CN110275264B

CN110275264B - Optical lens, camera module and assembling method thereof

Info

Publication number: CN110275264B
Application number: CN201810220892.4A
Authority: CN
Inventors: 褚水佳; 刘林; 蒋恒; 向恩来
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2018-03-16
Filing date: 2018-03-16
Publication date: 2023-07-18
Anticipated expiration: 2038-03-16
Also published as: CN110275264A

Abstract

The present invention provides an optical lens comprising: a first lens component comprising at least one first optic; a second lens component including a second barrel and at least one second lens, and the second lens and the first lens together constitute an imageable optical system; and a glue material bonding the first lens component and the second lens component together, and at least a portion of the glue material being interposed between one of the at least one first lens closest to the second lens component and one of the at least one second lens closest to the first lens component. The invention also provides a corresponding optical lens assembly method, an image pickup module and an assembly method thereof. The invention can reduce the lens position offset caused by the deformation of the lens barrel; the imaging quality of the optical lens or the camera module can be improved.

Description

Optical lens, camera module and assembling method thereof

Technical Field

The invention relates to the technical field of optical imaging, in particular to an optical lens, 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, the high-pixel, small-size and large-aperture camera module is an irreversible development trend of the existing camera module. Currently, the market is providing an increasing demand for the imaging quality of camera modules. Factors affecting the resolution of a camera module for a given optical design include the quality of the optical imaging lens and manufacturing errors during 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.

On the other hand, in the processing procedure of the camera module, the assembly process (such as the mounting of the photosensitive chip and the locking process of the motor lens) of each structural member may lead to the inclination of the photosensitive chip, and the superposition of multiple inclinations may lead to the failure of the resolution of the imaging module to reach the predetermined specification, thereby resulting in low yield of the module factory. In recent years, a module factory compensates for relative shift and tilt of a lens optical axis and a photosensitive chip optical axis by an Active Alignment (Active Alignment) process when assembling an imaging lens and a photosensitive module. However, this process has limited compensation capability. Since various aberrations affecting the resolution result from the capabilities of the optical system (especially the optical imaging lens), when the resolution of the optical imaging lens is insufficient, the existing active calibration process of the photosensitive module is difficult to compensate.

In order to overcome the above-mentioned drawbacks, the applicant proposes an assembly method for manufacturing a complete optical lens or camera module by adjusting and determining the relative positions of the upper and lower sub-lenses based on an active calibration process, and then bonding the upper and lower sub-lenses together according to the determined relative positions. 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 and bonding based on the upper and lower sub-lenses are a brand new production process, and challenges are still faced to realize stable and reliable mass production based on the production process. For example, the lens barrels of the sub lenses of the upper sub lens and the lower sub lens are bonded by using the adhesive, and an acting force is formed on the lens barrels in the curing deformation process of the adhesive, and the acting force causes the undesired deformation of the lens barrels, so that the shape and the position of lenses installed in the lens barrels are changed. In this case, the actual lens position of the optical system after the adhesive is completely cured deviates from the lens position of the optical system determined by active calibration, which may lead to an unexpected imaging quality. For another example, the expansion coefficient of the adhesive is fixed, but the adhesive disposed between the upper and lower sub-lenses is often uneven (for example, the thickness of the adhesive is uneven due to the overflow of the adhesive generated by the upper and lower lens barrels), which easily causes deformation due to uneven stress of the lens barrels, thereby causing lens variation, or may cause position deviation of the upper sub-lens. The above problems may all lead to a reduction in imaging quality.

Disclosure of Invention

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

According to an aspect of the present invention, there is provided an optical lens comprising: a first lens component comprising at least one first optic; a second lens component including a second barrel and at least one second lens mounted within the second barrel, and the at least one second lens and the at least one first lens together constituting an imageable optical system; and a glue material bonding the first lens component and the second lens component together, and at least a portion of the glue material being interposed between one of the at least one first lens closest to the second lens component and one of the at least one second lens closest to the first lens component.

In one embodiment, the axis of the one first lens closest to the second lens component and the axis of the one second lens closest to the first lens component have a non-zero angle therebetween.

In one embodiment, the first lens component further comprises a first barrel, the first lens bearing against and being fixed to the first barrel.

In one embodiment, the top and/or outer side of the first lens bears against the first barrel.

In one embodiment, the axis of the first barrel coincides with or is parallel to the axis of the second barrel.

In one embodiment, the thickness of the adhesive material between the first barrel and the second barrel in the optical axis direction is the same.

In one embodiment, the first lens part further comprises a first barrel, and the at least one first lens is mounted inside the first barrel.

In one embodiment, the adhesive comprises a first adhesive and a second adhesive, the second adhesive is interposed between one of the at least one first lens closest to the second lens component and one of the at least one second lens closest to the first lens component, and the second adhesive provides an adhesive force greater than the adhesive force provided by the first adhesive.

In one embodiment, the first lens component and the second lens component have a first gap and a second gap therebetween, the first adhesive and the second adhesive are coated on the first gap and the second gap, respectively, and the first gap is closer to the outer side of the optical lens than the second gap.

In one embodiment, the first glue is a glue that is cured by light.

In one embodiment, the second glue is a glue that is cured by heat, moisture, anaerobic or oxidation.

In one embodiment, the first glue material is a UV glue or a UV thermosetting glue.

In one embodiment, the second glue material is a thermosetting glue or a UV thermosetting glue.

In one embodiment, the first glue material and the second glue material are the same material when in a liquid state, and the first glue material and the second glue material form different materials with different microstructures after curing, so that the adhesive force provided by the second glue material after curing is greater than the adhesive force provided by the first glue material after curing.

In one embodiment, the first and second glue materials are both UV thermosetting glue.

In one embodiment, the first and second glue materials do not contact each other.

In one embodiment, the first gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.

In one embodiment, the second gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.

In one embodiment, the second gap differs from the first gap in size along the optical axis of the optical lens by less than a threshold.

In one embodiment, the first gap is located between an end face of the first barrel and an end face of the second barrel.

In one embodiment, the second gap is located between a non-optical face of one of the at least one first lens closest to the second lens component and a non-optical face of one of the at least one second lens closest to the first lens component.

In one embodiment, the non-optical face of one of the at least one first lens closest to the second lens component has a roughened surface.

In one embodiment, the non-optical face of one of the at least one second lens closest to the first lens component has a roughened surface.

In one embodiment, the glue is used to support and fix the first lens part and the second lens part such that the relative position of the first lens part and the second lens part is maintained at the relative position determined by active calibration.

In one embodiment, the second gap has a second opening toward an optical axis of the optical lens, a size of the second opening in a direction along the optical axis being larger than an average size of the second gap.

In one embodiment, the first gap has a first opening toward an outside of the optical lens, a size of the first opening being larger than an average size of the first gap in a direction along the optical axis.

In one embodiment, the first lens is closer to the front end of the optical lens than the second lens.

In one embodiment, the end face of the second lens bonded to the first lens has an annular groove located between the second gap and the optical face of the second lens.

In one embodiment, the end face of the second lens bonded to the first lens has a boss, and the second gap is located between the boss and the first lens.

In one embodiment, the end face of the first lens bonded to the second lens has a boss, and the second gap is located between the boss and the second lens.

In one embodiment, the cross-sectional shape of the boss is rectangular, trapezoidal, triangular or semi-circular.

In one embodiment, the end face of the second lens bonded to the first lens has a second boss, the end face of the first lens bonded to the second lens has a first boss, and the second gap is located between the first boss and the second boss.

In one embodiment, the end face of the second lens bonded to the first lens has an annular dam located between the optical zone of the second lens and the second gap; and, in a direction perpendicular to an optical axis of the optical lens, a gap of at least 50 μm is provided between the annular dam and the boss.

In one embodiment, the non-optical face of the second lens bonded to the first lens has an inwardly recessed step or groove.

According to another aspect of the present invention, there is also provided an image capturing module including the aforementioned optical lens.

According to still another aspect of the present invention, there is also provided an optical lens assembly method including: preparing a first lens part and a second lens part, wherein the first lens part comprises at least one first lens, and the second lens part comprises a second lens barrel and at least one second lens installed in the second lens barrel; 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; 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 component and the second lens component by a glue material, wherein at least a part of the glue material is between the first lens and the second lens.

In one embodiment, the active calibration includes: the first lens is captured by direct contact with the first lens, thereby moving the first lens to adjust and determine the relative position of the first lens and the second lens component.

In one embodiment, the active calibration further comprises: and adjusting and determining an included angle of the axis of the first lens relative to the axis of the second lens according to the actually measured resolving power of the optical system.

In one embodiment, the active calibration further comprises: moving the first lens along a plane, determining a relative position between the first lens and the second lens component in a moving direction along the plane according to an actual measured resolving power of the optical system; movement along the plane includes translation and/or rotation in the plane.

In one embodiment, the active calibration further comprises: the first lens is moved in a direction perpendicular to the plane, and a relative position between the first lens and the second lens component in the direction perpendicular to the plane is determined based on the measured resolving power of the optical system.

In one embodiment, the bonding by glue comprises: applying a glue between the first lens and the second lens, curing the glue between the first lens and the second lens to support and fix the first lens and the second lens component, maintaining the relative positions of the first lens and the second lens component at the relative positions determined by active calibration; the optical lens assembly method further includes: after the adhesive material between the first lens and the second lens is solidified, the first lens barrel is mounted on the first lens.

In one embodiment, mounting a first barrel to the first lens includes: the first lens barrel is supported against the top surface and/or the outer side surface of the first lens.

In one embodiment, mounting the first barrel to the first lens further comprises: and coating a glue material between the first lens barrel and the second lens barrel and bonding the first lens barrel and the second lens barrel.

In one embodiment, mounting the first barrel to the first lens further comprises: the axis of the first lens barrel is coincident with or parallel to the axis of the second lens barrel.

In one embodiment, in the preparing step, the first lens part further includes a first lens barrel, and the at least one first lens is mounted inside the first lens barrel.

In one embodiment, the bonding by the adhesive material comprises: the first lens part and the second lens part are supported and fixed by a cured adhesive so that the relative positions of the first lens part and the second lens part are maintained at the relative positions determined by active calibration.

In one embodiment, the pre-positioning the first lens component and the second lens component further comprises: forming a first gap and a second gap between the first lens component and the second lens component, wherein the first gap is closer to the outer side of the optical lens than the second gap; the bonding by the adhesive material comprises the following steps: coating a first adhesive material and a second adhesive material on the first gap and the second gap respectively, wherein the adhesive force of the second adhesive material is larger than that of the first adhesive material; solidifying the first adhesive to pre-fix the first lens component and the second lens component; and curing the second adhesive to permanently bond the first lens component and the second lens component.

In one embodiment, in the step of performing the predetermined positioning of the first lens part and the second lens part, the first gap formed is located between an end face of the first barrel and an end face of the second barrel; and the second gap formed is located between one of the at least one first lens closest to the second lens component and one of the at least one second lens closest to the first lens component.

In one embodiment, in the step of bonding by the adhesive, the first adhesive is a photo-setting adhesive, and the second adhesive is a thermosetting adhesive.

According to still another aspect of the present invention, there is also provided an assembling method of an image capturing module, including: assembling an optical lens by using the optical lens assembling method; and manufacturing the image pickup module by using the assembled optical lens.

According to still another aspect of the present invention, there is also provided an assembling method of an image capturing module, including: preparing a first lens component and an image pickup module component, wherein the image pickup 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; 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 train; 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 component and the second lens component through a glue material, wherein at least a part of the glue material is between the first lens and the second lens.

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

1. the invention can reduce the lens position deviation caused by the deformation of the lens barrel.

2. The invention can provide main adhesive force by directly bonding the lenses of the upper lens component and the lower lens component, thereby reducing the influence of lens barrel variation in the lens components on the lenses.

3. The invention can improve the weather resistance of the optical lens or the camera module. For example, the mode of connecting the lens and the lens can enhance the weather resistance of the lens barrel when the material is plastic, for example, the high temperature and the high humidity are used as test standards in the weather resistance and the optical imaging quality experiments of the camera module and the optical lens, and the difference of the optical imaging quality is low after the lens is subjected to the high temperature and the high humidity environment.

4. The invention can avoid the overflow glue from polluting the optical area of the lens.

5. The invention can realize the direct bonding of the lenses of the upper lens part and the lower lens part and simultaneously increase the adhesive force between the lenses.

6. The invention can provide the camera module and the optical lens with better imaging quality.

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 imaging module 1000 according to one embodiment of the invention;

FIG. 2 illustrates an enlarged partial cross-sectional view of the bonded area of the first lens component 100 and the second lens component 200 in one embodiment of the invention;

FIG. 3 is an enlarged partial cross-sectional view of the bonding area of the first lens component 100 and the second lens component 200 in another embodiment of the present invention;

fig. 4 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;

fig. 5 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;

fig. 6 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;

fig. 7 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;

FIG. 8 is a flow chart illustrating a method of assembling an optical lens in one embodiment of the invention;

FIG. 9 shows a flow chart of step 40 in one embodiment of the invention;

FIG. 10 is a flowchart of an assembly method of camera modules according to another embodiment of the present invention;

FIG. 11a is a schematic cross-sectional view of a first lens and a second lens component according to an embodiment of the present invention after being pre-positioned;

FIG. 11b is a schematic cross-sectional view showing the positional relationship of the first lens element and the second lens element after active alignment according to one embodiment of the present invention;

fig. 11c shows a schematic cross-sectional view of the first barrel mounted on the basis of fig. 11 b;

FIG. 11d shows an enlarged schematic view of a partial region in FIG. 11 a;

FIG. 11e shows an enlarged schematic view of a partial region in FIG. 11 b;

FIG. 11f shows an enlarged schematic view of a partial region in FIG. 11 c;

FIG. 11g is an enlarged view showing a partial area of the dispensing position of the adhesive material between the first barrel and the second barrel added to the view of FIG. 11 f;

FIG. 12a illustrates relative position adjustment in active calibration in one embodiment of the invention;

FIG. 12b illustrates rotational adjustment in active calibration in accordance with another embodiment of the present invention;

fig. 12c shows a relative position adjustment with increased v, w direction adjustment in active calibration according to yet another embodiment of the invention.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that 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 imaging module 1000 according to an embodiment of the invention. The camera module 1000 includes an optical lens and a photosensitive assembly 300. The optical lens comprises a first lens component 100, a second lens component 200 and a glue material 400 for bonding the first lens component 100 and the second lens component 200 together. The first lens component 100 includes a first lens barrel 101 and one first lens 102, and the second lens component 200 includes a second lens barrel 201 and five second lenses 202. In this embodiment, the second lens 202 closest to the first lens component 100 is directly bonded to the first lens 101. In the present embodiment, the second lens part 200 may further include a motor 203, and the second barrel 202 may be mounted in a carrier of the motor 203 (an internal structure of the motor is not shown in fig. 1). The photosensitive assembly 300 includes a wiring board 301, a photosensitive chip 302 mounted on the wiring board 301, a cylindrical support 303 mounted on the wiring board 301 and surrounding the photosensitive chip, and a color filter 304 mounted on the cylindrical support 303. The motor 203 is mounted on the top surface of the cylindrical support 303 to fix the second lens member 200 and the photosensitive assembly 300 together. It should be noted that in other embodiments of the present invention, the motor 203 in fig. 1 may be replaced with other structures such as a cylindrical support, or the motor 203 in fig. 1 may be omitted and the second barrel 201 may be directly mounted on the top surface of the cylindrical support 303. It should be noted that in other embodiments the motor 203 may be replaced by other types of optical actuators, such as SMA (shape memory alloy) actuators, MEMS actuators. Wherein the optical actuator refers to a device for causing the optical lens to move relative to the photosensitive chip.

Further, fig. 2 shows a partially enlarged cross-sectional schematic view of the bonding area of the first lens component 100 and the second lens component 200 in one embodiment of the invention. Referring to fig. 2, in the present embodiment, the first lens part 100 and the second lens part 200 have a first gap and a second gap therebetween. The positions of the first gap and the second gap are marked in fig. 2 with "(1)" and "(2)", respectively. The adhesive material comprises a first adhesive material and a second adhesive material, wherein the first adhesive material and the second adhesive material are respectively coated on the first gap and the second gap, and the first gap is closer to the outer side of the optical lens than the second gap (namely, the second gap is closer to the optical axis of the optical lens than the first gap). And, the second adhesive is interposed between the first lens 102 and the second lens 202. Referring to fig. 2, the first gap is located between the end face 111 of the first barrel 101 and the end face 211 of the second barrel 201. The second gap is located between the non-optical face 112 of the first lens 101 and the non-optical face 212 of one of the second lenses 202 closest to the first lens component 100. The non-optical face of one of the lenses is the surface of the portion of the lens that does not participate in optical imaging. The portion of the lens that does not participate in optical imaging may be referred to as the non-optical zone, sometimes referred to as the inactive zone. In this embodiment, the non-optical zone of the lens may act as a support. In this embodiment, the adhesive (including the first adhesive and the second adhesive) is used to support and fix the first lens component 100 and the second lens component 200, so that the relative positions of the first lens component 100 and the second lens component 200 are maintained at the relative positions determined by active calibration. Wherein the first adhesive material can be used for pre-fixing, and the second adhesive material is used for permanent fixing. Further, in one embodiment, the surface of the non-optical surface 212 of the second lens 202 coated with the second adhesive may be roughened to increase the roughness thereof, thereby increasing the adhesion between the second adhesive and the surface of the non-optical surface 212. The surface of the non-optical surface of the first lens 102 may also be roughened to increase the roughness thereof, thereby increasing the adhesion between the second adhesive and the surface of the non-optical surface. By roughening the surface of the non-optical surface of the first lens 102 and/or the second lens 202, the adhesive force provided by the second adhesive material can be increased, so that the adhesive force provided by the second adhesive material is greater than the adhesive force provided by the first adhesive material, and the reliability of the manufactured optical lens or camera module is enhanced.

In one embodiment, the first glue material is a UV glue, which can be cured by exposure to light. The second glue material is thermosetting glue, and the thermosetting glue can be cured by baking the lens or the module. The thermosetting adhesive can provide an adhesive force greater than that of the UV adhesive after being cured, so that the adhesive force provided by the second adhesive material is greater than that provided by the first adhesive material. The UV glue is applied to a first gap on the outside (i.e. the side farther from the optical axis) and the thermosetting glue is applied to a second gap on the inside (i.e. the side closer to the optical axis). The UV glue is cured by direct irradiation of light to pre-fix the relative positions of the first lens part and the second lens part as determined by active calibration. And then heating the pre-fixed optical lens to solidify the thermosetting adhesive at the second gap, thereby enhancing the structural strength of the optical lens and improving the reliability of the optical lens.

It should be noted that in other embodiments, the first adhesive may be another adhesive cured by light (e.g., may be a UV thermosetting adhesive). The second glue may also be other glue that is cured by heat, moisture, anaerobic or oxidation.

In another embodiment, the first adhesive material and the second adhesive material may be the same material in the liquid state, for example, the first adhesive material and the second adhesive material may both be UV thermosetting adhesives. However, the UV thermosetting adhesives located in the first gap and the second gap are cured in different manners (for example, the UV thermosetting adhesive in the first gap may be directly irradiated with light to complete photocuring, and then the UV thermosetting adhesive in the second gap is thermally cured), so that different materials with different microstructures are formed after curing, so that the adhesive force provided by the second adhesive material after curing is greater than the adhesive force provided by the first adhesive material after curing. The microstructure may be, for example, a molecular structure, a micron-sized physical form, a molecular proportion, a lattice form, or the like.

Further, in an embodiment, the first glue material and the second glue material may not contact each other, so as to avoid chemical changes generated after the first glue material and the second glue material are mixed, and affect the glue characteristics. The embodiment can further enhance the reliability of the optical lens or the camera module because chemical changes generated after the first adhesive and the second adhesive are mixed are avoided.

Further, in one embodiment, the first gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.

Further, in one embodiment, the second gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.

Further, when the first and second adhesive materials use the same material in a liquid state (i.e., when not cured), a difference in size between the second gap and the first gap in a direction along the optical axis of the optical lens is smaller than a threshold value.

In the above embodiment, the second lens 202 is directly bonded to the first lens 101 through the second adhesive (for example, thermosetting adhesive), so that the positions of the first lens 102 and the second lens 202 are prevented from being changed due to the deformation of the first lens barrel 101 and the second lens barrel 201 in the curing process of the second adhesive, and the imaging quality of the optical lens and the camera module is improved.

Further, still referring to fig. 2, in one embodiment, the non-optical face 112 of the first lens 101 has a first boss 115, and the first boss 115 may be annular in top view. The first land 115 and the non-optical surface 212 of the second lens 202 form the second gap therebetween. And, the second gap has a second opening 402 toward the optical axis of the optical lens, the size of the second opening 402 being larger than the average size of the second gap in a direction along the optical axis. That is, a large opening is provided between the first lens component 100 and the second lens component 200 on the side close to the optical axis. This can avoid poor imaging caused by glue spilling over the active area (i.e. the optical area) of the contaminated lens. Further, the surface of the non-optical zone of the second lens 202 may also have a groove 213, the groove 213 being annular in top view. The recess 213 may be used to store excess glue to prevent the glue from contaminating the lens. Further, the first gap has a first opening 401 toward the outside of the optical lens, and the size of the first opening 401 in the direction along the optical axis is larger than the average size of the first gap. That is, a larger opening is also provided between the first lens part 100 and the second lens part 200 on the side close to the outside. In one embodiment, the first lens 102 is closer to the front end of the optical lens than the second lens 202 (the front end of the optical lens refers to the light incident end, and the rear end refers to the end closer to the photosensitive element).

In the above embodiment, the first adhesive may also be a UV thermosetting adhesive. The second adhesive material can also be UV thermosetting adhesive.

Further, fig. 3 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in another embodiment of the present invention. Referring to fig. 3, in the present embodiment, the non-optical surface 112 of the first lens 101 has a first boss 115, and the first boss 115 may be annular in a top view. The end face 212 of the second lens 202, which is bonded to the first lens 102, has an annular dam 216 which is annular in plan view, the annular dam 216 being located between the optical zone of the second lens 202 and the second gap so as to block the flow of glue to the lens active area (i.e. optical zone). And, in a direction perpendicular to the optical axis of the optical lens, the annular dam 216 and the first boss 115 have a gap therebetween of at least 50 μm so as to prevent the annular dam 216 from affecting active alignment of the first and second lens components.

Further, fig. 4 shows a partially enlarged cross-sectional view of a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention. In this embodiment, the non-optical surface (i.e., the surface of the inactive area) of the second lens 202, which is bonded to the first lens 102, has an inwardly recessed step 217 to block the spilled adhesive from contaminating the active area of the lens. The step 217 is annular in plan view, and may replace the annular dam 216 in the embodiment of fig. 3, and may reduce difficulty in lens processing relative to the annular dam 216 design.

Further, fig. 5 shows a partially enlarged cross-sectional view of a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention. In this embodiment, the non-optical surface (i.e., the surface of the inactive area) of the second lens 202 to which the first lens 102 is bonded has an inwardly recessed groove 218 to block spilled adhesive from contaminating the active area of the lens. Also, the recess 218 is annular in plan view, and may replace the annular dam 216 in the embodiment of fig. 3 or the step 217 in the embodiment of fig. 4. The grooves 218 can increase the bonding area between the first lens 102 and the second lens 202 while blocking the adhesive, thereby increasing the bonding strength.

Further, fig. 6 shows a partially enlarged cross-sectional view of a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention. In this embodiment, the end surface 212 of the second lens 202 bonded to the first lens 102 has a boss 213. The second gap is located between the boss 213 and the non-optical face 112 of the first lens 101. In this embodiment, the boss 213 is used to replace the groove design in the embodiment of fig. 2, so that the lens can be better prevented from being contaminated by glue overflow. The cross-sectional shape of the boss 213 includes, but is not limited to, trapezoidal, rectangular, triangular, semi-circular, etc. Typically, the second lens component is placed under the first lens component during active calibration and bonding. At this time, a chamfer 402a may be provided on the annular boss 213 of the second lens member 200 positioned below to provide a larger opening for the second gap, thereby preventing glue from contaminating the effective area (i.e., optical zone) of the lens to cause poor imaging.

Further, fig. 7 shows a partially enlarged cross-sectional view of a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention. In this embodiment, the first lens 102 of this embodiment is added with a first boss 115 facing the second lens 202, as compared to the embodiment of fig. 6. Specifically, in this embodiment, the non-optical surface 112 of the first lens 102 bonded to the second lens 202 has a first land 115. The first land 115 is located in the inactive (i.e., non-optical) zone of the first lens 102. The second gap is located between the first boss 115 and the second boss 212 of the second lens 202. In this embodiment, the glue coated on the second boss 212 can be led to two sides of the boss when overflowing, so that the glue can be prevented from polluting the effective area of the lens. The cross-sectional shapes of the first boss 115 and the second boss 212 include, but are not limited to, trapezoidal, rectangular, triangular, semi-circular, etc. Both the first boss 115 and the second boss 212 may be provided with a chamfer to increase the second opening 402 of the second gap to better channel the glue overflow.

It should be noted that in the above-described embodiment, the number of lenses of the first lens component and the second lens component may be adjusted as needed. For example, the number of lenses of the first lens component and the second lens component may be two and four, or three and three, or four and two, or 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 described above and the second lens component 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 and one second lens component located between the two first lens components, and all first lenses of the two first lens components and all second lenses of the one second lens component together constitute an imageable optical system that performs active calibration. When the number of lens elements of the optical lens is four, the optical lens may include two first lens elements and two second lens elements, and be arranged in the order of the first lens elements, the second lens elements, the first lens elements, and the second lens elements from top to bottom, and all of the first lenses of the two first lens elements and all of the second lenses of the two second lens elements together constitute an imageable optical system for active calibration. Other variations such as these are not described in detail herein.

Further, fig. 8 shows a flowchart of an optical lens assembly method in an embodiment of the invention. Referring to fig. 8, the method includes:

step 10, preparing 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, and the second lens component comprises a second lens barrel and at least one second lens installed in the second lens barrel.

Step 20, 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 30, adjusting and determining the relative position of the first lens component and the second lens component based on the active calibration.

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

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.

Further, in one embodiment, in the step 30, a first gap and a second gap are formed between the first lens component and the second lens component, wherein the first gap is closer to an outer side of the optical lens than the second gap.

Further, FIG. 9 shows a flow chart of step 40 in one embodiment of the invention. Referring to fig. 9, the step 40 includes the sub-steps of:

step 401, coating a first adhesive material and a second adhesive material on the first gap and the second gap, respectively, wherein the adhesive force of the second adhesive material is greater than that of the first adhesive material.

Step 402, curing the first adhesive to pre-fix the first lens component and the second lens component.

Step 403, curing the second adhesive to permanently bond the first lens component and the second lens component. The first adhesive material can be UV adhesive, and the second adhesive material can be thermosetting adhesive.

In step 403, since the first lens is directly adhered to the corresponding second lens, a change in the lens position caused by deformation of the first lens barrel and/or the second lens barrel can be avoided, so that the permanent relative position between the first lens and the second lens formed after curing is ensured to be consistent with the relative position between the first lens component and the second lens component determined by active calibration.

Further, in one embodiment, in the step 10, the first gap is formed between an end face of the first lens barrel and an end face of the second lens barrel. And the second gap is formed between the non-optical surface of the first lens and the non-optical surface of the second lens.

Further, when the first and second adhesive materials use the same material in a liquid state (i.e., when uncured), the difference in size of the second gap and the first gap in the direction along the optical axis of the optical lens is smaller than a threshold value (the threshold value is smaller than 100 μm).

Further, according to an embodiment of the present invention, 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, fig. 10 shows a flowchart of an assembling method of an image capturing module according to another embodiment of the present invention, the method includes:

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.

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, wherein at least a part of the glue material is between the first lens and the second lens.

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.

Further, the active calibration described herein may adjust the relative positions of the first lens component and the second lens component in multiple degrees of freedom. FIG. 12a illustrates relative position adjustment in active calibration in one embodiment of the invention. In this adjustment mode, the first lens part (which may also be a first lens) may be movable in x, y, z directions relative to the second lens part (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. 12b shows rotational adjustment in active calibration of another embodiment of the present invention. 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. 3. 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. 12c shows a relative position adjustment manner with increased v, w direction adjustment in active calibration according to yet another embodiment of the present invention. 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 with respect to the second lens component (that is, the tilt of the optical axis of the first lens component with respect to the optical axis of the second lens component) 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 invention, the relative position adjustment may be performed by adjusting only any one of the six degrees of freedom, or may be performed by a combination of any two or more of them.

Further, fig. 11a to c show an assembly process of the optical lens according to an embodiment of the present invention, the assembly process includes:

in step 1, the second lens component is fixed by a fixing mechanism (not shown), and the first lens 102 of the first lens component 100 is clamped (or absorbed) by an intake mechanism (not shown) to perform a predetermined position, so that the first lens component 100 and the second lens component 200 form an imageable optical system. FIG. 11a is a schematic cross-sectional view of a first lens and a second lens component according to an embodiment of the invention after being pre-positioned. Fig. 11d shows an enlarged schematic view of a partial region in fig. 11a, the enlarged portion being the region within the circle in fig. 11 a. Referring to fig. 11a and 11d, the first lens component 100 has at least one first bearing surface 102c, the second lens component 200 has at least one second bearing surface 202c, and at least one of the first bearing surface 102c and the second bearing surface 202c forms at least one gap between the first bearing surface 102c and the second bearing surface 202 c. The first lens component 100 is taken by the taking mechanism, so that the first lens component 100 is actively adjusted relative to the second bearing surface of the second lens component, the active adjustment comprises taking a reference object, preferably a target, and acquiring a correction amount, preferably an MTF value, or an SFR or Tv Line value, from image information, and after acquiring a relevant correction amount, the taking mechanism adjusts the positions of the first lens component and the second lens component to perfect the optical system, the reference standard of the specific optical system comprises that the optical system after the optical system is perfect has reduced aberration compared with an optical system without adjustment, the performance of improving the resolution is improved, and the perfect index of the optical system can also be set as required. The predetermined position is used as a starting step in a subsequent process flow, and generally conforms to the design dimensions of the gap when the first and second lens components are predetermined.

In one embodiment, the second lens component is actively adjusted relative to the first bearing surface by the ingestion mechanism, and the active adjustment includes an adjustment of the first bearing surface and the second bearing surface relative to the X-axis and/or the Y-axis and/or the Z-axis, so that the relative positions of the first bearing surface and the second bearing surface change, and an included angle is formed between the first bearing surface and the second bearing surface, and in general, the magnitude of the included angle after the adjustment is inconsistent with the included angle in the pre-positioning. The angle changes the size of the gap at the predetermined position, and thus may cause an error in the adjusted gap from the designed gap size.

In one embodiment, the adjusting the relative position of the first lens 102 with respect to the second lens component 200 by the ingestion mechanism includes: by adjusting the angle of the axis of the first lens part relative to the axis of the second lens part, the first lens part is moved relative to the second lens part along an adjustment plane, and the lens part is moved along a direction perpendicular to the adjustment plane, the measured resolution (e.g. MTF value, SFR value or Tv Line value) of the optical system imaging is improved. Wherein said moving along the adjustment plane comprises translating and/or rotating on said adjustment plane. After active calibration, the angle between the axis of the first lens 102 and the axis of the second lens component 200 may be non-zero. The axis of the second lens part 200 may be represented by the axis of the second barrel 201 or the second lens 202.

Step 2, after the adjusted gap is recorded, the capturing mechanism moves the first lens component 100 away from the second lens component to expose the second bearing surface 202c. After the dispensing process is performed on the second bearing surface 202c, the pick-up mechanism returns the first lens component 100 to the recording position. FIG. 11b is a schematic cross-sectional view showing the positional relationship of the first lens element and the second lens element after active alignment according to an embodiment of the present invention. Fig. 11e shows an enlarged schematic view of a partial region in fig. 11b, the enlarged portion being the region within the circle in fig. 11 b. Note that the position of dispensing in this step is marked with "(2)", but the glue is not shown. After the first lens component returns to the recording position, the glue material is cured by the shooting mechanism, wherein the curing mode comprises a thermosetting mode so as to achieve the strength of supporting the first lens component and the second lens component. In this embodiment, the first bearing surface 102c is located in the non-optical area of the first lens 102, and the second bearing surface 202c is located in the non-optical area of the second lens 202, so that the adhesive is located between the first bearing surface 102c and the second bearing surface 202c.

Step 3, the first lens barrel 101 is mounted on the first lens 102 to enhance the structural strength of the first lens component 100 and the second lens component 200 and protect the lenses to a certain extent. The first lens barrel 101 is mounted on the top surface and/or the side surface of the first lens 102 through a pickup mechanism, and the mounting manner may be a screw structure, so as to connect the first lens barrel and the first lens. In this embodiment, it is preferable that a glue material is coated on the top surface of the first lens, and the glue material plays a role of connecting and fixing the first lens barrel and the first lens. Fig. 11c shows a schematic cross-sectional view of the first barrel mounted on the basis of fig. 11 b. Fig. 11f shows an enlarged schematic view of a partial region in fig. 11c, the enlarged portion being the region within the circle in fig. 11 b. Further, fig. 11g shows an enlarged schematic view of a partial area of the dispensing position of the adhesive material between the first barrel and the second barrel added on the basis of fig. 11 f. Wherein "(1)" marks the dispensing position of the adhesive material between the first lens barrel and the second lens barrel.

In particular, in one embodiment, the ingestion mechanism preferably controls the gap between the first barrel and the second barrel to be the same size, i.e., no correction is made between the barrels, so that the first barrel and the second barrel are good in appearance consistency. The gel material between the first barrel and the second barrel is therefore shown as "(1)" having the same size in the optical axis direction.

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 component comprising at least one first optic;

a second lens component including a second barrel and at least one second lens mounted within the second barrel, and the at least one second lens and the at least one first lens together constituting an imageable optical system; and

and the adhesive material is used for bonding the first lens component and the second lens component together, the adhesive material comprises a first adhesive material and a second adhesive material, the second adhesive material is arranged between one first lens closest to the second lens component in the at least one first lens and one second lens closest to the first lens component in the at least one second lens, and the adhesive force provided by the second adhesive material is larger than the adhesive force provided by the first adhesive material.

2. The optical lens of claim 1 wherein the axis of the one first lens closest to the second lens component and the axis of the one second lens closest to the first lens component have an angle therebetween that is not zero.

3. The optical lens of claim 2, wherein the first lens component further comprises a first barrel, the first lens bearing against and being secured to the first barrel.

4. An optical lens as claimed in claim 3, wherein the top and/or outer side of the first lens barrel bears against the first barrel.

5. An optical lens according to claim 3, wherein the axis of the first barrel coincides with or is parallel to the axis of the second barrel.

6. An optical lens according to claim 3, wherein a thickness of a gel material between the first barrel and the second barrel in an optical axis direction is the same.

7. The optical lens of claim 1, wherein the first lens component further comprises a first barrel, the at least one first lens being mounted inside the first barrel.

8. The optical lens of claim 7, wherein the first lens component and the second lens component have a first gap and a second gap therebetween, the first and second glue materials are coated on the first and second gaps, respectively, and the first gap is closer to an outside of the optical lens than the second gap.

9. The optical lens of claim 8, wherein the first glue is a glue that is cured by light.

10. The optical lens of claim 8, wherein the second glue is a glue that is cured by thermal curing, moisture curing, anaerobic curing, or oxidation.

11. The optical lens of claim 8, wherein the first glue material is a UV glue or a UV thermosetting glue.

12. The optical lens of claim 8, wherein the second adhesive is a thermosetting adhesive or a UV thermosetting adhesive.

13. The optical lens of claim 8, wherein the first and second glue materials are the same material when in a liquid state, and the first and second glue materials form different materials having different microstructures after curing, such that the adhesive force provided by the second glue material after curing is greater than the adhesive force provided by the first glue material after curing.

14. The optical lens of claim 13, wherein the first and second glue materials are both UV thermosets.

15. The optical lens of claim 1, wherein the first and second gel materials are not in contact with each other.

16. The optical lens according to claim 8, wherein a dimension of the first gap in a direction along an optical axis of the optical lens is 30-100 μm.

17. The optical lens according to claim 8, wherein a dimension of the second gap in a direction along an optical axis of the optical lens is 30-100 μm.

18. The optical lens of claim 8, wherein a difference in a dimension of the second gap and the first gap in a direction along an optical axis of the optical lens is less than a threshold.

19. The optical lens of claim 8, wherein the first gap is located between an end face of the first barrel and an end face of the second barrel.

20. The optical lens of claim 8 wherein the second gap is located between a non-optical face of one of the at least one first lens closest to the second lens component and a non-optical face of one of the at least one second lens closest to the first lens component.

21. The optical lens of claim 20, wherein the non-optical face of one of the at least one first lens closest to the second lens component has a roughened surface.

22. The optical lens of claim 20 wherein the non-optical face of the one of the at least one second lens closest to the first lens component has a roughened surface.

23. The optical lens of claim 7, wherein the glue is used to support and secure the first lens component and the second lens component such that the relative positions of the first lens component and the second lens component remain in the relative positions determined by active calibration.

24. The optical lens of claim 20, wherein the second gap has a second opening toward an optical axis of the optical lens, a dimension of the second opening in a direction along the optical axis being greater than an average dimension of the second gap.

25. The optical lens according to claim 19, wherein the first gap has a first opening toward an outside of the optical lens, a size of the first opening being larger than an average size of the first gap in a direction along the optical axis.

26. The optical lens of claim 14, wherein the first lens is closer to a front end of the optical lens than the second lens.

27. The optical lens of claim 26 wherein the end face of the second lens bonded to the first lens has an annular groove located between the second gap and the optical face of the second lens.

28. The optical lens of claim 26 wherein the end face of the second lens bonded to the first lens has a boss, the second gap being located between the boss and the first lens.

29. The optical lens of claim 26 wherein the end face of the first lens bonded to the second lens has a boss, the second gap being located between the boss and the second lens.

30. An optical lens as claimed in claim 28 or 29, wherein the cross-sectional shape of the boss is rectangular, trapezoidal, triangular or semi-circular.

31. The optical lens of claim 26 wherein the end face of the second lens bonded to the first lens has a second boss and the end face of the first lens bonded to the second lens has a first boss, the second gap being located between the first boss and the second boss.

32. The optical lens of claim 29, wherein an end face of the second lens bonded to the first lens has an annular dam located between an optical zone of the second lens and the second gap; and, in a direction perpendicular to an optical axis of the optical lens, a gap of at least 50 μm is provided between the annular dam and the boss.

33. The optical lens of claim 29 wherein the non-optical face of the second lens bonded to the first lens has an inwardly recessed step or groove.

34. An imaging module comprising the optical lens of any one of claims 1-33.

35. An optical lens assembly method, comprising:

preparing a first lens part and a second lens part, wherein the first lens part comprises at least one first lens, and the second lens part comprises a second lens barrel and at least one second lens installed in the second lens barrel;

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;

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

the first lens component and the second lens component are bonded through a glue material, the glue material comprises a first glue material and a second glue material, the second glue material is arranged between one first lens closest to the second lens component in the at least one first lens and one second lens closest to the first lens component in the at least one second lens, and the adhesive force provided by the second glue material is larger than the adhesive force provided by the first glue material.

36. The method of claim 35, wherein the actively calibrating comprises: the first lens is captured by direct contact with the first lens, thereby moving the first lens to adjust and determine the relative position of the first lens and the second lens component.

37. The method of optical lens assembly of claim 36, wherein the actively calibrating further comprises: and adjusting and determining an included angle of the axis of the first lens relative to the axis of the second lens according to the actually measured resolving power of the optical system.

38. The method of optical lens assembly of claim 37, wherein the actively calibrating further comprises: moving the first lens along a plane, determining a relative position between the first lens and the second lens component in a moving direction along the plane according to an actual measured resolving power of the optical system; movement along the plane includes translation and/or rotation in the plane.

39. The method of optical lens assembly of claim 38, wherein the actively calibrating further comprises: the first lens is moved in a direction perpendicular to the plane, and a relative position between the first lens and the second lens component in the direction perpendicular to the plane is determined based on the measured resolving power of the optical system.

40. The method of assembling an optical lens of claim 35, wherein the bonding by glue comprises: applying a glue between the first lens and the second lens, curing the glue between the first lens and the second lens to support and fix the first lens and the second lens component, maintaining the relative positions of the first lens and the second lens component at the relative positions determined by active calibration; and

The optical lens assembly method further includes:

after the adhesive material between the first lens and the second lens is solidified, the first lens barrel is mounted on the first lens.

41. The method of assembling an optical lens according to claim 40, wherein mounting a first lens barrel to the first lens piece comprises: the first lens barrel is supported against the top surface and/or the outer side surface of the first lens.

42. The method of assembling an optical lens according to claim 41, wherein mounting a first barrel to the first lens further comprises: and coating a glue material between the first lens barrel and the second lens barrel and bonding the first lens barrel and the second lens barrel.

43. The method of assembling an optical lens of claim 42, wherein mounting a first barrel to the first lens further comprises: the axis of the first lens barrel is coincident with or parallel to the axis of the second lens barrel.

44. The method of assembling an optical lens of claim 35, wherein in the preparing step, the first lens part further comprises a first barrel, and the at least one first lens is mounted inside the first barrel.

45. The method of assembling an optical lens of claim 44, wherein the bonding by adhesive comprises:

the first lens part and the second lens part are supported and fixed by a cured adhesive so that the relative positions of the first lens part and the second lens part are maintained at the relative positions determined by active calibration.

46. The method of assembling an optical lens of claim 44, wherein said pre-positioning said first lens component and said second lens component further comprises: forming a first gap and a second gap between the first lens component and the second lens component, wherein the first gap is closer to the outer side of the optical lens than the second gap; and

the bonding by the adhesive material comprises the following steps:

coating the first adhesive material and the second adhesive material on the first gap and the second gap respectively;

solidifying the first adhesive to pre-fix the first lens component and the second lens component; and

and curing the second adhesive to permanently bond the first lens component and the second lens component.

47. The method of assembling an optical lens as claimed in claim 46, wherein in the step of positioning the first lens part and the second lens part, the first gap formed is located between an end face of the first lens barrel and an end face of the second lens barrel; and the second gap formed is located between one of the at least one first lens closest to the second lens component and one of the at least one second lens closest to the first lens component.

48. The method of claim 46, wherein in the step of bonding by adhesive, the first adhesive is a photo-setting adhesive and the second adhesive is a thermosetting adhesive.

49. 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 35-48; and

and manufacturing an image pickup module by using the assembled optical lens.

50. The method for assembling the camera module is characterized by comprising the following steps:

preparing a first lens component and an image pickup module component, wherein the image pickup 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;

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 train;

The first lens component and the second lens component are bonded through the adhesive, the adhesive comprises a first adhesive and a second adhesive, the second adhesive is arranged between one first lens closest to the second lens component in the at least one first lens and one second lens closest to the first lens component in the at least one second lens, and the adhesive force provided by the second adhesive is larger than the adhesive force provided by the first adhesive.