CN110850546A

CN110850546A - Optical lens, camera module and assembling method thereof

Info

Publication number: CN110850546A
Application number: CN201810953772.5A
Authority: CN
Inventors: 郑程倡; 向恩来; 周凯伦
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2018-08-21
Filing date: 2018-08-21
Publication date: 2020-02-28
Anticipated expiration: 2038-08-21
Also published as: CN110850546B

Abstract

The present invention provides an optical lens comprising: a first lens part including a first barrel and at least one first lens mounted within the first barrel; the second lens component comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the at least one second lens and the first lens jointly form an imaging optical system; and a first glue located in a first gap between the first lens piece and the second lens piece, the first glue adapted to support and secure the first lens piece and the second lens piece after curing; wherein the first barrel surface and/or the second barrel surface has at least one recess. The invention also provides a corresponding camera module, an optical lens and a camera module assembling method. The invention can reduce the lens position deviation and deformation caused by lens barrel deformation and can improve the imaging quality of the optical lens or the camera module.

Description

Optical lens, camera module and assembling method thereof

Technical Field

The invention relates to the technical field of optical imaging, in particular to an optical lens, a camera module and an assembling method thereof.

Background

With the popularization of mobile electronic devices, technologies related to camera modules applied to mobile electronic devices for helping users to obtain images (e.g., videos or images) have been rapidly developed and advanced, and in recent years, camera modules have been widely applied to various fields such as medical treatment, security, industrial production, and the like.

In order to meet the increasingly wide market demands, a high-pixel, small-size and large-aperture diaphragm is an irreversible development trend of the existing camera module. However, the need to achieve high pixel, small size, large aperture in the same imaging mold is very difficult. For example, the compact development of mobile phones and the increase of the mobile phone screen occupation ratio make the space inside the mobile phone available for the front camera module smaller and smaller, and the market puts forward higher and higher demands on the imaging quality of the camera module.

In the field of compact camera modules (e.g., camera modules for mobile phones), lenses are important components of camera modules, directly affecting the imaging quality of camera modules.

In the multi-group lens, the lens components are actively aligned and connected by using a rubber material, so that a complete optical system is formed. However, during the production or use process, the lens component is exposed to extreme environments such as high temperature and high humidity. The expansion of the lens material is caused by the environmental conditions of high temperature and high humidity, and the variation between the upper lens part and the lower lens part is inconsistent due to the different structures and compositions of the upper lens part and the lower lens part, so that a large stress exists in the lens, and the stress can cause the deformation of the lens parts. Therefore, by providing the concave portion on the surface of the lens member barrel, the stress of the lens member is concentrated to the position of the concave portion, and the deformation of the concave portion is utilized to reduce the deformation of the entire lens member, so that the optical system can be relatively stabilized. Meanwhile, when the concave part is mechanically deformed, the stress distribution of the lens component can be changed, and the stability of the lens is facilitated.

Disclosure of Invention

The present invention aims to provide a solution that overcomes at least one of the drawbacks of the prior art.

According to an aspect of the present invention, there is provided an optical lens including: a first lens part including a first barrel and at least one first lens mounted within the first barrel;

the second lens component comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the at least one second lens and the first lens jointly form an imaging optical system; and

a first glue located in a first gap between a first lens piece and a second lens piece, the first glue adapted to support and secure the first lens piece and the second lens piece after curing;

wherein the first barrel surface and/or the second barrel surface has at least one recess.

The first rubber material is positioned between the first lens barrel and the second lens barrel so as to maintain the relative position of the first lens part and the second lens part at the relative position determined by active calibration.

Wherein the bottom of the recess is arc-shaped.

The first lens barrel is provided with a first outer top surface, and the concave part is positioned on the first outer top surface.

The first lens barrel and the first lens are connected through adhesive glue, and the concave portion is located in an area between the adhesive glue on the first outer top surface and the first glue material.

The first lens barrel is provided with a first outer side face, and the concave part is located on the first outer side face.

Wherein the first barrel has an axis of symmetry, the recesses being evenly distributed around the axis of symmetry.

The first lens barrel is provided with a first inner top surface and a second inner top surface, the first inner top surface is in contact with the first lens, the second inner top surface is not in contact with the first lens, and the concave part is positioned on the second inner top surface.

The first lens barrel is provided with a first inner top surface and a first inner side surface which are in contact with the first lens, and the concave part is arranged at the junction of the first inner top surface and the first inner side surface.

Wherein the recess has a side surface and a bottom surface, the side surface of the recess being perpendicular to the bottom surface of the recess.

The second lens barrel is provided with an outer side face, and the concave part is located on the outer side face of the second lens barrel.

Wherein the concave part is arranged at the position of the outer side surface of the second lens barrel corresponding to one or more second lenses at the front end.

According to an aspect of the present invention, there is provided an optical lens including:

a first lens component comprising at least one first lens;

the second lens component comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the at least one second lens and the at least one first lens form an imaging optical system together; and

wherein the surface of the second barrel has at least one recess.

According to another aspect of the present invention, there is provided a camera module, including: an optical lens as claimed in any preceding claim.

According to still another aspect of the present invention, there is provided an optical lens assembling method including:

1) preparing a first lens part and a second lens part separated from each other, wherein the first lens part includes a first barrel and at least one first lens mounted in the first barrel, and the second lens part includes a second barrel and at least one second lens mounted in the second barrel;

2) pre-positioning the first lens part and the second lens part to enable the at least one first lens and the at least one second lens to jointly form an imaging optical system;

3) performing active calibration according to the actually measured imaging result of the optical system, and determining the relative positions of the first lens component and the second lens component; and

4) bonding the first lens piece and the second lens piece to support and fix the relative positions of the first lens piece and the second lens piece;

Wherein, still include between step 3) and step 4):

3') painting a first glue material on the top surface of the second lens cone.

Wherein, still include between step 1) and step 2):

1') painting a first glue material on the top surface of the second lens cone.

According to still another aspect of the present invention, there is provided a camera module assembling method, including: assembling an optical lens by using the optical lens assembling method described in any one of the above; and manufacturing a camera module based on the assembled optical lens.

Compared with the prior art, the invention has at least one of the following technical effects:

1. the invention can avoid the stress concentration of the lens barrel and reduce the deformation of the lens barrel under the extreme environments of high temperature, high humidity and the like by arranging the concave part on the surface of the lens barrel of the lens component.

2. The lens barrel reduces the deformation of the lens barrel under extreme environments because of the arrangement of the concave part, thereby keeping the stability of the lens arranged in the lens barrel and keeping the imaging performance of an optical system consisting of the lens stable.

Drawings

Exemplary embodiments are illustrated in referenced figures of the drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive.

FIG. 1 shows a schematic cross-sectional view of an optical lens of one embodiment of the invention;

fig. 2 shows a schematic cross-sectional view of a first barrel of an embodiment of the invention;

FIG. 3 shows a schematic partial cross-sectional view of an optical lens of one embodiment of the invention;

FIG. 4 shows a schematic partial cross-sectional view of an optical lens of one embodiment of the invention;

FIG. 5 shows a schematic partial cross-sectional view of an optical lens of one embodiment of the invention;

FIG. 6 shows a schematic partial cross-sectional view of an optical lens of one embodiment of the invention;

FIG. 7 shows a schematic cross-sectional view of an optical lens of one embodiment of the invention;

FIG. 8A illustrates a relative position adjustment in active calibration in one embodiment of the invention;

FIG. 8B illustrates rotational adjustment in active calibration according to another embodiment of the present invention;

fig. 8C shows a relative position adjustment with added v, w direction adjustments in an active calibration according to yet another embodiment of the present invention.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that the expressions first, second, etc. in this specification are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, a first body discussed below may also be referred to as a second body without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially," "about," and the like are used as terms of table approximation and not as terms of table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by those of ordinary skill in the art.

Unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

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

Fig. 1 shows a schematic cross-sectional view of an optical lens according to an embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the optical lens includes a first lens component 100, a second lens component 200, and a first plastic 300. The first lens component 100 comprises a first lens barrel 102 and a first lens 101 mounted in the first lens barrel 102, and the first lens barrel 102 and the first lens 101 are optionally connected by using an adhesive 103; the second lens part 200 comprises a second lens barrel 202 and five second lenses 201 installed in the second lens barrel 202, and the five second lenses 201 and the first lens 101 together form an imageable optical system; and a first rubber 300 positioned in a first gap 400 between the first lens part 100 and the second lens part 200, the first rubber 300 being adapted to support and fix the first lens 101 and the second lens part 200 after curing, wherein the first barrel surface and/or the second barrel surface has at least one recess. In this embodiment, the first lens barrel 102 and the second lens barrel 202 are optionally connected by a first glue 300 to achieve the connection of the first lens part 100 and the second lens part 200. The first rubber 300 may be adapted to support and fix the first barrel 102 and the second lens component 200, so that the relative position of the first lens component 100 and the second lens component 200 is maintained at the relative position determined by the active calibration.

The optical lens shown in fig. 1 has different amounts of expansion between lens components when exposed to extreme environments such as high temperature and high humidity conditions, causing the lens barrel portion to be pressed or stretched, resulting in tensile or compressive stress, causing the lens barrel to deform. Because the lens and the lens barrel are connected together, the deformation of the lens barrel can further cause the lens to shift or deform, so that the optical system is changed, and the imaging quality of the optical lens is reduced.

Further, in one embodiment, the first lens part 100 includes at least one first lens 101, and the second lens part includes a second barrel and at least one second lens mounted in the second barrel, and the at least one second lens and the at least one first lens together form an imageable optical system; and a first glue located in a first gap between the first lens piece and the second lens piece, the first glue adapted to support and secure the first lens piece and the second lens piece after curing; wherein the surface of the second barrel has at least one recess.

Further, in one embodiment, the first barrel 102 has an axis of symmetry about which the recesses 1020 are evenly distributed. Fig. 2 shows a schematic cross-sectional view of a first barrel according to an embodiment of the present invention. Wherein the section is a section passing through a symmetry axis of the first barrel. Referring to fig. 2, the recess 1020 assumes a notch shape in a sectional view, and the notch formed by the recess 1020 is optionally symmetrical with respect to the symmetry axis of the first barrel, thereby forming an annular recess.

In practical applications, it is found that the first lens part has a large deformation amount in an extreme environment, and therefore, in order to reduce the deformation of the optical lens when the optical lens is in an extreme environment, such as a high-temperature and high-humidity condition, a concave portion 1020 is provided on the surface of the first barrel 102 of the optical lens, when the first barrel 102 is subjected to tensile stress or compressive stress, the concave portion 1020 becomes a position where the stress is concentrated, and the expansion and contraction of the concave portion 1020 reduce the influence of the stress on the first lens part, so that the position of the first lens part is kept stable relative to the positions of other lenses.

Fig. 3 shows a schematic partial cross-sectional view of an optical lens according to an embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In the present embodiment, a concave portion 1020 is provided on the first outer top surface 1021 of the first barrel 102, wherein in order to improve the deformation resistance of the concave portion 1020, the bottom of the concave portion 1020 is preferably provided in an arc shape. In this embodiment, the recess 1020 is preferably provided in an area between the adhesive glue 103 on the first outer top surface 1021 and the first glue material 300 (a position between two dotted lines in fig. 2). Since the adhesive 103 and the first plastic 300 are stress concentration portions of the optical lens, the concave portion 1020 disposed in the area between the adhesive 103 and the first plastic 300 on the first outer top surface 1021 can absorb stress more effectively through expansion and contraction, thereby reducing the influence of stress on the first lens component, so that the position of the first lens 101 of the first lens component 100 relative to the other lenses is kept stable.

Further, in one embodiment, there is a recess 1020 on the first outer side surface 1022 of the first barrel 102. Fig. 4 shows a schematic partial cross-sectional view of an optical lens according to an embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, a concave portion 1020 is provided on the first outer side surface 1022 of the first barrel 102. In fig. 4, the concave portions 1020 are separately provided only on the first outer side surface 1022, but it is obvious to those skilled in the art that the concave portions 1020 may be provided at other positions on the first outer top surface 1021, for example, so that the stress absorbing capability is more effectively improved.

Further, in one embodiment, there is a recess 1020 on the second interior top surface 1023 of the first barrel 102. Fig. 5 shows a schematic partial cross-sectional view of an optical lens according to an embodiment of the invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, a concave portion 1020 is disposed on the second inner top surface 1023 of the first barrel 102. Referring to fig. 4, the concave portion 1020 on the second inner top surface 1023 is located in the area between the adhesive glue 103 and the first glue 300, and the concave portion 1020 at this position can absorb the stress more effectively by expansion and contraction, thereby reducing the influence of the stress on the first lens component, so that the position of the first lens 101 of the first lens component 100 is kept stable relative to the other lenses.

Further, in one embodiment, there is a recess 1020 at the intersection of the first interior top surface 1024 and the first interior side surface 1025 of the first barrel 102. Fig. 6 shows a schematic partial cross-sectional view of an optical lens according to an embodiment of the invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, a concave portion 1020 is formed at the interface between the first inner top surface 1024 and the first inner side surface 1025 of the first barrel 102. Referring to fig. 6, the concave portion 1020 is located at the intersection of the first inner top surface 1024 and the first inner side surface 1025, which is a point where stress is concentrated, and at this position, the concave portion 1020 can absorb stress more effectively by expanding and contracting, thereby reducing the influence of stress on the first lens component, so that the position of the first lens 101 of the first lens component 100 is kept stable relative to other lenses.

Further, in one embodiment, there is a recess 1020 at the outer side of the second barrel 202, wherein the recess 1020 is located at the outer side of the second barrel 202 at a position corresponding to the second lens. Preferably, the concave portion 1020 is located outside a lens having a large influence on the optical system on the outer side surface of the second barrel 202. For example, the second lens at the front end is generally relatively more sensitive, so the recess 1020 may be disposed at a position of the outer side surface of the second barrel 202 corresponding to the first second lens at the front end. Herein, the front end refers to an end close to an object side of the optical lens. Of course, in other embodiments, the concave portions 1020 may be disposed at positions corresponding to the plurality of second lenses located at the front end of the outer side surface of the second barrel 202. Further, second lens fig. 7 shows a schematic cross-sectional view of an optical lens according to an embodiment of the invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In the present embodiment, a recess 1020 is provided at an outer side surface of the second barrel 202. Referring to fig. 7, the concave portion 1020 is located at the outer side surface of the second barrel 202 corresponding to the outer side surface of the second lens 201, and the position is a point where stress is concentrated, and at this position, the concave portion 1020 can effectively absorb stress by expansion and contraction, thereby reducing the influence of stress on the second lens part, so that the position of the second lens 201 of the second lens part 200 is kept stable relative to other lenses. In this embodiment, the recess 1020 has side surfaces and a bottom surface, the side surfaces of the recess being perpendicular to the bottom surface of the recess.

In the above embodiment, the concave portions 1020 are respectively disposed on the first outer top surface 1021, the first outer side surface 1022, the second inner top surface 1023, the boundary between the first inner top surface 1024 and the first inner side surface 1025, and the outer side surface of the second barrel 202 of the first barrel 102, so that the stress of the optical lens can be absorbed in extreme environments, the positions of the lenses relative to other lenses can be kept stable, and the imaging quality of the optical lens can be ensured. The concave portion 1020 may be provided on a surface of the lens barrel (the first barrel or the second barrel) alone, one concave portion 1020 may be provided on each surface of the lens barrel at the same time, a plurality of concave portions 1020 may be provided on a surface of the lens barrel, or a plurality of concave portions 1020 may be provided on each surface of the lens barrel at the same time.

Further, in another embodiment of the present invention, a camera module based on the optical lens is further provided. The camera module comprises an optical lens and a photosensitive assembly. Wherein the optical lens may be the optical lens in any of the embodiments described above.

There is also provided, in accordance with an embodiment of the present invention, an optical lens assembly method, including:

step S10, a preparation step. A first lens part 100 and a second lens part 200 are prepared to be separated from each other, wherein the first lens part 100 includes a first barrel 102 and at least one first lens 101 mounted in the first barrel 102, and the second lens part 200 includes a second barrel 202 and at least one second lens 201 mounted in the second barrel 202.

Step S20, pre-positioning step. The first lens part 100 and the second lens part 200 are pre-positioned, so that the at least one first lens 101 and the at least one second lens 201 together form an imageable optical system.

Step S30, active calibration step. And performing active calibration according to the measured imaging result of the optical system, and determining the relative positions of the first lens component 100 and the second lens component 200.

Step S40, bonding the first lens part 100 and the second lens part 200 to support and fix the relative positions of the first lens part 100 and the second lens part 200, wherein an included angle α between the axis of the first lens part 100 and the axis of the second lens part 200 is different from zero.

Wherein, in the above method, the first barrel surface and/or the second barrel surface has at least one recess.

Further, in one embodiment, between step S30 and step S40, further comprising:

step S30', a first adhesive is painted on the top surface of the second barrel 202.

Further, in one embodiment, between step S10 and step S20, further comprising:

step S10', a first adhesive is painted on the top surface of the second barrel 202.

Further, in another embodiment of the present invention, an assembling method of an image pickup module based on the optical lens is also provided. The camera module assembly side comprises an optical lens and a photosensitive assembly. The assembling method of the optical lens can be the assembling method of the optical lens in any of the foregoing embodiments.

Further, the active calibration described herein may adjust the relative positions of the first lens component 100 and the second lens component 200 in multiple degrees of freedom. The active calibration refers to controlling one lens component to adjust relative to the other lens component to calibrate the whole optical system according to the actually measured resolution of the optical system, so that the axis of each lens component is adjusted consistently, and the actually measured resolution of the optical system reaches the standard. FIG. 8A illustrates a relative position adjustment in active calibration in one embodiment of the invention. In this adjustment manner, the first lens component 100 can move along the x, y, and z directions relative to the second lens component 200 (i.e., the relative position adjustment in this embodiment has three degrees of freedom). Where the z-direction is the direction along the optical axis and the x, y-directions are the directions perpendicular to the optical axis. The x, y directions both lie in a tuning plane P within which translation can be resolved into two components in the x, y directions.

FIG. 8B illustrates rotational adjustment in active calibration according to another embodiment of the present invention. In this embodiment, the relative position adjustment has an increased rotational degree of freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 8A. In the present embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, i.e. a rotation around an axis perpendicular to the adjustment plane P.

Further, fig. 8C shows a relative position adjustment manner with v and w direction adjustments added in the active calibration according to yet another embodiment of the present invention. Where the v direction represents the rotation angle of the xoz plane, the w direction represents the rotation angle of the yoz plane, and the rotation angles of the v direction and the w direction may be combined into a vector angle representing the total tilt state. That is, by the v-direction and w-direction adjustment, the tilt posture of the first lens component 100 with respect to the second lens component 200 (i.e., the tilt of the optical axis of the first lens component 100 with respect to the optical axis of the second lens component 200) can be adjusted.

The adjustment of the above-mentioned six degrees of freedom x, y, z, r, v, and w may affect the imaging quality of the optical system (e.g., affect the magnitude of the resolution). In other embodiments of the present invention, the relative position adjustment may be performed by adjusting only any one of the six degrees of freedom, or by a combination of any two or more of the six degrees of freedom.

Further, in an embodiment, in the active calibration step, the movement further comprises a translation in the adjustment plane, i.e. a movement in the x, y direction.

Further, in one embodiment, the active calibration further comprises: and adjusting and determining the included angle of the axis of the first lens component 100 relative to the axis of the second lens component 200, namely the adjustment in the w and v directions according to the measured resolution force of the optical system. In the assembled optical lens or camera module, an included angle between the axis of the first lens component 100 and the axis of the second lens component 200 may be different from zero.

Further, in one embodiment, the active calibration further comprises: moving the first lens component 100 in a direction perpendicular to the adjustment plane (i.e. adjustment in z-direction), the relative position between the first lens component 100 and the second lens component 200 in the direction perpendicular to the adjustment plane is determined from the measured resolving power of the optical system.

Further, in one embodiment, in the pre-positioning step, a gap is formed between the bottom surface of the first lens component 100 and the top surface of the second lens component 200.

In one embodiment, in the active calibration step, the second lens component 200 may be fixed, the first lens component 100 may be held by a clamp, and the first lens component 100 may be moved by a six-axis movement mechanism connected to the clamp, so as to achieve the above-mentioned relative movement between the first lens component 100 and the second lens component 200 in six degrees of freedom. Wherein the clip may bear against or partially bear against a side of the first lens component 100, thereby clipping the first lens component 100.

In the above embodiments, as an example, the optical lens is described as including the first lens part and the second lens part. However, the number of lens components in the optical lens is not particularly limited, i.e., the number of lens components is not limited to two, and may be three or four, etc., depending on the particular design needs.

The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. An optical lens, comprising:

a first lens part including a first barrel and at least one first lens mounted within the first barrel;

2. An optical lens according to claim 1, wherein the first glue is located between the first barrel and the second barrel to maintain the relative position of the first lens component and the second lens component at the relative position determined by the active calibration.

3. An optical lens according to claim 1, characterized in that the bottom of the recess is arc-shaped.

4. An optical lens according to claim 1, wherein the first barrel has a first outer top surface, and the recess is located on the first outer top surface.

5. An optical lens barrel according to claim 4, wherein the first barrel and the first lens are connected by an adhesive, and the recess is located in an area between the adhesive and the first glue material on the first outer top surface.

6. An optical lens according to claim 1, wherein the first barrel has a first outer side surface, and the recess is located on the first outer side surface.

7. An optical lens according to claim 1, characterized in that the first barrel has an axis of symmetry, the recesses being evenly distributed around the axis of symmetry.

8. An optical lens barrel according to claim 1, wherein the first barrel has a first inner top surface in contact with the first lens and a second inner top surface not in contact with the first lens, the recess being located on the second inner top surface.

9. An optical lens barrel according to claim 1, wherein the first barrel has a first inner top surface and a first inner side surface which are in contact with the first lens, and the recess is provided at a boundary of the first inner top surface and the first inner side surface.

10. An optical lens according to claim 1, characterized in that the recess has side faces and a bottom face, the side faces of the recess being perpendicular to the bottom face of the recess.

11. An optical lens according to claim 1, wherein the second barrel has an outer side face, and the recess is located on the outer side face of the second barrel.

12. The optical lens barrel according to claim 1, wherein the concave portion is provided at a position of the outer side surface of the second barrel corresponding to the one or more second lenses at the front end.

13. An optical lens, comprising:

a first lens component comprising at least one first lens;

wherein the surface of the second barrel has at least one recess.

14. The utility model provides a module of making a video recording which characterized in that includes: an optical lens as claimed in any one of claims 1 to 13.

15. An optical lens assembly method, comprising:

16. The method of assembling of claim 15, further comprising, between step 3) and step 4):

3') painting a first glue material on the top surface of the second lens cone.

17. The method of assembling of claim 15, further comprising, between step 1) and step 2):

1') painting a first glue material on the top surface of the second lens cone.

18. A camera module assembly method is characterized by comprising the following steps: assembling an optical lens using the optical lens assembling method of any one of claims 15 to 17; and manufacturing a camera module based on the assembled optical lens.