CN214899325U - Laser beam combining device - Google Patents

Abstract

The utility model discloses a laser beam combining device, laser beam combining device are including closing beam combining module and laser emission module, and laser emission module is two or more than two, and laser emission module includes: the laser device comprises a mounting table and a plurality of light-emitting units, wherein each light-emitting unit comprises a laser emitter and a first reflector, the laser emitter and the first reflector are arranged on the mounting table, and laser emitted by the laser emitter in each light-emitting unit is reflected by the first reflector in the light-emitting unit; the plurality of light emitting units are arranged along a first direction, and emit laser along the first direction, and the height of a first reflector in each light emitting unit is decreased progressively along the first direction; the first reflectors in the light-emitting units are arranged in a reflector row in a first direction, and the laser emitters in two adjacent light-emitting units are respectively positioned on two sides of the reflector row; and the laser emitted by the laser emitting module is synthesized by the beam combining module and then output. The utility model discloses technical scheme makes the power of laser beam combining device high, and small.

Description

Laser beam combining device

Technical Field

The utility model relates to a semiconductor laser technical field, in particular to laser beam combining device.

Background

The laser beam combining device is widely applied to the technical fields of laser cutting, laser welding and the like. With the development of technology, the power and brightness requirements of laser beam combining devices in the market are higher and higher, and more laser emitters need to be coupled in the laser beam combining devices in order to obtain laser beam combining devices with higher power and better brightness, however, as the number of the laser emitters increases, the size of the laser beam combining devices is large, and the use of the laser beam combining devices is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a laser beam combining device aims at making the laser beam combining device power high, and small.

The utility model provides a laser beam combining device, laser beam combining device includes to close beam combining module and laser emission module, laser emission module is two or more, laser emission module includes:

the mounting table is arranged in a step shape; and

the laser light emitting device comprises a plurality of light emitting units, each light emitting unit comprises a laser emitter and a first reflector, the laser emitters and the first reflectors are arranged on the mounting table, and laser light emitted by the laser emitters in each light emitting unit is reflected by the first reflectors in the light emitting unit;

defining a first direction, wherein the light emitting units are arranged along the first direction and emit laser along the first direction, and the heights of the first reflectors in the light emitting units are decreased progressively along the first direction; the first reflectors in the light-emitting units are arranged in a reflector row in the first direction, and the laser emitters in two adjacent light-emitting units are respectively positioned on two sides of the reflector row;

and the lasers emitted by the two or more laser emitting modules are synthesized by the beam combining module and then output.

Optionally, the plurality of laser emitters are arranged in an emitter row along the first direction on two sides of the mirror row respectively.

Optionally, the two emitter columns and the mirror columns are at the same pitch.

Optionally, the heights of the laser emitters in a plurality of the light emitting units decrease along the first direction.

Optionally, the light emitting unit further comprises a first optical element and a second optical element, both the first optical element and the second optical element being located between the laser emitter and the first mirror;

laser emitted by the laser emitter sequentially passes through the first optical element and the second optical element and then is projected on the first reflector; or the laser emitted by the laser emitter passes through the second optical element and the first optical element in sequence and then is projected on the first reflector;

the mounting table is provided with a first step surface and a second step surface, the laser emitter is arranged on the first step surface, and the first optical element is arranged on the second step surface; in the same light emitting unit, the height of the first step surface where the laser emitter is located is higher than the height of the second step surface where the first optical element is located.

Optionally, the first optical element includes a slow-axis collimator, the second optical element includes a fast-axis collimator, the slow-axis collimator is disposed on the second step surface, and the fast-axis collimator is disposed on the first step surface.

Optionally, the mounting table has a plurality of mounting portions arranged along the first direction, the mounting portions having the first step surface and the second step surface;

each mounting part is arranged corresponding to one light-emitting unit, the laser emitter and the second optical element are arranged on the first step surface of the mounting part, and the first reflector and the first optical element are arranged on the second step surface of the mounting part;

in the first direction, the heights of the first step surfaces in the plurality of mounting portions are sequentially decreased progressively; in the first direction, heights of the second step surfaces in the plurality of mounting portions are sequentially decreased progressively.

Optionally, the laser emission module further includes a plurality of heat dissipation fins, each of the heat dissipation fins is correspondingly disposed on the second step surface of the mounting portion, and the first optical element and the first reflector are disposed on the heat dissipation fins.

Optionally, the beam combining module includes a polarization beam combiner, a focusing lens, and an optical fiber, which are sequentially disposed, where the polarization beam combiner has two incident planes;

the laser emitted by the two or more laser emitting modules respectively enters the polarization beam combiner through the two incident surfaces, and the laser output by the polarization beam combiner is output by the optical fiber after passing through the focusing lens.

Optionally, the beam combining module further comprises a second reflector;

and laser emitted by one or more than one laser emitting module enters the polarization beam combiner through the incident plane after being reflected by the second reflecting mirror.

Optionally, the directions of the laser beams emitted by two or more laser emission modules at different heights are the same and parallel to each other, and the laser beams emitted by the two or more laser emission modules directly enter the polarization beam combiner through the same reflection surface;

or the laser emitted by the two or more laser emitting modules is reflected by the second reflecting mirror and then enters the polarization beam combiner through the same reflecting surface.

The utility model discloses technical scheme's laser beam combining device includes two or the laser emission module more than two, and this laser emission module includes a plurality of luminescence unit, and luminescence unit includes laser emitter. The laser emitting module in the laser beam combining device can modularly integrate the laser emitter, so that the laser beam combining device is neat in arrangement and compact in overall structure while having high processing efficiency, and the effects of small structure and wide application range can be achieved.

The first reflectors of the plurality of light emitting units are arranged in a row in a first direction to form a reflector row. After the laser emitted by the laser emitters in the multiple light emitting units is emitted by the corresponding first reflecting mirrors, the laser can be arranged at different heights in the same column, so that the laser range emitted by the multiple light emitting units in the same laser emitting module is concentrated. The laser emitted by the laser emitting module has high energy density under the condition of high energy, so that the energy density and the processing efficiency are high in the processing process of the laser beam combining device.

The laser emitters in two adjacent light-emitting units are respectively located at two sides of the reflector column and emit laser towards the corresponding first reflector, that is, the directions of the laser emitted by the emitters in two adjacent light-emitting units are opposite. Because every laser emitter needs to occupy certain space, set up the laser emitter among a plurality of luminescence units respectively in the both sides of speculum row, installation space on the utilization mount table that can be more reasonable makes the whole length of laser beam combining device shorten for the structure of laser emission module is compacter, and the overall structure of laser beam combining device is smaller and more exquisite, the range of application is wider, can also disperse the heat that luminescence unit produced, improves luminescence unit's radiating efficiency.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a top view of an embodiment of the laser beam combining device of the present invention;

fig. 2 is a top view of an embodiment of the laser beam combining device of the present invention;

FIG. 3 is a schematic structural diagram of the light emitting unit in FIG. 1;

FIG. 4 is a schematic axial view of the laser beam combiner of FIG. 1;

fig. 5 is a schematic structural diagram of an embodiment of the laser beam combining device of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Laser beam combining device	132a	Mirror array
10	Laser emission module	133	First optical element
				11	Mounting table	134	Second optical element
111	Mounting part	14	Heat sink
				111a	First step surface	20	Second reflecting mirror
111b	Second step surface	30	Beam combining module
				13	Light emitting unit	31	Polarization beam combiner
131	Laser transmitter	33	Focusing lens
				131a	Emitter array	35	Optical fiber
132	First reflector

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 and fig. 3, the utility model provides a laser beam combining device 100, this laser beam combining device 100 can synthesize and output the laser of a plurality of laser emitter 131 transmission for laser beam combining device 100 can superpose the power and the luminance of the laser of a plurality of laser emitter 131 transmissions, in order to improve the efficiency and the luminance of the laser of this laser beam combining device 100 transmission.

With reference to fig. 1, in the embodiment of the present invention, the laser beam combining apparatus 100 includes a beam combining module 30 and a laser emitting module 10, the laser emitting module 10 may be two or more, and the laser beam combining apparatus 100 can overlap two or more laser emitting modules 10. Each of the laser emission modules 10 may include a plurality of light emitting units 13, and each of the light emitting units 13 may include an emitter and a first reflecting mirror 132. The laser light emitted by the emitter in each light emitting unit 13 is reflected by the first reflecting mirror 132 in the light emitting unit 13, and the laser light emitted by each light emitting unit 13 is the laser light reflected by the first reflecting mirror 132 in the laser unit. The laser emitted by two or more laser emitting modules 10 is synthesized by the beam combining module 30 and then output, and the laser emitted by each laser emitting module 10 is the laser emitted by the plurality of light emitting units 13 in the laser emitting module 10. In this embodiment, the laser emitting module 10 can modularly integrate the laser emitters 131, so that the laser beam combining device 100 has more laser emitters 131, and is orderly arranged and compact in overall structure, thereby achieving the effects of high processing efficiency, small structure and wide application range.

The laser beam combining device 100 may include a housing (not shown), which may include a housing bottom wall and a housing side wall, the housing side wall being disposed along an edge of the housing bottom wall and enclosing the housing bottom wall to form a receiving cavity. The plurality of laser emitters 131 and the plurality of first reflectors 132 in the laser emitting module 10 may be accommodated in the accommodating cavity. Specifically, the plurality of laser emitters 131 and the plurality of first reflectors 132 may be disposed on the bottom wall of the housing and located in the region surrounded by the side wall of the housing, and the housing may not only physically connect the laser emitters 131 and the first reflectors 132, but also protect the laser emitters 131 and the first reflectors 132. This casing can also include the shell roof, and the shell roof sets up with shell diapire mutually, and the shell lateral wall is from one side of shell diapire back to along circumference connection in shell roof, and a plurality of laser emitter 131 and a plurality of first speculum 132 all are located shell diapire, shell lateral wall and shell roof and enclose regional, and the shell can further protect its inner structure under this structure. The beam combining module 30 may also be disposed in the housing, and the beam combining module 30 may be connected and protected by the housing.

When the laser beam combining device 100 includes a housing, the housing may be two or more, and each housing corresponds to one laser emitting module 10, that is, each laser emitting module 10 is correspondingly installed in one housing, so that the laser beam combining device 100 has a higher modularization degree and is more convenient and faster to assemble.

The laser beam combining device 100 may further include a housing on the basis of the housing, the housing may be the same as the number of the laser emitting modules 10, the components (the laser emitter 131 and the first reflector 132, and other structures) corresponding to each laser emitting module 10 are disposed in a housing, and then the housing and the beam combining module 30 are disposed in the housing. Specifically, a light hole or a light hole may be formed in the housing, so that the laser light emitted from the light emitting units 13 in the laser emitting module 10 can be emitted to the outside through the light hole or the light hole in the housing, and further combined through the beam combining module 30.

With reference to fig. 4, in the embodiment of the present invention, the laser emitting module 10 in the laser beam combining device 100 may include an installation platform 11, when the laser beam combining device 100 includes a housing, the installation platform 11 may be installed on the bottom wall of the housing, and the installation platform 11 may also be integrated with the bottom wall of the housing. The emitters in the light emitting units 13 and the first reflecting mirror 132 are both disposed on the mounting table 11, the mounting table 11 is stepped to enable the plurality of laser emitters 131 disposed thereon to be at different heights, and the first reflecting mirror 132 in each light emitting unit 13 corresponds to the height of the laser emitter 131 in that light emitting unit 13.

A first direction is defined, the plurality of light emitting cells 13 are arranged along the first direction, and the plurality of light emitting cells 13 emit laser light along the first direction. With each light emitting unit 13 as a whole, the heights of the plurality of light emitting units 13 may decrease sequentially along the first direction, so that the laser light emitted by each light emitting unit 13 does not interfere with each other in the propagation direction. The first direction is set corresponding to the laser emitting modules 10, and when the directions of the laser emitted by the light emitting units 13 in the two laser emitting modules 10 are different, the first directions corresponding to the two laser emitting modules 10 are different.

Specifically, the heights of the first reflecting mirrors 132 in the plurality of light emitting units 13 are sequentially decreased in the first direction, so that the laser light emitted by the laser emitter 131 in each light emitting unit 13 can be distributed at different heights after being reflected by the first reflecting mirrors 132 in the light emitting unit 13. In this embodiment, the heights of the laser emitters 131 in the plurality of light emitting units 13 may also be sequentially decreased along the first direction, so that the height of the laser emitter 131 in each light emitting unit 13 corresponds to the height of the first reflector 132. In this embodiment, the laser emitters 131 in the multiple light emitting units 13 may not be arranged in the descending manner, and the laser emitters 131 in the multiple light emitting units 13 may be located at the same height, or may be arranged in any manner, so long as the laser emitted by the laser emitter 131 in each light emitting unit 13 is reflected by the corresponding first reflecting mirror 132 and then distributed at different heights.

Referring to fig. 2, in the embodiment of the present invention, the first reflectors 132 in the plurality of light emitting units 13 may be arranged in a row in the first direction to form a reflector row 132 a. The laser beams emitted from the laser emitters 131 in the plurality of light emitting units 13 can be arranged at different heights in the same column after being emitted by the corresponding first reflecting mirrors 132, so that the laser beams emitted from the plurality of light emitting units 13 in the same laser emitting module 10 are concentrated. The laser emitted by the laser emitting module 10 has high energy density under the condition of high energy, so that the laser beam combining device 100 has high energy density and high processing efficiency in the processing process.

The laser emitters 131 in two adjacent light-emitting units 13 are respectively located at two sides of the mirror column 132a, and emit laser light toward the corresponding first mirror 132, that is, the laser light emitted by the emitters in two adjacent light-emitting units 13 is in opposite directions. Because every laser emitter 131 need occupy certain space, set up the laser emitter 131 in a plurality of luminescence unit 13 respectively in the both sides of speculum rank 132a, can be more reasonable utilize the installation space on the mount table 11, make the whole length of laser beam combining device 100 shorten, make the structure of laser emission module 10 compacter, the overall structure of laser beam combining device 100 is more small and exquisite, the range of application is wider, can also disperse the heat that luminescence unit 13 produced, improve luminescence unit 13's radiating efficiency.

Referring further to fig. 2, in the embodiment of the invention, a plurality of laser emitters 131 may be arranged in an emitter row 131a along a first direction on both sides of a mirror row 132a, respectively. The structure makes the distances between the plurality of laser emitters 131 located on the same side of the mirror row 132a and the corresponding first mirrors 132 substantially the same, and the energies of the laser emitted by the laser emitters 131 on the side, which are reflected by the first mirrors 132, and projected onto the beam combining module 30 are substantially the same, so that the laser energies combined by the beam combining module 30 are uniform, and the laser intensity is easy to control in the processing process by using the laser beam combining device 100.

Further, the distances between the two emitter rows 131a and the reflector rows 132a may be consistent, so that the distances from the laser emitters 131 located at the two sides of the reflector rows 132a to the corresponding first reflectors 132 are substantially equal, and the energies of the laser beams emitted by the laser emitters 131 at the two sides, which are reflected by the first reflectors 132 and then projected onto the beam combining module 30, are substantially equal, so that the laser energy combined by the beam combining module 30 is more uniform, and the laser intensity is more easily controlled during the processing of the workpiece by using the laser beam combining apparatus 100.

With reference to fig. 3 and 4, the light emitting unit 13 in the embodiment of the present invention may further include a first optical element 133 and a second optical element 134, and the first optical element 133 and the second optical element 134 are both located between the laser emitter 131 and the first reflector 132. Laser emitted by the laser emitter 131 passes through the first optical element 133 and the second optical element 134 in sequence and then is projected on the first reflector 132; alternatively, the laser emitted from the laser emitter 131 passes through the second optical element 134 and the first optical element 133 in sequence and then is projected onto the first reflector 132. The first optical element 133 and the second optical element 134 can perform corresponding optical processing on the laser emitted by the laser emitter 131, so that the laser processed by the first optical element 133 and the second optical element 134 meets corresponding use requirements.

The first optical element 133 and the second optical element 134 may respectively include a slow axis collimator and a block axis collimator, and the slow axis collimator can collimate the laser light on a slow axis so that the laser light can be concentrated in a slow axis direction; the fast axis collimator can collimate laser on the fast axis, so that the laser can be concentrated in the fast axis direction. The laser processed by the slow axis collimator and the block axis collimator can be distributed with tight energy in the fast axis direction and the slow axis direction, the light spots projected by the laser emitting module 10 to the laser beam combining device 100 are arranged tightly, and the energy density of the light spots combined by the beam combining module 30 is high. When the first and second optical elements 133 and 134 include a slow-axis collimator and a fast-axis collimator, respectively, the positions of the first and second optical elements 133 and 134 may also be interchanged.

Referring to fig. 4, since the mounting stage 11 is provided in a stepped shape, the mounting stage 11 may have a first stepped surface 111a and a second stepped surface 111b, the laser emitter 131 may be provided on the first stepped surface 111a, and the first optical element 133 may be provided on the second stepped surface 111 b; in the same light emitting unit 13, the height of the first step surface 111a on which the laser emitter 131 is located may be higher than the height of the second step surface 111b on which the first optical element 133 is located. When the size of the first optical element 133 is larger than the volume of the laser emitter 131, the height of the corresponding second step surface 111b is set to be lower than the height of the first step surface 111a, so that the bottom height of the first optical element 133 in the same light emitting unit 13 is lower than the bottom height of the laser emitter 131, and the laser emitted by the laser emitter 131 can be projected to the middle of the first optical element 133, thereby ensuring that the first optical element 133 has a good processing effect on the laser. For example, when the first optical element 133 includes a slow axis collimator, since the distance from the optical center of the slow axis collimator to the bottom of the slow axis collimator is generally greater than the distance from the laser emission point of the laser emitter 131 to the bottom of the laser emitter 131, the bottom of the slow axis collimator may be mounted on the lower second step surface 111b, the laser emitter 131 may be mounted on the upper first step surface 111a, and the distance between the first step surface 111a and the second step surface 111b in the height direction is set to be appropriate so that the optical center of the slow axis collimator and the height of the laser emission point of the laser emitter 131 coincide. The optical center is defined herein as the location where the optical element has the best effect on the laser light.

It can be understood that, in the embodiment of the present invention, when the distance from the optical center of the first optical element 133 to the bottom of the first optical element 133 is smaller than the distance from the laser emitting point of the laser emitter 131 to the bottom of the laser emitter 131, in order to ensure that the laser emitted from the laser emitter 131 can be projected onto the optical center of the first optical element 133, the height of the first step surface on which the laser emitter 131 is located may be lower than the height of the second step surface on which the first optical element is located in the same light emitting unit 13.

When the distance from the optical center of the first optical element 133 to the bottom of the first optical element 133 is consistent with the distance from the laser emitting point of the laser emitter 131 to the bottom of the laser emitter 131, in order to ensure that the laser emitted by the laser emitter 131 can be projected on the optical center of the first optical element 133, the height of the first step surface on which the laser emitter 131 is located may be equal to the height of the second step surface on which the first optical element 133 is located in the same light emitting unit 13.

In the above embodiment, the first optical element 133 is specifically configured according to the type of the first optical element 133, the size of the first optical element 133, and the usage requirement of the first optical element 133.

In the above embodiment, the second optical element 134 may also be arranged in a manner similar to the first optical element, specifically, according to the type of the second optical element 134, the size of the second optical element 134, and the usage requirement of the second optical element 134.

In the embodiment of the present invention, when the first optical element 133 includes the slow axis collimator and the second optical element 134 includes the fast axis collimator, the second step surface 111b can be located with the slow axis collimator, and the first step surface 111a can be located with the fast axis collimator. In this embodiment, since the distance from the optical center of the fast axis collimator to the bottom of the fast axis collimator is substantially the same as the distance from the laser emitting point of the laser emitter 131 to the bottom of the laser emitter 131, in the same light emitting unit 13, the laser emitter 131 and the fast axis collimator may both be located on the first step surface 111a, so that the light emitting unit 13 has a more compact structure, the laser emitting module 10 has a more compact structure, and the overall volume of the laser beam combining device 100 is smaller.

With reference to fig. 1, in the embodiment of the present invention, the mounting platform 11 may have a plurality of mounting portions 111 arranged along the first direction, each mounting portion 111 is disposed corresponding to one light emitting unit 13, that is, each light emitting unit 13 is disposed on one mounting portion 111, and the overall height of the mounting portion 111 may decrease progressively along the first direction, so that the overall height of each light emitting unit 13 decreases progressively along the first direction. The laser light emitted from the laser emitter 131 in each light emitting unit 13 is processed by the corresponding first optical element 133, second optical element 134 and first reflector 132 to be at different heights, and the heights of the laser light emitted from each light emitting unit 13 decrease along the first direction.

Referring to fig. 4, the mounting portion 111 may have a first step surface 111a and a second step surface 111b, and the first step surface 111a may have a height higher than that of the second step surface 111b on the same mounting portion 111, the laser emitter 131 of the light emitting unit 13 may be disposed on the first step surface 111a, and the first optical element 133 of the light emitting unit 13 may be disposed on the second step surface 111 b. When the distance from the optical center of the first optical element 133 to the bottom of the first optical element 133 is greater than the distance from the laser emitting point of the laser emitter 131 to the bottom of the laser emitter 131, it is ensured that the laser emitted by the laser emitter 131 is projected onto the optical center of the first optical element 133. In this embodiment, the first optical element 133 may comprise a slow-axis collimator.

Further, the laser emitter 131 and the second optical element 134 in the light emitting unit 13 are commonly provided on the first step surface 111a of the mounting portion 111, and the first mirror 132 and the first optical element 133 in the light emitting unit 13 are commonly provided on the second step surface 111b of the mounting portion 111. The laser emitted by the laser emitter 131 in the light emitting unit 13 passes through the second optical element 134 and the first optical element 133 in sequence, and then is projected onto the first reflector 132. In this embodiment, when the distance from the optical center of the second optical element 134 to the bottom of the second optical element 134 is substantially the same as the distance from the laser emitting point of the laser emitter 131 to the bottom of the laser emitter 131, it is ensured that the laser emitted by the laser emitter 131 can be projected on the optical center of the second optical element 134. In this embodiment, the second optical element 134 may comprise a fast axis collimator.

Specifically, in the first direction, the heights of the first step surfaces 111a in the plurality of mounting portions 111 decrease sequentially, so that the heights at which the laser emitters 131 in the plurality of light emitting units 13 are located decrease sequentially in the first direction; in the first direction, the heights of the second step surfaces 111b in the plurality of mounting parts 111 are sequentially decreased such that the first optical elements 133 and the first reflecting mirrors 132 provided on the second step surfaces 111b match the heights of the corresponding laser emitters 131.

In the embodiment of the present invention, the laser emitting module 10 may further include a plurality of heat dissipation fins 14, each heat dissipation fin 14 corresponds to the second step surface 111b of the mounting portion 111, and the first optical element 133 may be disposed on the heat dissipation fin 14 to dissipate heat of the first optical element 133, and the heat dissipation fins 14 may be disposed on the first optical element 133 and the first reflecting mirror 132 to dissipate heat of the first optical element 133 and the first reflecting mirror 132. The heat sink 14 can dissipate heat of components arranged thereon, so that heat on the first optical element 133 and the first reflector 132 can be dissipated in time, the service life of the first optical element 133 and the first reflector 132 is ensured, and the service life and the use safety of the whole laser beam combining device 100 are improved. It is understood that the heat sink 14 may be disposed on the first step surface 111a, and the laser emitter 131 and/or the second optical element 134 may be disposed on the heat sink 14 to dissipate heat of the laser emitter 131 and the second optical element 134. The heat sink 14 may be a ceramic sheet.

In the embodiment shown in fig. 2 and fig. 4, the laser emitters 131 in two adjacent light emitting units 13 are respectively located at two sides of the mirror column 132a, that is, the laser emitters 131 in the plurality of light emitting units 13 are respectively arranged at two sides of the mirror column 132a to form the emitter column 131 a. This configuration not only can dissipate heat generated by the light emitting unit 13, but also can shorten the overall length of the laser beam combining device 100. The heights of the first step surfaces 111a on which the plurality of laser emitters 131 in the same emitter column 131a are located decrease sequentially in the first direction. The laser emitters 131 in the same emitter column 131a emit laser beams in the same direction and parallel to each other, and the heights of the laser emitters decrease in sequence along the first direction; the first reflective mirrors 132 corresponding to the plurality of laser emitters 131 in the same emitter column 131a are parallel to each other, so that the laser light emitted by the laser emitters 131 in the same emitter column 131a is reflected by the corresponding first reflective mirrors 132 to be in a parallel state. The laser emitted by the laser emitter 131 is disposed at an angle with respect to the first direction, and the laser emitted by the laser emitter 131 is reflected by the first reflecting mirror 132 and then propagates along the first direction, and specifically, the laser emitted by the laser emitter 131 may be perpendicular to the first direction.

The laser beams emitted by the laser emitters 131 in two adjacent light emitting units 13 are parallel to each other and have opposite directions, after the laser beams are processed by the second optical element 134 and the first optical element 133, the laser beams are projected onto the first reflecting mirror 132, and the first reflecting mirror 132 deflects the angle of the laser beams, so that the laser beams emitted by the light emitting units 13 are transmitted along the first direction, the laser beams emitted by the light emitting units 13 in the laser emitting module 10 are all parallel to each other, and the light spots projected onto the beam combining module 30 can be uniformly distributed on the same straight line at intervals.

Referring to fig. 4 and 5, in the embodiment of the present invention, the beam combining module 30 may include a polarization beam combiner 31, a focusing lens 33 and an optical fiber 35, which are sequentially disposed, the polarization beam combiner 31 has two incident surfaces, the two incident surfaces may respectively receive the laser beams in the two orthogonal directions, and the laser beams in the two orthogonal directions can be combined.

When the laser beam combining apparatus 100 includes two or more laser emitting modules 10, the laser beams emitted by the two or more laser emitting modules 10 enter the polarization beam combiner 31 through two incident planes, respectively, and the laser beams emitted by the polarization beam combiner 31 pass through the focusing lens 33 and are then output by the optical fiber 35. The beam combining module 30 can combine and output the laser light incident through the incident surface, the laser light output through the beam combining module 30 enters the focusing lens 33, the focusing lens 33 focuses the laser light, and the laser light enters the optical fiber 35 after being focused by the focusing lens 33.

The focusing lens 33 may comprise an aspherical mirror or a cylindrical lens. When the focusing lens 33 is an aspherical mirror, the aspherical mirror can couple the laser output by the beam combining module 30, and then input the laser into the optical fiber 35; when the focusing lens 33 is a cylindrical lens, two cylindrical lenses can be used, which can be a slow-axis coupling lens and a fast-axis coupling lens, respectively, and the two cylindrical lenses can perform slow-axis coupling and fast-axis coupling on the laser output by the beam combining module 30, so that the energy of the laser focused by the focusing lens 33 is more concentrated. The focusing lens 33 is located in the direction of the laser output by the polarization beam combiner 31, so that the distance between the laser beam combiner and the focusing lens 33 can be small enough, the light spot of the laser output by the laser beam combiner and projected on the focusing lens 33 is small, the numerical aperture of the focusing lens 33 can be reduced, and the laser quality and the laser power of the laser beam combining device 100 can be improved.

The laser beam combining device 100 according to the embodiment of the present invention may further include a second reflecting mirror 20; the laser emitted by one or more laser emitting modules 10 enters the polarization beam combiner 31 through the incident surface after being reflected by the second reflecting mirror 20. Under the condition that the second reflector 20 is arranged, the direction of the laser emitted by the laser emitting module 10 and the direction of the second reflector are correspondingly adjusted, so that the position of the laser emitting module 10 relative to the beam combining module 30 can be selected more, and the laser beam combining device 100 is more reasonable in structural arrangement and more compact in structure.

When there are two laser emitting modules 10, the two laser emitting modules 10 may be respectively located at two sides of the polarization beam combiner 31, the lasers emitted by the light emitting units 13 in the two laser emitting modules 10 may respectively vertically enter two incident surfaces of the polarization beam combiner 30, the polarization beam combiner 31 further has an exit surface, and the polarization beam combiner 31 combines the lasers received by the two incident surfaces, outputs the combined laser from the exit surface, and enters the optical fiber 35 through the focusing lens 33 for propagation.

Because the two incident surfaces of the polarization beam combiner 31 are disposed adjacent to each other, in order to make the overall structure of the laser beam combining device 100 more regular, the two laser emitting modules 10 may be disposed at two opposite sides of the beam combining device, the laser emitted by one laser emitting module 10 is projected onto the incident surface along a direction perpendicular to the one incident surface, and the laser emitted by the other laser emitting module 10 is reflected by the second reflecting mirror 20 and then is projected onto the incident surface along a direction perpendicular to the other incident surface. Because the lasers emitted by the two laser emitting modules 10 are not affected by each other, the two laser emitting modules 10 can be located at the same height, that is, the mounting table 11 in one laser emitting module 10 can be consistent with the mounting table 11 in the other laser emitting module 10 in structure, so as to improve the production and processing efficiency of the laser beam combining device 100.

When the laser beam combining apparatus 100 includes a plurality of laser emitting modules 10, two or more of the laser emitting modules 10 may emit laser beams at different heights in the same direction and be parallel to each other;

the laser beams emitted by the two or more laser emitting modules 10 enter the polarization beam combiner 31 through the same reflection surface, that is, the same reflection surface of the polarization beam combiner 31 can simultaneously receive the laser beams emitted by the multiple laser emitters 131, so that the polarization beam combiner 31 can combine the laser beams emitted by the multiple laser emitters 131, in this embodiment, one or more laser mirrors emitted by the laser beam combining module 30 may also enter the polarization beam combiner 31 through another reflection surface after being reflected by the second reflecting mirror 20;

or, when the laser directions emitted by the two or more laser emission modules 10 at different heights are the same and are parallel to each other, the laser emitted by the two or more laser emission modules 10 enters the polarization beam combiner 31 through the same reflection surface after being reflected by the second reflecting mirror 20, in this embodiment, one or more laser mirrors emitted by the laser beam combining module 30 directly enter the polarization beam combiner 31 through another reflection surface.

The above embodiment can further integrate a plurality of laser emitting modules 10 into a laser beam combining device 100, so that the laser beam combining device 100 has more laser emitters 131, and the laser beam combining device 100 has good laser energy, high brightness and high processing efficiency in the processing process.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (10)

1. The laser beam combining device is characterized by comprising a beam combining module and two or more laser emitting modules, wherein the laser emitting modules comprise:

the mounting table is arranged in a step shape; and

the laser light emitting device comprises a plurality of light emitting units, each light emitting unit comprises a laser emitter and a first reflector, the laser emitters and the first reflectors are arranged on the mounting table, and laser light emitted by the laser emitters in each light emitting unit is reflected by the first reflectors in the light emitting unit;

defining a first direction, wherein the light emitting units are arranged along the first direction and emit laser along the first direction, and the heights of the first reflectors in the light emitting units are decreased progressively along the first direction; the first reflectors in the light-emitting units are arranged in a reflector row in the first direction, and the laser emitters in two adjacent light-emitting units are respectively positioned on two sides of the reflector row;

and the lasers emitted by the two or more laser emitting modules are synthesized by the beam combining module and then output.

2. The laser beam combining apparatus according to claim 1, wherein a plurality of the laser emitters are arranged in an emitter row along the first direction on both sides of the mirror row, respectively.

3. The laser beam combining apparatus of claim 2 wherein the two emitter columns are spaced from the mirror columns by a uniform distance.

4. The laser beam combining apparatus of claim 1, wherein the heights of the laser emitters in a plurality of the light emitting units decrease along the first direction.

5. The laser beam combining device according to any one of claims 1 to 4, wherein the light emitting unit further comprises a first optical element and a second optical element, both of which are located between the laser emitter and the first mirror;

laser emitted by the laser emitter sequentially passes through the first optical element and the second optical element and then is projected on the first reflector; or the laser emitted by the laser emitter passes through the second optical element and the first optical element in sequence and then is projected on the first reflector;

the mounting table is provided with a first step surface and a second step surface, the laser emitter is arranged on the first step surface, and the first optical element is arranged on the second step surface; in the same light emitting unit, the height of the first step surface where the laser emitter is located is higher than the height of the second step surface where the first optical element is located.

6. The laser beam combining apparatus of claim 5 wherein the first optical element comprises a slow axis collimator and the second optical element comprises a fast axis collimator, the slow axis collimator disposed on the second step surface and the fast axis collimator disposed on the first step surface.

7. The laser beam combining device according to claim 5, wherein the mount table has a plurality of mount portions arranged in the first direction, the mount portions having the first step surface and the second step surface;

each mounting part is arranged corresponding to one light-emitting unit, the laser emitter and the second optical element are arranged on the first step surface of the mounting part, and the first reflector and the first optical element are arranged on the second step surface of the mounting part;

in the first direction, the heights of the first step surfaces in the plurality of mounting portions are sequentially decreased progressively; in the first direction, heights of the second step surfaces in the plurality of mounting portions are sequentially decreased progressively.

8. The laser beam combining device according to claim 7, wherein the laser emitting module further includes a plurality of heat sinks, each of the heat sinks is disposed on the second step surface of the mounting portion, and the first optical element and the first reflector are disposed on the heat sinks.

9. The laser beam combining device according to any one of claims 1 to 4, wherein the beam combining module comprises a polarization beam combiner, a focusing lens and an optical fiber, which are arranged in sequence, and the polarization beam combiner has two incident planes;

the laser emitted by the two or more laser emitting modules respectively enters the polarization beam combiner through the two incident surfaces, and the laser output by the polarization beam combiner is output by the optical fiber after passing through the focusing lens.

10. The laser beam combining apparatus of claim 9, further comprising a second mirror;

and laser emitted by one or more than one laser emitting module enters the polarization beam combiner through the incident plane after being reflected by the second reflecting mirror.

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