Water-cooled beam expander with adjustable divergence angle

Abstract

The present application relates to the field of laser processing technology, and in particular to a water-cooled beam expander with adjustable divergence angle, the water-cooled beam expander with adjustable divergence angle comprising a first water-cooled lens barrel and a second water-cooled lens barrel, the first water-cooled lens barrel comprising a first lens barrel housing, a first lens being arranged in the first lens barrel housing, the second water-cooled lens barrel comprising a second lens barrel housing, a second lens being arranged in the second lens barrel housing, a first thread being arranged at one end of the first lens barrel housing close to the second lens barrel housing, a second thread being arranged at one end of the second lens barrel housing close to the first lens barrel housing, the first lens barrel housing and the second lens barrel housing being threadedly assembled through the first thread and the second thread. The distance between the first lens and the second lens is changed by thread adjustment, so as to achieve adjustment of the divergence angle of the light beam, thus solving the problem that the divergence angle of the conventional water-cooled beam expander is generally unable to be adjusted, and the adjustment structure of a very small portion of the water-cooled beam expanders that can adjust the divergence angle is relatively complex, resulting in high cost.

Description

Technical Field

[0001] The present application relates to the field of laser processing technology, and in particular to a water-cooled beam expander with adjustable divergence angle. Background Art

[0002] Beam expanders are generally used in laser processing systems to expand the area of ​​the incident laser spot, reduce the probability of laser damage to subsequent optical devices, and at the same time reduce the laser divergence angle to improve the subsequent laser processing effect. Water-cooled beam expanders are one of them. Water-cooled beam expanders are suitable for high-power laser applications. Through circulating water cooling, they can reduce the thermal focus effect of the lens and reduce the drift of the spot.

[0003] In the actual production process, there may be a situation where the incident light is not completely collimated and has a divergence angle. At this time, a collimator with an adjustable divergence angle will be used. However, traditional water-cooled collimators generally cannot adjust the divergence angle, and the adjustment structure of a very small number of water-cooled collimators that can adjust the divergence angle is relatively complex, resulting in high costs. Summary of the invention

[0004] The present application provides a water-cooled beam expander with adjustable divergence angle, aiming to solve the problem that conventional water-cooled beam expanders generally cannot adjust the divergence angle, and the adjustment structure of a very small number of water-cooled beam expanders that can adjust the divergence angle is relatively complex, resulting in high costs.

[0005] In order to solve the above technical problems, the present application proposes a water-cooled beam expander with adjustable divergence angle, the water-cooled beam expander with adjustable divergence angle comprising: a first water-cooled lens barrel and a second water-cooled lens barrel;

[0006] The first water-cooled lens barrel includes a first lens barrel shell, in which a first lens is disposed, the second water-cooled lens barrel includes a second lens barrel shell, in which a second lens is disposed, a first thread is disposed at one end of the first lens barrel shell close to the second lens barrel shell, a second thread is disposed at one end of the second lens barrel shell close to the first lens barrel shell, the first thread matches the second thread, and the first lens barrel shell and the second lens barrel shell are threadedly assembled via the first thread and the second thread.

[0007] Furthermore, the water-cooled collimator with adjustable divergence angle also includes a positioning ring, the positioning ring is provided with a third thread, the third thread matches the second thread, the positioning ring is threadedly assembled with the second lens barrel shell, and the positioning ring is used to fix the relative positions of the first lens barrel shell and the second lens barrel shell.

[0008] Furthermore, a first annular wall and a second annular wall are provided at one end of the first lens barrel housing away from the second lens barrel housing, the first annular wall and the second annular wall are concentrically arranged, and the diameter of the first annular wall is greater than the diameter of the second annular wall, and a first annular groove is formed between the first annular wall and the second annular wall, and the first annular groove is used for passing cooling water.

[0009] Furthermore, a third annular wall and a fourth annular wall are provided at one end of the second lens barrel housing away from the first lens barrel housing, the third annular wall and the fourth annular wall are concentrically arranged, and the diameter of the third annular wall is greater than the diameter of the fourth annular wall, and a second annular groove is formed between the third annular wall and the fourth annular wall, and the second annular groove is used for passing cooling water.

[0010] Furthermore, the first water-cooled lens barrel also includes a first sealing ring, a second sealing ring and a first waterproof pressure ring, the first waterproof pressure ring is fixedly assembled with the first lens barrel housing, and the first waterproof pressure ring presses the first sealing ring and the second sealing ring against the end faces of the first annular wall and the second annular wall respectively to seal the first annular groove.

[0011] Furthermore, the second water-cooled lens barrel also includes a third sealing ring, a fourth sealing ring and a second waterproof pressure ring, the second waterproof pressure ring is fixedly assembled with the second lens barrel outer shell, and the second waterproof pressure ring presses the third sealing ring and the fourth sealing ring against the end faces of the third annular wall and the fourth annular wall respectively to seal the second annular groove.

[0012] Furthermore, the first water-cooled lens barrel also includes a first lens pressing ring, which is fixedly assembled at the inner ring of the first waterproof pressing ring, and the first lens pressing ring presses the first lens toward the end surface of the second annular wall to fix the first lens.

[0013] Furthermore, the second water-cooled lens barrel also includes a second lens pressing ring, which is fixedly assembled on the inner ring of the second waterproof pressing ring, and the second lens pressing ring presses the second lens toward the end surface of the fourth annular wall to fix the second lens.

[0014] Furthermore, the first water-cooling lens barrel also includes a first water pipe joint, and the first water pipe joint is connected to the first annular groove.

[0015] Furthermore, the second water-cooling lens barrel also includes a second water pipe joint, and the second water pipe joint is connected to the second annular groove.

[0016] The beneficial effects of the present application are as follows: in the water-cooled beam expander with adjustable divergence angle provided in the present application, the water-cooled beam expander with adjustable divergence angle includes a first water-cooled lens barrel and a second water-cooled lens barrel, the first water-cooled lens barrel includes a first lens barrel housing, a first lens is arranged in the first lens barrel housing, the second water-cooled lens barrel includes a second lens barrel housing, a second lens is arranged in the second lens barrel housing, a first thread is arranged at one end of the first lens barrel housing close to the second lens barrel housing, a second thread is arranged at one end of the second lens barrel housing close to the first lens barrel housing, the first thread and the second thread match, and the first lens barrel housing and the second lens barrel housing are threadedly assembled by the first thread and the second thread. When the divergence angle of light needs to be adjusted, the relative position relationship between the first water-cooled lens barrel and the second water-cooled lens barrel can be adjusted by the first thread and the second thread, and then the distance between the first lens and the second lens is adjusted, so as to achieve the purpose of adjusting the divergence angle by a simple structure with low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work. Among them:

[0018] Figure 1 is a schematic structural diagram of a water-cooled beam expander with adjustable divergence angle according to an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of another viewing angle of a water-cooled beam expander with adjustable divergence angle according to an embodiment of the present invention;

[0020] Figure 3 is an exploded schematic diagram of a first water-cooled lens barrel according to an embodiment of the present invention;

[0021] Figure 4 is an exploded schematic diagram of a second water-cooled lens barrel according to an embodiment of the present invention;

[0022] Figure 5 It is a structural schematic diagram of a second water pipe joint according to an embodiment of the present invention.

[0023] Explanation of the reference numerals: 100, first water-cooled lens barrel; 110, first lens barrel housing; 111, first cylindrical portion; 112, second cylindrical portion; 120, first lens; 130, first annular wall; 140, second annular wall; 150, first annular groove; 160, first waterproof pressure ring; 161, first sealing ring; 162, second sealing ring; 170, first lens pressure ring; 180, first water pipe joint; 200, second water-cooled lens barrel; 210, second lens barrel housing; 211, second thread; 220, second lens; 230, third annular wall; 240, fourth annular wall; 260, second waterproof pressure ring; 261, third sealing ring; 262, fourth sealing ring; 270, second lens pressure ring; 280, second water pipe joint; 281, waterproof ring; 300, positioning pressure ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "a", "an", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of features, integers, steps, operations, elements, modules, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, modules, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any module and all combinations of one or more associated listed items.

[0026] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0027] like Figure 1As shown, the present application provides a water-cooled collimator with adjustable divergence angle, which includes a first water-cooled lens barrel 100 and a second water-cooled lens barrel 200. The first water-cooled lens barrel 100 includes a first lens barrel housing 110, in which a first lens 120 is provided. The second water-cooled lens barrel 200 includes a second lens barrel housing 210, in which a second lens 220 is provided. An end of the first lens barrel housing 110 close to the second lens barrel housing 210 is provided with a first thread, and an end of the second lens barrel housing 210 close to the first lens barrel housing 110 is provided with a second thread 211. The first thread and the second thread 211 match each other, and the first lens barrel housing 110 and the second lens barrel housing 210 are threadedly assembled by means of the first thread and the second thread 211.

[0028] In a specific embodiment, the water-cooled beam expander with adjustable divergence angle is composed of a first water-cooled lens barrel 100 and a second water-cooled lens barrel 200. The first lens barrel housing 110 in the first water-cooled lens barrel 100 is a basic structure for carrying the internal components of the first water-cooled lens barrel 100, ensuring that the optical elements and other related components inside the first water-cooled lens barrel 100 are in a relatively stable environment. The first lens barrel housing 110 includes a first cylindrical portion 111 and a second cylindrical portion 112. The diameter of the first cylindrical portion 111 is greater than the diameter of the second cylindrical portion 112. The first cylindrical portion 111 and the second cylindrical portion 112 are integrally formed, and the first cylindrical portion 111 and the second cylindrical portion 112 are concentrically arranged. The inner wall of the second cylindrical portion 112 on one side close to the second lens barrel housing 210 is provided with a first thread. The first lens 120 placed inside the first lens barrel housing 110 is one of the core elements for optically processing the light beam. The first lens 120 is a circular convex lens. The first lens 120 participates in the beam expansion process through optical principles such as refraction. The first lens 120 is arranged in the first cylindrical portion 111 of the first lens barrel housing 110, and the first lens 120 is concentrically arranged with the first cylindrical portion 111.

[0029] The second lens barrel housing 210 in the second water-cooled lens barrel 200 is cylindrical, and the second lens barrel housing 210 also plays the role of protecting the internal components of the second water-cooled lens barrel 200 and providing structural support. A circle of second threads 211 is provided on the outer surface of the second lens barrel housing 210 near one end of the first lens barrel housing 110, and the first threads and the second threads 211 match each other. The first lens barrel housing 110 and the second lens barrel housing 210 are threadedly assembled through the first threads and the second threads 211, and the first lens barrel housing 110 and the second lens barrel housing 210 are concentrically arranged. The second lens 220 is located inside the second lens barrel housing 210, and the second lens 220 is a circular concave lens, and the second lens 220 is concentrically arranged with the second lens barrel housing 210, and the second lens 220 cooperates with the first lens 120 to achieve the beam expansion effect on the light beam.

[0030] In summary, from the perspective of ease of operation, when the beam divergence angle needs to be adjusted, the technician only needs to gently rotate one of the lens barrels, and by relying on the cooperation between the first thread and the second thread 211, the relative position between the first water-cooled lens barrel 100 and the second water-cooled lens barrel 200 can be easily changed, thereby adjusting the distance between the first lens 120 and the second lens 220, and finally achieving the purpose of adjusting the beam divergence angle. This adjustment method does not require complex tools, which improves the adjustment efficiency. On the other hand, from the perspective of cost control, compared to those beam expanders that use complex mechanical structures or electronic adjustment devices to adjust the divergence angle, the present application uses a simple threaded assembly method to achieve the purpose of adjusting the divergence angle, effectively reducing production costs.

[0031] like Figure 2 As shown, the water-cooled collimator with adjustable divergence angle also includes a positioning ring 300, which is provided with a third thread, and the third thread matches the second thread 211. The positioning ring 300 is threadedly assembled with the second lens barrel shell 210, and the positioning ring 300 is used to fix the relative positions of the first lens barrel shell 110 and the second lens barrel shell 210.

[0032] In a specific embodiment, the positioning pressing ring 300 is annular, the inner diameter of the positioning pressing ring 300 matches the diameter of the second lens barrel housing 210, a third thread matching the second thread 211 is provided on the inner wall of the positioning pressing ring 300, and the positioning pressing ring 300 is threadedly assembled with the second lens barrel housing 210. In the process of adjusting the divergence angle, when the second water-cooled lens barrel 200 is rotated to a suitable position, the positioning pressing ring 300 is rotated so that the positioning pressing ring 300 conflicts with the side wall of the first lens barrel housing 110, so that the second water-cooled lens barrel 200 can be positioned, thereby fixing the positional relationship between the first lens 120 and the second lens 220, and effectively preventing the first water-cooled lens barrel 100 and the second water-cooled lens barrel 200 from shifting due to external vibration, collision or other external force interference during the operation of the equipment, thereby causing the beam divergence angle to change.

[0033] In summary, the setting of the positioning pressure ring 300 can effectively prevent the second water-cooled lens barrel 200 from continuing to rotate due to factors such as vibration during the use of the water-cooled beam expander with adjustable divergence angle, thereby causing the laser divergence angle to change, thereby improving the practicality of the water-cooled beam expander with adjustable divergence angle.

[0034] like Figure 3As shown, a first annular wall 130 and a second annular wall 140 are provided at one end of the first lens barrel housing 110 away from the second lens barrel housing 210. The first annular wall 130 and the second annular wall 140 are concentrically arranged, and the diameter of the first annular wall 130 is greater than the diameter of the second annular wall 140. A first annular groove 150 is formed between the first annular wall 130 and the second annular wall 140, and the first annular groove 150 is used for passing cooling water.

[0035] In a specific embodiment, a circular first annular wall 130 and a circular second annular wall 140 are provided in the first cylindrical portion 111 at one end of the first lens barrel housing 110 away from the second lens barrel housing 210. The first annular wall 130, the second annular wall 140 and the first cylindrical portion 111 are all concentrically arranged, and the diameter of the first annular wall 130 is greater than the diameter of the second annular wall 140, so that an annular first annular groove 150 is formed between the first annular wall 130 and the second annular wall 140.

[0036] The first annular groove 150 is a structural space specifically used for passing cooling water, and its role is crucial. The cooling water flows in the first annular groove 150, and can take away the heat generated by the first lens barrel housing 110 and the first lens 120 and other components in contact therewith during operation. For example, when a high-power laser passes through the first water-cooled lens barrel 100, the first lens 120 will absorb part of the laser energy and convert it into heat. If the heat cannot be dissipated in time, the optical performance of the first lens 120 will be reduced, and the cooling water in the first annular groove 150 can effectively avoid this situation.

[0037] In summary, the first annular wall 130, the second annular wall 140 and the first annular groove 150 are provided to allow cooling water to pass through. From the perspective of heat dissipation performance, the first water-cooled lens barrel 100 and the first lens 120 therein can be efficiently cooled, thereby ensuring that these components can maintain stable optical performance under long-term, high-power working conditions, extending the service life of the components, and reducing equipment failures and maintenance costs caused by overheating.

[0038] like Figure 4 As shown, a third annular wall 230 and a fourth annular wall 240 are provided at one end of the second lens barrel housing 210 away from the first lens barrel housing 110, the third annular wall 230 and the fourth annular wall 240 are concentrically arranged, and the diameter of the third annular wall 230 is greater than the diameter of the fourth annular wall 240, and a second annular groove is formed between the third annular wall 230 and the fourth annular wall 240, and the second annular groove is used for passing cooling water.

[0039] In a specific embodiment, the third annular wall 230 and the fourth annular wall 240 are specific structures on the second lens barrel housing 210, similar to the annular wall structure on the first lens barrel housing 110, the circular third annular wall 230 and the circular fourth annular wall 240 are concentrically arranged, the diameter of the third annular wall 230 is greater than the diameter of the fourth annular wall 240, and the third annular wall 230 and the fourth annular wall 240 enclose a second annular groove by the difference in diameter, and the second annular groove can accommodate cooling water. The function of the second annular groove is similar to that of the first annular groove 150, mainly to dissipate heat for the second water-cooled lens barrel 200 and the second lens 220 therein.

[0040] In summary, the presence of the second annular groove can effectively dissipate the heat of the second water-cooled lens barrel 200 and the second lens 220 contained therein in a targeted manner. The heat dissipation effects of the second annular groove and the first annular groove 150 cooperate with each other to achieve comprehensive heat dissipation of the key parts of the entire water-cooled collimator with adjustable divergence angle, avoiding the problem of local overheating affecting the overall optical performance of the water-cooled collimator with adjustable divergence angle.

[0041] At the same time, the design of the first annular groove 150 and the second annular groove fully utilizes the internal space of the first lens barrel housing 110 and the second lens barrel housing 210, and incorporates the heat dissipation function without adding too much extra volume, making the overall structure of the water-cooled beam expander with adjustable divergence angle more compact and functionally complete, which is conducive to layout and installation in various complex optical equipment integration environments.

[0042] like Figure 3 As shown, the first water-cooled lens barrel 100 also includes a first sealing ring 161, a second sealing ring 162 and a first waterproof pressure ring 160. The first waterproof pressure ring 160 is fixedly assembled with the first lens barrel housing 110, and the first waterproof pressure ring 160 presses the first sealing ring 161 and the second sealing ring 162 toward the end faces of the first annular wall 130 and the second annular wall 140 respectively to seal the first annular groove 150.

[0043] In a specific embodiment, the first sealing ring 161 and the second sealing ring 162 are both circular, the diameter of the first sealing ring 161 matches the first annular wall 130, and the diameter of the second sealing ring 162 matches the second annular wall 140. In this embodiment, the first sealing ring 161 and the second sealing ring 162 are both made of nitrile rubber to ensure good waterproofness. The first waterproof pressure ring 160 is annular, and a fourth thread is provided on the inner wall of the first cylindrical portion 111, and a fifth thread is provided on the outer peripheral surface of the first waterproof pressure ring 160, and the fourth thread matches the fifth thread. The first waterproof pressure ring 160 is threadedly assembled with the first lens barrel housing 110 through the fourth thread and the fifth thread. At the same time, the first waterproof pressure ring 160 presses the first sealing ring 161 and the second sealing ring 162 against the end faces of the first annular wall 130 and the second annular wall 140 respectively to prevent cooling water from leaking from the first annular groove 150.

[0044] In summary, the coordinated use of the first sealing ring 161, the second sealing ring 162 and the first waterproof pressure ring 160 provides important sealing protection for the water-cooled expander with adjustable divergence angle, which can effectively prevent cooling water from leaking from the first annular groove 150, thereby improving the safety and stability of the equipment.

[0045] like Figure 4 As shown, the second water-cooled lens barrel 200 also includes a third sealing ring 261, a fourth sealing ring 262 and a second waterproof pressure ring 260. The second waterproof pressure ring 260 is fixedly assembled with the second lens barrel housing 210, and the second waterproof pressure ring 260 presses the third sealing ring 261 and the fourth sealing ring 262 toward the end faces of the third annular wall 230 and the fourth annular wall 240 respectively to seal the second annular groove.

[0046] In a specific embodiment, the third sealing ring 261 and the fourth sealing ring 262 are both circular, the diameter of the third sealing ring 261 matches the third annular wall 230, and the diameter of the fourth sealing ring 262 matches the fourth annular wall 240. In this embodiment, the third sealing ring 261 and the fourth sealing ring 262 are both made of nitrile rubber to ensure good waterproofness. The second waterproof pressure ring 260 is annular, and a sixth thread is provided on the inner wall of the second lens barrel housing 210. A seventh thread is provided on the outer peripheral surface of the second waterproof pressure ring 260, and the sixth thread matches the seventh thread. The second waterproof pressure ring 260 is threadedly assembled with the second lens barrel housing 210 through the sixth thread and the seventh thread. At the same time, the second waterproof pressure ring 260 presses the third sealing ring 261 and the fourth sealing ring 262 against the end faces of the third annular wall 230 and the fourth annular wall 240 respectively to prevent cooling water from leaking from the second annular groove.

[0047] In summary, the coordinated use of the third sealing ring 261, the fourth sealing ring 262 and the second waterproof pressure ring 260 provides important sealing protection for the water-cooled expander with adjustable divergence angle, which can effectively prevent cooling water from leaking from the second annular groove, thereby improving the safety and stability of the equipment.

[0048] like Figure 3 As shown, the first water-cooled lens barrel 100 also includes a first lens pressing ring 170, which is fixedly assembled at the inner ring of the first waterproof pressing ring 160, and the first lens pressing ring 170 presses the first lens 120 toward the end surface of the second annular wall 140 to fix the first lens 120.

[0049] In a specific embodiment, the first lens pressing ring 170 is in a circular ring shape, and the diameter of the first lens pressing ring 170 matches the inner ring diameter of the first waterproof pressing ring 160. A circle of eighth threads is provided on the inner ring surface of the first waterproof pressing ring 160, and a circle of ninth threads is provided on the outer peripheral surface of the first lens pressing ring 170. The eighth threads match the ninth threads. The first lens pressing ring 170 is threadedly assembled with the first waterproof pressing ring 160 through the eighth threads and the ninth threads, and the first lens pressing ring 170 presses the first lens 120 against the end face of the second annular wall 140 to fix the first lens 120.

[0050] like Figure 4 As shown, the second water-cooled lens barrel 200 also includes a second lens pressing ring 270, which is fixedly assembled at the inner ring of the second waterproof pressing ring 260, and the second lens pressing ring 270 presses the second lens 220 toward the end surface of the fourth annular wall 240 to fix the second lens 220.

[0051] In a specific embodiment, the second lens pressing ring 270 is in a circular ring shape, and the diameter of the second lens pressing ring 270 matches the inner ring diameter of the second waterproof pressing ring 260. A circle of tenth thread is provided on the inner ring surface of the second waterproof pressing ring 260, and a circle of eleventh thread is provided on the outer peripheral surface of the second lens pressing ring 270. The tenth thread matches the eleventh thread. The second lens pressing ring 270 is threadedly assembled with the second waterproof pressing ring 260 through the tenth thread and the eleventh thread, and the second lens pressing ring 270 presses the second lens 220 against the end face of the fourth annular wall 240 to fix the second lens 220.

[0052] like Figure 3 As shown, the first water-cooling lens barrel 100 further includes a first water pipe joint 180 , and the first water pipe joint 180 is connected to the first annular groove 150 .

[0053] In a specific embodiment, two first water pipe joints 180 are provided, and the two first water pipe joints 180 are respectively located at the upper and lower sides of the first lens barrel housing 110, and the first water pipe joints 180 are threadedly assembled with the first lens barrel housing 110, and the first water pipe joints 180 are connected to the first annular groove 150. The first water pipe joints 180 are externally connected to an external cooling circulation system, so that the cooling water in the external cooling circulation system can flow from the first water pipe joints 180 into the first annular groove 150 continuously, and the cooling water takes away the heat and then flows out through another first water pipe joint 180, forming a complete cooling cycle, and maintaining the heat dissipation function of the water-cooled beam expander with adjustable divergence angle. A waterproof ring 281 is also provided at the connection between the first water pipe joint 180 and the first lens barrel housing 110 to prevent the cooling water from leaking from the connection between the first water pipe joint 180 and the first lens barrel housing 110.

[0054] like Figure 5 As shown, the second water-cooling lens barrel 200 further includes a second water pipe joint 280, and the second water pipe joint 280 is connected to the second annular groove.

[0055] In a specific embodiment, two second water pipe joints 280 are provided, and the two second water pipe joints 280 are respectively located at the upper and lower sides of the second lens barrel housing 210, and the second water pipe joints 280 are threadedly assembled with the second lens barrel housing 210, and the second water pipe joints 280 are connected to the second annular groove. The two second water pipe joints 280 are externally connected to an external cooling circulation system, so that the cooling water in the external cooling circulation system can flow continuously from the second water pipe joints 280 into the second annular groove, and the cooling water takes away the heat and then flows out through another second water pipe joint 280, forming a complete cooling cycle, maintaining the heat dissipation function of the water-cooled beam expander with adjustable divergence angle. A waterproof ring 281 is also provided at the connection between the second water pipe joint 280 and the second lens barrel housing 210 to prevent the cooling water from leaking from the connection between the second water pipe joint 280 and the second lens barrel housing 210.

[0056] In summary, the first water pipe joint 180 and the second water pipe joint 280 introduce external cooling water into the first annular groove 150 and the second annular groove respectively, thereby achieving comprehensive heat dissipation of key parts at both ends of the entire water-cooled beam expander with adjustable divergence angle, ensuring that the water-cooled beam expander with adjustable divergence angle can maintain a good temperature state under different working conditions, avoiding problems such as degradation of optical performance due to overheating, and playing a key role in maintaining the water-cooled beam expander with adjustable divergence angle to output high-quality light beams.

[0057] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A water-cooled beam expander with adjustable divergence angle, characterized in that: include: a first water-cooled lens barrel and a second water-cooled lens barrel; The first water-cooled lens barrel includes a first lens barrel shell, in which a first lens is disposed, the second water-cooled lens barrel includes a second lens barrel shell, in which a second lens is disposed, a first thread is disposed at one end of the first lens barrel shell close to the second lens barrel shell, a second thread is disposed at one end of the second lens barrel shell close to the first lens barrel shell, the first thread matches the second thread, and the first lens barrel shell and the second lens barrel shell are threadedly assembled via the first thread and the second thread.

2. The water-cooled beam expander with adjustable divergence angle according to claim 1, characterized in that: The water-cooled beam expander with adjustable divergence angle also includes a positioning ring, which is provided with a third thread, and the third thread matches the second thread. The positioning ring is threadedly assembled with the second lens barrel shell, and the positioning ring is used to fix the relative positions of the first lens barrel shell and the second lens barrel shell.

3. The water-cooled beam expander with adjustable divergence angle according to claim 1, characterized in that: A first annular wall and a second annular wall are provided at one end of the first lens barrel housing away from the second lens barrel housing, the first annular wall and the second annular wall are concentrically arranged, and the diameter of the first annular wall is greater than the diameter of the second annular wall, and a first annular groove is formed between the first annular wall and the second annular wall, and the first annular groove is used for passing cooling water.

4. The water-cooled beam expander with adjustable divergence angle according to claim 1, characterized in that: A third annular wall and a fourth annular wall are provided at one end of the second lens barrel housing away from the first lens barrel housing, the third annular wall and the fourth annular wall are concentrically arranged, and the diameter of the third annular wall is greater than the diameter of the fourth annular wall, and a second annular groove is formed between the third annular wall and the fourth annular wall, and the second annular groove is used for passing cooling water.

5. The water-cooled beam expander with adjustable divergence angle according to claim 3, characterized in that: The first water-cooled lens barrel also includes a first sealing ring, a second sealing ring and a first waterproof pressure ring. The first waterproof pressure ring is fixedly assembled with the first lens barrel housing, and the first waterproof pressure ring presses the first sealing ring and the second sealing ring against the end faces of the first annular wall and the second annular wall respectively to seal the first annular groove.

6. The water-cooled beam expander with adjustable divergence angle according to claim 4, characterized in that: The second water-cooled lens barrel also includes a third sealing ring, a fourth sealing ring and a second waterproof pressure ring. The second waterproof pressure ring is fixedly assembled with the second lens barrel housing, and the second waterproof pressure ring presses the third sealing ring and the fourth sealing ring against the end faces of the third annular wall and the fourth annular wall respectively to seal the second annular groove.

7. The water-cooled beam expander with adjustable divergence angle according to claim 5, characterized in that: The first water-cooled lens barrel also includes a first lens pressing ring, which is fixedly assembled at the inner ring of the first waterproof pressing ring, and the first lens pressing ring presses the first lens toward the end surface of the second annular wall to fix the first lens.

8. The water-cooled beam expander with adjustable divergence angle according to claim 6, characterized in that: The second water-cooled lens barrel also includes a second lens pressing ring, which is fixedly assembled at the inner ring of the second waterproof pressing ring, and the second lens pressing ring presses the second lens toward the end surface of the fourth annular wall to fix the second lens.

9. The water-cooled beam expander with adjustable divergence angle according to claim 3, characterized in that: The first water-cooling lens barrel also includes a first water pipe joint, and the first water pipe joint is connected to the first annular groove.

10. The water-cooled beam expander with adjustable divergence angle according to claim 4, characterized in that: The second water-cooling lens barrel also includes a second water pipe joint, and the second water pipe joint is connected to the second annular groove.

Images