Lens assembly, camera module, and electronic device

Abstract

A lens assembly (10), a camera module (110), and an electronic device (100), relating to the technical field of cameras. The lens assembly (10) may comprise a first lens unit (101) and a second lens unit (102) arranged along an optical axis from an object side to an image side, and the second lens unit (102) can move towards the image side along the optical axis, so as to achieve the switching of the lens assembly (10) between an infinity state and a macro state, thus allowing the lens assembly (10) to achieve both telephoto and macro functions. Moreover, by reasonably allocating the focal power of the first lens unit (101) and the focal power of the second lens unit (102) and the focal power of a first lens (11) closest to the object side, a light inlet amount is increased, so that the lens assembly has a large aperture characteristic, achieving a long-focus telephoto function and a macro function of high definition and high magnification, and ensuring high-quality imaging for a long-distance photography scene and high-definition imaging for a close-up photography scene.

Description

Lens assemblies, camera modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 31, 2023, with application number 202311129967.5 and application name “Lens assembly, camera module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of camera technology, and in particular to a lens assembly, a camera module and an electronic device. Background Art

[0003] In recent years, with the development of camera technology, camera modules have become an indispensable functional component in electronic products such as mobile phones, tablets, laptops and wearable devices. As electronic devices become more multifunctional, their shooting effects and requirements are increasingly comparable to those of SLR cameras. The functional effects of camera modules have gradually become one of the important characteristics of electronic devices.

[0004] At present, camera modules usually include a lens assembly and an image sensor. The lens assembly is usually formed by a plurality of lens elements arranged in sequence along the optical axis. After passing through the lens assembly, the light is projected onto the image sensor for photoelectric conversion and then used for imaging. Therefore, the performance of the lens assembly directly determines the imaging performance of the camera module. Among them, the large aperture design is conducive to the camera's night scene shooting, snapshot, video and background blur functions. Moreover, in different shooting scenes, such as dark or night shooting environments, when shooting distant objects, the lens assembly needs a large aperture to achieve more light intake, thereby having a better shooting effect and meeting the shooting requirements of distant infinite scenes. For close-up shooting scenes, such as shooting close-up objects such as flowers, dolls, and insects, a large aperture lens assembly has better clarity and can achieve the shooting effect of details of such objects in close-up macro scenes.

[0005] Therefore, there is an urgent need for a large aperture lens assembly that can meet the high-quality shooting requirements of long-range shooting scenes and can also achieve high-resolution macro shooting functions.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a lens assembly, a camera module and an electronic device. The lens assembly can realize a large aperture design and a telephoto shooting function to meet the high-quality imaging requirements of long-range shooting scenes. It can also realize a macro shooting function with high magnification and resolution to meet the high-definition imaging requirements of close-range shooting scenes.

[0008] In the first aspect of the embodiments of the present application, a lens assembly is provided, which at least includes a first lens unit and a second lens unit arranged in sequence along the optical axis from the object side to the image side. The first lens unit and the second lens unit respectively include lenses with optical powers. The first lens unit has a positive optical power, and the second lens unit has a negative optical power. By adopting the architecture of two lens units and reasonably distributing the optical powers of the first lens unit and the second lens unit, it is beneficial to achieve a large aperture design of the lens assembly.

[0009] The second lens unit is movably arranged along the optical axis. The second lens unit moves along the optical axis towards the image side to switch the lens assembly from the infinite far state to the macro state, enabling the lens assembly to have a telephoto shooting function and a macro shooting function. Moreover, the large aperture design of the lens assembly can meet the requirements of the lens assembly in the long-distance shooting scene, realize the telephoto function of the lens assembly, ensure high-quality imaging in the long-distance shooting scene, and also improve the resolution of the lens assembly in the close-range shooting scene, which is beneficial to realizing the macro function with high magnification and resolution and ensuring high-definition imaging in the close-range shooting scene.

[0010] The lens of the first lens unit at least includes a first lens. The first lens is located on the side of the first lens unit adjacent to the object side. The first lens satisfies the conditional formula: |(R11 + R12) / f1|>2.3, where R11 is the curvature radius of the object side surface of the first lens, R12 is the curvature radius of the image side surface of the first lens, and f1 is the focal length of the first lens. As the lens with optical power closest to the object side in the first lens unit and the second lens unit, when light enters the first lens unit and the second lens unit, it first passes through the first lens. Combining the above two-lens-unit architecture, by making the first lens unit satisfy the above conditional formula, the optical power of the first lens can be more reasonably distributed, which is beneficial to enhancing the refractive ability of the first lens, increasing the light input of the lens assembly, and realizing the large aperture design of the lens assembly.

[0011] The lens assembly satisfies the conditional formula: 0.75 < f1 / EFL1 < 1, where EFL1 is the focal length of the lens assembly in the infinite far state. When the lens assembly has a telephoto characteristic in the long-distance shooting scene, it is ensured that the first lens has a stronger refractive ability, and the optical power of the first lens is more reasonably distributed, which is further beneficial to increasing the aperture design of the lens assembly.

[0012] In a possible implementation manner, the aperture number F#1 of the lens assembly in the infinite far state satisfies the conditional formula: 1.0 < F#1 < 2.5. The aperture value of the lens assembly is small, having the characteristic of a large aperture, ensuring that the lens assembly has a high light input, enabling better realization of the telephoto function, and ensuring high-quality imaging in the long-distance shooting scene.

[0013] In a possible implementation, when the lens assembly is in the macro state, the aperture number F#2 satisfies the conditional formula: 1.0 < F#2 < 3. The aperture value is very small and is close to the aperture value in the infinity state, significantly improving the resolution of the lens assembly, enabling better implementation of the macro function, and achieving high-definition imaging in the close-up shooting scenario.

[0014] In a possible implementation, when the lens assembly is in the macro state, the magnification Mag satisfies the conditional formula: 0.15x < Mag < 0.5x. The lens assembly has a high magnification, can better meet the requirements of the close-up macro shooting scenario, and further improves the imaging quality and effect of the lens assembly in the close-up shooting scenario.

[0015] In a possible implementation, the lens assembly also satisfies the conditional formula: 0.1 < |G1 / EFL1| < 0.9, where G1 is the focal length of the first lens unit. The optical power of the first lens unit is reasonably distributed, enabling the first lens unit to have a large refractive power, which is beneficial to increasing the aperture of the lens assembly and achieving high-quality imaging of the lens assembly in the long-distance shooting scenario.

[0016] In a possible implementation, the lens assembly also satisfies the conditional formula: 0.1 < |G2 / EFL1| < 0.9, where G2 is the focal length of the second lens unit. The optical power of the second lens unit is reasonably distributed, enabling the second lens unit to also have a large refractive power, which is also beneficial to increasing the aperture of the lens assembly and achieving high-quality imaging of the lens assembly in the long-distance shooting scenario.

[0017] In a possible implementation, the lens assembly also satisfies the conditional formula: 0.15 < |EFL2 / TTL| < 0.95, where TTL is the total optical length of the lens assembly and EFL2 is the focal length of the lens assembly in the macro state. When the lens assembly is in the macro state, it has a small focal length, which also makes the total optical length TTL of the lens assembly small. The lens assembly can achieve a small volume design, which is beneficial to meeting the thinning design requirements of the camera module and electronic devices.

[0018] In a possible implementation, the lens assembly also satisfies the conditional formula: 1.1 < EFL1 / EFL2 < 3.2, where EFL2 is the focal length of the lens assembly in the macro state. Under the condition that the lens assembly has better telephoto characteristics in the long-distance shooting scenario, it can ensure that the lens assembly has a larger magnification in the macro state, which is beneficial to achieving high-quality imaging in the long-distance shooting scenario and the high-magnification close-up macro shooting effect.

[0019] In a possible implementation, the refractive index Nd1 of the first lens satisfies the conditional formula: 1.4 < Nd1 < 1.85. The first lens has a relatively low refractive index, which can effectively improve the image quality of imaging and is beneficial to increasing the aperture of the lens module, thereby enhancing the imaging quality.

[0020] In a possible implementation, the molding material of the first lens is glass or plastic. Both have relatively low costs, which are beneficial to reducing the cost of the lens module, and have high design flexibility, facilitating promotion and production realization.

[0021] In a possible implementation, the shape of the lens at least includes one or more combinations of circular, oval, racetrack-shaped, and square. This is beneficial to enhancing the design flexibility of the lens. Among them, lenses such as racetrack-shaped or square lenses can be formed by cutting circular or oval lenses, which is beneficial to reducing the size of the lens, decreasing the occupied space of the lens, and realizing the small size and thinning design of the lens module.

[0022] In a possible implementation, the first lens unit includes a first lens, a second lens, and a third lens arranged in sequence along the optical axis from the object side to the image side. The first lens has a positive optical power, the second lens has a negative optical power, and the third lens has a positive optical power. The second lens unit includes a fourth lens, a fifth lens, and a sixth lens arranged in sequence along the optical axis from the object side to the image side. The fourth lens has a negative optical power, the fifth lens has a positive optical power, and the sixth lens has a negative optical power. By adopting a structure with three lenses as one lens unit, the formed lens module is relatively simple, has a small volume and a low cost, and by reasonably distributing the optical power of each lens, it is beneficial to further increase the aperture of the lens module and realize the large aperture design of the lens module.

[0023] The second aspect of the embodiments of the present application provides a camera module, which at least includes an image sensor and any one of the above lens modules, and the image sensor is located on the side of the lens module facing the image side.

[0024] By including the lens module, which has the characteristics of a large aperture, the lens module also has a telephoto function and a macro function, can achieve high-quality imaging in long-distance shooting scenarios, and can also achieve high resolution and magnification in close-up shooting scenarios, enriching the shooting functions of the camera module and ensuring high-quality imaging of the camera module in long-distance and close-up shooting scenarios. In addition, the lens module has a small volume and cost, which is beneficial to realizing the thinning design of the camera module.

[0025] The third aspect of the embodiments of the present application provides an electronic device, which at least includes a housing and the above camera module, and the camera module is disposed on the housing.

[0026] By including a camera module, the camera module can meet the imaging requirements of long-range shooting and close-up shooting, achieve high-quality imaging in long-range and close-up shooting scenarios, help improve the performance of electronic devices, and also meet the thinning design requirements of electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0028] FIG2 is a schematic structural diagram of a camera module provided by an embodiment of the present application when a lens assembly is in an infinite distance state;

[0029] FIG3 is a structural diagram of a lens assembly in a camera module in a macro state provided by an embodiment of the present application;

[0030] FIG4 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 1 of the present application when the lens assembly is in an infinite distance state;

[0031] FIG5 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 1 of the present application when the lens assembly is in a macro state;

[0032] FIG6 a is a modulation transfer function curve diagram of a lens assembly provided in Example 1 of the present application when the lens assembly is in an infinite distance state;

[0033] FIG6 b is a modulation transfer function curve diagram of a lens assembly provided in the first embodiment of the present application when in a macro state;

[0034] FIG7 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 2 of the present application when the lens assembly is in an infinite distance state;

[0035] FIG8 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in a second embodiment of the present application when the lens assembly is in a macro state;

[0036] FIG9a is a modulation transfer function curve diagram of a lens assembly provided in Example 2 of the present application when the lens assembly is at infinity;

[0037] FIG9 b is a modulation transfer function curve diagram of a lens assembly provided in Example 2 of the present application when in a macro state;

[0038] FIG10 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 3 of the present application when the lens assembly is in an infinite distance state;

[0039] FIG11 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in Example 3 of the present application when the lens assembly is in a macro state;

[0040] FIG12a is a modulation transfer function curve diagram of a lens assembly provided in Example 3 of the present application when it is in an infinite distance state;

[0041] FIG12 b is a modulation transfer function curve diagram of a lens assembly provided in Example 3 of the present application when in a macro state;

[0042] FIG13 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided by a fourth embodiment of the present application when the lens assembly is in an infinite distance state;

[0043] FIG14 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided by a fourth embodiment of the present application when the lens assembly is in a macro state;

[0044] FIG15a is a modulation transfer function curve diagram of a lens assembly provided in Example 4 of the present application when it is at infinity;

[0045] FIG15 b is a modulation transfer function curve diagram of a lens assembly provided in the fourth embodiment of the present application when in a macro state;

[0046] FIG16 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 5 of the present application when the lens assembly is in an infinite distance state;

[0047] FIG17 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in a fifth embodiment of the present application when the lens assembly is in a macro state;

[0048] FIG18 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided by Example 6 of the present application when the lens assembly is in an infinite distance state;

[0049] FIG19 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in Example 6 of the present application when the lens assembly is in a macro state;

[0050] FIG20 is a modulation transfer function curve diagram of a lens assembly provided in Example 6 of the present application when it is in an infinite distance state;

[0051] FIG21 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 7 of the present application when the lens assembly is in an infinite distance state;

[0052] FIG22 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in Example 7 of the present application when the lens assembly is in a macro state;

[0053] FIG23 is a modulation transfer function curve diagram of a lens assembly provided in Example 7 of the present application when it is at infinity;

[0054] FIG24 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided by Example 8 of the present application when the lens assembly is in an infinite distance state;

[0055] FIG25 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in Example 8 of the present application when the lens assembly is in a macro state;

[0056] FIG26 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided by Example 9 of the present application when the lens assembly is in an infinite distance state;

[0057] FIG27 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided by Example 9 of the present application when the lens assembly is in a macro state;

[0058] FIG28 is a modulation transfer function curve diagram of a lens assembly provided in Example 9 of the present application when it is in an infinite distance state;

[0059] FIG29 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided by the tenth embodiment of the present application when the lens assembly is in an infinite distance state;

[0060] FIG30 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided by the tenth embodiment of the present application when the lens assembly is in a macro state;

[0061] FIG31 is a modulation transfer function curve diagram of a lens assembly provided in Example 10 of the present application when it is at infinity;

[0062] FIG32 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 11 of the present application when the lens assembly is in an infinite distance state;

[0063] FIG33 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in the eleventh embodiment of the present application when the lens assembly is in a macro state;

[0064] FIG34 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 12 of the present application when the lens assembly is in an infinite distance state;

[0065] Figure 35 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 12 of the present application when it is in a macro state.

[0066] Explanation of the accompanying reference numerals: 100 - electronic device; 110 - camera module; 10 - lens assembly; 101 - first lens unit; 11 - first lens; 12 - second lens; 13 - third lens; 102 - second lens unit; 14 - fourth lens; 15 - fifth lens; 16 - sixth lens; 103 - aperture; 20 - image sensor; 30 - filter; 120 - housing; 130 - speaker hole; 140 - data interface. DETAILED DESCRIPTION

[0067] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0068] To facilitate understanding, the relevant technical terms involved in the embodiments of this application are first explained and illustrated.

[0069] The object side, with the lens assembly as the boundary, the side where the object is located is the object side, and the side of the lens or optical element facing the object side is the object side surface.

[0070] The image side, with the lens assembly as the boundary, is the side where the image of the object is located, and the side of the lens or optical element facing the image side is the image side.

[0071] The optical axis refers to the light passing through the center of each lens element of the lens assembly (refer to the imaginary axis L in Figure 2).

[0072] The imaging plane is located on the image side of all the lenses in the lens assembly and is the carrier surface on which the image is formed after the light passes through each lens in the lens assembly in sequence. In the embodiment of the present application, the imaging plane may refer to the photosensitive surface of the image sensor.

[0073] Half of image height (abbreviated as IMH in the embodiments of the present application) refers to half of the full image height of the image formed by the lens assembly, which is the maximum radius of the imaging circle.

[0074] The optical power is equal to the difference between the convergence of the image side light beam and the convergence of the object side light beam, which represents the refractive ability of the lens to the incident parallel light beam.

[0075] Positive optical power means that the lens has a positive focal length and has the effect of converging light.

[0076] Negative optical power means that the lens has a negative focal length and has the effect of diverging light.

[0077] The Abbe number, also known as the dispersion coefficient, refers to the difference ratio of the refractive index of an optical material at different wavelengths, indicating the degree of dispersion of the material.

[0078] Refractive index is the ratio of the speed of light in a vacuum (air) to the speed of light in the lens material. The higher the refractive index of a lens, the greater its ability to refract incident light. The higher the refractive index, the thinner the lens. That is, for lenses with the same center thickness, the same prescription, and the same material, a lens with a higher refractive index will be thinner at the edges than a lens with a lower refractive index.

[0079] The radius of curvature is the reciprocal of the curvature. The curvature of a plane curve is the rate of rotation of the tangent direction angle at a point on the curve to the arc length. It is defined by differentiation and indicates the degree to which the curve deviates from a straight line.

[0080] Focal length, also known as focal length, is often expressed as effective focal length (EFL), distinguishing it from parameters such as front focal length and back focal length. Focal length, or effective focal length, is a measure of light convergence or divergence in an optical system. It refers to the vertical distance from the optical center of a lens or lens assembly to the focal plane, when a sharp image of an object at infinite distance is formed through the lens or lens assembly. From a practical perspective, it can be understood as the distance from the center of the lens assembly to the imaging plane.

[0081] Infinity refers to the state where, when the object distance exceeds a certain value, the subject can be perceived as being captured by the lens assembly as a parallel beam from a point of light at infinity. When the lens assembly is in the infinity state (∞), the lens assembly focuses on "∞" and produces a clear image of objects at infinity.

[0082] Macro photography is achieved at a very close distance with a high magnification, allowing for images that are as large as or smaller than the actual object. In macro mode, the lens assembly has a magnification of 1x or higher, allowing for close-up photography. The focal length of the lens assembly in macro mode can be smaller than that of the lens assembly in infinity mode, resulting in higher resolution and clearer images.

[0083] The aperture is a device used to control the amount of light that passes through the lens or lens group and enters the photosensitive surface of the camera module. It is usually fixed inside the camera module. The aperture size can be expressed by the F# value.

[0084] The aperture number F# is a relative value (the inverse of the relative aperture) obtained by dividing the focal length of the lens assembly by the diameter of the lens assembly (entrance pupil diameter). The smaller the F# value, the more light enters in the same unit time, the smaller the depth of field, and the background content of the photo will be blurred, producing an effect similar to that of a telephoto lens.

[0085] The amount of light entering refers to how much light passes through the lens or lens group (also known as the lens assembly) and illuminates the photosensitive surface.

[0086] The target surface refers to the photosensitive surface of the image sensor. The larger the target surface, the greater the sensitivity of the image sensor and the greater the image height.

[0087] Total track length (TTL), also known as total height or total length, refers to the total length along the optical axis from the object side of the lens element closest to the object side to the imaging plane. It is a major factor in determining the height of the camera module. In this application, as shown in Figure 2, the total track length (TTL) can be the length along the optical axis from the object side of the lens element closest to the object side (such as first lens element 11) to the photosensitive surface of the image sensor.

[0088] Modulation transfer function (MTF) is an evaluation measure of system imaging quality.

[0089] An embodiment of the present application provides an electronic device, which may include but is not limited to a mobile phone, a tablet personal computer, a laptop computer, a camera, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a POS machine, a personal digital assistant (PDA), a wearable device, a virtual reality (VR) device (such as VR glasses, VR helmets, etc.), an augmented reality (AR) device (such as AR glasses, AR helmets, etc.), an in-vehicle device, a surveillance camera device, and other electronic devices that can implement a shooting function.

[0090] In the embodiment of the present application, the electronic device is taken as an example of a mobile phone. The mobile phone may be a bar phone, or the mobile phone may be a folding phone. Specifically, the following description will be made by taking the electronic device as a bar phone as an example.

[0091] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

[0092] As shown in Figure 1, the electronic device 100 may include a shell 120 and a camera module 110, wherein the shell 120 can serve as the main load-bearing structural component of the electronic device 100, and the camera module 110 can be arranged on the shell 120. Exemplarily, the shell 120 may have a accommodating cavity (not shown in the figure), and the camera module 110 can be assembled on the shell 120, and at least part of it can be located in the accommodating cavity of the shell 120.

[0093] The camera module 110 is used to realize the shooting function, for example, it can be used to take photos and record images, etc. Its shooting scenes can include various complex and diverse shooting application scenes, such as indoor, outdoor, people, environment and other different scenes.

[0094] The electronic device 100 may further include a display screen (not shown in the figure), which may be fixed to one side of the housing 120 , and the plane on the side where the display screen is located may serve as the display surface of the electronic device 100 to display images and the like.

[0095] In the embodiment of the present application, the side of the electronic device 100 where the display surface is located is referred to as the front side of the electronic device 100, and the side opposite to the front side is referred to as the back side of the electronic device 100. The camera module 110 may be a front-facing camera lens, and the light inlet of the camera module 110 may be located on the front side of the electronic device 100 for taking selfies or photographing other objects.

[0096] Alternatively, the camera module 110 may also be a rear camera lens, as shown in FIG1 . The light inlet of the camera module 110 may be located on the back of the electronic device 100 for photographing other objects, and of course, for taking selfies.

[0097] The number of camera modules 110 included in the electronic device 100 may be one, or the number of camera modules 110 may be multiple, so as to meet different shooting requirements.

[0098] The electronic device 100 may further include other structural components. For example, as shown in FIG1 , the electronic device 100 may further include a speaker hole 130 . The speaker hole 130 may be provided on the housing 120 . The speaker 130 may be used to play audio, etc., of the electronic device 100 . A sound emitter (not shown) may also be provided within the housing cavity of the housing 120 . The sound emitter may be used to generate sound and may be in communication with the speaker hole 130 so that the sound can be transmitted through the speaker hole 130 .

[0099] The electronic device 100 may also have a data interface 140, which may be opened on the shell 120. A control circuit board (not shown in the figure) may also be provided in the accommodating cavity of the shell 120. The control circuit board may be connected to the data interface 140. The data interface 140 may be used to power the electronic device 100, or the data interface 140 may also be used to connect the electronic device 100 with headphones, external multimedia devices, etc. (such as external cameras, external projection devices, etc.).

[0100] It should be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown, or may combine or separate certain components, or may have different component arrangements. For example, the electronic device 100 may also include sensors, processors, drive structures, flashlights, and other devices.

[0101] A camera module typically includes a lens assembly and an image sensor. Light can enter the camera module through the lens assembly. Specifically, light reflected by the object being photographed can pass through the lens assembly, which is used to form an optical image (light signal) of the object. The lens assembly can adjust and control the light path to form an optical image, and then illuminate this optical image to the image sensor. The image sensor can perform photoelectric conversion, receiving the optical image and converting it into an electrical signal for imaging display.

[0102] Therefore, the optical performance of the lens assembly significantly impacts the image quality and performance of the camera module. With the increasing demand for photography on mobile phones and other devices, the requirements for lens aperture and applicable shooting scenarios are also increasing. A large aperture design can increase the amount of light entering the lens assembly, facilitating night scene shooting, background blur, and snapshots. Furthermore, in dark or night shooting conditions, when capturing distant objects, the increased light intake of a large aperture can produce better images. For close-up scenes, such as those of flowers, dolls, and insects, a large aperture lens assembly provides better clarity and resolution, ensuring clear imaging of detailed details.

[0103] Based on this, the embodiments of the present application provide a lens assembly that utilizes a two-lens unit architecture and enables the image-side lens unit to be movable, thereby enabling the lens assembly to switch between infinity and macro modes, thus enabling both telephoto and macro photography. Furthermore, through the rational allocation of lens units and the optical power of the lenses, the lens assembly achieves characteristics such as a large aperture, a small size, a low cost, and a high resolution, thus meeting the high-quality imaging requirements for long-range photography, while also achieving a high-magnification and high-resolution macro function, thus meeting the high-definition imaging requirements for close-range photography.

[0104] The lens assembly provided in the embodiments of the present application and the camera module including the lens assembly are described in detail below with reference to the accompanying drawings.

[0105] FIG2 is a schematic structural diagram of a lens assembly in a camera module provided by an embodiment of the present application when the lens assembly is in an infinite distance state.

[0106] As shown in Figure 2, the camera module 110 may include a lens assembly 10 and an image sensor 20, wherein the image sensor 20 may be located on the side of the lens assembly 10 facing the image side, that is, the lens assembly 10 may be located between the object to be photographed and the image sensor 20, and the photosensitive surface (also referred to as the imaging surface) of the image sensor 20 may face the lens assembly 10.

[0107] The light reflected by the object enters the camera module 110, forms an image after passing through the lens assembly 10 and is irradiated onto the photosensitive surface of the image sensor 20. The photosensitive surface of the image sensor 20 receives the optical image and converts it into an image electrical signal output, thereby realizing the camera module 110's functions such as taking pictures or videos.

[0108] To ensure the photosensitivity of the image sensor 20, the image sensor 20 can be located in a housing inside the electronic device housing, and the lens assembly 10 can be located on the side of the image sensor 20 facing the display screen, or the lens assembly 10 can also be located on the side of the image sensor 20 facing away from the display screen.

[0109] The image sensor 20 may be a charge-coupled device (CCD), or a complementary metal oxide semiconductor (CMOS), or other devices capable of performing photoelectric conversion.

[0110] Continuing with FIG2 , the camera module 110 may further include a filter 30, which may be located between the lens assembly 10 and the image sensor 20. Taking the dotted line L in FIG2 as the optical axis, the lens assembly 10, the filter 30, and the image sensor 20 are arranged in sequence along the direction of the optical axis L from the object side to the image side. The light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in sequence and then irradiates the photosensitive surface of the image sensor 20.

[0111] The filter 30 has a filtering effect, which can allow light within a specific wavelength range to pass through, thereby filtering out stray light that is not conducive to imaging, which is beneficial to improving imaging quality.

[0112] The camera module 110 may also include an image processor, a memory, etc. (not shown in the figure). The image sensor 20 may transmit the converted electrical signal to the image processor, the memory, etc. for processing and then transmit it to the electronic device 100, thereby realizing the display of the image of the photographed object through the display screen of the electronic device 100.

[0113] Of course, in some other examples, the camera module 110 may also include other structural components, such as a detection sensor, a driving structure, and a circuit board.

[0114] 2 , the lens assembly 10 may include at least a first lens unit 101 and a second lens unit 102 arranged in sequence from the object side to the image side along the optical axis L. The first lens unit 101 may be composed of lenses having optical power, and the second lens unit 102 may also be composed of lenses having optical power.

[0115] The lens assembly 10 may further include a lens barrel (not shown), which may serve as the primary structural member of the lens assembly 10. The first lens unit 101 and the second lens unit 102 may be disposed within the lens barrel, and the optical axis of the lens assembly 10 may coincide with the central axis of the lens barrel. Light apertures may be provided at opposite ends of the lens barrel along the optical axis to allow light to enter the lens barrel and pass through the lens assembly 10, and also to allow light that has passed through the lens assembly 10 to exit and illuminate the image sensor 20.

[0116] The lens assembly 10 may further include an aperture 103, which may be located on the side of the first lens unit 101 facing the object side. That is, compared with the first lens unit 101 and the second lens unit 102, the aperture 103 may be arranged closer to the object side. The aperture 103 may be fixed within the lens barrel. For example, the aperture 103 may be fixed to the lens (such as the first lens 11) in the first lens unit 101 that is arranged closest to the object side.

[0117] Of course, in some other examples, aperture 103 can also be fixed outside the lens barrel. Light can first pass through aperture 103, then pass through first lens unit 101 and second lens unit 102 in sequence before exiting. Aperture 103 can limit the light entering lens assembly 10, thereby adjusting the light intensity and controlling the amount of light entering lens assembly 10.

[0118] The first lens unit 101 may include multiple lenses, which may be arranged in sequence from the object side to the image side along the optical axis. The centers of the multiple lenses may overlap and be located on the optical axis.

[0119] For example, as shown in Figure 2, the first lens unit 101 may include three lenses with optical focal length, such as a first lens 11, a second lens 12 and a third lens 13. The first lens 11, the second lens 12 and the third lens 13 are arranged in sequence from the object side to the image side along the optical axis L, that is, the first lens 11 is the lens with optical focal length that is closest to the object side in the first lens unit 101. The first lens 11 may also be the lens with optical focal length that is closest to the object side in the first lens unit 101 and the second lens unit 102.

[0120] Of course, in some examples, the number of lenses in the first lens unit 101 may also be one, for example, the first lens unit 101 may only include the first lens 11 .

[0121] Correspondingly, the second lens unit 102 may also include multiple lenses, which are arranged in sequence from the object side to the image side along the optical axis, and the centers of the multiple lenses may overlap and be located on the optical axis.

[0122] For example, referring to FIG2 , the second lens unit 102 may also include three lenses with optical power, such as a fourth lens 14 , a fifth lens 15 , and a sixth lens 16 . The fourth lens 14 , the fifth lens 15 , and the sixth lens 16 are arranged in sequence from the object side to the image side along the optical axis L. That is, the sixth lens 16 may be the lens with optical power that is closest to the image side in the second lens unit 102 , and the sixth lens 16 may also be the lens with optical power that is closest to the image side in the first lens unit 101 and the second lens unit 102 .

[0123] Of course, in some examples, the number of lenses in the second lens unit 102 may also be one, for example, the second lens unit 102 may only include the sixth lens 16 .

[0124] In the embodiment of the present application, a first lens unit 101 includes three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13, and a second lens unit 102 includes three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. The lens assembly 10 formed by using three lenses as one lens unit, with a total of two lens units, is relatively simple, has a smaller size, and is relatively low in cost. This makes it easier to meet the requirements of thinning camera modules and electronic devices, and is easier to produce and promote, thereby improving the yield rate of lens assemblies.

[0125] Among them, the first lens unit 101 can have positive optical focal length, and the second lens unit 102 can have negative optical focal length. Reasonable distribution of the optical focal lengths of the first lens unit 101 and the second lens unit 102 is conducive to achieving a large aperture design of the lens assembly 10.

[0126] It should be noted that when the first lens unit 101 includes multiple lenses, all of the multiple lenses can have positive optical power, or some of the multiple lenses can have positive optical power and some of the lenses can have negative optical power, so that the first lens unit 101 after the multiple lenses are combined has positive optical power.

[0127] For example, the first lens 11 and the third lens 13 in the first lens unit 101 can respectively have positive optical power, and the second lens 12 can have negative optical power, which is conducive to better distribution of the optical power of each lens in the first lens unit 101 and to achieve a large aperture design of the lens assembly 10.

[0128] Accordingly, when the second lens unit 102 includes multiple lenses, all of the multiple lenses may have negative optical power, or some of the multiple lenses may have negative optical power and some of the lenses may have positive optical power, so that the second lens unit 102 after the multiple lenses are combined has negative optical power.

[0129] For example, the fourth lens 14 and the sixth lens 16 of the second lens unit 102 can have negative optical power respectively, and the fifth lens 15 can have positive optical power, which is conducive to better distribution of the optical power of each lens in the second lens unit 102, thereby achieving a large aperture design.

[0130] Among them, the curvature radius of the object side of the first lens 11 is R11, the curvature radius of the image side of the first lens 11 is R12, and the focal length of the first lens 11 is f1. The first lens 11 can satisfy the conditional expression |(R11+R12) / f1|>2.3. The first lens 11 is the lens with optical focal length closest to the object side in the first lens unit 101 and the second lens unit 102. When light enters the first lens unit 101 and the second lens unit 102, it first passes through the first lens 11. Combined with the above-mentioned two lens unit structures, the first lens unit 101 satisfies the conditional expression, which can more reasonably distribute the optical focal length of the first lens 11, which is conducive to improving the refractive power of the first lens 11, increasing the amount of light entering the lens assembly 10, and realizing a large aperture design of the lens assembly 10.

[0131] To meet the needs of both long-range and close-up photography scenarios, in this embodiment of the present application, the second lens unit 102 can be arranged in a movable manner, while the first lens unit 101 can be fixed and immovable. The movement of the second lens unit 102 enables the lens assembly 10 to switch between the infinity state and the macro state, thereby achieving telephoto and macro functions. Specifically, the second lens unit 102 can be arranged to be movable along the optical axis L. That is, all lenses of the second lens unit 102 can be moved along the optical axis L toward or away from the image side.

[0132] For example, when the lens assembly 10 is in the infinity state, the lens assembly 10 has a telephoto function, and the lens assembly 10 can be used to capture distant scenes, especially in dark or nighttime environments, such as landscapes, night scenes, starry skies, the Milky Way, the Aurora, and other shooting scenes. As shown in FIG2 , the second lens unit 102 of the lens assembly 10 is positioned closer to the first lens unit 101 and farther away from the image sensor 20 and the filter 30. The large aperture design of the lens assembly 10 can increase the amount of light entering, improving the image quality and effect. Furthermore, the lens assembly 10 can have a longer focal length, realizing the telephoto characteristics of the lens assembly 10, meeting the requirements of long-range shooting scenes and ensuring high-quality imaging effects in such scenes.

[0133] Among them, when the lens assembly 10 is in the infinite far state, the focal length is EFL1. The ratio range of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 can be 0.75 < f1 / EFL1 < 1. When the lens assembly 10 has a telephoto characteristic in the long-distance shooting scenario, it is ensured that the first lens 11 has a stronger refractive ability, and the optical power of the first lens 11 is more reasonably distributed, which further facilitates increasing the aperture design of the lens assembly 10 and improving the imaging quality and effect of telephoto shooting.

[0134] FIG. 3 is a schematic structural diagram of a lens assembly in a macro state provided by an embodiment of the present application in a camera module.

[0135] When the lens assembly 10 switches to the macro state, as shown in FIGS. 2 and 3, the second lens unit 102 can move along the optical axis L toward the image side, that is, when moving away from the first lens unit 101, the distance between the second lens unit 102 and the first lens unit 101 on the optical axis L is increased, the focal length of the entire lens assembly 10 is reduced, the magnification of the lens assembly 10 is increased, so that the lens assembly 10 can realize the macro function and realize the switch of the lens assembly 10 from the infinite far state to the macro state.

[0136] When the lens assembly 10 is in the macro state, the lens assembly 10 can be used to shoot nearby scenes, such as in the shooting scenarios of small objects such as flowers, flying birds, insects and fish. As shown in FIG. 3, the second lens unit 102 in the lens assembly 10 is arranged closer to the image sensor 20 and the filter 30 and farther away from the first lens unit 101. The large aperture design of the lens assembly 10 can effectively increase the light input amount in the macro state, improve the resolution of the lens assembly 10, facilitate the realization of the macro shooting function with high magnification and resolution, enable the image taken in the macro state to better display details, enrich the imaging effect, and ensure high-definition imaging in the near-distance shooting scenario.

[0137] It can be understood that the movement of the second lens unit 102 can change the focal length of the lens assembly 10, and the focusing function of the lens assembly 10 can also be realized by the movement of the second lens unit, which further facilitates the realization of high imaging quality.

[0138] To realize the movement of the second lens unit 102, exemplarily, the camera module 110 may further include a lens driving structure (not shown in the figure). For example, the lens driving structure may be a driving chip, a driving motor, etc. The lens driving structure can be connected to the second lens unit 102, and the lens of the second lens unit 102 can be driven to move along the optical axis through the lens driving structure, so as to realize the switch of the lens assembly 10 between the infinite far state and the macro state.

[0139] In the embodiment of the present application, there is no restriction on the movement trajectory of the lenses in the second lens unit 102. For example, the lenses of the second lens unit 102 can move linearly along the optical axis, or the lenses of the second lens unit 102 can also move relative to the optical axis while rotating around the optical axis.

[0140] It should be noted that when the second lens unit 102 includes multiple lenses, there is no limitation on the movement of all the lenses in the second lens unit 102. For example, all the lenses of the second lens unit 102 can act as a whole, and the lens driving structure can drive the second lens unit 102 to move along the optical axis.

[0141] Alternatively, there may be multiple lens driving structures, one lens driving structure may be connected and cooperated with part of the lenses in the second lens unit 102, and multiple lens driving structures may respectively drive the corresponding parts of the lenses to move along the optical axis, thereby enabling all the lenses of the second lens unit 102 to move along the optical axis.

[0142] Taking a mobile phone as an example, the following describes an example of a scenario in which the camera module 110 implements telephoto and macro photography functions. For example, in one possible example, when a user turns on the mobile phone's photography function (e.g., by clicking to open a camera application on the mobile phone's display screen) and switches to telephoto mode for photography (e.g., by selecting telephoto mode on the display screen), the lens assembly 10 is in an infinity state, enabling high-quality photography of distant scenes. When the user switches from telephoto mode to macro mode for photography (e.g., by selecting macro mode on the display screen), the lens drive structure drives the second lens unit 102 to move along the optical axis toward the image side, placing the lens assembly 10 in a macro state, enabling high-quality photography of nearby scenes.

[0143] Accordingly, when a user activates the camera function of the mobile phone and switches to macro mode for shooting, the lens assembly 10 is in the macro state, enabling high-quality photography of nearby objects. When the user switches from macro mode to telephoto mode for shooting, the lens drive structure drives the second lens unit 102 to move along the optical axis toward the object side, placing the lens assembly 10 in the infinity state, enabling high-quality photography of distant objects.

[0144] Alternatively, in another possible example, the camera module 110 can also implement automatic selection of the shooting mode. For example, when the user turns on the shooting function of the mobile phone to take a picture, the camera module 110 can determine the applicable shooting mode according to the current imaging effect of the image sensor 20. For example, if the camera module 110 determines that the current scene is suitable for telephoto shooting and the lens assembly 10 is currently in the macro state, the lens driving structure can drive the second lens unit 102 to move along the optical axis toward the object side, so that the lens assembly 10 is in the infinity state.

[0145] Correspondingly, when the camera module 110 determines that the current scene is suitable for macro shooting and the lens assembly 10 is currently in the infinity state, the lens driving structure can drive the second lens unit 102 to move along the optical axis toward the image side, so that the lens assembly 10 is in the macro state.

[0146] In the embodiment of the present application, when the lens assembly 10 is in the infinity state, the aperture number is F#1, and the range of F#1 can be 1.0 < F#1 < 2.5. The aperture value of the lens assembly 10 is small, and it has the characteristic of a large aperture, ensuring that the lens assembly 10 has a high light input, and can better implement the long-focus telephoto function, ensuring high-quality imaging in the long-distance shooting scene.

[0147] When the lens assembly 10 is in the macro state, the aperture number is F#2, and the range of F#2 can be 1.0 < F#2 < 3. The aperture value is very small and is close to the aperture value in the infinity state, significantly improving the resolution of the lens assembly 10, and can better implement the macro function, achieving high-definition imaging in the close-up shooting scene.

[0148] When the lens assembly 10 is in the macro state, the magnification is Mag, where the magnification Mag refers to the ratio of the imaging length to the actual object length. The range of the magnification Mag of the lens assembly 10 can be 0.15x < Mag < 0.5x, which has a high magnification, can better meet the requirements of the close-up shooting scene, and further improves the imaging quality and effect of the lens assembly 10 in the close-up macro shooting scene.

[0149] Taking the total optical length of the lens assembly 10 as TTL, it can be understood that the total optical length TTL of the lens assembly 10 can be the distance from the first lens 11 to the imaging surface of the image sensor 20 on the optical axis L. The total optical length when the lens assembly 10 is in the infinity state and the total optical length when the lens assembly 10 is in the macro state are the same.

[0150] When the focal length of the lens module 10 in the macro state is EFL2, the ratio range of the focal length EFL2 of the lens module 10 in the macro state to the total optical length TTL of the lens module 10 can be 0.15 < |EFL2 / TTL| < 0.95. The lens module 10 has a smaller focal length in the macro state, which also makes the total optical length TTL of the lens module 10 smaller. The lens module 10 can achieve a small-size design, which is beneficial to meeting the thinning design requirements of the camera module and the electronic device.

[0151] The ratio range of the focal length EFL1 of the lens module 10 in the infinite far state to the focal length EFL2 of the lens module 10 in the macro state can be 1.1 < EFL1 / EFL2 < 3.2. When the lens module 10 has better telephoto characteristics in the long-distance shooting scenario, it can ensure that the lens module 10 has a larger magnification in the macro state, which is beneficial to achieving high-quality imaging in the long-distance shooting scenario and the near-field macro shooting effect with a high magnification.

[0152] When the focal length of the first lens unit 101 is G1, the ratio range of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens module 10 in the infinite far state can be 0.1 < |G1 / EFL1| < 0.9. By reasonably distributing the optical power of the first lens unit 101, when the lens module 10 has telephoto characteristics, the first lens unit 101 has a larger refractive power, which is beneficial to increasing the aperture of the lens module 10 and achieving high-quality imaging of the lens module 10 in the long-distance shooting scenario.

[0153] When the focal length of the second lens unit 102 is G2, the ratio range of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens module 10 in the infinite far state can be 0.1 < |G2 / EFL1| < 0.9. By reasonably distributing the optical power of the second lens unit 102, when the lens module 10 has telephoto characteristics, the second lens unit 102 also has a larger refractive power, which is also beneficial to increasing the aperture of the lens module 10 and achieving high-quality imaging of the lens module 10 in the long-distance shooting scenario.

[0154] In the embodiment of the present application, the lenses included in the first lens unit 101 and the second lens unit 102 can both be aspherical lenses. For example, the lens can be an aspherical lens. The aspherical lens can reduce or eliminate the spherical aberration and distortion aberration introduced by the spherical lens, which can further facilitate the realization of the large-aperture performance of the lens module 10, and at the same time, it is also beneficial to reducing the total length of the lens module 10.

[0155] The refractive index of the first lens element 11 is Nd1, and the range of the refractive index Nd1 of the first lens element 11 can be: 1.4 < Nd1 < 1.85. The relatively low refractive index of the first lens element 11 can effectively improve image quality and facilitate increasing the aperture of the lens assembly 10, thereby improving image quality.

[0156] The molding material of the first lens 11 can be plastic or glass, that is, the first lens 11 can be a plastic lens or a glass lens, both of which have relatively low costs, which is beneficial to reducing the cost of the lens assembly 10, and have high design flexibility, which is convenient for promotion and production.

[0157] The remaining lenses in the first lens unit 101 and the second lens unit 102 may also be formed of plastic or glass. For example, some lenses may be plastic lenses, and some lenses may be glass lenses.

[0158] The shape of each lens in the first lens unit 101 and the second lens unit 102 can be circular or elliptical, which has a wide range of applications and is easy to produce.

[0159] Alternatively, in some other examples, the lens can be shaped like a racetrack circle. For example, a circular (or elliptical) lens can be cut using ICUT cutting, whereby the edges of two opposing sides of the circular lens are removed, leaving the lens periphery with two opposing curved sidewalls and two opposing flat sidewalls, resulting in the overall shape of the lens being a racetrack circle. Compared to a circular lens, this can reduce the size of the lens and the space it occupies, thereby facilitating a compact design of the lens assembly 10 and the camera module 110.

[0160] Alternatively, in some other examples, the shape of the lens may also be square. For example, a circular (or elliptical) lens may be cut by SCUT cutting, where the peripheral edge of the circular lens is cut to make the lens as a whole square, with the peripheral side of the lens including four flat side walls. This can also reduce the size of the lens.

[0161] Of course, in some other examples, the shape of the lens may also be other regular or irregular shapes, which may be formed by cutting a circular lens.

[0162] In the embodiment of the present application, there is no restriction on the concave-convex shapes of the image side and object side of each lens in the lens assembly 10. At least the portion of the image side of the lens corresponding to the optical axis can be a convex surface or a concave surface, and at least the portion of the object side of the lens corresponding to the optical axis can be a convex surface or a concave surface. The specific shape can be selected and set according to the actual lens matching requirements.

[0163] The structure and performance of the lens assembly provided in this application are described below with reference to specific embodiments.

[0164] Example 1

[0165] FIG4 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 1 of the present application when the lens assembly is in an infinite distance state.

[0166] In the embodiment of the present application, as shown in FIG4 , the lens assembly 10 includes six lenses having optical power. The first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13. The second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0167] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0168] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0169] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0170] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0171] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0172] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0173] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a concave surface.

[0174] The sixth lens 16 may have negative optical power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface.

[0175] When the lens assembly 10 is in the infinity state, as shown in FIG4 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0176] FIG5 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 1 of the present application when the lens assembly is in a macro state.

[0177] 5 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0178] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 5.57, the curvature radius R12 of the image side surface of the first lens 11 is 33.98, the focal length f1 of the first lens 11 is 11.91, and the first lens 11 satisfies |(R11+R12) / f1|=3.32.

[0179] The focal length EFL1 of the lens assembly 10 when in the infinite state is 14.1, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.83.

[0180] The refractive index Nd1 of the first lens 11 is 1.547.

[0181] When the lens assembly 10 is in the infinity state, the aperture number F#1 is 2.03. When the lens assembly 10 is in the macro state, the aperture number F#2 is 2.02.

[0182] The magnification of the lens assembly 10 when in the macro state is Mag=0.315x.

[0183] The focal length G1 of the first lens unit 101 is 7.38, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.52.

[0184] The focal length G2 of the second lens unit 102 is -6.02, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.43.

[0185] The focal length EFL2 of the lens assembly 10 when in the macro state is 8.46, the total optical length TTL of the lens assembly 10 is 14.72, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.57.

[0186] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.67.

[0187] The following is an example description of the optical parameters of each lens in this embodiment.

[0188] Table 1.1 shows the optical parameters of each lens in a camera module provided in Example 1 of the present application.

[0189] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0190] S0 is the aperture 103, S1 and S2 are respectively the object side and image side of the first lens 11, S3 and S4 are respectively the object side and image side of the second lens 12, S5 and S6 are respectively the object side and image side of the third lens 13, S7 and S8 are respectively the object side and image side of the fourth lens 14, S9 and S10 are respectively the object side and image side of the fifth lens 15, S11 and S12 are respectively the object side and image side of the sixth lens 16, and S13 and S14 are respectively the object side and image side of the filter 30.

[0191] Thickness refers to the thickness of an optical element along the optical axis or the thickness of the air gap between optical elements. The thickness corresponding to the row containing the aperture 103 is the distance from the aperture 103 to the object side of the first lens 11 along the optical axis. The thickness corresponding to the row containing the object side of the first lens 11 is the thickness of the first lens 11 along the optical axis. The thickness corresponding to the row containing the image side of the first lens 11 is the distance from the image side of the first lens 11 to the object side of the second lens 12 along the optical axis. And so on.

[0192] The material refers to the refractive index and Abbe number of the lens. It should be noted that the material values ​​in Table 1 are a combination of the refractive index and the Abbe number. The refractive index of the lens is calculated by multiplying the decimal point (0.000) by 1.000, while the Abbe number is calculated by multiplying the decimal point (0.01) by 0.01. For example, for the first lens 11 (L1), if the material value is 547.528, the refractive index of the first lens 11 is 1.547, and the Abbe number of the first lens 11 is 52.8. Similarly, the material value is 547.528.

[0193] Y semi-aperture refers to the radius of the lens.

[0194] Table 1.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 1 of the present application.

[0195] As can be seen from Table 1.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0196] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0197] Table 1.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 1 of the present application.

[0198] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0199] By adopting the above-mentioned two lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 1.4 below.

[0200] Table 1.4 shows the optical parameters of a lens assembly provided in Example 1 of the present application.

[0201] As can be seen from Table 1.4, the lens assembly 10 provided in Example 1 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0202] FIG6a is a modulation transfer function curve diagram of a lens assembly provided in Example 1 of the present application when it is in an infinite distance state, and FIG6b is a modulation transfer function curve diagram of a lens assembly provided in Example 1 of the present application when it is in a macro state.

[0203] 6a and 6b represent different frequencies, the ordinate represents the modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. As can be seen from FIG6a and FIG6b, the lens assembly provided in this embodiment can achieve high-quality imaging in both the infinite distance state and the macro state.

[0204] Example 2

[0205] FIG7 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 2 of the present application when the lens assembly is in an infinite distance state.

[0206] In the embodiment of the present application, as shown in FIG7 , the lens assembly 10 includes six lenses having optical power. The first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13. The second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0207] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0208] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0209] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0210] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0211] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0212] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0213] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a concave surface.

[0214] The sixth lens 16 may have negative optical power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface.

[0215] When the lens assembly 10 is in the infinity state, as shown in FIG7 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0216] FIG8 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 2 of the present application when the lens assembly is in a macro state.

[0217] 8 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0218] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.91, the curvature radius R12 of the image side surface of the first lens 11 is -62.18, the focal length f1 of the first lens 11 is 12.96, and the first lens 11 satisfies |(R11+R12) / f1|=4.2.

[0219] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.2, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.85.

[0220] The refractive index Nd1 of the first lens 11 is 1.544.

[0221] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.98, and the aperture number F#2 when the lens assembly 10 is in the macro state is 1.96.

[0222] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0223] The focal length G1 of the first lens unit 101 is 8.27, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.54.

[0224] The focal length G2 of the second lens unit 102 is -7.98, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.53.

[0225] The focal length EFL2 of the lens assembly 10 when in the macro state is 9.7, the total optical length TTL of the lens assembly 10 is 17.3, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.56.

[0226] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.57.

[0227] The following is an example description of the optical parameters of each lens in this embodiment.

[0228] Table 2.1 shows the optical parameters of each lens in a camera module provided in Example 2 of the present application.

[0229] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0230] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0231] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0232] Table 2.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 2 of the present application.

[0233] As can be seen from Table 2.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0234] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0235] Table 2.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 2 of the present application.

[0236] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0237] The lens assembly 10 adopts the above-mentioned two lens unit structure and reasonably allocates the optical focal length of the two lens units and the first lens. By matching the number of lenses and the focal length, thickness, refractive index, Abbe number, etc. of each lens, it is possible to achieve the characteristics of large aperture, small size, low cost and high resolution of the lens assembly 10. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 2.4 below.

[0238] Table 2.4 shows the optical parameters of a lens assembly provided in Example 2 of the present application.

[0239] As can be seen from Table 2.4, the lens assembly 10 provided in Example 2 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0240] FIG9a is a modulation transfer function curve diagram of a lens assembly provided in Example 2 of the present application when it is in an infinite distance state, and FIG9b is a modulation transfer function curve diagram of a lens assembly provided in Example 2 of the present application when it is in a macro state.

[0241] 9a and 9b represent different frequencies, the ordinate represents the modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. As can be seen from FIG9a and FIG9b , the lens assembly provided in this embodiment can achieve high-quality imaging in both the infinite distance state and the macro state.

[0242] Example 3

[0243] FIG10 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 3 of the present application when the lens assembly is in an infinite distance state.

[0244] In the embodiment of the present application, as shown in FIG10 , the lens assembly 10 includes six lenses having optical power. The first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13. The second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0245] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0246] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0247] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0248] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0249] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0250] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0251] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0252] The sixth lens 16 may have negative optical power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface.

[0253] When the lens assembly 10 is in the infinity state, as shown in FIG10 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0254] FIG11 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 3 of the present application when the lens assembly is in a macro state.

[0255] 11 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0256] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.23, the curvature radius R12 of the image side surface of the first lens 11 is 160.58, the focal length f1 of the first lens 11 is 13.80, and the first lens 11 satisfies |(R11+R12) / f1|=12.2.

[0257] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.1, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.88.

[0258] The refractive index Nd1 of the first lens 11 is 1.544.

[0259] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.98, and the aperture number F#2 when the lens assembly 10 is in the macro state is 2.03.

[0260] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0261] The focal length G1 of the first lens unit 101 is 8.51, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.56.

[0262] The focal length G2 of the second lens unit 102 is -9.28, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.61.

[0263] The focal length EFL2 of the lens assembly 10 when in the macro state is 9.96, the total optical length TTL of the lens assembly 10 is 17.12, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.58.

[0264] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.52.

[0265] The following is an example description of the optical parameters of each lens in this embodiment.

[0266] Table 3.1 shows the optical parameters of each lens in a camera module provided in Example 3 of the present application.

[0267] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0268] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0269] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0270] Table 3.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 3 of the present application.

[0271] As can be seen from Table 3.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0272] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0273] Table 3.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 3 of the present application.

[0274] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0275] The lens assembly 10 adopts the above-mentioned two lens unit structure and reasonably allocates the optical focal length of the two lens units and the first lens. By matching the number of lenses and the focal length, thickness, refractive index, Abbe number, etc. of each lens, it is possible to achieve the characteristics of large aperture, small size, low cost and high resolution of the lens assembly 10. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 3.4 below.

[0276] Table 3.4 shows the optical parameters of a lens assembly provided in Example 3 of the present application.

[0277] As can be seen from Table 3.4, the lens assembly 10 provided in Example 3 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0278] Figure 12a is a modulation transfer function curve diagram of a lens assembly provided in Example 3 of the present application when it is in an infinite distance state, and Figure 12b is a modulation transfer function curve diagram of a lens assembly provided in Example 3 of the present application when it is in a macro state.

[0279] In which, the horizontal axis in Figure 12a and Figure 12b represents different frequencies, the vertical axis represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. It can be seen from Figures 12a and 12b that the lens assembly provided in this embodiment can achieve high-quality imaging in both the infinite distance state and the macro state.

[0280] Example 4

[0281] FIG13 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 4 of the present application when the lens assembly is in an infinite distance state.

[0282] In the embodiment of the present application, as shown in FIG13 , the lens assembly 10 includes six lenses having optical power. The first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13. The second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0283] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0284] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0285] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0286] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0287] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0288] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0289] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0290] The sixth lens 16 may have negative optical power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface.

[0291] When the lens assembly 10 is in the infinity state, as shown in FIG13 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0292] FIG14 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in a fourth embodiment of the present application when the lens assembly is in a macro state.

[0293] 14 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0294] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.59, the curvature radius R12 of the image side surface of the first lens 11 is 88.75, the focal length f1 of the first lens 11 is 15.05, and the first lens 11 satisfies |(R11+R12) / f1|=6.4.

[0295] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.2, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1=0.99.

[0296] The refractive index Nd1 of the first lens 11 is 1.544.

[0297] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.98, and the aperture number F#2 when the lens assembly 10 is in the macro state is 2.03.

[0298] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0299] The focal length G1 of the first lens unit 101 is 8.78, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.58.

[0300] The focal length G2 of the second lens unit 102 is -10.07, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.66.

[0301] The focal length EFL2 of the lens assembly 10 when in the macro state is 10, the total optical length TTL of the lens assembly 10 is 17.26, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.58.

[0302] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.52.

[0303] The following is an example description of the optical parameters of each lens in this embodiment.

[0304] Table 4.1 shows the optical parameters of each lens in a camera module provided in Example 4 of the present application.

[0305] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0306] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0307] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0308] Table 4.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 4 of the present application.

[0309] As shown in Table 4.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0310] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0311] Table 4.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 4 of the present application.

[0312] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0313] By adopting the above-mentioned two-lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 4.4 below.

[0314] Table 4.4 shows the optical parameters of a lens assembly provided in Example 4 of the present application.

[0315] In this embodiment, the half image height when the lens assembly 10 is in the infinity state may be different from the half image height when the lens assembly 10 is in the macro state to meet the imaging quality requirements.

[0316] As can be seen from Table 4.4, the lens assembly 10 provided in Example 4 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0317] Figure 15a is a modulation transfer function curve diagram of a lens assembly provided in Example 4 of the present application when it is in an infinite distance state, and Figure 15b is a modulation transfer function curve diagram of a lens assembly provided in Example 4 of the present application when it is in a macro state.

[0318] In which, the horizontal axis in Figures 15a and 15b represents different frequencies, the vertical axis represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. It can be seen from Figures 15a and 15b that the lens assembly provided in this embodiment can achieve high-quality imaging in both the infinite distance state and the macro state.

[0319] Example 5

[0320] FIG16 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 5 of the present application when the lens assembly is in an infinite distance state.

[0321] In the embodiment of the present application, as shown in FIG16 , the lens assembly 10 includes six lenses having optical power. The first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13. The second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0322] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0323] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0324] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0325] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0326] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0327] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0328] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0329] The sixth lens 16 may have negative power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface.

[0330] When the lens assembly 10 is in the infinity state, as shown in FIG16 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0331] FIG17 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 5 of the present application when the lens assembly is in a macro state.

[0332] 17 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0333] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.81, the curvature radius R12 of the image side surface of the first lens 11 is 152.96, the focal length f1 of the first lens 11 is 14.98, and the first lens 11 satisfies |(R11+R12) / f1|=10.7.

[0334] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.2, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1=0.99.

[0335] The refractive index Nd1 of the first lens 11 is 1.544.

[0336] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.98, and the aperture number F#2 when the lens assembly 10 is in the macro state is 2.02.

[0337] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0338] The focal length G1 of the first lens unit 101 is 8.78, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.58.

[0339] The focal length G2 of the second lens unit 102 is -10.07, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.66.

[0340] The focal length EFL2 of the lens assembly 10 when in the macro state is 10, the total optical length TTL of the lens assembly 10 is 17.26, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.58.

[0341] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.52.

[0342] The following is an example description of the optical parameters of each lens in this embodiment.

[0343] Table 5.1 shows the optical parameters of each lens in a camera module provided in Example 5 of the present application.

[0344] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0345] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0346] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0347] Table 5.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 5 of the present application.

[0348] As can be seen from Table 5.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0349] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0350] Table 5.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 5 of the present application.

[0351] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0352] The lens assembly 10 adopts the above-mentioned two lens unit structure and reasonably allocates the optical focal length of the two lens units and the first lens. By matching the number of lenses and the focal length, thickness, refractive index, Abbe number, etc. of each lens, it is possible to achieve the characteristics of large aperture, small size, low cost and high resolution of the lens assembly 10. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be shown in Table 5.4 below.

[0353] Table 5.4 shows the optical parameters of a lens assembly provided in Example 5 of the present application.

[0354] As can be seen from Table 5.4, the lens assembly 10 provided in Example 5 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0355] Example 6

[0356] FIG18 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 6 of the present application when the lens assembly is in an infinite distance state.

[0357] In the embodiment of the present application, as shown in FIG18 , the lens assembly 10 includes six lenses having optical power. The first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13. The second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0358] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0359] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0360] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0361] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0362] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0363] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0364] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0365] The sixth lens 16 may have negative optical power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface.

[0366] 18 , when the lens assembly 10 is in the infinity state, the second lens unit 102 is closer to the first lens unit 101 and is relatively farther from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0367] Figure 19 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 6 of the present application when it is in a macro state.

[0368] 19 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0369] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.81, the curvature radius R12 of the image side surface of the first lens 11 is -703.84, the focal length f1 of the first lens 11 is 14.17, and the first lens 11 satisfies |(R11+R12) / f1|=49.1.

[0370] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.1, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.94.

[0371] The refractive index Nd1 of the first lens 11 is 1.544.

[0372] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.98, and the aperture number F#2 when the lens assembly 10 is in the macro state is 2.02.

[0373] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0374] The focal length G1 of the first lens unit 101 is 8.76, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.58.

[0375] The focal length G2 of the second lens unit 102 is -10.24, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.68.

[0376] The focal length EFL2 of the lens assembly 10 when in the macro state is 10.1, the total optical length TTL of the lens assembly 10 is 17.16, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.59.

[0377] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.49.

[0378] The following is an example description of the optical parameters of each lens in this embodiment.

[0379] Table 6.1 shows the optical parameters of each lens in a camera module provided in Example 6 of the present application.

[0380] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0381] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0382] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0383] Table 6.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 6 of the present application.

[0384] As can be seen from Table 6.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0385] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0386] Table 6.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 6 of the present application.

[0387] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0388] By adopting the above-mentioned two-lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 6.4 below.

[0389] Table 6.4 shows the optical parameters of a lens assembly provided in Example 6 of the present application.

[0390] As can be seen from Table 6.4, the lens assembly 10 provided in Example 6 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0391] FIG20 is a modulation transfer function curve diagram of a lens assembly provided in Example 6 of the present application when it is in an infinite distance state.

[0392] 20 represents different frequencies, the ordinate represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. As can be seen from FIG20 , the lens assembly provided in this embodiment can achieve high-quality imaging.

[0393] Example 7

[0394] Figure 21 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 7 of the present application when it is in an infinite distance state.

[0395] In the embodiment of the present application, as shown in FIG21 , the lens assembly 10 includes six lenses having optical power. The first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13. The second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0396] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0397] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0398] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0399] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0400] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0401] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0402] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0403] The sixth lens 16 may have negative optical power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface.

[0404] When the lens assembly 10 is in the infinity state, as shown in FIG21 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0405] Figure 22 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 7 of the present application when it is in a macro state.

[0406] 22 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0407] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.48, the curvature radius R12 of the image side surface of the first lens 11 is -145.88, the focal length f1 of the first lens 11 is 13.11, and the first lens 11 satisfies |(R11+R12) / f1|=10.56.

[0408] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.1, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1=0.87.

[0409] The refractive index Nd1 of the first lens 11 is 1.544.

[0410] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.98, and the aperture number F#2 when the lens assembly 10 is in the macro state is 2.02.

[0411] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0412] The focal length G1 of the first lens unit 101 is 8.78, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.58.

[0413] The focal length G2 of the second lens unit 102 is -10.42, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.69.

[0414] The focal length EFL2 of the lens assembly 10 when in the macro state is 10.1, the total optical length TTL of the lens assembly 10 is 17.83, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.56.

[0415] A ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.50.

[0416] The following is an example description of the optical parameters of each lens in this embodiment.

[0417] Table 7.1 shows the optical parameters of each lens in a camera module provided in Example 7 of the present application.

[0418] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0419] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0420] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0421] Table 7.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 7 of the present application.

[0422] As shown in Table 7.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0423] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0424] Table 7.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 7 of the present application.

[0425] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0426] The lens assembly 10 adopts the above-mentioned two lens unit structure and reasonably distributes the optical focal length of the two lens units and the first lens. By matching the number of lenses and the focal length, thickness, refractive index, Abbe number, etc. of each lens, it can achieve the characteristics of large aperture, small size, low cost and high resolution of the lens assembly 10. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 7.4 below.

[0427] Table 7.4 shows the optical parameters of a lens assembly provided in Example 7 of the present application.

[0428] As can be seen from Table 7.4, the lens assembly 10 provided in Example 7 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0429] FIG23 is a modulation transfer function curve diagram of a lens assembly provided in Example 7 of the present application when it is in an infinite distance state.

[0430] 23 represents different frequencies, the ordinate represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. As can be seen from FIG23 , the lens assembly provided in this embodiment can achieve high-quality imaging.

[0431] Example 8

[0432] Figure 24 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 8 of the present application when it is in an infinite distance state.

[0433] In the embodiment of the present application, as shown in FIG24 , the lens assembly 10 includes six lenses having optical power, wherein the first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13, and the second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0434] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0435] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0436] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0437] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0438] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0439] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0440] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0441] The sixth lens 16 may have negative power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface.

[0442] When the lens assembly 10 is in the infinity state, as shown in FIG24 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0443] Figure 25 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 8 of the present application when it is in a macro state.

[0444] 25 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0445] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.97, the curvature radius R12 of the image side surface of the first lens 11 is 257.72, the focal length f1 of the first lens 11 is 15.03, and the first lens 11 satisfies |(R11+R12) / f1|=17.68.

[0446] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.3, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1=0.98.

[0447] The refractive index Nd1 of the first lens 11 is 1.544.

[0448] When the lens assembly 10 is in the infinity state, the aperture number F#1 is 1.77. When the lens assembly 10 is in the macro state, the aperture number F#2 is 1.82.

[0449] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0450] The focal length G1 of the first lens unit 101 is 8.64, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.57.

[0451] The focal length G2 of the second lens unit 102 is -8.66, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.57.

[0452] The focal length EFL2 of the lens assembly 10 when in the macro state is 9.47, the total optical length TTL of the lens assembly 10 is 17.9, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.53.

[0453] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.62.

[0454] The following is an example description of the optical parameters of each lens in this embodiment.

[0455] Table 8.1 shows the optical parameters of each lens in a camera module provided in Example 8 of the present application.

[0456] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0457] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0458] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0459] Table 8.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 8 of the present application.

[0460] As shown in Table 8.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0461] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0462] Table 8.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 8 of the present application.

[0463] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0464] By adopting the above-mentioned two lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 8.4 below.

[0465] Table 8.4 shows the optical parameters of a lens assembly provided in Example 8 of the present application.

[0466] It can be seen from Table 8.4 that the lens assembly 10 provided in Example 8 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensure high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensure high-definition imaging in scenes such as close-up shooting.

[0467] Example 9

[0468] Figure 26 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 9 of the present application when it is in an infinite distance state.

[0469] In the embodiment of the present application, as shown in FIG26 , the lens assembly 10 includes six lenses having optical power, wherein the first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13, and the second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0470] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0471] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0472] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0473] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0474] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0475] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0476] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0477] The sixth lens 16 may have negative power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface.

[0478] When the lens assembly 10 is in the infinity state, as shown in FIG26 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0479] Figure 27 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 9 of the present application when it is in a macro state.

[0480] 27 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0481] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.69, the curvature radius R12 of the image side surface of the first lens 11 is -123.61, the focal length f1 of the first lens 11 is 13.40, and the first lens 11 satisfies |(R11+R12) / f1|=8.65.

[0482] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.3, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.88.

[0483] The refractive index Nd1 of the first lens 11 is 1.544.

[0484] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.69, and the aperture number F#2 when the lens assembly 10 is in the macro state is 1.72.

[0485] The magnification of the lens assembly 10 when in the macro state is Mag=0.3x.

[0486] The focal length G1 of the first lens unit 101 is 8.64, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.57.

[0487] The focal length G2 of the second lens unit 102 is -8.79, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.58.

[0488] The focal length EFL2 of the lens assembly 10 when in the macro state is 9.55, the total optical length TTL of the lens assembly 10 is 17.7, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.54.

[0489] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.60.

[0490] The following is an example description of the optical parameters of each lens in this embodiment.

[0491] Table 9.1 shows the optical parameters of each lens in a camera module provided in Example 9 of the present application.

[0492] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0493] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0494] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0495] Table 9.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 9 of the present application.

[0496] As shown in Table 9.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0497] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0498] Table 9.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 9 of the present application.

[0499] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0500] By adopting the above-mentioned two-lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 9.4 below.

[0501] Table 9.4 shows the optical parameters of a lens assembly provided in Example 9 of the present application.

[0502] It can be seen from Table 9.4 that the lens assembly 10 provided in Example 9 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensure high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensure high-definition imaging in scenes such as close-up shooting.

[0503] FIG28 is a modulation transfer function curve diagram of a lens assembly provided in Example 9 of the present application when it is in an infinite distance state.

[0504] 28 represents different frequencies, the ordinate represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. As can be seen from FIG28 , the lens assembly provided in this embodiment can achieve high-quality imaging.

[0505] Example 10

[0506] Figure 29 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 10 of the present application when it is in an infinite distance state.

[0507] In the embodiment of the present application, as shown in FIG29 , the lens assembly 10 includes six lenses having optical power, wherein the first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13, and the second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0508] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0509] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0510] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0511] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0512] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0513] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0514] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0515] The sixth lens 16 may have negative power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface.

[0516] When the lens assembly 10 is in the infinity state, as shown in FIG29 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0517] Figure 30 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 10 of the present application when it is in a macro state.

[0518] 30 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0519] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 8.50, the curvature radius R12 of the image side surface of the first lens 11 is -51.71, the focal length f1 of the first lens 11 is 12.29, and the first lens 11 satisfies |(R11+R12) / f1|=3.52.

[0520] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.1, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.81.

[0521] The refractive index Nd1 of the first lens 11 is 1.544.

[0522] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.58, and the aperture number F#2 when the lens assembly 10 is in the macro state is 1.54.

[0523] The magnification of the lens assembly 10 when in the macro state is Mag=0.295x.

[0524] The focal length G1 of the first lens unit 101 is 9.03, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.60.

[0525] The focal length G2 of the second lens unit 102 is -10.2, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.67.

[0526] The focal length EFL2 of the lens assembly 10 when in the macro state is 9.48, the total optical length TTL of the lens assembly 10 is 18.5, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.51.

[0527] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.59.

[0528] The following is an example description of the optical parameters of each lens in this embodiment.

[0529] Table 10.1 shows the optical parameters of each lens in a camera module provided in Example 10 of the present application.

[0530] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0531] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0532] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0533] Table 10.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 10 of the present application.

[0534] As can be seen from Table 10.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0535] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0536] Table 10.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 10 of the present application.

[0537] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0538] By adopting the above-mentioned two-lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 10.4 below.

[0539] Table 10.4 shows the optical parameters of a lens assembly provided in Example 10 of the present application.

[0540] As can be seen from Table 10.4, the lens assembly 10 provided in Example 10 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensuring high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenes such as close-up shooting.

[0541] FIG31 is a modulation transfer function curve diagram of a lens assembly provided in Example 10 of the present application when it is in an infinite distance state.

[0542] 31 represents different frequencies, the ordinate represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dotted line in the figure represents the meridional field of view, and the diff.limit in the figure represents the modulation transfer function of the imaging system for an infinitesimal object point. The closer to the diff.limit curve, the better the imaging quality. As can be seen from FIG31 , the lens assembly provided in this embodiment can achieve high-quality imaging.

[0543] Example 11

[0544] Figure 32 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 11 of the present application when it is in an infinite distance state.

[0545] In the embodiment of the present application, as shown in FIG32 , the lens assembly 10 includes six lenses having optical power, wherein the first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13, and the second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0546] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0547] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0548] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a concave surface.

[0549] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0550] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0551] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0552] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0553] The sixth lens 16 may have negative power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface.

[0554] When the lens assembly 10 is in the infinity state, as shown in FIG32 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0555] Figure 33 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 11 of the present application when it is in a macro state.

[0556] 33 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0557] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 7.97, the curvature radius R12 of the image side surface of the first lens 11 is -5112.89, the focal length f1 of the first lens 11 is 14.56, and the first lens 11 satisfies |(R11+R12) / f1|=350.6.

[0558] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.05, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.98.

[0559] The refractive index Nd1 of the first lens 11 is 1.544.

[0560] The aperture number F#1 when the lens assembly 10 is in the infinity state is 1.48, and the aperture number F#2 when the lens assembly 10 is in the macro state is 1.46.

[0561] The magnification of the lens assembly 10 when in the macro state is Mag=0.293x.

[0562] The focal length G1 of the first lens unit 101 is 8.64, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.57.

[0563] The focal length G2 of the second lens unit 102 is -8.95, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.59.

[0564] The focal length EFL2 of the lens assembly 10 when in the macro state is 9.53, the total optical length TTL of the lens assembly 10 is 17.94, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.53.

[0565] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 1.58.

[0566] The following is an example description of the optical parameters of each lens in this embodiment.

[0567] Table 11.1 shows the optical parameters of each lens in a camera module provided in Example 11 of the present application.

[0568] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0569] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0570] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0571] Table 11.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 11 of the present application.

[0572] As shown in Table 11.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0573] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0574] Table 11.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 11 of the present application.

[0575] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0576] By adopting the above-mentioned two-lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 14.4 below.

[0577] Table 11.4 shows the optical parameters of a lens assembly provided in Example 11 of the present application.

[0578] It can be seen from Table 11.4 that the lens assembly 10 provided in Example 11 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensure high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensure high-definition imaging in scenes such as close-up shooting.

[0579] Example 12

[0580] Figure 34 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 12 of the present application when it is in an infinite distance state.

[0581] In the embodiment of the present application, as shown in FIG34 , the lens assembly 10 includes six lenses having optical power, wherein the first lens unit 101 may include three lenses having optical power, such as a first lens 11, a second lens 12, and a third lens 13, and the second lens unit 102 may include three lenses having optical power, such as a fourth lens 14, a fifth lens 15, and a sixth lens 16. Along the optical axis L, from the object side to the image side, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged in sequence.

[0582] That is, in the camera module 110, the aperture 103, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the filter 30, and the image sensor 20 are arranged in sequence along the optical axis L from the object side to the image side. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0583] The first lens unit 101 has positive refractive power, and the second lens unit 102 has negative refractive power.

[0584] Specifically, the first lens 11 may have positive power, at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0585] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a convex surface.

[0586] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0587] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0588] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a concave surface.

[0589] The sixth lens 16 may have negative optical power, and at least a portion of the object-side surface of the sixth lens 16 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the sixth lens 16 corresponding to the optical axis may be a convex surface.

[0590] When the lens assembly 10 is in the infinity state, as shown in FIG34 , the second lens unit 102 is closer to the first lens unit 101 and is relatively farther away from the filter 30 and the image sensor 20. When the lens assembly 10 switches from the infinity state to the macro state, the second lens unit 102 moves along the optical axis L toward the image side.

[0591] Figure 35 is a schematic diagram of the simulation structure of a lens assembly in a camera module provided in Example 12 of the present application when it is in a macro state.

[0592] 35 , when the lens assembly 10 is in the macro state, the second lens unit 12 is closer to the filter 30 and the image sensor 20 , and is relatively far away from the first lens unit 101 .

[0593] Among them, the curvature radius R11 of the object side surface of the first lens 11 is 10.14, the curvature radius R12 of the image side surface of the first lens 11 is -43, the focal length f1 of the first lens 11 is 14.1, and the first lens 11 satisfies |(R11+R12) / f1|=2.33.

[0594] The focal length EFL1 of the lens assembly 10 when in the infinite state is 15.35, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL1 of the lens assembly 10 when in the infinite state is f1 / EFL1 = 0.95.

[0595] The refractive index Nd1 of the first lens 11 is 1.544.

[0596] When the lens assembly 10 is in the infinity state, the aperture number F#1 is 1.88. When the lens assembly 10 is in the macro state, the aperture number F#2 is 1.85.

[0597] The magnification of the lens assembly 10 when in the macro state is Mag=0.47x.

[0598] The focal length G1 of the first lens unit 101 is 8.64, and the ratio of the focal length G1 of the first lens unit 101 to the focal length EFL1 of the lens assembly 10 at infinity is |G1 / EFL1|=0.56.

[0599] The focal length G2 of the second lens unit 102 is -8.71, and the ratio of the focal length G2 of the second lens unit 102 to the focal length EFL1 of the lens assembly 10 at infinity is |G2 / EFL1|=0.56.

[0600] The focal length EFL2 of the lens assembly 10 when in the macro state is 7.34, the total optical length TTL of the lens assembly 10 is 18.9, and the ratio of the focal length EFL2 of the lens assembly 10 when in the macro state to the total optical length TTL of the lens assembly 10 |EFL2 / TTL| is 0.39.

[0601] The ratio of the focal length EFL1 when the lens assembly 10 is in the infinity state to the focal length EFL2 when the lens assembly 10 is in the macro state is EFL1 / EFL2 = 2.09.

[0602] The following is an example description of the optical parameters of each lens in this embodiment.

[0603] Table 12.1 shows the optical parameters of each lens in a camera module provided in Example 12 of the present application.

[0604] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, and IR is the filter 30.

[0605] The specific schematic diagram of S0-S14 can be found in the first embodiment, which will not be described in detail in the embodiment.

[0606] The meanings of parameters such as the radius of curvature, thickness, material, and Y semi-aperture can also be found in the first embodiment and will not be repeated in this embodiment.

[0607] Table 12.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 12 of the present application.

[0608] As shown in Table 12.2, all lenses in the lens assembly 10 are aspherical lenses, that is, the lens assembly 10 includes 12 aspherical surfaces. The aspherical surface shape Z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0609] Among them, parameter c = 1 / R, R is the radius of curvature, r is the distance from a point on the optical surface to the optical axis, Z is the aspheric surface vector height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, in this embodiment i is 30, and Ai is the aspheric coefficient.

[0610] Table 12.3 shows the focal lengths of the lenses and lens units in a lens assembly provided in Example 12 of the present application.

[0611] Among them, f1, f2, f3, f4, f5, and f6 are the focal lengths of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16, respectively.

[0612] By adopting the above-mentioned two-lens unit structure and rationally allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve the characteristics of large aperture, small size, low cost and high resolution by matching the number of lenses, as well as the focal length, thickness, refractive index, Abbe number, etc. of each lens. The optical parameters of the lens assembly 10 composed of the above-mentioned lenses can be seen in Table 12.4 below.

[0613] Table 12.4 shows the optical parameters of a lens assembly provided in Example 12 of the present application.

[0614] It can be seen from Table 12.4 that the lens assembly 10 provided in Example 12 of the present application has the characteristics of large aperture and small total optical length, which can realize the long-focus telephoto function, ensure high-quality imaging in scenes such as long-range shooting, and can also realize the macro function with high magnification and resolution, ensure high-definition imaging in scenes such as close-up shooting.

[0615] It should be noted that the numerical values ​​and numerical ranges involved in the embodiments of the present application are approximate values ​​and may have a certain range of errors. Those skilled in the art may consider such errors to be negligible.

[0616] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances. The terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0617] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lens assembly, characterized in that: It includes at least a first lens unit and a second lens unit arranged in sequence from the object side to the image side along the optical axis. The first lens unit and the second lens unit respectively include lenses with optical power. The first lens unit has a positive optical power, and the second lens unit has a negative optical power; The second lens unit is movably arranged along the optical axis. The second lens unit moves along the optical axis toward the image side to switch the lens assembly from an infinity state to a macro state; The lens of the first lens unit at least includes a first lens, and the first lens is located on the side adjacent to the object side in the first lens unit; The first lens satisfies the conditional formula: |(R11 + R12) / f1| > 2.3, where R11 is the curvature radius of the object side surface of the first lens, R12 is the curvature radius of the image side surface of the first lens, and f1 is the focal length of the first lens; The lens assembly satisfies the conditional formula: 0.75 < f1 / EFL1 < 1, where EFL1 is the focal length of the lens assembly in the infinity state.

2. The lens assembly according to claim 1, characterized in that: The aperture number F#1 of the lens assembly in the infinity state satisfies the conditional formula: 1.0 < F#1 < 2.

5.

3. The lens assembly according to claim 1 or 2, characterized in that: The aperture number F#2 of the lens assembly in the macro state satisfies the conditional formula: 1.0 < F#2 < 3.

4. The lens assembly according to any one of claims 1 to 3, characterized in that: The magnification Mag of the lens assembly in the macro state satisfies the conditional formula: 0.15x < Mag < 0.5x.

5. The lens assembly according to any one of claims 1 to 4, characterized in that: The lens assembly also satisfies the conditional formula: 0.1 < |G1 / EFL1| < 0.9, where G1 is the focal length of the first lens unit.

6. The lens assembly according to any one of claims 1 to 5, characterized in that: The lens assembly also satisfies the conditional formula: 0.1 < |G2 / EFL1| < 0.9, where G2 is the focal length of the second lens unit.

7. The lens assembly according to any one of claims 1 to 6, characterized in that: The lens assembly also satisfies the conditional formula: 0.15 < |EFL2 / TTL| < 0.95, where TTL is the overall optical length of the lens assembly, and EFL2 is the focal length of the lens assembly in the macro state.

8. The lens assembly according to any one of claims 1 to 7, characterized in that: The lens assembly also satisfies the conditional formula: 1.1 < EFL1 / EFL2 < 3.2, where EFL2 is the focal length of the lens assembly in the macro state.

9. The lens assembly according to any one of claims 1 to 8, characterized in that: The refractive index Nd1 of the first lens satisfies the conditional formula: 1.4 < Nd1 < 1.

85.

10. The lens assembly according to claim 9, characterized in that: The molding material of the first lens is glass or plastic.

11. The lens assembly according to any one of claims 1 to 10, characterized in that: The shape of the lens at least includes one or a combination of a circle, an ellipse, a racetrack shape, a square, etc.

12. The lens assembly according to any one of claims 1 to 11, characterized in that: The first lens unit includes a first lens, a second lens, and a third lens arranged in sequence from the object side to the image side along the optical axis. The first lens has a positive optical power, the second lens has a negative optical power, and the third lens has a positive optical power; The second lens unit includes a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. The fourth lens has a negative optical power, the fifth lens has a positive optical power, and the sixth lens has a negative optical power.

13. A camera module, characterized in that: It at least includes an image sensor and the lens assembly according to any one of claims 1 - 12 above. The image sensor is located on the side of the lens assembly facing the image side.

14. An electronic device, characterized in that: The method comprises at least a shell and the camera module as described in claim 13, wherein the camera module is arranged on the shell.

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