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 components, camera modules and electronic devices

[0001] This application claims priority to Chinese Patent Application No. 202311129967.5, filed on August 31, 2023, entitled "Lens Assembly, Camera Module and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of camera technology, and in particular to a lens assembly, camera module and electronic device. Background Technology

[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. With the development of multifunctional electronic devices, their shooting effects and requirements are increasingly comparable to those of SLR cameras, and the functional effects of camera modules have gradually become one of the important features of electronic devices.

[0004] Currently, camera modules typically consist of a lens assembly and an image sensor. The lens assembly is usually formed by arranging multiple lenses sequentially along the optical axis. Light passes through the lens assembly and is projected onto the image sensor for photoelectric conversion, which is then used for image formation. Therefore, the performance of the lens assembly directly determines the imaging performance of the camera module. A large aperture design is beneficial for functions such as night scene shooting, snapshots, video recording, and background blurring. Furthermore, in different shooting scenarios, such as in low-light or nighttime environments, when shooting distant objects, the lens assembly needs a large aperture to allow more light in, resulting in better image quality and meeting the needs of shooting infinity-edge scenes. For close-up shooting scenarios, such as shooting flowers, toys, insects, and other close-up objects, a large aperture lens assembly provides better sharpness, enabling detailed shooting 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 distant scenes and also achieve high-resolution macro shooting capabilities.

[0006] Summary of the Invention

[0007] This application provides a lens assembly, a camera module, and an electronic device. The lens assembly can achieve a large aperture design and enable telephoto shooting, meeting the high-quality imaging requirements of distant shooting scenarios. It can also achieve high magnification and resolution macro shooting, meeting the high-definition imaging requirements of close-up shooting scenarios.

[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 each include a lens with a focal power. The first lens unit has a positive focal power, and the second lens unit has a negative focal power. By adopting the architecture of two lens units and reasonably distributing the focal powers of the two lens units 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 toward the image side to switch the lens assembly from an infinite far state to a 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 a long-distance shooting scenario, realize the long focal length telephoto function of the lens assembly, ensure high-quality imaging in the long-distance shooting scenario, and also improve the resolution of the lens assembly in the close-range shooting scenario, which is beneficial to realizing a macro function with a high magnification ratio and resolution and ensuring high-definition imaging in the close-range shooting scenario.

[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 a focal 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 architecture of the two lens units, by making the first lens unit satisfy the above conditional formula, the focal power of the first lens can be more reasonably distributed, which is beneficial to improving the refractive power of the first lens, increasing the light input amount 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 long focal length characteristic in the long-distance shooting scenario, it is ensured that the first lens has a stronger refractive power, and the focal 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 amount, being able to better realize the long focal length telephoto function, and ensuring high-quality imaging in the long-distance shooting scenario.

[0013] In a possible implementation, when the lens module 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 similar to the aperture value in the infinite far state, significantly improving the resolution of the lens module, 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 module is in the macro state, the magnification Mag satisfies the conditional formula: 0.15x < Mag < 0.5x. The lens module 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 module in the close-up shooting scenario.

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

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

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

[0018] In a possible implementation, the lens module also satisfies the conditional formula: 1.1 < EFL1 / EFL2 < 3.2, where EFL2 is the focal length of the lens module in the macro state. Under the condition that the lens module has better telephoto characteristics in the long-distance shooting scenario, it can ensure that the lens module has a larger magnification in the macro state, which is beneficial for 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 equation: 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 conducive 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 is conducive 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 includes at least one or more combinations of circular, elliptical, racetrack-shaped, and square. This is conducive 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 elliptical lenses, which is conducive 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 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. By adopting a structure with three lenses as one lens unit, the formed lens module is relatively simple, has a small volume and low cost, and by reasonably distributing the optical powers of each lens, it is conducive to further increasing the aperture of the lens module and realizing the large aperture design of the lens module.

[0023] In the second aspect of the embodiments of the present application, a camera module is provided, 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 a lens module with large aperture characteristics, the lens module also has telephoto and macro functions, enabling high-quality imaging in long-distance shooting scenarios, and also enabling 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 conducive to realizing the thinning design of the camera module.

[0025] In the third aspect of the embodiments of the present application, an electronic device is provided, 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 needs of both long-distance and close-up shooting, achieving high-quality imaging in both long-distance and close-up shooting scenarios, which is beneficial to improving the performance of electronic devices and can also meet the thinning design requirements of electronic devices. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0028] Figure 2 is a schematic diagram of the structure of a camera module in an embodiment of this application when the lens assembly is in an infinite distance state;

[0029] Figure 3 is a schematic diagram of the lens assembly in a macro state in a camera module according to an embodiment of this application;

[0030] Figure 4 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 1 of this application.

[0031] Figure 5 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 1 of this application;

[0032] Figure 6a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 1 of this application;

[0033] Figure 6b is a modulation transfer function curve of a lens assembly in macro mode according to Embodiment 1 of this application;

[0034] Figure 7 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 2 of this application;

[0035] Figure 8 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 2 of this application;

[0036] Figure 9a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 2 of this application;

[0037] Figure 9b is a modulation transfer function curve of a lens assembly in macro mode according to Embodiment 2 of this application;

[0038] Figure 10 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 3 of this application;

[0039] Figure 11 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 3 of this application;

[0040] Figure 12a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 3 of this application;

[0041] Figure 12b is a modulation transfer function curve of a lens assembly in macro mode according to Embodiment 3 of this application;

[0042] Figure 13 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 4 of this application;

[0043] Figure 14 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 4 of this application;

[0044] Figure 15a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 4 of this application;

[0045] Figure 15b is a modulation transfer function curve of a lens assembly in macro mode according to Embodiment 4 of this application;

[0046] Figure 16 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 5 of this application;

[0047] Figure 17 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 5 of this application;

[0048] Figure 18 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 6 of this application;

[0049] Figure 19 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 6 of this application;

[0050] Figure 20 is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 6 of this application;

[0051] Figure 21 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 7 of this application;

[0052] Figure 22 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 7 of this application;

[0053] Figure 23 is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 7 of this application;

[0054] Figure 24 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state, according to Embodiment 8 of this application.

[0055] Figure 25 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 8 of this application;

[0056] Figure 26 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state according to Embodiment 9 of this application.

[0057] Figure 27 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 9 of this application;

[0058] Figure 28 is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 9 of this application;

[0059] Figure 29 is a simulation structure diagram of a camera module in which the lens assembly is in an infinite distance state according to Embodiment 10 of this application.

[0060] Figure 30 is a simulation structure diagram of a camera module lens assembly in a macro state according to Embodiment 10 of this application;

[0061] Figure 31 is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 10 of this application;

[0062] Figure 32 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state, according to Embodiment 11 of this application.

[0063] Figure 33 is a simulation structure diagram of a camera module lens assembly in a macro state provided in Embodiment 11 of this application;

[0064] Figure 34 is a simulation structure diagram of a camera module when the lens assembly is in an infinite distance state, according to Embodiment Twelve of this application.

[0065] Figure 35 is a simulation structure diagram of a camera module lens assembly in macro mode provided in Embodiment 12 of this application.

[0066] Explanation of reference numerals in the attached drawings: 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 Implementation

[0067] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

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

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

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

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

[0072] The imaging surface is located on the image side of all lenses in the lens assembly, and the surface on which light passes through each lens in the lens assembly in sequence to form an image. In the embodiments of this application, the imaging surface may refer to the photosensitive surface of the image sensor.

[0073] Half image height (IMH in this embodiment) refers to half the height of the whole image formed by the lens assembly, which is the maximum radius of the imaging circle.

[0074] Optical power is equal to the difference between the convergence of the image-side beam and the convergence of the object-side beam, and it characterizes the refractive power of a lens for incident parallel beams.

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

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

[0077] The Abbe number, also known as the dispersion coefficient, is the ratio of the difference in 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 stronger its ability to refract incident light. A higher refractive index also means a thinner lens; that is, for lenses of the same thickness at the center, with the same prescription and material, lenses with a higher refractive index will have thinner edges than those 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 angle about a point on the curve with respect 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 usually expressed as effective focal length (EFL) to distinguish it from parameters such as front focal length and back focal length. Focal length or effective focal length is a measure of how well light converges or diverges in an optical system. It refers to the perpendicular distance from the optical center of a lens or lens group to the focal plane when a distant object is focused onto the focal plane. From a practical perspective, it can be understood as the distance from the center of the lens assembly to the image plane.

[0081] Infinity refers to a distance beyond which the subject can be considered as being captured by the lens assembly as a parallel beam of light from an infinitely distant point. When the lens assembly is at infinity (∞), it means that objects at infinity can be clearly imaged when the lens assembly is focused at "∞".

[0082] Macro photography involves capturing images at close range with high magnification. It can produce images that are the same size as or smaller than the actual object. In macro mode, the lens assembly has a magnification of one times or higher, allowing for very close-up shots. The focal length of the lens assembly in macro mode can be less than that in infinity mode, resulting in higher resolution and clearer images of objects.

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

[0084] The aperture number F# is a relative value (the reciprocal of the relative aperture) obtained by dividing the focal length of the lens assembly by the light-gathering diameter (entrance pupil diameter) of the lens assembly. The smaller the F# value, the more light enters in the same unit of time, the shallower 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] Light intake refers to the amount of light that passes through the lens or lens group (i.e., lens assembly) and reaches the photosensitive surface.

[0086] The target surface refers to the photosensitive surface of an image sensor. The larger the target surface, the greater the amount of light the image sensor can capture, and the higher 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 surface of the lens closest to the object side in the lens assembly to the imaging plane. It is a major factor in determining the height of the camera module. In this application, referring to Figure 2, the total track length (TTL) can be the length along the optical axis from the object-side surface of the lens closest to the object side (such as the first lens 11) to the photosensitive surface of the image sensor.

[0088] The modulation transfer function (MTF) is a metric for evaluating the imaging quality of a system.

[0089] This application provides an electronic device, which may include, but is not limited to, mobile phones, tablet personal computers, laptops, cameras, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), wearable devices, virtual reality (VR) devices (such as VR glasses, VR headsets, etc.), augmented reality (AR) devices (such as AR glasses, AR headsets, etc.), in-vehicle devices, surveillance camera equipment, and other electronic devices capable of shooting functions.

[0090] In this embodiment of the application, a mobile phone is taken as an example. The mobile phone can be a candybar phone or a foldable phone. Specifically, the following description will use a candybar phone as an example.

[0091] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0092] Referring to Figure 1, the electronic device 100 may include a housing 120 and a camera module 110. The housing 120 may serve as the main load-bearing structural component of the electronic device 100, and the camera module 110 may be disposed on the housing 120. For example, the housing 120 may have a receiving cavity (not shown in the figure), and the camera module 110 may be assembled on the housing 120 and may be located at least partially within the receiving cavity of the housing 120.

[0093] The camera module 110 is used to realize the shooting function, such as taking photos and recording videos. Its shooting scenarios can include various complex and diverse shooting application scenarios, such as different scenes such as indoor, outdoor, people, and environment.

[0094] The electronic device 100 may also include a display screen (not shown in the figure), which may be fixed to one side of the housing 120. 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, etc.

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

[0096] Alternatively, the camera module 110 can also be a rear-facing camera lens. As shown in Figure 1, the light inlet of the camera module 110 can be located on the back of the electronic device 100 for taking pictures of other objects, and of course, it can also be used for selfies.

[0097] The electronic device 100 may include one camera module 110 or multiple camera modules 110 to meet different shooting needs.

[0098] The electronic device 100 may also include other structural components. For example, continuing to refer to Figure 1, the electronic device 100 may also include a speaker hole 130, which may be formed on the housing 120. The speaker 130 can be used to play audio, etc., from the electronic device 100. A sound output device (not shown in the figure) may also be provided in the accommodating cavity of the housing 120. The sound output device can be used to generate sound and can communicate with the speaker hole 130 so that sound can be propagated through the speaker hole 130.

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

[0100] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. For example, the electronic device 100 may also include devices such as sensors, processors, driving structures, and flashlights.

[0101] A camera module typically includes a lens assembly and an image sensor. Light enters the camera module through the lens assembly; specifically, light reflected from the object being photographed passes through the lens assembly. The lens assembly is used to form an optical image (light signal) of the object. For example, the lens assembly can adjust and control the light path to form an optical image, which is then projected onto the image sensor. The image sensor performs photoelectric conversion, receiving the optical image and converting it into an electrical signal for image display.

[0102] Therefore, the optical performance of the lens assembly has a significant impact on the image quality and effect of the camera module. With the increasing demands for photography on mobile phones and other devices, higher requirements are being placed on the aperture and applicable shooting scenarios of the lens assembly. A large aperture design in the lens assembly can increase the overall light intake, which is beneficial for night scene shooting, background blur, and snapshot functions. Moreover, in low-light or nighttime shooting environments, a large aperture increases the amount of light entering the lens, resulting in better images when shooting distant objects. For close-up shooting scenarios, such as shooting flowers, toys, insects, and other close-up objects, a large aperture lens assembly provides better sharpness and ensures good resolution, thus enabling clear imaging of details.

[0103] Based on this, embodiments of this application provide a lens assembly that employs a two-lens unit architecture and makes the lens unit adjacent to the image side movable, enabling the lens assembly to switch between infinity and macro modes. The lens assembly can achieve both telephoto and macro shooting functions. Furthermore, through reasonable allocation of lens units and lens power, the lens assembly possesses characteristics of large aperture, small size, low cost, and high resolution, satisfying both the high-quality imaging requirements of distant shooting scenarios and the high-magnification and high-resolution macro functions required for close-up shooting scenarios.

[0104] The following description, in conjunction with the accompanying drawings, details the lens assembly and the camera module including the lens assembly provided in the embodiments of this application.

[0105] Figure 2 is a schematic diagram of the structure of a camera module in which the lens assembly is in an infinite distance state according to an embodiment of this application.

[0106] Referring to Figure 2, the camera module 110 may include a lens assembly 10 and an image sensor 20. The image sensor 20 may be located on the image-facing side of the lens assembly 10, that is, the lens assembly 10 may be located between the object being photographed and the image sensor 20. The photosensitive surface (also called the imaging surface) of the image sensor 20 may face the lens assembly 10.

[0107] Light reflected from the object enters the camera module 110, passes through the lens assembly 10, forms an image, and illuminates 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 for output, thereby enabling the camera module 110 to perform functions such as taking pictures or recording videos.

[0108] To ensure the photosensitivity of the image sensor 20, the image sensor 20 can be located inside a cavity within the housing of the electronic device. 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 be located on the side of the image sensor 20 facing away from the display screen.

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

[0110] Referring again to Figure 2, the camera module 110 may also include a filter 30. The filter 30 may be located between the lens assembly 10 and the image sensor 20. With the dotted line L in Figure 2 as the optical axis, the lens assembly 10, the filter 30 and the image sensor 20 are arranged in sequence from the object side to the image side along the direction of the optical axis L. The light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in sequence and then illuminates the photosensitive surface of the image sensor 20.

[0111] The filter 30 has a filtering function, which allows light within a specific wavelength range to pass through, thereby filtering out stray light that is not conducive to imaging and improving image quality.

[0112] The camera module 110 may also include an image processor, memory, etc. (not shown in the figure). The image sensor 20 can transmit the converted electrical signals to the image processor, memory, etc. for processing and then transmit them to the electronic device 100, so that the image of the photographed object can be displayed on 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 detection sensors, drive structures, and circuit boards.

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

[0115] The lens assembly 10 may also include a lens barrel (not shown in the figure), which can serve as the main load-bearing structure of the lens assembly 10. The first lens unit 101 and the second lens unit 102 can be disposed inside the lens barrel, and the optical axis of the lens assembly 10 can coincide with the central axis of the lens barrel. Light-transmitting holes can 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 transmitted through the lens assembly 10 to exit and illuminate the image sensor 20.

[0116] The lens assembly 10 may also include an aperture stop 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 stop 103 may be located closer to the object side. The aperture stop 103 may be fixed inside the lens barrel. For example, the aperture stop 103 may be fixed on the lens (such as the first lens 11) located closest to the object side in the first lens unit 101.

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

[0118] The first lens unit 101 can have multiple lenses, which can be arranged sequentially from the object side to the image side along the optical axis, and the centers of the multiple lenses can 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 power, such as the first lens 11, the second lens 12 and the third lens 13. The first lens 11, the second lens 12 and the third lens 13 are arranged sequentially from the object side to the image side along the optical axis L. That is, the first lens 11 is the lens with optical power that is closest to the object side in the first lens unit 101. The first lens 11 may also be the lens with optical power 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 can also be one, such as the first lens unit 101 may only include the first lens 11.

[0121] Correspondingly, the second lens unit 102 can also have multiple lenses, with multiple lenses arranged sequentially from the object side to the image side along the optical axis, and the centers of the multiple lenses can overlap and be located on the optical axis.

[0122] For example, continuing to refer to Figure 2, the second lens unit 102 may also include three lenses with optical power, such as the fourth lens 14, the fifth lens 15 and the sixth lens 16, which are arranged sequentially from the object side to the image side along the optical axis L. That is, the sixth lens 16 can be the lens with optical power that is closest to the image side in the second lens unit 102. The sixth lens 16 can 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 second lens unit 102 may also have only one lens, such as the second lens unit 102 may only include the sixth lens 16.

[0124] In this embodiment, the first lens unit 101 includes three lenses with optical power, such as the first lens 11, the second lens 12, and the third lens 13, and the second lens unit 102 includes three lenses with optical power, such as the fourth lens 14, the fifth lens 15, and the sixth lens 16. By adopting an architecture with three lenses per lens unit and a total of two lens units, the resulting lens assembly 10 is relatively simple, has a smaller size and lower cost, is more likely to meet the thinning requirements of camera modules and electronic devices, and is easier to produce and promote, thus improving the yield rate of the lens assembly.

[0125] The first lens unit 101 can have positive optical power, and the second lens unit 102 can have negative optical power. Reasonably allocating the optical power of the two lens units, the first lens unit 101 and the second lens unit 102, is conducive to realizing the 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 may have positive optical power, or some of the multiple lenses may have positive optical power and some of the lenses may have negative optical power, so that the first lens unit 101 after the combination of multiple lenses has positive optical power.

[0127] For example, the first lens 11 and the third lens 13 in the first lens unit 101 can each 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 realizing the large aperture design of the lens assembly 10.

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

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

[0130] In this design, the radius of curvature of the object side of the first lens 11 is R11, the radius of curvature 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 condition |(R11+R12) / f1|>2.3. As the lens with optical power closest to the object side in the first lens unit 101 and the second lens unit 102, the first lens 11 is the first lens when light enters the first lens unit 101 and the second lens unit 102. Combining the above two lens unit structures, the first lens unit 101 satisfies the condition, which can more reasonably allocate the optical power 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 the large aperture design of the lens assembly 10.

[0131] To meet the needs of both long-range and close-up shooting scenarios, in this embodiment, the second lens unit 102 can be movably configured, while the first lens unit 101 can be fixedly configured. The movement of the second lens unit 102 enables the lens assembly 10 to switch between infinity and macro states, thereby achieving both telephoto and macro functions. Specifically, the second lens unit 102 can be movably configured along the optical axis L; that is, all the lenses of the second lens unit 102 can move towards or away from the image side along the optical axis L.

[0132] For example, when the lens assembly 10 is at infinity, it has a telephoto function, enabling it to capture distant objects, especially in low-light or nighttime environments, such as landscapes, night scenes, starry skies, the Milky Way, and aurora borealis. Referring to Figure 2, the second lens unit 102 in the lens assembly 10 is positioned closer to the first lens unit 101 and further away from the image sensor 20 and the filter 30. The large aperture design of the lens assembly 10 increases the amount of light entering the lens, improving image quality and effect. Furthermore, the lens assembly 10 can have a long focal length, achieving its telephoto characteristics to meet the needs of distant shooting scenarios and ensure high-quality imaging in such situations.

[0133] Among them, when the lens module 10 is in the infinity 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 module 10 can be 0.75 < f1 / EFL1 < 1. When the lens module 10 has a telephoto characteristic in a long-distance shooting scenario, it ensures that the first lens 11 has a stronger refractive ability, more reasonably distributes the optical power of the first lens 11, further facilitates increasing the aperture design of the lens module 10, and improves the imaging quality and effect of telephoto shooting.

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

[0135] When the lens module 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 module 10 is reduced, the magnification of the lens module 10 is increased, enabling the lens module 10 to achieve the macro function and realizing the switch of the lens module 10 from the infinity state to the macro state.

[0136] When the lens module 10 is in the macro state, the lens module 10 can be used to capture 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 module 10 is closer to the image sensor 20 and the filter 30 and farther from the first lens unit 101. The large aperture design of the lens module 10 can effectively increase the light input amount in the macro state, improve the resolution of the lens module 10, facilitate the realization of the macro shooting function with high magnification and resolution, enable the captured image 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 module 10, and the focusing function of the lens module 10 can also be achieved 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 by the lens driving structure, realizing the switch of the lens module 10 between the infinity state and the macro state.

[0139] In this embodiment of the application, the movement trajectory of the lens in the second lens unit 102 is not limited. For example, the lens of the second lens unit 102 can move linearly along the optical axis, or the lens 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 are no restrictions on the movement of all the lenses in the second lens unit 102. For example, all the lenses in the second lens unit 102 can be treated as a whole, and the lens driving structure can drive the second lens unit 102 as a whole to move along the optical axis.

[0141] Alternatively, there can be multiple lens driving structures. One lens driving structure can be connected and cooperate with some of the lenses in the second lens unit 102. Multiple lens driving structures can drive the corresponding parts of the lenses to move along the optical axis, so that all the lenses in the second lens unit 102 can move along the optical axis.

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

[0143] Correspondingly, when the user turns on the phone's camera function and switches to macro mode, the lens assembly 10 is in macro mode, enabling high-quality shooting of close-up objects. When the user switches from macro mode to telephoto mode, the lens drive structure can move the second lens unit 102 along the optical axis toward the object side, placing the lens assembly 10 at infinity, allowing it to capture high-quality images 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 photo, 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, having the characteristic of a large aperture, ensuring that the lens assembly 10 has a high light input amount, and can better implement the 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 physical length. The range of the magnification Mag of the lens assembly 10 can be 0.15x < Mag < 0.5x, having a high magnification, which can better meet the requirements of the close-up shooting scene, and further improving 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 overall optical length TTL of the lens module 10 can be 0.15 < |EFL2 / TTL| < 0.95. When the lens module 10 has a smaller focal length in the macro state, the overall optical length TTL of the lens module 10 is also 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 infinity 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 infinity 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 infinity 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 embodiments 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 11 is Nd1, and the value of Nd1 can be in the range of 1.4 < Nd1 < 1.85. The first lens 11 has a relatively low refractive index, which can effectively improve the image quality and also facilitate the increase of the aperture of the lens assembly 10, thereby improving the 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 helps to reduce the cost of the lens assembly 10, and have high design flexibility, making it easy to promote and realize production.

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

[0158] The shapes of the lenses 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 manufacture.

[0159] Alternatively, in some other examples, the lens can be circular. For instance, a circular (or elliptical) lens can be cut using an ICUT cutting method, removing the edges of opposite sides of the circular lens to create two opposing arc-shaped sidewalls and two opposing planar sidewalls on the periphery, resulting in an overall circular shape. Compared to a circular lens, this reduces the size of the lens, decreases its space requirements, and facilitates a smaller design for the lens assembly 10 and camera module 110.

[0160] Alternatively, in some other examples, the lens shape can also be square. For instance, a circular (or elliptical) lens can be cut using a SCUT technique, cutting off the peripheral edges of a circular lens to create a square overall shape. The lens's periphery includes four planar sidewalls. This also allows for a reduction in lens size.

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

[0162] In this embodiment, the concave and convex shapes of the image side and object side of each lens in the lens assembly 10 are not limited. The part of the image side of the lens that corresponds at least to the optical axis can be convex or concave. The part of the object side of the lens that corresponds at least to the optical axis can be convex or concave. 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 will be described below with reference to specific embodiments.

[0164] Example 1

[0165] Figure 4 is a schematic diagram of the simulation structure of a camera module when the lens assembly is in an infinite distance state, according to Embodiment 1 of this application.

[0166] In this embodiment of the application, referring to Figure 4, the lens assembly 10 includes six lenses with optical power. The first lens unit 101 may include three lenses with optical power, such as the first lens 11, the second lens 12, and the third lens 13. The second lens unit 102 may include three lenses with optical power, such as the fourth lens 14, the fifth lens 15, and the 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 sequentially.

[0167] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0175] When the lens assembly 10 is at infinity, as shown in Figure 4, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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] Figure 5 is a schematic diagram of the simulation structure of a camera module lens assembly in macro mode according to Embodiment 1 of this application.

[0177] Referring to Figure 5, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0179] When the lens assembly 10 is at infinity, the focal length EFL1 = 14.1, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.83.

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

[0181] The aperture number F#1 of lens assembly 10 at infinity is 2.03. The aperture number F#2 of lens assembly 10 in macro mode is 2.02.

[0182] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.43.

[0185] When the lens assembly 10 is in macro mode, the focal length EFL2 = 8.46, the total optical length TTL of the lens assembly 10 = 14.72, and the ratio of the focal length EFL2 to the total optical length TTL of the lens assembly 10 in macro mode, |EFL2 / TTL| = 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 optical parameters of each lens in this embodiment are illustrated below.

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

[0189] Wherein, 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 aperture stop 103, S1 and S2 are the object side and image side of the first lens 11, respectively, S3 and S4 are the object side and image side of the second lens 12, respectively, S5 and S6 are the object side and image side of the third lens 13, respectively, S7 and S8 are the object side and image side of the fourth lens 14, respectively, S9 and S10 are the object side and image side of the fifth lens 15, respectively, S11 and S12 are the object side and image side of the sixth lens 16, and S13 and S14 are the object side and image side of the filter 30.

[0191] The thickness refers to the thickness of the optical element along the optical axis or the thickness of the air gap between the optical elements. The thickness corresponding to the row containing aperture 103 is the distance from 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 refractive index and Abbe number. The refractive index of the lens is the product of the first 0.000 and 1.000, and the Abbe number is the product of the last 0.000 and 0.01. For example, taking the first lens 11 (L1) as an example, the material value of the first lens 11 is 547.528, therefore the refractive index of the first lens 11 is 1.547, and the Abbe number of the first lens 11 is 52.8, and so on.

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

[0194] Table 1.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 1 of this application.

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

[0196] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0197] Table 1.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 1 of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment 1 of this application.

[0201] As shown in Table 1.4, the lens assembly 10 provided in Embodiment 1 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0202] Figure 6a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 1 of this application, and Figure 6b is a modulation transfer function curve of a lens assembly in a macro state according to Embodiment 1 of this application.

[0203] In Figures 6a and 6b, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line represents the sagittal field of view, the dashed line represents the meridional field of view, and the diff.limit represents the modulation transfer function of the imaging system for infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figures 6a and 6b, the lens assembly provided in this embodiment can achieve high-quality imaging in both infinity and macro states.

[0204] Example 2

[0205] Figure 7 is a schematic diagram of the simulation structure of a camera module when the lens assembly is in an infinite distance state, according to Embodiment 2 of this application.

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

[0207] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0215] When the lens assembly 10 is at infinity, as shown in Figure 7, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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] Figure 8 is a schematic diagram of the simulation structure of a camera module lens assembly in macro mode according to Embodiment 2 of this application.

[0217] Referring to Figure 8, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0219] When the lens assembly 10 is at infinity, the focal length EFL1 = 15.2, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.85.

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

[0221] The aperture number F#1 of lens assembly 10 at infinity is 1.98. The aperture number F#2 of lens assembly 10 in macro mode is 1.96.

[0222] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.53.

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

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

[0227] The optical parameters of each lens in this embodiment are illustrated below.

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

[0229] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0231] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0232] Table 2.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 2 of this application.

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

[0234] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0235] Table 2.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 2 of this 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] By adopting the above-mentioned two lens unit structure and by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 2.4 below.

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

[0239] As shown in Table 2.4, the lens assembly 10 provided in Embodiment 2 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0240] Figure 9a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 2 of this application, and Figure 9b is a modulation transfer function curve of a lens assembly in a macro state according to Embodiment 2 of this application.

[0241] In Figures 9a and 9b, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line represents the sagittal field of view, the dashed line represents the meridional field of view, and the diff.limit represents the modulation transfer function of the imaging system for infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figures 9a and 9b, the lens assembly provided in this embodiment can achieve high-quality imaging in both infinity and macro states.

[0242] Example 3

[0243] Figure 10 is a schematic diagram of the simulation structure of a camera module when the lens assembly is in an infinite distance state, according to Embodiment 3 of this application.

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

[0245] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0253] When the lens assembly 10 is at infinity, as shown in Figure 10, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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] Figure 11 is a schematic diagram of the simulation structure of a camera module lens assembly in macro mode according to Embodiment 3 of this application.

[0255] Referring to Figure 11, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0257] When the lens assembly 10 is at infinity, the focal length EFL1 = 15.1, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.88.

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

[0259] The aperture number F#1 of lens assembly 10 at infinity is 1.98. The aperture number F#2 of lens assembly 10 in macro mode is 2.03.

[0260] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.61.

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

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

[0265] The optical parameters of each lens in this embodiment are illustrated below.

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

[0267] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0269] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0270] Table 3.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 3 of this application.

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

[0272] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0273] Table 3.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 3 of this 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] By adopting the above-mentioned two lens unit structure and by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 3.4 below.

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

[0277] As shown in Table 3.4, the lens assembly 10 provided in Embodiment 3 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0278] Figure 12a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 3 of this application, and Figure 12b is a modulation transfer function curve of a lens assembly in a macro state according to Embodiment 3 of this application.

[0279] In Figures 12a and 12b, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line represents the sagittal field of view, the dashed line represents the meridional field of view, and the diff.limit represents the modulation transfer function of the imaging system for infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figures 12a and 12b, the lens assembly provided in this embodiment can achieve high-quality imaging in both infinity and macro states.

[0280] Example 4

[0281] Figure 13 is a schematic diagram of the simulation structure of a camera module when the lens assembly is in an infinite distance state, according to Embodiment 4 of this application.

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

[0283] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0291] When the lens assembly 10 is at infinity, as shown in Figure 13, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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] Figure 14 is a simulation structure diagram of a camera module lens assembly in macro mode according to Embodiment 4 of this application.

[0293] Referring to Figure 14, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0295] When the lens assembly 10 is at infinity, the focal length EFL1 = 15.2, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.99.

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

[0297] The aperture number F#1 of lens assembly 10 at infinity is 1.98. The aperture number F#2 of lens assembly 10 in macro mode is 2.03.

[0298] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.66.

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

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

[0303] The optical parameters of each lens in this embodiment are illustrated below.

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

[0305] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0307] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0308] Table 4.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 4 of this application.

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

[0310] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0311] Table 4.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 4 of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment 4 of this application.

[0315] In this embodiment, the half-image height of the lens assembly 10 in the infinity state can be different from the half-image height of the lens assembly 10 in the macro state, so as to meet the imaging quality requirements.

[0316] As shown in Table 4.4, the lens assembly 10 provided in Embodiment 4 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0317] Figure 15a is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 4 of this application, and Figure 15b is a modulation transfer function curve of a lens assembly in a macro state according to Embodiment 4 of this application.

[0318] In Figures 15a and 15b, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line represents the sagittal field of view, the dashed line represents the meridional field of view, and the diff.limit represents the modulation transfer function of the imaging system for infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figures 15a and 15b, the lens assembly provided in this embodiment can achieve high-quality imaging in both infinity and macro states.

[0319] Example 5

[0320] Figure 16 is a schematic diagram of the simulation structure of a camera module when the lens assembly is in an infinite distance state, according to Embodiment 5 of this application.

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

[0322] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0330] When the lens assembly 10 is at infinity, as shown in Figure 16, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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] Figure 17 is a simulation structure diagram of a camera module lens assembly in macro mode according to Embodiment 5 of this application.

[0332] Referring to Figure 17, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0334] When the lens assembly 10 is at infinity, the focal length EFL1 = 15.2, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.99.

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

[0336] The aperture number F#1 of lens assembly 10 at infinity is 1.98. The aperture number F#2 of lens assembly 10 in macro mode is 2.02.

[0337] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.66.

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

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

[0342] The optical parameters of each lens in this embodiment are illustrated below.

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

[0344] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0346] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0347] Table 5.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 5 of this application.

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

[0349] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0350] Table 5.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 5 of this 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] By adopting the above-mentioned two lens unit structure and by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 5.4 below.

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

[0354] As shown in Table 5.4, the lens assembly 10 provided in Embodiment 5 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0355] Example 6

[0356] Figure 18 is a simulation structure diagram of a camera module in which the lens assembly is in an infinite distance state, according to Embodiment 6 of this application.

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

[0358] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0366] When the lens assembly 10 is at infinity, as shown in Figure 18, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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 camera module lens assembly in macro mode according to Embodiment 6 of this application.

[0368] Referring to Figure 19, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0370] When the lens assembly 10 is at infinity, the focal length EFL1 = 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 at infinity is f1 / EFL1 = 0.94.

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

[0372] The aperture number F#1 of lens assembly 10 at infinity is 1.98. The aperture number F#2 of lens assembly 10 in macro mode is 2.02.

[0373] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.68.

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

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

[0378] The optical parameters of each lens in this embodiment are illustrated below.

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

[0380] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0382] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0383] Table 6.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 6 of this application.

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

[0385] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0386] Table 6.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 6 of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment Six of this application.

[0390] As shown in Table 6.4, the lens assembly 10 provided in Embodiment 6 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0391] Figure 20 is a modulation transfer function curve of a lens assembly in an infinitely distant state according to Embodiment 6 of this application.

[0392] In Figure 20, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dashed 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 infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figure 20, 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 camera module in embodiment seven of this application when the lens assembly is in an infinite distance state.

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

[0396] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0404] When the lens assembly 10 is at infinity, as shown in Figure 21, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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 camera module lens assembly in macro mode according to Embodiment 7 of this application.

[0406] Referring to Figure 22, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0408] When the lens assembly 10 is at infinity, the focal length EFL1 = 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 at infinity is f1 / EFL1 = 0.87.

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

[0410] The aperture number F#1 of lens assembly 10 at infinity is 1.98. The aperture number F#2 of lens assembly 10 in macro mode is 2.02.

[0411] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.69.

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

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

[0416] The optical parameters of each lens in this embodiment are illustrated below.

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

[0418] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0420] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0421] Table 7.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 7 of this application.

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

[0423] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0424] Table 7.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 7 of this 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] By adopting the above-mentioned two lens unit structure and reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 7.4 below.

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

[0428] As shown in Table 7.4, the lens assembly 10 provided in Embodiment 7 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0429] Figure 23 is a modulation transfer function curve of a lens assembly in an infinitely far state according to Embodiment 7 of this application.

[0430] In Figure 23, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dashed 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 infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figure 23, the lens assembly provided in this embodiment can achieve high-quality imaging.

[0431] Example 8

[0432] Figure 24 is a simulation structure diagram of a camera module in embodiment eight of this application when the lens assembly is in an infinite distance state.

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

[0434] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0442] When the lens assembly 10 is at infinity, as shown in Figure 24, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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 camera module lens assembly in macro mode according to Embodiment 8 of this application.

[0444] Referring to Figure 25, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0446] When the lens assembly 10 is at infinity, the focal length EFL1 = 15.3, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.98.

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

[0448] The aperture number F#1 of lens assembly 10 at infinity is 1.77. The aperture number F#2 of lens assembly 10 in macro mode is 1.82.

[0449] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.57.

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

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

[0454] The optical parameters of each lens in this embodiment are illustrated below.

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

[0456] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0458] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0459] Table 8.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 8 of this application.

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

[0461] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0462] Table 8.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 8 of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment 8 of this application.

[0466] As shown in Table 8.4, the lens assembly 10 provided in Embodiment 8 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0467] Example 9

[0468] Figure 26 is a schematic diagram of the simulation structure of a camera module in embodiment nine of this application when the lens assembly is in an infinite distance state.

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

[0470] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0478] When the lens assembly 10 is at infinity, as shown in Figure 26, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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 camera module lens assembly in macro mode according to Embodiment 9 of this application.

[0480] Referring to Figure 27, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0482] When the lens assembly 10 is at infinity, the focal length EFL1 = 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 at infinity is f1 / EFL1 = 0.88.

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

[0484] The aperture number F#1 of lens assembly 10 at infinity is 1.69. The aperture number F#2 of lens assembly 10 in macro mode is 1.72.

[0485] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.58.

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

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

[0490] The optical parameters of each lens in this embodiment are illustrated below.

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

[0492] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0494] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0495] Table 9.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 9 of this application.

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

[0497] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0498] Table 9.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 9 of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment 9 of this application.

[0502] As shown in Table 9.4, the lens assembly 10 provided in Embodiment 9 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0503] Figure 28 is a modulation transfer function curve of a lens assembly in an infinite distance state according to Embodiment 9 of this application.

[0504] In Figure 28, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dashed 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 infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figure 28, the lens assembly provided in this embodiment can achieve high-quality imaging.

[0505] Example 10

[0506] Figure 29 is a simulation structure diagram of a camera module in which the lens assembly is in an infinite distance state, according to Embodiment 10 of this application.

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

[0508] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0516] When the lens assembly 10 is at infinity, as shown in Figure 29, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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 simulation structure diagram of the lens assembly in a camera module in macro mode according to Embodiment 10 of this application.

[0518] Referring to Figure 30, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0520] When the lens assembly 10 is at infinity, the focal length EFL1 = 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 at infinity is f1 / EFL1 = 0.81.

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

[0522] The aperture number F#1 of lens assembly 10 at infinity is 1.58. The aperture number F#2 of lens assembly 10 in macro mode is 1.54.

[0523] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.67.

[0526] When the lens assembly 10 is in macro mode, the focal length EFL2 = 9.48, the total optical length TTL of the lens assembly 10 = 18.5, and the ratio of the focal length EFL2 to the total optical length TTL of the lens assembly 10 in macro mode, |EFL2 / TTL| = 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 optical parameters of each lens in this embodiment are illustrated below.

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

[0530] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0532] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0533] Table 10.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 10 of this application.

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

[0535] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0536] Table 10.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 10 of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment 10 of this application.

[0540] As shown in Table 10.4, the lens assembly 10 provided in Embodiment 10 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0541] Figure 31 is a modulation transfer function curve of a lens assembly in an infinitely distant state according to Embodiment 10 of this application.

[0542] In Figure 31, the horizontal axis represents different frequencies, the vertical axis represents modulation contrast, the solid line in the figure represents the sagittal field of view, the dashed 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 infinitesimal points. The closer to the diff.limit curve, the better the imaging quality. As can be seen from Figure 31, 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 camera module when the lens assembly is in an infinite distance state, according to Embodiment 11 of this application.

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

[0546] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0554] When the lens assembly 10 is at infinity, as shown in Figure 32, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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 camera module lens assembly in macro mode according to Embodiment 11 of this application.

[0556] Referring to Figure 33, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0558] When the lens assembly 10 is at infinity, the focal length EFL1 = 15.05, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.98.

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

[0560] The aperture number F#1 of lens assembly 10 at infinity is 1.48. The aperture number F#2 of lens assembly 10 in macro mode is 1.46.

[0561] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.59.

[0564] When the lens assembly 10 is in macro mode, the focal length EFL2 = 9.53, the total optical length TTL of the lens assembly 10 = 17.94, and the ratio of the focal length EFL2 to the total optical length TTL of the lens assembly 10 in macro mode, |EFL2 / TTL| = 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 optical parameters of each lens in this embodiment are illustrated below.

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

[0568] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0570] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0571] Table 11.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment 11 of this application.

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

[0573] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0574] Table 11.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment 11 of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment 11 of this application.

[0578] As shown in Table 11.4, the lens assembly 10 provided in Embodiment 11 of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0579] Example 12

[0580] Figure 34 is a schematic diagram of the simulation structure of a camera module when the lens assembly is in an infinite distance state, according to Embodiment Twelve of this application.

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

[0582] In other words, along the optical axis L, from the object side to the image side, the camera module 110 contains, in sequence, an aperture 103, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a filter 30, and an image sensor 20. Light entering the camera module 110 passes through the lens assembly 10 and the filter 30 in the aforementioned order and illuminates 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 optical power, and the second lens unit 102 has negative optical power.

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

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

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

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

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

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

[0590] When the lens assembly 10 is at infinity, as shown in Figure 34, the second lens unit 102 is closer to the first lens unit 101, while the distance between it and the filter 30 and the image sensor 20 is relatively far. 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 simulation structure diagram of a camera module lens assembly in macro mode provided in Embodiment 12 of this application.

[0592] Referring to Figure 35, when the lens assembly 10 is in macro mode, the second lens 12 is closer to the filter 30 and the image sensor 20, while the distance between it and the first lens unit 101 is relatively far.

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

[0594] When the lens assembly 10 is at infinity, the focal length EFL1 = 15.35, and the ratio of the focal length f1 of the first lens element 11 to the focal length EFL1 of the lens assembly 10 at infinity is f1 / EFL1 = 0.95.

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

[0596] The aperture number F#1 of lens assembly 10 at infinity is 1.88. The aperture number F#2 of lens assembly 10 in macro mode is 1.85.

[0597] The magnification of lens assembly 10 in macro mode 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 when it is 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 when it is at infinity is |G2 / EFL1| = 0.56.

[0600] When the lens assembly 10 is in macro mode, the focal length EFL2 = 7.34, the total optical length TTL of the lens assembly 10 = 18.9, and the ratio of the focal length EFL2 to the total optical length TTL of the lens assembly 10 in macro mode, |EFL2 / TTL| = 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 optical parameters of each lens in this embodiment are illustrated below.

[0603] Table 12.1 shows the optical parameters of each lens in a camera module provided in Embodiment Twelve of this application.

[0604] Wherein, 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] For a detailed illustration of S0-S14, please refer to Embodiment 1, which will not be repeated in the embodiment.

[0606] The significance of parameters such as radius of curvature, thickness, material, and Y-semi-aperture can also be found in Example 1, and will not be repeated in this example.

[0607] Table 12.2 shows the aspherical coefficients of each lens element in a lens assembly provided in Embodiment Twelve of this application.

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

[0609] Wherein, 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 aspherical sag of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspherical coefficient term, i is 30 in this embodiment, and Ai is the aspherical coefficient.

[0610] Table 12.3 shows the focal length of each lens and lens unit in a lens assembly provided in Embodiment Twelve of this 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 by reasonably allocating the optical power of the two lens units and the first lens, the lens assembly 10 can achieve features such as large aperture, small size, low cost and high resolution by matching the number of lenses and 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 Embodiment Twelve of this application.

[0614] As shown in Table 12.4, the lens assembly 10 provided in Embodiment Twelve of this application has the characteristics of large aperture and small optical length, which can realize the telephoto shooting function, ensuring high-quality imaging in scenarios such as distant shooting, and can also realize the macro function with high magnification and resolution, ensuring high-definition imaging in scenarios such as close shooting.

[0615] It should be noted that the numerical values ​​and ranges involved in the embodiments of this application are approximate values ​​and may have a certain range of errors, which can be considered negligible by those skilled in the art.

[0616] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) 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 this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lens assembly, characterized in that, At least including 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 powers, 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, and the second lens unit moves along the optical axis toward the image side to switch the lens assembly from an infinite far 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 one 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; 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.

2. The lens assembly according to claim 1, characterized in that, The aperture number F#1 of the lens assembly in the infinite far 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 1-3, 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 1-4, 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 1-5, 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 1-6, 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 1-7, 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 1-8, 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 1-10, characterized in that, The shape of the lens at least includes one or more combinations of circular, oval, racetrack circular, square, etc.

12. The lens assembly according to any one of claims 1-11, 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, At least including an image sensor and the lens assembly according to any one of claims 1 - 12 above, and the image sensor is located on one side of the lens assembly facing the image side.

14. An electronic device, characterized in that, It includes at least a housing and the camera module as described in claim 13, wherein the camera module is disposed on the housing.

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