Laser beam shaping device
By adjusting the lens distance and surface shape in the laser beam shaping device, the problem of insufficient beam ellipticity control in traditional laser processing systems is solved, achieving effective adjustment of beam ellipticity and improvement of processing accuracy, which is suitable for industrial laser processing equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HANS SCANNER S&T CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional laser processing systems cannot effectively control beam ellipticity, resulting in reduced processing accuracy.
The distance between the first and second lenses is adjusted using an adjustment component, and the lens surfaces are respectively set to flat, concave, or convex surfaces. The distance and surface shape between the lenses are adjusted by the adjustment component to correct the light beam and adjust its ellipticity.
It effectively adjusts the ellipticity of the beam, improves processing accuracy, has a simple lens structure, small size, is easy to mass-produce, and is suitable for various industrial laser processing equipment.
Smart Images
Figure CN224203522U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of laser technology, and in particular to a laser beam shaping device. Background Technology
[0002] Since its invention, lasers have rapidly demonstrated their wide application potential in various fields such as scientific research, industry, medicine, and communications due to their unique characteristics such as good monochromaticity, strong coherence, and excellent directionality. Among them, the industrial field is one of the most widespread applications of laser technology. The emergence of technologies such as laser cutting, laser welding, laser marking, and laser surface treatment has greatly improved the efficiency and quality of industrial production. With the widespread application of laser technology, the requirements for laser beam quality are also becoming increasingly stringent. Parameters such as beam ellipticity, energy distribution uniformity, and divergence angle have become important indicators for measuring laser beam quality.
[0003] However, traditional laser processing systems cannot effectively control the ellipticity of the beam, which may cause the focal shape to deviate from the ideal state during processing, resulting in reduced processing accuracy.
[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content
[0005] In view of the above, embodiments of this application provide a laser beam shaping device, which adopts the following technical solution, including:
[0006] The adjustment assembly includes a first lens and a second lens disposed within the adjustment assembly. The first lens and the second lens are arranged sequentially along the incident direction of the light. The laser beam shaping device adjusts the distance between the first lens and the second lens through the adjustment assembly. One side of the first lens and the second lens are respectively set as a plane, and one of the other sides of the first lens and the second lens is selected from a concave surface and the other is selected from a convex surface.
[0007] Furthermore, the first lens includes a first surface and a second surface, and the second lens includes a third surface and a fourth surface. The first surface and the fourth surface are respectively configured as planes, the second surface is configured as a concave surface, and the third surface is configured as a convex surface.
[0008] Furthermore, the second surface is disposed adjacent to the second lens and is recessed in the opposite direction to the incident direction of light, and the third surface is disposed adjacent to the first lens and is convex in the opposite direction to the incident direction of light.
[0009] Furthermore, in the direction of light incidence, the distance D1 between the second and third surfaces is 0-6 mm.
[0010] Furthermore, the radius of the second face is 712.5-787.5 mm; and / or,
[0011] The radius of the third surface is 712.5-787.5 mm.
[0012] Furthermore, in the direction of light incidence, the center thickness T1 of the first lens is 1.9-2.1 mm; and / or,
[0013] The center thickness T2 of the second lens is 1.9-2.1 mm.
[0014] Furthermore, the ratio of the refractive index to the Abbe number of the first lens is 2.0501%-2.2659%; and / or,
[0015] The ratio of the refractive index to the Abbe number of the second lens is 2.0501%-2.2659%.
[0016] Furthermore, the entrance pupil diameter of the laser beam shaping device is less than or equal to 20 mm; and / or,
[0017] The wavelength of the light is λ = 400-2000nm.
[0018] Furthermore, the ellipticity adjustment range of the laser beam shaping device is 0.7-1.
[0019] Furthermore, the adjustment assembly includes a first connector, a second connector, and an adjustment member for adjusting the distance between the first connector and the second connector, wherein the first lens is disposed on the first connector and the second lens is disposed on the second connector.
[0020] Compared with the prior art, this application has the following advantages: This application adjusts the distance between the first lens and the second lens by adjusting the adjustment component, and sets the surfaces of the first lens and the second lens as plane, concave or convex respectively, which corrects the incident light and can effectively adjust the ellipticity of the beam. At the same time, the lens has a simple structure, small size, is easy to mass-produce, and is suitable for widespread application in various industrial laser processing equipment. Attached Figure Description
[0021] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of the laser beam shaping device according to an embodiment of this application;
[0023] Figure 2 This is an exploded view of the laser beam shaping device according to an embodiment of this application;
[0024] Figure 3 This is a partial cross-sectional view of the laser beam shaping device according to an embodiment of this application;
[0025] Figure 4 This is a cross-sectional view of the laser beam shaping device according to an embodiment of this application;
[0026] Figure 5 yes Figure 4 Enlarged diagram of A in the middle;
[0027] Figure 6 This is an optical path diagram of the laser beam shaping device according to an embodiment of this application;
[0028] Figure 7 This is the light spot image before adjustment;
[0029] Figure 8 It is the spot pattern after being adjusted by the laser beam shaping device according to the embodiments of this application.
[0030] Reference numerals: 1. First lens; 11. First surface; 12. Second surface; 21. Third surface; 22. Fourth surface; 2. Second lens; 3. First connector; 4. Second connector; 5. Adjustment component. Detailed Implementation
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application.
[0034] In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operating state, specifically the orientation shown in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative purposes and do not impose numerical requirements or establish a numerical order.
[0035] In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.
[0036] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one," "at least one of the following," or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, "at least one of a, b, or c," or "at least one of a, b, and c," can both mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple.
[0037] Various embodiments of this application may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a hard limitation on the scope of this application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Furthermore, whenever a numerical range is referred to herein, it means including any referenced number (fraction or integer) within the referred range.
[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0039] As attached Figure 1 To be continued Figure 8 As shown in the figure, this application provides a laser beam shaping device, including an adjustment component and a first lens 1 and a second lens 2 disposed within the adjustment component. The first lens 1 and the second lens 2 are arranged sequentially along the incident direction of the light. The laser beam shaping device adjusts the distance between the first lens 1 and the second lens 2 through the adjustment component. One side of the first lens 1 and the second lens 2 is respectively set as a plane, and one of the other sides of the first lens 1 and the second lens 2 is selected from a concave surface and the other is selected from a convex surface.
[0040] This application adjusts the distance between the first lens 1 and the second lens 2 using the adjustment component, and sets the surfaces of the first lens 1 and the second lens 2 to be plane, concave or convex respectively, thereby correcting the incident light and effectively adjusting the ellipticity of the beam. At the same time, the lens has a simple structure, small size, and is easy to mass-produce, making it suitable for widespread application in various industrial laser processing equipment.
[0041] As attached Figure 3 To be continued Figure 5 As shown, the first lens 1 further includes a first surface 11 and a second surface 12, and the second lens 2 includes a third surface 21 and a fourth surface 22. The first surface 11 and the fourth surface 22 are respectively set as planes, the second surface 12 is set as a concave surface, and the third surface 21 is set as a convex surface. The concave surface can change the cross-sectional shape of the light beam by diverging the light rays, and the convex surface can converge the light rays in the direction of the minor axis or the major axis, making the minor axis shorter or changing its proportional relationship with the major axis, thereby changing the ellipticity and correcting the incident light rays, which can effectively adjust the ellipticity of the light beam.
[0042] As attached Figure 3 To be continued Figure 6 As shown, the second surface 12 is disposed adjacent to the second lens 2, and the second surface 12 is concave in the opposite direction to the incident direction of the light. The third surface 21 is disposed adjacent to the first lens 1, and the third surface 21 is convex in the opposite direction to the incident direction of the light. The first lens 1 is a plano-concave cylindrical lens, which can change the cross-sectional shape of the light beam by diverging the light. The second lens 2 is a plano-convex cylindrical lens, which can converge the light in the short axis or long axis direction, making the short axis shorter or changing its ratio with the long axis, thereby changing the ellipticity and correcting the incident light. It can effectively adjust the ellipticity of the beam and is suitable for wide application in various industrial laser processing equipment.
[0043] As attached Figure 3 To be continued Figure 6 As shown, further, in the incident direction of the light, the distance D1 between the second surface 12 and the third surface 21 is 0-6mm. By adjusting the appropriate distance D1 through the adjustment component, the light beam obtains a suitable ellipticity after passing through the laser beam shaping device, so as to meet the different ellipticity requirements of various industrial laser processing equipment. The adjustment is convenient, the structure is simple, the size is small, and it is convenient for mass production.
[0044] As attached Figure 3 To be continued Figure 6 As shown, further, the radius of the second surface 12 is 712.5-787.5 mm; and / or,
[0045] The radius of the third surface 21 is 712.5-787.5 mm.
[0046] By adjusting the radius of the second surface 12 and / or the third surface 21, the ellipticity of the beam can be further adjusted to meet the different ellipticity requirements of various industrial laser processing equipment. It is easy to adjust, has a simple structure, small size, is easy to mass-produce, and is suitable for widespread application in various industrial laser processing equipment.
[0047] Furthermore, regarding the incident direction of light, taking the intersection of the sphere and the principal optical axis as a reference, if the center of the sphere is to the left of this point, the radius of curvature is negative. Conversely, if the center of the sphere is to the right of this point, the radius of curvature is positive. In this application, the radii of curvature of the second surface 12 and the third surface 21 are both positive. The radii of curvature of the first surface 11 and the fourth surface 22 are both negative; preferably, the radius of the second surface 12 and the radius of the third surface 21 are both 750 mm.
[0048] Furthermore, the radii of the first face 11 and the fourth face 22 are both ∞. That is, the first face 11 and the fourth face 22 are planes.
[0049] As attached Figure 3 To be continued Figure 6 As shown, further, in the incident direction of light, the center thickness T1 of the first lens 1 is 1.9-2.1 mm; and / or,
[0050] The center thickness T2 of the second lens 2 is 1.9-2.1 mm.
[0051] The ellipticity of the beam can be further adjusted by adjusting the thickness of the first lens 1 and / or the second lens 2. The adjustment is convenient, the structure is simple, the size is small, and it is easy to mass-produce. It is suitable for widespread application in various industrial laser processing equipment. Preferably, the thickness T1 of the first lens 1 and the thickness T2 of the second lens 2 are 2mm.
[0052] As attached Figure 3 To be continued Figure 6 As shown, further, the ratio of the refractive index to the Abbe number of the first lens 1 is 2.0501%-2.2659%; and / or,
[0053] The ratio of the refractive index to the Abbe number of the second lens 2 is 2.0501%-2.2659%.
[0054] By rationally selecting the ratio of refractive index to Abbe number, the convergence or divergence of the beam in different directions can be better controlled, and the ellipticity of the beam can be precisely adjusted. The adjustment is convenient, the structure is simple, the size is small, and it is easy to mass-produce. It is suitable for widespread application in various industrial laser processing equipment.
[0055] Furthermore, the first lens 1 has a refractive index Nd = 1.4585 and an Abbe number Vd = 67.6. Similarly, the second lens 2 has a refractive index Nd = 1.4585 and an Abbe number Vd = 67.6. Here, Nd is the refractive index of the medium at the d-line (wavelength 1064nm, helium yellow line). Preferably, the ratio of the refractive index to the Abbe number of the first lens 1 and the ratio of the refractive index to the Abbe number of the second lens 2 are both 2.158%.
[0056] As attached Figure 3 To be continued Figure 6 As shown, further, the entrance pupil diameter of the laser beam shaping device is less than or equal to 20 mm; and / or,
[0057] The wavelength of the light is λ = 400-2000nm.
[0058] The size of the entrance pupil diameter determines the range of light beams that can enter the optical system. By selecting an appropriate entrance pupil diameter and wavelength, the layout of the first lens 1, the second lens 2, and other optical elements can be arranged reasonably, which helps to reduce the ellipticity changes caused by differences in the divergence or convergence of light in different directions, making the beam shape easier to control and adjust.
[0059] Furthermore, preferably, the entrance pupil diameter of the laser beam shaping device is 14mm, the wavelength of the light is λ=1064nm, and the maximum entrance pupil diameter of the laser beam shaping device is 20mm.
[0060] Furthermore, the ellipticity adjustment range of the laser beam shaping device is 0.7-1.
[0061] The ellipticity adjustment range is wide, meeting the different ellipticity requirements of various industrial laser processing equipment. It is easy to adjust, has a simple structure, small size, and is convenient for mass production. Preferably, the ellipticity adjustment range of the laser beam shaping device is 0.996-1.
[0062] Furthermore, the first lens 1 in this application is a plano-concave cylindrical lens, which can change the cross-sectional shape of the light beam by diverging the light rays, while the second lens 2 is a plano-convex cylindrical lens, which can converge the light rays in the direction of the minor axis or major axis, making the minor axis shorter or changing its ratio with the major axis. Therefore, the light beam passing through the laser beam shaping device is reduced in a specific direction (such as the major axis), resulting in a significant reduction in the spot size in that direction. This causes the spot shape to change from an ellipse to a near-circular or circular shape, while the spot diameter in another direction perpendicular to the stretching direction (such as the minor axis) remains basically unchanged. This reduces the ratio of the major axis to the minor axis of the equivalent ellipse of the spot, i.e., reduces the ellipticity, thereby changing the ellipticity and correcting the incident light rays, effectively adjusting the ellipticity of the light beam. Similarly, when a beam is stretched in a specific direction, the size of the spot in that direction increases significantly, causing the spot shape to change from a circle or near-circle to an ellipse. Meanwhile, the diameter of the spot in the other direction perpendicular to the stretching direction remains basically unchanged, which increases the ratio of the major axis to the minor axis of the equivalent ellipse of the spot, i.e., increases the ellipticity.
[0063] As attached Figure 6 To be continued Figure 8 As shown, taking an incident beam with a diameter of 20mm and a roundness of 1 as an example, the beam is incident into the laser beam shaping device. The curvature of the first lens 1 and the second lens 2 is 750mm, the thickness of the first lens 1 and the second lens 2 is 3mm, the distance between the first lens 1 and the second lens 2 is 6mm, and the distance between the beam measurement point and the exit plane of the laser beam shaping device is 200mm. After adjustment by the laser beam shaping device, the diameter of the beam will be stretched to 20.072mm in the horizontal direction. Of course, the beam diverges and then focuses inside the laser beam shaping device, thereby achieving the purpose of fine-tuning the ellipticity of the beam. In the horizontal direction, the beam spot diameter will slightly decrease as the distance of the measurement point increases, while in the vertical direction, the beam will not be stretched, that is, the beam diameter remains 20mm. At this time, the beam ellipticity is 20 / 20.072 = 0.996.
[0064] As attached Figure 1 To be continued Figure 5As shown, the adjustment assembly further includes a first connector 3, a second connector 4, and an adjustment component 5 for adjusting the distance between the first connector 3 and the second connector 4. The first lens 1 is disposed on the first connector 3, and the second lens 2 is disposed on the second connector 4. By rotating the adjustment component 5, the distance D1 between the first lens 1 and the second lens 2 can be adjusted, correcting the incident light and effectively adjusting the ellipticity of the beam. Furthermore, this lens has a simple structure, small size, and is easy to mass-produce, making it suitable for widespread application in various industrial laser processing equipment.
[0065] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.
Claims
1. A laser beam shaping device, characterized in that, The device includes an adjustment assembly and a first lens (1) and a second lens (2) disposed within the adjustment assembly. The first lens (1) and the second lens (2) are arranged sequentially along the incident direction of the light. The laser beam shaping device adjusts the distance between the first lens (1) and the second lens (2) through the adjustment assembly. One side of the first lens (1) and the second lens (2) are respectively set as a plane. One of the other sides of the first lens (1) and the second lens (2) is selected from a concave surface and the other is selected from a convex surface.
2. The laser beam shaping device according to claim 1, characterized in that, The first lens (1) includes a first surface (11) and a second surface (12), and the second lens (2) includes a third surface (21) and a fourth surface (22). The first surface (11) and the fourth surface (22) are respectively set as planes, the second surface (12) is set as a concave surface, and the third surface (21) is set as a convex surface.
3. The laser beam shaping device according to claim 2, characterized in that, The second surface (12) is disposed adjacent to the second lens (2), and the second surface (12) is recessed in the opposite direction to the incident direction of the light. The third surface (21) is disposed adjacent to the first lens (1), and the third surface (21) is convex in the opposite direction to the incident direction of the light.
4. The laser beam shaping device according to claim 2, characterized in that, In the direction of light incidence, the distance D1 between the second surface (12) and the third surface (21) is 0-6 mm.
5. The laser beam shaping device according to claim 2, characterized in that, The radius of the second surface (12) is 712.5-787.5 mm; and / or, The radius of the third surface (21) is 712.5-787.5 mm.
6. The laser beam shaping device according to claim 1, characterized in that, In the direction of light incidence, the center thickness T1 of the first lens (1) is 1.9-2.1 mm; and / or, The center thickness T2 of the second lens (2) is 1.9-2.1 mm.
7. The laser beam shaping device according to claim 1, characterized in that, The refractive index to Abbe number ratio of the first lens (1) is 2.0501%-2.2659%; and / or, The ratio of the refractive index to the Abbe number of the second lens (2) is 2.0501%-2.2659%.
8. The laser beam shaping apparatus according to any one of claims 1-7, characterized in that, The entrance pupil diameter of the laser beam shaping device is less than or equal to 20 mm; and / or, The wavelength of the light is λ = 400-2000nm.
9. The laser beam shaping apparatus according to any one of claims 1-7, characterized in that, The ellipticity adjustment range of the laser beam shaping device is 0.7-1.
10. The laser beam shaping apparatus according to any one of claims 1-7, characterized in that, The adjustment assembly includes a first connector (3), a second connector (4), and an adjustment member (5) for adjusting the distance between the first connector (3) and the second connector (4). The first lens (1) is disposed on the first connector (3), and the second lens (2) is disposed on the second connector (4).