CN112534328B

CN112534328B - Optical lens, camera module and assembling method thereof

Info

Publication number: CN112534328B
Application number: CN201980036283.6A
Authority: CN
Inventors: 方银丽; 蒋恒; 田中武彦; 刘林; 褚水佳
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2018-04-28
Filing date: 2019-04-26
Publication date: 2023-07-07
Anticipated expiration: 2039-04-26
Also published as: CN112534328A

Abstract

An optical lens comprising: a first lens component (100) comprising at least one first lens (120); a second lens component (200) that includes a second barrel (210) and at least one second lens (220) mounted on the second barrel, and that forms an imageable optical system together with the at least one first lens, wherein at least a portion of an outer side surface of a bottommost second lens (230) of the at least one second lens is exposed to the outside of the second barrel, and a top surface of the bottommost second lens bears against a bottom surface of the second barrel; and a connecting medium adapted to fix the first lens part and the second lens part together. A corresponding camera module, an optical lens and an assembly method of the camera module are also provided. The size of the optical lens in the direction perpendicular to the optical axis can be effectively reduced on the premise of the established optical design, and the imaging quality of the optical lens can be ensured.

Description

Optical lens, camera module and assembling method thereof

Cross reference

The present application claims the 201810401370.4 patent application entitled "optical lens, camera module and method of assembly" filed on the 4 th month 28 th 2018 th month to the chinese patent office, the 201820629867.7 patent application entitled "optical lens and camera module" filed on the 4 th month 28 th 2018 th month to the chinese patent office, the 201810403057.4 patent application entitled "optical lens, camera module and method of assembly" filed on the 4 th month 28 th 2018 th month to the chinese patent office, the 201820629848.4 patent application entitled "optical lens and camera module" filed on the 4 th month 28 th 2018 th month to the chinese patent office, the 201810403069.7 patent application entitled "optical lens, camera module and method of assembly" filed on the 4 th month 28 th month to the 2018 th month to the chinese patent office, and the 201820629876.6 patent application entitled "optical lens and module" filed on the 4 th month 28 th month to the chinese patent office, all of which are incorporated herein by reference.

Technical Field

The present application relates to the field of optical imaging technology, and in particular, to an optical lens, an imaging module, and an assembling method thereof.

Background

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

In order to meet the increasingly wide market demands, high-pixel, small-size and large-aperture imaging modules are irreversible development trends. However, the need to achieve three aspects of high pixels, small size, large aperture in the same camera molding is very difficult. For example, the compact development of mobile phones and the increase of the screen ratio of mobile phones make the space inside the mobile phones capable of being used for the front camera module smaller and smaller, and the market has put forward higher and higher demands on the imaging quality of the camera module. In addition, the accommodating space of the front camera shooting module of the mobile phone is far smaller than the accommodating space of the rear camera of the mobile phone. However, the pursuit of characteristics such as high pixels and large aperture has determined that it is difficult to further reduce the size of the lens in terms of optical design of the lens.

On the other hand, the market is providing higher and higher demands on the imaging quality of the camera module. Mass-produced optical lenses and camera modules, in the field of compact camera modules (e.g., camera modules for mobile phones), also need to take into account the quality of the optical imaging lens and manufacturing errors in the module packaging process. Specifically, in the manufacturing process of the optical imaging lens, factors affecting the resolution of the lens come from errors in the assembly of the elements, errors in the thickness of the lens spacing elements, errors in the assembly fit of the lenses, variations in the refractive index of the lens material, and the like. The errors of the components and the assembly thereof comprise errors such as the thickness of the optical surface of each lens unit, the sagittal height of the optical surface of the lens, the surface of the optical surface, the radius of curvature, the single surface and the decentration between the surfaces of the lens, the inclination of the optical surface of the lens and the like, and the sizes of the errors depend on the control capability of the mold precision and the molding precision. The error in the thickness of the lens spacing element depends on the accuracy of the machining of the element. The error in fitting of the lenses depends on the dimensional tolerance of the elements to be fitted and the fitting accuracy of the lens. The errors introduced by the variation in refractive index of the lens material depend on the stability of the material and the batch consistency. The error of each element affecting the resolution is accumulated and deteriorated, and the accumulated error is increased with the increase of the number of lenses. The existing solution is to control tolerance for the size of each element with high relative sensitivity and compensate for lens rotation to improve the solution, but because the lens with high pixel and large aperture is sensitive, the tolerance is strict, such as: partial sensitive lens 1um lens eccentricity can bring 9' image surface inclination, leads to lens processing and equipment degree of difficulty to be greater and greater, simultaneously because feedback period is long in the assembly process, causes the process ability index (CPK) of lens equipment low, undulant big, leads to the defective rate high. And as described above, because there are many factors affecting the resolution of the lens, there are limits on the manufacturing accuracy for each factor, if only the accuracy of each element is simply improved, the improvement ability is limited, the improvement cost is high, and the imaging quality requirements of the market increasing are not satisfied.

Further, in the field of mobile phone camera modules, typical mass-production optical lenses in the market at present are assembled in a way of embedding the optical lenses piece by piece. Specifically, a lens barrel having a stepped bearing surface on the inner side is prepared in advance, and then each lens from small to large is fitted into the lens barrel piece by piece and is held against the corresponding stepped bearing surface to obtain a complete optical lens. On the basis, how to further reduce the sizes of the optical lens and the camera module and ensure the reliability of the module or the lens on the premise of ensuring high imaging quality is a current urgent problem to be solved.

The applicant provides an assembly method for adjusting and determining the relative positions of an upper sub-lens and a lower sub-lens based on an active calibration process, and then bonding the upper sub-lens and the lower sub-lens together according to the determined relative positions, so as to manufacture a complete optical lens or an image pickup module. The solution can improve the process capability index (CPK) of mass-produced optical lenses or camera modules; the requirements on the precision of each element of materials (such as a sub-lens or a photosensitive assembly for assembling an optical lens or a camera module) and the assembly precision thereof can be widened and loosened, so that the overall cost of the optical imaging lens and the camera module is reduced; various aberrations of the camera module can be adjusted in real time in the assembly process, the reject ratio is reduced, the production cost is reduced, and the imaging quality is improved.

However, active calibration of the optical system of the lens is a new production process, and the actual mass production needs to consider many factors such as reliability, anti-falling property, weather resistance, and manufacturing cost of the optical lens and the camera module, and sometimes needs to face the decline of yield caused by various non-measurable factors. For example, in one process scenario, a glue material is filled between the first lens component and the second lens component to maintain the first lens component and the second lens component in a relative position determined by active calibration. However, actual trial production shows that the imaging quality of the optical lens and the camera module often deteriorates compared with the imaging quality obtained in the active calibration stage, and the deterioration sometimes exceeds the tolerance range, resulting in poor products. The applicant has found that, after the active calibration process is introduced in the assembly of the optical lens or the camera module, variations in the glue, barrel or lens and other unknown factors may be the cause of the above problems. There is an urgent need for a solution that overcomes the above problems to further improve product yields.

Disclosure of Invention

According to one aspect of the present application, there is provided an optical lens comprising: a first lens component comprising at least one first optic; a second lens part including a second barrel and at least one second lens mounted on the second barrel, and the at least one second lens and the at least one first lens together constitute an imageable optical system, wherein at least a portion of an outer side surface of a bottommost second lens of the at least one second lens is exposed to an outside of the second barrel, and a top surface of the bottommost second lens is abutted against a bottom surface of the second barrel; and a connecting medium adapted to fix the first lens part and the second lens part together.

According to another aspect of the present application, there is further provided an image capturing module, including the optical lens described in any of the foregoing embodiments.

According to another aspect of the present application, there is also provided an optical lens assembly method including a first lens part including a first barrel and at least one first lens installed in the first barrel, and a second lens part including a second barrel and at least one second lens installed in the second barrel, wherein the optical lens assembly method includes: pre-positioning the first lens component and the second lens component separately from each other such that the at least one second lens and the at least one first lens together form an imageable optical system; adjusting and determining a relative position of the first lens component and the second lens component based on active calibration, wherein at least a portion of an outer side surface of a bottommost second lens of the at least one second lens is exposed outside the second barrel, and a top surface of the bottommost second lens bears against a bottom surface of the second barrel; and bonding the first lens part and the second lens part through a glue material, wherein the glue material is cured and then supports and fixes the first lens part and the second lens part so as to keep the relative positions of the first lens part and the second lens part at the relative positions determined through active calibration.

Compared with the prior art, the one or more technical schemes have at least one of the following beneficial effects:

1. the size of the optical lens in the direction perpendicular to the optical axis can be effectively reduced on the premise of the established optical design, and the imaging quality of the optical lens can be ensured.

2. The size of the lens barrel in the direction perpendicular to the optical axis can be reduced to the greatest extent on the premise of the established optical design.

3. The size of the lens barrel in the direction perpendicular to the optical axis can be reduced, the structural strength of the optical lens can be enhanced, and the reliability of the optical lens can be ensured.

According to another aspect of the present application, there is also provided an optical lens including: a first lens part including a first barrel and at least one first lens mounted within the first barrel; a second lens component including a second barrel and at least one second lens mounted within the second barrel, the at least one second lens and the first lens together constituting an imageable optical system, and the first barrel being of a different material than the second barrel; and a first glue material positioned in a first gap between the first lens component and the second lens component, wherein the first glue material is suitable for supporting and fixing the first lens component and the second lens component after solidification, and an included angle which is different from zero is formed between the axes of the first lens component and the second lens component.

According to another aspect of the present application, there is also provided an optical lens assembly method including a first lens part including a first barrel and at least one first lens installed in the first barrel, and a second lens part including a second barrel and at least one second lens installed in the second barrel, wherein the first barrel is made of a material different from that of the second barrel. The optical lens assembly method comprises the following steps: pre-positioning the first lens component and the second lens component such that the at least one first lens and the at least one second lens together form an imageable optical system; actively calibrating 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 bonding the first lens part and the second lens part to support and fix the relative positions of the first lens part and the second lens part.

1. the variation of the first lens component can be reduced, so that the difference between the state of the optical system after the first adhesive is cured and the state of the optical system determined by active calibration can be reduced, and the imaging quality of the lens or the module can be further ensured.

2. The expansion amount of the inner side surface of the first lens barrel from outside to inside and the expansion amount of the outer side surface of the first lens from inside to outside can be mutually reduced (or eliminated) through the material selection of the first lens barrel, so that the deformation of the first lens component caused by heating (for example, baking) is reduced, and the imaging quality of the lens or the module is further ensured.

3. The difference between the state of the optical system after the first glue material is solidified and the state of the optical system determined by active calibration can be reduced by reducing the shape variation or the position deviation of the first lens barrel caused by moisture accumulation, so that the imaging quality of the lens or the module is ensured.

4. The deformation of the optical surface of the first lens caused by the clamping of the external shooting mechanism can be restrained, the difference between the state of the optical system after the first adhesive material is solidified and the state of the optical system determined by active calibration can be reduced, and the imaging quality of the lens or the module can be further guaranteed.

According to another aspect of the present application, there is also provided an optical lens including a first lens part including a first lens having a first optical zone for optical imaging and a first structural zone other than the first optical zone; a second lens part including a second barrel and at least one second lens mounted on the second barrel, the at least one second lens and the first lens together constituting an imageable optical system, the second lens having a second optical zone for optical imaging and a second structural zone other than the second optical zone, the second structural zone and the second barrel constituting a structural zone of the second lens part, and a first gap being provided between a top surface of the structural zone of the second lens part and a bottom surface of the first structural zone; and the first adhesive material is positioned in the first gap, extends outwards along the top surface of the structural area of the second lens component and surrounds the first structural area, and at least one part of the outer side surface of the first structural area is wrapped by the first adhesive material which extends outwards.

According to another aspect of the present application, there is further provided an image capturing module, including the optical lens described in any one of the foregoing embodiments.

According to another aspect of the present application, there is also provided an optical lens assembly method, including: preparing a first lens part and a second lens part separated from each other, wherein the first lens part includes a first lens having a first optical zone for optical imaging and a first structural zone other than the first optical zone, the second lens part includes a second barrel and at least one second lens installed inside the second barrel, the second lens has a second optical zone for optical imaging and a second structural zone other than the second optical zone, and the second structural zone and the second barrel constitute the structural zone of the second lens part; pre-positioning the first lens component and the second lens component such that the first lens and the at least one second lens together form an imageable optical system; adjusting and determining the relative positions of the first lens component and the second lens component based on active calibration; and bonding the first lens and the second lens part through a first adhesive, wherein a first gap is formed between the top surface of the structural area of the second lens part and the bottom surface of the first structural area, the first adhesive is positioned in the first gap and extends outwards along the top surface of the structural area of the second lens part to surround the first structural area, at least one part of the outer side surface of the first structural area is wrapped by the first adhesive which extends outwards, and the first adhesive is solidified to fix and keep the first lens and the second lens part in the relative position determined by active calibration.

According to another aspect of the present application, there is also provided an assembling method of a camera module, including: assembling an optical lens by using the optical lens assembling method; and manufacturing the image pickup module based on the assembled optical lens.

Compared with the prior art, one or more embodiments of the present application have at least one of the following technical effects:

1. the resolution of the actual product of the optical lens (or the camera module) based on the active calibration can be promoted to be closer to that obtained by the active calibration by wrapping the side surface of the first lens with the first adhesive (adhesive bonding the first lens component and the second lens component).

2. The diaphragm can be formed by covering the first lens barrel on the first lens, and the appearance of the optical lens barrel is more regular and beautiful.

3. The first lens position deviation or deformation caused by the variation of the first lens barrel can be restrained, so that the resolution of an actual product of the optical lens (or the camera module) based on the active calibration is enabled to be closer to that obtained by the active calibration.

4. The gaps between the outer side surface and the top surface of the first lens and the first lens barrel can be completely filled with the adhesive material, so that the first lens is not deformed or displaced due to gas expansion in the baking process.

5. Deformation or displacement of the first lens due to gas expansion during baking can be avoided by the vent design.

6. The error of drawing glue caused by careless operation (such as careless forming of the second glue material into a completely closed ring shape) can be reduced by the air escape groove, which is beneficial to improving the yield in mass production.

7. The first adhesive material can wrap the side surface of the first lens and/or cover the top surface of the structural area of the first lens only through single adhesive drawing, so that the process steps are reduced.

Drawings

Exemplary embodiments are illustrated in referenced figures. 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 1000 according to one embodiment of the present application;

FIG. 2 illustrates a schematic perspective view of a bottommost second lens 230 in one embodiment of the present application;

FIG. 3 illustrates a schematic cross-sectional view of a bottommost second lens 230 in one embodiment of the present application;

FIG. 4 illustrates a top schematic view of a bottommost second lens 230 according to one embodiment of the present application;

fig. 5 shows a bottom view of the second barrel 210 corresponding to fig. 4;

fig. 6 is a schematic cross-sectional view of an optical lens after the bottom surface 210A of the second lens barrel 210 is bonded to the bottommost second lens 230 according to an embodiment of the present application;

FIG. 7 illustrates a top schematic view of a bottommost second lens 230 according to another embodiment of the present application;

fig. 8A shows a bottom view of the second barrel 210 corresponding to fig. 7;

fig. 8B shows a schematic cross-sectional view of the second barrel 210 taken along the section line A-A' shown in fig. 8A;

fig. 8C shows a schematic view of the bottommost second lens 230 inserted into the second barrel 210 shown in fig. 8B;

FIG. 9 shows a schematic top view of a bottommost second lens 230 according to yet another embodiment of the present application;

fig. 10 shows a bottom view of a second barrel 210 according to still another embodiment of the present application;

fig. 11A to B illustrate a process of assembling the first lens part 100 in one embodiment of the present application;

fig. 12A to D illustrate a process of assembling the second lens component 200 in one embodiment of the present application;

13A-B illustrate an active calibration and bonding process of one embodiment of the present application;

FIG. 14A illustrates relative position adjustment in active calibration in one embodiment of the present application;

FIG. 14B illustrates rotational adjustment in active calibration in accordance with another embodiment of the present application;

FIG. 14C illustrates relative position adjustment with increased v, w direction adjustment in active calibration of yet another embodiment of the present application;

FIG. 15 illustrates a top schematic view of a bottommost second lens according to one embodiment of the present application;

FIG. 16 illustrates a schematic cross-sectional view of an optical lens of an embodiment of the present application;

FIG. 17 is a schematic cross-sectional view of an optical lens according to another embodiment of the present application;

FIG. 18 is a schematic cross-sectional view of an optical lens according to yet another embodiment of the present application;

fig. 19A to 19G illustrate an optical lens assembly method in one embodiment of the present application;

fig. 20A to 20F illustrate an optical lens assembly method in another embodiment of the present application;

FIG. 21A illustrates relative position adjustment in active calibration in one embodiment of the present application;

FIG. 21B illustrates rotational adjustment in active calibration in accordance with another embodiment of the present application;

FIG. 21C illustrates relative position adjustment with increased v, w direction adjustment in active calibration of yet another embodiment of the present application;

FIG. 22 shows a schematic cross-sectional view of an optical lens of an embodiment of the present application;

FIG. 23 shows a schematic view of the addition of a first glue 300 to wrap around all outer sides 1014 of the first structural region 1012 and to cover the top surface 1015 of the first structural region 1012 on the basis of FIG. 1;

FIG. 24 is a schematic illustration of the intermediate of FIG. 23 being baked to permanently cure and integrate all of the first glue 300;

FIG. 25 is a schematic cross-sectional view of an optical lens according to another embodiment of the present application;

FIG. 26 shows a schematic view of the addition of a first glue 300 to wrap around all the outer sides of the first structural regions 1012 and cover the top surface of the first structural regions 1012 on the basis of FIG. 25;

FIG. 27 is a schematic illustration of the intermediate of FIG. 26 being baked to permanently cure and integrate all of the first glue 300;

FIG. 28 shows a schematic cross-sectional view of an optical lens according to yet another embodiment of the present application;

FIG. 29 shows a schematic view of the addition of a first glue 300 to wrap around all outer sides 1014 of the first structural region 1012 and to cover the top surface 1015 of the first structural region 1012 on the basis of FIG. 28;

FIG. 30 is a schematic view showing the semi-finished product shown in FIG. 29 being baked to permanently cure and integrate all of the first glue material 300;

FIG. 31 is a schematic illustration of the first lens 101 after the outer periphery of the first adhesive 300 and the top surface 1015 of the first structural region 1012 of the first lens 101 are coated in one embodiment of the present application;

fig. 32 shows a schematic view of moving the first barrel 102 over the first lens 101 and then bringing the first barrel 102 gradually closer to the first lens 101;

Fig. 33 shows a schematic view of the first barrel 102 contacting the added first adhesive 300;

fig. 34 shows a schematic view of the first adhesive 300 filling the gap between the outer side 1014 and top 1015 of the first lens 101 and the first barrel 102;

FIG. 35 shows a schematic cross-sectional view of an optical lens according to yet another embodiment of the present application;

FIG. 36A is a schematic cross-sectional view of an optical lens according to yet another embodiment of the present application;

FIG. 36B shows a modified first lens 101;

FIG. 37 shows the green state after completion of step S402 in one embodiment of the present application;

FIG. 38 is a schematic view of exposing the semi-finished product of FIG. 16 to pre-cure a first paste 300 according to one embodiment of the present application;

fig. 39 is a schematic cross-sectional view illustrating a second adhesive 500 drawn on the top surface of the second barrel 202 according to an embodiment of the present disclosure;

fig. 40A shows a schematic top view of the top surface of an exemplary second barrel 202;

FIG. 40B shows an enlarged partial schematic view of the section AA' of FIG. 40A;

fig. 41A shows a schematic diagram of drawing a glue on the top surface of the second barrel 202 in one embodiment of the present application;

FIG. 41B shows an enlarged partial schematic view of the section AA' of FIG. 41A;

FIG. 42 shows a schematic diagram of moving a first barrel 102 over the first lens 101 and then bringing the first barrel 102 gradually closer to the first lens 101 in one embodiment of the present application;

fig. 43 is a schematic view showing a second adhesive 500 added to the bottom surface of the first barrel 102 in contact with the first lens barrel in one embodiment of the present application;

FIG. 44 is a schematic diagram of exposing a second photoresist 500 according to one embodiment of the present application;

FIG. 45 illustrates a green state after pre-curing is completed in one embodiment of the present application;

FIG. 46A is a schematic cross-sectional view of an optical lens according to still another embodiment of the present application;

FIG. 46B illustrates a first lens 101 in yet another embodiment of the present application;

FIG. 47 is a schematic view showing a first adhesive drawn on a top surface of a structural region of a second lens component according to another embodiment of the present application;

FIG. 48 illustrates a first glue pattern for a broken glue in one embodiment of the present application;

FIG. 49 shows a jaw arrangement corresponding to the glue pattern shown in FIG. 48;

fig. 50 shows an example in which the first barrel interferes with the first lens;

fig. 51 shows an example of avoiding interference between the first barrel and the first lens by making the difference between the angle B and the angle a smaller than a preset threshold;

FIG. 52 is a schematic view showing the first structural region top surface being configured as an inclined surface in one embodiment of the present application;

FIG. 53A illustrates relative position adjustment in active calibration in one embodiment of the present application;

FIG. 53B illustrates rotational adjustment in active calibration in accordance with another embodiment of the present application;

FIG. 53C illustrates relative position adjustment with increased v, w direction adjustment in active calibration according to yet another embodiment of the present application.

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 these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the 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 in this specification, the expressions first, second, etc. are only used to distinguish one feature from another feature, and do not represent any limitation of the feature. 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 the object have been slightly exaggerated for convenience of explanation. The figures are merely examples and are not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, the use of "may" means "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 a table approximation, not as terms of a table level, and are intended to illustrate inherent deviations in measured or calculated values that would be recognized by one 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, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 shows a schematic cross-sectional view of an optical lens 1000 according to one embodiment of the present application. As shown in fig. 1, the optical lens 1000 includes a first lens component 100, a second lens component 200, and a first adhesive 300. The first lens part 100 includes a first barrel 110 and a first lens 120 mounted in the first barrel 110. The second lens part 200 includes a second barrel 210 and five second lenses 220 mounted on the second barrel 210. The bottommost second lens 230 includes an optical area 240 for imaging and a structural area 250 outside the optical area 240, and the top surface of the structural area 250 is supported against and adhered to the bottom surface of the second lens barrel 210, such that the outer side surface of the bottommost second lens 230 is entirely exposed outside the second lens barrel 210. Fig. 2 illustrates a schematic perspective view of a bottommost second lens 230 in one embodiment of the present application. The five second lenses 220 together with one first lens 120 constitute an imageable optical system. The first adhesive 300 may be disposed between the first lens part 100 and the second lens part 200. For example, there is a gap between the first lens part 100 and the second lens part 200 in a direction along the optical axis, and the first adhesive 300 is located at the gap. The first adhesive 300 is adapted to fix the first lens part 100 and the second lens part 200 together. For example, the first adhesive 300 is adapted to support and fix the first lens part 100 and the second lens part 200, and to maintain the relative positions of the first lens part 100 and the second lens part 200 in the relative positions determined by active calibration. The active calibration is to calibrate the relative positions of the first lens component 100 and the second lens component 200 based on the actual resolution curves measured by the actual imaging of the optical system (i.e. the five second lenses 220 and one first lens 120 together form an imageable optical system), so as to improve the imaging quality of the optical lens.

Further, fig. 3 illustrates a schematic cross-sectional view of a bottommost second lens 230 in one embodiment of the present application. Referring to fig. 3, in this embodiment, the outer side 230A of the bottommost second lens 230 may form a light shielding layer 260. The light shielding layer 260 may be formed by screen printing a light shielding material on the side 230A of the bottommost second lens 230. In another embodiment, the outer side 230A of the bottommost second lens 230 and the bottom 230B of the structural region 250 may each form a light shielding layer 260. The light shielding layer 260 may print a light shielding material on the side 230A of the bottommost second lens 230 and the bottom 230B of the structural region 250 of the second lens through a screen printing process.

The embodiment can effectively reduce the size of the optical lens in the direction perpendicular to the optical axis on the premise of the given optical design, and can also ensure the imaging quality of the optical lens.

In contrast, prior art optical lenses are typically unitary lenses. In one comparative example, the optical lens manufacturing method is: a lens barrel with a step-shaped bearing surface on the inner side is prepared in advance, and then each lens from small to large is embedded into the lens barrel piece by piece and is supported against the corresponding step-shaped bearing surface to obtain a complete optical lens. In such an optical lens, the lens barrel needs to surround one lens at the bottommost end, which is the largest in size, and the lens barrel needs to have a sufficient thickness to form a rigid support for the bottommost lens, which results in that the thickness of the lens barrel cannot be reduced infinitely.

In the above embodiments of the present application, the top surface of the structural area of the bottommost second lens is supported against and adhered to the bottom surface of the second lens barrel. In this embodiment, since the outer side surface of the bottommost second lens is exposed to the outside of the inner side surface of the lens barrel, the outer diameter of the lens barrel can be designed based on the size of the bottommost second lens, reducing the size of the lens barrel in the direction perpendicular to the optical axis relative to the aforementioned comparative example. On the other hand, with respect to manufacturing errors of the second lens component, such as assembly errors caused by the step of attaching and fixing the bottommost second lens to the bottom surface of the second barrel, the above-described embodiments of the present application can compensate by adjusting the relative positions of the first lens component and the second lens component based on active calibration, thereby obtaining high imaging quality.

Further, fig. 4 shows a schematic top view of the bottommost second lens 230 according to an embodiment of the present application, and fig. 5 shows a schematic bottom view of the second lens barrel 210 corresponding to fig. 4. Referring to fig. 4 and 5, in this embodiment, the structural region 250 may include an adhesive region 252 and a transition region 251. The bottom surface 210A of the second lens barrel 210 is adhered to the adhesion area 252 of the bottommost second lens 230. Fig. 6 is a schematic cross-sectional view of the optical lens after the bottom surface 210A of the second lens barrel 210 is bonded to the bottommost second lens 230 according to an embodiment of the present application. Wherein the bottom surface 210A of the second barrel and the top surface of the bonding area 252 of the bottommost second lens 230 are held against each other and bonded by the bonding adhesive 270. It should be noted that, for simplicity of illustration, only the bottom surface 210A of the second lens barrel is shown in fig. 5, and the step for bearing the rest of the second lenses inside the second lens barrel 210 is not shown (rest of the second lenses refer to rest of the second lenses other than the bottommost second lenses inside the second lens barrel 210).

Further, fig. 7 shows a schematic top view of a bottommost second lens 230 according to another embodiment of the present application. Referring to fig. 7, in the present embodiment, in the second lens part, the bottommost second lens 230 has an extension 253 formed to extend outwardly from a side thereof in a direction perpendicular to an axis thereof. Further, fig. 8A shows a schematic bottom view of the second barrel 210 corresponding to fig. 7, fig. 8B shows a schematic cross-sectional view of the second barrel 210 taken along a section line A-A' shown in fig. 8A, and fig. 8C shows a schematic view of the bottommost second lens 230 inserted into the second barrel 210 shown in fig. 8B. Referring to fig. 8A-C, the bottom surface 210A of the second barrel has a groove 280 and the extension 253 is inserted into the groove 280, thereby improving the connection strength of the bottommost second lens with the second barrel. As shown in fig. 7, the bottommost second lens 230 includes an optical zone 240 for imaging and a structural zone 250 outside the optical zone 240, and the extension 253 is located at the structural zone 250. Further, the bottommost second lens 230 may be fixed with the second barrel 210 by the second adhesive 270 between the extension 253 and the groove 280. In the present embodiment, the number of the extending portions 253 may be two, and the number of the corresponding grooves 280 of the bottom surface 210A of the second lens barrel is also two. Of course, in other embodiments of the present application, the number of the extension portions may be other numbers, such as three, four, five, six, etc., and correspondingly, the number of the corresponding grooves of the bottom surface of the second lens barrel may be three, four, five, six, etc. It should be noted that, for manufacturing tolerances of the second lens component, such as assembly tolerances (or referred to as assembly errors) caused by the groove in which the bottommost second lens is embedded and fixed to the bottom surface of the second lens barrel, the present embodiment can compensate by adjusting the relative positions of the first lens component and the second lens component based on active calibration, so as to obtain high imaging quality. In particular, in the present embodiment, in order to ensure the mounting accuracy of the extension portion and the corresponding groove, there is almost no adjustable amount in design, that is, the relative position of the bottommost second lens and the second lens barrel is basically determined by the positions of the extension portion and the corresponding groove, so that assembly tolerance may be brought when the bottommost second lens and the second lens barrel are assembled. However, such assembly tolerances may be compensated for by adjusting the relative positions of the first lens component and the second lens component during the active calibration phase. For example, the first lens part may be rotated relative to the second lens part (e.g., about the optical axis of the optical lens) during the active calibration phase to compensate for assembly tolerances due to the inability of the bottommost second lens to rotate relative to the second barrel (e.g., about the optical axis of the optical lens).

Further still referring to fig. 7, in one embodiment, in the bottommost second lens 230, there is a transition zone 251 between the optical zone 240 and the extension 253 at the structural zone 250. The embodiment can help to enhance the structural strength of the optical lens and ensure the reliability of the optical lens while reducing the size of the lens barrel in the direction perpendicular to the optical axis.

Further, fig. 9 shows a schematic top view of the bottommost second lens 230 according to yet another embodiment of the present application, and fig. 10 shows a schematic bottom view of the second barrel 210 according to yet another embodiment of the present application. Referring to fig. 9 and 10, in this embodiment, the areas other than the extending portion 253 of the bottommost second lens 230 are the optical zones 240, that is, the outer side 240A of the optical zone 240 of the bottommost second lens 230 is abutted against the inner side 210B of the second barrel. The embodiment can reduce the size of the lens barrel in the direction perpendicular to the optical axis to the greatest extent on the premise of the given optical design.

Further, in one embodiment, the outer side of the extension of the bottommost second lens may form a light shielding layer. The light shielding layer may be formed by screen printing a light shielding material on an outer side surface of the extension portion. In another embodiment, the outer side and the bottom surface of the bottommost second lens may each form a light shielding layer (shown with reference to fig. 3). The light shielding layer may print a light shielding material on the outer side and the bottom surface of the bottommost second lens by a screen printing process.

It should be noted that in the above-described embodiment, the number of lenses of the first lens section 100 and the second lens section 200 may be adjusted as needed. For example, the number of lenses of the first lens part 100 and the second lens part 200 may be two and four, respectively, three and three, respectively, four and two, respectively, and five and one, respectively. The total number of lenses of the whole optical lens can be adjusted as required, for example, the total number of lenses of the optical lens can be six, or can be five or seven.

It is also noted that the optical lens of the present application is not limited to two, and the number of lens components may be three or four or the like greater than two, for example. When there are more than two lens components constituting the optical lens, the adjacent two lens components can be regarded as the first lens component 100 and the second lens component 200 described above, respectively. For example, when the number of lens components of the optical lens is three, the optical lens may include two first lens components 100 and one second lens component 200 located between the two first lens components 100, and all the first lenses of the two first lens components 100 and all the second lenses of the one second lens component 200 together constitute an imageable optical system that performs active calibration. When the number of lens parts of the optical lens is four, the optical lens may include two first lens parts 100 and two second lens parts 200, and be arranged in the order of the first lens parts 100, the second lens parts 200, the first lens parts 100, the second lens parts 200 from top to bottom, and all the first lenses of the two first lens parts 100 and all the second lenses of the two second lens parts 200 together constitute an imageable optical system for active calibration. Other variations such as these are not described in detail herein.

Further, in another embodiment of the present application, an image capturing module based on the optical lens is 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 foregoing embodiments. The embodiment can effectively reduce the size of the camera module in the direction vertical to the optical axis, and can also ensure the imaging quality of the camera module. The camera module may further include a motor (or other type of optical actuator), the optical lens may be mounted in a cylindrical carrier of the motor, and a base of the motor is mounted on a top surface of the photosensitive assembly. The photosensitive assembly may include, for example, a wiring board, a photosensitive chip mounted on a surface of the wiring board, a ring-shaped support formed on or mounted on the surface of the wiring board and surrounding the photosensitive chip, and a color filter. The annular support may form a step on which the color filter is mounted. The base of the motor is arranged on the top surface of the annular supporting body.

Further, according to an embodiment of the present application, there is provided an optical lens assembly method including:

step 10, preparing a first lens part 100 and a second lens part 200 separated from each other, wherein the first lens part 100 includes a first barrel 110 and at least one first lens installed in the first barrel 110, and the second lens part 200 includes a second barrel 210 and at least one second lens installed in the second barrel 210. In this embodiment, the number of the first lenses is one. The number of second lenses is five.

Fig. 11A to B illustrate a process of assembling the first lens part 100 in one embodiment of the present application. Wherein the assembly process of the first lens component 100 includes: as shown in fig. 11A, the first barrel 110 is inverted, and the first lens 120 is inserted into the step 110A that is supported against the inner side of the first barrel 110; and as shown in fig. 11B, a gap (which may be an annular gap) between the first barrel 110 inner side 110B and the first lens outer side 120A is spot-glued (e.g., adhesive glue 110C) to fix the first lens 120 to the first barrel inner side 110B. Fig. 12A to D illustrate a process of assembling the second lens part 200 in one embodiment of the present application. The assembly process of the second lens component 200 includes: as shown in fig. 12A and 12B, the second barrel 210 is inverted, and four second lenses 220 are inserted into each stage step 210C inside the second barrel 210 one by one from small to large (this one by one insertion process may be completed using the same process as the prior art); as shown in fig. 12C and 12D, the bottom surface 210A of the second lens barrel is glued, and the fifth second lens 230 (i.e., the last second lens) is attached to the bottom surface 210A of the second lens barrel.

In another embodiment, the fifth second lens may have an extended portion, and the bottom surface of the second lens barrel may have a recess adapted thereto. When assembling the second lens part, the first four second lenses are still inserted one by one inside the second barrel, and then the extension of the fifth second lens is inserted into the adapted groove of the second barrel (see fig. 8C). The groove and the extension portion may be bonded with a glue.

Step 20, pre-positioning the first lens component 100 and the second lens component 200 such that the at least one second lens and the at least one first lens 120 together form an imageable optical system.

Step 30, adjusting and determining the relative position of the first lens component 100 and the second lens component 200 based on the active calibration.

Step 40, bonding the first lens component 100 and the second lens component 200 by using a glue material. In this step, the first lens part 100 and the second lens part 200 are supported and fixed by the cured adhesive so that the relative positions of the first lens part 100 and the second lens part 200 are maintained at the relative positions determined by the active calibration.

Further, fig. 13A-13B illustrate an active calibration and bonding process of an embodiment of the present application. In one embodiment, the glue 300 may be applied (as shown in fig. 13A) to the gap between the first lens part 100 and the second lens part 200 before performing step 30, and then step 30 is performed to adjust and determine the relative positions of the first lens part 100 and the second lens part 200. After the relative position is determined, step 40 is performed to cure the adhesive 300, thereby supporting the first lens part 100 and the second lens part 200 with the cured adhesive 300 and further maintaining the relative positions of the first lens part 100 and the second lens part 200 at the relative positions determined by the active calibration (as shown in fig. 13B). In yet another embodiment, step 30 may be performed first to adjust and determine the relative positions of the first lens component 100 and the second lens component 200. After the relative position is determined, the first lens part 100 (or the second lens part 200) is temporarily removed, then glue coating is performed, and then the first lens part 100 (or the second lens part 200) is moved back based on the determined relative position. Finally, the glue material is cured, so that the relative positions of the first lens component 100 and the second lens component 200 are kept at the relative positions determined by active calibration.

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. FIG. 14A illustrates relative position adjustment in active calibration in one embodiment of the present application. In this adjustment mode, the first lens component 100 (or the first lens 120) may be movable in 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). Wherein the z-direction is a direction along the optical axis, and the x-y direction is a direction perpendicular to the optical axis. The x and y directions are both in an adjustment plane P in which translation can be resolved into two components in the x and y directions.

Fig. 14B illustrates rotational adjustment in active calibration in accordance with another embodiment of the present application. In this embodiment, the relative position adjustment has an increased degree of rotational freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 14A. In this embodiment, the adjustment in the r-direction is a rotation in the adjustment plane P, i.e. about an axis perpendicular to the adjustment plane P.

Further, fig. 14C illustrates a relative position adjustment manner with increased v, w direction adjustment in active calibration according to yet another embodiment of the present application. Wherein 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 to form a vector angle representing the overall 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 (that is, 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 above-mentioned adjustment of the six degrees of freedom x, y, z, r, v, w may affect the imaging quality of the optical system (for example, affect the magnitude of the resolution). In other embodiments of the present application, the relative position adjustment may be by adjusting only any one of the six degrees of freedom, or may be by a combination of any two or more of them.

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

Further, in one embodiment, the active calibration further comprises: according to the measured resolving power of the optical system, the included angle of the axis of the first lens component 100 relative to the axis of the second lens component 200, that is, the adjustment in the w and v directions, is adjusted and determined. 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: the first lens part is moved in a direction perpendicular to the adjustment plane (i.e., adjustment in the z-direction), and a relative position between the first lens part and the second lens part in the direction perpendicular to the adjustment plane is determined based on a measured resolving power of the optical system (refer to a measured resolving power obtained based on an actual imaging result of the optical system).

Further, in one embodiment, in the pre-positioning step (step 20), a gap is provided between the bottom surface of the first lens component and the top surface of the second lens component; and in the bonding step (step 40), the adhesive is disposed in the gap.

Further, in one embodiment, in the preparing step (step 10), the first lens part may not have the first barrel. For example, the first lens component may be formed from a single first optic. In the pre-positioning step (step 20), a gap is provided between the bottom surface of the first lens and the top surface of the second lens component; and in the bonding step (step 40), the adhesive material is disposed in the gap. In this embodiment, the first lens may be formed of a plurality of sub-lenses that are integrally fitted to each other. In this embodiment, the side surfaces and the top surface of the non-optical surface of the first lens that is not used for imaging may form a light shielding layer. The light shielding layer may be formed by screen printing a light shielding material on the side and top surfaces of the first lens.

In one embodiment, in the active calibration step, the second lens component may be fixed, the first lens component is clamped by the fixture, and the first lens component is moved under the drive of the six-axis motion mechanism connected with the fixture, so as to realize the relative movement between the first lens component and the second lens component under the six degrees of freedom. Wherein the clamp may bear or partially bear against a side of the first lens component, thereby clamping the first lens component.

Further, in one embodiment, before step 30 is performed, a glue coating may be performed on the gap between the first lens component and the second lens component, and then step 30 is performed to adjust and determine the relative positions of the first lens component and the second lens component. After determining the relative position, step 40 is performed to cure the glue material, thereby supporting the first lens part and the second lens part with the cured glue material, and further maintaining the relative positions of the first lens part and the second lens part at the relative positions determined by active calibration. In yet another embodiment, step 30 may be performed first to adjust and determine the relative positions of the first lens component and the second lens component. After determining the relative position, the first lens part (or the second lens part) is temporarily moved away, then glue coating is performed, and then the first lens part (or the second lens part) is moved back based on the determined relative position. And finally, curing the adhesive material to enable the relative positions of the first lens component and the second lens component to be kept at the relative positions determined through active calibration.

In one embodiment, the glue may be a UV thermosetting glue, in step 40, the second lens component is fixed on a platform, the first lens component is picked up by a pick-up mechanism (for example, a clamp), the relative positions of the first lens component and the second lens component are kept at the relative positions determined by active calibration, then the UV thermosetting glue is subjected to pre-curing, then the pick-up mechanism (for example, the clamp) is released, and the pre-cured glue supports the first lens component and the second lens component, so that the first lens component and the second lens component are kept at the relative positions determined by active calibration, and then the first lens component and the second lens component which are combined together are baked, so that the UV thermosetting glue is permanently cured, and finally the optical lens product is obtained. In another embodiment, the adhesive material may also include a thermosetting adhesive and a photo-curing adhesive (such as UV adhesive), and the optical lens product is obtained by pre-curing the photo-curing adhesive by exposing the photo-curing adhesive, and then baking the first lens component and the second lens component which are combined together to permanently cure the thermosetting adhesive.

Further, according to an embodiment of the present application, there is also provided an image capturing module assembly method, including: the optical lens assembly method of any of the above embodiments is used to assemble an optical lens, and then an image capturing module is fabricated using the assembled optical lens.

Further, according to another embodiment of the present application, there is also provided another method for assembling a camera module, including:

step 100, preparing a first lens component and an image capturing module component, wherein the image capturing module component comprises a second lens component and a photosensitive module which are combined together, and the first lens component comprises a first lens barrel and at least one first lens installed in the first lens barrel, and the second lens component comprises a second lens barrel and at least one second lens installed in the second lens barrel. In this embodiment, the number of the first lenses is one. The number of second lenses is five.

In one embodiment, the first lens component and the second lens component are assembled separately. Wherein the assembly process of the first lens component comprises: the first lens barrel is inverted, and the first lens is embedded into the step which is supported against the inner side of the first lens barrel; and dispensing at a gap (which may be an annular gap) between the inner side surface of the first lens barrel and the outer side surface of the first lens barrel to fix the first lens barrel to the inner side of the first lens barrel. The assembly process of the second lens component comprises the following steps: the second lens barrel is inverted, and four second lenses are embedded into each stage of steps on the inner side of the second lens barrel from small to large one by one (the process of embedding one by one can be completed by adopting the same process as the prior art); and dispensing on the surface of the second lens cone, and attaching five second lenses (namely the last second lens) on the surface of the second lens cone. After the second lens component is assembled, the second lens component and the photosensitive module are installed (for example, the second lens component and the photosensitive module can be installed based on an HA process) together to obtain the image pickup module component.

In another embodiment, the fifth second lens may have an extended portion, and the bottom surface of the second lens barrel may have a recess adapted thereto. When assembling the second lens part, the first four second lenses are still embedded inside the second lens barrel one by one, and then the extension of the fifth second lens is embedded in the adapted groove of the second lens barrel. The recess 280 and the extension may be glued together.

Step 200, pre-positioning the first lens component and the second lens component such that the at least one second lens and the at least one first lens together form an imageable optical system.

Step 300, adjusting and determining the relative position of the first lens component and the second lens component based on the active calibration.

Step 400, bonding the first lens component and the second lens component through a glue material.

It can be seen that, compared with the previous embodiment, the second lens component and the photosensitive module are assembled together to form the image capturing module component in this embodiment, and then the image capturing module component is assembled with the first lens component, so as to obtain the complete image capturing module. The process of assembling the image capturing module component and the first lens component may also have various modifications, for example, reference may be made to the embodiments of the optical lens assembly method described above to achieve the assembly of the image capturing module component and the first lens component.

Still further, in one embodiment, the bottommost second lens may have an extension, and the extension may be widened based on the extension shown in fig. 7. Figure 15 illustrates a top view schematic of a bottommost second lens according to one embodiment of the present application. Referring to fig. 15, it can be seen that the distance between the two

sides

2531, 2532 of the extension 253 in this embodiment is equal to the diameter of the transition zone 251. Thus, in manufacturing the bottommost second lens, the desired extension 253 can be manufactured by only cutting twice, and the cutting surfaces 2533 of both cuts are planar. Therefore, the manufacturing difficulty of the bottommost second lens can be reduced, and the production efficiency is improved. In one embodiment, in the process of manufacturing the bottommost second lens shown in fig. 15, a semi-finished lens may be manufactured first, the outer side diameter of the structural area of the semi-finished lens is identical to the outer side diameter of the bottom surface of the second lens barrel, then the annular structural area of the semi-finished lens is cut twice at symmetrical positions, the cutting surface 2533 of the annular structural area is kept at a necessary safe distance D from the optical area 240 of the semi-finished lens, the cutting surfaces of the two cuts are planar and parallel to each other, and the distance from the cutting surface to the optical axis is the radius of a circular boundary line (shown by a dotted line in fig. 15) between the transition area and the extension part. After the cutting is completed, the bottommost second lens shown in fig. 15 is obtained. That is, in the present embodiment, the width of the transition region may be a safe distance for avoiding damage to the optical region due to the cutting action. Accordingly, the groove of the bottom surface of the second barrel in the present embodiment is adapted to the extension shown in fig. 15. In this embodiment, the inner side surface of the protruding portion at the bottom of the second lens barrel may be flat to fit with and bear against the cut surface shown in fig. 15, so as to improve the stability and reliability of assembling the second lens with the second lens barrel. The manufacturing process of the second lens with the extension part is concise, and the production efficiency can be improved. On the other hand, the width of the transition region in the present embodiment can be reduced to a small width (only a small safety distance is required to be provided to avoid damage to the optical region due to the cutting action), which is very helpful for reducing the dimension of the second lens barrel in the direction perpendicular to the optical axis, and at the same time, the yield required for mass production can be ensured.

Fig. 16 shows a schematic cross-sectional view of an optical lens according to an embodiment of the present application. Wherein the section is a section through the 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 adhesive 300. Wherein the first lens part 100 comprises a first lens barrel 102 and a first lens installed in the first lens barrel 102, and the first lens barrel 102 and the first lens 101 are optionally connected by using adhesive glue 103; a second lens part 200 including a second barrel 202 and four second lenses 201 mounted in the second barrel 202, the four second lenses 201 and the first lens 101 together constituting an imageable optical system, and the first barrel 102 being made of a material different from that of the second barrel 202; and a first adhesive 300 disposed in the first gap 400 between the first lens component 100 and the second lens component 200, the first adhesive 300 being adapted to support and fix the first lens 101 and the second lens component 200 after curing. In this embodiment, the first barrel 102 and the second barrel 202 are optionally connected by the first adhesive 300 to achieve connection of the first lens part 100 and the second lens part 200. The first adhesive 300 may be adapted to support and fix the first lens 101 and the second lens part 200 such that the relative position of the first lens 101 and the second lens part 200 is maintained at the relative position determined by active calibration. The difference between the coefficient of thermal expansion of the first barrel 102 and the coefficient of thermal expansion of the first lens 101 may be smaller than a first threshold. In this embodiment, the manufacturing material of the first lens barrel 102 is different from that of the second lens barrel 202, and the difference between the thermal expansion coefficient of the first lens barrel 102 and the thermal expansion coefficient of the first lens 101 is smaller than the first threshold, so that the thermal expansion coefficient between the first lens barrel 102 and the first lens 101 is kept substantially consistent, thereby helping to reduce the difference between the optical system state after the first adhesive 300 is cured and the optical system state determined by active calibration, and further ensuring the imaging quality of the lens or the module. In this embodiment, the first lens 101 and the first lens barrel 102 have approximately the same variation condition, and further have the same degree of variation under the same condition, so that the variation of the relative position is reduced, the correspondence between the first lens 101 and the first lens barrel 102 is reduced, and the weakening of the structural strength is avoided. Meanwhile, when variation occurs, the first lens 101 and the first lens barrel 102 may have the same or similar variation, and degradation of the optical system caused by variation can be reduced. Illustratively, since the first barrel 102 is annular, when the first barrel 102 expands due to heat, the inner side surface thereof will expand from outside to inside. At the same time, the outer side of the first lens 101 is heated to expand from inside to outside. Since the thermal expansion coefficient of the first lens barrel 102 is close to that of the first lens 101 (the difference between the two is controlled within the first threshold), the expansion amount of the inner side surface of the first lens barrel 102 from outside to inside is close to that of the outer side surface of the first lens 101, and thus the two expansion amounts can be mutually reduced (or eliminated), so as to reduce the deformation of the first lens component caused by heating (for example, baking), and help to reduce the difference between the optical system state after the first adhesive 300 is cured and the optical system state determined by active calibration, and further ensure the imaging quality of the lens or module.

In another embodiment, the first lens barrel 102 is made of a material with a lower moisture absorption rate than the second lens barrel 202. The moisture absorption rate is also understood herein as water absorption rate. In this embodiment, the moisture absorption rate of the material of the first lens barrel 102 may be smaller than the corresponding threshold, so that the shape variation or the position shift of the first lens barrel 102 caused by moisture accumulation may be reduced, thereby helping to reduce the difference between the state of the optical system after the curing of the first adhesive 300 and the state of the optical system determined by active calibration, and further ensuring the imaging quality of the lens or the module. While the material of the second barrel 202 is still made of a conventional material, such as a Polycarbonate (PC) material. Therefore, the second lens component can be manufactured by adopting a traditional process, and the product yield is improved.

Further, in one embodiment, the first lens 101 is optionally a glass lens. Since the glass lens has a high refractive index, the height of the optical lens or the image pickup module can be reduced. The first lens 101, for example, of glass material, allows the height of the optical lens to be reduced, conforming to the current trend of thinner and thinner mobile phones.

Further, in one embodiment, the first barrel 102 has elasticity to buffer the force of the external uptake mechanism on the first lens 101. Here, the first barrel 102 has elasticity, which may be understood as a material elastic modulus of the first barrel is smaller than a material elastic modulus of the first lens. The smaller the modulus of elasticity of a material means the more elastic the material is. That is, the lower the modulus of elasticity, the greater the relative deformation of the material under the same stress conditions, and the better the flexibility of the material to deform.

Further, in a preferred embodiment, the difference between the coefficient of thermal expansion of the first barrel 102 and the coefficient of thermal expansion of the first lens 101 is less than a first threshold, and the moisture absorption rate of the first barrel 102 is less than the moisture absorption rate of the second barrel 202.

Further, in a preferred embodiment, the difference between the thermal expansion coefficient of the first lens barrel 102 and the thermal expansion coefficient of the first lens 101 is smaller than a first threshold, the moisture absorption rate of the first lens barrel 102 is smaller than the moisture absorption rate of the second lens barrel 202, and the material of the first lens barrel 102 further has elasticity for buffering the acting force of the external ingestion mechanism on the first lens 101. In this embodiment, the first barrel 102 having elasticity is located between the first lens 101 and the external taking mechanism, and can play a role of buffering when the external taking mechanism moves the first lens 101, thereby suppressing deformation of the optical surface of the first lens 101 due to the pinching by the external taking mechanism.

Further, on the basis of the above embodiment, the number of the first lenses 101 may be smaller than the number of the second lenses 201, and the second lenses 201 may be closer to the photosensitive chip than the first lenses 101. Further, in one embodiment, the number of the first lenses 101 is one, and the outer diameter of the first lens 101 is larger than the second lens 201 having the smallest outer diameter. In this embodiment, the outer diameter of the first lens 101 is larger than the outer diameter of the smallest second lens 201, and the reason for adopting this technical solution is that since the first barrel 102 is made of an unconventional material, an additional tolerance may be introduced. Thus, the assembly tolerance is reduced by reducing the number of first lenses 101, designing a larger first lens 101, etc. (because in general, the smaller and more compact the tolerance is, the more difficult it is to control) and the assembly tolerance is compensated for by the active calibration technique, thereby ensuring the overall imaging quality of the optical lens or module.

Further, in some embodiments, the second barrel 202 may be made of a conventional material, such as a Polycarbonate (PC) material. Therefore, the second lens component can be manufactured by adopting the traditional process, which is beneficial to improving the product yield and the production efficiency.

Further, fig. 17 shows a schematic cross-sectional view of an optical lens according to another embodiment of the present application. Wherein the section is a section through the optical axis of the optical lens. In this embodiment, the first adhesive 300 is located between the first lens 101 and the second lens barrel 202, and no filler is located between the first lens barrel 102 and the second lens barrel 202. The first adhesive 300, which is different from fig. 16, is located between the first barrel 102 and the second barrel 202, but is located between the first lens 101 and the second barrel 202. The present embodiment may help the optical system state of the finished optical lens (or image capturing module) to be closer to the state determined in the active calibration stage, for the following reasons: in the active calibration stage, the external clamp captures and moves the first lens component 100 by clamping the first lens barrel 102, but the elastic first lens barrel 102 can buffer the acting force of the clamp on the first lens 101, so as to prevent the deformation of the first lens 101, and further prevent the inconsistent optical system state of the active calibration stage (when the first lens component 100 is clamped by the clamp) and the stage after the first adhesive 300 is cured (when the first lens component 100 is not clamped by the clamp). Further, the deformation of the elastic first lens barrel 102 may affect the state of the optical system, and the connection between the first lens 101 and the second lens barrel 202 through the first adhesive 300 is adopted, so that the defect can be effectively avoided.

Further, fig. 18 shows a schematic cross-sectional view of an optical lens according to still another embodiment of the present application. Wherein the section is a section through the optical axis of the optical lens. The present embodiment is substantially identical to the embodiment of fig. 16, except that the first adhesive 300 is located between the first barrel 102 and the second barrel 202 and between the first lens 101 and the second barrel 202.

Further, in another embodiment of the present application, an image capturing module based on the optical lens is 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 foregoing embodiments. The embodiment can reduce the secondary variation of the optical system of the camera module after the active calibration is completed, thereby ensuring the imaging quality of the camera module and improving the yield in mass production. In some embodiments, the camera module may further include a motor (or other type of optical actuator), and the optical lens may be mounted within a cylindrical carrier of the motor, with a base of the motor mounted to a top surface of the photosensitive assembly. The photosensitive assembly may include, for example, a wiring board, a photosensitive chip mounted on a surface of the wiring board, a ring-shaped support formed on or mounted on the surface of the wiring board and surrounding the photosensitive chip, and a color filter. The annular support may form a step on which the color filter is mounted. The base of the motor is arranged on the top surface of the annular supporting body.

According to an embodiment of the present application, there is also provided an optical lens assembly method including:

step S10, a preparation step. The first lens part 100 and the second lens part 200 separated from each other are prepared. Wherein the first lens part 100 includes a first barrel 102 and a first lens 101 mounted within the first barrel 102; the second lens part 200 includes a second barrel 202 and four second lenses 201 mounted in the second barrel 202, the four second lenses 201 and the first lens 101 together constitute an imageable optical system, and the first barrel 102 is made of a material different from the second barrel 202.

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

Step S30, actively calibrating. The relative positions of the first lens component 100 and the second lens component 200 are adjusted and determined based on active calibration.

Step S40, a bonding step. The first lens part 100 and the second lens part 200 are bonded by a first adhesive 300. The first adhesive 300 is located in the gap between the first lens component 100 and the second lens component 200. After the first adhesive 300 is cured, the first lens component 100 and the second lens component 200 are fixed and kept at the relative positions determined by active calibration.

In this embodiment, the material of the first lens barrel 102 is selected to protect the first lens 101, so as to reduce the second variation of the shape and position of the first lens 101 after the active calibration is completed. Specifically, the second variation refers to a change in the optical system after baking and curing relative to the optical system determined by active calibration.

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. FIG. 21A illustrates relative position adjustment in active calibration in one embodiment of the present application. In this adjustment mode, the first lens component 100 (or the first lens 101) may be movable in 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). Wherein the z-direction is a direction along the optical axis, and the x-y direction is a direction perpendicular to the optical axis. The x and y directions are both in an adjustment plane P in which translation can be resolved into two components in the x and y directions.

Fig. 21B illustrates rotational adjustment in active calibration according to another embodiment of the present application. In this embodiment, the relative position adjustment has an increased degree of rotational freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 21A. In this embodiment, the adjustment in the r-direction is a rotation in the adjustment plane P, i.e. about an axis perpendicular to the adjustment plane P.

Further, fig. 21C illustrates a relative position adjustment manner with increased v, w direction adjustment in active calibration according to yet another embodiment of the present application. Wherein 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 to form a vector angle representing the overall 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 (that is, 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 above-described adjustment of x, y, z, r, v, w in six degrees of freedom may affect the imaging quality of the optical train (e.g., affect the magnitude of the resolution). In other embodiments of the present application, the relative position adjustment may be by adjusting only any one of the six degrees of freedom, or may be by a combination of any two or more of them.

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

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

In one embodiment, in the active calibration step, the second lens component 200 may be fixed, the first lens component 100 is clamped by the fixture, and the first lens component 100 is moved under the drive of the six-axis motion mechanism connected with the fixture, so as to implement the relative movement between the first lens component 100 and the second lens component 200 in the six degrees of freedom. Wherein the clamp may bear or partially bear against the side of the first lens part 100, thereby clamping the first lens part 100.

Further, fig. 19A to 19G illustrate an optical lens assembly method in one embodiment of the present application. Fig. 19A shows the first lens component 100 and the second lens component 200 in a separated state, and the arrow indicating direction shows the moving direction of the first lens component 100. Fig. 19B shows a schematic diagram of pre-positioning and actively calibrating the first lens component 100 and the second lens component 200. Specifically, the first lens component 100 and the second lens component 200 are pre-positioned, the first lens 101 and the four second lenses 201 together form an optical system capable of imaging, the six-axis coordinates of the first lens component 100 are adjusted by an external capturing mechanism, the measured imaging quality is up to standard (for example, the measured resolution is up to a threshold), and then the six-axis coordinate position of the first lens component 100, which is up to standard, is recorded. Fig. 19C shows a schematic diagram of the second barrel 202 after active calibration. Specifically, after the active calibration is completed, the first lens component 100 is removed, and then the first adhesive 300 is coated on the top surface of the second lens barrel 202 of the second lens component 200 for connecting the first lens component 100 and the second lens component 200, and an arrow in the figure indicates that the first lens component 100 is removed. Fig. 19D shows that after the first paste 300 is applied to the top surface of the second barrel 202 of the second lens component 200, the external uptake mechanism restores the first lens component 100 to the calibration position according to the six-axis coordinate position (i.e., the recorded six-axis coordinate position) determined by the active calibration. Fig. 19E illustrates the pre-cure process. Specifically, after the first lens component 100 is moved to the calibration position, the first adhesive 300 is exposed, the first adhesive 300 is pre-cured, and the external uptake mechanism holds the first lens component 100 in the calibration position during the exposure. The arrows in fig. 19E are used for the light exposing the first glue 300. Fig. 19F shows a state after the first adhesive 300 is cured. After the exposure, the external take-up mechanism is moved away, and the first lens component 100 is held in the calibration position by the support and fixation of the pre-cured first adhesive 300. Fig. 19G shows a state after permanent curing. The optical lens after the pre-curing of the first adhesive 300 is baked, and thus permanent curing can be achieved. In fig. 19G, the first adhesive 300 is baked to permanently connect the first lens component 100 and the second lens component 200 and remain in the active calibration position shown in fig. 19B.

In this embodiment, the first adhesive 300 is painted between the top surface of the second lens barrel 202 and the bottom surface of the first lens barrel 102, wherein a gap is maintained between the first lens 101 and the second lens barrel 202; optionally, the first adhesive 300 may be painted between the bottom surface of the first lens 101 and the top surface of the second lens barrel 202, where a gap is maintained between the first lens barrel 102 and the second lens barrel 202; alternatively, the first adhesive 300 may be painted between the first lens barrel 102 and the top surface of the second lens barrel 202, and between the bottom surface of the first lens 101 and the top surface of the second lens barrel 202.

Further, fig. 20A to 20F illustrate an optical lens assembly method in another embodiment of the present application. Fig. 20A shows a schematic view of the second lens barrel 202 of the second lens component 200 having a first adhesive 300 on the top surface thereof, wherein the first adhesive 300 is coated on the top surface of the second lens barrel 202 of the second lens component 200 for connecting the first lens component 100 and the second lens component 200. Fig. 20B shows a schematic diagram of clamping and moving the first lens component 100 for pre-positioning, wherein after the first adhesive 300 is coated on the top surface of the second lens barrel 202 of the second lens component 200, the first lens component 100 and the second lens component 200 are pre-positioned by using active calibration, so that the first lens 101 and the at least one second lens 201 together form an optical system capable of imaging, the six-axis coordinates of the first lens component 100 are adjusted by an external ingestion mechanism, so that the measured imaging quality reaches the standard (for example, the measured imaging force reaches the threshold), and the first lens component 100 is moved to the six-axis coordinate position reaching the imaging quality, and the moving direction of the first lens component 100 is indicated by an arrow. Fig. 20C shows a schematic diagram after the first lens component 100 is moved to the calibration position using active calibration, in which a first adhesive 300 is contained between the first lens component 100 and the second lens component 200, and is held in the calibration position with an external uptake mechanism. Fig. 20D shows a schematic view of exposing the first adhesive 300 to pre-cure, wherein after the first lens component 100 is moved to the first adhesive 300 painted on the top surface of the second barrel 202 of the second lens component 200, the first adhesive 300 is simultaneously maintained at the calibration position, and then exposing the first adhesive 300 to pre-cure the first adhesive 300, thereby maintaining the first lens component 100 at the calibration position. Fig. 20E shows a state after the first adhesive 300 is cured. After the first adhesive 300 is exposed, the external pick-up mechanism is moved away, and the first lens component 100 is kept in the schematic view of the calibration position. Fig. 20F shows a state after permanent curing. The optical lens pre-cured by the first adhesive 300 is baked to achieve permanent curing. In fig. 20F, the first adhesive 300 is baked to permanently connect the first lens component 100 and the second lens component 200 and remain in the active calibration position shown in fig. 20C.

Further, the applicant further analyzed the coefficients of thermal expansion, moisture absorption, and elastic modulus of various materials, and based on the analysis, a series of preferred embodiments were derived.

Wherein the moisture absorption rate, which may also be referred to as water absorption rate, indicates the ability of the material to absorb water at standard atmospheric pressure. Table 1 gives the water absorption of some plastics materials.

TABLE 1

Referring to table 1, in some embodiments of the present application, the first barrel may employ a material having a water absorption of less than 0.3%, such AS LCP, FR-PET, PI, PBT, PE, PP, PPO, PEI, AS, or the like. In addition, since the water absorption rate of the metal material is generally less than 0.3%, the first barrel may also be made of the metal material. The first lens barrel is made of a material with the water absorption rate smaller than 0.3%, so that shape variation or position deviation of the first lens barrel caused by moisture accumulation can be reduced, the difference between the state of an optical system after the first adhesive material is solidified and the state of the optical system determined by active calibration can be reduced, and the imaging quality of a lens or a module can be further guaranteed. While the material of the second barrel 202 is still made of a conventional material, such as PC material. Therefore, the second lens component can be manufactured by adopting the traditional process, which is beneficial to improving the product yield and the production efficiency.

The polymer material and the metal material are isotropic in three dimensions, and thus the coefficients of thermal expansion are both linear expansion coefficients.

In one embodiment of the present application, the first lens may be made of a glass material, and the first barrel may be made of a metal material.

In general, the coefficient of thermal expansion of a glass material is, for example: (5.8-150). Times.10 ^-7 /℃。

Some common industrial metallic materials have the following coefficients of thermal expansion:

copper 1.7X10 ^-5 /℃，

Aluminum: 2.3X10 ^-5 /℃，

Iron: 1.2X10 ^-5 /℃，

General carbon steel: 1.3X10 ^-5 /℃。

Glass is smaller than plastic in thermal expansion coefficient, and metal lens barrel is also smaller than plastic in thermal expansion coefficient in general, so that the combination of glass lens and metal lens barrel is adopted to help reduce deformation of the first lens component caused by heating (such as baking), and the metal lens barrel has smaller water absorption rate, so that shape variation or position deviation of the first lens barrel caused by moisture accumulation can be reduced.

Further, in a preferred embodiment of the present application, oxygen-free copper may be used as the first barrel material. The thermal expansion coefficient of the oxygen-free copper is 1.86 multiplied by 10 ^-7 Per DEG C, and adopts high borosilicate glass as the firstA lens material. The thermal expansion coefficient of the high borosilicate glass is as follows: (3.3.+ -. 0.1). Times.10 ^-6 and/C. The thermal expansion coefficients of the two materials are close, deformation of the first lens component caused by heating (for example, baking) can be reduced, and the first lens barrel shape variation or position deviation caused by moisture accumulation can be reduced due to the small water absorption rate of oxygen-free copper. Therefore, the solution of the present embodiment is very helpful for reducing the difference between the optical system state after the first adhesive is cured and the optical system state determined by active calibration, so as to further ensure the imaging quality of the lens or the module.

In another embodiment of the present application, the first lens and the first barrel are both made of plastic materials. The first lens barrel can be made of first plastic, and the first lens can be made of second plastic. The difference in thermal expansion coefficients of the first plastic and the second plastic is, for example, 4×10 ^-5 within/deg.C.

Materials for common plastic lenses include: PC or PMMA (polymethyl methacrylate), commonly known as plexiglas or acryl.

Wherein, PMMA thermal expansion coefficient is: 7X 10 ^-5 /℃，

The thermal expansion coefficient of PC is: (6.5-6.6). Times.10 ^-5 /℃。

In some cases, the lenses may also be made of a resin material, such as CR-39 (propylene diglycol carbonate, also known as Columbia resin or ADC resin), having a coefficient of thermal expansion of: 9 to 10 multiplied by 10 ^-5 /℃。

Table 2 further shows the coefficients of thermal expansion of some plastics.

TABLE 2

Material name	Coefficient of linear expansion (DEG C-1)
		PE (Medium Density)	10×10^-5
PC	(5～7)×10＾-5
		PBT	110^-5
PE (high density)	22×10^-5；
		PPO(NORYL)	0.7×10＾-5
PP polypropylene	(5.8～10.2)10＾-5
		PEI	5.6×10＾-5

In Table 2, the symbol "≡" represents the power, e.g. "10-5" represents "10- ^-5 ”。

Further, in some embodiments of the present application, the elasticity of the first lens barrel may be greater than the elasticity of the first lens by selecting a material of the first lens barrel, so as to buffer the clamping force of the external clamp when the first lens barrel is clamped, thereby reducing the force indirectly acting on the first lens. Meanwhile, the good elasticity of the lens barrel can be that the first lens barrel has the effect that the shape is easy to recover after the clamp is released. Table 3 shows the elastic modulus of some barrel materials. Table 4 shows the elastic modulus of some lens materials.

TABLE 3 Table 3

Material name	Elastic modulus (GPa)
		PE (Medium/Low Density)	0.172
FR-PET	1.5-2
		POLIYIMSE	1.07
AS(ASN)	1.93
		PC	2.4-2.6
PBT	2.8
		PE (high density)	2.914
PPO(NORYL)	2.32
		PP polypropylene	4
PEI	10
		LCP	11.7

TABLE 4 Table 4

In a preferred embodiment, a first lens of PMMA material and a first barrel of medium and low density PE material (medium and low density PE material may be of a density of, for example, 0.920 to 0.940g/cm ³ Polyethylene material of (d). Thus, the first lens barrel not only has elasticity superior to that of the first lens, but also has a small water absorption rate, and the difference of the thermal expansion coefficients of the first lens barrel and the second lens barrel is, for example, 4×10 ^-5 within/deg.C. The solution of the embodiment can reduce deformation of the first lens component caused by heating (for example, baking), reduce shape variation or position deviation of the first lens barrel caused by moisture accumulation, and buffer acting force of the external uptake mechanism on the first lens through elasticity of the first lens barrel, thereby being very helpful for reducing difference between the optical system state after the solidification of the first adhesive and the optical system state determined by active calibration, and further guaranteeing imaging quality of the lens or the module. In this embodiment, the second lens barrel may be made of a conventional lens barrel material (such as a PC material), so that the second lens component may still be made of a conventional process, which is helpful for improving the product yield and improving the production efficiency. In the case of mass production (e.g., mass production of mobile phone camera modules), the throughput of the same type of camera module (or corresponding optical lens) may reach tens of millions to hundreds of millions, and thus the yield and production efficiency of the product are not negligible.

Fig. 22 shows a schematic cross-sectional view of an optical lens of an embodiment of the present application. Wherein the section is a section through the 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 adhesive 300. Wherein the first lens part 100 comprises a first lens 101, the first lens 101 having a first optical zone 1011 for optical imaging and a first structural zone 1012 outside the first optical zone 1011. A second lens component 200, including a second lens barrel 202 and four second lenses 201 mounted on the second lens barrel 202, the four second lenses 201 and the first lenses 101 together form an imageable optical system, the second lenses 201 have a second optical zone 2011 for optical imaging and a second structural zone 2012 outside the second optical zone 2011, the second structural zone 2012 and the second lens barrel 202 form a structural zone of the second lens component 200, and a first gap 400 is provided between a top surface 2021 of the structural zone of the second lens component 200 and a bottom surface 1013 of the first structural zone 1012. In this embodiment, since the second lens barrel 202 completely covers the second structural region 2012, and the top surface of the second structural region 2012 is not exposed to the outside, in this embodiment, the top surface 2021 of the structural region of the second lens component 200 is actually the top surface of the second lens barrel 202 (note that in other embodiments, the top surface 2021 of the structural region of the second lens component 200 may be formed by the top surface of the second lens barrel 202 and the top surface of the second structural region 2012 of the second lens 201). The top surface of the second lens barrel 202 is a flat surface. Note that in other embodiments, the top surface of the second lens component 200 may be constituted by the top surface of the second barrel 202 and the top surface of the second structural region 2012. Still referring to fig. 22, in the present embodiment, the first adhesive 300 is located in the first gap 400 and extends outward along the top surface 2021 of the structural area of the second lens component 200 and surrounds the first structural area 1012, and the first adhesive 300 that extends outward wraps at least a portion of the outer side 1014 of the first structural area 1012 (in the present embodiment, the first adhesive 300 does not wrap all of the outer side 1014 of the first structural area 1012). The first adhesive 300 is adapted to support and fix the first lens 101 and the second lens component 200, so that the relative positions of the first lens 101 and the second lens component 200 are maintained at the relative positions determined by active calibration.

Fig. 25 shows a schematic cross-sectional view of an optical lens according to another embodiment of the present application. Wherein the section is a section through the optical axis of the optical lens. In this embodiment, the first adhesive 300 wraps all of the outer side 1014 of the first structural region 1012. Further, fig. 28 shows a schematic cross-sectional view of an optical lens according to yet another embodiment of the present application. In the embodiment shown in fig. 28, the first glue 300 wraps around all of the outer side 1014 of the first structural region 1012 and also covers the top surface 1015 of the first structural region 1012. Applicants have found that in an optical lens assembly scheme based on active calibration techniques, the shape and position of the first lens 101 and the second lens 201 may undergo a secondary variation after the active calibration is completed. Specifically, the second variation may be, for example, a change of the optical system of the actual product (for example, the optical lens or the camera module) relative to the optical system determined by the active calibration (step 30) during the curing process or after the long-term use of the first adhesive 300. Such changes will lead to degradation of the imaging quality of the product. The applicant has further found that, with respect to the solution in which the first adhesive 300 is filled only between the bottom surface of the first lens 101 and the top surface of the second lens component 200, when the first adhesive 300 wraps the side surface of the first lens 101, the resolution of the actual product is closer to that obtained by active calibration, and therefore the design in which the first adhesive 300 wraps the side surface of the first lens 101 helps to improve the product yield.

Fig. 24 shows a schematic cross-sectional view of an optical lens according to another embodiment of the present application. Wherein the section is a section through the optical axis of the optical lens. In this embodiment, the first glue 300 is black, and covers the outer side 1014 and the top 1015 of the first structural area 1012 to form a diaphragm.

Fig. 35 shows a schematic cross-sectional view of an optical lens according to still another embodiment of the present application. Wherein the section is a section through the optical axis of the optical lens. In this embodiment, the first lens component 100 further includes a first lens barrel 102, where the first lens barrel 102 surrounds the first lens 101 and blocks the light emitted from the outside to the outer side 1014 and the top 1015 of the first structural area 1012. Further, the first adhesive 300 fills the gap between the outer side 1014 and the top 1015 of the first lens 101 and the first barrel 102.

Fig. 36A shows a schematic cross-sectional view of an optical lens according to still another embodiment of the present application. Wherein the section is a section through the optical axis of the optical lens. This embodiment is obtained by modifying the first lens 101 according to the embodiment shown in fig. 35. Fig. 36B shows a modified first lens 101. In this embodiment, the top surface 1015 of the first structural region 1012 of the first lens 101 has a glue overflow groove 1013', and the glue overflow groove 1013' is located near one end of the first optical region 1011 of the first lens 101.

Fig. 46A shows a schematic cross-sectional view of an optical lens according to still another embodiment of the present application. Wherein the section is a section through the optical axis of the optical lens. In this embodiment, the optical lens includes a first lens barrel 102, a second adhesive 500 is disposed between a bottom surface 1021 of the first lens barrel 102 and a top surface 2021 of the second lens barrel 202, and the first lens barrel 102 is adhered to the second lens barrel 202 through the second adhesive 500. A cavity 1022 is provided between the outer side 1014 and top 1015 of the first lens 101 and the first barrel 102. In this embodiment, the second lens component 200 has an air escape passage that communicates the cavity 1022 with the outside. In the present embodiment, the escape passage is formed by providing the escape groove 600 on the top surface of the second barrel 202. Fig. 40A shows a schematic top view of the top surface of an exemplary second barrel 202. Referring to fig. 40A, the top surface of the second barrel 202 has an air escape groove 600. For simplicity and clarity of illustration, the orientation and location of the escape chute 600 is only schematically shown in fig. 40A. The air escape groove 600 may be a groove along the radial direction of the second barrel 202. Further, fig. 40B shows a partially enlarged schematic view of the AA' section in fig. 40A. Referring to fig. 40B, the air escape groove 600 includes an air vent slot 601 and two glue blocking slots 602 respectively located at two sides of the air vent slot 601. Further, fig. 39 shows a schematic cross-sectional view of drawing the second glue 500 on the top surface of the second barrel 202, and fig. 41A shows a schematic drawing the glue on the top surface of the second barrel 202. It can be seen that the second adhesive 500 forms a ring shape with a notch on the top surface of the second barrel 202, and the notch is located at the position of the air escape slot 600. Fig. 41B shows a partially enlarged schematic view of the AA' section in fig. 41A. The glue blocking slot 602 accommodates the overflowed second glue material 500, so that the ventilation slot 601 is not blocked by the second glue material 500, thereby ensuring that the second glue material 500 is provided with a notch. Thus, in the baking stage, the cavity 1022 can be communicated with the outside through the vent slot 601 and the notch of the second adhesive 500, so that the dislocation or deformation of the first lens 101 caused by the air expansion in the cavity 1022 is avoided, and the imaging quality of the optical lens based on active calibration is further ensured. On the other hand, the design of the air escape groove 600 can reduce the error of drawing the glue caused by careless operation (for example, careless forming of the second glue 500 into a completely closed ring shape), which is beneficial to improving the yield in mass production.

Note that in other embodiments, the air escape passage may be provided in the first lens component 100, or may be formed by the first lens component 100 and the second lens component 200 together. The gas escape passage may include a gas escape groove 600 located at the top surface 2021 of the second barrel 202 and/or a gas escape groove 600 located at the bottom surface 1021 of the first barrel 102.

Fig. 46B shows a first lens 101 in yet another embodiment of the present application. In this embodiment, the first lens 101 in the optical lens of fig. 24 may be replaced with the modified first lens 101 shown in fig. 46B. In this embodiment, the top surface 1015 of the first structural region 1012 of the first lens 101 is inclined, and the end of the top surface 1015 of the first structural region 1012 near the first optical region 1011 is higher than the end near the outer side 1014 of the first structural region 1012. When the first adhesive 300 is disposed on the top surface 1015 of the first structural region 1012 (e.g., when the first adhesive 300 covers the top surface 1015 of the first structural region 1012), the adhesive automatically flows to the cavity 1022, so as to avoid polluting the optical region of the first lens 101 and causing poor products. In another embodiment, the first lens 101 shown in fig. 36B may be used to replace the first lens 101 in fig. 46A, so that the defective product caused by the contamination of the optical area of the first lens 101 may be avoided.

On the basis of the above embodiments, further, a corresponding image capturing module is provided, where the image capturing module may include the optical lens according to any one of the above embodiments. Specifically, the camera module may include an optical lens and a photosensitive assembly. Wherein the optical lens may be the optical lens in any of the foregoing embodiments. In this embodiment, the first adhesive 300 wraps the side surface of the first lens 101, so that the actual resolution of the produced camera module is closer to the resolution obtained by active calibration, which is helpful for improving the product yield. The camera module may further include a motor (or other type of optical actuator), the optical lens may be mounted in a cylindrical carrier of the motor, and a base of the motor is mounted on a top surface of the photosensitive assembly. Further, the photosensitive assembly may include, for example, a wiring board, a photosensitive chip mounted on a surface of the wiring board, a ring-shaped support formed on or mounted on the surface of the wiring board and surrounding the photosensitive chip, and a color filter. The annular support may form a step on which the color filter is mounted. The base of the motor is arranged on the top surface of the annular supporting body.

Step S10, a preparation step. A first lens part 100 and a second lens part 200 are prepared to be separated from each other, the first lens part 100 including one first lens 101, the first lens 101 having a first optical zone 1011 for optical imaging and a first structural zone 1012 other than the first optical zone 1011, the second lens part 200 including a second lens barrel 202 and four second lenses 201 mounted in the second lens barrel 202, the four second lenses 201 having a second optical zone 2011 for optical imaging and a second structural zone 2012 other than the second optical zone 2011, and the second structural zone 2012 and the second lens barrel 202 constituting the structural zone of the second lens part 200.

Step S20, pre-positioning step. Second lens part 200 the first lens part 100 and the second lens part 200 are pre-positioned such that the first lens 101 and the four second lenses 201 together form an imageable optical system.

Step S40, a bonding step. The first lens 101 and the second lens component 200 are bonded by a first adhesive 300, wherein a first gap 400 is formed between a top surface of a structural area of the second lens component 200 and a bottom surface of the first structural area 1012, the first adhesive 300 is located in the first gap 400 and extends outwards along the top surface of the structural area of the second lens component 200 and surrounds the first structural area 1012, and the first adhesive 300 extending outwards wraps at least a part of an outer side surface of the first structural area 1012, and the first adhesive 300 fixes and maintains the first lens 101 and the second lens component 200 in a relative position determined by active calibration after being cured. Fig. 22 is a schematic cross-sectional view of an optical lens according to an embodiment of the present application, and it can be seen that, in the embodiment shown in fig. 22, the first adhesive 300 does not cover all of the outer side 1014 of the first structural area 1012. Fig. 25 is a schematic cross-sectional view of an optical lens according to another embodiment of the present application, where the first adhesive 300 wraps all the outer sides 1014 of the first structural regions 1012 in the embodiment shown in fig. 25. Fig. 28 is a schematic cross-sectional view of an optical lens according to another embodiment of the present application, where in the embodiment shown in fig. 28, the first adhesive 300 wraps all of the outer side 1014 of the first structural region 1012 and covers a portion of the top 1015 of the first structural region 1012.

Applicants have found that in an optical lens assembly scheme based on active calibration techniques, the shape and position of the first lens 101 and the second lens 201 may undergo a secondary variation after the active calibration is completed. Specifically, the second variation may be, for example, a change of the optical system of the actual product (for example, the optical lens or the camera module) relative to the optical system determined by the active calibration (step 30) during the curing process or after the long-term use of the first adhesive 300. Such changes will lead to degradation of the imaging quality of the product. The applicant has further found that, with respect to the solution in which the first adhesive 300 is filled only between the bottom surface of the first lens 101 and the top surface of the second lens component 200, when the first adhesive 300 wraps the side surface of the first lens 101, the resolution of the actual product is closer to that obtained by active calibration, and therefore the design in which the first adhesive 300 wraps the side surface of the first lens 101 helps to improve the product yield.

Further, in one embodiment, the bonding step (step S40) includes:

s401, a glue drawing step. A first glue material 300 in liquid state is arranged on the top surface 2021 of the structural area of the second lens component 200.

S402, positioning based on an active calibration result. The first lens 101 is moved above the second lens component 200, then gradually approaches the second lens component 200 and contacts the first adhesive 300, and the relative position of the first lens 101 and the second lens component 200 is adjusted to the relative position determined by active calibration, wherein the arranged liquid first adhesive 300 is at least located in the first gap 400.

S403, a pre-curing step. After S402 is completed, the first glue 300 is pre-cured. During the pre-curing process, the first lens 101 and the second lens part 200 are maintained in the relative position determined by active calibration by means of an external uptake mechanism and/or a fixed platform. For example, an external uptake mechanism (e.g., a jig) uptake the first lens 101, and the fixing platform fixes the second lens part 200. The external ingestion mechanism may be adjustable in multiple degrees of freedom (e.g., six axis adjustment). After pre-curing, the first lens 101 and the second lens component 200 are maintained in the relative position determined by active calibration by means of the pre-cured first adhesive 300. Further, in one embodiment, the pre-curing step may be an exposure process of the first glue 300.

S404, a permanent curing step. And (3) permanently curing the first adhesive 300 to obtain the finished optical lens product. In one embodiment, the permanently curing may be baking the pre-cured combination of the first adhesive 300, the first lens 101 and the second lens part 200, such that the first adhesive 300 is permanently cured.

Note that in one embodiment, the order of step S401 and step S30 may be interchanged, and step S30 may be performed in combination with step S402.

Further, in an embodiment, in step S402, the disposed liquid first glue 300 may be located only in the first gap 400. Between the steps S403 and S404, a liquid first adhesive 300 may be further added to the periphery of the pre-cured first adhesive 300, so that the first structural area 1012 of the first lens 101 is wrapped by the first adhesive 300. The package may be partially wrapped around the first structural region 1012 as shown in fig. 22, may be entirely wrapped around the first structural region 1012 as shown in fig. 25, or may be entirely wrapped around the first structural region 1012 and the top surface of the first structural region 1012 is covered as shown in fig. 26. Finally, step S404 is executed to permanently cure the first adhesive 300, so as to obtain the optical lens finished product.

Further, in one embodiment, the optical lens with the first adhesive 300 as the diaphragm may be manufactured on the basis of the embodiment shown in fig. 22, and includes: a first glue 300 (the first glue 300 may be black) is added on the basis of fig. 22 to wrap all the outer sides of the first structural area 1012 and cover all the top surfaces of the first structural area 1012; and after baking, permanently curing and integrating all the first adhesive materials 300, thereby obtaining the optical lens with the first adhesive materials 300 serving as diaphragms. This approach helps to reduce the stray light of the optical lens. Fig. 23 and 24 show a process of manufacturing an optical lens with the first adhesive 300 as a diaphragm on the basis of the embodiment shown in fig. 22. Fig. 23 shows a schematic view of adding a first glue 300 to cover all the outer sides 1014 of the first structural area 1012 and to cover the top 1015 of the first structural area 1012 on the basis of fig. 22. The first adhesive 300 may be black. And the added first glue 300 covers the entire top surface 1015 of the first structure area 1012 to form a diaphragm. Fig. 24 shows a schematic view of all the first glue materials 300 permanently cured and integrated after baking the intermediate of fig. 23.

Further, in another embodiment, an optical lens with the first adhesive 300 as a diaphragm may be manufactured on the basis of the embodiment shown in fig. 25, and the optical lens includes: a first glue 300 (the first glue 300 may be black) is added on the basis of fig. 25 to wrap all outer sides of the first structural area 1012 and cover all top surfaces of the first structural area 1012; and after baking, permanently curing and integrating all the first adhesive materials 300, thereby obtaining the optical lens with the first adhesive materials 300 serving as diaphragms. This approach helps to reduce the stray light of the optical lens. Fig. 26 and 27 show a process of manufacturing an optical lens of the first adhesive 300 as a diaphragm on the basis of the embodiment shown in fig. 25. Fig. 26 shows a schematic view of adding a first glue 300 on the basis of fig. 25 to wrap all the outer sides of the first structural area 1012 and cover the top surface of the first structural area 1012. The first adhesive 300 may be black. And the added first glue 300 covers the entire top surface 1015 of the first structure area 1012 to form a diaphragm. Fig. 27 shows a schematic view of all the first glue materials 300 permanently cured and integrated after baking the intermediate of fig. 26.

Further, in still another embodiment, an optical lens with the first adhesive 300 as a diaphragm may be manufactured on the basis of the embodiment shown in fig. 28, and includes: adding a first glue 300 (the first glue 300 may be black) on the basis of fig. 28 to wrap all outer sides of the first structural area 1012 and cover all top surfaces 1015 of the first structural area 1012; and after baking, permanently curing and integrating all the first adhesive materials 300, thereby obtaining the optical lens with the first adhesive materials 300 serving as diaphragms. This approach helps to reduce the stray light of the optical lens. Fig. 29 and 30 show a process of manufacturing an optical lens with the first adhesive 300 as a diaphragm on the basis of the embodiment shown in fig. 28. Fig. 29 shows a schematic view of adding a first glue 300 on the basis of fig. 28 to wrap all outer sides 1014 of the first structural area 1012 and cover the top surface 1015 of the first structural area 1012. The first adhesive 300 may be black. And the added first glue 300 covers the entire top surface 1015 of the first structure area 1012 to form a diaphragm. Fig. 30 shows a schematic view of the semi-finished product shown in fig. 29 after baking to permanently cure and fuse all the first glue materials 300 together.

In the foregoing, the optical lens shown in fig. 22, 25 and 28, which is the basis for manufacturing the optical lens with the first adhesive 300 as the diaphragm, may be a finished product after the permanent curing step (S404) is completed; the pre-curing step may be completed but the permanent curing step (S404) is not completed, and in this case, the permanent curing of all the first adhesive 300 may be completed by one baking after the first adhesive 300 is added.

Further, according to an embodiment of the present application, there is also provided a method for manufacturing an optical lens having the first barrel 102. The first lens barrel 102 is added to enable the appearance of the optical lens to be more regular and attractive, meanwhile, the first lens 101 can be protected, and the influence of external impact on an optical system is reduced. The first lens barrel 102 may also act as a stop, thereby reducing the effect of external stray light on imaging quality. In this embodiment, the method for manufacturing an optical lens includes:

step S100, an optical lens semi-finished product based on active calibration is manufactured based on steps S10-S40, and then a glue is drawn on the periphery of the first glue 300 and the top surface 1015 of the first structural area 1012 of the first lens 101, for example, the liquid first glue 300 is added. Fig. 31 is a schematic diagram of the first lens 101 after the periphery of the first adhesive 300 and the top surface 1015 of the first structural region 1012 of the first lens 101 are coated in one embodiment of the present application. In this step, the semi-finished product produced in steps S10 to S40 may be subjected to a permanent curing process (e.g., baking), or may be subjected to a pre-curing process (e.g., exposure) but not subjected to a permanent curing process.

Step S200, covering the first lens barrel 102 on the first lens 101 to form a diaphragm, wherein the first lens barrel 102 is moved above the first lens 101, and then the first lens barrel 102 is gradually approaching the first lens 101 and contacting the added first adhesive 300, such that the first adhesive 300 fills the gaps between the outer side and top surfaces of the first lens 101 and the first lens barrel 102. Fig. 32 shows a schematic diagram in which the first lens barrel 102 is moved over the first lens 101, and then the first lens barrel 102 is gradually brought closer to the first lens 101. Fig. 33 shows a schematic view of the first barrel 102 contacting the added first adhesive 300. Then, the first lens barrel 102 continues to press the added liquid first adhesive 300 close to the first lens 101, so that the first adhesive 300 fills the gaps between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102. Fig. 34 shows a schematic view of the first adhesive 300 filling the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102.

Further, in one embodiment, the addition amount of the first adhesive 300 may be controlled to match the designed gap between the outer side 1014 and the top 1015 of the first lens 101 and the first barrel 102, so that the first adhesive 300 fills the gap between the outer side 1014 and the top 1015 of the first lens 101 and the first barrel 102.

Step S300, after the step S200 is completed, baking the combination of the first adhesive 300, the first lens 101, the first lens barrel 102 and the second lens component 200, so that all the first adhesive 300 is permanently cured, and the optical lens finished product with the first lens barrel 102 is obtained. As shown in fig. 35, in one embodiment of the present application, all of the first glue material 300 is permanently cured and fused into one body.

In the present embodiment, since the gaps between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102 are completely filled with the adhesive, the first lens 101 is not deformed or displaced due to the expansion of the gas during the baking process. It should be noted that in the actual mass production process, it is difficult to perfectly match the glue addition amount and the design gap in the production of each product, and therefore, a small air gap may exist between the first glue 300 and the first barrel 102. However, the air gap is usually very small, and the first adhesive 300 is located between the first adhesive and the first lens 101 to play a role of buffering, so that the air gap left by imperfect matching between the addition amount of the adhesive and the design gap does not affect the imaging quality, and the method of the embodiment still has a good yield.

Further, according to another embodiment of the present application, another method for manufacturing an optical lens having the first barrel 102 is also provided. As described above, adding the first lens barrel 102 can make the appearance of the optical lens more regular and beautiful, and can protect the first lens 101, so as to reduce the influence of external impact on the optical system. The first lens barrel 102 may also act as a stop, thereby reducing the effect of external stray light on imaging quality. In this embodiment, the method for manufacturing an optical lens includes:

step S1000, manufacturing an optical lens semi-finished product based on active calibration based on the steps S10-S40. In step S40, only steps S401 to S403 may be executed, or all of steps S401 to S404 may be executed. Fig. 37 shows a state of the semi-finished product after step S402 is completed in one embodiment of the present application. Fig. 38 is a schematic view showing exposure of the semi-finished product shown in fig. 37 to pre-cure the first paste 300 according to an embodiment of the present application. In fig. 38, arrows show light rays for exposing the first glue material 300.

In step S2000, a second glue material 500 in a liquid state is disposed on the top surface 2021 of the structural area of the second lens component 200, and the second glue material 500 surrounds the periphery of the first glue material 300. The second glue material 500 may be in contact with the pre-cured first glue material 300 or may be spaced apart from the pre-cured first glue material 300. In this embodiment, the second glue material 500 contacts the pre-cured first glue material 300, and preferably, the second glue material 500 may be made of the same material as the first glue material 300, so as to avoid the glue material variation caused by chemical reaction due to mutual doping.

Further, fig. 40A shows a schematic top view of the top surface of an exemplary second barrel 202. Referring to fig. 40A, the top surface of the second barrel 202 has an air escape groove 600. For simplicity and clarity of illustration, the orientation and location of the escape chute 600 is only schematically shown in fig. 40A. The air escape groove 600 may be a groove along the radial direction of the second barrel 202. Further, fig. 40B shows a partially enlarged schematic view of the AA' section in fig. 40A. Referring to fig. 40B, the air escape groove 600 includes an air vent slot 601 and two glue blocking slots 602 respectively located at two sides of the air vent slot 601. Further, fig. 41A shows a schematic diagram of drawing a paste on the top surface of the second barrel 202. It can be seen that the second adhesive 500 forms a ring shape with a notch on the top surface of the second barrel 202, and the notch is located at the position of the air escape slot 600. Fig. 41B shows a partially enlarged schematic view of the AA' section in fig. 41A. The glue blocking slot 602 accommodates the overflowed second glue material 500, so that the ventilation slot 601 is not blocked by the second glue material 500, thereby ensuring that the second glue material 500 is provided with a notch.

Step S3000, after the second adhesive 500 is applied, the first lens barrel 102 is covered on the first lens 101 to form a diaphragm. Wherein the first lens barrel 102 is moved above the first lens 101, and then the first lens barrel 102 is gradually brought close to the first lens 101 and the bottom surface 1021 of the first lens barrel 102 is brought into contact with the second adhesive 500. Fig. 42 shows a schematic diagram in which the first lens barrel 102 is moved over the first lens 101, and then the first lens barrel 102 is gradually brought closer to the first lens 101. Fig. 43 shows a schematic view of the bottom surface of the first barrel 102 contacting the added second adhesive 500. Then, the first lens barrel 102 continues to approach the first lens 101, the bottom surface 1021 of the first lens barrel 102 is fully contacted with the liquid second adhesive 500, and then the second adhesive 500 is pre-cured by exposure to fix the first lens barrel 102 to the top surface 2021 of the second lens barrel 202. Fig. 44 shows a schematic view of exposing the second photoresist 500. The arrows in the figure show the light used to expose the second glue 500. Fig. 45 shows a state of the semi-finished product after the completion of the pre-curing.

In step S4000, the first adhesive 300, the second adhesive 500, the first lens 101, the first barrel 102 and the second lens assembly 200 (i.e. the finished product after the step S3000) are baked, so that the first adhesive 300 and the second adhesive 500 are permanently cured. The finished product after baking is shown in fig. 46A. In this step, since the design of the air escape groove 600 can ensure that the second adhesive 500 is left with a gap, in the baking process, the cavity 1022 can be communicated with the outside through the vent groove 601 and the gap of the second adhesive 500, so as to avoid the dislocation or deformation of the first lens 101 caused by the air expansion in the cavity 1022, thereby further ensuring the imaging quality of the optical lens based on active calibration. In particular, the design of the air escape groove 600 can reduce the error of drawing the glue caused by careless operation (for example, carelessly forming the second glue 500 into a completely closed ring shape), which is beneficial to improving the yield in mass production.

Further, an image capturing module assembling method, based on the above embodiment, assembles an optical lens by using the optical lens assembling method described in the above embodiment; and assembling the camera module based on the optical lens.

Herein, the active calibration is to calibrate the relative positions of the first lens component 100 and the second lens component 200 based on the actual resolution curves measured by the actual imaging of the optical system (i.e. the imageable optical system is formed by the four second lenses 201 and one first lens 101 together), so as to improve the imaging quality of the optical lens.

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. FIG. 53A illustrates relative position adjustment in active calibration in one embodiment of the present application. In this adjustment mode, the first lens component 100 (or the first lens 101) may be movable in 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). Wherein the z-direction is a direction along the optical axis, and the x-y direction is a direction perpendicular to the optical axis. The x and y directions are both in an adjustment plane P in which translation can be resolved into two components in the x and y directions.

Fig. 53B illustrates rotational adjustment in active calibration according to another embodiment of the present application. In this embodiment, the relative position adjustment has an increased degree of rotational freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 53A. In this embodiment, the adjustment in the r-direction is a rotation in the adjustment plane P, i.e. about an axis perpendicular to the adjustment plane P.

Further, fig. 53C illustrates a relative position adjustment manner with increased v, w direction adjustment in active calibration according to yet another embodiment of the present application. Wherein 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 to form a vector angle representing the overall 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 (that is, 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.

Further, in one embodiment, the active calibration further comprises: according to the measured resolving power of the optical system, the angle of the axis of the or the first lens 101 relative to the axis of the second lens part 200, i.e. the adjustment in the w, v direction, is adjusted and determined. In the assembled optical lens or camera module, an included angle between the axis of the first lens 101 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 101 in a direction perpendicular to the adjustment plane (i.e. adjustment in the z-direction), determining the relative position between the first lens 101 and the second lens part 200 in the direction perpendicular to the adjustment plane based on the measured resolving power of the optical system.

Further, in one embodiment, in the pre-positioning step (step 20), a gap is provided between the bottom surface of the first lens 101 and the top surface of the second lens component 200; and in the bonding step (step 40), the adhesive is disposed in the gap.

In one embodiment, the first lens 101 may be formed of a plurality of sub-lenses that are integrally formed with each other. In this embodiment, the side surfaces and the top surface of the non-optical surface of the first lens 101 not used for imaging may form a light shielding layer. The light shielding layer may be formed by screen printing a light shielding material on the side and top surfaces of the first lens 101.

In one embodiment, in the active calibration step, the second lens component 200 may be fixed, the first lens 101 is clamped by the fixture, and the first lens 101 is moved under the drive of the six-axis motion mechanism connected to the fixture, so as to implement the relative movement between the first lens 101 and the second lens component 200 in the six degrees of freedom. Wherein the clamp may bear against or partially bear against the side of the first lens 101, thereby clamping the first lens 101.

It should be noted that in the above-described embodiment, the number of lenses of the first lens section 100 and the second lens section 200 may be adjusted as needed. For example, the number of lenses of the second lens part 200 may be one, two, three, or five, etc. Accordingly, the total number of lenses of the whole optical lens can be adjusted as required, for example, the total number of lenses of the optical lens can be six, three, four or seven, etc.

It should be noted that in the foregoing embodiments, the first adhesive material is required to wrap part or all of the side surfaces of the first lens by twice painting. This is because the first lens is to be picked up by the pick-up mechanism, which may be a jaw, during active calibration. Because of the need to avoid an actively calibrated optical path, the clamping jaw is preferably arranged at the side of the first lens, clamping the first lens from both sides by contacting the side of the first lens. Therefore, firstly, the gap between the bottom surface of the first lens and the top surface of the second lens barrel (or the second lens component) is coated with glue, after the glue material is pre-cured, the clamping jaw is released, and then, the side surface and the top surface of the first lens are coated with glue secondarily (namely, the liquid first glue material is added around the first structural area and/or on the top surface) and cured, so that the first glue material wraps part or all of the side surface of the first lens.

Further, fig. 47 is a schematic diagram illustrating drawing of the first adhesive on the top surface of the structural area of the second lens component in another embodiment of the present application. In this embodiment, the contact point 1019 (which may also be referred to as a contact surface) of the jaw 900 with the side 1014 of the first lens is positioned proximate to the top 1015 of the first lens. The first adhesive is drawn on the top surface of the second lens component, and the top surface of the first adhesive is controlled to be lower than a certain height, so that the clamping jaw 900 is not contacted with the first adhesive 300 all the time in the process of active calibration (or in the process of placing the first lens at the position determined by active calibration by the clamping jaw), for example, the clamping jaw is always higher than the top surface of the first adhesive in the process of active calibration, and thus, the first adhesive can wrap part of the side surface of the first lens (for example, the side surface of the first lens is wrapped in the area below the contact point of the clamping jaw and the first lens), and can not interfere with the clamping jaw. Meanwhile, the number of the primary painting glue is reduced, and the production efficiency is improved.

According to another embodiment of the present application, another method for assembling an optical lens is provided, in which the first adhesive material may wrap the side surface of the first lens by painting the adhesive once by painting the adhesive. Fig. 48 illustrates a glue pattern of the first glue material in one embodiment of the present application using a glue break. Fig. 49 shows a jaw arrangement corresponding to the glue pattern shown in fig. 48. Specifically, when the first adhesive is drawn on the top surface of the second lens component (referring to fig. 48, which shows that the first adhesive 300 is drawn on the top surface of the second lens barrel 202), the first adhesive 300 is not completely sealed, that is, the first adhesive may be a ring with a notch 309, and the notch is adapted to the clamping jaw 900 to form a gap through which the clamping jaw 900 can pass. Thus, during active calibration (or placement of the first lens by the jaws to a position determined by active calibration), the top surface of the first adhesive may be higher than the contact point of the jaws with the side surface of the first lens. After the bottom surface of first lens contacts the top surface of first glue material, the clamping jaw drives first lens and continues to move downwards, makes the top surface of first glue material be higher than the top surface of first lens (refer to the top surface of first structure district), and the top surface of first glue material flow to the top surface of first structure district that is located the top surface top of first structure district to make first glue material cover the top surface of first structure district and wrap up the side of first structure district. The process can be completed by one-time glue drawing, so that the production efficiency is improved. On the other hand, the design that the first adhesive material is provided with a notch can also provide an air escape hole for the subsequent baking step (the step of realizing permanent curing through baking) so as to avoid bad products caused by gas expansion in the baking process.

In particular, in one embodiment, the top surface of the first structural region of the first lens may be formed as an inclined surface with a high outer side and a low inner side, wherein the outer side is a side close to the outer side of the first lens, and the inner side is a side close to the first optical region of the first lens. Fig. 52 shows a schematic view of the first structure region in one embodiment of the present application, where the top surface is configured as an inclined surface. Under this scheme, when the top surface of the first glue material is higher than the top surface of the first structural region, the first glue material located above the top surface of the first structural region flows along the inclined surface 1016 of the top of the first structural region and covers the top surface of the first structural region. Further, an annular boss 1017 (or a glue dam) may be disposed on the top surface of the first structural region, so as to avoid the first glue material from contaminating the first optical region. Wherein the annular boss 1017 may be disposed at a position near the first optical zone.

Further, it should be noted that the relative position of the first lens and the second lens component determined after the active calibration may be an angle between the optical axis of the first lens and the optical axis of the second lens component that is different from zero. If the included angle is too large, the first lens barrel may interfere with the first lens when the first lens barrel is further mounted, resulting in poor product. Fig. 50 shows an example in which the first barrel interferes with the first lens. In one embodiment, after the step of actively calibrating, an included angle a between the optical axis of the first lens and the optical axis of the second lens component is obtained according to the recorded active calibration data, and in the step of covering the first lens on the first lens, an included angle B between the central axis of the first lens and the optical axis of the second lens component is determined according to the obtained included angle a between the optical axis of the first lens and the optical axis of the second lens component (for example, a difference between the included angle B and the included angle a is smaller than a preset threshold value), so as to avoid that the first lens interferes (or collides) with the first lens to cause poor products. Fig. 51 shows an example of avoiding interference between the first barrel and the first lens by making the difference between the angle B and the angle a smaller than a preset threshold.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. An optical lens, comprising:

a first lens part including at least one first lens and a first barrel, the at least one first lens being mounted to an inner side of the first barrel;

a second lens part including a second barrel and at least one second lens mounted on the second barrel, and the at least one second lens and the at least one first lens together constitute an imageable optical system, wherein at least a portion of an outer side surface of a bottommost second lens of the at least one second lens is exposed to an outside of the second barrel, and a top surface of the bottommost second lens is abutted against a bottom surface of the second barrel, an outer diameter of the first lens being larger than an outer diameter of the smallest second lens; and

A connecting medium adapted to fix the first lens component and the second lens component together;

wherein,,

the at least one first lens and the first lens barrel have the same or similar variation conditions; and/or

The moisture absorption rate of the first lens barrel is smaller than that of the second lens barrel.

2. The optical lens according to claim 1, wherein the outer side face of the bottommost second lens is entirely exposed outside the second barrel, the bottommost second lens includes an optical area for imaging and a structural area other than the optical area, and a top face of the structural area is abutted against and bonded to a bottom face of the second barrel.

3. The optical lens according to claim 1, wherein the bottommost second lens has an extension portion formed to extend outwardly from a side surface thereof in a direction perpendicular to an axis thereof, a bottom surface of the second lens barrel has a groove, and the extension portion is fitted into the groove.

4. An optical lens as claimed in claim 3, wherein the bottommost second lens includes an optical zone for imaging and a structural zone other than the optical zone, and the extension is located in the structural zone.

5. The optical lens of claim 4, wherein the regions of the bottommost second lens other than the extension are the optical zones, and the sides of the optical zones of the bottommost second lens bear against the inner side of the second barrel.

6. The optical lens of claim 4, wherein there is a transition region between the optical region and the extension in the structural region.

7. An optical lens as claimed in claim 3, wherein the bottommost second lens has a plurality of the extensions.

8. The optical lens according to claim 6, wherein the number of the extension portions is two, the transition region and the two extension portions are formed by cutting the annular structural region twice, and the cut surfaces of the two cuts are both planar and parallel to each other.

9. An optical lens as claimed in claim 3, wherein the bottommost second lens is secured to the second barrel by a second adhesive between the extension and the recess.

10. The optical lens of claim 1, wherein the connection medium is a first adhesive material having a gap between the first lens part and the second lens part in a direction along the optical axis, and the first adhesive material is located in the gap.

11. The optical lens of claim 10, wherein the first adhesive is adapted to support and secure the first lens component and the second lens component and to maintain the relative positions of the first lens component and the second lens component in a relative position determined by active calibration.

12. The optical lens of claim 11, wherein the optical axis of the first lens component and the optical axis of the second lens component have a non-zero included angle therebetween.

13. The optical lens of claim 1, wherein the number of first lenses is one.

14. An imaging module comprising the optical lens of any one of claims 1-13.

15. An optical lens assembly method, wherein the optical lens comprises a first lens component and a second lens component, the first lens component comprises a first lens barrel and at least one first lens installed in the first lens barrel, the second lens component comprises a second lens barrel and at least one second lens installed in the second lens barrel, the outer diameter of the first lens is larger than the outer diameter of the smallest second lens, and the at least one first lens and the first lens barrel have the same or similar variation condition; and/or the moisture absorption rate of the first lens barrel is smaller than that of the second lens barrel; the optical lens assembly method comprises the following steps:

Pre-positioning the first lens part and the second lens part separated from each other so that the at least one second lens and the at least one first lens together form an imageable optical system, wherein at least a part of an outer side surface of a bottommost second lens of the at least one second lens is exposed to the outside of the second barrel, and a top surface of the bottommost second lens is supported against a bottom surface of the second barrel;

adjusting and determining the relative positions of the first lens component and the second lens component based on active calibration; and

and bonding the first lens component and the second lens component through a glue material, and supporting and fixing the first lens component and the second lens component after the glue material is solidified so as to keep the relative positions of the first lens component and the second lens component at the relative positions determined through active calibration.

16. The method of assembling an optical lens of claim 15, wherein prior to the pre-positioning, the method further comprises:

embedding and fixing a plurality of second lenses into each stage of steps on the inner side of the second lens cone one by one from small to large; and

And attaching the last second lens to the bottom surface of the second lens barrel to obtain the second lens component.

17. The method of assembling an optical lens according to claim 16, wherein the last second lens has an extension formed to extend outwardly from a side thereof in a direction perpendicular to an axis thereof, and a bottom surface of the second lens barrel has a groove, wherein the attaching the last second lens to the bottom surface of the second lens barrel comprises:

the extension part of the last second lens is embedded into the groove of the bottom surface of the second lens barrel.

18. The method of any of claims 15-17, wherein the actively calibrating comprises: the first lens component is shot and moved by a shooting mechanism to adjust and determine the relative position of the first lens and the second lens component.

19. The method of optical lens assembly of claim 18, wherein the actively calibrating further comprises: moving the first lens component along an adjustment plane, determining a relative position between the first lens component and the second lens component on the adjustment plane according to an actual measured resolution based on an actual imaging result of the optical system; the relative position on the adjustment plane comprises a relative position in a translational direction and/or a rotational direction on the adjustment plane.

20. The method of optical lens assembly of claim 19, wherein the actively calibrating further comprises: and adjusting and determining an included angle of the axis of the first lens component relative to the axis of the second lens component according to the actual measured resolving power based on the actual imaging result of the optical system.

21. The method of optical lens assembly of claim 20, wherein the actively calibrating further comprises: the first lens part is moved in a direction perpendicular to the adjustment plane, and a relative position between the first lens part and the second lens part in the direction perpendicular to the plane is determined based on an actually measured resolving power based on an actual imaging result of the optical system.

22. An optical lens, comprising:

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

a second lens component including a second barrel and at least one second lens mounted within the second barrel, the at least one second lens and the first lens together constituting an imageable optical system, and the first barrel being of a different material than the second barrel, an outer diameter of the first lens being greater than an outer diameter of a smallest of the second lenses; and

A first glue material located in a first gap between a first lens component and a second lens component, the first glue material being adapted to support and fix the first lens component and the second lens component after curing, wherein an angle other than zero is formed between an axis of the first lens component and an axis of the second lens component;

wherein, the at least one first lens and the first lens cone have the same or similar variation conditions; and/or the moisture absorption rate of the first lens barrel is smaller than that of the second lens barrel.

23. The optical lens of claim 22, wherein the first adhesive is adapted to support and secure the first lens component and the second lens component such that the relative position of the first lens component and the second lens component is maintained at the relative position determined through active calibration.

24. The optical lens of claim 22, wherein a difference between a coefficient of thermal expansion of the first barrel and a coefficient of thermal expansion of the first lens is less than a first threshold.

25. The optical lens of any one of claims 22-24, wherein the first lens is a glass lens and the first barrel is a metal barrel.

26. The optical lens of claim 25, wherein the first lens is a borosilicate glass lens and the first barrel is an oxygen-free copper barrel.

27. The optical lens of claim 22, wherein the first barrel has a material elastic modulus that is less than a material elastic modulus of the first lens to cushion the force of the external uptake mechanism on the first lens.

28. The optical lens of claim 27, wherein the material of the first barrel is a material having a density of 0.920-0.940 g/cm ³ And the material of the first lens is polymethyl methacrylate material.

29. The optical lens of any one of claims 22-24, wherein the first barrel is made of a first plastic, the first lens is made of a second plastic, and the difference between the coefficients of thermal expansion of the first plastic and the second plastic is 4 x 10 ^-5 within/deg.C.

30. The optical lens of claim 28 wherein the number of first lenses is less than the number of second lenses and the second lenses are closer to the photosensitive chip than the first lenses.

31. The optical lens of claim 30, wherein the number of first lenses is one and an outer diameter of the first lenses is larger than the second lenses having the smallest outer diameter.

32. The optical lens of any one of claims 30-31, wherein the second barrel is made of polycarbonate material.

33. The optical lens of claim 29, wherein the first gel is located between the first lens barrel and the second lens barrel and not between the first lens barrel and the second lens barrel.

34. A camera module, comprising: the optical lens of any one of claims 22-33.

35. An optical lens assembly method, wherein the optical lens comprises a first lens component and a second lens component, wherein the first lens component comprises a first lens barrel and at least one first lens installed in the first lens barrel, the second lens component comprises a second lens barrel and at least one second lens installed in the second lens barrel, wherein the first lens barrel is made of a material different from the second lens barrel, the outer diameter of the first lens is larger than the outer diameter of the smallest second lens, and the at least one first lens and the first lens barrel have the same or similar variation condition; and/or the moisture absorption rate of the first lens barrel is smaller than that of the second lens barrel;

The optical lens assembly method comprises the following steps:

pre-positioning the first lens component and the second lens component such that the at least one first lens and the at least one second lens together form an imageable optical system;

actively calibrating 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

and bonding the first lens component and the second lens component to support and fix the relative positions of the first lens component and the second lens component.

36. The method for assembling the camera module is characterized by comprising the following steps: assembling an optical lens using the optical lens assembling method of claim 15; and manufacturing the image pickup module based on the assembled optical lens.

37. An optical lens, comprising:

a first lens part including a first lens having a first optical zone for optical imaging and a first structural zone other than the first optical zone, and a first barrel mounted on an inner side of the first lens;

a second lens member including a second barrel and at least one second lens mounted on the second barrel, the at least one second lens and the first lens together constituting an imageable optical system, the second lens having a second optical zone for optical imaging and a second structural zone other than the second optical zone, the second structural zone and the second barrel constituting a structural zone of the second lens member, and a first gap being provided between a top surface of the structural zone of the second lens member and a bottom surface of the first structural zone, an outer diameter of the first lens being larger than an outer diameter of the smallest second lens; and

The first adhesive material is positioned in the first gap, extends outwards along the top surface of the structural area of the second lens component and surrounds the first structural area, and at least one part of the outer side surface of the first structural area is wrapped by the first adhesive material which extends outwards;

wherein, the first lens and the first lens cone have the same or similar variation conditions; and/or the moisture absorption rate of the first lens barrel is smaller than that of the second lens barrel.

38. The optical lens of claim 37, wherein the first adhesive is adapted to support and secure the first lens element and the second lens element such that the relative position of the first lens element and the second lens element is maintained at the relative position determined by active calibration.

39. The optical lens of claim 37, wherein the first glue material wraps all of the outer sides of the first structural region.

40. The optical lens of claim 39, wherein the first adhesive further covers a top surface of the first structural region.

41. The optical lens of claim 40, wherein the first adhesive is black to cover the outer side and the top surface of the first structural region.

42. The optical lens of claim 37, wherein the first lens component further comprises a first barrel surrounding the first lens and blocking light from outside directed to the outer and top surfaces of the first structural region.

43. The optical lens of claim 42, wherein the first adhesive fills a gap between the outer side and top surfaces of the first lens and the first barrel.

44. The optical lens of claim 42, wherein a second adhesive is disposed between a bottom surface of the first barrel and a top surface of the second barrel, the first barrel being bonded to the second barrel by the second adhesive.

45. The optical lens of claim 44, wherein the outer and top surfaces of the first lens and the first barrel have a cavity therebetween.

46. The optical lens of claim 45, wherein the first lens component and/or the second lens component has an air escape passage that communicates the cavity with the outside.

47. The optical lens of claim 46, wherein the air escape channel comprises an air escape groove located at a top surface of the second barrel and/or at a bottom surface of the first barrel.

48. The optical lens of claim 47, wherein the second adhesive forms a ring shape with a notch on a top surface of the second barrel, the notch being located at the position of the air escape groove.

49. The optical lens of claim 48, wherein the air escape slot comprises an air vent slot and two glue blocking slots respectively positioned at two sides of the air vent slot, the glue blocking slots receiving the overflowed second glue material such that the air vent slot is not blocked by the second glue material.

50. The optical lens of claim 43, wherein the top surface of the first structural region has a flash groove at an end thereof adjacent to the first optical region.

51. The optical lens of any one of claims 43-49 wherein a top surface of the first structural region is sloped and an end of the top surface of the first structural region proximate the first optical region is higher than an end of the top surface of the first structural region proximate an outer side of the first structural region.

52. The optical lens of claim 37, wherein the top surface of the second barrel is a flat surface, the first gap is located between the flat surface and the bottom surface of the first structural region, the first adhesive is located in the first gap and extends outwards along the flat surface and surrounds the first structural region, and the outwards extending first adhesive wraps at least a part of the outer side surface of the first structural region.

53. An imaging module comprising the optical lens of any one of claims 37-52.

54. An optical lens assembly method, wherein the optical lens comprises a first lens component and a second lens component which are separated from each other, the first lens component comprises a first lens and a first lens barrel, the first lens is installed on the inner side of the first lens barrel, the second lens component comprises a second lens barrel and at least one second lens installed in the second lens barrel, the outer diameter of the first lens is larger than the outer diameter of the smallest second lens, and the first lens barrel have the same or similar variation condition; and/or the moisture absorption rate of the first lens barrel is smaller than that of the second lens barrel; the method comprises the following steps:

the preparation steps are as follows: preparing the first lens part and the second lens part separated from each other;

pre-positioning the first lens component and the second lens component such that the first lens and the at least one second lens together form an imageable optical system;

Bonding the first lens and the second lens part through a first adhesive, wherein the first lens is provided with a first optical area for optical imaging and a first structural area outside the first optical area, the second lens is provided with a second optical area for optical imaging and a second structural area outside the second optical area, the second structural area and the second lens barrel form a structural area of the second lens part, a first gap is arranged between the top surface of the structural area of the second lens part and the bottom surface of the first structural area, the first adhesive is positioned in the first gap and outwards extends along the top surface of the structural area of the second lens part and surrounds the first structural area, at least one part of the outer side surface of the first structural area is wrapped by the outwards extending first adhesive, and the first adhesive is solidified to fix and keep the first lens and the second lens part in a relative position determined by active calibration.

55. The method of assembling an optical lens of claim 54, wherein the step of bonding by the first adhesive comprises:

arranging a liquid first adhesive material on the top surface of the structural area of the second lens component;

Moving the first lens to the upper part of the second lens component, gradually approaching the second lens component and contacting the first adhesive, and adjusting the relative position of the first lens and the second lens component to the relative position determined by active calibration, wherein the arranged liquid first adhesive is at least positioned in the first gap;

pre-curing the first adhesive material; and

the first glue material is permanently cured.

56. The method of claim 55, wherein during the pre-curing step, the first lens and the second lens component are maintained in the relative position determined by active alignment by means of an external uptake mechanism and/or a fixed platform, and after pre-curing, the first lens and the second lens component are maintained in the relative position determined by active alignment by means of a pre-cured first adhesive.

57. The method of assembling an optical lens of claim 56, wherein said pre-curing step comprises exposing said first encapsulant to light.

58. The method of assembling an optical lens of claim 57, further comprising:

And between the pre-curing step and the permanent curing step, a pasty first adhesive material is added around and on the top surface of the first structural area, so that the first adhesive material wraps all the outer side surfaces of the first structural area and covers the top surface of the first structural area.

59. The method of assembling an optical lens of claim 57 or 58, wherein the permanently curing step comprises:

and baking the pre-cured combination of the first adhesive material, the first lens and the second lens component to enable the first adhesive material to be permanently cured.

60. The method of assembling an optical lens of claim 57, further comprising:

after the permanent curing step, adding a liquid first glue material around and on the top surface of the first structural area, so that the first glue material wraps all the outer side surfaces of the first structural area and covers the top surface of the first structural area; and

and curing the added first adhesive.

61. The method of claim 60, wherein the first adhesive is black, and wherein the step of adding the first adhesive in a liquid state forms the first adhesive on the top surface of the first structure region into a diaphragm.

62. The method of assembling an optical lens of claim 60, further comprising:

after the step of adding the liquid first glue material, a first lens cone is covered on the first lens to form a diaphragm, wherein the first lens cone is moved above the first lens, then the first lens cone gradually approaches the first lens and contacts the added first glue material, and the first glue material fills gaps between the outer side surface and the top surface of the first lens and the first lens cone.

63. The method of claim 62, wherein the amount of the first adhesive is controlled to match a designed gap between the outer and top surfaces of the first lens and the first barrel such that the first adhesive fills the gap between the outer and top surfaces of the first lens and the first barrel.

64. The method of claim 62, wherein in the preparing step, an end of the top surface of the first structure region near the first optical region has a glue overflow groove; and

in the step of covering the first lens barrel on the first lens, the overflow groove accommodates the overflowed first adhesive material.

65. The method of assembling an optical lens assembly of any one of claims 61-64, wherein the permanently curing step comprises:

and baking the pre-cured combination of the first adhesive material, the first lens barrel and the second lens component, so that the first adhesive material is permanently cured.

66. The method of assembling an optical lens of claim 57 or 58, further comprising:

after the pre-curing step, arranging a liquid second adhesive material on the top surface of the structural area of the second lens component, wherein the second adhesive material surrounds the periphery of the first adhesive material; and

and covering the first lens barrel on the first lens to form a diaphragm, wherein the first lens barrel is moved to be above the first lens, and then the first lens barrel gradually approaches the first lens and the bottom surface of the first lens barrel contacts the second adhesive material.

67. The method of assembling an optical lens of claim 66, wherein the permanently curing step comprises:

and baking the pre-cured combination of the first adhesive, the second adhesive, the first lens barrel and the second lens component, so that the first adhesive and the second adhesive are permanently cured.

68. The method of assembling an optical lens as claimed in claim 67, wherein in the preparing step, a top surface of the second barrel and/or a bottom surface of the first barrel has an air escape groove.

69. The method of claim 66, wherein in the disposing a liquid second adhesive, the second adhesive forms a ring with a notch on a top surface of the second lens barrel in a top view.

70. The method of assembling an optical lens as claimed in claim 69, wherein in the preparing step, a top surface of the second barrel has an air escape groove; and

in the step of arranging the liquid second glue material, the notch is positioned at the position of the air escape groove.

71. The method of assembling an optical lens of claim 70, wherein in the preparing step, the air escape groove includes an air vent groove and two glue blocking grooves respectively located at both sides of the air vent groove; and

in the step of arranging the liquid second glue material, the glue blocking groove accommodates the overflowed second glue material, so that the ventilation sub groove is not blocked by the second glue material.

72. The method of claim 55, wherein in the step of disposing a liquid first adhesive material on a top surface of the structural region of the second lens component, the first adhesive material is formed into a ring shape with a notch adapted to avoid an intake mechanism that intakes the first lens from a side surface.

73. The method of claim 72, wherein in the step of disposing a liquid first adhesive on a top surface of the structural region of the second lens component, the pick-up mechanism is a clamping jaw.

74. The method of claim 72, wherein in the preparing step, a top surface of the first structural region is an inclined surface with a higher outer side and a lower inner side.

75. The method of claim 74, wherein in the preparing step, the top surface of the first structural region is provided with an annular boss.

76. The method according to claim 62, wherein in the step of covering the first lens barrel with the first lens barrel, an angle a between an optical axis of the first lens barrel and an optical axis of the second lens member is determined, and an angle B between a central axis of the first lens barrel and the second lens member is determined such that a difference between the angle B and the angle a is smaller than a predetermined threshold.

77. The method for assembling the camera module is characterized by comprising the following steps: assembling an optical lens using the optical lens assembly method of any one of claims 54-76; and

And assembling the camera module based on the optical lens.