CN112444936A

CN112444936A - Under-screen camera shooting assembly, camera shooting module, optical lens and manufacturing method of optical lens

Info

Publication number: CN112444936A
Application number: CN201910759317.6A
Authority: CN
Inventors: 裴海鹏; 梅哲文; 田中武彦
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2021-03-05
Anticipated expiration: 2039-08-16

Abstract

The present application relates to an optical lens, comprising: a first lens piece and a second lens piece. The central area of the first surface of the first lens is convex towards the object side to form a protruding part, the top surface of the first lens forms an optical area, and the first structural area surrounds the protruding part. The second lens component comprises a second lens barrel and at least one second lens, the top of the second lens barrel is provided with an extension portion which extends inwards and forms a light inlet hole of the second lens component, the second lens at the topmost part is provided with a third surface which is positioned on the object side and comprises an optical area positioned in the center, an inner structure area and an outer structure area, the inner structure area surrounds the optical area, the outer structure area is supported against the bottom surface of the extension portion, and the inner structure area is exposed out of the extension portion. The first lens is adhered to the second lens component, and the outer diameter of the first lens is not larger than the aperture of the light inlet hole. The application also provides a corresponding camera module, a camera module under the screen and a corresponding manufacturing method. The aperture of the screen opening can be reduced on the premise of not sacrificing imaging quality.

Description

Under-screen camera shooting assembly, camera shooting module, optical lens and manufacturing method of optical lens

Technical Field

The invention relates to the technical field of camera modules, in particular to an under-screen camera module, a corresponding camera module, an optical lens and a manufacturing 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 the field of consumer electronics, such as smart phones, a front camera module is an indispensable component. Leading module of making a video recording sets up the homonymy at the display screen usually for satisfy functions such as user's auto heterodyne. However, as the screen occupation ratio becomes larger, higher and higher requirements are also placed on the arrangement of the front camera. In order to reduce the influence of the camera on the screen occupation ratio and realize the full-screen, different manufacturers develop various solutions from different angles. One technical direction is: arrange leading camera module at the cell-phone top frame, form the bang screen or the water droplet screen that are close to the full screen. The other technical direction is as follows: adopt telescopic camera module group so that hide and use the camera. When shooting is needed, the camera can be controlled to extend out of the shell of the mobile phone (or other electronic equipment) for shooting; after shooting, the camera retracts into the shell of the mobile phone (or other electronic equipment). However, when the camera is continuously extended or retracted and extends relative to the mobile phone (or other electronic devices), the camera is easily damaged by external impact, and is difficult to replace.

The scheme of 'perforated screen' is also commonly adopted in the current market, and the scheme of 'perforated screen' is usually matched with a camera module under a screen to realize the improvement of the mobile phone screen ratio as much as possible. The 'perforated screen' is a hole which can penetrate through visible light by canceling a structure which influences a lens to receive light in the screen, and a camera module is arranged at a position corresponding to the hole, so that the screen occupation ratio is improved as much as possible while the front-end shooting of the mobile phone is realized. But present camera module's head size all is more than 3mm, and the head of camera module is put into the hole and can be made the size of screen trompil big enough, and will make a video recording the module and place the screen in after, consider the demand of making a video recording the module angle of vision, the lateral wall of screen trompil can not influence camera module collection light, therefore the same trompil will be done relatively great, it is more than 4.5mm at least. The large opening can cause poor display effect of the screen and influence the use experience of the screen. It is therefore desirable that the openings of the "perforated screen" be as small as possible.

On the other hand, elements such as high pixels, large aperture, and small size have become irreversible development trends of camera modules, and the imaging quality requirements of consumers on camera modules are increasing. Therefore, how to reduce the aperture of the "aperture screen" as much as possible and make the front camera module satisfy the requirements of high pixel, large aperture, small size, etc. without sacrificing the imaging quality is also a difficult problem to be solved in the current market.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a solution for an under-screen camera module, a corresponding optical lens and a camera module.

To solve the above technical problem, the present invention provides an optical lens, including: a first lens having a first surface on an object side and a second surface on an image side, wherein a central region of the first surface is convex toward the object side to form a protrusion, a top surface of the protrusion forms an optical zone for imaging, the first surface further has a first structural zone surrounding the protrusion, and a side surface of the protrusion connects the optical zone and the first structural zone; and a second lens component including a second barrel and at least one second lens mounted inside the second barrel, wherein the at least one second lens and the first lens together form an imageable optical system, the top of the second barrel has an extension portion formed by extending inward, the center of the extension portion forms a light entrance hole of the second lens component, and the second lens located at the topmost position in the at least one second lens has a third surface located on the object side and a fourth surface located on the image side, the third surface includes an optical area located at the center, an inner structural area surrounding the optical area, and an outer structural area surrounding the inner structural area, the outer structural area bears against the bottom surface of the extension portion, and the inner structural area is exposed outside the extension portion; wherein the first lens is adhered to the second lens component, and the outer diameter of the first lens is not larger than the aperture of the light inlet of the second lens component.

The inner structure area and the outer structure area are both planes, the inner structure area and the outer structure area are perpendicular to the optical axis of the second lens, the inner structure area is a glue distribution area, and the second surface of the first lens is bonded with the glue distribution area of the topmost second lens.

The first structure area is higher than the top surface of the second lens barrel.

Wherein the first lens piece and the second lens piece are bonded by a first adhesive material, and the first adhesive material supports the first lens piece and the second lens piece after curing, so that the relative position of the first lens piece and the second lens piece is maintained at the relative position determined by active calibration, wherein the active calibration is a process of adjusting the relative position of the first lens piece and the second lens piece according to an actual imaging result of the optical system; the central axis of the first lens and the central axis of the second lens component form an included angle which is not zero.

The second surface is provided with an optical area for imaging and a second structure area surrounding the optical area, the position of the second structure area is lower than the top surface of the second lens barrel, and the first glue material is located between the outer side surface of the first lens and the extension part.

In the third surface, the position of the adhesive distribution area (inner structure area) is higher than that of the bearing area (outer structure area), and the bearing area (outer structure area) is connected to the adhesive distribution area (inner structure area) through a connecting area.

Wherein the transition region is attached with a light shielding layer.

And the side surface of the protruding part, the first structure area and the outer side surface of the first lens are adhered with a light shielding layer.

The first lens is a single lens or a composite lens formed by mutually embedding a plurality of sub-lenses, and the second lens is provided with a plurality of lenses which are assembled together through the second lens barrel.

Wherein the minimum spacing between the first lens and the second lens at the top is not less than 10 μm.

Wherein the minimum distance between the first lens and the second lens positioned at the topmost part is 30-100 μm.

Wherein at least two adjacent second lenses each have an optical zone, an inner structural zone surrounding the optical zone, and an outer structural zone surrounding the inner structural zone, and the inner structural zone is located higher than the outer structural zone, and the outer structural zone is connected to the outer structural zone by an inclined connecting zone; wherein said at least two adjacent said second lenses form a mosaic, a SOMA sheet is disposed between said at least two adjacent said second lenses, and said SOMA sheet is located between two of said inner structural zones or between two of said outer structural zones.

Wherein the first lens is a molded glass lens.

The top surface of the protruding part is provided with a transition area, the transition area is located at the edge of the top surface, and the transition area is attached with the shading layer.

Wherein the diameter of the cross section of the protrusion is 1.0-2.0 mm.

Wherein the diameter of the cross section of the protrusion is 1.2-1.6 mm.

Wherein the height of the protrusion is 0.3-1.5 mm.

Wherein the height of the protrusion is 0.4-1.1 mm.

Wherein an included angle between a side surface of the protrusion and an optical axis of the optical lens is less than 15 °.

Wherein, the refractive index of the manufacturing material of the first lens is 1.48-1.55.

Wherein the abbe number of the first lens is 50.0-70.1.

Wherein the total height of the first lens is 0.4-1.9 mm.

Wherein the total height of the first lens is 0.6-1.5 mm.

Wherein the outer diameter of the first lens is 3.0-4.0 mm.

Wherein the outer diameter of the first lens is 3.2-3.8 mm.

Wherein one or more of a side surface of the protrusion, the first structural region, and an outer side surface of the first lens is surface roughened.

Wherein an outer side surface of the second barrel or the first lens includes at least one cutting surface.

Wherein the angle of view of the optical lens is greater than 60 °.

Wherein, the ratio of the cross section diameter of the protruding part to the aperture of the light inlet hole of the second lens barrel is 0.3-0.6.

According to another aspect of the present application, there is also provided a camera module, which includes: any one of the above optical lenses; and the optical lens is arranged on the photosensitive assembly.

According to still another aspect of the present application, there is also provided an under-screen camera assembly, including: a display screen having a light passing hole; and the projection of the camera module extends into the light through hole.

According to still another aspect of the present application, there is also provided an optical lens manufacturing method, including: 1) preparing a first lens and a second lens part separated from each other; wherein the first lens has a first surface on the object side and a second surface on the image side, wherein a central region of the first surface is convex toward the object side to form a protrusion, a top surface of the protrusion forms an optical zone for imaging, the first surface further has a first structural zone surrounding the protrusion, and a side surface of the protrusion connects the optical zone and the first structural zone; the second lens component comprises a second lens barrel and at least one second lens mounted on the inner side of the second lens barrel; 2) pre-positioning the first lens and the second lens component so that the at least one second lens and the first lens together form an imageable optical system; 3) actively calibrating the first lens and the second lens component; and 4) bonding the first optic with the second lens component such that the relative position of the first optic and the second lens component is maintained at the relative position determined by the active calibration.

In the step 1), the first lens is manufactured through a glass molding process, and the protrusion is processed through a cutting or polishing process, so that an included angle between the side surface of the protrusion and the optical axis of the optical lens is smaller than 15 °.

According to still another aspect of the present application, there is provided a method for manufacturing a camera module, including: a) manufacturing an optical lens according to any one of the optical lens manufacturing methods; and b) assembling the optical lens and the photosensitive component together to obtain the camera module.

And b), bonding the optical lens and the photosensitive assembly together through a second glue material based on an active calibration process.

Wherein in the step b), active calibration is performed between the second lens part and the photosensitive component, and the active calibration between the first lens part and the second lens part in the step 3) is performed simultaneously with the active calibration between the second lens part and the photosensitive component in the step b).

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

1. the application of optical lens and the module of making a video recording help reducing the aperture of screen trompil.

2. The application of the optical lens and the camera module can reduce the influence of the screen aperture on the field angle of the lens.

3. The optical lens of this application and the module of making a video recording can reduce the influence of parasitic light to the module formation of image of making a video recording.

4. The optical lens and the camera module can improve the imaging quality of the lens.

5. The volume of the lens can be reduced.

6. The application can reduce the space that terminal equipment needs to reserve for the module of making a video recording.

Drawings

FIG. 1 shows a schematic cross-sectional view of an optical lens 1000 of one embodiment of the present application;

FIG. 2 shows a partially enlarged schematic view of a first lens and its peripheral structures in one embodiment of the present application;

FIG. 3 is an enlarged, partial schematic view of a first lens and its peripheral structures in another embodiment of the present application;

FIG. 4 shows a schematic cross-sectional view of a first lens in an embodiment of the present application;

fig. 5 is a schematic cross-sectional view illustrating a camera module according to an embodiment of the present application;

FIG. 6 illustrates a perspective view of an optical lens in one embodiment of the present application;

fig. 7a shows a schematic top view of an example of an optical lens with a single cut surface of the second barrel, fig. 7b shows a schematic top view of an example of an optical lens with two cut surfaces of the second barrel, and fig. 7c shows a schematic top view of an example of an optical lens with four cut surfaces of the second barrel;

fig. 8a is a schematic diagram showing an example of arranging the camera module with the cutting surface at a position close to the frame of the mobile phone, and fig. 8b is a schematic diagram showing another example of arranging the camera module with the cutting surface at a position close to the frame of the mobile phone;

FIG. 9 illustrates a cross-sectional view of an under-screen camera assembly in one embodiment of the present application;

FIG. 10 shows a schematic cross-sectional view of an under-screen camera assembly in another embodiment of the present application;

FIG. 11 illustrates an imaging beam path of an optical lens 1000 in one embodiment of the present application;

fig. 12 shows a schematic cross-sectional view of an optical lens 1000 in an alternative 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. Referring to fig. 1, in the present embodiment, the optical lens 1000 includes a first lens 110 and a second lens component 200. The first lens 110 may be understood as a first lens component, and in this embodiment, the first lens component is formed by a single first lens 110. The first optic 110 is typically a lens. The first lens 110 has a first surface 112 on the object side and a second surface 117 on the image side, wherein a central area of the first surface 112 protrudes to the object side to form a protrusion 111, a top surface 113 of the protrusion 111 forms an optical zone 113a for imaging, the first surface 112 further has a first structural zone 115 surrounding the protrusion 111, and a side surface 114 of the protrusion 111 connects the optical zone 113a and the first structural zone 115. Herein, a structured zone is a non-optical zone, which may also be referred to as an optically inactive zone. In this embodiment, the second lens component 200 includes a second barrel 220 and a plurality of second lenses 210 mounted inside the second barrel 220, wherein the plurality of second lenses 210 and the first lens 110 together form an imaging optical system. The top of the second barrel 220 has an extension portion 221 formed by extending inward, the center of the extension portion 221 forms a light inlet 222 of the second lens component 200, and a second lens located at the topmost position in the at least one second lens 210 has a third surface 211 located at the object side and a fourth surface 212 located at the image side, and the third surface 211 includes an optical area 211a located at the center, an inner structure area 211b surrounding the optical area, and an outer structure area 211c surrounding the inner structure area 211 b. The inner structure region 211b may be a rubberized region. The outer structural region 211c may serve as a bearing region, which may bear against the bottom surface of the extension 221. The inner structure region 211b is exposed outside the extension portion 221 to facilitate the arrangement of the adhesive material. In this embodiment, the second surface 117 of the first lens 110 is bonded to the inner structural area 211b of the topmost second lens 210. Specifically, the second structure region 118 of the second surface 117 of the first lens 110 is bonded to the glue dispensing region of the topmost second lens by the first glue material 300. The first rubber 300 supports the first lens 110 and the second lens part 200 after curing, so that the relative position of the first lens 110 and the second lens part 200 is maintained at the relative position determined by active calibration, wherein the active calibration is a process of adjusting the relative position of the first lens 110 and the second lens part 200 according to an actual imaging result of the optical system. In the active calibration process, the capturing mechanism (e.g., a clamping mechanism) can move the first lens in multiple degrees of freedom by clamping the outer side surface of the first lens, so as to adjust the relative position of the first lens and the second lens component, and further find out a position that can optimize the actual imaging result of the optical system. The actual imaging result here refers to the actual image received and output by the photosensitive chip disposed at the rear end of the second lens. The photosensitive chip may be a photosensitive chip specially used for an active calibration process (in this case, the photosensitive chip may be disposed in an active calibration device), or may be a photosensitive chip in a photosensitive assembly to be actually assembled (in this case, the photosensitive chip for active calibration may be finally assembled with an optical lens to be calibrated to form a camera module). Since the first lens piece has manufacturing tolerances during manufacturing and assembly tolerances between the lenses of the second lens piece, the central axis of the first lens piece and the central axis of the second lens piece may have an angle different from zero after active alignment, thereby compensating for the manufacturing and assembly tolerances. The optical lens of the embodiment is particularly suitable for being used for an under-screen camera module. In the optical lens of this embodiment, because the first lens 110 is exposed outside the second lens barrel 220, the protruding portion 111 can extend into the small hole of the display screen (i.e., the light-passing hole reserved for the camera module under the screen) so that the light incident surface of the optical lens is closer to the upper surface of the display screen, and the influence of the side wall of the small hole of the display screen on the light collected by the optical lens is reduced. The optical lens can obtain a larger angle of view, so that the aperture of the small hole (reserved light-passing hole) of the display screen can be reduced while ensuring the light entering amount of the optical lens. Further, in this embodiment, the first lens is fixed to the second lens component by bonding the bottom surface of the first lens (e.g., via the second structure region of the second surface) to the upper surface (i.e., the third surface) of the second lens, and this design can expose the first lens, thereby facilitating active alignment. The first lens is specially designed, especially with the protrusion 111, and the difficulty of molding the first lens may be higher than that of a normal lens (e.g., a second lens). The manufacturing tolerance of the first lens may be higher than that of the ordinary lens, and the consistency of the optical parameters and performance of the first lens may be insufficient in mass production, and if the above factors are not considered, the actual imaging quality of the optical lens in actual mass production may be not as good as expected, resulting in a series of problems such as reduction of production yield. In the embodiment, the problems of manufacturing tolerance or insufficient consistency and the like of the first lens can be avoided or suppressed through the active calibration process, so that the imaging quality of actual mass production products is ensured, and the production yield is improved. In the solution of the present application, the top surface of the second barrel may have a larger aperture, specifically, the diameter of the outer side surface of the first lens (i.e. the outer diameter of the first lens) is smaller than the aperture of the top surface of the second barrel. Considering the manufacturing tolerance, when the diameter of the outer side surface of the first lens is smaller than 105% of the aperture of the top surface of the second barrel, it can be considered that the diameter of the outer side surface of the first lens is smaller than the aperture of the top surface of the second barrel. Note that, since the aperture of the light entrance hole of the second barrel may vary along the optical axis, the aperture of the top surface of the second barrel cannot be directly equal to the aperture of the light entrance hole of the second barrel. In practice, the aperture of the top surface of the second barrel is the aperture of the section of the light entrance hole of the second barrel closest to the object side.

Further, still referring to fig. 1, in an embodiment of the present application, the bonding surfaces of the first lens 110 and the second lens 210 (which can be understood as the area of the bottom surface of the first lens contacting with the first adhesive material and the area of the third surface of the second lens contacting with the first adhesive material) are both configured as a plane. The optical lens may encounter a high-temperature and high-humidity environment or a mechanical impact environment, and the bonding surface of the first lens 110 and the second lens 210 is set to be a plane, so that the influence of the variation of the first rubber material 300 caused by the environment on the relative position of the first lens 110 and the second lens part 200 in the horizontal direction can be reduced, and the problem of the reduction of the imaging quality of the optical lens caused by the variation of the first rubber material 300 can be solved or alleviated. In this embodiment, the bonding surface of the second lens can be understood as the adhesive distribution area of the third surface, i.e. the inner structure area 211 b.

Further, still referring to fig. 1, in an embodiment of the present application, the first structure region 115 of the first surface 112 may be located higher than the top surface of the second barrel 220. This design may facilitate the grip (or gripper) holding the outer side of the first lens (i.e., the periphery of the optically inactive area) to accomplish active alignment. Further, in a preferred embodiment, the height difference between the first structure region 115 and the top surface of the second barrel 220 is greater than one-half of the height of the outer side surface of the first lens 110. Here, the outer side surface height refers to a dimension of the outer side surface 116 in the optical axis direction of the optical lens. With this design, at least one half area (at least the upper half) of the outer side surface can be conveniently clamped during the active calibration process to facilitate the active calibration. Further, in the embodiment of fig. 1, the bottom surface (i.e., the second structure region 118) of the first lens 110 is lower than the top surface of the second barrel 220, i.e., a portion of the first lens 110 may extend into the light inlet 222 formed by the extension portion 221 of the second barrel 220. However, it should be noted that in other embodiments of the present application, the second structure region 118 may be higher than the top surface of the second barrel 220.

Further, fig. 2 shows a partially enlarged schematic view of the first lens and its peripheral structure in an embodiment of the present application. Referring to fig. 1 and fig. 2, in this embodiment, an ink layer is attached to a side surface 114 of the protruding portion 111 of the first lens 110, a first structure region 115 of the first surface 112, and an outer side surface 116 of the first lens 110. The second surface 117 has an optical area for imaging and a second structural area 118 surrounding the optical area, and further, in an embodiment, the second structural area 118 of the second surface 117 may be adhered with an ink layer. The ink layer may be deposited on the first lens 110 to reduce stray light. In addition, the ink layer can also play the role of a diaphragm so as to control the light quantity entering the camera module. That is, the stop of the optical lens is disposed on the first surface of the first sheet of the mirror. In other embodiments of the present application, the ink layer may be replaced by a light shielding layer formed by other materials and attached to the above-mentioned area of the first lens, for example, an opaque material may be attached in a plating manner to form the light shielding layer.

Further, still referring to fig. 1, in an embodiment of the present application, in the optical lens, the second lens 210 has a plurality and the plurality of second lenses 210 are assembled together through the second barrel 220. Specifically, the inner surface of the second barrel 220 may form a plurality of steps, and the second lenses 210 may be sequentially fitted into the plurality of steps from small to large when the second lenses 210 are assembled. When the plurality of second lenses 210 are assembled together, the positions of the lenses are fixed, thereby forming a stable lens group.

Further, still referring to fig. 1, in one embodiment of the present application, in the third surface 211 of the second lens, the glue dispensing area (i.e., the inner structure area 211b) may be located higher than the bearing area (i.e., the outer structure area 211c), and the bearing area may be connected to the glue dispensing area by a connecting area. In this embodiment, the inner structural region and the outer structural region are both planar and perpendicular to the optical axis of the second lens. The connecting region may then be inclined. The connection region of the topmost second lens may be attached with a light shielding layer so as to prevent or suppress stray light from entering the optical system for imaging from a gap between the second barrel 220 and the second lens 210 (i.e., to prevent or suppress stray light from entering the imaging beam path). In this embodiment, the glue dispensing area of the topmost second lens is higher than the rest area, so that the thickness of the second lens at the inner structure area 211b can be increased (i.e. the thickness of the second lens at the inner structure area 211b can be greater than that of the second lens at the outer structure area c). The design can increase the reliability of the second lens, so that the second lens is not easy to deform in the assembling process of the second lens part and the using process of the camera module, and the difficulty of the second lens forming process can be reduced. Particularly in the injection molding process, if the connecting portion between the optical inactive area (i.e. the structure area) and the optical area is too thin, the molding precision of the optical inactive area and the optical area is reduced, and the imaging quality of the optical lens is reduced, and this problem can be better overcome by the design scheme in which the glue distribution area of the second lens is higher than the bearing area.

In the foregoing embodiments, the first lenses are all single independent lenses, but the application is not limited thereto. For example, in another embodiment of the present application, the first lens may be a composite lens in which a plurality of sub-lenses are fitted to each other. In the active calibration stage, the composite lens can be moved as a unit and adjusted in relative positional relationship with the second lens component.

Further, still referring to fig. 1, in an embodiment of the present application, in the optical lens 1000, under the premise of being assembled by the second barrel 220, the plurality of second lenses 210 may also be embedded with each other, so as to further improve the stability of the lens group. Further, a spacer may be disposed between the second lenses 210 to improve the stability of the optical lens structure.

Further, still referring to fig. 1, in an embodiment of the present application, in the second lens part 200 of the optical lens 1000, there may be a plurality of second lenses 210 having inner structure areas 211b and outer structure areas 211c, and for a single second lens 210, the inner structure area 211b is higher than the outer structure area 211 c. These second lenses having two structural regions with different heights can be fitted to each other, and a spacer (e.g., a SOMA plate) is disposed between the inner structural regions 211b of the adjacent second lenses. The spacer may have a light blocking effect to create the desired imaging beam path. Referring to fig. 1, with this design of the present embodiment, the inner structural regions of the second lenses 210 can be located closer to the optical axis than the extended portions. Further, fig. 11 shows an imaging beam path of the optical lens 1000 in an embodiment of the present application. Referring to fig. 11, it can be seen that, in the present embodiment, the diameter of the imaging beam path may be reduced and then expanded from the object side to the image side. It should be noted that in the embodiment shown in fig. 1 and fig. 11, the inner structure region 211b and the outer structure region 211c may be located on not only the object-side surface of the second lens 210, but also the image-side surface of the second lens 210. For some or some of the second lenses 210 (e.g., the second lens at the bottom most end), it may have only a single structured area, i.e., the structured area is a continuous plane with no height differences. For some or all of the second lenses 210 (e.g., the second lens from the bottom), only the object side surface may have inner and outer

structural regions

211b, 211c, while the image side surface may have only a single structural region, i.e., the structural region of the image side surface is a continuous plane with no height differences.

Further, in an embodiment of the present application, since the height of the protruding portion of the first lens is relatively high, the influence on the light transmittance of the optical lens is large, so that the photosensitive chip of the camera module can acquire more imaging light, and the first lens can be made of a glass material. And further, since the light incident surface of the first lens is generally aspheric, the first lens may be a molded glass lens. The molding principle of the molded glass lens comprises the following steps: the glass blank with the initial shape is placed in a precision processing forming die, the temperature is raised to soften the glass, and then the surface of the die core is pressed to deform the glass under stress, and the glass is taken out in a die separation mode, so that the required lens shape can be formed. The molded glass is manufactured by a molding die, and the protrusion side wall of the molded first lens may not be exactly parallel to the optical axis, for example, there may be a large included angle (i.e., a protrusion side wall inclination angle) between the protrusion side wall and the optical axis. The first lens can be ground by a cold working technique such that the sidewall of the protrusion of the first lens forms an angle of less than 15 ° with the optical axis. This prevents the maximum diameter of the projection (i.e., the diameter of the root of the projection) from becoming too large due to an excessively large inclination angle of the side wall of the projection. Too large a diameter at the root of the projection will result in the aperture of the display screen having to be increased.

Further, fig. 3 shows a partially enlarged schematic view of the first lens and its peripheral structure in another embodiment of the present application. In this embodiment, the top surface 113 of the protrusion 111 has an optical area 113a and a transition area 113b, the transition area 113b is located at the edge of the top surface 113, and the transition area 113b can be adhered with an ink layer. In this embodiment, the first lens 110 has a special shape (e.g. it has a protrusion 111), and the molding precision at the edge of the lens may be difficult to control during the molding and mold opening process of the molded glass. Therefore, in this embodiment, a transition area 113b is formed between the top 113 and the sidewall 114 of the protrusion 111 of the first lens 110, and the transition area 113b may be provided with (i.e., attached with) a light-shielding material so that light cannot penetrate through the area to reduce the influence of the area on the optical imaging. Preferably, the transition region has a width of about 0.03-0.05mm from the side wall of the protrusion toward the center position (the width refers to a radial dimension, i.e., a dimension in a direction perpendicular to the optical axis of the optical lens). In other embodiments, the width of the transition zone may be other values depending on the precision of the molding of the molded glass. Further, in other embodiments of the present application, the first lens may be molded from other materials besides glass. Other materials may also have less precision in forming the edge of the top surface of the tab, and thus the edge of the top surface of the tab may also have the transition region.

Further, fig. 4 shows a schematic cross-sectional view of the first lens in an embodiment of the present application. Referring to FIG. 4, in one embodiment of the present application, the diameter L1 of the cross-section of the protrusion may be 1.0-2.0 mm. Preferably, the diameter L1 of the cross section of the protrusion may be 1.2-1.6 mm. The above parameter ranges can be applied to the first lens made of glass, but it should be noted that the parameter ranges are not limited to glass, and they can also be applied to the first lenses made of other materials.

Further, still referring to fig. 4, the first lens is directly bonded to the glue dispensing area of the second lens, and compared with the first lens bonded to the extending portion of the second lens barrel, the structural area of the first lens may further extend downward, so that the height of the protruding portion of the first lens may be relatively higher (referring to the comparative example in which the first lens is directly bonded to the top surface of the second lens barrel, the height of the protruding portion of the first lens of the present embodiment may be relatively higher), and the minimum thickness of the barrel extending portion is about 0.3mm for supporting the lens. In one embodiment of the present application, the first lens may have an overall height H2 of 0.3-1.5 mm. Preferably, the total height H2 of the first lens may be 0.4-1.1 mm. Wherein a height of the protrusion is a height of the first structure region of the first surface to an arc top of the protrusion, the height being a dimension in an optical axis direction of the optical lens. The above parameter ranges can be applied to the first lens made of glass, but it should be noted that the parameter ranges are not limited to glass, and they can also be applied to the first lenses made of other materials.

Further, still referring to fig. 4, in one embodiment of the present application, the total height H2 of the first lens can be 0.4-1.9 mm. Preferably, the total height H2 of the first lens may be 0.6-1.5 mm. Wherein the total height of the first lens is a height of the second structure region of the second surface to an arc top of the protrusion, the height being a dimension in an optical axis direction of the optical lens. The above parameter ranges can be applied to the first lens made of glass, but it should be noted that the parameter ranges are not limited to glass, and they can also be applied to the first lenses made of other materials. Referring to FIG. 4, in the present embodiment, the thickness of the structural region of the first lens is equal to the first lens overall height H2-the protrusion height H1. Generally, the smaller the thickness of the structural region of the first lens is, the better the protrusion 111 protrudes into the light-passing hole of the display screen. However, if the thickness of the structural zone is too small, the first lens tends to bend during clamping and movement, which may result in the active alignment failing to achieve the desired result, resulting in reduced imaging quality. Specifically, if the thickness of the structural region is too small, the fixture may bend the first lens when holding the first lens, and although the bending may be very small, since the optical system (especially the optical system of the mobile phone camera module) is very precise and sensitive, even if the very small first lens deforms, the imaging result obtained by the photosensitive chip may be varied, and thus the active calibration may not achieve the desired effect.

Further, still referring to FIG. 4, in one embodiment of the present application, the outer diameter L2 of the first lens may be 3.0-4.0 mm. Preferably, the outer diameter L2 of the first lens can be 3.2-3.8 mm. If the outer diameter L2 is too small, it may result in a smaller area available for placement of the first glue material, affecting the robustness and reliability of the bond. If the outer diameter L2 is too large, the first lens tends to bend during clamping and movement, which may result in the active alignment failing to achieve the desired result, and thus, in reduced imaging quality. Specifically, if the outer diameter L2 of the first lens is too large, the fixture may bend the first lens when holding the first lens, and although the bending may be very small, since the optical system (especially the optical system of the mobile phone camera module) is very precise and sensitive, even a very small deformation of the first lens may cause a variation in the imaging result obtained by the sensor chip, thereby causing the active calibration to fail to achieve the desired effect.

The above parameter ranges can be applied to the first lens made of glass, but it should be noted that the parameter ranges are not limited to glass, and they can also be applied to the first lenses made of other materials.

Further, with reference to FIG. 1 in combination, in one embodiment of the present application the first lens has a protrusion with a cross-sectional diameter L1 of 1.0-2.0mm and a height H1 of 0.3-1.5 mm. The protrusion provides a greater thickness of the first lens at the optical zone, which increases the difficulty of optical design. Generally, the ratio of the diameter of the imaging surface of the first lens to the diameter of the imaging surface of the third surface of the second lens is about 0.80-1.25. Further, since the first lens is adhered to the adhesive dispensing area of the second lens, a larger adhesive area is provided to meet the requirement of the adhesive force between the first lens and the second lens, and thus the width of the adhesive dispensing area may be greater than 0.3mm (the width refers to the radial dimension, i.e. the dimension perpendicular to the optical axis). Preferably, the width of the glue distribution area is between 0.5mm and 0.8mm, so that glue distribution is satisfied, and the radial dimension of the second lens component is prevented from being too large as much as possible. In view of the above parameter limitations, and further considering the necessary size occupied by the connection area between the second lens optical area 211a and the inner structure 211b (dispensing area), and the connection area between the inner structure area 211b (dispensing area) and the outer structure area 211c (leaning area), in this embodiment, the aperture of the second barrel extension is greater than 2.5 mm. Preferably, the aperture of the second barrel extension is between 3.0mm-4.4 mm. The ratio of the cross section diameter of the first lens protruding part to the aperture of the second lens cone extending part (namely the aperture of the light inlet hole of the second lens cone) is about 0.3-0.6. Preferably, the ratio of the cross-sectional diameter of the first lens protrusion to the aperture of the second barrel extension may be 0.35-0.5.

Further, in one embodiment of the present application, a diameter of a cross section of the protruding portion of the first lens is less than one third of an outer diameter of the second barrel. The outer diameter of the second lens barrel refers to the outer diameter of the position where the outer size of the second lens barrel is largest. The position where the outside dimension of the second barrel is largest is generally located at the bottom of the second barrel (i.e., the side of the optical system close to the image side). Generally, the second lenses are sequentially embedded into the second lens barrel from small to large, and the lens with the largest size is usually located at the bottom end, so the position with the largest outer size of the second lens barrel is also usually located at the bottom of the second lens barrel. However, it should be noted that, in special cases, the position where the outside dimension of the second barrel is largest may be located at other positions. Further, in a preferred embodiment, the outer diameter of the second barrel (i.e., the outer diameter of the second barrel where the outer dimension is largest) is not less than 4 mm.

Further, in one embodiment of the present application, the first lens is made of a material having a refractive index of 1.48 to 1.55. The abbe number of the first lens may be 50.0-70.1. The first lens is generally aspheric and, when the first lens is made of a glass material, the first lens is generally made by a process of molding glass. Since the molded glass needs to be processed by pressing the glass with a mold, the damage to the mold is usually large when the molded glass is used to manufacture a biconcave lens, and therefore, the first surface (i.e., the object side) of the first lens is preferably a convex surface. In this embodiment, the first lens has a thicker thickness relative to the lateral dimension, and accordingly, the refractive index of the lens forming material is preferably 1.48 to 1.55, and the abbe number of the first lens is preferably 50.0 to 70.1, so that the imaging quality of the split lens can be better controlled.

Further, in one embodiment of the present application, the field angle (i.e., FOV) of the optical lens is greater than 60 °. As described above, the optical lens of the present application has the first lens, and the first lens has the protrusion, which can extend into the light-passing hole with a smaller aperture (referred to as the light-passing hole of the display screen), so that the light incident surface (the optical area of the first surface of the first lens) of the optical lens can be closer to the upper surface of the display screen, and the angle of view of the optical lens is relatively less affected by the diameter of the small hole of the display screen. Therefore, in the present embodiment, the angle of field (i.e., FOV) of the optical lens may be greater than 60 °. Preferably, the angle of view of the optical lens may be greater than 75 °.

Further, in one embodiment of the present application, the thickness of the ink layer of the first lens is greater than 5 μm. Preferably, in order to make the ink layer have a good light shielding effect and at the same time make the thickness of the ink layer have a small influence on the height H1 of the protrusion 111, the thickness of the ink layer of the first lens may be 15-30 μm.

Further, in one embodiment of the present application, a side surface of the protrusion, the first structure region of the first surface, an outer side surface of the first lens, and the second structure region of the second surface of the first lens are subjected to a surface roughening treatment. The inner structural zone, the outer structural zone and the connecting zone (the connecting zone between the inner structural zone and the outer structural zone) of the topmost second lens may also be subjected to a surface roughening treatment. The surface roughening treatment can be achieved, for example, by means of grinding. The area of the first lens is subjected to roughening treatment, so that the influence of stray light on lens imaging can be reduced, the bonding strength of the ink layer and the lens can be improved, the ink is not easy to fall off in the use process of the lens, and the influence of dirt on lens imaging is reduced. In a variant embodiment, the area of surface roughening treatment may also be one, two or three of a side of the protrusion, the first structure zone of the first surface, an outer side of the first lens, and the second structure zone of the second surface.

Further, fig. 12 shows a schematic cross-sectional view of an optical lens 1000 in an alternative embodiment of the present application. Referring to fig. 12, in the present embodiment, the bonding position of the first lens and the second lens component is different from that of the embodiment of fig. 1. The present embodiment realizes the bonding of the first lens and the second lens component by bonding the first lens and the side surface of the extension portion of the second lens barrel. The side surface of the extending portion may be understood as a hole wall of the light entrance hole of the second lens component (second barrel). The aperture of the light inlet can be gradually reduced from the object side to the image side so as to arrange the first rubber material, and the outer side surface of the first lens is bonded with the hole wall of the light inlet. Except for the bonding position, the remaining structure and connection relationship of this embodiment may refer to the embodiment of fig. 1, and are not described again.

It should be noted that in the above embodiments, the minimum gap between the first lens and the topmost second lens is not less than 10 μm, and preferably, the minimum gap may be 30-100 μm. The minimum gap is sized to provide adequate adjustment clearance for the active alignment, i.e., to ensure that the first lens does not interfere with the second lens during active alignment (i.e., they do not collide with each other during active alignment). The minimum gap may be a gap where the first rubber material is arranged, or may be a gap at another position.

Further, fig. 5 shows a schematic cross-sectional view of a camera module according to an embodiment of the present application. Referring to fig. 5, according to an embodiment of the present application, there is provided a camera module including an optical lens 1000 and a photosensitive member 2000. The optical lens 1000 is mounted on the photosensitive assembly 2000. Specifically, the optical lens 1000 may be adhered to the photosensitive assembly 2000 through the second adhesive material 400. The optical lens may be the optical lens shown in fig. 1, and the detailed structure thereof is not described herein. The photosensitive assembly 2000 may include a photosensitive chip 2001, a wiring board 2002, a color filter 2003, a mirror base 2004, and an electronic component 2005. The photosensitive chip 2001 is attached to the upper surface of the wiring board 2002. A mirror base 2004 is mounted on the upper surface of the circuit board 2002 and surrounds the photosensitive chip 2001. The top surface of the base may serve as a mounting surface for the optical lens 1000. The color filter 2003 is mounted to the mirror mount 2004. The upper surface of the wiring board may also mount electronic components 2005. The photo sensor chip 2001 and the circuit board 2002 can be electrically connected by wire bonding (also called "wire bonding"). The connecting wire can be a gold wire or other metal wires with good conductivity.

Further, in an embodiment of the present application, a total optical length (TTL) of the camera module may be 3.4-4.4 mm.

Further, in an embodiment of the present application, in the optical lens, a side surface of the second barrel may have a cut surface. Fig. 6 shows a perspective view of an optical lens 1000 in an embodiment of the present application. Referring to fig. 6, in one embodiment of the present application, an optical lens 1000 includes a first lens 110 and a second lens component. Wherein the second lens part includes a second barrel 220 and a plurality of second lenses (the second lenses are hidden in fig. 6) mounted in the second barrel 220. The first lens 110 is adhered to the top surface of the second barrel 220. In this embodiment, the outer side surface 223 of the second barrel 220 has a cutting surface 224. This cut-away surface 224 may allow the front camera module to be placed closer to the bezel of the housing of the electronic device (e.g., cell phone). Fig. 7a, 7b, and 7c are schematic top views illustrating three second barrel cutting methods, respectively. Specifically, fig. 7a shows a schematic top view of an example of an optical lens in which the second barrel has a single cut surface, fig. 7b shows a schematic top view of an example of an optical lens in which the second barrel has two cut surfaces, and fig. 7c shows a schematic top view of an example of an optical lens in which the second barrel has four cut surfaces. In fig. 7a, 7b, 7c, the hatched area indicates the cut area. Further, fig. 8a is a schematic diagram showing an example of disposing the camera module with the cutting surface at a position close to the frame of the mobile phone, and fig. 8b is a schematic diagram showing another example of disposing the camera module with the cutting surface at a position close to the frame of the mobile phone. It can be seen that the side face of the second lens barrel is cut, so that the camera module is favorably arranged at a position closer to a frame of a mobile phone. As shown in fig. 8a, the optical lens 1000 of the front camera module may have a cut surface, and the cut surface may be disposed proximate to the top frame 10 of the terminal device (e.g., mobile phone). As shown in fig. 8b, the optical lens 1000 of the front camera module may have four cut surfaces, wherein the cut surfaces on the top and right sides may be respectively disposed next to the top frame 10a and the right frame 10b of the terminal device (e.g., mobile phone). In fig. 8a and 8b, the x and y coordinate axes respectively represent two coordinate axes of a rectangular coordinate system on a plane perpendicular to the optical axis of the camera module (i.e., a plane on which the display screen surface is located).

Further, in another embodiment, the outer side surface of the first lens may also include a cutting surface, and the cutting surface may be one or more. The cutting pattern can be seen in fig. 7a, 7b, 7 c.

Further, fig. 9 shows a schematic cross-sectional view of an under-screen camera assembly in an embodiment of the present application. Referring to fig. 9, there is also provided, in accordance with an embodiment of the present application, an under-screen camera assembly, including: a display screen 3000 and a camera module (note that only the optical lens thereof is shown in fig. 9, and the photosensitive element thereof is not shown). The display screen 3000 has a light-passing hole 3002. Specifically, the display screen 3000 has a front surface and a back surface, wherein the front surface is a surface on which an image is displayed, and the back surface is an opposite surface. In the subassembly of making a video recording under the screen, display screen 3000 has logical unthreaded hole 3002 to external light gets into the module of making a video recording that is located under the screen. The light hole 3002 may be a through hole or a blind hole. The front surface of the display screen 3000 may be covered with a transparent cover 3001, and the cover 3001 may not be perforated at the light passing hole 3002 (as shown in fig. 9). When the cover plate 3001 is not pierced, that is, the cover plate 3001 is complete, a better dustproof and protective effect can be achieved. It is noted that in other embodiments, the cover plate may also be perforated at the clear aperture 3002. Further, in this embodiment, the optical lens of the image capturing module may be the optical lens 1000 shown in fig. 1, the optical lens has a first lens 110, and the first lens 110 has a protrusion 111. In this embodiment, the protrusion 111 extends into the light hole 3002. The display panel 3000 may further include a substrate 3003, and the substrate 3003 is located on the back surface of the display panel 3000, since the substrate 3003 may also be referred to as a back plate. In this embodiment, the first structure region of the first surface (i.e. the upper surface) of the first lens 110 of the camera module can be abutted against the bottom surface of the substrate 3003. The first structure region of the first surface is supported on the bottom surface of the substrate, so that the light incident surface of the optical lens is closer to the upper surface of the display screen (or closer to the cover plate). In this way, the optical lens can obtain a larger field angle (the field angle is indicated by a dotted line in fig. 9), and the aperture of the light through hole of the display screen can be reduced on the premise of ensuring the light entering amount of the optical lens, so that the visual effect and the user experience of the display screen are improved. In this embodiment, the gap between the protrusion 111 and the display screen cover 3001 (or referred to as a cover layer) may be 0.08-0.5 mm. The gap between the protrusion 111 and the display panel cover 3001 can be understood as a gap between the arc top of the top surface of the protrusion 111 and the display panel cover 3001. In this embodiment, the non-optical area of the first lens may further include a light shielding layer, and specific contents refer to fig. 2, fig. 3 and the corresponding embodiments in the foregoing, which are not described herein again.

Fig. 10 shows a schematic cross-sectional view of an under-screen camera assembly in another embodiment of the present application. Referring to fig. 10, in another embodiment of the present application, the substrate 3001 (or the back plate) of the display screen 3000 may have an opening 3004 and the diameter of the opening 3004 is larger than the diameter of the outer side surface of the first lens 110 (the meaning of the outer side surface can refer to the description of fig. 1 and the corresponding embodiment). The opening 3004 of the substrate 3003 may also be referred to as a mounting hole. The first structured area of the first surface (i.e., the upper surface) of the first lens 110 can be located within the aperture 3004 and bear against the display screen 3000. That is, at least a portion of the outer side surface of the first lens 110 is disposed in the opening 3004 (i.e., the mounting hole) of the substrate 3003. In this embodiment, the protrusion 111 can extend into the light hole 3002 of the display screen 3000 more fully, so that the light incident surface of the optical lens is closer to the upper surface of the display screen (or closer to the cover plate). In this way, the optical lens can obtain a larger field angle (the field angle is indicated by a dotted line in fig. 10), and the aperture of the light through hole of the display screen can be reduced on the premise of ensuring the light entering amount of the optical lens, so that the visual effect and the user experience of the display screen are improved. In this embodiment, the gap between the protrusion and the display screen cover (or referred to as a cover layer) may be 0.08-0.5 mm. The gap between the protrusion 111 and the display panel cover 3001 can be understood as a gap between the arc top of the top surface of the protrusion 111 and the display panel cover 3001. In this embodiment, the non-optical area of the first lens may further include a light shielding layer, and specific contents refer to fig. 2, fig. 3 and the corresponding embodiments in the foregoing, which are not described herein again.

In the above embodiments, the display screen may be an OLED display screen or an LCD display screen.

Further, according to an embodiment of the present application, there is provided an optical lens manufacturing method including the following steps S1-S4.

In step S1, a first lens piece and a second lens piece separated from each other are prepared. Still referring to fig. 1, the first lens 110 has a first surface 112 on the object side and a second surface 117 on the image side, wherein a central area of the first surface 112 is convex toward the object side to form a protrusion 111, a top surface 113 of the protrusion 111 forms an optical zone 113a for imaging, the first surface 112 further has a first structural zone 115 surrounding the protrusion 111, and a side surface 114 of the protrusion 111 connects the optical zone 113a and the first structural zone 115. The second lens component 200 includes a second barrel 220 and a plurality of second lenses 210 mounted inside the second barrel 220, wherein the plurality of second lenses 210 and the first lens 110 together form an imageable optical system.

In step S2, the first lens 110 and the second lens section 200 are pre-positioned. In this step, the first lens 110, the second lens part 200, and the photosensitive component (which may be a photosensitive component to be assembled, or a photosensitive component or a photosensitive chip provided in the active calibration device) are arranged along the optical axis, so that an optical system formed by the first lens 110 and the second lens part 200 can image. At this time, the first lens 110 and the second lens part 200 may be regarded as a split type lens. In this embodiment, the second lens component 200 may be disposed on a stage, the stage may have a light-passing hole, and the photosensitive component may be disposed below the light-passing hole of the stage. The first lens 110 can be gripped and moved by a six-axis movable gripper. Six of which will be explained in detail in step S3. The gripper may grip the outer side of the first lens to capture and move the first lens 110. In this embodiment, the outer side surface of the first lens may partially extend into the light inlet of the second barrel, so that the clamp may clamp only the upper half of the outer side surface of the first lens, that is, only the portion of the outer side surface of the first lens close to the object side. In another embodiment, the gripper can capture and move the first lens 110 by gripping the sides of the protrusion.

And step S3, performing active calibration. In this step, the photosensitive component is powered on to obtain an image formed by the split-type lens, the imaging quality and the adjustment amount of the split-type lens are calculated through image algorithms such as SFR and MTF, and the relative position between the first lens component (i.e., the first lens 110 in this embodiment) and the second lens component is actively adjusted in real time in at least one direction of the six-axis direction according to the adjustment amount. After one or more times of adjustment, the imaging quality (mainly comprising optical parameters such as peak value, field curvature, astigmatism and the like) of the split type lens reaches a target value. The six-axis direction may be an x, y, z, u, v, and w direction, where the x, y, and z directions are horizontal and vertical directions, that is, directions of three coordinate axes in a three-dimensional rectangular coordinate system, and the u, v, and w directions are directions rotating around the x, y, and z axes, respectively.

In step S4, the first lens 110 and the second lens part 200 are bonded together by the first adhesive material 300. The first glue 300 may be cured to maintain the first lens 300 and the second lens component 200 in relative positions determined by the active calibration.

In the above embodiment, the first glue material may be disposed before the pre-positioning (i.e., step S2), or may be disposed after the active calibration (i.e., step S3) is completed. When the first adhesive material is disposed after the active calibration (i.e., step S3) is completed, the first lens component is removed, and then the first adhesive material is disposed in the adhesive dispensing region (inner structure region) of the second lens at the top of the second lens component (or disposed on the sidewall of the light inlet hole of the second lens component), and then step S4 is performed to cure the first adhesive material. The first glue material is suitable for curing by at least one of visible light, ultraviolet rays, baking and the like.

Further, in an embodiment of the present application, in step S1, the first lens is manufactured by a glass molding process, and the protrusion is processed by a removing process such as cutting or grinding, so that an included angle between a side surface of the protrusion and an optical axis of the optical lens is less than 15 °.

Further, according to an embodiment of the present application, there is provided a method for manufacturing a camera module, which includes step a and step b.

Step a, an optical lens is manufactured according to the optical lens manufacturing method (steps S1-S4) in the foregoing embodiment.

And b, assembling the optical lens and the photosensitive component together to obtain a camera module.

And b, bonding the optical lens and the photosensitive assembly together through a second glue material based on an active calibration process. In one embodiment, the optical lens may be assembled first, and then the optical lens and the photosensitive component may be assembled. The process of assembling the optical lens and the photosensitive component may be a conventional active calibration process (AA process, which refers to an active calibration process without adjusting the optical system itself, i.e., the lens and the photosensitive component are bonded and fixed by adjusting the relative position between the optical lens and the photosensitive component), or a conventional bracket attachment process (HA process, i.e., the lens is directly attached to the photosensitive component by mechanical positioning such as visual recognition).

Further, in another embodiment of the present application, in the step b, active calibration may be performed between the second lens component and the photosensitive component. Also, the active calibration between the first lens and the second lens component in the step S3 and the active calibration between the second lens and the photosensitive component in the step b may be performed simultaneously. And then the first lens and the second lens component are respectively bonded (which can be bonded by a first adhesive material) and the second lens component and the photosensitive assembly (which can be bonded by a second adhesive material), so as to form a complete camera module.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An optical lens, comprising:

a first lens having a first surface on an object side and a second surface on an image side, wherein a central region of the first surface is convex toward the object side to form a protrusion, a top surface of the protrusion forms an optical zone for imaging, the first surface further has a first structural zone surrounding the protrusion, and a side surface of the protrusion connects the optical zone and the first structural zone; and

a second lens component including a second barrel and at least one second lens mounted inside the second barrel, wherein the at least one second lens and the first lens together form an imageable optical system, the top of the second barrel has an extension portion formed by extending inward, the center of the extension portion forms a light inlet of the second lens component, and the second lens located at the topmost position in the at least one second lens has a third surface located on the object side and a fourth surface located on the image side, the third surface includes an optical area located at the center, an inner structural area surrounding the optical area, and an outer structural area surrounding the inner structural area, the outer structural area bears against the bottom surface of the extension portion, and the inner structural area is exposed outside the extension portion;

wherein the first lens is adhered to the second lens component, and the outer diameter of the first lens is not larger than the aperture of the light inlet of the second lens component.

2. An optical lens according to claim 1, wherein the inner and outer structural zones are planar, the inner and outer structural zones are perpendicular to the optical axis of the second lens, the inner structural zone is a glue dispensing zone, and the second surface of the first lens is bonded to the glue dispensing zone of the topmost second lens.

3. An optical lens according to claim 1, wherein the first structure region is located higher than a top surface of the second barrel.

4. An optical lens according to claim 1, wherein the first lens and the second lens component are bonded by a first glue material, and the first glue material supports the first lens and the second lens component after curing, so that the relative positions of the first lens and the second lens component are maintained at the relative positions determined by active calibration, wherein the active calibration is a process of adjusting the relative positions of the first lens and the second lens component according to an actual imaging result of the optical system; the central axis of the first lens and the central axis of the second lens component form an included angle which is not zero.

5. The optical lens of claim 4, wherein the second surface has an optical area for imaging and a second structure area surrounding the optical area, the second structure area is lower than the top surface of the second barrel, and the first adhesive material is located between the outer side surface of the first lens and the extension portion.

6. An optical lens according to claim 3, characterized in that in the third surface the inner structure region is located higher than the outer structure region, the inner structure region being connected to the outer structure region by a connecting region.

7. An optical lens according to claim 6, wherein the connection region is attached with a light shielding layer.

8. The optical lens barrel according to claim 1, wherein a light shielding layer is attached to a side surface of the protruding portion, the first structure region, and an outer side surface of the first lens.

9. The optical lens according to claim 1, wherein the first lens is a single lens or a composite lens in which a plurality of sub-lenses are fitted to each other, and the second lens has a plurality of sub-lenses and the plurality of sub-lenses are assembled together by the second barrel.

10. An optical lens according to claim 1, characterized in that the minimum distance between the first lens and the second lens at the top is not less than 10 μm.

11. An optical lens according to claim 10, characterized in that the minimum separation between the first lens and the second topmost lens is 30-100 μm.

12. An optical lens according to claim 1, characterized in that at least two adjacent second lenses each have an optical zone, an inner structural zone around the optical zone and an outer structural zone around the inner structural zone, and the inner structural zone is located higher than the outer structural zone, and the outer structural zone is connected to the outer structural zone by an inclined connecting zone; wherein said at least two adjacent said second lenses form a mosaic, a SOMA sheet is disposed between said at least two adjacent said second lenses, and said SOMA sheet is located between two of said inner structural zones or between two of said outer structural zones.

13. An optical lens according to claim 1, characterized in that the first lens is a molded glass lens.

14. An optical lens according to claim 1, wherein the top surface of the protrusion has a transition region at an edge of the top surface, the transition region being attached with a light-shielding layer.

15. An optical lens according to claim 1, characterized in that the diameter of the cross section of the protrusion is 1.0-2.0 mm.

16. An optical lens according to claim 1, characterized in that the diameter of the cross section of the protrusion is 1.2-1.6 mm.

17. An optical lens according to claim 1, characterized in that the height of the protrusions is 0.3-1.5 mm.

18. An optical lens according to claim 1, characterized in that the height of the protrusions is 0.4-1.1 mm.

19. An optical lens according to claim 1, characterized in that the angle between the side of the protrusion and the optical axis of the optical lens is less than 15 °.

20. An optical lens according to claim 1, characterized in that the first lens is made of a material having a refractive index of 1.48-1.55.

21. An optical lens according to claim 1, characterized in that the abbe number of the first optic is 50.0-70.1.

22. An optical lens according to claim 17, characterized in that the total height of the first lens is 0.4-1.9 mm.

23. An optical lens according to claim 18, characterized in that the total height of the first lens is 0.6-1.5 mm.

24. An optical lens according to claim 15, characterized in that the outer diameter of the first lens is 3.0-4.0 mm.

25. An optical lens according to claim 16, characterized in that the outer diameter of the first lens is 3.2-3.8 mm.

26. An optical lens according to claim 1, characterized in that one or more of the side surface of the protrusion, the first structure region and the outer side surface of the first lens is surface roughened.

27. An optical lens according to claim 1, characterized in that the outer side of the second barrel or the first lens comprises at least one cutting surface.

28. An optical lens according to claim 1, characterized in that the field angle of the optical lens is greater than 60 °.

29. An optical lens according to claim 1, wherein a ratio of a cross-sectional diameter of the protrusion to an aperture of the light entrance hole of the second barrel is 0.3 to 0.6.

30. The utility model provides a module of making a video recording which characterized in that includes:

an optical lens as claimed in any one of claims 1 to 29; and

and the optical lens is arranged on the photosensitive assembly.

31. An under-screen camera assembly, comprising:

a display screen having a light passing hole; and

the camera module of claim 30, wherein the protrusion of the camera module extends into the light aperture.

32. A method for manufacturing an optical lens, comprising:

1) preparing a first lens and a second lens part separated from each other; wherein the first lens has a first surface on the object side and a second surface on the image side, wherein a central region of the first surface is convex toward the object side to form a protrusion, a top surface of the protrusion forms an optical zone for imaging, the first surface further has a first structural zone surrounding the protrusion, and a side surface of the protrusion connects the optical zone and the first structural zone; the second lens component comprises a second lens barrel and at least one second lens mounted on the inner side of the second lens barrel;

2) pre-positioning the first lens and the second lens component so that the at least one second lens and the first lens together form an imageable optical system;

3) actively calibrating the first lens and the second lens component; and

4) bonding the first optic with the second lens component such that the relative position of the first optic and the second lens component is maintained at the relative position determined by the active calibration.

33. A method according to claim 32, wherein in step 1), the first lens is manufactured by a glass molding process, and the protrusion is processed by a cutting or grinding process so that an included angle between a side surface of the protrusion and an optical axis of the optical lens is less than 15 °.

34. A method for manufacturing a camera module is characterized by comprising the following steps:

a) an optical lens manufactured by the method according to claim 32 or 33; and

b) and assembling the optical lens and the photosensitive component together to obtain the camera module.

35. The method for manufacturing a camera module according to claim 34, wherein in the step b), the optical lens and the photosensitive assembly are bonded together by a second adhesive material based on an active alignment process.

36. The camera module manufacturing method according to claim 34, wherein in the step b), active calibration is performed between the second lens member and the photosensitive component, and wherein the active calibration between the first lens member and the second lens member in the step 3) is performed simultaneously with the active calibration between the second lens member and the photosensitive component in the step b).