CN221039580U - Optical lens - Google Patents

Abstract

The utility model provides an optical lens. The optical lens comprises a lens barrel, a first lens group and a second lens group, wherein the first lens group and the second lens group are arranged in the lens barrel at intervals along an optical axis of the lens barrel, the first lens group at least comprises a lens, the second lens group at least comprises a lens, a large-level-difference structure or a large-gap structure exists between the first lens group and the second lens group, and the lens in the first lens group, which is close to the second lens group, or the lens in the second lens group, which is close to the first lens group, is fixedly connected with the lens barrel through a connecting structure, and the connecting structure comprises a glue structure. The utility model solves the problems of heavy weight and high cost of the optical lens in the prior art.

Description

Optical lens

Technical Field

The utility model relates to the technical field of optical imaging equipment, in particular to an optical lens.

Background

The optical lens is a key component for imaging in various electronic devices such as security monitoring cameras, mobile phones, vehicle-mounted imaging and the like, and the performance requirement of the optical lens is higher and higher along with the development of technology and the increase of requirements. The optical lens is generally provided with a plurality of lenses, so that the plurality of lenses can correct and compensate imaging, the capability of converging light is improved, the resolving power and the contrast of the optical lens are enhanced, and the quality of imaging can be greatly improved.

However, the current large-level-difference or large-gap optical lens has various assembly problems. For example, in the existing large-level-difference or large-gap optical lens, a large-size metal spacer ring or a plurality of metal spacer rings are generally selected to realize the assembly of the large-level-difference or large-gap lens, and the addition of the large-size metal spacer ring or the plurality of metal spacer rings certainly increases the overall weight and cost of the optical lens and is simultaneously unfavorable for the convenience of assembly.

That is, the optical lens in the related art has problems of heavy weight and high cost.

Disclosure of utility model

The utility model mainly aims to provide an optical lens to solve the problems of heavy weight and high cost of the optical lens in the prior art.

In order to achieve the above object, the present utility model provides an optical lens, including a lens barrel, and a first lens group and a second lens group disposed in the lens barrel at intervals along an optical axis of the lens barrel, the first lens group including at least one lens, the second lens group including at least one lens, a large-step structure or a large-gap structure being present between the first lens group and the second lens group, a lens of the first lens group adjacent to the second lens group or a lens of the second lens group adjacent to the first lens group being fixedly connected to the lens barrel through a connection structure, the connection structure including a glue structure.

Further, when there is a large-step structure between the first lens group and the second lens group, the height a of the lens barrel and the radial step B between the first lens group and the second lens group satisfy: 3.5< A/B <5.

Further, when a large gap structure exists between the first lens group and the second lens group, the axial length C of the lens barrel and the axial gap D between the first lens group and the second lens group satisfy: 3.5< C/D <5.

Further, the connecting structure is a glue structure or a combination of the glue structure and the pressing ring.

Further, when the connection structure is a combination of the glue structure and the pressing ring, the axial length of the pressing ring is smaller than the axial distance between the first lens group and the second lens group, the outer peripheral edge part of one side, which is far away from the lens, of the pressing ring is provided with a glue dispensing groove, and the glue structure is arranged between the glue dispensing groove and the inner wall surface of the lens barrel.

Further, the optical lens further comprises a shading sheet, and the shading sheet is positioned between the pressing ring and the lens abutted by the pressing ring.

Further, the lens barrel is provided with a first end and a second end which are oppositely arranged, the first end of the lens barrel is provided with a buckling structure, the first lens group and the second lens group are sequentially arranged along the direction away from the buckling structure, lenses of the first lens group away from the second lens group are abutted with the buckling structure, and at the moment, the lenses of the first lens group close to the second lens group are fixedly connected with the lens barrel through a connecting structure.

Further, the lens barrel is provided with a first end and a second end which are oppositely arranged, the second end of the lens barrel is provided with a buckling structure, the first lens group and the second lens group are sequentially arranged along the direction close to the buckling structure, lenses, far away from the first lens group, in the second lens group are abutted with the buckling structure, and at the moment, the lenses, close to the first lens group, in the second lens group are fixedly connected with the lens barrel through a connecting structure.

Further, when the connection structure is a glue structure, the outer diameter G2 of the lens in contact with the glue structure and the axial length H of the glue structure satisfy: 7.5< G2/H <13.

Further, the radial bearing distance E between the lens and the lens barrel in the lens group far away from the buckling structure and the radius G1 of the lens satisfy the following conditions: 10< G1/E <26.

By applying the technical scheme of the utility model, the optical lens comprises a lens barrel, and a first lens group and a second lens group which are arranged in the lens barrel at intervals along the optical axis of the lens barrel, wherein the first lens group at least comprises a lens, the second lens group at least comprises a lens, a large-step structure or a large-gap structure exists between the first lens group and the second lens group, and the lens in the first lens group close to the second lens group or the lens in the second lens group close to the first lens group is fixedly connected with the lens barrel through a connecting structure, and the connecting structure comprises a glue structure.

There is big difference of level structure or big clearance structure between first lens group and the second lens group, be close to the lens of second lens group in the first lens group or be close to the lens of first lens group and lens cone pass through connection structure fixed connection in the second lens group, the setting makes in the in-process of assembling first lens group and second lens group into the lens cone, last lens of first lens group or last lens of second lens group can pass through connection structure and the internal face fixed connection of lens cone, connection structure includes glue structure, adopt the mode of cementing at least to realize fixed assembly, avoid increasing large-size metal spacer ring or a plurality of spacer rings in big difference of level structure or big clearance structure department and realize the condition of assemblage, save the part, the whole weight of optical lens has been alleviateed, realized the lightweight, the cost is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 is a schematic view showing a structure of an optical lens according to a first embodiment of the present utility model;

Fig. 2 is a schematic diagram showing another structure of an optical lens according to a first embodiment of the present utility model;

fig. 3 is a schematic structural diagram of an optical lens according to a second embodiment of the present utility model;

fig. 4 is a schematic diagram showing another structure of an optical lens according to a second embodiment of the present utility model;

Fig. 5 is a schematic view showing a structure of an optical lens according to a third embodiment of the present utility model;

Fig. 6 shows another schematic structural diagram of an optical lens according to a third embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. A lens barrel; 11. a buckling structure; 20. a first lens group; 30. a second lens group; 41. a glue structure; 42. a pressing ring; 421. a dispensing groove; 50. a shading sheet.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

In order to solve the problems of heavy weight and high cost of the optical lens in the prior art, the utility model provides the optical lens.

As shown in fig. 1 to 6, the optical lens includes a lens barrel 10, and a first lens group 20 and a second lens group 30 disposed in the lens barrel 10 at intervals along an optical axis of the lens barrel 10, the first lens group 20 includes at least one lens, the second lens group 30 includes at least one lens, a large step structure or a large gap structure exists between the first lens group 20 and the second lens group 30, the lens of the first lens group 20 close to the second lens group 30 or the lens of the second lens group 30 close to the first lens group 20 is fixedly connected with the lens barrel 10 through a connection structure including a glue structure 41.

There is a large-step structure or a large gap structure between the first lens group 20 and the second lens group 30, and the lens of the first lens group 20 close to the second lens group 30 or the lens of the second lens group 30 close to the first lens group 20 are fixedly connected with the lens barrel 10 through a connecting structure, so that in the process of assembling the first lens group 20 and the second lens group 30 into the lens barrel 10, the last lens of the first lens group 20 or the last lens of the second lens group 30 can be fixedly connected with the inner wall surface of the lens barrel 10 through the connecting structure, the connecting structure comprises a glue structure 41, at least the glue structure is adopted to realize the fixed assembly, the situation that a large-size metal spacer ring or a plurality of spacer rings are added at the large-step structure or the large-gap structure to realize the assembly is avoided, the parts are saved, the whole weight of the optical lens is lightened, and the cost is reduced.

Specifically, when there is a large-step structure between the first lens group 20 and the second lens group 30, the height a of the lens barrel 10 and the radial step B between the first lens group 20 and the second lens group 30 satisfy: 3.5< A/B <5. The relation is satisfied, and the step difference of the optical lens is large.

Specifically, when a large gap structure exists between the first lens group 20 and the second lens group 30, the axial length C of the lens barrel 10 and the axial gap D between the first lens group 20 and the second lens group 30 satisfy: 3.5< C/D <5. Satisfying this relation, the gap between the first lens group 20 and the second lens group 30 of the optical lens is large, which is specifically referred to as an axial gap.

In an alternative embodiment of the application, the connection structure is a glue structure 41. In another alternative embodiment of the application, there is a combination of glue structure 41 and clamping ring 42. The glue structure 41 is adopted to realize the glue joint of the last lens of the first lens group 20 or the last lens of the second lens group 30 and the lens barrel 10, or the pressing ring 42 is abutted on the last lens of the first lens group 20 or the last lens of the second lens group 30, and then the glue joint of the pressing ring 42 and the lens barrel 10 is realized by adopting the glue structure 41, so that the first lens group 20 and the second lens group 30 can be assembled in a grouping mode, a plurality of spacing rings or large spacing rings abutted to each other are not added between the first lens group 20 and the second lens group 30, the reliability of the assembly of the optical lens can be improved, the use of metal light shielding sheets and spacing rings is reduced, and the cost is obviously reduced.

Specifically, when the connection structure is a combination of the glue structure 41 and the pressing ring 42, the pressing ring 42 abuts against a side surface of the lens, which is close to the second lens group 30, in the first lens group 20 and faces the second lens group 30 or abuts against a side surface of the lens, which is close to the first lens group 20, in the second lens group 30 and faces the first lens group 20, and then fixation of the pressing ring 42 and the inner wall surface of the lens barrel 10 is achieved through the glue structure 41. The axial length of the pressing ring 42 is smaller than the axial distance between the first lens group 20 and the second lens group 30, the outer peripheral edge part of one side of the pressing ring 42 away from the lens which the pressing ring is abutted against is provided with a glue dispensing groove 421, and the glue structure 41 is arranged between the glue dispensing groove 421 and the inner wall surface of the lens barrel 10. In the dispensing process, after the glue fills the dispensing groove 421 and overflows, the glue flows naturally along the periphery of the pressing ring 42 to complete dispensing and fixing.

Here, the pressing ring 42 in the present application is not an existing spacer ring, and the pressing ring 42 is abutted against only one lens, not against between two lenses disposed at a distance.

Specifically, the optical lens further includes a light shielding sheet 50, and the light shielding sheet 50 is located between the pressing ring 42 and the lens abutted by the pressing ring. The light leakage can be shielded by arranging the light shielding sheet 50, and the light shielding sheet 50 can shield redundant light; when stray light is seriously required to be improved, the light shielding sheet 50 is added for absorbing the stray light.

Specifically, when the connection structure is the glue structure 41, the outer diameter G2 of the lens in contact with the glue structure 41 and the axial length H of the glue structure 41 satisfy: 7.5< G2/H <13. This arrangement is advantageous in ensuring that the axial length of the glue structure 41 is sufficient to ensure the reliability of the fixing of the assembled lens. Too long a glue structure 41 will cause the glue to overflow resulting in an appearance NG that is too short to secure the lens reliably.

Specifically, the lens barrel 10 has a first end and a second end that are disposed opposite to each other, the first end or the second end of the lens barrel 10 has a buckling structure 11, and a radial bearing distance E between a lens in a lens group far from the buckling structure 11 and the lens barrel 10 and a radius G1 of the lens satisfy: 10< G1/E <26. Satisfying the condition can ensure that the last lens of the lens group and the lens barrel 10 have enough bearing length, and too long bearing can not ensure the flatness of the bearing surface, which can lead to the occurrence of the phenomenon of assembling inclination of the lens and affect the performance of the optical lens.

The optical lens of the present application is described below with reference to specific embodiments and drawings.

Example 1

As shown in fig. 1 and 2, an optical lens of the first embodiment is described.

In the first embodiment, the optical lens is a small-head lens, and the first lens group 20 and the second lens group 30 of the optical lens have a large-step structure, the first lens group 20 comprises three lenses, and the second lens group 30 comprises one lens.

Specifically, the lens barrel 10 has a first end and a second end that are disposed opposite to each other, the first end of the lens barrel 10 has a fastening structure 11, the first lens group 20 and the second lens group 30 are disposed sequentially along a direction away from the fastening structure 11, and a lens of the first lens group 20 away from the second lens group 30 is abutted to the fastening structure 11, at this time, a lens of the first lens group 20 close to the second lens group 30 is fixedly connected with the lens barrel 10 through a connection structure.

In the optical lens shown in fig. 1, the connection structure is a glue structure 41. When assembling, the first lens group 20 is assembled in the lens barrel 10, then the fixing with the lens barrel 10 is realized by dispensing the last lens of the first lens group 20, then the second lens group 30 is assembled in the lens barrel 10, and the assembly of the second lens group 30 is realized by dispensing the last lens of the second lens group 30. The present embodiment adopts a manner of respectively assembling the first lens group 20 and the second lens group 30, which can greatly increase the convenience of assembly, omit a metal spacer and reduce the cost.

In the optical lens shown in fig. 2, the connection structure is a combination of a glue structure 41 and a pressing ring 42. And a light shielding sheet 50 is provided on the left side of the press ring 42. When assembling, the first lens group 20 is assembled in the lens barrel 10, the light shielding sheet 50 and the pressing ring 42 are assembled on the last lens of the first lens group 20 in sequence, then the pressing ring 42 is glued with the lens barrel 10 in a glue dispensing mode, so that the first lens group 20 is fixed, then the second lens group 30 is assembled in the lens barrel 10, and the second lens group 30 is assembled in a glue dispensing mode for the last lens of the second lens group 30. The present embodiment adopts a manner of respectively assembling the first lens group 20 and the second lens group 30, which can greatly increase the convenience of assembly, omit a metal spacer and reduce the cost.

In the present embodiment, the height a of the lens barrel 10 is 3.05mm. The radial step B between the first lens group 20 and the second lens group 30 is 0.65mm. The radial bearing distance E of the lens in the lens group away from the snap-fit structure 11 and the barrel 10 is 0.047mm. When the connecting structure is a glue structure 41, the outer diameter G2 of the lens in contact with the glue structure 41 is 1.13mm and the axial length H of the glue structure 41 is 0.14mm.

Example two

As shown in fig. 3 and 4, the optical lens of the second embodiment is described.

In the second embodiment, the optical lens is a telephoto lens, a large gap structure is provided between the first lens group 20 and the second lens group 30 of the optical lens, the first lens group 20 includes one lens, and the second lens group 30 includes two lenses.

Specifically, the lens barrel 10 has a first end and a second end that are disposed opposite to each other, the second end of the lens barrel 10 has a fastening structure 11, the first lens group 20 and the second lens group 30 are disposed sequentially along a direction close to the fastening structure 11, and a lens of the second lens group 30 far away from the first lens group 20 is abutted to the fastening structure 11, and at this time, a lens of the second lens group 30 close to the first lens group 20 is fixedly connected with the lens barrel 10 through a connection structure.

In the optical lens shown in fig. 3, the connection structure is a glue structure 41. When assembling, the second lens group 30 is assembled in the lens barrel 10, then the fixing with the lens barrel 10 is realized by dispensing the last lens of the second lens group 30, then the first lens group 20 is assembled in the lens barrel 10, and the first lens group 20 is assembled by dispensing the last lens of the first lens group 20 by another pressing ring. The present embodiment adopts a manner of respectively assembling the first lens group 20 and the second lens group 30, which can greatly increase the convenience of assembly, omit a metal spacer and reduce the cost.

In the optical lens shown in fig. 4, the connection structure is a combination of a glue structure 41 and a pressing ring 42. And a light shielding sheet 50 is provided on the right side of the press ring 42. When assembling, the second lens group 30 is assembled in the lens barrel 10, the light shielding sheet 50 and the pressing ring 42 are assembled on the last lens of the second lens group 30 in sequence, then the pressing ring 42 is glued to the lens barrel 10 in a dispensing mode, the fixed assembly of the second lens group 30 is realized, then the first lens group 20 is assembled in the lens barrel 10, and the assembly of the first lens group 20 is realized in a dispensing mode of the last lens of the first lens group 20 by adopting another pressing ring. The present embodiment adopts a manner of respectively assembling the first lens group 20 and the second lens group 30, which can greatly increase the convenience of assembly, omit a metal spacer and reduce the cost.

In the present embodiment, the axial length C of the lens barrel 10 is 9.69mm. The axial gap D between the first lens group 20 and the second lens group 30 is 1.94mm. The radial bearing distance E between the lenses of the first lens group 20 and the lens barrel 10 is 0.22mm. The radius G1 of the lenses of the first lens group 20 is 5.02mm. When the connecting structure is a glue structure 41, the outer diameter G2 of the lens in contact with the glue structure 41 is 4.45mm and the axial length H of the glue structure 41 is 0.62mm.

Example III

As shown in fig. 5 and 6, the optical lens of the third embodiment is described.

In the third embodiment, the optical lens is a normal fixed focus lens, and the first lens group 20 and the second lens group 30 of the optical lens have a large-step structure, the first lens group 20 includes five lenses, and the second lens group 30 includes two lenses.

Specifically, the lens barrel 10 has a first end and a second end that are disposed opposite to each other, the first end of the lens barrel 10 has a fastening structure 11, the first lens group 20 and the second lens group 30 are disposed sequentially along a direction away from the fastening structure 11, and a lens of the first lens group 20 away from the second lens group 30 is abutted to the fastening structure 11, at this time, a lens of the first lens group 20 close to the second lens group 30 is fixedly connected with the lens barrel 10 through a connection structure.

In the optical lens shown in fig. 5, the connection structure is a glue structure 41. When assembling, the first lens group 20 is assembled in the lens barrel 10, then the fixing with the lens barrel 10 is realized by dispensing the last lens of the first lens group 20, then the second lens group 30 is assembled in the lens barrel 10, and the assembly of the second lens group 30 is realized by dispensing the last lens of the second lens group 30 by adopting another pressing ring. The present embodiment adopts a manner of respectively assembling the first lens group 20 and the second lens group 30, which can greatly increase the convenience of assembly, omit a metal spacer and reduce the cost.

In the optical lens shown in fig. 6, the connection structure is a combination of a glue structure 41 and a pressing ring 42. And a light shielding sheet 50 is provided on the left side of the press ring 42. When assembling, the first lens group 20 is assembled in the lens barrel 10, the light shielding sheet 50 and the pressing ring 42 are assembled on the last lens of the first lens group 20 in sequence, then the pressing ring 42 is glued with the lens barrel 10 in a dispensing mode, so that the first lens group 20 is fixed, then the second lens group 30 is assembled in the lens barrel 10, and the second lens group 30 is assembled in a dispensing mode by adopting another pressing ring to the last lens of the second lens group 30. The present embodiment adopts a manner of respectively assembling the first lens group 20 and the second lens group 30, which can greatly increase the convenience of assembly, omit a metal spacer and reduce the cost.

In the present embodiment, the height a of the lens barrel 10 is 6.07mm. The radial step B between the first lens group 20 and the second lens group 30 is 1.46mm. The radial bearing distance E between the first lens of the second lens group 30 and the lens barrel 10 is 0.22mm. When the connecting structure is a glue structure 41, the outer diameter G2 of the lens in contact with the glue structure 41 is 3.42mm and the axial length H of the glue structure 41 is 0.28mm.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An optical lens is characterized by comprising a lens barrel (10), a first lens group (20) and a second lens group (30) which are arranged in the lens barrel (10) at intervals along an optical axis of the lens barrel (10), wherein the first lens group (20) at least comprises one lens, the second lens group (30) at least comprises one lens, a large-level-difference structure or a large-gap structure exists between the first lens group (20) and the second lens group (30),

The lens in the first lens group (20) close to the second lens group (30) or the lens in the second lens group (30) close to the first lens group (20) is fixedly connected with the lens barrel (10) through a connecting structure, and the connecting structure comprises a glue structure (41).

2. The optical lens according to claim 1, wherein when a large step structure is present between the first lens group (20) and the second lens group (30),

A radial step B between the height A of the lens barrel (10) and the first lens group (20) and the second lens group (30) is satisfied: 3.5< A/B <5.

3. The optical lens according to claim 1, wherein, when a large gap structure is present between the first lens group (20) and the second lens group (30),

An axial clearance D between the axial length C of the lens barrel (10) and the first lens group (20) and the second lens group (30) is satisfied: 3.5< C/D <5.

4. Optical lens according to claim 1, characterized in that the connection structure is the glue structure (41) or a combination of the glue structure (41) and a clamping ring (42).

5. The optical lens according to claim 4, wherein when the connection structure is a combination of the glue structure (41) and the pressing ring (42), an axial length of the pressing ring (42) is smaller than an axial distance between the first lens group (20) and the second lens group (30), an outer peripheral portion of a side of the pressing ring (42) away from the lens against which the pressing ring is abutted has a glue dispensing groove (421), and the glue structure (41) is disposed between the glue dispensing groove (421) and an inner wall surface of the lens barrel (10).

6. The optical lens of claim 4, further comprising a light shield (50), the light shield (50) being located between the press ring (42) and the lens against which it abuts.

7. The optical lens according to claim 2, wherein the lens barrel (10) has a first end and a second end which are oppositely disposed, the first end of the lens barrel (10) has a fastening structure (11), the first lens group (20) and the second lens group (30) are sequentially disposed along a direction away from the fastening structure (11), and a lens of the first lens group (20) away from the second lens group (30) is abutted to the fastening structure (11), at this time, a lens of the first lens group (20) close to the second lens group (30) is fixedly connected with the lens barrel (10) through a connecting structure.

8. An optical lens according to claim 3, wherein the lens barrel (10) has a first end and a second end which are disposed opposite to each other, the second end of the lens barrel (10) has a fastening structure (11), the first lens group (20) and the second lens group (30) are disposed in sequence along a direction close to the fastening structure (11), and a lens of the second lens group (30) away from the first lens group (20) is abutted to the fastening structure (11), and at this time, a lens of the second lens group (30) close to the first lens group (20) is fixedly connected to the lens barrel (10) by a connecting structure.

9. Optical lens according to claim 4, characterized in that, when the connection structure is a glue structure (41), the outer diameter G2 of the lens in contact with the glue structure (41) and the axial length H of the glue structure (41) satisfy: 7.5< G2/H <13.

10. Optical lens according to claim 7 or 8, characterized in that the radial bearing distance E between the lens in the lens group remote from the snap-in structure (11) and the barrel (10) and the radius G1 of the lens is such that: 10< G1/E <26.