CN112946853A

CN112946853A - Camera module and electronic equipment

Info

Publication number: CN112946853A
Application number: CN202010017734.6A
Authority: CN
Inventors: 冉坤; 周少攀; 罗振东
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-12-10
Filing date: 2020-01-08
Publication date: 2021-06-11
Also published as: WO2021115118A1

Abstract

The application provides a camera module and electronic equipment. The camera module comprises an optical lens group, an image sensor and a supporting component, wherein the supporting component fixes the optical lens group on one side of the image sensor; the optical lens group comprises a first lens and a second lens; the first lens is fixed on the first supporting piece, and the second lens is arranged between the first supporting piece and the image sensor; the second lens can filter infrared light, and the second lens has a lens surface, and the lens surface is used for participating in the formation of image of optical lens group. The application can realize better optical shooting performance by utilizing a simple and compact structure.

Description

Camera module and electronic equipment

Technical Field

The application relates to the field of optics, especially, relate to a camera module and electronic equipment.

Background

With the continuous progress of science and technology, the shooting capability of mobile terminals such as mobile phones is continuously improved, and the structure of a camera of the mobile phone is more and more complex.

At present, in order to make a camera have a better imaging quality, a lens assembly of the camera includes a plurality of lenses. The lenses are arranged in sequence along the optical axis direction, thereby realizing high-quality imaging and correcting aberration during large aperture. The more the number of the lenses is, the more the imaging quality can be improved, and the lens assembly has a larger maximum aperture. In one prior art lens assembly configuration, the lens assembly includes 7 lenses that cooperate to form the optical path of the lens assembly, thereby providing a maximum aperture of F1.4 at the lens assembly.

However, when the number of lenses in the lens assembly is large, the assembly difficulty is greatly increased, and the product yield is reduced, thereby restricting the increase of the maximum aperture of the lens assembly and the improvement of the optical imaging quality.

Disclosure of Invention

The application provides a camera module and electronic equipment, can utilize simple and compact structure and realize better optical shooting performance.

In a first aspect, the present application provides a camera module, including an optical lens group, an image sensor and a supporting assembly, where the supporting assembly fixes the optical lens group on one side of the image sensor, and the supporting assembly includes a first supporting member; the optical lens group comprises a plurality of first lenses and a plurality of second lenses, the first lenses can move along the axial direction of the camera module to change the focal length of the camera module, and the second lenses are used for filtering infrared light; the first lens is fixed on the first supporting piece, the second lens is arranged between the first supporting piece and the image sensor, and the second lens is provided with a lens surface which is used for participating in imaging of the optical lens group. Thus, the camera module can arrange a part of lenses on the first supporting piece, and the other part of lenses are fixed by other structures of the camera module. Because the fixed lens quantity is less in the single structure, so the lens is convenient for assemble, therefore can set up more lens quantity in the camera module, compare current camera module, its total lens quantity can increase, nevertheless the size of camera module itself does not increase, and the lens equipment is comparatively convenient, therefore can let the camera keep simple structure, compact in size, also have higher optical shooting performance.

In an alternative embodiment, the second lens has a first surface facing the object side and a second surface facing the image side, and at least one of the first surface and the second surface is a lens surface. Since the second lens element has a lens surface through which light can pass, the second lens element cooperates with other lens elements in the optical lens assembly to participate in optical imaging and correcting aberrations caused by other lens elements in the optical lens assembly.

As an alternative embodiment, at least one of the first surface and the second surface is aspherical. Compared with a spherical lens, the aspheric lens has thinner thickness and smaller mass, and can correct the aberration of the edge area of the lens, so that the second lens adopts an aspheric structure, the size and the mass of the lens are smaller, and the imaging effect is better.

As an optional implementation manner, the second lens includes a light filtering portion and a lens portion, which are stacked along an axial direction of the optical lens group, the light filtering portion is used for filtering infrared light, and the light filtering portion covers the second lens in a direction perpendicular to a circumferential direction of the optical lens group; the lens portion has a lens surface. The second lens can utilize different functional layers to realize respectively stopping different functions such as infrared ray or optical imaging like this, and the second lens is whole to constitute by simple stacked structure, is favorable to reducing the size of second lens in optical lens group axial ascending, and the size of camera module itself does not increase.

As an alternative embodiment, the optical filter portion in the second lens has a layered structure, and the optical filter portion has a uniform thickness in a radial direction of the second lens. The light filtering part has a relatively flat surface, is convenient for coating or forming, and can filter partial light according to specific requirements.

As an alternative embodiment, the filter may be used to filter out light in one or more different wavelength ranges. For example, in an alternative, the filter may filter out infrared light. In other alternative modes, the filter may filter light in the ultraviolet band, or filter light in a part of the visible band, such as red light. In some alternative ways, the filter part may filter light in multiple wavelength ranges simultaneously, for example, filter red light in infrared and visible bands simultaneously.

As an alternative embodiment, the coverage of the optical filter portion in the radial direction of the second lens is larger than the coverage of the lens portion in the radial direction of the second lens. Therefore, the light passing through the light filtering part can be prevented from being refracted at the edge of the lens part, and the interference of the light filtering part on the normal imaging of the optical lens group is avoided.

In an alternative embodiment, the second lens is a lens formed by molding the optical filter portion and the lens portion. Form the second lens through the mode of mould pressing like this, do not need extra fixed knot to construct, can let better combination between light filtering part and the lens portion be in the same place, the second lens structure of formation is comparatively simple, and can have comparatively compact size.

As an optional implementation manner, the lens portion is located on the image side or the object side of the optical filter portion.

As an alternative embodiment, the second lens includes two lens portions, and the two lens portions are respectively located at the image side of the optical filtering portion and at the object side of the optical filtering portion. Like this, set up more lens quantity in the camera module, compare current camera module, total lens quantity can increase, but the size of camera module itself does not increase, and this camera module has higher optical shooting performance relatively.

As an alternative, the first support is a lens barrel, and the first lens is disposed inside the lens barrel. The lens barrel can accommodate the first lens and shield and protect the first lens.

As an optional mode, the supporting assembly further includes a second supporting member and a third supporting member sequentially arranged along the axial direction of the optical lens group; the third supporting piece and the image sensor are relatively fixed, the first supporting piece is arranged on the second supporting piece, and the second lens is arranged on the third supporting piece. Therefore, the second lens and the first lens are respectively fixed by different supporting pieces, the assembly of the second lens is less influenced by the accumulated tolerance of the first lens, the assembly precision of the lenses can be effectively improved, and the assembly difficulty and the assembly cost are reduced; meanwhile, the second lens is arranged on the third supporting piece, and the first supporting piece only needs to fix the first lens, so that the first supporting piece can have compact size and size, the whole structure simplification and size compaction of the camera module are facilitated, the installation is convenient, and the lens is convenient to maintain and replace.

As an optional implementation manner, the camera module further includes a first driving motor, and the first driving motor is disposed between the first supporting member and the second supporting member, and is used for driving the first lens to move relative to the second supporting member. Thus, the first lens can be driven to move by the first driving motor, so as to perform focusing, zooming and other operations.

As an optional implementation manner, the camera module further includes a second driving motor, and the second driving motor is disposed between the third supporting member and the second lens, and is used for driving the second lens to move relative to the third supporting member. Like this second lens and first lens all connect in the camera module through driving motor, consequently first lens and the equal independent drive of second lens to realize stronger zooming or focusing performance.

As an alternative embodiment, at least one of the second supporting member and the third supporting member is a supporting frame surrounding the circumferential outer side of the optical lens group. Therefore, the optical lens group can be stressed in a balanced manner in the circumferential direction, so that the optical lens group is stably supported, and has higher structural reliability when zooming and focusing movement is carried out.

As an alternative embodiment, the second lens is disposed on the image sensor. The back focal length of the optical lens group can be shortened, so that the height of the whole camera module in the optical axis direction can be reduced, and the size of the camera module is more compact.

As an optional implementation mode, the ratio range of the distance dR between the second lens and the image surface to the back focal length BFL when the optical lens group is at the infinite object distance is more than or equal to 0 and less than or equal to | dR/BFL and less than or equal to 0.9.

As an alternative embodiment, one of the first and second surfaces is aspheric and the second lens has a ratio of the maximum thickness dlmax to the minimum thickness dlmax in the range of 1 ≦ dlmax/dlmin ≦ 5.

As an alternative embodiment, the ratio of the central thickness dl of the second lens to the total height TTL of the optical lens group is in the range of 0.01 ≦ dl/TTL ≦ 1.2.

In an alternative embodiment, the ratio of the focal length fl of the second lens element to the focal length f of the optical lens assembly is in the range of 1 ≦ fl/f ≦ 1000.

As an alternative embodiment, the refractive index nl of the material constituting the lens portion is in the range of 1. ltoreq. nl.ltoreq.1.7.

In an alternative embodiment, the Abbe's number vl of the material constituting the lens portion is in the range of 15 ≦ vl ≦ 60.

As an alternative embodiment, when the second lens is formed by a molding process, the method mainly includes the following steps:

coating: specifically, the optical filter portion may be provided in a cavity of a mold, and a lens material for constituting the lens portion may be provided on a surface of the optical filter portion.

And (3) curing: after the coating step is completed, the upper mold and the lower mold are closed, so that the lens material inside the cavity of the mold is molded to form the shape contour of the lens part, and the lens part is cured and molded.

Releasing step: after the lens part is cured, the mold can be separated from the second lens, thereby completing the step of separating the second lens.

The camera module that above-mentioned first aspect provided utilizes the second lens of independent setting, provides simultaneously and blocks infrared light and the function of participating in optical imaging, and current camera module relatively, the lens total quantity of camera module can increase, but the size of camera module itself does not increase, and the lens equipment is comparatively convenient, therefore can let the camera in keeping simple structure, compact volume while, also has higher optical shooting performance.

In a second aspect, the present application provides an electronic device, including a housing and the camera module in any one of the optional implementations of the first aspect, where the camera module is located inside the housing. The lens barrel and other first supporting parts of the camera module do not need to be provided with all lenses of the optical lens group, and the lenses are convenient to assemble, so that more lenses can be arranged in the camera module, and the camera module has higher optical shooting performance.

In an alternative embodiment, the second lens of the camera module has a first surface facing the object side and a second surface facing the image side, and at least one of the first surface and the second surface is a lens surface. Since the second lens element has a lens surface through which light can pass, the second lens element cooperates with other lens elements in the optical lens assembly to participate in optical imaging and correcting aberrations caused by other lens elements in the optical lens assembly.

As an alternative embodiment, at least one of the first and second surfaces of the second lens is aspheric. Compared with a spherical lens, the aspheric lens has thinner thickness and smaller mass, and can correct the aberration of the edge area of the lens, so that the second lens adopts an aspheric structure, the size and the mass of the lens are smaller, and the imaging effect is better.

In an alternative embodiment, the second lens is a lens formed by molding the optical filter portion and the lens portion. Form the second lens through the mode of mould pressing like this, do not need extra fixed knot to construct, can let better combination between light filtering part and the lens portion be in the same place, the second lens structure of formation is comparatively simple, and has comparatively compact size.

In an alternative embodiment, the lens portion of the second lens is located on the image side or the object side of the optical filter portion.

As an alternative embodiment, the second lens includes two lens portions, and the two lens portions are respectively located at the image side of the optical filtering portion and at the object side of the optical filtering portion. Like this, set up more lens quantity in electronic equipment's the camera module, compare current camera module, total lens quantity can increase, but the size of camera module itself does not increase, and this camera module has higher optical shooting performance relatively.

As an optional implementation manner, the camera module of the electronic device further includes a first driving motor, and the first driving motor is disposed between the first supporting member and the second supporting member, and is used for driving the first lens to move relative to the second supporting member. Thus, the first lens can be driven to move by the first driving motor, so as to perform focusing, zooming and other operations.

As an optional implementation manner, the camera module of the electronic device further includes a second driving motor, and the second driving motor is disposed between the third supporting member and the second lens, and is used for driving the second lens to move relative to the third supporting member. Like this second lens and first lens all connect in the camera module through driving motor, consequently first lens and the equal independent drive of second lens to realize stronger zooming or focusing performance.

As an optional implementation manner, in the support assembly of the camera module, at least one of the second support member and the third support member is a support frame that is disposed around the circumferential outer side of the optical lens group. Therefore, the optical lens group can be stressed in a balanced manner in the circumferential direction, so that the optical lens group is stably supported, and has higher structural reliability when zooming and focusing movement is carried out.

The camera module comprises an optical lens group, an image sensor and a supporting component, wherein the supporting component fixes the optical lens group on one side of the image sensor and comprises a first supporting piece; the optical lens group comprises a plurality of first lenses and a plurality of second lenses, the first lenses can move along the axial direction of the camera module to change the focal length of the camera module, and the second lenses are used for filtering infrared light; the first lens is fixed on the first supporting piece, the second lens is arranged between the first supporting piece and the image sensor, and the second lens is provided with a lens surface which is used for participating in imaging of the optical lens group. Compared with the existing camera module, the camera module has the advantages that the total number of the lenses is increased, the size of the camera module is not increased, and the lenses are convenient to assemble, so that the camera can have high optical shooting performance while keeping simple structure and compact size.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of an A-A cross-section of an electronic device provided by an embodiment of the present application;

fig. 3 is a schematic structural diagram of a conventional camera module;

fig. 4 is a schematic structural diagram of an optical lens group in a conventional camera module;

fig. 5 is a schematic external view of a camera module in an electronic device according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of the internal structure of the camera module shown in FIG. 5;

fig. 7 is a schematic view of a connection structure of a second lens and a support assembly in a camera module according to an embodiment of the present application;

fig. 8a is a schematic diagram illustrating a first position of an optical lens assembly when the camera module according to the embodiment of the present application zooms;

fig. 8b is a schematic diagram of a second position of the optical lens assembly when the camera module provided in the embodiment of the present application zooms;

FIG. 9 is a schematic structural diagram of a second lens provided in an embodiment of the present application;

FIG. 10 is a schematic front view of the second lens of FIG. 9;

FIG. 11a is a schematic cross-sectional view of a second lens according to an embodiment of the present disclosure;

FIG. 11b is a schematic diagram of a second cross-sectional structure of a second lens according to an embodiment of the present application;

FIG. 11c is a schematic view of a third cross-sectional structure of a second lens provided in the embodiments of the present application;

FIG. 12a is a schematic diagram of a coating step in a manufacturing process of a second lens according to an embodiment of the present disclosure;

FIG. 12b is a schematic view of a curing step in a second lens manufacturing process provided by an embodiment of the present application;

fig. 12c is a schematic view illustrating a release step in a manufacturing process of a second lens according to an embodiment of the present application;

FIG. 13 is a schematic view of a batch process for manufacturing second lenses according to an embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of another camera module provided in this embodiment of the present application;

FIG. 15 is a schematic view of the positioning of a second lens in the camera module of FIG. 14;

fig. 16 is a schematic structural diagram of another camera module provided in the embodiment of the present application;

FIG. 17 is a schematic view of the positioning of a second lens in the camera module of FIG. 16;

fig. 18 is a schematic structural diagram of another optical lens assembly in the camera module according to the embodiment of the present application;

FIG. 19a is a graph of axial chromatic aberration at infinite object distance for the optical lens assembly of FIG. 18;

FIG. 19b is a graph of axial chromatic aberration at an object distance of 80mm for the optical lens assembly of FIG. 18;

FIG. 20a is a graph of the lateral chromatic aberration at an infinite object distance for the optical lens assembly of FIG. 18;

FIG. 20b is a lateral chromatic aberration plot of the optical lens assembly of FIG. 18 at an object distance of 80 mm;

FIG. 21a is a first graph of optical distortion at infinity object distance for the optical lens assembly shown in FIG. 18;

FIG. 21b is a graph showing the second optical distortion curve at infinite object distance for the optical lens assembly shown in FIG. 18;

FIG. 21c is a first graph of optical distortion at an object distance of 80mm for the optical lens assembly shown in FIG. 18;

FIG. 21d is a second graph of optical distortion of the optical lens assembly shown in FIG. 18 at an object distance of 80 mm;

fig. 22 is a schematic structural diagram of another optical lens assembly provided in the present application;

FIG. 23a is a graph of axial chromatic aberration at infinite object distance for the optical lens assembly of FIG. 22;

FIG. 23b is a graph of axial chromatic aberration at an object distance of 80mm for the optical lens assembly of FIG. 22;

FIG. 24a is a graph of the lateral chromatic aberration at infinity object distance for the optical lens assembly of FIG. 22;

FIG. 24b is a graph of lateral chromatic aberration for the optical lens assembly of FIG. 22 at an object distance of 80 mm;

FIG. 25a is a graph showing the first optical distortion curve at infinity object distance for the optical lens assembly shown in FIG. 22;

FIG. 25b is a graph showing the second optical distortion curve at infinite object distance for the optical lens assembly shown in FIG. 22;

FIG. 25c is a graph of first optical distortion at an object distance of 80mm for the optical lens assembly shown in FIG. 22;

FIG. 25d is a second graph of optical distortion of the optical lens assembly of FIG. 22 at an object distance of 80 mm;

fig. 26 is a schematic structural diagram of a third optical lens group in the camera module according to the embodiment of the present application;

FIG. 27a is a graph of axial chromatic aberration at infinite object distance for the optical lens assembly of FIG. 26;

FIG. 27b is a graph of axial chromatic aberration at an object distance of 80mm for the optical lens assembly of FIG. 26;

FIG. 28a is a graph of lateral chromatic aberration at infinity object distance for the optical lens assembly of FIG. 26;

FIG. 28b is a graph of lateral chromatic aberration for the optical lens assembly of FIG. 26 at an object distance of 80 mm;

FIG. 29a is a graph of first optical distortion at infinity object distance for the optical lens assembly shown in FIG. 26;

FIG. 29b is a graph showing the second optical distortion curve at infinite object distance for the optical lens assembly shown in FIG. 26;

FIG. 29c is a graph of first optical distortion at an object distance of 80mm for the optical lens assembly shown in FIG. 26;

FIG. 29d is a graph showing the second optical distortion curve of the optical lens assembly of FIG. 26 at an object distance of 80 mm;

fig. 30 is a schematic structural diagram of a fourth optical lens group in the camera module according to the embodiment of the present application;

FIG. 31a is a graph of axial chromatic aberration at infinite object distance for the optical lens assembly of FIG. 30;

FIG. 31b is a graph of axial chromatic aberration of the optical lens assembly of FIG. 30 at an object distance of 80 mm;

FIG. 32a is a graph of lateral chromatic aberration at infinity object distance for the optical lens assembly of FIG. 30;

FIG. 32b is a graph of lateral chromatic aberration for the optical lens assembly of FIG. 30 at an object distance of 80 mm;

FIG. 33a is a graph of first optical distortion at infinity object distance for the optical lens assembly shown in FIG. 30;

FIG. 33b is a graph showing the second optical distortion curve at infinite object distance for the optical lens assembly shown in FIG. 30;

FIG. 33c is a graph of first optical distortion at an object distance of 80mm for the optical lens assembly shown in FIG. 30;

FIG. 33d is a graph showing the second optical distortion curve of the optical lens assembly of FIG. 30 at an object distance of 80 mm;

fig. 34 is a schematic structural diagram of a fifth optical lens group in the camera module according to the embodiment of the present application;

FIG. 35a is a graph of axial chromatic aberration at infinity object distance for the optical lens assembly of FIG. 34;

FIG. 35b is a graph of axial chromatic aberration at an object distance of 80mm for the optical lens assembly of FIG. 34;

FIG. 36a is a graph of the lateral chromatic aberration at infinity object distance for the optical lens assembly of FIG. 34;

FIG. 36b is a graph of lateral chromatic aberration for the optical lens assembly of FIG. 34 at an object distance of 80 mm;

FIG. 37a is a graph showing the first optical distortion curve at infinity object distance for the optical lens assembly shown in FIG. 34;

FIG. 37b is a graph showing the second optical distortion curve at infinite object distance for the optical lens assembly shown in FIG. 34;

FIG. 37c is a graph of first optical distortion at an object distance of 80mm for the optical lens assembly shown in FIG. 34;

FIG. 37d is a second graph of optical distortion of the optical lens assembly shown in FIG. 34 at an object distance of 80 mm.

Description of reference numerals:

1.1 a, 101, 102, 103, 104, 105-optical lens group; 2-an image sensor; 3-a circuit board; 4-a first drive motor; 5-a support assembly; 6-an optical filter; 7-a second drive motor; 11. 11 a-a first lens; 12. 12a, 12b, 12c, 12d, 12 e-a second lens; 21-a photosensitive array; 51-a first support; 51 a-lens barrel; 52-a second support; 52 a-filter holder; 53-a third support; 80-mold, 81-upper mold, 82-lower mold, 121-optical filter part; 122-a lens portion; 122 a-lens material;

100. 300, 400-camera module; 200-an electronic device;

f1 — first surface; f2 — second surface;

s11, S21, S31, S41, S51-first lens, S12, S22, S32, S42, S52-second lens, S13, S23, S33, S43, S53-third lens; s14, S24, S34, S44, S54-fourth lens; s15, S25, S35, S45, S55-fifth lens; s16, S26, S36, S46, S56, S66 — sixth lens; s17, S47, S57-seventh lens.

Detailed Description

With the increasing functionality of electronic devices, camera modules are often included in electronic devices. The camera module can shoot and collect external images, so that the electronic equipment can realize functions of shooting or video call and the like.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Fig. 2 is a schematic cross-sectional view of a cross section a-a of an electronic device provided in an embodiment of the present application. As shown in fig. 1 and fig. 2, taking the electronic device 200 as a mobile phone as an example, the camera module 100 may be disposed on the mobile phone, and for example, the camera module 100 may be disposed on a side of the housing 201 of the mobile phone facing the user, or on a side of the housing 201 of the mobile phone facing away from the user. In order to protect the camera module 100, the camera module 100 can be disposed inside the casing 201, and the casing 201 has a lens hole 202 at a position corresponding to the camera module 100, so that external light can be emitted into the camera module 100 normally. In addition, the electronic device 200 may also include various components such as a screen, a main board, a middle frame structure, and the like, which are not described herein again. The electronic device according to the embodiment of the present application may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a Point of Sales (POS), a vehicle-mounted computer, a smart home device, or the like.

As shown in fig. 2, the camera module 100 specifically includes different components such as an optical lens assembly 1 and an image sensor 2. The image sensor 2 is integrated with a photosensitive array 21, and can collect and sense an external image, convert an external image picture into a corresponding electrical signal through a photoelectric conversion function, and output the electrical signal. Those skilled in the art will appreciate that the image sensor 2 includes, but is not limited to, a Complementary Metal Oxide Semiconductor (CMOS) Device, a Charge-coupled Device (CCD), and other devices and devices.

Since the photosensitive array 21 of the image sensor 2 has a smaller area, the optical lens assembly 1 is disposed on one side, for example, the photosensitive side, of the photosensitive array 21 of the image sensor 2 in order to focus the external image onto the photosensitive array 21 of the image sensor 2. The optical lens assembly 1 has a light-permeable lens, so that external light can be converged onto the photosensitive array 21 of the image sensor 2 through the lens, and an image is formed.

In addition, in order to realize the normal shooting operation of the camera module 100, the camera module 100 may further include, but is not limited to, components such as the circuit board 3 and the driving motor.

The circuit board 3 can be used as a main carrier and a control component of the camera module 100. The image sensor 2 may be disposed on the circuit board 3 and electrically connected to the circuit board 3. Therefore, the image information captured by the image sensor 2 can be transmitted to the circuit board 3, so that the circuit board 3 can output to other components of the electronic device 200. The circuit board 3 may also supply power to the image sensor 2 and control the image sensor 2. The Circuit Board 3 may be a Printed Circuit Board (PCB) or other Circuit Board forms commonly used by those skilled in the art. In addition, the circuit board 3 may be provided thereon with Surface Mount Devices (SMDs) to perform various circuit functions.

The driving motor may be connected to the optical lens assembly 1, and drives at least some lenses of the optical lens assembly 1 to move in an axial direction (e.g., Z-axis direction) of the camera module 100, so that the optical lens assembly 1 performs zooming and focusing operations; or in the planar direction of the photosensitive array of the image sensor 2 (e.g. in the planar direction of the X-axis and the Y-axis, along the X-axis and/or the Y-axis), so that the optical lens assembly 1 performs an optical anti-shake operation. Here, the axial direction of the camera module 100 may also be referred to as an optical axis direction. The specific manner and principle of the optical lens assembly 1 for performing focusing operation and optical anti-shake operation can refer to the focusing and optical anti-shake functions of the existing camera module, and are not described herein again. The number of the driving motors may be one or more than one, in the camera module shown in fig. 2, the driving motors include a first driving motor 4, and the first driving motor 4 is used for driving part or all of the lenses in the optical lens assembly 1 to move so as to perform focusing and zooming operations. Illustratively, the first drive motor 4 may be a Voice Coil Motor (VCM).

In order to fix and position each lens in the optical lens group 1, the camera module further comprises a supporting component 5, and the supporting component 5 can support part or all of the lenses of the lens group 1, so that the lenses have a determined position relative to the image sensor 2, and smooth imaging of the optical lens group 1 is ensured.

In addition, camera module 100 during operation needs to filter the inside external light that gets into camera module 100, with the light filtering of infrared ray wave band wherein to avoid infrared light to shine to image sensor 2's sensitization array 21, and disturb image sensor's normal sensitization and shooting, be provided with in the camera module and can filter and block the infrared ray, still allow the infrared filtering structure that visible light passed through.

In order to perform zooming and focusing operations, the optical lens assembly 1 needs to be movably disposed with respect to a photosensitive element such as the image sensor 2. Therefore, the optical lens assembly 1 can be disposed at the far end of the image sensor 2 in the camera module 100, i.e. at the end far away from the image sensor 2, and the infrared filtering structure for blocking infrared light can be located between the optical lens assembly 1 and the image sensor, so that the movement of the optical lens assembly has less influence on the infrared filtering structure.

In the existing camera module, an infrared filter (IR filter) can be utilized to filter and obstruct infrared rays. The infrared filter is also called an infrared cut-off filter, is arranged between an image sensor of the camera module and a shot object, and can filter infrared light and transmit visible light. Because human eyes and the image sensor respond to different wavelength ranges of light, human eyes cannot feel the light in an infrared band, and the image sensor can detect and sense infrared light. In order to avoid the interference of infrared light on the normal imaging of the image sensor, an infrared filter is required to be disposed in front of the light sensing surface of the image sensor to block the infrared light.

Fig. 3 is a schematic structural diagram of a conventional camera module. As shown in fig. 3, in a conventional camera module 100a, an image sensor 2 is disposed on a circuit board 3, an optical lens group 1a and an infrared filter 6 are sequentially disposed on a light-sensing side of the image sensor 2, the optical lens group 1a is mounted and positioned through a lens barrel 51a, and the infrared filter 6 is disposed on a filter frame 52a, so that infrared light can be filtered through the infrared filter 6. The infrared filter 6 is generally a flat plate-shaped structure with a small thickness, and can filter infrared light through its own material properties or a plated film, and only allow visible light to pass through. Thus, the external light enters the optical lens assembly 1a first time, and the refraction of the first lens 11a in the optical lens assembly 1a is utilized to realize the imaging; the light emitted from the optical lens group 1a passes through the infrared filter 6a, the infrared light is filtered, and then the light is collected and photographed by the image sensor 2.

Fig. 4 is a schematic structural diagram of an optical lens group in a conventional camera module. As shown in fig. 4, in order to realize optical imaging, the optical lens assembly 1a may have a first lens 11a capable of transmitting light, and the light transmitted through the first lens 11a is deflected by refraction of the first lens 11a, so as to converge the light and finally form an image. Specifically, the optical lens assembly 1a includes a plurality of first lenses 11a disposed at intervals in a front-back direction along an optical axis of the optical lens assembly 1a, and orientations of the first lenses 11a are all kept consistent, so that the optical axes of the first lenses 11a all face the same direction, i.e. a Z-axis direction in the figure, and the first lenses 11a can form the optical lens assembly 1a for imaging.

In the conventional camera module 100a, in order to arrange the plurality of first lenses 11a in the optical lens group 1a along the optical axis in a predetermined order and at predetermined intervals, the lens barrel 51a is included in the supporting assembly. The lens barrel 51a has a hollow cylindrical structure with both ends open, and the length direction of the lens barrel 51a and the optical axis direction of the first lens 11a are kept consistent. At this time, the first lenses 11a in the optical lens group 1a are all fixed in the hollow inner cavity of the lens barrel 51 a.

In order to make the optical lens assembly 1a have good optical imaging quality, for example, to achieve a larger maximum aperture, the optical lens assembly 1a should have a larger number of first lenses 11a, and the first lenses 11a can correct the aberration when the optical lens assembly 1a images through the mutual optical action, so as to present better imaging quality. However, when the first lens 11a is assembled in the lens barrel 51a, a certain tolerance may be accumulated due to manufacturing and assembling errors, and the tolerance may affect the optical imaging accuracy of the first lens 11 a. When the number of the first lens 11a is larger, a larger tolerance is formed accordingly. Therefore, in the conventional camera module 100a, it is difficult to realize a large number of lenses (the number of lenses is greater than 7) in the optical lens assembly, which restricts the image quality of the camera module from being improved.

Therefore, this application provides a new camera module, can let have as much as possible lens quantity in the camera module to improve camera module optical imaging quality, make camera module have better shooting ability. The following describes the specific structure of the camera module in detail by taking the specific embodiment as an example.

In the camera module 100 of the present application, the camera module may include an optical lens assembly 1, an image sensor 2, a circuit board 3, a driving motor, and other different components. Fig. 5 is an outline schematic diagram of a camera module in an electronic device according to an embodiment of the present application. Fig. 6 is a schematic view of the internal structure of the camera module in fig. 5. As shown in fig. 5 and fig. 6, the camera module 100 further includes a second lens 12 in addition to the existing first lens 11, the second lens 12 is used as a part of the optical lens assembly 1 of the camera module 100 and participates in the optical imaging of the camera module 100; at the same time, the second lens 12 can block infrared rays, but still allow visible light to pass through. Thus, the infrared rays are blocked by the second lens 12 when passing through the second lens 12, thereby achieving the infrared filtering effect of the camera module 100.

At this time, similar to the other first lens elements 11 in the optical lens assembly 1, the second lens element 12 has a first surface F1 facing the object side and a second surface F2 facing the image side. At least one of the first surface F1 and the second surface F2 is a lens surface, and thus can participate in imaging and correcting aberrations caused by other lenses of the optical lens assembly 1. The lens surface is a curved surface protruding or recessed along the extending direction of the optical axis of the optical lens assembly 1, and the light entering the second lens element 12 can change the light path due to the curved surface shape of the lens surface when the light is refracted on the lens surface. Therefore, the light path of the incident light is changed through the lens surface, and the incident light can be correspondingly converged or diverged, so as to participate in imaging. The lens surface of the second lens 12 and the lens surfaces of the first lens 11 jointly participate in the imaging of the optical lens group 1.

As shown in fig. 6, in the second lens 12, the first surface F1 is a curved surface that is convex or concave in the direction in which the optical axis extends, and the first surface F1 is a lens surface. Similarly, the convex or concave surface of the first lens 11 in the extending direction of the optical axis may also constitute lens surfaces, which have the effect of converging or diverging light, and the external light passes through the lens surfaces, i.e. the external light is correspondingly diverged or converged by refraction of the lens surfaces, so as to perform imaging.

Since the second lens element 12 has a lens surface, the lens surface of the second lens element 12 and other lens elements in the optical lens assembly 1 can work cooperatively, and when an incident light ray enters the optical lens assembly 1 and encounters the lens surface, the incident light ray can be refracted at the lens surface, and divergence or convergence can be realized. Through the sequential divergence or convergence of the incident light by the multiple lens surfaces in the optical lens group 1, the optical imaging of the light on the image sensor 2 can be realized. In some embodiments, the lens surface of the second optic 12 is aspheric.

As shown in fig. 6, in the camera module 100 of the present embodiment, most of the lenses in the optical lens assembly 1, for example, the first lens 11, are mounted in the first supporting member 51, and can be driven by the first supporting member 51 to move relative to the image sensor 2 along the axial direction of the camera module 100, so as to change the focal length of the camera module 100, and implement zooming or focusing operations. The second lens 12 is not directly connected to the first support 51, but is located between the first support 51 and the image sensor 2, so that the second lens 12 is independently installed relative to other first lenses 11 installed in the first support 51, and is less affected by the accumulated tolerance of the first lenses 11 in the first support 51. Optionally, the first support 51 may be a lens barrel with two open ends, and the first lens 11 is disposed in an inner cavity of the lens barrel. In addition, the first support member 51 may be a support member of other forms and shapes that is provided around the outer side of the first lens 11 in the circumferential direction.

In the present application, since the second lens 12 can participate in the optical imaging while blocking the infrared ray, the second lens 12 can exist as a part of the optical lens assembly 1 and participate in the imaging, so that all the lenses of the optical lens assembly 1 do not need to be installed in the first supporting member 51. Compare with the current camera module that fig. 3 shows, at the whole length and size of camera module, under the same condition of lens quantity that lens barrel structure and lens cone can hold, camera module 100 in this application, the lens quantity of participating in formation of image that actually includes in its optical lens group 1 will be more than prior art's camera module, therefore can be under the prerequisite that the process degree of difficulty is the same, realize more lens quantities, and then have better optical imaging quality and performance, the shooting picture quality of camera module has been improved.

Specifically, the camera module 100 of this application, its lens quantity that can participate in optical imaging can be one more than the lens quantity of the conventional camera module of equal specification. For example, in the existing camera module, the optical lens group 1 may include 7 first lenses 11 for optical imaging, so that the aberration during large-aperture imaging can have a better correction effect to achieve large-aperture shooting with F1.4 or more. In contrast, in the camera module 100 of the present application, in addition to the 7 first lenses 11 installed inside the first supporting member 51, the second lens 12 not fixed by the first supporting member 51 also participates in imaging, so that the optical lens assembly 1 actually includes 8 optical imaging lenses, thereby achieving better optical quality and larger aperture shooting effect (for example, achieving the maximum aperture of F1.2 or even F1.0).

Specifically, the camera module of this application, Modulation Transfer Function (MTF) of the part visual field can improve 8% -10% under the object distance of infinity, and the MTF of the part visual field can improve about 10% -15% under the microspur.

In each lens of the optical lens assembly 1, the second lens 12 is not fixed on the first supporting member 51 as the first lens 11, but is located outside the first supporting member 51, so that the second lens 12 can have a more flexible position and fixing manner compared to other first lenses 11 in the optical lens assembly 1, and the following description will specifically describe the arrangement manner of the second lens 12.

In order to fix and position the second lens 12, besides the first supporting member 51, a supporting frame or the like is included in the supporting assembly 5, and the supporting frame can support the second lens 12 and other parts of the optical lens assembly 1, so that the lenses have a certain spatial position relative to the image sensor, thereby ensuring that the lenses can be smoothly imaged.

Alternatively, as shown in fig. 6, in order to position the second lens 12 and the first lens 11 in the optical lens assembly 1, the supporting assembly 5 of the camera module 100 further includes a second supporting member 52 and a third supporting member 53, the first supporting member 51 can be disposed on the second supporting member 52, and the second lens 12 can be mounted on the third supporting member 53.

The camera module 100 may include a circuit board 3, and components and structures such as the image sensor 2 and the support component 5 in the camera module 100 may be directly or indirectly disposed on the circuit board 3. At this time, the third support member 53 may be mounted on the circuit board 3, and the second support member 52 is disposed on a side of the third support member 53 facing away from the circuit board 3. Wherein the second support 52 and the third support 53 may be detachably or non-detachably connected to each other. For example, the second and third supporting

members

52 and 53 may be bonded using an adhesive. It can be understood that the second supporting member 52 and the third supporting member 53 can be a bracket, and the second supporting member 52 and the third supporting member 53 can be disposed around the circumference of the optical lens assembly 1, so that the optical lens assembly 1 is evenly stressed in the circumference.

Specifically, in order to realize the focusing operation of the camera module 100, the camera module 100 has the first driving motor 4 therein, and the first supporting member 51 is connected to the movable portion of the first driving motor 4, and the second supporting member 52 is connected to the fixed portion of the first driving motor 4. Thus, the first driving motor 4 can drive the first support 51 to move relative to the second support 52, thereby completing focusing, zooming, optical anti-shake and the like.

Fig. 7 is a schematic view of a connection structure of a second lens and a supporting component in a camera module according to an embodiment of the present disclosure. As shown in fig. 7, the third supporting member 53 is mounted on the circuit board 3, and a position of the third supporting member 53 opposite to the image sensor has an avoiding structure, so that the light normally passes through an area where the third supporting member 53 is located, and the second lens 12 can be disposed on the avoiding structure of the third supporting member 53. At this time, the second lens element 12 is located between the other lens elements of the optical lens assembly 1 and the image sensor 2. The avoiding structure may be in different forms such as a light hole 531.

As an alternative, the third support member 53 may have a mounting surface 532 for mounting and supporting the second lens 12, the mounting surface 532 being located at an edge of the avoiding structure to ensure normal light transmission of the second lens 12 while the second lens 12 is being manufactured.

It is understood that, in order to avoid affecting the normal light transmission of the optical lens assembly 1, the second supporting member 52 and the third supporting member 53 may be disposed around the circumferential outer side of the optical lens assembly 1 while achieving the supporting function. At this time, the second support member 52 and the third support member 53 may have a structure having a clearance area in the middle, such as a ring shape or a cylindrical shape.

When the camera module 100 is integrally assembled, the second lens 12 may be disposed on the third supporting member 53, and then the second supporting member 52 and the third supporting member 53 are assembled on the circuit board 3. Thus, different support frames are utilized to support and position the second lens 12 and the other first lenses 11 in the optical lens group 1, the assembly relationship between the second lens 12 and the other first lenses 11 in the optical lens group 1 is relatively independent, no large accumulated error is generated, and the second lens 12 can still normally participate in optical imaging.

At this time, since the first supporting member 51 is mounted on the second supporting member 52 by the first driving motor 4, the first lens 11 fixed in the first supporting member 51 can move along the optical axis direction in a direction approaching the image sensor 2 or a direction away from the image sensor 2, so as to implement the zooming or focusing operation of the camera module 100.

Specifically, fig. 8a is a schematic diagram of a first position of an optical lens assembly of the camera module in zooming according to the embodiment of the present application. Fig. 8b is a schematic diagram of a second position of the optical lens assembly when the camera module provided in the embodiment of the present application zooms. As shown in fig. 8a and 8b, the first driving motor 4 can drive the first support 51 to move in a direction close to the image sensor 2 or away from the image sensor 2 (i.e., in the direction of the arrow in the figure) to zoom in or out the object to be zoomed.

At this time, in the entire optical lens assembly 1, the first lens element 11 located in the first supporting member 51, i.e. the lens element on the object side of the second lens element 12, moves along the optical axis relative to the second lens element 12, and the second lens element 12 itself remains in a stationary state relative to the image sensor 2.

In addition, the second lens 12 may also be disposed in other ways commonly used by those skilled in the art, and is not limited herein.

In order to ensure proper imaging of the optical lens assembly 1, the second lens element 12 may have a certain size range or a certain position range. The following is a description of the range of possible sizes and positions of the second lens 12:

in some embodiments, when one of the first surface F1 and the second surface F2 of the second lens 12 is aspheric and the other is planar, the maximum thickness of the second lens 12 can be defined as dlmax and the minimum thickness of the second lens 12 is dlmin. While the ratio of the maximum thickness to the minimum thickness of the second lens 12 may have a range: the | dlmax/dlmin | is more than or equal to 1 and less than or equal to 5.

Alternatively, when the first surface F1 or the second surface F2 of the second lens 12 is aspheric, the aspheric surface may have a variety of different types and shapes. The specific shape of the aspheric surface, i.e., the non-curved surface type, can be obtained by an aspheric equation. In some of these embodiments, the aspheric surface may have an even aspheric surface profile; in yet other embodiments, the aspheric surface may have an extended aspheric surface profile.

Illustratively, the surface type of the even aspheric surface may be defined using, but not limited to, the following aspheric surface equation (1):

wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex curvature of the aspheric surface, K is the conic constant, A₂,A₃,A₄,A₅,A₆,A₇,A₈Are all aspheric coefficients.

While the surface shape of the extended aspheric surface can be defined using, but not limited to, the following aspheric surface equation (2):

wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex curvature of the aspheric surface, K is the conic constant, A₂,A₃,A₄,A₅,A₆Are aspheric coefficients.

Therefore, the aspheric surface shape can be limited and solved through different aspheric surface formulas, and the corresponding aspheric surface shape can be obtained by setting different parameters.

In the optical lens assembly 1, when the lens surface of the first lens element 11 is aspheric in addition to the lens surface of the second lens element 12, the specific aspheric shape can be obtained by defining the aspheric surface according to the above aspheric surface equations (1) and (2).

In some embodiments, the ratio of the center thickness of the second lens element 12 to the Total Track Length (TTL) of the optical lens assembly 1 may have a range. Specifically, the central thickness of the second lens 12 can be defined as dl, and the ratio of the central thickness of the second lens 12 to the total height of the optical lens assembly 1 ranges from: dl/TTL is more than or equal to 0.01 and less than or equal to 1.2.

In some embodiments, the focal length of the second lens element 12 can be defined as fl, and the ratio of the focal length fl to the focal length f of the optical lens assembly 1 can range from: the | fl/f | is more than or equal to 1 and less than or equal to 1000.

The second lens 12 may have a smaller distance from the image sensor 2 than the first lens 11. In some embodiments, there may be a distance dR between the second lens element 11 and the surface of the photosensitive array 21, i.e. the image surface, and a ratio between the distance dR and a Back Focal Length (BFL) of the optical lens assembly 1 at an infinite object distance may be in a range of: the absolute dR/BFL is more than or equal to 0 and less than or equal to 0.9. The rear focal length of the optical lens assembly 1 refers to a distance from a center of a last optical surface (i.e. the second surface F2 of the second lens element 12) close to the image side of the optical lens assembly 1 to the image side focal point.

In order to allow the second lens 12 to achieve the functions of blocking infrared rays and participating in optical imaging, the second lens 12 may be composed of different parts and structures, and the second lens 12 may be, for example, a Lens On Package (LOP). Specifically, the second lens 12 may be a laminated structure formed by sequentially laminating different functional layers, and different functions of blocking infrared rays or optical imaging are respectively realized by using the different functional layers.

Fig. 9 is a schematic structural diagram of a second lens provided in an embodiment of the present application. Fig. 10 is a schematic front view of the second lens of fig. 9. As an alternative embodiment, as shown in fig. 9 and 10, the second lens 12 may include a filter 121 that can block infrared rays but still allow visible light to pass through, and the filter 121 covers all areas of the second lens 12 in a direction perpendicular to the optical axis, so as to block out infrared rays passing through all areas of the second lens 12.

The optical filter 121 may be implemented in various ways to block infrared rays. For example, an infrared cut film layer is plated on the surface of the optical filter 121, or the entire optical filter 121 is formed of a material capable of blocking infrared rays. The filter portion 121 may specifically adopt an absorption-type cut filter method, a reflection-type cut filter method, or a combination of the absorption-type cut filter method and the reflection-type cut filter method to block and filter infrared rays. Taking the absorption-type cut-off filtering manner as an example of the filtering portion 121, the filtering portion 121 contains copper ions, and the copper ions can filter out light rays in the infrared band, thereby completing the effect of cutting off infrared rays. In addition, the filter 121 may also be an infrared absorbing pigment, an infrared reflecting film, or other infrared filtering methods and materials commonly used by those skilled in the art, and will not be described herein.

In order to make the second lens element 12 participate in the optical imaging of the lens assembly, the second lens element 12 further includes a lens portion 122, the lens portion 122 and the filter portion 121 are disposed along the optical axis, and the lens portion 122 is located on at least one of an object side and an image side of the second lens element 12. At this time, the lens portion 122 forms at least one side surface of the second lens 12, that is, at least one of the first surface F1 and the second surface F2 of the second lens 12 is located on the lens portion 122.

Specifically, the first surface F1 or the second surface F2 of the second lens 12 may have negative power, so that the light rays transmitted through the first surface F1 or the second surface F2 are in a divergent state; either the first surface F1 or the second surface F2 may have positive optical power so that light rays passing through the first surface F1 or the second surface F2 are in a converged state.

In order to achieve the infrared blocking effect, the optical filter 121 needs to be coated with an infrared blocking film layer or formed of a material capable of blocking infrared rays, and the optical filter 121 needs to have a relatively flat surface for easy coating or molding. Therefore, the entire filter portion 121 of the second lens element 12 has a uniform thickness and a flat surface, and the lens portion 122 of the second lens element 12 is mainly used for participating in the imaging of the optical lens assembly 1.

In order to prevent the structure of the optical filter portion 121 from interfering with the normal imaging of the lens portion 122, the coverage of the optical filter portion 121 in the radial direction of the second lens 12 may be larger than the coverage of the lens portion 122, so as to prevent the light passing through the optical filter portion 121 from being refracted at the edge of the lens portion 122 to interfere with the normal imaging of the optical lens assembly 1.

It will be appreciated that, as shown in fig. 10, in some embodiments, the front shape of the lens portion 122 of the second optic 12 may be circular to enable normal optical imaging of the second optic 12; and the filter part 121 may have a frontal shape in a square shape for convenience of manufacturing and positioning with other components. The edge of the filter portion 121 is located outside the radial coverage of the lens portion 122 on the second lens 12.

Fig. 11a is a schematic cross-sectional view of a second lens according to an embodiment of the present disclosure. As shown in fig. 11a, in an alternative lens structure, the lens portion 122 of the second lens element 12 is located on an object side of the optical filter portion 121, and the optical filter portion 121 is located on an image side of the second lens element 12. At this time, the first surface F1 of the second lens 12 is aspheric, and the second surface F2 of the second lens 12 is a plane perpendicular to the optical axis.

In this way, a certain concave-convex shape is formed between the first surface F1 and the second surface F2 of the second lens 12, so that the light irradiated to the second lens 12 has a diverging or converging effect, thereby enabling the second lens 12 to participate in imaging and correcting the aberration of the lens assembly during imaging. The filter part 121 of the second lens 12 can still maintain the effect of filtering infrared rays, and the image sensor is prevented from detecting infrared rays and affecting imaging.

Fig. 11b is a schematic cross-sectional view of a second lens according to an embodiment of the present application. As shown in fig. 11b, in another alternative lens structure, the lens portion 122 of the second lens element 12 is located on the image side of the optical filter portion 121, and the optical filter portion 121 is located on the object side of the second lens element 12. At this time, the first surface F1 of the second lens 12 is a plane perpendicular to the optical axis, and the second surface F2 of the second lens 12 is an aspheric surface. At this time, the second lens 12 is similar to the first lens structure, and the detailed description thereof is omitted.

Fig. 11c is a schematic cross-sectional view of a second lens according to an embodiment of the present application. As shown in fig. 11c, in yet another alternative lens structure, two lens portions 122 of the second lens 12 are respectively located at two sides of the optical filter portion 121 along the optical axis direction. In this way, the lens portion 122 includes the lens portions 122 in both the object side of the second lens 12 and the image side of the second lens 12, and is interposed between the two lens portions 122. At this time, both the first surface F1 and the second surface F2 of the second lens 12 are aspheric.

In particular, for convenience of description, the present embodiment describes a structure in which the lens portion 122 of the second lens element 12 is located on the object side of the second lens element 12, and the optical filter portion 121 is located on the image side of the second lens element 12.

In order to provide the second lens 12 with good optical quality, the lens portion 122 can be made of the same material or similar optical properties as the other lenses in the lens assembly. As an alternative, the lens portion 122 may be made of a transparent plastic material. Thus, the lens portion 122 can have a light weight while having a high light transmittance, which facilitates reducing the overall weight of the lens assembly.

It is understood that the portions of the second lens 12 can be made of glass, plastic, etc. as is commonly used by those skilled in the art, and can be selected according to the actual optical design and requirements, without limitation.

In some alternative embodiments, the refractive index nl range of the material comprising the lens portion 122 may be: nl is more than or equal to 1 and less than or equal to 1.7. In yet other alternative embodiments, the abbe number vl of the material comprising lens portion 122 may be in the range: vl is more than or equal to 15 and less than or equal to 60.

In forming the second lens 12, the second lens 12 can be formed by a number of different methods, and the method of forming the second lens 12 is described below.

In an alternative manufacturing method, the second lens 12 may be formed by molding. Since the second lens 12 includes different components such as the optical filter 121 and the lens 122, the optical filter 121 and the lens 122 are stacked in the optical axis direction of the second lens 12. In this case, the optical filter part 121 is first manufactured, and the lens material is molded on the surface of the optical filter part 121 by a molding method.

Specifically, when the second lens 12 is formed by molding, the manufacturing process may generally include several steps of coating, curing, and releasing, which will be described in detail below:

a coating step is first required before molding and curing. Fig. 12a is a schematic view of a coating step in a manufacturing process of a second lens according to an embodiment of the present application. As shown in fig. 12a, the mold 80 for performing mold pressing includes an upper mold 81 and a lower mold 82, and in the coating step, the optical filter 121 may be disposed in a cavity of the lower mold 82, and a lens material 122a for constituting the lens part 122 may be disposed on a surface of the optical filter 121.

The main body of the optical filter 121 may be made of glass or the like, and the optical filter 121 is formed by doping copper ions or the like into the optical filter 121 or plating an infrared reflective film on the surface of the optical filter 121. The lens material 122a may be transparent plastic or transparent resin. The melting point of the optical filter portion 121 is higher than that of the lens material 122a, and the optical filter portion 121 is not melted or deformed during the molding process of the lens material 122 a.

Fig. 12b is a schematic view of a curing step in a manufacturing process of a second lens according to an embodiment of the present application. As shown in fig. 12b, after the lens material 122a is provided on the surface of the optical filter portion 121 and the coating step of fig. 12a is completed, the upper mold 81 and the lower mold 82 are clamped, the lens material 122a inside the cavity of the mold 80 is molded to form the contour of the lens portion 122, and the lens portion 122 is cured and molded. The specific curing manner in the curing step may be set according to the specific material constituting the lens portion 122, for example, when the lens material 122a constituting the lens portion 122 has a heat hardening property, the lens portion 122 may be cured and molded by a heat curing manner; when the lens material 122a constituting the lens portion 122 is a photosensitive material, the lens portion 122 may be cured and molded by a photo-curing means.

Fig. 12c is a schematic diagram of a release step in a manufacturing process of the second lens according to the embodiment of the present application. As shown in fig. 12c, after the lens portion 122 is cured, the mold 80 is separated from the second lens 12, thereby completing the releasing step of the second lens 12. At this time, the filter portion 121 and the lens portion 122 in the second lens 12 are closely attached and bonded in the molding process, thereby forming an integrated lens.

Therefore, the second lens 12 is formed by a die pressing method, an additional fixing structure is not needed, the filtering part 121 and the lens part 122 can be well combined together, and the formed second lens 12 is simple in structure.

In order to improve the production efficiency when producing the second lens 12, a plurality of second lenses 12 may be simultaneously produced in a batch by using the same optical filter section 121. Fig. 13 is a schematic process diagram for batch manufacturing of second lenses according to an embodiment of the present disclosure. As shown in fig. 13, a plurality of lens materials may be simultaneously disposed on the surface of the optical filter portion 121, and the plurality of lens materials may be simultaneously molded by a mold, so that a plurality of lens portions 122 may be formed on the same optical filter portion 121; a plurality of individual second lenses 12 are then formed by cutting. At this time, in order to facilitate cutting, the lens portions 122 are formed in an array in the plane direction of the filter portion 121, and accordingly, the cutting lines L between the lens portions 122 are also in a crisscross shape.

In this embodiment, the camera module includes an optical lens group, an image sensor and a supporting assembly, the supporting assembly fixes the optical lens group on a photosensitive side of the image sensor, and the supporting assembly includes a first supporting member; the optical lens group comprises a first lens and a second lens, the first lens is fixed on the first supporting piece, the second lens is positioned outside the first supporting piece, and the second lens is used as a part of the optical lens group and participates in optical imaging; meanwhile, the second lens can also block infrared rays, but still allows visible light to penetrate through. Therefore, the first supporting piece of the camera module does not need to be provided with all lenses of the optical lens group, one part of the lenses can be arranged on the first supporting piece, and the other part of the lenses is fixed by utilizing other structures of the camera module. Because the fixed lens quantity is less in the single structure, so the lens is convenient for assemble, therefore can set up more lens quantity in the camera module, compare current camera module, its total lens quantity can increase, nevertheless the size of camera module itself does not increase, and the lens equipment is comparatively convenient, therefore can let the camera keep simple structure, compact in size, also have higher optical shooting performance.

Optionally, in the camera module of the present application, the second lens 12 may also have a different arrangement from the foregoing embodiment. Fig. 14 is a schematic structural diagram of another camera module provided in the embodiment of the present application. Fig. 15 is a schematic view of a positioning manner of the second lens in the camera module of fig. 14. As shown in fig. 14 and fig. 15, in this embodiment, the camera module 300 has a similar overall structure, function and working principle as those of the foregoing embodiments, and is not described herein again; in the present embodiment, the difference from the previous embodiment is that the second lens 12 may not be directly fixed on the third support 53, but indirectly connected through the second driving motor 7 and the third support 53.

At this time, in addition to the first driving motor 4, the camera module 300 further includes a second driving motor 7, and the second driving motor 7 is used for driving the second lens 12 to move back and forth along the optical axis direction, so as to implement focusing or zooming operation of the camera module 300 together with the other first lenses 11 in the optical lens group 1.

Specifically, the second drive motor 7 has a movable portion and a fixed portion, the second lens 12 is disposed on the movable portion of the second drive motor 7, and the fixed portion of the second drive motor 7 is fixed to the third support 53. In performing a focusing or zooming operation, the second lens 12 may be moved relative to the third support 53 by the driving of the second driving motor 7. Wherein the second drive motor 7 may be of similar construction and type as the first drive motor 4. Illustratively, both the first drive motor 4 and the second drive motor 7 may be voice coil motors.

It can be understood that the first driving motor 4 and the second driving motor 7 can both drive the lens to move along the optical axis, and therefore, the second lens 12 and the other first lens 11 in the optical lens assembly 1 can both move relative to the image sensor 2, thereby achieving stronger focusing or zooming capability. In addition, at least one of the first and

second driving motors

4 and 7 may move the lens in other directions (for example, X-axis and/or Y-axis) to realize the optical anti-shake function.

In this embodiment, the second lens and the first lens are both connected to the camera module through the driving motor, so that the first lens and the second lens can be independently driven, thereby realizing stronger zooming or focusing performance.

Alternatively, the second lens 12 may be disposed in other ways or at other locations than on a dedicated support structure, such as directly on the image sensor 2. Fig. 16 is a schematic structural diagram of another camera module according to an embodiment of the present application. Fig. 17 is a schematic view of a positioning manner of the second lens in the camera module of fig. 16. As shown in fig. 16 and 17, the camera module 400 has a similar overall structure, function and operation principle as the previous embodiment, and will not be described herein again; the camera module 400 of the present embodiment is different from the previous embodiments in that the supporting frame in the supporting assembly 5 still includes a second supporting member and a third supporting member 53, the second supporting member 52 is mounted on the third supporting member 53, and the second supporting member 52 is located on a side of the third supporting member 53 away from the image sensor 2, and the second lens 12 is not made of an additional supporting structure, but is directly disposed on the image sensor 2.

In this case, similar to the previous method, the second support 52 and the third support 53 are connected to each other, the first support 51 is connected to the second support 52, and the first lenses 11 except the second lenses 12 of the optical lens assembly 1 are accommodated in the first supports 51. The second lens 12 is no longer fixed by means of the support member 5, but is disposed directly above the image sensor 2. Specifically, the second lens 12 may be attached to the photosensitive array 21 of the image sensor 2.

Like this with the mode of second lens 12 direct setting on image sensor 2, the back focal length of optical lens group 1 can shorten to let whole camera module 400 highly can reduce in the optical axis direction, make the size of camera module compacter.

As an alternative structure, in the positioning manner, the second supporting member 52 and the third supporting member 53 may also be an integral structure, so that the structure of the supporting assembly 5 is simpler and the manufacturing cost is lower.

In this embodiment, the second lens of camera module directly sets up on image sensor, and the height of camera module in the optical axis direction is less, and the size is comparatively compact.

Optionally, referring to fig. 18, fig. 18 is a schematic structural diagram of another optical lens group in the camera module provided in the embodiment of the present application. As shown in fig. 18, in the

optical lens assembly

101, 8 lenses are sequentially disposed at intervals along the optical axis direction, wherein 7 first lenses 11 close to the object side are all fixed by the same support (not shown), and the lens close to the image side is the second lens 12 a.

Specifically, in the optical lens assembly 101, the first lens element S11, the second lens element S12, the third lens element S13, the fourth lens element S14, the fifth lens element S15, the sixth lens element S16, the seventh lens element S17 and the second lens element 12a are arranged in order from the object side to the image side. The image side of the second lens element 12a is a photosensitive surface formed by the photosensitive array 21 of the image sensor 2. In the optical lens assembly 101 composed of the lenses, the first surface of the second lens 12a is aspheric, and the second surface is a plane. When the camera module is focusing, the second lens 12a is fixed relative to the image sensor 2, and the other lenses move relative to the second lens 12a and the image sensor 2 to realize zooming and focusing.

Each of the lenses has a different imaging focal length and lens shape, as described in detail below.

The first lens element S11 has positive power, and the ratio of the focal length f1 of the first lens element S11 to the total focal length of the optical lens assembly 101, i.e. the focal length f of the lens assembly: 0.927, | f1/f |;

the second lens S12 has negative power, the ratio of the focal length f2 to the lens focal length f of the second lens S12: 2.258, | f2/f |;

the third lens S13 has negative power, the ratio of the focal length f3 to the lens focal length f of the third lens S13: 4.031, | f3/f |;

the fourth lens S14 has positive power, the ratio of the focal length f4 to the lens focal length f of the fourth lens S14: 1.806, | f4/f |;

the fifth lens S15 has negative power, the ratio of the focal length f5 to the lens focal length f of the fifth lens S15: 14.133, | f5/f |;

the sixth lens S16 has positive power, the ratio of the focal length f6 to the lens focal length f of the sixth lens S16: 1.246, | f6/f |;

the seventh lens S17 has negative power, the ratio of the focal length f7 to the lens focal length f of the seventh lens S17: 0.786, | f7/f |;

the second lens 12a has negative focal power, and the ratio of the focal length fl of the second lens 12a to the focal length f of the lens is: fl/f 5.933.

In the optical lens assembly 101 composed of the above lenses, when the distance dR between the second lens 12a and the image sensor 2 and the object distance at infinity are determined, the ratio between the back focal length BFL of the optical lens assembly, i.e., | dR/BFL |, is 0.642.

In the optical lens assembly, a ratio of the central thickness dl of the second lens 12a to the total height TTL of the optical lens assembly 101, i.e., | dl/TTL |, is 0.022.

And the contrast value | dlmax/dlmin | -1.941 between the maximum thickness dlmax of the second lens 12a and the minimum thickness dlmin of the second lens 12 a.

The ratio (TTL/EFL) between the total height of the optical lens group 101 and the Effective Focal Length (EFL) is 1.204.

The ratio (IH/EFL) between the Image Height (IH) and the effective focal length EFL of the optical lens assembly 101 is 0.851.

Data of the optical lens group 101 having the above-described structure are shown in tables 1 to 4. The optical parameters of the optical lens assembly 101 with the above structure are shown in table 1.

Table 1 main optical parameters of the optical lens assembly 101

Focal length F	5.641mm
		F value (focal length/entrance pupil diameter)	1.71
Imaging height IH	4.8mm
		Half Field of View (FOV of View)	37.8°
Length of after coke BFL	1.077mm
		Total height TTL	6.794mm
Design wavelength	650nm,610nm,555nm,510nm,470nm

When the object distance is infinity, the optical parameters of each lens in the optical lens assembly 101 are shown in table 2. The surface numbers in table 2 are those of the respective lenses shown in fig. 18.

TABLE 2 optical parameters of the lenses of the optical lens assembly 101

In table 2, the lens thickness specifically includes two thickness parameters, namely, the thickness of the optical center of the lens itself and the thickness of the space between the lens center and the next lens center toward the image side. As shown in fig. 18, the optical centers of the lenses in the optical lens group 101 are all located on the optical axis L-L'. Taking the first lens S11 as an example, it has a surface R1 and a surface R2, and the thickness of the optical center portion of the first lens S11 (the distance between the optical center o1 of the surface R1 and the optical center o2 of the surface R2) is d1, and the distance between the optical center o2 of the surface R2 of the first lens S11 and the optical center o3 of the surface R3 of the second lens S12 is a 1. By analogy, d2 represents the thickness of the optical center of the second lens S12, a2 represents the thickness of the interval between the optical center o4 of the surface R4 and the optical center o5 of the surface R5 of the second lens S12, and the definitions of the lens thicknesses d3-d9 and a3-a9 are similar to the definitions of the lens thicknesses d1 and a1, and are not repeated here. In the following, unless otherwise specified, the lens thickness including the above thickness parameters is taken as an example for explanation.

In the optical lens group 101 in the above table, the stop is located 0.580mm behind the vertex of the first face.

It is understood that in the optical lens assembly 101, the first surface of the second lens element 12a is the surface with the lens surface serial number R15, and the second surface is the surface with the lens surface serial number R17.

In the optical lens group 101, the surfaces with serial numbers R1-R15 on the lens surfaces are all lens surfaces, and these lens surfaces can converge or diverge incident light by using their own curved surface shapes, thereby realizing imaging. Wherein, the lens surfaces with the serial numbers of R1-R15 all participate in the imaging of the optical lens group 101.

Optionally, in the optical lens group, the lens surface may be aspheric. The specific shape of the aspherical surface, that is, the non-curved surface type can be obtained by the aspherical surface formulae (1) and (2) of the foregoing embodiment. The image side surface or the object side surface of the lens can be an aspheric surface, and the specific shape of the aspheric surface, namely the aspheric surface shape, can be obtained by an aspheric surface formula. The aspheric surface can have various types, and the aspheric surface types can be divided according to formula characteristics for solving the aspheric surface type. In some of these embodiments, the aspheric surface may have an even aspheric surface profile; in yet other embodiments, the aspheric surface may have an extended aspheric surface profile.

wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, and c is notSpherical curvature of spherical apex, K being conic constant, A₂,A₃,A₄,A₅,A₆,A₇,A₈Are all aspheric coefficients.

The aspheric coefficients of each lens in the aspheric formula are shown in table 3:

TABLE 3 aspherical surface coefficients of the lenses of the optical lens assembly 101

Therefore, the actual surface shape of each aspheric surface in the lens can be obtained according to the above table 3 and the surface shape formula of the aspheric surface.

In addition, in the above optical lens group, when the object distance is infinite and 80mm, the corresponding element interval W (the distance between the optical center o6 on the lens surface closest to the image side in the optical lens group 101 and the photosensitive array 21 of the image sensor 2) is as shown in table 4.

TABLE 4 Interval elements of optical lens group 101

Object distance	∞	80mm
			Interval of constituent elements	0.268mm	0.663mm

Fig. 19a is a graph of axial chromatic aberration at an infinite object distance for the optical lens assembly shown in fig. 18. FIG. 19b is a graph of axial chromatic aberration at an object distance of 80mm for the optical lens assembly shown in FIG. 18. Fig. 19a and 19b specifically illustrate the difference of the optical lens group 101 when light with different wavelengths is converged. Where the ordinate in fig. 19a and 19b represents the aperture size and the abscissa represents the simulation result of the light focusing depth position of different wavelengths. The five curves in fig. 19a and 19b correspond to colors of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 19a and 19b, the axial chromatic aberration of the optical lens assembly 101 is controlled within a small range.

Fig. 20a is a lateral chromatic aberration diagram of the optical lens assembly shown in fig. 18 at an infinite object distance. FIG. 20b is a lateral chromatic aberration diagram of the optical lens assembly shown in FIG. 18 at an object distance of 80 mm. Fig. 19a and 19b show in detail the coordinate positions at different wavelengths of light. Where the ordinate in fig. 20a and 20b represents the image height and the abscissa represents the XY coordinate position of light of different wavelengths. The five curves in fig. 20a and 20b correspond to colors of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 20a and 20b, the lateral chromatic aberration of the optical lens assembly is within the diffraction range.

Fig. 21a is a first graph of optical distortion at infinite object distance for the optical lens assembly shown in fig. 18. Fig. 21b is a graph illustrating the optical distortion curve of the optical lens assembly shown in fig. 18 at an infinite object distance. Fig. 21c is a first graph of optical distortion of the optical lens assembly shown in fig. 18 at an object distance of 80 mm. FIG. 21d is a second graph of optical distortion of the optical lens assembly shown in FIG. 18 at an object distance of 80 mm. In fig. 21a to 21d, the abscissa represents the difference between the imaging deformation and the ideal imaging, and the ordinate represents the image height. Specifically, in fig. 21a and 21c, the abscissa measures millimeters, and in fig. 21b and 21d, the abscissa measures percentages. As can be seen from fig. 21a to 21d, the distortion of the image formed by the optical lens assembly is controlled within the range of visual recognition (below 2%, it is not recognizable by the naked eye).

Therefore, in the optical lens assembly in the embodiment, the optical lens assembly includes 7 first lenses and 1 second lens, optical imaging is realized by converging or diverging light rays through each lens, aberration of imaging is corrected, and under the combined action of each lens in the optical lens assembly, the optical lens assembly has better control capability on aberration of imaging, and has better optical imaging quality.

In this embodiment, the camera module includes an optical lens group, an image sensor and a supporting assembly, the supporting assembly fixes the optical lens group on a photosensitive side of the image sensor, and the supporting assembly includes a first supporting member; the optical lens group comprises a first lens and a second lens, the first lens is fixed on the first supporting piece, the second lens is positioned outside the first supporting piece, and the second lens is used as a part of the optical lens group and participates in optical imaging; meanwhile, the second lens can also block infrared rays, but still allows visible light to penetrate through. Therefore, the first supporting piece of the camera module does not need to be provided with all lenses of the optical lens group, a part of lenses can be arranged on the first supporting piece, and the other part of lenses are fixed by other structures of the camera module. Because the fixed lens quantity of single structural department is less, and the lens is convenient for assemble, therefore can set up more lens quantity in the camera module, compare current camera module, its total lens quantity can increase, nevertheless the size of camera module itself does not increase, and the lens equipment is comparatively convenient, therefore can let the camera keep simple structure, compact in size, also have higher optical shooting performance.

Optionally, referring to fig. 22, fig. 22 is a schematic structural diagram of another optical lens group provided in the embodiment of the present application. As shown in fig. 22, in the

optical lens assembly

102, 7 lenses are sequentially disposed at intervals along the optical axis direction, wherein 6 first lenses 11 close to the object side are all fixed by the lens barrel, and the lens close to the image side is the second lens 12 b.

Specifically, in the optical lens assembly 102, the first lens element S21, the second lens element S22, the third lens element S23, the fourth lens element S24, the fifth lens element S25, the sixth lens element S26 and the second lens element 12b are arranged in order from the object side to the image side. The image side of the second lens element 12b is the photosensitive surface formed by the photosensitive array 21 of the image sensor 2. In the optical lens assembly composed of the lenses, the first surface of the second lens 12b is aspheric, and the second surface is a plane. At this time, when the camera module is focusing, the position of the second lens 12b relative to the image sensor 2 is fixed, and the other lenses move relative to the second lens 12b and the image sensor 2 to realize zooming and focusing.

Each lens has a different imaging focal length and lens shape. The following are detailed separately:

the first lens S21 has positive optical power, and the ratio of the focal length f1 to the lens focal length f of the first lens S21 is: 0.909, | f1/f |;

the second lens S22 has negative power, the ratio of the focal length f2 to the lens focal length f of the second lens S22: 2.538, | f2/f |;

the third lens S23 has positive power, the ratio of the focal length f3 to the lens focal length f of the third lens S23: 4.190, | f3/f |;

the fourth lens S24 has negative power, the ratio of the focal length f4 to the lens focal length f of the fourth lens S24: 4.931, | f4/f |;

the fifth lens S25 has positive power, the ratio of the focal length f5 to the lens focal length f of the fifth lens S25: 0.669, | f5/f |;

the sixth lens S26 has negative power, the ratio of the focal length f6 to the lens focal length f of the sixth lens S26: 0.53, | f6/f |;

the second lens 12b has negative focal power, and the ratio of the focal length fl of the second lens 12b to the focal length f of the lens is: fl/f |, 7.77.

In the optical lens assembly 102 composed of the above lenses, when the distance dR between the second lens 12b and the image sensor 2 and the object distance at infinity are reached, the ratio between the back focal length BFL of the optical lens assembly, i.e., | dR/BFL |, is 0.356.

In the optical lens assembly, a ratio between a central thickness dl of the second lens 12b and a total length TTL of the optical lens assembly, that is, | dl/TTL | ═ 0.033; the contrast value | dlmax/dlmin |, between the maximum thickness dlmax of the second lens 12b and the minimum thickness dlmin of the second lens 12b is 2.067; the ratio (TTL/EFL) between the total height and the effective focal length of the optical lens group 102 is 1.229; the ratio (IH/EFL) between the image height and the effective focal length of the optical lens group is 0.879.

Data of the optical lens group 102 having the above-described structure are shown in tables 5 to 8. The optical parameters of the optical lens assembly 102 with the above structure are shown in table 5.

TABLE 5 Primary optical parameters of the optical lens assembly 102

Focal length F	3.683mm
		F value (focal length/entrance pupil diameter)	1.853
Imaging height IH	3.238mm
		Half Field of View (FOV of View)	40.5°
Length of after coke BFL	0.921mm
		Total height TTL	4.528mm
Design wavelength	650nm,610nm,555nm,510nm,470nm

When the object distance is infinity, the optical parameters of each lens in the optical lens assembly 102 are shown in table 6. The surface numbers in table 6 are those of the respective lenses shown in fig. 22.

TABLE 6 optical parameters of the lenses of the optical lens assembly 102

The definition of the thickness of the lens in table 6 is similar to that of the optical lens group 101, in particular, the optical centers of the lenses in the optical lens group 102 are all located on the same optical axis, and the first lens S21 has a surface R1 and a surface R2. The thickness of the optical center of the first lens S21 is d 1; the distance between the optical center of the surface R2 of the first lens S21 and the optical center of the surface R3 of the second lens S22 is a 1. Similarly, the definitions of d2-d9 and a2-a9 are similar to the definitions of d1 and a1, and reference may be made to the description of optical lens assembly 101, and further description is omitted here.

In the optical lens group 102 in the above table, the stop is located 0.419mm behind the vertex of the first face.

It is understood that in the optical lens assembly 102, the first surface of the second lens element 12b is the surface with the lens surface number R13, and the second surface is the surface with the lens surface number R15.

In the optical lens assembly 102, the surfaces from the serial number R1 to the serial number R13 are all lens surfaces, and the lens surfaces can converge or diverge incident light by using their own curved surface shapes, so as to realize imaging. The lens surfaces with serial numbers R1-R15 all participate in the imaging of the optical lens assembly 102.

In the optical lens group, the lens surface of the lens may be an aspheric surface, and the specific shape of the aspheric surface, i.e. the aspheric surface type, can be obtained by the aspheric surface formulas (1) and (2) of the foregoing embodiments.

The aspheric coefficients of the respective lenses in the aspheric formula are shown in table 7:

TABLE 7 aspherical surface coefficients of the respective lenses of the optical lens assembly 102

Therefore, the actual surface shape of each aspherical surface in the lens can be obtained according to the above table 7 and the surface shape formula of the aspherical surface.

In addition, in the above optical lens group 102, when the object distance is infinite and 80mm, the corresponding element intervals (the distance between the optical center of the lens surface closest to the image side in the optical lens group and the photosensitive array 21 of the image sensor 2, similar to the optical lens group 101) are as shown in table 8.

TABLE 8 group element spacing of optical lens group 102

Object distance	∞	80mm
			Interval of constituent elements	0.234mm	0.401mm

Fig. 23a is a graph of axial chromatic aberration at an infinite object distance for the optical lens assembly shown in fig. 22. FIG. 23b is a graph of axial chromatic aberration of the optical lens assembly shown in FIG. 22 at an object distance of 80 mm. Fig. 23a and 23b specifically illustrate the difference in convergence of the optical lens group 102 under different wavelengths of light. Where the ordinate in fig. 23a and 23b represents the aperture size and the abscissa represents the simulation result of the focal depth position of light of different wavelengths. The five curves in fig. 23a and 23b correspond to colors of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 23a and 23b, the axial aberration of the optical lens assembly 102 is controlled within a small range.

Fig. 24a is a lateral chromatic aberration diagram of the optical lens assembly shown in fig. 22 at an infinite object distance. FIG. 24b is a lateral chromatic aberration diagram of the optical lens assembly shown in FIG. 22 at an object distance of 80 mm. Fig. 24a and 24b specifically show coordinate positions at different wavelengths of light. Where the ordinate in fig. 24a and 24b represents the image height and the abscissa represents the XY coordinate position of light of different wavelengths. The five curves in fig. 24a and 24b correspond to colors of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 24a and 24b, the lateral chromatic aberration of the optical lens assembly 102 is within the diffraction range.

Fig. 25a is a first graph of optical distortion at infinite object distance for the optical lens assembly shown in fig. 22. Fig. 25b is a graph illustrating the optical distortion curve of the optical lens assembly shown in fig. 22 at an infinite object distance. Fig. 25c is a first graph of optical distortion of the optical lens assembly of fig. 22 at an object distance of 80 mm. FIG. 25d is a second graph of optical distortion of the optical lens assembly shown in FIG. 22 at an object distance of 80 mm. In fig. 25a to 25d, the abscissa represents the difference between the imaging deformation and the ideal imaging, and the ordinate represents the image height. Specifically, in fig. 25a and 25c, the abscissa measures millimeters, and in fig. 25b and 25d, the abscissa measures percentages. As can be seen from fig. 25a to 25d, the distortion of the image formed by the optical lens assembly is controlled within the range of visual recognition (below 2%, it is not recognizable by the naked eye).

The optical lens group of the present embodiment includes 6 first lenses and 1 second lens, and realizes optical imaging by converging or diverging light rays through each lens, and corrects imaging aberration, and under the combined action of each lens in the optical lens group, the optical lens group of the optical lens group has better control capability on imaging aberration, and has better optical imaging quality.

In this embodiment, the camera module includes an optical lens group, an image sensor and a supporting assembly, the supporting assembly fixes the optical lens group on a photosensitive side of the image sensor, and the supporting assembly includes a first supporting member; the optical lens group comprises a first lens and a second lens, the first lens is fixed on the first supporting piece, the second lens is positioned outside the first supporting piece, and the second lens is used as a part of the optical lens group and participates in optical imaging; meanwhile, the second lens can also block infrared rays, but still allows visible light to penetrate through. Therefore, the first supporting piece of the camera module does not need to be provided with all lenses of the optical lens group, one part of the lenses can be arranged on the first supporting piece, and the other part of the lenses is fixed by utilizing other structures of the camera module. Because the fixed lens quantity of single structural department is less, and the lens is convenient for assemble, therefore can set up more lens quantity in the camera module, compare current camera module, its total lens quantity can increase, nevertheless the size of camera module itself does not increase, and the lens equipment is comparatively convenient, therefore can let the camera keep simple structure, compact, simultaneously, has higher optical shooting performance.

Optionally, referring to fig. 26, fig. 26 is a schematic structural diagram of a third optical lens group in the camera module according to the embodiment of the present application. As shown in fig. 26, in the

optical lens assembly

103, 7 lenses are sequentially disposed at intervals along the optical axis direction, wherein 6 first lenses 11 close to the object side are all fixed by the lens barrel, and the lens close to the image side is the second lens 12 c.

Specifically, in the optical lens assembly 103, the first lens element S31, the second lens element S32, the third lens element S33, the fourth lens element S34, the fifth lens element S35, the sixth lens element S36 and the second lens element 12c are arranged in order from the object side to the image side. The image side of the second lens element 12c is a photosensitive surface formed by the photosensitive array 21 of the image sensor 2. In the optical lens assembly composed of the lenses, the first surface of the second lens 12c is aspheric, and the second surface is planar. At this time, when the camera module is focusing, the position of the second lens 12c relative to the image sensor 2 is fixed, and the other lenses move relative to the second lens 12c and the image sensor 2 to realize zooming and focusing.

The first lens S31 has positive optical power, and the ratio of the focal length f1 to the lens focal length f of the first lens S31 is: 0.916, | f1/f |;

the second lens S32 has negative power, the ratio of the focal length f2 to the lens focal length f of the second lens S32: 2.510, | f2/f |;

the third lens S33 has positive power, the ratio of the focal length f3 to the lens focal length f of the third lens S33: 10.366, | f3/f |;

the fourth lens S34 has negative power, the ratio of the focal length f4 to the lens focal length f of the fourth lens S34: 3.028, | f4/f |;

the fifth lens S35 has positive power, the ratio of the focal length f5 to the lens focal length f of the fifth lens S35: 0.618, | f5/f |;

the sixth lens S36 has negative power, the ratio of the focal length f6 to the lens focal length f of the sixth lens S36: 0.59, | f6/f |;

the second lens 12c has a negative focal power, and the ratio of the focal length fl of the second lens 12c to the focal length f of the lens is: fl/f |, 6.76.

The total focal length of the optical lens assembly 103 is the lens focal length f.

In the optical lens assembly 103 composed of the above lenses, when the distance dR between the second lens 12c and the image sensor 2 and the infinite object distance are equal, the ratio of the rear focal length BFL of the optical lens assembly 103, i.e., | dR/BFL |, is 0.234.

In the optical lens group, a ratio of a central thickness dl of the second lens 12c to a total height TTL of the optical lens group, that is, | dl/TTL |, is 0.030; the contrast value | dlmax/dlmin | -3.154 between the maximum thickness dlmax of the second lens 12c and the minimum thickness dlmin of the second lens 12 c; the ratio between the total height and the effective focal length (TTL/EFL) of the optical lens group 103 is 1.245; the ratio (IH/EFL) between the image height and the effective focal length of the optical lens assembly 103 is 0.802.

Data of the optical lens group 103 having the above-described structure are shown in tables 9 to 12. The optical parameters of the optical lens assembly 103 with the above structure are shown in table 9.

TABLE 9 Main optical parameters of the optical lens assembly 103

Focal length F	4.035mm
		F value	1.705
Image height IMH	3.238mm
		Half field angle FOV	38.4°
Length of after coke BFL	1.062mm
		Total height TTL	5.025mm
Design wavelength	650nm,610nm,555nm,510nm,470nm

When the object distance is infinity, the optical parameters of each lens in the optical lens assembly 103 are shown in table 10. The surface numbers in table 10 are those of the respective lenses shown in fig. 26.

TABLE 10 optical parameters of the lenses of the optical lens assembly 103

The definition of the thickness of the lens in table 10 is similar to that of the optical lens group 101, in particular, the optical centers of the lenses in the optical lens group 103 are all located on the same optical axis, and the first lens S31 has a surface R1 and a surface R2. The thickness of the optical center of the first lens S31 is d 1; the optical center of the surface R2 of the first lens S31 and the optical center of the surface R3 of the second lens S32 are spaced apart by a 1. Similarly, the definitions of d2-d9 and a2-a9 are similar to the definitions of d1 and a1, and reference may be made to the description of optical lens assembly 101, and further description is omitted here.

In the optical lens group 103 of the above table, the stop is located 0.585mm behind the apex of the first face.

It is understood that in the optical lens assembly 103, the first surface of the second lens element 12c is the surface with the lens surface number R13, and the second surface is the surface with the lens surface number R15.

In the optical lens assembly 103, the surfaces from the serial number R1 to the serial number R13 are all lens surfaces, and the lens surfaces can converge or diverge incident light by using their own curved surface shapes, so as to realize imaging of the optical lens assembly 103. Wherein, the lens surfaces with the serial numbers of R1-R13 all participate in the imaging of the optical lens group 103.

In the optical lens group 103, the lens surface of the lens can be aspheric, and the specific shape of the aspheric surface, i.e. the aspheric surface type, can be obtained by the aspheric surface formulas (1) and (2) in the foregoing embodiments.

The aspherical surface coefficients of the respective lenses in the aspherical surface formula are shown in table 11:

TABLE 11 aspherical surface coefficients of the respective lenses of the optical lens assembly 103

Therefore, the actual surface shape of each aspherical surface in the lens can be obtained according to the above table 11 and the surface shape formula of the aspherical surface.

In addition, in the above optical lens group 103, when the object distance is infinite and 80mm, the corresponding element intervals (the distance between the optical center of the lens surface closest to the image side in the optical lens group 103 and the photosensitive array 21 of the image sensor 2, similar to the optical lens group 101) are as shown in table 12.

TABLE 12 group element spacing of the optical lens group 103

Object distance	∞	80mm
			Interval of constituent elements	0.453mm	0.655mm

Fig. 27a is a graph of axial chromatic aberration at infinite object distance for the optical lens assembly shown in fig. 26. FIG. 27b is a graph of axial chromatic aberration at an object distance of 80mm for the optical lens assembly shown in FIG. 26. Fig. 27a and 27b specifically show the difference of the optical lens group when they converge at different wavelengths. Where the ordinate in fig. 27a and 27b represents the aperture size and the abscissa represents the simulation result of the light focusing depth position at different wavelengths. The five curves in fig. 27a and 27b correspond to colors of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 27a and 27b, the axial aberration of the optical lens assembly is controlled within a small range.

Fig. 28a is a lateral chromatic aberration diagram of the optical lens assembly shown in fig. 26 at an infinite object distance. FIG. 28b is a lateral chromatic aberration diagram of the optical lens assembly of FIG. 26 at an object distance of 80 mm. Fig. 28a and 28b specifically show coordinate positions at different wavelengths of light. In fig. 28a and 28b, the ordinate represents the image height, and the abscissa represents the XY coordinate position of light of different wavelengths. The five curves in fig. 28a and 28b correspond to colors of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 28a and 28b, the lateral chromatic aberration of the optical lens assembly is within the diffraction range.

Fig. 29a is a first graph of optical distortion at infinite object distance for the optical lens assembly shown in fig. 26. Fig. 29b is a graph illustrating the optical distortion curve of the optical lens assembly shown in fig. 26 at an infinite object distance. Fig. 29c is a first graph of optical distortion of the optical lens assembly of fig. 26 at an object distance of 80 mm. FIG. 29d is a second graph of optical distortion of the optical lens assembly of FIG. 26 at an object distance of 80 mm. In fig. 29a to 29d, the abscissa represents the difference between the imaging deformation and the ideal imaging, and the ordinate represents the image height. Specifically, in fig. 29a and 29c, the abscissa measures in millimeters, and in fig. 29b and 29d, the abscissa measures in percentage. As can be seen from fig. 29a to 29d, the distortion of the image formed by the optical lens assembly is controlled within the range of visual recognition (below 2%, it is not recognizable by the naked eye).

In this embodiment, the camera module includes an optical lens group, an image sensor and a supporting assembly, the supporting assembly fixes the optical lens group on a photosensitive side of the image sensor, and the supporting assembly includes a first supporting member; the optical lens group comprises a first lens and a second lens, the first lens is fixed on the first supporting piece, the second lens is positioned outside the first supporting piece, and the second lens is used as a part of the optical lens group and participates in optical imaging; meanwhile, the second lens can also block infrared rays, but still allows visible light to penetrate through. The first supporting piece of the camera module does not need to be provided with all lenses of the optical lens group, one part of the lenses can be arranged on the first supporting piece, and the other part of the lenses is fixed by utilizing other structures of the camera module. Because the fixed lens quantity of single structural department is less, and the lens is convenient for assemble, therefore can set up more lens quantity in the camera module, compare current camera module, its total lens quantity can increase, nevertheless the size of camera module itself does not increase, and the lens equipment is comparatively convenient, therefore can let the camera keep simple structure, compact, simultaneously, has higher optical shooting performance.

Optionally, referring to fig. 30, fig. 30 is a schematic structural diagram of a fourth optical lens group in the camera module according to the embodiment of the present application. As shown in fig. 30, in the

optical lens assembly

104, 8 lenses are sequentially disposed at intervals along the optical axis direction, wherein 8 first lenses 11 close to the object side are all fixed by the lens barrel, and the lens close to the image side is the second lens 12 d.

Specifically, in the optical lens assembly 104, the first lens element S41, the second lens element S42, the third lens element S43, the fourth lens element S44, the fifth lens element S45, the sixth lens element S46, the seventh lens element S47 and the second lens element 12d are arranged in order from the object side to the image side. The image side of the second lens element 12d is a photosensitive surface formed by the photosensitive array 21 of the image sensor 2. In the optical lens assembly composed of the lenses, the first surface of the second lens 12d is aspheric, and the second surface is a plane. At this time, when the camera module is focusing, the position of the second lens 12d relative to the image sensor 2 is fixed, and the other lenses move relative to the second lens 12d and the image sensor 2 to realize zooming and focusing.

The first lens S41 has positive optical power, and the ratio of the focal length f1 to the lens focal length f of the first lens S41 is: 0.772, | f1/f |;

the second lens S42 has negative power, the ratio of the focal length f2 to the lens focal length f of the second lens S42: 1.744, | f2/f |;

the third lens S43 has negative power, the ratio of the focal length f3 to the lens focal length f of the third lens S43: 91.38, | f3/f |;

the fourth lens S44 has positive power, the ratio of the focal length f4 to the lens focal length f of the fourth lens S44: 148.33, | f4/f |;

the fifth lens S45 has negative power, the ratio of the focal length f5 to the lens focal length f of the fifth lens S45: 5.54 | f5/f |;

the sixth lens S46 has positive power, the ratio of the focal length f6 to the lens focal length f of the sixth lens S46: 1.049, | f6/f |;

the seventh lens S47 has negative power, the ratio of the focal length f7 to the lens focal length f of the seventh lens S47: 1.012, | f7/f |;

the second lens 12d has negative focal power, and the ratio of the focal length fl of the second lens 12d to the focal length f of the lens is as follows: fl/f |, 3.00.

The total focal length of the optical lens assembly 104 is the lens focal length f.

In the optical lens assembly 104 composed of the above lenses, when the distance dR between the second lens 12d and the image sensor 2 and the infinite object distance are equal, the ratio of the rear focal length BFL of the optical lens assembly 104, i.e., | dR/BFL |, is 0.

In the optical lens group, a ratio of a central thickness dl of the second lens 12d to a total height TTL of the optical lens group 104, that is, | dl/TTL | ═ 0.022; the contrast value | dlmax/dlmin | -3.414 between the maximum thickness dlmax of the second lens 12d and the minimum thickness dlmin of the second lens 12 d; the ratio (TTL/EFL) between the total height and the effective focal length of the optical lens group 104 is 1.116; the ratio (IH/EFL) between the image height and the effective focal length of the optical lens assembly 104 is 0.788.

Data of the optical lens group 104 having the above-described structure are shown in tables 13 to 16. The optical parameters of the optical lens assembly 104 with the above structure when the object distance is infinite are shown in table 13.

TABLE 13 Primary optical parameters of the optical lens assembly 104

Focal length F	6.062mm
		F value	1.838
Image height IMH	4.8mm
		Half field angle FOV	38.2°
Length of after coke BFL	1.219mm
		Total height TTL	6.8mm
Design wavelength	650nm,610nm,555nm,510nm,470nm

When the object distance is infinity, the optical parameters of each lens in the optical lens assembly 104 are shown in table 14. The surface numbers in table 14 are those of the respective lenses shown in fig. 30.

TABLE 14 optical parameters of the lenses of the optical lens assembly 104

The definition of the thickness of the lens in table 14 is similar to that of the optical lens group 101, in particular, the optical centers of the lenses in the optical lens group 104 are all located on the same optical axis, and the first lens S41 has a surface R1 and a surface R2. The thickness of the optical center of the first lens S41 is d 1; the optical center of the surface R2 of the first lens S41 and the optical center of the surface R3 of the second lens S42 are spaced apart by a 1. Similarly, the definitions of d2-d9 and a2-a9 are similar to the definitions of d1 and a1, and reference may be made to the description of optical lens assembly 101, and further description is omitted here.

In the optical lens group 104 in the above table, the stop is located 0.580mm behind the vertex of the first face.

It is understood that in the optical lens assembly 104, the first surface of the second lens element 12d is the surface with the lens surface number R15, and the second surface is the surface with the lens surface number R17.

In the optical lens assembly 104, the surfaces from the serial number R1 to the serial number R15 are all lens surfaces, and the lens surfaces can converge or diverge incident light by using their own curved surface shapes, so as to realize imaging. The lens surfaces with serial numbers R1-R15 all participate in the imaging of the optical lens assembly 104.

In the optical lens assembly 104, the lens surface of the lens can be an aspheric surface, and the specific shape of the aspheric surface, i.e. the aspheric surface type, can be obtained by the aspheric surface formulas (1) and (2) in the foregoing embodiments.

The aspherical surface coefficients of the respective lenses in the aspherical surface formula are shown in table 15:

TABLE 15 aspherical surface coefficients of the respective lenses of the optical lens assembly 104

Therefore, the actual surface shape of each aspherical surface in the lens can be obtained according to the above table 15 and the surface shape formula of the aspherical surface.

In addition, in the optical lens group 104, when the object distance is infinite and 80mm, the corresponding element intervals (the distance between the optical center of the lens surface closest to the image side in the optical lens group and the photosensitive array 21 of the image sensor 2, similar to the optical lens group 101) are as shown in table 16.

TABLE 16 component spacing of the optical lens group 104

Object distance	∞	80mm
			Interval of constituent elements	0.859mm	1.236mm

Fig. 31a is a graph of axial chromatic aberration at an infinite object distance for the optical lens assembly shown in fig. 30. FIG. 31b is a graph of axial chromatic aberration of the optical lens assembly shown in FIG. 30 at an object distance of 80 mm. Fig. 31a and 31b specifically show the difference of the optical lens group when converging at different wavelengths. Where the ordinate in fig. 31a and 31b represents the aperture size and the abscissa represents the simulation result of the light focusing depth position at different wavelengths. The five curves in fig. 31a and 31b correspond to colors of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 31a and 31b, the axial aberration of the optical lens assembly is controlled within a small range.

Fig. 32a is a lateral chromatic aberration diagram of the optical lens assembly shown in fig. 30 at an infinite object distance. FIG. 32b is a lateral chromatic aberration plot of the optical lens assembly shown in FIG. 30 at an object distance of 80 mm. Fig. 32a and 32b specifically show coordinate positions at different wavelengths of light. In fig. 32a and 32b, the ordinate represents the image height, and the abscissa represents the XY coordinate position of light of different wavelengths. The five curves in fig. 32a and 32b correspond to colors of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 32a and 32b, the lateral chromatic aberration of the optical lens assembly is within the diffraction range.

Fig. 33a is a first graph of optical distortion at infinite object distance for the optical lens assembly shown in fig. 30. Fig. 33b is a graph illustrating the optical distortion curve of the optical lens assembly shown in fig. 30 at an infinite object distance. FIG. 33c is a first graph of optical distortion of the optical lens assembly of FIG. 30 at an object distance of 80 mm. FIG. 33d is a second graph of optical distortion of the optical lens assembly shown in FIG. 30 at an object distance of 80 mm. In fig. 33a to 33d, the abscissa represents the difference between the imaging deformation and the ideal imaging, and the ordinate represents the image height. Specifically, in fig. 33a and 33c, the abscissa measures millimeters, and in fig. 33b and 33d, the abscissa measures percentages. As can be seen from fig. 33a to 33d, the distortion of the image formed by the optical lens assembly is controlled within the range of visual recognition (below 2%, it is not recognizable by the naked eye).

The optical lens group of the present embodiment includes 7 first lenses and 1 second lens, and realizes optical imaging by converging or diverging light rays through each lens, and corrects imaging aberration, and under the combined action of each lens in the optical lens group, the optical lens group of the optical lens group has better control capability on imaging aberration, and has better optical imaging quality.

Optionally, referring to fig. 34, fig. 34 is a schematic structural view of a fifth optical lens group in the camera module according to the embodiment of the present application. As shown in fig. 34, in the

optical lens assembly

105, 8 lenses are sequentially disposed at intervals along the optical axis direction, wherein 8 first lenses 11 close to the object side are all fixed by the lens barrel, and the lens close to the image side is the second lens 12 e.

Specifically, in the optical lens assembly, the first lens element S51, the second lens element S52, the third lens element S53, the fourth lens element S54, the fifth lens element S55, the sixth lens element S56, the seventh lens element S57 and the second lens element 12e are arranged in order from the object side to the image side. The image side of the second lens element 12e is the photosensitive surface formed by the photosensitive array 21 of the image sensor 2. In the optical lens assembly 105 composed of the lenses, the first surface of the second lens 12e is aspheric, and the second surface is planar. At this time, when the camera module is focusing, the position of the second lens 12e relative to the image sensor 2 is fixed, and the other lenses move relative to the second lens 12e and the image sensor 2 to realize zooming and focusing.

The first lens S51 has positive optical power, and the ratio of the focal length f1 to the lens focal length f of the first lens S51 is: 0.797, | f1/f |;

the second lens S52 has negative power, the ratio of the focal length f2 to the lens focal length f of the second lens S52: 1.838, | f2/f |;

the third lens S53 has positive power, the ratio of the focal length f3 to the lens focal length f of the third lens S53: 158.35, | f3/f |;

the fourth lens S54 has negative power, the ratio of the focal length f4 to the lens focal length f of the fourth lens S54: 316.97, | f4/f |;

the fifth lens S55 has positive power, the ratio of the focal length f5 to the lens focal length f of the fifth lens S55: 1.436, | f5/f |;

the sixth lens S56 has positive power, the ratio of the focal length f6 to the lens focal length f of the sixth lens S56: 1.029, | f6/f |;

the seventh lens S57 has negative power, the ratio of the focal length f7 to the lens focal length f of the seventh lens S57: 0.9317, | f7/f |;

the second lens 12e has a negative focal power, and the ratio of the focal length fl of the second lens 12e to the focal length f of the lens is: fl/f |, 4.33.

The total focal length of the optical lens assembly 105 is the lens focal length f.

In the optical lens assembly 105 composed of the above lenses, when the distance dR between the second lens 12e and the image sensor 2 and the infinite object distance are equal, the ratio of the rear focal length BFL of the optical lens assembly 105, i.e., | dR/BFL |, is 0.05.

In the optical lens assembly 105, a ratio of the central thickness dl of the second lens element 12e to the total height TTL of the optical lens assembly 105, i.e., | dl/TTL | ═ 0.02; the contrast value | dlmax/dlmin | -3.167 between the maximum thickness dlmax of the second lens 12e and the minimum thickness dlmin of the second lens 12 e; the ratio between the total height and the effective focal length (TTL/EFL) of the optical lens group 105 is 1.129; the ratio (IH/EFL) between the image height and the effective focal length of the optical lens assembly 105 is 0.793.

Data of the optical lens group having the above-described structure are shown in tables 17 to 20. The optical parameters of the optical lens assembly 105 with the above structure when the object distance is infinite are shown in table 17.

TABLE 17 Main optical parameters of the optical lens group 105

When the object distance is infinity, the optical parameters of each lens in the optical lens assembly 105 are shown in table 18. The surface numbers in table 18 are those of the respective lenses shown in fig. 34.

TABLE 18 optical parameters of the lenses of the optical lens assembly 105

The definition of the thickness of the lens in table 18 is similar to that of the optical lens group 101, in particular, the optical centers of the lenses in the optical lens group 105 are all located on the same optical axis, and the first lens S51 has a surface R1 and a surface R2. The thickness of the optical center of the first lens S51 is d 1; the distance between the optical center of the surface R2 of the first lens S51 and the optical center of the surface R3 of the second lens S52 is a 1. Similarly, the definitions of d2-d9 and a2-a9 are similar to the definitions of d1 and a1, and reference may be made to the description of optical lens assembly 101, and further description is omitted here.

In the optical lens group 105 of the above table, the stop is located 0.580mm behind the vertex of the first face.

It is understood that in the optical lens assembly 105, the first surface of the second lens element 12e is the surface with the lens surface number R15, and the second surface is the surface with the lens surface number R17.

In the optical lens assembly 105, the surfaces from the serial number R1 to the serial number R15 are all lens surfaces, and the lens surfaces can converge or diverge incident light by using their own curved surface shapes, so as to realize imaging. Wherein, the lens surfaces with serial numbers R1-R15 all participate in the imaging of the optical lens assembly 105.

In the optical lens assembly 105, the lens surface of the lens may be an aspheric surface, and the specific shape of the aspheric surface, i.e. the aspheric surface type, can be obtained by the aspheric surface formulas (1) and (2) in the foregoing embodiments.

The aspherical surface coefficient of each lens in the aspherical surface formula is shown in table 19:

TABLE 19 aspherical surface coefficients of the respective lenses of the optical lens assembly 105

In addition, in the above optical lens group 105, when the object distance is infinite and 80mm, the corresponding element intervals (the distance between the optical center of the lens surface closest to the image side in the optical lens group and the photosensitive array 21 of the image sensor 2, similar to the optical lens group 101) are as shown in table 20.

TABLE 20 component spacing of the optical lens assembly 105

Object distance	∞	80mm
			Interval of constituent elements	0.308mm	0.770mm

Fig. 35a is a graph of axial chromatic aberration at infinite object distance for the optical lens assembly shown in fig. 34. FIG. 35b is a graph of axial chromatic aberration of the optical lens assembly shown in FIG. 34 at an object distance of 80 mm. Fig. 35a and 35b specifically show the difference of the optical lens group when they converge at different wavelengths. Where the ordinate in fig. 35a and 35b represents the aperture size and the abscissa represents the simulation results for the light focus depth position at different wavelengths. The five curves in fig. 35a and 35b correspond to colors of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 35a and 35b, the axial aberration of the optical lens assembly is controlled within a small range.

Fig. 36a is a lateral chromatic aberration diagram of the optical lens assembly shown in fig. 34 at an infinite object distance. FIG. 36b is a lateral chromatic aberration plot of the optical lens assembly of FIG. 34 at an object distance of 80 mm. Fig. 36a and 36b specifically show coordinate positions at different wavelengths of light. In fig. 36a and 36b, the ordinate represents the image height, and the abscissa represents the XY coordinate position of light of different wavelengths. The five curves in fig. 36a and 36b correspond to colors of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. As can be seen from fig. 36a and 36b, the lateral chromatic aberration of the optical lens assembly is within the diffraction range.

Fig. 37a is a first graph of optical distortion at infinite object distance for the optical lens assembly shown in fig. 34. Fig. 37b is a graph illustrating the optical distortion curve of the optical lens assembly shown in fig. 34 at an infinite object distance. Fig. 37c is a first graph of optical distortion of the optical lens assembly of fig. 34 at an object distance of 80 mm. FIG. 37d is a second graph of optical distortion of the optical lens assembly shown in FIG. 34 at an object distance of 80 mm. In fig. 37a to 37d, the abscissa represents the difference between the imaging deformation and the ideal imaging, and the ordinate represents the image height. Specifically, in fig. 37a and 37c, the abscissa measures in millimeters, and in fig. 37b and 37d, the abscissa measures in percentage. As can be seen from fig. 37a to 37d, the distortion of the image formed by the optical lens assembly is controlled within the range of visual recognition (below 2%, it is not recognizable by the naked eye).

The camera module comprises an optical lens group, an image sensor and a supporting component, wherein the supporting component fixes the optical lens group on the photosensitive side of the image sensor and comprises a first supporting component; the optical lens group comprises a first lens and a second lens, the first lens is fixed on the first supporting piece, the second lens is positioned outside the first supporting piece, and the second lens is used as a part of the optical lens group and participates in optical imaging; meanwhile, the second lens can also block infrared rays, but still allows visible light to penetrate through. Therefore, the first supporting piece of the camera module does not need to be provided with all lenses of the optical lens group, one part of the lenses can be arranged on the first supporting piece, and the other part of the lenses is fixed by utilizing other structures of the camera module. Because the fixed lens quantity of single structural department is less, and the lens is convenient for assemble, therefore can set up more lens quantity in the camera module, compare current camera module, its total lens quantity can increase, nevertheless the size of camera module itself does not increase, and the lens equipment is comparatively convenient, therefore can let the camera keep simple structure, compact, simultaneously, has higher optical shooting performance.

The application also provides an electronic device comprising the camera module in the embodiment. Specifically, the electronic device may further include a housing and a processor, the processor is accommodated in the housing, and the camera module may be disposed inside the housing of the electronic device. The electronic equipment can realize the shooting function through the camera module, the processor and the like.

The camera module is used for capturing still images or videos. The object generates an optical image through the optical lens group and projects the optical image to the image sensor. The image sensor may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The image sensor converts the optical signal into an electrical signal, and then transmits the electrical signal to the image signal processor to be converted into a digital image signal. The image signal processor outputs the digital image signal to the digital signal processor for processing. The digital signal processor converts the digital image signal into a desired image signal. In some embodiments, the electronic device may include 1 or N camera modules, N being a positive integer greater than 1. The specific structure, function and working principle of the camera module have been described in detail in the foregoing embodiments, and are not described herein again. The electronic device of the present application includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a personal digital assistant, a vehicle-mounted terminal, an intelligent home device, and the like.

Claims

1. A camera module is characterized by comprising an optical lens group, an image sensor and a supporting component, wherein the supporting component fixes the optical lens group on one side of the image sensor and comprises a first supporting component; the optical lens group comprises a plurality of first lenses and a plurality of second lenses, the first lenses can move along the axial direction of the camera module to change the focal length of the camera module, and the second lenses are used for filtering infrared light;

the first lens is fixed on the first supporting piece, the second lens is arranged between the first supporting piece and the image sensor, and the second lens is provided with a lens surface which is used for participating in imaging of the optical lens group.

2. The camera module of claim 1, wherein the second lens has a first surface facing an object side and a second surface facing an image side, and at least one of the first surface and the second surface is the lens surface.

3. The camera module of claim 2, wherein at least one of the first surface and the second surface is aspheric.

4. The camera module according to any one of claims 1-3, wherein the second lens element includes a light filtering portion and a lens portion, which are stacked along an axial direction of the optical lens assembly, the light filtering portion is configured to filter infrared light, and the light filtering portion covers the lens portion in a direction perpendicular to a circumferential direction of the optical lens assembly; the lens portion has the lens surface.

5. The camera module according to claim 4, wherein the optical filter is a layered structure, or/and the optical filter has a uniform thickness in a radial direction of the second lens.

6. The camera module according to claim 4 or 5, wherein the second lens is a lens formed by molding the optical filter portion and the lens portion.

7. The camera module according to any one of claims 4 to 6, wherein the lens portion is located on an image side or an object side of the optical filter portion.

8. The camera module according to any one of claims 4-6, wherein the second lens comprises two lens portions, and the two lens portions are respectively located on an image side of the optical filter portion and an object side of the optical filter portion.

9. The camera module according to any one of claims 1 to 8, wherein the first support member is a lens barrel, and the first lens is disposed inside the lens barrel.

10. The camera module according to claim 9, wherein the supporting assembly further comprises a second supporting member and a third supporting member sequentially arranged along an axial direction of the optical lens group; the third support piece and the image sensor are relatively fixed, the first support piece is arranged on the second support piece, and the second lens is arranged on the third support piece.

11. The camera module according to claim 10, further comprising a first driving motor disposed between the first support and the second support for moving the first lens relative to the second support.

12. The camera module of any one of claims 1-9, wherein the second lens is disposed on the image sensor.

13. An electronic device comprising a housing and the camera module of claim 1, the camera module being disposed inside the housing.

14. The electronic device of claim 13, wherein the second lens has a first surface facing an object side and a second surface facing an image side, at least one of the first surface and the second surface being the lens surface.

15. The electronic device of claim 14, wherein at least one of the first surface and the second surface is aspheric.

16. The electronic device according to any one of claims 13-15, wherein the second lens comprises a filter portion and a lens portion stacked along an axial direction of the optical lens assembly, the filter portion is configured to filter infrared light, and the filter portion covers the lens portion in a direction perpendicular to a circumferential direction of the optical lens assembly; the lens portion has the lens surface.

17. The electronic device according to claim 16, wherein the second lens is a lens in which the optical filter portion and the lens portion are molded.

18. The electronic apparatus according to claim 16 or 17, wherein the lens portion is located on an image side or an object side of the optical filter portion.

19. The electronic device according to claim 16 or 17, wherein the second lens includes two lens portions, and the two lens portions are respectively located on an image side of the optical filter portion and an object side of the optical filter portion.

20. The electronic device according to any one of claims 13-19, wherein the support assembly further comprises a second support member and a third support member disposed in sequence along an axial direction of the optical lens group; the third support piece and the image sensor are relatively fixed, the first support piece is arranged on the second support piece, and the second lens is arranged on the third support piece.