WO2020119354A1

WO2020119354A1 - Laser illumination lamp

Info

Publication number: WO2020119354A1
Application number: PCT/CN2019/116986
Authority: WO
Inventors: 张贤鹏
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2018-12-11
Filing date: 2019-11-11
Publication date: 2020-06-18
Also published as: CN111306512A

Abstract

A laser illumination lamp (100), comprising a light source assembly (10), a first reflector (20), a wavelength conversion element (30), a light guide element (40), wherein the light source assembly (10) is used for generating and outputting exciting light (11), the first reflector (20) and the wavelength conversion element (30) are provided in the light guide element (40), the first reflector (20) is used for reflecting the exciting light (11) onto the wavelength conversion element (30), the wavelength conversion element (30) is used for converting the exciting light (11) into excited light (12) and reflecting the excited light (12) onto the light guide element (40), and the excited light (12) is emitted after being shaped by the light guide element (40). The first reflector (20) and the wavelength conversion element (30) are provided in the light guide element (40), on one hand, the exciting light (11) can irradiate the wavelength conversion element (30) smoothly, and the excited light (12) can irradiate the light guide element (40) smoothly; on the other hand, the structure of the laser illumination lamp (100) is more compact, the volume is smaller, and the light collection efficiency is higher.

Description

Laser lighting

Technical field

The invention relates to the technical field of lighting, in particular to a laser lighting fixture.

Background technique

The laser has the advantages of high brightness and high coherence. The laser excitation wavelength conversion element is used to obtain high-brightness white light, which can be used for military lighting or as a car high beam.

The white light obtained by the laser excitation wavelength conversion element is Lambertian light, the divergence angle is large, and the illumination distance is limited. To achieve long-distance illumination, the illumination beam needs to have a high directivity, and to obtain a high directivity, the illumination beam needs to be The illumination light is collected and collimated so that the divergence angle of the illumination beam is small.

Because the laser has high brightness and high coherence, that is, high power density, when the wavelength conversion element is excited, the wavelength conversion element generates a large amount of heat. In order to maintain the high efficiency of the wavelength conversion element, the wavelength conversion element needs to be radiated. In the existing laser fluorescent light source, a transmissive scheme is usually adopted, that is, the laser radiation and the fluorescence exit are located on both sides of the wavelength conversion element, so there is a problem that the wavelength conversion element is difficult to dissipate heat, and can only meet the low-power lighting requirements ; If you need to further increase the power, the reflective solution is generally used, that is, the laser radiation and the fluorescence exit are located on the same side of the wavelength conversion element, and the other side of the wavelength conversion element is connected to the heat dissipation element for heat dissipation, but this solution requires A spectroscopic element is used to split the laser light and the fluorescent light, so that the excitation light can be smoothly irradiated on the wavelength conversion element and the fluorescence can be smoothly emitted. The laser fluorescent light source has a large volume and low light utilization rate.

Summary of the invention

The present invention provides a laser lighting fixture to solve the technical problems in the prior art that the laser lighting fixture is large in volume and low in light utilization rate.

In order to solve the above technical problems, the present invention provides a laser lighting fixture including: a light source assembly, a first reflector, a wavelength conversion element, a second reflection layer, and a light guide element, the light source assembly is used to produce Excitation light, the first reflector and the wavelength conversion element are disposed in the light guide element, the second reflection layer is disposed on a side of the wavelength conversion element away from the light guide element, the first A reflecting member is used to reflect the excitation light onto the wavelength conversion element, the wavelength conversion element is used to convert the excitation light into a laser beam, and the second reflection layer is used to reflect the laser beam On the light guide element, the received laser light is emitted after being shaped by the light guide element.

The beneficial effects of the present invention are: different from the situation in the prior art, the present invention can make the excitation light emitted by the light source component be irradiated to the wavelength smoothly by disposing the first reflector and the wavelength conversion element inside the light guide element The conversion element, and the laser light emitted by the wavelength conversion element can smoothly enter the light guide element. On the other hand, the structure of the laser lighting fixture can be compact and the volume is small, and the light utilization rate of the laser lighting fixture is high.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on these drawings.

1 is a schematic structural view of an embodiment of the laser lighting fixture of the present invention;

2 is another schematic structural view of an embodiment of the laser lighting fixture of the present invention;

3 is another schematic structural view of an embodiment of the laser lighting fixture of the present invention;

4 is another schematic structural view of an embodiment of the laser lighting fixture of the present invention;

5 is a schematic plan view of an embodiment of the laser lighting fixture of the present invention;

FIG. 6 is a schematic structural plan view of an embodiment of the laser lighting fixture of the present invention;

7 is a schematic plan view of the heat dissipation device of the laser lighting fixture in FIG. 1;

8 is another schematic structural view of an embodiment of the laser lighting fixture of the present invention;

9 is another schematic structural view of an embodiment of the laser lighting fixture of the present invention.

detailed description

The present application will be described in further detail below with reference to the drawings and embodiments. In particular, the following examples are only used to illustrate this application, but do not limit the scope of this application. Similarly, the following embodiments are only a part of the embodiments of the present application but not all the embodiments. All other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Reference herein to "embodiments" means that specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art understand explicitly and implicitly that the embodiments described herein can be combined with other embodiments.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a first embodiment of the laser lighting fixture of the present invention.

The present invention provides a laser lighting fixture 100 including a light source assembly 10, a first reflector 20, a wavelength conversion element 30, a second reflective layer 31, and a light guide element 40. The light source assembly 10 is used to generate the excitation light 11, the first reflector 20 is used to reflect the excitation light 11 onto the wavelength conversion element 30, and the wavelength conversion element 30 is used to convert the excitation light 11 irradiated thereon into the laser light 12, The second reflective layer 31 is used to reflect the laser beam 12 onto the light guide element 40. The light guide element 40 is used to shape the laser beam 12 and emit it to form the emitted light 13. Among them, the first reflector 20 and the wavelength conversion element 30 are provided inside the light guide element 40.

In the present invention, by arranging the first reflector 20 and the wavelength conversion element 30 inside the light guide element 40, on the one hand, the excitation light 11 can be irradiated on the wavelength conversion element 30 smoothly, and the laser beam 12 emitted by the wavelength conversion element 30 It can be incident on the light guide element smoothly; on the other hand, the laser lighting fixture 100 can have a compact structure, a small volume, and a high light collection efficiency.

In this embodiment, the first reflector 20 is used to reflect the excitation light 11 emitted from the light source assembly 10 onto the wavelength conversion element 30, and the excitation wavelength conversion element 30 emits the received laser light 12. In order to ensure that the first reflection member 20 can reflect the excitation light 11 emitted from the light source assembly 10 to the greatest extent, and irradiate the wavelength conversion element 30 as much as possible, the area of the first reflection member 20 cannot be too small. At the same time, since the first reflector 20 is also located on the exit optical path of the laser beam 12, the laser beam 12 irradiated on the first reflector 20 from the laser beam 12 emitted from the wavelength conversion element 30 will be reflected by the first reflector 20 However, it cannot be emitted to the outside. In order to reduce the reflected laser beam 12 to the greatest extent, the area of the first reflector 20 must be designed as small as possible. In this embodiment, the size setting of the first reflector 20 needs to take into account the utilization of the excitation light 11 and the received laser light 12 at the same time.

As shown in FIG. 1, in this embodiment, the light source assembly 10 includes a laser light source 14 and an optical element group 15. The laser light source 14 is used to generate excitation light 11. The optical element group 15 is disposed between the laser light source 14 and the first reflector 20 In the optical path between them, it is used to collect and condense the excitation light 11 emitted by the laser light source 14 to reduce the size of the spot of the excitation light 11 irradiated on the first reflection member 20, thereby further minimizing the first reflection member The area of 20 reduces the shielding of the received laser light 12, reduces the loss of the outgoing light 13, and improves the brightness of the outgoing light 13.

In this embodiment, the laser light source 14 is a semiconductor light source, preferably a laser diode, which emits blue excitation light 11. The optical element group is a condensing lens 15 which is a convex lens.

In another embodiment, to further increase the brightness of the light emitted by the laser lighting fixture, the number of light source assemblies 10 can be increased. Referring to FIG. 2, the laser lighting fixture 10 includes at least two light source assemblies 10, and at least two first reflectors 20 are provided accordingly, so that the excitation light emitted from the at least two light source assemblies 10 can be smoothly reflected onto the wavelength conversion element 30 , For exciting the wavelength conversion element 30 to emit laser light.

In another embodiment, please refer to FIG. 3, in this embodiment, the light source assembly 10 includes at least two laser light sources 14 and at least two first optical element groups 15a, wherein the laser light source 14 and the first optical element group 15a one-to-one correspondence setting. The laser light source 14 is used to generate excitation light 11, and the first optical element group 15a is used to collect, collimate, deflect, and condense the excitation light 11 emitted from the laser light source 14.

Specifically, as shown in FIG. 3, the first optical element group 15 a includes a collimating lens 16, two third reflectors 17 and a condensing lens 15. Each collimating lens 16 is provided corresponding to each laser light source 14 for collecting and collimating the excitation light 11 into parallel light. The two third reflectors 17 are used to deflect and translate the optical path of the parallel light collimated by each collimating lens 16, and the condensing lens 15 is used to converge the excitation light 11 after the third reflector 17 is deflected, which is further reduced The size of the spot of the excitation light 11 irradiated onto the first reflector 20. Through the above arrangement, the arrangement interval between the laser light sources 14 can be made larger, which is beneficial to the heat dissipation of the laser light sources 14.

In another embodiment, please refer to FIG. 4, in this embodiment, the light source assembly 10 includes at least two laser light sources 14 and a second optical element group 15b, wherein the laser light source 14 is used to generate the excitation light 11, the second The optical element group 15b is used to collect, collimate, compress, and condense the excitation light 11 emitted from the laser light source 14.

Specifically, as shown in FIG. 4, the second optical element group 15 b includes at least two collimating lenses 16, a positive and negative lens group 18 and a condensing lens 15, wherein each collimating lens 16 is provided corresponding to each laser light source 14 , Used to collect and collimate the excitation light 11 into parallel light. The positive and negative lens groups 18 are used to compress the collimated parallel light of each collimating lens 16 so that the distance between the parallel excitation rays 11 is smaller. The condensing lens 15 is used to condense the excitation light 11 after the positive and negative lens groups 18 are deflected, and further reduce the size of the spot of the excitation light 11 irradiated on the first reflector 20. Through the above arrangement, the arrangement interval between the laser light sources 14 can be made larger, which is beneficial to the heat dissipation of the laser light sources 14.

In the embodiments shown in FIGS. 3 and 4, the number of the condensing lens 15 may be one or more. For example, a corresponding condensing lens 15 may be provided for each laser light source 14, or only one condensing lens 15 may be provided. The number of condensing lenses 15 corresponds to the number of first reflectors 20, because one condensing lens is used to combine a beam The parallel excitation light converges. The number of condensing lenses 15 is not specifically limited in the present invention.

By providing at least two laser light sources 14, on the one hand, the power of the excitation light can be increased, thereby increasing the brightness of the laser lighting fixture 100; on the other hand, the life of the laser light source 14 can be extended by reducing the power of each laser light source 14, And at the same time keep the light source assembly 10 with high excitation power.

Further, a plurality of laser light sources 14 may be evenly distributed in the circumferential direction of the wavelength conversion element 30, so that the light intensity of the outgoing light 13 is uniform.

In this embodiment, the first reflector 20 may be a flat mirror. In addition, the number of the first reflecting members 20 can be flexibly selected according to the number of the condensing lenses 15. For example, in the embodiment shown in FIG. 1, one first reflecting member 20 is provided corresponding to one condensing lens 15. In the embodiment shown in FIG. 2, it includes two laser light sources 14, two condensing lenses 15 and two first reflecting members 20, and the first reflecting members 20 and the condensing lenses 15 are provided in one-to-one correspondence.

As shown in FIG. 1, in this embodiment, the first reflector 20 is located near the second incident surface 441, and the area of the first reflector 20 is set to take into account both the utilization rate of the excitation light 11 and the laser beam 12. Loss rate. The method for fixing the first reflector 20 on the area close to the second incident surface 441 can refer to the prior art, for example, the first reflector 20 can be fixed by gluing or by installing a fixing bracket, etc. No limitation.

In another embodiment, as shown in FIG. 9, the first reflector 20 can also be realized by plating or coating a reflective film layer on a part of the second incident surface 441, and since the second incident surface 441 is a spherical surface Therefore, the first reflector 20 formed in the above manner is a curved mirror. By forming a curved mirror as a first reflector 20 on a part of the second incident surface 441, not only can the number of components be reduced, but also the installation complexity can be reduced, and since the first reflector is a curved mirror, its At the same time, it has the functions of reflection and convergence. The laser spot irradiated on the wavelength conversion element 30 after being reflected by the first reflector can be smaller, which can further reduce the area of the wavelength conversion element 30, thereby reducing the laser lighting fixture 100 volume.

The laser light path can be folded by providing the first reflector 20 so that the direction of the excitation light 11 emitted by the laser light source 14 is the same as the direction of the exit light 13 of the laser lighting fixture 100, reducing the volume of the laser light source fixture 100 and the excitation light The radiation surface of 11 and the exit surface of the laser beam 12 are located on the same side of the wavelength conversion element 30, which is advantageous for providing a heat dissipation structure for the wavelength conversion element 30.

In this embodiment, the wavelength conversion element 30 is a reflection-type wavelength conversion element, and a reflection type wavelength conversion element is formed by providing a second reflection layer 31 on the side of the wavelength conversion element 30 away from the light guide element 40. The wavelength conversion element 30 includes a base and a light-emitting center. The base may be transparent silica gel, glass, or ceramic, and the light-emitting center may include phosphors, quantum dots, or other light-emitting materials. Specifically, the luminescence center is YAG phosphor, which can absorb the blue light emitted by the laser light source 14 and emit yellow fluorescence. Wherein, the blue light not converted by the wavelength conversion element 30 and the yellow fluorescence emitted by the wavelength conversion element 30 are mixed to form a white laser beam 12; the second reflection layer 31 may be a diffuse reflection layer or a metal reflection layer, where diffuse reflection The layer may be prepared from a mixture of particles such as TiO ₂ , MgO, BaSO ₄ and glue or glass powder. The metal reflective layer may be an aluminum layer or a silver layer, which may be prepared by coating or spraying.

In another embodiment, the wavelength conversion element is made of red and green phosphors and a substrate. When the blue excitation light 11 is irradiated to the wavelength conversion element 30, the wavelength conversion element 30 converts a part of blue light into red-green light, and mixes the converted red-green light and the unconverted blue light to form a white light receiving laser 12.

In this embodiment, a reflective wavelength conversion element 30 is provided, that is, the radiation surface of the excitation light 11 and the exit surface of the laser beam 12 are located on the same side of the wavelength conversion element 30, and the other side of the wavelength conversion element 30 can be connected to the scattering device. It is used for heat dissipation of the wavelength conversion element 30, so as to extend the service life of the wavelength conversion element 30, and at the same time, it is beneficial to increase the brightness of the laser beam 12.

In this embodiment, the wavelength conversion element 30 is a regular polygon, the side length of the regular polygon is 0.2-2 mm, and the maximum size of the light guide element 40 is 20-40 mm, so as to reduce the volume of the laser lighting fixture 100. In other embodiments, the wavelength conversion element 30 may also be circular or the like. In order to enhance the heat dissipation of the wavelength conversion element 30, the thickness of the wavelength conversion element 30 is 200 nm to 1000 nm.

In this embodiment, the light guide element 40 is used to collect and shape the laser beam 12 and emit it. As shown in FIG. 1, the light guide element 40 is a total internal reflection lens having an exit surface 41 and an entrance surface 42 and a reflection surface 43 connecting the exit surface 41 and the entrance surface 42. The laser beam 12 enters the light guide element 40 through the incident surface 42 and exits through the exit surface 41.

Among them, the exit surface 41 and the entrance surface 42 are transmission surfaces, and the reflection surface 43 is a total internal reflection surface. The transmission surface is a surface that allows the excitation light 12 to pass through, and the excitation light 11 is refracted when passing through the transmission surface. When the laser beam 12 is irradiated to the reflection surface, total internal reflection occurs.

In this embodiment, the incident surface 42 includes a first incident surface 442 and a second incident surface 441. The second incident surface 441 is connected to the first incident surface 442 and is disposed around the first incident surface 442. Specifically, as shown in FIG. 1, the second incident surface 441 is preferably configured as a hemispherical surface. In other application scenarios, the second incident surface may also be configured as a conical surface, and the first incident surface 442 is disposed on the second incident surface 441 Central. The first incident surface 442 and the second incident surface 441 are rotationally symmetrical about a rotation axis II. The wavelength conversion element 30 is disposed on the rotational symmetry axis II. Of the received laser light 12 emitted by the wavelength conversion element 30, the received laser light 12 at a small angle passes The first incident surface 442 enters the light guide element 40, transmits through the light guide element 40, and exits, the large-angle laser beam 12 enters the light guide element 40 through the second light entrance surface 441, and is reflected on the reflection surface 43 of the light guide element 40 Exit after total internal reflection.

In this embodiment, the reflective surface 43 is also a rotational symmetry plane, and the rotational symmetry axis of the reflective surface 43 coincides with the rotational symmetry axis of the incident surface 42, that is, the rotational symmetry axis of the reflective surface is also the II axis shown in FIG. 1 . As shown in FIG. 1, the reflecting surface 43 is a rotationally symmetric continuous curved surface. In another embodiment, the reflective surface 43 may also be formed by stitching multiple sub-planes. Among them, the multiple sub-planes are rotationally symmetrically distributed, and the rotational symmetry axis thereof coincides with the rotational symmetry axis of the incident surface 42.

In this embodiment, the exit surface 41 of the total internal reflection lens 40 may be a curved surface and/or a flat surface. The illumination light 13 emitted from the exit surface 41 of the light guide element 40 has a small divergence angle and a high collimation characteristic, thereby increasing the brightness of the illumination light 13 and the irradiation distance.

In the embodiment shown in FIG. 1, the exit surface 41 of the total internal reflection lens is composed of a flat surface and a curved surface. Specifically, the exit surface 41 includes a first exit surface 412 and a second exit surface 411. The first exit surface 412 is connected to the second exit surface 411 and is disposed around the first exit surface 412. The second exit surface 411 is a plane with a certain inclination angle. The first exit surface 412 is a rotationally symmetric curved surface and its rotation The axis of symmetry coincides with the axis of rotational symmetry of the incident surface 42, where the laser light 12 entering the light guide element from the first light incident surface 442 will exit from the first exit surface 412 and enter the light guide element 40 from the second light incident surface 441 The received laser light 12 will be emitted from the second emission surface. Through the above arrangement, the illumination light 13 emitted through the light guide element 40 can have a smaller divergence angle and higher collimation characteristics.

In another embodiment, as shown in FIG. 2, the exit surface 41 of the total internal reflection lens 40 is a flat surface, and its processing is simple and the cost is high. Of course, in another embodiment, according to the requirements of the divergence angle of the emitted illumination light 13, the exit surface 41 of the total internal reflection lens may also be a curved surface, which may be a convex curved surface or a concave curved surface, which is also a rotationally symmetric curved surface, Moreover, the rotation axis of the rotation symmetry curved surface coincides with the rotation symmetry axis of the incident surface 42.

In the embodiment shown in FIG. 1, the working principle of the laser lighting fixture 100 is as follows: the excitation light 11 emitted by the laser light source 14 is condensed by the condensing lens 15 and irradiates the first reflector 20, and the first reflector 20 will be incident The excitation light 11 is reflected onto the wavelength conversion element 30, the wavelength conversion element 30 converts the excitation light 11 into the received laser light 12, and the second reflective layer 31 reflects the received laser light 12 into the light guide element 40. Among them, if the laser beam 12 emitted by the wavelength conversion element 40 has a small emission angle, it enters the light guide element 40 from the first incident surface 442 and is refracted by the first incidence surface 442 and then exits from the first exit surface 412 of the light guide element 40 ; If the laser beam 12 emitted by the wavelength conversion element 30 has a large emission angle, it enters the light guide element 40 from the second incident surface 441, and is refracted by the second incident surface 441 to illuminate the reflective surface 43 of the light guide element 40, and then After total internal reflection by the reflection surface 43, the second exit surface 411 of the light guide element 40 emits light, and the illumination light 13 emitted from the light guide element 40 has a small emission angle and high collimation characteristics of the light beam.

In another embodiment, as shown in FIG. 4, the light guide element 40 may further include a reflective cup 45 and an optical lens 46 disposed in the reflective cup.

Specifically, the light guide element 40 includes a reflector cup 45, and the optical lens 46, the first reflection member 20 and the wavelength conversion element 30 are disposed inside the reflector cup 45. The reflective cup 45 includes a reflective surface 43, and the reflective surface 43 is a rotationally symmetric curved surface, and its rotational symmetry axis is the II-II axis shown in FIG. The centers of the optical lens 46 and the wavelength conversion element 30 are disposed on the axis of symmetry II-II, and the first reflector 20 is disposed on both sides above the wavelength conversion element 30 to reflect the excitation light 11 onto the wavelength conversion element 30 to excite the wavelength The conversion element 30 emits the received laser light 12 and reduces the blocking of the received laser light by the first reflector 20, wherein the reflection surface 43 of the reflector 45 is a smooth continuous curved surface. In another embodiment, as shown in FIG. 5, the reflective surface 43 may also be formed by stitching multiple sub-planes. Among them, a plurality of sub-planes are rotationally symmetrically distributed; the optical lens 46 is a convex lens, and the optical axis of the convex lens coincides with the symmetry axis II-II.

In this embodiment, the optical lens 46 is fixed on the reflective surface 43 of the reflector 45. Specifically, as shown in FIG. 4, in this embodiment, the optical lens 46 is mounted and fixed on the reflector 45 by a thin-strip lens holder arm 47. Of course, in other embodiments, the optical lens 46 can also be installed and fixed by a mesh-shaped or radial lens holder arm 47. The embodiment of the present application does not specifically limit the fixing method of the optical lens 46.

As shown in FIG. 6, the optical lens 46 may also be fixed on the heat sink 50. Specifically, at least two thin strip-shaped lens holder arms 47 protrudingly provided on the heat sink 50 are connected to the optical lens 46. For example, in this embodiment, three lens holder arms 47 are protrudingly provided on the heat dissipation device 50 to make the fixing of the optical lens 46 more stable.

In the embodiment shown in FIG. 4, the working principle of the laser lighting fixture 100 is as follows: the excitation light 11 emitted by the laser light source 14 is condensed by the second optical element group 15 b and irradiated on the first reflector 20, the first reflection The member 20 reflects the excitation light 11 onto the wavelength conversion element 30, the wavelength conversion element 30 converts the excitation light 11 into the received laser light 12, and the second reflection layer 31 reflects the received laser light 12 to the light guide element 40. Among them, the laser beam 12 with a small exit angle is irradiated onto the optical lens 46, and after being shaped by the optical lens 46, the illumination light 13 is emitted. The laser beam 12 having a large emission angle is irradiated onto the reflective surface 43 of the reflector cup 45, and the reflective surface 43 reflects the laser beam 12 and exits from the opening at the top of the reflector cup 45 to form the illumination light 13. Through the above settings, the divergence angle of the illumination light 13 can be made small, and the collimating characteristics of the light beam can be high.

Further, as shown in FIG. 1, the laser lighting fixture 100 further includes a heat dissipation device 50, and the wavelength conversion element 30 and the light guide element 40 are disposed on the side of the heat dissipation device 50, and the heat dissipation device 50 is used as the wavelength conversion element 30 and the light guide element The heat dissipation of 40 can enhance the heat dissipation of the wavelength conversion element 30 and the light guide element 40, thereby increasing the service life of the wavelength conversion element 30 and the light guide element 40.

The light source assembly 10 is disposed on the other side of the heat dissipation device 50 away from the light guide element 40, the first reflector 20, and the wavelength conversion element 30, and a light transmission hole 51 is also provided on the heat dissipation device 50 to enable the excitation light 11 to The first reflector 20 is irradiated by the heat sink 50.

Specifically, as shown in FIG. 1, the heat dissipation device 50 is provided between the laser light source 14 and the first reflector 20, and the condensing lens 15 is provided between the laser light source 14 and the heat dissipation device 50. The excitation light 11 emitted by the laser light source 14 is condensed by the condensing lens 15 and then passes through the light transmission hole 51 to be irradiated on the first reflector 20.

Wherein, the number of the light-transmitting holes 51 on the heat dissipation device 50 is equal to the number of the condensing lenses 15, and is corresponding to each condensing lens 15 one by one. Similarly, the number of the first reflecting elements 20 is also equal to the number of the condensing lenses 15, and the first reflecting elements 20 and the light-transmitting holes 51 are provided in one-to-one correspondence.

In this embodiment, as shown in FIG. 7, four heat-transmitting holes 51 are formed on the heat dissipation device 50, and the four light-transmitting holes 51 are rotationally symmetrically distributed on the heat dissipation device 50. The wavelength conversion element 30 is provided in the center of the four light transmission holes 51.

In another embodiment, as shown in FIG. 2, the light-transmitting hole 51 may also be filled with a light-transmitting material, or a heat-dissipating device 50 having a light-transmitting area may be used. By filling the light-transmitting hole 51 with a light-transmitting material or forming a light-transmitting area on the heat dissipation device 50, not only can the excitation light 11 be transmitted, but also the sealing of the laser lighting fixture 100 can be improved to prevent foreign impurities from entering the guide through the light-transmitting hole 51 Within the optical element 40.

In yet another embodiment, as shown in FIG. 8, the condenser lens 15 may also be disposed in the light transmission hole 51. Specifically, the size of the condensing lens 15 is the same as the size of the light transmitting hole 51, and the condensing lens 15 is fixed on the side wall of the light transmitting hole 51. By arranging the condenser lens 15 in the light transmission hole 51, the structure of the laser lighting fixture 100 can be made more compact and the volume is smaller.

In summary, in the present invention, by arranging the first reflector 20 and the wavelength conversion element 30 inside the light guide element 40, on the one hand, the excitation light 11 emitted from the light source assembly 10 can be irradiated to the wavelength conversion element 30 smoothly, and The received laser light 12 emitted by the wavelength conversion element 30 can be incident on the light guide element 40 smoothly, and collected and shaped by the light guide element 40 to form the illumination light 13. On the other hand, it can make the structure of the laser lighting fixture compact and small in size. The light utilization rate of the laser lighting fixture is higher.

The above are only the embodiments of the present invention, and therefore do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly used in other related technologies In the field, the same reason is included in the patent protection scope of the present invention.

Claims

A laser lighting fixture, characterized in that the laser lighting fixture includes: a light source assembly, a first reflector, a wavelength conversion element, a second reflection layer, and a light guide element, the light source assembly is used to generate excitation light, the The first reflection member and the wavelength conversion element are disposed in the light guide element, the second reflection layer is disposed on a side of the wavelength conversion element away from the light guide element, and the first reflection member is used for The excitation light is reflected onto the wavelength conversion element, the wavelength conversion element is used to convert the excitation light into a laser beam, and the second reflection layer is used to reflect the laser beam to the light guide Element, the laser light is emitted after being shaped by the light guide element.
The laser lighting fixture according to claim 1, wherein the light guide element is a total internal reflection lens, and the total internal reflection lens has an incident surface and an exit surface arranged oppositely and connecting the incident surface and the A reflective surface of the exit surface; the incident surface includes a first incident surface and a second incident surface, the second incident surface is connected to the first incident surface and surrounds the first incident surface, the first reflection The piece is arranged at the second incident surface.
The laser lighting fixture according to claim 2, wherein the first reflecting member is a plane reflecting mirror and is disposed in an area close to the second incident surface.
The laser lighting fixture according to claim 2, wherein the first reflecting member is provided in a partial area on the second incident surface, and the first reflecting member is a curved mirror.
The laser lighting fixture according to claim 2, wherein the exit surface of the light guide element is a flat surface and/or a curved surface.
The laser lighting fixture according to claim 1, wherein the light guide element includes a reflector cup and an optical lens disposed in the reflector cup, the reflector cup includes a reflecting surface, the first reflecting member and The wavelength conversion element is located in the reflector cup.
The laser lighting fixture according to claim 2 or 6, characterized in that the reflective surface of the light guide element is a rotationally symmetric continuous curved surface or the reflective surface of the light guide element is composed of a plurality of sub-planes of rotationally symmetrically distributed stitching .
The laser lighting fixture according to claim 1, wherein the light source assembly includes at least one laser light source and at least one optical element group, the optical element group is disposed between the laser light source and the first reflector In the optical path between, the optical element group includes at least one of a condensing lens, a collimating lens, a third mirror, or a positive and negative lens group.
The laser lighting fixture according to claim 1, wherein the laser lighting fixture further comprises a heat dissipation device, the wavelength conversion element and the light guide element are provided on the heat dissipation device, and the heat dissipation device is opened There is a light transmission hole, and the excitation light is irradiated on the first reflecting member through the light transmission hole.
The laser lighting fixture according to claim 9, wherein the light source assembly includes at least one laser light source and at least one optical element group, and the optical element group can be disposed in the light transmission hole.