Laser absorption device and laser equipment

Abstract

The utility model discloses a laser absorption device and laser equipment, relates to the technical field of laser equipment, and aims to solve the problems that a laser absorption device in the prior art is low in heat absorption and heat dissipation efficiency for high-power laser and easy to damage. The laser absorption device comprises an absorption well and a reflection base, the absorption well is provided with a first end and a second end, and the first end allows first light to enter an absorption cavity of the absorption well; the inner wall of the absorption trap is used for absorbing the first light; the reflection seat is arranged at the second end of the absorption well so as to cover the second end; the reflecting base comprises a plurality of reflecting surfaces and connecting surfaces which are located in the absorbing cavity, the connecting surfaces are connected between every two adjacent reflecting surfaces in the axial direction of the absorbing well, the reflecting surfaces are used for reflecting light irradiated on the reflecting surfaces to the inner wall of the absorbing well, each reflecting surface is provided with a small-opening end and a large-opening end, and the large-opening end is close to the second end.

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 trap and a reflection seat, the absorption trap having a first end and a second end, the first end allowing first light to enter the absorption cavity of the absorption trap; the inner wall of the absorption trap being used to absorb the first light; the reflection seat being arranged at the second end of the absorption trap to seal the second end; the reflection seat comprising a plurality of reflection surfaces and connecting surfaces located in the absorption cavity, the connecting surface being connected between two adjacent reflection surfaces along the axial direction of the absorption trap, the reflection surface being used to reflect the light irradiated on the reflection surface to the inner wall of the absorption trap, the reflection surface having a small mouth end and a large mouth end, the large mouth end being close to the second end.

[0006] In some embodiments, the reflecting surface has a conical structure or a truncated cone structure; within a first section, the angles between the side walls of multiple reflecting surfaces and the axial direction of the absorption well are equal, wherein the first section is parallel to the axial direction of the absorption well.

[0007] In some embodiments, in a first cross section, an angle formed between a side wall of the reflective surface and an axial direction of the absorption well is 20° to 70°, wherein the first cross section is parallel to the axial direction of the absorption well.

[0008] In some embodiments, the outer contour of the connecting surface is a cylindrical structure, and the axial direction of the connecting surface is parallel to the axial direction of the absorption well.

[0009] In some embodiments, there are multiple connecting surfaces, and the number of the connecting surfaces is the same as the number of the reflecting surfaces.

[0010] In some embodiments, the reflective seat is a hollow structure.

[0011] In some embodiments, the reflective seat has a first opening at one end close to the second end, the first opening is covered with an end panel, and the end panel is provided with two inlet and outlet holes communicating with the inside and outside of the reflective seat.

[0012] In some embodiments, the absorption trap includes a trap body and a sleeve, the sleeve is sleeved on the trap body, and the inner cavity of the trap body is the absorption cavity; a groove is provided on the outer wall of the trap body, and the length extension direction of the groove is three-dimensional spiral; the groove wall and the inner wall of the sleeve form a first channel; two through holes are provided on the cylindrical wall of the sleeve, and the two through holes are connected to the two ends of the first channel.

[0013] In some embodiments, a baffle is provided at the first end of the absorption well, and a mounting hole is provided on the baffle that passes through the baffle along the axial direction of the absorption well, and the mounting hole is connected to the first end; a concave lens is detachably connected to the mounting hole.

[0014] In some embodiments, from the first end to the second end, the mounting hole includes a first hole segment, a second hole segment and a third hole segment in sequence, and the diameter of the second hole segment is larger than the diameter of the third hole segment; a lens retaining ring is screwed at the first hole segment, and the lens retaining ring is used to prevent the concave lens from moving toward the first end.

[0015] In some embodiments, a lens cooling channel is provided in the baffle, and the lens cooling channel extends along the circumference of the mounting hole. Both ends of the lens cooling channel pass through the side wall of the baffle and communicate with the outside.

[0016] The laser absorption device provided by the embodiment of the present application is provided with a reflective seat at the end of the absorption well. The reflective seat includes multiple reflective surfaces and connecting surfaces. Along the axial direction of the absorption well, the connecting surface is connected between two adjacent reflective surfaces, and the large end of the reflective surface is close to the second end, so that the multiple reflective surfaces and connecting surfaces of the reflective seat located in the cavity are roughly conical in structure and are arranged in steps in the axial direction of the absorption well. In this way, compared with the case where multiple reflective surfaces are directly connected and have the same reflective seat structure as in the related art, the multiple reflective surfaces are arranged at intervals in the axial direction of the absorption well, so that the first light reflected by the reflective surface can be evenly irradiated on the inner wall of the absorption well and absorbed. That is to say, after the first light is reflected by the reflective surface, the first light is evenly irradiated on the inner wall of the absorption well and absorbed. A portion of the first light that enters the cavity at one end directly shines on the inner wall of the absorption well and is absorbed; the other portion of the first light is distributed and shines on multiple reflecting surfaces, and after being reflected by the reflecting surfaces, shines on the inner wall of the absorption well and is absorbed. In this way, the first light that is finally shone on the inner wall of the absorption well is relatively uniform. When the power of the laser increases significantly, not only does the temperature of the absorption well increase uniformly, reducing the risk of rapid local temperature increase in the absorption well, thereby improving the energy absorption and heat dissipation efficiency, but the first light is also uniformly shone on the inner wall of the absorption well and is absorbed, reducing the risk of damage to the absorption well when the laser power is large, thereby improving the service life of the laser absorption device.

[0017] 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.

[0018] 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

[0019] 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.

[0020] Figure 1 Schematic diagram of the structure of the laser absorption device in some embodiments of the present application;

[0021] Figure 2 for Figure 1 A partial cross-sectional view of the laser absorption device;

[0022] Figure 3 for Figure 1 An exploded view of the laser absorption device at one viewing angle;

[0023] Figure 4for Figure 1 A cross-sectional view of the laser absorption device in the first section;

[0024] Figure 5 for Figure 4 AA cross-section diagram in.

[0025] Description of reference numerals:

[0026] 1. First channel; 2. Lens cooling channel; 3. Reflection cone cooling channel;

[0027] 10. Baffle; 11. Mounting hole; 111. First hole section; 112. Second hole section; 113. Third hole section; 12. Concave lens; 13. Lens retaining ring;

[0028] 20, absorption well; 201, first end; 202, second end; 203, cavity; 21, well body; 22, sleeve; 220, through hole; 23, groove;

[0029] 30. Reflector seat; 301. First opening; 31. Reflecting surface; 311. Small opening end; 312. Large opening end; 32. Connecting surface; 33. Stop surface;

[0030] 40. End panel; 41. Inlet and outlet holes;

[0031] 50. Sealing ring. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] like Figure 1 、 Figure 2 and Figure 3As shown, the laser absorption device includes an absorption well 20 and a reflection seat 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 reflection seat 30 is arranged at the second end 202 of the absorption well 20 to cover the second end 202; the reflection seat 30 includes a plurality of reflection surfaces 31 and a connecting surface 32 located in the absorption cavity 203. Along the axial direction of the absorption well 20, the connecting surface 32 is connected between two adjacent reflection surfaces 31. The reflection surface 31 is used to reflect the light irradiated on the reflection surface 31 to the inner wall of the absorption well 20. The reflection surface 31 has a small mouth end 311 and a large mouth end 312, and the large mouth end 312 is close to the second end 202.

[0041] The above-mentioned small-mouth end 311 is the end of the reflecting surface 31 close to the first end, and the above-mentioned large-mouth end 312 is the end of the reflecting surface 31 close to the second end 202, that is, the large-mouth end 312 is inclined relative to the small-mouth end 311 in the direction away from the axial direction of the absorption well 20, so that the multiple reflecting surfaces 31 and connecting surfaces 32 of the reflecting seat 30 located in the cavity 203 are roughly conical or flared.

[0042] 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.

[0043] The reflective seat 30 not only reflects the first light, but also covers the second end 202 of the absorption well 20 .

[0044] By setting a reflective seat 30 at the end of the absorption well 20, the reflective seat 30 includes a plurality of reflective surfaces 31 and a connecting surface 32. Along the axial direction of the absorption well 20, the connecting surface 32 is connected between two adjacent reflective surfaces 31, and the large end 312 of the reflective surface 31 is arranged close to the second end 202, so that the plurality of reflective surfaces 31 and the connecting surface 32 of the reflective seat 30 located in the cavity 203 are roughly conical or flared, and are arranged in a stepped manner in the axial direction of the absorption well 20. In this way, compared with the case where the plurality of reflective surfaces 31 are directly connected and have the same structure as the reflective seat 30 in the related art, the plurality of reflective surfaces 31 are arranged at intervals in the axial direction of the absorption well 20, so that the first light reflected by the reflective surface 31 can be evenly irradiated on the inner wall of the absorption well 20 and absorbed. That is to say, a portion of the first light entering the cavity 203 through the first end 201 directly shines on the inner wall of the absorption well 20 and is absorbed; another portion of the first light is distributed and shines on multiple reflecting surfaces 31, and after being reflected by the reflecting surfaces 31, shines on the inner wall of the absorption well 20 and is absorbed. In this way, the first light finally shining on the inner wall of the absorption well 20 is relatively uniform. When the power of the laser increases significantly, not only does the temperature of the absorption well 20 increase uniformly, reducing the risk of rapid local temperature increase in the absorption well 20, thereby improving the energy absorption and heat dissipation efficiency, but also the first light is uniformly irradiated on the inner wall of the absorption well 20 and is absorbed, 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] 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.

[0046] like Figure 2 and Figure 5 As shown, in some embodiments, the reflective surface 31 has a conical or truncated cone structure. Within a first cross-section, the angles between the sidewalls of the multiple reflective surfaces 31 within the first cross-section and the axial direction of the absorption well 20 are equal. In other words, within the first cross-section, the contours of the reflective surfaces 31 within the first cross-section are parallel. This further simplifies the manufacturing process of the reflective base 30.

[0047] like Figure 2 and Figure 5 As shown, the outer contour of the connecting surface 32 is a cylindrical structure, and the axial direction of the connecting surface 32 is parallel to the axial direction of the absorption well 20. This facilitates the processing of the reflector 30, simplifies the processing steps of the reflector 30, and thus reduces the processing cost of the reflector 30.

[0048] like Figure 5 As shown in the figure, from the first end 201 ( Figure 5 left side in) to the second end 202 ( Figure 5In the direction (right side in the figure), the outer contour of the reflective surface 31 at the first position is a conical structure, and the outer contours of the reflective surfaces 31 other than the reflective surface 31 at the first position are truncated cone structures. In other words, the outer contours of the reflective surfaces 31 are flared in the first cross section. In this way, the radial dimension of the inner cavity of the reflective base 30 gradually increases from the first end 201 to the second end 202.

[0049] It should be noted that the first cross section is parallel to the axial direction of the absorption trap 20 .

[0050] like Figure 2 and Figure 3 As shown, there are four reflecting surfaces 31 and four connecting surfaces 32 , and the reflecting surfaces 31 and the connecting surfaces 32 are alternately connected in the axial direction of the absorption well 20 .

[0051] It should be noted that the number of reflective surfaces 31 can be the same as the number of connecting surfaces 32. In addition to being four, the number of reflective surfaces 31 and the number of connecting surfaces 32 can also be other numbers. The number of reflective surfaces 31 can also be different from the number of connecting surfaces 32. For example, the number of connecting surfaces 32 can be one less than the number of reflective surfaces 31. Specifically, the number of reflective surfaces 31 and the number of connecting surfaces 32 can be determined in combination with the power of the laser and the size of the absorption well 20, and are not specifically limited here.

[0052] like Figure 5 As shown, in some embodiments, in the first cross section, the angle formed between the sidewall of the reflective surface 31 and the axial direction of the absorption well 20 is 20° to 70°.

[0053] When designing the angle formed between the contour line of the reflecting surface 31 in the first cross section and the axial direction of the absorption well 20, the angle can be adjusted based on the laser power, the number of reflecting surfaces 31 and connecting surfaces 32 in the reflecting seat 30, and the size of the absorption well 20 so that the first light is uniformly irradiated or reflected onto the inner wall of the absorption well 20 and absorbed.

[0054] By properly selecting the angle formed between the contour line of the reflecting surface 31 in the first cross section and the axial direction of the absorption well 20 , it is beneficial to improve the absorption efficiency of the laser beam in the absorption well 20 .

[0055] like Figure 2 and Figure 5 As shown, in some embodiments, the reflector base 30 is a hollow structure. This not only saves the cost of the reflector base 30, but also allows a cooling material to be filled or delivered into the cavity of the reflector base 30 to cool the reflector base 30, thereby reducing the risk of damage to the reflector base 30 due to excessive energy of the first laser beam received.

[0056] like Figure 2and Figure 5 As shown, in some embodiments, the reflector base 30 has a first opening 301 at one end near the second end 202. An end panel 40 is provided on the first opening 301. The end panel 40 has two inlet and outlet holes 41 that connect the inside and outside of the reflector base 30. Thus, one of the inlet and outlet holes serves as an inlet, and the other as an outlet. A cooling substance, such as a coolant, passes through the inlet into the cavity of the reflector base 30 to form a reflective cone cooling channel, thereby cooling the reflector base 30 and improving the reliability of the reflector base 30.

[0057] Through the above arrangement, the structure of the reflector seat 30 is simplified and easy to manufacture.

[0058] The end panel 40 and the reflector seat 30 can be detachably connected by screw connection, snap connection, etc., so as to facilitate the disassembly, assembly and replacement of the reflector seat 30 and the absorption well 20.

[0059] like Figure 3 As shown, the first connection surface 32 located near the second end 202 is connected to a stop surface 33 . The stop surface 33 is detachably connected to the absorption well 20 , so that the reflective seat 30 is stopped at the second end 202 .

[0060] In order to improve the sealing performance between the stop surface 33 and the end panel 40, Figure 3 As shown, an avoidance groove is provided on the end panel 40 , and a sealing ring 50 is provided in the avoidance groove. When the blocking surface 33 is in contact with the end panel 40 , the sealing ring 50 is squeezed, thereby achieving a sealing effect.

[0061] Of course, an avoidance groove may also be provided on the blocking surface 33 , which is not specifically limited here.

[0062] Of course, the reflector base 30 can be a hollow structure, a semi-hollow structure, or a solid structure. When the reflector base 30 is a solid structure, the end cover plate can be omitted. It is used in scenarios with low laser power.

[0063] like Figure 2 、 Figure 3 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.

[0064] 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 a coolant, such as water, 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.

[0065] Typically, the well body 21 of the absorption well 20 and the base of the reflector 30 are both made of T2 copper, and then coated with different coatings. For example, the well body 21 is coated with titanium aluminum nitride to absorb laser light, while the reflector 30 is silver-plated to facilitate laser reflection.

[0066] 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.

[0067] like Figure 2 and Figure 3 As shown, in some embodiments, a baffle 10 is provided at the first end 201 of the absorption well 20, and a mounting hole 11 is provided on 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.

[0068] By providing concave lens 12 on baffle 10, the laser beam is first diverged by concave lens 12 before entering cavity 203 of absorption well 20. This makes the first light beam irradiated on the inner wall of absorption well 20 more uniform. Furthermore, concave lens 12 is detachably connected to mounting hole 11, facilitating replacement and maintenance of concave lens 12.

[0069] like Figure 5 As 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.

[0070] The lens retaining ring 13 is also called an external thread pressing ring, or simply a thread pressing ring.

[0071] 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.

[0072] 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.

[0073] 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 .

[0074] 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 .

[0075] It should be noted that both ends of the lens cooling channel 2 usually extend to the same side wall of the baffle 10.

[0076] 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 5 As 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.

[0077] 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 reflective seat (30) is arranged at the second end (202) of the absorption well (20) to cover the second end (202); the reflective seat (30) comprises a plurality of reflective surfaces (31) and a connecting surface (32) located in the absorption cavity (203); along the axial direction of the absorption well (20), the connecting surface (32) is connected between two adjacent reflective surfaces (31); the reflective surface (31) is used to reflect light irradiated on the reflective surface (31) onto the inner wall of the absorption well (20); the reflective surface (31) has a small end (311) and a large end (312); the large end (312) is close to the second end (202).

2. The laser absorption device according to claim 1, characterized in that The reflecting surface (31) is a conical structure or a truncated cone structure; within a first cross section, the angles between the side walls of the plurality of reflecting surfaces (31) and the axial direction of the absorption well (20) are equal, wherein the first cross section is parallel to the axial direction of the absorption well (20).

3. The laser absorption device according to claim 1, wherein: In the first cross section, the angle formed between the side wall of the reflecting surface (31) and the axial direction of the absorption well (20) is 20° to 70°, wherein the first cross section is parallel to the axial direction of the absorption well (20).

4. The laser absorption device according to claim 1, wherein The outer contour of the connecting surface (32) is a cylindrical structure, and the axial direction of the connecting surface (32) is parallel to the axial direction of the absorption well (20).

5. The laser absorption device according to any one of claims 1 to 4, characterized in that The reflective seat (30) is a hollow structure.

6. The laser absorption device according to claim 5, characterized in that The reflective seat (30) has a first opening (301) at one end close to the second end (202), and an end panel (40) is provided on the first opening (301). The end panel (40) is provided with two inlet and outlet holes (41) communicating with the inside and outside of the reflective seat (30).

7. The laser absorption device according to any one of claims 1 to 4, characterized in that The absorption trap (20) comprises a trap body (21) and a sleeve (22), wherein the sleeve (22) is sleeved on the trap body (21), and the inner cavity of the trap body (21) is the 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 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.

8. The laser absorption device according to claim 7, characterized in that A baffle (10) is provided at the first end (201) of the absorption well (20), and a mounting hole (11) is provided on the baffle (10) and passes through the baffle (10) along the axial direction of the absorption well (20), and the mounting hole (11) is communicated with the first end (201); a concave lens (12) is detachably connected to the mounting hole (11).

9. The laser absorption device according to claim 8, characterized in that In a direction from the first end (201) to the second end (202), the mounting hole (11) comprises a first hole section (111), a second hole section (112) and a third hole section (113) in sequence, wherein the diameter of the second hole section (112) is larger than the diameter of the third hole section (113); a lens retaining ring (13) is screwed onto the first hole section (111), and the lens retaining ring (13) is used to prevent the concave lens (12) from moving in a direction close to the first end (201).

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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