CN115164129A - Laser lighting structure - Google Patents

Laser lighting structure Download PDF

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Publication number
CN115164129A
CN115164129A CN202210766993.8A CN202210766993A CN115164129A CN 115164129 A CN115164129 A CN 115164129A CN 202210766993 A CN202210766993 A CN 202210766993A CN 115164129 A CN115164129 A CN 115164129A
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CN
China
Prior art keywords
laser
light
ceramic
lens
fluorescent
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Pending
Application number
CN202210766993.8A
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Chinese (zh)
Inventor
张乐
康健
陈东顺
陈士卫
贺凌晨
陈浩
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Jiangsu Xiyi High Tech Materials Industry Technology Research Institute Co ltd
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Jiangsu Xiyi High Tech Materials Industry Technology Research Institute Co ltd
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Priority to CN202210766993.8A priority Critical patent/CN115164129A/en
Publication of CN115164129A publication Critical patent/CN115164129A/en
Pending legal-status Critical Current

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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
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/12—Combinations of only three kinds of elements
    • F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • 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
    • F21V5/048—Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
    • 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
    • F21V5/10—Refractors for light sources comprising photoluminescent material
    • 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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Semiconductor Lasers (AREA)

Abstract

The invention discloses a laser illumination structure, and relates to the technical field of laser illumination. The structure comprises a blue laser, a focusing lens, a reflecting cup, a ceramic assembly and a light homogenizing lens which are sequentially arranged; the cup mouth of the reflecting cup is arranged towards the ceramic assembly, and the cup bottom is provided with a round hole; the ceramic assembly comprises a fluorescent ceramic piece for absorbing laser to convert into white light and a transparent ceramic piece for radiating and transmitting the white light of the light-emitting element, wherein the fluorescent ceramic piece is arranged in the center of the transparent ceramic piece, and the fluorescent ceramic piece and the transparent ceramic piece are combined together through secondary sintering; the laser lighting structure also comprises a heat dissipation substrate for system heat dissipation, wherein the section of the heat dissipation substrate is U-shaped and is respectively connected with the transparent ceramic chip and the blue laser. The invention adopts a transparent fluorescent ceramic 'transmission type + reflection type' packaging form, has higher luminous efficiency and higher reliability and stability.

Description

Laser lighting structure
Technical Field
The invention relates to the technical field of laser illumination, in particular to a laser illumination structure.
Background
The laser illumination is the next generation illumination technology following the white-Light Emitting Diode (LED) illumination technology, and has the significant advantages of environmental protection, energy conservation, high Light efficiency, high efficiency, small volume, and the like. In laser illumination systems, there are mainly two illumination configurations: the first is to project blue laser directly onto the surface of the phosphor, and the white light exits from the other surface of the phosphor, and this white light implementation is called transmission type; alternatively, the phosphor is fixed on a heat sink by a silica gel, blue laser is projected on the surface of the phosphor, and white light generated by fluorescence of the ceramic is still emitted from the incident surface of the blue light, which is called reflective laser illumination. The reflective structure has relatively high light-emitting efficiency, and thus is the best illumination method, and related products such as: fluorescent crystals of Shanghai blue lake Lighting technology, inc., fluorescent powder of Qingdao Kexin Chengning Lighting technology, inc., and the like. The reflective packaging structure adopting the fluorescent powder is characterized in that the fluorescent powder is connected with the glass substrate through silica gel, as shown in figure 1, the reflective packaging structure has the characteristics of novel structural design and high integration level. The blue light excites the fluorescent powder 101, the glass substrate 102 is used for guiding and dissipating heat, and the light emitting bowl 103 reflects light upwards.
However, the current package structure has the following technical problems:
1. the phosphor 101 is connected to the glass substrate 102 by silica gel, and under the excitation of strong laser, the laser irradiation region of the phosphor 101 collects a large amount of heat, and the temperature of the light emitting point thereof is continuously increased. Silica gel has very low thermal conductivity (<1.0Wm -1 K -1 ) Heat cannot be introduced into the glass substrate 102 in time, which may cause carbonization of silica gel or dropping of the phosphor 101.
2. To ensure the light transmittance, the glass substrate 102 is used for packaging design, and at the same time, the glass substrate 102 also serves as a heat dissipation base. However, the thermal conductivity of the glass substrate 102 is not high, and is only 1.0 to 2.0Wm -1 K -1 The heat generated by the phosphor 101 cannot be quickly shared, which causes a decrease in the light emitting performance and carbonization of silica gel, and the temperature of the phosphor 101 increases.
3. Since the phosphor 101 is encapsulated by silica gel and a layer of white gel is coated on the contact surface between the phosphor 101 and the glass substrate 102 to increase the reflection, there is little or no light beam directly above the phosphor 101, resulting in a very uneven spatial distribution of light.
In addition, a reflective laser illumination structure using a fluorescent crystal is also gradually becoming a mainstream trend, however, the fluorescent crystal is an opaque material, and only reflected light beams can be utilized, and the rest of light beams are limited in the fluorescent crystal, so that the light emitting efficiency is further improved.
Disclosure of Invention
In view of this, the invention discloses a laser illumination structure, which adopts a transparent fluorescent ceramic 'transmission type + reflection type' packaging form, and has higher luminous efficiency, reliability and stability.
The laser lighting structure comprises a blue laser for emitting blue light, a focusing lens for focusing and collimating the laser light, a reflecting cup for reflecting white light, a ceramic assembly and a light homogenizing lens for homogenizing the white light, which are sequentially arranged; the cup mouth of the reflecting cup faces the ceramic assembly, and the cup bottom is provided with a round hole; the ceramic assembly comprises a fluorescent ceramic piece for absorbing laser conversion to form white light and a transparent ceramic piece for radiating and transmitting the white light of the light-emitting element, wherein the fluorescent ceramic piece is arranged in the center of the transparent ceramic piece, and the fluorescent ceramic piece and the transparent ceramic piece are combined together through secondary sintering; the laser lighting structure also comprises a heat dissipation substrate for system heat dissipation, and the heat dissipation substrate is respectively connected with the transparent ceramic chip and the blue laser; the blue laser emitted by the blue laser passes through a circular hole at the bottom of the reflection cup to reach the fluorescent ceramic wafer after being focused and collimated by the focusing lens, the fluorescent ceramic wafer absorbs the blue laser and converts the blue laser into white light, one part of the white light is transmitted to the light uniformizing lens, the other part of the white light is projected to the reflection cup, the white light is reflected by the reflection cup and then passes through the transparent ceramic wafer to reach the light uniformizing lens, and the white light laser is emitted after being uniformized by the light uniformizing lens.
Preferably, the fluorescent ceramic sheet is Ce-doped YAG (Y) 3 Al 5 O 12 ) Or LuAG (Lu) 3 Al 5 O 12 ) The Ce doping concentration is 0.1-1.0 at.%, and the transmittance at 555nm is 79.0-81.0%.
Preferably, the transparent ceramic sheet is YAG (Y) 3 Al 5 O 12 ) Or LuAG (Lu) 3 Al 5 O 12 ) And a transmittance at 555nm of 79.0 to 81.0%.
Preferably, the output wavelength of the blue laser is 450nm, the output power of the blue light is 5.0-10.0W, the light beam emitted by the dodging lens has the luminous efficiency of 175-200 lm/W and the luminous flux of 1000-1750 lm.
Preferably, the focusing lens is an aspheric lens or a cylindrical lens.
Preferably, the radius of the circular hole at the bottom of the reflecting cup is 0.1-1.0 mm; the surface reflectivity is 95.0-99.0%.
Preferably, the dodging lens is one of a fresnel lens and a graded index lens.
Preferably, the section of the heat dissipation substrate is U-shaped and is made of metal aluminum or red copper.
Preferably, the ceramic assembly is prepared by the steps of:
the method comprises the following steps: and sintering to prepare the fluorescent ceramic sheet.
S1-1, dry-pressing the fluorescent ceramic powder into a mold with the diameter of 20mm to form a biscuit.
S1-2, sintering the biscuit at 1780-1820 ℃ for 12-24 h.
S1-3, cutting and polishing to obtain a final area of 1.0-9.0 mm 2 The thickness is 0.6-1.0 mm.
Step two: sintering to prepare the ceramic assembly.
S2-1, placing the fluorescent ceramic wafer prepared in the step one in the center of a mold with the diameter of 20mm, then pouring transparent ceramic powder, and performing dry pressing to form a biscuit.
S2-2, sintering the biscuit at 1780-1820 ℃ for 12-24 h.
And S2-3, polishing the obtained transparent ceramic plate with the fluorescent ceramic plate inside to obtain the final thickness of 0.6-1.0 mm.
Compared with the prior art, the laser lighting structure disclosed by the invention has the advantages that:
(1) Aiming at the blue light power of 5.0-10.0W, the invention adopts a transparent fluorescent ceramic 'transmission type + reflection type' packaging form, and has higher luminous efficiency.
(2) The invention adopts a mode of sintering and fixing the transparent ceramic and the transparent fluorescent ceramic, can effectively avoid carbonization or shedding phenomenon, and has higher reliability and stability.
(3) The invention adopts the fluorescent ceramic with high thermal conductivity and the transparent ceramic to replace the prior glass substrate, thereby obviously improving the heat dissipation performance of the lighting system.
Drawings
For a clearer explanation of the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for a person skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a light path diagram of a laser illumination light source in the prior art.
Fig. 2 is a schematic view of a laser illumination structure disclosed in the present invention.
Fig. 3 is a light path diagram of a laser illumination structure disclosed by the invention.
In the figure: 101-fluorescent powder; 102-a glass substrate; 103-a light reflecting bowl; 1-blue laser; 2-a focusing lens; 3-a light-reflecting cup; 4-fluorescent ceramic plate; 5-transparent ceramic plate; 6-a heat dissipation substrate; 7-dodging lens.
Detailed Description
The following provides a brief description of embodiments of the present invention in connection with the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any inventive work belong to the protection scope of the present invention.
Fig. 2 and 3 show the preferred embodiment of the present invention, which is parsed in detail from different perspectives, respectively.
Example 1
A laser illumination structure as shown in fig. 2 comprises a blue laser 1, a focusing lens 2, a reflecting cup 3, a dodging lens 7, a heat dissipation substrate 6 and a ceramic assembly.
The blue laser 1 is used for emitting blue light, the output wavelength is 450nm, and the output power of the blue light is 5.0W.
The focusing lens 2 is an aspheric lens for focusing and collimating the laser light.
The reflecting cup 3 is used for reflecting white light, the cup opening faces the ceramic assembly, and a circular hole with the radius of 0.1mm is formed in the cup bottom; the surface reflectance was 95.0%.
The light uniformizing lens 7 is a fresnel lens for uniformizing white light.
The heat dissipation substrate 6 is made of metal aluminum and used for dissipating heat of the system. The section of the heat dissipation substrate 6 is U-shaped, the heat dissipation substrate is respectively connected with the transparent ceramic chip 5 and the blue laser 1, and the fluorescent ceramic chip 4 and the blue laser 1 share the heat dissipation substrate 6.
The ceramic assembly comprises a fluorescent ceramic sheet 4 for absorbing laser light and converting to form white light, and a transparent ceramic sheet for heat dissipation and white light transmission of the light emitting element5, the fluorescent ceramic plate 4 is a circular central part, the transparent ceramic plate 5 is an annular edge wrapping part, the fluorescent ceramic plate 4 is arranged at the center of the transparent ceramic plate 5, and the fluorescent ceramic plate and the transparent ceramic plate are prepared by adopting a secondary sintering method. The fluorescent ceramic plate 4 is Ce-doped YAG (Y) 3 Al 5 O 12 ) The Ce doping concentration was 0.1at.%, and the transmittance at 555nm was 79.0%. The transparent ceramic plate 5 is YAG (Y) 3 Al 5 O 12 ) The transmittance at 555nm was 79.0%.
The preparation of the ceramic assembly comprises the following steps:
the method comprises the following steps: and sintering to prepare the fluorescent ceramic plate 4.
S1-1, dry-pressing the fluorescent ceramic powder into a mold with the diameter of 20mm to form a biscuit.
S1-2, sintering the biscuit at 1780 ℃ for 12h.
S1-3, cutting and polishing to obtain a final area of 1.0mm 2 The thickness is 1.0mm.
Step two: sintering to prepare the ceramic assembly.
S2-1, placing the fluorescent ceramic plate 4 prepared in the step one in the center of a mold with the diameter of 20mm, then pouring transparent ceramic powder, and performing dry pressing to form a biscuit.
S2-2, sintering the biscuit at 1780 ℃ for 12h.
And S2-3, polishing the obtained transparent ceramic plate 5 with the fluorescent ceramic plate 4 inside to obtain the final thickness of 1.0mm.
As shown in fig. 3, when the output wavelength of the blue laser 1 is 450nm and the output power of the blue light is 5.0W, the emitted blue laser passes through the circular hole at the bottom of the reflection cup 3 after being focused and collimated by the focusing lens 2 and reaches the fluorescent ceramic plate 4, the fluorescent ceramic plate 4 absorbs the blue laser and converts the blue laser into white light, one part of the white light is transmitted to the dodging lens 7, the other part of the white light is projected to the reflection cup 3 and passes through the transparent ceramic plate 5 after being reflected by the reflection cup 3 and reaches the dodging lens 7, the white laser is uniformly emitted by the dodging lens 7, and the light beam emitted by the dodging lens 7 has the light emitting efficiency of 200lm/W and the luminous flux of 1000lm.
Example 2
A laser illumination structure as shown in fig. 2 comprises a blue laser 1, a focusing lens 2, a reflecting cup 3, a dodging lens 7, a heat dissipation substrate 6 and a ceramic assembly.
The blue laser 1 is used for emitting blue light, the output wavelength is 450nm, and the output power of the blue light is 10.0W.
The focusing lens 2 is a cylindrical lens for focusing and collimating the laser light.
The reflecting cup 3 is used for reflecting white light, the cup opening faces the ceramic assembly, and a circular hole with the radius of 1.0mm is formed in the cup bottom; the surface reflectance was 99.0%.
The dodging lens 7 is a graded index lens for uniformizing white light.
The heat dissipation substrate 6 is made of red copper and used for dissipating heat of the system. The section of the heat dissipation substrate 6 is U-shaped, the heat dissipation substrate is respectively connected with the transparent ceramic chip 5 and the blue laser 1, and the fluorescent ceramic chip 4 and the blue laser 1 share the heat dissipation substrate 6.
The ceramic assembly comprises a fluorescent ceramic plate 4 for absorbing laser conversion to form white light and a transparent ceramic plate 5 for radiating and transmitting the white light of the light-emitting element, wherein the fluorescent ceramic plate 4 is a circular central part, the transparent ceramic plate 5 is an annular edge-wrapping part, the fluorescent ceramic plate 4 is arranged at the center of the transparent ceramic plate 5, and the fluorescent ceramic plate 4 and the transparent ceramic plate 5 are prepared by adopting a secondary sintering method. The fluorescent ceramic plate 4 is Ce-doped LuAG (Lu) 3 Al 5 O 12 ) The Ce doping concentration was 1.0at.%, and the transmittance at 555nm was 81.0%; the transparent ceramic plate 5 is LuAG (Lu) 3 Al 5 O 12 ) The transmittance at 555nm was 81.0%.
The preparation of the ceramic assembly comprises the following steps:
the method comprises the following steps: and sintering to prepare the fluorescent ceramic plate 4.
S1-1, dry-pressing the fluorescent ceramic powder into a mold with the diameter of 20mm to form a biscuit.
S1-2, sintering the biscuit at 1820 ℃ for 24h.
S1-3, cutting and polishing to obtain a final area of 9.0mm 2 The thickness is 0.6mm.
Step two: sintering to prepare the ceramic assembly.
S2-1, placing the fluorescent ceramic plate 4 prepared in the step one in the center of a mold with the diameter of 20mm, then pouring transparent ceramic powder, and performing dry pressing to form a biscuit.
S2-2, sintering the biscuit at 1820 ℃ for 24h.
And S2-3, polishing the obtained transparent ceramic plate 5 with the fluorescent ceramic plate 4 inside to obtain the final thickness of 0.6mm.
As shown in fig. 3, the output wavelength of the blue laser 1 is 450nm, the output power of the blue light is 10.0W, the emitted blue laser passes through a circular hole at the bottom of the reflection cup 3 after being focused and collimated by the focusing lens 2 and reaches the fluorescent ceramic plate 4, the fluorescent ceramic plate 4 absorbs the blue laser and converts the blue laser into white light, one part of the white light is transmitted to the dodging lens 7, the other part of the white light is projected to the reflection cup 3 and passes through the transparent ceramic plate 5 after being reflected by the reflection cup 3 and reaches the dodging lens 7, the white laser is uniformly emitted by the dodging lens 7, the light beam emitted by the dodging lens 7 has the light emitting efficiency of 175lm/W and the luminous flux of 1750lm. Since the power of the laser is too high, the thermal stability of the ceramic is slightly lowered, and the luminous efficiency is lowered.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A laser lighting structure is characterized by comprising a blue laser (1) for emitting blue light, a focusing lens (2) for focusing and collimating the laser, a reflecting cup (3) for reflecting white light, a ceramic assembly and a dodging lens (7) for homogenizing the white light, which are sequentially arranged; the cup mouth of the light reflecting cup (3) faces the ceramic assembly, and the cup bottom is provided with a circular hole; the ceramic assembly comprises a fluorescent ceramic sheet (4) for absorbing laser conversion to form white light and a transparent ceramic sheet (5) for radiating and transmitting the white light of the light-emitting element, wherein the fluorescent ceramic sheet (4) is arranged in the center of the transparent ceramic sheet (5), and the fluorescent ceramic sheet and the transparent ceramic sheet are combined together through secondary sintering; the laser lighting structure also comprises a heat dissipation substrate (6) for system heat dissipation, wherein the heat dissipation substrate (6) is respectively connected with the transparent ceramic chip (5) and the blue laser (1); blue laser that blue laser ware (1) transmitted passes the round hole of reflection of light cup (3) bottom of cup after the focus of focusing lens (2) and collimation and arrives fluorescent ceramic piece (4), fluorescent ceramic piece (4) absorb blue laser and convert white light into, and partly transmission is to dodging lens (7), and another part throws to reflection of light cup (3), passes transparent ceramic piece (5) after the reflection of light cup (3) and reachs dodging lens (7), and dodging lens (7) are with white light laser even back outgoing.
2. A laser lighting structure according to claim 1, characterized in that the fluorescent ceramic sheet (4) is Ce doped YAG or LuAG, the Ce doping concentration is 0.1-1.0 at.%, and the transmittance at 555nm is 79.0-81.0%.
3. A laser lighting structure according to claim 2, wherein the transparent ceramic sheet (5) is YAG or LuAG, and has a transmittance at 555nm of 79.0-81.0%.
4. A laser lighting structure as claimed in claim 1, wherein the output wavelength of the blue laser (1) is 450nm, the output power of the blue light is 5.0-10.0W, the light beam emitted from the dodging lens (7) has a luminous efficiency of 175-200 lm/W and a luminous flux of 1000-1750 lm.
5. A laser lighting structure according to claim 1, wherein said focusing lens (2) is an aspheric lens or a cylindrical lens.
6. The laser lighting structure as claimed in claim 1, wherein the radius of the circular hole at the bottom of the light reflecting cup (3) is 0.1-1.0 mm; the surface reflectivity is 95.0-99.0%.
7. A laser lighting structure according to claim 1, wherein the dodging lens (7) is one of a fresnel lens and a graded index lens.
8. A laser lighting structure as claimed in claim 1, wherein the heat-dissipating substrate (6) is U-shaped in cross-section and is made of aluminum or copper.
9. A laser illuminated structure according to claim 1, wherein the step of preparing the ceramic assembly comprises:
the method comprises the following steps: sintering to prepare a fluorescent ceramic plate (4);
s1-1, dry-pressing the fluorescent ceramic powder into a mold with the diameter of 20mm to form a biscuit;
s1-2, sintering the biscuit at 1780-1820 ℃ for 12-24 h;
s1-3, cutting and polishing to obtain a final area of 1.0-9.0 mm 2 The thickness is 0.6-1.0 mm;
step two: sintering to prepare a ceramic assembly;
s2-1, placing the fluorescent ceramic plate (4) prepared in the step one into the center of a mold with the diameter of 20mm, then pouring transparent ceramic powder, and performing dry pressing to form a biscuit;
s2-2, sintering the biscuit at 1780-1820 ℃ for 12-24 h;
and S2-3, polishing the obtained transparent ceramic plate (5) containing the fluorescent ceramic plate (4) inside to obtain the final thickness of 0.6-1.0 mm.
CN202210766993.8A 2022-07-01 2022-07-01 Laser lighting structure Pending CN115164129A (en)

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Application Number Priority Date Filing Date Title
CN202210766993.8A CN115164129A (en) 2022-07-01 2022-07-01 Laser lighting structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116217218A (en) * 2022-11-29 2023-06-06 江苏锡沂高新材料产业技术研究院有限公司 Fluorescent ceramic with composite structure and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116217218A (en) * 2022-11-29 2023-06-06 江苏锡沂高新材料产业技术研究院有限公司 Fluorescent ceramic with composite structure and preparation method thereof

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