Optical lens, camera module and assembly method thereof

Abstract

The present invention provides an optical lens, comprising: a first lens component; a second lens component, wherein a first gap is provided between the top surface of the structural area of ​​the second lens component and the bottom surface of the first structural area; and a first adhesive material, which is located in the first gap and extends outward along the top surface of the structural area of ​​the second lens component and surrounds the first structural area, and the first adhesive material extending outward wraps at least a portion of the outer side surface of the first structural area. The present invention also provides a corresponding camera module and an optical lens and camera module assembly method. By wrapping the side surface of the first lens with the first adhesive material, the resolution of the actual product of the optical lens or camera module based on active calibration can be made closer to the resolution obtained by active calibration.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to an optical lens, a camera module and an assembly method thereof. Background Art

[0002] 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 been rapidly developed and improved, and in recent years, camera modules have been widely used in many fields such as medical treatment, security, industrial production, etc.

[0003] In order to meet the increasingly broad market demand, high pixel, small size and large aperture are the irreversible development trend of existing camera modules. However, it is very difficult to achieve the three requirements of high pixel, small size and large aperture in the same camera module. For example, the compact development of mobile phones and the increase in the screen-to-body ratio of mobile phones have made the space inside the mobile phone for the front camera module smaller and smaller, while the market has put forward higher and higher requirements on the imaging quality of camera modules.

[0004] In the field of compact camera modules (such as camera modules for mobile phones), it is often necessary to consider the quality of optical imaging lenses and manufacturing errors in the module packaging process. Specifically, in the manufacturing process of optical imaging lenses, the factors affecting the lens resolution come from the errors of each component and its assembly, the error of the thickness of the lens spacing element, the error of the assembly and matching of each lens, and the change of the refractive index of the lens material. Among them, the errors of each component and its assembly include the optical surface thickness of each lens monomer, the lens optical surface sag, the optical surface surface shape, the radius of curvature, the single-sided and inter-face eccentricity of the lens, the tilt of the optical surface of the lens, etc. The size of these errors depends on the mold accuracy and molding accuracy control capabilities. The error of the thickness of the lens spacing element depends on the processing accuracy of the component. The error of the assembly and matching of each lens depends on the dimensional tolerance of the assembled component and the assembly accuracy of the lens. The error introduced by the change of the refractive index of the lens material depends on the stability of the material and the batch consistency. There is a phenomenon of cumulative deterioration in the errors of the above-mentioned components affecting the resolution, and this cumulative error will continue to increase with the increase in the number of lenses. The existing resolution solution is to control the tolerance of the size of each relatively sensitive component and compensate for the lens rotation to improve the resolution. However, since high-pixel and large-aperture lenses are more sensitive, strict tolerances are required. For example, 1um lens eccentricity of some sensitive lenses will cause 9' image plane tilt, which makes lens processing and assembly more and more difficult. At the same time, due to the long feedback cycle during the assembly process, the process capability index (CPK) of lens assembly is low and fluctuates greatly, resulting in a high defect rate. And as mentioned above, because there are many factors that affect the resolution of the lens, which exist in multiple components, the control of each factor has the limit of manufacturing precision. If the precision of each component is simply improved, the improvement capacity is limited, the improvement cost is high, and it cannot meet the market's increasing demand for imaging quality.

[0005] 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 each component of the material (such as the sub-lens or photosensitive components used to assemble the optical lens or camera module) and its assembly accuracy, thereby reducing the overall cost of the optical imaging lens and the camera module; it can adjust the various aberrations of the camera module in real time during the assembly process, reduce the defect rate, reduce production costs, and improve imaging quality.

[0006] 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, and sometimes it is necessary to face the yield reduction caused by various unpredictable factors. For example, in one process scheme, a 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, the actual trial production found that the imaging quality of the optical lens and the camera module is often degraded compared to the imaging quality obtained in the active calibration stage, and 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, the variation of the 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 the product yield. Summary of the invention

[0007] The present invention aims to provide a solution that overcomes at least one of the drawbacks of the prior art.

[0008] According to one aspect of the present invention, an optical lens is provided, comprising a first lens component, which includes a first lens, the first lens having a first optical zone for optical imaging and a first structural zone outside the first optical zone; a second lens component, which includes a second lens barrel and at least one second lens installed in the second lens barrel, the at least one second lens and the first lens together constitute an imageable optical system, the second lens 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 constitute the structural zone of the second lens component, and a first gap is provided between the top surface of the structural zone of the second lens component and the bottom surface of the first structural zone; and a first adhesive material, which is located in the first gap and extends outwardly along the top surface of the structural zone of the second lens component and surrounds the first structural zone, and the first adhesive material extending outwardly wraps at least a portion of the outer side surface of the first structural zone.

[0009] In one embodiment, 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.

[0010] In one embodiment, the first adhesive material wraps the entire outer side of the first structural area.

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

[0012] In one embodiment, the first adhesive material is black to cover the outer side surface and the top surface of the first structure area.

[0013] In one embodiment, the first lens component further includes a first lens barrel, which surrounds the first lens and blocks the light emitted from the outside to the outer side surface and the top surface of the first structural area.

[0014] In one embodiment, the first adhesive fills the gap between the outer side surface and the top surface of the first lens and the first lens barrel.

[0015] In one embodiment, a second adhesive material is provided between the bottom surface of the first lens barrel and the top surface of the second lens barrel, and the first lens barrel is bonded to the second lens barrel through the second adhesive material.

[0016] In one embodiment, a cavity is defined between the outer side surface and the top surface of the first lens and the first lens barrel.

[0017] In one embodiment, the first lens component and / or the second lens component has an escape channel connecting the cavity with the outside.

[0018] In one embodiment, the gas escape channel includes a gas escape groove located on the top surface of the second lens barrel and / or located on the bottom surface of the first lens barrel.

[0019] In one embodiment, in a top view, the second adhesive material forms a ring shape with a notch on the top surface of the second lens barrel, and the notch is located at the position of the air escape groove.

[0020] In one embodiment, the venting groove includes a venting sub-groove and two glue-stopping sub-grooves respectively located on both sides of the venting sub-groove, and the glue-stopping sub-grooves accommodate overflowed second glue material so that the venting sub-groove is not blocked by the second glue material.

[0021] In one embodiment, a glue overflow groove is formed at one end of the top surface of the first structural zone close to the first optical zone.

[0022] In one embodiment, the top surface of the first structural zone is inclined, and an end of the top surface of the first structural zone close to the first optical zone is higher than an end of the top surface of the first structural zone close to the outer side surface of the first structural zone.

[0023] In one embodiment, the top surface of the second lens barrel is a flat surface, the first gap is located between the flat surface and the bottom surface of the first structural area, the first adhesive material is located in the first gap and extends outward along the flat surface and surrounds the first structural area, and the first adhesive material extending outward wraps at least a portion of the outer side surface of the first structural area.

[0024] According to another aspect of the present invention, a camera module is provided, which includes the optical lens described in any one of the above embodiments.

[0025] According to another aspect of the present invention, there is also provided an optical lens assembly method, comprising: preparing a first lens component and a second lens component to be separated from each other, wherein the first lens component comprises a first lens, the first lens having a first optical zone for optical imaging and a first structural zone outside the first optical zone, the second lens component comprises a second lens barrel and at least one second lens installed in the second lens barrel, the second lens having a second optical zone for optical imaging and a second structural zone outside the second optical zone, and the second structural zone and the second lens barrel constitute the structural zone of the second lens component; pre-positioning the first lens component and the second lens component so that the first lens and the at least one second lens together constitute an imageable optical system; adjusting and determining the relative position of the first lens component and the second lens component based on active calibration; and bonding the first lens and the second lens component by a first adhesive, wherein a first gap is provided between the top surface of the structural zone of the second lens component and the bottom surface of the first structural zone, the first adhesive is located in the first gap and extends outwardly along the top surface of the structural zone of the second lens component and surrounds the first structural zone, and the first adhesive extending outwardly wraps at least a portion of the outer side surface of the first structural zone, and after the first adhesive is cured, the first lens and the second lens component are fixed and maintained at the relative position determined by the active calibration.

[0026] In one embodiment, the step of bonding by the first adhesive includes: arranging a liquid first adhesive on the top surface of the structural area of ​​the second lens component; moving the first lens to the top of the second lens component, then gradually approaching the second lens component and contacting the first adhesive, and adjusting the relative position of the first lens and the second lens component to the relative position determined by active calibration, wherein the arranged liquid first adhesive is at least located in the first gap; pre-curing the first adhesive; and permanently curing the first adhesive.

[0027] In one embodiment, in the pre-curing step, during the pre-curing process, the first lens and the second lens component are maintained at a relative position determined by active calibration by relying on an external pickup mechanism and / or a fixed platform, and after pre-curing, the first lens and the second lens component are maintained at a relative position determined by active calibration by relying on the pre-cured first adhesive.

[0028] In one embodiment, the pre-curing step includes exposing the first adhesive material to light.

[0029] In one embodiment, the assembly method further includes: between the pre-curing step and the permanent curing step, adding a paste-like first adhesive around and on the top surface of the first structural area, so that the first adhesive wraps all outer side surfaces of the first structural area and covers the top surface of the first structural area.

[0030] In one embodiment, the permanent curing step includes: baking the pre-cured assembly of the first adhesive material, the first lens, and the second lens component, so that the first adhesive material is permanently cured.

[0031] In one embodiment, the assembly method further includes: after the permanent curing step, adding a liquid first adhesive around and on the top surface of the first structural area so that the first adhesive wraps all outer side surfaces of the first structural area and covers the top surface of the first structural area; and curing the added first adhesive.

[0032] In one embodiment, the first adhesive material is black, and in the step of adding the liquid first adhesive material, the first adhesive material located on the top surface of the first structural area forms a stop.

[0033] In one embodiment, the assembly method further includes: after the step of adding the liquid first adhesive, covering the first lens barrel on the first lens to form an aperture, wherein the first lens barrel is moved above the first lens, and then the first lens barrel is gradually approached to the first lens and contacts the added first adhesive, so that the first adhesive fills the gap between the outer side surface and the top surface of the first lens and the first lens barrel.

[0034] In one embodiment, the amount of the first adhesive added is controlled to match the designed gap between the outer side and top surface of the first lens and the first lens barrel, so that the first adhesive fills the gap between the outer side and top surface of the first lens and the first lens barrel.

[0035] In one embodiment, in the preparation step, an end of the top surface of the first structural area close to the first optical area has an overflow groove; and in the step of covering the first lens barrel on the first lens, the overflow groove accommodates overflowed first glue material.

[0036] In one embodiment, the permanent curing step includes: baking the pre-cured assembly of the first adhesive material, the first lens, the first lens barrel and the second lens component, so that the first adhesive material is permanently cured.

[0037] In one embodiment, the assembly method further includes: after the pre-curing step, arranging a liquid second adhesive on the top surface of the structural area of ​​the second lens component, the second adhesive surrounding the periphery of the first adhesive; and covering the first lens barrel on the first lens to form an aperture stop, wherein the first lens barrel is moved above the first lens, and then the first lens barrel is gradually approached to the first lens and the bottom surface of the first lens barrel contacts the second adhesive.

[0038] In one embodiment, the permanent curing step includes: baking the pre-cured assembly of the first adhesive material, the second adhesive material, the first lens, the first lens barrel and the second lens component, so that the first adhesive material and the second adhesive material are permanently cured.

[0039] In one embodiment, in the preparation step, the top surface of the second lens barrel and / or the bottom surface of the first lens barrel has an air escape groove.

[0040] In one embodiment, in the step of arranging the second liquid adhesive material, the second adhesive material forms a ring shape with a gap on the top surface of the second lens barrel in a top view.

[0041] In one embodiment, in the preparation step, the top surface of the second lens barrel has an air escape groove; and in the step of arranging the second liquid adhesive, the notch is located at the position of the air escape groove.

[0042] In one embodiment, in the preparation step, the air escape groove includes a venting sub-groove and two glue-stopping sub-grooves respectively located on both sides of the venting sub-groove; and in the step of arranging the liquid second glue material, the glue-stopping sub-groove accommodates overflowed second glue material so that the venting sub-groove is not blocked by the second glue material.

[0043] In one embodiment, in the step of arranging a liquid first adhesive on the top surface of the structural area of ​​the second lens component, the first adhesive forms a ring shape with a gap, and the gap is suitable for avoiding a capturing mechanism that captures the first lens from the side.

[0044] In one embodiment, in the step of arranging a liquid first glue material on the top surface of the structural area of ​​the second lens component, the pickup mechanism is a clamp.

[0045] In one embodiment, in the preparation step, the top surface of the first structural area is an inclined surface with a higher outer side and a lower inner side.

[0046] In one embodiment, in the preparation step, an annular boss is provided on the top surface of the first structural area.

[0047] In one embodiment, in the step of covering the first lens barrel on the first lens, the angle A between the optical axis of the first lens and the optical axis of the second lens component is determined so that the difference between the angle B and the angle A is less than a preset threshold.

[0048] According to another aspect of the present invention, a camera module assembly method is also provided, comprising: assembling an optical lens using the optical lens assembly method described in any one of the preceding embodiments; and assembling a camera module based on the optical lens.

[0049] Compared with the prior art, the present invention has at least one of the following technical effects:

[0050] 1. The present invention can make 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 by wrapping the side of the first lens with the first adhesive material (adhesive material for bonding the first and second lens components).

[0051] 2. In some embodiments of the present invention, a first lens barrel may be added to the first lens to form an aperture, and the appearance of the optical lens barrel may be more regular and beautiful.

[0052] 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.

[0053] 4. In some embodiments of the present invention, the gap between the outer side surface and the top surface of the first lens and the first lens barrel can be completely filled with adhesive, so that the first lens will not be deformed or shifted due to gas expansion during the baking process.

[0054] 5. In some embodiments of the present invention, an air escape hole design can be used to avoid deformation or displacement of the first lens due to gas expansion during baking.

[0055] 6. In some embodiments of the present invention, the gas escape groove can reduce glue painting errors caused by careless operation (such as accidentally forming the second glue material into a completely closed ring), which helps to improve the yield in mass production.

[0056] 7. In some embodiments of the present invention, the first adhesive material can wrap the side surface of the first lens and / or cover the top surface of the structure area of ​​the first lens by only one coating, thereby reducing the process steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Exemplary embodiments are shown in the referenced drawings. The embodiments and drawings disclosed herein are to be considered illustrative rather than restrictive.

[0058] Figure 1 A cross-sectional schematic diagram of an optical lens according to an embodiment of the present invention is shown;

[0059] 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;

[0060] 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;

[0061] Figure 4 A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0062] 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;

[0063] 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;

[0064] Figure 7 A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0065] 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;

[0066] Fig. 9 Shows the Figure 8 The schematic diagram of the semi-finished product being baked so that all the first adhesive materials 300 are permanently solidified and integrated;

[0067] Fig.10 A schematic diagram showing an embodiment of the present invention after glue is applied on the periphery of the first glue material 300 and the top surface 1015 of the first structure area 1012 of the first lens 101;

[0068] Fig.11 A schematic diagram showing 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 is shown;

[0069] Fig.12 A schematic diagram showing the first lens barrel 102 contacting the added first adhesive material 300 is shown;

[0070] Fig.13 A schematic diagram showing the first adhesive material 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;

[0071] Fig.14 A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0072] Fig.15A A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0073] Fig. 15B An improved first lens 101 is shown;

[0074] Fig.16 The semi-finished product state after completing step S402 in one embodiment of the present invention is shown;

[0075] Fig.17 An embodiment of the present invention is shown. Fig.16 A schematic diagram showing that the semi-finished product is exposed to light to pre-cure the first adhesive material 300;

[0076] Fig.18 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 is shown;

[0077] Fig.19A A schematic top view of the top surface of an exemplary second lens barrel 202 is shown;

[0078] Fig.19B Shows Fig.19A A partial enlarged schematic diagram of the AA' section in FIG.

[0079] Fig. 20A A schematic diagram showing the application of glue on the top surface of the second lens barrel 202 in one embodiment of the present invention is shown;

[0080] Fig. 20B Shows Fig. 20A A partial enlarged schematic diagram of the AA' section in FIG.

[0081] Fig.21 A schematic diagram showing a process 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 in one embodiment of the present invention;

[0082] Fig. 22A schematic diagram showing the bottom surface of the first lens barrel 102 in contact with the added second adhesive material 500 in one embodiment of the present invention is shown;

[0083] Fig.23 FIG. 1 is a schematic diagram showing exposure of the second adhesive material 500 in one embodiment of the present invention;

[0084] Fig.24 The semi-finished product state after pre-curing is completed in one embodiment of the present invention is shown;

[0085] Fig.25A A cross-sectional schematic diagram of an optical lens according to another embodiment of the present invention is shown;

[0086] Fig.25B A first lens 101 in another embodiment of the present invention is shown;

[0087] Fig.26 A schematic diagram showing a first adhesive material being painted on the top surface of the structure area of ​​the second lens component in another embodiment of the present invention is shown;

[0088] Fig. 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;

[0089] Fig.28 Shown with Fig. 27 The arrangement of the jaws corresponding to the glue painting method shown;

[0090] Fig.29 An example of interference between the first lens barrel and the first lens is shown;

[0091] Fig.30 An example of avoiding interference between the first lens barrel and the first lens by making the difference between the angle B and the angle A smaller than a preset threshold is shown;

[0092] Fig.31 A schematic diagram showing a top surface of the first structural area in an embodiment of the present invention is configured as an inclined surface;

[0093] Fig.32A The relative position adjustment method in active calibration in one embodiment of the present invention is shown;

[0094] Fig.32B shows the rotation adjustment in active calibration of another embodiment of the present invention;

[0095] Fig.32C A relative position adjustment method with added v and w direction adjustments in active calibration of yet another embodiment of the present invention is shown. DETAILED DESCRIPTION

[0096] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only 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.

[0097] 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 feature. Therefore, without departing from the teaching of this application, the first subject discussed below can also be referred to as the second subject.

[0098] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0099] 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, wholes, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, wholes, 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.

[0100] 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 of ordinary skill in the art.

[0101] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0102] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present 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.

[0103] Figure 1A schematic cross-sectional view of an optical lens of an embodiment of the present invention is shown. The cross-section is a cross-section passing 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. The first lens component 100 includes a first lens 101, and the first lens 101 has 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 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 component 200, and a first gap 400 is provided between the top surface 2021 of the structural zone of the second lens component 200 and the bottom surface 1013 of the first structural zone 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 and surrounds the first structural area 1012, and the first adhesive material 300 extending outward wraps at least a portion of the outer side surface 1014 of the first structural area 1012 (in this embodiment, the first adhesive material 300 does not wrap the entire outer side 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 the active calibration.

[0104] 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 material 300 wraps the entire outer side surface 1014 of the first structural area 1012. Further, Figure 7 FIG. 2 is 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 material 300 wraps all the outer side surfaces 1014 of the first structural area 1012 and also covers the top surface 1015 of the first structural area 1012. 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 may be, for example, the change of the optical system of the actual product (such as an optical lens or a camera module) relative to the optical system determined by the active calibration (step 30) during the curing process of the first adhesive material 300 or after long-term use. This change will lead to the degradation of the imaging quality of the product. The applicant further found that, relative to the scheme in which the first adhesive material 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 material 300 wraps the side of the first lens 101, the resolution of the actual product is closer to the resolution obtained by active calibration, so the design of the first adhesive material 300 wrapping the side of the first lens 101 helps to improve the product yield.

[0105] 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 is a cross-sectional view passing through the optical axis of the optical lens. In this embodiment, the first adhesive material 300 is black and shields the outer side surface 1014 and the top surface 1015 of the first structural area 1012 to form a stop.

[0106] Fig.14 A cross-sectional schematic diagram of an optical lens of another embodiment of the present invention is shown. The cross-section is a cross-section passing through the optical axis of the optical lens. In this embodiment, the first lens component 100 further includes a first lens barrel 102, which surrounds the first lens 101 and blocks the light from the outside to the outer side surface 1014 and the top surface 1015 of the first structural area 1012. Further, 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.

[0107] Fig.15A FIG. 2 is a schematic cross-sectional view 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. Fig.14 The first lens 101 is improved on the basis of the embodiment shown. Fig. 15BAn improved first lens 101 is shown. In this embodiment, the top surface 1015 of the first structure 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 close to the first lens 1011.

[0108] Fig.25A A cross-sectional schematic diagram of an optical lens of another embodiment of the present invention is shown. Wherein, the cross section is a cross section 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 is provided between the bottom surface 1021 of the first lens barrel 102 and the top surface 2021 of the second lens barrel 202, and the first lens barrel 102 is bonded to the second lens barrel 202 by 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 component 200 has an air escape channel that connects the cavity 1022 with the outside. In this embodiment, the air escape channel is formed by arranging an air escape groove 600 on the top surface of the second lens barrel 202. Fig.19A FIG. 2 is a schematic top view of an exemplary second lens barrel 202. Fig.19A The top surface of the second lens barrel 202 has an air escape groove 600. For the sake of simplicity and clarity, Fig.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. Further, Fig.19B Shows Fig.19A A partial enlarged schematic diagram of the AA' section in FIG. Fig.19B The air escape groove 600 includes a venting sub-groove 601 and two glue blocking sub-grooves 602 respectively located on both sides of the venting sub-groove 601. Fig.18 FIG. 2 shows a cross-sectional schematic diagram of painting the second adhesive material 500 on the top surface of the second lens barrel 202. Fig. 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 gas escape groove 600. Fig. 20B Shows Fig. 20AThe partially enlarged schematic diagram of the AA' section in FIG. The glue blocking sub-groove 602 accommodates the overflowed second glue material 500, so that the venting 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 venting sub-groove 601 and the gap of 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.

[0109] It should be noted that in other embodiments, the escape channel may also be provided in the first lens component 100, or may be formed by the first lens component 100 and the second lens component 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.

[0110] Fig.25B FIG. 1 shows a first lens 101 in another embodiment of the present invention. Fig.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 is also possible to use Fig. 15B The first lens 101 shown is replaced Fig.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.

[0111] 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 above 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. Further, the photosensitive component may include, for example, a circuit board, a photosensitive chip installed on the surface of the circuit board, an annular support body formed or installed on the surface of the circuit board and surrounding the photosensitive chip, and a color filter. The annular support body may form a step, and the color filter is installed on the step of the annular support body. The base of the motor is installed on the top surface of the annular support body.

[0112] Furthermore, according to an embodiment of the present invention, there is provided an optical lens assembly method, comprising:

[0113] Step S10, preparation step. Prepare a first lens component 100 and a second lens component 200 separated from each other, wherein the first lens component 100 includes a first lens 101, wherein the first lens 101 has a first optical zone 1011 for optical imaging and a first structural zone 1012 outside the first optical zone 1011, and the second lens component 200 includes a second lens barrel 202 and four second lenses 201 installed in the second lens barrel 202, wherein 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, and the second structural zone 2012 and the second lens barrel 202 constitute the structural zone of the second lens component 200.

[0114] Step S20, pre-positioning step: The second lens component 200 pre-positions the first lens component 100 and the second lens component 200, so that the first lens 101 and the four second lenses 201 together form an optical system capable of forming an image.

[0115] Step S30, active calibration step: adjusting and determining the relative position of the first lens component 100 and the second lens component 200 based on active calibration.

[0116] Step S40, bonding step. The first lens 101 and the second lens component 200 are bonded by the first adhesive material 300, wherein a first gap 400 is provided between the top surface of the structural area of ​​the second lens component 200 and the bottom surface of the first structural area 1012, the first adhesive material 300 is located in the first gap 400 and extends outwardly along the top surface of the structural area of ​​the second lens component 200 and surrounds the first structural area 1012, and the first adhesive material 300 extending outwardly wraps at least a portion of the outer side surface of the first structural area 1012, and after the first adhesive material 300 is cured, the first lens 101 and the second lens component 200 are fixed and maintained at the relative position determined by the active calibration. Figure 1 FIG. 1 is 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 wrap the entire outer side surface 1014 of the first structural region 1012 . Figure 4 FIG. 4 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 FIG. 4 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 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 .

[0117] 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 may be, for example, the change in the optical system of the actual product (such as an optical lens or a 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 degradation of the imaging quality of the product. The applicant further found that, relative to 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, so the design of the first adhesive 300 wrapping the side of the first lens 101 helps to improve the product yield.

[0118] Further, in one embodiment, the bonding step (step S40) includes:

[0119] S401, glue application step: a first glue material 300 in liquid state is arranged on the top surface 2021 of the structure area of ​​the second lens component 200.

[0120] S402, a positioning step based on the active calibration result: the first lens 101 is moved to the top of the second lens component 200, and then gradually approaches the second lens component 200 and contacts the first adhesive material 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 material 300 is at least located in the first gap 400.

[0121] 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 at 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 clamp) captures the first lens 101, and the 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 at 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 of the first adhesive material 300.

[0122] S404, permanent curing step. The first adhesive material 300 is permanently cured to obtain a finished optical lens. In one embodiment, the permanent curing may be baking the pre-cured first adhesive material 300, the first lens 101 and the second lens component 200 so that the first adhesive material 300 is permanently cured.

[0123] 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.

[0124] Furthermore, in one embodiment, in step S402, the arranged liquid first adhesive material 300 may be located only in the first gap 400. Between steps S403 and S404, liquid first adhesive material 300 may be added around the pre-cured first adhesive material 300, so that the first structural area 1012 of the first lens 101 is wrapped by the first adhesive material 300. The wrapping may be as follows: Figure 1 The first structural area 1012 is partially wrapped on the side, which can also be as shown. Figure 4 The first structural area 1012 is fully wrapped on the side, and can also be as follows Figure 5 As shown, the side surface of the first structural area 1012 is 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.

[0125] Further, in one embodiment, Figure 1 Based on the embodiment shown in the figure, an optical lens with a first adhesive material 300 as an aperture 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 all the top surfaces of the first structural area 1012; and after baking, all the first adhesive materials 300 are permanently solidified and integrated, so as to obtain an optical lens with the first adhesive material 300 as an aperture. This solution helps to reduce stray light of the optical lens. Figure 2 and Figure 3 Shown in Figure 1 The process of manufacturing the first adhesive material 300 as an optical lens of the aperture based on the embodiment shown. Figure 2 Shown in Figure 1 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. The first adhesive material 300 may be black. And the added first adhesive material 300 covers the entire top surface 1015 of the first structural area 1012 to form a stop. 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.

[0126] Further, in another embodiment, Figure 4 Based on the embodiment shown in the figure, an optical lens with a first adhesive material 300 as an aperture 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 all the top surfaces of the first structural area 1012; and after baking, all the first adhesive materials 300 are permanently solidified and integrated, so as to obtain an optical lens with the first adhesive material 300 as an aperture. This solution helps to reduce stray light of the optical lens. Figure 5 and Figure 6 Shown in Figure 4 The process of manufacturing the first adhesive material 300 as an optical lens of the aperture based on the embodiment shown. Figure 5 Shown in Figure 4 Schematic diagram of adding a first adhesive material 300 to wrap all outer sides of the first structural area 1012 and cover the top surface of the first structural area 1012. The first adhesive material 300 may be black. And the added first adhesive material 300 covers the entire top surface 1015 of the first structural area 1012 to form a stop. Figure 6 Shows the Figure 5Schematic diagram of baking the intermediate so that all the first adhesive materials 300 are permanently solidified and integrated.

[0127] Further, in yet another embodiment, Figure 7 Based on the embodiment shown in the figure, an optical lens with a first adhesive material 300 as an aperture 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 sides of the first structural area 1012 and cover all the top surfaces 1015 of the first structural area 1012; and after baking, all the first adhesive materials 300 are permanently solidified and integrated, so as to obtain an optical lens with the first adhesive material 300 as an aperture. This solution helps to reduce stray light of the optical lens. Figure 8 and Fig. 9 Shown in Figure 7 The process of manufacturing the first adhesive material 300 as an optical lens of the aperture based on the embodiment shown. Figure 8 Shown in Figure 7 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. The first adhesive material 300 may be black. And the added first adhesive material 300 covers the entire top surface 1015 of the first structural area 1012 to form a stop. Fig. 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.

[0128] In the foregoing, the first adhesive material 300 is used as the basis for making 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.

[0129] Furthermore, according to an 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 beautiful, and can also protect the first lens 101, thereby reducing the impact of external impact on the optical system. The first lens barrel 102 can also serve as a stop, thereby reducing the impact of external stray light on imaging quality. In this embodiment, the method for manufacturing the optical lens includes:

[0130] Step S100 , based on steps S10 - S40 , a semi-finished optical lens based on active calibration is manufactured, and then glue is applied to the periphery of the first glue material 300 and the top surface 1015 of the first structural area 1012 of the first lens 101 , for example, liquid first glue material 300 is added. Fig.10 The schematic diagram of one embodiment of the present invention after glue is applied on the periphery of the first glue material 300 and the top surface 1015 of the first structure area 1012 of the first lens 101. In this step, the semi-finished product made in steps S10-S40 may be subjected to a permanent curing process (e.g., baking) or may be subjected to a pre-curing process (e.g., exposure) but not subjected to a permanent curing process.

[0131] Step S200, covering the first lens barrel 102 on the first lens 101 to form an aperture, wherein the first lens barrel 102 is moved above the first lens 101, and then the first lens barrel 102 is gradually brought close to the first lens 101 and in 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. Fig.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 . Fig.12 The first lens barrel 102 is shown in a schematic diagram of contacting the added first adhesive material 300. Then, the first lens barrel 102 continues to approach the first lens 101 to squeeze the added liquid first adhesive material 300, so that the first adhesive material 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. Fig.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 .

[0132] Furthermore, in one embodiment, the amount of the first adhesive material 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 material 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.

[0133] Step S300: After step S200 is completed, the assembly of the first adhesive material 300, the first lens 101, the first lens barrel 102 and the second lens component 200 is baked so that all the first adhesive materials 300 are permanently cured, thereby obtaining a finished optical lens having the first lens barrel 102. Fig.14 As shown, in one embodiment of the present invention, all the first adhesive materials 300 are permanently cured and melted into one body.

[0134] In this embodiment, since the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first lens barrel 102 has been 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 the actual mass production process, it is difficult to perfectly match the amount of adhesive added with the designed gap in the production of each product. Therefore, there may be a small air gap between the first adhesive 300 and the first lens barrel 102. However, this air gap is usually very small, and the first adhesive 300 is located between it and the first lens 101 to play a buffering role. Therefore, the air gap left due to the imperfect match between the amount of adhesive added and the designed gap will not affect the imaging quality, and the method of this embodiment can still have a good yield.

[0135] Further, according to another embodiment of the present invention, another method for manufacturing an optical lens having a first lens barrel 102 is provided. As described above, adding the first lens barrel 102 can make the appearance of the optical lens more regular and beautiful, and can also protect the first lens 101, thereby reducing the impact of external impact on the optical system. The first lens barrel 102 can also serve as a diaphragm, thereby reducing the impact of external stray light on imaging quality. In this embodiment, the method for manufacturing the optical lens includes:

[0136] Step S1000, based on steps S10-S40, a semi-finished optical lens 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. Fig.16 The figure shows the semi-finished product state after completing step S402 in one embodiment of the present invention. Fig.17 An embodiment of the present invention is shown. Fig.16 The schematic diagram shows that the semi-finished product is exposed to light to pre-cure the first adhesive material 300 . Fig.17 In FIG. 1 , arrows indicate the light used to expose the first adhesive material 300 .

[0137] Step S2000, a liquid second adhesive material 500 is arranged on the top surface 2021 of the structural area of ​​the second lens component 200, and the second adhesive material 500 surrounds the periphery of the first adhesive material 300. The second adhesive material 500 can be in contact with the pre-cured first adhesive material 300, or can be 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 can be made of the same material as the first adhesive material 300 to avoid mutual mixing and chemical reaction resulting in adhesive material variation.

[0138] Further, Fig.19AFIG. 2 is a schematic top view of an exemplary second lens barrel 202. Fig.19A The top surface of the second lens barrel 202 has an air escape groove 600. For the sake of simplicity and clarity, Fig.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. Further, Fig.19B Shows Fig.19A A partial enlarged schematic diagram of the AA' section in FIG. Fig.19B The air escape groove 600 includes a venting sub-groove 601 and two glue blocking sub-grooves 602 respectively located on both sides of the venting sub-groove 601. Fig. 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 gas escape groove 600. Fig. 20B Shows Fig. 20A The glue blocking groove 602 accommodates the overflowed second glue material 500 so that the venting groove 601 is not blocked by the second glue material 500, thereby ensuring that the second glue material 500 has a gap.

[0139] Step S3000, after the second adhesive material 500 is finished, the first lens barrel 102 is covered on the first lens 101 to form an aperture. The first lens barrel 102 is moved above the first lens 101, and then the first lens barrel 102 is gradually brought close to the first lens 101 and the bottom surface 1021 of the first lens barrel 102 contacts the second adhesive material 500. Fig.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 . Fig. 22 The bottom surface of the first lens barrel 102 contacts the added second adhesive material 500. Then, the first lens barrel 102 continues to approach the first lens 101, so that the bottom surface 1021 of the first lens barrel 102 is fully in contact with the liquid second adhesive material 500, and then the second adhesive material 500 is pre-cured by exposure to fix the first lens barrel 102 to the top surface 2021 of the second lens barrel 202. Fig.23 FIG. 1 is a schematic diagram showing exposure of the second adhesive material 500 . The arrows in the figure show the light used to expose the second adhesive material 500 . Fig.24 The semi-finished product state after pre-curing is completed is shown.

[0140] Step S4000, baking 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), so that the first adhesive material 300 and the second adhesive material 500 are permanently cured. Fig.25A As shown. In this step, since the design of the aforementioned escape groove 600 can ensure that the second adhesive material 500 has a gap, during the baking process, the cavity 1022 can be connected to the outside world through the venting sub-groove 601 and the gap of the second adhesive 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. In particular, the design of the aforementioned escape groove 600 can reduce glue painting errors caused by careless operation (for example, accidentally forming the second adhesive material 500 into a completely closed ring), which helps to improve the yield in mass production.

[0141] 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.

[0142] In this article, active calibration is to calibrate the relative position of the first lens component 100 and the second lens component 200 based on the actual resolution curve measured by the actual imaging of the optical system (i.e., an imageable optical system composed of four second lenses 201 and one first lens 101) to improve the imaging quality of the optical lens.

[0143] The active calibration described in the present application can adjust the relative positions of the first lens component 100 and the second lens component 200 in multiple degrees of freedom. Fig.32A The relative position adjustment method in active calibration in one embodiment of the present invention is shown. In this adjustment method, the first lens component 100 (or the first lens 101) can move relative to the second lens component 200 along the x, y, and z directions (that is, the relative position adjustment in this embodiment has three degrees of freedom). The z direction is the direction along the optical axis, and the x and y directions are the directions perpendicular to the optical axis. The x and y directions are both in an adjustment plane P, and the translation in the adjustment plane P can be decomposed into two components in the x and y directions.

[0144] Fig.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 Fig.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.

[0145] Further, Fig.32C The figure shows a relative position adjustment method with v and w direction adjustments added in the active calibration of another embodiment of the present invention. 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 can be synthesized into a vector angle, which represents the overall tilt state. In other words, by adjusting the v direction and the w direction, the tilt posture of the first lens component 100 relative to the second lens component 200 (that is, the tilt of the optical axis of the first lens component 100 relative to the optical axis of the second lens component 200) can be adjusted.

[0146] The adjustment of the six degrees of freedom of x, y, z, r, v, and w may affect the imaging quality of the optical system (for example, the resolution). In other embodiments of the present invention, the relative position adjustment method may be to adjust only any one of the six degrees of freedom, or a combination of any two or more thereof.

[0147] Furthermore, in one embodiment, in the active calibration step, the movement also includes translation on the adjustment plane, ie, movement in the x and y directions.

[0148] Further, in one embodiment, the active calibration further comprises: adjusting and determining the angle between the axis of the first lens 101 and the axis of the second lens component 200 according to the measured resolution of the optical system, that is, the adjustment in the w and v directions. In the assembled optical lens or camera module, the axis of the first lens 101 and the axis of the second lens component 200 may have a non-zero angle.

[0149] Furthermore, in one embodiment, the active calibration also includes: moving the first lens 101 along 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.

[0150] Further, in one embodiment, in the pre-positioning step (step 20), a gap is provided between the bottom surface of the first lens 101 and the top surface of the second lens component 200; and in the bonding step (step 40), the adhesive is arranged in the gap.

[0151] In one embodiment, the first lens 101 may be formed of a plurality of sub-lenses that are integrated with each other. In this embodiment, the side and top surfaces of the non-optical surface of the first lens 101 that are not used for imaging may form a light shielding layer. The light shielding layer may be formed by screen printing a light shielding material on the side and top surfaces of the first lens 101.

[0152] In one embodiment, in the active calibration step, the second lens component 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 the relative movement of the first lens 101 and the second lens component 200 in the above six degrees of freedom. The fixture may be supported or partially supported on the side of the first lens 101, thereby clamping the first lens 101.

[0153] It should be noted that in the above embodiment, the number of lenses of the first lens component 100 and the second lens component 200 can be adjusted as needed. For example, the number of lenses of the second lens component 200 can be one, two, three or five, etc. Correspondingly, the total number of lenses of the entire optical lens can also be adjusted as needed, for example, the total number of lenses of the optical lens can be six, or three, four or seven, etc.

[0154] It is worth noting that in the above embodiments, the first adhesive material needs to be coated with glue twice so that part or all of the sides of the first lens are wrapped. 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 the optical path of the active calibration needs to be avoided, 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 firstly coated in the gap between the bottom surface of the first lens and the top surface of the second lens barrel (or the second lens component), and after the glue material is pre-cured, the clamp is released, and then glue is coated on the side and top surface of the first lens for a second time (i.e., the first liquid adhesive is added around the first structural area and / or on the top surface), and cured, so that the first adhesive material wraps part or all of the sides of the first lens.

[0155] Further, Fig.26A schematic diagram of drawing the 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. 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 material is drawn on the top surface of the second lens component, and the top surface of the first adhesive material is controlled to be lower than 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 is always not in contact with the first adhesive material 300 (for example, during the active calibration process, the clamp is always higher than the top surface of the first adhesive material), so that the first adhesive material 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) and will not interfere with the clamp. At the same time, it can reduce one glue drawing, which helps to improve production efficiency.

[0156] 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 by drawing and cutting the adhesive. Fig. 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. Fig.28 Shown with Fig. 27 Specifically, when the first adhesive material is applied to the top surface of the second lens component (refer to Fig. 27 , as shown in the figure, the first glue material 300 is drawn on the top surface of the second lens barrel 202), and the first glue material 300 is not completely closed, that is, the first glue material can be a ring with a notch 309, and the notch is adapted to the clamping jaw 900 to form a gap that allows the clamping jaw 900 to pass. In this way, during the active calibration process (or the process in which the clamping jaw places the first lens to the position determined by the active calibration), the top surface of the first glue material can be higher than the contact point between the clamping jaw and the side of the first lens. After the bottom surface of the first lens contacts the top surface of the first glue material, the clamping jaw drives the first lens to continue to move downward, so that the top surface of the first glue material is higher than the top surface of the first lens (referring to the top surface of the first structural area), and the first glue 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 glue 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 glue material can also provide an escape hole for the subsequent baking step (the step of achieving permanent curing by baking) to avoid product defects caused by gas expansion during baking.

[0157] 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. Fig.31 A schematic diagram showing an embodiment of the present invention in which the top surface of the first structural area is set 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 set 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 set at a position close to the first optical area.

[0158] Further, it should be noted that the relative position of the first lens and the second lens component determined after active calibration may be such that the optical axis of the first lens and the optical axis of the second lens component 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, causing product defects. Fig.29 An example of interference between the first lens barrel and the first lens is shown. In one embodiment, after the active calibration step, the angle A between the optical axis of the first lens and the optical axis of the second lens component is obtained according to the recorded active calibration data, and in the step of covering the first lens barrel on the first lens, the angle B between the central axis of the first lens barrel and the optical axis of the second lens component is determined according to the obtained angle A between the optical axis of the first lens and the optical axis of the second lens component (for example, the difference between the angle B and the angle A is less than a preset threshold value) to avoid the first lens barrel interfering with (or colliding with) the first lens and causing product defects. Fig.30 An example of avoiding interference between the first lens barrel and the first lens by making the difference between the angle B and the angle A smaller than a preset threshold is shown.

[0159] Furthermore, according to an 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.

[0160] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical lens, characterized in that: include: A first lens component, comprising a first lens having a first optical zone for optical imaging and a first structural zone outside the first optical zone; a second lens component, comprising a second lens barrel and at least one second lens installed in the second lens barrel, wherein the at least one second lens and the first lens together constitute an imageable optical system, wherein the second lens has a second optical zone for optical imaging and a second structural zone outside the second optical zone, wherein the second structural zone and the second lens barrel constitute a structural zone of the second lens component, and a first gap is provided between a top surface of the structural zone of the second lens component and a bottom surface of the first structural zone; and A first adhesive material is located in the first gap and extends outwardly along the top surface of the structural area of ​​the second lens component and surrounds the first structural area, and the first adhesive material extending outwardly wraps at least a portion of the outer side surface of the first structural area; Among them, the first lens component also includes a first lens barrel, a second adhesive material is provided between the bottom surface of the first lens barrel and the top surface of the second lens barrel, and the first lens barrel is bonded to the second lens barrel through the second adhesive material; a cavity is provided between the outer side surface and the top surface of the first lens and the first lens barrel; the first lens component and / or the second lens component has an escape channel connecting the cavity with the outside, and the escape channel includes an escape groove; the second adhesive material forms a ring with a notch on the top surface of the second lens barrel, and the notch is located at the position of the escape groove.

2. The optical lens according to claim 1, characterized in that: 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.

3. The optical lens according to claim 1, characterized in that: The first adhesive material wraps the entire outer side surface of the first structural area.

4. The optical lens according to claim 3, characterized in that: The first adhesive material also covers the top surface of the first structural area.

5. The optical lens according to claim 4, characterized in that: The first adhesive material is black to cover the outer side surface and the top surface of the first structural area.

6. The optical lens according to claim 2, characterized in that: The first lens barrel 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.

7. The optical lens according to claim 6, characterized in that: The gas escape groove is located on the top surface of the second lens barrel and / or on the bottom surface of the first lens barrel.

8. The optical lens according to claim 7, characterized in that: The escaping groove includes a venting sub-groove and two glue-stopping sub-grooves respectively located on both sides of the venting sub-groove, and the glue-stopping sub-grooves accommodate the overflowed second glue material so that the venting sub-groove is not blocked by the second glue material.

9. The optical lens according to claim 7 or 8, characterized in that: The top surface of the first structural zone is inclined, and an end of the top surface of the first structural zone close to the first optical zone is higher than an end of the top surface of the first structural zone close to the outer side surface of the first structural zone.

10. The optical lens according to claim 1, characterized in that: The top surface of the second lens barrel is a flat surface, the first gap is located between the flat surface and the bottom surface of the first structural area, the first adhesive material is located in the first gap and extends outward along the flat surface and surrounds the first structural area, and the first adhesive material extending outward wraps at least a portion of the outer side surface of the first structural area.

11. A camera module, characterized in that: An optical lens comprising any one of claims 1 to 10.

12. An optical lens assembly method, characterized in that: include: Prepare a first lens component and a second lens component that are separated from each other, wherein the 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, the second lens component includes a second lens barrel and at least one second lens installed in the second lens barrel, the second lens having a second optical zone for optical imaging and a second structural zone outside the second optical zone, and the second structural zone and the second lens barrel constitute a structural zone of the second lens component; Pre-positioning the first lens component and the second lens component so that the first lens and the at least one second lens together form an imageable optical system; adjusting and determining a relative position of the first lens component and the second lens component based on active calibration; as well as The first lens and the second lens component are bonded together by a first adhesive, wherein a first gap is provided between a top surface of the structural area of ​​the second lens component and a bottom surface of the first structural area, the first adhesive is located in the first gap and extends outwardly along the top surface of the structural area of ​​the second lens component and surrounds the first structural area, and the first adhesive extending outwardly wraps at least a portion of an outer side surface of the first structural area; Arranging a liquid second adhesive material on the top surface of the structural area of ​​the second lens component, wherein the second adhesive material surrounds the periphery of the first adhesive material; as well as Covering the first lens with a first lens barrel to form an aperture, wherein the first lens barrel is moved above the first lens barrel, and then the first lens barrel is gradually brought close to the first lens barrel and the bottom surface of the first lens barrel is brought into contact with the second adhesive material, and after the first adhesive material and the second adhesive material are cured, the first lens barrel and the second lens assembly are fixed and maintained at a relative position determined by active calibration, wherein a cavity is provided between the outer side surface and the top surface of the first lens barrel and the first lens barrel; Among them, the first lens component and / or the second lens component has an escape channel connecting the cavity with the outside, and the escape channel includes an escape groove; the second adhesive material forms a ring with a notch on the top surface of the second lens barrel, and the notch is located at the position of the escape groove.

13. The optical lens assembly method according to claim 12, characterized in that: The step of bonding by the first adhesive material comprises: Arranging a first liquid adhesive material on the top surface of the structural area of ​​the second lens component; The first lens is moved to above the second lens component, and then gradually approaches the second lens component and contacts the first adhesive material, and the relative position of the first lens and the second lens component is adjusted to the relative position determined by the active calibration, wherein the arranged liquid first adhesive material is at least located in the first gap; Pre-curing the first adhesive material; and The first adhesive material is permanently cured.

14. The optical lens assembly method according to claim 13, characterized in that: In the pre-curing step, during the pre-curing process, the first lens and the second lens component are maintained in a relative position determined by active calibration by relying on an external pickup mechanism and / or a fixed platform. After pre-curing, the first lens and the second lens component are maintained in a relative position determined by active calibration by relying on the pre-cured first adhesive.

15. The optical lens assembly method according to claim 14, characterized in that: The pre-curing step includes exposing the first adhesive material to light.

16. The optical lens assembly method according to claim 15, characterized in that: The assembly method further comprises: Between the pre-curing step and the permanent curing step, a liquid first adhesive is added around and on the top surface of the first structural area, so that the first adhesive wraps all outer sides of the first structural area and covers the top surface of the first structural area.

17. The optical lens assembly method according to claim 15 or 16, characterized in that: The permanent curing step comprises: The pre-cured first adhesive material, the first lens and the second lens component are baked to make the first adhesive material permanently cured.

18. The optical lens assembly method according to claim 15, characterized in that: The assembly method further comprises: After the permanent curing step, adding a first liquid adhesive around and on the top surface of the first structural region, so that the first adhesive wraps all outer sides of the first structural region and covers the top surface of the first structural region; and The added first adhesive is cured.

19. The optical lens assembly method according to claim 16, characterized in that: The first adhesive material is black, and in the step of adding the liquid first adhesive material around and on the top surface of the first structural area, the first adhesive material on the top surface of the first structural area forms a stop.

20. The optical lens assembly method according to claim 19, characterized in that: The permanent curing step comprises: The pre-cured first adhesive material, the first lens, the first lens barrel and the second lens component are baked to make the first adhesive material permanently cured.

21. The optical lens assembly method according to claim 15 or 16, characterized in that: Arranging a liquid second glue material on the top surface of the structural area of ​​the second lens component comprises: After the pre-curing step, the second adhesive material is arranged on the top surface of the structural area of ​​the second lens component.

22. The optical lens assembly method according to claim 21, characterized in that: The permanent curing step comprises: The pre-cured assembly of the first adhesive material, the second adhesive material, the first lens, the first lens barrel and the second lens component is baked to permanently cure the first adhesive material and the second adhesive material.

23. The optical lens assembly method according to claim 22, characterized in that: In the preparation step, the top surface of the second lens barrel and / or the bottom surface of the first lens barrel has the gas escape groove.

24. The optical lens assembly method according to claim 21, characterized in that: In the preparation step, the air escape groove includes a venting sub-groove and two glue-blocking sub-grooves respectively located on both sides of the venting sub-groove; and In the step of arranging the second adhesive material in liquid form, the adhesive stopper groove accommodates overflowed second adhesive material, so that the ventilation sub-groove is not blocked by the second adhesive material.

25. The optical lens assembly method according to claim 13, characterized in that: In the step of arranging a liquid first adhesive material on the top surface of the structural area of ​​the second lens component, the first adhesive material forms a ring shape with a gap, and the gap is suitable for avoiding a capturing mechanism that captures the first lens from the side.

26. The optical lens assembly method according to claim 25, characterized in that: In the step of arranging a liquid first glue material on the top surface of the structural area of ​​the second lens component, the pickup mechanism is a clamping claw.

27. The optical lens assembly method according to claim 25, characterized in that: In the preparation step, the top surface of the first structural area is an inclined surface with a higher outer side and a lower inner side.

28. The optical lens assembly method according to claim 27, characterized in that: In the preparation step, an annular boss is provided on the top surface of the first structural area.

29. The optical lens assembly method according to claim 21, characterized in that: In the step of covering the first lens barrel on the first lens, the angle A between the optical axis of the first lens and the optical axis of the second lens component is determined so that the difference between the angle B and the angle A is less than a preset threshold.

30. A camera module assembly method, characterized in that: include: Assembling an optical lens using the optical lens assembly method according to any one of claims 12 to 29; as well as A camera module is assembled based on the optical lens.

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