CN215372109U - White light laser illumination light source - Google Patents
White light laser illumination light source Download PDFInfo
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- CN215372109U CN215372109U CN202120791944.0U CN202120791944U CN215372109U CN 215372109 U CN215372109 U CN 215372109U CN 202120791944 U CN202120791944 U CN 202120791944U CN 215372109 U CN215372109 U CN 215372109U
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Abstract
The utility model discloses a white light laser illumination light source, wherein a yellow fluorescent material layer with a certain thickness is arranged in an inner cavity of a waveguide tube, an inner tube is also arranged in the inner cavity of the waveguide tube, and the fluorescent material layer is positioned between the outer wall of the inner tube and the inner wall of the waveguide tube; in the utility model, because the light source devices are integrated into a tube, a complex structure of dynamic rotation is not needed, and the device has the advantage of small volume; furthermore, the fluorescent material is coated on the tubular structure, so that the coating contact area is large, the heat dissipation effect is good, the power density of blue-ray pump light is high, the pumping area is large, all light rays generated after pumping are output in a concentrated mode, and the brightness of the output light rays is high; meanwhile, due to the existence of the inner tube, all light rays generated by the LD pumping fluorescent material are transmitted in the waveguide tube, a central hollow hole can be seen when the light rays are observed at the position of the output mirror, and the light rays transmitted out of the waveguide tube are high in brightness and loss is reduced due to the fact that no light rays exist in the center.
Description
Technical Field
The utility model relates to the technical field of medical supplies, in particular to a white light laser illumination light source.
Background
The blue laser is adopted to excite the fluorescent material to generate high-brightness white light, which is the mainstream technology of laser illumination at present; compared with the LED illumination, the laser illumination has higher brightness of the light source, and is particularly suitable for the occasions of remote illumination; in order to increase the brightness of light, the pumping intensity of blue light is required to be increased continuously, and in the process, the pumped fluorescent material such as phosphor, fluorescent ceramic, etc. generates extremely high heat, resulting in a "thermal saturation" effect.
At present, a common method is to coat a rotating device with processes of mixing fluorescent powder and glue and the like, the device is mostly used in a projector, and the method breaks through the pumping intensity of 100W/mm2 at present; and secondly, fluorescent powder, fluorescent ceramic, glue and the like are coated on a metal or sapphire substrate to form a fluorescent film layer, the temperature of the fluorescent material is reduced by reducing the thermal resistance of the fluorescent material and the substrate, and the highest pumping intensity of the method can reach 20W/mm2 at present. However, the first method obtains white light of high brightness by a dynamic method, and although white light of extremely high brightness can be obtained, the volume of the light source is large, and reliability (mainly, impact resistance, minimum temperature, maximum temperature), and the like are limited. In the second method, the brightness of the light source is low, and although the brightness can meet some application occasions, the application requirement of the projector on the brightness cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a white laser illumination light source which has small volume and can obtain white light with high brightness, aiming at the defects and shortcomings of the prior art.
In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a white light laser lighting source, which comprises a blue light LD pump, a waveguide tube, an output mirror and a total reflector, wherein the output mirror and the total reflector are respectively arranged at the upper end part and the lower end part of the waveguide tube, an upper end heat sink and a lower end heat sink are respectively arranged at the output mirror and the total reflector, a reflecting cup and a collimating mirror are sequentially arranged outside the output mirror, the blue light LD pump and the radial side wall of the waveguide tube are oppositely arranged, a yellow light fluorescent material layer with certain thickness is arranged in an inner cavity of the waveguide tube and can cover the inner wall of the waveguide tube, the inner cavity of the waveguide tube is also provided with an inner tube, the fluorescent material layer is positioned between the outer wall of the inner tube and the inner wall of the waveguide tube, the outer wall of the inner tube, the fluorescent material layer and the inner wall of the waveguide tube are sequentially attached and connected, and the outer wall of the waveguide tube is provided with a high-reflecting film, the outer wall surface of the inner tube is a mirror surface polishing structure or a total reflection film is arranged on the outer wall surface of the inner tube.
Preferably, the thickness of the fluorescent material layer is 0.01mm to 0.2 mm.
Preferably, the cross-section of the waveguide is circular, triangular, square or polygonal.
Preferably, the waveguide is made of sapphire, glass with rare earth elements, or other light-transmitting materials with a heat conduction effect.
Preferably, an antireflection film is disposed on the inner surface and/or the outer surface of the waveguide.
Preferably, an all-reflective film is provided on an inner surface or an outer surface of the waveguide.
Preferably, the upper end and the lower end of the waveguide tube are respectively provided with an output mirror and a full-radiation mirror, and the output mirror and the full-radiation mirror are respectively provided with an upper end heat sink and a lower end heat sink.
Preferably, the number of the arrangement of the LD pumps is at least 1.
Compared with the prior art, the utility model has the following beneficial effects:
1. in the white light laser illumination light source provided by the utility model, because the light source devices are integrated into a tube, a complex structure of dynamic rotation is not needed, and therefore, compared with the traditional dynamic rotation structure, the white light laser illumination light source has the advantage of small volume; furthermore, as the fluorescent material is coated on the tubular structure, the coating contact area is large, the heat dissipation effect is good, and the power density of blue-ray pump light is high, compared with the traditional flat coating structure, the fluorescent material has the advantages that the pumping area is large, all light rays generated after pumping are output in a concentrated manner, and the brightness of the output light rays is high; meanwhile, due to the existence of the inner tube, all light rays generated by the LD pumping fluorescent material are transmitted in the waveguide tube, a central cavity can be seen when the light rays output by the outer waveguide structure are observed at the position of the output mirror, and the light rays transmitted out of the waveguide tube are high in brightness and loss is reduced because the center of the light rays does not exist.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments 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 those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of the overall structure of a white light laser illumination source of the present invention;
FIG. 2 is an optical schematic of FIG. 1;
the device comprises a waveguide tube 1, a fluorescent material layer 2, a heat sink at the upper end 3, an output mirror 4, a pump 5LD, a heat sink at the lower end 6, a total reflector 7, a reflecting cup 8, a collimating mirror 9 and an inner tube 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model aims to provide a white laser illumination light source which has small volume and can obtain white light with high brightness, aiming at the defects and shortcomings of the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, the present invention provides a white light laser lighting source, which comprises a blue light LD pump 5, a waveguide tube 1, and an output mirror 4 and a total reflector 7 respectively disposed at the upper and lower end portions of the waveguide tube 1, wherein the output mirror 4 and the total reflector are respectively provided with an upper end heat sink 3 and a lower end heat sink 6, a reflective cup 8 and a collimating mirror 9 are sequentially disposed outside the output mirror 4, the blue light LD pump 5 and the radial sidewall of the waveguide tube 1 are oppositely disposed, a yellow light fluorescent material layer 2 with a certain thickness is disposed in the inner cavity of the waveguide tube 1, the yellow light fluorescent material layer 2 can cover the inner wall of the waveguide tube 1, the inner cavity of the waveguide tube 1 is further provided with an inner tube 10, the fluorescent material layer 2 is located between the outer wall of the inner tube 10 and the inner wall of the waveguide tube 1, the outer wall of the inner tube 10, the fluorescent material layer 2 and the inner wall of the waveguide tube 1 are sequentially attached, and a high reflective film is disposed on the outer wall of the waveguide tube 1, the outer wall surface of the inner tube 10 is a mirror-finished structure or a total reflection film is arranged on the outer wall surface of the inner tube 10;
the waveguide 1 is a transparent, tubular optical element, whose cross section may be circular, triangular, square, polygonal, etc., and whose material may be sapphire, or glass, or other transparent material, and its main function is: the thickness of the fluorescent material layer 2 is generally 0.01mm to 0.20mm, and the fluorescent material layer 2 may be formed by gluing, spraying, magnetron sputtering, or the like. The waveguide 1 can provide a certain heat conduction effect for the fluorescent material, so the waveguide 1 is generally sapphire and has a certain heat conductivity; but the glass can be doped with certain rare earth elements or other transparent materials with certain heat conduction effect; that is, the higher the thermal conductivity, the better, otherwise the damage of the fluorescent material is easily caused, generally the thermal conductivity is not less than 0.1W/mk; it should be noted that, when the inner tube 10 is made of a material with a good thermal conductivity, the heat of the fluorescent material can be conducted away from the inner tube 10 or dissipated, so that the thermal conductivity of the material of the waveguide 1 is not required. When the inner tube 10 is made of a material with poor thermal conductivity, the waveguide 1 generally needs to be made of a material with good thermal conductivity, i.e. a material with thermal conductivity > 0.1W/mk.
In the process of generating white light, light emitted by the blue LD pump 5 can penetrate through the waveguide 1 and impinge on the fluorescent material layer 2, so that yellow light is generated; the blue light pumping the fluorescent material to generate yellow light is a process of stimulated luminescence; while the blue light pump generates yellow light, the yellow light is mixed with the rest blue light, and a white light effect is generated due to the superposition effect of the light waves.
Further, the inner and outer surfaces of the waveguide 1 are coated with antireflection films, for example, 455nm, and only one surface is coated with the antireflection film, or neither is coated, only for the effect of efficiency.
Furthermore, one of the inner surface and the outer surface of the waveguide tube 1 is plated with a 500-700 nm total reflection film; the two surfaces can be not coated with films, but the emitted light is weak, namely the light effect loss is large; the inner surface and the outer surface are coated with films, the significance is not great, 1 surface is mainly used, but the inner surface and the outer surface are coated with films, and the cost is only increased.
The fluorescent material in the fluorescent material layer 2 is a material excited by light, and when white light is obtained, the material is a yellow fluorescent material. In practical application, the blue light pump yellow light material is not limited to obtain white light; other wavelengths of pump light and other color materials can be pumped to obtain other color lights.
Wherein, the LD pump 5 is a laser diode, and for obtaining white light output, an LD with a wavelength of 455nm is needed to pump yellow fluorescent material; however, if other color light output is to be obtained, the wavelength and fluorescent material of the LD can be adjusted accordingly.
The upper end heat sink 3 is an existing mechanical processing piece made of copper, aluminum, even silver, gold and the like, is not important in the patent, and mainly functions to connect and bear the waveguide 1 and the output mirror 4 and provide heat conduction and certain heat dissipation for the waveguide 1.
The output mirror 4 is an existing optical element, and the material may be K9, BK7, or the like, which is not the main point of the patent, and is mainly used for converging and outputting the light emitted from the waveguide 1.
The lower end heat sink 6 is also a mechanical processing part, and is mainly used for connecting and bearing the waveguide 1 and the total reflection mirror 7, and providing heat conduction and certain heat dissipation for the waveguide 1.
The total reflection mirror 7 is an optical element, can be made of glass or aluminum, and can be coated with a film, generally, the upper surface of the total reflection mirror is coated with a total reflection film, the total reflection film is 400-700 nm total reflection, and the total reflection mirror can be made into a mirror surface to reflect all wavelengths.
The reflecting cup 8 is an optical element, which can be made of metal such as aluminum and stainless steel, or nonmetal such as glass and plastic, and is mainly characterized in that the reflecting surface of the curved surface is coated with a full-reflecting film or polished to a mirror surface, and the polishing degree only affects the quantity of the reflected light rays and does not affect the function realization. The main function of the reflector 8 is to collect the edge light emitted from the output mirror 4 and make it enter the collimating mirror 9, so as to improve the utilization rate of the light and further improve the brightness of the output light.
The collimator lens 9 is an optical element, and the material of the optical element can be glass or transparent plastic. The main function is to converge the light reflected by the reflecting cup 8 and the light emitted by the output mirror 4 into parallel-like light and output the parallel-like light. The upper and lower surfaces of the collimating mirror 9 may be coated with visible light antireflection film or not, and the brightness of the output light is reduced without affecting the function. Additionally, both the output mirror 4 and the collimating mirror 9 can be aspheric lenses or spherical lenses, which have good imaging effect and light converging effect, but have poor spherical performance, but can also realize functions.
The inner tube 10 is an optical element, and the material may be metal or nonmetal, and the shape may be tubular or rod-like. The cross section of the material can be circular or polygonal, and is preferably circular. The inner tube 10 has the main functions of reflecting yellow light emitted from the fluorescent material, reflecting blue light of the LD, and reflecting internal refraction and reflection light; the outer wall of the inner tube 10 is plated with a full-reflection film or polished to a mirror surface, and the polishing degree affects the light loss degree and does not affect the function realization. On the other hand, the inner tube 10 may provide some heat conduction and dissipation for the fluorescent material, as described in the waveguide 1. More preferably, the waveguide 1 and the inner tube 10 have certain thermal conductivity, and the fluorescent material is coated on the outer wall of the inner tube 10, and the inner tube 10 is made of a metal material with good thermal conductivity, and the outer wall is polished or coated with a full-reflection film.
In the present invention, the arrangement number of the LD pumps 5 is at least 1, and the number of the LD pumps 5 may be 1, and in practical application, there may be a plurality of LD pumps, for example, 1 LD pump is placed in each of four directions around, or the waveguide 11 is made long, and a plurality of LD pumps are arranged side by side in the same direction, and a specific manner is not limited.
The utility model adopts specific examples to explain the principle and the implementation mode of the utility model, and the description of the above embodiments is only used for helping to understand the multifunctional wheelchair and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (8)
1. A white light laser lighting source is characterized by comprising a blue light LD pump, a waveguide tube, an output mirror and a total reflector, wherein the output mirror and the total reflector are respectively arranged at the upper end part and the lower end part of the waveguide tube, an upper end heat sink and a lower end heat sink are respectively arranged at the output mirror and the total reflector, a reflecting cup and a collimating mirror are sequentially arranged outside the output mirror, the blue light LD pump and the radial side wall of the waveguide tube are oppositely arranged, a yellow light fluorescent material layer with a certain thickness is arranged in an inner cavity of the waveguide tube and can cover the inner wall of the waveguide tube, the inner cavity of the waveguide tube is further provided with an inner tube, the fluorescent material layer is positioned between the outer wall of the inner tube and the inner wall of the waveguide tube, the outer wall of the inner tube, the fluorescent material layer and the inner wall of the waveguide tube are sequentially attached and connected, and the outer wall of the waveguide tube is provided with a high reflection film, the outer wall surface of the inner tube is a mirror surface polishing structure or a total reflection film is arranged on the outer wall surface of the inner tube.
2. The white light laser illumination source of claim 1, wherein the yellow fluorescent material layer has a thickness of 0.01mm to 0.2 mm.
3. The white laser illumination source of claim 2, wherein the waveguide has a circular, triangular, square, or polygonal cross-section.
4. The white light laser illumination source of claim 3, wherein the waveguide is made of sapphire, glass with rare earth elements, or other transparent materials with heat conduction effect.
5. The white laser illumination source of claim 4, wherein an antireflection film is provided on the inner surface and/or the outer surface of the waveguide.
6. The white laser illumination source of claim 5, wherein the waveguide is provided with an all-reflective film on an inner surface or an outer surface thereof.
7. The white laser illumination source of claim 6, wherein the upper and lower ends of the waveguide are respectively provided with an output mirror and a total reflection mirror.
8. The white laser illumination light source of any one of claims 1 to 7, wherein the number of the LD pumps is at least 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120791944.0U CN215372109U (en) | 2021-04-19 | 2021-04-19 | White light laser illumination light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120791944.0U CN215372109U (en) | 2021-04-19 | 2021-04-19 | White light laser illumination light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215372109U true CN215372109U (en) | 2021-12-31 |
Family
ID=79627199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120791944.0U Expired - Fee Related CN215372109U (en) | 2021-04-19 | 2021-04-19 | White light laser illumination light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215372109U (en) |
-
2021
- 2021-04-19 CN CN202120791944.0U patent/CN215372109U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |