An adhesive lens structure and optical lens

Abstract

The present application relates to the technical field of optical elements, and discloses a bonded lens structure and an optical lens. The bonded lens structure comprises a first lens and a second lens bonded by glue, a bonding surface of the first lens is sequentially provided with an aspherical convex, an annular horizontal groove and a first annular horizontal surface in an outward peripheral direction from a geometric center position, a bonding surface of the second lens is sequentially provided with an aspherical groove for cooperating with the aspherical convex, an annular horizontal boss for cooperating with the annular horizontal groove and a second annular horizontal surface for cooperating with the first annular horizontal surface in an outward peripheral direction from the geometric center position, a side of the annular horizontal groove away from the aspherical convex is provided with a first annular inclined surface, and a side of the annular horizontal boss away from the aspherical groove is provided with a second annular inclined surface for cooperating with the first annular inclined surface. The bonded lens structure can avoid lens bonding eccentricity, effectively improve the yield of the bonded lens structure, and thus improve the optical performance of the entire optical lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical elements, in particular to a bonded lens structure and an optical lens. BACKGROUND

[0002] In order to correct the aberration and chromatic aberration of the optical lens, the optical system usually uses bonded lenses to solve this problem. The bonded lenses are bonded together by two lenses made of different materials, which correct the aberration and chromatic aberration of the optical system. At present, the bonding technology of glass lenses is widely used, but the bonded glass lenses have the problems of high cost and cannot meet the requirements of some optical systems. Therefore, plastic aspherical bonded lens technology is also used to avoid the above problems caused by the application of bonded glass lenses. However, the bonded plastic aspherical lens has high requirements on the bonding process precision, and the current bonding process generally has the problem of poor lens bonding eccentricity, which affects the resolution of the optical lens, and it is difficult to ensure stable and high product yield.

[0003] Therefore, there is an urgent need for a bonded lens structure and an optical lens to solve the above technical problems. SUMMARY

[0004] Based on the above, the purpose of the present application is to provide a bonded lens structure and an optical lens, which can avoid lens bonding eccentricity, effectively improve the yield of the bonded lens structure, and improve the optical performance of the entire optical lens.

[0005] To achieve the above purpose, the present application adopts the following technical scheme:

[0006] In a first aspect, a bonded lens structure is provided, comprising a first lens and a second lens, the first lens and the second lens being bonded by glue, the bonding surface of the first lens being sequentially provided with an aspherical convex, an annular horizontal groove and a first annular horizontal surface along the geometric center position to the outer peripheral direction, the bonding surface of the second lens being sequentially provided with an aspherical groove for cooperating with the aspherical convex, an annular horizontal boss for cooperating with the annular horizontal groove and a second annular horizontal surface for cooperating with the first annular horizontal surface along the geometric center position to the outer peripheral direction, the side of the annular horizontal groove away from the aspherical convex being provided with a first annular inclined surface, and the side of the annular horizontal boss away from the aspherical groove being provided with a second annular inclined surface cooperating with the first annular inclined surface.

[0007] As an optional solution of the bonded lens structure, an annular convex corner structure is provided between the annular horizontal groove and the first annular horizontal surface, and an annular concave corner structure cooperating with the annular convex corner structure is provided between the annular horizontal boss and the second annular horizontal surface.

[0008] As an optional solution of the bonded lens structure, the annular convex corner structure comprises a first annular outer convex arc surface, a third annular bevel, a fourth annular bevel and a second annular outer convex arc surface arranged in sequence from the periphery of the first lens to the geometric center.

[0009] As an optional solution of the bonded lens structure, an outer angle between the third annular bevel and the fourth annular bevel is less than 180 degrees, and a first gap is formed between the annular convex corner structure and the annular concave corner structure when the first lens and the second lens are matched.

[0010] As an optional solution of the bonded lens structure, the first annular horizontal surface is supported on the second annular horizontal surface, and a second gap is formed between the bottom surface of the annular horizontal groove and the top surface of the annular horizontal boss when the first lens and the second lens are matched.

[0011] As an optional solution of the bonded lens structure, the asphericity coefficient of the aspheric convex is the same as the asphericity coefficient of the aspheric concave.

[0012] As an optional solution of the bonded lens structure, the first lens and the second lens are made of plastic material.

[0013] As an optional solution of the bonded lens structure, the glue is light-heat curing glue.

[0014] As an optional solution of the bonded lens structure, the wavelength range of the curing spectrum of the glue is 300 nm to 600 nm.

[0015] In a second aspect, an optical lens is provided, comprising the bonded lens structure as described above.

[0016] The present application has the following beneficial effects:

[0017] The bonded lens structure provided by the present application comprises a first lens and a second lens bonded by glue. During the bonding process of the glue, the first lens is placed above the second lens, the aspheric convex is matched with the aspheric concave, the annular horizontal groove is matched with the annular horizontal boss, the first annular horizontal surface is matched with the second annular horizontal surface, and the first annular bevel is supported on the second annular bevel, thereby playing a role of assembly guide and limiting. The eccentric misalignment of the first lens and the second lens during bonding is avoided, the yield of the bonded lens structure is effectively improved, and the optical performance of the entire optical lens is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on the contents of the embodiments of the present application and the drawings without any creative effort.

[0019] Figure 1 is a structural schematic diagram of the adhesive lens structure provided by the present application;

[0020] Figure 2 is a structural schematic diagram of the first lens provided by the present application;

[0021] Figure 3 is a structural schematic diagram of the second lens provided by the present application; Figure 2 is an enlarged schematic diagram of the region A in the figure;

[0022] Figure 4 is a structural schematic diagram of the second lens provided by the present application;

[0023] In the figure:

[0024] 1, the first lens; 11, the aspherical convex protrusion; 12, the annular horizontal groove; 13, the first annular horizontal surface; 14, the first annular inclined surface; 15, the annular convex corner structure; 151, the first annular outer convex arc surface; 152, the third annular inclined surface; 153, the fourth annular inclined surface; 154, the second annular outer convex arc surface;

[0025] 2, the second lens; 21, the aspherical concave groove; 22, the annular horizontal boss; 23, the second annular horizontal surface; 24, the second annular inclined surface; 25, the annular concave corner structure;

[0026] 3, the first gap; 4, the second gap. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0028] The present embodiment provides an optical lens, which comprises a lens body and an adhesive lens structure, such as Figures 1-4As shown, the bonded lens structure comprises a first lens 1 and a second lens 2, the first lens 1 and the second lens 2 are bonded by glue, the bonding surface of the first lens 1 is sequentially provided with an aspherical convex 11, an annular horizontal groove 12 and a first annular horizontal surface 13 along the outward peripheral direction from the geometric center position, the bonding surface of the second lens 2 is sequentially provided with an aspherical concave 21 for cooperating with the aspherical convex 11, an annular horizontal boss 22 for cooperating with the annular horizontal groove 12 and a second annular horizontal surface 23 for cooperating with the first annular horizontal surface 13 along the outward peripheral direction from the geometric center position, the side of the annular horizontal groove 12 away from the aspherical convex 11 is provided with a first annular inclined surface 14, the side of the annular horizontal boss 22 away from the aspherical concave 21 is provided with a second annular inclined surface 24 cooperating with the first annular inclined surface 14, and the first annular inclined surface 14 and the second annular inclined surface 24 are mutually supported by tolerance control.

[0029] Specifically, in the process of bonding by glue, the first lens 1 is placed above the second lens 2, the aspherical convex 11 cooperates with the aspherical concave 21, the annular horizontal groove 12 cooperates with the annular horizontal boss 22, the first annular horizontal surface 13 cooperates with the second annular horizontal surface 23 one by one, and the first annular inclined surface 14 is supported on the second annular inclined surface 24, which plays a role of assembly guide and limiting, avoids eccentric misalignment when the first lens 1 and the second lens 2 are bonded, effectively improves the yield of the bonded lens structure, and thus improves the optical performance of the entire optical lens.

[0030] Optionally, the annular horizontal groove 12 and the first annular horizontal surface 13 are provided with an annular convex corner structure 15, and the annular horizontal boss 22 and the second annular horizontal surface 23 are provided with an annular concave corner structure 25 cooperating with the annular convex corner structure 15. Specifically, the annular convex corner structure 15 comprises a first annular outer convex arc surface 151, a third annular inclined surface 152, a fourth annular inclined surface 153 and a second annular outer convex arc surface 154 arranged in sequence from the periphery of the first lens 1 to the geometric center, that is, the annular convex corner structure 15 is transitionally connected with the first annular horizontal surface 13 through the first annular outer convex arc surface 151, and is transitionally connected with the annular horizontal groove 12 through the second annular outer convex arc surface 154. The first annular outer convex arc surface 151 can avoid the occurrence of sharp corner collision between the first annular horizontal surface 13 and the second annular horizontal surface 23, and the second annular outer convex arc surface 154 can avoid the occurrence of sharp corner collision between the first annular inclined surface 14 and the second annular inclined surface 24, so as to avoid the first lens 1 or the second lens 2 being scratched or damaged by the sharp corner, and improve the processing fault tolerance and yield of the bonded lens structure.

[0031] Further, the outer angle between the third annular bevel 152 and the fourth annular bevel 153 is less than 180 degrees, so that when the first lens 1 and the second lens 2 are matched for bonding, the first gap 3 is formed between the annular convex corner structure 15 and the annular concave corner structure 25. Specifically, during the process of glue bonding, overflow of glue is inevitable, and if the glue overflows to the outer edge of the lens, the matching between the outer edge of the lens and the frame will be affected, thereby affecting the overall assembly quality. The first gap 3 can accommodate excess glue, reduce the possibility of glue overflow, and to some extent, reduce the precision requirement of glue dispensing amount of the gluing machine in the gluing process, which is beneficial to control the production cost.

[0032] Optionally, when the first lens 1 and the second lens 2 are matched for bonding, the first annular horizontal plane 13 is supported on the second annular horizontal plane 23, and the bottom surface of the annular horizontal groove 12 and the top surface of the annular horizontal boss 22 form the second gap 4. Specifically, by tolerance control, the first annular horizontal plane 13 is supported on the second annular horizontal plane 23, which can ensure the formation of the second gap 4. The second gap 4 can accommodate excess glue during bonding, reduce the possibility of glue overflow, and to some extent, reduce the precision requirement of glue dispensing amount of the gluing machine in the gluing process, which is beneficial to control the production cost.

[0033] Optionally, the aspherical surface coefficient of the aspherical surface protrusion 11 is the same as the aspherical surface coefficient of the aspherical surface groove 21.

[0034] Optionally, the first lens 1 and the second lens 2 are both made of plastic material, which has high light transmittance and impact resistance.

[0035] Preferably, the glue is a photo-thermal curing glue, which is cured and bonded under the irradiation of ultraviolet light. In the embodiment, the wavelength range of the curing spectrum of the glue that can be cured is 300nm to 600nm.

[0036] Note that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A bonding lens structure, characterized in that, The device includes a first lens (1) and a second lens (2), which are bonded together with adhesive. The bonding surface of the first lens (1) is provided with an aspherical protrusion (11), an annular horizontal groove (12) and a first annular horizontal surface (13) in sequence from the geometric center to the outer periphery. The bonding surface of the second lens (2) is provided with an aspherical groove (21) for cooperating with the aspherical protrusion (11), an annular horizontal boss (22) for cooperating with the annular horizontal groove (12) and a second annular horizontal surface (23) for cooperating with the first annular horizontal surface (13) in sequence from the geometric center to the outer periphery. The annular horizontal groove (12) has a first annular inclined surface (14) on the side away from the aspherical protrusion (11), and the annular horizontal boss (22) has a second annular inclined surface (24) for cooperating with the first annular inclined surface (14) on the side away from the aspherical groove (21). An annular convex corner structure (15) is provided between the annular horizontal groove (12) and the first annular horizontal surface (13), and an annular concave corner structure (25) that cooperates with the annular convex corner structure (15) is provided between the annular horizontal boss (22) and the second annular horizontal surface (23). The annular convex corner structure (15) includes a first annular convex arc surface (151), a third annular inclined surface (152), a fourth annular inclined surface (153), and a second annular convex arc surface (154) arranged sequentially from the periphery of the first lens (1) toward the geometric center. The outer angle between the third annular inclined plane (152) and the fourth annular inclined plane (153) is less than 180 degrees. When the first lens (1) and the second lens (2) are in contact, a first gap (3) is formed between the annular convex corner structure (15) and the annular concave corner structure (25). The aspherical coefficient of the aspherical protrusion (11) is the same as that of the aspherical groove (21).

2. The adhesive lens structure according to claim 1, characterized in that, When the first lens (1) and the second lens (2) are engaged, the first annular horizontal surface (13) rests on the second annular horizontal surface (23), and a second gap (4) is formed between the bottom surface of the annular horizontal groove (12) and the top surface of the annular horizontal boss (22).

3. The adhesive lens structure according to claim 1, characterized in that, The first lens (1) and the second lens (2) are made of plastic material.

4. The adhesive lens structure according to any one of claims 1-3, characterized in that, The adhesive used is a photothermal curing adhesive.

5. The adhesive lens structure according to claim 4, characterized in that, The curing spectrum of the adhesive has a wavelength range of 300 nm to 600 nm.

6. An optical lens, characterized in that, Includes the adhesive lens structure as described in any one of claims 1-5.

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