Gluing lens group and optical lens

Abstract

The utility model provides a balsaming lens group and an optical lens, the balsaming lens group comprises a first lens with a first joint structure and a second lens with a second joint structure, the first joint structure is jointed with the second joint structure, and a first optical effective part and a second optical effective part are arranged oppositely. Glue is arranged between the first optical effective part and the second optical effective part; the first joint structure sequentially comprises a first gap part, a first conical surface part, a second conical surface part and a first bearing surface from the first optical effective part; and the second joint structure sequentially comprises a second gap part corresponding to the first gap part, a fourth conical surface part corresponding to the first conical surface part, a first cambered surface part corresponding to the second conical surface part and a second bearing surface in contact with the first bearing surface from the second optical effective part. According to the utility model, the problem of assembly eccentricity caused by a large lens gluing structure can be improved, the installation is also convenient, and the assembly yield is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cemented lens groups, in particular to a cemented lens group and an optical lens. Background Art

[0002] A cemented lens group is an optical component composed of two or more lenses through a specific cementing process. It can effectively correct aberrations and improve imaging quality, and is widely used in various optical instruments and equipment.

[0003] In the current market, in addition to the growing demand for large-aperture plastic laminated lenses in VR products, traditional optical devices such as digital cameras, telescopes, and microscopes also rely heavily on laminated lens assemblies to achieve precise imaging. For example, in high-end digital cameras, laminated lens assemblies can help achieve clearer images, accurately reproducing the details and colors of the scene. In astronomical telescopes, they are also crucial for observing distant celestial bodies and obtaining clear images.

[0004] Plastic lens bonding is a critical step in the production of a composite lens assembly. This process involves tightly bonding two or more lenses together according to design requirements. However, this isn't a simple physical splicing process; it requires ensuring the precise alignment of the optical centers of each lens during bonding. Poor centering during bonding can lead to improper eccentricity in the bonded component, compromising overall image quality. Therefore, improving this problem through structural adjustments is a key research area for lens designers. Utility Model Content

[0005] The purpose of the utility model is to provide a cemented lens assembly and an optical lens, which can improve the assembly eccentricity problem caused by the cemented structure of large lenses and improve the assembly yield.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a cemented lens assembly, which is annular and includes:

[0007] A first lens comprises a first bonding surface, wherein the first bonding surface comprises a first optically effective portion and a plurality of first bonding structures surrounding the first optically effective portion, wherein the plurality of first bonding structures are arranged at intervals;

[0008] A second lens includes a second bonding surface, wherein the second bonding surface includes: a second optically effective portion corresponding to the first optically effective portion and a plurality of second bonding structures surrounding the second optically effective portion, wherein the plurality of second bonding structures are arranged at intervals;

[0009] The first bonding structure is bonded to the second bonding structure, the first optically effective portion is arranged opposite to the second optically effective portion, and glue is provided between the first optically effective portion and the second optically effective portion;

[0010] The first bonding structure includes, starting from the first optically effective portion, a first gap portion, a first conical portion, a second conical portion and a first bearing surface in sequence;

[0011] The second bonding structure starts from the second optically effective part and includes, in sequence, a second gap portion corresponding to the first gap portion, a fourth conical portion corresponding to the first conical portion, a first arc portion corresponding to the second conical portion, and a second bearing surface in contact with the first bearing surface.

[0012] According to a technical solution of the present invention, the first joining structure further includes a third conical surface portion away from the first optically effective portion and connected to the first bearing surface.

[0013] According to a technical solution of the present invention, with the direction of the optical axis of the cemented lens group as the horizontal direction, the angle A between the first conical surface portion and the horizontal direction and the angle B between the fourth conical surface portion and the horizontal direction satisfy the following relationship:

[0014] 10°≤A=B≤40°.

[0015] According to a technical solution of the present invention, with the direction of the optical axis of the cemented lens group as the horizontal direction, the angle A between the first conical surface portion and the horizontal direction and the angle L between the second conical surface portion and the horizontal direction satisfy the following relationship:

[0016] A<L≤90°.

[0017] According to a technical solution of the present invention, the gap C between the first conical surface portion and the fourth conical surface portion satisfies the following relationship:

[0018] 0mm≤C≤0.29mm.

[0019] According to a technical solution of the present utility model, the length D of the first bearing surface and the second bearing surface in contact with each other satisfies the following relationship:

[0020] 0.40mm≤D≤1.15mm.

[0021] According to a technical solution of the present invention, the length E of the first conical portion and the fourth conical portion corresponding to each other satisfies the following relationship:

[0022] 0.38mm≤E≤0.99mm.

[0023] According to a technical solution of the present invention, the gap size G between the first gap portion and the second gap portion satisfies the following relationship:

[0024] 0.24mm≤G≤0.40mm.

[0025] According to a technical solution of the present invention, the plurality of first joining structures and the plurality of second joining structures are arranged at even intervals.

[0026] According to a technical solution of the present invention, the interval I between two adjacent first bonding structures or two adjacent second bonding structures satisfies the following relationship:

[0027] 60°≤I≤120°.

[0028] According to one aspect of the present invention, an optical lens is provided, comprising:

[0029] lens barrel;

[0030] A plurality of lenses and at least one cemented lens group as described in any one of the above technical solutions are arranged in intervals in the lens barrel.

[0031] According to a technical solution of the present utility model, the radial gap F between the first lens and the lens barrel satisfies the following relationship:

[0032] 0.10mm≤F≤0.45mm.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] According to one concept of the present invention, a glued lens group and an optical lens are proposed. By arranging a first bonding structure and a second bonding structure that adapt to each other on two lenses that need to be glued, the corresponding two structural side walls cooperate with each other to achieve a snap-fit ​​effect, thereby realizing mutual limitation of the first lens and the second lens, which can effectively improve the assembly eccentricity problem caused by the glued structure and is conducive to improving assembly efficiency.

[0035] In the present invention, the corresponding multiple first bonding structures and second bonding structures are arranged at intervals. Therefore, there is a gap between two adjacent first bonding structures or two adjacent second bonding structures. When two lenses are glued together, the gap helps to drain the glue to prevent excessive glue from being unable to be discharged, resulting in the two lenses being unable to align, and then causing the bonding thickness to exceed the upper limit, resulting in a decrease in the resolution of the lens product. At the same time, it also helps to eliminate the escape of glue between the lenses.

[0036] In the present invention, the first conical surface portion cooperates with the fourth conical surface portion to complete the limiting of the first joining structure and the second joining structure, and the second conical surface portion cooperates with the corresponding first arc surface portion, so that during the assembly process of the first lens and the second lens, there is no need to fit all the structural surfaces of the first joining structure and the second joining structure tightly, avoiding damage to the lenses caused by tight assembly, which helps to improve assembly efficiency, and a gap is also formed between the second conical surface portion and the first arc surface portion. The gap has the function of assisting glue overflow and air escape, thereby improving the yield rate of the glued lens group.

[0037] Furthermore, based on the fact that the present invention can provide a more stable cemented lens group, the lens including the cemented lens group also has better stability, which can avoid performance abnormalities and stray light ghost image risks caused by assembly instability; reduce the risk of lens tilt in mechanical and environmental testing reliability experiments, and improve lens quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic cross-sectional view of an optical lens configured with a cemented lens group according to one embodiment of the present invention is shown;

[0040] Figure 2 A schematic diagram of a cemented lens assembly with irregular triangular grooves according to Example 1 of one embodiment of the present invention is shown;

[0041] Figure 3 A schematic diagram schematically illustrates a cross-sectional view of an optical lens configured with a cemented lens group according to an embodiment of the present invention;

[0042] Figure 4 A schematic diagram schematically showing a marking of a cemented lens assembly according to an embodiment of the present utility model;

[0043] Figure 5 Another identification diagram schematically shows a cemented lens assembly according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] 100, first lens; 101, first optically effective portion; 102, first bonding structure;

[0046] 1021, first gap portion; 1022, first conical portion; 1023, second conical portion; 1024, first supporting surface; 1025, third conical portion;

[0047] 200, second lens; 201, second optically effective portion; 202, second bonding structure;

[0048] 2021. Second gap portion; 2022. Fourth conical portion; 2023. First arcuate portion; 2024. Second supporting surface. DETAILED DESCRIPTION

[0049] The description of the embodiments in this specification should be combined with the corresponding drawings, which should be considered a complete part of this specification. In the drawings, the shapes and thicknesses of the embodiments may be exaggerated and indicated for simplicity or convenience. Furthermore, the various structural components in the drawings will be described separately. It is worth noting that components not shown in the drawings or not described in words are known to those of ordinary skill in the art.

[0050] The description of the embodiments herein and any references to directions and orientations are for ease of description only and are not to be construed as limiting the scope of protection of the present invention. The following description of the preferred embodiments may involve combinations of features, which may exist independently or in combination. The present invention is not specifically limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0051] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0052] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0053] like Figures 1 to 5 As shown, according to one embodiment of the present invention, the present invention provides a cemented lens assembly, comprising:

[0054] The first lens 100 includes a first bonding surface, wherein the first bonding surface includes a first optically effective portion 101 and a plurality of first bonding structures 102 surrounding the first optically effective portion 101, wherein the plurality of first bonding structures 102 are arranged at intervals;

[0055] The second lens 200 includes a second bonding surface, wherein the second bonding surface includes: a second optically effective portion 201 corresponding to the first optically effective portion 101 and a plurality of second bonding structures 202 surrounding the second optically effective portion 201, wherein the plurality of second bonding structures 202 are arranged at intervals;

[0056] The first bonding structure 102 is bonded to the second bonding structure 202 , the first optically effective portion 101 and the second optically effective portion 201 are arranged opposite to each other, and glue is provided between the first optically effective portion 101 and the second optically effective portion 201 ;

[0057] The first bonding structure 102 includes, starting from the first optically effective portion 101 , a first gap portion 1021 , a first conical portion 1022 , a second conical portion 1023 and a first bearing surface 1024 ;

[0058] The second joining structure 202 starts from the second optically effective part 201 and sequentially includes a second gap portion 2021 corresponding to the first gap portion 1021, a fourth conical portion 2022 corresponding to the first conical portion 1022, a first arc portion 2023 corresponding to the second conical portion 1023, and a second supporting surface 2024 in contact with the first supporting surface 1024.

[0059] By providing a first bonding structure and a second bonding structure that match each other on the two lenses that need to be glued, the corresponding two structural side walls cooperate with each other to achieve a snap-fit ​​effect, thereby realizing mutual limitation of the first lens 100 and the second lens 200, which can effectively improve the assembly eccentricity problem caused by the glued structure and is conducive to improving assembly efficiency.

[0060] Furthermore, the corresponding multiple first bonding structures 102 and second bonding structures 202 are arranged at intervals. Therefore, there is a gap between two adjacent first bonding structures 102 or two adjacent second bonding structures 202. When the two lenses are glued together, the gap helps to drain the glue to prevent excessive glue from being unable to be discharged, resulting in the two lenses being unable to align, and then causing the bonding thickness to exceed the upper limit, resulting in a decrease in the resolution of the lens product. At the same time, it also helps to eliminate the escape of glue between the lenses.

[0061] At the same time, the first conical surface portion 1022 cooperates with the fourth conical surface portion 2022 to complete the limiting of the first joining structure 102 and the second joining structure 202, and the second conical surface portion 1023 cooperates with the corresponding first arc surface portion 2023, so that during the assembly of the first lens 100 and the second lens 200, there is no need to fit all the structural surfaces of the first joining structure 102 and the second joining structure 202 tightly, avoiding damage to the lenses caused by tight assembly, which helps to improve assembly efficiency, and a gap will also be formed between the second conical surface portion 1023 and the first arc surface portion 2023. This gap has the function of assisting glue overflow and air escape, thereby improving the yield rate of the glued lens group.

[0062] It is understandable that the above structure of the present invention is also applicable to the case where three or more cemented lenses are assembled and adapted.

[0063] In some embodiments of the present invention, the first joining structure 102 further includes a third conical portion 1025 that is away from the first optically effective portion 101 and connected to the first supporting surface 1024. By providing the third conical portion 1025, the first lens 100 and the second lens 200 are supported and assembled only through the first supporting surface 1024 and the second supporting surface 2024, thereby reducing the contact adaptation size of the supporting surfaces and making the positioning accuracy and assembly accuracy easier to control.

[0064] With the optical axis of the cemented lens assembly as the horizontal direction, the angle A between the first conical surface portion 1022 and the horizontal direction and the angle B between the fourth conical surface portion 2022 and the horizontal direction satisfy the following relationship: 10° ≤ A = B ≤ 40°. When this relationship is satisfied, the angles of the joint structure between the two lenses making up the cemented lens assembly are consistent, improving assembly stability.

[0065] With the optical axis of the cemented lens assembly as the horizontal direction, the angle A between the first conical surface portion 1022 and the horizontal direction and the angle L between the second conical surface portion 1023 and the horizontal direction satisfy the following relationship: A < L ≤ 90°. When L < 90°, this facilitates the formation of a gap between the second conical surface portion 1023 and the first curved surface portion 2023. When L = 90°, this not only facilitates the formation of a gap between the second conical surface portion 1023 and the first curved surface portion 2023, but also increases the size of the supporting surface, improving assembly stability. The notation for L is similar to that for methods A and B.

[0066] The gap C between the first conical surface portion 1022 and the fourth conical surface portion 2022 satisfies the following relationship: 0 mm ≤ C ≤ 0.29 mm. When the above relationship is satisfied, the relative displacement of the two lenses can be limited to within a certain range, thereby facilitating mutual positioning between the lenses.

[0067] The contact length D between the first supporting surface 1024 and the second supporting surface 2024 satisfies the following relationship: 0.40 mm ≤ D ≤ 1.15 mm. When the above relationship is satisfied, the supporting length between the two lenses is limited, thereby improving assembly stability.

[0068] Furthermore, the length E of the first conical surface portion 1022 and the fourth conical surface portion 2022 corresponding to each other satisfies the following relationship: 0.38 mm ≤ E ≤ 0.99 mm. When the above relationship is satisfied, the assembly stability is improved by limiting the length of the sidewalls between the two lenses.

[0069] The gap size G between the first gap portion 1021 and the second gap portion 2021 satisfies the following relationship: 0.24 mm ≤ G ≤ 0.40 mm. When the above relationship is satisfied, by limiting the gap size between the two lenses, air can pass through when the two lenses are glued together, and some overflow glue can be absorbed.

[0070] In some embodiments of the present invention, the plurality of first joining structures 102 and the second joining structures 202 are evenly spaced. The number of the first joining structures 102 and the number of the second joining structures 202 are equal, and the number is at least two.

[0071] The spacing I between two adjacent first bonding structures 102 or two adjacent second bonding structures 202 satisfies the following relationship: 60° ≤ I ≤ 120°. The spacing here refers to the angle of the gap across the entire circumference. The gap between two adjacent first bonding structures 102 corresponds to the spacing H between two adjacent gaps that satisfies the following relationship: 30° ≤ H ≤ 60°. When this relationship is met, a sufficient retaining angle is ensured between the first lens 100 and the second lens 200, thereby improving assembly yield and ensuring the air escape function of the gap.

[0072] According to one aspect of the present invention, an optical lens is provided, comprising:

[0073] lens barrel;

[0074] A plurality of lenses and at least one cemented lens group as described in any one of the above technical solutions are arranged in intervals in the lens barrel.

[0075] In some embodiments of the present invention, the radial gap F between the first lens 100 and the lens barrel satisfies the following relationship: 0.10 mm ≤ F ≤ 0.45 mm. When the above relationship is met, the matching length of the first lens 100 and the lens barrel 300 can be guaranteed, avoiding interference with the lens barrel 300 during assembly.

[0076] As shown in Table 1 and Figures 3 to 5As shown in the figure, three embodiments of the cemented lens group and the optical lens composed of the cemented lens group of the present invention are listed.

[0077] Example / Parameters A(°) B(°) C(mm) D(mm) E(mm) F(mm) G(mm) H(°) I(°) Example 1 20 20 0.05 0.50 0.38 0.10 0.34 40 80 Example 2 10 10 0 0.40 0.75 0.35 0.24 60 120 Example 3 40 40 0.29 1.15 0.99 0.45 0.40 30 60

[0078] Table 1

[0079] In the first embodiment, Figure 3 As shown, three first bonding structures 102 or second bonding structures 202 are used, and the corresponding interval angle is set to 80°; in the second embodiment, as shown in FIG. Figure 4 As shown, two first bonding structures 102 or two second bonding structures 202 are used, and the corresponding interval angle is set to 120°; in the third embodiment, as shown in FIG. Figure 5 As shown, four first engaging structures 102 or second engaging structures 202 are used, and the corresponding interval angle is set to 60°.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cemented lens assembly, characterized in that: include: A first lens (100) comprises a first bonding surface, wherein the first bonding surface comprises: a first optically effective portion (101) and a plurality of first bonding structures (102) surrounding the first optically effective portion (101), wherein the plurality of first bonding structures (102) are arranged at intervals; A second lens (200) comprises a second bonding surface, wherein the second bonding surface comprises: a second optically effective portion (201) corresponding to the first optically effective portion (101) and a plurality of second bonding structures (202) surrounding the second optically effective portion (201), wherein the plurality of second bonding structures (202) are arranged at intervals; The first joining structure (102) is joined to the second joining structure (202), the first optically effective portion (101) and the second optically effective portion (201) are arranged opposite each other, and glue is provided between the first optically effective portion (101) and the second optically effective portion (201); The first joining structure (102) starts from the first optically effective portion (101) and sequentially comprises a first gap portion (1021), a first conical portion (1022), a second conical portion (1023) and a first bearing surface (1024); The second joining structure (202) starts from the second optically effective part (201) and includes, in sequence, a second gap portion (2021) corresponding to the first gap portion (1021), a fourth conical portion (2022) corresponding to the first conical portion (1022), a first arc portion (2023) corresponding to the second conical portion (1023), and a second bearing surface (2024) in contact with the first bearing surface (1024).

2. The cemented lens assembly according to claim 1, wherein: The first joining structure (102) further comprises a third conical surface portion (1025) which is away from the first optically effective portion (101) and connected to the first bearing surface (1024).

3. The cemented lens assembly according to claim 1, wherein: Taking the direction of the optical axis of the cemented lens group as the horizontal direction, the angle A between the first conical surface portion (1022) and the horizontal direction, and the angle B between the fourth conical surface portion (2022) and the horizontal direction satisfy the following relationship: 10°≤A=B≤40°.

4. The cemented lens assembly according to claim 1, wherein: Taking the direction of the optical axis of the cemented lens group as the horizontal direction, the angle A between the first conical surface portion (1022) and the horizontal direction, and the angle L between the second conical surface portion (1023) and the horizontal direction satisfy the following relationship: A<L≤90°.

5. The cemented lens assembly according to claim 1, wherein: The gap C between the first conical surface portion (1022) and the fourth conical surface portion (2022) satisfies the following relationship: 0mm≤C≤0.29mm.

6. The cemented lens assembly according to claim 1, wherein: The length D of the first supporting surface (1024) and the second supporting surface (2024) in contact with each other satisfies the following relationship: 0.40mm≤D≤1.15mm.

7. The cemented lens assembly according to claim 1, wherein: The length E of the first conical surface portion (1022) and the fourth conical surface portion (2022) corresponding to each other satisfies the following relationship: 0.38mm≤E≤0.99mm.

8. The cemented lens assembly according to claim 1, wherein: The gap size G between the first gap portion (1021) and the second gap portion (2021) satisfies the following relationship: 0.24mm≤G≤0.40mm.

9. The cemented lens assembly according to claim 1, wherein: The plurality of first joining structures (102) and the plurality of second joining structures (202) are arranged at even intervals.

10. The cemented lens assembly according to claim 9, characterized in that: The interval I between two adjacent first joining structures (102) or two adjacent second joining structures (202) satisfies the following relationship: 60°≤I≤120°。 11. An optical lens, characterized in that: include: lens barrel; A plurality of lenses and at least one cemented lens group according to any one of claims 1 to 10 are arranged in intervals within the lens barrel.

12. The optical lens according to claim 11, wherein: The radial gap F between the first lens (100) and the lens barrel satisfies the following relationship: 0.10mm≤F≤0.45mm.

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