CN112534328A - Optical lens, camera module and assembling method thereof - Google Patents

Optical lens, camera module and assembling method thereof Download PDF

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Publication number
CN112534328A
CN112534328A CN201980036283.6A CN201980036283A CN112534328A CN 112534328 A CN112534328 A CN 112534328A CN 201980036283 A CN201980036283 A CN 201980036283A CN 112534328 A CN112534328 A CN 112534328A
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China
Prior art keywords
lens
barrel
optical
component
glue
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Granted
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CN201980036283.6A
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Chinese (zh)
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CN112534328B (en
Inventor
方银丽
蒋恒
田中武彦
刘林
褚水佳
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Ningbo Sunny Opotech Co Ltd
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Ningbo Sunny Opotech Co Ltd
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Priority claimed from CN201810403057.4A external-priority patent/CN110412707A/en
Priority claimed from CN201810403069.7A external-priority patent/CN110412708A/en
Priority claimed from CN201810401370.4A external-priority patent/CN110412706A/en
Application filed by Ningbo Sunny Opotech Co Ltd filed Critical Ningbo Sunny Opotech Co Ltd
Priority claimed from PCT/CN2019/084449 external-priority patent/WO2019206255A1/en
Publication of CN112534328A publication Critical patent/CN112534328A/en
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Publication of CN112534328B publication Critical patent/CN112534328B/en
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Abstract

An optical lens, comprising: a first lens component (100) comprising at least one first lens (120); the second lens component (200) comprises a second lens barrel (210) and at least one second lens (220) arranged on the second lens barrel, and the at least one second lens and the at least one first lens form an imaging optical system together, wherein at least one part of the outer side surface of the second lens (230) at the bottommost end of the at least one second lens is exposed outside the second lens barrel, and the top surface of the second lens at the bottommost end is supported against the bottom surface of the second lens barrel; and a connecting medium adapted to secure the first lens component and the second lens component together. A corresponding camera module, an optical lens and a camera module assembling method are also provided. The size of the optical lens in the direction perpendicular to the optical axis can be effectively reduced on the premise of established optical design, and meanwhile, the imaging quality of the optical lens can be ensured.

Description

Optical lens, camera module and assembling method thereof
Cross-referencing
The present application claims priority of the present application on the patent application No. 201810401370.4 entitled "optical lens, camera module and assembly method thereof" filed in 28.4.2018 in the office of china, the application No. 201820629867.7 entitled "optical lens, camera module and assembly method thereof" filed in 28.4.2018 in the office of china, the application No. 201810403057.4 entitled "optical lens, camera module and assembly method thereof" filed in 28.4.2018 in the office of china, the application No. 201820629848.4 entitled "optical lens and camera module" filed in 28.4.2018 in the office of china, the application No. 201810403069.7 entitled "optical lens, camera module and assembly method thereof" filed in 28.4.8 in the month, and the application No. 28/28.4.2018 in the office of china, Utility model application No. 201820629876.6 entitled "optical lens and camera module," which is incorporated herein by reference in its entirety.
Technical Field
The application relates to the technical field of optical imaging, in particular to an optical lens, a camera module and an assembling method thereof.
Background
With the popularization of mobile electronic devices, technologies related to camera modules applied to mobile electronic devices for helping users to obtain images (e.g., videos or images) have been rapidly developed and advanced, and in recent years, camera modules have been widely applied to various fields such as medical treatment, security, industrial production, and the like.
In order to meet the increasingly wide market demands, a high-pixel, small-size and large-aperture diaphragm is an irreversible development trend of the existing camera module. However, the need to achieve high pixel, small size, large aperture in the same imaging mold is very difficult. For example, the compact development of mobile phones and the increase of the mobile phone screen occupation ratio make the space inside the mobile phone available for the front camera module smaller and smaller, and the market puts forward higher and higher demands on the imaging quality of the camera module. In addition, the accommodating space of the front camera module of the mobile phone is far smaller than that of the rear camera of the mobile phone. However, the pursuit of high pixel, large aperture, etc., characteristics has determined that it is difficult to further reduce the size of the lens in terms of the optical design of the lens.
On the other hand, the market has put forward higher and higher demand to the formation of image quality of the module of making a video recording. Mass-produced optical lenses and camera modules are also required to take into account the quality of optical imaging lenses and manufacturing errors during module packaging in the field of compact camera modules (e.g., camera modules for mobile phones). 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 1um 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 is long in the assembling process, so that the process capability index (CPK) of 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.
Further, in the field of mobile phone camera modules, typical mass-production optical lenses in the market are assembled by being embedded one by one. Specifically, a lens barrel with a step-shaped bearing surface on the inner side is prepared in advance, and then each lens from small to large is embedded into the lens barrel one by one and bears against the corresponding step-shaped bearing surface to obtain a complete optical lens. On the basis, how to further reduce the sizes of the optical lens and the camera module on the premise of ensuring high imaging quality and ensure the reliability of the module or the lens are the problems which need to be solved urgently at present.
The applicant provides an assembling method for adjusting and determining the relative positions of an upper sub-lens and a lower sub-lens based on an active calibration process, and then bonding the upper sub-lens and the lower sub-lens together according to the determined relative positions so as to manufacture a complete optical lens or a 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 calibration of the optical system of the lens is a new production process, and the actual mass production needs to consider many factors such as reliability, falling resistance, weather resistance and manufacturing cost of the optical lens and the camera module, and sometimes needs to face various non-measurable factors to cause yield reduction. For example, in one process scheme, a glue material is filled between the first lens component and the second lens component to maintain the first lens component and the second lens component in relative positions determined by active calibration. However, in actual trial production, the imaging quality of the optical lens and the camera module is often degraded compared with that obtained in the active calibration stage, and the degradation sometimes exceeds the tolerance range, resulting in poor product. The applicant has found that, after an active calibration process is introduced to the assembly of an optical lens or a camera module, variations of a plastic material, a lens barrel or a lens and other unknown factors may be the causes of the above problems. There is a need for a solution that overcomes the above problems to further increase product yield.
Disclosure of Invention
According to an aspect of the present application, there is provided an optical lens including: a first lens component comprising at least one first lens; the second lens component comprises a second lens barrel and at least one second lens arranged on the second lens barrel, and the at least one second lens and the at least one first lens form an imaging optical system together, wherein at least one part of the outer side surface of the second lens at the bottommost end in the at least one second lens is exposed outside the second lens barrel, and the top surface of the second lens at the bottommost end is supported against the bottom surface of the second lens barrel; and a connecting medium adapted to secure the first lens component and the second lens component together.
According to another aspect of the present application, there is also provided a camera module including the optical lens according to any of the embodiments.
According to another aspect of the present application, there is also provided an optical lens assembly method, the optical lens including a first lens part and a second lens part, the first lens part including a first barrel and at least one first lens mounted in the first barrel, the second lens part including a second barrel and at least one second lens mounted in the second barrel, wherein the optical lens assembly method includes: pre-positioning the first lens part and the second lens part which are separated from each other, so that the at least one second lens and the at least one first lens form an imaging optical system together; adjusting and determining relative positions of the first lens component and the second lens component based on active calibration, wherein at least a portion of an outer side surface of a bottommost second lens of the at least one second lens is exposed outside of the second barrel, and a top surface of the bottommost second lens bears against a bottom surface of the second barrel; and bonding the first lens part and the second lens part by a glue material, wherein the glue material supports and fixes the first lens part and the second lens part after being solidified so as to keep the relative positions of the first lens part and the second lens part at the relative positions determined by active calibration.
Compared with the prior art, one or more of the technical schemes have at least one of the following beneficial effects:
1. the size of the optical lens in the direction perpendicular to the optical axis can be effectively reduced on the premise of established optical design, and meanwhile, the imaging quality of the optical lens can be ensured.
2. The size of the lens barrel in the direction perpendicular to the optical axis can be minimized on the premise of optical design.
3. The size of the lens barrel in the direction perpendicular to the optical axis can be reduced, the structural strength of the optical lens can be enhanced, and the reliability of the optical lens can be guaranteed.
According to another aspect of the present application, there is also provided an optical lens including: a first lens part including a first barrel and at least one first lens mounted within the first barrel; a second lens component which comprises a second lens barrel and at least one second lens arranged in the second lens barrel, wherein the at least one second lens and the first lens jointly form an imaging optical system, and the material of the first lens barrel is different from that of the second lens barrel; and the first rubber material is positioned in a first gap between the first lens part and the second lens part and is suitable for supporting and fixing the first lens part and the second lens part after solidification, wherein an included angle which is not zero is formed between the axis of the first lens part and the axis of the second lens part.
According to another aspect of the present application, there is also provided a camera module including the optical lens according to any of the embodiments.
According to another aspect of the present application, there is also provided an optical lens assembly method, the optical lens including a first lens part and a second lens part, wherein the first lens part includes a first barrel and at least one first lens mounted in the first barrel, and the second lens part includes a second barrel and at least one second lens mounted in the second barrel, wherein the first barrel is made of a material different from that of the second barrel. The optical lens assembling method comprises the following steps: pre-positioning the first lens part and the second lens part to enable the at least one first lens and the at least one second lens to jointly form an imaging optical system; performing active calibration according to the actually measured imaging result of the optical system, and determining the relative positions of the first lens component and the second lens component; and bonding the first lens piece and the second lens piece to support and fix a relative position of the first lens piece and the second lens piece.
Compared with the prior art, one or more of the technical schemes have at least one of the following beneficial effects:
1. the variation of the first lens component can be reduced to reduce the difference between the optical system state after the first rubber material is cured and the optical system state determined by the active calibration, so that the imaging quality of the lens or the module is guaranteed.
2. The expansion amount of the inner side surface of the first lens barrel from outside to inside and the expansion amount of the outer side surface of the first lens from inside to outside can be mutually reduced (or eliminated) through material selection of the first lens barrel, so that the deformation of the first lens part caused by heating (such as baking) is reduced, and the imaging quality of the lens or the module is further ensured.
3. The difference between the optical system state after the first glue material is cured and the optical system state determined by the active calibration can be reduced by reducing the shape variation or the position deviation of the first lens cone caused by moisture accumulation, so that the imaging quality of the lens or the module is ensured.
4. The deformation of the optical surface of the first lens due to clamping of the external shooting mechanism can be inhibited, the difference between the state of the optical system after the first rubber material is cured and the state of the optical system determined by active calibration can be reduced, and the imaging quality of the lens or the module can be further guaranteed.
According to another aspect of the present application, there is also provided an optical lens comprising a first lens component comprising a first lens having a first optical zone for optical imaging and a first structural zone outside the first optical zone; a second lens component including a second barrel and at least one second lens mounted on the second barrel, the at least one second lens and the first lens together constituting an imageable optical system, the second lens having a second optical area for optical imaging and a second structural area outside the second optical area, the second structural area and the second barrel constituting a structural area of the second lens component, and a first gap being provided between a top surface of the structural area of the second lens component and a bottom surface of the first structural area; and the first glue material is positioned in the first gap, extends outwards along the top surface of the structural area of the second lens component, surrounds the first structural area, and wraps at least part of the outer side surface of the first structural area.
According to another aspect of the present application, there is also provided a camera module, which includes the optical lens described in any one of the embodiments above.
According to another aspect of the present application, there is also provided an optical lens assembling method including: preparing a first lens part and a second lens part separated from each other, wherein the first lens part includes a first lens having a first optical area for optical imaging and a first structural area outside the first optical area, the second lens part includes a second barrel and at least one second lens mounted in the second barrel, the second lens has a second optical area for optical imaging and a second structural area outside the second optical area, and the second structural area and the second barrel constitute the structural area of the second lens part; pre-positioning the first lens part and the second lens part to enable the first lens and the at least one second lens to jointly form an imaging optical system; adjusting and determining relative positions of the first lens component and the second lens component based on active calibration; and bonding the first lens and the second lens component through a first glue material, wherein a first gap is formed between the top surface of the structure area of the second lens component and the bottom surface of the first structure area, the first glue material is positioned in the first gap and extends outwards along the top surface of the structure area of the second lens component and surrounds the first structure area, the outwards extending first glue material wraps at least one part of the outer side surface of the first structure area, and the first glue material fixes and keeps the first lens and the second lens component at the relative position determined by active calibration after being cured.
According to another aspect of the present application, there is also provided a camera module assembling method, including: assembling the optical lens by the optical lens assembling method; and manufacturing the camera module based on the assembled optical lens.
Compared with the prior art, one or more embodiments of the application have at least one of the following technical effects:
1. the resolution of the actual product of the optical lens (or camera module) based on active calibration can be promoted to be closer to the resolution obtained by active calibration by wrapping the first rubber material (the rubber material for bonding the first and second lens components) on the side surface of the first lens.
2. The diaphragm can be formed by adding the first lens barrel on the first lens, and the appearance of the optical lens barrel is more regular and beautiful.
3. The position deviation or deformation of the first lens caused by the variation of the first lens barrel can be inhibited, so that the resolution of the actual product of the optical lens (or the camera module) based on the active calibration is enabled to be closer to the resolution obtained by the active calibration.
4. The gap between the outer side surface and the top surface of the first lens and the first lens barrel can be completely filled with the glue material, so that the first lens cannot deform or shift due to gas expansion in the baking process.
5. The first lens can be prevented from deforming or displacing due to gas expansion in the baking process by the design of the air escape holes.
6. The glue drawing errors caused by careless operation (such as carelessly forming the second glue material into a completely closed ring shape) can be reduced through the air escape groove, and the yield is improved in mass production.
7. The first glue material can wrap the side surface of the first lens and/or cover the top surface of the structural area of the first lens only through single-time glue painting, so that the process steps are reduced.
Drawings
Exemplary embodiments are illustrated in referenced figures of the drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive.
FIG. 1 shows a schematic cross-sectional view of an optical lens 1000 of one embodiment of the present application;
FIG. 2 shows a perspective view of the bottom most second lens 230 in one embodiment of the present application;
FIG. 3 shows a schematic cross-sectional view of the bottommost second lens 230 in one embodiment of the present application;
FIG. 4 shows a schematic top view of the bottommost second lens 230 of one embodiment of the present application;
fig. 5 shows a schematic bottom view of the second barrel 210 corresponding to fig. 4;
fig. 6 is a schematic cross-sectional view illustrating an optical lens in an embodiment of the present application after the bottom surface 210A of the second barrel 210 is bonded to the bottommost second lens 230;
FIG. 7 shows a schematic top view of the bottommost second optic 230 of another embodiment of the present application;
fig. 8A shows a schematic bottom view of the second barrel 210 corresponding to fig. 7;
fig. 8B shows a schematic sectional view of the second barrel 210 taken along a sectional line a-a' shown in fig. 8A;
fig. 8C is a schematic view illustrating that the second lens 230 at the lowermost end is embedded in the second barrel 210 shown in fig. 8B;
FIG. 9 shows a schematic top view of a bottommost second lens 230 of a further embodiment of the present application;
fig. 10 shows a schematic bottom view of a second barrel 210 according to yet another embodiment of the present application;
fig. 11A-B illustrate a process of assembling the first lens component 100 in one embodiment of the present application;
fig. 12A to D illustrate a process of assembling the second lens component 200 in one embodiment of the present application;
FIGS. 13A-B illustrate an active calibration and bonding process of one embodiment of the present application;
FIG. 14A illustrates a relative position adjustment in active calibration in one embodiment of the present application;
FIG. 14B illustrates rotational adjustment in active calibration of another embodiment of the present application;
FIG. 14C illustrates a relative position adjustment with added v, w direction adjustment in active calibration of yet another embodiment of the present application;
FIG. 15 shows a schematic top view of the bottommost second lens of an embodiment of the present application;
FIG. 16 shows a schematic cross-sectional view of an optical lens of an embodiment of the present application;
FIG. 17 shows a schematic cross-sectional view of an optical lens of another embodiment of the present application;
FIG. 18 shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application;
fig. 19A to 19G illustrate an optical lens assembly method in one embodiment of the present application;
fig. 20A to 20F illustrate an optical lens assembly method in another embodiment of the present application;
FIG. 21A illustrates a relative position adjustment in active calibration in one embodiment of the present application;
FIG. 21B illustrates rotational adjustment in active calibration of another embodiment of the present application;
FIG. 21C illustrates a relative position adjustment with added v, w direction adjustment in active calibration according to yet another embodiment of the present application;
FIG. 22 shows a schematic cross-sectional view of an optical lens of an embodiment of the present application;
fig. 23 shows a schematic view of the first glue material 300 added on top of fig. 1 to wrap the entire outer side surface 1014 of the first structure region 1012 and cover the top surface 1015 of the first structure region 1012;
FIG. 24 is a schematic view showing the intermediate body of FIG. 23 after baking to permanently cure and fuse all of the first glue materials 300 together;
FIG. 25 shows a schematic cross-sectional view of an optical lens of another embodiment of the present application;
fig. 26 shows a schematic view of the addition of a first glue material 300 on top of fig. 25 to wrap around the entire outer side of the first structural region 1012 and cover the top surface of the first structural region 1012;
FIG. 27 shows an exemplary view of baking the intermediate body of FIG. 26 to permanently cure and fuse all of the first glue materials 300 together;
fig. 28 shows a schematic cross-sectional view of an optical lens of a further embodiment of the present application;
fig. 29 shows a schematic view of the addition of a first glue material 300 on top of fig. 28 to wrap around the entire outer side surface 1014 of the first structure region 1012 and cover the top surface 1015 of the first structure region 1012;
fig. 30 is a schematic view showing that all the first rubber 300 is permanently solidified and integrated after the semi-finished product shown in fig. 29 is baked;
FIG. 31 is a schematic diagram illustrating the periphery of the first adhesive 300 and the top surface 1015 of the first structural region 1012 of the first lens 101 after applying adhesive according to one embodiment of the present application;
fig. 32 shows a schematic view of moving the first barrel 102 over the first lens 101 and then bringing the first barrel 102 closer to the first lens 101;
fig. 33 shows a schematic view of the first barrel 102 contacting the added first glue material 300;
fig. 34 shows a schematic view of the first glue material 300 filling the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102;
FIG. 35 shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application;
FIG. 36A shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application;
FIG. 36B shows a modified first lens 101;
FIG. 37 illustrates a semi-finished product state after completing step S402 in one embodiment of the present application;
FIG. 38 is a schematic illustration of the semi-finished product of FIG. 16 being exposed to pre-cure the first glue material 300 in an embodiment of the present application;
fig. 39 is a schematic cross-sectional view illustrating a second glue material 500 drawn on the top surface of the second barrel 202 according to an embodiment of the present application;
fig. 40A shows a schematic top view of the top surface of an exemplary second barrel 202;
FIG. 40B shows an enlarged partial schematic view of the AA' section of FIG. 40A;
fig. 41A shows a schematic diagram of painting glue on the top surface of the second barrel 202 in an embodiment of the present application;
FIG. 41B shows an enlarged partial schematic view of the AA' section of FIG. 41A;
fig. 42 is a schematic diagram illustrating that the first barrel 102 is moved above the first lens 101 and then the first barrel 102 is gradually close to the first lens 101 according to an embodiment of the present application;
fig. 43 shows a schematic view of the second glue material 500 added to contact the bottom surface of the first barrel 102 in an embodiment of the present application;
FIG. 44 is a schematic view of the second glue material 500 being exposed according to an embodiment of the present application;
FIG. 45 shows a semi-finished state after pre-curing is completed in one embodiment of the present application;
FIG. 46A shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application;
FIG. 46B shows the first lens 101 in yet another embodiment of the present application;
FIG. 47 is a schematic diagram illustrating a first piece of glue drawn on a top surface of a structured area of a second lens component in another embodiment of the present application;
FIG. 48 illustrates an embodiment of the present application in which the first glue material is applied in a glue pattern of broken glue;
FIG. 49 shows a jaw arrangement corresponding to the glue pattern shown in FIG. 48;
fig. 50 shows an example in which the first barrel interferes with the first lens;
fig. 51 shows an example of avoiding interference of the first barrel with the first lens by making a difference between the included angle B and the included angle a smaller than a preset threshold;
FIG. 52 shows a schematic view of a top surface of a first structural region configured as an inclined surface in one embodiment of the present application;
FIG. 53A illustrates relative position adjustment in active calibration in one embodiment of the present application;
FIG. 53B illustrates rotational adjustment in active calibration of another embodiment of the present application;
fig. 53C shows a relative position adjustment with the addition of v, w direction adjustments in the active calibration of yet another 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 the expressions first, second, etc. in this specification are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, a first body discussed below may also be referred to as a second body without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, 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 "substantially," "about," and the like are used as terms of table approximation and not as terms of table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by those 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. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 shows a schematic cross-sectional view of an optical lens 1000 according to an embodiment of the present application. As shown in fig. 1, the optical lens 1000 includes a first lens part 100, a second lens part 200, and a first plastic 300. The first lens component 100 includes a first barrel 110 and a first lens 120 mounted in the first barrel 110. The second lens part 200 includes a second barrel 210 and five second lenses 220 mounted on the second barrel 210. The second lens 230 at the bottom includes an optical area 240 for imaging and a structural area 250 outside the optical area 240, and a top surface of the structural area 250 bears against and is bonded to a bottom surface of the second barrel 210, so that an outer side surface of the second lens 230 at the bottom is entirely exposed outside the second barrel 210. Fig. 2 shows a perspective view of the bottommost second lens 230 in an embodiment of the present application. The five second lenses 220 and the first lens 120 together form an imaging optical system. The first glue 300 may be disposed between the first lens component 100 and the second lens component 200. For example, there is a gap between the first lens part 100 and the second lens part 200 in a direction along the optical axis, and the first rubber 300 is located in the gap. The first glue 300 is adapted to secure the first lens component 100 and the second lens component 200 together. For example, the first plastic 300 is adapted to support and fix the first lens component 100 and the second lens component 200, and to maintain the relative positions of the first lens component 100 and the second lens component 200 at the relative positions determined by the active calibration. The active calibration is to calibrate the relative positions of the first lens component 100 and the second lens component 200 based on the actual image-forming measured actual image-forming force curve of the optical system (i.e. the five second lenses 220 and the one first lens 120 together form the imageable optical system), so as to improve the imaging quality of the optical lens.
Further, fig. 3 shows a schematic cross-sectional view of the bottommost second lens 230 in an embodiment of the present application. Referring to fig. 3, in this embodiment, a light shielding layer 260 may be formed on the outer side surface 230A of the bottommost second lens 230. The light shielding layer 260 may be formed by screen printing a light shielding material on the side surface 230A of the lowermost second lens 230. In another embodiment, the outer side surface 230A of the bottommost second lens 230 and the bottom surface 230B of the structural region 250 can both form the light shielding layer 260. The light shielding layer 260 may be formed by printing a light shielding material on the side surface 230A of the bottommost second lens 230 and the bottom surface 230B of the structural region 250 of the second lens through a screen printing process.
The embodiment can effectively reduce the size of the optical lens in the direction vertical to the optical axis on the premise of established optical design, and can also ensure the imaging quality of the optical lens.
In contrast, prior art optical lenses are typically monolithic lenses. In a comparative example, an optical lens manufacturing method is: preparing a lens barrel with a step-shaped bearing surface on the inner side in advance, and then embedding each lens from small to large into the lens barrel one by one and bearing against the corresponding step-shaped bearing surface to obtain a complete optical lens. In such an optical lens, the lens barrel needs to surround the largest lens at the bottom end, and the lens barrel needs to have a sufficient thickness to form a rigid support for the bottom end lens, which results in that the thickness of the lens barrel cannot be reduced infinitely.
In the above embodiments of the present application, the top surface of the structure region of the second lens at the bottom end is supported and bonded to the bottom surface of the second lens barrel. In this embodiment, since the outer side surface of the second lens at the lowermost end is exposed to the outside of the inner side surface of the lens barrel, the outer diameter of the lens barrel can be designed based on the size of the second lens at the lowermost end, which reduces the size of the lens barrel in the direction perpendicular to the optical axis compared to the aforementioned comparative example. On the other hand, regarding the manufacturing error of the second lens part, such as the assembly error caused by the step of adhering and fixing the bottommost second lens to the bottom surface of the second lens barrel, the above-mentioned embodiments of the present application may compensate by adjusting the relative positions of the first lens part and the second lens part based on active calibration, thereby obtaining high imaging quality.
Further, fig. 4 shows a schematic top view of the bottommost second lens 230 according to an embodiment of the present application, and fig. 5 shows a schematic bottom view of the second barrel 210 corresponding to fig. 4. Referring to fig. 4 and 5, in the present embodiment, the structural region 250 may include a bonding region 252 and a transition region 251. The bottom surface 210A of the second barrel 210 is bonded to the bonding area 252 of the bottommost second lens 230. Fig. 6 is a schematic cross-sectional view illustrating an optical lens in an embodiment of the present application after the bottom surface 210A of the second barrel 210 is bonded to the bottommost second lens 230. The bottom surface 210A of the second barrel and the top surface of the bonding area 252 of the bottommost second lens 230 are supported and bonded to each other by the bonding glue 270. Note that, for simplicity of illustration, only the bottom surface 210A of the second barrel is shown in fig. 5, and the steps inside the second barrel 210 for bearing the rest of the second lenses are not shown (the rest of the second lenses refer to the rest of the second lenses inside the second barrel 210 for bearing the rest of the second lenses except for the bottommost second lens).
Further, fig. 7 shows a schematic top view of the bottommost second lens 230 of another embodiment of the present application. Referring to fig. 7, in the present embodiment, in the second lens part, the second lens 230 at the lowermost end has an extension 253 formed to extend outward from a side surface thereof in a direction perpendicular to an axis thereof. Further, fig. 8A shows a schematic bottom view of the second barrel 210 corresponding to fig. 7, fig. 8B shows a schematic cross-sectional view of the second barrel 210 taken along a section line a-a' shown in fig. 8A, and fig. 8C shows a schematic view of the bottommost second lens 230 embedded in the second barrel 210 shown in fig. 8B. Referring to fig. 8A-C, the bottom surface 210A of the second barrel has a groove 280 and the extension 253 is embedded in the groove 280, so as to improve the connection strength between the bottommost second lens and the second barrel. As shown in fig. 7, the second lens 230 at the bottom includes an optical zone 240 for imaging and a structural zone 250 outside the optical zone 240, and the extension 253 is located in the structural zone 250. Further, the second lens 230 at the bottom end can be fixed with the second barrel 210 by the second glue 270 between the extension 253 and the groove 280. In this embodiment, the number of the extending portions 253 may be two, and the number of the corresponding grooves 280 on the bottom surface 210A of the second barrel is also two. Of course, in other embodiments of the present application, the number of the extending portions may also be other numbers, such as three, four, five, six, etc., and correspondingly, the number of the corresponding grooves of the bottom surface of the second barrel may also be three, four, five, six, etc. It should be noted that, regarding the manufacturing tolerance of the second lens component, for example, the assembly tolerance (or referred to as assembly error) caused by the second lens at the bottom end being embedded and fixed in the groove of the bottom surface of the second lens barrel, the present embodiment may compensate by adjusting the relative positions of the first lens component and the second lens component based on active calibration, so as to obtain high imaging quality. In particular, in the present embodiment, in order to ensure the installation accuracy of the extension portion and the corresponding groove, there is little adjustable amount in design, that is, the relative position of the second lens at the bottom end and the second lens barrel is substantially determined by the positions of the extension portion and the corresponding groove, so that assembly tolerance may be brought when the second lens at the bottom end and the second lens barrel are assembled. However, such assembly tolerances can be compensated for by adjusting the relative positions of the first lens component and the second lens component during the active calibration phase. For example, the first lens part may be rotated relative to the second lens part (e.g., referring to rotation about the optical axis of the optical lens) during the active calibration phase to compensate for assembly tolerances due to the bottommost second lens being unable to rotate relative to the second barrel (e.g., referring to rotation about the optical axis of the optical lens).
Further, still referring to fig. 7, in one embodiment, the second lens 230 at the bottom most end has a transition zone 251 located in the structured zone 250 between the optical zone 240 and the extension 253. The embodiment can help to enhance the structural strength of the optical lens and guarantee the reliability of the optical lens while reducing the size of the lens barrel in the direction perpendicular to the optical axis.
Further, fig. 9 shows a schematic top view of the bottommost second lens 230 according to another embodiment of the present application, and fig. 10 shows a schematic bottom view of the second barrel 210 according to another embodiment of the present application. Referring to fig. 9 and 10, in this embodiment, the areas of the bottommost second lens 230 other than the extension portion 253 are the optical zone 240, that is, the outer side 240A of the optical zone 240 of the bottommost second lens 230 abuts against the inner side 210B of the second barrel. The present embodiment can reduce the size of the lens barrel in the direction perpendicular to the optical axis to the maximum extent on the premise of optical design.
Further, in an embodiment, a light shielding layer may be formed on an outer side surface of the extending portion of the bottommost second lens. The light shielding layer may be formed by screen printing a light shielding material on an outer side surface of the extension portion. In another embodiment, the outer side surface and the bottom surface of the bottommost second lens can form a light shielding layer (see fig. 3). The shading layer can print shading materials on the outer side surface and the bottom surface of the second lens at the bottommost end through a screen printing process.
It should be noted that in the above embodiments, the number of lenses of the first lens component 100 and the second lens component 200 can be adjusted as required. For example, the number of lenses of the first lens part 100 and the second lens part 200 may be two and four, three and three, four and two, and five and one, respectively. The total number of lenses of the whole optical lens can also be adjusted according to needs, for example, the total number of lenses of the optical lens can be six, and also can be five or seven.
It should also be noted that the optical lens and the lens components of the present application are not limited to two, and for example, the number of the lens components may also be three or four, etc. which is greater than two. When the number of lens components constituting the optical lens is more than two, the adjacent two lens components may be regarded as the aforementioned first lens component 100 and the aforementioned second lens component 200, respectively. For example, when the number of lens components of the optical lens is three, the optical lens may include two first lens components 100 and one second lens component 200 located between the two first lens components 100, and all first lenses of the two first lens components 100 and all second lenses of the one second lens component 200 together constitute an imageable optical system that performs active calibration. When the number of lens components of the optical lens is four, the optical lens may include two first lens components 100 and two second lens components 200, and the first lens components 100, the second lens components 200, the first lens components 100, and the second lens components 200 are arranged in order from top to bottom, and all first lenses of the two first lens components 100 and all second lenses of the two second lens components 200 together constitute an imageable optical system that performs active calibration. Other variations such as this are not described in detail herein.
Further, in another embodiment of the present application, a camera module based on the optical lens is further provided. The camera module comprises an optical lens and a photosensitive assembly. Wherein the optical lens may be the optical lens in any of the embodiments described above. This embodiment can reduce the module of making a video recording in the ascending size of perpendicular to optical axis direction effectively, can also guarantee the formation of image quality of the module of making a video recording simultaneously. The camera module may also include a motor (or other type of optical actuator), and the optical lens may be mounted within a cylindrical carrier of the motor, the base of which is mounted to the top surface of the photosensitive assembly. The photosensitive member may include, for example, a wiring board, a photosensitive chip mounted on a surface of the wiring board, a ring-shaped support formed on or mounted on the surface of the wiring board and surrounding the photosensitive chip, and a color filter. The ring support may form a step, and the color filter is mounted on the step of the ring support. The base of the motor is mounted on the top surface of the ring-shaped support body.
Further, according to an embodiment of the present application, there is provided an optical lens assembling method including:
step 10, preparing a first lens component 100 and a second lens component 200 separated from each other, wherein the first lens component 100 includes a first barrel 110 and at least one first lens mounted in the first barrel 110, and the second lens component 200 includes a second barrel 210 and at least one second lens mounted in the second barrel 210. In this embodiment, the number of the first lenses is one. The number of second lenses is five.
Fig. 11A-B illustrate a process of assembling the first lens component 100 in one embodiment of the present application. Wherein the assembly process of the first lens component 100 includes: as shown in fig. 11A, the first barrel 110 is inverted, and the first lens 120 is inserted into the step 110A which makes it lean against the inner side of the first barrel 110; as shown in fig. 11B, a glue (e.g., an adhesive 110C) is dispensed in a gap (which may be an annular gap) between the inner surface 110B of the first barrel 110 and the outer surface 120A of the first lens, so as to fix the first lens 120 to the inner surface 110B of the first barrel. Fig. 12A-D illustrate a process of assembling the second lens component 200 in one embodiment of the present application. The assembly process of the second lens component 200 includes: as shown in fig. 12A and 12B, the second barrel 210 is inverted, and the four second lenses 220 are embedded into the steps 210C of each stage inside the second barrel 210 one by one from small to large (the process of embedding one by one can be completed by the same process as the prior art); as shown in fig. 12C and 12D, a fifth second lens 230 (i.e., the last second lens) is attached to the surface 210A of the second barrel by dispensing on the surface 210A of the second barrel.
In another embodiment, the fifth second lens may have an extension, and the bottom surface of the second barrel may have a matching groove. When the second lens part is assembled, the first four second lenses are still embedded into the second lens barrel one by one, and then the extension parts of the fifth second lens are embedded into the adaptive grooves of the second lens barrel (see fig. 8C). The groove and the extension part can be bonded by glue.
Step 20, pre-positioning the first lens part 100 and the second lens part 200, so that the at least one second lens and the at least one first lens 120 together form an imaging optical system.
Step 30, adjusting and determining the relative position of said first lens component 100 and said second lens component 200 based on active calibration.
And 40, bonding the first lens part 100 and the second lens part 200 through a rubber material. In this step, the first lens component 100 and the second lens component 200 are supported and fixed by a cured rubber material, so that the relative positions of the first lens component 100 and the second lens component 200 are maintained at the relative positions determined by the active calibration.
Further, fig. 13A-13B illustrate the active alignment and bonding process of one embodiment of the present application. In one embodiment, before step 30 is performed, a glue 300 may be applied to the gap between the first lens component 100 and the second lens component 200 (as shown in fig. 13A), and then step 30 is performed to adjust and determine the relative positions of the first lens component 100 and the second lens component 200. After determining the relative position, step 40 is performed to cure the rubber material 300, so that the cured rubber material 300 is used to support the first lens component 100 and the second lens component 200, and further the relative position of the first lens component 100 and the second lens component 200 is maintained at the relative position determined by the active calibration (as shown in fig. 13B). In yet another embodiment, step 30 may be performed first to adjust and determine the relative positions of the first lens component 100 and the second lens component 200. After the relative position is determined, the first lens component 100 (or the second lens component 200) is temporarily moved away, then the glue coating is performed, and the first lens component 100 (or the second lens component 200) is moved back based on the determined relative position. Finally, the glue material is cured, so that the relative positions of the first lens component 100 and the second lens component 200 are kept at the relative positions determined by the active calibration.
Further, the active calibration described herein may adjust the relative positions of the first lens component 100 and the second lens component 200 in multiple degrees of freedom. FIG. 14A illustrates a relative position adjustment in active calibration in one embodiment of the present application. In this adjustment manner, the first lens part 100 (or the first lens 120) can move along the x, y, and z directions relative to the second lens part 200 (i.e., the relative position adjustment in this embodiment has three degrees of freedom). Where the z-direction is the direction along the optical axis and the x, y-directions are the directions perpendicular to the optical axis. The x, y directions both lie in a tuning plane P within which translation can be resolved into two components in the x, y directions.
FIG. 14B illustrates rotational adjustment in active calibration of another embodiment of the present application. In this embodiment, the relative position adjustment has an increased rotational degree of freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 14A. In the present embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, i.e. a rotation around an axis perpendicular to the adjustment plane P.
Further, fig. 14C shows a relative position adjustment manner with v and w direction adjustments added in the active calibration of yet another embodiment of the present application. Where 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 may be combined into a vector angle representing the total tilt state. That is, by the v-direction and w-direction adjustment, the tilt posture of the first lens component 100 with respect to the second lens component 200 (i.e., the tilt of the optical axis of the first lens component 100 with respect to the optical axis of the second lens component 200) can be adjusted.
The adjustment of the above-mentioned six degrees of freedom, x, y, z, r, v, and w, may affect the imaging quality of the optical system (e.g., affect the magnitude of the resolution). In other embodiments of the present application, the relative position adjustment may be performed by adjusting only any one of the six degrees of freedom, or by a combination of any two or more of the six degrees of freedom.
Further, in an embodiment, in the active calibration step, the movement further comprises a translation in the adjustment plane, i.e. a movement in the x, y direction.
Further, in one embodiment, the active calibration further comprises: and adjusting and determining the included angle of the axis of the first lens component 100 relative to the axis of the second lens component 200, namely the adjustment in the w and v directions according to the measured resolution force of the optical system. In the assembled optical lens or camera module, an included angle between the axis of the first lens component 100 and the axis of the second lens component 200 may be different from zero.
Further, in one embodiment, the active calibration further comprises: the first lens part is moved in a direction perpendicular to the adjustment plane (i.e. adjustment in z-direction), and the relative position between the first lens part and the second lens part in the direction perpendicular to the adjustment plane is determined based on the measured resolution of the optical system (which refers to the measured resolution based on the actual imaging result of the optical system).
Further, in one embodiment, in the pre-positioning step (step 20), a gap is provided between the bottom surface of the first lens component and the top surface of the second lens component; and in the step of bonding (step 40), the adhesive material is disposed in the gap.
Further, in one embodiment, in the preparing step (step 10), the first lens part may not have the first barrel. For example, the first lens component may be constituted by a single first lens. In the pre-positioning step (step 20), a gap is formed between the bottom surface of the first lens and the top surface of the second lens component; and in the step of bonding (step 40), disposing the adhesive material in the gap. In this embodiment, the first lens may be formed by a plurality of sub-lenses which are integrally fitted to each other. In this embodiment, the side surfaces and the top surface of the non-optical surface of the first lens not used for imaging may be formed with a light shielding layer. The light shielding layer may be formed by screen printing a light shielding material on the side surfaces and the top surface of the first lens.
In one embodiment, in the active calibration step, the second lens component may be fixed, the first lens component may be held by a clamp, and the first lens component may be moved by a six-axis movement mechanism connected to the clamp, so as to realize the relative movement between the first lens component and the second lens component in the above six degrees of freedom. Wherein the clamp can bear against or partially bear against a side surface of the first lens component to clamp the first lens component.
Further, in one embodiment, step 30 may be performed after a glue material is coated on a gap between the first lens component and the second lens component before step 30 is performed, so as to adjust and determine the relative positions of the first lens component and the second lens component. After determining the relative position, step 40 is performed to cure the glue material, so that the first lens component and the second lens component are supported by the cured glue material, and the relative position of the first lens component and the second lens component is maintained at the relative position determined by the active calibration. In yet another embodiment, step 30 may be performed first to adjust and determine the relative positions of the first lens component and the second lens component. After the relative position is determined, the first lens component (or the second lens component) is temporarily moved away, then the glue material coating is carried out, and the first lens component (or the second lens component) is moved back based on the determined relative position. And finally, curing the rubber material to keep the relative positions of the first lens component and the second lens component at the relative positions determined by the active calibration.
In one embodiment, the adhesive material may be a UV thermosetting adhesive, in step 40, the second lens component is fixed on a platform, the first lens component is captured by a capturing mechanism (e.g. a clamp), the relative position of the first lens component and the second lens component is maintained at the relative position determined by the active calibration, then the UV thermosetting adhesive is pre-cured by exposing the UV thermosetting adhesive, then the capturing mechanism (e.g. the clamp) is released, the first lens component and the second lens component are maintained at the relative position determined by the active calibration due to the pre-cured adhesive material supporting the first lens component and the second lens component, and then the first lens component and the second lens component combined together are baked to permanently cure the UV thermosetting adhesive, so as to obtain the finished optical lens. In another embodiment, the adhesive material may also include thermosetting adhesive and light-curing adhesive (e.g., UV adhesive), and the optical lens finished product is obtained by pre-curing the thermosetting adhesive through exposure to light and then baking the first lens part and the second lens part which are combined together to permanently cure the thermosetting adhesive.
Further, according to an embodiment of the present application, there is also provided a camera module assembling method, including: the optical lens assembly method of any one of the embodiments is used to assemble the optical lens, and then the assembled optical lens is used to manufacture the camera module.
Further, according to another embodiment of the present application, there is provided another camera module assembling method, including:
step 100, preparing a first lens component and a camera module component, wherein the camera module component comprises a second lens component and a photosensitive module which are combined together, the first lens component comprises a first lens barrel and at least one first lens arranged in the first lens barrel, and the second lens component comprises a second lens barrel and at least one second lens arranged in the second lens barrel. In this embodiment, the number of the first lenses is one. The number of second lenses is five.
In one embodiment, the first lens component and the second lens component are assembled separately. Wherein the assembly process of the first lens component comprises: the first lens barrel is inverted, and the first lens is embedded into a step which makes the first lens lean against the inner side of the first lens barrel; and dispensing in a gap (which may be an annular gap) between the inner side surface of the first lens barrel and the outer side surface of the first lens to fix the first lens inside the first lens barrel. The assembly process of the second lens component includes: the second lens barrel is inverted, and the four second lenses are embedded into each step on the inner side of the second lens barrel from small to large one by one (the process of embedding one by one can be completed by adopting the same process as the prior art); and dispensing glue on the surface of the second lens barrel, and attaching five second lenses (namely the last second lens) on the surface of the second lens barrel. After the second lens component is assembled, the second lens component and the photosensitive module are mounted together (for example, the second lens component may be mounted based on an HA process) to obtain the image pickup module component.
In another embodiment, the fifth second lens may have an extension, and the bottom surface of the second barrel may have a matching groove. When the second lens component is assembled, the first four second lenses are still embedded into the second lens barrel one by one, and then the extension parts of the fifth second lenses are embedded into the matched grooves of the second lens barrel. The groove 280 and the extension may be bonded together with glue.
Step 200, 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 jointly form an imaging optical system.
Step 300, adjusting and determining the relative position of the first lens component and the second lens component based on active calibration.
Step 400, bonding the first lens part and the second lens part through a glue material.
It can be seen that, compared with the previous embodiment, the second lens component and the photosensitive module in this embodiment are assembled together to form the image pickup module component, and then the image pickup module component is assembled with the first lens component to obtain the complete image pickup module. The assembly process of the camera module component and the first lens component may also have various modifications, for example, the assembly of the camera module component and the first lens component may be implemented with reference to the embodiments of the optical lens assembly method described above.
Further, in one embodiment, the second lens at the bottom-most end may have an extension, and the extension may be widened based on the extension shown in fig. 7. Figure 15 illustrates a top view of the bottom most second lens of an embodiment of the present application. Referring to fig. 15, it can be seen that the distance between the two sides 2531, 2532 of the extension 253 in this embodiment is equal to the diameter of the transition zone 251. Thus, when the second lens at the bottom end is manufactured, the required extension 253 can be manufactured by only two times of cutting, and the cutting surfaces 2533 of the two times of cutting are both flat surfaces. Therefore, the difficulty in manufacturing the second lens at the bottommost end can be reduced, and the production efficiency is improved. In one embodiment, when manufacturing the second lens at the bottom end as shown in fig. 15, a lens semi-finished product may be manufactured first, the diameter of the outer side surface of the structural area of the lens semi-finished product is consistent with the diameter of the outer side surface of the bottom surface of the second barrel, then the annular structural area of the lens semi-finished product is cut twice at symmetrical positions, the cutting surface 2533 of the annular structural area of the lens semi-finished product has a necessary safety distance D from the optical area 240 of the lens semi-finished product, and the cutting surfaces of the two times of cutting are both planar and parallel to each other, and the distance from the cutting surface to the optical axis is the radius of a circular boundary line (shown as a dotted line in fig. 15) between the. After the cutting is completed, the second lens at the bottom end as shown in fig. 15 is obtained. That is, in this embodiment, the width of the transition zone may be a safe distance to avoid damage to the optical zone from the cutting action. Accordingly, the groove of the bottom surface of the second barrel in the present embodiment is fitted with the extension portion shown in fig. 15. In this embodiment, the inner side surface of the protruding portion at the bottom of the second barrel may be a plane surface to match with the cutting surface shown in fig. 15 and to lean against each other, so as to improve the stability and reliability of assembling the second lens with the second barrel. The second lens with the extension part of the embodiment has a simple manufacturing process, and can improve the production efficiency. On the other hand, the width of the transition region of the present embodiment can be reduced to be small (only a small necessary safety distance for avoiding the damage of the cutting action to the optical region is required), which is very helpful for reducing the dimension of the second barrel in the direction perpendicular to the optical axis, and can also ensure the yield required by mass production.
Fig. 16 shows a schematic cross-sectional view of an optical lens of an embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the optical lens includes a first lens component 100, a second lens component 200, and a first plastic 300. The first lens component 100 comprises a first lens barrel 102 and a first lens mounted in the first lens barrel 102, and the first lens barrel 102 and the first lens 101 are optionally connected by using an adhesive 103; a second lens component 200, including a second barrel 202 and four second lenses 201 installed in the second barrel 202, where the four second lenses 201 and the first lens 101 together constitute an imageable optical system, and the first barrel 102 is made of a material different from that of the second barrel 202; and a first glue 300 located in a first gap 400 between the first lens part 100 and the second lens part 200, the first glue 300 being adapted to support and fix the first lens 101 and the second lens part 200 after curing. In this embodiment, the first lens barrel 102 and the second lens barrel 202 are optionally connected by a first glue 300 to achieve the connection of the first lens part 100 and the second lens part 200. The first glue 300 may be adapted to support and fix the first lens 101 and the second lens part 200, so that the relative position of the first lens 101 and the second lens part 200 is maintained at the relative position determined by the active calibration. The difference between the thermal expansion coefficient of the first barrel 102 and the thermal expansion coefficient of the first lens 101 may be smaller than a first threshold. In this embodiment, the material for manufacturing the first barrel 102 is different from the second barrel 202, and the difference between the thermal expansion coefficient and the thermal expansion coefficient of the first lens 101 is smaller than the first threshold, the technical solution enables the thermal expansion coefficients of the first barrel 102 and the first lens 101 to be substantially consistent, thereby helping to reduce the difference between the optical system state after the first adhesive material 300 is cured and the optical system state determined by the active calibration, and further ensuring the imaging quality of the lens or the module. In this embodiment, the first lens 101 and the first lens barrel 102 have approximately the same variation condition, and further have the same variation degree under the same condition, so as to reduce the variation of the relative position, reduce the relative stress of the first lens 101 and the first lens barrel 102, and avoid the weakening of the structural strength. Meanwhile, when the variation occurs, the first lens 101 and the first barrel 102 may have the same or similar variation amount, and the degradation of the optical system caused by the variation can also be reduced. Illustratively, since the first barrel 102 is ring-shaped, when the first barrel 102 expands due to heat, the inner side surface thereof will expand from the outside to the inside. At the same time, the outer side of the first lens 101 is heated and expands from the inside to the outside. Because the thermal expansion coefficient of the first barrel 102 is close to that of the first lens 101 (the difference between the two is controlled within the first threshold), the outward-inward expansion amount of the inner side surface of the first barrel 102 is close to the inward-outward expansion amount of the outer side surface of the first lens 101, and therefore the two expansion amounts can be mutually reduced (or eliminated), so that the deformation of the first lens component caused by heating (for example, baking) is reduced, the difference between the optical system state determined by active calibration and the optical system state after the first rubber material 300 is cured is favorably reduced, and the imaging quality of the lens or the module is further ensured.
In another embodiment, the first barrel 102 is made of a material having a lower moisture absorption rate than the second barrel 202. Herein, the moisture absorption rate may also be understood as a water absorption rate. In this embodiment, the moisture absorption rate of the material of the first barrel 102 may be smaller than the corresponding threshold, so as to reduce the shape variation or the position deviation of the first barrel 102 caused by moisture accumulation, thereby helping to reduce the difference between the optical system state after the first adhesive material 300 is cured and the optical system state determined by the active calibration, and further ensuring the imaging quality of the lens or the module. While the material of the second barrel 202 is still made of a conventional material, such as Polycarbonate (PC). Thus, the second lens component can still be manufactured by adopting the traditional process, and the product yield is improved.
Further, in one embodiment, the first lens 101 is optionally a glass lens. Because the glass lens has high refractive index, help reducing the height of optical lens or the module of making a video recording. The first lens 101 made of glass material, for example, enables the height of the optical lens to be reduced, which is in line with the current trend of thinner mobile phones.
Further, in one embodiment, the first barrel 102 has elasticity to buffer the force of the external intake mechanism on the first lens 101. Here, the first barrel 102 has elasticity, which is understood to mean that the elastic modulus of the material of the first barrel is smaller than that of the first lens. A smaller elastic modulus of a material indicates that the material is more elastic. That is, the lower the elastic modulus, the greater the material deformation under the same stress condition, and the better the material is susceptible to deformation flexibility.
Further, in a preferred embodiment, the difference between the thermal expansion coefficient of the first barrel 102 and the thermal expansion coefficient of the first lens 101 is smaller than a first threshold, and the moisture absorption rate of the first barrel 102 is smaller than the moisture absorption rate of the second barrel 202.
Further, in a preferred embodiment, a difference between the thermal expansion coefficient of the first barrel 102 and the thermal expansion coefficient of the first lens 101 is smaller than a first threshold, and the moisture absorption rate of the first barrel 102 is smaller than the moisture absorption rate of the second barrel 202, and the material of the first barrel 102 further has elasticity for buffering the acting force of the external intake mechanism on the first lens 101. In this embodiment, the first barrel 102 having elasticity is located between the first lens 101 and the external capturing mechanism, and when the external capturing mechanism moves the first lens 101, it can play a role of buffering, so as to suppress deformation of the optical surface of the first lens 101 due to clamping by the external capturing mechanism.
On the basis of the above embodiment, further, the number of the first lens 101 may be smaller than the number of the second lens 201, and the second lens 201 is closer to the photosensitive chip than the first lens 101. Further, in one embodiment, the number of the first lenses 101 is one, and the outer diameter of the first lenses 101 is larger than the second lens 201 with the smallest outer diameter. In this embodiment, the outer diameter of the first lens 101 is larger than the outer diameter of the smallest second lens 201, and this solution is adopted because the first barrel 102 is made of an unconventional material, and additional tolerance may be introduced. Therefore, the number of the first lenses 101 is reduced, the first lenses 101 with larger size are designed, and the like, so as to reduce the assembly tolerance (because generally, the smaller and more compact the lens is, the more difficult the tolerance is to be controlled), and the assembly tolerance is compensated by the active calibration technique, thereby ensuring the whole imaging quality of the optical lens or the module.
Further, in some embodiments, the second barrel 202 may be made of a conventional material, such as a Polycarbonate (PC) material. Therefore, the second lens part can still be manufactured by adopting the traditional process, which is beneficial to improving the product yield and the production efficiency.
Further, fig. 17 shows a schematic cross-sectional view of an optical lens of another embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the first adhesive material 300 is located between the first lens 101 and the second lens barrel 202, and no filler is located between the first lens barrel 102 and the second lens barrel 202. Different from fig. 16, the first rubber 300 is located between the first barrel 102 and the second barrel 202, but between the first lens 101 and the second barrel 202. The present embodiment can help the optical system status of the finished optical lens (or camera module) to be closer to the status determined in the active calibration stage, for the following reasons: in the active calibration stage, the external fixture captures and moves the first lens component 100 by holding the first lens barrel 102, and although the elastic first lens barrel 102 can buffer the acting force of the fixture on the first lens 101, the first lens 101 is prevented from deforming, and thus the optical system states of the active calibration stage (at this time, the first lens component 100 is held by the fixture) and the stage after the first rubber 300 is cured (at this time, the first lens component 100 is not held by the fixture) are prevented from being inconsistent. Further, the deformation of the elastic first barrel 102 may affect the state of the optical system, and the first lens 101 and the second barrel 202 are connected by the first adhesive 300, so that the defect can be effectively avoided.
Further, fig. 18 shows a schematic cross-sectional view of an optical lens according to still another embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. The present embodiment is substantially the same as the embodiment of fig. 16, except that the first rubber material 300 is located between the first barrel 102 and the second barrel 202 and between the first lens 101 and the second barrel 202.
Further, in another embodiment of the present application, a camera module based on the optical lens is further provided. The camera module comprises an optical lens and a photosensitive assembly. Wherein the optical lens may be the optical lens in any of the embodiments described above. The secondary variation of the optical system of the camera module after the active calibration is completed can be reduced, so that the imaging quality of the camera module is guaranteed, and the yield of mass production is improved. In some embodiments, the camera module may further include a motor (or other type of optical actuator), and the optical lens may be mounted within a cylindrical carrier of the motor, the base of the motor being mounted to the top surface of the photosensitive assembly. The photosensitive member may include, for example, a wiring board, a photosensitive chip mounted on a surface of the wiring board, a ring-shaped support formed on or mounted on the surface of the wiring board and surrounding the photosensitive chip, and a color filter. The ring support may form a step, and the color filter is mounted on the step of the ring support. The base of the motor is mounted on the top surface of the ring-shaped support body.
There is also provided, in accordance with an embodiment of the present application, an optical lens assembly method, including:
step S10, a preparation step. The first lens component 100 and the second lens component 200 are prepared separately from each other. The first lens component 100 comprises a first lens barrel 102 and a first lens 101 mounted in the first lens barrel 102; the second lens component 200 includes a second barrel 202 and four second lenses 201 installed in the second barrel 202, the four second lenses 201 and the first lens 101 together constitute an imageable optical system, and the first barrel 102 is made of a material different from that of the second barrel 202.
Step S20, pre-positioning step. The first lens part 100 and the second lens part 200 are pre-positioned, so that the first lens 101 and the at least one second lens 201 together form an imageable optical system.
Step S30, active calibration step. The relative positions of the first lens component 100 and the second lens component 200 are adjusted and determined based on active calibration.
Step S40, a bonding step. The first lens part 100 and the second lens part 200 are bonded by a first adhesive material 300. The first glue 300 is located in the gap between the first lens component 100 and the second lens component 200. After the first rubber material 300 is cured, the first lens component 100 and the second lens component 200 are fixed and kept at the relative positions determined by the active calibration.
In this embodiment, the first lens 101 can be protected by selecting a suitable material of the first barrel 102, so as to reduce the occurrence of secondary variation in the shape and position of the first lens 101 after the active calibration is completed. Specifically, quadratic variation refers to the change in the optical system after bake cure relative to the optical system determined by active alignment.
Further, the active calibration described herein may adjust the relative positions of the first lens component 100 and the second lens component 200 in multiple degrees of freedom. Fig. 21A illustrates a relative position adjustment manner in active calibration in an embodiment of the present application. In this adjustment manner, the first lens part 100 (or the first lens 101) can move along the x, y, and z directions relative to the second lens part 200 (i.e., the relative position adjustment in this embodiment has three degrees of freedom). Where the z-direction is the direction along the optical axis and the x, y-directions are the directions perpendicular to the optical axis. The x, y directions both lie in a tuning plane P within which translation can be resolved into two components in the x, y directions.
FIG. 21B illustrates rotational adjustment in active calibration of another embodiment of the present application. In this embodiment, the relative position adjustment has an increased rotational degree of freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 21A. In the present embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, i.e. a rotation around an axis perpendicular to the adjustment plane P.
Further, fig. 21C shows a relative position adjustment manner with v and w direction adjustments added in the active calibration of yet another embodiment of the present application. Where 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 may be combined into a vector angle representing the total tilt state. That is, by the v-direction and w-direction adjustment, the tilt posture of the first lens component 100 with respect to the second lens component 200 (i.e., the tilt of the optical axis of the first lens component 100 with respect to the optical axis of the second lens component 200) can be adjusted.
The adjustment of the above-mentioned six degrees of freedom x, y, z, r, v, and w may affect the imaging quality of the optical system (e.g., affect the magnitude of the resolution). In other embodiments of the present application, the relative position adjustment may be performed by adjusting only any one of the six degrees of freedom, or by a combination of any two or more of the six degrees of freedom.
Further, in an embodiment, in the active calibration step, the movement further comprises a translation in the adjustment plane, i.e. a movement in the x, y direction.
Further, in one embodiment, the active calibration further comprises: and adjusting and determining the included angle of the axis of the first lens component 100 relative to the axis of the second lens component 200, namely the adjustment in the w and v directions according to the measured resolution force of the optical system. In the assembled optical lens or camera module, an included angle between the axis of the first lens component 100 and the axis of the second lens component 200 may be different from zero.
Further, in one embodiment, the active calibration further comprises: moving the first lens component 100 in a direction perpendicular to the adjustment plane (i.e. adjustment in z-direction), the relative position between the first lens component 100 and the second lens component 200 in the direction perpendicular to the adjustment plane is determined from the measured resolving power of the optical system.
Further, in one embodiment, in the pre-positioning step, a gap is provided between the bottom surface of the first lens component 100 and the top surface of the second lens component 200; and in the bonding step, the adhesive material is arranged in the gap.
In one embodiment, in the active calibration step, the second lens component 200 may be fixed, the first lens component 100 may be held by a clamp, and the first lens component 100 may be moved by a six-axis movement mechanism connected to the clamp, so as to achieve the above-mentioned relative movement between the first lens component 100 and the second lens component 200 in six degrees of freedom. Wherein the clip may bear against or partially bear against a side of the first lens component 100, thereby clipping the first lens component 100.
Further, fig. 19A to 19G illustrate an optical lens assembling method in one embodiment of the present application. Fig. 19A shows the first lens section 100 and the second lens section 200 in a separated state, and the arrow-indicating direction shows the moving direction of the first lens section 100. Fig. 19B shows a schematic diagram of pre-positioning and active calibration of the first lens component 100 and the second lens component 200. Specifically, the first lens part 100 and the second lens part 200 are pre-positioned, the first lens 101 and the four second lenses 201 together form an imaging optical system, six-axis coordinates of the first lens part 100 are adjusted by an external capturing mechanism, the actually measured imaging quality reaches the standard (for example, the actually measured resolution reaches a threshold), and then the six-axis coordinate position of the first lens part 100, at which the imaging quality reaches the standard, is recorded. Fig. 19C shows a schematic diagram of painting glue on the top surface of the second barrel 202 after active alignment. Specifically, after the active calibration is completed, the first lens component 100 is removed, and then a first rubber 300 is painted on the top surface of the second barrel 202 of the second lens component 200 for connecting the first lens component 100 and the second lens component 200, where an arrow indicates that the first lens component 100 is removed. Fig. 19D shows that after the first rubber material 300 is painted on the top surface of the second barrel 202 of the second lens component 200, the external capturing mechanism restores the first lens component 100 to the calibration position according to the six-axis coordinate position determined by the active calibration (i.e., the recorded six-axis coordinate position). Fig. 19E shows the pre-curing process. Specifically, after the first lens unit 100 is moved to the calibration position, the first rubber 300 is exposed to light, and the first rubber 300 is pre-cured, and the external capturing mechanism holds the first lens unit 100 at the calibration position during the exposure. The arrows in fig. 19E are used for the exposure light of the first adhesive material 300. Fig. 19F shows a state after the first rubber material 300 is cured. After exposure, the external taking mechanism is removed, and the first lens unit 100 is held in the calibration position by the support and fixation of the pre-cured first rubber 300. Fig. 19G shows a state after permanent curing. The optical lens pre-cured by the first adhesive material 300 is baked to realize permanent curing. In FIG. 19G, the first piece of glue 300 is baked to permanently attach the first lens component 100 to the second lens component 200 and remains in the active alignment position shown in FIG. 19B.
In this embodiment, the first glue material 300 is painted between the top surface of the second barrel 202 and the bottom surface of the first barrel 102, wherein a gap is maintained between the first lens 101 and the second barrel 202; optionally, the first adhesive material 300 may also be painted between the bottom surface of the first lens 101 and the top surface of the second barrel 202, wherein a gap is maintained between the first barrel 102 and the second barrel 202; optionally, the first adhesive material 300 may also be painted between the top surfaces of the first barrel 102 and the second barrel 202, and between the bottom surface of the first lens 101 and the top surface of the second barrel 202.
Further, fig. 20A to 20F illustrate an optical lens assembling method in another embodiment of the present application. Fig. 20A is a schematic diagram illustrating that the top surface of the second barrel 202 of the second lens component 200 has the first rubber 300, wherein the first rubber 300 is painted on the top surface of the second barrel 202 of the second lens component 200 for connecting the first lens component 100 and the second lens component 200. Fig. 20B is a schematic diagram illustrating that the first lens component 100 is clamped and moved for pre-positioning, wherein after the top surface of the second barrel 202 of the second lens component 200 is painted with the first plastic material 300, the first lens component 100 and the second lens component 200 are pre-positioned using active calibration, so that the first lens 101 and the at least one second lens 201 together form an imaging optical system, and the six-axis coordinates of the first lens component 100 are adjusted by an external capturing mechanism, so that the measured imaging quality reaches the standard (for example, the measured resolving power reaches a threshold), so that the first lens component 100 moves to the six-axis coordinate position where the imaging quality reaches the standard, and the direction indicated by the arrow indicates the moving direction of the first lens component 100. Fig. 20C shows a schematic diagram after the first lens component 100 is moved to the calibration position using active calibration, in which the first rubber 300 is contained between the first lens component 100 and the second lens component 200 and is held in the calibration position by an external capturing mechanism. Fig. 20D is a schematic diagram illustrating the exposure of the first rubber 300 to pre-cure, wherein after the first lens part 100 is moved to the first rubber 300 coated on the top surface of the second barrel 202 of the second lens part 200 and kept at the calibration position, the first rubber 300 is exposed to perform the pre-curing of the first rubber 300, so as to keep the first lens part 100 at the calibration position. Fig. 20E shows a state after the first rubber material 300 is cured. After the first plastic material 300 is exposed, the external capturing mechanism is moved away, and the first lens component 100 is kept at the calibration position. Fig. 20F shows a state after permanent curing. The optical lens pre-cured by the first adhesive material 300 is baked to realize permanent curing. In FIG. 20F, the first piece of glue 300 is baked to permanently attach the first lens component 100 to the second lens component 200 and remains in the active alignment position shown in FIG. 20C.
In this embodiment, the first glue material 300 is painted between the top surface of the second barrel 202 and the bottom surface of the first barrel 102, wherein a gap is maintained between the first lens 101 and the second barrel 202; optionally, the first adhesive material 300 may also be painted between the bottom surface of the first lens 101 and the top surface of the second barrel 202, wherein a gap is maintained between the first barrel 102 and the second barrel 202; optionally, the first adhesive material 300 may also be painted between the top surfaces of the first barrel 102 and the second barrel 202, and between the bottom surface of the first lens 101 and the top surface of the second barrel 202.
Further, according to an embodiment of the present application, there is also provided a camera module assembling method, including: the optical lens assembly method of any one of the embodiments is used to assemble the optical lens, and then the assembled optical lens is used to manufacture the camera module.
Further, applicants have further analyzed the thermal expansion coefficients, moisture absorption rates, and elastic moduli of various materials and have derived a series of preferred embodiments based on the analysis.
Wherein, the rate of moisture absorption may also be referred to as water absorption, which represents the ability of a material to absorb water at standard atmospheric pressure. The water absorption of some plastic materials is given in table 1.
TABLE 1
Figure PCTCN2019084449-APPB-000001
Figure PCTCN2019084449-APPB-000002
Referring to table 1, in some embodiments of the present application, the first barrel may employ a material having a water absorption rate of less than 0.3%, such AS LCP, FR-PET, PI, PBT, PE, PP, PPO, PEI, AS, or the like. In addition, since the water absorption rate of the metal material is usually less than 0.3%, the first barrel may be made of a metal material. The first lens barrel is made of a material with the water absorption rate of less than 0.3%, so that the shape variation or the position deviation of the first lens barrel caused by moisture accumulation can be reduced, the difference between the optical system state after the first glue material is cured and the optical system state determined by active calibration is favorably reduced, and the imaging quality of a lens or a module is further ensured. While the material of the second barrel 202 is still made of a conventional material, such as PC material. Therefore, the second lens part can still be manufactured by adopting the traditional process, which is beneficial to improving the product yield and the production efficiency.
Herein, the polymer material and the metal material concerned are both isotropic in the three-dimensional direction, and therefore both the thermal expansion coefficients are linear expansion coefficients.
In one embodiment of the present application, the first lens barrel may be made of a metal material, and the first lens barrel may be made of a glass material.
In general, the thermal expansion coefficient of a glass material is, for example: (5.8-150). times.10-7/℃。
The thermal expansion coefficients of some common industrial metal materials are as follows:
copper 1.7X 10-5/℃，
Aluminum: 2.3X 10-5/℃，
Iron: 1.2X 10-5/℃，
General carbon steel: 1.3X 10-5/℃。
The coefficient of thermal expansion of glass is smaller than that of plastic, and the coefficient of thermal expansion of metal lens barrel is generally smaller than that of plastic, so the matching of glass lens and metal lens barrel is helpful to reduce the deformation of the first lens component caused by heating (such as baking), and the shape variation or position deviation of the first lens barrel caused by moisture accumulation can also be reduced because the metal lens barrel has smaller water absorption.
Further, in a preferred embodiment of the present application, oxygen-free copper may be employed as the first barrel material. The thermal expansion coefficient of the oxygen-free copper is 1.86 multiplied by 10-7/° c, and high borosilicate glass was used as the first lens material. The coefficient of thermal expansion of high borosilicate glass is: (3.3. + -. 0.1). times.10-6V. C. The thermal expansion coefficients of the two materials are close to each other, so that the deformation of the first lens component caused by heating (such as baking) can be reduced, and the embodiment can also reduce the shape variation or position deviation of the first lens barrel caused by moisture accumulation because the water absorption rate of the oxygen-free copper is small. Therefore, the scheme of the embodiment is very helpful for reducing the difference between the optical system state after the first glue material is cured and the optical system state determined by the active calibration, thereby ensuring the imaging quality of the lens or the module.
In another embodiment of the present application, the first lens and the first barrel are both made of plastic materials. The first lens barrel can be made of first plastic, and the first lens can be made of second plastic. The first plastic andthe difference in the coefficients of thermal expansion of the second plastic is, for example, 4X 10-5Within/° c.
Materials of common plastic lenses include: PC or PMMA (polymethylmethacrylate), which is commonly known as plexiglass or acrylic.
Wherein, the thermal expansion coefficient of PMMA is as follows: 7X 10-5/℃，
The PC coefficient of thermal expansion is: (6.5-6.6) x 10-5/℃。
In some cases, the lens may be made of a resin material such as CR-39 (propylene-based diglycol carbonate, also called columbia resin or ADC resin) having a thermal expansion coefficient of: 9 to 10 x 10-5/℃。
Table 2 further shows the coefficient of thermal expansion of some plastics.
TABLE 2
Name of the Material Coefficient of linear expansion (DEG C ^ -1)
PE (Medium density) 10×10^-5
PC (5～7)×10＾-5
PBT 110^-5
PE (high density) 22×10^-5；
PPO(NORYL) 0.7×10＾-5
PP polypropylene (5.8～10.2)10＾-5
PEI 5.6×10＾-5
In Table 2, the symbol "^" represents a power, for example, "10 ^ -5" represents "10 ^ 5 ^ 10^-5”。
Further, in some embodiments of the present application, the material of the first barrel may be selected to make the elasticity of the first barrel greater than that of the first lens, so as to buffer the clamping force of the external clamp when the first barrel is clamped, thereby reducing the force indirectly acting on the first lens. Meanwhile, the first lens cone has good elasticity and has the effect that the first lens cone is easy to restore to the original shape after the clamp is loosened. Table 3 shows the elastic modulus of some barrel materials. Table 4 shows the elastic modulus of some lens materials.
TABLE 3
Name of the Material Modulus of elasticity (GPa)
PE (Medium/Low density) 0.172
FR-PET 1.5-2
POLIYIMSE 1.07
AS(ASN) 1.93
PC 2.4-2.6
PBT 2.8
PE (high density) 2.914
PPO(NORYL) 2.32
PP polypropylene 4
PEI 10
LCP 11.7
TABLE 4
Figure PCTCN2019084449-APPB-000003
In a preferred embodiment, a first lens made of PMMA material and a first lens barrel made of middle-low density PE material (the middle-low density PE material may have a density of 0.920-0.940 g/cm, for example)3Polyethylene material of (ii). Thus, the first barrel not only has elasticity superior to that of the first lens but also has a small water absorption rate, and the difference in the thermal expansion coefficients of the first barrel and the second barrel is, for example, 4 × 10-5Within/° c. The scheme of the embodiment can reduce the first lens componentThe first lens barrel is heated (for example, baked) to deform, the shape variation or position deviation of the first lens barrel caused by moisture accumulation can be reduced, and the acting force of the external capturing mechanism on the first lens can be buffered through the elasticity of the first lens barrel, so that the difference between the state of the optical system after the first glue material is cured and the state of the optical system determined by active calibration can be reduced, and the imaging quality of the lens or the module can be further ensured. In this embodiment, the second lens barrel may be made of a conventional lens barrel material (e.g., a PC material), so that the second lens part may still be made by a conventional process, which is helpful for improving the yield of products and improving the production efficiency. In mass production (e.g., mass production of mobile phone camera modules), the production of the same type of camera module (or corresponding optical lens) may reach the order of tens of millions or even hundreds of millions, so the yield and production efficiency of the product are not negligible.
Fig. 22 shows a schematic cross-sectional view of an optical lens of an embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the optical lens includes a first lens component 100, a second lens component 200, and a first plastic 300. The first lens component 100 includes a first lens 101, and the first lens 101 has a first optical area 1011 for optical imaging and a first structure area 1012 outside the first optical area 1011. The second lens component 200 comprises a second barrel 202 and four second lenses 201 mounted on the second barrel 202, the four second lenses 201 and the first lens 101 together form an imageable optical system, the second lenses 201 have a second optical area 2011 for optical imaging and a second structural area 2012 outside the second optical area 2011, the second structural area 2012 and the second barrel 202 form a structural area of the second lens component 200, and a first gap 400 is formed between a top surface 2021 of the structural area of the second lens component 200 and a bottom surface 1013 of the first structural area 1012. In this embodiment, since the second barrel 202 completely covers the second structure region 2012, and the top surface of the second structure region 2012 is not exposed to the outside, in this embodiment, the top surface 2021 of the structure region of the second lens component 200 is actually the top surface of the second barrel 202 (note that, in other embodiments, the top surface 2021 of the structure region of the second lens component 200 may be formed by the top surface of the second barrel 202 and the top surface of the second structure region 2012 of the second lens 201 together). The top surface of the second barrel 202 is a flat surface. Note that in other embodiments, the top surface of the second lens component 200 may be formed by the top surface of the second barrel 202 and the top surface of the second structure region 2012. Still referring to fig. 22, in the present embodiment, the first adhesive 300 is located in the first gap 400 and extends outward along the top surface 2021 of the structural region of the second lens component 200 and surrounds the first structural region 1012, and the first adhesive 300 extending outward wraps at least a portion of the outer side surface 1014 of the first structural region 1012 (in the present embodiment, the first adhesive 300 does not wrap the entire outer side surface 1014 of the first structural region 1012). The first rubber 300 is adapted to support and fix the first lens 101 and the second lens part 200, so that the relative position of the first lens 101 and the second lens part 200 is maintained at the relative position determined by the active calibration.
Fig. 25 shows a schematic cross-sectional view of an optical lens of another embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the first adhesive material 300 covers the entire outer side surface 1014 of the first structure region 1012. Further, fig. 28 shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application. In the embodiment shown in fig. 28, the first adhesive material 300 wraps around all of the outer side surface 1014 of the first structure region 1012 and also covers the top surface 1015 of the first structure region 1012. The applicant has found that in an optical lens assembly scheme based on an active calibration technique, the shape and position of the first lens 101 and the second lens 201 may be subject to quadratic variation after the active calibration is completed. Specifically, the second variation may be, for example, a change of an optical system of an actual product (e.g., an optical lens or a camera module) relative to the optical system determined by the active calibration (step 30) during the curing process of the first rubber material 300 or after long-term use. Such changes will result in a deterioration of the imaging quality of the product. The applicant further finds that, compared to the scheme that the first glue 300 is only filled between the bottom surface of the first lens 101 and the top surface of the second lens component 200, when the first glue 300 wraps the side surface of the first lens 101, the resolution of the actual product is closer to that obtained by the active calibration, so the design that the first glue 300 wraps the side surface of the first lens 101 helps to improve the product yield.
Fig. 24 shows a schematic cross-sectional view of an optical lens of another embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the first adhesive material 300 is black, and shields the outer side surface 1014 and the top surface 1015 of the first structure region 1012 to form a diaphragm.
Fig. 35 shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the first lens component 100 further includes a first lens barrel 102, and the first lens barrel 102 surrounds the first lens 101 and blocks the light emitted from the outside to the outer side surface 1014 and the top surface 1015 of the first structure area 1012. Further, the first glue material 300 fills the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102.
Fig. 36A shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. This embodiment is obtained by modifying the first lens 101 based on the embodiment shown in fig. 35. Fig. 36B shows a modified first lens 101. In this embodiment, the top surface 1015 of the first structure area 1012 of the first lens 101 has an overflow trough 1013, and the overflow trough 1013 is located near one end of the first optical area 1011 of the first lens 1011.
Fig. 46A shows a schematic cross-sectional view of an optical lens of yet another embodiment of the present application. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the optical lens includes a first barrel 102, a second glue material 500 is disposed between a bottom surface 1021 of the first barrel 102 and a top surface 2021 of the second barrel 202, and the first barrel 102 is adhered to the second barrel 202 through the second glue material 500. A cavity 1022 is formed between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102. In this embodiment, the second lens component 200 has an air escape channel for communicating the cavity 1022 with the outside. In this embodiment, the air escape channel is formed by disposing the air escape groove 600 on the top surface of the second barrel 202. Fig. 40A shows a schematic top view of the top surface of an exemplary second barrel 202. Referring to fig. 40A, the top surface of the second barrel 202 has an air escape groove 600. For simplicity and clarity of illustration, the run and location of the air escape slots 600 are only schematically illustrated in fig. 40A. The air escape groove 600 may be a groove along the radial direction of the second barrel 202. Further, fig. 40B shows a partially enlarged schematic view of the AA' section in fig. 40A. Referring to fig. 40B, the air escape groove 600 includes a sub-groove 601 and two sub-grooves 602 respectively located at two sides of the sub-groove 601. Further, fig. 39 shows a schematic cross-sectional view of drawing the second glue material 500 on the top surface of the second barrel 202, and fig. 41A shows a schematic drawing of drawing the glue on the top surface of the second barrel 202. It can be seen that the second rubber material 500 forms a ring shape with a gap on the top surface of the second barrel 202, and the gap is located at the position of the air escape groove 600. FIG. 41B shows a partially enlarged schematic view of the AA' section of FIG. 41A. The glue blocking sub-groove 602 accommodates the second glue material 500 overflowing, so that the air vent sub-groove 601 is not blocked by the second glue material 500, thereby ensuring that a gap is left in the second glue material 500. Like this, in the stage of toasting, cavity 1022 can be through the breach and the external world intercommunication of sub-groove 601 of ventilating and second glue material 500, avoids the air inflation in cavity 1022 and causes first lens 101 dislocation or deformation, and then has ensured the imaging quality based on the optical lens of initiative calibration. On the other hand, the design of the air escape groove 600 can reduce glue drawing errors caused by careless operation (for example, carelessly forming the second glue material 500 into a completely closed ring shape), which is helpful to improve yield in mass production.
It should be noted that in other embodiments, the air escape channel may also be disposed in the first lens component 100, or may be formed by the first lens component 100 and the second lens component 200 together. The air escape channel may include an air escape groove 600 located on the top surface 2021 of the second barrel 202 and/or an air escape groove 600 located on the bottom surface 1021 of the first barrel 102.
Fig. 46B shows the first lens 101 in yet another embodiment of the present application. In the present embodiment, the first mirror 101 in the optical lens of fig. 24 may be replaced with a modified first mirror 101 shown in fig. 46B. In this embodiment, the top surface 1015 of the first structural area 1012 of the first lens 101 is inclined, and the end of the top surface 1015 of the first structural area 1012 near the first optical area 1011 is higher than the end thereof near the outer side surface 1014 of the first structural area 1012. When the first adhesive 300 is located on the top surface 1015 of the first structure region 1012 (for example, when the first adhesive 300 is used to cover the top surface 1015 of the first structure region 1012), the adhesive will automatically flow to the cavity 1022, thereby preventing the optical region of the first lens 101 from being contaminated and causing poor product. In another embodiment, the first lens 101 shown in fig. 36B can be used to replace the first lens 101 shown in fig. 46A, so that the optical area of the first lens 101 can be prevented from being contaminated to cause poor product.
On the basis of the above embodiments, further, a corresponding camera module is also provided, and the camera module may include the optical lens described in any of the above embodiments. Specifically, the camera module can comprise an optical lens and a photosensitive assembly. Wherein the optical lens may be the optical lens in any of the embodiments described above. In this embodiment, the first plastic material 300 wraps the side surface of the first lens 101, so that the actual resolution of the produced camera module is closer to the resolution obtained by active calibration, which is helpful to improve the yield of products. The camera module may also include a motor (or other type of optical actuator), and the optical lens may be mounted within a cylindrical carrier of the motor, the base of which is mounted to the top surface of the photosensitive assembly. Further, the photosensitive member may include, for example, a wiring board, a photosensitive chip mounted on a surface of the wiring board, a ring-shaped support formed on or mounted on the surface of the wiring board and surrounding the photosensitive chip, and a color filter. The ring support may form a step, and the color filter is mounted on the step of the ring support. The base of the motor is mounted on the top surface of the ring-shaped support body.
Further, according to an embodiment of the present application, there is provided an optical lens assembling method including:
step S10, a preparation step. Preparing a first lens part 100 and a second lens part 200 to be separated from each other, the first lens part 100 including one first lens 101, the first lens 101 having a first optical area 1011 for optical imaging and a first structural area 1012 outside the first optical area 1011, the second lens part 200 including a second lens barrel 202 and four second lenses 201 mounted in the second lens barrel 202, the four second lenses 201 having a second optical area 2011 for optical imaging and a second structural area 2012 outside the second optical area 2011, and the second structural area 2012 and the second lens barrel 202 constituting structural areas of the second lens part 200.
Step S20, pre-positioning step. Second lens part 200 pre-positions the first lens part 100 and the second lens part 200, so that the first lens 101 and the four second lenses 201 together form an imaging optical system.
Step S30, active calibration step. The relative positions of the first lens component 100 and the second lens component 200 are adjusted and determined based on active calibration.
Step S40, a bonding step. Bonding the first lens 101 and the second lens component 200 by a first adhesive 300, wherein a first gap 400 is formed between a top surface of the structural region of the second lens component 200 and a bottom surface of the first structural region 1012, the first adhesive 300 is located in the first gap 400 and extends outward along the top surface of the structural region of the second lens component 200 and surrounds the first structural region 1012, and the outward extending first adhesive 300 wraps at least a portion of an outer side surface of the first structural region 1012, and after the first adhesive 300 is cured, the first lens 101 and the second lens component 200 are fixed and maintained at a relative position determined by active alignment. Fig. 22 shows a schematic cross-sectional view of an optical lens according to an embodiment of the present application, and it can be seen that the first adhesive material 300 does not wrap the entire outer side surface 1014 of the first structure region 1012 in the embodiment shown in fig. 22. Fig. 25 shows a schematic cross-sectional view of an optical lens according to another embodiment of the present application, in which the first glue material 300 wraps around the entire outer side surface 1014 of the first structure area 1012 in the embodiment shown in fig. 25. Fig. 28 shows a schematic cross-sectional view of an optical lens according to yet another embodiment of the present application, in which the first glue material 300 wraps around all of the outer side surface 1014 of the first structure region 1012 and covers a portion of the top surface 1015 of the first structure region 1012.
The applicant has found that in an optical lens assembly scheme based on an active calibration technique, the shape and position of the first lens 101 and the second lens 201 may be subject to quadratic variation after the active calibration is completed. Specifically, the second variation may be, for example, a change of an optical system of an actual product (e.g., an optical lens or a camera module) relative to the optical system determined by the active calibration (step 30) during the curing process of the first rubber material 300 or after long-term use. Such changes will result in a deterioration of the imaging quality of the product. The applicant further finds that, compared to the scheme that the first glue 300 is only filled between the bottom surface of the first lens 101 and the top surface of the second lens component 200, when the first glue 300 wraps the side surface of the first lens 101, the resolution of the actual product is closer to that obtained by the active calibration, so the design that the first glue 300 wraps the side surface of the first lens 101 helps to improve the product yield.
Further, in one embodiment, the bonding step (step S40) includes:
s401, a glue drawing step. A liquid first glue 300 is disposed on the top surface 2021 of the structural region of the second lens component 200.
S402, a positioning step based on the active calibration result. Moving the first lens 101 to above the second lens part 200, then approaching the second lens part 200 gradually and contacting the first rubber 300, and adjusting the relative position of the first lens 101 and the second lens part 200 to the relative position determined by the active calibration, wherein the arranged liquid first rubber 300 is at least located in the first gap 400.
S403, a pre-curing step. After S402 is completed, the first adhesive material 300 is pre-cured. During the pre-cure process, the first lens 101 and the second lens component 200 are maintained in relative positions determined by active calibration by means of an external uptake mechanism and/or a fixed platform. For example, an external capturing mechanism (e.g., a clamp) captures the first lens 101, and the fixed platform holds the second lens component 200. The external uptake mechanism can be adjusted in multiple degrees of freedom (e.g., six-axis adjustment). After pre-curing, the first lens 101 and the second lens part 200 are maintained in relative positions determined by active calibration by means of the pre-cured first glue 300. Further, in one embodiment, the pre-curing step may be an exposure process of the first glue material 300.
S404, a permanent curing step. The first glue material 300 is permanently cured, and a finished optical lens can be obtained. In one embodiment, the permanent curing may be baking the pre-cured combination of the first rubber 300, the first lens 101 and the second lens part 200, so that the first rubber 300 is permanently cured.
It is noted that, in one embodiment, the order of step S401 and step S30 may be interchanged, and step S30 may be performed in combination with step S402.
Further, in one embodiment, in the step S402, the disposed liquid first glue material 300 may be only located in the first gap 400. Between steps S403 and S404, a liquid first adhesive 300 may be further added on the periphery of the pre-cured first adhesive 300, so that the first structure region 1012 of the first lens 101 is wrapped by the first adhesive 300. The wrap may be partial wrap of the sides of the first structural region 1012 as shown in fig. 22, full wrap of the sides of the first structural region 1012 as shown in fig. 25, full wrap of the sides of the first structural region 1012 and coverage of the top of the first structural region 1012 as shown in fig. 26. Finally, step S404 is executed to permanently cure the first adhesive material 300, so as to obtain a finished optical lens.
Further, in an embodiment, an optical lens with the first adhesive 300 as a diaphragm may be manufactured on the basis of the embodiment shown in fig. 22, and includes: adding a first glue material 300 (the first glue material 300 can be black) on the basis of fig. 22 to wrap the whole outer side surface of the first structure area 1012 and cover the whole top surface of the first structure area 1012; and after baking, permanently curing and integrating all the first rubber materials 300 into a whole, thereby obtaining the optical lens with the first rubber materials 300 as the diaphragm. This arrangement helps to reduce flare of the optical lens. Fig. 23 and 24 show a process of manufacturing an optical lens having the first rubber 300 as a diaphragm on the basis of the embodiment shown in fig. 22. Fig. 23 is a schematic diagram of fig. 22 with a first adhesive material 300 added to wrap the entire outer side surface 1014 of the first structure region 1012 and cover the top surface 1015 of the first structure region 1012. The first rubber 300 may be black. And the first glue 300 added covers the entire top surface 1015 of the first structure region 1012 to form a diaphragm. Fig. 24 shows a schematic view of all the first glue 300 permanently cured and fused together after baking the intermediate body of fig. 23.
Further, in another embodiment, an optical lens with the first adhesive 300 as a diaphragm can be manufactured on the basis of the embodiment shown in fig. 25, and includes: adding a first glue material 300 (the first glue material 300 can be black) on the basis of fig. 25 to wrap the whole outer side surface of the first structure area 1012 and cover the whole top surface of the first structure area 1012; and after baking, permanently curing and integrating all the first rubber materials 300 into a whole, thereby obtaining the optical lens with the first rubber materials 300 as the diaphragm. This arrangement helps to reduce flare of the optical lens. Fig. 26 and 27 show a process of manufacturing an optical lens having the first rubber 300 as a diaphragm on the basis of the embodiment shown in fig. 25. Fig. 26 is a schematic diagram of fig. 25 with a first glue material 300 added to wrap the entire outer side of the first structure region 1012 and cover the top surface of the first structure region 1012. The first rubber 300 may be black. And the first glue 300 added covers the entire top surface 1015 of the first structure region 1012 to form a diaphragm. Fig. 27 shows a schematic view of all the first glue 300 permanently cured and fused together after baking the intermediate body of fig. 26.
Further, in yet another embodiment, an optical lens having the first adhesive 300 as a diaphragm may be manufactured on the basis of the embodiment shown in fig. 28, and includes: adding a first glue material 300 (the first glue material 300 can be black) on the basis of fig. 28 to wrap the whole outer side surface of the first structure region 1012 and cover the whole top surface 1015 of the first structure region 1012; and after baking, permanently curing and integrating all the first rubber materials 300 into a whole, thereby obtaining the optical lens with the first rubber materials 300 as the diaphragm. This arrangement helps to reduce flare of the optical lens. Fig. 29 and 30 show a process of manufacturing an optical lens having the first rubber 300 as a diaphragm on the basis of the embodiment shown in fig. 28. Fig. 29 is a schematic diagram of fig. 28 with a first adhesive 300 applied to cover the entire outer side surface 1014 of the first structure region 1012 and cover the top surface 1015 of the first structure region 1012. The first rubber 300 may be black. And the first glue 300 added covers the entire top surface 1015 of the first structure region 1012 to form a diaphragm. Fig. 30 is a schematic view showing that all the first rubber 300 is permanently cured and integrated after the semi-finished product shown in fig. 29 is baked.
In the foregoing, the optical lens shown in fig. 22, 25, 28, which is the basis for manufacturing the optical lens with the first rubber 300 as the diaphragm, may be a finished product in which the permanent curing step (S404) is completed; or a semi-finished product in which the pre-curing step is completed but the permanent curing step (S404) is not completed, in which case the permanent curing of all the first glue 300 can be completed by one-time baking after the first glue 300 is added.
Further, according to an embodiment of the present application, a method for manufacturing an optical lens having the first barrel 102 is also provided. The addition of the first lens barrel 102 can make the appearance of the optical lens more neat and beautiful, and simultaneously can protect the first lens 101, and reduce the influence of external impact on the optical system. The first barrel 102 can also be used as a diaphragm, so that the influence of external stray light on the imaging quality is reduced. In this embodiment, the method for manufacturing an optical lens includes:
step S100 is to fabricate an optical lens semi-finished product based on active alignment based on steps S10-S40, and then to draw glue on the periphery of the first glue 300 and the top surface 1015 of the first structure region 1012 of the first lens 101, for example, to add the liquid first glue 300. Fig. 31 shows a schematic diagram of the first lens 101 after glue is applied to the periphery of the first glue material 300 and the top surface 1015 of the first structure area 1012 according to an embodiment of the present application. In this step, the semi-finished products produced in steps S10-S40 may be subjected to a permanent curing process (e.g., baking), or may be subjected to a pre-curing process (e.g., exposure) without being subjected to a permanent curing process.
Step S200, covering the first lens barrel 102 on the first lens 101 to form a diaphragm, wherein the first lens barrel 102 is moved to above the first lens 101, and then the first lens barrel 102 is gradually close to the first lens 101 and contacts the added first adhesive 300, so that the first adhesive 300 fills the gap between the outer side surface and the top surface of the first lens 101 and the first lens barrel 102. Fig. 32 is a schematic diagram illustrating that the first barrel 102 is moved above the first lens 101, and then the first barrel 102 is gradually close to the first lens 101. Fig. 33 shows a schematic view of the first barrel 102 contacting the added first glue material 300. Then, the first barrel 102 continues to approach the first lens 101 and presses the added liquid first glue material 300, so that the first glue material 300 fills the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102. Fig. 34 shows a schematic view of the first glue 300 filling the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102.
Further, in one embodiment, the amount of the first adhesive material 300 can be controlled to match the designed gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102, so that the first adhesive material 300 fills the gap between the outer side surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102.
Step S300, after step S200 is completed, baking the assembly of the first rubber 300, the first lens 101, the first lens barrel 102 and the second lens part 200, so that all the first rubber 300 is permanently cured, and obtaining the optical lens finished product with the first lens barrel 102. As shown in fig. 35, in an embodiment of the present application, all the first glue material 300 is permanently solidified and fused into a whole.
In this embodiment, since the gaps between the outer surface 1014 and the top surface 1015 of the first lens 101 and the first barrel 102 are completely filled with the adhesive material, the first lens 101 is not deformed or displaced due to gas expansion during the baking process. It should be noted that in the actual mass production process, it is difficult to perfectly match the amount of the glue material added to the design gap in the production of each product, and therefore, a small air gap may exist between the first glue material 300 and the first barrel 102. However, the air gap is usually very small, and the first glue 300 between the first lens 101 and the first glue is able to play a role of buffering, so the air gap left due to imperfect matching between the glue addition amount and the design gap does not affect the imaging quality, and the method of this embodiment can still have a good yield.
Further, according to another embodiment of the present application, another method for manufacturing an optical lens having the first barrel 102 is also provided. As described above, the addition of the first barrel 102 can make the appearance of the optical lens more neat and beautiful, and at the same time, can protect the first lens 101, and reduce the influence of external impact on the optical system. The first barrel 102 can also be used as a diaphragm, so that the influence of external stray light on the imaging quality is reduced. In this embodiment, the method for manufacturing an optical lens includes:
and S1000, manufacturing the optical lens semi-finished product based on the active calibration based on the steps S10-S40. In step S40, only step S401 to step S403 may be executed, or all of step S401 to step S404 may be executed. Fig. 37 shows a semi-finished product state after completion of step S402 in one embodiment of the present application. Fig. 38 is a schematic view illustrating the semi-finished product of fig. 37 being exposed to pre-cure the first glue material 300 according to an embodiment of the present application. In fig. 38, arrows show light for exposing the first glue material 300.
Step S2000, disposing a second liquid adhesive 500 on the top surface 2021 of the structural region of the second lens component 200, where the second adhesive 500 surrounds the first adhesive 300. The second glue material 500 may be in contact with the pre-cured first glue material 300, or may be spaced apart from the pre-cured first glue material 300. In this embodiment, the second adhesive material 500 is in contact with the pre-cured first adhesive material 300, and preferably, the second adhesive material 500 may be made of the same material as the first adhesive material 300, so as to avoid the mutual doping and chemical reaction that may cause the variation of the adhesive material.
Further, fig. 40A shows a schematic top view of the top surface of an exemplary second barrel 202. Referring to fig. 40A, the top surface of the second barrel 202 has an air escape groove 600. For simplicity and clarity of illustration, the run and location of the air escape slots 600 are only schematically illustrated in fig. 40A. The air escape groove 600 may be a groove along the radial direction of the second barrel 202. Further, fig. 40B shows a partially enlarged schematic view of the AA' section in fig. 40A. Referring to fig. 40B, the air escape groove 600 includes a sub-groove 601 and two sub-grooves 602 respectively located at two sides of the sub-groove 601. Further, fig. 41A shows a schematic diagram of painting glue on the top surface of the second barrel 202. It can be seen that the second rubber material 500 forms a ring shape with a gap on the top surface of the second barrel 202, and the gap is located at the position of the air escape groove 600. FIG. 41B shows a partially enlarged schematic view of the AA' section of FIG. 41A. The glue blocking sub-groove 602 accommodates the second glue material 500 overflowing, so that the air vent sub-groove 601 is not blocked by the second glue material 500, thereby ensuring that a gap is left in the second glue material 500.
Step S3000, after the glue drawing of the second glue material 500 is completed, covering the first lens barrel 102 on the first lens 101 to form a diaphragm. The first barrel 102 is moved to above the first lens 101, and then the first barrel 102 is gradually moved closer to the first lens 101 and the bottom surface 1021 of the first barrel 102 contacts the second adhesive material 500. Fig. 42 shows a schematic diagram of moving the first barrel 102 above the first lens 101 and then gradually approaching the first barrel 102 to the first lens 101. Fig. 43 shows a schematic view of the second glue material 500 added to contact the bottom surface of the first barrel 102. Then, the first barrel 102 continues to approach the first lens 101, the bottom surface 1021 of the first barrel 102 is fully contacted with the liquid second glue material 500, and then the second glue material 500 is pre-cured by exposure to fix the first barrel 102 on the top surface 2021 of the second barrel 202. Fig. 44 shows a schematic view of exposing the second rubber material 500. The arrows in the figure show the light used to expose the second glue 500. Fig. 45 shows a state of the semi-finished product after the pre-curing is completed.
Step S4000, baking the assembly of the first plastic material 300, the second plastic material 500, the first lens 101, the first lens barrel 102 and the second lens part 200 (i.e. the finished product after step S3000), so that the first plastic material 300 and the second plastic material 500 are permanently cured. The finished product after baking is shown in fig. 46A. In this step, due to the design of the air escape groove 600, the second plastic material 500 can be ensured to have a gap, and in the baking process, the cavity 1022 can be communicated with the outside through the gaps of the air vent sub-groove 601 and the second plastic material 500, so that the dislocation or deformation of the first lens 101 caused by the expansion of air in the cavity 1022 is avoided, and the imaging quality of the optical lens based on active calibration is further ensured. In particular, the design of the air escape groove 600 can reduce glue drawing errors caused by careless operation (for example, carelessly forming the second glue material 500 into a completely closed ring shape), which is helpful to improve yield in mass production.
On the basis of the above embodiment, further, a camera module assembling method, which assembles an optical lens by using the optical lens assembling method described in the above embodiment; and assembling a camera module based on the optical lens.
In this context, the active calibration is to calibrate the relative positions of the first lens component 100 and the second lens component 200 based on the actual image-forming measured actual resolving power curve of the optical system (i.e. the four second lenses 201 and the one first lens 101 together form the image-forming optical system), so as to improve the image-forming quality of the optical lens.
The active calibration described herein allows for adjustment of the relative positions of the first lens component 100 and the second lens component 200 in multiple degrees of freedom. Fig. 53A shows a relative position adjustment manner in the active calibration in one embodiment of the present application. In this adjustment manner, the first lens part 100 (or the first lens 101) can move along the x, y, and z directions relative to the second lens part 200 (i.e., the relative position adjustment in this embodiment has three degrees of freedom). Where the z-direction is the direction along the optical axis and the x, y-directions are the directions perpendicular to the optical axis. The x, y directions both lie in a tuning plane P within which translation can be resolved into two components in the x, y directions.
FIG. 53B illustrates rotational adjustment in active calibration according to another embodiment of the present application. In this embodiment, the relative position adjustment has an increased rotational degree of freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 53A. In the present embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, i.e. a rotation around an axis perpendicular to the adjustment plane P.
Further, fig. 53C shows a relative position adjustment manner with v and w direction adjustments added in the active calibration of the further embodiment of the present application. Where 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 may be combined into a vector angle representing the total tilt state. That is, by the v-direction and w-direction adjustment, the tilt posture of the first lens component 100 with respect to the second lens component 200 (i.e., the tilt of the optical axis of the first lens component 100 with respect to the optical axis of the second lens component 200) can be adjusted.
The adjustment of the above-mentioned six degrees of freedom x, y, z, r, v, and w may affect the imaging quality of the optical system (e.g., affect the magnitude of the resolution). In other embodiments of the present application, the relative position adjustment may be performed by adjusting only any one of the six degrees of freedom, or by a combination of any two or more of the six degrees of freedom.
Further, in an embodiment, in the active calibration step, the movement further comprises a translation in the adjustment plane, i.e. a movement in the x, y direction.
Further, in one embodiment, the active calibration further comprises: the angle of the axis of the or first lens 101 with respect to the axis of the second lens part 200, i.e. the adjustment in the w, v direction, is adjusted and determined according to the measured resolving power of the optical system. In the assembled optical lens or camera module, an included angle between an axis of the first lens 101 and an axis of the second lens component 200 may be different from zero.
Further, in one embodiment, the active calibration further comprises: moving the first lens piece 101 in a direction perpendicular to the adjustment plane (i.e. adjustment in z-direction), the relative position between the first lens piece 101 and the second lens piece 200 in the direction perpendicular to the adjustment plane is determined from the measured resolving power of the optical system.
Further, in one embodiment, in the pre-positioning step (step 20), a gap is formed between the bottom surface of the first lens 101 and the top surface of the second lens part 200; and in the step of bonding (step 40), the adhesive material is disposed in the gap.
In one embodiment, the first lens 101 may be formed by a plurality of sub-lenses that are integrally fitted to each other. In this embodiment, the side surfaces and the top surface of the first lens sheet 101, which are not used for imaging, may be formed with a light shielding layer. The light shielding layer may be formed by screen printing a light shielding material on the side and top surfaces of the first lens 101.
In one embodiment, in the active calibration step, the second lens part 200 may be fixed, the first lens 101 is clamped by a clamp, and the first lens 101 is moved by a six-axis motion mechanism connected to the clamp, so as to realize the relative movement between the first lens 101 and the second lens part 200 in the above six degrees of freedom. Wherein the clamp can bear against or partially bear against the side of the first lens 101, thereby clamping the first lens 101.
It should be noted that in the above embodiments, the number of lenses of the first lens component 100 and the second lens component 200 can be adjusted as required. For example, the number of lenses of the second lens component 200 may be one, two, three, or five, etc. Accordingly, the total number of lenses of the whole optical lens can also be adjusted according to needs, for example, the total number of lenses of the optical lens can be six, or three, four or seven, and so on.
It should be noted that in the foregoing embodiments, the first adhesive material is wrapped around part or all of the side surface of the first lens by two-time glue painting. This is due to the fact that during active alignment, the first lens needs to be captured by the capturing mechanism, which may be a gripper. Since it is necessary to avoid actively aligned light paths, the gripping jaws are preferably arranged on the side of the first lens, gripping the first lens from both sides by contacting the side of the first lens. Therefore, glue is drawn on the gap between the bottom surface of the first lens and the top surface of the second lens barrel (or the second lens component), after the glue material is pre-cured, the clamping jaws are loosened, and then glue is drawn on the side surface and the top surface of the first lens for a second time (namely, liquid first glue material is added around the first structural area and/or the top surface) and cured, so that the first glue material wraps the partial or all side surfaces of the first lens.
Further, fig. 47 shows a schematic diagram of drawing a first plastic material on a top surface of a structural region of the second lens component in another embodiment of the present application. In this embodiment, the contact point 1019 (which may also be referred to as a contact surface) of the jaw 900 with the side surface 1014 of the first lens is disposed proximate to the top surface 1015 of the first lens. The first adhesive material is drawn on the top surface of the second lens component, and the top surface of the first adhesive material is controlled to be lower than a certain height, so that the clamping jaw 900 is not in contact with the first adhesive material 300 all the time in the active calibration process (or the clamping jaw places the first lens to the position determined by the active calibration process) (for example, the clamping jaw is higher than the top surface of the first adhesive material all the time in the active calibration process), and thus the first adhesive material can wrap part of the side surface of the first lens (for example, the side surface wrapping the first lens is located in the area below the contact point of the clamping jaw and the first lens), and cannot interfere with the clamping jaw. Meanwhile, one-time glue drawing can be reduced, and the production efficiency is improved.
According to another embodiment of the present application, another optical lens assembly method is further provided, in which the first glue material is coated on the side surface of the first lens by painting glue once by means of painting glue breaking. Fig. 48 shows a painting method of painting broken glue on the first glue material in an embodiment of the present application. Figure 49 shows a jaw arrangement corresponding to the glue pattern shown in figure 48. Specifically, when the first adhesive material is drawn on the top surface of the second lens component (refer to fig. 48, which shows that the first adhesive material 300 is drawn on the top surface of the second lens barrel 202), the first adhesive material 300 is not completely closed, that is, the first adhesive material may be in the shape of a ring with a notch 309, and the notch is adapted to the clamping jaw 900 to form a gap through which the clamping jaw 900 can pass. Thus, during active alignment (or during placement of the first lens by the jaws into a position determined by active alignment), the top surface of the first glue material may be higher than the contact point of the jaws with the side surface of the first lens. When the bottom surface of the first lens contacts the top surface of the first adhesive material, the clamping jaw drives the first lens to continuously move downwards, so that the top surface of the first adhesive material is higher than the top surface of the first lens (the top surface of the first structural area), and the first adhesive material above the top surface of the first structural area flows to the top surface of the first structural area, so that the first adhesive material covers the top surface of the first structural area and wraps the side surface of the first structural area. Because the process can be finished by one-time glue drawing, the production efficiency is improved. On the other hand, the design of the first glue material with the gap can also provide air escape holes for the subsequent baking step (step of realizing permanent curing through baking), so as to avoid the product defect caused by gas expansion in the baking process.
In particular, in one embodiment, the top surface of the first structure region of the first lens can be made to be a slope with a higher outer side and a lower inner side, wherein the outer side is the side near the outer side of the first lens and the inner side is the side near the first optical region of the first lens. Fig. 52 shows a schematic view of a top surface of a first structure region provided with an inclined surface in an embodiment of the present application. Under this arrangement, when the top surface of the first glue material is higher than the top surface of the first structure region, the first glue material above the top surface of the first structure region flows along the inclined surface 1016 at the top of the first structure region and covers the top surface of the first structure region. Further, an annular protrusion 1017 (or dam) may be disposed on the top surface of the first structure region to prevent the first glue material from contaminating the first optical region. Wherein the annular boss 1017 may be disposed at a location proximate to the first optical zone.
Further, it is noted that the relative position of the first lens piece and the second lens piece determined after the active calibration may be an included angle between the optical axis of the first lens piece and the optical axis of the second lens piece, which is different from zero. If the included angle is too large, the first barrel may interfere with the first lens when the first barrel is further mounted, resulting in poor product. Fig. 50 shows an example in which the first barrel interferes with the first lens. In one embodiment, after the active calibration step, an included angle a between the optical axis of the first lens and the optical axis of the second lens component is obtained according to the recorded active calibration data, and in the step of covering the first lens barrel on the first lens, an included angle B between the central axis of the first lens barrel and the optical axis of the second lens component is determined according to the obtained included angle a between the optical axis of the first lens and the optical axis of the second lens component (for example, a difference between the included angle B and the included angle a is smaller than a preset threshold value), so as to avoid the first lens barrel from interfering (or colliding) with the first lens to cause poor products. Fig. 51 shows an example of avoiding interference between the first barrel and the first lens by making a difference between the included angle B and the included angle a smaller than a preset threshold.
Further, according to an embodiment of the present application, there is also provided a camera module assembling method, including: the optical lens assembly method of any one of the embodiments is used to assemble the optical lens, and then the assembled optical lens is used to manufacture the camera module.
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 the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (79)

  1. An optical lens, comprising:
    a first lens component comprising at least one first lens;
    the second lens component comprises a second lens barrel and at least one second lens arranged on the second lens barrel, and the at least one second lens and the at least one first lens form an imaging optical system together, wherein at least one part of the outer side surface of the second lens at the bottommost end in the at least one second lens is exposed outside the second lens barrel, and the top surface of the second lens at the bottommost end is supported against the bottom surface of the second lens barrel; and
    a connecting medium adapted to secure the first lens component and the second lens component together.
  2. The optical lens barrel according to claim 1, wherein the outer side surface of the bottommost second lens is entirely exposed outside the second barrel, the bottommost second lens includes an optical area for imaging and a structural area outside the optical area, and a top surface of the structural area bears against and is bonded to a bottom surface of the second barrel.
  3. An optical lens barrel according to claim 1, wherein the second lens barrel has a bottom surface with a groove and the extension is fitted into the groove, and the second lens barrel has an extension formed to extend outward from a side surface thereof in a direction perpendicular to an axis thereof.
  4. An optical lens according to claim 3, characterized in that the bottommost second lens comprises an optical zone for imaging and a structural zone outside the optical zone, and the extension is located in the structural zone.
  5. The optical lens barrel according to claim 4, wherein the area of the bottommost second lens outside the extension portion is the optical zone, and a side surface of the optical zone of the bottommost second lens abuts against an inner side surface of the second lens barrel.
  6. An optical lens according to claim 4, characterized in that there is a transition zone between the optical zone and the extension, located in the structured zone.
  7. An optical lens according to claim 3, characterized in that the bottommost second optic has a plurality of said extensions.
  8. An optical lens according to claim 6, characterized in that the number of the extension portions is two, the transition region and the two extension portions are formed by cutting the annular structure region twice, and the cut surfaces of the two cuts are both planar and parallel to each other.
  9. An optical lens barrel according to claim 3, wherein the second lens at the bottommost end is fixed with the second lens barrel by a second glue material between the extension part and the groove.
  10. An optical lens according to claim 1, wherein the connecting medium is a first glue, and wherein there is a gap between the first lens part and the second lens part in a direction along the optical axis, and wherein the first glue is located in the gap.
  11. An optical lens as claimed in claim 10, characterized in that the first glue is adapted to support and fix the first lens part and the second lens part and to maintain the relative positions of the first lens part and the second lens part in the relative positions determined by active calibration.
  12. An optical lens according to claim 11, characterized in that the optical axis of the first lens part and the optical axis of the second lens part have an angle different from zero.
  13. An optical lens according to claim 1, characterized in that the number of the first lenses is one.
  14. An optical lens as claimed in claim 1, characterized in that the first lens part further comprises a first barrel, and the at least one first lens is mounted inside the first barrel.
  15. A camera module, characterized in that it comprises an optical lens according to any one of claims 1 to 14.
  16. An optical lens assembly method, wherein the optical lens includes a first lens part and a second lens part, the first lens part includes a first barrel and at least one first lens mounted in the first barrel, and the second lens part includes a second barrel and at least one second lens mounted in the second barrel, wherein the optical lens assembly method includes:
    pre-positioning the first lens part and the second lens part which are separated from each other, so that the at least one second lens and the at least one first lens jointly form an imageable optical system, wherein at least a part of the outer side surface of the bottommost second lens in the at least one second lens is exposed outside the second lens barrel, and the top surface of the bottommost second lens bears against the bottom surface of the second lens barrel;
    adjusting and determining relative positions of the first lens component and the second lens component based on active calibration; and
    bonding the first lens piece and the second lens piece with a glue material that, after curing, supports and fixes the first lens piece and the second lens piece so that the relative positions of the first lens piece and the second lens piece are maintained at the relative positions determined by active calibration.
  17. An optical lens assembling method according to claim 16, wherein before the pre-positioning process, the optical lens assembling method further comprises:
    embedding and fixing a plurality of second lenses into each step on the inner side of the second lens barrel from small to large; and
    and attaching the last second lens to the bottom surface of the second lens barrel to obtain the second lens part.
  18. An optical lens assembly method as claimed in claim 17, wherein the last second lens has an extension part extending outward from a side surface thereof in a direction perpendicular to an axis thereof, and the bottom surface of the second barrel has a groove, wherein the step of attaching the last second lens to the bottom surface of the second barrel comprises:
    embedding the extension part of the last second lens into the groove on the bottom surface of the second lens barrel.
  19. An optical lens assembly method according to any one of claims 16-18, wherein the active calibration comprises: the first lens component is captured and moved by a capture mechanism to adjust and determine the relative position of the first lens and the second lens component.
  20. An optical lens assembly method according to claim 19, wherein the active calibration further comprises: moving the first lens component along an adjustment plane, determining a relative position between the first lens component and the second lens component on the adjustment plane according to a measured resolution based on an actual imaging result of the optical system; the relative position on the adjustment plane comprises a relative position in a translational direction and/or a rotational direction on the adjustment plane.
  21. An optical lens assembly method according to claim 20, wherein the active calibration further comprises: and adjusting and determining an included angle of the axis of the first lens component relative to the axis of the second lens component according to the actually measured resolution based on the actual imaging result of the optical system.
  22. An optical lens assembly method according to claim 20, wherein the active calibration further comprises: moving the first lens component along a direction perpendicular to the adjustment plane, and determining a relative position between the first lens component and the second lens component in the direction perpendicular to the plane according to a measured resolution based on an actual imaging result of the optical system.
  23. An optical lens, comprising:
    a first lens part including a first barrel and at least one first lens mounted within the first barrel;
    a second lens component which comprises a second lens barrel and at least one second lens arranged in the second lens barrel, wherein the at least one second lens and the first lens jointly form an imaging optical system, and the material of the first lens barrel is different from that of the second lens barrel; and
    the first rubber material is positioned in a first gap between the first lens part and the second lens part and is suitable for supporting and fixing the first lens part and the second lens part after solidification, and an included angle which is not zero is formed between the axis of the first lens part and the axis of the second lens part.
  24. An optical lens element according to claim 23 wherein the first piece of glue is adapted to support and secure the first and second lens components so as to maintain their relative positions in a relative position determined by active calibration.
  25. An optical lens according to claim 23, characterized in that the difference between the coefficient of thermal expansion of the first barrel and the coefficient of thermal expansion of the first lens is smaller than a first threshold.
  26. An optical lens according to claim 23, wherein the moisture absorption rate of the material of the first barrel is smaller than the moisture absorption rate of the material of the second barrel.
  27. An optical lens according to any one of claims 23 to 26, wherein the first lens is a glass lens and the first barrel is a metal barrel.
  28. An optical lens according to claim 27, wherein the first lens is a borosilicate glass lens and the first barrel is an oxygen-free copper barrel.
  29. An optical lens barrel according to claim 23, wherein the elastic modulus of the material of the first lens barrel is smaller than the elastic modulus of the material of the first lens barrel to buffer the force of the external capturing mechanism on the first lens.
  30. An optical lens barrel according to claim 29, wherein the first barrel is made of a material having a density of 0.920-0.940 g/cm3The material of the first lens is polymethyl methacrylate material.
  31. An optical lens barrel according to any one of claims 23 to 26, wherein the material of the first barrel is a first plastic, the material of the first lens is a second plastic, and the difference between the thermal expansion coefficients of the first plastic and the second plastic is 4 x 10-5Within/° c.
  32. An optical lens as claimed in claim 30, characterized in that the number of the first mirror is smaller than the number of the second mirror, and the second mirror is closer to the light-sensing chip than the first mirror.
  33. An optical lens according to claim 32, characterized in that the number of the first lenses is one and the outer diameter of the first lenses is larger than the second lens with the smallest outer diameter.
  34. An optical lens barrel according to any one of claims 30 to 33, wherein the second barrel is made of polycarbonate material.
  35. An optical lens barrel according to claim 28 or 31, wherein the first adhesive material is located between the first lens and the second lens barrel, but not located between the first lens barrel and the second lens barrel.
  36. The utility model provides a module of making a video recording which characterized in that includes: an optical lens according to any one of claims 23 to 35.
  37. An optical lens assembly method, characterized in that the optical lens comprises a first lens component and a second lens component, wherein the first lens component comprises a first lens barrel and at least one first lens mounted in the first lens barrel, the second lens component comprises a second lens barrel and at least one second lens mounted in the second lens barrel, wherein the first lens barrel is made of a material different from that of the second lens barrel;
    the optical lens assembling method comprises the following steps:
    pre-positioning the first lens part and the second lens part to enable the at least one first lens and the at least one second lens to jointly form an imaging optical system;
    performing active calibration according to the actually measured imaging result of the optical system, and determining the relative positions of the first lens component and the second lens component; and
    bonding the first lens piece and the second lens piece to support and fix a relative position of the first lens piece and the second lens piece.
  38. A camera module assembly method is characterized by comprising the following steps: assembling an optical lens using the optical lens assembling method of claim 15; and manufacturing the camera module based on the assembled optical lens.
  39. An optical lens, comprising:
    a first lens component comprising a first lens having a first optical zone for optical imaging and a first structural zone outside the first optical zone;
    a second lens component including a second barrel and at least one second lens mounted on the second barrel, the at least one second lens and the first lens together constituting an imageable optical system, the second lens having a second optical area for optical imaging and a second structural area outside the second optical area, the second structural area and the second barrel constituting a structural area of the second lens component, and a first gap being provided between a top surface of the structural area of the second lens component and a bottom surface of the first structural area; and
    the first glue material is positioned in the first gap, extends outwards along the top surface of the structure area of the second lens component, surrounds the first structure area, and wraps at least one part of the outer side surface of the first structure area.
  40. An optical lens according to claim 39 wherein the first glue is adapted to support and secure the first optic and the second lens component such that the relative positions of the first optic and the second lens component are maintained at the relative positions determined by the active calibration.
  41. An optical lens according to claim 39, wherein the first glue material wraps the entire outer side of the first structure region.
  42. An optical lens according to claim 41, wherein the first glue material further covers a top surface of the first structure region.
  43. An optical lens according to claim 42, wherein the first plastic material is black to cover the outer side and the top of the first structure region.
  44. An optical lens assembly as recited in claim 39, wherein the first lens component further includes a first lens barrel surrounding the first lens and blocking the light emitted from the outside to the outer and top surfaces of the first structural region.
  45. An optical lens according to claim 44, wherein the first glue fills gaps between the outer side and top surfaces of the first lens and the first barrel.
  46. An optical lens barrel according to claim 44, wherein a second adhesive material is provided between the bottom surface of the first barrel and the top surface of the second barrel, and the first barrel is adhered to the second barrel through the second adhesive material.
  47. An optical lens according to claim 46, characterized in that a cavity is provided between the outer and top surfaces of the first lens and the first barrel.
  48. An optical lens component as claimed in claim 47, wherein the first lens component and/or the second lens component has an air escape passage communicating the cavity with the outside.
  49. An optical lens barrel according to claim 48, wherein the air escape channel includes an air escape groove at a top surface of the second barrel and/or at a bottom surface of the first barrel.
  50. An optical lens barrel according to claim 49, wherein the second rubber material forms a ring shape with a notch on the top surface of the second barrel, and the notch is located at the air escape groove.
  51. An optical lens according to claim 50, wherein the air-escape groove comprises an air-vent sub-groove and two glue-stopping sub-grooves respectively located at two sides of the air-vent sub-groove, and the glue-stopping sub-grooves receive the overflowed second glue material, so that the air-vent sub-grooves are not blocked by the second glue material.
  52. An optical lens according to claim 45, wherein an end of the top surface of the first structure area near the first optical area has an overflow groove.
  53. An optical lens according to any one of claims 45 to 51, characterized in that the top surface of the first structure region is inclined and the end of the top surface of the first structure region closer to the first optical region is higher than the end thereof closer to the outer side surface of the first structure region.
  54. An optical lens according to claim 39, wherein the top surface of the second barrel is a flat surface, the first gap is located between the flat surface and the bottom surface of the first structure region, the first glue material is located in the first gap and extends outward along the flat surface and surrounds the first structure region, and the first glue material extending outward wraps at least a portion of an outer side surface of the first structure region.
  55. A camera module, characterized in that it comprises an optical lens according to any one of claims 39 to 54.
  56. A method of assembling an optical lens comprising a first lens part and a second lens part separated from each other, the first lens part comprising a first lens and the second lens part comprising a second barrel and at least one second lens mounted within the second barrel, the method comprising:
    pre-positioning the first lens part and the second lens part to enable the first lens and the at least one second lens to jointly form an imaging optical system;
    adjusting and determining relative positions of the first lens component and the second lens component based on active calibration; and
    bonding the first lens and the second lens component by a first glue material, wherein the first lens has a first optical area for optical imaging and a first structural area outside the first optical area, the second lens has a second optical area for optical imaging and a second structural area outside the second optical area, the second structural area and the second lens barrel constitute a structural area of the second lens component, a first gap is arranged between the top surface of the structural area of the second lens component and the bottom surface of the first structural area, the first glue material is positioned in the first gap and extends outwards along the top surface of the structural area of the second lens component and surrounds the first structural area, and the outwards extending first glue material wraps at least a part of the outer side surface of the first structural area, and the first glue material fixes and maintains the first lens and the second lens component at the relative position determined by active alignment after being cured.
  57. An optical lens assembly method according to claim 56, wherein the step of bonding by the first adhesive material includes:
    arranging a liquid first rubber material on the top surface of the structural area of the second lens component;
    moving the first lens to the upper part of the second lens part, then gradually approaching the second lens part and contacting the first rubber material, and adjusting the relative position of the first lens and the second lens part to the relative position determined by the active calibration, wherein the arranged liquid first rubber material is at least positioned in the first gap;
    pre-curing the first rubber material; and
    and permanently curing the first glue material.
  58. An optical lens assembly method according to claim 57, wherein in the pre-curing step, the first lens piece and the second lens piece are maintained in relative positions determined by active alignment by means of an external capturing mechanism and/or a fixed platform during pre-curing, and after pre-curing, the first lens piece and the second lens piece are maintained in relative positions determined by active alignment by means of a pre-cured first glue.
  59. An optical lens assembly method according to claim 58, wherein the pre-curing step includes an exposure process for the first glue material.
  60. An optical lens assembly method according to claim 59, further comprising:
    and between the pre-curing step and the permanent curing step, a first paste adhesive material is added around and on the top surface of the first structure area, so that the first adhesive material wraps the whole outer side surface of the first structure area and covers the top surface of the first structure area.
  61. An optical lens assembly method according to claim 59 or 60, wherein the permanently curing step comprises:
    and baking the pre-cured assembly of the first rubber material, the first lens and the second lens component to permanently cure the first rubber material.
  62. An optical lens assembly method according to claim 59, further comprising:
    after the permanent curing step, adding a first glue material in a liquid state around the first structural area and on the top surface of the first structural area, so that the first glue material wraps the whole outer side surface of the first structural area and covers the top surface of the first structural area; and
    and solidifying the added first glue material.
  63. An optical lens assembly method as claimed in claim 60, wherein the first glue is black, and in the step of adding the liquid first glue, the first glue on the top surface of the first structure region forms a stop.
  64. An optical lens assembly method according to claim 60, further comprising:
    after the step of adding the liquid first glue material, covering a first lens barrel on the first lens to form a diaphragm, wherein the first lens barrel is moved to the position above the first lens, and then the first lens barrel is gradually close to the first lens and contacts the added first glue material, so that the first glue material is filled in the gap between the outer side surface and the top surface of the first lens and the first lens barrel.
  65. An optical lens assembly method according to claim 64, wherein an amount of the first adhesive is controlled to match a design gap between the outer side and top surfaces of the first lens and the first barrel so that the first adhesive fills the gap between the outer side and top surfaces of the first lens and the first barrel.
  66. An optical lens assembly method as claimed in claim 64, wherein in the preparing step, an end of the top surface of the first structure area near the first optical area has an overflow groove; and
    in the step of covering the first lens with the first lens barrel, the glue overflow groove accommodates the first glue material which overflows.
  67. An optical lens assembly method according to any of claims 63-66, wherein the permanent curing step comprises:
    and baking the pre-cured first rubber material, the first lens barrel and the second lens component to permanently cure the first rubber material.
  68. An optical lens assembly method according to claim 59 or 60, wherein the assembly method further comprises:
    after the pre-curing step, arranging a liquid second glue material on the top surface of the structural area of the second lens component, wherein the second glue material surrounds the periphery of the first glue material; and
    covering a first lens barrel on the first lens to form a diaphragm, moving the first lens barrel to the position above the first lens, and enabling the first lens barrel to gradually approach the first lens and the bottom surface of the first lens barrel to contact the second adhesive material.
  69. An optical lens assembly method according to claim 68, wherein the permanently curing step includes:
    and baking the pre-cured combination of the first rubber material, the second rubber material, the first lens barrel and the second lens component so as to permanently cure the first rubber material and the second rubber material.
  70. An optical lens assembly method according to claim 69, wherein in the preparing step, the top surface of the second barrel and/or the bottom surface of the first barrel has an air escape groove.
  71. An optical lens assembly method according to claim 68, wherein in the step of disposing the liquid second adhesive material, the second adhesive material forms a ring shape having a notch on a top surface of the second barrel in a plan view.
  72. An optical lens assembly method according to claim 71, wherein in the preparing step, a top surface of the second barrel has an air escape groove; and
    in the step of arranging the liquid second glue material, the notch is located at the position of the air escape groove.
  73. An optical lens assembly method as claimed in claim 72, wherein in the preparing step, the air escape groove includes a sub-air groove and two sub-glue grooves respectively located at two sides of the sub-air groove; and
    in the step of arranging the liquid second glue material, the glue retaining sub-groove accommodates the overflowing second glue material, so that the air vent sub-groove is not blocked by the second glue material.
  74. An optical lens assembly method as recited in claim 57, wherein in the step of disposing the first glue material in a liquid state on the top surface of the structural region of the second lens component, the first glue material is formed in an annular shape with a notch adapted to avoid an intake mechanism for laterally taking in the first lens.
  75. An optical lens assembly method as claimed in claim 74, wherein in the step of disposing the liquid first adhesive material on the top surface of the structure region of the second lens component, the capturing mechanism is a holding jaw.
  76. An optical lens assembly method according to claim 74, wherein in the preparing step, a top surface of the first structure region is an inclined surface whose outer side is higher and inner side is lower.
  77. An optical lens assembly method as recited in claim 76, wherein in the preparing step, the top surface of the first structure region is provided with an annular boss.
  78. An optical lens assembly method as claimed in claim 64 or 68, wherein in the step of covering the first lens barrel on the first lens, an included angle A between an optical axis of the first lens barrel and an optical axis of the second lens component determines an included angle B between a central axis of the first lens barrel and the second lens component so that a difference between the included angle B and the included angle A is smaller than a preset threshold.
  79. A camera module assembly method is characterized by comprising the following steps: assembling an optical lens using an optical lens assembly method as claimed in any one of claims 56-78; and
    and assembling a camera module based on the optical lens.
CN201980036283.6A 2018-04-28 2019-04-26 Optical lens, camera module and assembling method thereof Active CN112534328B (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
CN2018104030697 2018-04-28
CN201810403057.4A CN110412707A (en) 2018-04-28 2018-04-28 Optical lens, camera module and its assemble method
CN2018104013704 2018-04-28
CN201810403069.7A CN110412708A (en) 2018-04-28 2018-04-28 Optical lens, camera module and its assemble method
CN201810401370.4A CN110412706A (en) 2018-04-28 2018-04-28 Optical lens, camera module and its assemble method
CN2018104030574 2018-04-28
PCT/CN2019/084449 WO2019206255A1 (en) 2018-04-28 2019-04-26 Optical lens assembly, camera module, and assembling method therefor

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CN107800937A (en) * 2017-11-09 2018-03-13 信利光电股份有限公司 A kind of multi-cam module and terminal device
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CN1396473A (en) * 2001-05-18 2003-02-12 柯尼卡株式会社 Camera lens, camera device and forming method of the camera lens
CN2736789Y (en) * 2004-06-04 2005-10-26 鸿富锦精密工业（深圳）有限公司 Lens module of digital camera
WO2017092659A1 (en) * 2015-12-02 2017-06-08 宁波舜宇光电信息有限公司 Camera module adopting detachable lens and assembly method thereof
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