Improved light engine

Abstract

A light engine (100) includes first and second laser devices (10, 11) that emit blue laser light. The first mirror device (12) partially reflects the blue laser light (51) emitted by the second laser device (11) as a first portion of the second blue laser light (53), and the phosphor element (13) receives the blue laser light (50) emitted by the first laser device (10) and receives the first portion of the second blue laser light (53). And converts at least a portion of the blue laser light (50) emitted by the first laser device (10) and a first portion of the second blue laser light (53) into (green yellow and / or red) converted light (55). The (green yellow and / or red) converted light (55) is collimated and combined with a second portion of the second blue laser light (52) emitted by the second laser device (11) that is not reflected by the first mirror device (12) to produce white engine light (58).

Description

Technical Field

[0001] The present disclosure relates to a light engine comprising a laser device, and wherein the light engine is configured to generate white light. Background Art

[0002] In order to provide a visually pleasing view of a live performance, for example, at a venue such as a theater stage or a concert hall, it is often important to illuminate the performance with light having a desired intensity and a desired color temperature (e.g., a color temperature corresponding to white light). So-called light engines or lighting engines are often used for this purpose. Needless to say, large venues require powerful light engines capable of emitting high-intensity light. Such light engines may include laser light sources in the form of so-called laser arrays, which have a plurality of individual laser beam emitters that, by means of various optical components, can generate the desired light, for example, white light, for illuminating the venue in question.

[0003] However, a disadvantage of laser beam light in providing a visually pleasing view of a live performance in a theater or concert venue is that the laser beam light is essentially monochromatic. Although a laser array comprising multiple laser beam emitters can provide very high intensity light, there remains the problem of how to enable a light engine to provide high intensity white light. Summary of the Invention

[0004] In view of the above, an object of the present disclosure is to overcome the disadvantages associated with light engines based on laser groups. This object is achieved in a first aspect by a light engine configured to generate engine light.

[0005] The light engine of the first aspect includes a first laser device configured to emit a first blue laser light and a second laser device configured to emit a second blue laser light. The light engine also includes a first reflector device, such as a dichroic mirror or a metal reflector, that is partially reflective and partially transmissive to the second blue laser light and is configured to split the second blue laser light emitted by the second laser device into a first portion of the second blue laser light and a second portion of the second blue laser light, wherein a ratio (R) of the first portion of the second blue laser light to the second portion of the second blue laser light is in a range of 0.1 to 2. A beam combiner is arranged downstream of the first reflector device and is configured to combine the first portions of the first and second blue laser light and direct the combined first portions of the first and second blue laser light to a phosphor element. The phosphor element is arranged downstream of the beam combiner and is configured to receive the first blue laser light emitted by the first laser device and the first portion of the second blue laser light, and convert the first portions of the first and second blue laser light emitted by the first laser device into converted light (e.g., greenish-yellow and / or red). Furthermore, the light engine is configured to collimate the converted light (e.g., greenish-yellow and / or red) emitted by the phosphor element and combine the collimated converted light (e.g., greenish-yellow and / or red) with a second portion of the second blue laser light emitted by the second laser device to generate engine light. The engine light is white light having a correlated color temperature in the range of 2700K to 10000K, preferably in the range of 5000K to 10000K, and a color rendering index of at least 70, preferably at least 80, more preferably at least 85, and even more preferably at least 88.

[0006] In other words, the blue laser light provided by the first laser device is used together with a portion of the blue laser light provided by the second laser device to pump a phosphor element that provides (e.g., greenish-yellow and / or red) converted engine light, while the remaining blue light provided by the second laser device is used to provide blue engine light. The combination of the (e.g., greenish-yellow and / or red) converted engine light and the blue engine light produces the desired high-intensity white engine light that can provide a visually pleasing view of a live performance in a theater or concert venue or other lighting application.

[0007] In an embodiment, the first mirror arrangement may be configured to partially reflect the second blue laser light emitted by the second laser arrangement into the first portion of the second blue laser light, and to partially transmit the second blue laser light emitted by the second laser arrangement into the second portion of the second blue laser light.

[0008] Alternatively, in an embodiment, the first mirror arrangement may be configured to partially transmit the second blue laser light emitted by the second laser arrangement into the first portion of the second blue laser light, and configured to partially reflect the second blue laser light emitted by the second laser arrangement into the second portion of the second blue laser light.

[0009] In an embodiment, the first laser device may include a first laser group. The first laser group may include, for example, a plurality of individual first laser beam emitters configured to emit a first laser beam. The plurality of individual first laser beam emitters may be arranged in a first laser array. The first laser group may include, for example, a first heat sink for cooling the plurality of individual first laser beam emitters. The first laser group may include a first optical structure, for example, for collimating the first laser beam into a laser beam emitted by the first laser beam emitter.

[0010] In an embodiment, the second laser device may include a second laser group. The second laser group may include, for example, a plurality of individual second laser beam emitters configured to emit a second laser beam. The plurality of individual second laser beam emitters may be arranged in a second laser array. The second laser group may include, for example, a second heat sink for cooling the plurality of individual second laser beam emitters. The second laser group may include a second optical structure, for example, for collimating the second laser beam into a laser beam emitted by the second laser beam emitters.

[0011] In an embodiment, the first blue laser light may have a first polarization, and the second blue laser light may have a second polarization that is different from the first polarization, for example rotated by 90 degrees.

[0012] In an embodiment, the first blue laser may have a first (main and / or centroid) emission peak wavelength (λ1), and the second blue laser may have a second (main and / or centroid) emission peak wavelength (λ2), wherein |λ2-λ1|≤20nm, preferably, |λ2-λ1|≤15nm, more preferably, |λ2-λ1|≤10nm, and most preferably, |λ2-λ1|≤5nm.

[0013] Alternatively, in an embodiment, the first blue laser may have a first (main and / or centroid) emission peak wavelength (λ1), and the second blue laser may have a second (main and / or centroid) emission peak wavelength (λ2), wherein |λ2-λ1|>20nm, preferably |λ2-λ1|≥25nm, more preferably |λ2-λ1|≥30nm, most preferably |λ2-λ1|≥35nm.

[0014] In an embodiment, the beam combiner may include a polarizing reflector configured to (i) transmit the first blue laser light and reflect a first portion of the second blue laser light, or (ii) reflect the first blue laser light and transmit a first portion of the second blue laser light.

[0015] In an embodiment, the beam combiner may include a dichroic reflector configured to (i) transmit the first blue laser light and reflect a first portion of the second blue laser light, or (ii) reflect the first blue laser light and transmit a first portion of the second blue laser light. In a preferred embodiment, the dichroic reflector may also be configured to transmit the first blue laser light, reflect the first portion of the second blue laser light, and reflect the collimated converted light.

[0016] In an embodiment, the light engine may use one or more lenses to collimate the (e.g., green-yellow and / or red) converted light emitted by the phosphor element. One or more lenses may also be used to focus the first portion of the first blue laser light and the second blue laser light onto the phosphor element.

[0017] In another preferred embodiment, another dichroic reflector may be used.The further dichroic reflector may be arranged between the beam combiner and the phosphor element, in particular, the further dichroic reflector may be arranged between the beam combiner and the one or more lenses.

[0018] In embodiments, the light engine may further include a diffuser configured to diffuse the second portion of the second blue laser light. The diffuser may be used in either a transmissive or reflective configuration. When the diffuser is used in a transmissive configuration, a first lens positioned upstream of the diffuser may be used to focus the second portion of the second blue laser light onto the diffuser, and a second lens positioned downstream of the diffuser may be used to collimate the second portion of the second blue laser light transmitted and diffused by the diffuser. In this manner, a diffused second portion of the second blue laser light may be obtained. When the diffuser is used in a reflective configuration, the first lens positioned upstream of the diffuser may be used to focus the second portion of the second blue laser light onto the diffuser. The diffuser may be configured to reflect and diffuse the second blue laser light into the diffused second portion of the second blue laser light.

[0019] In an embodiment, the collimated converted light emitted by the phosphor element can be combined with the (diffuse) second portion of the second blue laser light by using an additional beam combiner. The additional beam combiner can include an additional beam combiner dichroic mirror, for example, which transmits the collimated converted light and reflects the second portion of the second blue laser light, or reflects the collimated converted light and transmits the second portion of the second blue laser light, so as to combine the collimated converted light and the (collimated) (diffuse) second portion of the second blue laser light. Alternatively, the additional beam combiner can include a polarization beam splitter, which is, for example, transmissive for the collimated converted light and reflective for the second portion of the second blue laser light having a first polarization, and transmissive for the second portion of the second blue laser light having a second polarization different from the first polarization (e.g. rotated 90 degrees), or which is reflective for the collimated converted light and reflective for the second portion of the second blue laser light having the first polarization, and transmissive for the second portion of the second blue laser light having a second polarization different from the first polarization (e.g. rotated 90 degrees).

[0020] In embodiments, the beam combiner may include optical components such as dichroic mirrors and / or polarizing reflectors (also known as reflective polarizers) and / or polarizing beam splitters.

[0021] In an embodiment, the phosphor element may be in the form of a phosphor track on a wheel that is rotated by a motor.

[0022] In an embodiment, the diffuser may be in the form of a diffuser track on a (further) wheel rotated by a (further) motor.

[0023] In an embodiment, the engine light may comprise or be the (collimated) converted light and a (collimated) (diffuse) second portion of the second blue laser light.

[0024] In embodiments, a ratio (R) of the first portion of the second blue laser light to the second portion of the second blue laser light may be in a range from 0.1 to 0.8 (which is particularly suitable for general lighting), in a range from 0.8 to 1.5 (which is particularly suitable for stage lighting) and / or in a range from 1.5 to 2 (which is particularly suitable for moving headlights).

[0025] In an embodiment, the light engine may include a diffuser configured to diffuse the second portion of the second blue laser light. The diffuser may be arranged in a transmissive or reflective mode. In the transmissive mode, a first optical device (e.g., a lens) may be arranged upstream of the diffuser to focus the second portion of the second blue laser light onto the diffuser, and a second optical device (e.g., a lens) may be arranged downstream of the diffuser to collimate the (diffused) second portion of the second blue laser light (becoming the collimated second portion of the second blue laser light). In the reflective mode, a third optical device (e.g., a lens) may be arranged upstream of the diffuser to focus the second portion of the second blue laser light onto the diffuser and collimate the (reflected) (diffused) second portion of the second blue laser light (becoming the collimated second portion of the second blue laser light). In the reflective mode, a quarter-wave plate may be arranged upstream of (the third optical device and) the diffuser. A polarizing beam splitter may be arranged upstream of the quarter-wave plate and configured to transmit the (non-diffused) second portion of the second blue laser light and reflect the diffused second portion of the second blue laser light, or vice versa.

[0026] In an embodiment, the light engine may comprise a further beam combiner, such as a further dichroic mirror or a further polarizing beam splitter, configured to combine the (collimated) (green-yellow and / or red) converted light emitted by the phosphor element with the (diffuse) second portion of the second blue laser light.

[0027] In an embodiment, the correlated color temperature of the white engine light can be varied, for example, from a first correlated color temperature to a second correlated color temperature, for example, by at least 500 K or at least 1000 K. The correlated color temperature can be varied using a controller for separately controlling the first blue laser light emitted by the first laser device and the second blue laser light emitted by the second laser device. While varying the correlated color temperature, the first reflector device can remain in a fixed position.

[0028] In some embodiments, the first mirror arrangement is specularly reflective and has a reflectivity of at least 80%, preferably at least 85%, more preferably at least 90% for the second blue laser light emitted by the second laser arrangement.

[0029] In various embodiments, the first mirror arrangement can be configured to adjust the ratio between the first portion of the second blue laser light and the second portion of the second blue laser light. For example, the first mirror arrangement can be configured such that the adjustment of the ratio between the first portion of the second blue laser light and the second portion of the second blue laser light is spatially adjustable.

[0030] That is, various embodiments advantageously provide an effect whereby the ratio between the (greenish-yellow and / or red) converted light and the (diffuse) blue engine light can be varied, thereby achieving different color temperatures. In other words, various embodiments can provide a dynamically adjustable light engine.

[0031] In some embodiments, the second laser arrangement may include a plurality of individual second laser beam emitters, and the first mirror arrangement may include a mirror configured to reflect laser beams emitted by a subset of the second laser beam emitters.

[0032] That is, as a very simple structure, this reflector reflects the laser beams emitted by a subset of the second laser beam emitters, thereby allowing them to reach the phosphor element, while allowing the remaining emitted laser beams, for example, not reflected by the reflector, to continue to combine with the converted light from the phosphor element. By configuring this reflector to be spatially adjustable, an adjustable number of laser beams to be reflected can be obtained, thereby forming an embodiment of a dynamically adjustable light engine.

[0033] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first reflector device may include a plurality of beam reflectors, e.g., circular, oval, or elliptical, configured to reflect the individual laser beams emitted by a subset of the second laser beam emitters. For example, the respective cross-sectional areas of the beam reflectors may be larger than the respective cross-sectional areas of the laser beams reflected by the beam reflectors.

[0034] That is, in such a configuration, each individual reflector reflects the corresponding laser beam emitted by the corresponding second laser beam emitter, thereby allowing it to reach the phosphor element, while allowing, for example, the remaining emitted laser beam not reflected by the corresponding reflector to continue to combine with the converted light from the phosphor element. By configuring multiple such reflectors to be spatially adjustable, an adjustable number of laser beams to be reflected can be obtained, thereby forming an embodiment of a dynamically adjustable light engine.

[0035] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first reflector device may include a plurality of beam reflectors, such as circular, oval, or elliptical, configured to reflect respective portions of the laser beam emitted by at least a subset of the second laser beam emitters. For example, the respective cross-sectional areas of the beam reflectors may be less than 0.25 times the respective cross-sectional areas of the laser beams reflected by the beam reflectors.

[0036] That is, in this configuration, each individual reflector has an area that is smaller than the cross-sectional area of the corresponding laser beam. Each reflector then reflects only a portion of the corresponding laser beam emitted by the corresponding second laser beam emitter, thereby allowing it to reach the phosphor element, while allowing the remaining portion of the emitted laser beam that is not reflected by the corresponding portion of the reflector to continue to combine with the converted light from the phosphor element. By configuring multiple such reflectors to be spatially adjustable, an adjustable number of laser beams to be reflected can be achieved, thereby forming one embodiment of a dynamically adjustable light engine.

[0037] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first reflector device may include a reflector configured with a plurality of beam apertures, such as circular, oval, or elliptical, for passing the individual laser beams emitted by a subset of the second laser beam emitters. For example, the respective cross-sectional areas of the beam apertures may be larger than the respective cross-sectional areas of the laser beams passing through the beam apertures.

[0038] That is, in this configuration, the reflector reflects a subset of the laser beams emitted by the corresponding second laser beam emitters, thereby allowing them to reach the phosphor element, while allowing the remaining emitted laser beams, for example, that passed through the corresponding beam apertures and were therefore not reflected by the reflector, to continue to combine with the converted light from the phosphor element. By configuring the reflector to be adjustable with respect to the number of beam apertures, an adjustable number of laser beams to be reflected can be obtained, thereby constituting one embodiment of a dynamically tunable light engine.

[0039] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first reflector device may include a reflector configured with a plurality of beam apertures, such as circular, oval, or elliptical, for passing corresponding portions of the laser beams emitted by at least a subset of the second laser beam emitters. For example, the corresponding cross-sectional areas of the beam apertures may be less than 0.25 times the corresponding cross-sectional areas of the laser beams passing through the beam apertures.

[0040] That is, in this configuration, the area of each individual beam aperture is smaller than the cross-sectional area of the corresponding laser beam. The reflector then reflects only a portion of the respective laser beam emitted by the corresponding second laser beam emitter, thereby allowing it to reach the phosphor element, while allowing the remaining portion of the emitted laser beam that passes through the respective beam aperture to continue combining with the converted light from the phosphor element. By configuring the reflector and beam aperture to be spatially adjustable, an adjustable portion of the laser beam to be reflected can be achieved, thereby constituting one embodiment of a dynamically adjustable light engine.

[0041] As described above, the first reflector arrangement can advantageously be configured in various ways, wherein a desired ratio between the first portion of blue light and the second portion of blue light can be obtained. Furthermore, by varying the number of beam reflectors or beam apertures, or varying the spatial extent of the beam reflectors or beam apertures, a dynamic adjustment of the ratio between the first portion of blue light and the second portion of blue light can be obtained.

[0042] In another aspect, a luminaire is provided, comprising a light engine as outlined above and a controller for controlling first and second laser devices. Such a luminaire and embodiments of such a luminaire provide the corresponding effects and advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1a is a block diagram schematically illustrating a light engine,

[0044] Figure 1b is a block diagram schematically illustrating a luminaire including a light engine,

[0045] Figure 2 is a plan view schematically showing a laser device used in a light engine,

[0046] Figures 3 to 7 is a plan view schematically illustrating a corresponding reflector arrangement for a light engine, and

[0047] Figures 8 to 14 is a block diagram schematically illustrating embodiments of various light engines. DETAILED DESCRIPTION

[0048] Figure 1aA light engine 100 configured to generate engine light 58 is shown. The light engine 100 includes a first laser device 10 configured to emit a first blue laser light 50 and a second laser device 11 configured to emit a second blue laser light 51. A first mirror device 12 is partially reflective and partially transmissive to the second blue laser light 51 and is configured to split the second blue laser light 51 emitted by the second laser device 11 into a first portion of the second blue laser light 53 and a second portion of the second blue laser light 52, wherein a ratio (R) of the first portion of the second blue laser light 53 to the second portion of the second blue laser light 52 is in the range of 0.1 to 2. Beam combiners 68, 76 are arranged downstream of the first mirror device and are configured to combine the first portions of the first blue laser light 50 and the second blue laser light 53 and direct the combined first portions of the first blue laser light 50 and the second blue laser light 53 to a phosphor element 13. The phosphor element 13 is arranged downstream of the beam combiner and is configured to receive the first blue laser light 50 emitted by the first laser device 10 and the first portion of the second blue laser light 53. The phosphor element 13 converts a first portion of the first blue laser light 50 and the second blue laser light 53 emitted by the first laser device 10 into (e.g., greenish-yellow and / or red) converted light 55. The light engine 100 is further configured to collimate the (e.g., greenish-yellow) converted light 55 emitted by the phosphor element 13 and combine the collimated (e.g., greenish-yellow and / or red) converted light with a second portion of the second blue laser light 52 emitted by the second laser device 11 to produce engine light 58. The engine light 58 is white light having a correlated color temperature in the range of 2700K to 8000K, preferably in the range of 5000K to 10000K, and a color rendering index of at least 70, preferably at least 80, more preferably at least 85, and even more preferably at least 88.

[0049] The first reflector device 12 may be of a specular type having a reflectivity of at least 80%, preferably at least 85%, more preferably at least 90% for the second blue laser light 51 emitted by the second laser device 11. Furthermore, the first reflector device 12 may be dichroic or metallic.

[0050] Furthermore, the first mirror arrangement 12 may be configured to adjust the ratio between the first portion of the second blue laser light 53 and the second portion of the second blue laser light 52. For example, the first mirror arrangement 12 may be configured such that the adjustment of the ratio between the first portion of the second blue laser light 53 and the second portion of the second blue laser light 52 is spatially adjustable.

[0051] In various embodiments, the first mirror arrangement 12 can be configured such that the ratio between the first portion of the second blue laser light 53 and the second portion of the second blue laser light 52 is spatially adjustable, achieved by translational or rotational movement. For example, the distance between the second laser arrangement 11 and the first mirror arrangement 12 can be varied, for example, by using an (electric) motor. For example, the rotation angle of the first mirror arrangement 12 relative to the second laser arrangement 11 can be varied, for example, by using an (electric) motor.

[0052] As the following combination Figures 8 to 14 As illustrated, the light engine 100 may further include diffusers 65, 78 configured to diffuse a second portion of the second blue laser light 52. Furthermore, in various embodiments, the first and / or second laser devices 10, 11 may include laser device optics, such as one or more lenses or lens arrays.

[0053] Regarding the blue laser light emitted by the laser devices 10 and 11, in various embodiments, the first blue laser light 50 can have a first main peak wavelength within the wavelength range of 430 nm to 490 nm, preferably 440 nm to 470 nm. In various embodiments, the second blue laser light 51 can have a second main peak wavelength within the wavelength range of 430 nm to 490 nm, preferably 440 nm to 470 nm, and in various embodiments, the first and second main peak wavelengths can be substantially the same. Regarding the (greenish-yellow and / or red) converted light 55, in various embodiments, it can have a main conversion peak wavelength within the wavelength range of 495 nm to 590 nm, preferably 520 nm to 570 nm.

[0054] Figure 1b is a block diagram schematically illustrating a luminaire 101 comprising a light engine 100, such as the light engine 100 illustrated here. The luminaire 101 comprises a controller 103 for controlling the first and second laser devices 10, 11 jointly or individually.

[0055] Now refer to Figures 2 to 7 And continue to refer to Figure 1a Embodiments involving the configuration of the first mirror device 12 capable of adjusting the ratio between the first portion of the second blue laser light 53 and the second portion of the second blue laser light 52 will be described. Common to these embodiments is the configuration of the second laser device 11, which includes a plurality of individual second laser beam emitters 22. Figure 2 These second laser beam emitters 22 are shown schematically, as seen from the front, and are arranged in a rectangular matrix configuration.Such a matrix configuration is not required, and as will be appreciated by those skilled in the art, any non-rectangular matrix configuration may be used.

[0056] like Figure 3 As shown, the first reflector arrangement 12 may include a reflector 31 configured to reflect the laser beams emitted by the subset of the second laser beam emitters 22. Figure 3 As shown, the reflector 31 can be simply a rectangular reflective plane. Depending on factors related to how the reflector assembly 12 is mounted in the light engine 100, a transparent portion 32 may be required, although these details are outside the scope of this disclosure. In any case, the reflector assembly 12 is mounted in the light engine 100 so that a desired number of the laser beams emitted by the second laser beam emitter 22 are reflected by the reflector 31 and ultimately reach the phosphor element 13, while the remaining number of laser beams emitted by the second laser beam emitter 22 pass through the reflector 31 and continue to combine with the converted light 55 from the phosphor element 13, as described herein.

[0057] like Figure 4 As shown, the first reflector arrangement 12 may include a plurality of beam reflectors 24 configured to reflect the respective laser beams emitted by the subset of the second laser beam emitters 22. Figure 4 As shown, the beam reflector 24 can be configured to Figure 2 The arrangement of the second laser beam emitters 22 shown corresponds to a matrix arrangement, and the number of beam reflecting mirrors 24 determines how much of the laser beam emitted by the second laser beam emitters 22 is reflected and finally reaches the phosphor element 13. Figure 4 As shown, the reflector arrangement 12 may include a frame structure 23 having a beam aperture 25, through which the laser beam emitted by the second laser beam emitter 22 and not reflected by the beam reflector 24 passes and continues to be combined with the converted light 55 from the phosphor element 13 as described herein. The corresponding cross-sectional area of the beam reflector 24 may be larger than the corresponding cross-sectional area of the laser beam reflected by the beam reflector 24. For a circular geometry, this corresponds to a relationship in which the corresponding diameter of the beam reflector 24 is larger than the corresponding diameter of the laser beam reflected by the beam reflector 24.

[0058] like Figure 5 As shown, the first reflector arrangement 12 may include a plurality of beam reflectors 27 configured to reflect respective portions of the laser beams emitted by at least a subset of the second laser beam emitters 22. Figure 5 As shown, the beam reflector 27 can be configured to Figure 2 The arrangement of the second laser beam emitters 22 shown is arranged in a corresponding matrix manner, and the size of the beam reflectors 27 determines how much of the respective laser beams emitted by the second laser beam emitters 22 are reflected and ultimately reach the phosphor element 13. Figure 5As shown, the reflector arrangement 12 may include a frame structure 23 having a beam aperture 26 through which a portion of the laser beam emitted by the second laser beam emitter 22 and not reflected by the beam reflector 27 passes and continues to be combined with the converted light 55 from the phosphor element 13 as described herein. Figure 5 The embodiment can be used with Figure 4 By combining the embodiments illustrated in , an embodiment is obtained in which the number of beam reflecting mirrors 27 is also selected to provide a desired ratio between the first portion of the second blue laser light 53 and the second portion of the second blue laser light 52. Figure 4 The structure shown, Figure 5 The corresponding cross-sectional area of the beam reflecting mirror 27 in the embodiment may be smaller than 0.25 times, preferably 0.16 times, more preferably 0.09 times, the corresponding cross-sectional area of the laser beam reflected by the beam reflecting mirror 27. For a circular geometry, this corresponds to a relationship in which the corresponding diameter of the beam reflecting mirror 27 is smaller than 0.5 times, preferably 0.4 times, more preferably 0.3 times, the corresponding diameter of the laser beam reflected by the beam reflecting mirror 27.

[0059] like Figure 6 As shown, the first reflector device 12 may include a reflector 28 configured with a plurality of beam holes 29 for passing the respective laser beams emitted by the subset of the second laser beam emitters 22. Figure 6 As shown, the beam hole 29 can be configured to Figure 2 The arrangement of the second laser beam emitters 22 shown corresponds to a matrix arrangement, wherein the number of beam apertures 29 determines how much of the laser beam emitted by the second laser beam emitters 22 passes through the beam apertures 29 and continues and combines with the converted light 55 from the phosphor element 13 as described herein, while the remaining laser beam emitted by the second laser beam emitters 22 is reflected by the mirror 28 and ultimately reaches the phosphor element 13. The respective cross-sectional areas of the beam apertures 29 can be larger than the respective cross-sectional areas of the laser beams passing through the beam apertures 29. For a circular geometry, this corresponds to a relationship in which the respective diameters of the beam apertures 29 are larger than the respective diameters of the laser beams passing through the beam apertures 29.

[0060] like Figure 7 As shown, the first reflector arrangement 12 may include a reflector 28 configured with a plurality of beam apertures 30 for passing respective portions of the laser beam emitted by at least a subset of the second laser beam emitters 22. Figure 7 As shown, the beam hole 30 can be configured to Figure 2The arrangement of the second laser beam emitters 22 shown corresponds to a matrix arrangement, and wherein the size of the beam aperture 30 determines how much of the laser beam emitted by the second laser beam emitter 22 passes through the beam aperture 30 and continues to combine with the converted light 55 from the phosphor element 13 as described herein, while the remaining portion of the laser beam emitted by the second laser beam emitter 22 is reflected by the reflector 28 and ultimately reaches the phosphor element 13. Figure 7 The embodiment can be used with Figure 6 By combining the embodiments illustrated in , an embodiment is obtained in which the number of beam holes 30 is also selected to provide a desired ratio between the first portion of the second blue laser light 53 and the second portion of the second blue laser light 52. Figure 6 The configuration shown in , Figure 7 The corresponding cross-sectional area of the beam hole 30 in the embodiment of the present invention may be smaller than 0.25 times, preferably 0.16 times, more preferably 0.09 times, the corresponding cross-sectional area of the laser beam passing through the beam hole 30. For a circular geometry, this corresponds to a relationship in which the corresponding diameter of the beam hole 30 is smaller than 0.5 times, preferably 0.4 times, more preferably 0.3 times, the corresponding diameter of the laser beam passing through the beam hole 30.

[0061] like Figure 4 、 Figure 5 and Figure 7 As shown in the embodiment shown, the beam reflectors 24, 27 and the beam aperture 30 may have a circular shape. Figure 6 As shown, in some embodiments, the shape of the beam hole 29 (and the beam reflector, although not shown) can have an oval or elliptical shape. Note that the first reflector device 12 is generally arranged so that its plane is not perpendicular to the beam direction of the second blue laser 51, and note that the second blue laser 51 is generally a beam with a circular cross-section perpendicular to the beam direction. The elliptical beam reflector and the beam hole advantageously correspond to each other.

[0062] The various configurations of the first reflector device 12 illustrated above can be implemented in various ways, including but not limited to the following: the reflective metal plate or layer can be perforated to create holes. The reflective layer can be applied to a transparent substrate and then patterned. The reflective pattern can be provided on the transparent substrate, for example, by using evaporation and using a mask, such as a mask with holes or dots. The reflector can include aluminum and / or silver. In addition, stacks of layers with different thicknesses and / or refractive indices can be used.

[0063] Now turn Figure 8 and Figure 9 , other embodiments of the light engine will be described in more detail, focusing on how the laser beams emitted by the laser devices 10 , 11 pass through the various optical components in the light engine 100 and produce the desired output of white light 58 .

[0064] Figure 8 One embodiment of a light engine 100 is shown in which a first laser device 10 in the form of a blue laser array emits a linearly polarized first blue laser light, which, after passing through a beam homogenizer 61, provides a homogenized linearly polarized first blue laser light 50. The first blue laser light 50 then passes through an optical component 68 that acts as a polarizing beam splitter for the first blue laser light 50. The first blue laser light 50 is then focused by lenses 69, 70 onto a phosphor element 13 that includes a motor 114 that rotates a wheel 113 that includes a yellow phosphor track that produces (greenish-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (greenish-yellow and / or red) converted light 55 is totally reflected by the optical component 68 for subsequent combining, as described below.

[0065] It should be noted that the optical component 68 can be a single component that performs polarization splitting of the first blue laser light 50 and total reflection of the (green-yellow and / or red) converted light 55. However, the optical component 68 can also be in the form of a two-component dichroic reflector for yellow light and a polarization beam splitter for blue light. Furthermore, the phosphor element 13 can alternatively also be in the form of a phosphor sheet structure arranged on a heat sink.

[0066] The second laser device 11 , also in the form of a blue laser group, emits linearly polarized second blue laser light which, after passing through the beam homogenizer 62 , provides homogenized linearly polarized second blue laser light 51 .

[0067] The second blue laser light 51 falls on the first mirror arrangement 12 and is partially reflected by the polarizing reflector 76, as described above, into a first portion of the second blue laser light 53. In this embodiment, the first mirror arrangement 12 is a semi-reflecting dichroic mirror, which means that the first portion of the second blue laser light 53 is in the form of linearly polarized blue laser light whose polarization direction is rotated by 90 degrees relative to the polarization direction of the blue laser light 50 provided by the first laser arrangement 10, as described above.

[0068] A first portion of the second blue laser light 53 is reflected by the optical component 68, thereby combining with the first blue laser light 50, and both of them are focused onto the phosphor element 13 by lenses 69, 70 and become converted (green-yellow and / or red) light 55. The converted (green-yellow and / or red) light 55 is then totally reflected by the optical component 68 as described above, and is transmitted through the first mirror arrangement 12 (remember, it is a dichroic mirror), and is transmitted through a polarizing beam splitter (or mirror) for blue light 64 arranged parallel to the first mirror arrangement 12.

[0069] Then, a second portion of the second blue laser light 52 is focused onto the diffuser 65 by the lens 66, and the second portion of the second blue laser light 52 is not reflected by the mirror arrangement 12 and is transmitted through the polarization beam splitter for blue light 64. Then, the reflected diffused blue light is collimated by the lens 66 and partially reflected by the polarization beam splitter 64 for blue light and the first mirror arrangement 12.

[0070] The reflected blue light 71 is then combined with the converted (green-yellow and / or red) light 55, and after passing through the homogenizer 63, it exits the light engine 100 as engine light 58 having the desired color temperature. Additional optical components can then be applied to the engine light 58 to project it as desired.

[0071] Figure 9 One embodiment of a light engine 100 is shown, in which a first laser device 10, in the form of a blue laser array, emits linearly polarized first blue laser light, which, after passing through a beam homogenizer 61, becomes homogenized linearly polarized first blue laser light 50. The first blue laser light 50 then passes through an optical component 68, which acts as a polarization beam splitter for the first blue laser light 50. The first blue laser light 50 is then focused by lenses 69, 70 onto a phosphor element 13, which includes a motor 114 that rotates a wheel 113 comprising a yellow phosphor track that produces (greenish-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (greenish-yellow and / or red) converted light 55 is totally reflected by the optical component 68 for subsequent combination, as described below. It should be noted that the optical component 68 can be a single component that performs both polarization splitting of the first blue laser light 50 and total reflection of the (greenish-yellow and / or red) converted light 55. However, the optical component 68 may also be in the form of a two-component dichroic reflector for yellow light and a polarizing beam splitter for blue light.

[0072] The second laser device 11 , also in the form of a blue laser group, emits linearly polarized second blue laser light which, after passing through the beam homogenizer 62 , provides homogenized linearly polarized second blue laser light 51 .

[0073] The second blue laser light 51 falls on the first mirror arrangement 12 and is partially reflected by the polarizing reflector 76 as described above into a first portion of the second blue laser light 53. In this embodiment, the first mirror arrangement 12 is a semi-reflecting dichroic mirror, which means that the first portion of the second blue laser light 53 is in the form of linearly polarized blue laser light whose polarization direction is rotated by 90 degrees relative to the polarization direction of the first blue laser light 50 generated by the first laser arrangement 10 as described above.

[0074] A first portion of the second blue laser light 53 is reflected by the optical component 68, thereby combining with the first blue light 50, and both are focused by lenses 69, 70 onto the phosphor element 13 and become converted (greenish-yellow and / or red) light 55. The converted (greenish-yellow and / or red) light 55 is then totally reflected by the optical component 68 as described above, and is transmitted through the first mirror arrangement 12 (remember, it is a dichroic mirror), and through the polarization beam splitter for blue light 64 arranged parallel to the first mirror arrangement 12.

[0075] The second portion of the second blue laser light 52 that is not reflected by the mirror device 12 is linearly polarized when transmitted through the polarization beam splitter 64 for blue light and becomes circularly polarized light 75 after passing through the quarter-λ plate 67. The circularly polarized light 75 is then focused onto the polarization-maintaining reflective diffuser 73. The reflected diffused blue light is collimated by the lens 66 into collimated blue light 72 and becomes linearly polarized blue light 74 after passing through the quarter-λ plate 67. The polarization direction of the linearly polarized blue light 74 is rotated 90 degrees relative to the polarization direction of the linearly polarized light 52, so it is totally reflected by the polarization beam splitter for the blue light 64.

[0076] The reflected blue light 74 is then combined with the converted (green-yellow and / or red) light 55, and after passing through the homogenizer 63, it exits the light engine 100 as engine light 58 having the desired color temperature. Additional optical components can then be applied to the engine light 58 to project it as desired.

[0077] Figure 10 One embodiment of a light engine 100 is shown in which a first laser device 10 in the form of a blue laser array emits a linearly polarized first blue laser light, which, after passing through a beam homogenizer 61, provides a homogenized linearly polarized first blue laser light 50. The first blue laser light 50 then passes through an optical component 68 that acts as a polarization beam splitter for the first blue laser light 50. The first blue laser light 50 is then focused by lenses 69, 70 onto a phosphor element 13 in the form of a phosphor sheet structure 115 arranged on a heat sink 116, which generates (greenish-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The converted (greenish-yellow and / or red) light 55 is totally reflected by the optical component 68 for subsequent combination, as described below.

[0078] It should be noted that the optical component 68 can be a single component that performs polarization splitting of the first blue laser light 50 and total reflection of the (green-yellow and / or red) converted light 55. However, the optical component 68 can also be in the form of a two-component dichroic reflector for yellow light and a polarization beam splitter for blue light. Furthermore, the phosphor element 13 can alternatively be in the form of a yellow phosphor track on a wheel rotated by a motor, as illustrated in other embodiments herein.

[0079] The second laser device 11 , also in the form of a blue laser group, emits linearly polarized second blue laser light which, after passing through the beam homogenizer 62 , provides homogenized linearly polarized second blue laser light 51 .

[0080] The second blue laser light 51 falls on the first mirror arrangement 12 and is partially reflected by the polarizing reflector 76 as described above into a first portion of the second blue laser light 53. In this embodiment, the first mirror arrangement 12 is a semi-reflecting dichroic mirror, which means that the first portion of the second blue laser light 53 is in the form of linearly polarized blue laser light whose polarization direction is rotated by 90 degrees relative to the polarization direction of the first blue laser light 50 generated by the first laser arrangement 10 as described above.

[0081] A first portion of the second blue laser light 53 is reflected by the optical component 68, thereby combining with the first blue laser light 50, and both are focused by lenses 69, 70 onto the phosphor element 13 and become converted (green-yellow and / or red) light 55. The converted (green-yellow and / or red) light 55 is then totally reflected by the optical component 68, as described above, and transmitted through the first mirror arrangement 12 (remember, it is a dichroic mirror).

[0082] The second portion of the second blue laser light 52 that is not reflected by the mirror arrangement 12 is then focused onto the diffuser 78 via the reflector 77 and the lens 91. The diffused blue light is then collected by the lens 92, becoming collimated blue light 71, which is reflected via the reflector 77 and the dichroic reflector 93 for blue light to be combined with the converted (green-yellow and / or red) light 55, and after passing through the homogenizer 63, it is emitted from the light engine 100 in the form of engine light 58 having the desired color temperature. Additional optical components can then be applied to the engine light 58 to project it as desired.

[0083] Figure 11One embodiment of a light engine 100 is shown in which a first laser device 10 in the form of a blue laser array emits linearly polarized first blue laser light, which, after passing through a beam homogenizer 61, provides homogenized linearly polarized first blue laser light 50. The first blue laser light 50 then passes through an optical component 68, which acts as a polarizing beam splitter for the first blue laser light 50. The first blue laser light 50 is then focused by lenses 69, 70 onto a phosphor element 13 in the form of a phosphor sheet structure 115 arranged on a heat sink 116, which generates (greenish-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (greenish-yellow and / or red) converted light 55 is totally reflected by the optical component 68 for subsequent combination, as described below.

[0084] It should be noted that the optical component 68 can be a single component that performs polarization splitting of the first blue laser light 50 and total reflection of the (green-yellow and / or red) converted light 55. However, the optical component 68 can also be in the form of a two-component dichroic reflector for yellow light and a polarization beam splitter for blue light. Furthermore, the phosphor element 13 can alternatively be in the form of a yellow phosphor track on a wheel rotated by a motor, as illustrated in other embodiments herein.

[0085] The second laser device 11 , also in the form of a blue laser group, emits linearly polarized second blue laser light which is split by the mirror device 12 into first and second blue laser beams 80 and 81 .

[0086] The first blue laser beam 80 corresponds to the above combination Figures 8 to 10 The first portion of the second blue laser beam 53 shown in the example, the second blue laser beam 81 corresponds to the above combination Figures 8 to 10 A second portion of the second blue laser light 52 is illustrated.

[0087] The second blue laser beam 81 is homogenized by the beam homogenizer 62. The first blue laser beam 80 is reflected by the reflector 79 and by the polarization beam splitter 76 for blue light, thereby being combined with the blue light 50, and both are focused by the lenses 69, 70 onto the phosphor element 13 and become the converted (green-yellow and / or red) light 55. The converted (green-yellow and / or red) light 55 is then totally reflected by the optical component 68 for subsequent combination.

[0088] The second blue laser beam 81, which is not reflected by the reflector device 12, passes through the polarization beam splitter 82 and the quarter-λ plate 67 and passes through the lens 66, where it becomes circularly polarized light (left-handed). After being reflected by the polarization-maintaining reflector 65, it becomes reversely polarized (e.g., right-handed). After passing through the quarter-λ plate 67 again, the polarization becomes a blue laser beam 83 rotated by 90 degrees (e.g., s-polarized). It is reflected by the polarization beam splitter 82 and passes through the polarization beam splitter 76 and the optical component 68. It is combined with the converted (green-yellow and / or red) light 55 and, after passing through the homogenizer 63, is emitted from the light engine 100 in the form of engine light 58 having a desired color temperature. Additional optical components can then be applied to the engine light 58 to project it as desired.

[0089] Figure 12 One embodiment of a light engine 100 is shown in which a first laser device 10 in the form of a blue laser array emits a linearly polarized first blue laser light, which, after passing through a beam homogenizer 61, provides a homogenized linearly polarized first blue laser light 50. The first blue laser light 50 then passes through a polarizing beam splitter 76 for blue light and an optical component 68. The first blue laser light 50 is then focused by lenses 69, 70 onto a phosphor element 13 in the form of a phosphor sheet structure 115 arranged on a heat sink 116, which generates (greenish-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (greenish-yellow and / or red) converted light 55 is totally reflected by the optical component 68 for subsequent combination, as described below.

[0090] It should be noted that the optical component 68 can be a single component that performs polarization splitting of the first blue laser light 50 and total reflection of the (green-yellow and / or red) converted light 55. However, the optical component 68 can also be in the form of a two-component dichroic reflector for yellow light and a polarization beam splitter for blue light. Furthermore, the phosphor element 13 can alternatively be in the form of a yellow phosphor track on a wheel rotated by a motor, as illustrated in other embodiments herein.

[0091] The second laser device 11 , also in the form of a blue laser group, emits a linearly polarized second blue laser light, which is split by the mirror device 12 into a first and a second blue laser beam 80 and 81 .

[0092] The first blue laser beam 80 corresponds to the above combination Figures 8 to 10 The first portion of the second blue laser beam 53 shown in the example, the second blue laser beam 81 corresponds to the above combination Figures 8 to 10 A second portion of the second blue laser light 52 is illustrated.

[0093] The second blue laser beam 81 is homogenized via the beam homogenizer 62. The first blue laser beam 80 is reflected via the reflector 79, the polarization beam splitter 84 and reflector 85 for blue light, and via the polarization beam splitter 76 for blue light, thereby combining with the blue light 50, and both are focused onto the phosphor element 13 via the lenses 69, 70 and become the converted (green-yellow and / or red) light 55. The converted (green-yellow and / or red) light 55 is then totally reflected by the optical component 68 for subsequent combination.

[0094] The second blue laser beam 81, which is not reflected by the reflector device 12, passes through the polarization beam splitter 82 and the quarter-λ plate 67 and passes through the lens 66, where it becomes circularly polarized light (left-handed), and after being reflected by the polarization-maintaining reflector 65, it becomes reversely polarized (for example, right-handed). After passing through the quarter-λ plate 67 again, the polarization becomes a blue laser beam 83 rotated by 90 degrees (for example, s-polarization), which is reflected by the polarization beam splitter 82 and passes through the polarization beam splitter 84 and the optical component 68, and is combined with the converted (green-yellow and / or red) light 55. After passing through the homogenizer 63, it is emitted from the light engine 100 in the form of engine light 58 having a desired color temperature. Then, additional optical components can be applied to the engine light 58 to project it as needed.

[0095] Figure 13 One embodiment of a light engine 100 is shown in which a first laser device 10 in the form of a blue laser array emits a linearly polarized first blue laser light, which, after passing through a beam homogenizer 61, provides a homogenized linearly polarized first blue laser light 50. The first blue laser light 50 then passes through a polarizing beam splitter for blue light 76 and an optical component 68. The first blue laser light 50 is then focused by lenses 69, 70 onto a phosphor element 13 in the form of a phosphor sheet structure 115 arranged on a heat sink 116, which generates (greenish-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (greenish-yellow and / or red) converted light 55 is totally reflected by the optical component 68 for subsequent combination, as described below.

[0096] It should be noted that the optical component 68 can be a single component that performs polarization splitting of the first blue laser light 50 and total reflection of the (green-yellow and / or red) converted light 55. However, the optical component 68 can also be in the form of a two-component dichroic reflector for yellow light and a polarization beam splitter for blue light. Furthermore, the phosphor element 13 can also be in the form of a yellow phosphor track on a wheel rotated by a motor, as illustrated in other embodiments herein.

[0097] The second laser device 11 , also in the form of a blue laser group, emits a linearly polarized second blue laser light, which is split by the mirror device 12 into a first and a second blue laser beam 80 and 81 .

[0098] The first blue laser beam 80 corresponds to the above combination Figures 8 to 10 The first part of the second blue laser 53 is shown, and the second blue laser beam 81 corresponds to the above combination Figures 8 to 10 A second portion of the second blue laser light 52 is illustrated.

[0099] Second blue laser beam 81 is homogenized via beam homogenizer 62. First blue laser beam 80 is reflected via reflector 79 and a polarization beam splitter for blue light 76, thereby being combined with first blue laser light 50, and both are focused onto phosphor element 13 via lenses 69, 70 and become converted (greenish-yellow and / or red) light 55. Converted (greenish-yellow and / or red) light 55 is then totally reflected by optical component 68 for subsequent combination.

[0100] The second blue laser beam 81, which is not reflected by the mirror device 12, passes through the polarization beam splitter 82 and the quarter-λ plate 67 and passes through the lens 66, where it becomes circularly polarized light (left-handed), and after being reflected by the polarization-maintaining reflector 65, it becomes reversely polarized (e.g., right-handed). After passing through the quarter-λ plate 67 again, the polarization becomes a blue laser beam 83 rotated by 90 degrees (e.g., s-polarized), which is reflected by the polarization beam splitter 82 and passes through the optical component 68 and is combined with the converted (green-yellow and / or red) light 55. After passing through the homogenizer 63, it is emitted from the light engine 100 in the form of engine light 58 having a desired color temperature. Then, additional optical components can be applied to the engine light 58 to perform projection as required.

[0101] Figure 14 One embodiment of a light engine 100 is shown in which a first laser device 10 in the form of a blue laser array emits a linearly polarized first blue laser light, which, after passing through a beam homogenizer 61, provides a homogenized linearly polarized first blue laser light 50. The first blue laser light 50 then passes through a polarizing beam splitter for blue light 76 and an optical component 68. The first blue laser light 50 is then focused by lenses 69, 70 onto a phosphor element 13 in the form of a phosphor sheet structure 115 arranged on a heat sink 116, which generates (greenish-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (greenish-yellow and / or red) converted light 55 is totally reflected by the optical component 68 for subsequent combination, as described below.

[0102] It should be noted that the optical component 68 can be a single component that performs polarization splitting of the first blue laser light 50 and total reflection of the (green-yellow and / or red) converted light 55. However, the optical component 68 can also be in the form of a two-component dichroic reflector for yellow light and a polarization beam splitter for blue light. Furthermore, the phosphor element 13 can alternatively be in the form of a yellow phosphor track on a wheel rotated by a motor, as illustrated in other embodiments herein.

[0103] The second laser device 11 , also in the form of a blue laser group, emits a linearly polarized second blue laser light, which is split by the mirror device 12 into a first and a second blue laser beam 80 and 81 .

[0104] The first blue laser beam 80 corresponds to the above combination Figures 8 to 10 The first portion of the second blue laser beam 53 shown in the example, the second blue laser beam 81 corresponds to the above combination Figures 8 to 10 A second portion of the second blue laser light 52 is illustrated.

[0105] Second blue laser beam 81 is homogenized via beam homogenizer 62. First blue laser beam 80 is reflected via reflector 79 and a polarization beam splitter for blue light 76, thereby becoming combined with first blue laser light 50, and both are focused onto phosphor element 13 via lenses 69, 70, and become converted (green-yellow and / or red) light 55. Converted (green-yellow and / or red) light 55 is then totally reflected by optical component 68 for subsequent combination.

[0106] The second blue laser beam 81 that is not reflected by the mirror arrangement 12 passes through the beam homogenizer 62 and is focused onto the diffuser 78 via the reflector 87 and the lens 91. The diffused blue light is then collected by the lens 92, becomes collimated blue light 88, passes through the optical component 68, and is combined with the converted (green-yellow and / or red) light 55, and after passing through the homogenizer 63, it is emitted from the light engine 100 in the form of engine light 58 having the desired color temperature. Additional optical components can then be applied to the engine light 58 to project it as desired.

[0107] Those skilled in the art realize that the present invention is by no means limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims.

Claims

1. A light engine (100) configured to generate engine light (58) and comprising: a first laser device (10) configured to emit a first blue laser (50); a second laser device (11) configured to emit a second blue laser (51); a first mirror arrangement (12) that is partially reflective of the second blue laser light and partially transmissive of the second blue laser light and is configured to split the second blue laser light emitted by the second laser arrangement (11) into a first portion (53) of the second blue laser light and a second portion (52) of the second blue laser light, wherein a ratio (R) of the first portion of the second blue laser light to the second portion of the second blue laser light is in the range of 0.1 to 2; a beam combiner (68, 76) arranged downstream of the first mirror arrangement and configured to combine the first portion of the first blue laser light (50) and the second blue laser light (53) and to direct the combination of the first portion of the first blue laser light (50) and the second blue laser light (53) to the phosphor element (13); The phosphor element (13) is arranged downstream of the beam combiner and is configured to receive the first blue laser light (50) emitted by the first laser device (10) and receive a first portion of the second blue laser light (53), and convert the first blue laser light (50) and the first portion of the second blue laser light (53) emitted by the first laser device (10) into converted light (55), and wherein: The light engine (100) is configured to collimate the converted light (55) emitted by the phosphor element (13) and to combine the collimated converted light with a second portion of the second blue laser light (52) emitted by the second laser device (11) to generate the engine light (58); and wherein the engine light (58) is white light having a correlated color temperature in the range of 2700K to 10000K, preferably in the range of 5000K to 10000K and a color rendering index of at least 70, preferably at least 80, more preferably at least 85, most preferably at least 88.

2. The light engine (100) according to claim 1, wherein the first reflector device (12) is specularly reflective and has a reflectivity of at least 80%, preferably at least 85%, and more preferably at least 90% for the second blue laser light (51) emitted by the second laser device (11).

3. The light engine (100) according to claim 1 or 2, wherein the first reflector arrangement (12) is configured to adjust a ratio between a first portion of the second blue laser light (53) and a second portion of the second blue laser light (52).

4. The light engine (100) of claim 3, wherein the first reflector arrangement (12) is configured such that the adjustment of the ratio between the first portion of the second blue laser light (53) and the second portion of the second blue laser light (52) is spatially adjustable.

5. The light engine (100) according to any one of claims 3 to 4, wherein the second laser arrangement (11) comprises a plurality of individual second laser beam emitters (22), and wherein the first reflector arrangement (12) comprises a reflector (31) configured to reflect laser beams emitted by a subset of the second laser beam emitters (22).

6. The light engine (100) according to any one of claims 3 to 4, wherein the second laser arrangement (11) comprises a plurality of individual second laser beam emitters (22), and wherein the first reflector arrangement (12) comprises a plurality of beam reflectors (24) configured to reflect respective laser beams emitted by a subset of the second laser beam emitters (22).

7. The light engine (100) of claim 6, wherein a corresponding cross-sectional area of the beam reflector (24) is larger than a corresponding cross-sectional area of the laser beam reflected by the beam reflector (24).

8. The light engine (100) according to any one of claims 3 to 4, wherein the second laser arrangement (11) comprises a plurality of individual second laser beam emitters (22), and wherein the first reflector arrangement (12) comprises a plurality of beam reflectors (27) configured to reflect respective portions of the laser beams emitted by at least a subset of the second laser beam emitters (22).

9. The light engine (100) of claim 8, wherein a corresponding cross-sectional area of the beam reflector (27) is less than 0.25 times a corresponding cross-sectional area of the laser beam reflected by the beam reflector (27).

10. The light engine (100) according to any one of claims 3 to 4, wherein the second laser arrangement (11) comprises a plurality of individual second laser beam emitters (22), and wherein the first reflector arrangement (12) comprises a reflector (28) configured with a plurality of beam apertures (29) for passing respective laser beams emitted by a subset of the second laser beam emitters (22).

11. The light engine (100) of claim 10, wherein a corresponding cross-sectional area of the beam aperture (29) is larger than a corresponding cross-sectional area of the laser beam passing through the beam aperture (29).

12. The light engine (100) according to any one of claims 3 to 4, wherein the second laser arrangement (11) comprises a plurality of individual second laser beam emitters (22), and wherein the first reflector arrangement (12) comprises a reflector (28) configured with a plurality of beam apertures (30) for passing respective portions of the laser beams emitted by at least a subset of the second laser beam emitters (22).

13. The light engine (100) of claim 12, wherein a corresponding cross-sectional area of the beam aperture (30) is less than 0.25 times a corresponding cross-sectional area of the laser beam passing through the beam aperture (30).

14. The light engine (100) according to any one of claims 6 to 13, wherein the beam reflector (24, 27) and / or the beam aperture (29, 30) is circular, oval or elliptical.

15. A luminaire (101) comprising the light engine (100) according to any one of the preceding claims and a controller (103) for controlling the first laser device (10) and the second laser device (11).

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