CN111306512A - Laser Lighting Fixtures - Google Patents

Abstract

The invention discloses a laser lighting lamp, which comprises: the light source assembly is used for generating and outputting exciting light, the first reflecting piece and the wavelength conversion element are arranged in the light guide element, the first reflecting piece is used for reflecting the exciting light to the wavelength conversion element, the wavelength conversion element is used for converting the exciting light into excited light, the excited light is reflected to the light guide element, and the excited light is emitted after being shaped by the light guide element. Through setting up first reflector and wavelength conversion component in leaded light component's inside, can make on the one hand that the excitation light ability shines smoothly on wavelength conversion component and the excitation light ability shines smoothly to leaded light component on, on the other hand can make the structure of laser illumination lamps and lanterns compacter, and the volume is littleer, and the light collection efficiency is higher.

Description

Laser Lighting Fixtures

technical field

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

Background technique

Lasers have the advantages of high brightness and high coherence. Laser excitation wavelength conversion elements are used to obtain high-brightness white light, which can be used for military lighting or as automotive high beams.

Because 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. In order to achieve long-distance illumination, the illumination beam needs to have a high directivity. The illumination light is collected and collimated, so that the divergence angle of the illumination beam is small.

Since 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 light efficiency of the wavelength conversion element, the wavelength conversion element needs to be dissipated. In the existing laser fluorescent light source, a transmissive solution is usually adopted, that is, the radiation of the laser and the emission of the fluorescent light are located on two sides of the wavelength conversion element, so there is a problem that the wavelength conversion element is difficult to dissipate heat, which can only meet the low-power lighting requirements. ; If it is necessary to further increase the power, a reflective scheme is generally used, that is, the laser radiation and the fluorescence 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 scheme 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 fluorescent light can be outputted smoothly.

SUMMARY OF THE INVENTION

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

In order to solve the above technical problems, the present invention provides a laser lighting fixture, 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 first reflection member and the wavelength conversion element are arranged in the light guide element, the second reflection layer is arranged on the side of the wavelength conversion element away from the light guide element, the first reflection layer A reflector is used for reflecting the excitation light to the wavelength conversion element, the wavelength conversion element is used for converting the excitation light into laser light, and the second reflective layer is used for reflecting the laser light On the light guide element, the received laser light is shaped by the light guide element and then emitted.

The beneficial effects of the present invention are: different from the situation in the prior art, the present invention, by arranging the first reflector and the wavelength conversion element inside the light guide element, on the one hand can make the excitation light emitted by the light source assembly can be smoothly irradiated to the wavelength On the other hand, the laser lighting can be compact in structure and small in volume, and at the same time, the light utilization rate of the laser lighting can be higher.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used 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, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an embodiment of a laser lighting fixture of the present invention;

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

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

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

FIG. 5 is a schematic top-view structural diagram of an embodiment of the laser lighting fixture of the present invention;

6 is a schematic top view of the structure of an embodiment of the laser lighting fixture of the present invention;

7 is a schematic top view of the structure of the heat sink of the laser lighting fixture in FIG. 1;

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

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

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is particularly pointed out that the following examples are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some of the embodiments of the present application, but not all of the embodiments, and all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

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

The present invention provides a laser lighting fixture 100 , the laser lighting fixture 100 includes a light source assembly 10 , a first reflector 20 , a wavelength conversion element 30 , a second reflection 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 to the wavelength conversion element 30, and the wavelength conversion element 30 is used to convert the excitation light 11 irradiated thereon into the received laser light 12, The second reflective layer 31 is used to reflect the laser light 12 to the light guide element 40 , and the light guide element 40 is used to shape the laser light 12 and then emit it to form the output light 13 . Wherein, the first reflector 20 and the wavelength conversion element 30 are arranged 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 smoothly irradiated on the wavelength conversion element 30, and the received laser light 12 emitted by the wavelength conversion element 30 can be smoothly irradiated. It can be incident on the light guide element smoothly; on the other hand, the laser lighting fixture 100 can be made compact in structure, small in volume, and high in light collection efficiency.

In this embodiment, the first reflector 20 is used for reflecting the excitation light 11 emitted from the light source assembly 10 to 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 reflector 20 can reflect the excitation light 11 emitted from the light source assembly 10 to the greatest extent, so that the wavelength conversion element 30 is irradiated as much as possible, the area of the first reflector 20 cannot be too small. At the same time, since the first reflector 20 is also located on the outgoing optical path of the laser light 12 , the laser light 12 irradiated on the first reflector 20 from the laser light 12 emitted from the wavelength conversion element 30 will be reflected by the first reflector 20 Since it cannot be emitted to the outside, in order to minimize the reflected received laser light 12 , the area of the first reflector 20 must be designed to be as small as possible. In this embodiment, the size setting of the first reflecting member 20 needs to take into account the utilization rates 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 the excitation light 11 , and the optical element group 15 is disposed between the laser light source 14 and the first reflector 20 On the optical path between the two, the excitation light 11 emitted by the laser light source 14 is collected and converged to reduce the spot size of the excitation light 11 irradiated on the first reflector 20, thereby minimizing the size of the first reflector 20 area, thereby reducing the shielding of the received laser light 12, reducing the loss of the outgoing light 13, and improving the brightness of the outgoing light 13.

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

In another embodiment, in order to further improve the brightness of the outgoing light of the laser lighting fixture, the number of light source components 10 may 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 correspondingly arranged, so that the excitation light emitted by the at least two light source assemblies 10 can be smoothly reflected to the wavelength conversion element 30 , used to excite 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 sources 14 and the first optical element group 15a are set in one-to-one correspondence. The laser light source 14 is used for generating the excitation light 11 , and the first optical element group 15 a is used for collecting, collimating, deflecting and condensing the excitation light 11 emitted by 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 reflecting members 17 and a condensing lens 15 . Wherein, each collimating lens 16 is disposed 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 after being collimated by each collimating lens 16 , and the converging lens 15 is used to condense the excitation light 11 deflected by the third reflector 17 to further reduce the 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 increased, 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 sources 14 are used to generate the excitation light 11, the second The optical element group 15b is used for collecting, collimating, compressing and condensing the excitation light 11 emitted by 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 , for collecting and collimating the excitation light 11 into parallel light. The positive and negative lens groups 18 are used to compress the parallel light collimated by each collimating lens 16 , so that the distance between the parallel excitation light rays 11 is smaller. The condensing lens 15 is used for condensing the excitation light 11 deflected by the positive and negative lens groups 18 to further reduce the spot size of the excitation light 11 irradiated on the first reflecting member 20 . Through the above arrangement, the arrangement interval between the laser light sources 14 can be increased, which is beneficial to the heat dissipation of the laser light sources 14 .

Wherein, in the embodiments shown in FIG. 3 and FIG. 4 , the number of the condensing lenses 15 may be one or more. For example, one corresponding condensing lens 15 may be provided for each laser light source 14, or only one condensing lens 15 may be provided. The parallel excitation light is converged. The number of the condensing lenses 15 is not specifically limited in the present invention.

By arranging 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; And at the same time, the light source assembly 10 is kept high in excitation power.

Further, the plurality of laser light sources 14 can be uniformly distributed in the circumferential direction of the wavelength conversion element 30 to make the light intensity of the outgoing light 13 uniform.

In this embodiment, the first reflection member 20 may be a flat reflection mirror. Moreover, 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. In the embodiment shown in FIG. 2 , two laser light sources 14 , two condensing lenses 15 and two first reflectors 20 are included, and the first reflectors 20 and the condensing lenses 15 are arranged in a one-to-one correspondence.

As shown in FIG. 1 , in this embodiment, the first reflector 20 is arranged in an area close to the second incident surface 441 , and the size of the area of the first reflector 20 is set while taking into account the utilization rate of the excitation light 11 and the efficiency of the received laser light 12 . loss rate. The method of 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 setting a fixing bracket. This application Not limited.

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 cricket surface , so the first reflecting member 20 formed by the above method is a curved reflecting mirror. By forming a curved mirror on a partial area of the second incident surface 441 as the first reflecting member 20, not only the number of components can be reduced, but also the complexity of installation can be reduced, and since the first reflecting member is a curved mirror, its At the same time, it has the functions of reflection and convergence, and the laser light spot irradiated on the wavelength conversion element 30 after being reflected by the first reflecting member can be smaller, thereby further reducing the area of the wavelength conversion element 30, thereby reducing the size of the laser lighting fixture 100. volume.

By arranging the first reflector 20, the laser light path can be folded, so that the direction of the excitation light 11 emitted by the laser light source 14 is the same as the direction of the outgoing 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 outgoing surface of the received laser light 12 are located on the same side of the wavelength conversion element 30 , which is favorable for setting 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 the reflection type wavelength conversion element is formed by disposing the 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 substrate and a light-emitting center, the substrate may be transparent silica gel, glass or ceramics, and the light-emitting center may contain phosphors or quantum dots or other light-emitting materials. Specifically, the light-emitting center is YAG phosphor, which can absorb the blue light emitted by the laser light source 14 and emit yellow fluorescence. The blue light that is not converted by the wavelength conversion element 30 is mixed with the yellow fluorescent light emitted by the wavelength conversion element 30 to form a white received laser light 12; the second reflection layer 31 may be a diffuse reflection layer or a metal reflection layer, wherein the diffuse reflection layer 31 The layer can be prepared from a mixture of particles such as TiO ₂ , MgO, BaSO ₄ and glue or glass powder. The metal reflective layer can be an aluminum layer or a silver layer, etc., which can be prepared by coating or spraying.

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

In this embodiment, by setting the reflective wavelength conversion element 30, that is, the radiating surface of the excitation light 11 and the emitting surface of the received laser light 12 are located on the same side of the wavelength conversion element 30, the other side of the wavelength conversion element 30 can be connected to the scattering device. It is used to dissipate heat from the wavelength conversion element 30 , so as to prolong the service life of the wavelength conversion element 30 , and at the same time, it is beneficial to improve the brightness of the received laser light 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, etc. In order to enhance the heat dissipation of the wavelength conversion element 30 , the thickness of the wavelength conversion element 30 is 200 nm˜1000 nm.

In this embodiment, the light guide element 40 is used to collect and shape the laser light 12 and then emit it. As shown in FIG. 1 , the light guide element 40 is a total internal reflection lens, and the total internal reflection lens has an outgoing surface 41 and an incident surface 42 arranged opposite to each other and a reflecting surface 43 connecting the outgoing surface 41 and the incident surface 42 . The received laser light 12 enters the light guide element 40 through the incident surface 42 and exits through the exit surface 41 .

The outgoing surface 41 and the incident 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. Total internal reflection occurs when the received laser light 12 is irradiated to the reflective surface.

In this embodiment, the incident surface 42 includes a first incident surface 442 and a second incident surface 441 , and the second incident surface 441 is connected to the first incident surface 442 and disposed around the first incident surface 442 . Specifically, as shown in FIG. 1 , the second incident surface 441 is preferably set as a hemispherical surface. In other application scenarios, the second incident surface can also be set as a conical surface, and the first incident surface 442 is set on the side of the second incident surface 441 . middle. The first incident surface 442 and the second incident surface 441 are rotationally symmetric about a rotational axis I-I, and the wavelength conversion element 30 is arranged on the rotational symmetry axis I-I. The first incident surface 442 enters the light guide element 40 and is transmitted through the light guide element 40 and then exits. The large-angle laser light 12 enters the light guide element 40 through the second light incident surface 441 and is reflected on the reflective surface 43 of the light guide element 40 Exit after total internal reflection.

In this embodiment, the reflective surface 43 is also a rotationally symmetric surface, and the rotationally symmetric axis of the reflective surface 43 coincides with the rotationally symmetric axis of the incident surface 42, that is, the rotationally symmetric axis of the reflective surface is also the I-I axis shown in FIG. 1 . . As shown in FIG. 1 , the reflection surface 43 is a rotationally symmetrical continuous curved surface. In another embodiment, the reflective surface 43 may also be formed by splicing multiple sub-planes. The plurality of sub-planes are rotationally symmetrically distributed, and their rotationally symmetrical axes coincide with the rotationally symmetrical axes 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 smaller divergence angle and a higher collimation characteristic, thereby increasing the brightness and irradiation distance of the illumination light 13 .

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 arranged 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 symmetrical curved surface, and its rotation The axis of symmetry coincides with the rotational symmetry axis of the incident surface 42 , wherein the received 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 exit from the second exit surface. Through the above arrangement, the illumination light 13 emitted through the light guide element 40 can have a smaller divergence angle and have a higher collimation characteristic.

In another embodiment, as shown in FIG. 2 , the outgoing surface 41 of the total internal reflection lens 40 is a flat surface, which is simple to process and has a high cost. 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 can also be a curved surface, which can be a convex curved surface or a concave curved surface, and the curved surface is also a rotationally symmetrical curved surface, And the rotational axis of the rotationally symmetrical curved surface coincides with the rotationally symmetrical 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 then irradiated on the first reflector 20 , and the first reflector 20 will incident The excitation light 11 is reflected to 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 into the light guide element 40 . Wherein, if the emission angle of the received laser light 12 emitted by the wavelength conversion element 40 is small, it enters the light guide element 40 from the first incident surface 442 , and is refracted by the first incident 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 larger emission angle, it enters the light guide element 40 from the second incident surface 441, is refracted by the second incident surface 441 and then irradiated to the reflective surface 43 of the light guide element 40, and then After total internal reflection by the reflective surface 43 , the illumination light 13 emitted from the light guide element 40 has a smaller emission angle and a higher collimation characteristic 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 reflective cup 45 , and the optical lens 46 , the first reflector 20 and the wavelength conversion element 30 are arranged in the reflective cup 45 . The reflective cup 45 includes a reflective surface 43 , and the reflective surface 43 is a rotationally symmetric curved surface, and its rotationally symmetric axis is the II-II axis shown in FIG. 3 . The centers of the optical lens 46 and the wavelength conversion element 30 are arranged on the symmetry axis II-II, and the first reflectors 20 are arranged on both sides above the wavelength conversion element 30 to reflect the excitation light 11 to the wavelength conversion element 30 to excite the wavelength The conversion element 30 emits the received laser light 12 and reduces the shielding of the received laser light 12 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 splicing multiple sub-planes. The 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 reflective cup 45 . Specifically, as shown in FIG. 4 , in this embodiment, the optical lens 46 is mounted and fixed on the reflector 45 through a thin strip-shaped lens support arm 47 . Of course, in other embodiments, the optical lens 46 may also be installed and fixed through a mesh or radial lens support arm 47 , and 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 can also be fixed on the heat sink 50 . Specifically, at least two thin strip-shaped lens support arms 47 are protruded from the heat dissipation device 50 to be connected to the optical lens 46 . For example, in this embodiment, three lens support arms 47 are protruded on the heat sink 50 to make the fixation 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 converged by the second optical element group 15b and then irradiated on the first reflector 20 . The element 20 reflects the excitation light 11 to 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 light 12 with a smaller exit angle is irradiated onto the optical lens 46 , and is shaped by the optical lens 46 and then exits to form the illumination light 13 . The laser light 12 with a larger exit angle is irradiated on the reflecting surface 43 of the reflector 45 , and the reflecting surface 43 reflects the laser light 12 and emits the illumination light 13 from the opening at the top of the reflector 45 . Through the above arrangement, the divergence angle of the illumination light 13 can be made smaller, and the collimation characteristic of the light beam can be higher.

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 arranged on one side of the heat dissipation device 50 , so that the wavelength conversion element 30 and the light guide element are formed by the heat dissipation device 50 . The heat dissipation of the wavelength conversion element 30 and the light guide element 40 can be enhanced, thereby improving 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 the heat dissipation device 50 is also provided with a light-transmitting hole 51 to allow the excitation light 11 to pass through. The first reflector 20 is irradiated through the heat sink 50 .

Specifically, as shown in FIG. 1 , the heat dissipation device 50 is disposed between the laser light source 14 and the first reflector 20 , and the condensing lens 15 is disposed between the laser light source 14 and the heat dissipation device 50 . After the excitation light 11 emitted by the laser light source 14 is condensed by the condensing lens 15 , it passes through the light-transmitting hole 51 and is irradiated on the first reflecting member 20 .

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 provided in a one-to-one correspondence with each condensing lens 15 . Similarly, the number of the first reflectors 20 is also equal to the number of the condensing lenses 15 , and the first reflectors 20 are arranged in a one-to-one correspondence with the light-transmitting holes 51 .

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

In another embodiment, as shown in FIG. 2 , a light-transmitting material may also be filled in the light-transmitting holes 51 , 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 sink 50 , not only the excitation light 11 can be transmitted, but also the sealing performance of the laser lighting fixture 100 can be improved to prevent external impurities from entering the guide through the light-transmitting hole 51 . inside the light element 40 .

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

To sum up, 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 smoothly irradiated to the wavelength conversion element 30 , and The received laser light 12 emitted from the wavelength conversion element 30 can be smoothly incident on the light guide element 40, and is collected and shaped by the light guide element 40 to form the illumination light 13. The light utilization rate of the laser lighting fixture is high.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A laser lighting fixture, said laser lighting fixture comprising: the light guide element comprises a light source assembly, a first reflecting piece, a wavelength conversion element, a second reflecting layer and a light guide element, wherein the light source assembly is used for generating exciting light, the first reflecting piece and the wavelength conversion element are arranged in the light guide element, the second reflecting layer is arranged on one side, far away from the light guide element, of the wavelength conversion element, the first reflecting piece is used for reflecting the exciting light to the wavelength conversion element, the wavelength conversion element is used for converting the exciting light into stimulated light, the second reflecting layer is used for reflecting the stimulated light to the light guide element, and the stimulated light is emitted after being shaped by the light guide element.

2. The laser lighting fixture of claim 1, wherein the light guide element is a total internal reflection lens having oppositely disposed entrance and exit faces and a reflective face connecting the entrance and exit faces; the incident plane comprises a first incident plane and a second incident plane, the second incident plane is connected with the first incident plane and surrounds the first incident plane, and the first reflecting piece is arranged at the second incident plane.

3. The laser lighting device according to claim 2, wherein the first reflecting member is a plane mirror disposed in a region close to the second incident surface.

4. The laser lighting device according to claim 2, wherein the first reflecting member is provided in a partial region on the second incident surface, and the first reflecting member is a curved reflecting mirror.

5. The laser lighting fixture according to claim 2, wherein the exit surface of the light guide element is planar and/or curved.

6. The laser lighting fixture of claim 1 wherein the light guide element comprises a reflective cup and an optical lens disposed within the reflective cup, the reflective cup including a reflective surface, the first reflector and the wavelength conversion element being located within the reflective cup.

7. The laser lighting device according to claim 2 or 6, wherein the reflecting surface of the light guide element is a continuous curved surface with rotational symmetry or the reflecting surface of the light guide element is formed by splicing a plurality of sub-planes with rotational symmetry.

8. The laser lighting fixture of claim 1 wherein the light source assembly includes at least one laser light source and at least one optical element set disposed in the optical path between the laser light source and the first reflector, the optical element set including at least one of a converging lens, a collimating lens, a third reflector, or a positive and negative lens set.

9. The laser lighting fixture of claim 1, further comprising a heat sink, wherein the wavelength conversion element and the light guide element are disposed on the heat sink, the heat sink is formed with a light hole, and the excitation light irradiates the first reflector through the light hole.

10. The laser lighting fixture of claim 9 wherein the light source assembly includes at least one laser light source and at least one optical element set positionable within the light bore.

Images