CN112648562A - Laser lighting module - Google Patents
Laser lighting module Download PDFInfo
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- CN112648562A CN112648562A CN202011574976.1A CN202011574976A CN112648562A CN 112648562 A CN112648562 A CN 112648562A CN 202011574976 A CN202011574976 A CN 202011574976A CN 112648562 A CN112648562 A CN 112648562A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/30—Semiconductor lasers
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a laser lighting module, which consists of a laser light source unit, a wavelength conversion unit capable of exciting to emit radiation fluorescence and an emergent collimating mirror, wherein a special-shaped curved surface reflector is arranged between the wavelength conversion unit and the emergent collimating mirror, and the special-shaped curved surface reflector is integrally connected with a stray light eliminating unit and a special-shaped plane reflector at a position lower than the light emitting surface of the wavelength conversion unit; the special-shaped curved surface reflector is a paraboloid bowl-shaped body with a reflective inner wall, the top of the narrow diameter is provided with a light outlet, and the outer side of the light outlet is opposite to the emergent collimating mirror at intervals; the wavelength conversion unit has a light emitting material disposed at a focal point; laser emitted by the laser light source unit is focused and projected to the luminescent material, and radiation fluorescence is excited; the reflecting plane of the special-shaped plane reflector is vertical to the central optical axis of the special-shaped curved surface reflector. The laser lighting module improves the utilization efficiency and the output brightness of a light source, simultaneously restrains the dissipation of stray light and reduces the halo phenomenon of lighting.
Description
Technical Field
The invention relates to a light source device, in particular to a laser lighting module for improving light efficiency, and belongs to the field of laser devices.
Background
Lighting technology has advanced through the era of incandescent lamps, fluorescent lamps, and LEDs, and is coming with the fourth generation of light source technology, represented by laser light sources. The laser light source is based on a semipolar GaN laser diode, and is produced by combining advanced fluorescent ceramic technology. Because the laser is concentrated on a certain tiny spot on the fluorescent powder to emit light and convert the light into white light, the light source can output safe and highly collimated white light, and in addition, a tiny optical lens and a reflector are used to perform excellent control on the light so as to realize a better lighting effect. Compared with a blue LED, the laser does not have the problem of reduced luminous efficiency. Laser illumination can achieve significant improvements in efficiency.
Because laser illumination can not only increase throw distance, improves the security, simultaneously the volume is littleer, the structure is compacter. In addition to the field of illumination, laser display is widely applied to a plurality of fields such as projectors, digital cinema, televisions, stage lamps and automobiles.
The laser excites the fluorescent material to emit light, and the radiated light is emitted by an approximate Lambertian light source. For reflection-type fluorescence, the light-emitting angle is close to 180 degrees, and the collection of the radiation light with the large angle is the key for improving the light efficiency.
In the prior art, a laser light is provided, in which a laser source is disposed outside a reflector of a vehicle lamp to emit a laser beam, and the laser beam is projected onto a fluorescent material inside the reflector of the vehicle lamp, so as to excite fluorescence, and the fluorescence is reflected by the reflector of the vehicle lamp and then emitted in a specific direction, thereby forming a light beam traveling in a specific solid angle. However, since a part of the fluorescent light cannot be projected onto the reflector to form a light beam traveling in a specified solid angle, but is directly projected outside the reflector to form stray light, the utilization efficiency of the light and the lighting effect are reduced.
The prior art also has the advantages that a collimating lens is used for collecting laser-excited fluorescence, the numerical aperture for collecting radiation light is limited due to the limitation of the overall dimension and the installation of the lens, so that the utilization rate of a light source is improved by effectively collecting and utilizing large-angle radiation light, stray light output is not caused, the size is small as much as possible, and the structure is compact, and the problem to be solved is solved.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention is directed to a laser illumination module, which solves the problems of low utilization rate of light source, insufficient control of stray light, and large volume of illumination lamp.
The technical solution of the present invention for achieving the above object is that a laser lighting module is composed of a laser light source unit, a wavelength conversion unit that excites radiation fluorescence, and an exit collimator lens, and is characterized in that: a special-shaped curved surface reflector is arranged between the wavelength conversion unit and the emergent collimating mirror, and a stray light eliminating unit and a special-shaped plane reflector are integrally connected with the special-shaped curved surface reflector at the position lower than the light emitting surface of the wavelength conversion unit; the special-shaped curved surface reflector is a paraboloid bowl-shaped body with a reflective inner wall, a light outlet is formed in the top of the narrow diameter, and the outer side of the light outlet is opposite to the emergent collimating mirror in a spaced mode;
the wavelength conversion unit is provided with a luminescent material positioned at the focus of the special-shaped curved surface reflector and the focus of the object space of the emergent collimating mirror, and the light emitting surface of the luminescent material is flush with or higher than the wide-diameter bottom surface of the special-shaped curved surface reflector;
the laser light source unit emits laser light, which is focused and projected to the luminescent material and excites radiation fluorescence;
the reflecting plane of the special-shaped plane reflector is vertical to the central optical axis of the special-shaped curved surface reflector, and the reflecting plane is lower than the wide-diameter bottom surface;
the stray light eliminating unit is arranged at the side profile of the special-shaped plane reflector between the reflecting plane and the light emitting surface and is vertical to the reflecting plane.
The laser lighting module further comprises a light hole formed in the side wall of the special-shaped curved reflector, wherein the laser light source unit is composed of a laser, a collimating mirror, a first reflecting mirror, a focusing mirror and a second reflecting mirror, light emitted by the laser is collimated, reflected, focused and reflected to a light emitting material, the inclination angle of the second reflecting mirror corresponds to the emergent light axis, the emergent light axis penetrates through the light hole and directly points to the light emitting material, and the opening range of the light hole meets the requirement that a focused and reflected light beam completely passes through.
The laser lighting module is characterized in that the laser light is incident from a through hole arranged on the special-shaped plane reflector, the laser light source unit is composed of a laser and a collimating mirror which are arranged below the special-shaped plane reflector, and the light emitted by the laser is collimated, enters from the through hole in a direction perpendicular to the special-shaped plane reflector, is emitted to the inner wall of the special-shaped curved surface reflector, is reflected and focused to a light emitting material.
In the laser lighting module, the clear aperture of the emergent collimating mirror is equal to or larger than the diameter of the light outlet of the special-shaped curved reflector.
In the laser lighting module, the exit collimating lens is a single lens or a lens group.
The laser lighting module further comprises a fixed heat dissipation base and a luminescent material arranged on the surface of the fixed heat dissipation base, the wavelength of fluorescence radiated by excitation is different from the wavelength of laser, and the periphery of the fixed heat dissipation base is connected with the special-shaped plane reflector into a whole through the stray light eliminating unit.
The laser lighting module further has the advantages that the fluorescence light-emitting angle radiated by excitation is close to 180 degrees, one part of fluorescence is directly emitted from the light-emitting port and is collected and collimated by the emergent collimating mirror to be output as parallel light, the other part of fluorescence is emitted to the inner wall of the special-shaped curved surface reflector, and the fluorescence is circularly reflected among the special-shaped curved surface reflector, the special-shaped plane reflector and the light-emitting material.
The laser lighting module is characterized in that the stray light eliminating unit is at least provided with a matting paint coating, a light absorption sponge, black napped paper or an array black hole.
The laser lighting module provided by the invention has the outstanding substantive characteristics and remarkable progress: the light-emitting material is subjected to light-emitting range limitation and scattered light cyclic reflection re-excitation outside the range by the aid of the special-shaped curved surface reflector, the special-shaped plane reflector and the stray light eliminating unit, so that light source utilization efficiency and output brightness are improved, stray light dissipation is effectively restrained, and lighting halo is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a laser lighting module according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a laser lighting module according to a second embodiment of the present invention.
FIG. 3 is a schematic top view of the stray light eliminating unit and the special-shaped plane mirror in the embodiment shown in FIG. 2.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of understanding and controlling the technical solutions of the present invention, so as to define the protection scope of the present invention more clearly.
Generally, a conventional laser lighting module is composed of a laser light source unit, a wavelength conversion unit that is excited to emit fluorescence, and an exit collimator lens. In order to improve the efficiency of the light source, the invention optimizes the structure of each component of the traditional laser lighting module or introduces a new component, and then optimizes the space position of each component to achieve the aim.
In view of technical summary, the laser lighting module provided by the invention is provided with the special-shaped curved surface reflector between the wavelength conversion unit and the emergent collimating mirror, and the special-shaped curved surface reflector is integrally connected with the stray light eliminating unit and the special-shaped plane reflector at a position lower than the light emitting surface of the wavelength conversion unit. The necessary structural features of all the components are as follows: the special-shaped curved surface reflector is a paraboloid bowl-shaped body with a reflective inner wall, the top of the narrow diameter is provided with a light outlet, and the outer side of the light outlet is opposite to the emergent collimating mirror at intervals; the wavelength conversion unit is provided with a luminescent material positioned at the focus of the special-shaped curved surface reflector and the focus of the object space of the emergent collimating mirror, and the light emitting surface of the luminescent material is flush with or higher than the wide-diameter bottom surface of the special-shaped curved surface reflector; the laser light source unit emits laser light, which is focused and projected to the luminescent material and excites the radiation fluorescence; the reflecting plane of the special-shaped plane reflector is vertical to the central optical axis of the special-shaped curved surface reflector, and the reflecting plane is lower than the wide-diameter bottom surface; the stray light eliminating unit is arranged at the side profile of the special-shaped plane reflector between the reflecting plane and the light emitting surface and is vertical to the reflecting plane. The laser lighting module manufactured on the basis of the structural characteristic limitation can utilize laser to excite the luminescent material and radiate fluorescence in different wavelength ranges. And the divergent fluorescence is reasonably regulated and controlled, because the wavelength conversion unit is positioned on the optical axis in the special-shaped curved reflector, a part of fluorescence corresponding to the range of the light outlet is directly emitted, and the rest part outside the range of the light outlet is reflected by the inner wall of the special-shaped curved reflector, so that energy is transferred in the inner cavity of the bowl-shaped body. The light emitted from the emergent collimating mirror can be increased by circularly reflecting and repeatedly exciting the luminescent material, so that the output brightness of the lighting module is improved.
The more detailed component limitation comprises that the clear aperture of the emergent collimating mirror is equal to or larger than the diameter of the light outlet of the special-shaped curved surface reflector so as to completely collect the fluorescence emitted from the light outlet. Since the fluorescent light emitted from the light outlet is not a direct light beam but still has a certain diffusion angle, the exit collimator is mainly used for converging the light beam and emitting the light beam in parallel. The emergent collimating lens needs to completely cover the emergent fluorescence, so when the emergent collimating lens is superposed with the light outlet, the light-transmitting aperture only needs to be equal to the diameter of the light outlet. When the exit collimating lens and the light outlet are separated by a certain distance, the clear aperture needs to be larger than the diameter of the light outlet, and is enlarged in proportion. The exit collimating lens can be a single lens or a lens group.
The wavelength conversion unit comprises a fixed heat dissipation base and a luminescent material positioned on the surface of the fixed heat dissipation base, the wavelength of fluorescence radiated by excitation is different from the wavelength of laser, and the fluorescence light-emitting angle is close to 180 degrees. Wherein, part of the fluorescence is directly emitted from the light outlet and is collected and collimated by the emergent collimating mirror to be parallel light output, and the other part of the fluorescence is emitted to the inner wall of the special-shaped curved surface reflector and is circularly reflected among the special-shaped curved surface reflector, the special-shaped plane reflector and the luminescent material. The fixed heat dissipation base is mainly used for dissipating heat generated when a luminescent material is excited to radiate fluorescence and cooling, and the periphery of the fixed heat dissipation base is connected with the special-shaped plane reflector into a whole through the stray light eliminating unit. The stray light eliminating unit has light absorbing structure characteristics, and comprises light absorbing materials, light absorbing coatings or light traps, such as matting paint coatings, light absorbing sponges, black pile paper, array black holes and the like.
The laser lighting module needs laser to excite the luminescent material, and then the luminescent material is utilized to radiate fluorescence to generate lighting brightness. In view of the enclosing structure formed by the special-shaped curved surface reflector, the special-shaped plane reflector and the stray light eliminating unit, the laser light source unit emits laser towards the luminescent material, and an optional light path scheme needs to be designed. The description is presented in connection with the illustrated embodiments.
The laser can be incident from a light hole arranged on the side wall of the special-shaped curved surface reflector, the laser light source unit is composed of a laser, a collimating mirror, a first reflector, a focusing mirror and a second reflector, the light emitted by the laser is projected to a light-emitting material through collimation, reflection, focusing and re-reflection, the inclination angle of the second reflector corresponds to the emergent light axis and penetrates through the light hole and directly points to the light-emitting material, and the opening amplitude of the light hole meets the requirement that a focused and re-reflected light beam completely passes through.
Fig. 1 is a schematic structural diagram of a laser lighting module according to a first embodiment of the present invention. In the present embodiment, the laser light source unit is composed of a laser 101, a collimator lens 102, a first reflecting mirror 103, a focusing mirror 104, and a second reflecting mirror 105. As shown on the left side of fig. 1, the diverging light output from the laser 101 is collimated by the collimator lens 102, and the resulting parallel light is reflected by the first reflecting mirror 103, then converged by the focusing lens 104, and the converged light is reflected by the second reflecting mirror 105. Wherein the second reflecting mirror 105 has an inclination corresponding to the exit optical axis passing through the light-transmitting hole 106a and directed toward the light-emitting material 107 a.
The special-shaped curved reflector 106 is a paraboloid bowl-shaped structure with a reflective inner wall. The shaped curved mirror 106 has a focus inside, and a light-transmitting hole (or groove) 106a is formed in a sidewall of the shaped curved mirror 106. In the illustrated embodiment, the shaped curved reflector 106 is disposed in an inverted manner, so that the top portion with a narrower diameter faces upward and is provided with a light outlet 106 b. The exit collimator 112 is arranged outside the light exit 106b, and the clear aperture of the exit collimator 112 is not smaller than the diameter of the light exit 106 b.
The wavelength conversion unit 107 is located on the optical axis inside the irregularly-shaped curved reflector 106 and does not exceed the top light outlet 106 b. The wavelength conversion unit 107 includes a luminescent material 107a and a fixed heat dissipation base 107b, a light emitting surface of the luminescent material 107a is not lower than a wide-diameter bottom surface (bowl mouth) of the special-shaped curved surface reflector 106, and the luminescent material 107a is located at a focus of the special-shaped curved surface reflector 106 and also located at an object focus of the exit collimator 112. The exit collimator 112 may be a single lens or a combination of lenses.
The special-shaped plane mirror 108, the stray light eliminating unit 109 and the wavelength conversion unit 107 are all located on the same side of the special-shaped curved surface mirror 106. Wherein, the reflecting plane of the special-shaped plane reflecting mirror 108 is perpendicular to the central optical axis of the special-shaped curved surface reflecting mirror 106, and the reflecting plane of the special-shaped plane reflecting mirror 108 is lower than the light emitting surface of the light emitting material 107 a. The shaped plane mirror 108 can reflect not only laser light for exciting the luminescent material but also fluorescence radiated from the luminescent material 107 a. In this embodiment, the irregular plane mirror 108 is an annular plane mirror, the outer ring size is substantially equal to the bottom aperture of the irregular curved surface mirror, and the inner ring diameter is not greater than the diameter of the light exit 106 b. The upper surface or the lower surface is plated with a metal reflecting film or a dielectric reflecting film.
When the luminescent material 107a is excited by the laser light, the first part of the emitted fluorescence is directly emitted from the opening 106b, and then is collected by the emission collimator 112 and output as parallel light; the second part of the fluorescence emitted from the luminescent material 107a and the part of the laser not absorbed by the luminescent material are emitted to the inner wall of the special-shaped curved reflector 106 and reflected, and the reflected light 110 is parallel to the optical axis of the special-shaped curved reflector, perpendicularly incident on the special-shaped plane reflector 108, reflected by the special-shaped plane reflector 108, and returned to the luminescent material 107a according to the original way. In this way, each cycle increases the light emission amount output from the exit collimator 112, thereby improving the output brightness of the illumination module.
The stray light eliminating unit 109 is located between the reflecting plane of the shaped plane reflecting mirror 108 and the light emitting plane of the light emitting material 107a, and the stray light eliminating unit 109 is arranged at the edge of the shaped plane reflecting mirror 108 with a side surface adjacent to the fixed heat dissipating base unit 107b in the wavelength converting unit. On both sides adjacent to the special-shaped plane mirror 108 and in the direction perpendicular to the reflection plane of the special-shaped plane mirror, the stray light eliminating unit has a light absorbing structure, which includes light absorbing materials, light absorbing coatings or light traps, such as matting varnish, light absorbing sponge, black velvet paper, array black holes, and the like. Due to the non-ideal point luminescence of the luminescent material 107a, and the errors of the device processing and adjusting, during the above reflection cycle, light still leaves the above reflection cycle and becomes the escaping invalid stray light 111. The stray light eliminating unit 109 can absorb the ineffective stray light 111, so that the stray light is prevented from being output from the emergent collimating mirror 112, and the halo of illumination is reduced.
The laser can also be incident from a through hole arranged on the special-shaped plane reflector, the laser light source unit is composed of a laser and a collimating mirror which are positioned below the special-shaped plane reflector, and the light emitted by the laser is collimated, enters from the through hole in a direction vertical to the special-shaped plane reflector, is emitted to the inner wall of the special-shaped curved surface reflector, and is reflected and focused to a light-emitting material. The opening amplitude of the through hole meets the requirement that the direct light column completely passes through the through hole.
Fig. 2 and 3 are schematic structural diagrams of a second embodiment of the laser illumination module according to the present invention, and schematic top-view structural diagrams of the stray light elimination unit and the special-shaped plane mirror thereof. In this embodiment, the special-shaped curved reflector 201 is a paraboloidal bowl-shaped structure with a reflective inner wall, and the special-shaped curved reflector 201 has a focus inside. The same inverse buckle arrangement as the first embodiment, so that the top with narrower diameter faces upward and is provided with a light outlet 201 a. The exit collimator 112 is arranged outside the light exit 201a, and the clear aperture of the exit collimator 112 is not smaller than the diameter of the light exit 201 a.
The wavelength conversion unit 107 is located on the optical axis inside the irregularly-shaped curved reflector 201 and does not exceed the top light outlet 201 a. The wavelength conversion unit 107 includes a luminescent material 107a and a fixed heat dissipation base 107b, a light emitting surface of the luminescent material 107a is not lower than a wide-diameter bottom surface (bowl opening) of the special-shaped curved surface reflector 201, and the luminescent material 107a is located at a focus of the special-shaped curved surface reflector 201 and also located at an object focus of the exit collimator 112. The exit collimator 112 may be a single lens or a combination of lenses.
The special-shaped plane reflector 202, the stray light eliminating unit 109 and the wavelength conversion unit 107 are all positioned on the same side of the special-shaped curved reflector 201. The reflecting plane of the special-shaped plane reflector 202 is perpendicular to the central optical axis of the special-shaped curved surface reflector 201, and the reflecting plane of the special-shaped plane reflector 202 is lower than the light-emitting surface of the light-emitting material 107 a. The shaped plane mirror 202 can reflect not only laser light that excites the luminescent material but also fluorescence radiated from the luminescent material 107 a. In this embodiment, the special-shaped plane mirror 202 is an annular plane mirror, the outer ring size is substantially equal to the bottom aperture of the special-shaped curved surface mirror, and the inner ring diameter is not greater than the diameter of the light outlet 201 a. The upper surface or the lower surface is plated with a metal reflecting film or a dielectric reflecting film. Unlike the foregoing first embodiment, the irregular planar reflecting mirror 202 is internally provided with a through hole 203.
While, as shown in fig. 3, the shaped plane mirror 202 is in the enclosure of the parasitic light unit 109. The special-shaped plane reflector 202 has through hole features in the range of the reflecting plane, including a circular hole 301, an elliptical hole 302, or a rounded rectangular hole 303, and may have one through hole or a plurality of through holes, and may be arranged arbitrarily.
The stray light eliminating unit 109 is located between the reflecting plane of the irregular plane reflecting mirror 202 and the light emitting surface of the light emitting material 107a, and the stray light eliminating unit 109 is arranged at the edge of the irregular plane reflecting mirror 108 with a side surface adjacent to the fixed heat dissipating base unit 107b in the wavelength converting unit. The stray light eliminating unit has light absorbing structure characteristics including light absorbing material, light absorbing coating or light trap, such as matting paint, light absorbing sponge, black velvet paper, array black holes, etc., at two sides adjacent to the special-shaped plane mirror 202 and in the direction perpendicular to the reflecting plane of the special-shaped plane mirror. The function of the stray light eliminating unit 109 and the obtained effect are the same as those of the first embodiment, and thus the detailed description is omitted.
In this embodiment, the laser 101 and the collimating mirror 102 are located below the special-shaped plane mirror 202, divergent light emitted by the laser is collimated by the collimating mirror, output parallel light beams are incident perpendicular to a through hole 203 formed in the special-shaped plane mirror, and after reaching the inner wall of the special-shaped curved surface mirror 201, the light beams are reflected by the special-shaped curved surface mirror 201 and focused on the light emitting material unit 107a, so as to excite the material to emit light. The first part of the emitted fluorescence is directly emitted from the opening 201a, collected by the exit collimator 112, and then output as parallel light. And the other second part of the fluorescence and the part of the laser which is not absorbed by the luminescent material are emitted to the inner wall of the special-shaped curved surface reflector 201 and reflected, the reflected light is parallel to the optical axis of the special-shaped curved surface reflector and vertically incident on the special-shaped plane reflector 202, the light is reflected by the special-shaped plane reflector 202 and returns to the luminescent material unit 107a according to the original path, and the light quantity output from the emergent collimating mirror 112 is increased in each circulation in such a way, so that the output brightness of the lighting module is improved.
In summary, the present invention provides a solution introduction and an embodiment detailed description of a laser lighting module, and the solution has prominent substantive features and remarkable progressiveness: the module utilizes the special-shaped curved surface reflector, the special-shaped plane reflector and the stray light eliminating unit to carry out light emitting range limitation and scattered light circulating reflection re-excitation outside the range on the light emitting material, so that the light source utilization efficiency and the output brightness are improved, stray light dissipation is effectively restrained, and the lighting halo phenomenon is reduced.
The above description is only a part of the preferred embodiments of the present invention, and not intended to limit the scope of the present invention, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the present invention.
Claims (8)
1. The utility model provides a laser lighting module, by laser light source unit, excited radiant fluorescence's wavelength conversion unit and emergent collimating mirror constitute which characterized in that: a special-shaped curved surface reflector is arranged between the wavelength conversion unit and the emergent collimating mirror, and a stray light eliminating unit and a special-shaped plane reflector are integrally connected with the special-shaped curved surface reflector at the position lower than the light emitting surface of the wavelength conversion unit; the special-shaped curved surface reflector is a paraboloid bowl-shaped body with a reflective inner wall, a light outlet is formed in the top of the narrow diameter, and the outer side of the light outlet is opposite to the emergent collimating mirror in a spaced mode;
the wavelength conversion unit is provided with a luminescent material positioned at the focus of the special-shaped curved surface reflector and the focus of the object space of the emergent collimating mirror, and the light emitting surface of the luminescent material is flush with or higher than the wide-diameter bottom surface of the special-shaped curved surface reflector;
the laser light source unit emits laser light, which is focused and projected to the luminescent material and excites radiation fluorescence;
the reflecting plane of the special-shaped plane reflector is vertical to the central optical axis of the special-shaped curved surface reflector, and the reflecting plane is lower than the wide-diameter bottom surface;
the stray light eliminating unit is arranged at the side profile of the special-shaped plane reflector between the reflecting plane and the light emitting surface and is vertical to the reflecting plane.
2. The laser lighting module of claim 1, wherein: the laser is incident from a light hole formed in the side wall of the special-shaped curved surface reflector, the laser light source unit is composed of a laser, a collimating mirror, a first reflector, a focusing mirror and a second reflector, light emitted by the laser is projected to a light-emitting material through collimation, reflection, focusing and re-reflection, the inclination angle of the second reflector corresponds to the emergent light axis and penetrates through the light hole and directly points to the light-emitting material, and the opening range of the light hole meets the requirement that a focused and re-reflected light beam completely passes through the light hole.
3. The laser lighting module of claim 1, wherein: the laser is incident from a through hole arranged on the special-shaped plane reflector, the laser light source unit is composed of a laser and a collimating mirror which are positioned below the special-shaped plane reflector, and the light emitted by the laser is collimated, enters from the through hole in a direction perpendicular to the special-shaped plane reflector, is emitted to the inner wall of the special-shaped curved surface reflector, is reflected and focused to a light-emitting material.
4. The laser lighting module of claim 1, wherein: the clear aperture of the emergent collimating mirror is equal to or larger than the diameter of the light outlet of the special-shaped curved surface reflector.
5. The laser lighting module of claim 1 or 4, wherein: the emergent collimating lens is a single lens or a lens group.
6. The laser lighting module of claim 1, wherein: the wavelength conversion unit comprises a fixed heat dissipation base and a luminescent material positioned on the surface of the fixed heat dissipation base, the wavelength of fluorescence radiated by excitation is different from the wavelength of laser, and the periphery of the fixed heat dissipation base is connected with the special-shaped plane reflector into a whole through the stray light eliminating unit.
7. The laser lighting module of claim 1, wherein: the fluorescence light-emitting angle radiated by excitation is close to 180 degrees, and one part of fluorescence directly emits from the light-emitting port and is collected and collimated by the emergent collimating mirror to be parallel light output, and the other part of fluorescence emits to the inner wall of the special-shaped curved surface reflector and is circularly reflected among the special-shaped curved surface reflector, the special-shaped plane reflector and the light-emitting material.
8. The laser lighting module of claim 1, wherein: the stray light eliminating unit is at least provided with a flatting paint coating, a light absorbing sponge, black napped paper or an array black hole.
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| CN207233768U (en) * | 2017-05-08 | 2018-04-13 | 深圳市瑞丰光电子股份有限公司 | A kind of LED encapsulation structure based on refraction-reflection lens |
| CN108332076A (en) * | 2018-02-09 | 2018-07-27 | 超视界激光科技（苏州）有限公司 | High brightness laser illumination module |
| CN110360473A (en) * | 2019-08-20 | 2019-10-22 | 苏州晶清光电科技有限公司 | A kind of laser lighting lamp |
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