CN221159035U - Laser beam combining optical path structure based on double lasers - Google Patents

Abstract

The utility model discloses a laser beam combining optical path structure based on a double laser, which comprises a first laser, a second laser and an optical module; the optical module comprises a laser beam combining unit, a first reflecting unit, a second reflecting unit and a third reflecting unit; the laser beam combining unit comprises a beam combining lens and a lens seat, and the first laser beam and the second laser beam are respectively incident from different mirror surfaces of the beam combining lens; the beam combining lens transmits the first laser beam and reflects the second laser beam so that the emergent light of the first laser beam passing through the beam combining lens and the emergent light of the second laser beam passing through the beam combining lens are output in the same beam; the beam combining lens comprises a Brewster sheet and a diamond layer, light energy lost by the first laser beam and the second laser beam on the beam combining lens is converted into heat energy, and the heat energy is uniformly transmitted to the lens base through the diamond layer; the lens base is also provided with a water cooling structure for absorbing heat energy so as to further realize heat dissipation of the beam combining lens and prolong the service life of the beam combining lens; the utility model has stronger practicability.

Description

Laser beam combining optical path structure based on double lasers

Technical Field

The utility model belongs to the technical field of laser processing, and particularly relates to a laser beam combining optical path structure based on a double laser.

Background

The most commonly used lasers in the technical fields of laser processing such as laser welding, laser cutting and laser marking are fiber lasers and CO2 (carbon dioxide) lasers, wherein the fiber lasers have higher beam quality, and the CO2 lasers have higher laser output power. With the continuous development of laser processing technology, the laser output power of the traditional CO2 laser cannot meet the high-power processing requirement of the market, and in order to accelerate the processing speed, widen the application range and improve the processing quality, people are all dedicated to developing a higher-power CO2 laser.

In the prior art, the discharge plate in the laser is enlarged to increase the laser output power, and although the method can effectively improve the laser output power, the method can lead to the laser to become larger in size, and meanwhile, the overall cost of the laser can become higher, and the problems of unstable laser output, low photoelectric conversion efficiency, complex structure and the like are also caused; in addition, the photoelectric conversion efficiency of the CO2 laser is low, and the internal heat dissipation problem is caused, so that the laser output power is affected, as in the prior art, the Chinese patent with the publication number of CN207217985U discloses a radio-frequency excited carbon dioxide laser electrode structure, and the technology mainly solves the heat dissipation problem of the electrode of a single CO2 laser.

In addition, there is also a prior art that proposes laser coupling a first and a second laser beams emitted by two CO2 lasers through a Brewster lens (Brewster plate), taking the first laser beam as an example, the first laser beam passing through the Brewster lens to generate reflected light and transmitted light, when the incident angle of the first laser beam passing through the Brewster lens is the Brewster angle, the reflected light forms an angle of 90 ° with the transmitted light, at this time, the first laser beam is decomposed into P polarized light polarized parallel to the incident plane and S polarized light polarized perpendicular to the incident plane, the reflected light is polarized light (only S polarized light and no P polarized light), and the transmitted light is still partially polarized light (P polarized light and partially S polarized light); because the light loss difference between the P polarized light and the S polarized light is very large, the polarization state of the laser radiation is usually P polarized light, the light energy of the reflection loss can be converted into heat energy, the heat energy can be directly transmitted to the brewster lens, the heat energy can cause the instantaneous temperature of the lens to be too high, thereby influencing the service performance and service life of the lens, and simultaneously, the laser is low in final output laser power and poor in beam quality, and the process of acquiring high-quality and high-power laser by the CO2 laser can be blocked.

Therefore, a laser beam combining optical path structure based on a dual laser is needed, so that the CO2 laser can output high-power laser and can solve the problems of high cost, unstable laser output, excessively high instantaneous lens temperature and the like.

Disclosure of Invention

Aiming at the problems in the related art, the utility model provides a laser beam combining optical path structure based on a double laser to overcome the technical problems existing in the prior related art, and the utility model enables a CO2 laser to output high-power laser by combining a first laser, a second laser and an optical module; meanwhile, the beam combining lens combining the Brewster plate and the diamond layer is also utilized, and the water cooling structure and other designs are adopted to solve the problems of high cost, unstable laser output, excessively high instantaneous lens temperature and the like.

The technical scheme of the utility model is realized as follows: the laser beam combining optical path structure based on the double lasers comprises a first laser, a second laser, an optical module and a laser beam combining unit, wherein the optical module comprises a laser beam combining unit;

The laser beam combining unit comprises a beam combining lens and a lens seat for fixing the beam combining lens; the beam combining lens comprises a Brewster sheet and a diamond layer which are sequentially arranged, and the diamond layer covers one side surface of the Brewster sheet; the lens seat is made of aluminum or aluminum alloy; the lens seat is machined by one-time clamping and positioning, is formed by drilling, milling and cutting, and has less cutting quantity and high process precision;

The first laser emits a first laser beam, and the second laser emits a second laser beam; the first laser beam and the second laser beam are respectively incident from different mirror surfaces of the beam combining mirror, and the emergent light of the first laser beam after passing through the beam combining mirror and the emergent light of the second laser beam after passing through the beam combining mirror are output in the same beam;

An optical cavity for incidence of the laser beam is formed in the lens base; the beam combining lens is arranged on one side of the lens seat through a pressing sheet, and is formed into the side wall of the optical cavity, and the diamond layer is in fit connection with the lens seat; the light energy of the first laser beam and the second laser beam, which are lost on the beam combining lens, is converted into heat energy, and the heat energy is uniformly transmitted to the lens base through the diamond layer;

preferably, the thickness of the diamond layer is 0.05-1mm;

In the utility model, the optical cavity can provide a certain heat dissipation space for the heat dissipation of the beam combining lens besides the incidence of the laser beam; in the prior art, the whole lens is directly made of diamond, but the thickness of the diamond lens is mostly more than 7mm, and the cost of the diamond is extremely high, so that the diamond lens is unfavorable for industrial production, and the beam combining lens combines a Brewster sheet and a diamond layer, so that the thickness of the diamond layer is controlled to be 0.05-1mm, and the production cost is reduced. And moreover, the diamond layer is in fit connection with the mirror seat, so that the heat transfer area is enlarged, and the rapid transfer of heat energy is realized.

In addition, the lenses in the prior art are generally made of zinc selenide or other traditional manufacturing materials, but because the heat conduction performance of diamond is better than that of zinc selenide, the optical transmittance of the diamond sheet is high, the brewster angle of the diamond sheet is close to that of the zinc selenide sheet, the brewster angle of the diamond sheet is 67.2 degrees, and the brewster angle of the zinc selenide sheet is 67.4 degrees, the diamond layer is preferably bonded with the brewster sheet in the utility model.

Further, a water cooling structure is arranged in the lens seat, and comprises a water cooling channel, and a water inlet hole and a water outlet hole which are communicated with the water cooling channel; the water cooling structure can further absorb heat energy on the lens base so as to achieve the effects of cooling and heat dissipation.

Preferably, a window frame for placing the beam combining lens is arranged on the lens seat; the window frame is of a hollow structure, and a window communicated with the optical cavity is formed in the middle of the window frame; the middle part of the pressing sheet is provided with a light-passing opening, the edge of the pressing sheet is also provided with a plurality of mounting hole sites, and the beam combining mirror can be mounted in the window frame through the mounting hole sites, screws and other fasteners;

Preferably, the window is circular, elliptical or polygonal in shape;

The corners of the window frame are provided with round notches, and the round notches are beneficial to preventing the beam combining lens from being damaged due to too tight; the frame edge of the window frame is provided with an inclined angle facing inwards, and the inclined angle is favorable for filling heat conduction silicone grease around the high-power laser lens so that the lens can bring heat to the lens seat more quickly; the area of the light through opening is smaller than the mirror surface area of the beam combining lens so as to prevent the beam combining lens from loosening and falling.

The optical module further comprises a first reflecting unit, a second reflecting unit and a third reflecting unit; the first laser beam is reflected to the optical cavity through the first reflecting unit and the second reflecting unit in sequence, and the second laser beam is reflected to the beam combining mirror through the third reflecting unit; the beam combining mirror transmits the first laser beam and reflects the second laser beam so that the first laser beam passes through the beam combining mirror and is output with the reflected light of the second laser beam in the same beam;

The bottom of the lens seat is connected with an adjusting component, the adjusting component is arranged on the bottom plate and comprises a first adjuster and an adjusting platform, and the first adjuster is connected with the adjusting platform to control the adjusting platform to horizontally move; the lens seat is arranged on the adjusting platform;

Preferably, the third reflecting unit comprises a third diaphragm, a third reflecting mirror, a third adjusting plate and a third adjusting seat, wherein the third reflecting mirror is arranged on the third adjusting plate, and the third adjusting plate is connected with the third adjusting seat; a fifth adjusting piece and a sixth adjusting piece are arranged on the third adjusting seat, and the fifth adjusting piece and the sixth adjusting piece are respectively connected with a third adjusting plate to adjust the angle between the surface of the third reflecting mirror and the output light path of the second laser beam;

a light modulator is arranged between the third reflecting unit and the laser beam combining unit, and one end of the light modulator is connected with the lens base; the dimmer comprises a fourth diaphragm and a fifth diaphragm which are sequentially arranged along the propagation direction of the second laser beam, and the fourth diaphragm and the fifth diaphragm are concentrically arranged;

Preferably, the first reflecting unit comprises a first diaphragm, a first reflecting mirror, a first adjusting plate and a first adjusting seat, wherein the first reflecting mirror is arranged on the first adjusting plate, and the first adjusting plate is connected with the first adjusting seat; the first adjusting seat is provided with a first adjusting piece and a second adjusting piece, and the first adjusting piece and the second adjusting piece are respectively connected with the first adjusting plate to adjust the angle between the surface of the first reflecting mirror and the first laser beam output light path;

The second reflecting unit comprises a second diaphragm, a second reflecting mirror, a second adjusting plate and a second adjusting seat, wherein the second reflecting mirror is arranged on the second adjusting plate, and the second adjusting plate is connected with the second adjusting seat; the second adjusting seat is provided with a third adjusting piece and a fourth adjusting piece, and the third adjusting piece and the fourth adjusting piece are respectively connected with the second adjusting plate to adjust the angle between the surface of the second reflecting mirror and the output light path of the first laser beam;

Further, the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm, the fifth diaphragm, the first reflecting mirror, the second reflecting mirror and the beam combining mirror are positioned at the same height, and the beam combining light paths of the first laser beam and the second laser beam can be subjected to light path adjustment through devices such as a dimmer, a diaphragm, an adjusting component, an adjusting plate, an adjusting seat and an adjusting piece;

In the utility model, the dimmer and the plurality of diaphragm are used for controlling the propagation direction of light rays and limiting the width of the laser beam; the setting of adjusting component and a plurality of regulating plates, regulating seat, regulating part for the regulation of light path becomes simpler convenient.

Preferably, in the inside of the lens base, the water cooling channel is of a semi-surrounding structure; the water cooling channel comprises a first flow channel, a second flow channel and a third flow channel which are sequentially connected, and the second flow channel extends downwards from the top of the optical cavity to the bottom of the optical cavity along the height of the lens seat;

Preferably, the first flow passage extends from the water inlet hole to one end of the second flow passage, and the third flow passage extends from the other end of the second flow passage to the water outlet hole;

preferably, the water cooling channel is C-shaped or 匚 -shaped;

Waterway adapters are arranged on the water inlet holes and the water outlet holes; on the lens base, the water inlet and the water outlet are arranged on opposite sides of the beam combining lens, and the water inlet and the water outlet are arranged symmetrically up and down;

The water cooling structure, the waterway adapter and the water cooling channel are arranged in a semi-surrounding structure, so that the water cooling structure can further perform uninterrupted cooling heat exchange on the lens base in a cold water circulating flow mode, and heat dissipation of the beam combining lens is achieved.

Preferably, the lens base is also provided with a temperature detector lens which is arranged on the same side as the water inlet, and the temperature detector lens comprises an infrared temperature probe which faces the beam combining lens; the lens of the temperature detector is fixed on the lens seat through a mounting plate and a fastening piece;

The lens of the temperature detector and the infrared temperature probe are arranged to better monitor the temperature change on the beam combining lens so as to better protect the beam combining lens, thereby ensuring the stability of laser transmission; when the temperature of the beam combining lens is higher, the radiation energy is stronger, the more infrared rays are radiated, and the higher the temperature detected by the infrared temperature probe is; when the heat energy on the beam combining lens is uniformly transmitted to the lens seat through the diamond layer, the temperature detected by the infrared temperature probe is reduced.

Preferably, the lens base is further provided with a temperature sensor located above the beam combining lens, the temperature sensor is used for detecting temperature change of the lens base, and the temperature sensor is fixed through a mounting plate.

Preferably, a hole is also arranged on the lens seat; an opening at one end of the pore canal is positioned between the Brewster piece and the diamond layer, and a suction pipe joint is arranged at the opening at the other end of the pore canal; the suction pipe joint is connected with the micro vacuum pump through a vacuum suction pipe.

The utility model has the beneficial effects that:

(1) The utility model provides a laser beam combining optical path structure based on a double laser, wherein the beam combining lens comprises a Brewster plate and a diamond layer, the diamond layer has good heat conductivity and high laser transmissivity, and the Brewster angle of the diamond layer is very close to the Brewster angle of a zinc selenide plate, so when the instantaneous temperature on the beam combining lens is too high, the diamond layer can transmit high-power laser, and can also quickly transmit heat energy to a lens seat to reduce the influence of a high Wen Duige beam lens, thereby enabling a first laser beam and a second laser beam to finish beam combining and outputting stable high-power laser;

(2) And moreover, the inside of the lens seat is provided with a water cooling structure, and the water cooling structure further carries out uninterrupted cooling heat exchange on the lens seat in a cold water circulation flow mode, so that the heat dissipation of the beam combining lens is realized, and the service life of the beam combining lens is prolonged.

Drawings

FIG. 1 is a schematic diagram of a laser beam combining optical path structure based on a dual laser of the present utility model;

FIG. 2 is a schematic diagram of a laser beam combining unit according to the present utility model;

FIG. 3 is a schematic exploded view of the laser beam combining unit of FIG. 2;

FIG. 4 is a cross-sectional view of the combination of the beam combiner and the lens holder of the present utility model;

FIG. 5 is a schematic view of a lens base according to the present utility model;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a cross-sectional view taken along A-A of FIG. 6;

FIG. 8 is a schematic view showing the structure of the suction attachment and the duct of the present utility model exploded;

FIG. 9 is a schematic diagram of an optical module according to the present utility model;

FIG. 10 is a top view of the optical module of FIG. 9;

fig. 11 is a schematic structural view of a third reflection unit of the present utility model.

Marking:

10. A first laser; 11. a first laser beam; 12. a second laser; 13. a second laser beam;

20. a bottom plate; 21. A regulator; 22. Adjusting a platform;

30. a beam combining lens; 31. Brewster's sheet; 32. A diamond layer;

40. A lens base; 41. an optical cavity; 42. a window frame; 421. a window; 43. a water cooling channel; 431. a first flow passage; 432. a second flow passage; 433. a third flow passage; 434. a water inlet hole; 435. a water outlet hole; 436. a waterway adapter; 44. a seal; 45. tabletting; 46. an infrared temperature probe; 47. a mounting plate; 48. a temperature sensor; 49. a mounting piece;

50. A first reflection unit; 60. a second reflection unit; 70. a third reflection unit; 71. a third diaphragm; 72. a third mirror; 73. a third adjusting plate; 74. a third adjusting seat; 75. a fifth adjusting member; 76. a sixth adjustment member;

80. A dimmer; 90. a duct; 91. and a suction pipe joint.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 1-11, the present embodiment provides a laser beam combining optical path structure based on dual lasers, including a first laser 10 and a second laser 12, and an optical module, where the optical module includes a laser beam combining unit;

As shown in fig. 2-5, the laser beam combining unit includes a beam combining lens 30, and a lens holder 40 for fixing the beam combining lens 30; the beam combiner 30 includes a brewster plate 31 and a diamond layer 32 arranged in sequence, wherein the diamond layer 32 covers one side surface of the brewster plate 31; the lens holder 40 is made of aluminum or aluminum alloy; the lens seat 40 is machined by one-time clamping and positioning, and is formed by drilling, milling and cutting, so that the cutting quantity is small and the process precision is high;

The first laser 10 emits a first laser beam 11 and the second laser 12 emits a second laser beam 13; the first laser beam 11 and the second laser beam 13 respectively enter from different mirror surfaces of the beam combining lens 30, and the outgoing light of the first laser beam 11 after passing through the beam combining lens 30 and the outgoing light of the second laser beam 13 after passing through the beam combining lens 30 are output in the same beam;

The lens base 40 is provided with an optical cavity 41 for incidence of the laser beam; the beam combining lens 30 is mounted on one side of the lens base 40 through a pressing sheet 45 and is formed into a side wall of the optical cavity 41, and the diamond layer 32 is attached to the lens base 40; the light energy of the first and second laser beams lost on the beam combining lens 30 is converted into heat energy, and the heat energy is uniformly transmitted to the lens base 40 through the diamond layer 32;

Specifically, the thickness of the diamond layer 32 is 0.05 to 1mm;

In this embodiment, the optical cavity 41 may provide a certain heat dissipation space for the heat dissipation of the beam combiner 30, besides the laser beam being incident; in the prior art, the whole lens is directly made of diamond, but the thickness of the diamond lens is mostly more than 7mm, and the cost of the diamond is extremely high, so that the diamond lens is unfavorable for industrial production, while the beam combining lens 30 in the embodiment combines the Brewster plate 31 and the diamond layer 32, so that the thickness of the diamond layer 32 is controlled to be 0.05-1mm, and the production cost is reduced. Moreover, the contact connection of the diamond layer 32 and the lens holder 40 is beneficial to enlarging the heat transfer area, thereby realizing rapid heat energy transfer.

In addition, the lens in the prior art is generally made of zinc selenide or other traditional manufacturing materials, but because the heat conduction performance of diamond is better than that of zinc selenide, the optical transmittance of the diamond sheet is high, the brewster angle of the diamond sheet is close to that of the zinc selenide sheet, the brewster angle of the diamond sheet is 67.2 degrees, and the brewster angle of the zinc selenide sheet is 67.4 degrees, the diamond layer 32 is preferably bonded with the brewster sheet 31 in the utility model.

Specifically, as shown in fig. 7, the inside of the lens holder 40 is provided with a water cooling structure, and the water cooling structure includes a water cooling channel 43, and a water inlet 434 and a water outlet 435 that are communicated with the water cooling channel 43;

The water cooling structure can further absorb the heat energy on the lens base 40 to achieve the effects of cooling and heat dissipation.

Specifically, as shown in fig. 3, a window frame 42 for placing the beam combiner 30 is disposed on the lens base 40; the window frame 42 has a hollow structure, and a window 421 communicating with the optical cavity 41 is provided in the middle portion thereof; the middle part of the pressing sheet 45 is provided with a light-transmitting port, the edge of the pressing sheet 45 is also provided with a plurality of mounting hole sites, and the beam combining mirror 30 can be mounted in the window frame 42 through the fasteners such as the mounting hole sites, screws and the like;

specifically, the window 421 has a circular, oval or polygonal shape;

the corners of the window frame 42 are provided with circular notches which are beneficial to preventing damage to the beam combining mirror 30 due to excessive tightening; the frame edge of the window frame 42 is provided with an inclined angle facing inwards, and the inclined angle is favorable for filling heat conduction silicone grease around the high-power laser lens so that the lens can bring heat to the lens seat 40 more quickly; the area of the light-transmitting opening is smaller than the mirror surface area of the beam combining lens 30, so as to prevent the beam combining lens 30 from loosening and falling.

As shown in fig. 9 to 10, the optical module further includes a first reflection unit 50, a second reflection unit 60, and a third reflection unit 70; the first laser beam 11 is reflected to the optical cavity 41 through the first reflecting unit 50 and the second reflecting unit 60 in sequence, and the second laser beam 13 is reflected to the beam combining mirror 30 through the third reflecting unit 70; the beam combining mirror 30 transmits the first laser beam 11 and reflects the second laser beam 13, so that the first laser beam 11 passes through the beam combining mirror 30 and outputs the same beam as the reflected light of the second laser beam 13;

The bottom of the lens seat 40 is connected with an adjusting component, the adjusting component is mounted on the bottom plate 20 and comprises a first adjuster 21 and an adjusting platform 22, and the first adjuster 21 is connected with the adjusting platform 22 to control the adjusting platform 22 to move horizontally; the lens seat 40 is mounted on the adjusting platform 22;

Specifically, as shown in fig. 11, the third reflecting unit 70 includes a third diaphragm 71, a third reflecting mirror 72, a third adjusting plate 73, and a third adjusting seat 74, the third reflecting mirror 72 is mounted on the third adjusting plate 73, and the third adjusting plate 73 is connected to the third adjusting seat 74; a fifth adjusting piece 75 and a sixth adjusting piece 76 are arranged on the third adjusting seat 74, and the fifth adjusting piece 75 and the sixth adjusting piece 76 are respectively connected with the third adjusting plate 73 to adjust the angle between the surface of the third reflector 72 and the output light path of the second laser beam 13;

As shown in fig. 9-10, a light modulator 80 is further disposed between the third reflecting unit 70 and the laser beam combining unit, and one end of the light modulator 80 is connected with the lens base 40; the dimmer 80 comprises a fourth diaphragm and a fifth diaphragm which are sequentially arranged along the propagation direction of the second laser beam 13, and the fourth diaphragm and the fifth diaphragm are concentrically arranged;

Specifically, the first reflecting unit 50 includes a first diaphragm, a first reflecting mirror, a first adjusting plate, and a first adjusting seat, where the first reflecting mirror is mounted on the first adjusting plate, and the first adjusting plate is connected to the first adjusting seat; the first adjusting seat is provided with a first adjusting piece and a second adjusting piece, and the first adjusting piece and the second adjusting piece are respectively connected with the first adjusting plate to adjust the angle between the surface of the first reflecting mirror and the output light path of the first laser beam 11;

The second reflecting unit 60 includes a second diaphragm, a second reflecting mirror, a second adjusting plate, and a second adjusting seat, where the second reflecting mirror is mounted on the second adjusting plate, and the second adjusting plate is connected with the second adjusting seat; the second adjusting seat is provided with a third adjusting piece and a fourth adjusting piece, and the third adjusting piece and the fourth adjusting piece are respectively connected with the second adjusting plate to adjust the angle between the surface of the second reflecting mirror and the output light path of the first laser beam 11;

Specifically, the first diaphragm, the second diaphragm, the third diaphragm 71, the fourth diaphragm, the fifth diaphragm, the first mirror, the second mirror and the beam combining mirror 30 are located at the same height, and the beam combining paths of the first and second laser beams can be adjusted by devices such as a dimmer 80, a diaphragm, an adjusting component, an adjusting plate, an adjusting seat, an adjusting piece and the like;

In this embodiment, the dimmer 80 and the plurality of diaphragms are used for controlling the propagation direction of the light and limiting the width of the laser beam; the setting of adjusting component and a plurality of regulating plates, regulating seat, regulating part for the regulation of light path becomes simpler convenient.

Specifically, as shown in fig. 7, in the inside of the lens holder 40, the water cooling channel 43 has a semi-surrounding structure; the water cooling channel 43 includes a first flow channel 431, a second flow channel 432 and a third flow channel 433 connected in sequence, where the second flow channel 432 extends downward from the top of the optical cavity 41 to the bottom of the optical cavity 41 along the height of the lens seat 40;

Specifically, the first flow channel 431 extends from the water inlet 434 to one end of the second flow channel 432, and the third flow channel 433 extends from the other end of the second flow channel 432 to the water outlet 435; as shown in fig. 5, in the actual machining process, a process hole is preset on the surface of the lens holder 40, then a drilling tool is used to drill directly from the process hole to form a water cooling channel 43, and finally the process hole is blocked by a sealing element 44 to prevent cold water leakage;

specifically, the water cooling channel 43 is C-shaped or 匚 -shaped;

As shown in fig. 5-6, the water inlet 434 and the water outlet 435 are provided with a waterway adapter 436; on the lens base 40, the water inlet 434 and the water outlet 435 are disposed on opposite sides of the beam combining lens 30, and the water inlet 434 and the water outlet 435 are disposed symmetrically up and down;

The water cooling structure, the waterway adapter 436 and the water cooling channel 43 are arranged in a semi-surrounding structure, so that the water cooling structure can further perform uninterrupted cooling heat exchange on the lens base 40 in a cold water circulating flow mode, thereby realizing heat dissipation of the beam combining lens 30.

As shown in fig. 2-3, the lens base 40 is further provided with a thermo-detector lens disposed at the same side as the water inlet 434, and the thermo-detector lens includes an infrared temperature probe 46 facing the beam combiner 30; the lens of the temperature detector is fixed on the lens base 40 through a mounting plate 47 and a fastener;

The lens of the temperature detector and the infrared temperature probe 46 are arranged to better monitor the temperature variation on the beam combining lens 30, so as to better protect the beam combining lens 30, thereby ensuring the stability of laser transmission; when the temperature of the beam combining lens 30 is higher, the radiation energy is stronger, the more infrared rays are radiated, and the higher the temperature detected by the infrared temperature probe 46 is; when the heat energy on the beam combining lens 30 is uniformly transferred to the lens holder 40 through the diamond layer 32, the temperature detected by the infrared temperature probe 46 is reduced.

Specifically, the lens base 40 is further provided with a temperature sensor 48 located above the beam combiner 30, the temperature sensor 48 is used for detecting the temperature change of the lens base 40, and the temperature sensor 48 is fixed by a mounting plate 49.

As shown in fig. 8, a hole 90 is further formed in the lens base 40; an opening at one end of the pore canal 90 is positioned between the brewster plate 31 and the diamond layer 32, and a suction pipe joint 91 is arranged at the opening at the other end of the pore canal 90; the suction pipe joint 91 is connected with a micro vacuum pump through a vacuum suction pipe;

In this embodiment, a vacuum sucking hole 90 is provided between the brewster plate 31 and the diamond layer 32, and a micro vacuum pump can continuously provide negative pressure for the diamond layer 32 and the brewster plate 31, so that the two layers can be tightly bonded together under the action of atmospheric pressure, and the bonding position of the diamond layer 32 and the brewster plate 31 is prevented from generating bubbles to influence the transmittance of the laser beam.

As shown in fig. 10, by the above technical solution, in a specific application: the first laser 10 emits a first laser beam 11 and the second laser 12 emits a second laser beam 13; the first laser beam 11 is reflected to the optical cavity 41 through the first reflecting unit 50 and the second reflecting unit 60 in sequence, and the second laser beam 13 is reflected to the beam combining mirror 30 through the third reflecting unit 70; the beam combining mirror 30 transmits the first laser beam 11 and reflects the second laser beam 13; the transmitted light of the first laser beam 11 passing through the beam combining lens 30 and the reflected light of the second laser beam 13 passing through the beam combining lens 30 are combined on the surface of the beam combining lens 30 and output; meanwhile, the light energy lost by the first and second laser beams after passing through the beam combining lens 30 is converted into heat energy, the heat energy is uniformly transmitted to the lens base 40 through the diamond layer 32 for heat dissipation, and the water cooling structure can further absorb the heat energy on the lens base 40, so that the effect of further cooling and heat dissipation is achieved; in the process of adjusting the first and second laser beam paths, the adjustment assembly, the plurality of adjustment plates, the adjustment seat, the adjustment piece and the like can be adjusted.

Variations and modifications to the above would be obvious to persons skilled in the art to which the utility model pertains from the foregoing description and teachings. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the utility model should be also included in the scope of the claims of the utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims (10)

1. The laser beam combining optical path structure based on the double lasers comprises a first laser and a second laser, and is characterized by further comprising an optical module, wherein the optical module comprises a laser beam combining unit;

The laser beam combining unit comprises a beam combining lens and a lens seat for fixing the beam combining lens; the beam combining lens comprises a Brewster sheet and a diamond layer which are sequentially arranged, and the diamond layer covers one side surface of the Brewster sheet;

The first laser emits a first laser beam, and the second laser emits a second laser beam; the first laser beam and the second laser beam are respectively incident from different mirror surfaces of the beam combining mirror, and the emergent light of the first laser beam after passing through the beam combining mirror and the emergent light of the second laser beam after passing through the beam combining mirror are output in the same beam;

An optical cavity for incidence of the laser beam is formed in the lens base; the beam combining lens is arranged on one side of the lens seat through a pressing sheet, and is formed into the side wall of the optical cavity, and the diamond layer is in fit connection with the lens seat;

The inside of mirror seat is equipped with water-cooling structure, water-cooling structure includes the water-cooling passageway to and inlet port, the apopore of water-cooling passageway intercommunication.

2. The laser beam combining optical path structure based on the dual lasers as claimed in claim 1, wherein the thickness of the diamond layer is 0.05-1mm.

3. The laser beam combining optical path structure based on the double lasers as claimed in claim 1, wherein a window frame for placing the beam combining lens is arranged on the lens base; the window frame is of a hollow structure, and a window communicated with the optical cavity is formed in the middle of the window frame; the middle part of the pressing sheet is provided with a light-passing port, and the edge of the pressing sheet is also provided with a plurality of mounting hole sites;

The optical module further comprises a first reflecting unit, a second reflecting unit and a third reflecting unit; the first laser beam is reflected to the optical cavity through the first reflecting unit and the second reflecting unit in sequence, and the second laser beam is reflected to the beam combining mirror through the third reflecting unit; the beam combining mirror transmits the first laser beam and reflects the second laser beam, so that the first laser beam passes through the beam combining mirror and is output with the reflected light of the second laser beam in the same beam.

4. A dual laser based laser beam combining optical path structure as claimed in claim 3, wherein the window is circular, elliptical or polygonal in shape;

The bottom of the lens seat is connected with an adjusting component, the adjusting component is arranged on the bottom plate and comprises a first adjuster and an adjusting platform, and the first adjuster is connected with the adjusting platform to control the adjusting platform to horizontally move; the lens seat is arranged on the adjusting platform.

5. The laser beam combining optical path structure based on the dual laser as claimed in claim 3, wherein the third reflecting unit comprises a third diaphragm, a third reflecting mirror, a third adjusting plate and a third adjusting seat, the third reflecting mirror is mounted on the third adjusting plate, and the third adjusting plate is connected with the third adjusting seat; a fifth adjusting piece and a sixth adjusting piece are arranged on the third adjusting seat, and the fifth adjusting piece and the sixth adjusting piece are respectively connected with a third adjusting plate to adjust the angle between the surface of the third reflecting mirror and the output light path of the second laser beam;

A light modulator is arranged between the third reflecting unit and the laser beam combining unit, and one end of the light modulator is connected with the lens base; the dimmer comprises a fourth diaphragm and a fifth diaphragm which are sequentially arranged along the propagation direction of the second laser beam, and the fourth diaphragm and the fifth diaphragm are concentrically arranged.

6. The laser beam combining optical path structure based on the dual laser as claimed in claim 3, wherein the first reflecting unit comprises a first diaphragm, a first reflecting mirror, a first adjusting plate and a first adjusting seat, the first reflecting mirror is mounted on the first adjusting plate, and the first adjusting plate is connected with the first adjusting seat; the first adjusting seat is provided with a first adjusting piece and a second adjusting piece, and the first adjusting piece and the second adjusting piece are respectively connected with the first adjusting plate to adjust the angle between the surface of the first reflecting mirror and the first laser beam output light path;

The second reflecting unit comprises a second diaphragm, a second reflecting mirror, a second adjusting plate and a second adjusting seat, wherein the second reflecting mirror is arranged on the second adjusting plate, and the second adjusting plate is connected with the second adjusting seat; the second adjusting seat is provided with a third adjusting piece and a fourth adjusting piece, and the third adjusting piece and the fourth adjusting piece are respectively connected with the second adjusting plate to adjust the angle between the surface of the second reflecting mirror and the output light path of the first laser beam.

7. The laser beam combining optical path structure based on the double lasers as claimed in claim 1, wherein, inside the lens base, the water cooling channel is a semi-surrounding structure; the water cooling channel comprises a first flow channel, a second flow channel and a third flow channel which are sequentially connected, and the second flow channel extends downwards from the top of the optical cavity to the bottom of the optical cavity along the height of the lens seat;

Waterway adapters are arranged on the water inlet holes and the water outlet holes; on the lens base, the water inlet and the water outlet are arranged on opposite sides of the beam combining lens, and the water inlet and the water outlet are arranged symmetrically up and down.

8. The dual laser based laser beam combining optical path structure as defined in claim 7, wherein the first flow channel extends from the water inlet to one end of the second flow channel, and the third flow channel extends from the other end of the second flow channel to the water outlet.

9. The dual laser based laser beam combining optical path structure as defined in claim 8, wherein the water cooling channel is C-shaped or 匚 -shaped.

10. The laser beam combining optical path structure based on the dual lasers as claimed in claim 1, wherein a hole is further formed on the lens base; an opening at one end of the pore canal is positioned between the Brewster piece and the diamond layer, and a suction pipe joint is arranged at the opening at the other end of the pore canal; the suction pipe joint is connected with the micro vacuum pump through a vacuum suction pipe.