Optical lens and corresponding camera module

Abstract

The present invention relates to an optical lens, comprising a first lens component including a first lens; a second lens component including a second lens, the second lens and the first lens together forming an imageable optical system; and a first adhesive material for bonding the first lens component and the second lens component, the first adhesive material surrounding the optical axis of the first lens or the second lens, and arranged in a ring shape with a notch. The present invention also provides a corresponding camera module. The present invention uses intermittent adhesive application to provide the first adhesive material with one or more notches, thereby preventing deformation or displacement of the first lens component or the first lens due to gas expansion during baking.

Description

[0001] Related applications

[0002] This application is a divisional application of the parent application entitled “Optical lens, camera module and assembly method thereof” and filed on April 28, 2018 with Chinese patent application number CN201810403069.7. Technical Field

[0003] The present invention relates to the field of optical imaging technology, and in particular to an optical lens and a corresponding camera module. Background Art

[0004] With the popularization of mobile electronic devices, the relevant technologies of camera modules used in mobile electronic devices to help users obtain images (such as videos or images) have developed and progressed rapidly. In recent years, camera modules have been widely used in many fields such as medical care, security, industrial production, etc.

[0005] To meet increasingly broad market demands, high pixel count, small size, and large aperture are the irreversible development trends for existing camera modules. However, achieving these three requirements within the same camera module is extremely challenging. For example, the increasing compactness of mobile phones and the increase in screen-to-body ratios have reduced the space available for front-facing camera modules, while the market is placing ever-higher demands on camera module image quality.

[0006] In the field of compact camera modules (such as those used in mobile phones), the quality of the optical imaging lens and the manufacturing errors during the module packaging process often need to be considered. Specifically, during the manufacturing process of optical imaging lenses, factors affecting the lens resolution come from errors in the components and their assembly, errors in the thickness of the lens spacer elements, errors in the assembly and fit of the lenses, and changes in the refractive index of the lens material. Among them, the errors in the components and their assembly include errors in the optical surface thickness of each lens monomer, the lens optical surface sag, the optical surface shape, the radius of curvature, the single-sided and inter-face eccentricity of the lens, the tilt of the lens optical surface, etc. The magnitude of these errors depends on the mold precision and the ability to control the molding precision. The error in the thickness of the lens spacer elements depends on the processing accuracy of the components. The error in the assembly and fit of the lenses depends on the dimensional tolerance of the assembled components and the assembly accuracy of the lenses. The error introduced by the change in the refractive index of the lens material depends on the stability of the material and the batch consistency. The errors of the above-mentioned components that affect the resolution are cumulative and worsen, and this cumulative error will continue to increase with the increase in the number of lenses. Existing solutions for improving resolution rely on controlling the tolerances of relatively sensitive components and compensating for lens rotation to improve resolution. However, high-pixel, large-aperture lenses are highly sensitive and require stringent tolerances. For example, a 1µm lens decentration in some sensitive lenses can result in a 9° image plane tilt, making lens processing and assembly increasingly difficult. Furthermore, long feedback cycles during assembly result in low and highly volatile process capability indexes (CPKs) for lens assembly, leading to high defect rates. Furthermore, because lens resolution is influenced by numerous factors, encompassing multiple components, the control of each factor is subject to manufacturing precision limits. Simply improving the precision of individual components is limited, costly, and unable to meet the market's ever-increasing demands for image quality.

[0007] The applicant has proposed 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. This solution can improve the process capability index (CPK) of mass-produced optical lenses or camera modules; it can relax the requirements for the accuracy of various components of materials (such as sub-lenses or photosensitive components used to assemble optical lenses or camera modules) and their assembly accuracy, thereby reducing the overall cost of optical imaging lenses and camera modules; it can make real-time adjustments to various aberrations of the camera module during the assembly process, reduce the defect rate, reduce production costs, and improve imaging quality.

[0008] However, active calibration of the optical system of the lens itself is a new production process. Actual mass production needs to consider many factors such as the reliability, drop resistance, weather resistance and production cost of the optical lens and camera module. Sometimes it is also necessary to face the yield reduction caused by various unpredictable factors. For example, in one process scheme, glue is filled between the first lens component and the second lens component to keep the first lens component and the second lens component in the relative position determined by the active calibration. However, actual trial production found 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. This degradation sometimes exceeds the tolerance range, resulting in defective products. The applicant's research found that after the active calibration process is introduced in the assembly of the optical lens or camera module, variations in glue, lens barrel or lens and other unknown factors may be the cause of the above problems. There is an urgent need for solutions that can overcome the above problems in order to further improve product yield. Summary of the Invention

[0009] The present invention aims to provide a solution that overcomes at least one of the drawbacks of the prior art.

[0010] According to one aspect of the present invention, an optical lens is provided, comprising: a first lens component including a first lens element having a first optical zone for optical imaging and a first structural zone outside the first optical zone; a second lens component including a second lens barrel and at least one second lens element mounted on the second lens barrel; the second lens element having a second optical zone for optical imaging and a second structural zone outside the second optical zone, the second structural zone and the second lens barrel forming a structural zone of the second lens component, a first gap being defined between a top surface of the structural zone of the second lens component and a bottom surface of the first structural zone, the second lens element and the first lens element together forming an imageable optical system; and a first adhesive material located in the first gap to bond the first lens element and the second lens component; wherein the first adhesive material extends outwardly along the top surface of the structural zone of the second lens component and surrounds the first structural zone, and the outwardly extending first adhesive material wraps at least a portion of an outer side surface of the first structural zone; the first adhesive material is configured into a ring having four notches, and a plurality of segments of the first adhesive material separated by the notches are arranged in an axially symmetrical state.

[0011] Wherein, the first adhesive material also covers the top surface of the first structural area.

[0012] The first lens component further includes a first lens barrel, which surrounds the first lens and blocks the light from the outside that is directed toward the outer side surface and top surface of the first structural area.

[0013] The first adhesive material is suitable for supporting and fixing the first lens and the second lens component so that the relative position of the first lens and the second lens component is maintained at a relative position determined by active calibration.

[0014] During the active calibration process, the first lens is clamped by a clamp from its side, and the notch of the first adhesive material is matched with the clamp to form a gap for the clamp to pass through.

[0015] According to another aspect of the present application, a camera module is also provided, which includes: the optical lens described in any of the aforementioned solutions; and a photosensitive component.

[0016] Compared with the prior art, this application has at least one of the following technical effects:

[0017] 1. In some embodiments of the present invention, the first adhesive material (adhesive material for bonding the first and second lens components) is applied intermittently, so that the first adhesive material has one or more gaps, thereby preventing deformation or displacement of the first lens component or the first lens due to gas expansion during baking.

[0018] 2. In some embodiments of the present invention, a first lens barrel can be added to the first lens to form an aperture, thereby making the appearance of the optical lens barrel more regular and beautiful.

[0019] 3. In some embodiments of the present invention, the position offset or deformation of the first lens caused by the variation of the first lens barrel can be suppressed, thereby making the resolution of the actual product of the optical lens (or camera module) based on active calibration closer to the resolution obtained by active calibration.

[0020] 5. In some embodiments of the present invention, the first adhesive material can be applied in a single coat to wrap the side surfaces of the first lens and / or cover the top surface of the structured area of ​​the first lens, thereby reducing the number of process steps.

[0021] 6. In some embodiments of the present invention, the first adhesive can be used to wrap the side of the first lens, so that the resolution of the actual product of the optical lens (or camera module) based on active calibration is closer to the resolution obtained by active calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional schematic diagram of an optical lens according to an embodiment of the present invention is shown;

[0023] Figure 2 Shown in Figure 1 A schematic diagram of adding a first adhesive material 300 to wrap all outer side surfaces 1014 of the first structural area 1012 and cover the top surface 1015 of the first structural area 1012;

[0024] Figure 3 Shows the Figure 2 A schematic diagram of baking the intermediate so that all the first adhesive materials 300 are permanently solidified and integrated;

[0025] Figure 4 A schematic cross-sectional view of an optical lens according to another embodiment of the present invention is shown;

[0026] Figure 5 Shown in Figure 4 A schematic diagram of adding a first adhesive material 300 to wrap all outer side surfaces of the first structural area 1012 and cover the top surface of the first structural area 1012;

[0027] Figure 6 Shows the Figure 5 A schematic diagram of baking the intermediate so that all the first adhesive materials 300 are permanently solidified and integrated;

[0028] Figure 7 A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0029] Figure 8 Shown in Figure 7 A schematic diagram of adding a first adhesive material 300 to wrap all outer side surfaces 1014 of the first structural area 1012 and cover the top surface 1015 of the first structural area 1012;

[0030] Figure 9 Shows the Figure 8 The schematic diagram of the semi-finished product after baking so that all the first adhesive materials 300 are permanently solidified and integrated;

[0031] Figure 10 A schematic diagram showing an embodiment of the present invention after adhesive is applied to the periphery of the first adhesive material 300 and the top surface 1015 of the first structure area 1012 of the first lens 101;

[0032] Figure 11 A schematic diagram showing the first lens barrel 102 being moved above the first lens 101 and then gradually approaching the first lens 101 is shown;

[0033] Figure 12 Schematic diagram showing the first lens barrel 102 contacting the added first adhesive 300;

[0034] Figure 13 A schematic diagram showing the first adhesive 300 filling the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102 is shown;

[0035] Figure 14A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0036] Figure 15A A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0037] Figure 15B An improved first lens 101 is shown;

[0038] Figure 16 The semi-finished product state after completing step S402 in one embodiment of the present invention is shown;

[0039] Figure 17 An embodiment of the present invention shows Figure 16 Schematic diagram of the semi-finished product being exposed to light to pre-cure the first adhesive material 300;

[0040] Figure 18 FIG. 1 shows a cross-sectional schematic diagram of painting a second adhesive material 500 on the top surface of the second lens barrel 202 in one embodiment of the present invention;

[0041] Figure 19A FIG. 2 shows a schematic top view of an exemplary top surface of the second lens barrel 202;

[0042] Figure 19B Shown Figure 19A A partial enlarged schematic diagram of the AA' section in FIG.

[0043] Figure 20A A schematic diagram showing the process of applying glue on the top surface of the second lens barrel 202 in one embodiment of the present invention is shown;

[0044] Figure 20B Shown Figure 20A A partial enlarged schematic diagram of the AA' section in FIG.

[0045] Figure 21 A schematic diagram showing how the first lens barrel 102 is moved above the first lens 101 and then gradually approaches the first lens 101 in one embodiment of the present invention;

[0046] Figure 22 A schematic diagram showing the bottom surface of the first lens barrel 102 in contact with the added second adhesive 500 in one embodiment of the present invention is shown;

[0047] Figure 23 FIG. 1 is a schematic diagram showing exposure of the second adhesive material 500 in one embodiment of the present invention;

[0048] Figure 24 The semi-finished product state after pre-curing is completed in one embodiment of the present invention is shown;

[0049] Figure 25A A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0050] Figure 25B shows a first lens 101 in yet another embodiment of the present invention;

[0051] Figure 26 A schematic diagram showing a process of painting a first adhesive material on the top surface of the structural area of ​​the second lens component in another embodiment of the present invention is shown;

[0052] Figure 27 It shows that the first adhesive material in one embodiment of the present invention adopts the adhesive drawing method of drawing and breaking adhesive;

[0053] Figure 28 Shown with Figure 27 The arrangement of the jaws corresponding to the glue painting method shown;

[0054] Figure 29 An example of interference between the first lens barrel and the first lens is shown;

[0055] Figure 30 An example of avoiding interference between the first lens barrel and the first lens by making the difference between the included angle B and the included angle A smaller than a preset threshold is shown;

[0056] Figure 31 A schematic diagram showing an embodiment of the present invention in which the top surface of the first structural area is configured as an inclined surface;

[0057] Figure 32A shows a relative position adjustment method in active calibration in one embodiment of the present invention;

[0058] Figure 32B shows the rotation adjustment in active calibration of another embodiment of the present invention;

[0059] Figure 32C It shows a relative position adjustment method with added v and w direction adjustments in active calibration of another embodiment of the present invention. DETAILED DESCRIPTION

[0060] 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 descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0061] It should be noted that in this specification, the expressions of first, second, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of this application, the first subject discussed below can also be referred to as the second subject.

[0062] In the accompanying drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The accompanying drawings are only examples and are not drawn strictly to scale.

[0063] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, integers, steps, operations, elements, and / or parts, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0064] As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation, not degree, and are intended to account for the inherent variations in measurements or calculations that would be recognized by those having ordinary skill in the art.

[0065] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0066] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0067] Figure 1A schematic cross-sectional view of an optical lens according to an embodiment of the present invention is shown. The cross-sectional view is a cross-sectional view passing through the optical axis of the optical lens. In this embodiment, the optical lens comprises a first lens assembly 100, a second lens assembly 200, and a first adhesive 300. The first lens assembly 100 comprises a first lens element 101 having a first optical zone 1011 for optical imaging and a first structural zone 1012 outside the first optical zone 1011. The second lens component 200 includes a second lens barrel 202 and four second lenses 201 installed in the second lens barrel 202. The four second lenses 201 and the first lens 101 together constitute an imageable optical system. The second lens 201 has a second optical area 2011 for optical imaging and a second structural area 2012 outside the second optical area 2011. The second structural area 2012 and the second lens barrel 202 constitute the structural area of ​​the second lens component 200, and a first gap 400 is provided between the top surface 2021 of the structural area of ​​the second lens component 200 and the bottom surface 1013 of the first structural area 1012. In this embodiment, since the second lens barrel 202 completely blocks the second structural area 2012, the top surface of the second structural area 2012 is not exposed to the outside. Therefore, in this embodiment, the top surface 2021 of the structural area of ​​the second lens component 200 is actually the top surface of the second lens barrel 202 (it should be noted that in other embodiments, the top surface 2021 of the structural area of ​​the second lens component 200 can be composed of the top surface of the second lens barrel 202 and the top surface of the second structural area 2012 of the second lens 201). The top surface of the second lens barrel 202 is a flat surface. It should be noted that in other embodiments, the top surface of the second lens component 200 can be composed of the top surface of the second lens barrel 202 and the top surface of the second structural area 2012. Still referring to Figure 1 In this embodiment, the first adhesive material 300 is located in the first gap 400 and extends outward along the top surface 2021 of the structural area of ​​the second lens component 200 to surround the first structural area 1012. The outwardly extending first adhesive material 300 wraps at least a portion of the outer surface 1014 of the first structural area 1012 (in this embodiment, the first adhesive material 300 does not wrap the entire outer surface 1014 of the first structural area 1012). The first adhesive material 300 is suitable for supporting and fixing the first lens 101 and the second lens component 200, so that the relative position of the first lens 101 and the second lens component 200 is maintained at the relative position determined by active calibration.

[0068] Figure 4 A schematic cross-sectional view of an optical lens according to another embodiment of the present invention is shown. The cross-sectional view is a cross-sectional view passing through the optical axis of the optical lens. In this embodiment, the first adhesive 300 wraps the entire outer surface 1014 of the first structural area 1012. Further, Figure 7 FIG1 shows a cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention. Figure 7 In the illustrated embodiment, the first adhesive 300 wraps around the entire outer surface 1014 of the first structural area 1012 and also covers the top surface 1015 of the first structural area 1012. The applicant has discovered that in an optical lens assembly solution based on active calibration technology, the shapes and positions of the first lens 101 and the second lens 201 may undergo secondary variations after the active calibration is completed. Specifically, secondary variations can be, for example, changes in the optical system of an actual product (e.g., an optical lens or camera module) relative to the optical system determined by active calibration (step 30) during the curing process of the first adhesive 300 or after long-term use. Such changes can lead to deterioration in the product's imaging quality. The applicant has further discovered that, compared to a solution where the first adhesive 300 is only filled between the bottom surface of the first lens 101 and the top surface of the second lens assembly 200, when the first adhesive 300 wraps around the side of the first lens 101, the actual product's resolution is closer to the resolution obtained by active calibration. Therefore, this design where the first adhesive 300 wraps around the side of the first lens 101 helps improve product yield.

[0069] Figure 3 A schematic cross-sectional view of an optical lens according to another embodiment of the present invention is shown. The cross-sectional view passes through the optical axis of the optical lens. In this embodiment, the first adhesive 300 is black and covers the outer side surface 1014 and top surface 1015 of the first structural region 1012 to form an aperture.

[0070] Figure 14 A schematic cross-sectional view of an optical lens according to another embodiment of the present invention is shown. The cross-sectional view is a cross-sectional view passing through the optical axis of the optical lens. In this embodiment, the first lens assembly 100 further includes a first lens barrel 102, which surrounds the first lens 101 and blocks light from the outside that is directed toward the outer side surface 1014 and top surface 1015 of the first structural area 1012. Furthermore, the first adhesive 300 fills the gap between the outer side surface 1014 and top surface 1015 of the first lens 101 and the first lens barrel 102.

[0071] Figure 15A FIG1 shows a cross-sectional schematic diagram of an optical lens of another embodiment of the present invention. The cross section is a cross section passing through the optical axis of the optical lens. Figure 14 Based on the embodiment shown, the first lens 101 is improved. Figure 15BAn improved first lens 101 is shown. In this embodiment, a top surface 1015 of the first structural zone 1012 of the first lens 101 has a glue overflow groove 1013 , and the glue overflow groove 1013 is located at one end of the first optical zone 1011 of the first lens 1011 .

[0072] Figure 25A A schematic cross-sectional view of an optical lens according to another embodiment of the present invention is shown. The cross-sectional view is a cross-sectional view passing through the optical axis of the optical lens. In this embodiment, the optical lens includes a first lens barrel 102, a second adhesive material 500 being provided between a bottom surface 1021 of the first lens barrel 102 and a top surface 2021 of the second lens barrel 202, and the first lens barrel 102 being bonded to the second lens barrel 202 via the second adhesive material 500. A cavity 1022 is provided between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102. In this embodiment, the second lens assembly 200 has an escape channel connecting the cavity 1022 to the outside world. In this embodiment, the escape channel is formed by providing an escape groove 600 on the top surface of the second lens barrel 202. Figure 19A FIG. 2 shows a schematic top view of an exemplary top surface of the second lens barrel 202. Figure 19A The top surface of the second lens barrel 202 has an air escape groove 600. For the sake of simplicity and clarity, Figure 19A The direction and location of the gas escape groove 600 are only schematically shown. The direction of the gas escape groove 600 can be a groove along the radial direction of the second lens barrel 202. Figure 19B Shown Figure 19A A partial enlarged schematic diagram of the AA' section in FIG. Figure 19B The gas escape groove 600 includes a venting sub-groove 601 and two glue blocking sub-grooves 602 located on both sides of the venting sub-groove 601. Figure 18 FIG. 2 shows a cross-sectional view of painting the second adhesive material 500 on the top surface of the second lens barrel 202. Figure 20A Schematic diagram of applying glue on the top surface of the second lens barrel 202 is shown. It can be seen that the second glue material 500 forms a ring with a gap on the top surface of the second lens barrel 202, and the gap is located at the position of the air escape groove 600. Figure 20B Shown Figure 20AThe partially enlarged schematic diagram of the AA' section in the figure. The glue blocking sub-groove 602 accommodates the overflowed second glue material 500, so that the vent sub-groove 601 is not blocked by the second glue material 500, thereby ensuring that the second glue material 500 has a gap. In this way, during the baking stage, the cavity 1022 can be connected to the outside world through the gap between the vent sub-groove 601 and the second glue material 500, avoiding the expansion of the air in the cavity 1022 and causing the first lens 101 to be misaligned or deformed, thereby ensuring the imaging quality of the optical lens based on active calibration. On the other hand, the design of the above-mentioned escape groove 600 can reduce glue painting errors caused by careless operation (for example, accidentally forming the second glue material 500 into a completely closed ring), which helps to improve the yield in mass production.

[0073] It should be noted that in other embodiments, the escape channel may also be provided in the first lens assembly 100, or may be formed by the first lens assembly 100 and the second lens assembly 200. The escape channel may include an escape groove 600 located on the top surface 2021 of the second lens barrel 202 and / or an escape groove 600 located on the bottom surface 1021 of the first lens barrel 102.

[0074] Figure 25B FIG. 1 shows a first lens 101 in another embodiment of the present invention. In this embodiment, Figure 25B The improved first lens 101 shown replaces Figure 3 The first lens 101 in the optical lens. In this embodiment, the top surface 1015 of the first structural area 1012 of the first lens 101 is inclined, and the end of the top surface 1015 of the first structural area 1012 close to the first optical area 1011 is higher than the end close to the outer side surface 1014 of the first structural area 1012. When the first adhesive 300 is located on the top surface 1015 of the first structural area 1012 (for example, when the first adhesive 300 covers the top surface 1015 of the first structural area 1012), the adhesive will automatically flow to the cavity 1022, thereby avoiding contamination of the optical area of ​​the first lens 101 and causing product defects. In another embodiment, it can also be used Figure 15B The first lens 101 shown is replaced Figure 25A The first lens 101 in the embodiment can also avoid contamination of the optical area of ​​the first lens 101 and cause product defects.

[0075] On the basis of the above embodiments, further, a corresponding camera module is also provided, which may include the optical lens described in any one of the above embodiments. Specifically, the camera module may include an optical lens and a photosensitive component. The optical lens may be the optical lens in any of the aforementioned embodiments. In this embodiment, the first adhesive 300 wraps the side of the first lens 101, so that the actual resolution of the produced camera module is closer to the resolution obtained by active calibration, which helps to improve the product yield. The camera module may also include a motor (or other type of optical actuator), the optical lens may be installed in the cylindrical carrier of the motor, and the base of the motor is installed on the top surface of the photosensitive component. Furthermore, the photosensitive component may, for example, include a circuit board, a photosensitive chip installed on the surface of the circuit board, an annular support formed or installed on the surface of the circuit board and surrounding the photosensitive chip, and a color filter. The annular support may form a step, and the color filter is installed on the step of the annular support. The base of the motor is installed on the top surface of the annular support.

[0076] Furthermore, according to one embodiment of the present invention, there is provided an optical lens assembly method, comprising:

[0077] Step S10, preparation step. Prepare a first lens assembly 100 and a second lens assembly 200 that are separated from each other. The first lens assembly 100 includes a first lens element 101, the first lens element 101 having a first optical zone 1011 for optical imaging and a first structural zone 1012 outside the first optical zone 1011. The second lens assembly 200 includes a second lens barrel 202 and four second lenses 201 installed in the second lens barrel 202. The four second lenses 201 have a second optical zone 2011 for optical imaging and a second structural zone 2012 outside the second optical zone 2011. The second structural zone 2012 and the second lens barrel 202 constitute the structural zone of the second lens assembly 200.

[0078] Step S20, pre-positioning step: The second lens assembly 200 pre-positions the first lens assembly 100 and the second lens assembly 200, so that the first lens 101 and the four second lenses 201 together form an imaging optical system.

[0079] Step S30 is an active calibration step, in which the relative positions of the first lens component 100 and the second lens component 200 are adjusted and determined based on the active calibration.

[0080] Step S40, a bonding step. The first lens 101 and the second lens component 200 are bonded together using a first adhesive 300, wherein a first gap 400 is defined between the top surface of the structural region of the second lens component 200 and the bottom surface of the first structural region 1012. The first adhesive 300 is located in the first gap 400 and extends outwardly along the top surface of the structural region of the second lens component 200 to surround the first structural region 1012. The outwardly extending first adhesive 300 wraps around at least a portion of the outer side surface of the first structural region 1012. After the first adhesive 300 is cured, the first lens 101 and the second lens component 200 are fixed and maintained in the relative position determined by the active calibration. Figure 1 FIG. 1 shows a cross-sectional schematic diagram of an optical lens according to an embodiment of the present invention. It can be seen that Figure 1 In the illustrated embodiment, the first adhesive material 300 does not cover the entire outer side surface 1014 of the first structural region 1012 . Figure 4 FIG2 is a cross-sectional schematic diagram showing an optical lens according to another embodiment of the present invention. Figure 4 In the illustrated embodiment, the first adhesive material 300 wraps the entire outer side surface 1014 of the first structural area 1012 . Figure 7 FIG2 is a cross-sectional schematic diagram showing an optical lens according to another embodiment of the present invention. Figure 7 In the illustrated embodiment, the first adhesive material 300 wraps around the entire outer side surface 1014 of the first structural region 1012 and covers a portion of the top surface 1015 of the first structural region 1012 .

[0081] The applicant has found that in the optical lens assembly scheme based on active calibration technology, the shapes and positions of the first lens 101 and the second lens 201 may undergo secondary variations after the active calibration is completed. Specifically, the secondary variation can be, for example, the change in the optical system of the actual product (such as an optical lens or camera module) relative to the optical system determined by the active calibration (step 30) during the curing process of the first adhesive 300 or after long-term use. This change will lead to deterioration of the imaging quality of the product. The applicant further found that, compared with the scheme in which the first adhesive 300 is only filled between the bottom surface of the first lens 101 and the top surface of the second lens component 200, when the first adhesive 300 wraps the side of the first lens 101, the resolution of the actual product is closer to the resolution obtained by active calibration. Therefore, the design of the first adhesive 300 wrapping the side of the first lens 101 helps to improve the product yield.

[0082] Furthermore, in one embodiment, the bonding step (step S40) includes:

[0083] S401, a glue application step: a liquid first glue material 300 is applied on the top surface 2021 of the structural area of ​​the second lens component 200.

[0084] S402, a positioning step based on the active calibration result: the first lens 101 is moved above the second lens component 200, then gradually approaches the second lens component 200 and contacts the first adhesive 300, and the relative position of the first lens 101 and the second lens component 200 is adjusted to the relative position determined by the active calibration, wherein the arranged liquid first adhesive 300 is located at least in the first gap 400.

[0085] S403, pre-curing step. After S402 is completed, the first adhesive material 300 is pre-cured. During the pre-curing process, the first lens 101 and the second lens component 200 are maintained in the relative position determined by active calibration by relying on an external capturing mechanism and / or a fixed platform. For example, an external capturing mechanism (such as a fixture) captures the first lens 101, and a fixed platform fixes the second lens component 200. The external capturing mechanism can be adjusted in multiple degrees of freedom (such as six-axis adjustment). After pre-curing, the first lens 101 and the second lens component 200 are maintained in the relative position determined by active calibration by relying on the pre-cured first adhesive material 300. Further, in one embodiment, the pre-curing step can be an exposure process for the first adhesive material 300.

[0086] S404, permanent curing step. The first adhesive material 300 is permanently cured to obtain a finished optical lens. In one embodiment, the permanent curing step may be baking the pre-cured assembly of the first adhesive material 300, the first lens element 101, and the second lens assembly 200 to permanently cure the first adhesive material 300.

[0087] It should be noted that, in one embodiment, the order of step S401 and step S30 can be interchanged, and step S30 can be combined with step S402 for execution.

[0088] Furthermore, in one embodiment, in step S402, the liquid first adhesive 300 may be placed only in the first gap 400. Between steps S403 and S404, the liquid first adhesive 300 may be added to the periphery of the pre-cured first adhesive 300, so that the first structural area 1012 of the first lens 101 is wrapped by the first adhesive 300. The wrapping may be as follows: Figure 1 The first structural area 1012 is partially wrapped on the side, and can also be as shown. Figure 4 The first structural area 1012 is shown as being fully wrapped on its side, or it can be as follows Figure 5 As shown, the side surfaces of the first structural area 1012 are completely wrapped and the top surface of the first structural area 1012 is covered. Finally, step S404 is performed to permanently cure the first adhesive material 300 to obtain a finished optical lens.

[0089] Furthermore, in one embodiment, Figure 1 Based on the embodiment shown, an optical lens with a first adhesive material 300 as a stop is manufactured, which includes: Figure 1 On the basis of the first adhesive material 300 (the first adhesive material 300 can be black) is added to wrap all the outer side surfaces of the first structural area 1012 and cover the entire top surface of the first structural area 1012; and after baking, all the first adhesive material 300 is permanently solidified and integrated, thereby obtaining an optical lens with the first adhesive material 300 as the aperture. This solution helps reduce stray light in the optical lens. Figure 2 and Figure 3 Shown in Figure 1 The process of making the first adhesive material 300 as an optical lens with an aperture based on the embodiment shown. Figure 2 Shown in Figure 1 Schematic diagram of adding a first adhesive material 300 to the first structural region 1012 to wrap all outer side surfaces 1014 and cover the top surface 1015 of the first structural region 1012. The first adhesive material 300 can be black. The added first adhesive material 300 covers the entire top surface 1015 of the first structural region 1012 to form an aperture. Figure 3 Shows the Figure 2 Schematic diagram of baking the intermediate so that all the first adhesive materials 300 are permanently solidified and integrated.

[0090] Furthermore, in another embodiment, Figure 4 Based on the embodiment shown, an optical lens with a first adhesive material 300 as a stop is manufactured, which includes: Figure 4 On the basis of the first adhesive material 300 (the first adhesive material 300 can be black) is added to wrap all the outer side surfaces of the first structural area 1012 and cover the entire top surface of the first structural area 1012; and after baking, all the first adhesive material 300 is permanently solidified and integrated, thereby obtaining an optical lens with the first adhesive material 300 as the aperture. This solution helps reduce stray light in the optical lens. Figure 5 and Figure 6 Shown in Figure 4 The process of making the first adhesive material 300 as an optical lens with an aperture based on the embodiment shown. Figure 5 Shown in Figure 4 Schematic diagram of adding a first adhesive material 300 to the first structural region 1012 to wrap all outer side surfaces and cover the top surface of the first structural region 1012. The first adhesive material 300 can be black. The added first adhesive material 300 covers the entire top surface 1015 of the first structural region 1012 to form an aperture. Figure 6 Shows the Figure 5Schematic diagram of baking the intermediate so that all the first adhesive materials 300 are permanently solidified and integrated.

[0091] Furthermore, in yet another embodiment, Figure 7 Based on the embodiment shown, an optical lens with a first adhesive material 300 as a stop is manufactured, which includes: Figure 7 On the basis of the first adhesive material 300 (the first adhesive material 300 can be black) is added to wrap all the outer side surfaces of the first structural area 1012 and cover the entire top surface 1015 of the first structural area 1012; and after baking, all the first adhesive material 300 is permanently solidified and integrated, thereby obtaining an optical lens with the first adhesive material 300 as the aperture. This solution helps reduce stray light in the optical lens. Figure 8 and Figure 9 Shown in Figure 7 The process of making the first adhesive material 300 as an optical lens with an aperture based on the embodiment shown. Figure 8 Shown in Figure 7 Schematic diagram of adding a first adhesive material 300 to the first structural region 1012 to wrap all outer side surfaces 1014 and cover the top surface 1015 of the first structural region 1012. The first adhesive material 300 can be black. The added first adhesive material 300 covers the entire top surface 1015 of the first structural region 1012 to form an aperture. Figure 9 Shows the Figure 8 The schematic diagram shows that the semi-finished product is baked so that all the first adhesive materials 300 are permanently solidified and integrated.

[0092] In the above, as the basis for making the first adhesive material 300 as the optical lens of the aperture Figure 1 、 Figure 4 、 Figure 7 The optical lens shown can be a finished product that has completed the permanent curing step (S404); or it can be a semi-finished product that has completed the pre-curing step but not the permanent curing step (S404). In this case, after adding the first adhesive 300, the permanent curing of the entire first adhesive 300 can be completed by baking once.

[0093] Furthermore, according to one embodiment of the present invention, a method for manufacturing an optical lens having a first lens barrel 102 is also provided. Adding the first lens barrel 102 can make the appearance of the optical lens more regular and aesthetically pleasing, while also protecting the first lens element 101 and reducing the impact of external impacts on the optical system. The first lens barrel 102 can also serve as an aperture, thereby reducing the impact of external stray light on imaging quality. In this embodiment, the method for manufacturing the optical lens includes:

[0094] In step S100 , a semi-finished optical lens based on active calibration is manufactured based on steps S10 - S40 , and then glue is applied to the periphery of the first glue 300 and the top surface 1015 of the first structural area 1012 of the first lens 101 , for example, by adding liquid first glue 300 . Figure 10 A schematic diagram shows, in one embodiment of the present invention, adhesive applied to the periphery of the first adhesive material 300 and the top surface 1015 of the first structural region 1012 of the first lens 101. In this step, the semi-finished product produced in steps S10-S40 may have undergone a permanent curing process (e.g., baking) or a pre-curing process (e.g., exposure) but not a permanent curing process.

[0095] Step S200: Cover the first lens barrel 102 on the first lens 101 to form an aperture. The first lens barrel 102 is moved above the first lens 101, and then gradually brought closer to the first lens 101 and into contact with the added first adhesive 300, so that the first adhesive 300 fills the gap between the outer side and top surface of the first lens 101 and the first lens barrel 102. Figure 11 A schematic diagram is shown of moving the first lens barrel 102 above the first lens 101 and then gradually bringing the first lens barrel 102 closer to the first lens 101 . Figure 12 The diagram shows the first lens barrel 102 contacting the added first adhesive 300. The first lens barrel 102 then continues to approach the first lens 101, squeezing the added liquid first adhesive 300 so that the first adhesive 300 fills the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102. Figure 13 The schematic diagram shows that the first adhesive 300 fills the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102 .

[0096] Furthermore, in one embodiment, the amount of the first adhesive 300 added can be controlled to match the designed gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102, so that the first adhesive 300 fills the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102.

[0097] Step S300: After step S200 is completed, the assembly of the first adhesive 300, the first lens 101, the first lens barrel 102 and the second lens component 200 is baked to permanently solidify the first adhesive 300, thereby obtaining a finished optical lens having the first lens barrel 102. Figure 14 As shown, in one embodiment of the present invention, all the first adhesive materials 300 are permanently cured and melted into one body.

[0098] In this embodiment, since the gaps between the outer side surface 1014 and top surface 1015 of the first lens 101 and the first lens barrel 102 are completely filled with adhesive, the first lens 101 will not be deformed or shifted due to gas expansion during the baking process. It should be noted that in actual mass production, it is difficult to perfectly match the amount of adhesive added with the designed gap in the production of each product. Therefore, a small air gap may exist between the first adhesive 300 and the first lens barrel 102. However, this air gap is usually very small, and the first adhesive 300 located between it and the first lens 101 can act as a buffer. Therefore, this air gap left due to the imperfect match between the amount of adhesive added and the designed gap does not affect the imaging quality, and the method of this embodiment can still achieve a good yield.

[0099] Furthermore, according to another embodiment of the present invention, another method for manufacturing an optical lens having a first lens barrel 102 is provided. As previously described, the addition of the first lens barrel 102 can make the appearance of the optical lens more regular and aesthetically pleasing, while also protecting the first lens element 101 and reducing the impact of external impacts on the optical system. The first lens barrel 102 can also serve as an aperture, thereby reducing the impact of external stray light on imaging quality. In this embodiment, the method for manufacturing the optical lens includes:

[0100] Step S1000: Based on steps S10 to S40, a semi-finished optical lens product based on active calibration is manufactured. In step S40, only steps S401 to S403 may be performed, or all steps S401 to S404 may be performed. Figure 16 The figure shows the semi-finished product state after completing step S402 in one embodiment of the present invention. Figure 17 An embodiment of the present invention shows Figure 16 The schematic diagram shows that the semi-finished product is exposed to light to pre-cure the first adhesive 300 . Figure 17 In FIG. 1 , the arrows indicate the light used to expose the first adhesive material 300 .

[0101] In step S2000, a liquid second adhesive material 500 is placed on the top surface 2021 of the structural area of ​​the second lens assembly 200. The second adhesive material 500 surrounds the periphery of the first adhesive material 300. The second adhesive material 500 may be in contact with the pre-cured first adhesive material 300 or separated from the pre-cured first adhesive material 300. In this embodiment, the second adhesive material 500 is in contact with the pre-cured first adhesive material 300. Preferably, the second adhesive material 500 is made of the same material as the first adhesive material 300 to prevent cross-contamination and chemical reactions that may cause adhesive material variation.

[0102] Furthermore, Figure 19AFIG. 2 shows a schematic top view of an exemplary top surface of the second lens barrel 202. Figure 19A The top surface of the second lens barrel 202 has an air escape groove 600. For the sake of simplicity and clarity, Figure 19A The direction and location of the gas escape groove 600 are only schematically shown. The direction of the gas escape groove 600 can be a groove along the radial direction of the second lens barrel 202. Figure 19B Shown Figure 19A A partial enlarged schematic diagram of the AA' section in FIG. Figure 19B The gas escape groove 600 includes a venting sub-groove 601 and two glue blocking sub-grooves 602 located on both sides of the venting sub-groove 601. Figure 20A Schematic diagram of applying glue on the top surface of the second lens barrel 202 is shown. It can be seen that the second glue material 500 forms a ring with a gap on the top surface of the second lens barrel 202, and the gap is located at the position of the air escape groove 600. Figure 20B Shown Figure 20A The glue blocking groove 602 accommodates the overflowed second adhesive material 500 so that the venting groove 601 is not blocked by the second adhesive material 500, thereby ensuring that there is a gap in the second adhesive material 500.

[0103] Step S3000: After the second adhesive 500 is finished, the first lens barrel 102 is placed on the first lens 101 to form an aperture. The first lens barrel 102 is moved above the first lens 101, and then gradually brought closer to the first lens 101 so that the bottom surface 1021 of the first lens barrel 102 contacts the second adhesive 500. Figure 21 A schematic diagram is shown of moving the first lens barrel 102 above the first lens 101 and then gradually bringing the first lens barrel 102 closer to the first lens 101 . Figure 22 The diagram shows the bottom surface of the first lens barrel 102 contacting the added second adhesive 500. The first lens barrel 102 then moves closer to the first lens 101, ensuring that the bottom surface 1021 of the first lens barrel 102 is in full contact with the liquid second adhesive 500. The second adhesive 500 is then pre-cured by exposure to light, securing the first lens barrel 102 to the top surface 2021 of the second lens barrel 202. Figure 23 FIG. 1 is a schematic diagram showing exposure of the second adhesive material 500 . The arrows in the figure indicate the light used to expose the second adhesive material 500 . Figure 24 It shows the semi-finished product state after pre-curing is completed.

[0104] Step S4000, the assembly of the first adhesive material 300, the second adhesive material 500, the first lens 101, the first lens barrel 102 and the second lens component 200 (i.e. the finished product after step S3000) is baked so that the first adhesive material 300 and the second adhesive material 500 are permanently cured. Figure 25A As shown. In this step, because the design of the aforementioned escape groove 600 can ensure that there is a gap in the second adhesive material 500, during the baking process, the cavity 1022 can be connected to the outside world through the venting sub-groove 601 and the gap in the second adhesive material 500, preventing the air in the cavity 1022 from expanding and causing the first lens 101 to be misaligned or deformed, thereby ensuring the imaging quality of the optical lens based on active calibration. In particular, the design of the aforementioned escape groove 600 can reduce glue painting errors caused by careless operation (such as accidentally forming the second adhesive material 500 into a completely closed ring), which helps to improve the yield in mass production.

[0105] On the basis of the above embodiments, further, a camera module assembly method is provided, which assembles an optical lens using the optical lens assembly method described in the above embodiments; and assembles a camera module based on the optical lens.

[0106] In this article, active calibration is to calibrate the relative positions of the first lens component 100 and the second lens component 200 based on the actual resolution curve measured by actual imaging of the optical system (i.e., the imageable optical system composed of four second lenses 201 and one first lens 101) to improve the imaging quality of the optical lens.

[0107] The active calibration described in this application can adjust the relative positions of the first lens assembly 100 and the second lens assembly 200 in multiple degrees of freedom. Figure 32A The figure shows a relative position adjustment method for active calibration in one embodiment of the present invention. In this adjustment method, the first lens assembly 100 (which can also be the first lens 101) can move relative to the second lens assembly 200 along the x, y, and z directions (i.e., the relative position adjustment in this embodiment has three degrees of freedom). The z direction is along the optical axis, and the x and y directions are perpendicular to the optical axis. Both the x and y directions lie within an adjustment plane P, and translation within this adjustment plane P can be decomposed into two components in the x and y directions.

[0108] Figure 32B FIG. 2 shows the rotation adjustment in active calibration of another embodiment of the present invention. In this embodiment, the relative position adjustment has Figure 32A In addition to the three degrees of freedom, a rotational degree of freedom, i.e., adjustment in the r direction, is added. In this embodiment, the adjustment in the r direction is a rotation within the adjustment plane P, i.e., a rotation around an axis perpendicular to the adjustment plane P.

[0109] Furthermore, Figure 32C The figure shows a relative position adjustment method that adds v and w direction adjustments to the active calibration of another embodiment of the present invention. The v direction represents the rotation angle of the xoz plane, and the w direction represents the rotation angle of the yoz plane. The v and w rotation angles can be combined to form a vector angle, which represents the overall tilt state. In other words, by adjusting the v and w directions, the tilt of the first lens assembly 100 relative to the second lens assembly 200 (i.e., the tilt of the optical axis of the first lens assembly 100 relative to the optical axis of the second lens assembly 200) can be adjusted.

[0110] Adjustment of the aforementioned six degrees of freedom (x, y, z, r, v, and w) may affect the imaging quality of the optical system (e.g., the resolution). In other embodiments of the present invention, the relative position adjustment method may be to adjust only any one of the aforementioned six degrees of freedom, or a combination of any two or more thereof.

[0111] Furthermore, in one embodiment, in the active calibration step, the movement further includes translation on the adjustment plane, ie, movement in the x and y directions.

[0112] Furthermore, in one embodiment, the active calibration further includes adjusting and determining the angle between the axis of the first lens element 101 and the axis of the second lens assembly 200 based on the measured resolving power of the optical system, i.e., adjusting in the w and v directions. In the assembled optical lens or camera module, the angle between the axis of the first lens element 101 and the axis of the second lens assembly 200 may be non-zero.

[0113] Furthermore, in one embodiment, the active calibration also includes: moving the first lens 101 in a direction perpendicular to the adjustment plane (i.e., adjustment in the z direction), and determining the relative position between the first lens 101 and the second lens component 200 in the direction perpendicular to the adjustment plane based on the measured resolution of the optical system.

[0114] Furthermore, in one embodiment, in the pre-positioning step (step 20), a gap is provided between the bottom surface of the first lens 101 and the top surface of the second lens component 200; and in the bonding step (step 40), the adhesive is arranged in the gap.

[0115] In one embodiment, the first lens 101 can be formed from a plurality of sub-lenses that are interlocked and integrated. In this embodiment, a light-shielding layer can be formed on the side and top surfaces of the first lens 101 that are not used for imaging and are not optical surfaces. This light-shielding layer can be formed by screen-printing a light-shielding material on the side and top surfaces of the first lens 101.

[0116] In one embodiment, during the active calibration step, the second lens assembly 200 may be fixed, the first lens 101 may be clamped by a fixture, and the first lens 101 may be moved under the drive of a six-axis motion mechanism connected to the fixture, thereby achieving relative movement in the six degrees of freedom between the first lens 101 and the second lens assembly 200. The fixture may bear against or partially bear against the side of the first lens 101, thereby clamping the first lens 101.

[0117] It should be noted that in the above embodiment, the number of lenses in the first lens assembly 100 and the second lens assembly 200 can be adjusted as needed. For example, the number of lenses in the second lens assembly 200 can be one, two, three, or five, etc. Accordingly, the total number of lenses in the entire optical lens can also be adjusted as needed. For example, the total number of lenses in the optical lens can be six, three, four, or seven, etc.

[0118] It is worth noting that in the embodiments described above, it is necessary to apply glue twice so that the first glue material wraps part or all of the sides of the first lens. This is because during the active calibration process, the first lens needs to be captured by a capture mechanism, and the capture mechanism can be a clamp. Since it is necessary to avoid the optical path of active calibration, the clamp is preferably arranged on the side of the first lens, and the first lens is clamped from both sides by contacting the side of the first lens. Therefore, glue is first applied to the gap between the bottom surface of the first lens and the top surface of the second lens barrel (or the second lens component). After the glue material is pre-cured, the clamp is released, and then glue is applied twice to the side and top surface of the first lens (i.e., liquid first glue is added around and / or on the top surface of the first structural area) and cured, thereby achieving the first glue wrapping part or all of the sides of the first lens.

[0119] Furthermore, Figure 26A schematic diagram of drawing a first adhesive on the top surface of the structural area of ​​the second lens component in another embodiment of the present invention is shown. In this embodiment, the contact point 1019 (also referred to as the contact surface) between the clamp 900 and the side surface 1014 of the first lens is set at a position close to the top surface 1015 of the first lens. The first adhesive is drawn on the top surface of the second lens component, and the top surface of the first adhesive is controlled to be below a certain height so that during the active calibration process (or the process in which the clamp places the first lens to the position determined by the active calibration), the clamp 900 never contacts the first adhesive 300 (for example, during the active calibration process, the clamp is always higher than the top surface of the first adhesive). In this way, the first adhesive can wrap part of the side surface of the first lens (for example, wrap the area below the contact point between the clamp and the first lens) without interfering with the clamp. At the same time, one glue drawing operation can be reduced, which helps to improve production efficiency.

[0120] According to another embodiment of the present invention, another optical lens assembly method is provided. In this embodiment, the first adhesive material can wrap the side of the first lens in one step by drawing and cutting the adhesive. Figure 27 It shows that the first adhesive material in one embodiment of the present invention adopts the adhesive drawing method of drawing and cutting adhesive. Figure 28 Shown with Figure 27 Specifically, when applying the first adhesive material on the top surface of the second lens component (refer to Figure 27 , as shown in the figure, a first adhesive material 300 is drawn on the top surface of the second lens barrel 202. The first adhesive material 300 is not completely enclosed, that is, the first adhesive material can be annular with a notch 309, which is adapted to the clamping jaws 900 to form a gap that allows the clamping jaws 900 to pass through. In this way, during the active calibration process (or the process in which the clamping jaws place the first lens to the position determined by the active calibration), the top surface of the first adhesive material can be higher than the contact point between the clamping jaws and the side of the first lens. When the bottom surface of the first lens contacts the top surface of the first adhesive material, the clamping jaws drive the first lens to continue moving downward, so that the top surface of the first adhesive material is higher than the top surface of the first lens (referring to the top surface of the first structural area), and the first adhesive material located above the top surface of the first structural area flows to the top surface of the first structural area, so that the first adhesive material covers the top surface of the first structural area and wraps the side of the first structural area. Since the above process can be completed by drawing glue once, it helps to improve production efficiency. On the other hand, the design of leaving a notch in the first adhesive material can also provide an escape hole for the subsequent baking step (the step of achieving permanent curing by baking), so as to avoid product defects caused by gas expansion during the baking process.

[0121] In particular, in one embodiment, the top surface of the first structural zone of the first lens can be made into an inclined surface with a higher outer side and a lower inner side, wherein the outer side is the side close to the outer side of the first lens, and the inner side is the side close to the first optical zone of the first lens. Figure 31 A schematic diagram showing an embodiment of the present invention in which the top surface of the first structural area is configured as an inclined surface. In this scheme, when the top surface of the first adhesive is higher than the top surface of the first structural area, the first adhesive located above the top surface of the first structural area will flow along the inclined surface 1016 at the top of the first structural area and cover the top surface of the first structural area. Furthermore, an annular boss 1017 (or adhesive dam) can be provided on the top surface of the first structural area to prevent the first adhesive from contaminating the first optical area. The annular boss 1017 can be provided at a position close to the first optical area.

[0122] Furthermore, it should be noted that the relative position of the first lens element and the second lens element determined after active calibration may be such that the optical axis of the first lens element and the optical axis of the second lens element have a non-zero angle. If this angle is too large, then when the first lens barrel is further installed, the first lens barrel may interfere with the first lens element, resulting in product defects. Figure 29 An example of interference between the first lens barrel and the first lens is shown. In one embodiment, after the active calibration step, angle A between the optical axis of the first lens and the optical axis of the second lens assembly is determined based on the recorded active calibration data. During the step of placing the first lens barrel over the first lens, angle B between the central axis of the first lens barrel and the optical axis of the second lens assembly is determined based on the determined angle A between the optical axis of the first lens and the optical axis of the second lens assembly (e.g., such that the difference between angle B and angle A is less than a preset threshold), thereby preventing the first lens barrel from interfering with (or colliding with) the first lens and causing product defects. Figure 30 An example of avoiding interference between the first lens barrel and the first lens by making the difference between the included angle B and the included angle A smaller than a preset threshold is shown.

[0123] Furthermore, according to one embodiment of the present invention, a camera module assembly method is also provided, comprising: assembling an optical lens using the optical lens assembly method of any of the aforementioned embodiments, and then using the assembled optical lens to manufacture a camera module.

[0124] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that: include: A first lens component includes a first lens having a first optical zone for optical imaging and a first structural zone outside the first optical zone; a second lens assembly comprising a second lens barrel and at least one second lens mounted on the second lens barrel; The second lens has a second optical zone for optical imaging and a second structural zone outside the second optical zone. The second structural zone and the second lens barrel constitute a structural zone of the second lens component. A first gap is defined between a top surface of the structural zone of the second lens component and a bottom surface of the first structural zone. The second lens and the first lens together constitute an optical system capable of imaging. as well as a first adhesive material located in the first gap to bond the first lens element and the second lens component; wherein the first adhesive material extends outwardly along the top surface of the structural area of ​​the second lens component and surrounds the first structural area, and the outwardly extending first adhesive material wraps at least a portion of the outer side surface of the first structural area; the first adhesive material is arranged in a ring shape with four notches, and the multiple segments of the first adhesive material separated by the notches are arranged in an axially symmetrical state; The first adhesive material is used to support the first lens and the second lens component, and to fix the first lens and the second lens component by permanent curing thereof, so that the relative position of the first lens and the second lens component is maintained at the relative position determined by active calibration.

2. The optical lens according to claim 1, wherein: The first adhesive material also covers the top surface of the first structural area.

3. The optical lens according to claim 1, wherein: The first lens component further includes a first lens barrel, which surrounds the first lens and blocks light from the outside that is directed toward the outer side surface and the top surface of the first structural area.

4. The optical lens according to claim 1, wherein: During the active calibration process, the first lens is clamped by a clamp from its side, and the notch of the first adhesive material is adapted to the clamp to form a gap for the clamp to pass through.

5. A camera module, characterized in that: include: The optical lens according to any one of claims 1 to 4; as well as Photosensitive component.

Images