CN110554471B

CN110554471B - Optical lens, camera module and assembling method thereof

Info

Publication number: CN110554471B
Application number: CN201810541239.8A
Authority: CN
Inventors: 田中武彦; 梅其敏; 蒋恒
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2018-05-30
Filing date: 2018-05-30
Publication date: 2023-06-20
Anticipated expiration: 2038-05-30
Also published as: CN110554471A; CN112649934B; CN112649934A

Abstract

The present invention provides an optical lens comprising: first and second lens components, and a first adhesive. The first lens component comprises a first lens barrel and at least one first lens, and the second lens component comprises a second lens barrel and at least one second lens. All of the second lenses and all of the first lenses form an imageable optical system. The inside of the first lens barrel is provided with a first accommodating hole, at least one of the first lenses is embedded into the first accommodating hole, the embedded first lens is provided with a first outer side surface, and the first outer side surface comprises: directly contacts with the side surface of the first accommodating hole and forms a close-fitting contact part; and a non-contact portion which is not in direct contact with the side surface of the first accommodation hole, and which is adhered to the first barrel by an adhesive. The invention also provides a corresponding method for assembling the optical lens and the camera module. The invention can reduce the lens position deviation 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, 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 the field of compact camera modules (e.g., camera modules for cell phones), it is often necessary to take into account the quality of the optical imaging lens and manufacturing errors during the packaging of the module. 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.

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 in order to improve the product yield.

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 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

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 inner side of the first lens barrel is provided with a first accommodating hole, at least one of the at least one first lens is embedded into the first accommodating hole, the first accommodating hole is provided with a first accommodating hole side surface, the embedded first lens is provided with a first outer side surface, and

The first outer side surface includes:

a contact part which is in direct contact with the side surface of the first accommodating hole and forms tight fit; and

and a non-contact portion which is not in direct contact with the first accommodation hole side surface, and which is adhered to the first barrel by an adhesive.

The side surface of the first accommodating hole is polygonal, the side surface of the first lens is circular, and the embedded first lens and the first accommodating hole are tightly matched at the contact part.

The first accommodating hole is further provided with a first accommodating hole top surface, a light passing hole is formed in the middle area of the first accommodating hole top surface, the first lens is provided with a first optical area for imaging and a first structural area surrounding the first optical area, the outer side surface of the first structural area is circular, the top surface of the first structural area is supported against the first accommodating hole top surface, and the diameter of an inscribed circle of a polygon of the side surface of the first accommodating hole is smaller than the diameter of a circle of the outer side surface of the first structural area, so that close fit is formed at the contact part of the side surface of the first accommodating hole and the outer side surface of the first structural area.

The adhesive glue is arranged in the area among the side face of the first accommodating hole, the top face of the first accommodating hole and the outer side face of the first structural area.

Wherein the polygon is a regular polygon.

The first accommodating hole comprises a first accommodating layer and a first photoresist layer arranged below the first accommodating layer, the first accommodating layer is provided with a first accommodating hole side surface and a first accommodating hole top surface, the height of the first accommodating hole side surface is smaller than the thickness of the first structural area, the first photoresist layer is provided with a first photoresist layer top surface and a first photoresist layer side surface, the distance from the first photoresist layer side surface to the optical axis is larger than the distance from the first accommodating hole side surface to the optical axis, a first photoresist area is formed by the outer side surface of the first structural area, the first photoresist layer top surface and a gap between the first photoresist layer side surface, and the adhesive tape is arranged in the first photoresist area so as to fix the first lens and the first lens barrel together.

The first adhesive glue accommodating area is formed between the side face of the first accommodating hole, the top face of the first accommodating hole and the outer side face of the first structural area, and the first adhesive glue accommodating area is communicated with the first painting area to accommodate the adhesive glue.

Wherein a first distance of the first receiving hole is at least 0.015mm greater than a radius of the first lens embedded therein, wherein the first distance is a distance from a vertex of the polygon of the first receiving hole to a center of the first receiving hole.

Wherein a second distance of the first accommodation hole is smaller than a radius of the first lens inserted into the first accommodation hole to form a tight fit at the contact portion, and a difference between the radius of the first lens and the second distance is not more than 0.005mm, the second distance being a distance from a side of the polygon of the first accommodation hole to a center of the first accommodation hole.

Wherein the adhesive glue of the first glue drawing area forms a ring shape with a notch.

Wherein the first lens is formed by an injection molding process and an outer side of the first lens has a lens cut surface;

the first lens barrel is formed through an injection molding process, and the outer side surface of the first lens barrel is provided with a lens barrel notch surface; and

the lens cutout surface is provided on the opposite side of the barrel cutout surface.

The second lens is embedded into the second accommodating hole, the second lens is provided with a second optical area for imaging and a second structural area surrounding the second optical area, the side surface of the second accommodating hole is tightly matched with the outer side surface of the second structural area, and the second lens is fixed with the second lens barrel through the adhesive glue.

The first adhesive is suitable for supporting and fixing the first lens component and the second lens component so as to maintain the relative positions of the first lens component and the second lens component at the relative positions determined by active calibration.

According to another aspect of the present invention, there is provided an image pickup module including: the optical lens of any one of the above.

According to still another aspect of the present invention, there is 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 barrel and at least one first lens mounted within the first barrel, and the second lens part includes a second barrel and at least one second lens mounted within the second barrel;

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;

in the preparation step, the inner side of the first lens barrel is provided with a first accommodating hole, the first accommodating hole is provided with a first accommodating hole side surface and a first accommodating hole top surface, the middle area of the first accommodating hole top surface is provided with a light passing hole, the first accommodating hole side surface is polygonal on a plane perpendicular to the optical axis of the optical lens, the first lens is provided with a first optical area for imaging and a first structural area surrounding the first optical area, the outer side of the first structural area is circular, the first lens is embedded into the first accommodating hole, a tight fit is formed at a contact part of the first accommodating hole side surface and the outer side of the first structural area, the top surface of the first structural area is supported against the first accommodating hole top surface, and an adhesive is further arranged between the outer side of the first structural area and the inner side of the first lens barrel so as to fix the first lens and the first lens barrel together.

The first accommodating hole comprises a first accommodating layer and a first photoresist layer arranged below the first accommodating layer, the first accommodating layer is provided with a first accommodating hole side surface and a first accommodating hole top surface, the height of the first accommodating hole side surface is smaller than the thickness of the first structural area, the first photoresist layer is provided with a first photoresist layer top surface and a first photoresist layer side surface, the distance from the first photoresist layer side surface to the optical axis is larger than the distance from the first accommodating hole side surface to the optical axis, and a first photoresist area is formed by the outer side surface of the first structural area, the gap between the first photoresist layer top surface and the first photoresist layer side surface, and the first lens component and the second lens component which are prepared to be separated from each other further comprise:

Inverting the first barrel;

embedding the first lens into the first accommodating hole, so that the top surface of the first structural area of the first lens is supported against the top surface of the first accommodating hole, and the first optical area of the first lens is positioned in the light passing hole;

and drawing the adhesive in the first adhesive drawing area, and solidifying the adhesive to bond the first lens and the first lens barrel, wherein the adhesive forms a ring shape with a notch.

Wherein, in the step of preparing the first lens component and the second lens component separated from each other, further comprising:

inverting the second lens barrel, wherein the inner side of the second lens barrel is provided with a multi-stage step-shaped multi-stage second accommodating hole; and

and sequentially embedding a plurality of second lenses into the multi-stage second accommodating holes.

The side surfaces of the multistage second accommodating holes are all round; the method comprises the steps of,

in the step of sequentially embedding the plurality of second lenses into the multi-stage second accommodating holes, each second lens and the corresponding one-stage second accommodating hole form close fit.

Wherein, in the multistage second accommodation hole, at least one stage of the second accommodation hole is a polygonal accommodation hole, the polygonal accommodation hole is provided with a second accommodation hole side surface and a second accommodation hole top surface, the second accommodation hole side surface is polygonal on a plane perpendicular to the optical axis of the optical lens, the second lens is provided with a second optical area for imaging and a second structural area surrounding the second optical area, and the outer side surface of the second structural area is circular; and

The step of sequentially embedding the plurality of second lenses into the multi-stage second accommodation holes further comprises: embedding at least one second lens into the corresponding polygonal accommodation hole; the second lens is embedded into the polygonal accommodating hole, close fit is formed between the side surface of the second accommodating hole and the contact part of the outer side surface of the second structural area, the top surface of the second structural area is supported against the top surface of the second accommodating hole, then adhesive glue is drawn between the outer side surface of the second structural area and the inner side surface of the second lens barrel, and then the adhesive glue is solidified to fix the second lens and the second lens barrel together.

forming a first lens with a gate part on the side surface through an injection molding process, wherein the gate part is a part corresponding to a filling port for injecting liquid molding material in the injection molding process;

cutting off the gate portion of the first lens to form a lens cutout surface on a side surface of the first lens;

forming a first barrel having the gate portion on a side surface thereof by an injection molding process; and

Cutting off the gate portion of the first barrel to form a barrel cutout surface at a side surface of the first barrel;

and in the step of fitting the first lens into the first accommodation hole, the lens cutout surface is provided on a side opposite to the barrel cutout surface.

Wherein, in the step of preparing the first lens part and the second lens part separated from each other, the molding method of the first lens barrel or the second lens barrel comprises:

preparing a mold, wherein the mold is provided with a movable side template, a fixed side template, a plurality of dental lamina sets and a mold core assembly, the movable side template and the fixed side template are detachably connected through the dental lamina sets, the mold core assembly is provided with a forming cavity formed by a movable mold core and a fixed mold core, and the shape of the forming cavity corresponds to that of the first lens cone or the second lens cone;

injecting hot-melted plastic into the forming cavity of the die to obtain a formed lens barrel; and

and cutting off the gate part of the formed lens barrel to obtain the first lens barrel or the second lens barrel.

According to still another aspect of the present invention, there is provided an image pickup module assembly method including assembling an optical lens by the optical lens assembly method described above; and manufacturing an image pickup module based on the assembled optical lens.

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

1. the invention can be provided with the glue overflow space on the first lens barrel, the glue overflow space is used for containing glue from the top surface of the lens, and the glue is used for fixing the lens barrel and the lens partially from the top end of the lens, so that the relative positions of the first lens barrel and the first lens are better fixed.

2. The first lens is in a polygon shape on the first lens barrel, and the first lens is in a round shape, wherein the size of the polygon is smaller than that of the lens, so that the first lens is tightly matched with the first lens barrel, and the strength between the first lens and the first lens barrel is enhanced.

3. The lens barrel is polygonal, the first lens is circular, the polygonal has a larger size than the circular, so that the first lens can be assembled into the first lens barrel more easily, the polygonal also has an interference relation with the circular, and the contact parts are arranged at equal intervals around the axis of the first lens barrel, so that the lens barrel can realize preset positioning during assembly.

4. The glue overflow space (glue containing space) provided by the invention increases the bonding area of the first lens barrel and the glue material, and also increases the bonding area of the first lens and the glue material, thereby increasing the bonding strength of the first lens and the first lens barrel.

5. The cut-out portion of the first lens of the present invention is disposed corresponding to the cut-out portion of the first barrel, thereby reducing deformation due to the dimensional difference.

6. The contact part of the outer side surface of the first lens (the contact part with the first lens)

Evenly distributed on the outer side surface, thereby evenly increasing the strength between the first lens barrel and the first lens and reducing the lens position deviation caused by the deformation of the lens barrel.

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 according to an embodiment of the present invention;

fig. 2 shows a schematic cross-sectional view of a first barrel of an optical lens according to an embodiment of the present invention;

FIG. 3 shows a schematic cross-sectional view of a first lens component of an optical lens according to one embodiment of the invention;

fig. 4A is a schematic cross-sectional view of a first barrel of an optical lens according to another embodiment of the present invention;

FIG. 4B illustrates a schematic cross-sectional view of an embodiment of the present invention taken based on section line A-A shown in FIG. 4A;

FIG. 5A shows a schematic cross-sectional view of a first lens component of an optical lens according to one embodiment of the invention;

FIG. 5B illustrates a schematic cross-sectional view of one embodiment of the present invention taken based on section line B-B shown in FIG. 5A;

FIG. 6 illustrates a cross-sectional view of an embodiment of the present invention with size indicia added based on the first lens component illustrated in FIG. 5B;

FIG. 7 is a schematic cross-sectional view of a first lens component of an optical lens according to still another embodiment of the present invention after painting;

FIG. 8 is a schematic top view of a casting first barrel according to an embodiment of the present invention;

FIG. 9A shows a cross-sectional view of a first lens casting according to one embodiment of the invention;

FIG. 9B illustrates a top view of a first lens cast molded according to one embodiment of the invention;

FIG. 10 shows a schematic cross-sectional view of a second lens component of an optical lens of an embodiment of the invention;

FIG. 11 shows a schematic cross-sectional view of a first lens component of an optical lens of an embodiment of the invention;

fig. 12A illustrates a top view of a first barrel of the first lens part of the optical lens of fig. 11 according to an embodiment of the present invention;

FIG. 12B illustrates a top view of a first lens component of the optical lens of FIG. 11 in accordance with one embodiment of the present invention;

FIG. 12C is a top view of the optical lens of FIG. 11 after painting of the first lens element according to one embodiment of the present invention;

FIG. 13 illustrates a bottom view of a first lens component of an optical lens of an embodiment of the present invention;

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

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

fig. 14C illustrates a relative position adjustment with increased v, w direction adjustment in active calibration in accordance with yet another embodiment of the present invention.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that 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 according to an embodiment of the present invention. 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 101 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 five second lenses 201 mounted in the second barrel 202, the five 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 the second barrel 202; and a first glue 300, located in a first gap 400 between the first lens component 100 and the second lens component 200, the first glue 300 being adapted to support and fix the first lens 101 and the second lens component 200 after curing, wherein an angle α between an axis 1001 of the first lens component 100 and an axis 2001 of the second lens component 200 is different from zero. 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. In this embodiment, the first adhesive 300 is disposed between the first lens 101 and the second lens barrel 202, alternatively in other embodiments the first adhesive 300 may be disposed between the first lens barrel 102 and the second lens barrel 202 and/or between the first lens 101, the first lens barrel 102 and the second lens barrel 202, alternatively in other embodiments the first adhesive 300 may be disposed between the first lens barrel 102 and the second lens 201 and/or between the first lens 101, the first lens barrel 102 and the second lens 201. 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. In the embodiment shown in fig. 1, the number of the first lenses 101 is one, but it is obvious to those skilled in the art that the number of the first lenses 101 may be two or more; similarly, the number of second lenses 201 is 5 in fig. 1, but it will be apparent to those skilled in the art that other numbers of second lenses 201 may be selected, and that 5 is only an example.

Fig. 2 shows a schematic cross-sectional view of the first barrel 102 of the optical lens according to the embodiment of the present invention. Wherein the section is a section through the optical axis of the optical lens. In this embodiment, the inner side of the first lens barrel 102 has a first accommodating hole 600, the first accommodating hole 600 has a first accommodating hole side surface 6011 and a first accommodating hole top surface 6012, and a light transmitting hole 700 is provided in a middle region of the first accommodating hole top surface 6012. Fig. 3 shows a schematic cross-sectional view of a first lens component 100 of an optical lens according to an embodiment of the invention. Wherein the section is a section through the optical axis of the optical lens. Referring to fig. 3, the first lens 101 may be inserted into the first receiving hole 600, the first lens 101 has a first optical zone 1011 for imaging and a first structural zone 1012 surrounding the first optical zone 1011, the first receiving hole side 6011 is tightly fitted with an outer side surface of the first structural zone 1012 and the first lens 101 is fixed with the first lens barrel 102 by an adhesive 103. The first lens 101 has a first outer side 1013, the first outer side 1013 including a contact portion and a non-contact portion, wherein the contact portion is in direct contact with the first accommodation hole side 6011 and forms a tight fit; the non-contact portion is not in direct contact with the first accommodation hole side surface 6011, and the non-contact portion is bonded to the first barrel 102 by the adhesive 103. The tight fitting of the present invention means that the distance from the side surface 6011 of the first receiving hole to the central axis 1001 of the first lens component 100 is smaller than the distance from the outer side surface of the first structural area 1012 to the central axis 1001 of the first lens component 100, so that the first lens 101 is suitable for being tightly mounted in the first receiving hole 600. Fig. 4A is a schematic longitudinal section view of the first barrel 102 of the optical lens according to an embodiment of the invention, wherein the longitudinal section refers to a section passing through the optical axis of the optical lens, and will not be described in detail. Fig. 4B shows a schematic cross-sectional view taken on the basis of the section line A-A shown in fig. 4A. Referring to fig. 4A and 4B, in the present embodiment, the first accommodating hole side surface 6011 has a polygonal shape on a plane perpendicular to the optical axis of the optical lens. Fig. 5A shows a schematic longitudinal section of the first lens component 100 of the optical lens according to the embodiment of the present invention. Fig. 5B shows a schematic cross-sectional view taken on the basis of the section line B-B shown in fig. 5A. Referring to fig. 5A and 5B, on a plane perpendicular to an optical axis of the optical lens, the first outer side 1013 of the first structural region 1012 is circular and has a diameter adapted to the shape and size of the first accommodation hole side 6011 that is polygonal (for example, the diameter of the outer side of the first structural region 1012 may be slightly larger than the diameter of an inscribed circle of the polygon, which may also be referred to as an inscribed circle) to form a close fit at a contact portion of the first accommodation hole side with the outer side of the first structural region, wherein the inscribed circle is a circle tangential to each side of the polygon. In this embodiment, the polygon may be a regular polygon, specifically a regular hexagon, and those skilled in the art can know that polygons with other numbers of sides may also be selected.

Referring to fig. 3, further, in this embodiment, the first receiving hole 600 includes a first receiving layer 601 and a first adhesive layer 602 located below the first receiving layer 601, the first receiving layer 601 has the first receiving hole side surface 6011 and the first receiving hole top surface 6012, the first receiving hole side surface 6011 has a height smaller than a thickness of the first structure area 1012, the first adhesive layer 602 has a first adhesive layer top surface 6022 and a first adhesive layer side surface 6021, a distance from the first adhesive layer side surface 6021 to the optical axis is greater than a distance from the first receiving hole side surface 6011 to the optical axis, a gap between the first outer side surface 1013 of the first structure area 1012, the first adhesive layer top surface 6022 and the first adhesive layer side surface 6021 forms a first adhesive area 800, and the adhesive 103 is disposed in the first adhesive area 800 to fix the first lens 101 and the first lens barrel 102 together. Referring to fig. 5A, a first adhesive receiving area 900 is formed between the first receiving hole side surface 6011, the first receiving hole top surface 6012 and the first outer side surface 1013 of the first structural area 1012, and the first adhesive receiving area 900 communicates with the first drawing area 800 to receive the overflowed adhesive 103.

Fig. 6 shows a schematic cross-sectional view with a size mark added based on the first lens component 100 shown in fig. 5B. Referring to fig. 6, a first distance D of the first receiving hole 600 is greater than a radius r of the first lens 101 inserted into the first receiving hole 600, wherein the first distance is a distance from a vertex of the polygon of the first receiving hole 600 to a center of the first receiving hole 600. The second distance d of the first receiving hole 600, which is the distance from the sides of the polygon of the first receiving hole 600 to the center of the first receiving hole 600, is smaller than the radius r of the first lens 101 inserted into the first receiving hole 600. Fig. 7 is a schematic cross-sectional view of the first lens component 100 after painting of the optical lens according to an embodiment of the present invention. The section of fig. 7 is a section taken on the basis of the section line C-C in fig. 3. Referring to fig. 7, the adhesive 103 in the first adhesive drawing area 800 is formed in a ring shape with a notch, and in the embodiment shown in fig. 7, the adhesive 103 has one notch, and those skilled in the art will understand that the notch may have two or more numbers. It should be noted that in another embodiment, the first lens barrel may not have a corresponding notch because the glass lens may not have the notch.

Further still referring to FIG. 6, in one embodiment, the first distance D is greater than the radius r of the first lens and D-D is 0.02mm or greater and the second distance D is less than the radius r of the first lens and r-D is 0.005mm or less.

In this embodiment of the present invention, the first lens 101 is tightly matched with the first accommodating hole 600, so that the first lens 101 can be tightly clamped on the first lens barrel 102, thereby facilitating installation; the side surface 6011 of the first accommodating hole of the first lens barrel 102 adopts a polygonal design, so that the first adhesive glue accommodating area 900 is arranged while the first lens 101 is arranged, overflowed glue materials can be accommodated, pollution to the first optical area 1011 of the first lens 101 is avoided, and the imaging quality of an optical system is ensured; the adhesive glue 103 connecting the first lens 101 and the first lens barrel 102 is in a notch painting mode, and has the function of exhausting air, so that the deformation of parts caused by the expansion of air can be avoided.

Fig. 8 is a schematic top view of the casting of the first lens barrel 102 according to the embodiment of the present invention. Referring to fig. 8, in general, in injection molding the first barrel 102, the gate 1021 is formed by cooling as a passage for molten plastic, and the gate 1021 and the excess plastic not formed need to be cut off and the plastic between the first barrel 102 needs to be cut off, thereby forming a barrel cutout surface 3000 at the end of the first barrel 102. In addition, in this process, the dimension of the first barrel 102 changes due to expansion with heat and contraction with cold, wherein the dimension change is small due to the relatively thin wall thickness and small shrinkage rate near the barrel cutout surface 3000; and also, because of the pressure loss at the portion away from the gate 1021, the shrinkage rate of the portion away from the cutout is larger than that of the portion close to the gate 1021. Similar problems exist with the first lens 101 during casting, on the same principle. Fig. 9A is a cross-sectional view of the first lens 101 according to the embodiment of the present invention, and fig. 9B is a top view of the first lens 101 according to the embodiment of the present invention after casting. Referring to fig. 9B, the first lens 101 has a lens cutout surface 2000. Based on the same principle as casting the first barrel 102, the first lens 101 has a larger shrinkage rate at a position distant from the lens cutout surface 2000. Still referring to fig. 5B, further in this embodiment, the first lens 101 has a first optical zone 1011 and a first structural zone 1012, the first structural zone 1012 having an extension. The first lens 101 is formed by an injection molding process and an outer side surface of the first lens 101 has a lens cut surface 2000, the lens cut surface 2000 being a cut surface formed by cutting off a gate 1015 of the first structural region 1012. The first barrel 102 is formed by an injection molding process and an outer side surface of the first barrel 102 has a barrel cutout surface 3000, which is a cutout surface formed by cutting off a gate portion 1021 of the first barrel 102. The gate portion is a portion corresponding to an inlet for injecting a liquid molding material in an injection molding process. In this embodiment, the lens cut surface 2000 is disposed on the opposite side of the lens barrel cut surface 3000, that is, the end of the first lens barrel 102 with a large shrinkage rate is disposed on the end of the first lens 101 with a small shrinkage rate, and the end of the first lens barrel 102 with a small shrinkage rate is disposed on the end of the first lens 101 with a large shrinkage rate. This design allows for dimensional compensation, thereby making the structure of the assembled first lens component more stable, helping to reduce secondary variations after active calibration.

Fig. 10 shows a schematic cross-sectional view of a second lens component 200 of an optical lens according to an embodiment of the invention. Wherein the section is a section through the optical axis of the optical lens. In this embodiment, further, the second accommodating hole may be formed on the inner side of the second lens barrel 202, the second lens 201 is embedded in the second accommodating hole, the second lens 201 has a second optical area for imaging and a second structural area surrounding the second optical area, the side surface of the second accommodating hole is tightly matched with the outer side surface of the second structural area, and the second lens 201 is fixed with the second lens barrel 202 through adhesive. The second accommodating hole inside the second lens barrel 202 may also include a second accommodating layer and a second photoresist layer, and the specific structure thereof is identical to that of the first accommodating hole 600 of the first lens barrel 102 in the embodiment shown in fig. 1, and will not be described again.

Further, in another embodiment of the present invention, 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.

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

Step S10, a preparation step. A first lens part 100 and a second lens part 200 separated from each other are prepared, wherein the first lens part 100 includes a first barrel 102 and at least one first lens 101 mounted within the first barrel 102, and the second lens part 200 includes a second barrel 202 and at least one second lens 201 mounted within 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 at least one first lens 101 and the at least one second lens 201 together form an imageable optical system.

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

Step S40, a bonding step. The first lens part 100 and the second lens part 200 are bonded to support and fix the relative positions of the first lens part 100 and the second lens part 200, wherein an included angle alpha which is different from zero is formed between the axes of the first lens part 100 and the second lens part 200.

Referring to fig. 3, in the present embodiment, in which the preparation step, the inner side of the first lens barrel 102 has a first receiving hole 600, the first receiving hole 600 has a first receiving hole side surface 6011 and a first receiving hole top surface 6012, the middle region of the first receiving hole top surface 6012 has a light passing hole 700, the first lens 101 is inserted into the first receiving hole 600, the first lens 101 has a first optical region 1011 for imaging and a first structural region 1012 surrounding the first optical region 1011, the first receiving hole side surface 6011 forms a tight fit with a first outer side surface 1013 of the first structural region 1012, and the first lens 101 is fixed with the first lens barrel 102 by an adhesive 103.

In one embodiment, the first receiving hole includes a first receiving layer and a first photoresist layer located under the first receiving layer, the first receiving layer has a side of the first receiving hole and a top of the first receiving hole, a height of the side of the first receiving hole is smaller than a thickness of the first structure region, the first photoresist layer has a top of the first photoresist layer and a side of the first photoresist layer, a distance from the side of the first photoresist layer to the optical axis is greater than a distance from the side of the first receiving hole to the optical axis, and a gap between the outer side of the first structure region, the top of the first photoresist layer, and the side of the first photoresist layer forms a first photoresist region, wherein step S10 may include sub-steps S101, S102, and S103. Steps S101, S102 and S103 are as follows:

In step S101, fig. 11 is a schematic cross-sectional view of a first lens component 100 of an optical lens according to an embodiment of the present invention. Wherein the section is a section through the optical axis of the optical lens. Referring to fig. 11, the first barrel 102 is inverted. Fig. 12A shows a top view of the first barrel 102 of the first lens part 100 of the optical lens of fig. 11, and the first accommodation hole side 6011 has a polygonal structure with reference to fig. 12A;

step S102, referring to fig. 11, the first lens 101 is inserted into the first accommodating hole 600, such that the top surface 6012 of the first accommodating hole contacts the top surface of the first structural area 1012 of the first lens 101, and the first optical area 1011 of the first lens 101 is located in the light transmitting hole 700. Fig. 12B shows a top view of the first lens part 100 of the optical lens of fig. 11, referring to fig. 12B, in which the lens cut surface 2000 of the first lens 101 is disposed on the opposite side of the lens barrel cut surface 3000 of the first lens barrel 102;

in step S103, fig. 12C shows a top view of the first lens component 100 of the optical lens of fig. 11, and referring to fig. 12C, the adhesive 103 is drawn toward the first adhesive layer 602 in the first adhesive drawing area 800, so as to bond the first lens 101 and the first lens barrel 102, where the adhesive 103 forms a ring shape with a notch.

Further, in one embodiment, step S101 includes identifying the first barrel 102, identifying the barrel cutout surface 3000 of the first barrel 102, and bringing the barrel cutout surface 3000 of the first barrel 102 at a predetermined position. Meanwhile, the first accommodating hole side surface 6011 of the first lens barrel 102 is identified, whether the first accommodating hole side surface 6011 is damaged or not is judged, whether the second distance d is larger than the radius r of the first lens 101 or not is judged, and if the first accommodating hole side surface 6011 is damaged or the second distance d is smaller than the radius r of the first lens 101, the first lens barrel 102 is judged to be a defective product.

Further, in one embodiment, step S102 includes identifying the first lens 101, identifying the lens cut surface 2000 of the first lens 101, and disposing the lens cut surface 2000 of the first lens 101 on a side opposite to the barrel cut surface 3000 of the first barrel 102.

Fig. 13 is a bottom view of the first lens component 100 of the optical lens according to an embodiment of the present invention, referring to fig. 13, further, step S103 draws the adhesive layer 103 to the first adhesive layer 602 in the first adhesive drawing area 800 to form a ring shape with a notch, where the notch is disposed corresponding to the vertex of the polygon.

In one embodiment, step S10 may include sub-steps S104 and S105. Steps S104 and S105 are as follows:

step S104, the second lens barrel 202 is inverted, wherein the inner side of the second lens barrel is provided with a multi-stage step-shaped multi-stage second accommodating hole, and the side surfaces of the multi-stage second accommodating hole are all round;

step S105, sequentially embedding a plurality of second lenses into the multi-stage second accommodating holes, where each second lens and the corresponding one of the multi-stage second accommodating holes form a close fit.

In one embodiment, among the plurality of stages of the second accommodation holes, at least one stage of the second accommodation hole is a polygonal accommodation hole having a second accommodation hole side surface and a second accommodation hole top surface, and the second accommodation hole side surface is polygonal on a plane perpendicular to an optical axis of the optical lens, the second lens has a second optical region for imaging and a second structural region surrounding the second optical region and an outer side surface of the second structural region is circular, wherein steps S104 and S105 may be replaced with steps S104, S105 and S106. Steps S104, S105 and S106 are as follows:

step S104, the second lens barrel 202 is inverted, wherein the side surface of the second accommodating hole is of a polygonal structure;

Step S105, embedding the second lens 201 into the first accommodating hole 600, so that the side surface of the second accommodating hole contacts with the outer side surface of the second structural area to form a tight fit, and the top surface of the second structural area is supported against the top surface of the second accommodating hole;

and step S106, drawing the adhesive to a gap between the outer side surface of the second lens 201 and the side surface of the first accommodation hole 600, so as to bond the second lens 201 and the second lens barrel 202, wherein the adhesive forms a ring shape with a notch.

In one embodiment, step S10 may include sub-steps S1001, S1002, S1003, and S1004. Steps S1001, S1002S, 1003, and S1004 are as follows:

step S1001, forming a first lens with a gate part on the side surface through an injection molding process, wherein the gate part is a part corresponding to a filling port for injecting liquid molding material in the injection molding process;

step S1002, cutting off a gate portion of the first lens, thereby forming a lens cutout surface on a side surface of the first lens;

step S1003 of cutting off the gate portion of the first barrel to form a barrel cutout surface on a side surface of the first barrel;

In step S1004, in the step of fitting the first lens into the first accommodation hole, the lens cutout surface is disposed on the opposite side to the barrel cutout surface.

According to an embodiment of the present invention, there is also provided a molding method of a lens barrel including:

step S100, preparing a die, wherein the die is provided with a movable side template, a fixed side template, a plurality of dental lamina sets and a die core assembly, the movable side template and the fixed side template are detachably connected through the dental lamina sets, the die core assembly is provided with a containing cavity formed by a movable die core and a fixed die core, and hot-melt plastics can form a lens cone with a polygonal shape in the containing cavity.

Step S200, injecting the hot-melted plastic into a mold with a polygonal shape;

step S300, cutting off the gate portion of the lens barrel, thereby forming a barrel cutout surface on a side surface of the lens barrel.

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

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.

Further, in another embodiment of the present invention, 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.

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 invention. 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. 14B illustrates rotational adjustment in active calibration in accordance with 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. 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 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 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 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, 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: 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.

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:

the first outer side surface includes:

a non-contact portion which is not in direct contact with the first accommodation hole side surface and which is bonded to the first barrel by an adhesive;

Wherein the first lens is formed by an injection molding process and an outer side of the first lens has a lens cut surface; the first lens barrel is formed through an injection molding process, and the outer side surface of the first lens barrel is provided with a lens barrel notch surface; and the lens cutout surface is provided on the opposite side to the lens barrel cutout surface.

2. The optical lens of claim 1, wherein the first receiving hole has a polygonal side surface, the first lens has a circular side surface, and the first lens and the first receiving hole are tightly fitted to each other at the contact portion.

3. The optical lens of claim 2, wherein the first receiving hole further has a first receiving hole top surface, a middle region of the first receiving hole top surface has a light passing hole, the first lens has a first optical area for imaging and a first structural area surrounding the first optical area and an outer side of the first structural area is circular, a top surface of the first structural area is supported against the first receiving hole top surface, and a diameter of an inscribed circle of a polygon of a side surface of the first receiving hole is smaller than a diameter of a circle of an outer side surface of the first structural area to form a close fit at a contact portion of the side surface of the first receiving hole and the outer side surface of the first structural area.

4. An optical lens as claimed in claim 3, wherein the area between the first accommodation hole side face, the first accommodation hole top face and the outer side face of the first structural region has the adhesive.

5. The optical lens of claim 4, wherein the polygon is a regular polygon.

6. The optical lens of claim 4, wherein the first receiving hole comprises a first receiving layer and a first glue layer positioned below the first receiving layer, the first receiving layer has a side of the first receiving hole and a top of the first receiving hole, the side of the first receiving hole has a height less than a thickness of the first structural region, the first glue layer has a top of the first glue layer and a side of the first glue layer, a distance from the side of the first glue layer to an optical axis is greater than a distance from the side of the first receiving hole to the optical axis, a gap between the top of the first glue layer and the side of the first glue layer forms a first glue region, and the glue is placed in the first glue region to fix the first lens and the first lens barrel together.

7. The optical lens of claim 6, wherein a first adhesive receiving area is formed between the first receiving hole side surface, the first receiving hole top surface and the outer side surface of the first structural area, and the first adhesive receiving area is communicated with the first adhesive drawing area to receive the adhesive.

8. The optical lens of claim 3, wherein a first distance of the first receiving hole is at least 0.015mm greater than a radius of the first lens into which the first receiving hole is embedded, wherein the first distance is a distance from a vertex of the polygon of the first receiving hole to a center of the first receiving hole.

9. An optical lens as claimed in claim 3, wherein the second distance of the first accommodation hole is smaller than the radius of the first lens inserted into the first accommodation hole to form a tight fit at the contact portion, and the difference between the radius of the first lens and the second distance is not more than 0.005mm, the second distance being the distance from the sides of the polygon of the first accommodation hole to the center of the first accommodation hole.

10. The optical lens of claim 6, wherein the adhesive in the first adhesive drawing area forms a ring with a notch.

11. The optical lens according to claim 2, wherein the second lens barrel has a second accommodation hole on an inner side thereof, the second lens is fitted into the second accommodation hole, the second lens has a second optical area for imaging and a second structural area surrounding the second optical area, the second accommodation hole side is tightly fitted with an outer side of the second structural area, and the second lens is fixed with the second lens barrel by the adhesive.

12. The optical lens of claim 1, 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 by active calibration.

13. A camera module, comprising: the optical lens of any one of claims 1-12.

14. An optical lens assembly method, comprising:

wherein in the preparing step, the inner side of the first lens barrel is provided with a first accommodating hole, the first accommodating hole is provided with a first accommodating hole side surface and a first accommodating hole top surface, the middle area of the first accommodating hole top surface is provided with a light passing hole, the first accommodating hole side surface is polygonal on a plane perpendicular to the optical axis of the optical lens, the first lens is provided with a first optical area for imaging and a first structural area surrounding the first optical area, the outer side of the first structural area is circular, the first lens is embedded in the first accommodating hole, a tight fit is formed at the contact part of the first accommodating hole side surface and the outer side of the first structural area, the top surface of the first structural area is supported on the first accommodating hole top surface, and an adhesive is further arranged between the outer side of the first structural area and the inner side of the first lens barrel so as to fix the first lens and the first lens together, wherein the first lens is embedded in the first accommodating hole and the first lens is provided with a notch through the injection molding process; the first lens barrel is formed through an injection molding process, and the outer side surface of the first lens barrel is provided with a lens barrel notch surface; and the lens cutout surface is provided on the opposite side to the lens barrel cutout surface.

15. The lens assembling method according to claim 14, wherein the first receiving hole includes a first receiving layer and a first paste layer located under the first receiving layer, the first receiving layer having the first receiving hole side and the first receiving hole top surface, the first receiving hole side having a height smaller than a thickness of the first structure region, the first paste layer having the first paste layer top surface and the first paste layer side, a distance from the first paste layer side to the optical axis being greater than a distance from the first receiving hole side to the optical axis, a gap between the outer side of the first structure region, the first paste layer top surface, and the first paste layer side forming a first paste region, in the step of preparing the first lens component and the second lens component to be separated from each other, further comprising:

inverting the first barrel;

16. The lens assembling method according to claim 14, wherein in the step of preparing the first lens component and the second lens component separated from each other, further comprising:

17. The lens assembling method according to claim 16, wherein sides of the multistage second accommodation holes are each circular; the method comprises the steps of,

18. The lens assembling method according to claim 16, wherein at least one stage of the second accommodation holes is a polygonal accommodation hole having a second accommodation hole side surface and a second accommodation hole top surface, and the second accommodation hole side surface is polygonal on a plane perpendicular to an optical axis of the optical lens, the second lens has a second optical region for imaging and a second structural region surrounding the second optical region and an outer side surface of the second structural region is circular; and

19. The lens assembling method according to claim 14, wherein in the step of preparing the first lens component and the second lens component separated from each other, further comprising:

20. The lens assembling method according to claim 14, wherein in the step of preparing the first lens part and the second lens part separated from each other, the molding method of the first barrel or the second barrel includes:

21. 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 any one of claims 14 to 20; and manufacturing an image pickup module based on the assembled optical lens.