Optical lens and corresponding camera module

Abstract

The present application relates to an optical lens, comprising: a first lens component comprising a first lens; a second lens component comprising a second lens barrel and at least one second lens mounted in the second lens barrel, the first lens component and the second lens component being coaxially arranged; and a bonding member formed after curing of a first glue, the first glue being arranged between the second lens barrel and the first lens and supporting the first lens and the second lens component after curing; wherein, on a projection plane perpendicular to an optical axis of the optical lens, the bonding member constitutes a circular ring with at least three notches; each of the notches corresponds to a central angle gamma of 10-15 degrees on the circular ring where the bonding member is located. The present application also provides a corresponding camera module. The present application can improve the process capability index and the yield of mass production of lens assembly by optimizing the shape and structure of the glue.

Description

Technical Field

[0001] This invention relates to the field of camera module technology, and more specifically, to compact optical lenses and corresponding camera modules. Background Technology

[0002] With the popularization of mobile electronic devices, the technology of compact camera modules used in mobile electronic devices to help users acquire images (such as videos or pictures) has developed and progressed rapidly. In recent years, camera modules have been widely used in many fields such as medical, security and industrial production.

[0003] To meet increasingly diverse market demands, high pixel count, small size, and large aperture are irreversible development trends for existing camera modules. However, achieving all three aspects—high pixel count, small size, and large aperture—within a single camera module is extremely challenging. For example, the compact design of smartphones and the increasing screen-to-body ratio have reduced the internal space available for front-facing camera modules, while the market is demanding ever-higher image quality from these modules.

[0004] In the field of compact camera modules (such as those used in mobile phones), the quality of optical imaging lenses and manufacturing errors during module packaging must be considered. Specifically, in the manufacturing process of optical imaging lenses, factors affecting lens resolution include errors in individual components and their assembly, errors in the thickness of lens spacers, errors in the fit between individual lenses, and variations in the refractive index of the lens material. Errors in individual components and their assembly include the optical surface thickness, optical surface sag, optical surface shape, radius of curvature, single-surface and inter-surface eccentricity, and tilt of the optical surface of each lens. The magnitude of these errors depends on the precision of the mold and the ability to control molding accuracy. Errors in the thickness of lens spacers depend on the processing precision of the components. Errors in the fit between individual lenses depend on the dimensional tolerances of the assembled components and the assembly precision of the lens. Errors introduced by variations in the refractive index of the lens material depend on the stability of the material and batch consistency. These errors affecting resolution accumulate and worsen, increasing with the number of lenses. Current solutions for improving resolution involve controlling the dimensions of relatively sensitive components and compensating for lens rotation. However, high-pixel, large-aperture lenses are highly sensitive and require stringent tolerances, leading to increasing difficulties in lens manufacturing and assembly. Furthermore, the long feedback cycle during assembly results in a low and highly volatile process capability index (CPK) for lens assembly, leading to a high defect rate. As mentioned above, because numerous factors affect lens resolution across multiple components, each factor has manufacturing precision limits. Simply improving the precision of individual components offers limited improvement capabilities, is costly, and fails to meet the market's ever-increasing demands for image quality.

[0005] The applicant proposes an assembly method for optical lenses or camera modules based on an active alignment (AOA) process. In this method, the relative positions of upper and lower sub-lenses are adjusted and determined using an AOA process. The upper and lower sub-lenses are then bonded together according to their determined relative positions to manufacture a complete optical lens or camera module. This solution can improve the process capability index (CPK) of mass-produced optical lenses or camera modules; it can relax the requirements for the precision of individual components (e.g., sub-lenses or photosensitive components used to assemble optical lenses or camera modules) and their assembly precision, thereby reducing the overall cost of optical imaging lenses and camera modules; and it enables real-time adjustment of various aberrations in the camera module during assembly, reducing defect rates, lowering production costs, and improving image quality.

[0006] The lens assembled based on the active calibration process described above can also be called a multi-group lens or a modular lens. For multi-group lenses, different lens group components (e.g., upper and lower sub-lenses) are connected using adhesive bonding, which must support the different lens group components (e.g., upper and lower sub-lenses) to permanently maintain the relative positions of the two sub-lenses at the positions determined by active calibration. To ensure reliable bonding, the optical lens often needs to be baked to cure the bonding and thus achieve the connection.

[0007] However, for multi-group lenses, the air between the two lens components expands during baking, impacting the components and altering their relative positions, leading to a decrease in optical performance. Furthermore, after the adhesive cures, both the cured adhesive and the two lens components need to maintain structural strength during subsequent testing and use to prevent significant negative impacts from environmental factors on lens reliability. This is especially true for split lenses assembled using active calibration processes, where the two lens components together form the imaging optical system. Even minor changes in the adhesive and its bonding surface can alter the shape or relative position of the optical surfaces of the imaging system. Therefore, in-depth research on the adhesive and the bonded components is necessary to ensure the assembled lens maintains stable optical performance over the long term.

[0008] In conclusion, there is an urgent need for a solution for multi-group optical lenses and camera modules that can maintain stable optical performance over a long period of time. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a solution for multi-group optical lenses and camera modules whose optical performance can be maintained stably over a long period of time.

[0010] To address the aforementioned technical problems, the present invention provides an optical lens comprising: a first lens component including a first lens; a second lens component including a second lens barrel and at least one second lens mounted within the second lens barrel, the first lens component and the second lens component being coaxially arranged; and an adhesive member formed by curing a first adhesive, the first adhesive being disposed between the second lens barrel and the first lens, and supporting the first lens and the second lens component after curing; wherein, on a projection plane perpendicular to the optical axis of the optical lens, the adhesive member forms an annulus having at least three notches; the central angle γ corresponding to each notch on the annulus containing the adhesive member is 10° to 15°.

[0011] The adhesive component comprises multiple arc-shaped adhesive sections, any two arc-shaped adhesive sections are separated by the notch, and the central angle θ corresponding to any one of the arc-shaped adhesive sections on the ring is at least 75°.

[0012] The first lens includes an optically effective area and a structural area surrounding the optically effective area. The adhesive bond bonds the bottom surface of the structural area of ​​the first lens to the top surface of the second lens barrel. The bottom surface of the first lens, the top surface of the second lens barrel, the top surface of the second lens closest to the object, and the adhesive bond constitute a first cavity. The notch of the adhesive bond constitutes an escape channel that allows the first cavity to communicate with the outside gas.

[0013] Wherein, after the first adhesive has fully cured, the notch is not filled or blocked, so as to maintain the gas communication between the first cavity and the outside.

[0014] The first lens component further includes a first lens barrel, with the first lens located inside the first lens barrel, but the inner side of the first lens barrel and the outer surface of the first lens do not abut against each other; the first lens barrel includes a first sidewall and a first top cover extending laterally inward from the top of the first sidewall, with a light-transmitting hole formed in the center of the first top cover; the first sidewall is located outside the outer side of the structural area of ​​the first lens, and the first top cover is located above the top surface of the structural area of ​​the first lens, with a gap of 5μm-10μm between the lower surface of the first top cover and the upper surface of the structural area of ​​the first lens; the bottom surface of the first sidewall of the first lens barrel is directly bonded to the second lens barrel with adhesive; multiple second lenses are assembled into a second lens group through the second lens barrel.

[0015] The adhesive has four notches and four arc-shaped adhesive sections, and for any one of the arc-shaped adhesive sections, the corresponding central angle θ is 75° to 80°.

[0016] The adhesive has three notches and three arc-shaped adhesive sections.

[0017] The first lens is made of glass, and the second lens barrel is made of plastic.

[0018] The at least three notches are evenly distributed on the ring where the adhesive is located.

[0019] A reinforcing adhesive layer is provided between the first lens and the second lens component. The reinforcing adhesive layer is disposed on the periphery of the adhesive component and is in the form of an open annulus.

[0020] The reinforcing adhesive layer is made of an adhesive with an elastic modulus lower than that of the bonding component.

[0021] The first adhesive material is applied to the top surface of the second lens barrel in a painted manner, and then cured by heating to form the adhesive component; the reinforcing adhesive layer is arranged around the adhesive component from the outer side of the first lens.

[0022] The outer surface of the first lens is partially covered by the reinforcing adhesive layer.

[0023] The reinforcing adhesive layer forms a ring with a second notch. During the adhesive application stage, the second adhesive is arranged into a closed ring. During heat curing, the second notch is formed by the impact of expanding gas. The second notch is located at one of the notches of the adhesive component. The inlet size of the second notch is larger than its outlet size. The inlet of the second notch is located on the side closer to the adhesive component, and the outlet of the second notch is located on the side away from the adhesive component.

[0024] The reinforcing adhesive layer is formed by a single continuous adhesive segment, and the reinforcing adhesive layer is provided with a single second notch, which is located in the same position as one of the notches of the adhesive component.

[0025] The second notch in the reinforcing adhesive layer is offset from the notch in the adhesive component.

[0026] The present invention also provides a camera module comprising: a photosensitive component having a photosensitive chip; and an optical lens as described in any of the foregoing embodiments; the optical lens being directly or indirectly mounted on the photosensitive component such that the photosensitive chip is adapted to receive light passing through the first lens and the at least one second lens and output imaging data.

[0027] The camera module further includes an optical actuator, the optical lens is mounted on the optical actuator, and is indirectly mounted on the photosensitive component through the optical actuator.

[0028] Compared with the prior art, this application has at least one of the following technical effects:

[0029] 1. This application can improve the process capability index (CPK) and mass production yield of lens assembly by optimizing the shape and structure of the adhesive.

[0030] 2. In some embodiments of this application, the circular arrangement of the first adhesive and the reasonable notch design prevent the expanding gas from impacting the surface shape and position of the optical elements of the split lens (especially the AOA split lens) during the curing (especially heat curing) stage of the first adhesive, thereby avoiding the degradation of optical imaging quality.

[0031] 3. In some embodiments of this application, the circular first adhesive arrangement, the length of the arc-shaped adhesive segment, and the reasonable notch design can effectively ensure that the optical imaging quality of the split lens is stable and reliable during various tests and long-term use.

[0032] 4. In some embodiments of this application, after the first adhesive cures to form the bonded part, its gap is retained (i.e., the gap is not filled with adhesive to seal it), and a reinforcing adhesive layer disposed around it achieves dustproof function while maintaining the air pressure balance inside and outside the lens. In this way, the optical imaging quality of the split lens (especially the AOA split lens) can be degraded due to excessive air pressure inside the lens during various tests and long-term use, and the phenomenon of adhesive delamination can also be avoided. Attached Figure Description

[0033] Figure 1 A longitudinal cross-sectional schematic diagram of an optical lens fabricated using an active calibration process according to an embodiment of this application is shown.

[0034] Figure 2 A longitudinal cross-sectional schematic diagram of a camera module according to an embodiment of this application is shown;

[0035] Figure 3 A schematic diagram of the second lens component in one embodiment of this application is shown from a top-down angle;

[0036] Figure 4 A schematic diagram of the second lens component in another embodiment of this application is shown from a top-down angle;

[0037] Figure 5 The notch and the arc angle of the curved bonding section of the bonded component are shown from a top-down view.

[0038] Figure 6 An adhesive member with a venting structure is shown in one embodiment of this application;

[0039] Figure 7 A cross-sectional schematic diagram of a split lens with inner and outer double-layer adhesive is shown in some embodiments of this application;

[0040] Figure 8 It shows Figure 7 A magnified view of a portion of the adhesive area of ​​a split-type lens;

[0041] Figure 9 A top view schematic diagram of an optical lens with a double-layered adhesive layer and a pointed notch is shown;

[0042] Figure 10 A top view schematic diagram of an optical lens with a fabric notch according to another embodiment of this application is shown;

[0043] Figure 11 It shows Figure 10 The arc angle α of the air vent in the middle;

[0044] Figure 12 The gap between the first lens and the second lens components and the thickness of the adhesive are shown.

[0045] Figure 13 An example of a lens with a notch is shown;

[0046] Figure 14 A cross-sectional schematic diagram of a photosensitive component according to one embodiment of this application is shown. Detailed Implementation

[0047] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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.

[0048] It should be noted that in this specification, the terms "first," "second," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first subject discussed below may also be referred to as the second subject.

[0049] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for ease of illustration. The drawings are for illustrative purposes only and are not drawn to scale.

[0050] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed feature, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0051] As used herein, the terms “basically,” “approximately,” and similar terms are used as terms of approximation rather than terms of degree, and are intended to describe inherent biases in measured or calculated values ​​that will be recognized by those skilled in the art.

[0052] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so specified herein.

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0054] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0055] According to one embodiment of this application, an optical lens manufactured based on an active calibration process is provided. The optical lens includes a first lens component, a second lens component, and an adhesive. The first lens component includes at least a first lens (which may be a single lens). The second lens component includes a second lens barrel and at least one second lens mounted within the second lens barrel. The first and second lens components are coaxially arranged, and the first lens and the at least one second lens together constitute an optical system for imaging. The adhesive is formed by curing a first adhesive, which is disposed between the second lens barrel and the first lens. After curing, the adhesive supports the first lens and the second lens component, maintaining their relative positions at the relative positions determined by active calibration. Active calibration is a manufacturing process that adjusts the relative positions of the two optical systems (i.e., two lens groups) based on the actual imaging data of the optical system received and output by a photosensitive element (e.g., a photosensitive chip). In this application, on a projection plane perpendicular to the optical axis, the adhesive forms an annulus with at least two notches, the at least two notches being uniformly distributed on the annulus containing the adhesive. The central angle of the arc segment formed by the notch in the circumferential direction of the ring is 10° to 15°. For ease of description, the central angle corresponding to the arc is referred to as the arc angle in this article, which can be referred to in conjunction with reference. Figure 5Wherein, the arc angle γ represents the central angle of the arc segment corresponding to the notch in the circumferential direction of the ring. The meaning of the arc angle will not be elaborated further below. The inventors of this case have conducted in-depth research and discovered that a notch of this size can result in a high process capability index (CPK) and a high actual mass production yield for lens assembly. On the one hand, this size of notch allows the expanding gas generated during the heating and curing process of the first adhesive material to be quickly discharged, preventing the expanding gas from accumulating inside the lens and exerting excessive pressure on components such as the first lens, second lens, and second lens barrel in localized areas. This, in turn, prevents changes in the surface shape of the first and second lenses or deviations in their relative positions. On the other hand, the notch is not too large. Combined with the annular first adhesive application method, the adhesive component of this embodiment has good adhesion and can withstand high and low temperature shocks encountered during testing or use of the optical lens, avoiding delamination. The following is a combination of... Figures 1-4 A series of embodiments of this application are described.

[0056] Figure 1 A longitudinal cross-sectional schematic diagram of an optical lens fabricated using an active calibration process according to an embodiment of this application is shown. (Reference) Figure 1 According to one embodiment of this application, the optical lens 10 is a split lens, comprising at least two lens components. For ease of explanation, in various embodiments of this application, the optical lens 10 comprising two lens components is used as an example, that is, the optical lens 10 comprising a first lens component 11 and a second lens component 12 is used as an example. Of course, those skilled in the art should know that the optical lens 10 according to the embodiments of this application may also include a greater number of lens components. In this embodiment, the optical lens 10 comprises a first lens component 11 and a second lens component 12, the first lens component 11 and the second lens component 12 constituting a complete optical system, that is, the optical system composed of the first lens component 11 and the second lens component 12 can clearly image on the photosensitive component. The first lens component 11 is bonded to the second lens component 12 by an adhesive 20 (described in detail below). Preferably, the first lens component 11 is bonded and fixed to the light-incident side of the second lens component 12, that is, the first lens component 11 is close to the object side of the camera module, and the second lens component 12 is close to the image side of the camera module. Figure 1 In the middle, the light-incident side is located above and the light-outceasing side is located below, so the first lens component 11 is bonded and fixed above the second lens component 12. Figure 2 A longitudinal cross-sectional schematic diagram of a camera module according to an embodiment of this application is shown. (Reference) Figure 2The camera module 100 includes an optical lens 10 and a photosensitive component 30. The optical lens 10 is held in the photosensitive path of the photosensitive component, so that the photosensitive component can receive light projected from the optical lens 10 for imaging.

[0057] Further, in some embodiments of this application, the first lens includes an optically effective area and a structural area surrounding the optically effective area, and the adhesive bonding the bottom surface of the structural area of ​​the first lens and the top surface of the second lens barrel. For ease of description, the cavity formed by the bottom surface of the first lens, the top surface of the second lens barrel, the top surface of the second lens closest to the object side, and the adhesive bonding is referred to as the first cavity. The notch in the adhesive bonding constitutes an escape channel that allows the first cavity to communicate with external gas. In this embodiment, after the first adhesive has completely cured, the notch is not blocked with filler to maintain communication between the first cavity and external gas. The following describes... Figure 1 The following description is provided. Since the structural region is typically located in the edge region of the lens, it may be referred to as the outer edge in the following embodiments. Still referring to... Figure 1In some embodiments of this application, the first lens component 11 includes a first lens 111 and a first lens barrel 112. The first lens 111 is housed and mounted in the first lens barrel 112. The first lens 111 has a circular protrusion 1111 at its center for optical imaging and a platform outer edge 1112 at its periphery. During imaging, the protrusion 1111 of the first lens 111 is an optical area that allows light to pass through for imaging, while the outer edge 1112 is a structural area surrounding the optical area. It should be understood that in other embodiments of this application, the first lens component 11 may be implemented as a "bare lens," comprising only one first lens 111. Corresponding to the structure of the first lens 111, the first lens barrel 112 includes a first lateral extension 1121 and a first longitudinal extension 1122, and the first lens 111 is housed in the receiving space formed by the first lateral extension 1121 and the first longitudinal extension 1122. It is worth mentioning that, in one embodiment of this application, the first lateral extension portion 1121 and the first longitudinal extension portion 1122 can be integrally formed by processes such as injection molding (i.e., the first lens barrel 112 is an integrally formed component); or, the first lateral extension portion 1121 and the first longitudinal extension portion 1122 can be separately formed and then assembled together to form the first lens barrel 112. The first lateral extension portion 1121 extends inward from the top of the first lens barrel 112. The first lateral extension portion 1121 has an inner surface whose inner diameter gradually decreases along the incident light direction. The protrusion 1111 of the first lens is accommodated in the receiving space formed by the inner surface of the first lateral extension portion 1121, providing sufficient space for the incident light. Furthermore, the inner surface of the first lateral extension portion 1121 can further reduce the generation of side stray light. From the light incident direction, the first lateral extension portion 1121 blocks the outer edge 1112 of the first lens 111 and at least a portion of the protrusion 1111 of the first lens 111. In this embodiment, "inward" refers to the direction toward the optical axis; "outward" refers to the direction away from the optical axis. The first lateral extension portion 1121 is disposed above the outer edge portion 1112 of the first lens 111, and the first lateral extension portion 1121 is disposed above the upper surface of the first lens 111. An air gap exists between the bottom surface of the first lateral extension portion 1121 and the upper surface of the outer edge portion 1112 of the first lens 111 (i.e., the bottom surface of the first lateral extension portion 1121 and the upper surface of the outer edge portion 1112 of the first lens 111 do not abut against each other, and no glue is filled between them, thereby retaining an air gap), so as to effectively reduce the impact of changes in the state of the first lens barrel 112 on the state of the first optical lens.For example, when the first lens barrel 112 is displaced or deformed due to external force, it will not directly affect the state (including its position and shape) of the first lens 111, thus protecting the first lens 111 from direct external force or indirect influence from the first lens barrel 112, thereby improving the reliability of the optical lens. In this embodiment, the gap between the first lateral extension portion 1121 of the first lens barrel 112 and the upper surface of the first lens 111 is in the range of 5μm-10μm. The first longitudinal extension portion 1122 extends downward from the bottom of the first lens barrel 112, and the first longitudinal extension portion 1122 is a ring structure and is fixed above the second lens component 12.

[0058] The optical lens 10 directly affects the imaging quality of the camera module 100. In multi-lens systems, different lens components are connected using adhesives 20, so the optical lens 10 often needs to be baked to cure the adhesives 20 and achieve the connection. During assembly, in order to reliably connect the first lens 111 and the second lens component 12, an adhesive 20 needs to be provided between the first lens 111 and the second lens barrel 121. The adhesive 20 is used to support the first lens 111 and the second lens component 12 after curing and to maintain their relative positions as determined by active calibration. Preferably, the adhesive 20 is made of UV thermosetting adhesive, which can be pre-cured by light and then fully cured by baking. However, since the air between the first lens component 11 and the second lens component 12 will expand during baking, the expanding gas will impact the first lens component 11 and the second lens component 12, thereby changing their relative positions and causing a decrease in light performance. Therefore, an escaping channel 40 is required (see reference). Figure 3 , Figure 3A schematic diagram of the second lens component in one embodiment of this application is shown from a top view. The diagram shows an adhesive element (a non-closed annular structure formed by applying adhesive to the top surface of the second lens barrel). The venting channel 40 connects the air inside the optical lens 10 to the outside environment, allowing the expanding gas to escape during baking. This prevents the expanding gas from exerting excessive pressure on the adjacent first lens component 11 and second lens component 12, which could cause a shift in the relative position of the first lens 111 and the second lens barrel 121 or deformation of the optical effective area of ​​the optical element (e.g., the first or second lens), thereby affecting optical performance. In this embodiment, on a projection plane perpendicular to the optical axis, the adhesive element forms an annular structure with at least two notches, which are evenly distributed on the annular structure. Furthermore, the arc angle γ of the notches in the circumferential direction of the annular structure is 10° to 15°. As mentioned above, the inventors of this application have discovered through in-depth research that this size of notch allows for a high process capability index (CPK) and high actual mass production yield in lens assembly. On the one hand, the size of the notch allows the expanding gas generated during the heating and curing process of the first adhesive to escape quickly, preventing the gas from accumulating inside the lens and exerting excessive pressure on components such as the first lens, second lens, and second lens barrel in localized areas. This, in turn, prevents changes in the surface shape of the first and second lenses or deviations in their relative positions. On the other hand, the notch is not too large. Combined with the annular dispensing method of the first adhesive, the adhesive component of this embodiment has good bonding strength and can withstand the high and low temperature shocks that occur during the testing or use of the optical lens, preventing delamination.

[0059] Specifically, the inventors have improved the arrangement of the adhesive component 20. In one embodiment of this application, the adhesive component 20 may be composed of three arc-shaped adhesive sections. Correspondingly, there are three venting channels 40, and the arc-shaped adhesive sections are spaced apart from the venting channels 40. Viewed from one side of the axis of the first lens 111, the adhesive component 20 is C-shaped. Increasing the number of venting channels 40 can increase the venting volume, which helps the expanding gas in the sealed space to escape quickly, thus avoiding excessive impact on adjacent components, which could cause the relative position of the first lens 111 and the second lens barrel 121 to shift or the optical system components to deform. Under high and low temperature shocks, the expansion and contraction deformation of the glass first lens 111 and the plastic second lens barrel 121 will be different, which will create stress between the first lens 111 and the second lens barrel 121. Increasing the number of arc-shaped adhesive sections can disperse the stress, and the dispersed stress will be reduced, making it less likely for delamination to occur. On the other hand, in this embodiment, the arc angle θ of each arc-shaped bonding segment in the circumferential direction of the ring is at least 75°, so that each arc-shaped bonding segment has a large bonding area, which helps to improve the structural strength of the bonding component and increase its bonding force, so that the bonding component can stably and reliably support the first lens component and the second lens component, and maintain them in the relative position determined by active calibration for a long time.

[0060] Furthermore, Figure 4 A schematic diagram of a second lens component from another embodiment of this application is shown from a top-down perspective. (Referring to the reference...) Figure 1 , Figure 2 and Figure 4 In another embodiment of this application, the adhesive element 20 may be composed of four arc-shaped adhesive segments. For any one of the arc-shaped adhesive segments, the arc angle θ in the circumferential direction of the ring is 75° to 80° (see reference). Figure 5 , Figure 5The diagram shows the notch of the adhesive and the arc angle of the arc-shaped adhesive section from a top-down view. From a top-down view, each adhesive section is fan-shaped. The four arc-shaped adhesive sections are axially symmetrical about the first lens 111, and on a projection plane perpendicular to the optical axis of the first lens 111, the four arc-shaped adhesive sections are centrally rotationally symmetrical. The adhesive 20 is in the form of four C-shapes, and the line connecting the adhesive 20 forms a circular ring. Viewed perpendicular to the axis of the first lens 111, the four air escape channels 40 are centrally symmetrical about the optical axis of the first lens 111. The adhesive 20 includes a first adhesive 21, a second adhesive 22, a third adhesive 23, and a fourth adhesive 24. The first adhesive 21 and the second adhesive 22 are symmetrically arranged along the axis of the first lens 111, and the third adhesive 23 and the fourth adhesive 24 are symmetrically arranged along the axis of the first lens 111. The first adhesive component 21, the second adhesive component 22, the third adhesive component 23, and the fourth adhesive component 24 are arranged circumferentially along the first lens 111 and the second lens barrel 121, and distributed on the same circumference. The four venting channels 40 increase the venting capacity, facilitating the rapid escape of expanding gas within the confined space, thus avoiding excessive impact on adjacent components and preventing displacement of the relative positions of the first lens 111 and the second lens barrel 121 or deformation of optical system components. Under high and low temperature shocks, the expansion and contraction deformations of the glass first lens 111 and the plastic second lens barrel 121 will differ, resulting in stress between them. The four adhesive components 20 and the four venting channels 40 can disperse this stress, reducing its intensity and minimizing the likelihood of delamination. Furthermore, the four arc-shaped bonding sections are symmetrically arranged about the axis of the first lens 111, which allows for a symmetrical stress distribution between the first lens 111 and the second lens barrel 121. The first lens 111 and the second lens barrel 121 are evenly stressed in their respective circumferential directions, preventing any misalignment between their relative positions. On the other hand, in this embodiment, the arc angle θ of each arc-shaped bonding section in the circumferential direction of the ring is at least 75°. This gives each arc-shaped bonding section a large bonding area, which helps to improve the structural strength and adhesive force of the bonded component. This ensures that the bonded component stably and reliably supports the first and second lens components, maintaining them in the relative positions determined by active calibration over a long period.

[0061] Furthermore, in some embodiments of this application, the first lens 111 may be made of resin. The coefficient of thermal expansion (CTE) of the resin lens and the material of the second lens barrel 121 (e.g., plastic) is relatively close (compared to glass lenses). Therefore, under high and low temperature shocks, the deformation of the first lens 111 is relatively close to that of the plastic second lens barrel 121, and the amount of displacement of the relative positions of the first lens 111 and the second lens barrel 121 is relatively small.

[0062] In some embodiments of this application, the first lens 111 may be made of glass. Glass lenses have advantages such as high transmittance, high refractive index, and low astigmatism, which are beneficial for improving the imaging quality of the lens and reducing the lens height. The specific manufacturing process of the glass lens may be molding glass process or WLG wafer-level glass technology. However, when the first lens 111 is made of glass, the coefficient of thermal expansion (CTE) of glass material is different from that of the plastic material of the second lens barrel 121. Under high and low temperature shocks, the deformation of the glass first lens 111 is different from that of the plastic second lens barrel 121 and the adhesive. Therefore, the relative position of the first lens 111 and the second lens barrel 121 may shift, and the glass first lens 111 may even break during the process of resisting temperature changes. The inventors discovered that under high and low temperature shocks, the expansion and contraction deformation of the first lens 111 (made of glass) and the second lens barrel 121 (made of plastic) differs, resulting in stress between them. At areas of stress concentration, the first lens 111 and the second lens barrel 121 are prone to separating from the adhesive component 20, causing delamination (meaning the adhesive component 20 detaches or breaks, resulting in delamination or breakage). Therefore, providing a larger number (e.g., four) of notches on the adhesive component 20 better accommodates situations where the first lens 111 is made of glass.

[0063] Furthermore, in some embodiments of this application, the thickness of the adhesive 20 ranges from 30µm to 100µm, preferably, the average thickness of the adhesive 20 is 60µm. The thickness refers to the dimension of the adhesive 20 along the axis (i.e., optical axis) of the first lens 111. Figure 12 The gap between the first lens and the second lens component and the thickness of the adhesive are shown. (Reference) Figure 12The thickness of the adhesive component 20 is the distance H between its top and bottom surfaces. Since the top surface of the adhesive component 20 is bonded to the bottom surface of the first lens 111 and the bottom surface of the adhesive component 20 is bonded to the top surface of the second lens barrel 121, the thickness can also be referred to as the height between the bottom surface of the first lens 111 and the top surface of the second lens barrel 121, or the gap height between the bottom surface of the first lens 111 and the top surface of the second lens barrel 121. During the adhesive application stage, the thickness of the first adhesive applied to each bonding section can be consistent, so that after the adhesive component 20 cures, the shear strength of each bonding section is relatively similar. However, it should be noted that when the first lens component and the second lens component are bonded after active calibration, the tilt angle of the first lens relative to the second lens barrel 121 may be adjusted during the active calibration process to improve image quality, so the thickness of each bonding section in the final state may be different. On the other hand, in this embodiment, the arc angle θ of each arc-shaped bonding segment in the circumferential direction of the ring is at least 75°, so that each arc-shaped bonding segment has a large bonding area, which helps to improve the structural strength of the bonding component and increase its bonding force, so that the bonding component can stably and reliably support the first lens component and the second lens component, and maintain them in the relative position determined by active calibration for a long time.

[0064] Furthermore, in some embodiments of this application, the width of each bonding segment of the adhesive member 20 may be the same. This width refers to the width viewed from a top angle, that is, the dimension in the radial direction of the ring in which the adhesive member 20 is located. The adhesive member 20 may include a first adhesive member 21, a second adhesive member 22, a third adhesive member 23, and a fourth adhesive member 24, and the widths of the first adhesive member 21, the second adhesive member 22, the third adhesive member 23, and the fourth adhesive member 24 may be exactly the same. The width of each adhesive member (or bonding segment) ranges from 200 μm to 300 μm. Preferably, the width of the bonding segment may be 260 μm.

[0065] Furthermore, in some embodiments of this application, the adhesive 20 is disposed between the bottom surface of the outer edge 1112 of the first lens 111 and the top surface of the second lens barrel 121. A safety groove is provided on the side of the top surface of the second lens barrel 121 near the optical axis, and the safety groove is disposed inside the adhesive 20. The outermost side of the adhesive 20 does not exceed the maximum outer diameter of the outer edge 1112 of the first lens 111, and the innermost side of the adhesive 20 does not exceed the safety groove. The width of the adhesive 20 is limited between the maximum outer diameter of the outer edge 1112 of the first lens 111 and the safety groove. The safety groove can be a recess to prevent the first adhesive used to form the adhesive 20 from overflowing.

[0066] Furthermore, in actual mass-produced products, some lenses manufactured using certain production methods have a notch, meaning that when viewed from above, the lens is not a regular circle but rather a "D" shape. This is because during the molding or injection molding process, the molding cavity needs to retain at least one inlet for injecting liquid molding material (such as liquid resin). After molding, a protrusion will form at this inlet. Cutting off this protrusion results in a "D" shape for the lens. Figure 13 An example of a lens with a notch is shown. (Reference) Figure 13 The outer edge 1112 of the lens has a notch 1113. The inventors discovered that for this type of "D"-shaped first lens, the stress near the notch (i.e., the cut surface) is relatively high. Therefore, for the adhesive 20, the arc-shaped adhesive section near the notch can be improved; for example, the width of the arc-shaped adhesive section near the notch can be reduced, thereby reducing the stress generated in the adhesive section near the notch and thus minimizing the impact of the adhesive section on the stress at the notch. In other words, in the adhesive 20, the width of the arc-shaped adhesive section closest to the notch can be smaller than the width of other arc-shaped adhesive sections.

[0067] In some embodiments of this application, from a top-view angle, the two ends of the adhesive 20 form an angle θ with the axis of the first lens 111, where the angle θ ranges from 75° to 80°. When the angle θ is within the range of 75° to 80°, it not only ensures that the venting channel 40 will not be blocked after the adhesive 20 has cured, but also allows for the maximum utilization of the adhesive 20. When the amount of adhesive in the adhesive 20 is sufficiently large, it provides sufficient bonding force between the first lens 111 and the second lens barrel 121, thereby ensuring a stable connection between them. This avoids the problem of relative positional misalignment between the first lens 111 and the second lens barrel 121, and also prevents damage to the optical lens 10 caused by separation of the first lens 111 and the second lens barrel 121.

[0068] In some embodiments of this application, the adhesive 20 is provided with four venting channels 40, each of the same size and dimensions, ensuring uniform stress on the first lens 111 and the second lens barrel 121 in their respective circumferential directions. The four venting channels 40 disperse the stress, reducing its intensity and preventing delamination. Viewed from one side of the axis of the first lens 111, the two ends of each venting channel 40 form an angle γ with the axis of the first lens 111, where the angle γ ranges from 10° to 15°. When the angle γ is within the range of 10° to 15°, the amount of adhesive used in the adhesive 20 can be optimized, and the venting channels 40 will not be blocked after the adhesive 20 cures. In other words, when the γ angle is less than 10°, the air escape channel 40 is too small, and the adhesive 20 will cause the air escape channel 40 to be blocked after curing. This will cause the air in the first lens 111 and the second lens barrel 121 to expand due to heat during baking, which will seriously affect the relative position accuracy between the two groups after active calibration. When the γ angle is greater than 15°, the adhesive amount of the adhesive 20 may be too small, resulting in insufficient bonding force. This may lead to the relative position of the first lens 111 and the second lens barrel 121 being offset. In more serious cases, it may also cause the first lens 111 and the second lens barrel 121 to separate, damaging the optical lens 10.

[0069] Furthermore, Figure 6 An adhesive member with a venting structure according to one embodiment of this application is shown. Reference Figure 6 In some embodiments of this application, in the radial direction of the annulus containing the adhesive member 20, the escaping channel 40 includes an inlet section 41, a middle section 42, and an outlet section 43. In the circumferential direction of the annulus, the dimensions of both the inlet section 41 and the outlet section 43 are larger than the dimension of the middle section 42. In other words, the middle section of the escaping channel 40 is small, while the openings at both ends are large. Both the inlet section 41 and the outlet section 43 form guiding structures, facilitating the rapid discharge of expanded gas.

[0070] It is worth noting that in the prior art, after dispensing, bonding, and curing, the bonded component usually needs to be sealed to prevent dust or other contaminants from entering the optical lens 10 through the venting channel 40. However, in some embodiments of this application, after the first adhesive is dispensed, bonded, and cured, the venting channel 40 of the bonded component 20 is not filled with a sealant, but rather left unobstructed. After the optical lens 10 is assembled, it is usually necessary to conduct tests such as high and low temperature shock and high temperature and humidity tests on the optical lens 10. In optical lenses based on active calibration processes, the bonded component plays the role of supporting two (or more) lens components. It needs to maintain the relative positions of each lens component so that the optical imaging system remains in the state determined by active calibration. The inventors of this application have found that for lenses based on active calibration (AOA lenses), during tests such as high and low temperature shock and high temperature and humidity tests, the gas inside the lens, under the influence of environmental factors, will have a significant impact on the relative position and surface shape of the optical elements. Specifically, in the aforementioned embodiment, the bottom surface of the first lens, the top surface of the second lens barrel, the top surface of the second lens closest to the object side, and the adhesive component constitute a first cavity. The notch in the adhesive component forms an escape channel that connects the first cavity to the external gas. If the escape channel is directly filled with a sealant, the gas inside the first cavity will rapidly expand or contract due to changes in environmental parameters during high and low temperature shock and high temperature and humidity tests. This will cause the first lens, the second lens, and the second lens barrel to be compressed, resulting in a deterioration in the optical performance of the optical imaging system, which in turn leads to a decrease in mass production yield and a decrease in the lens assembly process capability index (CPK). By keeping the escape channel unobstructed, the air pressure inside and outside the optical lens 10 (referring to the inside and outside of the first cavity) will be consistent, thereby preventing the optical lens 10 from being compressed and deformed due to air pressure differences.

[0071] Furthermore, Figure 7 A cross-sectional schematic diagram of a split lens with inner and outer double-layer adhesive is shown in some embodiments of this application. Figure 8 It shows Figure 7 A magnified view of a portion of the adhesive area of ​​a split-type lens. (Reference) Figure 7 and Figure 8 In conjunction with references Figure 1In some embodiments of this application, after the adhesive component 20 has cured, a reinforcing adhesive layer (hereinafter referred to as adhesive layer 50) can be provided on the outside of the adhesive component 20. The adhesive layer 50 can be used to prevent dust or other dirt from entering the optical lens 10 through the venting channel 40, thereby eliminating the need for a sealant in the venting channel 40. On the other hand, the adhesive layer 50 can further increase the connection strength between the first lens 111 and the second lens barrel 121 (i.e., it plays a reinforcing role). Specifically, the adhesive layer 50 is provided on the outside of the adhesive component 20, covering at least a portion of the first lens 111 and the second lens barrel 121. The adhesive layer 50 is bonded to the side of the outer edge 1112 of the first lens 111, and the height of the adhesive layer 50 does not exceed 2 / 3 of the height of the side wall of the outer edge 1112 of the first lens 111 (i.e., the adhesive layer 50 is located in the area below 2 / 3 of the height of the outer side of the first lens structure area). In some embodiments, the adhesive layer 50 is bonded to the top surface of the second lens barrel 121. The adhesive layer 50 may use an adhesive with a lower elastic modulus (or a softer adhesive) than the adhesive member 20.

[0072] When the first lens 111 is made of glass, the adhesive layer 50 is applied to the outer periphery of the first lens 111, which has a more significant effect on the image quality and long-term reliability of the lens. Specifically, because the coefficient of thermal expansion (CTE) of glass and the plastic material of the second lens barrel 121 are different, the expansion and contraction deformation of the glass first lens 111 and the plastic second lens barrel 121 will be different under high and low temperature shocks. This will create stress between the first lens 111 and the second lens barrel 121, and the presence of stress may cause the adhesive component 20 to detach and break, i.e., delamination or adhesive breakage. The adhesive layer 50 can disperse the stress, thereby preventing the adhesive component 20 from being damaged. In other words, the adhesive layer 50 can protect the adhesive component 20.

[0073] Furthermore, in one embodiment of this application, the adhesive element 20 is achieved by dispensing adhesive, while the adhesive layer 50 is achieved by spraying adhesive. The adhesive layer 50 may or may not be in contact with the adhesive element 20; this application does not impose any restrictions on this. The adhesive layer 50 and the adhesive element 20 can be implemented using the same type of adhesive. Of course, they can also be implemented using adhesives of different materials, wherein the elastic modulus of the adhesive in the adhesive layer 50 can be lower than the elastic modulus of the first adhesive in the adhesive element 20.

[0074] Furthermore, in one embodiment of this application, the adhesive layer 50 may surround the adhesive member 20, that is, a complete ring of adhesive layer 50 is provided in the circumferential direction around the adhesive member 20, and the adhesive layer 50 is annular when viewed from a top angle. During the baking process, the air inside the first lens 111 and the second lens barrel 121 expands due to heat, and the expanded gas overflows through the venting channel 40. Therefore, a sharp-angled notch (i.e., the second notch 52, see reference) is generated on the adhesive layer 50 at the position opposite to the venting channel 40 due to the impact of the gas. Figure 9 , Figure 9 A top view schematic diagram of a double-layer adhesive-coated optical lens with a pointed notch is shown. The first lens component is omitted to clearly show the shapes of the adhesive layer 50 and the adhesive member 20. The tip of the pointed notch faces away from the axis, and the pointed notch connects the interior space of the optical lens 10 to the external space. In other words, the reinforcing adhesive layer may have a second notch, which is pointed. The second notch is formed during the heat curing of the adhesive under the impact of expanding gas (referring to expanding gas from the adhesive member and the interior of the reinforcing adhesive layer). The inlet size of the second notch is larger than its outlet size, thus making the second notch pointed. The inlet of the second notch is located on the side closer to the adhesive member, and the outlet of the second notch is located on the side away from the adhesive member. Specifically, after the adhesive member 20 has cured, a second adhesive is applied around the first adhesive member 20. During this application stage, the second adhesive can be arranged in a closed annular shape. During heat curing, the expanding gas impacts the second adhesive to form the second notch 52 (see reference). Figure 9The second notch is located at one of the notches in the adhesive 20. Typically, there is a certain air gap between the second adhesive and the outer surface of the adhesive 20 (note that while the second adhesive can contact the outer surface of the adhesive 20, an air gap often remains). When the second adhesive is heated and cured, expanding gas escapes from various escaping channels of the adhesive 20. When the second adhesive corresponding to one of the escaping channels is broken, the gas is discharged from that break, and the air pressure at other escaping channels rapidly decreases. The corresponding section of the second adhesive is no longer impacted and maintains its original shape for complete curing. Therefore, the adhesive layer 50 produced by this method typically has only one second notch, and this second notch is angled. This angled second notch ensures that the gas inside the lens first cavity (refer to the previous description) is connected to the outside, while also effectively preventing dust (or other small particles) from entering the lens. In another embodiment, during the application stage of the second adhesive, a second notch can be directly provided in the second adhesive. The position of the second notch is directly opposite one of the notches in the adhesive component 20, and the arc angle of the second notch can be smaller than the arc angle of the notch in the adhesive component 20. In this way, during the heating and curing process of the second adhesive, the expanding gas will also impact the area near the second notch of the second adhesive to a certain extent, thereby making the second notch sharp-angled.

[0075] Furthermore, Figure 10 A top view schematic diagram of an optical lens with an adhesive notch according to another embodiment of this application is shown, in which the first lens component is removed to clearly show the shapes of the adhesive layer 50 and the adhesive member 20. Reference Figure 10 In other embodiments of this application, a third notch as an vent hole 51 may be provided on the adhesive layer 50 during the adhesive application stage, allowing the heated and expanding air inside the first lens 111 and the second lens barrel 121 to escape directly through the vent hole 51. For example, an vent hole 51 is provided on the adhesive layer 50, and the vent hole 51 of the adhesive layer 50 is opposite to the venting channel 40 of the adhesive member 20. From a top-view angle, the arc angle α corresponding to the vent hole 51 of the adhesive layer 50 can be the same as the arc angle γ of the notch in the adhesive member 20 (see reference). Figure 11 , Figure 11 It shows Figure 10 The venting hole 51 in the adhesive layer 50 may not be opposite to the venting channel 40 of the adhesive component 20; that is, the venting hole 51 and the venting channel 40 may be misaligned. This arrangement can further prevent the entry of dust or other dirt. The number of venting holes 51 may be greater than one, such as two, three, or four, and this application does not limit this.

[0076] In some embodiments of this application, the reinforcing adhesive layer is made with the same adhesive as the bonding member, and the reinforcing adhesive layer is also disposed on the top surface of the second lens barrel by dispensing, and the width of the bonding member in the radial direction of its ring is greater than the width of the reinforcing adhesive layer in the radial direction of its ring.

[0077] In some embodiments of this application, the optical lens 10 is a split lens. In a multi-group lens configuration, an active alignment process is used to compensate for manufacturing / assembly tolerances of optical system components, thereby improving the imaging quality and mass production yield of the entire optical system. During assembly, after finding the optimal imaging positions for two adjacent groups: the first lens component 11 and the second lens component 12, an adhesive 20 is used to reliably connect the first lens component 11 and the second lens component 12 together.

[0078] Specifically, in one embodiment of this application, firstly, a first lens 111 and a second lens component 12 are provided, wherein the second lens component 12 includes a second lens barrel 121 and at least one second lens 120 installed within the second lens barrel 121; then, the first lens 111, the second lens component 12, and the photosensitive component are pre-positioned such that the first lens 111, the at least one second optical lens, and the photosensitive component constitute an imaging system; then, active calibration is performed, that is, based on the imaging quality of the image acquired by the imaging system, the relative positional relationship between the first lens 111 and the second lens component 12 is adjusted in multiple dimensions. These multiple dimensions can be the three axes x, y, and z, and the three rotational directions Rx, Ry, and Rz, i.e., adjustment under 6-axis movement. Of course, the dimensions of active calibration can also be limited to some of the above 6 dimensions. For example, active calibration can be limited to positional adjustments in 3, 4, or 5 dimensions. The relative position between the first lens component 11 and the second lens component 12 is actively adjusted in real time. After one or more adjustments, the imaging quality (mainly including optical parameters such as peak value, field curvature, and astigmatism) of the optical lens 10 reaches the target value. Then, in response to the imaging quality of the image acquired by the imaging system meeting the preset requirements, the relative positional relationship between the first lens 111 and the second lens component 12 is fixed. Then, the first longitudinal extension portion 1122 of the first lens barrel 112 is installed on the support portion 1211 of the second lens barrel 121, so that the first lens barrel 112 is suspended and supported on the second lens barrel 121 and the first lens barrel 112 covers at least a portion of the side surface and the upper surface of the first lens 111.

[0079] In one embodiment of this application, during the assembly of the split lens, a first adhesive can be applied to the top surface of the second lens barrel 121. Then, the first lens 111 is moved above the second lens component to form an image-capable optical system. The relative positions of the first lens 111 and the second lens component are adjusted (i.e., actively calibrated) based on the actual imaging data output by the image sensor. After obtaining optimized image quality (i.e., after active calibration), the first adhesive can be pre-cured (or temporarily cured) by illumination (or other means). After pre-curing, the first adhesive can support the first lens 111 and the second lens component for a short period, maintaining their relative positions as determined by active calibration. Finally, the relatively fixed assembly of the first lens 111 and the second lens component can be baked to completely cure the first adhesive.

[0080] In another embodiment of this application, during the assembly of the split lens, active calibration can be performed first. After recording the relative position determined by the active calibration, the first lens 111 is removed, and then the first adhesive is applied to the top surface of the second lens barrel. The first lens 111 is then moved back to its original position (i.e., the recorded relative position determined by the active calibration). Next, the first adhesive is pre-cured (or temporarily cured) by light (or other means). After pre-curing, the first adhesive can support the first lens 111 and the second lens component for a short period, maintaining their relative position at the position determined by the active calibration. Finally, the relatively fixed assembly of the first lens 111 and the second lens component can be baked to completely cure the first adhesive.

[0081] Furthermore, in one embodiment of this application, after the first adhesive has fully cured (i.e., after the adhesive component 20 is formed), adhesive can be sprayed from the outside onto the outer surface of the first lens 111 and the gap between the second lens barrel 121 and the first lens 111, thereby forming a reinforcing adhesive layer 50 around the adhesive component 20. This reinforcing adhesive layer 50 can be cured solely by UV light irradiation, or it can be pre-cured by UV light irradiation followed by baking curing.

[0082] Furthermore, in some embodiments of this application, the number of first lenses in the first lens assembly can be one, that is, the group of first lens assemblies can have only one lens. In this case, the clamp (or other acquisition mechanism, such as a suction nozzle) grips a single lens and adjusts its relative position with the second lens assembly to achieve active calibration. After the first adhesive has pre-cured, the clamp can be released, and the pre-cured adhesive supports the first lens. Then, the lens is baked to completely cure the first adhesive, forming the adhesive component.

[0083] In other embodiments of this application, the first lens component has multiple first lenses, which are interlocked to form a first lens group, or are stacked using WLG wafer-level technology to form a first lens group. Since these first lenses are assembled into a first lens group, they can be directly gripped and moved by a fixture.

[0084] Furthermore, in some embodiments of this application, multiple second lenses are assembled into a second lens group via the second lens barrel. The inner surface of the second lens barrel may have a multi-step structure. When assembling the second lens group, the second lens barrel can be inverted, and then each second lens can be installed into the second lens barrel in order of increasing size. With the auxiliary support of the second lens barrel, the relative positions between the second lenses are fixed. Specifically, in one embodiment, the second lens component 12 includes a second lens 120 and a second lens barrel 121. The second lens 120 is accommodated and installed in the second lens barrel 121. The number of second lenses 120 is not limited to this application and may be 4, 5, 6, 7, or more. The second lens barrel 121 includes a second lateral extension portion 1212, which extends inward from the top of the second lens barrel 121, and at least a portion of the second lateral extension portion 1212 is located below the outer edge 1112 of the first lens component 11. The top of the lens barrel has an annularly distributed groove surrounding the side wall of the second lens barrel 121. This groove forms an annular support portion 1211 surrounding the side of the second lens barrel 121. The support portion 1211 is located outside the second laterally extended portion 1212, i.e., on the side away from the optical axis. The top surface of the support portion 1211 can be perpendicular or substantially perpendicular to the optical axis. Of course, in other embodiments of this application, the top surface of the support portion 1211 can also be inclined to the optical axis. In embodiments of this application, the annularly distributed support portion 1211 can be a single support portion 1211 annularly surrounding the side of the second lens barrel 121, or multiple support portions 1211 can be annularly spaced on the side of the second lens barrel 121. This application does not impose any limitations on this. In this application, the top surface of the support portion 1211 may be lower than the top surface of the second lens barrel 121, or the top surface of the support portion 1211 may be flush with the top surface of the second lens barrel 121, or the top surface of the support portion 1211 may be higher than the top surface of the second lens barrel 121. Preferably, the top surface of the support portion 1211 is lower than the top surface of the second lens barrel 121, that is, the height of the support portion 1211 is lower than the height of the upper surface of the second lens barrel 121. Therefore, when the first lens barrel 112 is disposed on the support portion 1211, the first lens barrel 112 can be suspended more closely to the upper surface of the first lens 111, thereby reducing the overall height of the optical lens 10.

[0085] In the above embodiment, the first lens component 11 and the second lens component 12 can be arranged sequentially along the optical axis, that is, the first lens component 11 is fixed to the light-incident side of the second lens component 12. Specifically, the first lens 111 of the first lens component 11 is fixed to the second lens barrel 121 of the second lens component 12, and the first lens barrel 112 of the first lens component 11 is fixed to the second lens barrel 121 of the second lens component 12. That is, the first lens 111 and the first lens barrel 112 are respectively fixedly connected to the second lens barrel 121, so that the first lens barrel 112 is suspended and supported above the first lens 111. There is no contact between the first lens barrel 112 and the first lens 111, that is, both the first lens barrel 112 and the first lens 111 are supported by the second lens barrel 121, but there is no supporting relationship between the first lens 111 and the first lens barrel 112.

[0086] Preferably, the outer edge 1112 of the first lens 111 is fixed to the second lateral extension 1212 of the second lens barrel 121, that is, the lower surface of the outer edge of the first lens 111 is fixed to the upper surface of the second lateral extension 1212 by an adhesive member 20. The first longitudinal extension 1122 of the first lens barrel 112 is fixed to the support 1211 of the second lens barrel 121. The first longitudinal extension 1122 can be regarded as a protrusion extending downward from the bottom of the first lens barrel 112, and the support 1211 can be regarded as a groove formed downward from the top of the second lens barrel 121. The first longitudinal extension 1122 of the first lens barrel 112 is fixed to the support 1211 of the second lens barrel 121 by the cooperation between the protrusion and the groove. In this embodiment, the first longitudinal extension portion 1122 of the first lens barrel 112 and the support portion 1211 of the second lens barrel 121 can be fixed together by an adhesive. The adhesive can be suitable for curing under ultraviolet light; or suitable for curing under visible light; or suitable for curing under heat; or suitable for curing under moisture contact. The selection of the adhesive is not limited to this application. Of course, those skilled in the art can also use threads or snaps to fix the first longitudinal extension portion and the support portion 1211 together, in addition to the adhesive, to further strengthen the connection between the first lens barrel 112 and the second lens barrel 121, thereby reducing the risk of the first lens barrel 112 detaching.

[0087] It should be understood that in some embodiments of this application, the support point of the first lens barrel 112 relies entirely on the support portion 1211 of the second lens barrel 121, while the first lens 111 does not provide a support point for the installation of the first lens barrel 112 because it is structurally independent of the first lens barrel 112.

[0088] Furthermore, according to some embodiments of this application, a camera module based on the above-described split optical lens is also provided as an example. (See reference...) Figure 1 and Figure 2 The camera module may include a photosensitive element 30 and the aforementioned split optical lens (i.e., optical lens 10). Further, Figure 14 A cross-sectional schematic diagram of a photosensitive component according to one embodiment of this application is shown. (Reference) Figure 14 The photosensitive assembly 30 may include a circuit board 31, a photosensitive chip 32, electronic components 33, a base 34, and a filter element 35. The photosensitive chip 32 is disposed on and electrically connected to the circuit board 31. The base 34 is disposed on the circuit board 31 and located around the photosensitive chip 32. The filter element 35 is mounted on the base 34 to be held in the photosensitive path of the photosensitive chip 32. The photosensitive chip 32 includes a photosensitive area 321 and a non-photosensitive area 322 surrounding the photosensitive area 321.

[0089] In one example of this application, the photosensitive chip 32 is mounted on the upper surface of the circuit board 31 and electrically connected to the circuit board 31 by gold wire bonding. Of course, in other exemplary embodiments of this application, the photosensitive chip 32 can also be disposed on the circuit board 31 and / or electrically connected to the circuit board 31 in other ways, for example, attached to the lower surface of the circuit board 31 in a flip-chip manner. This is not limited to this embodiment. It should be understood that in some embodiments of this application, the photosensitive path of the photosensitive chip 32 forms the photosensitive path of the photosensitive component 30.

[0090] In some embodiments of this application, the base 34 may be disposed on the circuit board 31 to encapsulate electronic devices located on the circuit board 31 and to support other components. In a specific example of this application, the base is implemented as a separately molded plastic bracket, which is attached to the surface of the circuit board 31 by an adhesive and is used to support other components. Of course, in other exemplary embodiments of this application, the base may also be formed on the circuit board 31 in other ways. For example, the base may be implemented as a molded base, which is integrally formed on a predetermined position of the circuit board 31 by a molding process. This is not limited to this embodiment and is not a limitation of this application.

[0091] In some embodiments of this application, the filter element 35 can be held on the light-sensitive path of the photosensitive chip 32 to filter the imaging light entering the photosensitive chip 32. In a specific example, the filter element 35 is mounted on the base 34 and corresponds to at least the light-sensitive area of ​​the photosensitive chip 32, thereby holding the filter element 35 on the light-sensitive path of the photosensitive chip 32. It is worth mentioning that in other exemplary embodiments of this application, the filter element 35 can also be mounted on the base 34 in other ways. For example, a filter element 35 support can be first provided on the base 34, and then the filter element 35 can be mounted on the filter element 35 support. That is, in this example, the filter element 35 can be indirectly mounted on the base 34 through other support members. Furthermore, in other example embodiments of this application, the filter element 35 can also be installed at other locations of the camera module 100, for example, the filter element 35 is formed inside the optical lens 10 (for example, as a filter film attached to the surface of an optical lens of the optical lens 10), which is not limited to this embodiment of the present application.

[0092] refer to Figure 2 In some embodiments of this application, the optical lens 10 is directly mounted on the top surface of the photosensitive component 30 to be fixedly positioned on the light-sensing path of the photosensitive component 30. In another example of this application, the optical lens 10 is mounted on the top surface of the photosensitive component 30 via a lens mount 13, the lens mount 13 having a through hole in the middle, through which light refracted by the optical lens 10 can enter the photosensitive component 30. In another example of this application, the optical lens 10 is mounted on the top surface of the photosensitive component 30 via a lens driving part 14 (i.e., an optical actuator), the optical lens 10 is disposed within the mounting space of the lens driving part 14, and the lens driving part 14 can drive the optical lens 10 to move to achieve optical focusing and / or optical image stabilization functions. In the embodiments of this application, the lens driving part 14 may be a voice coil lens driving part, a piezoelectric lens driving part, an SMA (shape memory alloy) lens driving part, or a similar type of driving lens driving part. The lens drive section 14 can drive the optical lens 10 to move in order to achieve optical focusing, optical zoom and / or optical image stabilization functions.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An optical lens characterized in that, include: A first lens component, which includes a first lens; The second lens component includes a second lens barrel and at least one second lens mounted inside the second lens barrel, and the first lens component and the second lens component are arranged coaxially. as well as An adhesive component is formed by curing a first adhesive, which is disposed between the second lens barrel and the first lens and supports the first lens and the second lens assembly after curing. Wherein, on the projection plane perpendicular to the optical axis of the optical lens, the adhesive component forms a ring with at least three notches; the central angle γ corresponding to each notch on the ring where the adhesive component is located is 10°~15°; A reinforcing adhesive layer is also provided between the first lens and the second lens component. The reinforcing adhesive layer is disposed on the periphery of the adhesive component, and the reinforcing adhesive layer has a second notch and is an open annular shape. In the adhesive application stage, the second adhesive is arranged in a closed ring shape. During heating and curing, the second notch is formed by the impact of expanding gas. The second notch is pointed and located at one of the notches of the adhesive component.

2. The optical lens according to claim 1, characterized in that, The adhesive component comprises multiple arc-shaped adhesive sections, any two of the arc-shaped adhesive sections are separated by the notch, and the central angle θ corresponding to any one of the arc-shaped adhesive sections on the ring is at least 75°.

3. The optical lens according to claim 1, characterized in that, The first lens includes an optically effective area and a structural area surrounding the optically effective area, and the adhesive bondes the bottom surface of the structural area of ​​the first lens to the top surface of the second lens barrel; The bottom surface of the first lens, the top surface of the second lens barrel, the top surface of the second lens closest to the object, and the adhesive form a first cavity, and the notch of the adhesive forms an escape channel that connects the first cavity with the outside gas.

4. The optical lens according to claim 3, characterized in that, After the first adhesive has fully cured, the notch is not filled or blocked to maintain the gas communication between the first cavity and the outside.

5. The optical lens according to claim 3, characterized in that, The first lens component further includes a first lens barrel, the first lens being located inside the first lens barrel, but the inner side of the first lens barrel and the outer surface of the first lens do not abut against each other; the first lens barrel includes a first sidewall and a first top cover extending laterally inward from the top of the first sidewall, with a light-transmitting hole formed in the center of the first top cover; the first sidewall is located outside the outer side of the outer surface of the structural area of ​​the first lens, the first top cover is located above the top surface of the structural area of ​​the first lens, and there is a gap of 5μm-10μm between the lower surface of the first top cover and the upper surface of the structural area of ​​the first lens; the bottom surface of the first sidewall of the first lens barrel is directly bonded to the second lens barrel with adhesive; a plurality of the second lenses are assembled into a second lens group through the second lens barrel.

6. The optical lens according to claim 2, characterized in that, The adhesive has four notches and four arc-shaped adhesive sections, and for any one of the arc-shaped adhesive sections, the corresponding central angle θ is 75°~80°.

7. The optical lens according to claim 2, characterized in that, The adhesive has three notches and three arc-shaped adhesive sections.

8. The optical lens according to any one of claims 1-6, characterized in that, The first lens is a glass lens, and the second lens barrel is a plastic lens barrel.

9. The optical lens according to any one of claims 1-6, characterized in that, The at least three notches are evenly distributed on the ring where the adhesive is located.

10. The optical lens according to claim 9, characterized in that, The reinforcing adhesive layer is made of an adhesive with an elastic modulus lower than that of the bonding component.

11. The optical lens according to claim 9, characterized in that, The first adhesive is applied to the top surface of the second lens barrel in a painted manner, and after being heated and cured, it forms the adhesive component; the reinforcing adhesive layer is arranged around the adhesive component from the outer side of the first lens.

12. The optical lens according to claim 11, characterized in that, The outer surface of the first lens is partially covered by the reinforcing adhesive layer.

13. The optical lens according to claim 11, characterized in that, The inlet size of the second notch is larger than its outlet size, wherein the inlet of the second notch is located on the side closer to the adhesive, and the outlet of the second notch is located on the side away from the adhesive.

14. The optical lens according to claim 11, characterized in that, The reinforcing adhesive layer is formed by a single continuous adhesive segment, and the reinforcing adhesive layer is provided with a single second notch, which is located in the same orientation as one of the notches of the adhesive component.

15. A camera module, characterized in that, include: A photosensitive component, which has a photosensitive chip; and The optical lens according to any one of claims 1-14; the optical lens is directly or indirectly mounted on the photosensitive component, such that the photosensitive chip is adapted to receive light passing through the first lens and the at least one second lens and output imaging data.

16. The camera module according to claim 15, characterized in that, It also includes an optical actuator, on which the optical lens is mounted and indirectly mounted to the photosensitive component.

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