β2 may be defined by a minimum half-width at half-maximum of 5°. In particular, the system light may (substantially only) escape from the collimator via the second side. Therefore, in an embodiment, the first beam angle β1 of the first beam of system light may be defined by a half-width at half-maximum, in particular by a maximum half-width at half-maximum of 3°, for example a maximum of 2°, for example a maximum of 1°, in particular a maximum of 0.5°. In an embodiment, the first light emitter and the collimator may be configured to provide a first beam of system light as described herein. Specifically, the first light emitter and the collimator may convert and redirect the device light to provide the first beam of system light. Such a maximum value of the half-width at half-maximum of the first beam angle β1 of the first beam of system light may be particularly suitable for stage lighting purposes.

[0121] Furthermore, in an embodiment, a second beam angle β2 of the second light beam of the system light may be defined by a half-width at half-maximum, in particular by a half-width at half-maximum of at least 5°, for example preferably at least 10°, for example preferably at least 15°, particularly preferably at least 20°. In an embodiment, the second light emitter and the collimator may be configured to provide a second light beam of the system light as described herein. In particular, the second light emitter and the collimator may convert and redirect the device light to provide the second light beam of the system light. Therefore, in particular β1<β2. For example, in an embodiment β1 / β2≤0.5, for example, in an embodiment β1 / β2≤0.1.

[0122] Thus, the first light emitter, the second light emitter and the collimator may be configured to provide dynamic beam shaping. In particular, the control system may control the light generating system to provide dynamic beam shaping. In an embodiment, the illumination of the first light emitter may generate a first beam of system light, in particular a narrow beam of system light. In particular, the illumination of the first light emitter may provide space for reflection of the luminescent material light on the walls of the collimator. Such reflection may result in collimation of the light, i.e., may result in a narrow first beam of system light. In other embodiments, the illumination of the second light emitter may generate a second beam of system light, in particular a wide second beam of system light. In particular, the illumination of the second light emitter may provide less space for reflection of the luminescent material light on the walls of the collimator. Thus, the illumination of the second light emitter may result in less collimation of the light, i.e., may result in a wide second beam of system light.

[0123] Thus, dynamic beam shaping can be provided.

[0124] Differently positioned first and second light emitters may result in different spatial light distributions of the system light.In an embodiment, in the first operating mode and the second operating mode, the relative contributions of the first and second light emitters may be changed.

[0125] The control system may be configured to switch between a first operating mode and a second operating mode. The system may be configured to provide a first beam of system light in the first operating mode. In particular, the first beam of system light may have a first spatial light distribution. Thus, in the first operating mode, the relative contribution of the first luminous body may be higher. The system may also be configured to provide a second beam of system light in the second operating mode. In particular, the second beam of system light may have a second spatial light distribution. Thus, in the second operating mode, the relative contribution of the second luminous body may be higher.

[0126] In embodiments, the control system may be configured to switch between a working light mode and an ambient light mode. For example, in embodiments, the working light mode may be provided by a first operating mode. Thus, a narrower first beam of system light may be useful for the working light mode. Additionally, in embodiments, the ambient light mode may be provided by a second operating mode. Thus, a wider second beam of system light may be useful for the ambient light mode.

[0127] In an embodiment, one or more light generating devices, the first light emitter and the second light emitter may be selected and configured such that the spatial and / or spectral characteristics of the system light may depend on the polarization of the device light. In this case, in particular the spectral characteristics selected from the color point and the correlated color temperature of the system light may depend on the polarization of the device light.

[0128] The system light may have spatial characteristics, such as beam angle and beam shape. In addition, the system light may also have spectral characteristics, such as intensity, color point and correlated color temperature (see also below). In embodiments, the spatial characteristics of the system light may depend on the polarization of the device light. In further embodiments, the spectral characteristics of the system light may depend on the polarization of the device light.

[0129] In an operating mode, in an embodiment, the system may be configured to generate white light. In this case, in an embodiment, blue (laser) light may be combined with (yellow) phosphor converted light to produce white light. Thus, the light generating device may be configured to generate blue (laser) device light, while at the same time the first and / or second light emitter may be configured to convert a portion of this blue (laser) device light into (yellow) luminescent material light. Thus, in particular, the system light comprises (yellow) luminescent material light and unconverted (blue) device light.

[0130] In certain embodiments, the luminescent material may be selected such that the system light may be warm white light or cool white light. In particular, in certain embodiments, the first luminescent material may be selected such that the first operating mode may produce a narrow first beam of cool white system light. Such a system light beam is particularly useful for creating a working light mode. Furthermore, in such a certain embodiment, the second luminescent material may be selected such that the second operating mode may produce a wide second beam of warm white system light. Such a system light beam is particularly useful for creating an ambient light mode.

[0131] In other embodiments, the system can be configured to produce colored light in an operating mode. In further embodiments, the system can be configured to produce white light in one or more operating modes and to produce colored light in one or more other operating modes. Thus, multiple different operating modes with multiple light beams of different shapes and colors can be achieved.

[0132] The term "white light" and similar terms herein are known to those skilled in the art. It particularly relates to white light having a correlated color temperature (CCT) between about 1800K and 20000K, such as between 2000 and 20000K, especially 2700-20000K, for general lighting, especially in the range of about 2000-7000K, such as in the range of 2700K and 6500K. In an embodiment, for example for backlighting purposes or for other purposes, the correlated color temperature (CCT) may especially be in the range of about 7000K and 20000K. Furthermore, in an embodiment, the correlated color temperature (CCT) is especially within about 15SDCM (standard deviation of color matching) from the BBL (black body locus), especially within about 10SDCM from the BBL, even more especially within about 5SDCM from the BBL.

[0133] In a particular embodiment, the correlated color temperature (CCT) may be selected from the range of 6000-12000 K, such as from the range of 7000-12000 K, such as at least 8000 K. Furthermore, in an embodiment, the correlated color temperature (CCT) may be selected from the range of 6000-12000 K, such as from the range of 7000-12000 K, in combination with a CRI of at least 70.

[0134] In an embodiment, the first luminescent body may include a first luminescent material. Similarly, the second luminescent body may include a second luminescent material. In particular, in an embodiment, the first luminescent material and the second luminescent material may be different. In addition, the first luminescent material and the second luminescent material may include A3B5O 12 :Ce type luminescent material, wherein A in the embodiment may include one or more of Y, La, Gd, Tb and Lu, and wherein B in the embodiment may include one or more of Al, Ga, In and Sc. In an embodiment, A may specifically (at least) include one or more of Y, Gd, Tb and Lu. Additionally or alternatively, in an embodiment, B may specifically include at least one or more of Al and Ga. Therefore, in a specific embodiment, the first luminophore may include a first luminescent material, and the second luminophore may include a second luminescent material, wherein the first luminescent material and the second luminescent material may be different; wherein at least one of the first luminescent material and the second luminescent material may include A3B5O 12 :Ce type luminescent material, wherein A in the embodiment includes one or more of Y, La, Gd, Tb and Lu, and wherein B in the embodiment includes one or more of Al, Ga, In and Sc.

[0135] In an embodiment, both the first and second light emitters may include A3B5O 12 In such an embodiment, the first and second luminophores may comprise different compositions of the elements A and B.

[0136] In other embodiments, the first and / or second luminescent body may include a combination of different luminescent materials, in particular including A3B5O 12 : Ce type luminescent material. In such an embodiment, the first and second luminescent bodies may be substantially different, ie, the first and second luminescent bodies may include different luminescent material combinations.

[0137] As described above, the light generating system comprises in particular first and second luminophores, which comprise first and second luminescent materials, which are configured to convert at least a portion of the light source light into (first and / or second) luminescent material light. Thus, in particular, the first and / or second luminescent material is or comprises a converter element.

[0138] The term "luminescent material" in this context relates in particular to inorganic luminescent materials, sometimes also referred to as phosphors. These terms are known to the person skilled in the art.

[0139] The term "luminescent material" also refers to a material that is capable of converting a first radiation, in particular (one or more UV radiation and) blue radiation, into a second radiation. Typically, the first radiation and the second radiation have different spectral power distributions. Therefore, in addition to the term "luminescent material", the term "luminescent converter" or "converter" may also be used. Typically, the second radiation has a spectral power distribution at a larger wavelength than the first radiation, which is the case of so-called down-conversion. However, in specific embodiments, the second radiation has a spectral power distribution of intensity at a smaller wavelength than the first radiation, which is the case of so-called up-conversion. In embodiments, a "luminescent material" may particularly refer to a material that is capable of converting radiation into, for example, visible light and / or infrared light. For example, in embodiments, the luminescent material may be capable of converting one or more UV radiation and blue radiation into visible light. In specific embodiments, the luminescent material may also convert radiation into infrared radiation (IR). Thus, when excited with radiation, the luminescent material emits radiation. In general, the luminescent material will be a down-converter, i.e. radiation of a smaller wavelength is converted into radiation with a larger wavelength (λ ex <λ em ), although in certain embodiments the luminescent material may comprise a down-converter luminescent material, ie radiation of a larger wavelength is converted into radiation having a smaller wavelength (λ ex >λ em ). In an embodiment, the term "luminescence" may refer to phosphorescence. In an embodiment, the term "luminescence" may also refer to fluorescence. In addition to the term "luminescence", the term "emission" may also be used. Therefore, the terms "first radiation" and "second radiation" may refer to excitation radiation and emission (radiation), respectively. Similarly, the term "luminescent material" may refer to phosphorescence and / or fluorescence in an embodiment. The term "luminescent material" may also refer to a variety of different luminescent materials. The term "luminescent material" herein may also refer to a material including a luminescent material, such as a light-transmitting body including a luminescent material.

[0140] In particular, the luminescent material is configured to convert at least a portion of the light source light into luminescent material light, wherein the luminescent material may include A3B5O 12: Ce type (garnet) luminescent material, wherein A comprises one or more of Y, La, Gd, Tb and Lu, and wherein B comprises one or more of Al, Ga, In and Sc. Thus, the luminescent material light may be, for example, green or yellow (or even orange in a particular embodiment (depending on the composition of the garnet and the cerium concentration)). However, other embodiments are also possible, see below. In an embodiment, 0.05-10% of the A elements comprise Ce, even more particularly 0.05-5%, for example 0.1-5%. In particular, in an embodiment, 0.1-3% of the A elements comprise Ce, for example up to 2%, such as selected from the range of 0.1-1.5%, for example at least higher than 0.5%.

[0141] In particular, the luminescent material includes a conversion material or is itself a conversion material. The luminescent material converts light from a light source (e.g., light source light) into secondary light (here, luminescent material light). The luminescent material may include an organic group that converts light, a molecule that converts light, an inorganic group that converts light, etc. Such groups (or molecules) may be represented as converter elements. The cerium (Ce) garnet-type material shown above is included as a converter element. Cerium-containing garnets are well known in the art.

[0142] Therefore, in a specific embodiment, the luminescent material includes A3B5O 12 : Ce type luminescent material, wherein A in the embodiment comprises one or more of Y, La, Gd, Tb and Lu, in particular (at least) one or more of Y, Gd, Tb and Lu, and B in the embodiment comprises one or more of Al, Ga, In and Sc. In particular, A may comprise one or more of Y, Gd and Lu, for example in particular one or more of Y and Lu. In particular, B may comprise one or more of Al and Ga, more in particular at least Al, for example substantially all of Al. Therefore, a particularly suitable luminescent material is a cerium-containing garnet material. Embodiments of garnets in particular comprise A3B5O 12Garnet, wherein A comprises at least yttrium or lutetium, and wherein B comprises at least aluminum. Such garnets may be doped with cerium (Ce), praseodymium (Pr) or a combination of cerium and praseodymium; however, in particular Ce is doped. In particular, B comprises aluminum (Al), however, B may also partially comprise gallium (Ga) and / or scandium (Sc) and / or indium (In), in particular up to about 20% Al, more in particular up to about 10% Al (i.e., the B ions are essentially composed of 90% or more mol % Al and 10% or less mol % of one or more of Ga, Sc and In); B may in particular contain up to about 10% gallium. In another variant, B and O may be at least partially replaced by Si and N. The element A may in particular be selected from the group consisting of yttrium (Y), gadolinium (Gd), terbium (Tb) and lutetium (Lu). Furthermore, Gd and / or Tb are present in an amount in particular only up to about 20% of A. In a specific embodiment, the garnet luminescent material includes (Y 1- x Lu x )3B5O 12 :Ce, wherein x is equal to or greater than 0 and equal to or less than 1. The term ":Ce" means that part of the metal ions in the luminescent material (i.e., in garnet: part of the "A" ions) are replaced by Ce. For example, in (Y 1-x Lu x )3Al5O 12 In the case of Ce, part of Y and / or Lu is replaced by Ce. This is known to those skilled in the art. Ce will usually replace A by no more than 10%; usually, the Ce concentration will be in the range of 0.1 to 4% (relative to A), especially 0.1 to 2%. Assuming that Ce is 1% and Y is 10%, the complete and correct molecular formula should be (Y 0.1 Lu 0.89 Ce 0.01 )3Al5O 12 As known to those skilled in the art, Ce in garnet is substantially or only in a trivalent state.

[0143] In an embodiment, the luminescent material (therefore) comprises A3B5O 12 , wherein in a specific embodiment, up to 10% of BO can be replaced by Si-N.

[0144] In a specific embodiment, the luminescent material includes (Y x1-x2-x3 A' x2 Ce x3 )3(Al y1-y2 B' y2 )5O 12, 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, for example > 0.2, for example at least 0.8. The garnet containing Y can provide a suitable spectral power distribution.

[0145] In a particular embodiment, up to 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 particular embodiment, B - O can refer to Al - O. As described above, in a particular embodiment, x3 can be selected from the range of 0.001 - 0.04. In particular, this luminescent material can have a suitable spectral distribution (but see below), have a relatively high efficiency, have a relatively high thermal stability, and allow a high CRI (in combination with the source light and the second source light (and the optical filter)). Thus, in a particular 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 (Y x1-x2-x3 (Lu,Gd) x2 Ce x3 )3(Al y1-y2 Ga y2 )5O 12 , where Lu and / or Gd is available. Even more particularly, x3 is selected from the range of 0.001 - 0.1, where 0 < x2 + x3 ≤ 0.1, and where 0 ≤ y2 ≤ 0.1. Further, in a specific embodiment, up to 1% of B - O can be replaced by Si - N. Here, the percentage refers to moles (as is known in the art); see, for example, EP3149108. In yet another specific embodiment, the luminescent material includes (Y x1-x3 Ce x3 )3Al5O 12 , where x1 + x3 = 1, and where 0 < x3 ≤ 0.2, for example 0.001 - 0.1.

[0146] In a specific embodiment, the light - generating device can include only a luminescent material selected from the cerium - containing garnet type. In an even further specific embodiment, the light - generating device includes a single type of luminescent material, such as (Y x1-x2-x3 A' x2 Ce x3 )3(Al y1-y2 B' y2 )5O 12Thus, in a specific embodiment, the light generating device includes a luminescent material, wherein at least 85 weight (wt.) %, even more particularly at least about 90 wt. %, for example even more particularly at least about 95 weight % of the luminescent material comprises (Y x1-x2-x3 A' x2 Ce x3 )3(Al y1-y2 B' y2 )5O 12 . Wherein, A' includes one or more elements selected from the group consisting of lanthanide elements, B' includes one or more elements selected from the group consisting of Ga, In, and Sc, wherein x1 + x2 + x3 = 1, wherein x3 > 0, wherein 0 < x2 + x3 ≤ 0.2, wherein y1 + y2 = 1, wherein 0 ≤ y2 ≤ 0.2. In particular, x3 is selected from the range of 0.001 - 0.1. Note that in the embodiment x2 = 0. Alternatively or additionally, in the embodiment y2 = 0.

[0147] In a specific embodiment, A may particularly at least contain Y, and B may particularly at least contain Al.

[0148] The garnet - type luminescent material can also be described by the alternative molecular formula A3B'2C”3O 12 . Wherein, A may include one or more of the following: (i) rare - earth ions, such as one or more selected from Y 3+ , Lu 3+ , Gd 3+ , Tb 3+ , La 3+ , and (ii) divalent cations, such as Ca 2+ . Wherein, B may include one or more of the following: (i) trivalent cations, such as Al 3+ , Ga 3 + , Sc 3+ , Sb 3+ , and In 3+ , and (ii) divalent cations, such as Mg 2+ and Mn 2+ . Here, C may include one or more of the following: (i) trivalent cations, such as Ga 3+ and Al 3+ , (ii) divalent cations, such as Mn 2+ , and (iii) tetravalent cations, such as Si 4+ and Ge 4+ . Using these ions, the garnet crystal structure can be maintained. Other substitutions than those described above are also possible.

[0149] Alternatively or additionally, the luminescent material may be, for example, M2Si5N8:Eu 2+ and / or MAlSiN3:Eu 2+ and / or Ca2AlSi3O2N5:Eu 2+ etc., wherein M comprises one or more of Ba, Sr and Ca, and in particular comprises at least Sr in the embodiment. In a specific embodiment, the first luminophore may comprise one or more materials selected from the group consisting of (Ba,Sr,Ca)S:Eu, (Ba,Sr,Ca)AlSiN3:Eu and (Ba,Sr,Ca)2Si5N8:Eu. In these compounds, europium (Eu) is substantially or only divalent and replaces one or more of the indicated divalent cations. Typically, Eu will not be present in an amount greater than 10% of the cations; its presence will particularly be in the range of about 0.5 to 10%, more particularly in the range of about 0.5 to 5%, relative to the cation(s) it replaces. The term ":Eu" means that part of the metal ions are replaced by Eu (in these examples by Eu 2+ For example, assuming that the Eu content in CaAlSiN3:Eu is 2%, the correct molecular formula should be (Ca 0.98 Eu 0.02 )AlSiN3. Divalent europium will typically replace divalent cations, such as the above-mentioned divalent alkaline earth cations, especially Ca, Sr or Ba. The material (Ba,Sr,Ca)S:Eu can also be expressed as MS:Eu, wherein M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca); in particular, M contains calcium or strontium, or calcium and strontium, more particularly calcium in the compound. Here, Eu is introduced and replaces at least a portion of M (i.e. one or more of Ba, Sr and Ca). In addition, the material (Ba,Sr,Ca)2Si5N8:Eu can also be expressed as M2Si5N8:Eu, wherein M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca); in particular, M contains Sr and / or Ba in the compound. In another specific embodiment, M consists of Sr and / or Ba (excluding the presence of Eu), especially 50% to 100%, more especially 50% to 90% Ba and 50% to 0%, especially 50% to 10% Sr, for example Ba 1.5 Sr 0.5Si5N8:Eu (i.e., 75% Ba; 25% Sr). Here, Eu is introduced and replaces at least a portion of M, i.e., one or more of Ba, Sr and Ca). Similarly, the material (Ba, Sr, Ca)AlSiN3:Eu can also be expressed as MAlSiN3:Eu, wherein M is one or more elements selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca); in particular, M contains calcium or strontium, or calcium and strontium, more particularly calcium in the compound. Here, Eu is introduced and replaces at least a portion of M (i.e., one or more of Ba, Sr and Ca). As is known to those skilled in the art, Eu in the above-mentioned luminescent material is substantially or only in a divalent state. Therefore, this nitride luminescent material can also be or contain a converter element, here in particular Eu. 2+ .

[0150] In particular, the luminescent material may be an inorganic luminescent material, such as one or more of oxides, oxynitrides or nitrides including the above-mentioned trivalent cerium or divalent europium.

[0151] The luminescent material is configured to convert at least a portion of the first radiation (selected from one or more of UV radiation and visible radiation) into luminescent material light. In particular, in an embodiment, the luminescent material may be configured to convert at least a portion of the blue light (as radiation) into luminescent material light. In particular, when the blue light is partially converted, the blue light can be used as a blue light source (for device light) and as excitation light convertible by the luminescent material. The first radiation may in particular be provided by a (solid-state) light source.

[0152] When different luminescent materials are applied, one or more luminescent materials can be configured to convert the laser light source light into one or more of green and yellow luminescent material lights, and one or more other luminescent materials can be configured to convert the laser light source light into one or more of orange and red luminescent material lights.

[0153] In a particular embodiment, the luminophore comprises a ceramic body comprising a luminescent material. Ceramic bodies are known in the art. Alternatively, the luminophore comprises a single crystal. In yet another particular embodiment, different types of luminophores may be applied. Therefore, the luminophore may be selected from, in particular, single crystals and ceramic bodies. The latter may be easier to manufacture than the former, but they may still have good optical and / or thermal properties. Therefore, in an embodiment, the luminophore may be a ceramic body. However, in a particular embodiment, a combination of single crystals and ceramic bodies may also be applied. In particular, the luminophore comprises a ceramic luminophore. Therefore, in a particular embodiment, the luminophore is defined by a ceramic luminescent material. Therefore, in a particular embodiment, the luminescent material is a luminescent material that can provide a ceramic luminophore. Therefore, the luminophore may comprise a ceramic luminophore.

[0154] Therefore, in an embodiment, at least one of the first light emitter and the second light emitter may include A3B5O 12 :Ce type luminescent material.

[0155] In an embodiment, one or more of the following may be applicable to the light generating system: (a) the first light emitter may be configured to absorb part of the device light, convert it into the first luminescent material light, and reflect or transmit (another) part of the device light; and (b) the second light emitter may be configured to absorb part of the device light, convert it into the second luminescent material light, and reflect or transmit (another) part of the device light. In addition, in an embodiment, the system light may include unconverted device light. In particular, unconverted device light reflected at or transmitted by the first light emitter and / or unconverted device light reflected at or transmitted by the second light emitter. Therefore, in an embodiment, the system light may include blue unconverted device light and (yellow) luminescent material light, that is, the system light may be white light.

[0156] In an embodiment, the first luminophore may be configured to absorb a portion of the device light and convert it into the first luminescent material light. In such an embodiment, the first luminophore may also be configured to reflect or transmit (another) portion of the device light. For example, in such an embodiment, the first luminophore may be configured to absorb and convert s-polarized device light, while it may be configured to reflect or transmit p-polarized device light.

[0157] In further embodiments, the second luminophore may be configured to absorb a portion of the device light and convert it into a second luminescent material light. In such embodiments, the second luminophore may also be configured to reflect or transmit (another) portion of the device light. For example, in such embodiments, the second luminophore may be configured to absorb and convert s-polarized device light, while it may be configured to reflect or transmit p-polarized device light.

[0158] In embodiments, the system light may include unconverted device light, in particular unconverted device light reflected at or transmitted by a first light emitter. In other embodiments, the system light may include unconverted device light, in particular unconverted device light reflected at or transmitted by a second light emitter. In still other embodiments, the system light may include unconverted device light, in particular unconverted device light reflected at or transmitted by a first light emitter and a second light emitter. Thus, in the embodiments described herein, the system light may be substantially blue light.

[0159] However, in an embodiment, the system light may also include the first luminescent material light converted by the first luminophore and / or the second luminescent material light converted by the second luminophore. Thus, in an embodiment, the system light may include the first and second luminescent material light. Additionally or alternatively, the system light may include unconverted (blue) device light and the first and / or second luminescent material light, i.e. the system light may be substantially white light.

[0160] The first and / or second luminous body can be operated in a transmission mode or a reflection mode. Here, when the indicating element is operated in a transmission mode, this may mean in an embodiment that at one or more wavelengths, the portion of radiation transmitted may be greater than the portion of radiation reflected or absorbed. Here, when the indicating element is operated in a reflection mode, this may mean in an embodiment that at one or more wavelengths, the portion of radiation reflected may be greater than the portion of radiation transmitted or absorbed. In a particular embodiment, the first luminous body can be operated in a transmission mode, while the second luminous body can be operated in a transmission mode. However, in another embodiment, the first luminous body can be operated in a reflection mode, while the second luminous body can be operated in a reflection mode. In yet another embodiment, the first luminous body can be operated in a reflection mode, while the second luminous body can be operated in a transmission mode. In yet another embodiment, the first luminous body can be operated in a transmission mode, while the second luminous body can be operated in a reflection mode. In particular, in an embodiment, the first luminous body can be operated in a reflection mode, while the second luminous body can be operated in a reflection mode.

[0161] In a particular embodiment, the first light emitter and the second light emitter may both be operated in a reflective mode. This facilitates the heat dissipation capability of the light generating system.

[0162] In an embodiment, the system light may have a controllable correlated color temperature. The controllable correlated color temperature may include a color temperature that differs by at least 1000 K depending on the polarization of the device light. In particular, in an embodiment, the first beam of system light may have a correlated color temperature of at least 7000 K. In such an embodiment, the second beam of system light may have a correlated color temperature of a maximum of 4000 K.

[0163] System light may have a correlated color temperature (see also above).

[0164] In an embodiment, the control system may be configured to control the correlated color temperature of the system light. For example, the correlated color temperature of the system light may be controlled by controlling the polarization of the device light, i.e. by controlling which light emitter the device light is directed to. Thus, the system light may have a controllable correlated color temperature. In an embodiment, the controllable correlated color temperature of the system light may in particular comprise a correlated color temperature that differs by at least 1000K, such as at least 1500K, at least 2000K, in particular at least 3000K, more in particular at least 4000K, depending on the polarization of the device light. Thus, the polarization of the device light may have an influence on the correlated color temperature of the system light.

[0165] In an embodiment, the first beam of system light may have a correlated color temperature in the range of 6000-20000 K, such as in the range of 7000-15000 K, in particular in the range of 8000-12000 K. The first beam of system light may in particular have a correlated color temperature of at least 7000 K, such as at least 8000 K, such as at least 9000 K, in particular at least 10000 K. Thus, in an embodiment, the first beam of system light may be a cool, i.e. blue (hue) system beam.

[0166] In further embodiments, the second beam of system light may have a correlated color temperature in the range of 2200-5000 K, such as in the range of 2500-4000 K, in particular in the range of 2700-3700 K. The first beam of system light may in particular have a correlated color temperature of at most 4000 K, for example at most 3000 K, such as at most 2500 K, in particular at most 2200 K. Thus, in embodiments, the first beam of system light may be a warm, i.e. yellow (hue) system beam.

[0167] In further embodiments, the light generating system may include a heat transfer system. The heat transfer system may be specifically configured to transfer heat from one or more of the first light emitter and the second light emitter.

[0168] In an embodiment, the heat transfer system can transfer heat between two locations based on thermal conductivity and phase change. In particular, the heat transfer system can transfer heat between the first and / or second light emitter and the surrounding environment.

[0169] Here, in an embodiment, the heat transfer system may include one or more heat pipes (e.g., a vapor chamber), a heat sink, a fan, and a sapphire substrate. In particular, in an embodiment, the heat transfer system may include one or more of a heat pipe (e.g., a vapor chamber) and a heat sink.

[0170] In a particular embodiment, the cooling liquid may be transformed into vapor by absorbing heat at a heat source, after which it may travel along a heat pipe or heat sink to a heat exchanger where the vapor may condense into liquid and release latent heat.

[0171] Heat pipes are known in the art. The heat transfer system herein may include one or more heat pipes in particular. In an embodiment, one or more heat pipes may be rod-shaped. In addition, in an embodiment, one or more heat pipes may include a material selected from a group including copper, steel, aluminum and an alloy. The heat pipe may also include a (volatile) cooling fluid, such as water. In addition, in an embodiment, one or more heat pipes may be configured so that they can support the first and / or second illuminant. In particular, in an embodiment, one or more heat pipes may connect the first and / or second illuminant to a collimator.

[0172] In an embodiment, the heat pipe may include a steam chamber. The steam chamber may include a steam chamber defined at least in part by two plates arranged in parallel, i.e., in an embodiment, the steam chamber may include a first plate and a second plate, in particular with a steam chamber in the middle. The first plate and the second plate may be arranged in parallel in particular. Therefore, in an embodiment, the steam chamber may be defined by at least a first plate and a second plate having an average plate distance equal to the chamber height, i.e., the first plate and the second plate may define the chamber height. At the edges of the plates, the plates may be welded together to provide a closed chamber. The plates may also define the steam chamber together with one or more edges. In an embodiment, the plates may be arranged in parallel on most of the first plate and most of the second plate. For example, the plates may be arranged in parallel on at least 50% (e.g., at least 80%, e.g., at least 90%) of the area of ​​the first plate and at least 50% (e.g., at least 80%, e.g., at least 90%) of the area of ​​the second plate. Therefore, on most of the first plate and most of the second plate, the distance between the plates may be substantially unchanged. The first plate and the second plate may particularly be approximately (identical) rectangular shapes, such as rounded rectangular shapes. In particular, the term "parallel" with respect to plates arranged in parallel may in this context mean that over a large part of the plates, the two plates have substantially the same (closest) distance to each other. Thus, the two plates may for example be curved, in particular with the same radius of curvature, and still be considered to be parallel. Thus, in such an embodiment, the (elongated) chamber may be a steam chamber.

[0173] In an embodiment, the chamber volume of the chamber is at least (approximately) 1 mm 3 , for example at least 0.5 cm 3 , in particular at least (approximately) 1 cm 3 , for example at least about 2 cm 3 , in particular at least about 5 cm 3 , for example about 10 cm 3 In embodiments, the chamber volume is at most (approximately) 1000 cm 3 , for example up to 500cm 3 , especially up to 100cm 3 , for example up to 25cm 3 , even more particularly up to (approximately) 10 cm 3 In particular, when the chamber volume is large, it can also serve as a (auxiliary) heat sink.

[0174] The heat sink may (passively) transfer heat generated by the light generating device to a fluid medium, such as air or a liquid coolant. Thus, heat may be dissipated from the light generating device. In an embodiment, the heat transfer system may include one or more heat sinks.

[0175] Factors such as material selection, protrusion design, and surface treatment may affect the performance of the heat sink. Therefore, in an embodiment, one or more heat sinks may include a material selected from the group consisting of aluminum, copper, or an alloy. In an embodiment, one or more heat sinks may include one or more of a plurality of pins, a plurality of straight fins, a plurality of flared fins, and combinations thereof.

[0176] The heat transfer system can be configured to transfer heat from one or more of the first light emitter and the second light emitter, for example. The heat can be dissipated to the outside of the system, for example, through a heat pipe (e.g., a steam chamber, a heat sink, and a sapphire substrate). Alternatively or additionally, a fan can be used to transfer the dissipated thermal energy from one or more of the first light emitter and the second light emitter. In an embodiment, the heat transfer system can therefore include, for example, one or more heat sinks configured to transfer heat from one or more of the first light emitter and the second light emitter.

[0177] In an embodiment, the heat transfer system may further comprise a fan, in particular a fan selected from the group consisting of an axial fan and a centrifugal fan, in particular an axial fan, or in particular a centrifugal fan. The fan may in particular comprise fan blades.

[0178] In another embodiment, the heat transfer system may include a sapphire substrate, i.e., a crystallized Al2O3 substrate. Sapphire is a birefringent material with strong resistance to thermal shock and high temperature. In addition, sapphire has thermal conductivity. Therefore, sapphire is widely used as a heat dissipation material. Here, the sapphire substrate can be used as an optical window (or "filter") for heat dissipation and light transmission.

[0179] Therefore, the heat transfer system may include a light-transmitting heat conductor. The light-transmitting heat-conducting material may be particularly configured to be in thermal contact with the second luminous body. In an embodiment, one or more of the heat pipe and the light-transmitting heat conductor may be configured to be in thermal contact with the second luminous body. In particular, one or more of the heat pipe and the light-transmitting heat conductor may be configured to support the second luminous body. More particularly, the light-transmitting heat conductor may transmit one or more of the device light, the first luminescent material light, the second luminescent material light, and the system light.

[0180] Which illuminant is illuminated by the device light can be based on polarization, but not necessarily based on polarization. In an embodiment, the device light can be directed to the corresponding illuminant because the device light can illuminate the optical component, in particular the reflector device, from different sides. In an embodiment, the reflector device may include one or more reflectors, such as one reflector, in particular two reflectors. In another embodiment, the reflector device may include one or more reflectors, such as one or more double-sided reflectors, curved reflectors, prism-shaped reflectors, reflective polarizers, dichroic reflectors or specular reflectors. The reflector device may be particularly configured in a collimator. For example, when one or more optical elements are used to divide the device beam into two different beams, such as using a shutter, the two different beams can reach the reflector device from different sides. Which illuminant is illuminated can be controlled by controlling the shutter using a control system. Of course, this can also be achieved when two light generating devices arranged at different positions are used. In this way, two different (for example, opposite) device beams can also be generated, which can be easily controlled using a control system by controlling the light generating device.

[0181] Thus, in certain embodiments, the optical device may include a reflector device, wherein the one or more light generating devices are configured to illuminate the reflector device from different sides of the reflector device. In particular, the one or more light generating devices and the reflector device may be configured to illuminate a first light emitter and a second light emitter. Furthermore, in embodiments, the control system may be configured to control which light emitter is illuminated by the device light.

[0182] The light generating system may be part of or applied to office lighting systems, home application systems, store lighting systems, home lighting systems, accent lighting systems, spotlighting systems, theater lighting systems, fiber optic application systems, projection systems, self-luminous display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, indicator sign systems, decorative lighting systems, portable systems, automotive applications, (outdoor) road lighting systems, urban lighting systems, greenhouse lighting systems, horticultural lighting, digital projection or LCD backlighting. The light generating system (or luminaire) may be part of or applied to an optical communication system or a disinfection system.

[0183] On the other hand, the present invention also provides a lamp or lamp comprising a light generating system as defined herein. The lamp may also include a housing, an optical element, a shutter, etc. The lamp or lamp may also include a housing surrounding the light generating system. The lamp or lamp may include a light window or housing opening in the housing, through which the system light can escape from the housing. On the other hand, the present invention also provides a projection device comprising a light generating system as defined herein. In particular, a projection device or "projector" or "image projector" may be an optical device that projects an image (or moving image) onto a surface (e.g., a projection screen). The projection device may include one or more light generating systems as described herein. Therefore, in one aspect, the present invention also provides a lighting device selected from a group of lamps, lamps, projector devices, disinfection equipment, photochemical reactors, and optical wireless communication devices, including a light generating system as defined herein. The lighting device may include a housing or carrier configured to accommodate or support one or more elements of the light generating system. For example, in an embodiment, the lighting device may include a housing or carrier configured to accommodate or support one or more of one or more light generating devices, collimators, control systems, and heat transfer systems.

[0184] The terms "visible", "visible light" or "visible emission" and similar terms refer to light having one or more wavelengths in the range of about 380-780 nm. Herein, UV may particularly refer to wavelengths selected from the range of 190-380 nm, such as 200-380 nm.

[0185] The terms "light" and "radiation" are used interchangeably herein, unless it is clear from the context that the term "light" refers only to visible light. The terms "light" and "radiation" may therefore refer to UV radiation, visible light, and IR radiation. In certain embodiments, particularly for lighting applications, the terms "light" and "radiation" refer (at least) to visible light.

[0186] The terms "violet light" or "violet emission" and similar terms may particularly relate to light having a wavelength range of about 380-440 nm. In certain embodiments, violet light may have a centroid wavelength in the range of 380-440 nm. The terms "blue light" or "blue emission" and similar terms may particularly relate to light having a wavelength range of about 440-490 nm (including some violet and cyan). In certain embodiments, blue light may have a centroid wavelength in the range of 440-490 nm. The terms "green light" or "green emission" and similar terms may particularly relate to light having a wavelength range of about 490-560 nm. In certain embodiments, green light may have a centroid wavelength in the range of 490-560 nm. The terms "yellow light" or "yellow emission" and similar terms may particularly relate to light having a wavelength range of about 560-590 nm. In certain embodiments, the centroid wavelength of yellow light may be in the range of 560-590 nm. The terms "orange light" or "orange emission" and similar terms may particularly relate to light having a wavelength range of about 590-620 nm. In a particular embodiment, the centroid wavelength of orange light may be in the range of 590-620 nm. The terms "red light" or "red emission" and similar terms may particularly relate to light in the wavelength range of about 620-750 nm. In a particular embodiment, the centroid wavelength of red light may be in the range of 620-750 nm. The terms "cyan light" or "cyan emission" and similar terms may particularly relate to light in the wavelength range of about 490-520 nm. In a particular embodiment, cyan light may have a centroid wavelength in the range of 490-520 nm. The terms "amber light" or "amber emission" and similar terms may particularly relate to light in the wavelength range of about 585-605 nm, for example about 590-600 nm. In a particular embodiment, amber light may have a centroid wavelength in the range of 585-605 nm. The phrase "light having one or more wavelengths in the wavelength range" and similar phrases may particularly indicate that the indicated light (or radiation) has a spectral power distribution having at least an intensity at these one or more wavelengths in the indicated wavelength range. For example, a blue emitting solid state light source will have a spectral power distribution having intensity at one or more wavelengths in the 440-495 nm wavelength range.

[0187] A light generating device or light generating system may be configured to generate device light (or "light generating device light") or system light ("or light generating system light"). As mentioned above, the terms "light" and "radiation" may be used interchangeably.

[0188] The light generating device may comprise a light source. In embodiments, the device light may comprise one or more of a light source light and a converted light source light (eg a luminescent material light).

[0189] The light generating system may include a light source. In an embodiment, the system light may include one or more of a light source light and a converted light source light (eg, luminescent material light).

[0190] In certain embodiments, the term UV radiation may refer to near UV radiation (NUV). Thus, the term "(N)UV" is also used herein to refer to UV in general and NUV in certain embodiments. In certain embodiments, the term IR radiation may refer to near IR radiation (NIR). Thus, the term "(N)IR" is also used herein to refer to IR in general and NIR in certain embodiments.

[0191] Herein, IR (infrared) may particularly refer to radiation having a wavelength selected from the range of 780-3000 nm, such as 780-2000 nm, such as a wavelength up to about 1500 nm, such as a wavelength of at least 900 nm, although in certain embodiments, other wavelengths are possible. Thus, the term IR may herein refer to one or more of near infrared (NIR (or IR-A)) and short wavelength infrared (SWIR (or IR-B)), especially NIR.

[0192] The term "centroid wavelength", also denoted λc, is known in the art and refers to the wavelength value at which half of the light energy is at shorter wavelengths and half at longer wavelengths; the value is measured in nanometers (nm). It is the wavelength that divides the integral of the spectral power distribution into two equal parts, as shown in the formula λc = ∑λ*I(λ) / (∑I(λ)), where the sum is performed over the wavelength range of interest and I(λ) is the spectral energy density (i.e., the integral of the product of wavelength and intensity over the emission band, normalized to the integrated intensity). The centroid wavelength can be determined, for example, under operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0193] Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which corresponding reference characters indicate corresponding parts and in which:

[0194] Figure 1A-Figure 3 schematically illustrates embodiments and some general aspects of the invention; and

[0195] Figure 4 Embodiments of applications are schematically depicted.

[0196] The schematic diagrams are not necessarily drawn to scale. DETAILED DESCRIPTION

[0197] Figure 1A-1B Some embodiments of the invention are schematically depicted. In an embodiment, the invention may be a light generating system 1000 comprising one or more light generating devices 100 , a first light emitter 210 , a second light emitter 220 , an optical device 400 , a collimator 500 and a control system 300 .

[0198] In particular, in embodiments, the one or more light generating devices 100 may be configured to generate device light 101 having a first wavelength λ1 and optionally having a controllable polarization. Furthermore, in embodiments, the one or more light generating devices 100 may include one or more solid-state light sources, in particular laser light sources (e.g. diode lasers).

[0199] Furthermore, in an embodiment, the collimator 500 may have a first end 501 and a second end 502. In particular, the collimator 500 may taper from the second end 502 to the first end 501. The first end 501 and the second end 502 may in particular be separated by a collimator height h.

[0200] Furthermore, in an embodiment, the first light emitter 210 may be configured to convert at least a portion of the light having the first wavelength λ1 into the first light emitting material light 211. Likewise, in an embodiment, the second light emitter 220 may be configured to convert at least a portion of the light having the first wavelength λ1 into the second light emitting material light 221. In an embodiment, the first light emitter 210 and the second light emitter 220 may be particularly configured in the collimator 500. In particular, the first light emitter 210 may be configured closer to the first end 501 than the second light emitter 220, and the second light emitter 220 may be configured closer to the second end 502 than the first light emitter 210. Furthermore, in an embodiment, the first light emitter 210 and the second light emitter 220 may be configured to be in thermal contact with one or more heat sinks 730 (see Figure 3 )--a heat transfer system (700) configured to transfer heat from one or more of the first light emitter (210) and the second light emitter (220).

[0201] Furthermore, in embodiments, the optical device 400 may be configured to direct the device light 101 to the first light emitter 210 or the second light emitter 220, for example, depending on the polarization of the device light 101 (see Figure 1B ) or not necessarily polarization dependent (see Figure 1A ).

[0202] exist Figure 1A In the embodiment of the present invention, the optical device 400 may include a reflector device 440, which includes one or more reflectors, such as one or more of a two-sided reflector, a curved reflector, a prismatic reflector, a reflective polarizer, a dichroic reflector, or a specular reflector. The light generating device 100 using the light generating device 100 illuminating the reflector 440 from different sides may allow addressing different light emitters 210, 220. In this way, the control system 300 can control the beam shape of the system light 1001 by controlling the light generating device 100.

[0203] The light generating system 1000 may be configured to generate system light 1001 . In an embodiment, the system light 1001 may include one or more of the first luminescent material light 211 and the second luminescent material light 221 .

[0204] Especially refer to Figure 1B In an embodiment, the control system 300 may be configured to control one or more of the polarization and the radiant flux of the device light 101 .

[0205] In an embodiment, the first luminophore 210 may include a first luminescent material 215. Likewise, in an embodiment, the second luminophore 220 may include a second luminescent material 216. In particular, the first luminescent material 215 and the second luminescent material 216 may be different.

[0206] Furthermore, in an embodiment, at least one of the first luminescent material 215 and the second luminescent material 216 may include A3B5O. 12 :Ce 3+ In an embodiment, A may include one or more of Y, La, Gd, Tb and Lu, in particular (at least) one or more of Y, Gd, Tb and Lu. In addition, in an embodiment, B may include one or more of Al, Ga, In and Sc, in particular at least one or more of Al and Ga.

[0207] In an embodiment, the collimator 500 may include a hollow first reflector 530 (see Figure 1A , Figure 1B and Figure 1D In other embodiments, the collimator may include a TIR reflector 540 (see Figure 1E ). In such an embodiment, the TIR reflector 540 may include a cavity 541. Additionally or alternatively, the cavity 541 may include a third reflector 470. In particular, in an embodiment, the third reflector 470 may be attached to the first end 501 of the collimator 500. In an embodiment, the third reflector 470 may be substantially comprised by the collimator wall 505.

[0208] Furthermore, in embodiments, the one or more light generating devices 100 may include one or more lasers. In other embodiments, the one or more light generating devices 100 may include one or more superluminescent diodes. In other embodiments, the one or more light generating devices 100 may include one or more lasers and one or more superluminescent diodes.

[0209] Figure 1CAn embodiment of a light generating system 1000 is schematically shown, comprising a first light generating device 110 and a second light generating device 120, the first light generating device 110 being configured to generate a first device light 111 having a first polarization, the second light generating device 120 being configured to generate a second device light 121 having a second polarization. The second polarization may in particular be different from the first polarization. Furthermore, in an embodiment, the control system 300 may be configured to control the first light generating device 110 and the second light generating device 120.

[0210] In an embodiment, the light generating system 1000 may further include a laser group 1100 (see Figure 1C (III)). The laser group 1100 may accommodate a first light generating device 110 and a second light generating device 120. In particular, in an embodiment, the first light generating device 110 may include a first laser, and the second light generating device 120 may include a second laser.

[0211] Additionally or alternatively, the light generating system 1000 may include a polarization control system 610 configured to control the polarization of the device light 101 (see Figure 1C (IV)). In addition, the control system 300 may be configured to control a polarization control system 610. In an embodiment, the polarization control system 610 may be configured to change the polarization state of light and / or control the polarization state of light. In addition, in an embodiment, the polarization control system 610 may include a half-wave plate with a controllable fast axis rotation.

[0212] Figure 1B An embodiment is schematically shown, in which the optical device 400 may include a polarization beam splitter 410 and a retarder device 420 configured in a collimator 500. In particular, the polarization beam splitter 410 may be configured to be in a light receiving relationship with one or more light generating devices 100. Furthermore, in an embodiment, the polarization beam splitter 410 may be configured to direct at least a portion of the received device light 101 in the direction of the first light emitter 210 or the second light emitter 220 when the device light 101 has a first polarization, and to direct at least a portion of the received device light 101 to the retarder device 420 when the device light 101 has a second polarization different from the first polarization. Furthermore, in such an embodiment, the other of the first light emitter 210 and the second light emitter 220 may be configured to be in a light receiving relationship with the one or more light generating devices 100 via the retarder device 420 and the polarization beam splitter 410. Furthermore, in such an embodiment, the second light emitter 220 may be configured to receive at least a portion of the device light 101 having the second polarization.

[0213] In an embodiment, the retarder device 420 may include (i) a retarder 421, wherein the retarder 421 may include a quarter wave plate 422, and (ii) a second reflector 430. The retarder device 420 may be particularly configured outside the collimator 500.

[0214] In certain embodiments, the one or more light generating devices 100 may be arranged outside the collimator 500. The collimator 500 may particularly include a collimator wall 505. In an embodiment, the collimator wall 505 may taper in a direction from the second end 502 to the first end 501. Furthermore, in an embodiment, the collimator wall 505 may include a first opening 506 arranged between the one or more light generating devices 100 and the polarization beam splitter 410. The collimator wall 505 may also include a second opening 507 arranged between the polarization beam splitter 410 and the retarder device 420.

[0215] Furthermore, in an embodiment, the first light emitter 210 and the collimator 500 may be configured such that the first light beam 2111 of the system light 1001 may have a first beam angle β1 (see Figure 1B (II)). The first light beam 2111 of the system light 1001 may specifically include the first luminescent material light 211. Furthermore, the beam angle β1 may be defined by a full width at half maximum of 2°.

[0216] In addition, in the embodiment, the second light emitter 220 and the collimator 500 may be configured such that the second light beam 2211 of the system light 1001 may have a second beam angle β2 (see Figure 1B (III)). The second light beam 2211 of the system light 1001 may specifically include the second luminescent material light 221. Furthermore, the beam angle β2 may be defined by a full width at half maximum of at least 5°.

[0217] In an embodiment, the collimator 500 may have a focal point 550 (see Figure 1A ). In addition, in an embodiment, the first light emitter 210 may have a first distance d1 to the focal point 550. Likewise, the second light emitter 220 may have a second distance d2 to the focal point 550. In particular, d1 / d2≤0.1.

[0218] In an embodiment, one or more light generating devices 100 , first light emitters 210 and second light emitters 220 may be selected and configured such that a spectral characteristic 1001 selected from a color point and a correlated color temperature of the system light may depend on the polarization of the device light 101 .

[0219] In embodiments, the first luminophore 210 may be configured to absorb a portion of the device light 101 and convert it into the first luminescent material light 211, and reflect or transmit (another) portion of the device light 101. In other embodiments, the second luminophore 220 may be configured to absorb a portion of the device light 101 and convert it into the second luminescent material light 221, and reflect or transmit (another) portion of the device light 101. In such embodiments, the system light 1001 may include unconverted device light 101 reflected at or transmitted by the first luminophore 210 and / or unconverted device light 101 reflected at or transmitted by the second luminophore 220.

[0220] In another embodiment, the first light emitter 210 can be operated in a transmissive mode, and the second light emitter 220 can be operated in a transmissive mode (see Figure 1D (I)). In another embodiment, the first light emitter 210 can be operated in a reflective mode, and the second light emitter 220 can be operated in a reflective mode (see Figure 1D (II)). In other embodiments, the first light emitter 210 may be operated in a reflective mode, while the second light emitter 220 may be operated in a transmissive mode. In other embodiments, the first light emitter 210 may be operated in a transmissive mode, while the second light emitter 220 may be operated in a reflective mode.

[0221] For example, refer to Figure 1D In a particular embodiment, the optical device 400 may include a reflector device 440, wherein one or more light generating devices 100 are configured to illuminate the reflector device 440 from different sides of the reflector device 440. The light generating device 100 on the left illuminates the first light emitter 210 when turned on. The light generating device 100 on the right illuminates the second light emitter 220 when turned on.

[0222] In particular, the one or more light generating devices 100 and the reflector arrangement 440 may be configured to illuminate the first light emitter 210 and the second light emitter 220. Furthermore, in an embodiment, the control system 300 may be configured to control which light emitter is illuminated by the device light 101 .

[0223] Figure 1E An embodiment of a TIR collimator 540 is schematically shown. The first light emitter 210 and the second light emitter 220 and the beam splitter 410 may be arranged in a cavity 541. Note that Figure 1D The embodiment schematically shown in FIG. 5 can also be applied together with a TIR collimator 540. The focus of the TIR collimator 540 can be configured in the cavity 541. Figure 1D (as an example) and Figure 1E In an embodiment, the collimator 500 may be hollow or may include a cavity 541. Figure 1E As schematically shown in FIG. 5 , the third reflector 470 may in particular be arranged in the (optical) cavity 541. More specifically, in an embodiment, the third reflector 470 may be attached to the first end 501 of the collimator 500.

[0224] In an embodiment, the distance between the first illuminant 210 and the second illuminant 220 may be at least 0.2 times the height h of the collimator 500, the height h of the collimator 500 being defined as the distance between the first end 501 and the second end 502, preferably at least 0.3 times the height h, more preferably at least 0.4 times the height h, more preferably at least 0.5 times the height h. The second illuminant 220 may be arranged closer to the second end 502 than the first end 501. The first illuminant 210 may be arranged closer to the first end 501 than the second end 502.

[0225] See also Figure 1A , a reflector arrangement 440 may be used which may include one or more (specularly reflective) reflectors. The one or more specular reflectors may include a reflective polarizer.

[0226] refer to Figure 1A-1E , the elements of the reflector device 440 configured in the collimator 500 can be much smaller than the cross-section of the collimator 500 located around the reflector device 440. For example, perpendicular to the optical axis O of the collimator 500 c The cross-sectional size of may be at most 30%, such as at most 20%, more particularly at most 15%, such as at most 10%, of the cross-sectional area of ​​the collimator 500 .

[0227] When two types of device light (101) with different spectral power distributions are available, a dichroic mirror may be used instead of a polarizing beam splitter.

[0228] refer to Figure 1A-1EIn an embodiment, different luminous bodies may be illuminated by device light 101 having different polarizations. Therefore, the optical paths to different luminous bodies may depend at least on the polarization of the device light 101. In such an embodiment, the device light 101 illuminating the first luminous body 210 and the device light 101 illuminating the second luminous body 220 may have the same spectral power distribution (although not necessarily so), but in particular may have different polarizations (e.g. s-polarization or p-polarization). For example, a reflective polarizer may be applied. In (other) embodiments, different luminous bodies may be illuminated by the device light 101 through at least two beams propagated via different optical paths. A reflective surface may guide the device light 101 from one direction to one of the luminous bodies, while (another) reflective surface may guide the device light 101 from another direction to another of the luminous bodies. In such an embodiment, the device light 101 illuminating the first luminous body 210 and the device light 101 illuminating the second luminous body 220 may have the same spectral power distribution, but may also have different spectral power distributions. The polarization may be the same or different. For example, one or more reflectors may be applied. In (yet another) embodiment, different light emitters may be illuminated by device light 101 having different spectral power distributions. Thus, the optical paths to the different light emitters depend at least on the spectral power distribution of the device light 101. In such an embodiment, the device light 101 illuminating the first light emitter 210 and the device light 101 illuminating the second light emitter 220 will have different spectral power distributions. For example, a dichroic mirror may be applied.

[0229] In an embodiment, the system light 1001 may have a controllable correlated color temperature. In particular, the controllable correlated color temperature may include a correlated color temperature that differs by at least 1000K depending on the polarization of the device light 101. More particularly, in an embodiment, the first beam 2111 of the system light 1001 may have a correlated color temperature of at least 7000K. Additionally or alternatively, in an embodiment, the second beam 2211 of the system light 1001 may have a correlated color temperature of a maximum of 4000K.

[0230] Figure 2 Schematically shows a top view of an embodiment of a light generating system. In particular, the collimator 500 may have a collimator axis O c In addition, the collimator 500 may have a c The cross-sectional area A varies along the length o . Cross-sectional area A o It can be defined as perpendicular to the collimator axis O c .

[0231] Collimator axis O cIt can be defined as an imaginary line that defines the path of the system light propagating out of the system through the collimator. In particular, the collimator axis can coincide with the direction of the system light with the highest radiant flux.

[0232] Additionally or alternatively, the first luminous body 210 may have a first cross-sectional area A 11 . The first cross-sectional area A 11 It can be defined as perpendicular to the collimator axis O c Similarly, the second light emitter 220 may have a second cross-sectional area A 12 The second cross-sectional area A 12 It can be defined as perpendicular to the collimator axis O c In addition, in the embodiment, A 11 / A o ≤0.2 and A 12 / A o ≤0.2.

[0233] Figure 3 Schematically shown are additional embodiments of the light generating system 1000. In particular, the light generating system 1000 may include a heat transfer system 700. The heat transfer system 700 may in particular be configured to transfer heat from one or more of the first light emitter 210 and the second light emitter 220.

[0234] Additionally or alternatively, the heat transfer system 700 may include a heat pipe 710 and a light-transmitting heat conductor 720 (see Figure 3 (III)) is configured to be in thermal contact with the second light emitting body 220. In a specific embodiment, the light-transmitting heat conductor 720 can be a sapphire substrate. In addition, in an embodiment, the heat transfer system 700 can specifically include a plurality of heat pipes 710. In an embodiment, the heat pipe 710 can specifically be a steam chamber 750 (see Figure 3 (IV)). In other embodiments, the heat transfer system 700 may include two or more heat sinks 730. In a specific embodiment (not shown here), the heat transfer system 700 may also include a fan.

[0235] refer to Figure 3 , a first heat sink 730 may be applied, for example, thermally coupled (ie, in thermal contact) to the first light emitter 210, and a second heat sink 730 may be applied, for example, thermally coupled to the second light emitter 220, although other arrangements are possible (see Figure 3 ).

[0236] If an element can exchange energy through a thermal process, it can be considered that the element is "in thermal contact" with another element. Therefore, the element can be thermally coupled. In an embodiment, thermal contact can be achieved by physical contact. In an embodiment, thermal contact can be achieved via a thermally conductive material, such as a thermally conductive glue (or thermally conductive adhesive). Thermal contact can also be achieved between two elements when the two elements are arranged relative to each other at a distance equal to or less than about 10 μm, although a larger distance (such as up to 100 μm) is also possible. The shorter the distance, the better the thermal contact. In particular, the distance is 10 μm or less, such as 5 μm or less, such as 1 μm or less. The distance can be the distance between two corresponding surfaces of the corresponding elements. The distance can be an average distance. For example, two elements can be in physical contact at one or more (e.g., multiple) positions, but at one or more (especially multiple) other positions, the elements are not in physical contact. For example, this may be the case when one or both elements have a rough surface. Therefore, in an embodiment, the average distance between the two elements can be 10 μm or less (although a larger average distance is also possible, such as up to 100 μm). In an embodiment, the two surfaces of the two elements can be kept at a certain distance with one or more distance keepers. When the two elements are in thermal contact, they can be in physical contact, or can be configured to be a short distance away from each other, such as a maximum of 10μm, such as a maximum of 1mm. When the two elements are configured to be a certain distance away from each other, an intermediate material can be configured between them, but in other embodiments, the distance between the two elements can be filled with gas or liquid, or can be a vacuum. When an intermediate material is available, the greater the distance, the higher the thermal conductivity, which can be used for thermal contact between the two elements. However, the smaller the distance, the lower the thermal conductivity of the intermediate material may be (of course, materials with higher thermal conductivity can also be used).

[0237] Figure 4 An embodiment of a luminaire 2 comprising a light generating system 1000 as described above is schematically shown. Reference numeral 301 denotes a user interface, which may be functionally coupled to a control system 300 comprised by the light generating system 1000 or functionally coupled to the light generating system 1000. Figure 4 Also schematically shown is an embodiment of a lamp 1 comprising a light generating system 1000. Reference numeral 3 denotes a projector device or a projector system, which can be used for projecting an image, for example on a wall, which can also comprise the light generating system 1000. Thus, Figure 4Schematically, an embodiment of a lighting device 1200 is shown, which is selected from the group of a lamp 1, a lamp fixture 2, a projector device 3, a disinfection device, a photochemical reactor, and an optical wireless communication device, and the lighting device 1200 includes the light generation system 1000 described herein. In an embodiment, such a lighting device can be a lamp 1, a lamp fixture 2, a projector device 3, a disinfection device, or an optical wireless communication device. The lighting device light escaping from the lighting device 1200 is indicated by reference numeral 1201. The lighting device light 1201 can essentially consist of the system light 1001, and can be the system light 1001 in a specific embodiment. Reference numeral 1300 refers to a space, such as a room, wherein reference numeral 1307 corresponds to a wall of the room, reference numeral 1305 corresponds to a floor, and reference numeral 1310 corresponds to a ceiling. Note that the light generation system 1000 can also be used for stage lighting.

[0238] The term "plurality" means two or more.

[0239] The terms "substantially" or "essentially" and similar terms herein will be understood by those skilled in the art. The terms "substantially" or "essentially" may also include embodiments with "all", "completely", "all", etc. Therefore, in embodiments, the adjectives "substantially" or "essentially" may also be deleted. Where applicable, "substantially" or "essentially" may also relate to 90% or more, such as 95% or more, in particular 99% or more, even more in particular 99.5% or more, including 100%.

[0240] The term "comprising" also includes embodiments wherein the term "comprising" means "consisting of.

[0241] The term "and / or" refers in particular to one or more of the 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" may mean "consisting of" in one embodiment, but may also mean "including at least the defined categories and optionally one or more other categories" in another embodiment.

[0242] In addition, the terms "first", "second", "third", etc. in the description and claims are used to distinguish similar elements and not necessarily to describe a sequential or chronological order. It should be understood that these terms can be interchanged under appropriate circumstances, and the embodiments of the invention described herein are capable of operating in sequences other than those described or illustrated herein.

[0243] The apparatus, device or system during operation is described herein, among other things. It will be clear to those skilled in the art that the present invention is not limited to methods of operation or apparatus, device or system in operation.

[0244] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims.

[0245] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

[0246] Use of the verb "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. Unless the context clearly requires otherwise, throughout the specification and claims, the words "comprises", "comprising", etc. are to be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0247] The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0248] The invention may be implemented by means of hardware comprising a number of distinct elements and by means of a suitably programmed computer. In a device claim, apparatus claim or system claim enumerating a number of means, a number of these means may be implemented by the same hardware. The fact that certain measures are stated in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. In another aspect, the invention (therefore) provides a software product which, when run on a computer, is capable of implementing (one or more embodiments of) the method described herein.

[0249] The present invention also provides a control system that can control the device, apparatus or system, or can perform the method or process described herein. In addition, the present invention also provides a computer program product that, when functionally coupled to the device, apparatus or system or run on a computer included by the device, apparatus or system, controls one or more controllable elements of the device, apparatus or system.

[0250] The present invention also applies to an apparatus, device or system comprising one or more features described in the specification and / or shown in the drawings. The present invention also relates to a method or process comprising one or more features described in the specification and / or shown in the drawings.

[0251] The various aspects discussed in this patent can be combined to provide additional advantages. In addition, those skilled in the art will understand that the embodiments can be combined, and more than two embodiments can also be combined. In addition, some features can form the basis of one or more divisional applications.

Claims

1. A light generating system (1000), comprising one or more light generating devices (100), a first light emitter (210), a second light emitter (220), an optical device (400), a collimator (500), a control system (300) and a heat transfer system (700); wherein: The one or more light generating devices (100) are configured to generate device light (101) having a first wavelength (λ1); wherein the one or more light generating devices (100) comprise one or more solid-state light sources, wherein the one or more solid-state light sources comprise a laser light source; The collimator (500) has a first end (501) and a second end (502), wherein the collimator (500) gradually tapers from the second end (502) to the first end (501); The first luminophore (210) is configured to convert at least a portion of the light having the first wavelength (λ1) into a first luminescent material light (211); The second luminophore (220) is configured to convert at least a portion of the light having the first wavelength (λ1) into a second luminescent material light (221); The first light emitting body (210) and the second light emitting body (220) are arranged in the collimator (500), wherein the first light emitting body (210) is arranged closer to the first end (501) than the second light emitting body (220); The heat transfer system (700) is configured to transfer heat from one or more of the first light emitter (210) and the second light emitter (220); The optical device (400) is configured to direct the device light (101) to the first light emitter (210) and / or the second light emitter (220); The light generating system (1000) is configured to generate a system light (1001) including one or more of the first luminescent material light (211) and the second luminescent material light (221); wherein the system light (1001) has a controllable beam shape; and The control system (300) is configured to control the system light (1001) by controlling the one or more light generating devices (100).

2. The light generating system (1000) according to claim 1, wherein: The one or more light generating devices (100) are configured to generate device light (101) having a controllable polarization; The optical device (400) is configured to direct the device light (101) to the first light emitter (210) and / or the second light emitter (220) according to the polarization of the device light (101); The control system (300) is configured to control the polarization of the device light (101).

3. The light generating system (1000) according to claim 2, wherein the light generating system (1000) comprises: (i) a first light generating device (110) configured to generate a first device light (111) having a first polarization; and (ii) a second light generating device (120) configured to generate a second device light (121) having a second polarization different from the first polarization; wherein the control system (300) is configured to control the first light generating device (110) and the second light generating device (120).

4. The light generating system (1000) according to any one of the preceding claims 2 to 3, wherein the optical device (400) comprises (i) a polarization beam splitter (410) which is arranged in the collimator (500), and (ii) a retarder device (420), wherein: The polarization beam splitter (410) is configured to be in a light receiving relationship with the one or more light generating devices (100); The polarization beam splitter (410) is configured to (i) direct at least a portion of the received device light (101) in the direction of the first light emitter (210) or the second light emitter (220) when the device light (101) has a first polarization, and (ii) direct at least a portion of the received device light (101) to the retarder device (420) when the device light (101) has a second polarization; wherein the other of the first light emitter (210) and the second light emitter (220) is configured to be in a light receiving relationship with the one or more light generating devices (100) via the retarder device (420) and the polarization beam splitter (410).

5. The light generating system (1000) according to claim 4, wherein the delay device (420) comprises (i) a delay device (421), wherein the delay device (421) comprises a quarter wave plate (422), and (ii) a second reflector (430); wherein the delay device (420) is configured outside the collimator (500).

6. The light generating system (1000) according to claim 5, wherein: The one or more light generating devices (100) are arranged outside the collimator (500); wherein the collimator (500) comprises a collimator wall (505), wherein the collimator wall tapers in a direction from the second end (502) to the first end (501); The collimator wall (505) includes a first opening (506) arranged between the one or more light generating devices (100) and the polarizing beam splitter (410); and The collimator wall (505) comprises a second opening (507) arranged between the polarization beam splitter (410) and the retarder device (420).

7. A light generating system (1000) according to any one of the preceding claims 2 to 6, wherein the one or more light generating devices (100), the first light emitter (210) and the second light emitter (220) are selected and configured so that the spectral characteristics selected from the color point and correlated color temperature of the system light (1001) depend on the polarization of the device light (101).

8. A light generating system (1000) according to any one of the preceding claims, wherein the optical device (400) includes a reflector device (440), wherein the one or more light generating devices (100) are configured to illuminate the reflector device (440) from different sides of the reflector device (440), wherein the one or more light generating devices (100) and the reflector device (440) are configured to illuminate the first light emitter (210) and the second light emitter (220), wherein the control system (300) is configured to control which of the light emitters (210, 220) is illuminated by the device light (101).

9. A light generating system (1000) according to any one of the preceding claims, wherein the first light emitter (210) and the collimator (500) are configured so that a first light beam (2111) of the system light (1001) including the first light emitting material light (211) has a first beam angle (β1) defined by a half-width at half maximum of 2°; and wherein the second light emitter (220) and the collimator (500) are configured so that a second light beam (2211) of the system light (1001) including the second light emitting material light (221) has a second beam angle (β2) defined by a half-width at half maximum of 5°.

10. The light generating system (1000) according to any one of the preceding claims, wherein the collimator (500) comprises a hollow first reflector (530) or a total internal reflection collimator.

11. The light generating system (1000) of any one of the preceding claims, wherein the first luminophore (210) comprises a first luminescent material (215), wherein the second luminophore (220) comprises a second luminescent material (216), wherein the first luminescent material (215) and the second luminescent material (216) are different; wherein at least one of the first luminescent material (215) and the second luminescent material (216) comprises A3B5O 12 :Ce type luminescent material, wherein A in the embodiment includes one or more of Y, La, Gd, Tb and Lu, and wherein B in the embodiment includes one or more of Al, Ga, In and Sc.

12. The light generating system (1000) according to any one of the preceding claims, comprising a laser group (1100), wherein the laser group (1100) accommodates the first light generating device (110) and the second light generating device (120), wherein the first light generating device (110) comprises a first laser, and wherein the second light generating device (120) comprises a second laser.

13. A light generating system (1000) according to any of the preceding claims, wherein the system light (1001) has a controllable correlated color temperature, the controllable correlated color temperature comprising a correlated color temperature that differs by at least 1000K depending on the polarization of the device light (101), wherein a first light beam (2111) of the system light (1001) has a correlated color temperature of at least 7000K, and wherein a second light beam (2211) of the system light (1001) has a correlated color temperature of a maximum of 4000K.

14. The light generating system (1000) according to any of the preceding claims, wherein the heat transfer system (700) comprises one or more heat sinks (730), wherein the first light emitter (210) and the second light emitter (220) are configured to be in thermal contact with the one or more heat sinks (730).

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

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