CN219696910U - High-power laser module - Google Patents
High-power laser module Download PDFInfo
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- CN219696910U CN219696910U CN202320945881.9U CN202320945881U CN219696910U CN 219696910 U CN219696910 U CN 219696910U CN 202320945881 U CN202320945881 U CN 202320945881U CN 219696910 U CN219696910 U CN 219696910U
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- 230000003287 optical effect Effects 0.000 claims abstract description 20
- 230000010287 polarization Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Abstract
The utility model belongs to the technical field of laser, and discloses a high-power laser module, which comprises: the LD array is used for generating two parallel emergent beams, and the center-to-center spacing of the emergent beams of adjacent LDs in the same row is not more than 1.5mm; the reflecting mirror is arranged on the light path of the first list of emitted light beams and is used for carrying out primary reflection on the first list of emitted light beams; a wave plate disposed on an optical path of the reflected light beam emitted from the reflecting mirror; a polarizing plate disposed on the optical path of the second incident beam and on the optical path of the transmitted beam exiting from the wave plate; the polarizing plate reflects the second incident light beam and transmits the transmitted light beam emitted from the wave plate; the transmitted light beam emitted from the polaroid sheet is overlapped with the reflected light beam emitted from the polaroid sheet to form an overlapped light beam; and a focusing mirror provided on the optical path of the superimposed light beam emitted from the polarizing plate. The laser module can obtain high-power output and has smaller volume; and the complex debugging process is canceled, and more scenes are adapted.
Description
Technical Field
The utility model belongs to the technical field of laser, and particularly relates to a high-power laser module.
Background
The laser has the characteristics of good directivity, high brightness, good monochromaticity and the like, and is widely applied to the fields of welding, carving, punching, etching, operation, energy sources and the like.
How to arrange the optical path in a limited space, realize high power output and further reduce the volume at the same time is a problem to be solved by the current laser module.
In order TO obtain high-power laser output, the conventional semiconductor laser module generally uses a plurality of TO-packaged LDs, and outputs the laser through a plurality of lenses and mirrors in a space array manner. In particular, multiple reflections via multiple mirrors are required to change the direction of the optical path to achieve high power output. However, the existing laser module has the following disadvantages:
(1) The space occupation caused by the complex light path design makes the volume larger;
(2) The structure is complex, the assembly requirements on the installation angle and the like of components are strict, and the debugging difficulty is high;
(3) The overall light spot size is larger, and the power is lower;
(4) LD array heat dissipation space is limited.
Disclosure of Invention
In order to solve the problems, the utility model provides a high-power laser module which can obtain high-power output and has smaller volume. The specific technical scheme is as follows:
a high power laser module includes:
the LD array is used for generating two parallel emergent beams, and the center-to-center spacing of the emergent beams of adjacent LDs in the same row is not more than 1.5mm;
the reflecting mirror is arranged on the light path of the first list of emitted light beams and is used for carrying out primary reflection on the first list of emitted light beams;
a wave plate disposed on an optical path of the reflected light beam emitted from the reflecting mirror for converting a polarization state of the reflected light beam thereof;
a polarizing plate disposed on the optical path of the second incident beam and on the optical path of the transmitted beam exiting from the wave plate; the polarizer reflects the second incident light beam and transmits the transmitted light beam emitted from the wave plate; the transmitted light beam emitted from the polaroid sheet is overlapped with the reflected light beam emitted from the polaroid sheet to form an overlapped light beam;
and a focusing mirror provided on the optical path of the superimposed light beam emitted from the polarizing plate.
In this scheme, the LD array outputs two outgoing beams: wherein the second list of emitted light beams is reflected by the polarizer; the first list is penetrated the light beam and is reflected through the speculum, then through wave plate transmission, has changed the polarization state, and then through the polarizer transmission for first list is penetrated the light beam and is finally overlapped with the second list and penetrate the light beam, finally gathers through the focusing mirror and send high-power laser beam.
Further, the reflecting mirror, the wave plate, the polaroid and the focusing mirror are coaxially arranged in sequence.
Further, the wave plate is a half wave plate.
Further, the LD array is two columns and four rows.
Further, the distance between the centers of two columns of the LD array is not more than 15mm, and the overall size is not more than 20X 30mm.
Further, the laser module further comprises a relay lens group arranged between the polaroid and the focusing lens, wherein the relay lens group comprises a first lens and a second lens; the first lens is arranged on the light path of the coincident light beam emitted from the polaroid and outputs the coincident light beam as a converging light beam; the second lens outputs the converged light beams emitted by the first lens into parallel light beams, and then the parallel light beams are converged and output through the focusing lens.
Further, the focusing lens is a convex lens.
Further, the first lens, the second lens and the focusing lens are all plano-convex lenses.
Further, the focal length of the first lens is not smaller than the focal length of the second lens.
Compared with the prior art, one or more of the technical schemes can achieve at least one of the following beneficial effects:
(1) Through the type selection design of the LD, the center-to-center distance of two adjacent outgoing beams of each outgoing beam before reflection is ensured to be within a set threshold value, so that each outgoing beam is only required to be reflected once, and the problem that the overlapping beams are reflected by a plurality of reflectors in the prior art is solved; the first listed emission beams reflected by the primary reflecting mirror, transmitted by the wave plate and transmitted by the polaroid are overlapped with the second listed emission beams reflected by the polaroid, so that the high-power laser module has less components and parts, simple structure and greatly reduced overall volume compared with the prior art while obtaining high power output.
(2) Through the use of the relay lens group, the lens debugging tolerance can be increased, so that the complex debugging process of the reflecting mirror and the polaroid is canceled, and the production efficiency is improved; the focusing mirror extends outwards, so that laser can penetrate into an object, flexibility of laser engraving, cutting, welding and the like is improved, and the focusing mirror is suitable for more scenes; the light spot keeps smaller overall size when reaching the focusing mirror, and smaller focusing light spot is obtained; it is possible to ensure a sufficient heat dissipation space of the LD array.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of 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 utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a light path diagram of a high power laser module according to embodiment 1.
Fig. 2 is a schematic diagram of an LD array of embodiment 1.
Fig. 3 is a light path diagram of a high power laser module according to embodiment 2.
In the figure: 1. an LD array; 2. a reflecting mirror; 3. a wave plate; 4. a polarizing plate; 5. a focusing mirror; 6. a first lens; 7. a second lens; l1, a first path of emergent light beam; l2, the second path of emergent light beam.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
The embodiment provides a high-power laser module, which comprises an LD array 1, a reflecting mirror 2, a wave plate 3, a polaroid 4 and a focusing mirror 5.
As shown in fig. 2, the LD array 1 is formed by two columns of multiple rows of LD, two parallel rows of outgoing light beams are generated, and the center-to-center distance D1 of LD outgoing light beams adjacent to the same column in the LD array 1 is not more than 1.5mm. As a preferred embodiment, the LD array 1 is two columns and four rows, and generates eight primarily collimated outgoing beams. The center-to-center distance D2 between two columns of the LD array 1 is not more than 15mm; the overall size is not greater than 20X 30mm. It is understood that one skilled in the art can select the LD array according to the specifications.
As shown in fig. 1, the mirror 2 is disposed on the optical path of the first listed radiation beam; the wave plate 3 is a half wave plate and is arranged on the optical path of the reflected light beam emitted from the reflecting mirror 2 and used for converting the polarization state of the reflected light beam; the polarizing plate 4 is disposed on the optical path of the second incident light beam and on the optical path of the transmitted light beam emitted from the wave plate 3; the polarizing plate reflects the second light beam (S light) and transmits the light beam (P light) of which polarization state is changed, which is emitted from the wave plate; the transmitted light beam emitted from the polarizing plate 4 coincides with the reflected light beam emitted from the polarizing plate 4 to form a coincident light beam; the focusing mirror 5 is provided on the optical path of the superimposed light beam emitted from the polarizing plate 4.
As a preferred embodiment, the reflecting mirror 2, the wave plate 3, the polarizing plate 4 and the focusing mirror 5 are coaxially arranged in order, so that the volume is further reduced.
The light path principle of the high-power laser module will be described below by taking a light path diagram of two outgoing light beams respectively located in two rows and in the same line as an example.
As shown in fig. 1, the second outgoing beam L2 is reflected by the polarizer 4; the first path of outgoing light beam L1 is reflected by the reflecting mirror 2, transmitted by the wave plate 3, converted into the polarization state, transmitted by the polarizing plate 4, overlapped with the reflected light beam of the first path of outgoing light beam L1 passing through the polarizing plate 4, and then output by the focusing mirror 5.
It will be appreciated that the other six paths are similar to the two paths described above, and are not repeated here.
The high-power laser module of the embodiment ensures that the center distance between every two adjacent outgoing beams of each outgoing beam before reflection is within a set threshold value by designing the LD array, so that the two outgoing beams only need one reflection, and the problem that the overlapping beams are realized by multiple reflections in the prior art is solved. The first list of light beams reflected by the primary reflecting mirror, transmitted by the wave plate and transmitted by the polaroid is overlapped with the second list of light beams reflected by the polaroid, so that the high-power laser module has less components and parts, simple structure and greatly reduced overall volume compared with the prior art while obtaining high power output.
Example 2
As shown in fig. 3, the present embodiment is different from embodiment 1 in that the laser module further includes a relay lens group provided between the polarizing plate 4 and the focusing mirror 5, the relay lens group including a first lens 6 and a second lens 7; the first lens 6 is provided on the optical path of the superimposed light beam emitted from the polarizing plate 4, and outputs the superimposed light beam as a condensed light beam; the second lens 7 outputs the converged light beam emitted by the first lens 6 as a parallel light beam, and then converged and output by the focusing lens 5.
In one embodiment, the focusing lens 5, the first lens 6, and the second lens 7 are all plano-convex lenses.
As a preferred embodiment, the focal length of the first lens 6 is not smaller than the focal length of the second lens 7 to further reduce the volume of the lens.
The light path principle of the high-power laser module will be described below by taking a light path diagram of two outgoing light beams respectively located in two rows and in the same line as an example.
The second outgoing beam L2 is reflected by the polaroid 4; the first path of emergent light beam L1 is reflected by the reflecting mirror 2, transmitted by the wave plate 3, after the polarization state is changed, the transmitted light beam emergent from the polarizing plate 4 is overlapped with the reflected light beam of the first path of emergent light beam L1 reflected by the polarizing plate 4, the formed overlapped light beam is converged by the first lens 6, the second lens 7 is output as a parallel light beam, and finally the parallel light beam is converged by the focusing mirror 5 and output.
The high-power laser module of the embodiment can output high-power laser beams while ensuring small volume, increases the debugging tolerance of the reflecting mirror and the polaroid by lengthening the light path through the relay lens group, ensures the output effect only by a structural member, and can keep smaller overall size when the light spot reaches the focusing mirror without repeated debugging, thereby obtaining smaller focusing light spot and overcoming the defect of large debugging difficulty in the prior art; meanwhile, the focusing point can conveniently penetrate into the object, so that the machinability of the object is improved; furthermore, the relay lens group provides a sufficient space for the LD array to dissipate heat.
It is apparent that the above examples are only examples for clearly illustrating the technical solution of the present utility model, and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the protection of the present claims.
Claims (9)
1. A high power laser module, the laser module comprising:
the LD array is used for generating two parallel emergent beams, and the center-to-center spacing of the emergent beams of adjacent LDs in the same row is not more than 1.5mm;
the reflecting mirror is arranged on the light path of the first list of emitted light beams and is used for carrying out primary reflection on the first list of emitted light beams;
a wave plate disposed on an optical path of the reflected light beam emitted from the reflecting mirror for converting a polarization state of the reflected light beam thereof;
a polarizing plate disposed on the optical path of the second incident beam and on the optical path of the transmitted beam exiting from the wave plate; the polarizer reflects the second incident light beam and transmits the transmitted light beam emitted from the wave plate; the transmitted light beam emitted from the polaroid sheet is overlapped with the reflected light beam emitted from the polaroid sheet to form an overlapped light beam;
and a focusing mirror provided on the optical path of the superimposed light beam emitted from the polarizing plate.
2. The high power laser module of claim 1, wherein the reflector, the wave plate, the polarizer, and the focusing mirror are coaxially arranged in sequence.
3. The high power laser module of claim 1, wherein the waveplate is a half waveplate.
4. The high power laser module of claim 1, wherein the LD array is two columns and four rows.
5. The high-power laser module according to claim 4, wherein the distance between centers of two columns of the LD array is not more than 15mm, and the overall size is not more than 20 x 30mm.
6. The high power laser module of any one of claims 1 to 5, further comprising a relay lens group disposed between the polarizer and the focusing mirror, the relay lens group comprising a first lens and a second lens; the first lens is arranged on the light path of the coincident light beam emitted from the polaroid and outputs the coincident light beam as a converging light beam; the second lens outputs the converged light beams emitted by the first lens into parallel light beams, and then the parallel light beams are converged and output through the focusing lens.
7. The high power laser module of claim 6, wherein the focusing mirror is a convex lens.
8. The high power laser module of claim 6, wherein the first lens, the second lens, and the focusing lens are all plano-convex lenses.
9. The high power laser module of claim 6, wherein the focal length of the first lens is not less than the focal length of the second lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320945881.9U CN219696910U (en) | 2023-04-24 | 2023-04-24 | High-power laser module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320945881.9U CN219696910U (en) | 2023-04-24 | 2023-04-24 | High-power laser module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219696910U true CN219696910U (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320945881.9U Active CN219696910U (en) | 2023-04-24 | 2023-04-24 | High-power laser module |
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| Country | Link |
|---|---|
| CN (1) | CN219696910U (en) |
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2023
- 2023-04-24 CN CN202320945881.9U patent/CN219696910U/en active Active
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