阅读说明：本技术 光学镜头及组装光学镜头的方法和系统 (Optical lens and method and system for assembling optical lens ) 是由 向恩来 郑程倡 周凯伦 于 2018-08-30 设计创作，主要内容包括：本申请提供了一种光学镜头,包括：第一镜头部件,其包括至少一个第一镜片；第二镜头部件,其与第一镜头部件之间具有高度不等的间隙并包括第二镜筒和安装在第二镜筒内的至少一个第二镜片,并且至少一个第二镜片与至少一个第一镜片共同构成可成像的光学系统；以及胶材,其设置在第一镜头部件和第二镜头部件之间的间隙的至少一部分的粘结区域中,并将第一镜头部件和第二镜头部件粘结在一起,其中,粘结区域的每一位置处的胶材的体积与粘结区域的该位置处的间隙的高度正相关。本申请提高了光学镜头品质的整体可靠性。(The application provides an optical lens, includes: a first lens component comprising at least one first lens; the second lens part is provided with a gap with different heights with the first lens part and comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the at least one second lens and the at least one first lens form an imaging optical system together; and a glue material disposed in a bonding area of at least a portion of a gap between the first lens part and the second lens part and bonding the first lens part and the second lens part together, wherein a volume of the glue material at each position of the bonding area is positively correlated with a height of the gap at the position of the bonding area. The application improves the overall reliability of the quality of the optical lens.)

1. An optical lens, comprising:

a first lens component comprising at least one first lens;

the second lens component has a gap with different heights with the first lens component and comprises a second lens barrel and at least one second lens installed in the second lens barrel, and the at least one second lens and the at least one first lens jointly form an imageable optical system; and

a glue material disposed in a bonding area of at least a portion of a gap between the first lens component and the second lens component and bonding the first lens component and the second lens component together,

wherein the volume of the glue material at each position of the bonding area is positively correlated with the height of the gap at the position of the bonding area.

2. An optical lens according to claim 1, characterized in that the volume of glue at each location of the bonding area is linearly related to the height of the gap at that location of the bonding area.

3. An optical lens according to claim 1, characterized in that the bonding area comprises:

a portion of a gap between the first lens component and the second lens component in a closed loop shape; or

A portion other than a gap having a maximum height among a portion of a gap between the first lens member and the second lens member in a closed ring shape; or

A portion other than the gap having the smallest height among a portion of the gap between the first lens member and the second lens member in a closed ring shape.

4. An optical lens according to any one of claims 1 to 3, characterized in that the glue at each position of the adhesive area is the same as the adhesive area of the second lens component.

5. An optical lens according to any of claims 1 to 3, characterized in that the first lens part comprises a first lens, the glue being provided in a bonding area of at least a part of a gap between the first lens and the second lens barrel.

6. An optical lens according to any of claims 1 to 3, characterized in that the first lens part further comprises a first barrel, the at least one first lens being mounted within the first barrel,

wherein the adhesive material is disposed in a bonding area of at least a portion of a gap between the first barrel and the second barrel.

7. An optical lens according to any of claims 1 to 3, characterized in that the glue comprises a glue cured by light, heat, moisture, anaerobic or oxidative curing.

8. A camera module comprising the optical lens of any one of claims 1-7.

9. A method of assembling an optical lens, comprising:

preparing a first lens part and a second lens part, wherein the first lens part comprises at least one first lens, and the second lens part comprises a second lens barrel and at least one second lens mounted in the second lens barrel;

pre-positioning the first lens part and the second lens part to enable the at least one second lens and the at least one first lens to jointly form an imaging optical system;

adjusting relative positions of the first lens component and the second lens component based on active calibration, wherein the first lens component and the second lens component have gaps of unequal heights therebetween;

acquiring a relative inclination angle between the bonding surface of the first lens component and the bonding surface of the second lens component; and

disposing a glue material on the second lens component based on a result of the active calibration and the relative tilt angle so as to be disposed in a bonding region of at least a portion of a gap between the first lens component and the second lens component,

wherein the glue is arranged such that the volume of glue at each position of the bonding area is positively correlated with the height of the gap at that position of the bonding area.

10. The method of claim 9, wherein obtaining a relative tilt angle between the adhesive surface of the first lens component and the adhesive surface of the second lens component comprises:

calculating the result of the active calibration to obtain a relative inclination angle between the bonding surface of the first lens component and the bonding surface of the second lens component; or

And measuring the bonding surface of the first lens component and the bonding surface of the second lens component through a laser height measuring mechanism, and calculating the measurement result to obtain the relative inclination angle between the bonding surfaces of the first lens component and the second lens component.

11. The method of claim 9, wherein the bonding region is configured to include:

a portion of a gap between the first lens component and the second lens component in a closed loop shape; or

A portion other than a gap having a maximum height among a portion of a gap between the first lens member and the second lens member in a closed ring shape; or

A portion other than the gap having the smallest height among a portion of the gap between the first lens member and the second lens member in a closed ring shape.

12. The method of claim 9, wherein the adhesive region is configured to include a portion of a gap between the first lens component and the second lens component in a circular ring shape,

laying a glue material on the second lens component based on the results of the active calibration and the relative tilt angle comprises:

calculating a position in the bonding region where the gap height is minimum and a position in the bonding region where the gap height is maximum based on the result of the active calibration;

calculating a scaling factor based on the relative tilt angle, in which bonding region the height of the gap increases linearly according to the scaling factor from a minimum height of the gap to a maximum height of the gap; and

and arranging a rubber material on the second lens component in the bonding area according to the proportionality coefficient.

13. The method of claim 12, wherein laying a glue material on the second lens component in the bonding region according to the scaling factor comprises:

arranging rubber materials in a linear and incremental manner from the position with the minimum gap height to the position with the maximum gap height; and

and arranging the rubber material in a linearly descending manner from the position with the maximum gap height to the position with the minimum gap height.

14. The method of claim 12, wherein laying a glue material on the second lens component in the bonding region according to the scaling factor comprises: and controlling the amount of the rubber material by an air pump in a linear pressurization and/or decompression mode according to the proportional coefficient.

15. The method of claim 9, wherein the glue is further configured such that after curing thereof, the glue at each location of the bonding area is the same as the bonding area of the second lens component.

16. A system for assembling an optical lens, the optical lens comprising: a first lens component comprising at least one first lens; and a second lens part having a gap with the first lens part and including a second barrel and at least one second lens mounted in the second barrel, the at least one second lens and the at least one first lens together constituting an imageable optical system, characterized in that the system comprises:

an adjustment mechanism to adjust a relative position of the first lens piece and the second lens piece based on active calibration, wherein the first lens piece and the second lens piece have a gap of unequal height therebetween;

a calculation mechanism that calculates a result of the active calibration by the adjustment mechanism to obtain a volume of the glue material to be provided in a bonding area of at least a part of a gap between the first lens part and the second lens part so that the volume of the glue material at each position of the bonding area positively correlates with a height of the gap at that position of the bonding area; and

and the glue drawing mechanism is used for applying the calculated volume of glue material at each position of the bonding area.

17. An optical lens according to claim 16, wherein the painting mechanism comprises:

a glue discharging unit;

the moving unit moves the glue discharging unit; and

the flow control unit controls the amount of the glue material output by the glue output unit; or

And a speed control unit controlling a moving speed of the moving unit.

Technical Field

The present application relates to the field of optical imaging technology, and in particular, to an optical lens and a method and system for assembling an optical lens.

Background

With the popularization of mobile electronic devices, technologies related to an imageable optical device applied to a mobile electronic device for assisting a user in acquiring an image (e.g., video or image) have been rapidly developed and advanced, and in recent years, the imageable optical device has been widely applied to various fields such as medical treatment, security, industrial production, and the like.

To meet the increasing market demand, high pixel, small size, large aperture is an irreversible trend in the development of existing imageable optics. The market places increasing demands on the imaging quality of the imageable optics. Factors that affect the resolution of the imageable optics for 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 affecting the lens resolving power come from errors in the respective elements and their assembly, errors in the thickness of the lens spacer elements, errors in the assembly fitting of the respective lenses, variations in the refractive index of the lens material, and the like. The errors of each element and the assembly thereof comprise the errors of the optical surface thickness, the lens optical surface rise, the optical surface shape, the curvature radius, the single lens surface and the surface eccentricity, the lens optical surface inclination and the like of each lens monomer, and the sizes of the errors depend on the precision of the mold and the control capability of the molding precision. The error in the thickness of the lens spacing element depends on the machining accuracy of the element. The error of the fitting fit of each lens depends on the dimensional tolerance of the fitted components and the fitting accuracy of the lens. The error introduced by the change in refractive index of the lens material depends on the stability of the material and batch consistency.

The errors of the above elements affecting the image resolution have cumulative deterioration, and the cumulative errors increase with the increase of the number of lenses. The existing resolution solution is to perform tolerance control on the sizes of the elements with high relative sensitivity and compensate for lens rotation to improve the resolution, but because a lens with high pixels and large aperture is sensitive, the tolerance is required to be strict, such as: the eccentricity of a part of sensitive lens 1 mu m lens can bring about 9' image plane inclination, so that the processing and assembling difficulty of the lens is increased, and meanwhile, the feedback period in the assembling process is long, so that the process capability index (CPK) of the lens assembling is low, the fluctuation is large, and the reject ratio is high. As described above, because there are many factors affecting the resolution of the lens, the factors exist in a plurality of elements, and the control of each factor has a limit to the manufacturing accuracy, and if the accuracy of each element is simply improved, the improvement capability is limited, the improvement cost is high, and the increasingly improved imaging quality requirements of the market cannot be met.

On the other hand, in the process of processing the imageable optical device, the assembling process of each structural component (e.g., the mounting process of the photosensitive chip, the locking process of the motor lens, etc.) may cause the inclination of the photosensitive chip, and multiple inclined components are superposed, which may cause the resolving power of the imaging module not to reach the established specification, and further cause the low yield of the module factory. In recent years, module manufacturers have compensated for the tilt of the photosensitive chip through an Active Alignment (Active Alignment) process when assembling the imaging lens and the photosensitive module.

In order to overcome the above defects, the applicant proposes an assembly method for adjusting and determining the relative positions of the upper and lower sub-lenses based on an active calibration process, and then bonding the upper and lower sub-lenses together according to the determined relative positions, thereby manufacturing a complete optical lens or camera module. The solution can improve the process capability index (CPK) of the optical lens or the camera module which is produced in large scale; the requirements on the precision and the assembly precision of each element of a material (such as a sub-lens or a photosensitive assembly for assembling an optical lens or a camera module) can be relaxed, so that the overall cost of the optical imaging lens and the camera module is reduced; can adjust the various aberrations of the module of making a video recording in real time at the equipment in-process, reduce the defective rate, reduction in production cost promotes the formation of image quality. However, active alignment and bonding based on the upper and lower sub-lenses is a completely new production process, and there are still many challenges to realize stable and reliable mass production based on this production process. For example, after the upper and lower sub-lenses are actively calibrated, the upper and lower sub-lenses are relatively inclined to form a gap with different heights, so that the adhesive material is unevenly distributed between the upper sub-lens and the lower sub-lens when the upper sub-lens and the lower sub-lens are bonded by the same amount of adhesive material. For example, fig. 1 shows a cross-sectional view of an exemplary optical lens in the related art, as shown in fig. 1, a height of a gap between upper and lower sub-lenses on a left side is smaller than a height of a gap between upper and lower sub-lenses on a right side, and a right side glue is not adhered to the upper sub-lenses. Therefore, various risks such as flash, non-sticking, etc. may occur in the related art production process, which may affect the overall reliability of the optical lens quality.

Disclosure of Invention

The present application aims to provide a solution that overcomes at least one of the above-mentioned drawbacks of the prior art.

An aspect of the present application provides an optical lens, which may include:

a first lens component comprising at least one first lens;

the second lens component has a gap with different heights with the first lens component and comprises a second lens barrel and at least one second lens installed in the second lens barrel, and the at least one second lens and the at least one first lens jointly form an imageable optical system; and

a glue material disposed in a bonding area of at least a portion of a gap between the first lens component and the second lens component and bonding the first lens component and the second lens component together,

wherein the volume of the glue material at each position of the bonding area is positively correlated with the height of the gap at the position of the bonding area.

According to an embodiment of the application, the volume of glue material at each location of the bonding area may be linearly related to the height of the gap at that location of the bonding area.

According to an embodiment of the application, the bonding area may comprise: a portion of a gap between the first lens component and the second lens component in a closed loop shape; or a portion other than the gap having the largest height among portions of the gap between the first lens member and the second lens member in a closed ring shape; or a portion other than the gap having the smallest height among a portion of the gap between the first lens member and the second lens member in a closed ring shape.

According to an embodiment of the present application, the adhesive material at each position of the adhesive area may be the same as the adhesive area of the second lens component.

According to an embodiment of the present application, the first lens part may include a first lens, and the adhesive material is disposed in a bonding area of at least a portion of a gap between the first lens and the second lens barrel.

According to an embodiment of the present application, the first lens part may further include a first barrel, the at least one first lens being mounted within the first barrel, wherein the glue material is disposed in a bonding area of at least a portion of a gap between the first barrel and the second barrel.

According to an embodiment of the present application, the glue material may include a glue material cured by light, heat, moisture, anaerobic or oxidation.

According to another aspect of the present invention, a camera module is further provided, which includes the optical lens provided in the foregoing embodiment.

Yet another aspect of the present application provides a method of assembling an optical lens, which may include:

preparing a first lens part and a second lens part, wherein the first lens part comprises at least one first lens, and the second lens part comprises a second lens barrel and at least one second lens mounted in the second lens barrel;

pre-positioning the first lens part and the second lens part to enable the at least one second lens and the at least one first lens to jointly form an imaging optical system;

adjusting relative positions of the first lens component and the second lens component based on active calibration, wherein the first lens component and the second lens component have gaps of unequal heights therebetween;

acquiring a relative inclination angle between the bonding surface of the first lens component and the bonding surface of the second lens component; and

disposing a glue material on the second lens component based on a result of the active calibration and the relative tilt angle so as to be disposed in a bonding region of at least a portion of a gap between the first lens component and the second lens component,

wherein the glue is arranged such that the volume of glue at each position of the bonding area is positively correlated with the height of the gap at that position of the bonding area.

According to an embodiment of the present application, obtaining the relative tilt angle between the adhesive surface of the first lens component and the adhesive surface of the second lens component may include: calculating the result of the active calibration to obtain a relative inclination angle between the bonding surface of the first lens component and the bonding surface of the second lens component; or measuring the bonding surface (or the surface parallel to the bonding surface) of the first lens component and the bonding surface (or the surface parallel to the bonding surface) of the second lens component by a laser height measuring mechanism

A plane parallel thereto) and calculates the result of the measurement to obtain a relative inclination angle between the adhering surface of the first lens member and the adhering surface of the second lens member.

According to an embodiment of the application, the bonding area may be configured to include: a portion of a gap between the first lens component and the second lens component in a closed loop shape; or a portion other than the gap having the largest height among portions of the gap between the first lens member and the second lens member in a closed ring shape; or a portion other than the gap having the smallest height among a portion of the gap between the first lens member and the second lens member in a closed ring shape.

According to an embodiment of the present application, the bonding region may be provided to include a portion of a gap between the first lens part and the second lens part in a circular ring shape, and the disposing of the adhesive material on the second lens part based on the result of the active calibration and the relative inclination angle may include: calculating a position in the bonding region where the gap height is minimum and a position in the bonding region where the gap height is maximum based on the result of the active calibration; calculating a scaling factor based on the relative tilt angle, in which bonding region the height of the gap increases linearly according to the scaling factor from a minimum height of the gap to a maximum height of the gap; and arranging a glue material on the second lens component in the bonding area according to the proportionality coefficient.

According to an embodiment of the present application, disposing a glue material on the second lens component according to the proportionality coefficient in the bonding region may include: arranging rubber materials in a linear and incremental manner from the position with the minimum gap height to the position with the maximum gap height; and arranging the rubber material in a linearly descending manner from the position with the maximum gap height to the position with the minimum gap height.

According to an embodiment of the present application, disposing a glue material on the second lens component according to the proportionality coefficient in the bonding region may include: and controlling the amount of the rubber material by an air pump in a linear pressurization and/or decompression mode according to the proportional coefficient.

According to an embodiment of the present application, the adhesive material may be further provided such that, after being cured, the adhesive material at each position of the adhesive area is the same as the adhesive area of the second lens component.

Yet another aspect of the present application provides a system for assembling an optical lens, the optical lens comprising: a first lens component comprising at least one first lens; and a second lens part having a gap with the first lens part and including a second barrel and at least one second lens mounted in the second barrel, the at least one second lens and the at least one first lens together constituting an imageable optical system, characterized in that the system comprises:

an adjustment mechanism to adjust a relative position of the first lens piece and the second lens piece based on active calibration, wherein the first lens piece and the second lens piece have a gap of unequal height therebetween;

a calculation mechanism that calculates a result of the active calibration by the adjustment mechanism to obtain a volume of the glue material to be provided in a bonding area of at least a part of a gap between the first lens part and the second lens part so that the volume of the glue material at each position of the bonding area positively correlates with a height of the gap at that position of the bonding area; and

and the glue drawing mechanism is used for applying the calculated volume of glue material at each position of the bonding area.

According to an embodiment of the application, the painting mechanism may include: a glue discharging unit; the moving unit moves the glue discharging unit; the flow control unit controls the amount of the glue material output by the glue output unit; or a speed control unit controlling a moving speed of the moving unit.

According to the technical scheme that this application provided, can confirm gluey material quantity according to the height in the clearance between the camera lens part for in bonding regional different positions department, the volume of the gluey material that highly different clearances were applyed is corresponding different, thereby has guaranteed the overall reliability of optical lens quality.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 shows a cross-sectional view of an exemplary prior art optical lens;

FIG. 2 is a cross-sectional view of an optical lens according to one embodiment of the present application;

FIG. 3 is a cross-sectional view of an optical lens according to another embodiment of the present application;

FIG. 4 is a schematic view of a bonding area according to one embodiment of the present application;

FIG. 5 is a flow chart of a method of assembling an optical lens according to one embodiment of the present application;

FIG. 6 is a schematic diagram illustrating a positional relationship between an adhesive surface of a first lens component and an adhesive surface of a second lens component of an optical lens according to some embodiments of the present application;

fig. 7 is a flow chart of laying out a glue material on the second lens component based on the results of the active calibration and the relative tilt angle according to one embodiment of the present application. (ii) a

FIG. 8 is a schematic block diagram of a system for assembling an optical lens according to one embodiment of the present application; and

fig. 9A and 9B are each a schematic block diagram of a painting mechanism according to one embodiment of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Accordingly, the first lens component discussed below may also be referred to as a second lens component without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of each component may have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" 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 "approximately", "about" and the like are used as table-approximating terms and not as table-degree terms, and are intended to account for inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.

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

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In addition, unless explicitly defined or contradicted by context, the specific steps included in the methods described herein are not necessarily limited to the order described, but can be performed in any order or in parallel. For example, the active calibration steps described herein may be performed interchangeably with the adhesive placement steps without affecting the practice of the present embodiments. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 2 shows a cross-sectional view of an optical lens 1000 according to one embodiment of the present application.

Referring to fig. 2, the optical lens 1000 may include: a first lens component 100, a second lens component 200, and a glue material 300 that bonds the first and second lens components together. Although only two lens parts are prepared in the embodiment shown in fig. 2, it can be understood by those skilled in the art that the number of lens parts may be determined according to actual needs without particular limitations.

According to an embodiment of the present application, the first lens component 100 may include at least one first lens 110. The second lens component 200 and the first lens component 100 may have gaps with unequal heights, for example, as shown in fig. 2, including a gap on the left side and a gap on the right side. The second lens part 200 may include a second barrel 220 and at least one second lens 210 mounted within the second barrel 220. As shown in fig. 2, five second lenses 210 are shown in the present embodiment. However, those skilled in the art will readily understand that the number of lenses included in each lens component may be determined according to actual needs without particular limitation. For example, the first lens part 100 may be equipped with two, three or four lenses, while the second lens part 200 may be equipped with one, two, three or four lenses. The at least one second lens 210 and the at least one first lens 110 together form an imageable optical system. It should be noted that the lens barrel functions to fix the corresponding lens and maintain the relative positions of the lenses in the same lens barrel. Therefore, in the case where a certain lens part is equipped with only one lens, the lens barrel may also be omitted.

The glue material 300 may be disposed in a bonding area of at least a portion of a gap between the first lens component 100 and the second lens component 200. The glue material 300 may comprise any suitable glue material that is cured by light, heat, moisture, anaerobic, or oxidation. As used herein, the term "bonding region" is intended to mean a part of a space region between lens parts in the optical axis direction of an optical lens, and a glue material is filled in the bonding region and bonds the lens parts together. Those skilled in the art will appreciate that the adhesive area has a width, generally smaller, in the plane of the lens component. Also, the "bonded area" will intersect the lens component, and the area of the intersection is referred to herein as the "bonded area". Furthermore, as used herein, the term "position" of the bonding region is intended to mean a portion corresponding to a small section of the bonding region in the plane in which the lens component lies in which the heights of the bonding regions in the optical axis direction of the optical lens are considered to be equal, i.e., the difference in height can be ignored.

In the embodiment shown in fig. 2, the first lens part 100 includes a first lens 110, and the adhesive material 300 is disposed in the gap between the first lens 110 and the second lens barrel 220.

In some embodiments, the bonded area may comprise a gap between the first lens component 100 and the second lens component 200 in a closed loop shape, i.e., the bonded area is in a closed loop shape on a plane in which the first lens component 100 and the second lens component 200 lie. In certain embodiments, closed loops include, but are not limited to, circular loops, square loops, and the like.

As shown in fig. 2, the position of the left adhesive material 300 in the figure is a first position of the bonding area, where a gap between the first lens 110 and the second barrel 220 is a first gap; the right side of the figure is located at a second position of the bonding area, where the gap between the first lens 110 and the second lens barrel 220 is a second gap. In the present embodiment, the height h1 of the first gap at the first position of the bonding region is smaller than the height h2 of the second gap at the second position of the bonding region, and accordingly, the volume V1 of the glue material 300 at the first position of the bonding region is smaller than the volume V2 of the glue material 300 at the second position of the bonding region. In other words, at a position where the height of the gap of the bonding region is small, the volume of the rubber material 300 is correspondingly small; and at the position where the height of the gap of the bonding area is larger, the volume of the glue material 300 is correspondingly larger, that is, the volume of the glue material at each position of the bonding area is positively correlated with the height of the gap at that position of the bonding area. As used herein, the term "height" is intended to mean a distance in the optical axis direction of an optical lens.

According to the technical scheme of the embodiment of the application, the volume of the glue material at each position of the bonding area is positively correlated with the height of the gap at the position of the bonding area, so that the situations of glue overflow and/or non-bonding and the like in the prior art are at least partially reduced, and the overall reliability of the quality of the optical lens is ensured.

In some embodiments, the volume V of the glue material at each location of the bond area may be non-linearly related to the height h of the gap at that location of the bond area, e.g., V ═ ah²Where a is a coefficient.

In other embodiments, the volume V of glue at each location of the bond area may be linearly related to the height h of the gap at that location of the bond area, e.g., V ═ ah + b, where b is a constant.

According to an exemplary embodiment of the present application, a volume V of the glue at each position of the bonding area may be proportional to a height h of the gap at the position of the bonding area, e.g., V ═ hs, where s is a bonding area of the glue and the second lens component at the position. In other words, the glue material located at the first position of the bonding area and the glue material located at the second position of the bonding area may be the same as the bonding area of the second lens component. In this embodiment, since the volume of the rubber material is proportional to the height of the gap at each position of the bonding area, and the bonding area between the rubber material and the second lens component is the same, the rubber material can be substantially uniformly distributed in the bonding area between the first lens component and the second lens component, so that the bonding force between the rubber material and the lens component is substantially uniformly distributed, and the stability of the quality of the optical lens is ensured.

Fig. 3 shows a cross-sectional view of an optical lens 2000 according to another embodiment of the present application.

As shown in fig. 3, the optical lens 2000 is different from the optical lens 1000 shown in fig. 2 only in that the first lens part 100 further includes a first barrel 120, and the first lens 110 is mounted in the first barrel 120. Although only one first lens 110 is shown in fig. 3, as described above, it is easily understood by those skilled in the art that the number of first lenses 110 included in the first lens part 100 may be determined according to actual needs without particular limitations. For example, in some embodiments, two, three, four, or five lenses may be mounted in the first barrel 120. In this embodiment, the glue material 300 is disposed in a bonding area of at least a portion of the gap between the first barrel 120 and the second barrel 220.

FIG. 4 shows a schematic view of a bonding area according to one embodiment of the present application.

As shown in fig. 4, the bonding area may have a notch having a center located at a gap having a smallest height among gaps between the first lens part 100 and the second lens part 200. In other words, the bonding area may include a portion other than the gap having the smallest height among a portion of the gap between the first lens part 100 and the second lens part 200 in the closed ring shape. It will be appreciated by those skilled in the art that the width of the gap can be set as desired.

According to another exemplary embodiment of the present application, the bonding area may include a portion other than a gap having a maximum height among a portion of the gap between the first lens part 100 and the second lens part 200 in a closed ring shape. In other words, the bonding area may have a notch having a center located at a highest-level gap among the gaps between the first lens part 100 and the second lens part 200.

It should be noted that the rubber material needs to be thickest at the gap with the highest height in the gap between the first lens part 100 and the second lens part 200, and the variation amount of the rubber material increases with the increase of the size of the rubber material in the process of curing the rubber material 300 from the liquid state to the solid state. According to the technical scheme of the embodiment, the glue material is not arranged at the gap with the largest height, so that the largest variation of the glue material can be reduced, and the stability of the shape of the optical lens is ensured.

Some embodiments of the present application further provide a camera module including the optical lens described above.

Fig. 5 is a flowchart of a method S1000 of assembling an optical lens according to an embodiment of the present application.

The method S1000 may include:

s100 prepares a first lens part including at least one first lens and a second lens part having a gap with the first lens part and including a second barrel and at least one second lens mounted in the second barrel. It should be noted that "preparing" herein includes acts and/or steps of manufacturing the lens component, and also acts and/or steps of obtaining the lens component in other manners. The relative position between these lens components can be adjusted in the following manner.

S200, pre-positioning the first lens component and the second lens component, so that the at least one second lens and the at least one first lens form an imaging optical system.

S300, adjusting the relative positions of a first lens part and a second lens part based on active calibration, wherein the first lens part and the second lens part have gaps with unequal heights;

s400 acquires a relative inclination angle between the adhering surface of the first lens part and the adhering surface of the second lens part. It should be noted that the "bonding surface" herein is a surface of the lens component for contacting with the rubber material for bonding, for example, in fig. 2 and 3, the bonding surface of the second lens component 200 is a top end surface of the second lens barrel 200 for contacting with the rubber material 300.

S500 lays a glue material on the second lens part based on the result of the active calibration and the relative inclination angle so as to dispose the glue material in a bonding area of at least a part of the gap between the first lens part and the second lens part, wherein the glue material is disposed such that a volume of the glue material at each position of the bonding area is positively correlated with a height of the gap at the position of the bonding area.

The steps of the method S1000 described above may be described with reference to the optical lens 1000 of fig. 2. For example, in step S100, the first lens part 100 and the second lens part 200 shown in fig. 2 are prepared. The first lens component 100 may include at least one first lens 110. The second lens part 200 may include a second barrel 220 and at least one second lens 210 mounted within the second barrel.

In step S200, the first lens part 100 and the second lens part 200 are pre-positioned so that the at least one second lens 210 and the at least one first lens 110 together form an imageable optical system.

In step S300, the relative positions of the first lens part 100 and the second lens part 200 are adjusted based on active calibration, wherein the first lens part and the second lens part have gaps with unequal heights, as shown in fig. 2, for example, the height h1 of a first gap between the first lens 110 and the second lens barrel 220 at a first position where the glue 300 on the left side is located in the figure is smaller than the height h2 of a second gap between the first lens 110 and the second lens barrel 220 at a second position where the glue 300 on the right side is located in the figure.

In step S400, a relative inclination angle between the adhering surface of the first lens part 100 and the adhering surface of the second lens part 200 is acquired. Fig. 6 is a schematic view showing a positional relationship between bonding surfaces of two lens parts, and it will be understood by those skilled in the art that fig. 6 may exaggerate a tilt angle of the two lens parts, a height difference between different gaps, and the like for the sake of clarity. As shown in fig. 6, the relative inclination angle between the adhered surface of the first lens part 100 and the adhered surface of the second lens part 200 is a. In some embodiments, the relative tilt angle a between the adhesive surface of the first lens component 100 and the adhesive surface of the second lens component 200 can be obtained by calculating the result of the active calibration. In other embodiments, the relative inclination angle a between the adhering surface of the first lens component 100 and the adhering surface of the second lens component 200 may be obtained by measuring the adhering surface (or a surface parallel thereto) of the first lens component 100 and the adhering surface (or a surface parallel thereto) of the second lens component 200 by a laser height measuring mechanism and calculating the measurement result, for example, a plane may be determined by measuring three points, and then performing the correlation calculation. It will be understood by those skilled in the art that the scope of the present application is not limited thereto, and the relative inclination angle a between the adhering surface of the first lens part 100 and the adhering surface of the second lens part 200 may also be obtained by other suitable means.

In step S500, the rubber 300 is laid on the second lens part 200 based on the result of the active calibration and the relative inclination angle a so that the rubber 300 is disposed in the bonding area of at least a portion of the gap between the first lens part 100 and the second lens part 200. As shown in fig. 2, the rubber material 300 is disposed such that the volume V1 of the rubber material 300 at the first position on the left side is smaller than the volume V2 of the rubber material 300 at the second position on the right side. In other words, at a position where the height of the gap of the bonding region is small, the volume of the rubber material 300 is correspondingly small; and at the position where the height of the gap of the bonding area is larger, the volume of the glue material 300 is correspondingly larger, that is, the volume of the glue material at each position of the bonding area is positively correlated with the height of the gap at that position of the bonding area.

According to the optical lens assembling method S1000 of the embodiment, the optical lens can be assembled such that the volume of the adhesive material at each position of the bonding area is positively correlated with the height of the gap at the position of the bonding area, thereby ensuring the overall reliability of the quality of the optical lens.

In some embodiments, the volume of glue at each location of the bond area may be linearly related to the height of the gap at that location of the bond area.

In some embodiments, the adhesive region may be arranged to comprise a gap between the first lens part and the second lens part in the form of a closed loop, i.e. the adhesive region is in the form of a closed loop on a plane in which the first lens part and the second lens part lie. In certain embodiments, closed loops include, but are not limited to, circular loops, square loops, and the like.

In some embodiments, the adhesive region may be provided to include a portion other than a gap having a largest height among portions of a gap between the first lens part and the second lens part in a closed ring shape. As described above, according to the technical solution of this embodiment, the glue material is not disposed at the gap with the largest height, so that the largest variation of the glue material can be reduced, and the stability of the shape of the optical lens is ensured.

In some embodiments, for example, as shown in fig. 4, the bonding area may be provided to include a portion other than the gap having the smallest height among a portion of the gap between the first lens part and the second lens part in a closed ring shape.

As described above, fig. 6 is a schematic view showing a positional relationship between the adhering surface of the first lens component and the adhering surface of the second lens component of the optical lens according to some embodiments of the present application.

In the embodiment shown in fig. 6, the contour shape of the adhesive surfaces of the first lens component and the second lens component are schematically shown as circles, but the scope of the present application is not limited thereto, and those skilled in the art will appreciate that the shape of the adhesive surfaces may be any suitable shape, for example, a rectangle. As shown in fig. 6, the relative inclination angle between the adhering surface of the first lens component and the adhering surface of the second lens component is a. For clarity of illustrating the concept of the present application, the plane in which the adhesive surface of the second lens component is located is shown as horizontal, and those skilled in the art will appreciate that in actual operation, the plane in which the adhesive surface of the second lens component is located is generally horizontal, although the scope of the present application is not limited thereto.

In some embodiments, for example as shown in FIG. 6, the adhesive area may be configured to include a portion of the gap between the first lens component and the second lens component in the shape of a circular ring, that is, the glue material may be circular on the second lens component, as shown by the dashed circle in FIG. 6. However, the scope of the present application is not limited thereto, and those skilled in the art will appreciate that the shape of the bonding surface may be any suitable shape, such as rectangular, etc.

Fig. 7 is a flowchart of S500 laying a glue material on the second lens component based on the result of the active calibration and the relative tilt angle according to an embodiment of the present application.

Referring to fig. 6 and 7, in the case where the bonding region is provided in a circular ring shape, the step S500 of disposing the adhesive material on the second lens part based on the result of the active calibration and the relative inclination angle may include:

s501 calculates the position where the minimum height Hmin of the gap in the bonding region and the position where the maximum height Hmax of the gap are located, based on the result of the active calibration. In three-dimensional space, there must be a minimum height of the gap and a maximum height of the gap between two non-parallel planes. Furthermore, since the rubber material is circular on the second lens part, the position of the maximum height Hmax can be calculated after the position of the minimum height Hmin is determined, and vice versa, since both are necessarily on the same diameter, as indicated by the dashed line segment in fig. 6.

S502 calculates a proportionality coefficient based on the relative inclination angle a, in which the height of the gap is linearly increased from the minimum height Hmin of the gap to the maximum height Hmax of the gap according to the proportionality coefficient. Specifically, since the rubber material is circular on the second lens part, the height of the gap in the bonding region increases linearly by a proportionality factor from the minimum height Hmin along the circumference to the maximum height Hmax, and then decreases linearly by the proportionality factor from the maximum height Hmax along the circumference to the minimum height Hmin. After the circle that the glue material takes on the second lens component is determined (i.e., the radius of the circle is determined), the scaling factor may be determined by the tilt angle a.

S503 lays the adhesive material on the second lens part in the bonding area according to the scale factor.

In some embodiments, the disposing the adhesive material on the second lens component according to the scale factor in the bonding region S503 may include: arranging rubber materials in a linear and incremental manner from the position with the minimum gap height to the position with the maximum gap height; and arranging the rubber material in a linearly descending manner from the position with the maximum gap height to the position with the minimum gap height. It will be appreciated by those skilled in the art that the above order may be reversed. According to the technical scheme of the embodiment, the amount of the applied glue material can be conveniently controlled.

In some embodiments, laying the adhesive material on the second lens component in the bonding region according to a proportionality coefficient may include: and controlling the amount of the rubber material by an air pump in a linear pressurization and/or decompression mode according to the proportionality coefficient. According to the technical scheme of the embodiment, the linear control of the air pump is simple and convenient, so that the operation of the glue painting mechanism for applying the glue material can be simplified.

In some embodiments, the adhesive material may be further configured such that, after curing thereof, the adhesive material at each position of the adhesive area is the same as the adhesive area of the second lens component. According to the technical scheme of the embodiment, the rubber material can be basically and uniformly distributed in the bonding area between the first lens part and the second lens part, so that the bonding force between the rubber material and the lens part is basically and uniformly distributed, and the stability of the quality of the optical lens is ensured.

FIG. 8 is a schematic block diagram of a system 3000 for assembling an optical lens according to one embodiment of the present application. Wherein, optical lens includes: a first lens component comprising at least one first lens; and the second lens part is provided with a gap with the first lens part and comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the at least one second lens and the at least one first lens jointly form an imaging optical system.

Referring to fig. 8, a system 3000 for assembling an optical lens may include:

an adjustment mechanism 3100 that adjusts relative positions of the first lens component and the second lens component based on active calibration, wherein the first lens component and the second lens component have gaps therebetween that are unequal in height;

a calculation mechanism 3200 that calculates a result of the active calibration of the adjustment mechanism to obtain a volume of the glue material in a bonding area to be disposed in at least a part of a gap between the first lens part and the second lens part such that the volume of the glue material at each position of the bonding area is positively correlated with a height of the gap at the position of the bonding area; and

the glue dispensing mechanism 3300 applies the calculated volume of glue material at each location of the bonded area.

According to the optical lens assembly system 3000 of the present embodiment, the optical lens can be assembled such that the volume of the adhesive material at each position of the bonding region is positively correlated with the height of the gap at the position of the bonding region, thereby ensuring the overall reliability of the quality of the optical lens.

In some embodiments, the volume of glue at each location of the bond area may be linearly related to the height of the gap at that location of the bond area.

Regarding the operation of the computing mechanism 3200, it can be generally computed according to the methods in the foregoing embodiments (e.g., the embodiments described with reference to fig. 5-7), and will not be described herein again.

Fig. 9A and 9B are each a schematic block diagram of a painting mechanism 3300 according to one embodiment of the present application.

As shown in fig. 9A, a painting mechanism 3300 according to one embodiment of the present application may include:

a glue discharging unit 3310;

a moving unit 3320, which moves the glue discharging unit 3310; and

the flow control unit 3330 controls the amount of the glue material output from the glue output unit 3310. In certain embodiments, the flow control unit 3330 may be an air pump.

As shown in fig. 9B, a painting mechanism 3300 according to another embodiment of the present application may include:

a glue discharging unit 3310;

a moving unit 3320, which moves the glue discharging unit 3310; and

velocity control section 3340 controls the moving velocity of moving section 3320.

According to the technical scheme of the embodiment of fig. 9A and 9B, the control of the required glue amount can be conveniently and linearly realized, and the operation is simplified.

The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the technical idea. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.