A lens assembly, an optical module, and an optical device

Abstract

This application discloses a lens assembly, an optical module, and an optical device. The lens assembly includes a first lens and a second lens. The first lens includes a first optical part and a first assembly part connected to each other. The first assembly part is disposed around the first optical part. The first assembly part has positioning slots, with at least two positioning slots spaced apart. The second lens includes a second optical part and a second assembly part connected to each other. The second assembly part is disposed around the second optical part. The second assembly part has positioning posts, with at least two positioning posts spaced apart. The positioning posts can be matched and inserted into the positioning slots one-to-one. When the positioning posts are connected to the positioning slots one-to-one, the first optical axis of the first optical part and the second optical axis of the second optical part are coaxially arranged.

Description

Technical Field

[0001] This application relates to the field of optical equipment technology, and more specifically, to a lens assembly, an optical module, and an optical device. Background Technology

[0002] In optical imaging systems, the precise alignment and assembly of multiple lenses is crucial for achieving excellent image quality. Traditionally, lens assembly, especially when aligning two or more independent lenses, typically relies on external optical measuring equipment (such as an optical measuring instrument, OMM) for auxiliary positioning. Specifically, existing technologies usually set optical identification marks (such as Fiducial marks) on the assembly parts (or skirts) of each lens. The center coordinates of these marks are acquired using an optical measuring instrument, and then the relative positions between the lenses are calculated and adjusted to ensure that the optical axes of each lens are coaxially aligned.

[0003] However, this assembly method relying on optical measuring instruments has obvious shortcomings: First, the method requires high-precision optical measuring equipment, which increases the equipment investment cost; second, the operation process requires complex processes such as mark recognition, coordinate acquisition and calculation, which makes the assembly process cumbersome and time-consuming, reducing production efficiency; third, the optical recognition process is easily affected by factors such as ambient light, lens contamination or mark processing errors, which introduce human operation errors or measurement errors, affecting the final assembly accuracy and consistency.

[0004] Therefore, there is an urgent need for a simpler, more reliable lens positioning and assembly solution that can reduce dependence on external equipment. Utility Model Content

[0005] One objective of this application is to provide a new technical solution for lens assemblies, optical modules, and optical devices.

[0006] According to a first aspect of this application, a lens assembly is provided, the lens assembly comprising: A first lens, comprising a first optical part and a first assembly part connected to each other, the first assembly part being disposed around the first optical part; the first assembly part having positioning grooves, at least two positioning grooves being spaced apart. The second lens includes a second optical part and a second assembly part connected to each other, the second assembly part being disposed around the second optical part; the second assembly part is provided with positioning posts, at least two of which are spaced apart. The positioning posts can be matched and inserted into the positioning slots one by one, and when the positioning posts and the positioning slots are connected in a one-to-one correspondence, the first optical axis of the first optical part and the second optical axis of the second optical part are coaxially arranged.

[0007] Optionally, the number of positioning slots and positioning posts is three; The three positioning slots are evenly distributed around the first optical axis, and the three positioning posts are evenly distributed around the second optical axis.

[0008] Optionally, the positioning groove extends axially along the first optical axis, and the positioning post extends axially along the second optical axis.

[0009] Optionally, along the axial direction of the first optical axis, the positioning groove includes a first mating section and a second mating section connected sequentially from the outside to the inside; and along the axial direction of the first optical axis, the inner diameter of the first mating section is uniformly arranged, and the inner diameter of the second mating section gradually decreases. Along the axial direction of the second optical axis, the positioning post includes a first post and a second post connected to each other, wherein the first post is connected to the second assembly part, and the second post is connected to the end of the first post away from the second assembly part; along the axial direction of the second optical axis, the diameter of the first post is uniformly arranged, and the diameter of the second post gradually decreases. The first column is matched and connected to the first mating segment, and the second column is matched and connected to the second mating segment.

[0010] Optionally, the length of the first mating section is greater than the length of the second mating section, and the length of the first column is greater than the length of the second column.

[0011] Optionally, the positioning groove can be reused as a dispensing groove, and the side wall of the positioning groove is provided with a vent hole for discharging gas from the adhesive.

[0012] Optionally, the first assembly part has a protruding stepped portion, and the positioning groove is formed at the position of the stepped portion; the vent hole is provided radially through the stepped portion.

[0013] Optionally, at least three exhaust holes are provided, and the at least three exhaust holes are evenly distributed.

[0014] According to a second aspect of this application, an optical module is provided, the optical module including a lens assembly as described in the first aspect.

[0015] According to a third aspect of this application, an optical device is provided, the optical device comprising an optical module as described in the second aspect.

[0016] The lens assembly provided in this application embodiment achieves autonomous positioning and assembly between the two lenses during the assembly of the first and second lenses, without relying on external optical measurement equipment, thus simplifying the assembly process and reducing equipment costs.

[0017] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0019] Figure 1 The diagram shown is a structural schematic of a lens assembly according to an embodiment of this application; Figure 2 The diagram shown is a schematic representation of the structure of the first lens in a lens assembly according to an embodiment of this application. Figure 3 The diagram shown is a partial structural illustration of the first lens in a lens assembly according to an embodiment of this application. Figure 1 ; Figure 4 The diagram shown is a partial structural illustration of the first lens in a lens assembly according to an embodiment of this application. Figure 2 ; Figure 5 The diagram shown is a schematic representation of the structure of the second lens in a lens assembly according to an embodiment of this application. Figure 6 The diagram shown is a partial structural schematic of the second lens in a lens assembly according to an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Lens assembly; 11. First lens; 111. First optical section; 112. First assembly section; 113. Step section; 110. Positioning groove; 1101. First mating section; 1102. Second mating section; 1100. Vent hole; 12. Second lens; 121. Second optical section; 122. Second assembly section; 120. Positioning post; 1201. First post; 1202. Second post. Detailed Implementation

[0021] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0024] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] Reference Figures 1-6 As shown, according to one embodiment of this application, a lens assembly 1 is provided. The lens assembly 1 includes a first lens 11 and a second lens 12. The first lens 11 includes a first optical part 111 and a first assembly part 112 connected to each other. The first assembly part 112 is disposed around the first optical part 111. The first assembly part 112 has a positioning groove 110, and at least two positioning grooves 110 are disposed at intervals. The second lens 12 includes a second optical part 121 and a second assembly part 122 connected to each other, the second assembly part 122 being disposed around the second optical part 121; the second assembly part 122 is provided with positioning posts 120, and at least two positioning posts 120 are disposed at intervals. The positioning posts 120 can be matched and inserted into the positioning slots 110 one by one, and when the positioning posts 120 and the positioning slots 110 are connected in a one-to-one correspondence, the first optical axis of the first optical part 111 and the second optical axis of the second optical part 121 are coaxially arranged.

[0027] In the lens assembly provided in this application embodiment, at least two positioning slots 110 are provided in the first assembly part 112 of the first lens 11, and at least two positioning posts 120 are provided in the second assembly part 122 of the second lens 12. The positioning posts 120 can be matched and inserted into the positioning slots 110 one-to-one. When the first assembly part 112 and the second assembly part 122 are connected correspondingly through the positioning slots 110 and the positioning posts 120, the first optical axis of the first optical part 111 and the second optical axis of the second optical part 121 are coaxially arranged. The lens assembly provided in this application embodiment achieves autonomous positioning and assembly between the two lenses during the assembly of the first lens 11 and the second lens 12, without relying on external optical measurement equipment. This simplifies the assembly process, reduces equipment costs, and improves assembly accuracy and consistency, ensuring optical imaging quality.

[0028] More specifically, the positioning slots 110 and positioning posts 120 in the lens assembly 1 are not merely visual recognition and markers serving as measurement references, but rather positioning structures capable of mechanical self-alignment and assembly functionality. During lens assembly, simply inserting the positioning posts one-to-one into the positioning slots achieves initial positioning of the first lens 11 and the second lens 12; this replaces the complex process of traditional mark recognition and coordinate calculation using optical measuring instruments, greatly simplifying the operation. Furthermore, this mechanical hard positioning method reduces human adjustment and measurement errors, ensuring stable and high-precision coaxial alignment in each assembly, improving product consistency and yield. Moreover, the at least two spaced positioning posts 120 and positioning slots 110 form a stable multi-point positioning system, effectively preventing lens rotation or displacement after assembly and ensuring the structural stability of the lens assembly in subsequent use.

[0029] More importantly, the assembly process of this lens assembly reduces reliance on expensive equipment, thereby saving costs; since the assembly process no longer requires high-precision optical measuring instruments, it can reduce equipment investment costs and subsequent maintenance costs on the production line.

[0030] Specifically, the positioning groove 110 is integrally formed on the first lens 11, and the positioning post 120 is integrally formed on the second lens 12.

[0031] Reference Figure 2 , Figure 5 As shown, in one embodiment, the number of positioning slots 110 and positioning posts 120 are both three; the three positioning slots 110 are evenly distributed around the first optical axis, and the three positioning posts 120 are evenly distributed around the second optical axis.

[0032] In this specific example, there are three positioning slots 110 and three positioning posts 120, which are evenly distributed around their respective optical axes. Compared with two positioning structures, three-point positioning can provide a more stable and accurate positioning effect, thereby restricting all degrees of freedom (translation and rotation) of the lens in the radial plane. At the same time, it avoids the over-positioning problem that may occur due to processing errors when using four or more points, which may lead to unsuccessful assembly or assembly stress. This further enhances the accuracy and stability of the assembly between the two lenses, ensures that the optical axes are strictly coaxial, and effectively reduces imaging deviation caused by assembly errors.

[0033] Reference Figure 2 , Figure 5 As shown, in one embodiment, the positioning groove 110 extends axially along the first optical axis, and the positioning post 120 extends axially along the second optical axis.

[0034] In this specific example, both the positioning groove 110 and the positioning post 120 extend axially along their respective optical axes. Thus, during assembly, the positioning post 120 can be smoothly inserted along the extension direction of the positioning groove 110, making the assembly process smoother. At the same time, the axially extended positioning structure can better ensure the positioning accuracy of the two lenses in the axial and radial directions, which is beneficial to the coaxial alignment of the optical axes.

[0035] Reference Figure 3 , Figure 4 , Figure 6 As shown, in one embodiment, along the axial direction of the first optical axis, the positioning groove 110 includes a first mating section 1101 and a second mating section 1102 connected sequentially from the outside to the inside; and along the axial direction of the first optical axis, the inner diameters of the first mating sections 1101 are equally distributed, while the inner diameters of the second mating sections 1102 gradually decrease. Specifically, the inner diameters of the second mating sections 1102 gradually decrease from the outside to the inside; specifically, from the outside to the inside means from the position near the opening of the positioning groove 110 to the position near the bottom of the positioning groove 110. Along the axial direction of the second optical axis, the positioning post 120 includes a first post 1201 and a second post 1202 connected to each other, wherein the first post 1201 is connected to the second assembly part 122, and the second post 1202 is connected to the end of the first post 1201 away from the second assembly part 122; along the axial direction of the second optical axis, the diameter of the first post 1201 is uniform, and the diameter of the second post 1202 gradually decreases; specifically, along the direction gradually away from the first post 1201, the diameter of the second post 1202 gradually decreases; The first column 1201 is matched and connected to the first mating section 1101, and the second column 1202 is matched and connected to the second mating section 1102.

[0036] In this specific example, the positioning groove 110 is divided into a first mating section 1101 and a second mating section 1102. The inner diameter of the first mating section 1101 is uniform along the axial direction, while the inner diameter of the second mating section 1102 gradually decreases from the outside to the inside along the axial direction. Correspondingly, the positioning post 120 is divided into a first post 1201 and a second post 1202. The diameter of the first post 1201 is uniform along the axial direction, while the diameter of the second post 1202 gradually decreases along the axial direction.

[0037] When the positioning post 120 is inserted into the positioning groove 110, the second post 1202 first enters the first mating section 1101. Since the second post 1202 has a tapered structure with a gradually changing diameter, it can provide initial guidance and positioning during assembly. Furthermore, the gradually changing diameter of the second post 1202 allows for quicker and easier assembly when it enters the first mating section 1101 with its uniform inner diameter. Finally, the first post 1201 is matched and connected to the first mating section 1101, and the second post 1202 is matched and connected to the second mating section 1102, thus providing final radial and angular constraints and ensuring a tight and secure assembly between the positioning post 120 and the positioning groove 110.

[0038] In one embodiment, the length of the first mating segment 1101 is greater than the length of the second mating segment 1102, and the length of the first column 1201 is greater than the length of the second column 1202.

[0039] In this specific example, the length of the first mating section 1101 is greater than the length of the second mating section 1102, and correspondingly, the length of the first column 1201 is greater than the length of the second column 1202. The longer first mating section 1101 and the first column 1201 can provide a more stable positioning effect during assembly, ensuring that the positioning column 120 will not easily shift in the positioning groove 110 after assembly, thus achieving higher reliability.

[0040] Reference Figure 3 , Figure 4 As shown, in one embodiment, the positioning groove 110 can be reused as a dispensing groove, and the side wall of the positioning groove 110 is provided with an exhaust hole 1100, which is used to discharge gas in the adhesive.

[0041] In this specific example, adhesive is applied to the positioning groove 110 to enhance the firmness of the connection between the positioning post 120 and the positioning groove 110. At the same time, an vent hole 1100 is opened on the side wall of the positioning groove 110 to discharge local gas in the adhesive during the bonding process, thereby balancing the flow of the adhesive, preventing assembly deviation, air bubbles or adhesive overflow contamination caused by gas retention, ensuring uniform filling of the adhesive, improving the bonding strength and assembly quality between the first lens 11 and the second lens 12, and further enhancing the stability of the lens assembly 1.

[0042] After the first lens 11 and the second lens 12 are positioned, pre-curing and final curing are performed to obtain a lens assembly 1 with high-precision optical axis alignment.

[0043] Reference Figure 3 , Figure 4As shown, in one embodiment, the first assembly part 112 protrudes and is provided with a stepped part 113, and the positioning groove 110 is formed at the position of the stepped part 113; the vent hole 1100 is provided radially through the stepped part 113.

[0044] In this specific example, a step portion 113 protrudes from the first assembly portion 112, and a positioning groove 110 is formed at the step portion 113, so that the exhaust hole 1100 can be radially connected through the step portion 113. This provides reasonable structural space for the positioning groove 110 and the exhaust hole 1100, making the exhaust path very short and direct, and the gas can be more easily and completely discharged, further optimizing the exhaust effect. At the same time, it facilitates the processing of the exhaust hole 1100, which is conducive to improving production efficiency and product quality.

[0045] In one embodiment, at least three exhaust holes 1100 are provided, and the at least three exhaust holes 1100 are evenly distributed.

[0046] In this specific example, at least three evenly distributed vent holes 1100 are provided to ensure that no matter which direction the adhesive is applied from or where air bubbles are generated, there are venting channels nearby. This allows for more effective exhaust of gas from the adhesive from multiple directions, achieving rapid and uniform venting, avoiding venting dead zones, further reducing the possibility of air bubble generation, ensuring that the adhesive is evenly distributed in the positioning groove, further improving the bonding effect between the first lens 11 and the second lens 12, and enhancing the structural stability and optical performance consistency of the entire lens assembly 1.

[0047] According to another embodiment of this application, an optical module is provided, the optical module including the lens assembly 1 as described above.

[0048] According to yet another embodiment of this application, an optical device is provided, the optical device including the optical module as described above.

[0049] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A lens assembly, characterized in that, The lens assembly includes: A first lens (11) includes a first optical part (111) and a first assembly part (112) connected to each other. The first assembly part (112) is arranged around the first optical part (111). The first assembly part (112) has a positioning groove (110), and at least two positioning grooves (110) are arranged at intervals. The second lens (12) includes a second optical part (121) and a second assembly part (122) connected to each other. The second assembly part (122) is arranged around the second optical part (121). The second assembly part (122) is provided with positioning posts (120), and at least two positioning posts (120) are arranged at intervals. The positioning posts (120) can be matched and inserted into the positioning slots (110) one by one. When the positioning posts (120) and the positioning slots (110) are connected in a one-to-one correspondence, the first optical axis of the first optical part (111) and the second optical axis of the second optical part (121) are coaxially arranged.

2. The lens assembly according to claim 1, characterized in that, The number of positioning slots (110) and positioning posts (120) are both three; The three positioning slots (110) are evenly distributed around the first optical axis, and the three positioning posts (120) are evenly distributed around the second optical axis.

3. The lens assembly according to claim 1 or 2, characterized in that, The positioning groove (110) extends axially along the first optical axis, and the positioning post (120) extends axially along the second optical axis.

4. The lens assembly according to claim 3, characterized in that, Along the axial direction of the first optical axis, the positioning groove (110) includes a first mating section (1101) and a second mating section (1102) connected sequentially from the outside to the inside; and along the axial direction of the first optical axis, the inner diameter of the first mating section (1101) is uniformly arranged, and the inner diameter of the second mating section (1102) gradually decreases. Along the axial direction of the second optical axis, the positioning post (120) includes a first post (1201) and a second post (1202) connected to each other, wherein the first post (1201) is connected to the second assembly part (122), and the second post (1202) is connected to the end of the first post (1201) away from the second assembly part (122); along the axial direction of the second optical axis, the diameter of the first post (1201) is uniform, and the diameter of the second post (1202) gradually decreases; The first column (1201) is matched and connected to the first mating section (1101), and the second column (1202) is matched and connected to the second mating section (1102).

5. The lens assembly according to claim 4, characterized in that, The length of the first mating section (1101) is greater than the length of the second mating section (1102), and the length of the first column (1201) is greater than the length of the second column (1202).

6. The lens assembly according to claim 1 or 2, characterized in that, The positioning groove (110) can be reused as a dispensing groove. The side wall of the positioning groove (110) is provided with an exhaust hole (1100) for discharging gas from the adhesive.

7. The lens assembly according to claim 6, characterized in that, The first assembly part (112) has a protruding step part (113), and the positioning groove (110) is opened at the position of the step part (113); the exhaust hole (1100) is provided radially through the step part (113).

8. The lens assembly according to claim 6, characterized in that, At least three exhaust holes (1100) are provided, and the at least three exhaust holes (1100) are evenly distributed.

9. An optical module, characterized in that, The optical module includes a lens assembly (1) as described in any one of claims 1-8.

10. An optical device, characterized in that, The optical device includes the optical module as described in claim 9.

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