Laser absorption device and laser equipment

Abstract

The utility model discloses a laser absorption device and laser equipment, and relates to the technical field of laser equipment. The laser absorption device comprises an absorption trap and a baffle, one end of the absorption trap is open, the other end is closed, and the inner wall of the absorption trap is used for absorbing light; the baffle covers the opening, a mounting hole for placing the concave lens is formed in the baffle, and the mounting hole penetrates through the baffle in the thickness direction of the baffle and is communicated with the opening; the absorption well comprises at least three plate-shaped structures, the at least three plate-shaped structures are arranged in the circumferential direction of the absorption well, in the first section, the inner wall of the absorption well is provided with a first angle at the position of the closed end, and the first section is parallel to the length direction of the absorption well. The laser absorption device achieves the purposes of simplifying the structure and improving the heat absorption efficiency.

Description

Technical Field

[0001] This application relates to the field of laser equipment technology, and in particular to a laser absorption device and a laser device. Background Technology

[0002] High-power laser equipment generates a large amount of excess laser light during operation, which is not the final output. A laser absorption device is needed to collect and absorb this unwanted light. For excess laser light generated inside the laser equipment, a common practice is to place a laser absorption device in the optical path from which the excess laser light is generated. This device then converts the excess laser light into heat through water cooling or other thermal contact methods, which is then absorbed by the laser equipment's own heat dissipation system.

[0003] In this type of laser absorption device in the related technology, the absorption trap is cylindrical, and the structure is relatively complex by setting a conical reflector at the end of the absorption trap. When the laser enters the absorption trap, the laser beam is mainly reflected by the reflector to the inner wall of the absorption trap and absorbed. This is not conducive to the uniform distribution of energy, resulting in low heat absorption and heat dissipation efficiency, and it is impossible to achieve the goal of simplifying the structure and improving heat absorption efficiency at the same time. Utility Model Content

[0004] The embodiments of this application provide a laser absorption device and laser equipment that can both simplify the structure and improve the heat absorption efficiency.

[0005] In a first aspect, embodiments of this application provide a laser absorption device, including an absorption trap and a baffle. The absorption trap has an open end and a closed end, and its inner wall is used to absorb light. The baffle is disposed over the opening and has a mounting hole for placing a concave lens. The mounting hole extends through the baffle along its thickness direction and communicates with the opening. The absorption trap includes at least three plate-like structures arranged circumferentially along the absorption trap. In a first cross-section, the inner wall of the absorption trap has a first angle at the closed end, and the first cross-section is parallel to the length direction of the absorption trap.

[0006] In some embodiments, the absorption trap includes a first plate, a second plate, and two third plates connected between the first plate and the second plate, the two third plates being parallel to the first cross section in pairs; the first plate intersects the axis of the mounting hole, and within the first cross section, the first plate, the second plate, and the baffle form a polygon, with one corner of the polygon located at the closed end being the first angle.

[0007] In some embodiments, within the first cross-section, the first plate, the second plate, and the baffle form a triangle, the apex of which is the first angle.

[0008] In some embodiments, within the first cross-section, the first plate, the second plate, and the baffle form an isosceles triangle, and the axis of the mounting hole is collinear with the perpendicular bisector of the isosceles triangle.

[0009] In some embodiments, within the first cross-section, the first plate, the second plate, and the baffle form a right-angled triangle, and the axis of the mounting hole is parallel to the hypotenuse of the right-angled triangle.

[0010] In some embodiments, the second plate includes a first sub-plate and a second sub-plate, the second sub-plate being connected to the side of the first sub-plate near the closed end, the first sub-plate intersecting with the second sub-plate, the first sub-plate being parallel to the first plate, and the second sub-plate forming the first angle with the first plate.

[0011] In some embodiments, the first plate is provided with a first cooling channel, which is a planar spiral channel or a zigzag channel; the second plate is provided with a second cooling channel, which is a planar spiral channel or a zigzag channel.

[0012] In some embodiments, the first angle ranges from 3° to 10°.

[0013] In some embodiments, from the opening of the absorption trap to the closed end, the mounting hole sequentially includes a first hole segment, a second hole segment, and a third hole segment, wherein the diameter of the second hole segment is larger than the diameter of the third hole segment; a lens retainer is screwed into the first hole segment, the lens retainer being used to prevent the concave lens from moving away from the closed end.

[0014] In some embodiments, the baffle is provided with a lens cooling channel that extends circumferentially along the mounting hole and whose two ends penetrate the sidewall of the baffle and communicate with the outside.

[0015] Compared to the structure of a cylindrical absorption trap, the laser absorption device provided in this application embodiment designs the absorption trap with one open end and the other closed end. In a first cross-section, the closed end forms a first angle, and the first cross-section is parallel to the length direction of the absorption trap. In this way, in a cross-section perpendicular to the length direction of the absorption trap, the size of the open end of the absorption trap is larger than the size of the closed end. That is, the absorption trap is in the form of a pyramid or near-pyramidal structure, which increases the area on which the light diverged by the concave lens directly illuminates the inner wall of the absorption trap. This allows the light diverged by the concave lens to be more uniformly illuminated on the inner wall of the absorption trap and directly absorbed. Thus, while improving the heat absorption efficiency, the structure of the absorption trap is simplified, thereby achieving the goal of balancing structural simplification and improved heat absorption efficiency.

[0016] Secondly, embodiments of this application also provide a laser device, including the laser absorption device as described in the first aspect.

[0017] The structure and effects of the laser absorption device in the laser equipment provided in this application are the same as those of the laser absorption device in the first aspect, and will not be repeated here. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the laser absorption device in Embodiment 1 of this application;

[0020] Figure 2 for Figure 1 An exploded view of the laser absorption device in the image from one perspective;

[0021] Figure 3 for Figure 1 A three-dimensional cross-sectional view of the laser absorption device at section A;

[0022] Figure 4 for Figure 1 A cross-sectional view of the laser absorption device at section A;

[0023] Figure 5 This is a perspective view of the absorption trap structure in some embodiments of this application;

[0024] Figure 6 This is a structural perspective view of the baffle in some embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the laser absorption device in Embodiment 2 of this application;

[0026] Figure 8 for Figure 7 A cross-sectional view of the laser absorption device at section B;

[0027] Figure 9 This is a schematic diagram of the laser absorption device in Embodiment 3 of this application;

[0028] Figure 10 for Figure 9 The laser absorption device is shown in a planar cross-sectional view at section C.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. First cooling channel; 2. Second cooling channel; 3. Lens cooling channel;

[0031] 10. Baffle; 11. Mounting hole; 111. First hole section; 112. Second hole section; 113. Third hole section; 12. Concave lens; 13. Lens retainer; 14. Clearance hole;

[0032] 20. Absorption trap; 201. Opening; 202. Closed end; 21. First plate; 22. Second plate; 221. First sub-plate; 222. Second sub-plate; 23. Third plate. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0037] High-power laser equipment generates a large amount of excess laser light during operation, which is not the final output. A laser absorption device is needed to collect and absorb this unwanted light. For excess laser light generated inside the laser equipment, a common practice is to place a laser absorption device in the optical path from which the excess laser light is generated. This device then converts the excess laser light into heat through water cooling or other thermal contact methods, which is then absorbed by the laser equipment's own heat dissipation system.

[0038] In this type of laser absorption device in the related technology, the absorption trap is cylindrical, and the structure is relatively complex by setting a conical reflector at the end of the absorption trap. When the laser enters the absorption trap, the laser beam is mainly reflected by the reflector to the inner wall of the absorption trap and absorbed. This is not conducive to the uniform distribution of energy, resulting in low heat absorption and heat dissipation efficiency, and it is impossible to achieve the goal of simplifying the structure and improving heat absorption and heat dissipation efficiency at the same time.

[0039] To address the issues of low heat absorption and heat dissipation efficiency and complex structure of laser absorption devices for high-power lasers in related technologies, this application provides a laser absorption device and a laser device. The laser device includes a laser absorption device. Typically, the laser absorption device is placed in the optical path where excess laser light is generated, and the excess laser light is converted into heat by water cooling or other thermal contact methods, which is then absorbed by the heat dissipation system of the laser device itself.

[0040] It should be noted that the aforementioned laser equipment can be either a laser or a laser detection device, and no specific limitation is made here.

[0041] Figures 1-6 The structure of the laser absorption device in Embodiment 1 is shown. Figure 2 , Figure 3 and Figure 4 As shown, the laser absorption device includes an absorption trap 20 and a baffle 10. The absorption trap 20 has an open end 201 and a closed end 202. The inner wall of the absorption trap 20 is used to absorb light. The baffle 10 covers the opening 201 and has an opening on the baffle 10 for placing a concave lens 12. Figure 3 and Figure 4 Mounting hole 11 (not shown) penetrates baffle 10 along its thickness direction and communicates with opening 201; absorption trap 20 includes at least three plate-like structures arranged circumferentially along the absorption trap 20. In a first cross-section, the inner wall of absorption trap 20 has a first angle at the closed end 202. The first cross-section is parallel to the length direction of absorption trap 20. That is, in the first cross-section, baffle 10 and the inner wall of absorption trap 20 form a polygon, and one angle of the polygon at the closed end 202 is the first angle.

[0042] The inner wall of the absorption trap 20 mainly serves to absorb the light emitted by the laser. Typically, a black absorption layer is coated on the inner wall of the absorption trap 20 to absorb the light that strikes it.

[0043] The first section is Figure 1 The cross section at the location of the dashed line A.

[0044] The function of the concave lens 12 described above is to diffuse light. The concave lens 12 can be, for example... Figure 8 The plano-concave lens shown can also be a biconcave lens. Figure 4 The flared dashed line indicates the approximate edge of the diffused light rays after passing through the concave lens 12.

[0045] The length direction of the absorption trap 20 is parallel to the thickness direction of the baffle 10.

[0046] Compared to the cylindrical absorption trap 20, by designing the absorption trap 20 with one open end 201 and the other closed end 202, and within the first cross-section, the closed end 202 forms a first angle, and the first cross-section is parallel to the length direction of the absorption trap 20, the size of the end of the absorption trap 20 with the open end 201 is larger than the size of the closed end 202 within the cross-section perpendicular to the length direction of the absorption trap 20. In other words, the absorption trap 20 has a pyramidal or near-pyramidal structure, which increases the area on the inner wall of the absorption trap 20 where the light diverged by the concave lens 12 directly shines. This allows the light diverged by the concave lens 12 to shine more evenly on the inner wall of the absorption trap 20 and be directly absorbed. Thus, while improving the heat absorption efficiency, the structure of the absorption trap 20 is simplified, thereby achieving the goal of balancing structural simplification and improved heat absorption efficiency.

[0047] It should be noted that the mounting hole 11 can be a circular hole, in which case the outer contour of the concave lens 12 is also circular. Of course, the size of the mounting hole 11 needs to match the size of the concave lens 12. There are no specific limitations on the shape of the mounting hole 11 or the shape of the outer contour of the concave lens 12. The structure of the mounting hole 11 will be described in detail later. The concave lens 12 is detachably connected to the mounting hole 11, facilitating the replacement and maintenance of the concave lens 12.

[0048] Of course, to improve the laser absorption effect, the surface can be sandblasted to a frosted finish, or microstructures such as grooves and protrusions can be set on the inner wall.

[0049] Typically, the substrate of the absorption trap 20 is made of T2 copper, and then different coatings are applied to its surface. For example, the inner wall surface of the absorption trap 20 is coated with titanium aluminum nitride to absorb laser light.

[0050] like Figure 2 and Figure 4 As shown, in this embodiment, the absorption trap 20 includes a first plate 21, a second plate 22, and two third plates 23 connected between the first plate 21 and the second plate 22. The two third plates 23 are parallel to each other in the first cross section. The first plate 21 intersects the axis of the mounting hole 11. In the first cross section, the first plate 21 and the second plate 22 intersect at the closed end 202 to form a first angle. That is, in the case of... Figure 4 Within the first cross section, the inner walls of the first plate 21 and the second plate 22 intersect at the closed end 202 to form a first angle, that is, the baffle 10, the first plate 21 and the second plate 22 are arranged in the first cross section to form a polygon, such as a triangle or a quadrilateral.

[0051] It should be noted that since the baffle 10 needs to cover the opening 201 of the absorption trap 20, the area of ​​the baffle 10 is usually larger than the area of ​​the opening 201. That is, the polygon here is only an approximate polygon, not a geometrically standard polygon.

[0052] For example, such as Figure 4 As shown, within the first cross section, the first plate 21, the second plate 22, and the baffle 10 form a triangle, with the apex angle of the triangle being the first angle.

[0053] This simplifies the structure of the absorption trap 20, making it easier to assemble and improving the assembly accuracy of the absorption trap 20.

[0054] like Figure 4 As shown, in some embodiments, within the first cross section, the first plate 21, the second plate 22, and the baffle 10 form an isosceles triangle, with the vertex angle of the isosceles triangle being the first angle, and the axis of the mounting hole 11 being collinear with the perpendicular bisector of the isosceles triangle.

[0055] With the above configuration, the laser light emitted by the concave lens 12 can be symmetrically and uniformly irradiated on the inner walls of the first plate 21 and the second plate 22 and absorbed, thereby improving the uniformity of heat irradiation on the inner wall of the absorption trap 20 and thus improving the heat absorption efficiency of the absorption trap 20.

[0056] Of course, the baffle 10, the first plate 21, and the second plate 22 can form a triangle or a quadrilateral within the first cross section, as in the structure of the absorption trap 20 in the laser absorption device of Embodiment 3, where one corner of the polygon located at the closed end 202 is the first corner. The structure of the absorption trap 20 in Embodiment 3 will be described in detail later.

[0057] In the structural design of the absorption trap 20, the angle of the first angle is also an important parameter. If the first angle is too small, the lengths of the first plate 21 and the second plate 22 will be too long, which is not conducive to the miniaturization design of the absorption trap 20. If the first angle is too large, although it will reduce the lengths of the first plate 21 and the second plate 22, which is beneficial to the miniaturization of the absorption trap 20, when the laser power is high, it will cause the irradiation to be too concentrated on the inner wall of the absorption trap 20, thereby reducing the heat absorption efficiency of the absorption trap 20. When the first angle is in the range of 3° to 10°, the absorption trap 20 can not only meet the absorption efficiency requirements of high-power lasers, but also achieve the goal of miniaturization of the absorption trap 20.

[0058] like Figure 4 and Figure 5 As shown, in some embodiments, the first plate 21 is provided with a first cooling channel 1, which is a zigzag channel or a broken-line channel. The second plate 22 is provided with a second cooling channel 2, and the structure of the second cooling channel 2 is the same as that of the first channel.

[0059] The above broken lines are multiple lines connected in sequence, with an angle between adjacent lines.

[0060] It should be noted that the inlet and outlet of the first cooling channel 1 and the second cooling channel 2 are located on the side of the first plate 21 and the second plate 22 near the closed end 202. This facilitates full utilization of the space of the closed end 202, thereby reducing the overall space occupied by the laser absorption device.

[0061] Of course, the first channel can be either a polygonal channel or a planar spiral channel, and the structure of the second channel can also be different from that of the first channel. No specific restrictions are made here.

[0062] like Figure 4 As shown, in this embodiment, from the opening 201 of the absorption trap 20 to the closed end 202, the mounting hole 11 sequentially includes a first hole segment 111, a second hole segment 112, and a third hole segment 113, wherein the diameter of the second hole segment 112 is larger than the diameter of the third hole segment 113; the first hole segment 111 is used for screwing a lens retaining ring 13 (not shown in this embodiment, refer to the appendix in Embodiment 2). Figure 8 and the appendix in Example 3 Figure 10 (In the structure), the lens retainer 13 is used to prevent the concave lens 12 from moving away from the closed end 202. That is, as in... Figure 4 The lens retainer 13 is located on the left side of the concave lens 12, and the right side of the concave lens 12 abuts against the connection between the second hole segment 112 and the third hole segment 113, and the right side abuts against the lens retainer 13.

[0063] The lens retainer 13 mentioned above is also called an external threaded retainer, or simply a threaded retainer.

[0064] By screwing a lens retainer 13 into the first hole section 111, the rotation of the lens retainer 13 relative to the mounting hole 11 is converted into axial movement of the lens retainer within the mounting hole 11. This allows for adjustment of the distance between the lens retainer 13 and the concave lens 12, facilitating not only the assembly and disassembly of the lens retainer 13 and the concave lens 12, but also enabling better control of the installation accuracy of the concave lens 12 by adjusting the depth of the lens retainer 13 and its fit with the concave lens 12. Furthermore, this allows the mounting hole 11 to accommodate concave lenses 12 of varying thicknesses within a certain range. When assembling the concave lens 12 with the mounting hole 11, one side of the concave lens 12 stops at the third hole section 113, while the other side abuts against the lens retainer 13. This ensures that the concave lens 12 is securely installed while allowing for easy replacement.

[0065] like Figure 3 and 6 As shown, in some embodiments, the baffle 10 is provided with a lens cooling channel 3, which extends circumferentially along the mounting hole 11, and both ends of the lens cooling channel 3 penetrate the side wall of the baffle 10 and communicate with the outside.

[0066] The aforementioned lens cooling channel 3, by supplying cooling substances, such as coolant, to the lens cooling channel 3, serves to cool the concave lens 12.

[0067] By providing a lens cooling channel 3 along the circumference of the mounting hole 11 on the baffle 10, the concave lens 12 can be cooled by supplying cooling material to the lens cooling channel 3, thereby extending the service life of the concave lens 12.

[0068] It should be noted that the two ends of the lens cooling channel 3 typically extend to the same sidewall of the baffle 10. Therefore, when connecting connectors to external equipment at the inlet and outlet locations of the lens cooling channel 3, installation space can be reserved only at the inlet and outlet locations of the lens cooling channel 3 on the baffle 10, which helps reduce the space occupied by the laser absorption device. For example, as... Figure 3 As shown, within the first cross-section, the inlet and outlet at both ends of the lens cooling channel 3 are located at the baffle 10. Figure 6 The upper side of the device. This helps to further reduce the space occupied by the laser absorption device.

[0069] Figure 7 and Figure 8 A structural diagram of the laser absorption device in Embodiment 2 is shown. The main difference between the laser absorption device in Embodiment 2 and the laser absorption device in Embodiment 1 is that the shape of the absorption trap 20 in the first cross section and the position of the axis of the mounting hole 11 relative to the absorption trap 20 are different. At the same time, the structure at the mounting hole 11 is also different.

[0070] like Figure 7 and Figure 8 As shown, within the first cross-section (e.g.) Figure 7 (The section containing the dashed line B), the first plate 21, the second plate 22, and the baffle 10 form a right triangle, and the axis of the mounting hole 11 is parallel to the hypotenuse of the right triangle. That is, within the first section, the first plate 21 is perpendicular to the baffle 10, and the second plate 22 is parallel to the axis of the mounting hole 11.

[0071] The above-mentioned design simplifies the structure of the absorption trap 20, facilitates its assembly, and thus helps to improve the assembly accuracy of the absorption trap 20.

[0072] like Figure 8 As shown, in this embodiment, the axis of the mounting hole 11 is inclined relative to the thickness direction of the baffle 10. An avoidance hole 14 is provided on the side of the mounting hole 11 away from the closed end 202. The avoidance hole 14 is coaxially arranged with the mounting hole 11 and connected to it. The avoidance hole 14 is used to place the concave lens 12 and the lens retainer.

[0073] The above configuration not only facilitates the installation of the concave lens 12 and the lens retainer, but also ensures that the light passing through the concave lens 12 can be evenly absorbed onto the inner wall of the absorption trap 20.

[0074] The structure of the mounting hole 11 and the lens retainer are the same as those in the embodiment, and will not be described again here.

[0075] By screwing a lens retainer at the second hole section 112, not only is the rotation of the lens retainer relative to the mounting hole 11 converted into axial movement of the lens retainer within the mounting hole 11, allowing the distance between the lens retainer and the concave lens 12 to be adjusted, thus facilitating the assembly and disassembly of the lens retainer and the concave lens 12, but also, since no components are provided at the second hole section 112, the lens retainer can be effectively protected, thereby reducing the impact on the lens retainer and the concave lens 12 and helping to control the installation accuracy of the concave lens 12.

[0076] It should be noted that, in this embodiment, the structure of the third plate 23 in the absorption trap 20 needs to be changed accordingly based on the structures of the first plate 21 and the second plate 22. Meanwhile, the structure of the baffle 10, except for the mounting hole 11, is the same as that of the baffle 10 in Embodiment 1, and will not be described again here.

[0077] Figure 9 and Figure 10 A structural diagram of the laser absorption device in Embodiment 3 is shown. The main difference between the laser absorption device in Embodiment 3 and the laser absorption device in Embodiment 1 is that the shape of the absorption trap 20 in the first cross section is different.

[0078] like Figure 9 and Figure 10 As shown, the second plate 22 includes a first sub-plate 221 and a second sub-plate 222. The second sub-plate 222 is connected to the side of the first sub-plate 221 near the closed end 202. The first sub-plate 221 and the second sub-plate 222 intersect, and the first sub-plate 221 is parallel to the first plate 21, that is, the first sub-plate 221 and the first plate 21 have the same inclination direction relative to the axis of the mounting hole 11. The second sub-plate 222 forms a first angle with the first plate 21. That is, in the first cross-section (e.g., Figure 9 Within the section where the dashed line C is located, the baffle 10, the first plate 21 and the second plate 22 form a quadrilateral, and one corner of the quadrilateral located at the closed end 202 is the first corner.

[0079] Thus, the dimensions of the first plate 21 and the second plate 22 can be designed as needed so that light can be evenly absorbed on the inner walls of the first plate 21 and the second plate 22.

[0080] The first sub-plate 221 and the second sub-plate 222 can be an integral structure, which simplifies the structure of the second plate 22, improves its strength, and facilitates the assembly of the absorption trap 20. When the first sub-plate 221 and the second sub-plate 222 are an integral structure, the area of ​​the first sub-plate 221 is larger than that of the second sub-plate 222. The second cooling channel 2 is mainly set on the first sub-plate 221, and the second sub-plate 222 only has two sub-channels that connect the two ends of the second cooling channel 2 to the inlet and outlet. In this way, it can not only effectively reduce the temperature of the absorption trap 20, but also simplify the process.

[0081] It should be noted that, in this embodiment, the structures of the first plate 21 and the third plate 23 in the absorption trap 20 need to be changed accordingly based on the structures of the first sub-plate 221 and the second sub-plate 222. Meanwhile, the structure of the baffle 10 is the same as that of the baffle 10 in Embodiment 1, and will not be described again here.

[0082] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A laser absorption device, characterized in that, include: An absorption trap (20) has an open end (201) and a closed end (202) at the other end. The inner wall of the absorption trap (20) is used to absorb light. A baffle (10) is provided at the opening (201). The baffle (10) has a mounting hole (11) for placing a concave lens (12). The mounting hole (11) passes through the baffle (10) along the thickness direction and is connected to the opening (201). The absorption trap (20) includes at least three plate-shaped structures arranged circumferentially along the absorption trap (20). In a first cross section, the inner wall of the absorption trap (20) has a first angle at the closed end (202). The first cross section is parallel to the length direction of the absorption trap (20).

2. The laser absorption device according to claim 1, characterized in that, The absorption trap (20) includes a first plate (21), a second plate (22), and two third plates (23) connected between the first plate (21) and the second plate (22). The two third plates (23) are parallel to the first cross section. The first plate (21) intersects the axis of the mounting hole (11). In the first cross section, the first plate (21), the second plate (22), and the baffle (10) form a polygon. One corner of the polygon located at the closed end (202) is the first corner.

3. The laser absorption device according to claim 2, characterized in that, Within the first cross section, the first plate (21), the second plate (22), and the baffle (10) form a triangle, with the apex angle of the triangle being the first angle.

4. The laser absorption device according to claim 3, characterized in that, Within the first cross section, the first plate (21), the second plate (22), and the baffle (10) form an isosceles triangle, and the axis of the mounting hole (11) is collinear with the perpendicular bisector of the isosceles triangle. Within the first cross section, the first plate (21), the second plate (22), and the baffle (10) form a right triangle, and the axis of the mounting hole (11) is parallel to the hypotenuse of the right triangle.

5. The laser absorption device according to claim 2, characterized in that, The second plate (22) includes a first sub-plate (221) and a second sub-plate (222). The second sub-plate (222) is connected to the side of the first sub-plate (221) near the closed end (202). The first sub-plate (221) intersects with the second sub-plate (222). The first sub-plate (221) is parallel to the first plate (21). The second sub-plate (222) forms the first angle with the first plate (21).

6. The laser absorption device according to any one of claims 2 to 5, characterized in that, The first plate (21) is provided with a first cooling channel (1), which is a planar spiral channel or a zigzag channel; And / or, the second plate (22) is provided with a second cooling channel (2), which is a planar spiral channel or a zigzag channel.

7. The laser absorption device according to any one of claims 1 to 5, characterized in that, The first angle ranges from 3° to 10°.

8. The laser absorption device according to any one of claims 1 to 4, characterized in that, From the opening (201) of the absorption trap (20) to the closed end (202), the mounting hole (11) sequentially includes a first hole segment (111), a second hole segment (112) and a third hole segment (113), the diameter of the second hole segment (112) is larger than the diameter of the third hole segment (113); a lens retainer (13) is screwed into the first hole segment (111), the lens retainer (13) is used to prevent the concave lens (12) from moving away from the closed end (202).

9. The laser absorption device according to any one of claims 1 to 4, characterized in that, The baffle (10) is provided with a lens cooling channel (3), which extends circumferentially along the mounting hole (11). Both ends of the lens cooling channel (3) penetrate the side wall of the baffle (10) and communicate with the outside.

10. A laser device, characterized in that, include: The laser absorption device as described in any one of claims 1 to 9.

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