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, a baffle, a mounting seat and a plurality of blocking absorption pieces, wherein the absorption trap is provided with a first end and a second end; the baffle covers the first end, and a mounting hole communicated with the first end is formed in the baffle; the mounting seat covers the second end; the plurality of blocking absorption parts are arranged in the absorption well at intervals along the axial direction of the absorption well; light through holes are formed in part or all of the blocking absorption parts, the areas of the light through holes are gradually reduced in the direction from the first end to the second end, the light through hole of the blocking absorption part located at the first position is the largest light through hole, and the orthographic projection of the largest light through hole on the baffle covers the mounting hole; the light through hole of the blocking absorption piece located at the last position is the minimum light through hole, and in the first section, the included angle between the connecting line between the maximum light through hole and the minimum light through hole and the axial direction of the absorption well is in negative correlation with the divergence angle of the concave lens.

Description

Technical Field

[0001] The present application relates to the technical field of laser equipment, and in particular to a laser absorption device and laser equipment. Background Art

[0002] During operation, high-power laser equipment generates a significant amount of excess laser light, which is not the final output. Therefore, a laser absorption device is required to collect and absorb this unnecessary light. For this excess laser light generated within the laser equipment, a common practice is to install a laser absorption device in the optical path of the laser. This device, through water cooling or other thermal contact methods, converts the excess laser light into heat, which is then absorbed by the laser equipment's internal cooling system.

[0003] This type of laser absorption device in the related art employs a conical reflector at the end of an absorption well. After the laser enters the well, a portion of the light is directly absorbed by the inner wall of the well, while the remaining portion is reflected by the reflector and absorbed by the inner wall. However, due to the small reflective surface at the tip of the reflector, the laser light cannot be effectively diffused and reflected. Consequently, the light energy received by certain areas of the inner wall of the well is relatively concentrated, which is not conducive to uniform energy dispersion and results in low heat absorption and heat dissipation efficiency. When the probability of laser light is high, the energy density of the absorption well is too high, causing damage to the absorption layer. Utility Model Content

[0004] The embodiments of the present application provide a laser absorption device and a laser equipment, which are used to solve the problems in the related art that the laser absorption device has low heat absorption and heat dissipation efficiency and is easily damaged when absorbing and dissipating high-power lasers.

[0005] In the first aspect, an embodiment of the present application provides a laser absorption device, comprising an absorption well, a baffle, a mounting seat and a plurality of baffle absorption members, the absorption well having a first end and a second end, the first end for a first light to enter an absorption cavity of the absorption well; the inner wall of the absorption well is used to absorb the first light; the baffle cover is provided at the first end, a mounting hole for placing a concave lens is provided on the baffle, the mounting hole passes through the baffle along the axial direction of the absorption well and is connected to the first end; the mounting seat cover is provided at the second end; a plurality of baffle absorption members are arranged in the absorption well at intervals along the axial direction of the absorption well, the baffle absorption members are used to absorb the light irradiated on the A portion of the first light is reflected on the surface of the blocking and absorbing member, and another portion of the first light is absorbed; a light-through hole for the first light to pass through is opened on part or all of the blocking and absorbing members, and the areas of the light-through holes decrease successively from the first end to the second end, the light-through hole of the blocking and absorbing member located at the first position is the largest light-through hole, and the light-through hole of the blocking and absorbing member located at the last position is the smallest light-through hole, and the orthographic projection of the largest light-through hole on the baffle covers the mounting hole; the angle formed by the line connecting the largest light-through hole and the smallest light-through hole and the axial direction of the absorption well is negatively correlated with the divergence angle of the concave lens.

[0006] In some embodiments, the baffle absorber is a truncated cone structure with a hollow cavity. The hollow cavity is a truncated cone structure. The light-through hole is provided at the small end of the baffle absorber, and the large end of the baffle absorber is connected to the inner wall of the absorption well.

[0007] In some embodiments, the blocking and absorbing member includes a reflecting surface close to the first end and an absorbing surface close to the second end, the reflecting surface is used to reflect the first light irradiated on the reflecting surface onto the inner wall of the absorption well; the absorbing surface is used to absorb light.

[0008] In some embodiments, the reflective surface is a diffuse reflective surface.

[0009] In some embodiments, the absorbent surface is a frosted surface.

[0010] In some embodiments, the barrier absorbent has a thickness of 5 mm to 8 mm.

[0011] In some embodiments, in the first cross section, an angle formed between a line connecting the maximum light-through hole and the minimum light-through hole and an axial direction of the absorption well is 20° to 70°.

[0012] In some embodiments, the mounting seat includes a seat body and an end cover, the seat body is a hollow structure with one end closed and the other end closed, the closed end of the seat body extends into the absorption cavity, the closed end of the seat body is connected to a connecting ear, the connecting ear is stopped at the second end of the absorption trap, and the end cover is provided on the open end of the seat body.

[0013] In some embodiments, the closed end of the seat protrudes toward the first end near the center of the absorption well.

[0014] In some embodiments, the mounting base is a plate-like structure.

[0015] The laser absorption device provided in an embodiment of the present application comprises a plurality of baffle absorbers arranged axially within an absorption well cavity. The areas of the plurality of light-through holes decrease in sequence from the first end to the second end, and the orthographic projection of the largest light-through hole on the baffle plate at the first end overlaps the mounting hole on the baffle plate. Therefore, after the first light beam is diverged by the concave lens and enters the cavity, it is more dispersedly irradiated onto the surfaces of different baffle absorbers. That is, the first light beam is reflected after a second divergence. Thus, a portion of the reflected light beam, after being reflected by the baffle absorber, is again irradiated onto adjacent baffle absorbers and absorbed, while another portion of the reflected light beam is irradiated onto the inner wall of the absorption well and absorbed. This increases the area of the first light beam irradiated onto the surfaces of the baffle absorbers, allowing the reflected light beam, after being reflected by the baffle absorber, to be uniformly irradiated onto the inner wall of the absorption well or onto the surface of adjacent baffle absorbers and absorbed. Thus, the first light beam first undergoes a first divergence through the concave lens before entering the cavity, and then irradiates onto different baffle absorbers. This allows the first light beam, after a second divergence, to be uniformly irradiated or reflected onto the baffle absorbers and the absorption well and absorbed. When the power of the laser increases significantly, the barrier absorption component takes on the role of partially absorbing the first light. The first light is diverged twice, which not only reduces the light directly irradiated on the inner wall of the absorption well and reduces the energy of the absorption well. When the power of the laser increases significantly, the temperature of the absorption well rises slowly, thereby improving the energy absorption and heat dissipation efficiency, and making the light evenly irradiated on the inner wall of the absorption well, reducing the risk of damage to the absorption well when the laser power is large, thereby increasing the service life of the laser absorption device.

[0016] In a second aspect, an embodiment of the present application further provides a laser device comprising the laser absorption device as described in the first aspect.

[0017] The structure and effect achieved by the laser absorption device in the laser equipment provided in the embodiment of the present application are the same as the structure and effect achieved by the laser absorption device in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 Schematic diagram of the structure of the laser absorption device in some embodiments of the present application;

[0020] Figure 2 for Figure 1 An exploded view of the laser absorption device at one viewing angle;

[0021] Figure 3 for Figure 1 Schematic diagram of a portion of the structure of the laser absorption device;

[0022] Figure 4 for Figure 3 The laser absorption device in the AA cross-section diagram;

[0023] Figure 5 for Figure 3 A three-dimensional cross-sectional view of the laser absorption device in the first section.

[0024] Description of reference numerals:

[0025] 1. First channel; 2. Lens cooling channel; 3. Cooling channel;

[0026] 10. Baffle; 11. Mounting hole; 111. First hole section; 112. Second hole section; 113. Third hole section; 12. Concave lens; 13. Lens retaining ring;

[0027] 20, absorption well; 201, first end; 202, second end; 203, cavity; 21, well body; 22, sleeve; 220, through hole; 23, groove;

[0028] 30. Blocking and absorbing member; 301. Light hole; 302. Small end; 303. Large end; 31. Reflecting surface; 32. Absorbing surface;

[0029] 40. Mounting seat; 41. Seat body; 411. Closed end; 412. Open end; 42. End cap; 43. Connecting ear;

[0030] 50. Sealing ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0035] During operation, high-power laser equipment generates a significant amount of excess laser light, which is not the final output. Therefore, a laser absorption device is required to collect and absorb this unnecessary light. For this excess laser light generated within the laser equipment, a common practice is to install a laser absorption device in the optical path of the laser. This device, through water cooling or other thermal contact methods, converts the excess laser light into heat, which is then absorbed by the laser equipment's internal cooling system.

[0036] This type of laser absorption device in the related art employs a conical reflector at the end of an absorption well. After the laser enters the well, a portion of the light is directly absorbed by the inner wall of the well, while the remaining portion is reflected by the reflector and absorbed by the inner wall. However, due to the small reflective surface at the tip of the reflector, the laser light cannot be effectively diffused and reflected. Consequently, the light energy received by certain areas of the inner wall of the well is relatively concentrated, which is not conducive to uniform energy dispersion and results in low heat absorption and heat dissipation efficiency. When the probability of laser light is high, the energy density of the absorption well is too high, causing damage to the absorption layer.

[0037] To address the issues of low heat absorption and heat dissipation efficiency and susceptibility to damage in related-art laser absorption devices for high-power lasers, the present invention provides a laser absorption device and a laser device. The laser device includes a laser absorption device. Typically, the laser absorption device is positioned in the optical path of excess laser light and, through water cooling or other thermal contact methods, converts the excess laser light into heat that is absorbed by the laser device's own heat dissipation system.

[0038] It should be noted that the above-mentioned laser equipment can be a laser or a laser detection equipment, which is not specifically limited here.

[0039] like Figure 1 Figure 2 and Figure 4 As shown, the laser absorption device includes an absorption well 20, a baffle 10, a mounting seat 40 and a plurality of baffle absorbers 30. The absorption well 20 has a first end 201 and a second end 202. The first end 201 allows the first light to enter the absorption cavity 203 of the absorption well 20; the inner wall of the absorption well 20 is used to absorb the first light; the baffle 10 is covered at the first end 201, and a mounting hole 11 for placing a concave lens 12 is opened on the baffle 10. The mounting hole 11 passes through the baffle 10 along the axial direction of the absorption well 20 and is connected to the first end 201; the mounting seat 40 is covered at the second end 202; a plurality of baffle absorbers 30 are arranged in the absorption well 20 along the axial direction of the absorption well 20, and the baffle absorbers 30 are used to absorb the light irradiated on A portion of the first light is reflected on the surface of the blocking and absorbing member 30, and another portion of the first light is absorbed; a light hole 301 is provided on some or all of the blocking and absorbing members 30 for the first light to pass through, and the area of the light hole 301 decreases successively from the first end 201 to the second end 202. The light hole 301 of the blocking and absorbing member 30 located at the first position is the largest light hole 301, and the light hole 301 of the blocking and absorbing member 30 located at the last position is the smallest light hole 301. The orthographic projection of the largest light hole 301 on the baffle 10 covers the mounting hole 11; the angle between the line connecting the largest light hole 301 and the smallest light hole 301 and the axial direction of the absorption well 20 is negatively correlated with the divergence angle of the concave lens 12.

[0040] The absorption well 20 is cylindrical, and its inner wall mainly absorbs the first light emitted by the laser. Usually, a black absorption layer is coated on the inner wall of the absorption well 20, so that the first light irradiated on the absorption layer is absorbed.

[0041] The concave lens 12 provided on the baffle 10 mainly plays the role of diverging the laser light. The laser light is first diverged by the concave lens 12 before entering the cavity 203 of the absorption well 20, which is conducive to making the first light irradiated on the inner wall of the absorption well 20 more uniform.

[0042] The angle between the line connecting the maximum light-through hole 301 and the minimum light-through hole 301 and the axial direction of the absorption well 20 is negatively correlated with the divergence angle of the concave lens 12, which means that when the divergence angle of the parallel light after passing through the concave lens 12 is larger, the angle between the line connecting the maximum light-through hole 301 and the minimum light-through hole 301 and the axial direction of the absorption well 20 is smaller; when the divergence angle of the parallel light after passing through the concave lens 12 is smaller, the angle between the line connecting the maximum light-through hole 301 and the minimum light-through hole 301 and the axial direction of the absorption well 20 is larger.

[0043] The above-mentioned part or all of the blocking and absorbing members 30 are provided with light-through holes 301, including that all of the blocking and absorbing members 30 are provided with light-through holes 301, and also includes that except for the first blocking and absorbing member 30 located near the second end 202, the other blocking and absorbing members 30 are provided with light-through holes 301.

[0044] By arranging a plurality of barrier absorbers 30 in the cavity 203 of the absorption well 20 along the axial direction, the areas of the plurality of light holes 301 decrease in sequence from the first end 201 to the second end 202, and the orthographic projection of the largest light hole 301 on the baffle 10 at the first end 201 covers the mounting hole 11 on the baffle 10. Then, after the first light is diverged by the concave lens 12 and enters the cavity 203, it is more dispersed and irradiated on the surfaces of different barrier absorbers 30, that is, the first light is reflected after being diverged twice. In this way, a part of the reflected light after being reflected by the barrier absorber 30 is again irradiated on the The first light is absorbed by the adjacent barrier absorber 30, and the other part of the reflected light is absorbed after being irradiated on the inner wall of the absorption well 20, thereby increasing the area on which the first light is irradiated on the surface of the barrier absorber 30, so that the reflected light after being reflected by the barrier absorber 30 is evenly irradiated on the inner wall of the absorption well 20 or on the surface of the adjacent barrier absorber 30 and is absorbed. In this way, the first light first passes through the concave lens 12 to achieve the first divergence and then enters the cavity 203, and then irradiates different barrier absorbers 30, so that the first light is evenly irradiated or reflected on the barrier absorber 30 and the absorption well 20 after being diverged twice and is absorbed. When the power of the laser increases significantly, the barrier absorption member 30 takes on the role of partially absorbing the first light. The first light is diverged twice, which not only reduces the light directly irradiated on the inner wall of the absorption well 20, but also reduces the energy of the absorption well 20. When the power of the laser increases significantly, the temperature of the absorption well 20 rises slowly, thereby improving the energy absorption and heat dissipation efficiency, and making the light evenly irradiated on the inner wall of the absorption well 20, reducing the risk of damage to the absorption well 20 when the laser power is large, thereby improving the service life of the laser absorption device.

[0045] It should be noted that the mounting hole 11 can be a circular hole. In this case, the light-through hole 301 on the barrier absorber 30 is also designed as a corresponding circular hole. In this case, the area of the light-through hole 301 decreases from the first end 201 to the second end 202. Alternatively, the diameter of the light-through hole 301 decreases from the first end 201 to the second end 202. Of course, the shape of the light-through hole 301 can also be designed in other shapes, which are not specifically limited here. The following description uses the light-through hole 301 as an example.

[0046] Of course, in order to improve the effect of absorbing laser light, a frosted surface may be formed by sandblasting, or a microstructure such as a combination of grooves and protrusions may be provided on the inner wall.

[0047] like Figure 4 As shown, the number of the blocking and absorbing members 30 is 8, and each of the 8 blocking and absorbing members 30 is provided with a light-through hole 301, which is formed in the direction from the first end 201 to the second end 202. Figure 4From left to right in the figure, the light-through hole 301 on the first blocking and absorbing member 30 is the largest light-through hole 301 , and the light-through hole 301 on the eighth blocking and absorbing member 30 is the smallest light-through hole 301 .

[0048] During the design process of the blocking absorbers 30, the number and thickness of the blocking absorbers 30 and the axial distance between two adjacent blocking absorbers 30 in the absorption well 20 are also important factors, which need to be determined according to the power of the laser and the focal length of the concave lens 12. In addition to the number of 8 blocking absorbers 30, the number of blocking absorbers 30 can also be other numbers, such as 4, 5, 6, 7, 9, 10, 11, 12, etc., which are not specifically limited here.

[0049] The thickness of the barrier absorber 30 is 5 mm to 8 mm. This thickness is a crucial factor in the design of the barrier absorber 30. By properly selecting the thickness of the barrier absorber 30 and satisfying the aforementioned relationship, the first light, after passing through the barrier absorber 30, is more evenly distributed on the inner wall of the absorption well 20.

[0050] like Figure 4 and Figure 5 As shown, in some embodiments, the blocking and absorbing member 30 is a truncated cone structure with a hollow cavity, the hollow cavity is a truncated cone structure, the small end 302 of the blocking and absorbing member 30 is provided with a light-through hole 301, and the large end 303 of the blocking and absorbing member 30 is connected to the inner wall of the absorption well 20.

[0051] By making the barrier absorber 30 into a truncated cone structure with a hollow cavity, the hollow cavity is a truncated cone structure, so that the side wall of the barrier absorber 30 is tilted in the first section, which increases the area for receiving the first light, thereby facilitating the divergence of the first light.

[0052] The above-mentioned barrier absorber 30 includes a reflective surface 31 close to the first end 201 and an absorbing surface 32 close to the second end 202. The reflective surface 31 is used to reflect the first light irradiated on the reflective surface 31 to the inner wall of the absorption well 20; the absorbing surface 32 is used to absorb light.

[0053] The above design makes the paths of the first light more diverse, which is further conducive to making the first light evenly irradiated on the inner wall of the absorption well 20 and the surface of the partition absorption member 30 more uniform.

[0054] It should be noted that the large-mouth end 303 of the baffle absorber 30 and the inner wall of the absorption well 20 can be welded or screwed.

[0055] In some embodiments, the reflective surface 31 is a diffuse reflective surface, so that the light passing through the reflective surface 31 is more uniform.

[0056] In some embodiments, the absorption surface 32 is a frosted surface, which is conducive to the absorption of light.

[0057] It should be noted that whether the reflective surface 31 is a diffuse reflective surface or the absorbing surface 32 is a frosted surface, both can be achieved by sandblasting the base of the barrier absorber 30. Typically, the base of the barrier absorber 30 is T2 copper, and the reflective surface 31 maintains the T2 copper of the base of the barrier absorber 30 to reflect the first light. The absorbing surface 32 of the base is then coated with titanium aluminum nitride to absorb the first light.

[0058] like Figure 4 and Figure 5 As shown, the structures of the eight barrier absorbent members 30 are all frustum structures with a hollow cavity, the hollow cavity is a frustum structure, and the small ends 302 of the eight barrier absorbent members 30 are close to the first end 201; or, the large ends 303 of the eight barrier absorbent members 30 are close to the first end 201; or, the small ends 302 of a part of the barrier absorbent members 30 are close to the first end 201, and the large ends 303 of another part of the barrier absorbent members 30 are close to the first end 201.

[0059] Of course, the structure of the 8 partition absorbers 30 can also be that some of the partition absorbers 30 have a truncated cone structure with a hollow cavity, but the remaining number have a flat plate structure. For example, the structure of the last partition absorber 30 is a flat plate structure, which is not specifically limited here.

[0060] During the optical design of the laser absorption device, the angle between the line connecting the maximum and minimum light-passing holes 301 and the axial direction of the absorption well 20 is a key parameter. When the angle between the line connecting the maximum and minimum light-passing holes 301 and the axial direction of the absorption well 20 is within a range of 20° to 70°, the absorption well 20 achieves high absorption efficiency and maintains the temperature of the laser absorption device.

[0061] like Figure 2 and Figure 5 As shown, in some embodiments, the mounting base 40 includes a base body 41 and an end cover 42. The base body 41 is a hollow structure with one end open and the other end closed. The closed end 411 of the base body 41 extends into the absorption cavity 203. The closed end 411 of the base body 41 is connected to a connecting ear 43. The connecting ear 43 stops at the second opening of the absorption trap 20. The end cover 42 is covered on the open end 412 of the base body 41.

[0062] The closed end 411 of the seat body 41 extends into the cavity 203 of the absorption well 20, making the connection between the seat body 41 and the absorption well 20 more secure; the setting of the connecting ear 43 facilitates connection with the end face of the second end 202 of the absorption well 20.

[0063] The seat body 41 and the connecting ear 43 are an integrated structure, which not only reduces the assembly process of the mounting seat 40 , but also helps to improve the strength of the mounting seat 40 , thereby helping to improve the connection reliability between the mounting seat 40 and the absorption well 20 .

[0064] like Figure 4 and Figure 5 As shown, in some embodiments, when the small end 302 of the barrier absorber 30 is close to the first end 201 , the closed end 411 of the seat body 41 protrudes toward the first end 201 near the center of the absorption well 20 .

[0065] In this way, the firmness of the connection between the base body 41 and the absorption trap 20 is further improved.

[0066] It should be noted that, in addition to being able to protrude toward the first end 201, when the small mouth end 302 of the barrier absorber 30 is close to the second end 202, the closed end 411 of the seat body 41 may also protrude toward the second end 202, or the closed end 411 of the seat body 41 may be designed as a flat plate-like structure, which is not specifically limited here.

[0067] In order to improve the sealing performance of the connection between the first opening of the seat body 41 and the end cover 42, as shown in FIG. Figure 5 As shown, an avoidance groove is provided in the end cover 42 , and a sealing ring 50 is provided in the avoidance groove. When the seat body 41 and the end cover 42 are in contact with each other, the sealing ring 50 is squeezed to achieve a sealing effect.

[0068] Of course, an avoidance groove may also be provided on the end surface of the first opening of the seat body 41 , which is not specifically limited here.

[0069] In order to reduce the temperature of the mounting seat 40, the seat body 41 can be designed as a hollow structure, and two inlet and outlet holes connected to the first opening of the seat body 41 are opened on the end cover 42, one of which is an inlet and the other is an outlet. A cooling substance, such as a coolant, forms a cooling channel 3 in the cavity of the seat body 41 through the inlet, thereby achieving the purpose of cooling the mounting seat 40, that is, achieving the purpose of cooling the end of the absorption well 20, thereby improving the reliability of the mounting seat 40.

[0070] In addition to including the base body 41 and the end cover 42 , the mounting base 40 may also be a plate-shaped structure. That is, in other embodiments, the mounting base 40 may only include the end cover 42 .

[0071] When the mounting seat 40 only includes the end cover 42 , in order to reduce the temperature of the mounting seat 40 , a cooling channel 3 may be opened in the end cover 42 , thereby achieving the purpose of cooling the end of the absorption well 20 .

[0072] like Figure 2 and Figure 5 As shown, in some embodiments, the absorption trap 20 includes a trap body 21 and a sleeve 22, the sleeve 22 is sleeved on the trap body 21, and the inner cavity of the trap body 21 is an absorption cavity 203; a groove 23 is provided on the outer wall of the trap body 21, and the length extension direction of the groove 23 is a three-dimensional spiral; the groove wall of the groove 23 and the inner wall of the sleeve 22 form a first channel 1; two through holes 220 are provided on the wall of the sleeve 22, and the two through holes 220 are connected to the two ends of the first channel 1.

[0073] By spirally opening a groove 23 on the outer wall of the trap body 21, the groove wall of the groove 23 and the inner wall of the sleeve 22 form a first channel 1, so that in the first cross-section, two adjacent sections of the first channel 1 are separated by the groove wall of the groove 23. Therefore, when the coolant is transported into the first channel 1 through the through hole 220, the risk of the coolant generating vortexes in the first channel 1 is reduced, thereby effectively cooling the trap body 21.

[0074] Typically, the well body 21 of the absorption well 20 and the base of the reflector 40 are both made of T2 copper, and then different coatings are provided on the surface. For example, the surface of the well body 21 is provided with a titanium aluminum nitride coating for absorbing laser light.

[0075] like Figure 2 and Figure 5 As shown, there are two through holes 220 on the wall of the sleeve 22, and the two through holes 220 are located on the same side. Figure 5 In this way, when connecting a connector to an external device at the through hole 220, only space needs to be reserved on one side of the through hole 220, which helps to reduce the space occupied by the absorption well 20 on one side in the radial direction, thereby helping to reduce the overall space occupied by the absorption well 20.

[0076] like Figure 2 and Figure 3 As shown, the baffle 10 is provided with a mounting hole 11 that passes through the baffle 10 along the axial direction of the absorption well 20 , and the mounting hole 11 is connected to the first end 201 ; a concave lens 12 is detachably connected to the mounting hole 11 .

[0077] The concave lens is detachably connected to the mounting hole, making it easy to replace and repair the concave lens. Figure 5As shown, in some embodiments, from the first end 201 to the second end 202, the mounting hole 11 includes a first hole segment 111, a second hole segment 112 and a third hole segment 113 in sequence, and the diameter of the second hole segment 112 is larger than the diameter of the third hole segment 113; a lens retaining ring 13 is screwed at the first hole segment 111, and the lens retaining ring 13 is used to prevent the concave lens 12 from moving toward the direction close to the first end 201.

[0078] The lens retaining ring 13 is also called an external thread pressing ring, or simply a thread pressing ring.

[0079] By threading the lens retaining ring 13 into the first hole section 111, the rotation of the lens retaining ring 13 relative to the mounting hole 11 is converted into axial movement of the lens retaining ring 13 within the mounting hole 11, allowing the distance between the lens retaining ring 13 and the concave lens 12 to be adjusted. This not only facilitates the assembly and disassembly of the lens retaining ring 13, thereby facilitating the assembly and disassembly of the concave lens 12, but also reduces the contact surface between the lens retaining ring 13 and the concave lens 12, thereby reducing the impact on the concave lens 12 and facilitating the control of the installation accuracy of the concave lens 12. Furthermore, the mounting hole 11 is suitable for the installation and fixation of concave lenses 12 of different thicknesses within a certain range. When the concave lens 12 is assembled with the mounting hole 11, one side of the concave lens 12 stops at the third gap, while the other side of the concave lens 12 abuts the lens retaining ring 13. This ensures that the concave lens 12 is securely mounted while being easy to replace.

[0080] like Figure 2 As shown, in some embodiments, a lens cooling channel 2 is provided in the baffle 10 , and the lens cooling channel 2 extends along the circumference of the mounting hole 11 , and both ends of the lens cooling channel 2 pass through the side wall of the baffle 10 to communicate with the outside.

[0081] The lens cooling channel 2 can cool the concave lens 12 by supplying a cooling substance, such as a cooling liquid, to the lens cooling channel 2 .

[0082] By providing a lens cooling channel 2 along the circumference of the mounting hole 11 on the baffle 10 , cooling material can be supplied to the lens cooling channel 2 , thereby achieving the purpose of cooling the concave lens 12 , thereby extending the service life of the concave lens 12 .

[0083] It should be noted that both ends of the lens cooling channel 2 usually extend to the same side wall of the baffle 10.

[0084] When the connectors for connecting to external devices are connected at the inlets and outlets at both ends of the lens cooling channel 2, installation space can be reserved only at the inlets and outlets at both ends of the lens cooling channel 2 of the baffle 10, which is beneficial to reducing the space occupied by the laser absorption device. Figure 5As shown, in the first cross section, the inlets and outlets at both ends of the lens cooling channel 2 are located on the same side as the through hole 220 opened on the wall of the sleeve 22, that is, Figure 5 This helps to further reduce the space occupied by the laser absorption device.

[0085] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A laser absorption device, characterized in that: include: An absorption well (20) has a first end (201) and a second end (202), wherein the first end (201) allows a first light ray to enter an absorption cavity (203) of the absorption well (20); and an inner wall of the absorption well (20) is used to absorb the first light ray; a baffle (10) disposed on the first end (201), the baffle (10) being provided with a mounting hole (11) for placing a concave lens (12), the mounting hole (11) penetrating the baffle (10) along the axial direction of the absorption well (20) and being in communication with the first end (201); A mounting seat (40) is provided at the second end (202); A plurality of barrier absorbers (30) are arranged in the absorption well (20) at intervals along the axial direction of the absorption well (20), and the barrier absorbers (30) are used to reflect a portion of the first light irradiated on the surface of the barrier absorber (30) and absorb another portion of the first light; a light-through hole (301) for the first light to pass through is provided on some or all of the barrier absorbers (30), and the areas of the light-through holes (301) on the plurality of barrier absorbers (30) decrease in sequence from the first end (201) to the second end (202). The light-through hole (301) of the blocking and absorbing member (30) at the first position is the largest light-through hole (301), and the light-through hole (301) of the blocking and absorbing member (30) at the last position is the smallest light-through hole (301), and the orthographic projection of the largest light-through hole (301) on the baffle (10) covers the mounting hole (11); in a first cross section parallel to the axial direction of the absorption well (20), the angle formed by the line connecting the largest light-through hole and the smallest light-through hole and the axial direction of the absorption well (20) is negatively correlated with the divergence angle of the concave lens (12).

2. The laser absorption device according to claim 1, characterized in that The barrier absorber (30) is a truncated cone structure with a hollow cavity, the hollow cavity is a truncated cone structure, the small end (302) of the barrier absorber (30) is provided with the light-through hole (301), and the large end (303) of the barrier absorber (30) is connected to the inner wall of the absorption well (20).

3. The laser absorption device according to claim 2, characterized in that The barrier absorption member (30) comprises a reflecting surface (31) close to the first end (201) and an absorbing surface (32) close to the second end (202); the reflecting surface (31) is used to reflect the first light irradiated on the reflecting surface (31) onto the inner wall of the absorption well (20); and the absorbing surface (32) is used to absorb light.

4. The laser absorption device according to claim 3, characterized in that The reflecting surface (31) is a diffuse reflecting surface; and / or the absorbing surface (32) is a frosted surface.

5. The laser absorption device according to claim 2, characterized in that The thickness of the barrier absorbent (30) is 5 mm to 8 mm.

6. The laser absorption device according to any one of claims 1 to 5, characterized in that In the first cross section, an angle formed between a line connecting the maximum light-through hole (301) and the minimum light-through hole and the axial direction of the absorption well (20) is 20° to 70°.

7. The laser absorption device according to any one of claims 2 to 5, characterized in that The mounting seat (40) comprises a seat body (41) and an end cover (42); the seat body (41) is a hollow structure with one end open and the other end closed; the end cover (42) is arranged on the open end (412) of the seat body (41); the closed end (411) of the seat body (41) extends into the absorption cavity (203); the closed end (411) of the seat body (41) is connected to a connecting ear (43); the connecting ear (43) is stopped at the second end (202) of the absorption well (20).

8. The laser absorption device according to claim 7, characterized in that The closed end (411) of the seat body (41) protrudes toward the first end (201) near the center of the absorption well (20).

9. The laser absorption device according to any one of claims 1 to 5, characterized in that The mounting seat (40) is a plate-shaped structure.

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

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