CN110906281A - Transmission-type laser lighting device based on rod-shaped fluorescent material - Google Patents
Transmission-type laser lighting device based on rod-shaped fluorescent material Download PDFInfo
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- CN110906281A CN110906281A CN201911212271.2A CN201911212271A CN110906281A CN 110906281 A CN110906281 A CN 110906281A CN 201911212271 A CN201911212271 A CN 201911212271A CN 110906281 A CN110906281 A CN 110906281A
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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
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
- F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
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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
- 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
- F21V13/02—Combinations of only two kinds of elements
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Abstract
The invention discloses a transmission-type laser lighting device based on a rod-shaped fluorescent material, which comprises: the device comprises a heat dissipation substrate layer, a laser, a reflecting layer, a fluorescence conversion rod and a diffuse reflection cover; the laser is arranged in the center in the heat dissipation base layer, the upper surface of the heat dissipation base layer is tightly attached to the lower surface of the reflecting layer, the fluorescence conversion rod is vertically arranged above the reflecting layer, the diffuse reflection cover is buckled on the heat dissipation base layer in an inverted mode, the fluorescence conversion rod is located inside the diffuse reflection cover, an upper through hole and a lower through hole are formed in the position, corresponding to the center of the laser, of the reflecting layer, the fluorescence conversion rod is close to the end face of the reflecting layer, a hole with the depth of 1.0-5.0 mm is formed in the end face direction of the reflecting layer, the through hole corresponds to the position of the hole, the diameter of the through hole is the same, and the through hole and the hole are 0.5-5. The invention has simple structure, greatly improves the luminous efficiency of the device, improves the utilization rate of blue light and also improves the luminous efficiency of the system.
Description
Technical Field
The invention relates to the field of laser illumination, in particular to a transmission type laser illumination device based on a rod-shaped fluorescent material.
Background
Laser lighting technology is a new generation of world-level, subversive lighting technology. The obtained light source has the characteristics of good directivity (stronger light penetration capability), high brightness (longer light transmission distance), low divergence angle (higher light coupling capability) and the like, and has more remarkable advantages compared with LED illumination. In addition, the laser light source can be applied to the field of remote illumination and is also suitable for general illumination places by combining more flexible optical design.
Rotating phosphor wheels, single crystals, fluorescent glasses, fluorescent ceramics, etc. are used for laser illumination. All current applications of materials use sheet-like materials. However, in this way, the penetration depth of blue light is small, heat is concentrated in a small area, the thermal focusing temperature of the light conversion material is extremely high, and the doping concentration is high, so that the problems of temperature quenching and concentration quenching are generally existed, and finally luminescence quenching and even failure are caused.
CN206786390U discloses a wavelength conversion device, which adopts a reflective laser illumination structure to obtain high-brightness front light through multiple reflective layers. Although this device will achieve ultra-high brightness, this device will cause significant reflected laser blue spot phenomenon; the transmission type laser lighting structure is simple, but the efficiency is low, and the transmission type laser lighting structure are difficult to be unified.
CN207796611U discloses an optical structure for laser illumination, which employs a tapered light shielding tube, but the focal position is difficult to fix, and the design difficulty of the collimation optical path is great, which is not the best choice in terms of cost and difficulty when it is applied to general illumination.
Disclosure of Invention
The invention aims to provide a transmission type laser lighting device based on a rod-shaped fluorescent material, which has a simple structure and high luminous efficiency and does not generate a laser blue spot phenomenon.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a rod-shaped fluorescent material-based transmissive laser illumination device, comprising: the device comprises a heat dissipation substrate layer, a laser, a reflecting layer, a fluorescence conversion rod and a diffuse reflection cover; the laser is arranged in the center in the heat dissipation base layer, the upper surface of the heat dissipation base layer is tightly attached to the lower surface of the reflecting layer, the fluorescence conversion rod is vertically arranged above the reflecting layer, the diffuse reflection cover is buckled on the heat dissipation base layer in an inverted mode, the fluorescence conversion rod is located inside the diffuse reflection cover, an upper through hole and a lower through hole are formed in the position, corresponding to the center of the laser, of the reflecting layer, the fluorescence conversion rod is close to the end face of the reflecting layer, a hole with the depth of 1.0-5.0 mm is formed in the end face direction of the reflecting layer, the through hole corresponds to the position of the hole, the diameter of the through hole is the same, and the through hole and the hole are 0.5-5.
Preferably, the fluorescence conversion rod is one of a single crystal rod, a fluorescent glass rod and a fluorescent ceramic rod.
Preferably, the fluorescence conversion rod is cylindrical, the radius of the end face of the fluorescence conversion rod is 2.0-10.0 mm, and the length of the fluorescence conversion rod is 10.0-100.0 mm.
Preferably, the fluorescence conversion rod is a Ce: YAG fluorescent material or Ce: LuAG fluorescent material. Wherein the ion for fluorescence conversion is Ce3+Ion, Ce3+The doping concentration of the ions is 0.01-0.1 at.%, and the matrix is YAG or LuAG.
Preferably, the laser is a near ultraviolet laser or a blue laser.
Preferably, the laser is a fiber-coupled or spatially-coupled laser, and the horizontal and vertical divergence angles are both less than 10 °.
Laser beams emitted by the laser are incident to the fluorescence conversion rod through the through holes of the reflecting layer and the holes of the fluorescence conversion rod; the fluorescence conversion rod converts the incident laser into fluorescence in each direction; the reflecting layer reflects most of the fluorescent light beam; the diffuse reflection cover is used for homogenizing the light beam and outputting a high-efficiency light source.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the rod-shaped fluorescent material to replace the sheet-shaped ceramic material, is favorable for solving the problem of low conversion efficiency caused by the thermal quenching and concentration quenching effects of the light conversion material, and greatly improves the luminous efficiency of the device.
2. The invention adopts the mode of opening the hole at the lower end of the rod-shaped fluorescent material, which is beneficial to the entering of blue light, and the reflected blue light and the scattered blue light can be absorbed by the surrounding fluorescent material, thereby improving the utilization rate of the blue light.
3. The reflection layer used in the transmission type does not have the phenomenon similar to blue spots in a reflection type laser illumination structure. The reflective layer is added around the laser, so that the light beam emitted towards the laser is output reversely again, and the luminous efficiency of the system is improved.
4. The invention has simple structure and low manufacturing cost.
Drawings
FIG. 1 is a schematic view of a transmissive laser lighting device based on a rod-shaped fluorescent material according to the present invention;
in the figure, 10 heat sink base layers, 20 lasers, 30 light reflecting layers, 40 fluorescence conversion rods, 50 diffuse reflectors.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Example 1
As shown in fig. 1, a transmissive laser lighting device based on a rod-shaped fluorescent material includes: the substrate comprises a heat dissipation substrate layer 10, a laser 20, a light reflecting layer 30, a fluorescence conversion rod 40 and a diffuse reflection cover 50. Wherein the content of the first and second substances,
the laser 20 is arranged in the center of the heat dissipation substrate layer 10, and the laser 20 is a near ultraviolet laser. The horizontal and vertical divergence angles of the laser 20 coupled by the optical fiber are smaller than 10 degrees, so that all light beams emitted by the laser 20 can enter the fluorescence conversion rod 40 through the through holes and the holes in sequence.
The upper surface of the heat dissipation substrate layer 10 is closely attached to the lower surface of the light reflecting layer 30, the fluorescence conversion rod 40 is vertically arranged above the light reflecting layer 30, and the fluorescence conversion rod 40 is a single crystal rod and is cylindricalThe radius of the end face is 2.0mm, and the length is 10.0 mm; the fluorescence conversion rod 40 is Ce: YAG fluorescent material, and Ce is used as ion for fluorescence conversion3+Ion, Ce3+The doping concentration of the ions is 0.01 at.%, and the matrix is a YAG system.
The diffuse reflection cover 50 is reversely buckled on the heat dissipation base layer 10, the fluorescence conversion rod 40 is located inside the diffuse reflection cover 50, an upper through hole and a lower through hole are formed in the position, corresponding to the center of the laser 20, of the light reflection layer 30, a hole with the depth of 1.0mm is formed in the end face direction, close to the light reflection layer 30, of the fluorescence conversion rod 40, the through holes correspond to the positions of the holes, the diameters of the through holes are the same, and the through holes and the holes are 0.5 mm.
The near ultraviolet laser emits 1W laser beams which enter the single crystal rod through the single crystal rod and the holes of the reflecting layer 30; the single crystal rod converts incident laser into fluorescence in all directions; the light reflecting layer 30 reflects most of the fluorescent light beam; the diffuse reflector 50 serves to homogenize the light beam. The final luminous flux of the device is 150lm, the color temperature is 4400K, the conversion efficiency is 150lm/W, and the high-efficiency light source is suitable for the field of laser illumination.
Example 2
As shown in fig. 1, a transmissive laser lighting device based on a rod-shaped fluorescent material includes: the substrate comprises a heat dissipation substrate layer 10, a laser 20, a light reflecting layer 30, a fluorescence conversion rod 40 and a diffuse reflection cover 50. Wherein the content of the first and second substances,
the laser 20 is disposed at the center in the heat dissipation substrate layer 10, and the laser 20 is a blue laser. The laser 20 is spatially coupled out, and both the horizontal and vertical divergence angles of the laser are smaller than 10 °, so that all light beams emitted by the laser 20 can sequentially enter the fluorescence conversion rod 40 through the through holes and the holes.
The upper surface of the heat dissipation substrate layer 10 is tightly attached to the lower surface of the reflective layer 30, the fluorescence conversion rod 40 is vertically arranged above the reflective layer 30, the fluorescence conversion rod 40 is a fluorescent glass rod and is cylindrical, the radius of the end face of the fluorescence conversion rod is 10.0mm, and the length of the fluorescence conversion rod is 100.0 mm; the fluorescence conversion rod 40 is Ce: the ion for fluorescence conversion is Ce3+Ion, Ce3+The doping concentration of the ions is 0.01 at.%, and the substrate is a LuAG system.
The diffuse reflection cover 50 is reversely buckled on the heat dissipation base layer 10, the fluorescence conversion rod 40 is located inside the diffuse reflection cover 50, an upper through hole and a lower through hole are formed in the position, corresponding to the center of the laser 20, of the light reflection layer 30, a hole with the depth of 5.0mm is formed in the end face direction, close to the light reflection layer 30, of the fluorescence conversion rod 40, the through holes correspond to the positions of the holes, the diameters of the through holes are the same, and the through holes and the holes are 5.0 mm.
Laser beams emitted by the blue laser are incident to the fluorescent glass rod through the fluorescent glass rod and the holes of the reflecting layer 30; the fluorescent glass rod converts the incident laser into fluorescence in all directions; the light reflecting layer 30 reflects most of the fluorescent light beam; the diffuse reflector 50 serves to homogenize the light beam. When the output power of the blue laser is 5W, the final luminous flux of the device is 1250lm, the color temperature is 6250K, the conversion efficiency is 250lm/W, and the high-efficiency light source is suitable for the field of laser illumination.
Example 3
As shown in fig. 1, a transmissive laser lighting device based on a rod-shaped fluorescent material includes: the substrate comprises a heat dissipation substrate layer 10, a laser 20, a light reflecting layer 30, a fluorescence conversion rod 40 and a diffuse reflection cover 50. Wherein the content of the first and second substances,
the laser 20 is disposed at the center in the heat dissipation substrate layer 10, and the laser 20 is a blue laser. The laser 20 is spatially coupled out, and both the horizontal and vertical divergence angles of the laser are smaller than 10 °, so that all light beams emitted by the laser 20 can sequentially enter the fluorescence conversion rod 40 through the through holes and the holes.
The upper surface of the heat dissipation basal layer 10 is tightly attached to the lower surface of the light reflecting layer 30, the fluorescence conversion rod 40 is vertically arranged above the light reflecting layer 30, and the fluorescence conversion rod 40 is a fluorescence ceramic rod and is cylindrical. The radius of the end face is 8.0mm, and the length is 40.0 mm; the fluorescence conversion rod 40 is Ce: YAG transparent fluorescent ceramic, and Ce is used as ion for fluorescence conversion3+Ion, Ce3+The doping concentration of ions is 0.01 at.%, the matrix is YAG system, and the transparent fluorescent ceramic can be formed by dry pressingOr by the preparation process disclosed in patent application CN 108516818A.
The diffuse reflection cover 50 is reversely buckled on the heat dissipation base layer 10, the fluorescence conversion rod 40 is located inside the diffuse reflection cover 50, an upper through hole and a lower through hole are formed in the position, corresponding to the center of the laser 20, of the light reflection layer 30, a hole with the depth of 5.0mm is formed in the end face direction, close to the light reflection layer 30, of the fluorescence conversion rod 40, the through holes correspond to the positions of the holes, the diameters of the through holes are the same, and the through holes and the holes are 2.0 mm.
Laser beams emitted by the blue laser are incident to the ceramic rod through the ceramic rod and the holes of the reflecting layer 30; the ceramic rod converts the incident laser into fluorescence in all directions; the light reflecting layer 30 reflects most of the fluorescent light beam; the diffuse reflector 50 serves to homogenize the light beam. When the output power of the blue laser is 5W, the final luminous flux of the device is 1500lm, the color temperature is 4500K, the conversion efficiency is 300lm/W, and the output high-efficiency light source is suitable for the field of laser illumination.
Example 4
As shown in fig. 1, a transmissive laser lighting device based on a rod-shaped fluorescent material includes: the substrate comprises a heat dissipation substrate layer 10, a laser 20, a light reflecting layer 30, a fluorescence conversion rod 40 and a diffuse reflection cover 50. Wherein the content of the first and second substances,
the laser 20 is disposed at the center in the heat dissipation substrate layer 10, and the laser 20 is a blue laser. The laser 20 is spatially coupled out, and both the horizontal and vertical divergence angles of the laser are smaller than 10 °, so that all light beams emitted by the laser 20 can sequentially enter the fluorescence conversion rod 40 through the through holes and the holes.
The upper surface of the heat dissipation basal layer 10 is tightly attached to the lower surface of the light reflecting layer 30, the fluorescence conversion rod 40 is vertically arranged above the light reflecting layer 30, and the fluorescence conversion rod 40 is a fluorescence ceramic rod and is cylindrical. The radius of the end face is 8.0mm, and the length is 40.0 mm; the fluorescence conversion rod 40 is Ce: YAG transparent fluorescent ceramic, and Ce is used as ion for fluorescence conversion3+Ion, Ce3+The doping concentration of ions is 0.1 at.%, the matrix is YAG system, the transparent fluorescent ceramic can be formed by dry pressing orThe reference is made to the preparation process disclosed in patent application CN 108516818A.
The diffuse reflection cover 50 is reversely buckled on the heat dissipation base layer 10, the fluorescence conversion rod 40 is located inside the diffuse reflection cover 50, an upper through hole and a lower through hole are formed in the position, corresponding to the center of the laser 20, of the light reflection layer 30, a hole with the depth of 5.0mm is formed in the end face direction, close to the light reflection layer 30, of the fluorescence conversion rod 40, the through holes correspond to the positions of the holes, the diameters of the through holes are the same, and the through holes and the holes are 2.0 mm.
Laser beams emitted by the blue laser are incident to the ceramic rod through the ceramic rod and the holes of the reflecting layer 30; the ceramic rod converts the incident laser into fluorescence in all directions; the light reflecting layer 30 reflects most of the fluorescent light beam; the diffuse reflector 50 serves to homogenize the light beam. When the output power of the blue laser is 5W, the final luminous flux of the device is 1200lm, the color temperature is 4400K, the conversion efficiency is 240lm/W, and the output high-efficiency light source is suitable for the field of laser illumination.
Comparative example
Reference patent application CN108516818A to prepare Ce: YAG transparent fluorescent ceramics, Ce3+The doping concentration was 0.50 at%. The transparent fluorescent ceramic is in a disc shape, the diameter of the transparent fluorescent ceramic is 16.0mm, and the thickness of the transparent fluorescent ceramic is 1.0 mm. When the ceramic chip is applied to the invention instead of a fluorescent ceramic rod, when the output power of a blue laser is 5W, the final luminous flux of the device is 1100lm, the color temperature is 4500K, and the conversion efficiency is 220 lm/W. In the unit area of the ceramic wafer, the content of luminescent ions is very high, so that the non-radiative transition rate of ions is increased, the loss of energy in the form of heat energy is increased, and the luminous efficiency is reduced; meanwhile, the flaky ceramic has too strong blue light absorption capacity and more severe thermal quenching behavior, which finally leads to reduction of luminous efficiency. Therefore, when the flaky ceramic and the rod-shaped ceramic with the same color temperature are obtained, the luminous efficiency of the flaky ceramic is obviously lower than that of the rod-shaped ceramic.
Claims (6)
1. A transmission-type laser lighting device based on a rod-shaped fluorescent material, characterized by comprising: the device comprises a heat dissipation substrate layer (10), a laser (20), a light reflecting layer (30), a fluorescence conversion rod (40) and a diffuse reflection cover (50); the laser device (20) is arranged in the heat dissipation base layer (10) in the center, the upper surface of the heat dissipation base layer (10) is tightly attached to the lower surface of the reflection layer (30), the fluorescence conversion rod (40) is vertically arranged above the reflection layer (30), the diffuse reflection cover (50) is buckled on the heat dissipation base layer (10), the fluorescence conversion rod (40) is located inside the diffuse reflection cover (50), an upper through hole and a lower through hole are formed in the position, corresponding to the center of the laser device (20), of the reflection layer (30), the fluorescence conversion rod (40) is close to the end face direction of the reflection layer (30), a hole with the depth of 1.0-5.0 mm is formed in the end face direction of the reflection layer (30), and the through hole corresponds to the position of the hole and is the same in diameter and is 0.5-5.0 mm.
2. The rod-shaped fluorescent material-based transmission laser lighting device as claimed in claim 1, wherein the fluorescent conversion rod (40) is one of a single crystal rod, a fluorescent glass rod and a fluorescent ceramic rod.
3. The transmissive laser illuminator based on rod-shaped fluorescent material of claim 1, wherein the fluorescent conversion rod (40) has a cylindrical shape with a radius of 2.0-10.0 mm at its end face and a length of 10.0-100.0 mm.
4. The transmissive laser illuminator based on rod-shaped fluorescent material of claim 1, wherein the fluorescence conversion rod is formed by using a mixture of Ce: YAG fluorescent material or Ce: LuAG fluorescent material, wherein the ion for fluorescence conversion is Ce3+Ion, Ce3+The doping concentration of the ions is 0.01-0.1 at.%, and the matrix is YAG or LuAG.
5. The rod-shaped fluorescent material-based transmission-type laser lighting device according to claim 1, wherein the laser (20) is a near ultraviolet laser or a blue laser.
6. A rod-shaped fluorescent material-based transmission-type laser lighting device according to claim 1, characterized in that the laser (20) is a fiber-coupled-out or spatially-coupled-out laser, and the horizontal and vertical divergence angles are both smaller than 10 °.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759396A (en) * | 2021-01-20 | 2021-05-07 | 江苏师范大学 | Rod-shaped fluorescent ceramic and preparation method and application thereof |
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