CN211403089U - Laser light source module - Google Patents
Laser light source module Download PDFInfo
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- CN211403089U CN211403089U CN202020219229.5U CN202020219229U CN211403089U CN 211403089 U CN211403089 U CN 211403089U CN 202020219229 U CN202020219229 U CN 202020219229U CN 211403089 U CN211403089 U CN 211403089U
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Abstract
The application discloses laser light source module includes: the light source comprises a blue laser diode, a collimation focusing lens group, a diffusion plate and a reflector group which are sequentially arranged, wherein the center lines of the blue laser diode, the collimation focusing lens group and the diffusion plate are overlapped, and the reflector group is used for emitting light rays which are collimated and focused by the blue laser diode, the collimation focusing lens group and the diffusion plate to a first coupling lens; the first coupling lens is used for gathering the emitted light onto the fluorescent sheet so that the fluorescent light excited by the fluorescent sheet is transmitted to the second coupling lens after passing through the first coupling lens and the reflector group in sequence; the second coupling lens is used for collimating the fluorescence to obtain a white light beam. The light source solves the technical problem that the existing LED light source is difficult to obtain light beams with small light spots and strong bundling property when the light beams are shaped through an optical system because the divergence angle of the light beams is large and the optical expansion amount of the LED light source is large.
Description
Technical Field
The application belongs to the technical field of laser display, especially relates to a laser light source module.
Background
At present, LED light sources are mostly adopted in the field of common white light illumination, and compared with traditional incandescent lamps and energy-saving lamps, the LED light sources can save electricity by 50-70%; however, in the field of special illumination, the divergence angle of the light beam of the LED light source is relatively large, and the optical expansion of the LED light source is relatively large, so that it is difficult to obtain a light beam with a small light spot and strong convergence when the light beam is shaped by an optical system.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a laser light source module, which shapes and collimates laser generated by a laser light source through an optical module, and solves the technical problem that it is difficult to obtain a light beam with a small spot and strong bundling property when the light beam is shaped by an optical system because the divergence angle of the light beam is large and the etendue of the light beam is large in the conventional LED light source.
The application provides a laser light source module, include:
the light source comprises a blue laser diode, a collimation focusing lens group, a diffusion plate and a reflector group which are sequentially arranged, wherein the center lines of the blue laser diode, the collimation focusing lens group and the diffusion plate are overlapped, and the reflector group is used for emitting light rays which are collimated and focused by the blue laser diode, the collimation focusing lens group and the diffusion plate to a first coupling lens;
the first coupling lens is used for gathering the emitted light onto the fluorescent sheet, so that the fluorescent light excited by the fluorescent sheet is transmitted to the second coupling lens after passing through the first coupling lens and the reflector group in sequence;
the second coupling lens is used for collimating the fluorescence to obtain a white light beam.
Optionally, the mirror group includes a structural body, and a center line of the structural body coincides with a center line of the second coupling lens, and is fixedly connected to the second coupling lens.
Optionally, the mirror group includes a first mirror, and a central line of the first mirror coincides with central lines of the collimating and focusing lens and the first coupling line, respectively, and is inclined at 45 ° to the diffuser plate.
Optionally, the mirror group includes a first mirror and a second mirror perpendicular to each other, and both the first mirror and the second mirror are inclined at 45 ° to the diffuser plate; the central line of the first reflector is respectively superposed with the central lines of the collimating and focusing lenses; the center line of the second mirror coincides with the center line of the first coupling mirror.
Optionally, the optical device further comprises an optical flat plate, wherein the optical flat plate is arranged between the first coupling mirror and the second coupling mirror, and the second reflecting mirror is fixed on the optical flat plate.
Optionally, the laser diode structure further comprises a focusing cylinder, wherein the focusing cylinder is fixed on the structure body and is located below the laser diode.
Optionally, the mirror group includes a first mirror, a second mirror and a third mirror perpendicular to each other, and the first mirror and the third mirror are both inclined at 45 ° to the diffuser plate; the central line of the first reflector is respectively superposed with the central lines of the collimating and focusing lenses; the central line of the second reflector is coincident with the central line of the first coupling mirror; the second mirror is parallel to the third mirror.
Optionally, the fluorescent piece holder is further included, and the fluorescent piece is fixed on the fluorescent piece holder.
Optionally, the fluorescent sheet is a ceramic fluorescent sheet.
Optionally, the lens of the collimating focusing lens group and the first coupling lens have the same surface type.
To sum up, the application provides a laser light source module, includes:
the light source comprises a blue laser diode, a collimation focusing lens group, a diffusion plate and a reflector group which are sequentially arranged, wherein the center lines of the blue laser diode, the collimation focusing lens group and the diffusion plate are overlapped, and the reflector group is used for emitting light rays which are collimated and focused by the blue laser diode, the collimation focusing lens group and the diffusion plate to a first coupling lens;
the first coupling lens is used for gathering the emitted light onto the fluorescent sheet, so that the fluorescent light excited by the fluorescent sheet is transmitted to the second coupling lens after passing through the first coupling lens and the reflector group in sequence;
the second coupling lens is used for collimating the fluorescence to obtain a white light beam.
The application provides a pair of laser light source module, come to carry out collimation focusing to blue laser diode's output beam's divergence angle through the collimation focusing lens group, the light beam after the focus is favorable to subsequent speculum group to carry out miniaturized design, the light beam after the focus passes through the speculum transmission of speculum group after, reach the optical diffusion piece, the optical diffusion piece carries out dodging to the light beam after the reflection, the light beam after the dodging can gather on the fluorescent plate through first coupling lens, in order to arouse the fluorescent plate through this light beam and produce fluorescence, the fluorescence that produces carries out the plastic after passing through second coupling lens again, and obtain the white light beam that the bundling nature is strong after carrying out the collimation. The laser that this application produced to laser source through the optical module that sets up carries out the plastic collimation, has solved current LED light source because of its beam divergence angle is bigger, and the etendue of itself is bigger, consequently hardly obtains the technical problem of the little strong light beam of beaming nature of facula when carrying out the beam shaping through optical system.
Drawings
Fig. 1 is a schematic structural diagram of a laser light source module according to a first embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an optical flat plate according to a first embodiment of a laser light source module provided in the present application;
fig. 3 is a schematic structural diagram of a second embodiment of a laser light source module according to the present application;
fig. 4 is a schematic structural diagram of a third embodiment of a laser light source module according to the present application;
reference numerals: a first structural body 100; a second structural body 200; a focusing cylinder 300; a laser diode 001; a collimating focusing lens group 002; a first mirror 003; a diffusion plate 004; a second mirror 005; a first coupling lens 006; a fluorescent sheet 007; an optical flat plate 008; the second coupling lens 009; a fluorescent sheet holder 010; the third mirror 011.
Detailed Description
The application provides a pair of laser source module, the produced laser of laser source carries out the plastic collimation through the optical module that sets up, has solved current LED light source because of its light beam divergence angle is bigger, and the etendue of itself is bigger, consequently hardly obtains the technical problem of the little strong light beam of bundling of facula when optical system carries out the light beam plastic.
In the field of white light illumination, most of the LED light sources are adopted, but in the special illumination field, such as laser headlamps, field special illumination, underwater illumination and LED light sources, because the optical expansion of the LED light sources is large, illumination light beams with small light spots and strong convergence are difficult to obtain after passing through an optical system.
With the development of a high-power blue laser diode, the yellow fluorescent sheet 007 can be excited by the laser LD to generate yellow fluorescent light, and then the yellow fluorescent light is combined with un-excited blue laser to obtain a white light illumination light source.
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a laser light source module provided in the present application;
the embodiment of the application provides a laser light source module, includes:
the blue laser diode 001, the collimating focusing lens group 002, the diffusion plate 004 and the reflector group are sequentially arranged, the center lines of the blue laser diode 001, the collimating focusing lens group 002 and the diffusion plate 004 are overlapped, and the reflector group is used for emitting light rays collimated and focused by the blue laser diode 001, the collimating focusing lens group 002 and the diffusion plate 004 to the first coupling lens 006;
the first coupling lens 006 is used for focusing the emitted light onto the fluorescent sheet 007, so that the fluorescent light excited by the fluorescent sheet 007 is transmitted to the second coupling lens 009 after passing through the first coupling lens 006 and the reflector set in sequence;
the second coupling lens 009 collimates the fluorescence to obtain a white light beam.
It should be noted that, in this embodiment of the application, the divergence angle of the output light beam of the blue laser diode 001 is collimated and focused by the collimating and focusing lens group 002, the focused light beam is favorable for the miniaturization design of the subsequent reflector group, the focused light beam reaches the optical diffusion sheet after being emitted by the reflector of the reflector group, the optical diffusion sheet homogenizes the reflected light beam, the homogenized light beam can be collected on the fluorescent sheet 007 through the first coupling lens 006 to excite the fluorescent sheet 007 to generate fluorescence through the light beam, the generated fluorescence is shaped after passing through the second coupling lens 009, and a white light beam with strong bundling property is obtained after being collimated. The diffusion half-angle HWHM of the diffusion plate 004 can be controlled between 0.5 ° and 3.5 °, and considering that the homogenization effect is insufficient when the diffusion angle is too small, and the coupling of the rear-end device is not facilitated when the diffusion angle is too large, the coupling efficiency is reduced, and more stray light is generated. The second coupling lens 009 is fixed to the second structural body 200.
Further, the reflector assembly includes a structural body, and a central line of the structural body coincides with a central line of the second coupling lens 009, and is fixedly connected to the second coupling lens 009.
In the defining embodiment of the present application, the first structural body 100 is disposed at the focal point of the second coupling lens 009, and the structural body is directly opposite to the focal point of the second coupling lens 009, so that the light beam output from the second coupling lens 009 can be directly received, and the loss of the light beam on the path can be reduced, thereby obtaining a light beam with strong convergence.
For easy understanding, please refer to fig. 3, which is a schematic structural diagram of a second embodiment of a laser light source module according to an embodiment of the present disclosure;
further, the reflector group includes a first reflector 003, and a central line of the first reflector 003 is respectively overlapped with central lines of the collimating and focusing lens and the first coupling lens 006, and is inclined to the diffuser plate by 45 °.
It should be noted that, the emission end of the blue laser diode 001 is collimated and focused by the collimating and focusing lens group 002, and the collimated and focused light beam is favorable for the subsequent miniaturization design of the first reflector 003, as shown in fig. 3, the center line of the first reflector 003 coincides with the center line of the collimating and focusing lens, the center line of the blue laser diode 001, and the center line of the diffusion plate 004; the center line of the first mirror 003 is also coincident with the center line of the first coupling lens 006 and the center line of the second coupling lens 009. Make the even light behind the light beam through the diffuser plate 004 after the collimation is focused, pass through the reflection of first speculum 003, gather on fluorescence piece 007 through first coupling lens 006 at last to arouse this fluorescence piece 007 to produce fluorescence, produced fluorescence carries out the beam shaping through first coupling lens 006 again, obtains the white light beam that the bundling nature is strong after carrying out the collimation through second coupling lens 009 at last.
Further, the reflector group comprises a first reflector 003 and a second reflector 005 which are perpendicular to each other, and the first reflector 003 and the second reflector 005 are both inclined at an angle of 45 degrees to the diffusion plate; the central line of the first reflector 003 is respectively superposed with the central line of the collimating and focusing lens; the center line of the second mirror 005 coincides with the center line of the first coupling lens 006.
Fig. 1 is a schematic structural diagram of a first embodiment of a laser light source module according to an embodiment of the present disclosure. As can be seen from the figure, the center line of the first reflector 003 coincides with the center line of the diffusion plate 004, the center line of the collimator focusing lens group 002, and the center line of the laser diode 001; and the first reflecting mirror 003 is disposed to be inclined at 45 ° to the diffusion plate 004. And the center line of the second reflective mirror coincides with the center line of the first coupling lens 006 and the center line of the second coupling lens 009, respectively, and is inclined 45 ° to the diffusion plate 004, perpendicular to the first reflective mirror 003. Carry out the collimation through collimation focusing lens group 002 and focus blue laser diode 001's transmitting end, the light beam after the collimation is focused is favorable to follow-up first speculum 003's miniaturized design, after first speculum 003 reflects, make the even light of light beam after the collimation is focused through diffuser plate 004 back, pass through the reflection of second speculum 005, finally through the gathering of first coupling lens 006 on fluorescence piece 007, produce fluorescence in order to arouse this fluorescence piece 007, produced fluorescence carries out the beam shaping through first coupling lens 006 again, obtain the white light beam that the bundling nature is strong after carrying out the collimation through second coupling lens 009.
For easy understanding, please refer to fig. 2, which is a schematic structural diagram of an optical flat plate 008 according to a first embodiment of a laser light source module provided in the present application;
further, the optical flat plate 008 is included, and the optical flat plate 008 is disposed between the first coupling mirror and the second coupling mirror, and the second reflecting mirror 005 is fixed.
It should be noted that the laser light source module provided in the first embodiment of the present application is further provided with an optical flat plate 008, which may be made of glass, and the light emitting with different colors may be obtained by performing a film coating process on the glass surface of the optical flat plate 008. Illustratively, a reverse blue-transparent red-green film system is plated to obtain yellow fluorescence (color temperature: 5700K, color coordinate: x: 0.3279; y: 0.3434), yellow-green fluorescence (color coordinate: x: 0.34; y: 0.62); but not limited to, light of the above two colors; according to the requirements of products, light of various colors can be obtained by blending fluorescent powder, for example, green light can be obtained by adopting the green fluorescent sheet 007, and red light can be obtained by adopting the red fluorescent sheet 007.
Further, the laser focusing device further comprises a focusing cylinder 300, wherein the focusing cylinder 300 is fixed on the structure body and is positioned below the laser diode 001.
The second coupling lens 009 is fixed to the second structure body 200, and the first structure body 100 may move left and right by the focusing cylinder 300 to angularly control the fluorescence emitted from the first structure body 100.
For convenience of connection, please refer to fig. 4, which is a schematic structural diagram of an optical flat plate 008 according to a third embodiment of the laser light source module provided in the present application;
further, the reflector group comprises a first reflector 003, a second reflector 005 and a third reflector 011 which are mutually perpendicular, and the first reflector 003 and the third reflector 011 are both inclined to the diffusion plate by 45 degrees; the central line of the first reflector 003 is respectively superposed with the central line of the collimating and focusing lens; the centre line of the second mirror 005 coincides with the centre line of the first coupling mirror; the second mirror 005 is parallel to the third mirror 011.
As can be seen from the figure, the center line of the first reflecting mirror 003 coincides with the center line of the diffusion plate 004, the center line of the collimator focus lens group 002, and the center line of the laser diode 001; and the first reflecting mirror 003 is disposed to be inclined at 45 ° to the diffusion plate 004. And the center lines of the second reflective mirrors coincide with the center lines of the first coupling lens 006, are inclined 45 ° to the diffusion plate 004, and are perpendicular to the first reflective mirror 003, respectively. The third reflector 011 and the second reflector 005 are arranged in parallel, the center line of the third reflector 011 coincides with the center line of the first coupling lens 006 and the center line of the second coupling lens 009, the emission end of the blue laser diode 001 is collimated and focused through the collimating and focusing lens group 002, the collimated and focused light beam is beneficial to the miniaturization design of the subsequent first reflector 003, after being reflected by the first reflector 003, the collimated and focused light beam is homogenized after passing through the diffusion plate 004, then respectively reflected by the second reflector 005 and the third reflector 011, and finally focused on the fluorescent sheet 007 through the first coupling lens 006 to excite the fluorescent sheet 007 to generate fluorescence, the generated fluorescence is subjected to beam shaping through the first coupling lens 006, and finally collimated through the second coupling lens 009 to obtain a white light beam with strong bundling property.
Further, a fluorescent sheet 007 support is further included, and the fluorescent sheet 007 is fixed on the fluorescent sheet support 010.
It should be noted that the phosphor sheet 007 may be fixed on the phosphor sheet holder 010, or may be sintered on the phosphor sheet 007 holder to facilitate heat dissipation of the phosphor sheet 007. And the fluorescent sheet holder 010 is fixed with the first structure body 100 by a screw lock. The distance between the fluorescent sheet 007 and the first coupling lens 006 can be controlled by adjusting the screw threads, so as to achieve the effect of controlling the emission angle of the fluorescence excitation light. In the embodiment of the present application, the bracket of the phosphor sheet 007 and the first structure body 100 may be integrally formed, and the phosphor sheet 007 may be fixed to the phosphor sheet bracket 010 or may be sintered to the phosphor sheet bracket 010.
Further, the fluorescent sheet 007 is a ceramic fluorescent sheet 007.
It should be noted that the fluorescent sheet 007 in the present application may be a ceramic fluorescent sheet 007, or may be a common glass ceramic sheet, and in order to obtain higher fluorescence excitation efficiency, a metal high-reflection coating treatment may be performed on the lower surface of the ceramic fluorescent sheet 007.
Further, the lenses of the collimating focusing lens group 002 and the first coupling lens 006 have the same surface type.
It should be noted that, the lens of the collimating focusing lens group 002 and the first coupling lens 006 can be designed by using the same surface type lens, so as to reduce the mold opening cost of the lens group; however, the present application is not limited thereto, and the collimating focusing lens group 002 and the first coupling lens 006 may be separately designed and optimized accordingly.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same;
although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A laser light source module, characterized by, includes:
the light source comprises a blue laser diode, a collimation focusing lens group, a diffusion plate and a reflector group which are sequentially arranged, wherein the center lines of the blue laser diode, the collimation focusing lens group and the diffusion plate are overlapped, and the reflector group is used for emitting light rays which are collimated and focused by the blue laser diode, the collimation focusing lens group and the diffusion plate to a first coupling lens;
the first coupling lens is used for gathering the emitted light onto the fluorescent sheet, so that the fluorescent light excited by the fluorescent sheet is transmitted to the second coupling lens after passing through the first coupling lens and the reflector group in sequence;
the second coupling lens is used for collimating the fluorescence to obtain a white light beam.
2. The laser light source module as claimed in claim 1, wherein the reflector assembly includes a structural body, and a central line of the structural body coincides with a central line of the second coupling lens and is fixedly connected to the second coupling lens.
3. The laser light source module as claimed in claim 1, wherein the reflector group comprises a first reflector, and a central line of the first reflector coincides with a central line of the collimating and focusing lens and a central line of the first coupling line, respectively, and is inclined to the diffuser plate by 45 °.
4. The laser light source module as claimed in claim 2, wherein the reflector set comprises a first reflector and a second reflector perpendicular to each other, and the first reflector and the second reflector are both inclined at 45 ° to the diffuser plate; the central line of the first reflector is respectively superposed with the central lines of the collimating and focusing lenses; the center line of the second mirror coincides with the center line of the first coupling mirror.
5. The laser light source module as claimed in claim 4, further comprising an optical plate disposed between the first coupling mirror and the second coupling mirror, and fixed with the second reflecting mirror.
6. The laser light source module as claimed in claim 4, further comprising a focusing cylinder fixed to the structural body and located below the laser diode.
7. The laser light source module as claimed in claim 1, wherein the reflector set comprises a first reflector, a second reflector and a third reflector perpendicular to each other, and the first reflector and the third reflector are both inclined at 45 ° to the diffuser plate; the central line of the first reflector is respectively superposed with the central lines of the collimating and focusing lenses; the central line of the second reflector is coincident with the central line of the first coupling mirror; the second mirror is parallel to the third mirror.
8. The laser light source module as claimed in claim 1, further comprising a fluorescent sheet holder, wherein the fluorescent sheet is fixed on the fluorescent sheet holder.
9. The laser light source module as claimed in claim 1, wherein the fluorescent sheet is a ceramic fluorescent sheet or a glass fluorescent sheet.
10. The laser light source module as claimed in claim 1, wherein the lens of the collimating and focusing lens group and the first coupling lens have the same surface type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020219229.5U CN211403089U (en) | 2020-02-27 | 2020-02-27 | Laser light source module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020219229.5U CN211403089U (en) | 2020-02-27 | 2020-02-27 | Laser light source module |
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| CN211403089U true CN211403089U (en) | 2020-09-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314953A (en) * | 2021-05-20 | 2021-08-27 | 巴可伟视(北京)电子有限公司 | Self-focusing semiconductor laser light source system |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314953A (en) * | 2021-05-20 | 2021-08-27 | 巴可伟视(北京)电子有限公司 | Self-focusing semiconductor laser light source system |
| CN113314953B (en) * | 2021-05-20 | 2022-07-01 | 巴可伟视(北京)电子有限公司 | Self-focusing semiconductor laser light source system |
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