CN112444935B - Under-screen camera shooting assembly, camera shooting module, optical lens and manufacturing method of under-screen camera shooting assembly - Google Patents

Abstract

The present application relates to an optical lens, which includes: a first lens, a second lens component and a light shielding member. The first surface of the first lens has a protrusion protruding toward the object side, and a first structural area is arranged around the protrusion. The second lens component includes a second lens barrel and at least one second lens, the top of the second lens barrel has an extension and a light inlet of the second lens component, and the topmost second lens has a third surface located on the object side, which includes an optical zone located in the center, an inner structural zone surrounding the optical zone, and an outer structural zone, the outer structural zone rests on the extension, and the inner structural zone is exposed outside the extension. The first lens is bonded to the second lens component, the annular light shielding portion of the light shielding member is arranged above the first structural zone, and the outer diameter of the first lens is not greater than the aperture of the light inlet. The present application also provides a corresponding camera module and an under-screen camera assembly and a corresponding manufacturing method. The present application can reduce the aperture of the screen opening without sacrificing imaging quality.

Description

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

Technical Field

The present invention relates to the field of camera module technology, and more specifically, to an under-screen camera assembly and a corresponding camera module, an optical lens, and a manufacturing method thereof.

Background Art

With the popularization of mobile electronic devices, the relevant technologies of camera modules used in mobile electronic devices to help users obtain images (such as videos or images) have been rapidly developed and improved, and in recent years, camera modules have been widely used in many fields such as medical treatment, security, industrial production, etc.

In the field of consumer electronics, such as the field of smart phones, the front camera module is an indispensable component. The front camera module is usually set on the same side of the display screen to meet the user's selfie and other functions. However, as the screen-to-body ratio increases, higher and higher requirements are placed on the layout of the front camera. In order to reduce the impact of the camera on the screen-to-body ratio and achieve a full screen, different manufacturers have developed a variety of solutions from different angles. One technical direction is to arrange the front camera module on the top frame of the mobile phone to form a bangs screen or a water drop screen that is close to a full screen. Another technical direction is to use a retractable camera module to hide and use the camera. When shooting is required, the camera can be controlled to extend out of the shell of the mobile phone (or other electronic device) to shoot; after shooting, the camera retracts into the shell of the mobile phone (or other electronic device). However, the camera is easily damaged by external force during the continuous extension process and when the camera is extended relative to the mobile phone (or other electronic device), and it is difficult to replace.

At present, the "hole screen" solution is still commonly used in the market. The "hole screen" solution is usually combined with the under-screen camera module to achieve the highest possible screen-to-body ratio of the mobile phone. The "hole screen" is to cancel the structure in the screen that affects the lens receiving light, form a hole that can pass visible light, and set a camera module at the position corresponding to the hole, so as to achieve the front-end shooting of the mobile phone while increasing the screen-to-body ratio as much as possible. However, the head size of the current camera module is more than 3mm. Putting the head of the camera module into the hole will make the size of the screen opening large enough, and placing the camera module behind the screen. Considering the field of view of the camera module, the side wall of the screen opening cannot affect the light collection of the camera module. Therefore, the same opening should be relatively large, at least 4.5mm or more. This larger opening will lead to poor display effect of the screen and affect the user experience of the screen. Therefore, people expect the opening of the "hole screen" to be as small as possible.

On the other hand, high pixel, large aperture, small size and other elements have become an irreversible development trend of camera modules, and consumers' requirements for the image quality of camera modules are also increasing. Therefore, how to make the front camera module meet the requirements of high pixel, large aperture, small size and other requirements without sacrificing its image quality while minimizing the hole of the "perforated screen" as much as possible is also a difficult problem that needs to be solved in the current market.

Summary of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a solution for an under-screen camera assembly and a corresponding optical lens and camera module.

In order to solve the above technical problems, the present invention provides an optical lens, which includes: a first lens, the first lens has a first surface located on the object side and a second surface located on the image side, wherein the central area of the first surface bulges toward the object side to form a protrusion, the top surface of the protrusion forms an optical zone for imaging, the first surface also has a first structural zone surrounding the protrusion, and the side surface of the protrusion connects the optical zone and the first structural zone; a second lens component, which includes a second lens barrel and at least one second lens installed on the inner side of the second lens barrel, wherein the at least one second lens and the first lens together constitute an optical system that can form an image, and the top of the second lens barrel has an extension formed by extending inwards An extension portion, wherein a light inlet of the second lens component is formed in the center of the extension portion, and the second lens located at the top of 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 zone located in the center, an inner structural zone surrounding the optical zone, and an outer structural zone surrounding the inner structural zone, the outer structural zone rests on the bottom surface of the extension portion, and the inner structural zone is exposed outside the extension portion; and a light-shielding component, which includes an annular light-shielding portion; wherein the first lens is bonded to the second lens component, the annular light-shielding portion is arranged above the first structural zone, and the outer diameter of the first lens is not greater than the aperture of the light inlet of the second lens component.

Among them, 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 cloth glue area, and the second surface of the first lens is bonded to the cloth glue area of the topmost second lens.

Wherein, the position of the first structural area is higher than the top surface of the second lens barrel.

The first lens and the second lens component are bonded by a first adhesive material, and the first adhesive material supports the first lens and the second lens component after curing, so that the relative position of the first lens and the second lens component 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 and the second lens component according to the actual imaging result of the optical system; the central axis of the first lens and the central axis of the second lens component have a non-zero angle.

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

Wherein, in the third surface, the position of the inner structure area is higher than that of the outer structure area, and the outer structure area is connected to the inner structure area through a connecting area.

Wherein, a light shielding layer is attached to the transition area.

Wherein, a light shielding layer is attached to the side surface of the protruding portion, the first structural area and the outer side surface of the first lens.

The first lens is a single lens or a composite lens formed by a plurality of sub-lenses interlocked with each other, and the second lens has a plurality of sub-lenses and the plurality of second lenses are assembled together through the second lens barrel.

Wherein, the shading component is an annular SOMA sheet, and the SOMA sheet is bonded to the first structural area.

The light shielding component is a first lens barrel, the bottom surface of the first lens barrel is bonded to the top surface of the second lens barrel, and the top of the first lens barrel extends toward the first lens to form the annular light shielding portion.

Wherein, no adhesive material is disposed between the annular light shielding portion and the first structural area.

Among them, the shading component includes an annular support and a SOMA sheet, the annular support surrounds the first lens, the bottom surface of the annular support is bonded to the top surface of the second lens barrel, the top surface of the annular support is bonded to the SOMA sheet, the SOMA sheet is annular, and the SOMA sheet constitutes the annular shading portion.

Wherein, no adhesive material is disposed between the SOMA sheet and the first structural region.

Wherein, a light-shielding layer is attached to the side surface of the protruding portion and/or the outer side surface of the first lens.

The second surface has an optical zone for imaging and a second structural zone surrounding the optical zone, and a light-shielding layer is attached to the second structural zone.

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

Wherein, the minimum distance between the first lens and the second lens located at the top is 30-100 μm.

Wherein, at least two adjacent second lenses each have an optical zone, an inner structure zone surrounding the optical zone and an outer structure zone surrounding the inner structure zone, and the position of the inner structure zone is higher than the outer structure zone, and the outer structure zone is connected to the outer structure zone through an inclined connection zone; wherein the at least two adjacent second lenses form a mosaic, a SOMA sheet is arranged between the at least two adjacent second lenses, and the SOMA sheet is located between the two inner structure zones or between the two outer structure zones.

Wherein, the first lens is a molded glass lens.

The top surface of the protrusion has a transition zone, the transition zone is located at the edge of the top surface, and a light shielding layer is attached to the transition zone.

The diameter of the cross section of the protrusion is 1.0-2.0 mm; the height of the protrusion is 0.3-1.5 mm; the total height of the first lens is 0.4-1.9 mm; and the outer diameter of the first lens is 3.0-4.0 mm.

The diameter of the cross section of the protrusion is 1.2-1.6 mm; the height of the protrusion is 0.4-1.1 mm; the total height of the first lens is 0.6-1.5 mm; and the outer diameter of the first lens is 3.2-3.8 mm.

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

Wherein, the refractive index of the material used to make the first lens is 1.48-1.55.

Wherein, the Abbe number of the first lens is 50.0-70.1.

Wherein, one or more of the side surface of the protrusion, the first structural area and the outer side surface of the first lens are subjected to surface roughening treatment.

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

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

Wherein, the ratio of the cross-sectional diameter of the protrusion to the aperture of the light inlet of the second lens barrel is 0.3-0.6.

According to another aspect of the present application, a camera module is also provided, which includes: any one of the aforementioned optical lenses; and a photosensitive component, wherein the optical lens is installed on the photosensitive component.

According to another aspect of the present application, there is also provided an under-screen camera assembly, which includes: a display screen having a light-through hole; and any of the aforementioned camera modules, wherein the protrusion of the camera module extends into the light-through hole.

According to another aspect of the present application, a method for manufacturing an optical lens assembly is provided, which includes: 1) preparing a first lens, a second lens component and a light shielding member that are separated from each other; wherein the first lens has a first surface located on the object side and a second surface located on the image side, wherein the central area of the first surface protrudes toward the object side to form a protrusion, the top surface of the protrusion forms an optical zone for imaging, and the first surface also has a first structural zone surrounding the protrusion, and the side surface of the protrusion connects the optical zone and the first structural zone; the second lens component includes a second lens barrel and at least one second lens installed on the inner side of the second lens barrel; the light shielding member includes an annular light shielding portion; 2) pre-positioning the first lens and the second lens component so that the at least one second lens and the first lens together constitute an imageable optical system; 3) actively calibrating the first lens and the second lens component; 4) bonding the first lens to the second lens component so that the relative position of the first lens and the second lens component is maintained at the relative position determined by the active calibration; and 5) bonding the light shielding member to the combination of the first lens and the second lens component, and setting the annular light shielding portion above the first structural zone.

Wherein, in the 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 the angle between the side surface of the protrusion and the optical axis of the optical lens is less than 15°.

Wherein, in the step 1), the shading component is a first lens barrel, wherein the top of the first lens barrel extends toward the first lens to form the annular shading portion; in the step 5), the first lens barrel is bonded to the second lens barrel by a third adhesive material, wherein the third adhesive material is arranged on the top surface of the second lens barrel, and the third adhesive material surrounds the outer side of the first lens.

Wherein, in the step 1), the light shielding member is an annular SOMA sheet; in the step 5), the bottom surface of the SOMA sheet is bonded to the first structural area.

Wherein, in the step 1), the shading component includes an annular support and a SOMA sheet, wherein the SOMA sheet is annular and constitutes the annular shading portion; in the step 5), the bottom surface of the annular support is bonded to the top surface of the second lens barrel so that the annular support surrounds the first lens, and then the SOMA sheet is bonded to the top surface of the annular support.

According to another aspect of the present application, a camera module manufacturing method is also provided, which includes: a) manufacturing an optical lens according to any of the aforementioned optical lens manufacturing methods; and b) assembling the optical lens and a photosensitive component together to obtain a camera module.

Wherein, in the step b), based on an active calibration process, the optical lens and the photosensitive component are bonded together by a second adhesive material.

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

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

1. The optical lens and camera module of the present application help to reduce the aperture of the screen opening.

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

3. The optical lens and camera module of the present application can reduce the influence of stray light on the imaging of the camera module.

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

5. This application can reduce the size of the lens.

6. This application can reduce the space that the terminal device needs to reserve for the camera module.

7. In some embodiments of the present application, the ink layer can be sprayed from only one direction (i.e., from the side of the first lens), which reduces the process difficulty, is conducive to improving production efficiency and production yield, and is particularly suitable for large-scale mass production.

8. In some embodiments of the present application, the distance from the SOMA sheet to the first structural area of the first lens can be minimized to the greatest extent, so that the protrusion of the first lens can extend more fully into the light hole of the display screen, thereby being more helpful in reducing the aperture of the light hole of the display screen while maintaining the imaging quality.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a cross-sectional schematic diagram of an optical lens 1000 according to an embodiment of the present application;

FIG2 shows a cross-sectional schematic diagram of an optical lens 1000 according to another embodiment of the present application;

FIG3 shows a cross-sectional schematic diagram of an optical lens 1000 according to yet another embodiment of the present application;

FIG4 is a partial enlarged schematic diagram of a first lens and its surrounding structure in one embodiment of the present application;

FIG5 is a schematic cross-sectional view of a first lens in an embodiment of the present application;

FIG6 shows a cross-sectional schematic diagram of a camera module according to an embodiment of the present application;

FIG7 shows a three-dimensional schematic diagram of an optical lens in one embodiment of the present application;

FIG8a is a schematic top view of an example of an optical lens having a single cutting face in the second lens barrel, FIG8b is a schematic top view of an example of an optical lens having two cutting faces in the second lens barrel, and FIG8c is a schematic top view of an example of an optical lens having four cutting faces in the second lens barrel;

FIG9a is a schematic diagram showing an example of disposing a camera module with a cutting surface close to a mobile phone frame, and FIG9b is a schematic diagram showing another example of disposing a camera module with a cutting surface close to a mobile phone frame;

FIG10 is a cross-sectional schematic diagram of an under-screen camera assembly in one embodiment of the present application;

FIG11 is a cross-sectional schematic diagram of an under-screen camera assembly in another embodiment of the present application;

FIG. 12 shows an imaging beam path of an optical lens 1000 in one embodiment of the present application;

FIG. 13 is a cross-sectional schematic diagram of an optical lens 1000 in a modified embodiment of the present application.

DETAILED DESCRIPTION

In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

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

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

It should also be understood that the terms "comprises", "including", "having", "includes" and/or "comprising", when used in this specification, indicate the presence of the stated features, wholes, steps, operations, elements and/or parts, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, parts and/or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation, not degree, and are intended to account for the inherent variations in measurements or calculations that would be recognized by those of ordinary skill in the art.

Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

FIG1 shows a cross-sectional schematic diagram of an optical lens 1000 according to an embodiment of the present application. Referring to FIG1 , in this embodiment, the optical lens 1000 includes a first lens 110, a second lens component 200, and a SOMA sheet 121. The first lens 110 can be understood as a first lens component. In this embodiment, the first lens component is composed of a single first lens 110. The first lens 110 is generally a lens. The first lens 110 has a first surface 112 located on the object side and a second surface 117 located on the image side, wherein the central area of the first surface 112 protrudes toward the object side to form a protrusion 111, and the top surface 113 of the protrusion 111 forms an optical zone 113a for imaging, and the first surface 112 also has a first structural zone 115 surrounding the protrusion 111, and the side 114 of the protrusion 111 connects the optical zone 113a and the first structural zone 115. In this article, the structural zone is a non-optical zone, which can also be called an optically invalid zone. In this embodiment, the second lens component 200 includes a second lens barrel 220 and a plurality of second lenses 210 installed inside the second lens barrel 220, wherein the plurality of second lenses 210 and the first lens 110 together constitute an optical system capable of imaging. The top of the second lens barrel 220 has an extension portion 221 formed by extending inward, and the center of the extension portion 221 forms a light inlet 222 of the second lens component 200, and the second lens located at the top of the at least one second lens 210 has a third surface 211 located on the object side and a fourth surface 212 located on the image side, and the third surface 211 includes an optical zone 211a located in the center, an inner structure zone 211b surrounding the optical zone, and an outer structure zone 211c surrounding the inner structure zone 211b. The inner structure zone 211b can be used as a fabric glue zone. The outer structure zone 211c can be used as a bearing zone, which can bear on the bottom surface of the extension portion 221. The inner structure area 211b is exposed outside the extension part 221 to facilitate the arrangement of the adhesive. In this embodiment, the second surface 117 of the first lens 110 is bonded to the inner structure area 211b of the second lens 210 at the top. Specifically, the second structure area 118 of the second surface 117 of the first lens 110 is bonded to the adhesive area of the second lens at the top by the first adhesive 300. After the first adhesive 300 is cured, it supports the first lens 110 and the second lens component 200, so that the relative position of the first lens 110 and the second lens component 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 component 200 according to the actual imaging result of the optical system. During the active calibration process, the capture mechanism (such as a clamping mechanism) can move the first lens in multiple degrees of freedom by clamping the outer side surface of the first lens, thereby adjusting the relative position of the first lens and the second lens component, and then finding 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 placed at the rear end of the second lens. The photosensitive chip can be a photosensitive chip specially used for the active calibration process (in this case, the photosensitive chip can be set in the active calibration equipment), or it can be a photosensitive chip in the photosensitive component to be assembled (in this case, the photosensitive chip used for active calibration will eventually be assembled with the calibrated optical lens to form a camera module). Since the first lens has manufacturing tolerances during the manufacturing process, there are manufacturing tolerances and assembly tolerances between the lenses in the second lens component. After active calibration, the central axis of the first lens and the central axis of the second lens component can have a non-zero angle, thereby compensating for the above-mentioned manufacturing tolerances and assembly tolerances. The optical lens of this embodiment is particularly suitable for use in an under-screen camera module. In the optical lens of this embodiment, since the first lens 110 is exposed outside the second lens barrel 220, the protrusion 111 can extend into the small hole of the display screen (i.e., the light-through hole reserved by the display screen for the camera module under the screen), so that the light-entering 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. In this way, the optical lens can obtain a larger field of view, so that the aperture of the small hole of the display screen (the reserved light-through hole) can be reduced while ensuring the amount of light entering 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., through the second structural area of the second surface) with the upper surface of the second lens (i.e., the third surface). This design scheme can expose the first lens to the outside, thereby facilitating active calibration. The shape of the first lens is specially designed, especially with the protrusion 111, and the molding difficulty of this first lens may be higher than that of an ordinary lens (e.g., the second lens). Therefore, the manufacturing tolerance of the first lens may be higher than that of an ordinary lens, and in mass production, the consistency of the optical parameters and performance of the first lens may also be insufficient. If the above factors are not considered, the actual imaging quality of the optical lens produced in actual mass production may not be as expected, resulting in a series of problems such as a decrease in production yield. In this embodiment, the manufacturing tolerance or insufficient consistency of the first lens itself can be avoided or suppressed by an active calibration process, thereby ensuring the imaging quality of the actual mass-produced product and improving the production yield. In the scheme of the present application, the top surface of the second lens barrel can 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 lens barrel. Taking into account the manufacturing tolerance, when the diameter of the outer side surface of the first lens is less than 105% of the aperture of the top surface of the second lens barrel, it can be regarded that the diameter of the outer side surface of the first lens is smaller than the aperture of the top surface of the second lens barrel. It should be noted that since the aperture of the light-entry hole of the second lens barrel can change along the optical axis, the aperture of the top surface of the second lens barrel cannot be directly equivalent to the aperture of the light-entry hole of the second lens barrel. In fact, the aperture of the top surface of the second lens barrel is the aperture of the cross section of the light inlet of the second lens barrel closest to the object side. Further, in this embodiment, the SOMA sheet 121 is bonded to the first structural area 115, so that the SOMA sheet 121 can form a light shielding portion, thereby preventing or suppressing stray light from entering the optical system of the optical lens.

FIG. 2 shows a cross-sectional schematic diagram of an optical lens 1000 according to another embodiment of the present application. Different from the embodiment of FIG. 1 , in this embodiment, the SOMA sheet 121 is replaced by the first lens barrel 120. The bottom surface of the first lens barrel 120 is bonded to the top surface of the second lens barrel 220, and the top of the first lens barrel 120 extends toward the first lens 110 to form a light shielding portion. The light shielding portion is annular and surrounds the protrusion 111. Further, in one embodiment, no adhesive material may be provided between the annular light shielding portion and the first structural area 115. For example, the annular light shielding portion may directly contact the first structural area 115. In this embodiment, the first lens barrel 120 may play a role of light shielding and may also play a role of protecting the first lens. It should be noted that in the present application, the bonding method of the first lens barrel 120 is not limited to the above-mentioned embodiment. For example, in another embodiment, the bottom surface of the first lens barrel 120 may also be bonded to the top surface of the first lens 120, thereby fixing the first lens barrel to the optical lens 1000.

FIG3 shows a cross-sectional schematic diagram of an optical lens 1000 according to another embodiment of the present application. Different from the embodiment of FIG1 , in this embodiment, the SOMA sheet 121 is replaced by a composite light shielding member. The composite light shielding member includes an annular support member 122 and a SOMA sheet 121, wherein the annular support member 122 surrounds the first lens 110, the bottom surface of the annular support member 122 is bonded to the top surface of the second lens barrel 220, the top surface of the annular support member 122 is bonded to the SOMA sheet 121, the SOMA sheet 121 is annular, and the SOMA sheet 121 constitutes an annular light shielding portion that shields the first structural area 115. Further, in one embodiment, no adhesive is provided between the SOMA sheet 121 and the first structural area. In this way, the SOMA sheet 121 can be closer to the first structural area (if the SOMA sheet 121 is pasted on the first structural area 115, a certain thickness of adhesive material needs to be provided between the SOMA sheet 121 and the first structural area 115, resulting in the SOMA sheet 121 not being able to be as close to the first structural area 115 as possible), so that the protruding portion 111 of the first lens 110 can be more fully extended into the light hole of the display screen, thereby being more helpful in reducing the aperture of the light hole of the display screen while maintaining the imaging quality. In this embodiment, the annular support member 122 can play a role in shading and can also play a role in protecting the first lens.

Further, still referring to FIG. 1 (or referring to FIG. 2 and FIG. 3), in one embodiment of the present application, the bonding surfaces of the first lens and the second lens (which can be understood as the area of the bottom surface of the first lens in contact with the first adhesive material and the area of the top surface of the second lens in contact with the first adhesive material) are both set to be planes. In other words, the adhesive area (internal structure area) of the second lens and the second structure area of the first lens can both be planes and perpendicular to the optical axis (optical axis of the optical lens). The optical lens may encounter a high temperature and high humidity environment or a mechanical impact environment. Setting the bonding surface of the first lens and the second lens barrel to a plane can reduce the influence of the variation of the first adhesive material caused by the above environment on the relative position of the first lens and the second lens barrel in the horizontal direction, thereby solving or alleviating the problem of reduced imaging quality of the optical lens caused by the variation of the first adhesive material.

Further, FIG. 4 shows a partially enlarged schematic diagram of the first lens and its peripheral structure in an embodiment of the present application. Referring to FIG. 4 , in this embodiment, an ink layer is attached to the side 114 of the protruding portion 111 of the first lens 110 and/or the outer side 116 of the first lens 110. It should be noted that an independent shading component is not shown in FIG. 4 . An independent shading component refers to a SOMA sheet 121 as shown in FIG. 1 , or a first lens barrel 120 as shown in FIG. 2 , or a composite shading component as shown in FIG. 3 . The ink layer can be used in conjunction with the shading component to enhance the effect of reducing stray light. In other embodiments of the present application, the ink layer can also be replaced by a shading layer formed of other materials and attached to the above-mentioned area of the first lens, for example, an opaque material can be attached in the form of a coating to form a shading layer. Furthermore, in the present embodiment, the ink layer and the independent shading component are used in combination, so that the ink layer only needs to be attached to the side 114 of the protrusion 111 of the first lens 110, or the outer side 116 of the first lens 110, or the side 114 of the protrusion 111 of the first lens 110 and the outer side 116 of the first lens 110. Regardless of the arrangement of the above ink layers, the ink layer only needs to be sprayed from one direction (i.e., from the side of the first lens), thereby reducing the process difficulty, facilitating improving production efficiency and production yield, and being particularly suitable for large-scale mass production.

Further, still referring to FIG. 1 , in one 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 in contact with the first adhesive material and the area of the third surface of the second lens in contact with the first adhesive material) are both set to planes. The optical lens may encounter a high temperature and high humidity environment or a mechanical impact environment. Setting the bonding surface of the first lens 110 and the second lens 210 to a plane can reduce the influence of the variation of the first adhesive material 300 caused by the above environment on the relative position of the first lens 110 and the second lens component 200 in the horizontal direction, thereby solving or alleviating the problem of reduced imaging quality of the optical lens caused by the variation of the first adhesive material 300. In this embodiment, the bonding surface of the second lens can be understood as the adhesive cloth area of the third surface, that is, the inner structure area 211b.

Further, still referring to FIG. 1, in one embodiment of the present application, the position of the first structural area 115 of the first surface 112 can be higher than the top surface of the second lens barrel 220. This design can facilitate the fixture (or called the clamp) to clamp the outer side surface of the first lens (i.e., the peripheral side of the optical invalid area) to complete the active calibration. Further, in a preferred embodiment, the height difference between the first structural area 115 and the top surface of the second lens barrel 220 is greater than half of the height of the outer side surface of the first lens 110. Here, the outer side surface height refers to the size of the outer side surface 116 in the optical axis direction of the optical lens. Under this design, during the active calibration process, at least half of the outer side surface (at least the upper half) can be conveniently clamped to complete the active calibration. Further, in the embodiment of FIG. 1, the bottom surface of the first lens 110 (i.e., the second structural area 118) is lower than the top surface of the second lens barrel 220, that is, a part of the first lens 110 can extend into the light inlet 222 formed by the extension 221 of the second lens barrel 220. However, it should be noted that in other embodiments of the present application, the second structure area 118 may also be higher than the top surface of the second lens barrel 220 .

Further, in combination with reference to FIG. 1 and FIG. 4, in this embodiment, the side 114 of the protrusion 111 of the first lens 110, the first structural area 115 of the first surface 112, and the outer side 116 of the first lens 110 are all attached with an ink layer. The second surface 117 has an optical area for imaging and a second structural area 118 surrounding the optical area. Further, in one embodiment, the second structural area 118 of the second surface 117 can also be attached with an ink layer. Attaching an ink layer to the above-mentioned area of the first lens 110 can reduce stray light. In addition, the ink layer can also act as a diaphragm to control the amount of light entering the camera module. That is, the diaphragm of the optical lens is set on the first surface of the first lens. In other embodiments of the present application, the ink layer can also 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 can be attached in a coating manner to form the light-shielding layer.

Further, still referring to FIG. 1 , in one embodiment of the present application, in the optical lens, the second lens 210 has a plurality of lenses and the plurality of the second lenses 210 are assembled together through the second lens barrel 220. Specifically, the inner side surface of the second lens barrel 220 may form a plurality of steps, and when assembling the second lens 210, the second lens 210 may be sequentially embedded in the plurality of steps from small to large. After 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 position of the adhesive cloth area (i.e., the inner structure area 211b) can be higher than the bearing area (i.e., the outer structure area 211c), and the bearing area can be connected to the adhesive painting area through the connection area. In this embodiment, the inner structure area and the outer structure area are both planes and are perpendicular to the optical axis of the second lens. The connection area can be inclined. The connection area of the top second lens can be attached with a light shielding layer to prevent or inhibit stray light from entering the optical system for imaging from the gap between the second lens barrel 220 and the second lens 210 (i.e., prevent or inhibit stray light from entering the imaging beam channel). In this embodiment, the adhesive cloth area of the top second lens is higher than the bearing 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 its thickness in the outer structure area c). This design can not only increase the reliability of the second lens, making it less likely to deform during the assembly of the second lens component and the use of the camera module, but also reduce the difficulty of the second lens molding process. In particular, in the injection molding process, if the connecting portion between the optically ineffective area (i.e., the structural area) and the optical area is too thin, the molding accuracy of the optically ineffective area and the optical area will be reduced, thereby causing the imaging quality of the optical lens to decrease. In this embodiment, the design of the second lens having a higher adhesive area than the supporting area can better overcome this problem.

In the above embodiments, the first lens is a single independent lens, but the present application is not limited thereto. For example, in another embodiment of the present application, the first lens may be a composite lens formed by a plurality of sub-lenses interlocking with each other. During the active calibration stage, the composite lens may move as a whole and adjust the relative position relationship with the second lens component.

Further, still referring to FIG. 1 , in one embodiment of the present application, in the optical lens 1000, multiple second lenses 210 can be interlocked with each other under the premise of being assembled by the second lens barrel 220, so as to further improve the stability of the lens group. Furthermore, spacers can be arranged between the multiple second lenses 210 to improve the stability of the optical lens structure.

Further, still referring to FIG. 1, in one embodiment of the present application, in the second lens component 200 of the optical lens 1000, there may be a plurality of second lenses 210 having an inner structure area 211b and an outer structure area 211c, and for a single second lens 210, its inner structure area 211b is higher than its outer structure area 211c. These second lenses with two structural areas of different heights can be interlocked with each other, and a gasket (such as a SOMA sheet) is arranged between the inner structure areas 211b of adjacent second lenses. The gasket can have a shading effect, thereby constructing the required imaging beam channel. Referring to FIG. 1, under this design of the present embodiment, the position of the inner structure area of the plurality of second lenses 210 can be closer to the optical axis than the position of the extension. Further, FIG. 12 shows the imaging beam channel of the optical lens 1000 in one embodiment of the present application. Referring to FIG. 12, it can be seen that in the present embodiment, from the object side to the image side, the diameter of the imaging beam channel can be first reduced and then expanded. It should be noted that in the embodiments shown in FIG. 1 and FIG. 12 , the inner structure area 211b and the outer structure area 211c may be located not only on the object side surface of the second lens 210, but also on the image side surface of the second lens 210. For some or certain second lenses 210 (for example, the second lens located at the bottom end), it may have only a single structure area, that is, the structure area is a continuous plane without height difference. For some or certain second lenses 210 (for example, the second second lens located from the bottom end), only the object side surface may have the inner structure area 211b and the outer structure area 211c, and the image side surface may have only a single structure area, that is, the structure area of the image side surface is a continuous plane without height difference.

Further, in one embodiment of the present application, since the height of the protrusion of the first lens is relatively high, it has a greater impact on the transmittance of the optical lens. Therefore, in order to ensure that the photosensitive chip of the camera module can obtain more imaging light, the first lens can be made of glass material. And further, since the light incident surface of the first lens is usually aspherical, the first lens can be a molded glass lens. The molding principle of the molded glass lens includes: placing the glass embryo with a preliminary shape in a precision-machined molding mold, raising the temperature to soften the glass, and then applying pressure on the surface of the mold core to deform the glass and remove it from the mold, so as to form the lens shape we need. Molded glass is manufactured by a molding mold. The side wall of the protrusion of the first lens after molding may not be strictly parallel to the optical axis. For example, there may be a large angle between the side wall of the protrusion and the optical axis (i.e., the inclination angle of the side wall of the protrusion). At this time, the first lens can be ground by cold processing technology so that the angle between the side wall of the protrusion of the first lens and the optical axis is less than 15°. In this way, it is possible to avoid the maximum diameter of the protrusion (i.e., the diameter of the root of the protrusion) being too large due to the excessive inclination angle of the side wall of the protrusion. If the diameter of the root of the protrusion is too large, the aperture of the display screen will have to be enlarged.

Further, still referring to FIG. 4 , in one embodiment of the present application, the top surface 113 of the protrusion 111 has an optical zone 113a and a transition zone 113b, the transition zone 113b is located at the edge of the top surface 113, and the ink layer can be attached to the transition zone 113b. In this embodiment, the shape of the first lens 110 is special (for example, it has a protrusion 111), and the molding accuracy 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, there is a transition zone 113b between the top 113 of the protrusion 111 of the first lens 110 and the side wall 114, and the transition zone 113b can be provided with (i.e. attached with) a light-shielding material so that light cannot pass through the area to reduce the influence of the area on optical imaging. Preferably, the transition zone has a width of about 0.03-0.05mm from the side wall of the protrusion to the center position (the width refers to the radial dimension, i.e. the dimension in the direction perpendicular to the optical axis of the optical lens). In other embodiments, the width of the transition zone may also be other values, which specifically depends on the molding accuracy of the molded glass. Further, in other embodiments of the present application, the first lens may also be molded from other materials other than glass. During the molding of other materials, the edge of the top surface of the protrusion may also have a lower molding accuracy, so the edge of the top surface of the protrusion may also have the transition zone.

Further, FIG5 shows a schematic cross-sectional view of a first lens in an embodiment of the present application. Referring to FIG5 , in an 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 may be applicable to a first lens made of glass, but it should be noted that these parameter ranges are not limited to glass, and they may also be applicable to first lenses of other materials.

Further, still referring to FIG. 5 , the first lens is directly bonded to the adhesive area of the second lens. Compared with the first lens bonded to the extension of the second lens barrel, the structural area of the first lens can be further extended downward, so the height of the protrusion of the first lens can 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 protrusion of the first lens of this embodiment can be relatively higher). To support the lens, the minimum thickness of the lens barrel extension is about 0.3 mm. In one embodiment of the present application, the total height H2 of the first lens can be 0.3-1.5 mm. Preferably, the total height H2 of the first lens can be 0.4-1.1 mm. The height of the protrusion is the height from the first structural area of the first surface to the arc top of the protrusion, and the height is the dimension along the optical axis direction of the optical lens. The above parameter ranges can be applied to first lenses made of glass, but it should be noted that these parameter ranges are not limited to glass materials, and they can also be applied to first lenses of other materials.

Further, still referring to FIG. 5 , in one embodiment of the present application, the total height H2 of the first lens may be 0.4-1.9 mm. Preferably, the total height H2 of the first lens may be 0.6-1.5 mm. The total height of the first lens is the height from the second structural area of the second surface to the arc top of the protrusion, and the height is the dimension along the optical axis direction of the optical lens. The above parameter ranges can be applied to the first lens of glass material, but it should be noted that these parameter ranges are not limited to glass material, and they can also be applied to first lenses of other materials. Referring to FIG. 5 , in this embodiment, the thickness of the structural area of the first lens is equal to the total height H2 of the first lens minus the height H1 of the protrusion. Generally speaking, the smaller the thickness of the structural area of the first lens, the more conducive it is for the protrusion 111 to extend more fully into the light hole of the display screen. However, if the thickness of the structural area is too small, the first lens will be easily bent during the clamping and moving process, which may cause the active calibration to fail to achieve the expected effect, thereby causing the image quality to deteriorate. Specifically, if the thickness of the structural area is too small, the first lens may bend when the fixture clamps it. Although this bend may be very small, 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 will cause the imaging results obtained by the photosensitive chip to vary, resulting in the active calibration failing to achieve the expected effect.

Further, still referring to Figure 5, 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 may be 3.2-3.8 mm. If the outer diameter L2 is too small, the area available for arranging the first adhesive material may become smaller, affecting the stability and reliability of the bonding. If the outer diameter L2 is too large, the first lens is prone to bending during the clamping and moving process, which may cause the active calibration to fail to achieve the expected effect, thereby causing the imaging quality to deteriorate. Specifically, if the outer diameter L2 of the first lens is too large, the first lens may bend when the fixture clamps the first lens. Although this 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 will cause the imaging result obtained by the photosensitive chip to vary, resulting in the active calibration failing to achieve the expected effect.

The above parameter ranges may be applicable to a first lens made of glass, but it should be noted that these parameter ranges are not limited to glass, and they may also be applicable to a first lens made of other materials.

Further, in conjunction with reference to Figure 1, in one embodiment of the present application, the first lens has a protrusion with a cross-sectional diameter L1 of 1.0-2.0 mm, and the height H1 of the protrusion can be 0.3-1.5 mm. Under this design, the thickness of the first lens at the optical zone is relatively large, and the difficulty of optical design is increased. Generally speaking, the ratio of the imaging surface diameter of the first surface of the first lens to the imaging surface diameter of the third surface of the second lens is approximately 0.80-1.25. Further, since the first lens is bonded to the adhesive area of the second lens, in order to meet the bonding force requirements between the first lens and the second lens, a larger bonding area is provided, so the width of the adhesive area can be greater than 0.3 mm (the width refers to the radial dimension, that is, the dimension perpendicular to the optical axis). Preferably, the width of the adhesive area is between 0.5-0.8 mm, so as to meet the glue layout and avoid the radial dimension of the second lens component being too large as much as possible. In view of the above parameter restrictions, and further considering the necessary dimensions of the connection area between the second lens optical zone 211a and the inner structure 211b (cloth adhesive zone), and the connection area between the inner structure zone 211b (cloth adhesive zone) and the outer structure zone 211c (support zone), in this embodiment, the aperture of the second lens barrel extension is greater than 2.5 mm. Preferably, the aperture of the second lens barrel extension is between 3.0 mm and 4.4 mm. The ratio of the cross-sectional diameter of the first lens protrusion to the aperture of the second lens barrel extension (i.e., the aperture of the light inlet of the second lens barrel) is approximately 0.3-0.6. Preferably, the ratio of the cross-sectional diameter of the first lens protrusion to the aperture of the second lens barrel extension can be 0.35-0.5.

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

Further, in one embodiment of the present application, the refractive index of the material used to make the first lens is 1.48-1.55. The Abbe number of the first lens may be 50.0-70.1. The first lens is usually aspherical. When the first lens is made of glass material, the first lens is usually made by a process method of molded glass. Since molded glass requires the use of a mold to press the glass for processing, molded glass generally causes greater damage to the mold when manufacturing a biconcave lens. 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 relatively thick thickness relative to the lateral dimension. Correspondingly, the refractive index of the lens molding material is preferably 1.48-1.55, and the Abbe number of the first lens is preferably 50.0-70.1, so that the imaging quality of the split lens can be better controlled.

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

Furthermore, 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 better light-shielding effect and at the same time make the thickness of the ink layer have a smaller effect on the height H1 of the protrusion 111, the thickness of the ink layer of the first lens can be 15-30 μm.

Furthermore, in one embodiment of the present application, in the first lens, the side of the protrusion, the first structural area of the first surface, the outer side of the first lens, and the second structural area of the second surface are subjected to surface roughening treatment. The inner structural area, the outer structural area and the connection area (the connection area between the inner structural area and the outer structural area) of the top second lens can also be subjected to surface roughening treatment. The surface roughening treatment can be achieved, for example, by grinding. Roughening the above-mentioned areas of the first lens can not only reduce the influence of stray light on the imaging of the lens, but also improve the bonding strength between the ink layer and the lens, so that the ink is not easy to fall off during the use of the lens, and reduce the influence of dirt on the imaging of the lens. In this embodiment, the roughening treatment can also make the surface of the first lens easier to bond other components. In a deformed embodiment, the area subjected to surface roughening treatment can also be one, two or three of the side of the protrusion, the first structural area of the first surface, the outer side of the first lens, and the second structural area of the second surface.

Further, FIG. 13 shows a cross-sectional schematic diagram of an optical lens 1000 in a modified embodiment of the present application. Referring to FIG. 13 , in this embodiment, the bonding position of the first lens and the second lens component is different from that of the embodiment of FIG. 1 . In this embodiment, the bonding of the first lens and the second lens component is achieved by bonding the first lens to the side of the extension portion of the second lens barrel. The side of the extension portion can be understood as the hole wall of the light inlet hole of the second lens component (second lens barrel). The aperture of the light inlet hole can be gradually reduced from the object side to the image side so as to arrange the first adhesive material and achieve the bonding of the outer side of the first lens and the hole wall of the light inlet hole. Except for the bonding position, the remaining structures and connection relationships of this embodiment can refer to the embodiment of FIG. 1 and will not be repeated. The embodiments shown in FIG. 2 and FIG. 3 can also be similarly deformed, that is, the bonding of the first lens and the second lens component is achieved by bonding the first lens to the side of the extension portion of the second lens barrel.

It should be noted that in the above embodiment, the minimum gap between the first lens and the second lens at the top is greater than or not less than 10 μm, and preferably, the minimum gap can be 30-100 μm. The size of the minimum gap ensures that the active calibration has sufficient adjustment gap, that is, it ensures that the first lens does not interfere with the second lens during active calibration (that is, the two will not collide with each other during active calibration). The minimum gap can be the gap where the first adhesive is arranged, or it can be the gap at other positions.

Further, FIG6 shows a cross-sectional schematic diagram of a camera module of an embodiment of the present application. Referring to FIG6, according to an embodiment of the present application, a camera module is provided, which includes an optical lens 1000 and a photosensitive component 2000. The optical lens 1000 is mounted on the photosensitive component 2000. Specifically, the optical lens 1000 can be bonded to the photosensitive component 2000 by a second adhesive 400. The optical lens can be an optical lens as shown in FIG1, and its specific structure is not repeated here (note that FIG6 shows an adhesive for bonding the SOMA sheet 121 and the first lens 110). The photosensitive component 2000 may include a photosensitive chip 2001, a circuit board 2002, a color filter 2003, a lens holder 2004 and an electronic component 2005. The photosensitive chip 2001 is attached to the upper surface of the circuit board 2002. The lens holder 2004 is mounted on the upper surface of the circuit board 2002 and surrounds the photosensitive chip 2001. The top surface of the lens holder can be used as the mounting surface of the optical lens 1000. The color filter 2003 is mounted on the lens holder 2004. The upper surface of the circuit board can also be mounted with electronic components 2005. The photosensitive chip 2001 and the circuit board 2002 can be electrically connected by wire bonding (wire bonding, also known as "wire bonding") process. The connecting wire can be a gold wire or other metal wire with good conductivity.

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

Further, in one embodiment of the present application, in the optical lens, the side of the second lens barrel may have a cutting surface. FIG. 7 shows a three-dimensional schematic diagram of an optical lens 1000 in one embodiment of the present application. Referring to FIG. 7, in one embodiment of the present application, the optical lens 1000 includes a first lens 110 and a second lens component. The second lens component includes a second lens barrel 220 and a plurality of second lenses (the second lenses are blocked in FIG. 7) installed in the second lens barrel 220. The first lens 110 is bonded to the top surface of the second lens barrel 220. In this embodiment, the outer side 223 of the second lens barrel 220 has a cutting surface 224. This cutting surface 224 can make the front camera module be arranged closer to the frame of the housing of the electronic device (such as a mobile phone). FIG. 8a, 8b, and 8c respectively show top views of three second lens barrel cutting methods. Specifically, FIG. 8a shows a schematic top view of an example of an optical lens having a single cutting surface in the second lens barrel, FIG. 8b shows a schematic top view of an example of an optical lens having two cutting surfaces in the second lens barrel, and FIG. 8c shows a schematic top view of an example of an optical lens having four cutting surfaces in the second lens barrel. In FIG. 8a, 8b, and 8c, the shaded portion represents the cut area. Further, FIG. 9a shows a schematic diagram of an example of setting a camera module having a cutting surface close to the position of a mobile phone frame, and FIG. 9b shows a schematic diagram of another example of setting a camera module having a cutting surface close to the position of a mobile phone frame. It can be seen that cutting the side of the second lens barrel helps to set the camera module to a position closer to the mobile phone frame. As shown in FIG. 9a, the optical lens 1000 of the front camera module can have a cutting surface, which can be set at the top frame 10 close to the terminal device (e.g., a mobile phone). As shown in Fig. 9b, the optical lens 1000 of the front camera module can have four cutting surfaces, wherein the top and right cutting surfaces can be respectively arranged close to the top frame 10a and the right frame 10b of the terminal device (e.g., a mobile phone). In Figs. 9a and 9b, the x and y coordinate axes respectively represent the two coordinate axes of the rectangular coordinate system on the plane perpendicular to the optical axis of the camera module (i.e., the plane where the display screen surface is located).

Furthermore, 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 method may refer to Figures 8a, 8b, and 8c.

Further, FIG10 shows a cross-sectional schematic diagram of an under-screen camera assembly in an embodiment of the present application. Referring to FIG10 , according to an embodiment of the present application, a under-screen camera assembly is also provided, which includes: a display screen 3000 and a camera module (note that FIG10 only shows its optical lens, and does not show its photosensitive component). The display screen 3000 has a light hole 3002. Specifically, the display screen 3000 has a front and a back, wherein the front is the side that displays the image, and the back is the opposite side. In the under-screen camera assembly, the display screen 3000 has a light hole 3002 so that external light can enter the camera module located under the screen. The light hole 3002 can be a through hole or a blind hole. The front of the display screen 3000 can be covered with a transparent cover plate 3001, and the cover plate 3001 can be not pierced at the light hole 3002 (as shown in FIG10). When the cover plate 3001 is not pierced, that is, when the cover plate 3001 is complete, it can play a better dustproof and protective role. It should be noted that in other embodiments, the cover plate can also be pierced at the light-through hole 3002. Further, in this embodiment, the optical lens of the camera module can be an optical lens 1000 as shown in Figure 1, and 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-through hole 3002. The display screen 3000 can also include a substrate 3003, which is located on the back of the display screen 3000, so the substrate 3003 can also be called a back plate. In this embodiment, the light-shielding member of the camera module can be located below the substrate 3003. In one example, the top surface of the light-shielding member can be supported on the bottom surface of the substrate 3003. The top surface of the light-shielding member is supported on the bottom surface of the substrate, which can make the light-entering surface of the optical lens 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 of view, and it is helpful to reduce the aperture of the display screen light hole under the premise of ensuring the amount of light entering the optical lens, thereby improving the visual effect and user experience of the display screen. Further, in this embodiment, the gap between the protrusion 111 and the display screen cover 3001 (or referred to as the cover layer) can be 0.08-0.5mm. The gap between the protrusion 111 and the display screen cover 3001 can be understood as the gap between the arc top of the top surface of the protrusion 111 and the display screen cover 3001. In this embodiment, a light shielding layer can also be provided in the non-optical area of the first lens. For details, please refer to Figure 4 and the corresponding embodiments in the foregoing text, which will not be repeated here. In another example, a gap can be retained between the top surface of the light shielding member and the bottom surface of the substrate 3003. This design can avoid collision between the camera module (or optical lens) and the display screen. It should be noted that in other embodiments of the present application, the SOMA sheet as a light shielding member can also be replaced by a light shielding member in the embodiment shown in Figure 2 or Figure 3.

FIG11 shows a cross-sectional schematic diagram of an under-screen camera assembly in another embodiment of the present application. Referring to FIG11 , in another embodiment of the present application, the substrate 3001 (or back plate) of the display screen 3000 may have an opening 3004 and the diameter of the opening 3004 is greater than the diameter of the outer side surface of the first lens 110 (the meaning of the outer side surface can be referred to FIG1 and the description of the corresponding embodiment). The opening 3004 of the substrate 3003 may also be referred to as a mounting hole. The shading member (in this embodiment, the shading member is a SOMA sheet attached to the first structural area) and the first structural area of the first lens 110 may be located in the opening 3004. That is, at least a portion of the outer side surface of the shading member and the first lens 110 is placed in the opening 3004 (i.e., the mounting hole) of the substrate 3003. In this solution, the protrusion 111 can extend more fully into the light hole 3002 of the display screen 3000, 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 of view, and it is helpful to reduce the aperture of the display screen light hole under the premise of ensuring the amount of light entering the optical lens, thereby improving the visual effect and user experience of the display screen. In this embodiment, the gap between the protrusion and the display screen cover plate (or referred to as the cover plate layer) can be 0.08-0.5mm. The gap between the protrusion 111 and the display screen cover plate 3001 can be understood as the gap between the arc top of the top surface of the protrusion 111 and the display screen cover plate 3001. In this embodiment, a shading layer can also be provided in the non-optical area of the first lens. For specific contents, please refer to Figure 4 and the corresponding embodiments in the foregoing text, which will not be repeated here. It should be noted that in other embodiments of the present application, the SOMA sheet as a shading component can also be replaced by a shading component in the embodiment shown in Figure 2 or Figure 3.

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

Furthermore, according to an embodiment of the present application, a method for manufacturing an optical lens is also provided, which includes the following steps S1-S4.

Step S1, prepare the first lens, the second lens component and the light shielding member separated from each other. Still referring to FIG. 1, the first lens 110 has a first surface 112 located on the object side and a second surface 117 located on the image side, wherein the central area of the first surface 112 protrudes toward the object side to form a protrusion 111, the top surface 113 of the protrusion 111 forms an optical zone 113a for imaging, and the first surface 112 also has a first structural zone 115 surrounding the protrusion 111, and the 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 lens barrel 220 and a plurality of second lenses 210 installed inside the second lens barrel 220, wherein the plurality of second lenses 210 and the first lens 110 together constitute an imageable optical system. The light shielding member includes an annular light shielding portion.

Step S2, pre-positioning the first lens 110 and the second lens component 200. In this step, the first lens 110, the second lens component 200 and the photosensitive component (which can be a photosensitive component to be assembled, or a photosensitive component or a photosensitive chip equipped with an active calibration device) are arranged along the optical axis so that the optical system composed of the first lens 110 and the second lens component 200 can be imaged. At this time, the first lens 110 and the second lens component 200 can be regarded as a split lens. In this embodiment, the second lens component 200 can be placed on a carrier, which can have a light hole, and the photosensitive component can be placed under the light hole of the carrier. The first lens 110 can be clamped and moved by a six-axis movable fixture. The six axes will be explained in detail in step S3. The fixture can clamp the outer side of the first lens to capture and move the first lens 110. Since in this embodiment, the outer side surface of the first lens can partially extend into the light inlet hole of the second lens barrel, the clamp can only clamp the upper half of the outer side surface of the first lens, that is, only clamp the portion of the outer side surface of the first lens close to the object side. In another embodiment, the clamp can capture and move the first lens 110 by clamping the side surface of the protrusion.

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

Step S4: Finally, the first lens 110 and the second lens component 200 are bonded together by the first adhesive 300. After the first adhesive 300 is cured, the first lens 300 and the second lens component 200 can be maintained at a relative position determined by the active calibration.

Step S5, bonding the light shielding component to the combination of the first lens and the second lens component, and arranging the annular light shielding portion above the first structural area.

In the above embodiment, the placement of the first adhesive material can be performed before pre-positioning (i.e., step S2), or after active calibration (i.e., step S3) is completed. When the placement of the first adhesive material is performed after active calibration (i.e., step S3) is completed, first remove the first lens component, and then place the first adhesive material in the adhesive distribution area (internal structure area) of the second lens at the top of the second lens component (or place the first adhesive material on the side wall of the light inlet of the second lens component), and then perform step S4 to solidify the first adhesive material. In the present application, the first adhesive material is suitable for being solidified by at least one of visible light, ultraviolet rays, baking, etc.

Further, in one embodiment of the present application, in step S1, the light shielding member may be a first lens barrel, wherein the top of the first lens barrel extends toward the first lens to form the annular light shielding portion. In step S5, the first lens barrel may be bonded to the second lens barrel by a third adhesive, wherein the third adhesive is arranged on the top surface of the second lens barrel, and the third adhesive surrounds the outer side of the first lens.

Further, in another embodiment of the present application, in step S1, the light shielding member is an annular SOMA sheet. In step S5, the bottom surface of the SOMA sheet is bonded to the first structural area.

Further, in another embodiment of the present application, in step S1, the light shielding member includes an annular support and a SOMA sheet, wherein the SOMA sheet is annular and constitutes the annular light shielding portion. In step S5, the bottom surface of the annular support is bonded to the top surface of the second lens barrel so that the annular support surrounds the first lens, and then the SOMA sheet is bonded to the top surface of the annular support.

Furthermore, in one embodiment of the present application, in the step S1, the first lens is manufactured by a molded glass process, and the protrusion is processed by a removal process such as cutting or grinding, so that the angle between the side of the protrusion and the optical axis of the optical lens is less than 15°.

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

Step a: manufacturing an optical lens according to the optical lens manufacturing method (steps S1-S4) in the above-mentioned embodiment.

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

Wherein, in the step b, based on the active calibration process, the optical lens and the photosensitive component are bonded together by a second adhesive material. In one embodiment, the optical lens can be assembled first, and then the optical lens and the photosensitive component are assembled. The process of assembling the optical lens and the photosensitive component can be a traditional active calibration process (AA process, which refers to an active calibration process without adjusting the optical system itself, that is, the lens and the photosensitive component are bonded and fixed by adjusting the relative position between the optical lens and the photosensitive component), or it can be a traditional bracket attachment process (HA process, that is, directly attaching the lens 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 can be performed between the second lens component and the photosensitive component. Moreover, the active calibration between the first lens and the second lens component in the step S3 and the active calibration between the second lens component and the photosensitive component in the step b can be performed simultaneously. Then, the first lens and the second lens component are bonded (by a first adhesive) and the second lens component and the photosensitive component (by a second adhesive) are bonded respectively to form a complete camera module.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims (34)

1. An optical lens, comprising: A first lens, wherein the first lens has a first surface located on the object side and a second surface located on the image side, wherein a central area of the first surface bulges toward the object side to form a protrusion, a top surface of the protrusion forms an optical zone for imaging and an arc-shaped transition zone located at an edge thereof, the optical zone and the transition zone together constitute a continuous arc-shaped surface, the first surface further has a first structural zone surrounding the protrusion, and a side surface of the protrusion connects the transition zone and the first structural zone; A second lens component, comprising a second lens barrel and at least one second lens installed inside the second lens barrel, wherein the at least one second lens and the first lens together constitute an imageable optical system, the top of the second lens barrel has an extension portion extending inwardly, the center of the extension portion forms a light inlet of the second lens component, and the second lens located at the top of 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 comprises an optical zone located in the center, an inner structure zone surrounding the optical zone, and an outer structure zone surrounding the inner structure zone, the outer structure zone rests on the bottom surface of the extension portion, and the inner structure zone is exposed outside the extension portion; and a light shielding member including an annular light shielding portion; The first lens is bonded to the second lens component, the annular light shielding portion is arranged above the first structural area, and the outer diameter of the first lens is not greater than the aperture of the light inlet hole of the second lens component; the first lens is bonded to the second lens component by a first adhesive material, and the first adhesive material supports the first lens and the second lens component after curing, so that the relative position of the first lens and the second lens component 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 and the second lens component according to the actual imaging result of the optical system; the central axis of the first lens and the central axis of the second lens component have a non-zero angle; The first lens is a molded glass lens, the diameter of the cross section of the protrusion is 1.0-2.0 mm; the height of the protrusion is 0.3-1.5 mm; the ratio of the cross section diameter of the protrusion to the aperture of the light inlet of the second lens barrel is 0.3-0.6; In the protruding portion of the first lens, a light shielding layer is attached to the upper surface of the arc-shaped transition zone, and the arc-shaped transition zone is directly connected to the side surface of the protruding portion; and the transition zone has a width of 0.03-0.05 mm from the side wall of the protruding portion to the center position; The first lens is manufactured by the following method: placing a glass embryo in a molding mold, molding it based on a molding process and then removing it from the mold to obtain a semi-finished product in which the side of the protrusion has an angle with its optical axis, and then cutting or grinding the protrusion so that the angle between the side of the protrusion and its optical axis is less than 15°, thereby obtaining the first lens. 2. The optical lens according to claim 1 is characterized in that 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 cloth glue area, and the second surface of the first lens is bonded to the cloth glue area of the topmost second lens. 3 . The optical lens according to claim 1 , wherein the first structural area is located higher than the top surface of the second lens barrel. 4. The optical lens according to claim 1 is characterized in that the second surface has an optical zone for imaging and a second structural zone surrounding the optical zone, the second structural zone is located lower than the top surface of the second lens barrel, and the first adhesive is located between the outer side surface of the first lens and the extension portion. 5. The optical lens according to claim 3, characterized in that, in the third surface, the position of the inner structure area is higher than the outer structure area, and the outer structure area is connected to the inner structure area through a connecting area. The optical lens according to claim 5 , wherein a light shielding layer is attached to the connecting area. 7 . The optical lens according to claim 1 , wherein a light shielding layer is attached to the side surface of the protruding portion, the first structural area, and the outer side surface of the first lens. 8. The optical lens according to claim 1, characterized in that the first lens is a single lens or a composite lens formed by a plurality of sub-lenses interlocked with each other, and the second lens has a plurality of second lenses and the plurality of second lenses are assembled together through the second lens barrel. 9 . The optical lens according to claim 1 , wherein the light shielding component is an annular SOMA sheet, and the SOMA sheet is bonded to the first structural area. 10. The optical lens according to claim 1, wherein the light shielding member is a first lens barrel, a bottom surface of the first lens barrel is bonded to a top surface of the second lens barrel, and a top of the first lens barrel extends toward the first lens to form the annular light shielding portion. 11 . The optical lens according to claim 10 , wherein no adhesive material is disposed between the annular light shielding portion and the first structural area. 12. The optical lens according to claim 1 is characterized in that the shading component includes an annular support and a SOMA sheet, the annular support surrounds the first lens, the bottom surface of the annular support is bonded to the top surface of the second lens barrel, the top surface of the annular support is bonded to the SOMA sheet, the SOMA sheet is annular, and the SOMA sheet constitutes the annular shading portion. 13 . The optical lens according to claim 12 , wherein no adhesive material is disposed between the SOMA sheet and the first structural area. 14 . The optical lens according to claim 1 , wherein a light shielding layer is attached to the side surface of the protrusion and/or the outer side surface of the first lens. 15 . The optical lens according to claim 1 , wherein the second surface comprises an optical zone for imaging and a second structural zone surrounding the optical zone, and a light shielding layer is attached to the second structural zone. 16 . The optical lens according to claim 1 , wherein a minimum distance between the first lens and the second lens located at the top is not less than 10 μm. 17 . The optical lens according to claim 16 , wherein a minimum distance between the first lens and the second lens located at the top is 30-100 μm. 18. The optical lens according to claim 1, characterized in that at least two adjacent second lenses each have an optical zone, an inner structure zone surrounding the optical zone, and an outer structure zone surrounding the inner structure zone, and the inner structure zone is located higher than the outer structure zone, and the outer structure zone is connected to the outer structure zone via an inclined connection zone; wherein the at least two adjacent second lenses form a mosaic, a SOMA sheet is arranged between the at least two adjacent second lenses, and the SOMA sheet is located between the two inner structure zones or between the two outer structure zones. 19. The optical lens according to claim 1, characterized in that the total height of the first lens is 0.4-1.9 mm; and the outer diameter of the first lens is 3.0-4.0 mm. 20. The optical lens according to claim 1, characterized in that the diameter of the cross section of the protrusion is 1.2-1.6 mm; the height of the protrusion is 0.4-1.1 mm; the total height of the first lens is 0.6-1.5 mm; and the outer diameter of the first lens is 3.2-3.8 mm. 21. The optical lens according to claim 1, characterized in that the refractive index of the material making the first lens is 1.48-1.55. 22. The optical lens according to claim 1, wherein the Abbe number of the first lens is 50.0-70.1. 23 . The optical lens according to claim 1 , wherein one or more of the side surface of the protrusion, the first structural area, and the outer side surface of the first lens are subjected to surface roughening treatment. 24 . The optical lens according to claim 1 , wherein the outer side surface of the second lens barrel or the first lens comprises at least one cutting surface. 25. The optical lens according to claim 1, wherein the field of view of the optical lens is greater than 60°. 26. A camera module, comprising: The optical lens according to any one of claims 1 to 25; and Photosensitive component, the optical lens is installed on the photosensitive component. 27. An under-screen camera assembly, comprising: A display screen having a light-through hole; and The camera module described in claim 26, wherein the protrusion of the camera module extends into the light-through hole. 28. A method for manufacturing an optical lens, comprising: 1) Prepare a first lens, a second lens component and a light shielding member that are separated from each other; wherein the first lens has a first surface located on the object side and a second surface located on the image side, wherein the central area of the first surface bulges toward the object side to form a protrusion, the top surface of the protrusion forms an optical zone for imaging and an arc-shaped transition zone located at its edge, the optical zone and the transition zone together constitute a continuous arc-shaped surface, the first surface also has a first structural zone surrounding the protrusion, and the side surface of the protrusion connects the transition 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; the light shielding member comprises an annular light shielding portion; the first lens is a molded glass lens, and the diameter of the cross section of the protrusion is 1.0-2 .0mm; the height of the protrusion is 0.3-1.5mm; the ratio of the cross-sectional diameter of the protrusion to the aperture of the light inlet of the second lens barrel is 0.3-0.6; in the protrusion of the first lens, a light shielding layer is attached to the upper surface of the arc-shaped transition zone, and the arc-shaped transition zone is directly connected to the side of the protrusion; and the transition zone has a width of 0.03-0.05mm from the side wall of the protrusion to the center position; the first lens is manufactured according to the following method: placing a glass embryo in a molding mold, molding it based on a molding process and then removing it from the mold to obtain a semi-finished product with an angle between the side of the protrusion and its optical axis, and then cutting or grinding the process so that the angle between the side of the protrusion and its optical axis is less than 15°, thereby obtaining the first lens; 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; 4) bonding the first lens to the second lens component so that the relative position of the first lens and the second lens component is maintained at the relative position determined by active calibration; and 5) Bonding the light shielding component to the combination of the first lens and the second lens component, and arranging the annular light shielding portion above the first structural area. 29. The method for manufacturing an optical lens according to claim 28, characterized in that in the step 1), the light shielding member is a first lens barrel, wherein the top of the first lens barrel extends toward the first lens to form the annular light shielding portion; In the step 5), the first lens barrel is bonded to the second lens barrel by a third adhesive, wherein the third adhesive is arranged on the top surface of the second lens barrel, and the third adhesive surrounds the outer side of the first lens. 30. The method for manufacturing an optical lens according to claim 28, characterized in that in the step 1), the light shielding member is an annular SOMA sheet; In the step 5), the bottom surface of the SOMA sheet is bonded to the first structural area. 31. The method for manufacturing an optical lens according to claim 28, characterized in that in the step 1), the light shielding member comprises an annular support and a SOMA sheet, wherein the SOMA sheet is annular and constitutes the annular light shielding portion; In the step 5), the bottom surface of the annular support member is bonded to the top surface of the second lens barrel so that the annular support member surrounds the first lens, and then the SOMA sheet is bonded to the top surface of the annular support member. 32. A camera module manufacturing method, characterized by comprising: a) manufacturing an optical lens according to the optical lens manufacturing method according to any one of claims 28 to 31; and b) Assembling the optical lens and the photosensitive component together to obtain a camera module. 33. The camera module manufacturing method according to claim 32 is characterized in that in the step b), based on an active calibration process, the optical lens and the photosensitive component are bonded together by a second adhesive material. 34. The camera module manufacturing method according to claim 33 is characterized in that, in the step b), active calibration is performed between the second lens component and the photosensitive component, and the active calibration between the first lens and the second lens component in the step 3) is performed simultaneously with the active calibration between the second lens component and the photosensitive component in the step b).