CN117353138A - Heat radiation structure of high-power laser lens - Google Patents
Heat radiation structure of high-power laser lens Download PDFInfo
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- CN117353138A CN117353138A CN202311346580.5A CN202311346580A CN117353138A CN 117353138 A CN117353138 A CN 117353138A CN 202311346580 A CN202311346580 A CN 202311346580A CN 117353138 A CN117353138 A CN 117353138A
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- 230000005855 radiation Effects 0.000 title claims abstract description 12
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 83
- 239000010432 diamond Substances 0.000 claims abstract description 83
- 230000017525 heat dissipation Effects 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000007493 shaping process Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 abstract description 8
- 230000008878 coupling Effects 0.000 abstract description 8
- 238000010168 coupling process Methods 0.000 abstract description 8
- 238000005859 coupling reaction Methods 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 12
- PFNQVRZLDWYSCW-UHFFFAOYSA-N (fluoren-9-ylideneamino) n-naphthalen-1-ylcarbamate Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1=NOC(=O)NC1=CC=CC2=CC=CC=C12 PFNQVRZLDWYSCW-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000002834 transmittance Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005224 laser annealing Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/034—Optical devices within, or forming part of, the tube, e.g. windows, mirrors
- H01S3/0346—Protection of windows or mirrors against deleterious effects
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0401—Arrangements for thermal management of optical elements being part of laser resonator, e.g. windows, mirrors, lenses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a heat radiation structure of a high-power laser lens, and belongs to the technical field of laser processing. The high-power laser lens comprises a lens layer and a diamond sheet layer, and when the instantaneous temperature on the high-power laser lens is too high, the diamond sheet layer can rapidly conduct heat energy to the lens seat main body; in addition, a circulating heat exchange structure is further arranged in the lens seat main body, and the circulating heat exchange structure further performs uninterrupted cooling heat exchange on the lens seat main body in a cold water circulating flow mode, so that the influence of high temperature on the lens is reduced; in addition, the invention utilizes the mode of bonding the lens layer and the diamond sheet layer, so that the high-power laser lens not only can be a lens bonded with the diamond sheet layer by the Brewster lens, but also can be a lens bonded with the diamond sheet layer by the beam expanding lens, the shaping lens and the like; therefore, the invention not only can solve the heat dissipation problem when the high-power laser lens is used for double-laser beam coupling, but also can solve the heat dissipation problem when the lens is used for single-beam high-power laser.
Description
Technical Field
The invention belongs to the technical field of laser processing, and particularly relates to a heat dissipation structure of a high-power laser lens.
Background
With the continuous development of high and new technologies, CO is currently available 2 (carbon dioxide) lasers have been widely used for laser welding, laser cutting, laser annealing and at laser surfacesLaser processing technology field such as theory, but the prior CO 2 It is a great technical difficulty and defect in the art that it is difficult to continue to increase the laser output power upwards after the laser output power of the laser reaches 300W.
In the field of laser processing technology, the prior art generally increases laser output power by two methods: the first method is to increase the laser output power by making the discharge plate of the laser large, and the second method is to obtain high-power laser by laser coupling of two lasers. Although these two methods can effectively increase the laser output power, they have some drawbacks at the same time:
(1) The method has the problems that the volume of the laser is larger, the overall cost is higher, the laser output is unstable, the photoelectric conversion efficiency is low, the structure is complex and the like after a while; and, CO 2 The photoelectric conversion efficiency of the laser is low, and the internal heat dissipation problem is caused, so that the output power of the laser is affected, as in the prior art, chinese patent publication No. CN207217985U discloses a radio frequency excited carbon dioxide laser electrode structure, wherein CO is also mentioned 2 The problem of heat dissipation of the electrodes of the laser also affects the laser output power;
(2) In the prior art, the second method is mostly applied to a semiconductor laser, such as a laser device for realizing semiconductor laser beam coupling by a parallel flat prism group disclosed in Chinese patent with publication number of CN 101854031A; there are also prior art proposals to combine two CO 2 The first laser beam and the second laser beam emitted by the laser are coupled through a Brewster lens (Brewster plate), the first laser beam is taken as an example, the first laser beam passes 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 included angle between the reflected light and the transmitted light is 90 degrees, at the moment, the first laser beam can be decomposed into P polarized light polarized parallel to an incident plane and S polarized light polarized perpendicular to the incident plane, the reflected light is polarized light (only S polarized light but not P polarized light), and the transmitted light is still partially polarized light (P polarized light and partial S polarized light); due to the difference in optical loss between P-polarized light and S-polarized lightThe polarization state of the laser radiation is usually P polarized light, the light energy of reflection loss is converted into heat energy, the heat energy is 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 can also cause low laser power and poor beam quality which are finally output by the laser, thereby further obstructing CO 2 The laser acquires the progress of high-quality and high-power laser.
In addition, the brewster lens has a problem of excessively high instantaneous lens temperature, except when coupling the dual laser beams, and this problem also occurs when a single high power laser beam is applied to the brewster lens. In addition, in the field of single-beam high-power laser, there are many different lenses in different optical path systems, such as beam expanding lenses, shaping lenses, window lenses, etc., and these lenses cannot be suitable for high-power laser beams due to the presence of zinc selenide and other conventional manufacturing materials. If the laser output power needs to be improved, the prior art directly adopts diamond as the material of the lens, but the cost of the diamond is extremely expensive, and meanwhile, the market application of high-power laser beams is greatly limited due to the variety and the number of lenses of the optical path system.
Therefore, a heat dissipation structure of a high-power laser lens is needed, so that the existing laser lens can not only transmit high-power laser, but also solve the problem of excessively high instantaneous temperature of the lens.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a heat dissipation structure of a high-power laser lens, so as to overcome the technical problems in the prior art, and the high-power laser lens comprises a lens layer and a diamond sheet layer, wherein the diamond sheet layer has good heat conductivity and high laser transmittance, and when the instantaneous temperature on the high-power laser lens is too high, the diamond sheet layer can rapidly conduct heat energy to a lens holder main body, so that the influence of high temperature on the high-power laser lens is reduced; meanwhile, the inside of the lens holder main body is provided with a circulating heat exchange structure, and the circulating heat exchange structure further carries out uninterrupted cooling heat exchange on the lens holder main body in a cold water circulating flow mode, so that further heat dissipation of the high-power laser lens is realized, and the service life of the high-power laser lens is prolonged.
The technical scheme of the invention is realized as follows: the heat dissipation structure of the high-power laser lens comprises a lens seat main body, wherein the lens seat main body is made of a high-heat-conductivity material;
the high thermal conductivity material includes but is not limited to aluminum or aluminum alloy;
the mirror seat main body is made of aluminum alloy, so that compared with the existing mirror seat main body, the mirror seat main body has the advantages of low manufacturing cost, drop resistance, integrated forming and the like, can be produced in a flow line, and improves production efficiency; solves the problems of expensive cost, low production efficiency, incapability of producing and the like of the existing lens seat main body.
The high-power laser lens comprises a lens layer and a diamond sheet layer which are sequentially arranged, and the diamond sheet layer covers one side surface of the lens layer; the lens layer and the diamond sheet layer are bonded to form an integrated structure;
the lens seat main body is provided with a cavity for incidence of a laser beam; the high-power laser lens is arranged on one side of the lens seat main body through a pressing sheet and is formed into the side wall of the cavity, and at the moment, the diamond sheet layer is in fit connection with the lens seat main body; the light energy of the laser beam lost on the high-power laser lens is converted into heat energy, and the heat energy is uniformly transmitted to the lens seat main body through the diamond sheet layer;
in the invention, the cavity can provide a certain heat dissipation space for the heat dissipation of the high-power laser lens besides the incidence of the laser beam. And secondly, the lamination and connection of the diamond sheet layer and the mirror seat main body are beneficial to enlarging the heat transfer area, so that the rapid transfer of heat energy is realized. In addition, in the prior art, the lens is 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 diamond is high, the brewster angle of a 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 sheet is preferably bonded with a lens layer in the invention.
Further, the thickness of the diamond sheet is 0.05-1mm;
in the prior art, the whole lens can be directly made of diamond, but the thickness of the diamond lens is mostly more than 7mm, and the cost of the diamond is high, so that the diamond lens is not beneficial to industrial production; the high-power laser lens can control the thickness of the diamond sheet layer to be 0.05-1mm by the way of attaching the lens layer and the diamond sheet layer, and is beneficial to reducing the production cost.
In the invention, a circulating heat exchange structure is arranged in the mirror base main body; the circulating heat exchange structure comprises a heat dissipation channel, a water inlet and a water outlet which are communicated with the heat dissipation channel;
the circulating heat exchange structure can further absorb heat energy on the mirror base main body so as to achieve the effects of cooling and heat dissipation.
A suction hole is also arranged on the lens seat main body; one end opening of the suction hole is positioned between the lens layer and the diamond sheet layer, and the other end opening of the suction hole is connected with a micro vacuum pump through a vacuum suction pipe; the suction hole is connected with a vacuum suction pipe through a suction pipe connector;
according to the invention, the suction hole for sucking vacuum is arranged between the diamond sheet layer and the lens layer, negative pressure can be continuously provided for the diamond sheet layer and the lens layer through the miniature vacuum pump, and the two sheet layers can be tightly attached together under the action of atmospheric pressure, so that bubbles generated at the attachment position of the diamond sheet layer and the lens layer can be prevented from affecting the transmittance of laser beams.
Further, the lens layer is a brewster lens; the first laser beam and the second laser beam are respectively incident from different mirror surfaces of the high-power laser lens, and emergent light of the first laser beam after passing through the high-power laser lens and emergent light of the second laser beam after passing through the high-power laser lens are combined and output;
further, the lens layer is a beam expanding lens, a shaping lens or a window lens;
the invention uses the mode of jointing the lens layer and the diamond layer, so that the high-power laser lens can be not only a lens jointed with the Brewster lens and the diamond layer, but also a lens jointed with the diamond layer such as a beam expanding lens, a shaping lens, a window lens and the like; therefore, the invention not only can solve the heat dissipation problem when the high-power laser lens is used for double-laser beam coupling, but also can solve the heat dissipation problem when the high-power laser lens is used for single-beam high-power laser.
Preferably, a window frame for placing the high-power laser lens is arranged on the lens seat main body; the window frame is of a hollow structure, and a window communicated with the cavity is formed in the middle of the window frame; a hole is formed in the middle of the pressing sheet; the edge of the pressing sheet is also provided with a plurality of mounting hole sites, and the high-power laser lens 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 which are beneficial to preventing the high-power laser 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 main body more quickly; the area of the hole is smaller than the mirror surface area of the high-power laser lens so as to prevent the high-power laser lens from loosening and falling.
Preferably, in the lens base main body, the heat dissipation channel is of a semi-surrounding structure; the heat dissipation 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 cavity to the bottom of the cavity along the height of the lens seat main body;
the first flow passage extends from the water inlet 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;
preferably, the heat dissipation channel is C-shaped or -shaped;
preferably, waterway adapters are arranged on the water inlet and the water outlet;
the water inlet and the water outlet are arranged on opposite sides of the high-power laser lens on the lens seat main body, and are symmetrically arranged up and down;
the circulating heat exchange structure, the waterway adapter and the radiating channel are of a semi-surrounding structure, so that the circulating heat exchange structure can further perform uninterrupted cooling heat exchange on the lens holder main body in a cold water circulating flow mode, and radiating of the high-power laser lens is achieved.
Preferably, the lens seat main body is also provided with a temperature detector lens arranged on the same side as the water inlet, and the temperature detector lens comprises an infrared temperature probe facing the high-power laser lens; the lens of the temperature detector is fixed on the lens seat main body 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 high-power laser lens so as to better protect the high-power laser lens and ensure the stability of laser transmission; when the temperature of the high-power laser lens is higher, the radiation energy is stronger, the radiation of infrared rays is more, and the temperature detected by the infrared temperature probe is higher; when the heat energy on the high-power laser lens is uniformly conducted to the lens seat main body through the diamond sheet, the temperature detected by the infrared temperature probe is reduced.
Preferably, the lens base main body is also provided with a temperature sensor positioned above the high-power laser lens, the temperature sensor is used for detecting the temperature change of the lens base main body, and the temperature sensor is fixed through a mounting plate;
the bottom of the lens seat main body is connected with a fixed base which is used for fixing the lens seat main body in the laser; the fixed base and the lens base main body can be connected into a whole through welding and fastening connection, or are directly formed into a whole through a casting process.
The invention has the beneficial effects that:
(1) The invention provides a heat radiation structure of a high-power laser lens, wherein the high-power laser lens comprises a lens layer and a diamond sheet layer; the diamond sheet layer is in fit connection with the mirror base main body, so that the heat transfer area is enlarged, and the rapid transfer of heat energy is realized; in the prior art, the lens is made of zinc selenide or other traditional manufacturing materials, but the Brewster angle of the diamond sheet is very close to that of the zinc selenide sheet, and the diamond sheet layer has good heat conductivity and high laser transmittance, so that when the instantaneous temperature on the high-power laser lens is too high, the diamond sheet layer can quickly conduct heat energy to the lens seat main body, and the influence of high temperature on the high-power laser lens is reduced;
(2) Secondly, the heat radiation structure comprises a lens seat main body, a circulating heat exchange structure is arranged in the lens seat main body, and the circulating heat exchange structure further carries out uninterrupted cooling heat exchange on the lens seat main body in a cold water circulating flow mode, so that the heat radiation of the high-power laser lens is realized, and the service life of the high-power laser lens is prolonged; the heat dissipation structure is novel in design, simple in structure and convenient to produce and industrialize;
(3) The lens layer is Brewster lens, or beam expanding lens, or shaping lens, or window lens; the invention uses the mode of jointing the lens layer and the diamond layer, so that the high-power laser lens can be not only a lens jointed with the Brewster lens and the diamond layer, but also a lens jointed with the diamond layer such as a beam expanding lens, a shaping lens, a window lens and the like; therefore, the invention not only can solve the heat dissipation problem when the high-power laser lens is used for double-laser beam coupling, but also can solve the heat dissipation problem when the high-power laser lens is used for single-beam high-power laser;
(4) In addition, a suction hole for sucking vacuum is arranged between the diamond sheet layer and the lens layer, negative pressure can be continuously provided for the diamond sheet layer and the lens layer through the miniature vacuum pump, and the two sheet layers can be tightly attached together under the action of atmospheric pressure, so that bubbles generated at the attachment position of the diamond sheet layer and the lens layer can be prevented from affecting the transmittance of laser beams.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a heat dissipation structure of a high-power laser lens according to the present invention;
FIG. 2 is a partially exploded view of a heat dissipating structure of a high power laser lens according to the present invention;
FIG. 3 is a schematic diagram of a high power laser lens according to the present invention;
FIG. 4 is a schematic diagram illustrating the disassembled structure of the waterway adapter and the lens base body of the present invention;
FIG. 5 is a top view of the lens holder body of FIG. 4;
FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;
FIG. 7 is a schematic diagram of a heat dissipation structure of a high power laser lens according to the present invention;
FIG. 8 is a cross-sectional view of the combination of the high power laser lens and the lens mount body of the present invention;
fig. 9 is a schematic exploded view of the interface and connector of the present invention.
Reference numerals:
1. a high power laser lens; 11. a lens layer; 12. a diamond sheet; 2. a lens holder main body; 21. a cavity; 22. a window frame; 221. a window; 23. a heat dissipation channel; 231. a first flow passage; 232. a second flow passage; 233. a third flow passage; 234. a seal; 24. a water inlet; 25. a water outlet; 26. a waterway adapter; 27. a fixed base; 28. a suction hole; 29. a joint; 3. tabletting; 4. a first laser beam; 5. a second laser beam; 6. an infrared temperature probe; 7. a mounting plate; 8. a temperature sensor; 9. and (5) mounting the sheet.
Detailed Description
The following description of the embodiments of the present invention 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 invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, 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 invention 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 invention.
Example 1
As shown in fig. 1, in this embodiment, a heat dissipation structure of a high-power laser lens is provided, where the heat dissipation structure includes a lens holder body 2, and the lens holder body 2 is made of a high-thermal-conductivity material;
the lens seat main body 2 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 high thermal conductivity material includes but is not limited to aluminum or aluminum alloy;
the mirror seat main body 2 is made of aluminum alloy, so that compared with the existing mirror seat main body 2, the mirror seat main body 2 has the advantages of low manufacturing cost, drop resistance, integrated molding and the like, and can be produced in a flow line, and the production efficiency is improved; solves the problems of high cost, low production efficiency, incapacity of producing and the like of the prior lens seat main body 2.
As shown in fig. 3 and 8, the high-power laser lens 1 includes a lens layer 11 and a diamond sheet layer 12 arranged in sequence, wherein the diamond sheet layer 12 covers one side surface of the lens layer 11; the lens layer 11 and the diamond sheet layer 12 are bonded to form an integrated structure;
as shown in fig. 1, 2 and 4, the lens base main body 2 is provided with a cavity 21 for incidence of the laser beam; the high-power laser lens 1 is mounted on one side of the lens holder main body 2 through a pressing sheet 3 and is formed into a side wall of the cavity 21, and at this time, the diamond sheet 12 is attached to the lens holder main body 2; the light energy of the laser beam lost on the high-power laser lens 1 is converted into heat energy, and the heat energy is uniformly conducted to the lens base main body 2 through the diamond sheet 12;
in this embodiment, the cavity 21 may provide a certain heat dissipation space for the heat dissipation of the high-power laser lens 1, besides the laser beam. Secondly, the lamination and connection of the diamond sheet 12 and the lens holder main body 2 in the embodiment are beneficial to enlarging the heat transfer area, thereby realizing the rapid transfer of heat energy. In addition, in the prior art, the lens is 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 diamond 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, so in the embodiment, the diamond sheet is preferably bonded with the lens layer 11.
Specifically, the thickness of the diamond sheet 12 is 0.05 to 1mm;
in the prior art, the whole lens can be directly made of diamond, but the thickness of the diamond lens is mostly more than 7mm, and the cost of the diamond is high, so that the diamond lens is not beneficial to industrial production; in the high-power laser lens 1 in this embodiment, the thickness of the diamond sheet 12 can be controlled to be 0.05-1mm by attaching the lens layer 11 and the diamond sheet 12, which is beneficial to reducing the production cost.
As shown in fig. 6, a circulating heat exchange structure is arranged in the lens base main body 2; the circulating heat exchange structure comprises a heat dissipation channel 23, a water inlet 24 and a water outlet 25 which are communicated with the heat dissipation channel 23;
the circulating heat exchange structure can further absorb heat energy on the lens base main body 2 so as to achieve the effects of cooling and heat dissipation.
As shown in fig. 1 and 9, a suction hole 28 is further provided on the lens base main body 2; one end opening of the suction hole 28 is positioned between the lens layer 11 and the diamond sheet layer 12, and the other end opening of the suction hole 28 is connected with a micro vacuum pump through a vacuum suction pipe; the suction hole 28 is connected with a vacuum suction pipe through a suction pipe joint 29;
in this embodiment, a suction hole 28 for sucking vacuum is provided between the diamond sheet 12 and the lens 11, and a micro vacuum pump can continuously provide negative pressure for the diamond sheet 12 and the lens 11, so that the two sheets can be tightly bonded together under the action of atmospheric pressure, thereby preventing bubbles generated at the bonding position of the diamond sheet 12 and the lens 11 from affecting the transmittance of the laser beam.
Further, the lens layer 11 is a brewster lens; the first laser beam 4 and the second laser beam 5 respectively enter from different mirror surfaces of the high-power laser lens 1, and outgoing light of the first laser beam 4 after passing through the high-power laser lens 1 and outgoing light of the second laser beam 5 after passing through the high-power laser lens 1 are combined and output;
in this embodiment, both side mirror surfaces of the high-power laser lens 1 may be reflective surfaces or transmissive surfaces; as shown in fig. 7, when the surface of the lens layer 11 on the side not covered by the diamond sheet layer 12 is a reflective surface, the surface of the diamond sheet layer 12 on the side away from the lens layer 11 is a transmissive surface; the first laser beam 4 is transmitted from the cavity 21 through the transmission surface, meanwhile, the second laser beam 5 is reflected by the reflection surface, and finally, the transmitted light of the first laser beam 4 and the reflected light of the second laser beam 5 are subjected to laser coupling to obtain a high-power laser beam; the light energy of the first and second laser beams lost on the high-power laser lens 1 is converted into heat energy, and the heat energy is uniformly conducted to the lens base main body 2 through the diamond sheet 12, so that the heat dissipation problem of the high-power laser lens 1 during double-laser beam coupling can be solved.
Specifically, as shown in fig. 2 and 9, a window frame 22 for placing the high-power laser lens 1 is provided on the lens holder main body 2; the window frame 22 is of a hollow structure, and a window 221 communicated with the cavity 21 is formed in the middle of the window frame; a hole is formed in the middle of the pressing sheet 3; the edge of the pressing sheet 3 is also provided with a plurality of mounting hole sites, and the high-power laser lens 1 can be mounted in the window frame 22 through the mounting hole sites, screws and other fasteners;
specifically, the window 221 has a circular, oval or polygonal shape;
the corners of the window frame 22 are provided with circular notches which are beneficial to prevent damage to the high power laser lens 1 due to excessive tightening; the frame edge of the window frame 22 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 1 so that the lens can bring heat to the lens seat main body 2 more quickly; the area of the hole is smaller than the mirror surface area of the high-power laser lens 1, so that the high-power laser lens 1 is prevented from loosening and falling.
As shown in fig. 6, in the lens holder main body 2, the heat dissipation channel 23 has a semi-surrounding structure, the heat dissipation channel 23 includes a first flow channel 231, a second flow channel 232, and a third flow channel 233 that are sequentially connected, and the second flow channel 232 extends downward from the top of the cavity 21 to the bottom of the cavity 21 along the height of the lens holder main body 2;
the first flow channel 231 extends from the water inlet 24 to one end of the second flow channel 232, and the third flow channel 233 extends from the other end of the second flow channel 232 to the water outlet 25; as shown in fig. 4 and 6, in the actual machining process, a process hole is preset on the surface of the lens holder main body 2, then a drilling tool is used to drill directly from the process hole to form the heat dissipation channel 23, and finally the process hole is blocked by the sealing piece 234 to prevent cold water leakage;
specifically, the heat dissipation channel 23 is C-shaped or -shaped;
as shown in fig. 4-5, the water inlet 24 and the water outlet 25 are provided with a waterway adapter 26;
on the lens holder main body 2, the water inlet 24 and the water outlet 25 are arranged on opposite sides of the high-power laser lens 1, and the water inlet 24 and the water outlet 25 are symmetrically arranged up and down;
as shown in fig. 6, the circulating heat exchange structure, the waterway adapter 26 and the heat dissipation channel 23 are designed to be semi-surrounding structures, so that the circulating heat exchange structure can further perform uninterrupted cooling heat exchange on the lens base main body 2 in a cold water circulating flow mode, thereby realizing heat dissipation of the high-power laser lens 1.
Specifically, as shown in fig. 2, the lens base main body 2 is further provided with a thermo-detector lens disposed on the same side as the water inlet 24, and the thermo-detector lens includes an infrared temperature probe 6 facing the high-power laser lens 1; the lens of the temperature detector is fixed on the lens seat main body 2 through a mounting plate 7 and a fastening piece;
the lens of the temperature detector and the infrared temperature probe 6 are arranged to better monitor the temperature change on the high-power laser lens 1 so as to better protect the high-power laser lens 1, thereby ensuring the stability of laser transmission; when the temperature of the high-power laser lens 1 is higher, the radiation energy is stronger, the more infrared rays are radiated, and the higher the temperature detected by the infrared temperature probe 6 is; when the heat energy on the high-power laser lens 1 is uniformly conducted to the lens holder main body 2 through the diamond sheet 12, the temperature detected by the infrared temperature probe 6 is reduced.
Specifically, the lens holder main body 2 is further provided with a temperature sensor 8 located above the high-power laser lens 1, the temperature sensor 8 is used for detecting the temperature change of the lens holder main body 2, and the temperature sensor 8 is fixed through a mounting plate 9;
the bottom of the lens holder main body 2 is connected with a fixed base 27, and the fixed base 27 is used for fixing the lens holder main body 2 in the laser; the fixing base 27 and the lens base main body 2 can be connected into a whole by welding and fastening connection, or can be directly formed into a whole by casting technology.
In order to enable the high-power laser lens 1 to penetrate high-power laser light and solve the problem of excessive temperature in the lens moment, three heat dissipation modes are provided in the embodiment, wherein the first heat dissipation mode is to dissipate heat of the high-power laser lens 1 through the cavity 21, the second heat dissipation mode is to quickly conduct heat energy to the lens base main body 2 through the diamond sheet 12 for heat dissipation, and the third heat dissipation mode is to further perform uninterrupted cooling heat exchange on the lens base main body 2 through the circulating heat exchange structure in a cold water circulating flow mode, so that heat dissipation of the high-power laser lens 1 is finally achieved, and the service life of the high-power laser lens 1 is prolonged.
Example 2
Features not explained in this embodiment are explained in embodiment 1, and will not be described in detail here. This embodiment differs from embodiment 1 in that:
the lens layer 11 is a beam expanding lens, a shaping lens or a window lens;
in this embodiment, the lens layer 11 is attached to the diamond layer 12, so that the high-power laser lens 1 may be a beam expanding lens, a shaping lens, a window lens, or a lens attached to the diamond layer 12; therefore, the embodiment can solve the heat dissipation problem of the high-power laser lens 1 for single-beam high-power laser.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. 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 invention in any way.
Claims (10)
1. The heat radiation structure of the high-power laser lens comprises a lens seat main body and is characterized in that the lens seat main body is made of a high heat conduction material;
the high-power laser lens comprises a lens layer and a diamond sheet layer which are sequentially arranged, and the diamond sheet layer covers one side surface of the lens layer;
the lens seat main body is provided with a cavity for incidence of a laser beam; the high-power laser lens is arranged on one side of the lens seat main body through a pressing sheet and is formed into the side wall of the cavity, and the diamond sheet layer is in fit connection with the lens seat main body; the light energy of the laser beam lost on the high-power laser lens is converted into heat energy, and the heat energy is uniformly transmitted to the lens seat main body through the diamond sheet layer; a circulating heat exchange structure is arranged in the mirror seat main body; the circulating heat exchange structure comprises a heat dissipation channel, a water inlet and a water outlet which are communicated with the heat dissipation channel;
a suction hole is also arranged on the lens seat main body; one end opening of the suction hole is positioned between the lens layer and the diamond sheet layer, and the other end opening of the suction hole is connected with a miniature vacuum pump through a vacuum suction pipe.
2. The heat dissipating structure of a high power laser lens of claim 1 wherein said lens layer is a brewster lens; the first laser beam and the second laser beam are respectively incident from different mirror surfaces of the high-power laser lens, and emergent light of the first laser beam after passing through the high-power laser lens and emergent light of the second laser beam after passing through the high-power laser lens are combined and output.
3. The heat dissipating structure of a high power laser lens of claim 1, wherein said lens layer is a beam expanding lens, or a shaping lens, or a window lens.
4. The heat dissipating structure of a high power laser lens of claim 1, wherein said diamond sheet has a thickness of 0.05-1mm.
5. The heat dissipation structure of a high power laser lens according to claim 1, wherein a window frame for placing the high power laser lens is provided on the lens holder main body; the window frame is of a hollow structure, and a window communicated with the cavity is formed in the middle of the window frame; a hole is formed in the middle of the pressing sheet; the edge of the pressing sheet is also provided with a plurality of mounting hole sites.
6. The heat dissipating structure of a high power laser lens of claim 5 wherein said window is circular, elliptical or polygonal in shape; round notches are formed in corners of the window frame; the frame edge of the window frame is provided with an inclined angle which is inclined inwards; the area of the hole is smaller than the mirror surface area of the high-power laser lens.
7. The heat dissipation structure of a high power laser lens according to claim 1, wherein, inside the lens holder main body, the heat dissipation channel is a semi-surrounding structure; the heat dissipation 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 cavity to the bottom of the cavity along the height of the lens seat main body.
8. The heat dissipating structure of claim 7 wherein said first flow path extends from a water inlet to one end of said second flow path and said third flow path extends from the other end of said second flow path to a water outlet.
9. The heat dissipation structure of a high power laser lens as claimed in claim 7, wherein the heat dissipation channel is C-shaped or -shaped; waterway adapters are arranged on the water inlet and the water outlet; the water inlet and the water outlet are arranged on opposite sides of the high-power laser lens on the lens seat main body, and are symmetrically arranged up and down; the suction hole is connected with a vacuum suction pipe through a suction pipe connector.
10. The heat radiation structure of a high power laser lens according to claim 1, wherein the lens base main body is further provided with a temperature detector lens arranged on the same side as the water inlet, and the temperature detector lens comprises an infrared temperature probe facing the high power laser lens; the lens of the temperature detector is fixed on the lens seat main body through a mounting plate and a fastening piece; the lens seat main body is also provided with a temperature sensor positioned above the high-power laser lens, and the temperature sensor is fixed through a mounting piece; the bottom of the lens seat main body is connected with a fixed base.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311346580.5A CN117353138B (en) | 2023-10-17 | Heat radiation structure of high-power laser lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311346580.5A CN117353138B (en) | 2023-10-17 | Heat radiation structure of high-power laser lens |
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| CN117353138B CN117353138B (en) | 2024-06-04 |
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