Laser beam expander
Patent Information
- Application Number
- CN202522226682.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-10-21
AI Technical Summary
然而，实际使用时，在旋转镜筒的过程中，由于螺纹之间的配合有间隙，因此经常会出现两块透镜发生偏移而不同轴的情况，这会降低激光扩束镜对激光的调节精度，因此上述问题亟待解决
[0014]本申请实施例提供的激光扩束镜在使用时，需要首先确保激光光束依次经过第二透镜和第一透镜，然后再通过旋转的方式调节第一镜筒和第二镜筒的相对位置，从而改变第一透镜和第二透镜的间距，进而改变第一透镜和第二透镜对激光光束的直径与发散角的调节效果，以满足不用的使用需求。上述激光扩束镜由于设置有第一镜筒和第二镜筒，第一镜筒包括相连且同轴设置的第一连接段和导向段，第二镜筒套设在第一镜筒的一端且与第一镜筒同轴设置，第二连接段和第一连接段螺纹连接，导向配合段套设在导向段的外侧且二者贴合。因此当用户旋转第一镜筒或第二镜筒来对第一透镜和第二透镜的相对位置进行调节时，第一镜筒的导向段与第二镜筒的导向配合段嵌套配合能够对第一镜筒相对于第二镜筒的移动进行导向，从而限定第一镜筒相对于第二镜筒只能沿自身轴向进行移动，而第一镜筒与第二镜筒是同轴设置的，因此可以保证第一镜筒和第二镜筒在相对移动的过程中不会出现因移动方向偏移而不同轴的情况，进而保证了第一透镜和第二透镜可以沿轴向稳定地移动，起到提高激光扩束镜在使用过程中的稳定性与调节精度的效果。
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Figure CN224873775U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical technology, and in particular to a laser beam expander. Background Technology
[0002] A laser beam expander is an industrial optical device composed of two or more lenses. Its core function is to adjust the diameter and divergence angle of the laser beam, thereby improving the efficiency and accuracy of laser processing.
[0003] Currently, common laser beam expanders typically consist of two lenses and two lens barrels. The two lenses are housed within two separate lens barrels, which are connected by threads. In use, the laser beam to be adjusted is first passed through the two lenses. Then, the distance between the two lenses can be changed by rotating the lens barrels, thereby altering the diameter and divergence angle of the laser beam. However, in actual use, due to gaps in the threaded connection, the two lenses often become misaligned during lens barrel rotation, reducing the beam expander's adjustment accuracy. Therefore, this problem urgently needs to be addressed. Utility Model Content
[0004] This application provides a laser beam expander, which includes a first lens barrel, a first lens, a second lens barrel, and a second lens. The first lens barrel has a first inner cavity and includes a first connecting section and a guide section that are connected and coaxially arranged. The first lens is disposed in the first inner cavity. The second lens barrel is sleeved on one end of the first lens barrel and coaxially arranged with it. The second lens barrel has a second inner cavity that communicates with the first inner cavity. The second lens barrel includes a guide mating section and a second connecting section that are connected and coaxially arranged. The second connecting section and the first connecting section are threaded together. The guide mating section is sleeved on the outside of the guide section and the two are in contact. The second lens is disposed in the second inner cavity.
[0005] Optionally, in some embodiments, the first connecting segment is located at the end of the guide segment away from the first lens; the guide mating segment is located at the end of the second connecting segment away from the second lens.
[0006] Optionally, in some embodiments, the outer sidewall of the first connecting segment is provided with an external thread segment, and the inner sidewall of the second connecting segment is provided with an internal thread segment adapted to the external thread segment.
[0007] Optionally, in some embodiments, the length of the first connecting segment in its own axial direction is less than the length of the guide mating segment in its own axial direction.
[0008] Optionally, in some embodiments, the inner diameter of the guide section is larger than the inner diameter of the second connecting section; the outer diameter of the guide section is larger than the outer diameter of the first connecting section.
[0009] Optionally, in some embodiments, the end of the first connecting segment away from the guide segment is chamfered.
[0010] Optionally, in some embodiments, the first lens barrel further includes a limiting section connected to one end of the guide section away from the first connecting section. The outer diameter of the limiting section is larger than the outer diameter of the guide section. A limiting plane is provided between the limiting section and the guide section. The limiting plane is used to abut against the guide mating section and prevent the first lens barrel from continuing to enter the second lens barrel.
[0011] Optionally, in some embodiments, the inner wall of the first inner cavity is provided with a first step, and the first lens is embedded in the first step.
[0012] Optionally, in some embodiments, the inner wall of the second inner cavity is provided with a second step, and the second lens is embedded in the second step.
[0013] Optionally, in some embodiments, the second lens is a diverging lens used to expand the divergence angle of the laser beam; the first lens is a collimating lens used to collimate and correct the laser beam after passing through the second lens.
[0014] When using the laser beam expander provided in this application embodiment, it is necessary to first ensure that the laser beam passes through the second lens and the first lens in sequence. Then, the relative positions of the first and second lens barrels are adjusted by rotation, thereby changing the distance between the first and second lenses, and thus changing the adjustment effect of the first and second lenses on the diameter and divergence angle of the laser beam to meet different usage requirements. The laser beam expander described above is provided with a first lens barrel and a second lens barrel. The first lens barrel includes a first connecting section and a guide section that are connected and coaxially arranged. The second lens barrel is sleeved on one end of the first lens barrel and coaxially arranged with it. The second connecting section and the first connecting section are threaded together, and the guide section is sleeved on the outside of the guide section, with the two fitting together. Therefore, when the user rotates the first or second lens barrel to adjust the relative position of the first and second lenses, the nested cooperation of the guide section of the first lens barrel and the guide mating section of the second lens barrel guides the movement of the first lens barrel relative to the second lens barrel. This limits the movement of the first lens barrel relative to the second lens barrel to its own axis. Since the first and second lens barrels are coaxially arranged, it can be ensured that the first and second lens barrels will not become misaligned due to deviation in the direction of movement during relative movement. This ensures that the first and second lenses can move stably along the axis, thereby improving the stability and adjustment accuracy of the laser beam expander during use. Attached Figure Description
[0015] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of the laser beam expander in some embodiments of this application.
[0017] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the laser beam expander.
[0018] Labeling Explanation: 100, Laser Beam Expander; 10, First Lens Tube; 101, First Inner Cavity; 1011, First Step; 102, First Connecting Section; 1021, External Thread Section; 103, Guide Section; 104, Limiting Section; 1041, Limiting Plane; 11, First Lens; 12, Second Lens Tube; 121, Second Inner Cavity; 1211, Second Step; 122, Second Connecting Section; 1221, Internal Thread Section; 123, Guide and Fitting Section; 13, Second Lens. Detailed Implementation
[0019] 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. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.
[0020] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.
[0021] Furthermore, in addition to indicating location or state relationships, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0022] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0023] Furthermore, unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0024] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. For example, the term "comprising" used throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem and basically achieve the technical effect within a certain margin of error.
[0025] Please see Figure 1 and Figure 2 (The dashed line in the figure represents the schematic path of the laser beam.) An embodiment of this application provides a laser beam expander 100, which is used to adjust the diameter and divergence angle of the laser beam, thereby improving the processing efficiency and application accuracy of the laser beam. The laser beam expander 100 includes a first lens barrel 10, a first lens 11, a second lens barrel 12, and a second lens 13.
[0026] The first lens barrel 10 is provided with a first inner cavity 101, and the first inner cavity 101 is along the axial direction O of the first lens barrel 10 (see Figure 2 A first lens 10 extends through the first lens barrel 10. The first lens barrel 10 includes a first connecting section 102 and a guide section 103 that are connected and coaxially arranged. Both the first connecting section 102 and the guide section 103 are at least part of the structure of the first lens barrel 10, and both are generally cylindrical. A first lens 11 is disposed in the first inner cavity 101, and the first lens 11 is coaxially arranged with the first lens barrel 10.
[0027] The second lens barrel 12 is sleeved on one end of the first lens barrel 10 and is coaxially arranged with the first lens barrel 10. The second lens barrel 12 has a second inner cavity 121 communicating with the first inner cavity 101, and the second inner cavity 121 extends through the second lens barrel 12 along the axial direction O. The second lens barrel 12 includes a guide fitting section 123 and a second connecting section 122 that are connected and coaxially arranged. The guide fitting section 123 and the second connecting section 122 are both at least part of the structure of the second lens barrel 12, and both the guide fitting section 123 and the second connecting section 122 are generally cylindrical. The second connecting section 122 and the first connecting section 102 are threadedly connected, and the guide fitting section 123 is sleeved on the outside of the guide section 103 and the two fit together. The second lens 13 is disposed in the second inner cavity 121, and the second lens 13 is coaxially arranged with the second lens barrel 12, therefore the second lens 13 is also coaxially arranged with the first lens 11.
[0028] With the above settings, when using the laser beam expander 100, it is necessary to first ensure that the laser beam passes through the second lens 13 and the first lens 11 in sequence, and then adjust the relative position of the first lens barrel 10 and the second lens barrel 12 by rotation, thereby changing the distance between the first lens 11 and the second lens 13, and thus changing the adjustment effect of the first lens 11 and the second lens 13 on the diameter and divergence angle of the laser beam to meet different usage requirements. When the user rotates the first lens barrel 10 or the second lens barrel 12 to adjust the relative position of the first lens 11 and the second lens 13, the guide section 103 of the first lens barrel 10 and the guide mating section 123 of the second lens barrel 12 nest together to guide the movement of the first lens barrel 10 relative to the second lens barrel 12. This limits the movement of the first lens barrel 10 relative to the second lens barrel 12 to its own axis O. Since the first lens barrel 10 and the second lens barrel 12 are coaxially arranged, it can be ensured that the first lens barrel 10 and the second lens barrel 12 will not become out of axis due to the deviation of the movement direction during relative movement. This ensures that the first lens 11 and the second lens 13 can move stably along the axis O, thereby improving the stability and adjustment accuracy of the laser beam expander 100 during use.
[0029] Please see Figure 2In some embodiments, the second lens 13 is a diverging lens, used to widen the divergence angle of the laser beam. The first lens 11 is a collimating lens, used to collimate and correct the laser beam after passing through the second lens 13. As a specific example, in this embodiment, the second lens 13 is a concave lens, which has a diverging effect on the laser beam, thereby widening the divergence angle of the laser beam. The second lens 13 is also a convex lens, which has a converging effect on the laser beam, used to collimate the laser beam after passing through the second lens 13. In other embodiments, the second lens 13 can also be other types of lenses that have a diverging effect on the laser beam, and the first lens 11 can also be other types of lenses that have a converging effect on the laser beam; the specific types of the second lens 13 and the first lens 11 are not limited.
[0030] With the above settings, when the laser beam passes through the laser beam expander 100, it first passes through the second lens 13 to achieve laser beam diffusion, and then passes through the first lens 11 to achieve laser beam convergence and collimation, ultimately achieving the purpose of changing the diameter of the laser beam.
[0031] Please see Figure 2 In some embodiments, the inner wall of the first inner cavity 101 is provided with a first step 1011, and the first lens 11 is embedded in the first step 1011. The first step 1011 is an annular groove structure provided on the inner wall of the first inner cavity 101. The first lens 11 is embedded in the first step 1011, and the first step 1011 can support the first lens 11 and provide installation space for the first lens 11.
[0032] In some embodiments, the first lens 11 is attached to the surface of the first step 1011. Therefore, the first step 1011 can not only support the first lens 11, but also limit the first lens 11, which can prevent the first lens 11 from moving in the direction perpendicular to its own axis O, thereby improving the stability and adjustment accuracy of the laser beam expander 100.
[0033] Please see Figure 2 In some embodiments, the inner wall of the second inner cavity 121 is provided with a second step 1211, and the second lens 13 is embedded in the second step 1211. The second step 1211 is an annular groove structure provided on the inner wall of the second inner cavity 121. The second lens 13 is embedded in the second step 1211, which can support the second lens 13 and provide installation space for the second lens 13.
[0034] In some embodiments, the second lens 13 is attached to the surface of the second step 1211. Therefore, the second step 1211 can not only support the second lens 13, but also limit the second lens 13, thereby preventing the second lens 13 from moving in the direction perpendicular to its own axis O, thus improving the stability and adjustment accuracy of the laser beam expander 100.
[0035] Please see Figure 2 In some embodiments, the first connecting segment 102 is located at the end of the guide segment 103 away from the first lens 11. The guide mating segment 123 is located at the end of the second connecting segment 122 away from the second lens 13. With the above arrangement, since the second lens barrel 12 is sleeved on one end of the first lens barrel 10, when the separated first lens barrel 10 and second lens barrel 12 are connected, the first connecting segment 102 first inserts and passes through the guide mating segment 123, and then the first connecting segment 102 and the second connecting segment 122 are threadedly connected. At this time, the guide mating segment 123 also moves to the outside of the guide segment 103 and fits against the guide segment 103, thus completing the connection between the first lens barrel 10 and the second lens barrel 12. The operation is simple and convenient.
[0036] Please see Figure 2 In some embodiments, the outer wall of the first connecting segment 102 is provided with an external thread segment 1021, which is an external thread provided on the outer wall of the first connecting segment 102. The inner wall of the second connecting segment 122 is provided with an internal thread segment 1221 adapted to the external thread segment 1021, which is an internal thread provided on the inner wall of the second connecting segment 122. With the above configuration, the first connecting segment 102 can be rotatably inserted into the second connecting segment 122, and the connection between the first connecting segment 102 and the second connecting segment 122 is realized through the thread engagement of the external thread segment 1021 and the internal thread segment 1221. Furthermore, the user can adjust the relative position of the first lens barrel 10 and the second lens barrel 12 by rotating the first lens barrel 10 or the second lens barrel 12, thereby changing the distance between the first lens 11 and the second lens 13 along the axial direction O.
[0037] Please see Figure 2In some embodiments, the length of the first connecting segment 102 along its own axial direction O is less than the length of the guide mating segment 123 along its own axial direction O. This arrangement ensures that when the separated first lens barrel 10 and second lens barrel 12 are connected, the guide mating segment 123 will be fitted onto the outside of the guide segment 103 before the first connecting segment 102 is threaded into the second connecting segment 122. At this time, as the first lens barrel 10 continues to be inserted into the second lens barrel 12, the guide mating segment 123 can cooperate with the guide segment 103 to allow the first connecting segment 102 to more smoothly enter the second connecting segment 122 along the axial direction O to complete the threaded connection. Therefore, this arrangement facilitates the connection of the first lens barrel 10 and the second lens barrel 12 by the user.
[0038] Please see Figure 2 In some embodiments, the inner diameter of the guide section 123 is larger than the inner diameter of the second connecting section 122. The outer diameter of the guide section 103 is larger than the outer diameter of the first connecting section 102. With this configuration, since the inner diameter of the guide section 123 is larger than the inner diameter of the second connecting section 122, when the user connects the separated first lens barrel 10 and the second lens barrel 12, the first connecting section 102 will first insert into the guide section 123 with the larger inner diameter, and then into the second connecting section 122. Therefore, the guide section 123 will not obstruct the movement of the first connecting section 102, ensuring a smooth connection between the first lens barrel 10 and the second lens barrel 12.
[0039] Please see Figure 2 In some embodiments, the end of the first connecting segment 102 away from the guide segment 103 is provided with a chamfer (not shown in the figure). The chamfer makes it easier for the first connecting segment 102 to be inserted into the second connecting segment 122 to complete the connection between the two, which can facilitate the user to connect the first lens barrel 10 and the second lens barrel 12.
[0040] Please see Figure 2 In some embodiments, the first lens barrel 10 further includes a limiting section 104, which is at least a part of the structure of the first lens barrel 10 and is generally cylindrical. The limiting section 104 is connected to the end of the guide section 103 opposite to the first connecting section 102. The outer diameter of the limiting section 104 is larger than the outer diameter of the guide section 103. A limiting plane 1041 is provided between the limiting section 104 and the guide section 103. The limiting plane 1041 is annular in shape and is perpendicular to the axial direction O of the first lens barrel 10. The limiting plane 1041 is used to abut against the guide mating section 123 and prevent the first lens barrel 10 from continuing to enter the second lens barrel 12.
[0041] With the above settings, when the user connects the first lens barrel 10 and the second lens barrel 12 which are separate from each other, as the first lens barrel 10 is continuously inserted into the second lens barrel 12, the guide mating section 123 will gradually move closer to the limiting section 104 and eventually abut against the limiting plane 1041. At this time, the limiting plane 1041 can prevent the first lens barrel 10 from continuing to penetrate into the second lens barrel 12, thus avoiding structural damage caused by the first lens barrel 10 being over-inserted into the second lens barrel 12.
[0042] In summary, the embodiments of this application provide a laser beam expander 100. When using the laser beam expander 100, it is necessary to first ensure that the laser beam passes through the second lens 13 and the first lens 11 in sequence, and then adjust the relative position of the first lens barrel 10 and the second lens barrel 12 by rotation, thereby changing the distance between the first lens 11 and the second lens 13, and thus changing the adjustment effect of the first lens 11 and the second lens 13 on the diameter and divergence angle of the laser beam to meet different usage requirements. When the user rotates the first lens barrel 10 or the second lens barrel 12 to adjust the relative position of the first lens 11 and the second lens 13, the guide section 103 of the first lens barrel 10 and the guide mating section 123 of the second lens barrel 12 nest together to guide the movement of the first lens barrel 10 relative to the second lens barrel 12. This limits the movement of the first lens barrel 10 relative to the second lens barrel 12 to its own axis O. Since the first lens barrel 10 and the second lens barrel 12 are coaxially arranged, it can be ensured that the first lens barrel 10 and the second lens barrel 12 will not become out of axis due to the deviation of the movement direction during relative movement. This ensures that the first lens 11 and the second lens 13 can move stably along the axis O, thereby improving the stability and adjustment accuracy of the laser beam expander 100 during use.
[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A laser beam expander, characterized in that, include: The first lens barrel has a first inner cavity, and the first lens barrel includes a first connecting section and a guide section that are connected and coaxially arranged. A first lens is disposed in the first inner cavity; The second lens barrel is sleeved on one end of the first lens barrel and coaxially arranged with the first lens barrel. The second lens barrel has a second inner cavity that communicates with the first inner cavity. The second lens barrel includes a guide fitting section and a second connecting section that are connected and coaxially arranged. The second connecting section and the first connecting section are threadedly connected. The guide fitting section is sleeved on the outside of the guide section and the two fit together. as well as The second lens is disposed in the second inner cavity.
2. The laser beam expander as described in claim 1, characterized in that, The first connecting segment is located at the end of the guide segment away from the first lens; the guide mating segment is located at the end of the second connecting segment away from the second lens.
3. The laser beam expander as described in claim 2, characterized in that, The outer side wall of the first connecting section is provided with an external thread section, and the inner side wall of the second connecting section is provided with an internal thread section that is adapted to the external thread section.
4. The laser beam expander as described in claim 3, characterized in that, The length of the first connecting segment in its own axial direction is less than the length of the guide mating segment in its own axial direction.
5. The laser beam expander as described in claim 4, characterized in that, The inner diameter of the guide section is larger than the inner diameter of the second connecting section; the outer diameter of the guide section is larger than the outer diameter of the first connecting section.
6. The laser beam expander as described in claim 5, characterized in that, The end of the first connecting segment away from the guide segment has a chamfer.
7. The laser beam expander as described in claim 1, characterized in that, The first lens barrel also includes a limiting section, which is connected to the end of the guide section opposite to the first connecting section. The outer diameter of the limiting section is larger than the outer diameter of the guide section. A limiting plane is provided between the limiting section and the guide section. The limiting plane is used to abut against the guide mating section and prevent the first lens barrel from continuing to enter the second lens barrel.
8. The laser beam expander as described in claim 1, characterized in that, The inner wall of the first cavity is provided with a first step, and the first lens is embedded in the first step.
9. The laser beam expander as described in claim 1, characterized in that, The inner wall of the second cavity is provided with a second step, and the second lens is embedded in the second step.
10. The laser beam expander according to any one of claims 1 to 9, characterized in that, The second lens is a diverging lens, used to widen the divergence angle of the laser beam; the first lens is a collimating lens, used to collimate and correct the laser beam after it has passed through the second lens.