Beam expander with elasticity stabilizing effect
By employing a reference cylinder and lifting cylinder structure in the beam expander, combined with a spring and spiral groove design, the problem of lens wobbling was solved, achieving precise and stable beam adjustment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN QUALITY ENERGY OPTOELECTRONICS CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-05-19
AI Technical Summary
The lenses of existing beam expanders are prone to slight wobbling when subjected to external forces, affecting the accuracy of the beam.
It adopts a reference cylinder and lifting cylinder structure. The lifting cylinder is equipped with a lifting rod and a spring. Through the design of the spiral groove and the limiting cylinder, the spring force is used to maintain the stability of the lifting cylinder, avoid shaking, and ensure that the lens position remains unchanged.
It effectively prevents the lens from shaking under external force, ensuring the accuracy and stability of beam adjustment and improving the accuracy of beam adjustment.
Smart Images
Figure CN224263484U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of beam expander technology, and in particular to a beam expander with elastic stabilization effect. Background Technology
[0002] A beam expander is a lens assembly that can change the diameter and divergence angle of a laser beam. It changes the beam diameter through internal lenses to meet the needs of different scenarios.
[0003] For example, in laser processing applications, a beam expander needs to be installed at the beginning of the laser beam path to adjust the beam, achieve collimation of the beam or enlarge the beam spot. Therefore, the stability of the beam expander is crucial.
[0004] When adjusting the beam, beam expanders are adjusted by knobs to change the beam divergence angle. However, in existing beam expanders, after adjustment, the internal lens is prone to slight shaking when subjected to external forces, affecting the accuracy of the beam. Utility Model Content
[0005] The purpose of this invention is to solve the technical problem in the prior art that the internal lens is prone to slight shaking when affected by external forces, and to propose a beam expander with elastic stabilization effect.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A beam expander with elastic stabilization includes a reference cylinder and a lifting cylinder. The lifting cylinder is slidably connected inside the reference cylinder, and a lifting rod is fixedly connected to the side wall of the lifting cylinder. A rotating cylinder is rotatably connected to the outer wall of the reference cylinder, and a spiral groove is provided on the inner wall of the rotating cylinder. The lifting rod is engaged in the spiral groove. A spring is provided inside the reference cylinder, and the bottom of the lifting cylinder abuts against the spring. A lens is connected to the inside of the lifting cylinder and the bottom of the reference cylinder.
[0008] Preferably, the side wall of the reference cylinder is provided with a sliding groove; the lifting rod passes through the sliding groove.
[0009] Preferably, the lens is a concave lens and a convex lens; the concave lens is fixed inside the lifting cylinder; the convex lens is fixed to the inner wall of the bottom of the reference cylinder.
[0010] Preferably, a first pressure ring is threaded onto the inner wall of the top of the lifting cylinder, and the first pressure ring is in contact with the bottom of the concave lens.
[0011] Preferably, a second pressure ring is threaded onto the inner wall of the bottom of the reference cylinder, and the second pressure ring is in contact with the bottom of the convex lens.
[0012] Preferably, a limiting cylinder is threadedly connected to the outer wall of the top of the reference cylinder; the rotating cylinder is locked between the limiting cylinder and the reference cylinder.
[0013] Preferably, the outer wall of the lifting cylinder can be in contact with the inner wall of the limiting cylinder.
[0014] Preferably, both the reference cylinder and the rotating cylinder have anti-slip grooves on their outer walls.
[0015] Preferably, the top of the limiting cylinder is threadedly connected to a top cover.
[0016] Preferably, the bottom of the reference cylinder is threadedly connected to a bottom cover.
[0017] Compared with the prior art, this utility model provides a beam expander with elastic stabilization effect, which has the following beneficial effects:
[0018] 1. The beam expander with elastic stabilization effect is always subjected to the force applied by the spring when the lifting cylinder moves up and down, so that the lifting rod is always in close contact with the upper surface of the spiral groove. When the beam expander is affected by external force, it avoids the lifting cylinder from shaking slightly, ensuring that the lens is not affected, and thus ensuring the accuracy of the beam.
[0019] 2. This beam expander with elastic stabilization effect applies a force to the lifting cylinder during adjustment, preventing swaying and increasing the stability of the lifting cylinder's up-and-down movement with the help of the spring resistance, further improving the accuracy of beam adjustment. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a beam expander with elastic stabilization effect proposed in this utility model;
[0021] Figure 2 This is a cross-sectional view of a beam expander with elastic stabilization effect proposed in this utility model;
[0022] Figure 3 This is an exploded view of a beam expander with elastic stabilization effect proposed in this utility model.
[0023] In the diagram: 1. Reference cylinder; 2. Lifting cylinder; 201. Lifting rod; 202. Slide groove; 203. Rotating cylinder; 204. Spiral groove; 3. Concave lens; 301. First pressure ring; 4. Convex lens; 401. Second pressure ring; 5. Spring; 6. Limiting cylinder; 7. Top cover; 701. Bottom cover; 8. Anti-slip groove. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0026] Example:
[0027] like Figures 1-3 A beam expander with elastic stabilization includes a reference cylinder 1 and a lifting cylinder 2. Both the reference cylinder 1 and the lifting cylinder 2 are hollow cylinders. The lifting cylinder 2 is slidably connected inside the reference cylinder 1. The axes of the reference cylinder 1 and the lifting cylinder 2 are collinear. A lifting rod 201 is fixedly connected to the side wall of the lifting cylinder 2. Figure 2 The lifting rod 201 is threadedly connected to the side wall of the lifting cylinder 2.
[0028] A rotating cylinder 203 is rotatably connected to the outer wall of the reference cylinder 1. The inner wall of the rotating cylinder 203 is provided with a spiral groove 204, such as... Figure 3 The spiral groove 204 has a spiral shape, and the lifting rod 201 is stuck in the spiral groove 204.
[0029] The lifting cylinder 2 can only slide up and down within the reference cylinder 1 and cannot rotate on its own.
[0030] A spring 5 is installed inside the reference cylinder 1. The bottom of the lifting cylinder 2 abuts against the spring 5. The inside of the reference cylinder 1 is a stepped through hole. The bottom of the spring 5 abuts against the inside of the reference cylinder 1, and the top of the spring 5 abuts against the bottom of the lifting cylinder 2.
[0031] Lenses are connected inside the lifting cylinder 2 and at the bottom of the reference cylinder 1. The lenses are a concave lens 3 and a convex lens 4. The concave lens 3 is fixed inside the lifting cylinder 2, and the convex lens 4 is fixed to the inner wall at the bottom of the reference cylinder 1.
[0032] During operation, the laser beam enters through the concave lens 3, passes through the lifting cylinder 2 and the reference cylinder 1, and exits through the convex lens 4. The beam is adjusted by utilizing the characteristics of the concave lens 3 and the convex lens 4.
[0033] Depending on the actual environment, when it is necessary to adjust the lens, that is, to adjust the relative distance between the concave lens 3 and the convex lens 4, the rotating cylinder 203 is rotated. Under the action of the spiral groove 204, the lifting cylinder 2 is driven to move up and down through the lifting rod 201, thereby achieving the purpose of adjusting the relative distance between the concave lens 3 and the convex lens 4.
[0034] The side wall of the reference cylinder 1 is provided with a sliding groove 202; the lifting rod 201 passes through the sliding groove 202 and is then stuck in the spiral groove 204.
[0035] The lifting rod 201 passes through the slide groove 202, which further restricts the rotation of the lifting cylinder 2 and improves the stability of the lifting cylinder 2 when moving up and down.
[0036] During the lens adjustment process, the lifting cylinder 2 is always subjected to the force applied by the spring 5 when it moves up and down, so that the lifting rod 201 is always in close contact with the upper surface of the spiral groove 204. When the beam expander is affected by external force, the lifting cylinder 2 is prevented from shaking slightly, ensuring that the lens is not affected, that is, the concave lens 3 will not shake, and the relative distance between the concave lens 3 and the convex lens 4 will not change, thereby ensuring the accuracy of the beam.
[0037] During the adjustment process, the spring 5 applies force to the lifting cylinder 2, which not only prevents shaking, but also increases the stability of the lifting cylinder 2's up and down movement with the help of the spring 5's resistance, further improving the accuracy of the beam adjustment.
[0038] like Figure 2 and Figure 3 The top inner wall of the lifting cylinder 2 is threaded with a first pressure ring 301, which fits against the bottom of the concave lens 3. The inner wall of the lifting cylinder 2 is also a stepped cylinder, and the concave lens 3 is fixed inside the lifting cylinder 2 by the first pressure ring 301.
[0039] A second pressure ring 401 is threadedly connected to the inner wall of the bottom of the reference cylinder 1. The second pressure ring 401 is in contact with the bottom of the convex lens 4, and the convex lens 4 is fixed to the inner wall of the bottom of the reference cylinder 1 by the second pressure ring 401.
[0040] like Figures 1-3 The top outer wall of the reference cylinder 1 is threadedly connected to the limiting cylinder 6; the rotating cylinder 203 is stuck between the limiting cylinder 6 and the reference cylinder 1, so that the rotating cylinder 203 can only rotate around the reference cylinder 1.
[0041] The position of the rotating cylinder 203 is restricted by the limiting cylinder 6 to prevent the rotating cylinder 203 from falling off accidentally.
[0042] After the relative distance between the concave lens 3 and the convex lens 4 is adjusted, rotate the limiting cylinder 6 so that the limiting cylinder 6 abuts against the rotating cylinder 203, thereby locking the rotating cylinder 203 and preventing it from rotating accidentally.
[0043] like Figure 2 The outer wall of the lifting cylinder 2 can be attached to the inner wall of the limiting cylinder 6.
[0044] During the movement of the lifting cylinder 2, when it moves upward, even when the top of the lifting cylinder 2 loses contact with the reference cylinder 1, it will continue to be in contact with the inner wall of the limiting cylinder 6 to prevent the lifting cylinder 2 from shaking.
[0045] like Figure 1 The outer walls of both the reference cylinder 1 and the rotating cylinder 203 are provided with anti-slip grooves 8.
[0046] During the rotation of the rotating cylinder 203, hold the rotating cylinder 203 with one hand and the reference cylinder 1 with the other hand to rotate it.
[0047] The anti-slip groove 8 prevents the hand from slipping when gripping.
[0048] like Figure 1 and Figure 3 The top of the limiting cylinder 6 is threadedly connected to a top cover 7, and the bottom of the reference cylinder 1 is threadedly connected to a bottom cover 701.
[0049] When not in use, cover the top cover 7 and the bottom cover 701 to effectively prevent dust from entering the beam expander and protect the concave lens 3 and the convex lens 4.
[0050] When in use, simply remove the top cover 7 and the bottom cover 701.
[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A beam expander with elastic stabilization effect, comprising a reference cylinder (1) and a lifting cylinder (2), wherein the lifting cylinder (2) is slidably connected within the reference cylinder (1), characterized in that, The lifting cylinder (2) has a lifting rod (201) fixedly connected to its side wall. The outer wall of the reference cylinder (1) is rotatably connected to a rotating cylinder (203), and the inner wall of the rotating cylinder (203) is provided with a spiral groove (204), and the lifting rod (201) is stuck in the spiral groove (204); The reference cylinder (1) is equipped with a spring (5), and the bottom of the lifting cylinder (2) abuts against the spring (5); A lens is connected inside the lifting cylinder (2) and at the bottom of the reference cylinder (1).
2. The beam expander with elastic stabilization effect according to claim 1, characterized in that, The reference cylinder (1) has a sliding groove (202) on its side wall; The lifting rod (201) passes through the slide groove (202).
3. A beam expander with elastic stabilization effect according to claim 1, characterized in that, The lenses are concave lenses (3) and convex lenses (4); The concave lens (3) is fixed inside the lifting cylinder (2); The convex lens (4) is fixed to the inner wall of the bottom of the reference cylinder (1).
4. A beam expander with elastic stabilization effect according to claim 3, characterized in that, The top inner wall of the lifting cylinder (2) is threaded with a first pressure ring (301), which is in contact with the bottom of the concave lens (3).
5. A beam expander with elastic stabilization effect according to claim 3, characterized in that, The reference cylinder (1) has a second pressure ring (401) threadedly connected to the inner wall at the bottom, and the second pressure ring (401) is in contact with the bottom of the convex lens (4).
6. A beam expander with elastic stabilization effect according to claim 1, characterized in that, The reference cylinder (1) is threadedly connected to the outer wall of the top of the limiting cylinder (6). The rotating cylinder (203) is positioned between the limiting cylinder (6) and the reference cylinder (1).
7. A beam expander with elastic stabilization effect according to claim 6, characterized in that, The outer wall of the lifting cylinder (2) can be attached to the inner wall of the limiting cylinder (6).
8. A beam expander with elastic stabilization effect according to claim 1, characterized in that, The outer walls of both the reference cylinder (1) and the rotating cylinder (203) are provided with anti-slip grooves (8).
9. A beam expander with elastic stabilization effect according to claim 6, characterized in that, The top of the limiting cylinder (6) is threadedly connected to a top cover (7).
10. A beam expander with elastic stabilization effect according to any one of claims 1-9, characterized in that, The bottom of the reference cylinder (1) is threadedly connected to a bottom cover (701).