WO2020034804A1

WO2020034804A1 - Optical lens assembly method and optical lenses assembled using same, and photographing module

Info

Publication number: WO2020034804A1
Application number: PCT/CN2019/096348
Authority: WO
Inventors: 蒋恒
Original assignee: 宁波舜宇光电信息有限公司
Priority date: 2018-08-13
Filing date: 2019-07-17
Publication date: 2020-02-20
Also published as: CN108717224B; CN108717224A

Abstract

Optical lenses (1000, 1100) and an assembly method thereof, and a photographing module comprising the optical lenses (1000, 1100) and an assembly method thereof. The assembly method of the optical lenses (1000, 1100) comprises: preparing a first lens unit (100) and a second lens unit (200), wherein the first lens unit (100) comprises at least one first lens element (102), and the second lens unit (200) comprises at least one second lens element (202); applying an adhesive material (400) to the second lens unit (200); imposing a time-delayed curing reaction trigger condition to the adhesive material (400); pre-positioning the first lens unit (100) and the second lens unit (200), such that the at least one first lens element (102) and the at least one second lens element (202) collectively form an imageable optical system; and performing active calibration to adjust a positional relationship between the first lens unit (100) and the second lens unit (200). The invention can mitigate a performance variation of an optical system caused by curing of an adhesive material (400). Curing of the adhesive material (400) and active calibration are performed in parallel to increase production efficiency. Moreover, the invention eliminates a heating operation, thereby mitigating degradation of optical performance.

Description

Optical lens assembly method, and optical lens and camera module assembled by the method

Cross-reference to related applications

This application requires China, which was submitted to the China National Intellectual Property Office (CNIPA) on August 13, 2018, with the application number 201810915455.4, and the invention name is "Optical lens assembly method and optical lens and camera module assembled using this method" The priority and rights of the invention patent application, the Chinese invention patent application is incorporated herein by reference in its entirety.

Technical field

The present application relates to the field of optical imaging technology, and more particularly, to a method for assembling an optical lens, and an optical lens and a camera module assembled by using the method.

Background technique

With the popularization of mobile electronic devices, the related technology of camera modules used in mobile electronic devices to help users obtain images (such as videos or images) has developed rapidly and progressed. In recent years, camera modules The group has been widely used in many fields such as medical, security, industrial production and so on.

In order to meet the growing market demand, high pixel, small size and large aperture are irreversible development trends of existing camera modules. At present, the market has increasingly demanded the imaging quality of camera modules. Factors affecting the resolution of a camera module with a given optical design include the quality of the optical imaging lens and manufacturing errors during the module packaging process.

Specifically, in the manufacturing process of the optical imaging lens, factors that affect the resolution of the lens come from errors of each element and its assembly, errors of the thickness of the lens spacer element, errors of the assembly fit of each lens, and changes in the refractive index of the lens material. Among them, the errors of each component and its assembly include errors such as the optical surface thickness of each lens element, the sagittal height of the optical surface of the lens, the optical surface shape, the radius of curvature, the eccentricity of the single surface of the lens and the deflection between the surfaces, and the tilt of the optical surface of the lens. The size depends on the precision of the mold and the ability to control the molding accuracy. The error of the thickness of the lens spacer element depends on the processing accuracy of the element. The assembling error of each lens depends on the dimensional tolerance of the components to be assembled and the accuracy of the lens assembly. The error introduced by the change in the refractive index of the lens material depends on the stability of the material and the batch consistency.

There is a phenomenon of cumulative deterioration of the errors affecting the resolution of each of the above components, and this cumulative error will increase with the number of lenses. Existing resolution solutions are to control the size of each relatively sensitive component and compensate for the rotation of the lens to improve the resolution. However, because the lens with high pixel and large aperture is more sensitive, strict tolerances are required, such as: 1μm for some sensitive lenses Lens eccentricity will bring the 9 ′ image plane tilt, which makes the processing and assembly of the lens more and more difficult. At the same time, due to the long feedback cycle in the assembly process, the process assembly index (CPK) of the lens assembly is low and the fluctuation is large, resulting in a defective rate high. And as mentioned above, because there are many factors affecting the resolution of the lens, which exist in multiple components, the control of each factor has the limit of manufacturing accuracy. If only the accuracy of each component is simply improved, the lifting capacity is limited, and the cost is high, And it can not meet the increasing demand for imaging quality in the market.

On the other hand, during the processing of the camera module, the assembly process of various structural components (such as the mounting of the sensor chip, the process of locking the motor lens, etc.) may cause the sensor chip to tilt. The resolution cannot reach the specified specifications, which leads to a low yield of the module factory. In recent years, module factories have compensated for the tilt of the photosensitive chip by using an Active Alignment process when assembling the imaging lens and the photosensitive module. However, this process has limited compensation capabilities. Because the various aberrations that affect the resolution come from the ability of the optical system (especially the optical imaging lens) itself, when the resolution of the optical imaging lens itself is insufficient, the existing active calibration process of the photosensitive module is difficult to compensate.

In order to overcome the above drawbacks, an active calibration process is currently proposed to adjust and determine the relative positions of the upper and lower sub-lenses, and then bond the upper and lower sub-lenses together according to the determined relative positions to manufacture a complete optical lens or Method for assembling camera module. This solution can improve the process capability index (CPK) of mass-produced optical lenses or camera modules; it can enable the evaluation of individual components of materials such as sub-lenses or photosensitive components used to assemble optical lenses or camera modules The requirements for precision and assembly accuracy have been loosened, thereby reducing the overall cost of the optical imaging lens and camera module; it can correct various aberrations of the camera module in real time during assembly, reducing the defect rate, reducing production costs, and improving Imaging quality.

Because the above technology first adjusts and determines the relative position of the upper and lower sub-lenses based on the active calibration process, and then uses the corresponding glue to bond the upper and lower sub-lenses together according to the determined relative position, which can lead to the curing process of the glue. The variability of optical system performance brought in. Specifically, during the curing and deformation process of the rubber material, the rubber material forms an acting force on the lens barrel, and the acting force will cause an undesired deformation of the lens barrel, thereby causing a change in the position of the lens installed in the lens barrel. The thicker the glue, the greater the above-mentioned undesired deformation. This results in a deviation between the actual lens position of the optical system and the lens position of the optical system determined by active calibration after the glue is completely cured, which in turn causes the imaging quality to fall short of expectations. In addition, since the curing process of the glue material needs to be baked, the optical performance loss caused by the baking may be caused. At the same time, because the active calibration process and the glue curing process are separate processes, it also causes the problem of low production efficiency.

Summary of the Invention

The present application aims to provide a solution capable of overcoming at least one drawback of the prior art.

According to an aspect of the present application, there is provided a method for assembling an optical lens, the method comprising: preparing a first lens component and a second lens component, wherein the first lens component includes at least one first lens, and the first lens component The two lens components include at least one second lens; an adhesive material is disposed on the second lens component; a time delay curing reaction trigger condition is applied to the adhesive material; the first lens component and the second lens are pre-positioned Components so that the at least one first lens and the at least one second lens together form an imageable optical system; and adjust the positional relationship between the first lens component and the second lens component through active calibration.

In one embodiment, the second lens component further includes a second lens barrel, the at least one second lens is located in the second lens barrel, and the disposing of the adhesive material to the second lens component is The rubber material is arranged on the second lens barrel or the at least one second lens.

In one embodiment, the complete curing process of the glue material includes a low-curing reaction stage and a normal curing reaction stage; the active calibration further includes: performing all the steps in the low-curing reaction stage and / or the normal curing reaction stage. Said active calibration.

In one embodiment, the delayed curing reaction triggering condition is applied after the glue is laid out and before the active calibration is completed.

In one embodiment, the triggering condition of the delayed curing reaction is light, heat, oxygen, or moisture.

In one embodiment, when the triggering condition of the delayed curing reaction is light, applying the triggering condition of the delayed curing reaction includes: irradiating light at any time point after the glue is laid and before the active calibration is completed. .

In one embodiment, when the triggering condition of the delayed curing reaction is moisture, applying the triggering condition of the delayed curing reaction includes: continuously applying moisture.

In one embodiment, the glue material is a hot-melt glue, a UV time-lapse curing glue, or other glue materials having a time-lapse curing function.

In one embodiment, the active calibration includes: adjusting and moving the first lens component to adjust and determine a relative position of the first lens component and the second lens component.

In one embodiment, the active calibration further includes: adjusting and determining an included angle of an axis of the first lens component with respect to an axis of the second lens component according to a measured resolution of the optical system.

In one embodiment, the active calibration further includes: moving the first lens component along a plane, and determining a distance between the first lens component and the second lens component according to a measured resolution of the optical system. Relative position in the direction of movement along the plane; movement along the plane includes translation and / or rotation on the plane.

In one embodiment, the active calibration further includes: moving the first lens along a direction perpendicular to the plane, and determining the first lens component and the second lens according to a measured resolution of the optical system. The relative position between the lens components in a moving direction perpendicular to the plane.

According to another aspect of the present application, a method for assembling a camera module is also provided. The method includes assembling an optical lens by using the optical lens assembly method in any of the foregoing embodiments, and then using the assembled optical lens to make a camera module. .

According to still another invention of the present application, there is also provided an optical lens including: a first lens component including at least one first lens; a second lens component including at least one second lens; and at least one first lens Together with the at least one second lens, an imageable optical system is formed; and an adhesive material, which bonds the first lens component and the second lens component together, and the adhesive material is interposed between the first lens component and the second lens component. In a gap between a lens component and the second lens component, the glue material has a time-lapse curing property.

In one embodiment, an included angle between the axis of the first lens component and the axis of the second lens component is not zero.

In one embodiment, the glue is adapted to support and fix the first lens component and the second lens component, and keep the first lens component and the second lens component in a certain relative position at all times. position.

In an embodiment, the glue material is a glue material that does not immediately start a curing reaction or starts to slowly cure after being triggered by a delayed curing reaction triggering condition.

In one embodiment, the delayed curing reaction triggering condition acts on light, heat, oxygen, or moisture.

In one embodiment, the gap has an opening facing the outside of the optical lens, and a size of the opening in a direction along the optical axis is larger than an average size of the gap.

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

In one embodiment, the second lens component further includes a second lens barrel, the second lens is located in the second lens barrel, and the glue is interposed between the first lens component and the second lens barrel. In the gap between the lens parts.

In one embodiment, between the first lens component and the second lens component is between the first lens and the second lens barrel or between the first lens and the second lens. between.

In one embodiment, when the space between the first lens component and the second lens component is between the first lens and the second lens barrel, the non-optical surface of the first lens Has a roughened surface.

In one embodiment, when the first lens component and the second lens component are between the first lens and the second lens, the first lens and the second lens The non-optical surfaces of the lenses each have a roughened surface.

In one embodiment, the first lens component further includes a first lens barrel, and the at least one first lens is mounted in the first lens barrel.

In one embodiment, between the first lens component and the second lens component is between the first lens barrel and the second lens barrel.

In one embodiment, between the first lens component and the second lens component is between a bottom surface of the first lens component and a top surface of the second lens component.

According to still another aspect of the present application, a camera module is further provided, including: the optical lens in any of the foregoing embodiments.

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

1. This application can to some extent correct the optical system performance variation caused by the curing of the adhesive that cannot be corrected by the existing AOA process.

2. This application can simultaneously perform the curing process of the glue and the active calibration process, thereby improving production efficiency.

3. This application does not need to bake the glue after the active calibration is completed, so that the loss of optical performance caused by baking is no longer generated.

4. This application can improve the stability of the optical system and the imaging quality of the camera module.

5. This application helps to improve the yield of optical lenses or camera modules based on active calibration.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments are shown in reference drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive.

FIG. 1 shows a flowchart of a lens assembly method in a comparative example;

2 is a flowchart illustrating an optical lens assembly method according to an exemplary embodiment of the present application;

FIG. 3a illustrates a relative position adjustment method in active calibration according to an embodiment of the present application; FIG.

Fig. 3b shows a rotation adjustment in active calibration according to another embodiment of the present application;

3c shows a relative position adjustment method in which v and w direction adjustments are added in active calibration according to still another embodiment of the present application;

4 is a schematic cross-sectional view illustrating an optical lens according to an embodiment of the present application;

FIG. 5 is a partially enlarged cross-sectional schematic view showing a bonding region of a first lens component and a second lens component according to an embodiment of the present application; and

FIG. 6 is a schematic cross-sectional view illustrating an optical lens according to another embodiment of the present application.

detailed description

In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the description, 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.

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

In the drawings, for convenience of explanation, the thickness, size, and shape of the object have been slightly exaggerated. The drawings are only examples and are not drawn to scale.

It should also be understood that the terms "including", "including", "having", "including" and / or "including" when used in this specification indicate the existence of stated features, wholes, steps, operations , Elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. Furthermore, when an expression such as "at least one of" appears after the list of listed features, the entire listed feature is modified, rather than the individual elements in the list. In addition, when describing an embodiment of the present application, "may" is used to mean "one or more embodiments of the present application." Also, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially", "approximately" and similar terms are used as table approximation terms, not as table level terms, and are intended to illustrate measurement, which will be recognized by those of ordinary skill in the art. The inherent deviation in the value or calculated value.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Unless explicitly so defined herein, terms (such as those defined in commonly used dictionaries) should be interpreted to have a meaning consistent with their meaning in the context of the relevant field, and will not be idealized or over-formalized Meaning.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The application will be described in detail below with reference to the drawings and embodiments.

FIG. 1 shows a flowchart of a lens assembly method in a comparative example, in which an active calibration process and a glue curing process are independently performed in series. Referring to FIG. 1, the process S100 includes:

Step S110, preparing a first lens component and a second lens component, wherein the first lens component includes at least one first lens, and when the number of the first lenses is plural, the first lenses are maintained to fit into each other by fitting with each other. The relative position of the second lens component is fixed, and the second lens component includes at least one second lens, and when the number of the second lenses is plural, these second lenses are fixed to each other by fitting with each other.

In step S120, the adhesive material is disposed on the second lens component.

In step S130, the first lens component and the second lens component are pre-positioned so that at least one second lens and at least one first lens together form an imageable optical system.

Step S140: Adjust and determine the relative positions of the first lens component and the second lens component based on the active calibration.

In step S150, the first lens component and the second lens component are bonded by an adhesive material, so that the relative positions of the first lens component and the second lens component are maintained at the relative positions determined through active calibration.

Those skilled in the art will understand that the sequence in the above method can be changed to S110 → S130 → S140 → S120 → S150, that is, the adhesive material can be arranged after the active calibration process. However, it should be understood that the steps in the prior art lens assembly method are serial, that is, the pre-positioning, the active calibration process, and the glue curing process cannot be performed simultaneously.

However, during the curing and deformation process of the glue, the glue will exert a force on the lens barrel, which will cause an undesired deformation of the lens barrel, which in turn will cause a change in the position of the lens installed in the lens barrel, which will cause the glue to change. After the material is completely cured, the actual lens position of the optical system deviates from the lens position of the optical system determined by active calibration, which causes the imaging quality to fall short of expectations. In addition, since the curing process of the glue material needs to be baked, the optical performance loss caused by the baking may be caused. At the same time, because the active calibration process and the glue curing process are separate processes, it also causes the problem of low production efficiency.

FIG. 2 shows a flowchart of an optical lens assembly method according to an exemplary embodiment of the present application. Referring to FIG. 2, the process S200 includes:

Step S210, preparing a first lens component and a second lens component, wherein the first lens component includes at least one first lens, and when the number of the first lenses is plural, these first lenses are kept fitted to each other to maintain each other. The relative position between them is fixed, and the second lens component includes at least one second lens, and when the number of the second lenses is plural, these second lenses are fixed to each other by fitting with each other. Further, the second lens component may further include a second lens barrel, and at least one second lens is located in the second lens barrel.

Step S220, arranging the adhesive material on the second lens component, wherein, as required, the adhesive material may be disposed on the second lens barrel of the second lens component, or at least one second of the second lens component. On the lens.

In step S230, the first lens component and the second lens component are pre-positioned so that at least one second lens and at least one first lens together form an imageable optical system.

Step S240: Adjust the positional relationship between the first lens component and the second lens component through active calibration.

Step S250 applies a delay curing reaction triggering condition, wherein step S250 can be performed in parallel with steps S230 and S240, that is, a delay curing reaction triggering condition can be applied at any time point in steps S230 and S240. In addition, the delayed curing reaction trigger condition can be continuously applied throughout the optical lens assembly process.

Finally, in optional step S260, waiting for the plastic material to be cured to obtain an optical lens.

Further, in one embodiment, the glue material used in step S220 is a glue material having a property of delayed curing. After the adhesive material with delayed curing property is subjected to curing triggering conditions (light, heat, oxygen, moisture, etc.), the adhesive material begins to cure slowly (the curing rate is lower at the beginning and the curing speed increases after a period of time). Therefore, in the exemplary embodiment according to the present application, the complete curing process of the glue material having a time-delay property includes a low curing reaction stage and a normal curing reaction stage. That is, in the low curing reaction stage, the glue material undergoes a slow curing reaction (or the curing reaction rate is low), and in the normal curing reaction stage, the glue material undergoes a normal curing reaction (or has a normal curing reaction rate). In addition, the time to achieve full curing of the glue with time-lapse curing properties can be designed according to the time used for active calibration, so that the glue is not completely cured before the active calibration is completed, so that the first lens component and the second lens component can be adjusted Relative position. That is, by using a glue material having a time-lapse curing property, an active calibration process can be performed during the low curing reaction phase and / or the normal curing reaction phase of the glue material. At this time, the optical performance loss caused by the glue curing can be reduced. Compensation is performed during the active calibration process to correct the optical system performance variation caused by the curing of the adhesive that cannot be corrected by the existing AOA process to a certain extent. However, the complete curing time should not be too long, as this will reduce production efficiency. That is, the curing time of the glue material with delayed curing property is slightly longer than the time of pre-positioning and active calibration.

In an exemplary embodiment according to the present application, the adhesive material having the property of delayed curing may be a hot-melt adhesive. Here, the present application will be described using hot melt adhesives as an example. The hot melt adhesive according to an exemplary embodiment of the present application is a reactive hot melt adhesive, which introduces a reactive macromolecular group into a thermoplastic macromolecule by activating The group reaction cross-links and solidifies to form a three-dimensional structure, thereby forming a thermosetting resin, thereby improving the characteristics of adhesion strength, heat resistance, solvent resistance, chemical resistance, and creep resistance. In this embodiment, the triggering conditions for the delayed curing reaction are at least one of heat, oxygen, radiation (UV, electron beam, etc.) and moisture, but the present application is not limited thereto, and other suitable triggering conditions for the delayed curing reaction are all Applicable to this application. In this embodiment, moisture is used as a reaction triggering condition for detailed description. Specifically, first, the reactive hot-melt adhesive is melted at a high temperature, and is placed on a second lens component after being changed into a liquid state. The adhesive material is affected by moisture and begins to solidify. In the low-curing reaction stage and / or normal curing reaction At this stage, the relative position between the first lens component and the second lens component can be actively calibrated, so as to improve the degradation of the optical performance caused during the curing of the glue. At the same time, because the hot-melt adhesive no longer needs to be baked for further curing (adhesion strength is sufficient), compared with UV thermosetting adhesives, the optical performance variation caused by baking is reduced. In addition, the use of hot-melt adhesive allows the curing process of the glue to be performed in parallel with the pre-positioning and active calibration process without having to perform the active calibration process and the curing process in order, thereby improving production efficiency.

In addition to the hot-melt adhesive, the adhesive material used in the present application may be a UV delayed-curing adhesive or other adhesive material having a delayed-curing property.

Further, when the triggering condition of the delayed curing reaction applied is moisture, after the glue is laid, the moisture in the air is always present, so the glue is slowly cured from the beginning. That is, the delayed curing reaction triggering condition is continuously applied.

Further, when the triggering condition of the delayed curing reaction is light, the light can be irradiated at any point after the glue is laid and before the active calibration is completed. Specifically, when the glue used is a UV time-lapse curing glue, the UV time-lapse curing glue needs to be irradiated with UV light to trigger curing. That is, by irradiating UV light at any time after the glue is laid and before the end of the active calibration, the UV time-lapse curing adhesive starts to cure slowly, but only needs to be irradiated with UV light once compared to the example where the curing trigger condition is moisture. No continuous irradiation is required. However, those skilled in the art will understand that the present application is not limited to this, and without departing from the spirit and scope of the application, UV light may be continuously irradiated or UV light may be irradiated multiple times as required. In addition, those skilled in the art will understand that light is not limited to UV light. When using other types of time-lapse glue, as long as it can trigger the curing reaction of the glue, such as visible light or other types of light can be used as the time-lapse curing reaction trigger. condition.

Further, the active calibration described in this application can adjust the relative positions of the first lens component and the second lens component in multiple degrees of freedom. Active calibration refers to controlling the adjustment of one lens component relative to another lens component to adjust the entire optical system according to the measured resolution of the optical system, so that the axis of each lens component is adjusted uniformly, so that the measured resolution of the optical system reaches the standard. The axis of the lens component refers to the optical axis of the optical system composed of all the lenses in the lens component.

FIG. 3a illustrates a relative position adjustment method in active calibration according to an embodiment of the present application. In this adjustment mode, the first lens component (also a first lens) can be moved in the x, y, and z directions relative to the second lens component (that is, the relative position adjustment in this embodiment has three Degrees of freedom). The z direction is a direction along the optical axis, and the x and y directions are directions perpendicular to the optical axis. Both the x and y directions are 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.

Fig. 3b shows a rotation adjustment in active calibration according to another embodiment of the present application. In this embodiment, in addition to the three degrees of freedom of Fig. 3a, the relative position adjustment also increases the degree of freedom of rotation, that is, the adjustment in the r direction. In this embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, that is, a rotation about an axis perpendicular to the adjustment plane P.

Further, FIG. 3c illustrates a relative position adjustment method in which v and w direction adjustments are added in active calibration according to still another embodiment of the present application. Among them, 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 combined into a vector angle, and this vector angle represents the total tilt state. That is, by adjusting the v direction and the w direction, the tilt attitude of the first lens component relative to the second lens component (that is, the optical axis of the first lens component relative to the optical axis of the second lens component can be adjusted. The tilt). Therefore, after active calibration, the included angle between the axis of the first lens component and the second lens component may not be zero.

The above-mentioned adjustments of the six degrees of freedom of x, y, z, r, v, and w may all affect the imaging quality of the optical system (for example, affect the resolution). In other embodiments of the present application, the relative position adjustment method may be to adjust only any one of the above six degrees of freedom, or a combination of any two or more of them.

Further, according to an embodiment of the present application, a method for assembling a camera module is also provided. The method includes: assembling an optical lens by using the optical lens assembly method in any of the foregoing embodiments, and then using the assembled optical lens. Make a camera module.

FIG. 4 is a schematic cross-sectional view of an optical lens 1000 according to an embodiment of the present application. The optical lens 1000 includes a first lens component 100, a second lens component 200, and an adhesive material 400 that bonds the first lens component 100 and the second lens component 200 together. The first lens component 100 includes a first lens 102, and the second lens component 200 includes a second lens barrel 201 and five second lenses 202. However, the number of the second lenses 202 is not specifically limited, and may be determined according to specific requirements. Choose, the glue has time-delay curing properties. For example, the adhesive material 400 may be an adhesive material that does not immediately start a curing reaction after being triggered by a delayed curing reaction triggering condition, such as at least one of hot melt adhesive, UV delayed curing adhesive, or other adhesive materials with a delayed function Species. In addition, the glue 400 is suitable for supporting and fixing the first lens component 100 and the second lens component 200, and keeping the first lens component 100 and the second lens component 200 at the relative positions determined by the active calibration at all times. In this embodiment, the first lens 102 is directly bonded to the second lens barrel 201 through the adhesive material 400. However, those skilled in the art will understand that the specific bonding position between the first lens component 100 and the second lens component 200 is not limited without departing from the spirit and concept of the present application, for example, the first lens 102 It can also be directly bonded to the second lens closest to the first lens 102 in the second lens 202 through the glue 400. Further, the second lens component 200 may not include the second lens barrel 201, that is, the second lens component 200 includes only five second lenses 202.

FIG. 5 shows a partially enlarged cross-sectional view of an adhesive region of the first lens component 100 and the second lens component 200 according to an embodiment of the present application. Referring to FIG. 5, in the present embodiment, there is a gap between the first lens member 100 and the second lens member 200. Specifically, the gap may be located between an end surface (non-optical surface) of the non-optical region of the first lens 102 and the second lens barrel 201. The surface of the non-optical surface of the first lens 102 may be roughened to increase its roughness, thereby increasing the adhesion between the second rubber material and the surface of the non-optical surface. It should be understood that the gap may also be located between the end surface (non-optical surface) of the non-optical region of the first lens 102 and the second lens closest to the first lens 102 in the second lens 202. At this time, the surfaces of the non-optical surface of the first lens 102 and the second lens 202 of the first lens 102 may be roughened to increase the degree of roughness, thereby increasing the adhesive force.

When assembling the first lens component 100 and the second lens component 200, an adhesive material with a time-delay property may be laid on the second lens component 200 first. Then, a delayed curing reaction trigger condition is applied. Next, the first lens component 100 and the second lens component 200 are pre-positioned, and then the relative positions of the first and

second lens components

100 and 200 are adjusted so that when the glue is cured, the active calibration is completed accordingly. process. It should be noted that the process of applying the triggering condition of the delayed curing reaction may be performed in parallel with the pre-positioning process and the active calibration process. That is, the triggering condition of the delayed curing reaction can be applied at any time after the glue is laid and before the active calibration is completed. Further, as described above, according to the type of the delayed curing reaction triggering condition applied, it can be determined whether the delayed curing reaction triggering condition is continuously applied or the delayed curing reaction triggering condition is applied one or more times. Therefore, the active calibration process can be completed at the same time during the curing process of the glue, which can improve the variation of the optical performance brought about during the curing of the glue. In addition, since the adhesive material used in the present application has sufficient adhesive strength, there is no need to bake it for further curing after the curing process is finished, which reduces the variation in optical properties caused by baking compared to other adhesive materials. At the same time, the use of glue with a time-delay property allows the glue curing process and the active calibration process to be performed at the same time, which allows the two steps to be performed in parallel, thereby improving production efficiency. Finally, the entire camera module or optical lens is fixed.

Further, still referring to FIG. 5, in one embodiment, the second lens barrel 201 may be chamfered so that the gap forms an opening 401a facing the outside. The chamfer is used to guide the glue that may overflow and prevent the first lens component. The optical surface of the lens in 100 is stained with glue, and the size of the opening 401a in the direction along the optical axis is larger than the average size of the gap. In addition, those skilled in the art will understand that the second lens barrel 201 may also be chamfered so that the gap forms an opening 401b facing the optical axis of the optical lens, so as to clear the glue that may overflow and prevent the lens from being polluted by the glue. Similarly, the size of the opening 401b in the direction along the optical axis is larger than the average size of the gap.

FIG. 6 is a schematic cross-sectional view of an optical lens 1100 according to another embodiment of the present application. Referring to FIG. 6, the optical lens 1100 of FIG. 6 is different from the optical lens 1000 of FIG. 4 in that the first lens component 100 further includes a first lens barrel 101. Therefore, in the following, description of the same portion of the optical lens 1100 as that of the optical lens 1000 will be omitted.

In FIG. 6, the first lens component 100 further includes a first lens barrel 101, wherein the first lens 102 is installed in the first lens barrel 101 through an adhesive material. Different from the optical lens 1000 in FIG. 4, in this embodiment, the bonding method between the first lens member 100 and the second lens member 200 is that the first lens barrel 101 and the second lens barrel 201 are bonded by an adhesive 400. . Further, the bonding manner between the first lens component 100 and the second lens component 200 is that the bottom surface 101 a of the first lens component 100 and the top surface 201 a of the second lens component 200 are bonded by an adhesive material 400.

In the above embodiment, the first lens 102 is closer to the front end of the optical lens than the second lens 202 (the front end of the optical lens refers to the light incident end, and the rear end refers to the end near the photosensitive component).

Further, according to an embodiment of the present application, a camera module is further provided. The camera module includes the optical lens in any of the foregoing embodiments.

In the above embodiments, the number of lenses of the first lens component and the second lens component can be adjusted as needed. For example, the number of lenses of the first lens component and the second lens component may be two and four, three and three, four and two, and five and one, respectively. The total number of lenses of the entire optical lens can also be adjusted as required. For example, the total number of lenses of the optical lens can be six, or five or seven. In particular, in a preferred embodiment, when the first lens component has a plurality of first lenses, the first lenses are fitted to each other to keep the relative positions of the first lenses fixed. In other words, the plurality of first lenses of the first lens component do not need the first lens barrel to provide a supporting function, and can keep the structure of the optical system of the first lens component stable. In addition, when the first lens component and the second lens component are bonded by an adhesive material, the first lens in each of the embodiments described above (these are only a single first lens) consists of a plurality of first lenses One lens in a lens closest to the second lens component may be substituted. That is, the shape and structure of the first lens in FIG. 4-5 can be used for a first lens closest to a second lens component among a plurality of first lenses that are fitted to each other, thereby achieving similar functions.

In the above-described embodiment, as an example, the optical lens is described as including the first lens member and the second lens member. However, the number of lens components in an optical lens is not particularly limited, that is, the number of lens components is not limited to two, and the number of lens components may be three, four, etc. according to specific design needs.

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

Claims

An optical lens assembly method, comprising:

Preparing a first lens component and a second lens component, wherein the first lens component includes at least one first lens and the second lens component includes at least one second lens;

Placing an adhesive material on the second lens component;

Applying a triggering condition for the delayed curing reaction to the glue material;

Pre-positioning the first lens component and the second lens component such that the at least one first lens and the at least one second lens together constitute an imageable optical system; and

The positional relationship between the first lens component and the second lens component is adjusted by active calibration.
The method for assembling an optical lens according to claim 1, wherein the second lens component further comprises a second lens barrel, the at least one second lens is located in the second lens barrel, and the plastic material is The second lens component is arranged on the second lens barrel or the at least one second lens.
The method for assembling an optical lens according to claim 1, wherein the complete curing process of the glue material includes a low curing reaction stage and a normal curing reaction stage;

The active calibration further includes: performing the active calibration in the low curing reaction stage and / or the normal curing reaction stage.
The method for assembling an optical lens according to claim 1, wherein the delayed curing reaction triggering condition is applied after the glue material is laid out and before the active calibration is completed.
The method for assembling an optical lens according to claim 4, wherein a triggering condition of the delayed curing reaction is light, heat, oxygen, or moisture.
The method for assembling an optical lens according to claim 5, wherein when the triggering condition of the delayed curing reaction is light, applying the triggering condition of the delayed curing reaction comprises: after the glue is laid to completion. The light is irradiated at any time before the active calibration.
The method for assembling an optical lens according to claim 5, wherein when the triggering condition of the delayed curing reaction is moisture, applying the triggering condition of the delayed curing reaction comprises: continuously applying moisture.
The method for assembling an optical lens according to claim 3, wherein the glue material is a hot-melt glue, a UV time-lapse curing glue, or other glue material having a time-lapse curing function.
The method for assembling an optical lens according to claim 1, wherein the active calibration comprises: adjusting and moving the first lens component to adjust and determine the relative of the first lens component to the second lens component position.
The method for assembling an optical lens according to claim 9, wherein the active calibration further comprises: adjusting and determining an axis of the first lens component with respect to the second lens according to a measured resolution of the optical system. The angle of the axis of the component.
The method for assembling an optical lens according to claim 9, wherein the active calibration further comprises: moving the first lens component along a plane, and determining the first lens component according to a measured resolution of the optical system. Relative position with the second lens member in a moving direction along the plane; movement along the plane includes translation and / or rotation on the plane.
The method for assembling an optical lens according to claim 9, wherein the active calibration further comprises: moving the first lens component in a direction perpendicular to the plane, and determining according to a measured resolution of the optical system. A relative position between the first lens member and the second lens member in a moving direction perpendicular to the plane.
A method for assembling a camera module, comprising:

Assembling an optical lens using the optical lens assembling method according to any one of claims 1-12; and

Use the assembled optical lens to make a camera module.
An optical lens, comprising:

A first lens component including at least one first lens;

A second lens component including at least one second lens, and the at least one first lens and the at least one second lens together form an imageable optical system; and

An adhesive material that bonds the first lens component and the second lens component together, and the adhesive material is interposed in a gap between the first lens component and the second lens component,

Wherein, the glue material has the property of delayed curing.
The optical lens according to claim 14, wherein an angle between an axis of the first lens component and an axis of the second lens component is not zero.
The optical lens according to claim 14, wherein the glue material is adapted to support and fix the first lens component and the second lens component, and make the first lens component and the second lens component The lens components are held in a determined relative position.
The optical lens according to claim 14, wherein the glue material is a glue material that does not immediately start a curing reaction or starts to slowly cure after being subjected to the triggering condition of the delayed curing reaction.
The optical lens according to claim 17, wherein the triggering condition of the delayed curing reaction is light, heat, oxygen, or moisture.
The optical lens according to claim 17, wherein the glue material is a hot-melt glue, a UV time-lapse curing glue, or other glue material having a time-lapse curing function.
The optical lens according to claim 14, wherein the gap has an opening facing the outside of the optical lens, and a size of the opening in a direction along the optical axis is larger than an average size of the gap .
The optical lens according to claim 14, wherein the first lens is closer to a front end of the optical lens than the second lens.
The optical lens according to claim 14, wherein the second lens component further comprises a second lens barrel, the second lens is located in the second lens barrel, and the glue is interposed between the first lens barrel and the second lens barrel. In a gap between a lens component and the second lens component.
The optical lens according to claim 22, wherein between the first lens component and the second lens component is between the first lens and the second lens barrel or the first lens component Between the lens and the second lens.
The optical lens according to claim 23, wherein when the space between the first lens component and the second lens component is between the first lens and the second lens barrel, all The non-optical surface of the first lens has a roughened surface.
The optical lens according to claim 23, wherein when the distance between the first lens component and the second lens component is between the first lens and the second lens, the The non-optical surfaces of the first lens and the second lens each have a roughened surface.
The optical lens according to claim 14, wherein the first lens component further comprises a first lens barrel, and the at least one first lens is mounted in the first lens barrel.
The optical lens according to claim 26, wherein between the first lens member and the second lens member is between the first lens barrel and the second lens barrel.
The optical lens according to claim 26, wherein between the first lens member and the second lens member is between a bottom surface of the first lens member and a top surface of the second lens member .
A camera module, comprising the optical lens according to any one of claims 14-28.