Improved Light Engine

Abstract

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

Description

[Technical Field]

[0001] The present disclosure relates to a light engine having a laser device, the light engine configured to generate white light. [Background technology]

[0002] For example, to provide a visually pleasing viewing of a live performance in a venue such as a theater stage or concert hall, it is often important that the performance be illuminated 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 commonly used for such purposes. Needless to say, large venues require powerful light engines capable of emitting light with high intensities. Such light engines may comprise laser light sources in the form of a so-called laser bank having multiple individual laser beam emitters that, using various optical components, can generate the desired light, e.g., white light, to illuminate the venue.

[0003] However, a disadvantage of laser beam light from the perspective of providing a visually pleasing viewing of a live performance in a theater or concert venue is that laser beam light is substantially monochromatic. Although laser banks with multiple laser beam emitters can provide very high intensity light, the problem still remains of how to enable a light engine to provide high intensity white light. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above, it is an object of the present disclosure to overcome the disadvantages associated with laser bank-based light engines. [Means for solving the problem]

[0005] This object is achieved in a first aspect by a light engine configured to generate engine light.

[0006] The light engine of the first embodiment includes a first laser device configured to emit a first blue laser beam and a second laser device configured to emit a second blue laser beam. The light engine further includes a first mirror device, e.g., a dichroic mirror or a metal mirror, that is partially reflective to the second blue laser beam and partially transmissive to the second blue laser beam and configured to split the second blue laser beam emitted by the second laser device into a first portion of the second blue laser beam and a second portion of the second blue laser beam, wherein a ratio (R) of the first portion of the second blue laser beam to the second portion of the second blue laser beam is in the range of 0.1 to 2. A beam combiner is disposed downstream of the first mirror device and configured to combine the first blue laser beam and the first portion of the second blue laser beam and direct the combined first blue laser beam and the first portion of the second blue laser beam toward a phosphor element. The phosphor element is disposed downstream of the beam combiner and is configured to receive the first blue laser light emitted by the first laser device, receive a first portion of the second blue laser light, and convert the first blue laser light emitted by the first laser device and the first portion of the second blue laser light into converted light (e.g., green-yellow and / or red). The light engine is configured to collimate the converted light (e.g., green-yellow and / or red) emitted by the phosphor element and combine the collimated converted light (e.g., green-yellow and / or red) with a second portion of the second blue laser light emitted by the second laser device to generate the 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 more preferably at least 88.

[0007] In other words, the blue laser light provided by the first laser device, together with a portion of the blue laser light provided by the second laser device, is used to pump a phosphor element that provides a (e.g., green-to-yellow and / or red) conversion engine light, while the remaining blue light provided by the second laser device is used to provide the blue engine light. The combination of the (e.g., green-to-yellow and / or red) conversion engine light and the blue engine light creates a desired high-intensity white engine light that can provide a visually pleasing viewing experience of live performances in theaters or concert venues, or other lighting applications.

[0008] In an embodiment, the first mirror device may be configured to partially reflect the blue laser light emitted by the second laser device to form a first portion of the second blue laser light, and to partially transmit the blue laser light emitted by the second laser device to form a second portion of the second blue laser light.

[0009] Alternatively, in an embodiment, the first mirror device may be configured to partially transmit the blue laser light emitted by the second laser device into a first portion of the second blue laser light, and to partially reflect the blue laser light emitted by the second laser device into a second portion of the second blue laser light.

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

[0011] In embodiments, the second laser device may include a second laser bank. The second laser bank may include, for example, a plurality of individual second laser beam emitters configured to emit second laser light. The plurality of individual second laser beam emitters may be arranged in a second laser array. The second laser bank may include, for example, a second heat sink for cooling the plurality of individual second laser beam emitters. The second laser bank may include, for example, a second optical structure for collimating the second laser light into laser beams emitted by the second laser beam emitters.

[0012] 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.

[0013] In an embodiment, the first blue laser light may have a first (main and / or centroid) emission peak wavelength (λ1), and the second blue laser light may have a second (main and / or centroid) emission peak wavelength (λ2), where |λ2-λ1|≦20 nm, preferably |λ2-λ1|≦15 nm, more preferably |λ2-λ1|≦10 nm, and most preferably |λ2-λ1|≦5 nm.

[0014] Alternatively, in an embodiment, the first blue laser light may have a first (main and / or centroid) emission peak wavelength (λ1), and the second blue laser light may have a second (main and / or centroid) emission peak wavelength (λ2), where |λ2-λ1|>20 nm, preferably |λ2-λ1|≧25 nm, more preferably |λ2-λ1|≧30 nm, and most preferably |λ2-λ1|≧35 nm.

[0015] 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.

[0016] In embodiments, 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 preferred embodiments, the dichroic reflector may also be configured to transmit the first blue laser light, reflect a first portion of the second blue laser light, and reflect the collimated converted light.

[0017] In embodiments, 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 elements, and the one or more lenses may also be used to focus first portions of the first and second blue laser lights onto the phosphor elements.

[0018] In another preferred embodiment, a further dichroic reflector may be used, which may be arranged between the beam combiner and the phosphor element, in particular, which may be arranged between the beam combiner and the one or more lenses.

[0019] In embodiments, the light engine may further include a diffuser configured to diffuse a second portion of the second blue laser light. The diffuser may be used in a transmissive or reflective configuration. When the diffuser is used in a transmissive configuration, a first lens disposed 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 disposed 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, a first lens disposed 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.

[0020] In embodiments, the collimated converted light emitted by the phosphor element may be combined with the (diffused) second portion of the second blue laser light by using a further beam combiner, which may for example comprise a further beam combiner dichroic mirror that is transmissive to the collimated converted light and reflective to the second portion of the second blue laser light, or that is reflective to the collimated converted light and transmissive to the second portion of the second blue laser light, to combine the collimated converted light with the (collimated) (diffused) second portion of the second blue laser light. Alternatively, the further beam combiner may comprise, for example, a polarizing beam splitter that is transmissive to the collimated converted light and reflective to the second portion of the second blue laser light having a first polarization and transmissive to the second portion of the second blue laser light having a second polarization different from the first polarization, for example rotated by 90 degrees, or that is reflective to the collimated converted light and reflective to the second portion of the second blue laser light having a first polarization and transmissive to the second portion of the second blue laser light having a second polarization different from the first polarization, for example rotated by 90 degrees.

[0021] In embodiments, the beam combiner may comprise optical components such as dichroic mirrors and / or polarizing reflectors (also known as reflective polarizers) and / or polarizing beam splitters.

[0022] In an embodiment, the phosphor elements may be in the form of a phosphor track on a wheel that is rotated by a motor.

[0023] In an embodiment, the diffuser may be in the form of a diffuser track on a (separate) wheel that is rotated by a (separate) motor.

[0024] In embodiments, the engine light may comprise the (collimated) converted light and the (collimated) (diffused) second portion of the second blue laser light, or is the (collimated) converted light and the (collimated) (diffused) second portion of the second blue laser light.

[0025] In embodiments, the 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 the range of 0.1 to 0.8 (particularly suitable for general lighting), in the range of 0.8 to 1.5 (particularly suitable for stage lighting), and / or in the range of 1.5 to 2 (particularly suitable for moving head lights).

[0026] In an embodiment, the light engine may include a diffuser configured to diffuse a second portion of the second blue laser light. The diffuser may be configured in a transmission or reflection mode. In the transmission mode, a first optical device, e.g., a lens, may be disposed 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 disposed downstream of the diffuser to collimate the second (diffused) portion of the second blue laser light (to form a collimated second portion of the second blue laser light). In the reflection mode, a third optical device, e.g., a lens, may be disposed upstream of the diffuser to focus the second portion of the second blue laser light onto the diffuser and to collimate the second (reflected) (diffused) portion of the second blue laser light (to form a collimated second portion of the second blue laser light). In the reflection mode, a quarter-wave plate may be disposed upstream of (the third optical device and) the diffuser. A polarizing beam splitter may be disposed upstream of the quarter wave plate and configured to transmit a second (undiffused) portion of the second blue laser light and reflect a second diffused portion of the second blue laser light, or vice versa.

[0027] In embodiments, the light engine may comprise a further beam combiner, for example a further dichroic mirror or a further polarising beam splitter, configured to combine the (diffused) second portion of the second blue laser light with the (collimated) converted (green-yellow and / or red) light emitted by the phosphor element.

[0028] In embodiments, the correlated color temperature of the white engine light can be changed, for example, from a first correlated color temperature to a second correlated color temperature, for example, with a difference of at least 500 K or at least 1000 K. The correlated color temperature can be changed by using a controller to individually control the first blue laser light emitted by the first laser device and the second blue laser light emitted by the second laser device. The first mirror device can be kept in a fixed position while changing the correlated color temperature.

[0029] In some embodiments, the first mirror device is specularly reflective with a reflectivity of at least 80%, preferably at least 85%, and more preferably at least 90% to the second blue laser light emitted by the second laser device.

[0030] In various embodiments, the first mirror device may 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 device may be configured to be spatially adjustable for adjusting the ratio between the first portion of the second blue laser light and the second portion of the second blue laser light.

[0031] That is, various embodiments advantageously provide the effect that the ratio between the (green-yellow and / or red) converted light and the (diffused) blue engine light can be changed so that different color temperatures can be obtained, in other words, various embodiments can provide a dynamically adjustable light engine.

[0032] 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.

[0033] That is, such a mirror, which is a very simple configuration, reflects the laser beams emitted by a subset of the second laser beam emitters, thereby allowing them to reach the phosphor elements, while, for example, allowing the remaining emitted laser beams not reflected by the mirror to survive and combine with the converted light from the phosphor elements. By configuring such a mirror to be spatially adjustable, an adjustable number of reflected laser beams can be obtained, thereby forming an embodiment of a dynamically adjustable light engine.

[0034] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first mirror device may include a plurality of beam mirrors, e.g., circular, oval, or elliptical in shape, configured to reflect respective laser beams emitted by subsets of the second laser beam emitters, e.g., a cross-sectional area of ​​each of the beam mirrors may be larger than a cross-sectional area of ​​each of the laser beams reflected by the beam mirrors.

[0035] That is, in such a configuration, each individual mirror reflects a respective laser beam emitted by a respective second laser beam emitter, thereby allowing it to reach the phosphor element, while allowing the remaining emitted laser beams not reflected by a respective mirror to survive and combine with the converted light from the phosphor element, for example. By configuring multiple such mirrors to be individually spatially adjustable, an adjustable number of reflected laser beams can be obtained, thereby providing an embodiment of a dynamically adjustable light engine.

[0036] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first mirror device may include a plurality of beam mirrors, e.g., circular, oval, or elliptical in shape, configured to reflect respective portions of the laser beams emitted by at least a subset of the second laser beam emitters, e.g., a cross-sectional area of ​​each of the beam mirrors may be less than 0.25 times the cross-sectional area of ​​each of the laser beams reflected by the beam mirrors.

[0037] That is, in such a configuration, each individual mirror has an area smaller than the cross-sectional area of ​​the respective laser beam. In that case, each mirror reflects only a portion of the respective laser beam emitted by the respective 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 respective portion of the mirror to survive and combine with the converted light from the phosphor element. By configuring multiple such mirrors to be individually spatially adjustable, an adjustable number of reflected laser beams can be obtained, thereby providing an embodiment of a dynamically adjustable light engine.

[0038] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first mirror device may include a mirror configured with a plurality of beam apertures, e.g., circular, oval, or elliptical in shape, for passing respective laser beams emitted by a subset of the second laser beam emitters, e.g., a cross-sectional area of ​​each of the beam apertures may be larger than a cross-sectional area of ​​each of the laser beams passing through the beam apertures.

[0039] That is, in such a configuration, the mirror reflects a subset of the laser beams emitted by each second laser beam emitter, thereby allowing them to reach the phosphor elements, while passing through, for example, a respective beam aperture, thereby allowing the remaining emitted laser beams not reflected by the mirror to survive and combine with the converted light from the phosphor elements. By configuring the mirror to be adjustable with respect to the number of beam apertures, an adjustable number of reflected laser beams can be obtained, thereby providing an embodiment of a dynamically adjustable light engine.

[0040] In some embodiments, the second laser device may include a plurality of individual second laser beam emitters, and the first mirror device may include a mirror configured with a plurality of beam apertures, e.g., circular, oval, or elliptical in shape, for passing respective portions of the laser beams emitted by at least a subset of the second laser beam emitters, For example, a cross-sectional area of ​​each of the beam apertures may be less than 0.25 times the cross-sectional area of ​​each of the laser beams passing through the beam apertures.

[0041] That is, in such a configuration, each individual beam aperture has an area smaller than the cross-sectional area of ​​the respective laser beam. In that case, the mirror reflects only a portion of each laser beam emitted by each 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 each beam aperture to survive and combine with the converted light from the phosphor element. By configuring the mirrors and beam apertures to be spatially adjustable, a laser beam with an adjustable portion reflected can be obtained, thereby providing an embodiment of a dynamically adjustable light engine.

[0042] As summarized above, the first mirror device can be advantageously configured in various ways to obtain a desired ratio between the first and second portions of blue light. Furthermore, by changing the number of beam mirrors or beam apertures or by changing the spatial extent of the beam mirrors or beam apertures, dynamic adjustment of the ratio between the first and second portions of blue light can be obtained.

[0043] In a further aspect, there is provided a lighting fixture comprising a light engine as summarized above and a controller for controlling the first laser device and the second laser device. Such lighting fixtures and embodiments of such lighting fixtures provide corresponding effects and advantages as summarized above. [Brief explanation of the drawings]

[0044] [Figure 1a] FIG. 1 is a block diagram that schematically illustrates a light engine. [Figure 1b] FIG. 1 is a block diagram that schematically illustrates a lighting fixture having a light engine. [Figure 2] FIG. 1 is a plan view that schematically illustrates a laser device for a light engine. [Figure 3] 1 is a plan view schematically illustrating a respective mirror device for a light engine. FIG. [Figure 4] 1 is a plan view schematically illustrating a respective mirror device for a light engine. FIG. [Figure 5] 1 is a plan view schematically illustrating a respective mirror device for a light engine. FIG. [Figure 6] 1 is a plan view schematically illustrating a respective mirror device for a light engine. FIG. [Figure 7] 1 is a plan view schematically illustrating a respective mirror device for a light engine. FIG. [Figure 8] 1A and 1B are block diagrams that schematically illustrate embodiments of respective light engines. [Figure 9]1A and 1B are block diagrams that schematically illustrate embodiments of respective light engines. [Figure 10] 1A and 1B are block diagrams that schematically illustrate embodiments of respective light engines. [Figure 11] 1A and 1B are block diagrams that schematically illustrate embodiments of respective light engines. [Figure 12] 1A and 1B are block diagrams that schematically illustrate embodiments of respective light engines. [Figure 13] 1A and 1B are block diagrams that schematically illustrate embodiments of respective light engines. [Figure 14] 1A and 1B are block diagrams that schematically illustrate embodiments of respective light engines. DETAILED DESCRIPTION OF THE INVENTION

[0045] 1a illustrates a light engine 100 configured to generate engine light 58. 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 to and partially transmissive to the second blue laser light 51 and configured to split the second blue laser light 51 emitted by second laser device 11 into a first portion of second blue laser light 53 and a second portion of second blue laser light 52, wherein a ratio (R) of first portion of second blue laser light 53 to second portion of second blue laser light 52 is in the range of 0.1 to 2. Beam combiners 68, 76 are disposed downstream of the first mirror device and are configured to combine first blue laser light 50 and first portion 53 of second blue laser light and direct the combination of first blue laser light 50 and first portion 53 of second blue laser light to phosphor element 13. Phosphor element 13 is disposed downstream of the beam combiner and is configured to receive first blue laser light 50 emitted by first laser device 10 and receive first portion 53 of second blue laser light. Phosphor element 13 converts first blue laser light 50 emitted by first laser device 10 and first portion 53 of second blue laser light into (e.g., green-yellow and / or red) converted light 55. The light engine 100 is further configured to collimate the (e.g., green-yellow) converted light 55 emitted by the phosphor element 13 and combine the collimated (e.g., green-yellow and / or red) converted light with a second portion 52 of the second blue laser light 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 more preferably at least 88.

[0046] The first mirror device 12 may be of a specular reflective type having a reflectivity of at least 80%, preferably at least 85%, and more preferably at least 90% to the second blue laser light 51 emitted by the second laser device 11. Furthermore, the first mirror device 12 may be dichroic or made of metal.

[0047] Furthermore, first mirror device 12 may be configured to adjust the ratio between first portion 53 of second blue laser light and second portion 52 of second blue laser light. For example, first mirror device 12 may be configured to be spatially adjustable for adjusting the ratio between first portion 53 of second blue laser light and second portion 52 of second blue laser light.

[0048] In various embodiments, first mirror device 12 may be configured to be spatially adjustable for adjusting the ratio between first portion 53 of second blue laser light and second portion 52 of second blue laser light by translational or rotational movement. For example, the distance between second laser device 11 and first mirror device 12 may be changed, for example, by using an (electric) motor. For example, the rotation angle of first mirror device 12 relative to second laser device 11 may be changed, for example, by using an (electric) motor.

[0049] 8-14, the light engine 100 may further include a diffuser 65, 78 configured to diffuse the second portion 52 of the second blue laser light. Additionally, in various embodiments, the first laser device 10 and / or the second laser device 11 may include laser device optics, such as one or more lenses or lens arrays.

[0050] Regarding the blue laser light emitted by laser devices 10 and 11, in various embodiments, first blue laser light 50 may 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, second blue laser light 51 may 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 may be substantially the same. Regarding (green-yellow and / or red) converted light 55, in various embodiments, it may have a main converted peak wavelength within the wavelength range of 495 nm to 590 nm, preferably 520 nm to 570 nm.

[0051] 1b is a block diagram that schematically illustrates a lighting fixture 101 having a light engine 100 such as the light engine 100 illustrated herein. The lighting fixture 101 has a controller 103 for controlling the first laser device 10 and the second laser device 11, either together or individually.

[0052] 2-7, and with continued reference to FIG. 1a, embodiments will now be described that include a first mirror arrangement 12 configuration that allows for adjustment of the ratio between a first portion 53 of the second blue laser light and a second portion 52 of the second blue laser light. Common to these embodiments is a second laser arrangement 11 configuration having a plurality of individual second laser beam emitters 22. FIG. 2 schematically illustrates these second laser beam emitters 22 arranged in a rectangular matrix configuration, as viewed from the front. Such a matrix configuration is not required, and as one skilled in the art will recognize, any non-rectangular matrix configuration may be used.

[0053] As shown in FIG. 3 , the first mirror device 12 may have a mirror 31 configured to reflect the laser beams emitted by a subset of the second laser beam emitters 22. As FIG. 3 illustrates, the mirror 31 may simply be a rectangular reflective surface. Depending on factors related to how the mirror device 12 is to be mounted in the light engine 100, the mirror device 12 may require a transparent portion 32, although such details are beyond the scope of this disclosure. In any case, the mounting of the mirror device 12 in the light engine 100 is such that a desired number of the laser beams emitted by the second laser beam emitters 22, as described herein, are reflected by the mirror 31 and ultimately reach the phosphor elements 13, while the remaining number of the laser beams emitted by the second laser beam emitters 22 pass by the mirror 31, persist, and combine with the converted light 55 from the phosphor elements 13.

[0054] As shown in Fig. 4, the first mirror device 12 may have a plurality of beam mirrors 24 configured to reflect respective laser beams emitted by a subset of the second laser beam emitters 22. As Fig. 4 illustrates, the beam mirrors 24 may be configured to be arranged in a matrix corresponding to the arrangement of the second laser beam emitters 22 as illustrated in Fig. 2, with the number of beam mirrors 24 determining how many of the laser beams emitted by the second laser beam emitters 22 are reflected and ultimately reach the phosphor elements 13. As Fig. 4 illustrates, the mirror device 12 may have a framework 23 having a beam aperture 25, as described herein, through which the laser beams emitted by the second laser beam emitters 22 that are not reflected by the beam mirrors 24 pass through the beam aperture 25 and continue to combine with the converted light 55 from the phosphor elements 13. The cross-sectional area of ​​each of the beam mirrors 24 may be larger than the cross-sectional area of ​​each of the laser beams reflected by the beam mirrors 24. In the case of a circular shape, this corresponds to a relationship in which the diameter of each of the beam mirrors 24 is greater than the diameter of each of the laser beams reflected by the beam mirrors 24 .

[0055] As shown in Figure 5, the first mirror device 12 may include a plurality of beam mirrors 27 configured to reflect respective portions of the laser beams emitted by at least a subset of the second laser beam emitters 22. As Figure 5 illustrates, the beam mirrors 27 may be configured to be arranged in a matrix corresponding to the arrangement of the second laser beam emitters 22 as illustrated in Figure 2, with the size of the beam mirrors 24 determining how much of each laser beam emitted by the second laser beam emitters 22 is reflected and ultimately reaches the phosphor elements 13. As Figure 5 illustrates, the mirror device 12 may include a frame structure 23 having a beam aperture 26, as described herein, through which the portion of the laser beam emitted by the second laser beam emitters 22 that is not reflected by the beam mirrors 27 passes, persists, and combines with converted light 55 from the phosphor elements 13. The embodiment of Fig. 5 may be combined with the embodiment illustrated in Fig. 4 to result in an embodiment in which the number of beam mirrors 27 is also selected to provide a desired ratio between first portion 53 of second blue laser light and second portion 52 of second blue laser light. Similar to the configuration illustrated in Fig. 4, the cross-sectional area of ​​each of the beam mirrors 27 in Fig. 5 may be less than 0.25 times, preferably 0.16 times, and more preferably 0.09 times the cross-sectional area of ​​each of the laser beams reflected by the beam mirrors 27. In the case of a circular shape, this corresponds to a relationship in which the diameter of each of the beam mirrors 27 is less than 0.5 times, preferably 0.4 times, and more preferably 0.3 times the diameter of each of the laser beams reflected by the beam mirrors 27.

[0056] As shown in FIG. 6 , the first mirror device 12 may include a mirror 28 configured with a plurality of beam apertures 29 for passing the respective laser beams emitted by a subset of the second laser beam emitters 22. As FIG. 6 illustrates, the beam apertures 29 may be configured to be arranged in a matrix corresponding to the arrangement of the second laser beam emitters 22 as illustrated in FIG. 2 , with the number of beam apertures 29 determining how many of the laser beams emitted by the second laser beam emitters 22 pass through the beam apertures 29, survive, and combine with the converted light 55 from the phosphor elements 13, as described herein, while the remaining laser beams emitted by the second laser beam emitters 22 are reflected by the mirror 28 and ultimately reach the phosphor elements 13. The cross-sectional area of ​​each of the beam apertures 29 may be larger than the cross-sectional area of ​​each of the laser beams passing through the beam apertures 29. In the case of a circular shape, this corresponds to a relationship in which the diameter of each of the beam apertures 29 is larger than the diameter of each of the laser beams passing through the beam apertures 29.

[0057] As shown in Fig. 7, the first mirror device 12 may include a mirror 28 configured with a plurality of beam apertures 30 for transmitting respective portions of the laser beams emitted by at least a subset of the second laser beam emitters 22. As Fig. 7 illustrates, the beam apertures 30 may be configured to be arranged in a matrix corresponding to the arrangement of the second laser beam emitters 22 as illustrated in Fig. 2, and as described herein, the size of the beam apertures 30 determines how much of the laser beams emitted by the second laser beam emitters 22 pass through the beam apertures 30, survive, and combine with the converted light 55 from the phosphor elements 13, while the remaining portions of the laser beams emitted by the second laser beam emitters 22 are reflected by the mirror 28 and ultimately reach the phosphor elements 13. The embodiment of Fig. 7 may be combined with the embodiment illustrated in Fig. 6 to obtain an embodiment in which the number of beam apertures 30 is also selected to provide a desired ratio between the first portion 53 of the second blue laser light and the second portion 52 of the second blue laser light. 6, the cross-sectional area of ​​each of the beam apertures 30 in FIG. 7 may be less than 0.25 times, preferably 0.16 times, and more preferably 0.09 times the cross-sectional area of ​​each of the laser beams passing through the beam apertures 30. In the case of a circular shape, this corresponds to a relationship in which the diameter of each of the beam apertures 30 is less than 0.5 times, preferably 0.4 times, and more preferably 0.3 times the diameter of each of the laser beams passing through the beam apertures 30.

[0058] As illustrated by the embodiments shown in Figures 4, 5, and 7, the beam mirrors 24, 27 and the beam aperture 30 may have a circular shape. However, as illustrated in Figure 6, in some embodiments, the shape of the beam aperture 29 (and the beam mirror, not shown) may have an oval or elliptical shape. Keeping in mind that the first mirror device 12 is typically disposed such that its plane is not perpendicular to the beam direction of the second blue laser light 51, and that the second blue laser light 51 is typically a beam having a circular cross section perpendicular to the beam direction, the elliptical shaped beam mirrors and beam apertures correspond advantageously to each other.

[0059] The various configurations of the first mirror device 12 exemplified above can be realized in various ways, including, but not limited to: A reflective metal sheet or layer may be perforated to create holes; A reflective layer may be applied to a transparent substrate and then patterned; A reflective pattern may be provided on the transparent substrate, for example, by using evaporation and a mask, e.g., a mask with holes or dots; The mirror may be made of aluminum and / or silver; Also, a stack of layers with different thicknesses and / or refractive indices, etc. may be used.

[0060] 8 and 9, further embodiments of the light engine will be described in some detail, focusing on how the laser beam emitted by the laser devices 10, 11 passes through the various optical components within the light engine 100 to produce the desired output of white light 58.

[0061] 8 illustrates an embodiment of a light engine 100 in which a first laser device 10 in the form of a blue laser bank emits linearly polarized first blue laser light that, 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 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 phosphor element 13, which has a motor 114 that rotates a wheel 113 containing a yellow phosphor track, which generates (green-to-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (green-to-yellow and / or red) converted light 55 is totally internally reflected by optical component 68 for subsequent combination as described below.

[0062] It should be noted that optical component 68 may be a single component that performs polarizing beam splitting of first blue laser light 50 and total internal reflection of (green-to-yellow and / or red) converted light 55. However, optical component 68 may also be in the form of two components: a dichroic reflector for the yellow light and a polarizing beam splitter for the blue light. Furthermore, phosphor element 13 may instead be in the form of a phosphor tile that is arranged on a heat sink.

[0063] A second laser device 11, also in the form of a blue laser bank, emits linearly polarized second blue laser light that provides homogenized linearly polarized second blue laser light 51 after passing through a beam homogenizer 62.

[0064] The second blue laser light 51 falls on the first mirror device 12 as described above and is partially reflected by the polarizing reflector 76 into the first portion of the second blue laser light 53. In this embodiment, the first mirror device 12 is a semi-reflective 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 with a polarization direction rotated by 90 degrees relative to the polarization direction of the blue laser light 50 provided by the first laser device 10 as described above.

[0065] A first portion 53 of the second blue laser light is reflected by optical component 68, thereby combining with first blue laser light 50, both of which are focused by lenses 69, 70 onto phosphor element 13 to 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, as described above, and transmitted through first mirror device 12 (note that this is a dichroic mirror), and through polarizing beam splitter (or mirror) 64 for blue light, which is disposed parallel to first mirror device 12.

[0066] The second portion 52 of the second blue laser light that is not reflected by the mirror device 12 and that is transmitted through the polarizing beam splitter 64 for blue light is then collected by the lens 66 onto the diffuser 65. The reflected diffused blue light is then collimated by the lens 66 and partially reflected by the polarizing beam splitter 64 for blue light and the first mirror device 12.

[0067] The reflected blue light 71 is then combined with the converted (green-yellow and / or red) light 55, which, after passing through homogenizer 63, exits light engine 100 in the form of engine light 58 having the desired color temperature. Further optical components may then be applied to engine light 58 for projection, if desired.

[0068] 9 illustrates an embodiment of a light engine 100 in which a first laser device 10 in the form of a blue laser bank emits linearly polarized first blue laser light that becomes homogenized linearly polarized first blue laser light 50 after passing through a beam homogenizer 61. The first blue laser light 50 then passes through 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 phosphor element 13, which has a motor 114 that rotates a wheel 113 containing a yellow phosphor track, which generates (green-to-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (green-to-yellow and / or red) converted light 55 is totally internally reflected by optical component 68 for subsequent combination as described below. It should be noted that optical component 68 may be a single component that performs polarizing beam splitting of first blue laser light 50 and total internal reflection of the (green-to-yellow and / or red) converted light 55. However, optical component 68 may also be in the form of two components: a dichroic reflector for the yellow light and a polarizing beam splitter for the blue light.

[0069] A second laser device 11, also in the form of a blue laser bank, emits linearly polarized second blue laser light that provides homogenized linearly polarized second blue laser light 51 after passing through a beam homogenizer 62.

[0070] The second blue laser light 51 falls on the first mirror device 12 as described above and is partially reflected by the polarizing reflector 76 to become the first portion of the second blue laser light 53. In this embodiment, the first mirror device 12 is a semi-reflective 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 with a polarization direction rotated 90 degrees relative to the polarization direction of the first blue laser light 50 generated by the first laser device 10 as described above.

[0071] A first portion 53 of the second blue laser light is reflected by optical component 68, thereby combining with first blue light 50, both of which are focused by lenses 69, 70 onto phosphor element 13 to 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, as described above, and transmitted through first mirror device 12 (note that this is a dichroic mirror), and through polarizing beam splitter 64 for blue light, which is disposed parallel to first mirror device 12.

[0072] The second portion 52 of the second blue laser light that is not reflected by the mirror device 12 is linearly polarized when it passes through the polarizing beam splitter 64 for blue light and becomes circularly polarized light 75 after passing through the quarter-lambda plate 67. The circularly polarized light 75 is then collected by the polarization-maintaining reflective diffuser 73. The reflected diffused blue light is collimated by the lens 66 to become collimated blue light 72 and becomes linearly polarized blue light 74 after passing through the quarter-lambda plate 67. The linearly polarized blue light 74 has a polarization direction rotated 90 degrees relative to the polarization direction of the linearly polarized light 52 and is therefore totally reflected by the polarizing beam splitter 64 for blue light.

[0073] The reflected blue light 74 is then combined with the converted (green-yellow and / or red) light 55, which, after passing through homogenizer 63, exits light engine 100 in the form of engine light 58 having the desired color temperature. Further optical components may then be applied to engine light 58 for projection, if desired.

[0074] 10 illustrates an embodiment of a light engine 100 in which a first laser device 10 in the form of a blue laser bank emits linearly polarized first blue laser light that, 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 phosphor elements 13 in the form of phosphor tiles 115 disposed on a heat sink 116, which generate (green-to-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (green-to-yellow and / or red) converted light 55 is totally internally reflected by the optical component 68 for subsequent combination as described below.

[0075] It should be noted that optical component 68 may be a single component that performs polarizing beam splitting of first blue laser light 50 and total internal reflection of (green-to-yellow and / or red) converted light 55. However, optical component 68 may also be in the form of two components: a dichroic reflector for the yellow light and a polarizing beam splitter for the blue light. Furthermore, phosphor element 13 may instead be in the form of a yellow phosphor track on a wheel that is rotated by a motor as illustrated in other embodiments herein.

[0076] A second laser device 11, also in the form of a blue laser bank, emits linearly polarized second blue laser light that provides homogenized linearly polarized second blue laser light 51 after passing through a beam homogenizer 62.

[0077] The second blue laser light 51 falls on the first mirror device 12 as described above and is partially reflected by the polarizing reflector 76 to become the first portion of the second blue laser light 53. In this embodiment, the first mirror device 12 is a semi-reflective 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 with a polarization direction rotated 90 degrees relative to the polarization direction of the first blue laser light 50 generated by the first laser device 10 as described above.

[0078] A first portion 53 of the second blue laser light is reflected by optical component 68, thereby combining with first blue laser light 50, both of which are focused by lenses 69, 70 onto phosphor element 13 to 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 and transmitted through first mirror device 12 (note that this is a dichroic mirror), as described above.

[0079] The second portion 52 of the second blue laser light not reflected by the mirror device 12 is then collected by a diffuser 78 via a reflector 77 and a lens 91. The diffused blue light is then collected by a lens 92 to become collimated blue light 71, which is reflected via a reflector 77 and a dichroic reflector for blue light 93 to combine with the converted (green-yellow and / or red) light 55 and exit the light engine 100 after passing through a homogenizer 63 in the form of engine light 58 having a desired color temperature. Further optical components may then be applied to the engine light 58 for projection, if desired.

[0080] 11 illustrates an embodiment of a light engine 100 in which a first laser device 10 in the form of a blue laser bank emits linearly polarized first blue laser light that, 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 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 phosphor elements 13 in the form of phosphor tiles 115 disposed on a heat sink 116, which generate (green-to-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (green-to-yellow and / or red) converted light 55 is totally internally reflected by optical component 68 for subsequent combination as described below.

[0081] It should be noted that optical component 68 may be a single component that performs polarizing beam splitting of first blue laser light 50 and total internal reflection of (green-to-yellow and / or red) converted light 55. However, optical component 68 may also be in the form of two components: a dichroic reflector for the yellow light and a polarizing beam splitter for the blue light. Furthermore, phosphor element 13 may instead be in the form of a yellow phosphor track on a wheel that is rotated by a motor as illustrated in other embodiments herein.

[0082] A second laser device 11 , also in the form of a blue laser bank, emits linearly polarized second blue laser light which is split by a mirror device 12 into a first blue laser light beam 80 and a second blue laser light beam 81 .

[0083] The first blue laser light beam 80 corresponds to the first portion 53 of the second blue laser light as illustrated above in connection with Figures 8-10, and the second blue laser light beam 81 corresponds to the second portion 52 of the second blue laser light as illustrated above in connection with Figures 8-10.

[0084] The second blue laser light beam 81 is homogenized via beam homogenizer 62. The first blue laser light beam 80 is reflected via reflector 79 and via polarizing beam splitter 76 for blue light, whereby it is combined with blue light 50, both of which are focused by lenses 69, 70 onto phosphor element 13 to become converted (green-yellow and / or red) light 55. The converted (green-yellow and / or red) light 55 is then totally reflected by optical component 68 for subsequent combination.

[0085] The second blue light beam 81 that is not reflected by the mirror device 12 passes through the polarizing beam splitter 82, where it passes through the quarter-lambda plate 67 and, via the lens 66, becomes circularly polarized (left-handed), which, after being reflected by the polarization-maintaining reflector 65, becomes reversely polarized (e.g., right-handed). After passing through the quarter-lambda plate 67 again, the polarization becomes a 90-degree rotated (e.g., s-polarized) blue laser light beam 83, which is reflected by the polarizing beam splitter 82, passes through the polarizing beam splitter 76 and the optical component 68, is combined with the converted (green-to-yellow and / or red) light 55, and, after passing through the homogenizer 63, leaves the light engine 100 in the form of engine light 58 having the desired color temperature. Further optical components may then be applied to the engine light 58 for projection, if desired.

[0086] 12 illustrates an embodiment of a light engine 100 in which a first laser device 10 in the form of a blue laser bank emits linearly polarized first blue laser light that, 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 a polarizing beam splitter 76 for blue light and optical components 68. The first blue laser light 50 is then focused by lenses 69, 70 onto phosphor elements 13 in the form of phosphor tiles 115 disposed on a heat sink 116, which generate (green-to-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (green-to-yellow and / or red) converted light 55 is totally internally reflected by optical components 68 for subsequent combination as described below.

[0087] It should be noted that optical component 68 may be a single component that performs polarizing beam splitting of first blue laser light 50 and total internal reflection of (green-to-yellow and / or red) converted light 55. However, optical component 68 may also be in the form of two components: a dichroic reflector for the yellow light and a polarizing beam splitter for the blue light. Furthermore, phosphor element 13 may instead be in the form of a yellow phosphor track on a wheel that is rotated by a motor as illustrated in other embodiments herein.

[0088] A second laser device 11 , also in the form of a blue laser bank, emits linearly polarized second blue laser light which is split by a mirror device 12 into a first blue laser light beam 80 and a second blue laser light beam 81 .

[0089] The first blue laser light beam 80 corresponds to the first portion 53 of the second blue laser light as illustrated above in connection with Figures 8-10, and the second blue laser light beam 81 corresponds to the second portion 52 of the second blue laser light as illustrated above in connection with Figures 8-10.

[0090] Second blue laser light beam 81 is homogenized via beam homogenizer 62. First blue laser light beam 80 is reflected via reflector 79, polarizing beam splitter 84 for blue light, and reflector 85, and reflected via polarizing beam splitter 76 for blue light, thereby becoming combined with blue light 50, both of which are focused by lenses 69, 70 onto phosphor element 13 to 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.

[0091] The second blue light beam 81 that is not reflected by the mirror device 12 passes through the polarizing beam splitter 82, where it passes through the quarter-lambda plate 67 and, via the lens 66, becomes circularly polarized (left-handed), which, after being reflected by the polarization-maintaining reflector 65, becomes reversely polarized (e.g., right-handed). After passing through the quarter-lambda plate 67 again, the polarization becomes a 90-degree rotated (e.g., s-polarized) blue laser light beam 83, which is reflected by the polarizing beam splitter 82, passes through the polarizing beam splitter 84 and the optical component 68, is combined with the converted (green-to-yellow and / or red) light 55, and, after passing through the homogenizer 63, leaves the light engine 100 in the form of engine light 58 having the desired color temperature. Further optical components may then be applied to the engine light 58 for projection, if desired.

[0092] 13 illustrates an embodiment of a light engine 100 in which a first laser device 10 in the form of a blue laser bank emits linearly polarized first blue laser light that, 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 a polarizing beam splitter 76 for blue light and optical components 68. The first blue laser light 50 is then focused by lenses 69, 70 onto phosphor elements 13 in the form of phosphor tiles 115 disposed on a heat sink 116, which generate (green-to-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (green-to-yellow and / or red) converted light 55 is totally internally reflected by optical components 68 for subsequent combination as described below.

[0093] It should be noted that optical component 68 may be a single component that performs polarizing beam splitting of first blue laser light 50 and total internal reflection of (green-to-yellow and / or red) converted light 55. However, optical component 68 may also be in the form of two components: a dichroic reflector for the yellow light and a polarizing beam splitter for the blue light. Furthermore, phosphor element 13 may instead be in the form of a yellow phosphor track on a wheel that is rotated by a motor as illustrated in other embodiments herein.

[0094] A second laser device 11 , also in the form of a blue laser bank, emits linearly polarized second blue laser light which is split by a mirror device 12 into a first blue laser light beam 80 and a second blue laser light beam 81 .

[0095] The first blue laser light beam 80 corresponds to the first portion 53 of the second blue laser light as illustrated above in connection with Figures 8-10, and the second blue laser light beam 81 corresponds to the second portion 52 of the second blue laser light as illustrated above in connection with Figures 8-10.

[0096] The second blue laser light beam 81 is homogenized via beam homogenizer 62. The first blue laser light beam 80 is reflected via reflector 79 and polarizing beam splitter 76 for blue light, thereby combining with the first blue laser light 50, both of which are focused by lenses 69, 70 onto phosphor element 13 to become converted (green-yellow and / or red) light 55. The converted (green-yellow and / or red) light 55 is then totally reflected by optical component 68 for subsequent combination.

[0097] The second blue light beam 81 that is not reflected by the mirror device 12 passes through the polarizing beam splitter 82, where it passes through the quarter-lambda plate 67 and, via the lens 66, becomes circularly polarized (left-handed), which, after being reflected by the polarization-maintaining reflector 65, becomes reversely polarized (e.g., right-handed). After passing through the quarter-lambda plate 67 again, the polarization becomes a 90-degree rotated (e.g., s-polarized) blue laser light beam 83, which is reflected by the polarizing beam splitter 82, passes through the optical component 68, is combined with the converted (green-yellow and / or red) light 55, and, after passing through the homogenizer 63, leaves the light engine 100 in the form of engine light 58 having the desired color temperature. Further optical components may then be applied to the engine light 58 for projection, if desired.

[0098] 14 illustrates an embodiment of a light engine 100 in which a first laser device 10 in the form of a blue laser bank emits linearly polarized first blue laser light that, 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 a polarizing beam splitter 76 for blue light and optical components 68. The first blue laser light 50 is then focused by lenses 69, 70 onto phosphor elements 13 in the form of phosphor tiles 115 disposed on a heat sink 116, which generate (green-to-yellow and / or red) converted light 55, which is also focused by lenses 69, 70. The (green-to-yellow and / or red) converted light 55 is totally internally reflected by optical components 68 for subsequent combination as described below.

[0099] It should be noted that optical component 68 may be a single component that performs polarizing beam splitting of first blue laser light 50 and total internal reflection of (green-to-yellow and / or red) converted light 55. However, optical component 68 may also be in the form of two components: a dichroic reflector for the yellow light and a polarizing beam splitter for the blue light. Furthermore, phosphor element 13 may instead be in the form of a yellow phosphor track on a wheel that is rotated by a motor as illustrated in other embodiments herein.

[0100] A second laser device 11 , also in the form of a blue laser bank, emits linearly polarized second blue laser light which is split by a mirror device 12 into a first blue laser light beam 80 and a second blue laser light beam 81 .

[0101] The first blue laser light beam 80 corresponds to the first portion 53 of the second blue laser light as illustrated above in connection with Figures 8-10, and the second blue laser light beam 81 corresponds to the second portion 52 of the second blue laser light as illustrated above in connection with Figures 8-10.

[0102] The second blue laser light beam 81 is homogenized via beam homogenizer 62. The first blue laser light beam 80 is reflected via reflector 79 and polarizing beam splitter 76 for blue light, thereby combining with the first blue laser light 50, both of which are focused by lenses 69, 70 onto phosphor element 13 to become converted (green-yellow and / or red) light 55. The converted (green-yellow and / or red) light 55 is then totally reflected by optical component 68 for subsequent combination.

[0103] The second blue light beam 81 not reflected by the mirror device 12 passes through the beam homogenizer 62 and is collected by the diffuser 78 via the reflector 87 and the lens 91. The diffused blue light is then collected by the lens 92 into collimated blue light 88, which passes through the optical components 68, is combined with the converted (green-yellow and / or red) light 55, and after passing through the homogenizer 63 exits the light engine 100 in the form of engine light 58 having the desired color temperature. Further optical components may then be applied to the engine light 58 for projection, if desired.

[0104] Those skilled in the art will appreciate that the present invention is by no means limited to the preferred embodiments described above, but on the contrary, many modifications and variations are possible within the scope of the appended claims.

Claims

1. a light engine configured to generate engine light; a first laser device configured to emit a first blue laser light; a second laser device configured to emit a second blue laser light; a first mirror device that is partially reflective to the second blue laser light and partially transmissive to the second blue laser light, the first mirror device being 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 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 disposed downstream of the first mirror device and configured to combine the first blue laser light with a first portion of the second blue laser light and direct the combination of the first blue laser light with the first portion of the second blue laser light toward a phosphor element; a light engine comprising: the phosphor element disposed downstream of the beam combiner and configured to receive the first blue laser light emitted by the first laser device, receive a first portion of the second blue laser light, and convert the first blue laser light emitted by the first laser device and the first portion of the second blue laser light into converted light; the light engine is configured to collimate the converted light emitted by the phosphor element and combine the collimated converted light with a second portion of the second blue laser light emitted by the second laser device to generate the engine light, wherein 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 most preferably at least 88.

2. 2. The light engine of claim 1, wherein the first mirror device is specularly reflective with a reflectivity of at least 80%, preferably at least 85%, more preferably at least 90% to the second blue laser light emitted by the second laser device.

3. 3. The light engine of claim 1 or 2, wherein the first mirror device is configured to adjust a ratio between the first portion of the second blue laser light and the second portion of the second blue laser light.

4. 4. The light engine of claim 3, wherein the first mirror device is configured to be spatially adjustable for adjustment of the ratio between the first portion of the second blue laser light and the second portion of the second blue laser light.

5. 5. A light engine as claimed in claim 3 or 4, wherein the second laser arrangement comprises a plurality of individual second laser beam emitters, and the first mirror arrangement comprises a mirror configured to reflect laser beams emitted by a subset of the second laser beam emitters.

6. 5. A light engine as claimed in claim 3 or 4, wherein the second laser arrangement comprises a plurality of individual second laser beam emitters, and the first mirror arrangement comprises a plurality of beam mirrors configured to reflect respective laser beams emitted by subsets of the second laser beam emitters.

7. 7. The light engine of claim 6, wherein a cross-sectional area of ​​each of said beam mirrors is greater than a cross-sectional area of ​​each of said laser beams reflected by said beam mirrors.

8. 5. A light engine as claimed in claim 3 or 4, wherein the second laser arrangement comprises a plurality of individual second laser beam emitters, and the first mirror arrangement comprises a plurality of beam mirrors configured to reflect respective portions of laser beams emitted by at least a subset of the second laser beam emitters.

9. 9. The light engine of claim 8, wherein the cross-sectional area of ​​each of the beam mirrors is less than 0.25 times the cross-sectional area of ​​each of the laser beams reflected by the beam mirrors.

10. 5. A light engine as claimed in claim 3 or 4, wherein the second laser arrangement comprises a plurality of individual second laser beam emitters, and the first mirror arrangement comprises a mirror configured with a plurality of beam apertures for passing respective laser beams emitted by a subset of the second laser beam emitters.

11. 11. The light engine of claim 10, wherein a cross-sectional area of ​​each of said beam apertures is greater than a cross-sectional area of ​​each of said laser beams passing through said beam apertures.

12. 5. A light engine as claimed in claim 3 or 4, wherein the second laser arrangement comprises a plurality of individual second laser beam emitters, and the first mirror arrangement comprises a mirror configured with a plurality of beam apertures for passing respective portions of laser beams emitted by at least a subset of the second laser beam emitters.

13. 13. The light engine of claim 12, wherein the cross-sectional area of ​​each of the beam apertures is less than 0.25 times the cross-sectional area of ​​each of the laser beams passing through the beam apertures.

14. 14. A light engine according to any one of claims 6 to 13, wherein the beam mirror and / or the beam aperture are circular, oval or elliptical.

15. 15. A lighting fixture comprising a light engine according to any one of claims 1 to 14 and a controller for controlling the first laser device and the second laser device.

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