Laser absorption device and laser equipment

Abstract

The invention 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 the operation of high-power laser equipment, a large amount of excess laser light that is not the final output is generated. A laser absorption device is needed to collect and absorb the light that is not needed during the operation of the laser equipment. For the excess laser light generated inside the laser equipment, the usual practice is to set a laser absorption device on the optical path of the excess laser light, and convert the excess laser light into heat through water cooling or other thermal contact methods, which is absorbed by the heat dissipation system of the laser equipment itself.

[0003] This laser absorption device in the related art sets a conical reflector at the end of the absorption well. After the laser enters the absorption well, part of the light directly hits the inner wall of the absorption well and is absorbed, and the other part of the light is reflected by the reflector to the inner wall of the absorption well and absorbed. Since the reflection surface at the tip of the reflector is small, the laser cannot be effectively diffused and reflected, so that the light energy received by some areas of the inner wall of the absorption well is relatively concentrated, which is not conducive to uniform energy dispersion, resulting in low heat absorption and heat dissipation efficiency. When the probability of laser is high, the energy density of the absorption well is too high, resulting in damage to the absorption layer. Summary of the invention

[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 easy to be damaged for a relatively high-power laser.

[0005] In a first aspect, an embodiment of the present application provides a laser absorption device, including 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 being for a first light ray to enter an absorption cavity of the absorption well; the inner wall of the absorption well being used to absorb the first light ray; the baffle cover being arranged at the first end, the baffle being provided with a mounting hole for placing a concave lens, the mounting hole passing through the baffle along the axial direction of the absorption well and being connected to the first end; the mounting seat cover being arranged at the second end; a plurality of baffle absorption members being arranged at intervals in the absorption well along the axial direction of the absorption well, the baffle absorption members being 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 portion or all of the blocking and absorbing members are provided with light-through holes for the first light to pass through, 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 and absorbent member is a truncated cone structure with a hollow cavity, the hollow cavity is a truncated cone structure, the light-through hole is opened at the small end of the baffle and absorbent member, and the large end of the baffle and absorbent member is connected to the inner wall of the absorption well.

[0007] In some embodiments, the blocking absorber includes a reflective surface close to the first end and an absorbing surface close to the second end, the reflective surface is used to reflect the first light irradiated on the reflective 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 thickness of the barrier absorbent is 5 mm to 8 mm.

[0011] In some embodiments, in the first cross section, an angle formed by 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 covered on the open end of the seat body.

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

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

[0015] The laser absorption device provided in the embodiment of the present application arranges a plurality of baffle absorbers in the absorption well cavity along the axial direction at intervals. From the first end to the second end, the areas of the plurality of light-through holes decrease successively, and the orthographic projection of the largest light-through hole on the baffle plate arranged at the first end covers the mounting hole on the baffle plate. Then, after the first light is diverged by the concave lens and enters the cavity, it is more dispersedly irradiated on the surfaces of different baffle absorbers, that is, the first light is reflected after secondary divergence. In this way, a part of the reflected light after being reflected by the baffle absorber is irradiated on the adjacent baffle absorber again and absorbed, and another part of the reflected light is irradiated on the inner wall of the absorption well and absorbed, thereby increasing the area of ​​the first light irradiated on the surface of the baffle absorber, so that the reflected light after being reflected by the baffle absorber is uniformly irradiated on the inner wall of the absorption well or on the surface of the adjacent baffle absorber and absorbed. In this way, the first light first passes through the concave lens to achieve the first divergence and then enters the cavity, and then irradiates on different baffle absorbers, so that the first light is uniformly irradiated or reflected on the baffle absorber and the absorption well after two divergences and is 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0019] Figure 1 It is a schematic structural diagram of a 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 A 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, baffle and absorber; 301, light-through 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 cover; 43, connecting ear;

[0030] 50. Sealing ring. DETAILED DESCRIPTION

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

[0032] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present 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 should not be understood as a limitation on the present application.

[0033] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0035] During the operation of high-power laser equipment, a large amount of excess laser light that is not the final output is generated. A laser absorption device is needed to collect and absorb the light that is not needed during the operation of the laser equipment. For the excess laser light generated inside the laser equipment, the usual practice is to set a laser absorption device on the optical path of the excess laser light, and convert the excess laser light into heat through water cooling or other thermal contact methods, which is absorbed by the heat dissipation system of the laser equipment itself.

[0036] This laser absorption device in the related art sets a conical reflector at the end of the absorption well. After the laser enters the absorption well, part of the light directly hits the inner wall of the absorption well and is absorbed, and the other part of the light is reflected by the reflector to the inner wall of the absorption well and absorbed. Since the reflection surface at the tip of the reflector is small, the laser cannot be effectively diffused and reflected, so that the light energy received by some areas of the inner wall of the absorption well is relatively concentrated, which is not conducive to uniform energy dispersion, resulting in low heat absorption and heat dissipation efficiency. When the probability of laser is high, the energy density of the absorption well is too high, resulting in damage to the absorption layer.

[0037] In order to solve the problem that the laser absorption device in the related art has low heat absorption and heat dissipation efficiency and is easy to be damaged for high-power lasers. The embodiment of the present application provides a laser absorption device and a laser device. The laser device includes a laser absorption device. Usually, the laser absorption device is set in the optical path generated by the excess laser, and the excess laser is converted into heat by water cooling or other thermal contact methods, which is absorbed by the heat dissipation system of the laser device itself.

[0038] It should be noted that the above-mentioned laser device can be a laser or a laser detection device, 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 absorption members 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. The baffle 10 is provided with a mounting hole 11 for placing a concave lens 12. 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. The plurality of baffle absorption members 30 are arranged in the absorption well 20 along the axial direction of the absorption well 20. The baffle absorption members 30 are used to absorb the light irradiated on the absorption well 20. 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 portion or all of the blocking and absorbing member 30 is provided with a light-through hole 301 for the first light to pass through, and the area of ​​the light-through hole 301 decreases successively from the first end 201 to the second end 202. The light-through hole 301 of the blocking and absorbing member 30 located at the first position is the largest light-through hole 301, and the light-through hole 301 of the blocking and absorbing member 30 located at the last position is the smallest light-through hole 301. The orthographic projection of the largest light-through hole 301 on the baffle 10 covers the mounting hole 11; the angle between the line between the largest light-through hole 301 and the smallest 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.

[0040] The absorption well 20 is cylindrical, and the 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 disposed 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 between 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 between 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 between 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 light-through holes 301 are provided on some or all of the above-mentioned blocking and absorbing members 30, including that all of the blocking and absorbing members 30 are provided with light-through holes 301, and also include that except for the first blocking and absorbing member 30 located near the second end 202, all other blocking and absorbing members 30 are provided with light-through holes 301.

[0044] By arranging a plurality of blocking absorbers 30 in the cavity 203 of the absorption trap 20 at intervals 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 arranged at the first end 201 covers the mounting hole 11 on the baffle 10. Then, after the first light diverged by the concave lens 12 enters the cavity 203, it is more dispersed and irradiated on the surfaces of different blocking absorbers 30, that is, the first light is reflected after secondary divergence, so that a part of the reflected light after being reflected by the blocking absorber 30 is irradiated again. The first light is absorbed by the adjacent barrier absorber 30, and the other part of the reflected light is absorbed after being irradiated to the inner wall of the absorption well 20, thereby increasing the area on which the first light irradiates the surface of the barrier absorber 30, so that the reflected light after being reflected by the barrier absorber 30 is evenly irradiated to the inner wall of the absorption well 20 or 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 absorber 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 increasing 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 blocking and absorbing member 30 is also designed as a 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 aperture 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 as other shapes, which are not specifically limited here. The following description takes the light-through hole 301 as a circular hole 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 formed 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, from the first end 201 to the second end 202, that is, Figure 4From left to right in the figure, the light-through hole 301 on the first position of the partition and absorption member 30 is the largest light-through hole 301 , and the light-through hole 301 on the eighth position of the partition and absorption member 30 is the smallest light-through hole 301 .

[0048] In the process of designing 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 8, 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. The thickness of the barrier absorber 30 is an important factor in the design of the barrier absorber 30. By properly selecting the thickness of the barrier absorber 30, when the thickness of the barrier absorber 30 satisfies the above relationship, the light irradiated on the inner wall of the absorption well 20 by the first light after passing through the barrier absorber 30 is more uniform.

[0050] like Figure 4 and Figure 5 As shown, in some embodiments, the blocking 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 blocking absorber 30 is provided with a light-through hole 301, and the large end 303 of the blocking absorber 30 is connected to the inner wall of the absorption well 20.

[0051] By making the barrier absorbent 30 a truncated cone structure with a hollow cavity, the hollow cavity is a truncated cone structure, so that the side wall of the barrier absorbent 30 is inclined 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 blocking absorber 30 includes a reflective surface 31 close to the first end 201 and an absorbent 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 absorbent surface 32 is used to absorb the light.

[0053] Through the above design, the path of the first light is made more diversified, which is further conducive to making the first light irradiated more uniformly on the inner wall of the absorption trap 20 and the surface of the partition absorption member 30.

[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 formed by sandblasting on the base of the barrier absorber 30. Usually, the base of the barrier absorber 30 is T2 copper, and then the reflective surface 31 maintains the T2 copper of the base of the barrier absorber 30 to reflect the first light; and then the absorbing surface 32 of the base is coated with titanium aluminum nitride to achieve the function of absorbing the first light.

[0058] like Figure 4 and Figure 5 As shown, the structures of the eight barrier absorbent members 30 are all truncated cone structures with hollow cavities, the hollow cavities are truncated cone structures, 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 portion of the barrier absorbent members 30 are close to the first end 201, and the large ends 303 of another portion of the barrier absorbent members 30 are close to the first end 201.

[0059] Of course, the structure of the eight barrier absorbers 30 may also be that a part of the barrier 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 barrier absorber 30 is a flat plate structure, which is not specifically limited here.

[0060] In the optical design process of the laser absorption device, the angle formed by the line between the maximum light hole 301 and the minimum light hole 301 and the axial direction of the absorption well 20 is an important parameter. When the angle formed by the line between the maximum light hole 301 and the minimum light hole 301 and the axial direction of the absorption well 20 meets 20° to 70°, the absorption efficiency of the absorption well 20 and the temperature requirements of the laser absorption device can be met.

[0061] like Figure 2 and Figure 5 As shown, in some embodiments, the mounting seat 40 includes 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 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 stops at the second opening of the absorption trap 20. The end cover 42 is covered on the open end 412 of the seat body 41.

[0062] The closed end 411 of the seat body 41 extends into the cavity 203 of the absorption trap 20, so that the connection between the seat body 41 and the absorption trap 20 is more firmly established; the connection ear 43 is provided to facilitate connection with the end surface of the second end 202 of the absorption trap 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 mouth 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 seat body 41 and the absorption trap 20 is further improved.

[0066] It should be noted that, in addition to protruding in the direction close to 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 in the direction close to 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 arranged 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 the inlet and outlet holes 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 cooling of the mounting seat 40, that is, achieving the purpose of cooling the end of the absorption trap 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 trap 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 vortex in the first channel 1 is reduced, so that the trap body 21 can be well cooled.

[0074] Usually, the well body 21 of the absorption well 20 and the substrate of the reflection seat 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, two through holes 220 are formed 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 a connector connected to an external device is connected at the through hole 220, only space needs to be reserved on one side where the through hole 220 is opened, which is beneficial to reducing the space occupied by the absorption well 20 on one side in the radial direction, thereby helping to reduce the space occupied by the absorption well 20 as a whole.

[0076] like Figure 2 and Figure 3 As shown, the baffle plate 10 is provided with a mounting hole 11 penetrating the baffle plate 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, which facilitates the replacement and maintenance of 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 a thread pressing ring for short.

[0079] By screwing the lens retaining ring 13 at the first hole section 111, the rotation of the lens retaining ring 13 relative to the mounting hole 11 is converted into the axial movement of the lens retaining ring 13 in the mounting hole 11, so that the distance between the lens retaining ring 13 and the concave lens 12 can be adjusted, which not only facilitates the disassembly and assembly of the lens retaining ring 13, thereby facilitating the disassembly and assembly of the concave lens 12, but also the contact surface between the lens retaining ring 13 and the concave lens 12 is small, thereby reducing the impact on the concave lens 12, which is conducive to controlling the installation accuracy of the concave lens 12, and at the same time, the mounting hole 11 can be 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 is stopped at the third empty section, and the other side of the concave lens 12 is in contact with the lens retaining ring 13, so that the concave lens 12 is firmly installed on the basis of convenient replacement.

[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 penetrate the side wall of the baffle 10 to communicate with the outside.

[0081] The lens cooling channel 2 plays a role in cooling the concave lens 12 by conveying a cooling substance, such as a cooling liquid, to the lens cooling channel 2 .

[0082] By arranging the lens cooling channel 2 along the circumference of the mounting hole 11 on the baffle 10 , the concave lens 12 can be cooled by conveying cooling material to the lens cooling channel 2 , 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 occupied space of the laser absorption device. Figure 5As shown, in the first cross section, the inlet and outlet of 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 occupied space of the laser absorption device.

[0085] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A laser absorption device, characterized in that: include: An absorption well (20) having 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) which is covered at the first end (201); a mounting hole (11) for placing a concave lens (12) is provided on the baffle (10); the mounting hole (11) penetrates the baffle (10) along the axial direction of the absorption well (20) and is in communication with the first end (201); A mounting seat (40) is disposed on the second end (202); A plurality of baffle absorbers (30) are arranged in the absorption well (20) at intervals along the axial direction of the absorption well (20), and the baffle absorbers (30) are used to reflect a portion of the first light irradiated on the surface of the baffle absorbers (30) and absorb another portion of the first light; a light-through hole (301) for the first light to pass through is opened on some or all of the baffle absorbers (30), and the areas of the light-through holes (301) on the plurality of baffle absorbers (30) decrease in sequence from the first end (201) to the second end (202), and the light-through holes (301) located at the first end (201) and the second end (202) are gradually reduced. The light-through hole (301) of the blocking and absorbing member (30) at one 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 blocking and absorbing 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 reflective surface (31) is a diffuse reflective 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, the angle formed between the 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) stops at the second end (202) of the absorption trap (20).

8. The laser absorption device according to claim 7, characterized in that: The closed end (411) of the seat body (41) protrudes in a direction close to 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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