Lens assembly, camera module, and electronic device

Abstract

Embodiments of the present application provide a lens assembly, a camera module, and an electronic device. The lens assembly comprises two lens units. A first lens unit close to an object side is movably arranged to achieve switching of the lens assembly between a working state and a non-working state. When the lens assembly is in the working state, the lens assembly can achieve high-quality imaging in which both a large aperture and a large target surface are realized. When the lens assembly switches to the non-working state, the distance between the two lens units can be reduced to decrease the length of the lens assembly and the total optical length, achieving thinning of the lens assembly and the camera module, that is, the lens assembly not only can ensure high imaging quality in the working state, but also can achieve miniaturization in the non-working state. Moreover, there is a large distance between the two lens units, so that the lens assembly and the camera module can be thinned more significantly in the non-working state to obtain an ultrathin camera module, thereby better meeting the thinning requirement of the electronic device.

Description

Lens assemblies, camera modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 31, 2023, with application number 202310962515.9 and application name “Lens assembly, camera module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

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

[0004] At present, camera modules usually include a lens assembly and an image sensor. The lens assembly is usually formed by multiple lens elements arranged in sequence along the optical axis. Light is formed by the lens assembly and then projected onto the image sensor to achieve the conversion of optical images into electrical signals. Therefore, the performance of the lens assembly directly determines the imaging performance of the camera module. With the increasing demand for shooting, in order to increase the amount of light entering the entire imaging system, the imaging lens is gradually developing towards a large aperture and high-quality imaging with a large target surface. However, for optical lenses, increasing the aperture and target surface often leads to an increase in the size of the lens assembly. For example, the increase in the length of the lens assembly itself and the total optical length leads to a larger thickness of the entire camera module, which is not conducive to the miniaturization and ultra-thin development of electronic equipment. The total optical length has become a bottleneck restricting the design of high-quality imaging of large-target-surface and large-aperture lenses. Therefore, there is an urgent need for a lens assembly that can meet the requirements of high imaging quality and thinning design.

[0005] Summary of the Invention

[0006] The present application provides a lens assembly, a camera module and an electronic device. When the lens assembly is in a working state, it can achieve a large aperture and a large target surface characteristic to achieve high-quality imaging. When the lens assembly is in a non-working state, it has a smaller total optical length, which can achieve an extremely ultra-thin camera module and meet the thinning design requirements of electronic devices.

[0007] A first aspect of the present application provides a lens assembly comprising at least a first lens unit and a second lens unit arranged sequentially along an optical axis from the object side to the image side, wherein the first lens unit and the second lens unit each include a lens having a focal length, and the first lens unit comprises a plurality of lenses. By forming the lens assembly with the two lens units, and by properly allocating the number of lenses and the structural layout, a large aperture and a large target surface can be achieved for the lens assembly, resulting in excellent optical quality and significantly improved imaging quality and effects.

[0008] The lens assembly can include a working state and a non-working state. The first lens unit is movably arranged along the optical axis, and all lenses of the first lens unit are moved along the optical axis toward the second lens unit to switch the lens assembly from the working state to the non-working state.

[0009] When the lens assembly is in working state, the lens assembly satisfies the conditional formula IMH / F#>4.0, where IMH is the half-image height of the lens assembly and F# is the aperture number of the lens assembly. This ensures that the lens assembly has a larger half-image height and a smaller aperture number, so that the lens assembly can have both large aperture and large target surface characteristics when in working state, and has high imaging quality, thereby achieving high-quality imaging with a large target surface and a large aperture of the lens assembly.

[0010] When the lens assembly switches from a working state to a non-working state, all the lenses of the first lens unit move toward the second lens, compressing the distance between the first lens unit and the second lens unit, thereby shortening the length of the lens assembly and the total optical length. When the lens assembly is in a non-working state, it has a smaller length and total optical length, which is conducive to reducing the thickness of the camera module, thereby meeting the thinning design requirements of electronic equipment.

[0011] In summary, the movement of the first lens unit enables the lens assembly to switch between an operating state and a non-operating state. When the lens assembly is in the operating state, the spacing between the two lens units can be released, that is, the total optical length of the lens assembly can be released, so that the lens assembly has a small aperture number and a large half-image height, achieving the characteristics of a large aperture and a large target surface of the lens assembly, improving the imaging quality and effect, and facilitating the realization of a telephoto function. When the lens assembly is in the non-operating state, the spacing between the two lens units can be compressed, achieving compression of the length of the lens assembly and the total optical length, reducing the thickness of the lens assembly and the camera module, thereby meeting the requirements of the thinning design of electronic devices. In other words, the lens assembly can ensure miniaturization and thinning in the non-operating state, while taking into account the large aperture, large target surface and telephoto functional characteristics in the operating state, thereby ensuring imaging quality.

[0012] Among them, when the lens module is in the working state, the lens module also satisfies the conditional expression 0.2 < GD / TTL < 0.5, where GD is the distance between the first lens unit and the second lens unit on the optical axis, and TTL is the total optical length of the lens module. When the total optical length is fixed, a relatively large distance GD between the first lens unit and the second lens unit facilitates the implementation of the optical path, so as to ensure that the lens module can achieve high-quality imaging with a large aperture and a large target surface design when in the working state. Moreover, when switching the lens module to the non-working state by moving the first lens unit, the compressed long distance can make the lens module have a smaller length and total optical length when in the non-working state, significantly reducing the length dimension of the lens module and the camera module when in the non-working state, making the thinning of the camera module in the non-working state obvious, so as to obtain an extremely thin camera module in the non-working state, which is more conducive to meeting the thinning requirements of electronic devices.

[0013] In addition, when the lens module is in the working state, the focal length of the lens module can be adjusted by moving all the lenses in the first lens unit or at least one lens near the image side in the first lens unit along the optical axis, so as to achieve functions such as focusing or zooming. Having a relatively large distance GD between the first lens unit and the second lens unit can also expand the movable range of all or part of the lenses near the image side of the first lens unit, improving the operation flexibility of focusing or zooming, and better facilitating the realization of functions such as focusing or zooming, thereby further improving the imaging quality and effect.

[0014] In a possible implementation manner, when the lens module is in the working state, the aperture number of the lens module satisfies: 1.1 < F# < 2. The aperture number is small, ensuring that the lens module has the characteristics of a large aperture and significantly improving the imaging quality and effect.

[0015] In a possible implementation manner, when the lens module is in the working state, the lens module also satisfies the conditional expression: 0.20 < GD / EFL < 0.60, where EFL is the focal length of the lens module. The lens module has a long focal length and a distance GD, which is conducive to further achieving high-quality imaging under the large target surface design of the lens module, and making the distance between the first lens unit and the second lens unit relatively large, further facilitating the significant thinning of the lens module in the non-working state.

[0016] In a possible implementation manner, when the lens module is in the working state, the lens module also satisfies the conditional expression: 0.9 < EFL1 / EFL < 1.1, where EFL1 is the focal length of the first lens unit. The optical power of the first lens unit is reasonably distributed, making the first lens unit have a relatively large refractive power, ensuring the imaging quality and effect of the lens module.

[0017] In a possible implementation, when the lens assembly is in the working state, the lens assembly further satisfies the conditional formula: IMH / TTL < 0.7, making the semi-image height and the overall optical length of the lens assembly relatively large, further ensuring that the lens assembly has the characteristic of a large target surface, and also facilitating the lens assembly to achieve the telephoto function.

[0018] In a possible implementation, when the lens assembly is in the working state, the lens assembly further satisfies the conditional formula: 0.6 < EFL / TTL < 0.9. When in the working state, the overall optical length of the lens assembly is relatively large, which also makes the focal length and the overall optical length of the lens assembly relatively large, facilitating the lens assembly to achieve the characteristics of a large aperture, a large target surface and a telephoto, and being beneficial to further improving the imaging quality and effect.

[0019] In a possible implementation, when the lens assembly is in the working state, the lens assembly further satisfies the conditional formula: EFL * tan(HFOV) ≥ 8.00 mm, where HFOV is the semi-field angle of the lens assembly. Ensuring that the lens assembly has a relatively large imaging range and the lens assembly imaging has a relatively large image height, further ensuring that the lens assembly can achieve a large target surface design and improving the imaging quality and effect of the lens assembly.

[0020] In a possible implementation, the number of lenses in the first lens unit is greater than or equal to 4. Reasonably distributing the number of lenses in the first lens unit ensures the refractive power of the first lens unit, is beneficial to achieving the large aperture and large target surface design of the lens assembly, and ensures the imaging quality and effect.

[0021] In a possible implementation, the number of lenses in the second lens unit is less than or equal to 3. Under the condition of ensuring the imaging quality and effect of the lens assembly, it is beneficial to reduce the length and the overall optical length of the lens assembly, further facilitating the thinning of the lens assembly and the camera module, and also being able to reduce the architecture design complexity and cost of the lens assembly and being easy to implement.

[0022] In a possible implementation, it further includes an aperture. The aperture is located on the object side of the first lens unit, and the aperture is a variable aperture with a variable diameter, enabling the lens assembly to provide different depth-of-field ranges for different shooting scenes, so as to be able to take into account the shooting requirements of multiple scenes.

[0023] In a possible implementation, the lenses of the first lens unit include a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and the lenses of the second lens unit include a sixth lens and a seventh lens. The first lens, the fifth lens and the sixth lens respectively have positive optical powers, and the second lens, the fourth lens and the seventh lens respectively have negative optical powers. By reasonably distributing the optical powers of each lens, it is beneficial to achieve the large aperture and large target surface design of the lens assembly when in the working state.

[0024] In one possible implementation, at least one of the object side and image side surfaces of the sixth lens is a complex surface, and at least one of the object side and image side surfaces of the seventh lens is a complex surface, which can adjust the incident angle of light on the image sensor, further facilitate the realization of a large target surface design, and enhance the sensitivity of the second lens unit, which is conducive to further improving the imaging quality and effect of the lens assembly.

[0025] The second aspect of the present application provides a camera module, comprising at least an image sensor and any one of the above-mentioned lens assemblies, wherein the image sensor is located on the side of the lens assembly facing the image side. By including the lens assembly, the lens assembly can not only ensure miniaturization and thinning in a non-working state, but also take into account the large aperture, large target surface and long-focus functional characteristics in a working state, thereby ensuring imaging quality, so that the camera module can achieve large aperture, large target surface and long-focus functions while meeting the requirements of thinning electronic devices. Moreover, through a single camera module, the performance of the main camera module and the long-focus module can be taken into account while maintaining high camera quality, thereby facilitating the optimization of the spatial layout of electronic devices, reducing the cost of the camera module of electronic devices, and improving the performance and experience of electronic devices.

[0026] A third aspect of the present application provides an electronic device, comprising at least a housing and the above-mentioned camera module, wherein the camera module is arranged on the housing.

[0027] When the lens assembly is in working state, the first lens unit of the lens assembly is at least partially located outside the housing, so as to release the degree of freedom of the total optical length required by the lens assembly in working state, realize high-quality imaging with large aperture and large target surface, and reduce the total optical length of the lens assembly and the influence of the length on the thickness of the electronic device, which is conducive to the thinning design of the electronic device while ensuring the high shooting performance of the electronic device.

[0028] When the lens assembly switches from a working state to a non-working state, the first lens unit moves along the optical axis toward the inside of the housing, compressing the distance between the first lens unit and the second lens unit, significantly reducing the length of the camera module in the non-working state. The ultra-thin camera module occupies less space in the electronic device. When the lens assembly is in a non-working state, even if the entire camera module is placed in the electronic device, it will not cause a significant restriction on the thickness design of the electronic device, thereby facilitating the thinning of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0030] FIG2 is a schematic structural diagram of a lens assembly in a camera module provided by an embodiment of the present application when in a working state;

[0031] FIG3 is a structural diagram of a lens assembly in a camera module provided by an embodiment of the present application when in a non-working state;

[0032] FIG4 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 1 of the present application when in a working state;

[0033] FIG5 is a modulation transfer function curve diagram of a camera module provided in Example 1 of the present application;

[0034] FIG6 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in Example 2 of the present application when in a working state;

[0035] FIG7 is a modulation transfer function curve diagram of a camera module provided in Example 2 of the present application;

[0036] FIG8 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in Example 3 of the present application when in a working state;

[0037] FIG9 is a modulation transfer function curve diagram of a camera module provided in Example 3 of the present application;

[0038] FIG10 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in a fourth embodiment of the present application when in a working state;

[0039] FIG11 is a modulation transfer function curve diagram of a camera module provided in Example 4 of the present application;

[0040] FIG12 is a schematic diagram of a simulated structure of a lens assembly in a camera module provided in a fifth embodiment of the present application when in a working state;

[0041] FIG13 is a modulation transfer function curve diagram of a camera module provided in Example 5 of the present application;

[0042] FIG14 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 6 of the present application when in a working state;

[0043] FIG15 is a modulation transfer function curve diagram of a camera module provided in Example 6 of the present application.

[0044] Explanation of the accompanying reference numerals: 100 - electronic device; 101 - camera module; 10 - lens assembly; 110 - first lens unit; 11 - first lens; 12 - second lens; 13 - third lens; 14 - fourth lens; 15 - fifth lens; 120 - second lens unit; 16 - sixth lens; 17 - seventh lens; 130 - aperture; 20 - image sensor; 30 - filter; 102 - housing; 103 - horn; 104 - data interface. DETAILED DESCRIPTION

[0045] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0046] To facilitate understanding, the relevant technical terms involved in the embodiments of this application are first explained and illustrated.

[0047] The object side, with the lens assembly as the boundary, the side where the object is located is the object side, and the side of the lens or optical element facing the object side is the object side surface.

[0048] The image side, with the lens assembly as the boundary, is the side where the image of the object is located, and the side of the lens or optical element facing the image side is the image side.

[0049] The optical axis refers to the light passing through the center of each lens element of the lens assembly (refer to the imaginary axis L in Figure 2).

[0050] The imaging plane is located on the image side of all the lenses in the lens assembly and is the carrier surface on which the image is formed after the light passes through each lens in the lens assembly in sequence. In the embodiment of the present application, the imaging plane may refer to the photosensitive surface of the image sensor.

[0051] Half of image height (abbreviated as IMH in the embodiments of the present application) refers to half of the full image height of the image formed by the lens assembly, which is the maximum radius of the imaging circle.

[0052] The optical power is equal to the difference between the convergence of the image side light beam and the convergence of the object side light beam, which represents the refractive ability of the lens to the incident parallel light beam.

[0053] Positive optical power means that the lens has a positive focal length and has the effect of converging light.

[0054] Negative optical power means that the lens has a negative focal length and has the effect of diverging light.

[0055] The Abbe number, also known as the dispersion coefficient, refers to the difference ratio of the refractive index of an optical material at different wavelengths, indicating the degree of dispersion of the material.

[0056] Refractive index is the ratio of the speed of light in a vacuum (air) to the speed of light in the lens material. The higher the refractive index of a lens, the greater its ability to refract incident light. The higher the refractive index, the thinner the lens. That is, for lenses with the same center thickness, the same prescription, and the same material, a lens with a higher refractive index will be thinner at the edges than a lens with a lower refractive index.

[0057] The radius of curvature is the reciprocal of the curvature. The curvature of a plane curve is the rate of rotation of the tangent direction angle at a point on the curve to the arc length. It is defined by differentiation and indicates the degree to which the curve deviates from a straight line.

[0058] Focal length, also known as focal length, is often expressed as effective focal length (EFL), distinguishing it from parameters such as front focal length and back focal length. Focal length, or effective focal length, is a measure of light convergence or divergence in an optical system. It refers to the vertical distance from the optical center of a lens or lens assembly to the focal plane, when a sharp image of an object at infinite distance is formed through the lens or lens assembly. From a practical perspective, it can be understood as the distance from the center of the lens assembly to the imaging plane.

[0059] The aperture is a device used to control the amount of light that passes through the lens or lens group and enters the photosensitive surface of the camera module. It is usually fixed inside the camera module. The aperture size can be expressed by the F# value.

[0060] The aperture number F# is a relative value (the inverse of the relative aperture) obtained by dividing the focal length of the lens assembly by the diameter of the lens assembly (entrance pupil diameter). The smaller the F# value, the more light enters in the same unit time, the smaller the depth of field, and the background content of the photo will be blurred, producing an effect similar to that of a telephoto lens.

[0061] The amount of light entering refers to how much light passes through the lens or lens group (also known as the lens assembly) and illuminates the photosensitive surface.

[0062] The target surface refers to the photosensitive surface of the image sensor. The larger the target surface, the greater the sensitivity of the image sensor and the greater the image height.

[0063] Total track length (TTL), also known as total height or total length, refers to the total length along the optical axis from the object side of the lens element closest to the object side to the imaging plane in the lens assembly. It is a major factor in determining the height of the camera module. In the embodiment of the present application, as shown in Figure 2, the total track length (TTL) can be the length along the optical axis from the object side of the lens element closest to the object side (e.g., the first lens element) to the photosensitive surface of the image sensor.

[0064] The length of the lens assembly is the actual length (or mechanical length) of the lens assembly on the optical axis, that is, the length along the optical axis from the object side surface of the lens element closest to the object side to the image side surface of the lens element closest to the image side. For example, the length of the lens assembly in Figure 2 is the length along the optical axis L from the object side surface of the first lens element to the image side surface of the seventh lens element.

[0065] The field of view (FOV) is the angle between the two edges of the lens, with the lens as the vertex, and the maximum range through which the image of the subject can pass. The FOV determines the lens's field of view; a larger FOV means a wider field of view. The half field of view (HFOV) refers to half the FOV.

[0066] Modulation transfer function (MTF) is an evaluation measure of system imaging quality.

[0067] An embodiment of the present application provides an electronic device, which may include but is not limited to a mobile phone, a tablet personal computer, a laptop computer, a camera, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a POS machine, a personal digital assistant (PDA), a wearable device, a virtual reality (VR) device (such as VR glasses, VR helmets, etc.), an augmented reality (AR) device (such as AR glasses, AR helmets, etc.), an in-vehicle device, a surveillance camera device, and other electronic devices that can implement a shooting function.

[0068] In the embodiment of the present application, the electronic device is taken as an example of a mobile phone. The mobile phone may be a bar phone, or the mobile phone may be a folding phone. Specifically, the following description will be made by taking the electronic device as a bar phone as an example.

[0069] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

[0070] As shown in Figure 1, the electronic device 100 may include a shell 102 and a camera module 101, wherein the shell 102 can serve as the main load-bearing structural component of the electronic device, and the camera module 101 can be set on the shell 102. Exemplarily, the shell 102 can have a accommodating cavity, and the camera module 101 can be assembled on the shell 102, and at least part of it can be located in the accommodating cavity of the shell 102.

[0071] The camera module 101 is used to realize the function of shooting, for example, it can be used to take photos and record images, etc. Its shooting scenes can include various complex and diverse shooting application scenes, such as indoor, outdoor, people, environment and other different scenes.

[0072] The electronic device 100 may further include a display screen (not shown in the figure), which may be fixed to one side of the housing 102 . The plane of the side where the display screen is located may serve as the display surface of the electronic device 100 to display images and the like.

[0073] In the embodiment of the present application, the side where the display surface of the electronic device 100 is located is used as the front of the electronic device 100, and the side opposite to the front is used as the back of the electronic device 100. The directions perpendicular to the front of the electronic device 100 and the back of the electronic device 100 can be the thickness direction of the electronic device 100, such as the z direction shown in Figure 1.

[0074] The camera module 101 may be a front-facing camera lens. For example, the camera module may be located on the front of the electronic device 100 for taking selfies or photographing other objects.

[0075] Alternatively, the camera module 101 may also be a rear camera lens. As shown in FIG1 , the camera module 101 may be located on the back of the electronic device 100 for photographing other objects and, of course, for taking selfies.

[0076] The number of camera modules 101 included in the electronic device 100 may be one, or the number of camera modules 101 may be multiple, so as to meet different shooting requirements.

[0077] The electronic device 100 may also include other structural components. For example, as shown in FIG1 , the electronic device 100 may further include a bell mouth 103 . The bell mouth 103 may be provided on the housing 102 and may be used to play audio, etc., of the electronic device 100 . A sound emitter (not shown) may also be provided in the housing cavity of the housing 102 and may be used to generate sound. The sound emitter may be connected to the bell mouth 103 so that the sound can be transmitted through the bell mouth 103 .

[0078] The electronic device 100 may also have a data interface 104, which may be opened on the shell 102. A control circuit board (not shown in the figure) may also be provided in the accommodating cavity of the shell 102. The control circuit board may be connected to the data interface 104. The data interface 104 may be used to power the electronic device 100, or the data interface 104 may also be used to connect the electronic device 100 to headphones, external multimedia devices, etc. (such as external cameras, external projection devices, etc.).

[0079] It should be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown, or may combine or separate certain components, or may have different component arrangements. For example, the electronic device 100 may also include sensors, processors, drive structures, flashlights, and other devices.

[0080] A camera module typically includes a lens assembly and an image sensor. Light can enter the camera module through the lens assembly. Specifically, light reflected by the object being photographed can pass through the lens assembly, which is used to form an optical image (light signal) of the object. The lens assembly can adjust and control the light path to form an optical image, and then illuminate this optical image to the image sensor. The image sensor can perform photoelectric conversion, receiving the optical image and converting it into an electrical signal for imaging display.

[0081] Therefore, the optical performance of the lens assembly will have a great impact on the imaging quality and effect of the camera module. For example, the aperture number of the lens assembly will affect the night scene shooting, video, background blur and snapshot functions. In other words, the camera module using a large aperture has better imaging quality and imaging effect in scenes such as night scene shooting, video, background blur and snapshot.

[0082] The target surface size of the lens assembly is also one of the important factors affecting the imaging quality. A lens assembly with a large target surface is conducive to improving the imaging brightness and resolution of the entire camera module, obtaining better imaging quality. In addition, a lens assembly with a large target surface design is also conducive to the realization of the telephoto function, further enriching the shooting effect and improving the imaging quality.

[0083] Therefore, as the demand for shooting with electronic devices such as mobile phones becomes increasingly higher, in order to further increase the amount of light entering, the imaging system is gradually developing towards a large aperture and a large target surface to achieve high imaging quality and effects.

[0084] However, for optical lenses, increasing the aperture and target area can increase the amount of light entering the optical imaging system, but this often also increases the length of the lens assembly itself and the overall optical length, making the entire camera module longer. This occupies a large space in the thickness direction of the electronic device, which is not conducive to the thinning design of the electronic device. Therefore, the length of the lens assembly and the overall optical length have become bottlenecks that restrict the high imaging quality of large aperture and large target area lenses. For example, the main camera module commonly used in electronic devices is difficult to achieve both large aperture and large target area due to the constraints of the device thickness and focal length. The imaging quality of the main camera module needs to be further improved. In addition, the main camera module is generally difficult to achieve telephoto function. In other words, it is difficult for a single camera module to meet the characteristics of main and telephoto. Therefore, electronic devices usually have separate main and telephoto modules. The telephoto module is used to meet the telephoto shooting requirements. This leads to high cost and large size of the camera module in the electronic device. The brightness and color changes of the image when switching between the two modules are also obvious, resulting in a poor user experience and affecting the performance of the electronic device.

[0085] Based on this, embodiments of the present application provide a lens assembly comprising two lens units, with the first lens unit near the object side being movable to switch the lens assembly between an active and a non-active state. This allows the lens assembly to combine a large aperture and a large target surface in the active state, achieving high-quality imaging. When in the non-active state, the lens assembly has a shorter overall length and optical length, achieving an ultra-thin structure for the lens assembly and camera module, meeting the demand for thinning electronic devices.

[0086] The lens assembly provided in the embodiments of the present application and the camera module including the lens assembly are described in detail below with reference to the accompanying drawings.

[0087] FIG2 is a schematic structural diagram of a lens assembly in a camera module provided by an embodiment of the present application when in a working state.

[0088] As shown in Figure 2, the camera module 101 may include a lens assembly 10 and an image sensor 20, wherein the image sensor 20 may be located on the side of the lens assembly 10 facing the image side, that is, the lens assembly 10 may be located between the object to be photographed and the image sensor 20, and the photosensitive surface (also referred to as the imaging surface) of the image sensor 20 may face the lens assembly 10.

[0089] The light reflected by the object enters the camera module 101, forms an image after passing through the lens assembly 10 and is irradiated onto the photosensitive surface of the image sensor 20. The photosensitive surface of the image sensor 20 receives the optical image and converts it into an image electrical signal output, thereby realizing the camera module 101's functions such as taking pictures or videos.

[0090] To ensure the photosensitivity of the image sensor 20, the image sensor 20 can be located in a housing inside the electronic device housing, and the lens assembly 10 can be located on the side of the image sensor 20 facing the display screen, or the lens assembly 10 can also be located on the side of the image sensor 20 facing away from the display screen.

[0091] The image sensor 20 may be a charge-coupled device (CCD), or a complementary metal oxide semiconductor (CMOS), or other devices capable of performing photoelectric conversion.

[0092] Continuing with FIG. 2 , the camera module 101 may further include an optical filter 30, which may be positioned between the lens assembly 10 and the image sensor 20. With the dotted line L in FIG. 2 as the optical axis, the lens assembly 10, the optical filter 30, and the image sensor 20 are sequentially arranged along the direction of the optical axis L from the object side to the image side. Light entering the camera module 101 passes through the lens assembly 10 and the optical filter 30 in sequence before being irradiated onto the photosensitive surface of the image sensor 20. The optical filter 30 has a filtering effect, allowing light within a specific wavelength range to pass through, thereby filtering out stray light that is detrimental to imaging and improving image quality.

[0093] It is understood that, to facilitate receiving light during shooting, the optical axis L of the lens assembly 10 can be parallel to the thickness direction of the electronic device. In the embodiment of the present application, the thickness of the lens assembly 10 or the camera module 101 can refer to the length of the lens assembly 10 or the camera module 101 along the optical axis L, that is, the thickness z direction.

[0094] The camera module 101 may also include an image processor, a memory, etc. (not shown in the figure). The image sensor 20 may transmit the converted electrical signal to the image processor, the memory, etc. for processing and then transmit it to the electronic device, thereby realizing the display of the image of the photographed object through the display screen of the electronic device.

[0095] Of course, in some other examples, the camera module 101 may also include other structural components, such as a detection sensor, a driving structure, and a circuit board.

[0096] 2 , the lens assembly 10 may include at least a first lens unit 110 and a second lens unit 120 arranged in sequence from the object side to the image side along the optical axis L, and the first lens unit 110 and the second lens unit 120 are respectively composed of lenses having optical power.

[0097] The lens assembly 10 may further include a lens barrel (not shown), which may serve as the primary structural member of the lens assembly 10. The first lens unit 110 and the second lens unit 120 may be disposed within the lens barrel, and the optical axis of the lens assembly 10 may coincide with the central axis of the lens barrel. Light apertures may be provided at opposite ends of the lens barrel along the optical axis to allow light to enter the lens barrel and pass through the lens assembly 10, and also to allow light that has passed through the lens assembly 10 to exit and illuminate the image sensor 20.

[0098] The lens assembly 10 may further include an aperture 130, which may be located on a side of the first lens unit 110 facing the object side. That is, compared with the first lens unit 110 and the second lens unit 120, the aperture 130 may be disposed closer to the object side. The aperture 130 may be fixed within the lens barrel. For example, the aperture 130 may be fixed to the lens (e.g., the first lens 11) disposed closest to the object side in the first lens unit 110.

[0099] Of course, in some other examples, the aperture 130 can also be fixed outside the lens barrel. Light can first pass through the aperture 130, then pass through the first lens unit 110 and the second lens unit 120 in sequence before being emitted. The aperture 130 can limit the light entering the lens assembly 10 to adjust the light intensity and can be used to control the amount of light entering the lens assembly 10.

[0100] Among them, the aperture 130 can be a variable aperture whose aperture size can be adjusted, which improves the controllability and flexibility of the aperture 130 in adjusting the amount of incoming light, so that the lens assembly 10 can provide different depth of field ranges for different shooting scenes, thereby taking into account the shooting needs of multiple scenes.

[0101] Of course, in some other examples, the aperture 130 may also be an aperture with a fixed diameter, which ensures the amount of light entering while simplifying the structural design difficulty of the lens assembly 10.

[0102] The first lens unit 110 may include multiple lenses, which may be arranged sequentially from the object side to the image side along the optical axis. The centers of the multiple lenses may overlap and lie on the optical axis. For example, as shown in FIG2 , the first lens unit 110 may include five lenses having optical power, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The first lens 11, the second lens 12, the third lens 13, the fourth lens 14, and the fifth lens 15 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 having optical power disposed closest to the object side in the first lens unit 110, and the fifth lens 15 is the lens having optical power disposed closest to the image side (the second lens unit 120) in the first lens unit 110.

[0103] The second lens unit 120 may include multiple lenses, and the multiple lenses may be arranged sequentially along the optical axis from the object side to the image side. The centers of the multiple lenses may overlap and lie on the optical axis. For example, as shown in FIG2 , the second lens unit 120 may include two lenses having optical power, such as a sixth lens 16 and a seventh lens 17 . The sixth lens 16 and the seventh lens 17 are arranged sequentially along the optical axis L from the object side to the image side. Specifically, the sixth lens 16 is the lens having optical power disposed closest to the object side (the first lens unit 110) in the second lens unit 120, and the seventh lens 17 is the lens having optical power disposed closest to the image side in the second lens unit 120.

[0104] Of course, in some other examples, the number of lenses in the second lens unit 120 may also be one. For example, the second lens unit 120 may only include the sixth lens 16 .

[0105] The above two lens unit structures form the lens assembly 10. By reasonably allocating the number of lenses, the optical parameters of each lens and the structural layout, a large aperture and large target surface design of the lens assembly 10 can be achieved, so that the lens assembly 10 has excellent optical quality and significantly improves the imaging quality and effect.

[0106] For example, in the embodiment of the present application, an example is given in which the first lens unit 110 includes five lenses with optical power, and the second lens unit 120 includes two lenses with optical power.

[0107] The lens assembly 10 can have an operating state and a non-operating state. For example, when the camera module 101 is used to shoot and the lens assembly 10 is required to achieve imaging, the lens assembly 10 is in the operating state. When the camera module 101 is not used to shoot and the lens assembly 10 is not required to achieve imaging, the lens assembly 10 is in the non-operating state.

[0108] For example, in one possible example, taking a mobile phone as an example, the mobile phone may include the camera module 101, and the mobile phone can realize the shooting function of a large aperture and a large target surface through the camera module 101. When the user turns on the shooting function of the mobile phone (such as by clicking to open the camera application on the page displayed on the mobile phone display), the lens assembly 10 switches to the working state. When the lens assembly 10 is in the working state, the lens assembly 10 can be used for imaging, so that the camera module 101 can realize the shooting function. When the user turns off or exits the shooting function of the mobile phone (such as when turning off or exiting the camera), the lens assembly 10 switches to the non-working state. When the lens assembly 10 is in the non-working state, the lens assembly 10 is not used for imaging, and the camera module 101 does not realize the shooting function.

[0109] Alternatively, in another possible example, the mobile phone may include the camera module 101, and the mobile phone may also include other camera modules to realize other camera functions (such as telephoto function, etc.), thereby enriching the camera function of the mobile phone. When the user turns on the shooting function of the mobile phone (such as when clicking to turn on the camera) and switches to the large aperture, large target surface shooting mode, the lens assembly 10 switches to the working state. When the lens assembly 10 is in the working state, the lens assembly 10 can be used for imaging, so that the camera module 101 realizes the shooting function. When the user turns off or exits the large aperture, large target surface mode and switches to other camera modules to realize other camera functions, or turns off or exits the shooting function (such as when turning off or exiting the camera), the lens assembly 10 switches to the non-working state, the lens assembly 10 is not used for imaging, and the camera module 101 does not realize the shooting function.

[0110] All lenses of the first lens unit 110 can be movably fixed to the lens barrel, and the second lens unit 120 can be fixedly assembled to the lens barrel. All lenses of the first lens unit 110 can move relative to the lens barrel (the housing of the electronic device), the second lens unit 120, and the image sensor 20. The movement of all lenses in the first lens unit 110 can realize the switching of the lens assembly 10 between the operating state and the non-operating state.

[0111] Specifically, as shown in FIG2 , when the lens assembly 10 is in operation, a certain spacing is maintained between the first lens unit 110 and the second lens unit 120 on the optical axis. This spacing is the air gap on the optical axis between the first lens unit 110 and the second lens unit 120. For example, when the second lens unit 120 includes multiple lenses, this spacing is the distance on the optical axis between the image side of the lens closest to the image side in the first lens unit 110 and the object side of the lens closest to the object side in the second lens unit 120, such as the spacing GD on the optical axis between the fifth lens element 15 of the first lens unit 110 and the sixth lens element 16 of the second lens unit 120 in FIG2 . The relatively long length and overall optical length of the lens assembly 10 facilitate the realization of both a large aperture and a large target area when in operation, and facilitate the realization of the telephoto function of the lens assembly 10. In this case, the entire camera module 101 is relatively long along the optical axis, and the camera module 101 is relatively thick.

[0112] It can be understood that when the number of lenses in the second lens unit 120 is one, such as including only the sixth lens, the spacing is the distance on the optical axis between the image side surface of the lens closest to the image side (such as the fifth lens 15) in the first lens unit 110 and the object side surface of the sixth lens in the second lens unit 120.

[0113] Specifically, when the lens assembly 10 is in a working state, the half-image height of the lens assembly 10 is IMH, the aperture number of the lens assembly 10 is F#, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 can satisfy IMH / F#>4.0, so that the lens assembly 10 has a larger half-image height and a smaller aperture number, which means that the lens assembly 10 can have both large aperture and large target surface characteristics when in a working state, and has high imaging quality, thereby realizing high-quality imaging of the lens assembly 10 with a large target surface and a large aperture.

[0114] When the lens assembly 10 switches from a working state to a non-working state, all the lenses of the first lens unit 110 can move along the optical axis toward the second lens unit 120, that is, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15 in the first lens unit 110 move along the optical axis L toward the second lens unit 120, compressing the distance GD between the first lens unit 110 and the second lens unit 120, thereby reducing the distance between the first lens unit 110 and the second lens unit 120, shortening the length of the lens assembly 10 and the total optical length, and thus reducing the overall length of the camera module 101 on the optical axis (that is, the thickness of the camera module 101).

[0115] FIG3 is a structural diagram of a lens assembly in a camera module provided by an embodiment of the present application when the lens assembly is in a non-working state.

[0116] When the lens assembly 10 is in a non-working state, as shown in FIG3 , the first lens unit 110 is arranged adjacent to the second lens unit 120 , and the distance between the two can be very small. The lens assembly 10 has a smaller length dimension and total optical length, which significantly reduces the thickness of the camera module 101 .

[0117] That is to say, in the embodiment of the present application, when the lens module 10 is in the working state, the distance between the first lens unit 110 and the second lens unit 120 can be released, that is, the overall optical length of the lens module 10 in the working state is released, so that the lens module 10 can have a large semi-image height and a small aperture number, achieving the characteristics of a large aperture and a large target surface for the lens module 10, improving the imaging quality and effect, and also facilitating the implementation of the telephoto function. When the lens module 10 is in the non-working state, the distance between the first lens unit 110 and the second lens unit 120 is compressed, thus achieving the compression of the length and the overall optical length of the lens module 10, reducing the thickness dimension of the lens module 10 and the camera module 101, so as to meet the thinning design requirements of the electronic device. That is, the lens module 10 can ensure miniaturization and thinning in the non-working state, and at the same time take into account the characteristics of a large aperture, a large target surface and a telephoto function in the working state, ensuring the imaging quality, so that the camera module 101 can achieve a large aperture, a large target surface and a telephoto function under the condition of meeting the thinning requirements of the electronic device. Moreover, through a single camera module 101, the performance of the main camera module and the telephoto module can be taken into account while maintaining high camera quality, facilitating the optimization of the spatial layout of the electronic device, reducing the cost of the camera module of the electronic device, and improving the performance and experience of the electronic device.

[0118] Among them, when the lens module 10 is in the working state, taking the overall optical length of the lens module 10 as TTL, the ratio range of the distance GD on the optical axis between the first lens unit 110 and the second lens unit 120 to the overall optical length TTL of the lens module 10 can be 0.2 < GD / TTL < 0.5. When the overall optical length is fixed, making the distance GD between the first lens unit 110 and the second lens unit 120 relatively large is conducive to the realization of the optical path, so as to ensure that the lens module 10 can achieve high-quality imaging with a large aperture and a large target surface design in the working state.

[0119] Moreover, making the distance GD between the first lens unit 110 and the second lens unit 120 relatively large, when the lens module 10 is switched to the non-working state by moving the first lens unit 110, compressing the long distance can make the lens module 10 have a smaller length and overall optical length in the non-working state, significantly reducing the length dimension of the lens module 10 and the camera module 101 in the non-working state, making the thinning of the camera module 101 in the non-working state obvious, so as to obtain an extremely thin camera module 101 in the non-working state, which is more conducive to meeting the thinning requirements of the electronic device.

[0120] In addition, in order to meet the focusing requirements of the camera module 101 during the shooting process, such as auto focus (AF), zoom, etc., when the lens assembly 10 is in working state, all the lenses in the first lens unit 110 or at least one lens in the first lens unit 110 close to the image side (second lens unit 120) can be moved along the optical axis, such as all or part of the above-mentioned lenses can be moved along the optical axis toward or away from the image sensor 20, thereby changing the distance between all or part of the moving lenses and the image sensor 20, thereby realizing the adjustment of the focal length of the lens assembly 10, such as realizing the auto focus or zoom functions of the lens assembly 10, so as to achieve better shooting effects.

[0121] For example, referring to FIG. 2 , all lenses of the first lens unit 110 are configured to be movable. That is, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, and the fifth lens 15 can be moved along the optical axis toward or away from the image sensor 20 to change the focal length of the lens assembly 10 and achieve functions such as focusing or zooming.

[0122] Of course, in some other examples, at least one lens in the first lens unit 110 close to the second lens unit 120 can also be movably arranged. For example, three lenses in the first lens unit 110 close to the second lens unit 120, such as the third lens 13, the fourth lens 14 and the fifth lens 15, can be moved along the optical axis toward or away from the image sensor 20, and operations such as focusing or zooming can also be achieved.

[0123] As a result, a larger distance GD is created between the first lens unit 110 and the second lens unit 120, and the movable range of the entire lens unit 110 or the portion of the lens close to the image side can be expanded, thereby improving the operational flexibility of focusing or zooming, making it easier to implement functions such as focusing or zooming, thereby further improving the imaging quality and effect.

[0124] It should be noted that when the lens assembly 10 is in working state, there is a large distance between the first lens unit 110 and the second lens unit 120, and the length and total optical length of the lens assembly 10 are relatively long. Therefore, in an electronic device, when the lens assembly 10 is in working state, at least a portion of the first lens unit 110 can be located outside the housing of the electronic device, so as to release the degree of freedom of the total optical length required by the lens assembly 10 when in working state, thereby achieving high-quality imaging with a large aperture and a large target surface, and reducing the total optical length of the lens assembly 10 and the impact of the length on the thickness of the electronic device. While ensuring optical performance, it is conducive to the thinning design of the electronic device.

[0125] It should be noted that when the lens assembly 10 is in operation, all lenses of the first lens unit 110 may be located outside the housing, or part of the lenses of the first lens unit 110 adjacent to the object side may be located outside the housing.

[0126] When the lens assembly 10 switches from an operating state to a non-operating state, such as turning off or exiting the shooting function or switching to another camera module for shooting, the first lens unit 110 can move along the optical axis toward the second lens unit 120, that is, move toward the inside of the housing, thereby compressing the distance between the first lens unit 110 and the second lens unit 120, significantly reducing the thickness of the camera module 101 in the non-operating state. The ultra-thin camera module 101 occupies less space in the electronic device. When the lens assembly 10 is in the non-operating state, even if the entire camera module 101 is placed inside the electronic device, it will not significantly restrict the thickness design of the electronic device, facilitating the thinning of the electronic device.

[0127] It should be noted that when the lens assembly 10 is in a non-operating state, the first lens unit 110 can be moved into the accommodating cavity within the housing so that its entirety is located within the accommodating cavity, that is, the entire camera module 101 can be located within the housing of the electronic device. Alternatively, the first lens unit 110 can be partially located within the housing and partially protruding outside the housing. For example, the portion of the lens of the first lens unit 110 adjacent to the object side can be located outside the housing, which facilitates further reducing the thickness of the electronic device while ensuring good aesthetics.

[0128] On the contrary, when the lens assembly 10 is switched from a non-working state to a working state, such as when the shooting function is turned on or the shooting function is turned on and switched to a large aperture, large target area shooting mode, the first lens unit 110 can move along the optical axis in a direction away from the second lens unit 120, that is, the first lens unit 110 moves toward the outside of the shell to restore the distance between the first lens unit 110 and the second lens unit 120, restore the total optical length of the lens assembly 10, and when the lens assembly 10 is in the working state, make at least a portion of the first lens unit 110 pop out of the shell.

[0129] In order to realize the movement of the first lens unit 110 along the optical axis, a light inlet can be opened on the shell (or display screen) of the electronic device, and the light inlet can be connected to the accommodating cavity in the shell. The first lens unit 110 can move toward the outside or inside of the shell through the light inlet.

[0130] In some examples, to ensure the sealing of the internal cavity of the electronic device, a cover plate may be provided on the light inlet, and to meet the movement requirements of the first lens unit 110, the cover plate may also be movable. For example, the cover plate may also be movable along the optical axis.

[0131] When the lens module 10 switches from the non-working state to the working state, the cover plate can first move outward along the optical axis direction towards the outside of the housing, so as to pop out to the outside of the housing to form an avoidance space. The first lens unit 110 can move within this avoidance space, such as moving towards the outside of the housing, so that at least part of the first lens unit 110 also pops out to the outside of the housing, restoring the length and optical total length of the lens module 10, and ensuring high-quality imaging with a large aperture and a large target surface of the lens module 10.

[0132] On the contrary, when the lens module 10 switches from the working state to the non-working state, the first lens unit 110 can contract along the optical axis towards the inside of the housing, compressing the distance between it and the second lens unit 120. The cover plate can also contract and move along the optical axis towards the inside of the housing, so that the cover plate is hermetically covered on the light inlet hole.

[0133] The camera module 101 may further include a lens driving structure. For example, the lens driving structure may be a driving chip, a driving motor, etc. The lens driving structure can be connected to the first lens unit 110, and the lens of the first lens unit 110 can be driven to move along the optical axis through the lens driving structure, so as to realize the switching of the lens module 10 between the working state and the non-working state, as well as operations such as zooming and focusing of the camera module 101.

[0134] It should be noted that in the embodiments of the present application, the specific movement mode of all the lenses in the first lens unit 110 is not limited. For example, all the lenses of the first lens unit 110 can be regarded as a whole, and the lens driving structure can drive the first lens unit 110 as a whole to move along the optical axis together.

[0135] Alternatively, the number of lens driving structures can be multiple. The multiple lens driving structures can cooperate with some of the lenses in the first lens unit 110 respectively, and the multiple lens driving structures can drive the corresponding lenses to move along the optical axis respectively, so that all the lenses of the first lens unit 110 move along the optical axis.

[0136] The following further details the optical performance of the lens module 10 when the lens module 10 is in the working state.

[0137] When the lens module 10 is in the working state, the aperture number F# of the lens module 10 can satisfy 1.1 < F# < 2. The aperture number is small, ensuring that the lens module 10 has the characteristics of a large aperture, and significantly improving the imaging quality and effect.

[0138] When the lens module 10 is in the working state, taking the focal length of the lens module 10 as EFL, the ratio of the spacing GD on the optical axis between the first lens unit 110 and the second lens unit 120 to the focal length EFL of the lens module 10 can satisfy 0.20 < GD / EFL < 0.60. The lens module 10 has a relatively long focal length and spacing GD, which is beneficial to further achieving high-quality imaging under the large target surface design of the lens module 10, and enables a relatively large spacing between the first lens unit 110 and the second lens unit 120, which is further beneficial to achieving significant thinning of the lens module 10 in the non-working state.

[0139] When the lens module 10 is in the working state, the ratio of the focal length EFL of the lens module 10 to the total optical length TTL of the lens module 10 can satisfy 0.6 < EFL / TTL < 0.9. When in the working state, the total optical length of the lens module 10 is relatively large, which also makes the focal length and the total optical length of the lens module 10 relatively large, facilitating the lens module 10 to achieve large aperture, large target surface and long focal length characteristics, and being beneficial to further improving the imaging quality and effect.

[0140] When the lens module 10 is in the working state, taking the focal length of the first lens unit 110 as EFL1, the ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens module 10 can satisfy 0.9 < EFL1 / EFL < 1.1. The optical power of the first lens unit 110 is reasonably distributed, enabling the first lens unit 110 to have a relatively large refractive power, and ensuring the imaging quality and effect of the lens module 10.

[0141] When the lens module 10 is in the working state, the ratio of the semi-image height IMH of the lens module 10 to the total optical length TTL of the lens module 10 can satisfy IMH / TTL < 0.7, making the semi-image height and the total optical length of the lens module 10 relatively large, further ensuring that the lens module 10 has the characteristic of a large target surface, and also facilitating the lens module 10 to achieve the long focal length function.

[0142] Taking the half field of view angle of the lens module 10 as HFOV, the focal length EFL of the lens module 10 and the half field of view angle of the lens module 10 can satisfy EFL * tan(HFOV) ≥ 8.00 mm, ensuring that the lens module 10 has a relatively large imaging range, enabling the lens module 10 to have a larger image height during imaging, and further ensuring that the lens module 10 can achieve a large target surface design and improving the imaging quality and effect of the lens module 10.

[0143] It should be noted that when the lens assembly 10 is in an operating state, all or part of the lenses of the first lens unit 110 close to the image side can be moved to achieve focusing or zooming of the lens assembly 10. When moving to achieve focusing or zooming, when all or part of the lenses of the first lens unit 110 are moved to any position, the imaging-related optical parameters of the lens assembly 10, such as the total optical length TTL, the focal length EFL, the half-image height IMH, the aperture number of the lens assembly 10, and the half-field angle of the lens assembly 10, can satisfy the aforementioned conditional expressions and ranges.

[0144] In the embodiment of the present application, the first lens unit 110 and the second lens unit 120 are both composed of lenses with optical focal length, wherein the number of lenses in the first lens unit 110 can be greater than or equal to 4. The number of lenses in the first lens unit 110 is reasonably distributed to ensure the light refraction ability of the first lens unit 110, which is conducive to realizing the large aperture and large target surface design of the lens assembly 10, thereby ensuring the imaging quality and effect.

[0145] The number of lenses in the second lens unit 120 can be less than or equal to 3. Under the condition of ensuring the imaging quality and effect of the lens assembly 10, it is beneficial to reduce the length and total optical length of the lens assembly 10, and further facilitate the thinning of the lens assembly 10 and the camera module 101. It can also reduce the complexity and cost of the structural design of the lens assembly 10, making it easier to implement.

[0146] For example, in one embodiment, as shown in Figures 2 and 3, the first lens unit 110 may include five lenses with optical power, such as a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The second lens unit 120 may include two lenses with optical power, such as a sixth lens 16 and a seventh lens 17. This results in the lens assembly 10 having a seven-lens structure, including seven lenses with optical power. This structure is relatively simple, and while ensuring that the lens assembly 10 can achieve high-quality imaging with a large aperture and a large target area, it also helps reduce size and cost.

[0147] Of course, in some other examples, the number of lenses in the first lens unit 110 and the second lens unit 120 can also be other values, so that the lens assembly 10 can also include other lens arrangements and combinations, and is not limited to the above embodiment, and only the above embodiment is used for illustration.

[0148] In the embodiment of the present application, there is no restriction on the optical power of each lens having optical power in the lens assembly 10, and the optical power can be selected and set according to actual camera requirements.

[0149] For example, in the above-mentioned seven-piece lens assembly 10, the first lens 11 can have positive focal power, the second lens 12 can have negative focal power, the fourth lens 14 can have negative focal power, the fifth lens 15 can have positive focal power, the sixth lens 16 can have positive focal power, and the seventh lens 17 can have negative focal power. The focal power of each lens is reasonably distributed, which is conducive to realizing a large aperture and large target surface design of the lens assembly 10 when it is in working state.

[0150] The shapes of the multiple lenses in the lens assembly 10 can be the same, or the shapes of the multiple lenses can be different. The specific lens shape can be selected and set according to design requirements. For example, the shape of the lens can be circular, elliptical, or other regular or irregular shapes.

[0151] Exemplarily, in the lens assembly 10, the lens element closest to the image side is the seventh lens element 17, followed by the sixth lens element 16. Light passes through the sixth and seventh lens elements 16, 17, and then exits and illuminates the image sensor 20. At least one of the object-side and image-side surfaces of the sixth lens element 16 and the seventh lens element 17 can be toric surfaces. A toric surface refers to a surface with at least two different radii of curvature on two mutually perpendicular cross-sectional circles. For example, as shown in FIG3 , the image-side surface of the sixth lens element 16 is an M-shaped surface. This allows for adjustment of the incident angle of light on the image sensor 20, further facilitating a large target surface design and enhancing the sensitivity of the second lens unit 120, thereby further improving the imaging quality and performance of the lens assembly 10.

[0152] Each lens in the first lens unit 110 and the second lens unit 120 can be an aspherical lens. For example, each 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 help to achieve the large aperture performance of the lens assembly 10, and is also helpful to reduce the total optical length of the lens assembly 10.

[0153] The architecture and performance of the lens assembly 10 and camera module 101 provided in this application are described below in conjunction with specific embodiments.

[0154] Example 1

[0155] FIG4 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 1 of the present application when the lens assembly is in a working state.

[0156] In this embodiment, as shown in FIG4 , the lens assembly 10 includes seven lenses having optical power. The first lens unit 110 includes five lenses having optical power, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The second lens unit 120 includes two lenses having optical power, namely, a sixth lens 16 and a seventh lens 17. 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, the sixth lens 16, and the seventh lens 17 are arranged in order.

[0157] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, the aperture 130, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the seventh lens 17, the filter 30, and the image sensor 20 are arranged in sequence. Light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in this order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0158] The first lens 11 may have positive power, the object side surface of the first lens 11 at least the portion corresponding to the optical axis may be convex, and the image side surface of the first lens 11 at least the portion corresponding to the optical axis may be concave.

[0159] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0160] The third lens 13 may have negative optical power, and at least the portion of the object side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0161] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0162] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0163] The sixth lens element 16 may have positive power. At least the portion of the object-side surface of the sixth lens element 16 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the sixth lens element 16 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the sixth lens element 16 may be a toric surface.

[0164] The seventh lens element 17 may have negative optical power. At least the portion of the object-side surface of the seventh lens element 17 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the seventh lens element 17 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the seventh lens element 17 may be a toric surface.

[0165] When the lens assembly 10 is in an active state, as shown in FIG4 , a significant distance is maintained along the optical axis between the object-side surface of the fifth lens element 15 in the first lens unit 110 and the image-side surface of the sixth lens element 16 in the second lens unit 120. This allows the lens assembly 10 to achieve high-quality imaging with a large aperture and a large target area. When the lens assembly 10 switches from an active state to a non-active state, all of the lenses in the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between them and reducing the length of the lens assembly 10 and the camera module 101.

[0166] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in operation.

[0167] The half-image height IMH of the lens assembly 10 is 8.2 mm, the aperture number F# of the lens assembly 10 is 1.277, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=6.421 mm.

[0168] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 2.88 mm, the total optical length TTL of the lens assembly 10 is 12.88 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.224.

[0169] The focal length EFL of the lens assembly 10 is 10.0 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.288.

[0170] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.996.

[0171] The ratio of the half-image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.637.

[0172] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.78.

[0173] The half field of view HFOV of the lens assembly 10 is 40°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.391 mm.

[0174] Table 1.1 shows the optical parameters of each lens in a camera module provided in Example 1 of the present application.

[0175] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0176] S1 and S2 are respectively the object side surface and image side surface of the first lens 11, S3 and S4 are respectively the object side surface and image side surface of the second lens 12, S5 and S6 are respectively the object side surface and image side surface of the third lens 13, S7 and S8 are respectively the object side surface and image side surface of the fourth lens 14, S9 and S10 are respectively the object side surface and image side surface of the fifth lens 15, S11 and S12 are respectively the object side surface and image side surface of the sixth lens 16, S13 and S14 are respectively the object side surface and image side surface of the seventh lens 17, and S15 and S16 are respectively the object side surface and image side surface of the filter 30.

[0177] Thickness is the spacing between adjacent surfaces, measuring the distance on the optical axis from the object side to the image side, between a mirror surface and the next adjacent mirror surface. For example, the thickness corresponding to the row containing the aperture is the distance on the optical axis from the aperture 130 to the object side surface of the first lens element 11. The thickness corresponding to the row containing the object side surface S1 of the first lens element 11 is the distance on the optical axis from the object side surface to the image side surface of the first lens element 11, that is, the thickness of the first lens element 11 on the optical axis. The thickness corresponding to the row containing the image side surface S2 of the first lens element 11 is the distance on the optical axis from the image side surface of the first lens element 11 to the object side surface of the second lens element 12. And so on.

[0178] Table 1.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 1 of the present application.

[0179] As shown in Table 1.2, each lens in the lens assembly 10 is an aspheric lens, and the lens assembly 10 includes 14 aspheric surfaces. The aspheric surface shape z of each lens in the lens assembly 10 can be calculated using the following aspheric surface formula:

[0180] Wherein, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0181] The optical parameters of the camera module 101 composed of the above-mentioned lenses can be seen in Table 1.3 below.

[0182] Table 1.3 shows the optical parameters of a camera module provided in Example 1 of the present application.

[0183] As can be seen from Table 1.3, the lens assembly 10 provided in the first embodiment of the present application can achieve the characteristics of a large aperture and a large target area when in operation, which is beneficial for improving the imaging quality and effect of the camera module 101. In addition, when the lens assembly 10 switches to the non-operating state, the distance that can be compressed is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 when in the non-operating state.

[0184] FIG5 is a modulation transfer function curve diagram of a camera module provided in Example 1 of the present application.

[0185] Among them, the horizontal axis in Figure 5 represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridional field of view. The F1:Diff.Limit line in the figure is shown as the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. It can be seen from Figure 5 that the camera module provided in Example 1 of the present application can achieve high-quality imaging.

[0186] Example 2

[0187] FIG6 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 2 of the present application when the lens assembly is in a working state.

[0188] In this embodiment, as shown in FIG6 , the lens assembly 10 includes seven lenses having optical power. The first lens unit 110 includes five lenses having optical power, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The second lens unit 120 includes two lenses having optical power, namely, a sixth lens 16 and a seventh lens 17. 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, the sixth lens 16, and the seventh lens 17 are arranged in order.

[0189] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown), 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 seventh lens 17, a filter 30, and an image sensor 20 are arranged in sequence. Light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in the above order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0190] The first lens 11 may have positive power, and at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0191] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0192] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0193] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0194] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0195] The sixth lens element 16 may have positive power. At least the portion of the object-side surface of the sixth lens element 16 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the sixth lens element 16 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the sixth lens element 16 may be a toric surface.

[0196] The seventh lens element 17 may have negative optical power. At least the portion of the object-side surface of the seventh lens element 17 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the seventh lens element 17 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the seventh lens element 17 may be a toric surface.

[0197] When the lens assembly 10 is in an active state, as shown in FIG6 , a significant distance is maintained along the optical axis between the object-side surface of the fifth lens element 15 in the first lens unit 110 and the image-side surface of the sixth lens element 16 in the second lens unit 120. This allows the lens assembly 10 to achieve high-quality imaging with a large aperture and a large target area. When the lens assembly 10 switches from an active state to a non-active state, all of the lenses in the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between them and reducing the length of the lens assembly 10 and the camera module 101.

[0198] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in operation.

[0199] The half-image height IMH of the lens assembly 10 is 8.43 mm, the aperture number F# of the lens assembly 10 is 1.359, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=6.203 mm.

[0200] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 3.35 mm, the total optical length TTL of the lens assembly 10 is 13.35 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.251.

[0201] The focal length EFL of the lens assembly 10 is 9.93 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.337.

[0202] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.947.

[0203] The ratio of the half-image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.631.

[0204] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.744.

[0205] The half field of view HFOV of the lens assembly 10 is 40°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.332 mm.

[0206] Table 2.1 shows the optical parameters of each lens in a camera module provided in Example 2 of the present application.

[0207] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0208] For details of S1-S16, thickness, etc., please refer to the first embodiment and will not be described in detail in this embodiment.

[0209] Table 2.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 2 of the present application.

[0210] As shown in Table 2.2, all lenses in the lens assembly 10 are aspherical lenses, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0211] Wherein, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0212] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 2.3 below.

[0213] Table 2.3 shows the optical parameters of a camera module provided in Example 2 of the present application.

[0214] As can be seen from Table 2.3, the lens assembly 10 provided in Example 2 of the present application can achieve the characteristics of a large aperture and a large target area when in operation, which is beneficial for improving the imaging quality and effect of the camera module 101. In addition, when the lens assembly 10 switches to the non-operating state, the distance that can be compressed is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 when in the non-operating state.

[0215] FIG7 is a modulation transfer function curve diagram of a camera module provided in Example 2 of the present application.

[0216] Among them, the horizontal axis in Figure 7 represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridional field of view. The F1:Diff.Limit line in the figure is shown as the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. It can be seen from Figure 7 that the camera module provided in Example 2 of the present application can achieve high-quality imaging.

[0217] Example 3

[0218] FIG8 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 3 of the present application when the lens assembly is in a working state.

[0219] In this embodiment, as shown in FIG8 , the lens assembly 10 includes seven lenses having optical power. The first lens unit 110 includes five lenses having optical power, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The second lens unit 120 includes two lenses having optical power, namely, a sixth lens 16 and a seventh lens 17. 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, the sixth lens 16, and the seventh lens 17 are arranged in order.

[0220] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown), 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 seventh lens 17, a filter 30, and an image sensor 20 are arranged in sequence. Light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in the above order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0221] The first lens 11 may have positive power, and at least the portion of the object side surface of the first lens 11 corresponding to the optical axis may be a convex surface, and at least the portion of the image side surface of the first lens 11 corresponding to the optical axis may be a convex surface.

[0222] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0223] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0224] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a convex surface.

[0225] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0226] The sixth lens element 16 may have positive power. At least the portion of the object-side surface of the sixth lens element 16 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the sixth lens element 16 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the sixth lens element 16 may be a toric surface.

[0227] The seventh lens element 17 may have negative optical power. At least the portion of the object-side surface of the seventh lens element 17 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the seventh lens element 17 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the seventh lens element 17 may be a toric surface.

[0228] When the lens assembly 10 is in an active state, as shown in FIG8 , a significant distance is maintained along the optical axis between the object-side surface of the fifth lens element 15 in the first lens unit 110 and the image-side surface of the sixth lens element 16 in the second lens unit 120. This allows the lens assembly 10 to achieve high-quality imaging with a large aperture and a wide target area. When the lens assembly 10 switches from an active state to a non-active state, all of the lenses in the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between them and reducing the length of the lens assembly 10 and the camera module 101.

[0229] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in operation.

[0230] The half-image height IMH of the lens assembly 10 is 8.42 mm, the aperture number F# of the lens assembly 10 is 1.51, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=5.576 mm.

[0231] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 3.19 mm, the total optical length TTL of the lens assembly 10 is 13.19 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.242.

[0232] The focal length EFL of the lens assembly 10 is 9.82 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.325.

[0233] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.969.

[0234] The ratio of the half-image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.638.

[0235] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.745.

[0236] The half field of view HFOV of the lens assembly 10 is 39.8°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.182 mm.

[0237] Table 3.1 shows the optical parameters of each lens in a camera module provided in Example 3 of the present application.

[0238] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0239] For details of S1-S16, thickness, etc., please refer to the first embodiment and will not be described in detail in this embodiment.

[0240] Table 3.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 3 of the present application.

[0241] As shown in Table 3.2, all lenses in the lens assembly 10 are aspherical lenses, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0242] Wherein, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0243] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 3.3 below.

[0244] Table 3.3 shows the optical parameters of a camera module provided in Example 3 of the present application.

[0245] As can be seen from Table 3.3, the lens assembly 10 provided in Example 3 of the present application can achieve the characteristics of a large aperture and a large target area when in operation, which is beneficial for improving the imaging quality and effect of the camera module 101. In addition, when the lens assembly 10 switches to the non-operating state, the distance that can be compressed is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 when in the non-operating state.

[0246] FIG9 is a modulation transfer function curve diagram of a camera module provided in Example 3 of the present application.

[0247] Among them, the horizontal axis in Figure 9 represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridional field of view. The F1:Diff.Limit line in the figure is shown as the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. It can be seen from Figure 9 that the camera module provided in Example 3 of the present application can achieve high-quality imaging.

[0248] Example 4

[0249] FIG10 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 4 of the present application when the lens assembly is in a working state.

[0250] In this embodiment, as shown in FIG10 , the lens assembly 10 includes seven lenses having optical power. The first lens unit 110 includes five lenses having optical power, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The second lens unit 120 includes two lenses having optical power, namely, a sixth lens 16 and a seventh lens 17. 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, the sixth lens 16, and the seventh lens 17 are arranged in order.

[0251] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown), 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 seventh lens 17, a filter 30, and an image sensor 20 are arranged in sequence. Light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in the above order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0252] The first lens 11 may have positive power, the object side surface of the first lens 11 at least the portion corresponding to the optical axis may be convex, and the image side surface of the first lens 11 at least the portion corresponding to the optical axis may be concave.

[0253] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0254] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0255] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0256] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0257] The sixth lens element 16 may have positive power. At least the portion of the object-side surface of the sixth lens element 16 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the sixth lens element 16 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the sixth lens element 16 may be a toric surface.

[0258] The seventh lens element 17 may have negative optical power. At least the portion of the object-side surface of the seventh lens element 17 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the seventh lens element 17 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the seventh lens element 17 may be a toric surface.

[0259] When the lens assembly 10 is in an active state, as shown in FIG10 , a significant distance is maintained along the optical axis between the object-side surface of the fifth lens element 15 in the first lens unit 110 and the image-side surface of the sixth lens element 16 in the second lens unit 120. This allows the lens assembly 10 to achieve high-quality imaging with a large aperture and a large target area. When the lens assembly 10 switches from an active state to a non-active state, all of the lenses in the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between them and reducing the length of the lens assembly 10 and the camera module 101.

[0260] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in operation.

[0261] The half-image height IMH of the lens assembly 10 is 8.30 mm, the aperture number F# of the lens assembly 10 is 1.71, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=4.854 mm.

[0262] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 2.81 mm, the total optical length TTL of the lens assembly 10 is 12.45 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.226.

[0263] The focal length EFL of the lens assembly 10 is 9.22 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.305.

[0264] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.993.

[0265] The ratio of the half-image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.667.

[0266] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.741.

[0267] The half field of view HFOV of the lens assembly 10 is 41.99°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.30 mm.

[0268] Table 4.1 shows the optical parameters of each lens in a camera module provided in Example 4 of the present application.

[0269] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0270] For details of S1-S16, thickness, etc., please refer to the first embodiment and will not be described in detail in this embodiment.

[0271] Table 4.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 4 of the present application.

[0272] As shown in Table 4.2, all lenses in the lens assembly 10 are aspherical lenses, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0273] Wherein, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0274] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 4.3 below.

[0275] Table 4.3 shows the optical parameters of a camera module provided in Example 4 of the present application.

[0276] As can be seen from Table 4.3, the lens assembly 10 provided in Example 4 of the present application can achieve the characteristics of a large aperture and a large target area when in operation, which is beneficial for improving the imaging quality and effect of the camera module 101. In addition, when the lens assembly 10 switches to the non-operating state, the distance that can be compressed is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 when in the non-operating state.

[0277] FIG11 is a modulation transfer function curve diagram of a camera module provided in Example 4 of the present application.

[0278] Among them, the horizontal axis in Figure 11 represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridional field of view. The F1:Diff.Limit line in the figure is shown as the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. It can be seen from Figure 11 that the camera module provided in Example 4 of the present application can achieve high-quality imaging.

[0279] Example 5

[0280] FIG12 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 5 of the present application when the lens assembly is in a working state.

[0281] In this embodiment, as shown in FIG12 , the lens assembly 10 includes seven lenses having optical power. The first lens unit 110 includes five lenses having optical power, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The second lens unit 120 includes two lenses having optical power, namely, a sixth lens 16 and a seventh lens 17. 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, the sixth lens 16, and the seventh lens 17 are arranged in order.

[0282] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown), 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 seventh lens 17, a filter 30, and an image sensor 20 are arranged in sequence. Light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in the above order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0283] The first lens 11 may have positive power, the object side surface of the first lens 11 at least the portion corresponding to the optical axis may be convex, and the image side surface of the first lens 11 at least the portion corresponding to the optical axis may be concave.

[0284] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0285] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0286] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0287] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0288] The sixth lens element 16 may have positive power. At least the portion of the object-side surface of the sixth lens element 16 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the sixth lens element 16 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the sixth lens element 16 may be a toric surface.

[0289] The seventh lens element 17 may have negative optical power. At least the portion of the object-side surface of the seventh lens element 17 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the seventh lens element 17 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the seventh lens element 17 may be a toric surface.

[0290] When the lens assembly 10 is in an active state, as shown in FIG12 , a significant distance is maintained along the optical axis between the object-side surface of the fifth lens element 15 in the first lens unit 110 and the image-side surface of the sixth lens element 16 in the second lens unit 120. This allows the lens assembly 10 to achieve high-quality imaging with a large aperture and a large target area. When the lens assembly 10 switches from an active state to a non-active state, all of the lenses in the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between them and reducing the length of the lens assembly 10 and the camera module 101.

[0291] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in operation.

[0292] The half-image height IMH of the lens assembly 10 is 8.15 mm, the aperture number F# of the lens assembly 10 is 2.00, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=4.075 mm.

[0293] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 3.288 mm, the total optical length TTL of the lens assembly 10 is 12.288 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.27.

[0294] The focal length EFL of the lens assembly 10 is 9.21 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.36.

[0295] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=0.989.

[0296] The ratio of the half-image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.663.

[0297] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.75.

[0298] The half field of view HFOV of the lens assembly 10 is 42°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.29 mm.

[0299] Table 5.1 shows the optical parameters of each lens in a camera module provided in Example 5 of the present application.

[0300] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0301] For details of S1-S16, thickness, etc., please refer to the first embodiment and will not be described in detail in this embodiment.

[0302] Table 5.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 5 of the present application.

[0303] As shown in Table 5.2, all lenses in the lens assembly 10 are aspherical lenses, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0304] Wherein, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0305] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 5.3 below.

[0306] Table 5.3 shows the optical parameters of a camera module provided in Example 5 of the present application.

[0307] As can be seen from Table 5.3, the lens assembly 10 provided in Example 5 of the present application can achieve the characteristics of a large aperture and a large target area when in operation, which is beneficial for improving the imaging quality and effect of the camera module 101. In addition, when the lens assembly 10 switches to the non-operating state, the distance that can be compressed is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 when in the non-operating state.

[0308] FIG13 is a modulation transfer function curve diagram of a camera module provided in Example 5 of the present application.

[0309] Among them, the horizontal axis in Figure 13 represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridional field of view. The F1:Diff.Limit line in the figure is shown as the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. It can be seen from Figure 13 that the camera module provided in Example 5 of the present application can achieve high-quality imaging.

[0310] Example 6

[0311] FIG14 is a schematic diagram of a simulation structure of a lens assembly in a camera module provided in Example 6 of the present application when the lens assembly is in a working state.

[0312] In this embodiment, as shown in FIG14 , the lens assembly 10 includes seven lenses having optical power. The first lens unit 110 includes five lenses having optical power, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The second lens unit 120 includes two lenses having optical power, namely, a sixth lens 16 and a seventh lens 17. 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, the sixth lens 16, and the seventh lens 17 are arranged in order.

[0313] That is, in the camera module 101, along the direction of the optical axis L, from the object side to the image side, an aperture (not shown), 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 seventh lens 17, a filter 30, and an image sensor 20 are arranged in sequence. Light entering the camera module 101 passes through the lens assembly 10 and the filter 30 in the above order and is irradiated onto the image sensor 20, ultimately forming an image on the photosensitive surface of the image sensor 20.

[0314] The first lens 11 may have positive power, the object side surface of the first lens 11 at least corresponding to the optical axis may be convex, and the image side surface of the first lens 11 at least corresponding to the optical axis may be concave.

[0315] The second lens 12 may have negative optical power, and at least a portion of the object side surface of the second lens 12 corresponding to the optical axis may be a concave surface, and at least a portion of the image side surface of the second lens 12 corresponding to the optical axis may be a concave surface.

[0316] The third lens 13 may have positive power, and at least a portion of the object-side surface of the third lens 13 corresponding to the optical axis may be a convex surface, and at least a portion of the image-side surface of the third lens 13 corresponding to the optical axis may be a concave surface.

[0317] The fourth lens 14 may have negative optical power, and at least a portion of the object-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface, and at least a portion of the image-side surface of the fourth lens 14 corresponding to the optical axis may be a concave surface.

[0318] The fifth lens 15 may have positive power, and at least a portion of the object side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface, and at least a portion of the image side surface of the fifth lens 15 corresponding to the optical axis may be a convex surface.

[0319] The sixth lens element 16 may have positive power. At least the portion of the object-side surface of the sixth lens element 16 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the sixth lens element 16 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the sixth lens element 16 may be a toric surface.

[0320] The seventh lens element 17 may have negative optical power. At least the portion of the object-side surface of the seventh lens element 17 corresponding to the optical axis may be convex, and at least the portion of the image-side surface of the seventh lens element 17 corresponding to the optical axis may be concave. At least one of the object-side surface and the image-side surface of the seventh lens element 17 may be a toric surface.

[0321] When the lens assembly 10 is in an active state, as shown in FIG14 , a significant distance is maintained along the optical axis between the object-side surface of the fifth lens element 15 in the first lens unit 110 and the image-side surface of the sixth lens element 16 in the second lens unit 120. This allows the lens assembly 10 to achieve high-quality imaging with a large aperture and a large target area. When the lens assembly 10 switches from an active state to a non-active state, all of the lenses in the first lens unit 110 can move along the optical axis toward the second lens unit 120, compressing the distance between them and reducing the length of the lens assembly 10 and the camera module 101.

[0322] The following are the optical parameters and performances of the lens assembly 10 and each lens when the lens assembly 10 is in operation.

[0323] The half-image height IMH of the lens assembly 10 is 8.32 mm, the aperture number F# of the lens assembly 10 is 1.71, and the ratio of the half-image height IMH of the lens assembly 10 to the aperture number F# of the lens assembly 10 is IMH / F#=4.865 mm.

[0324] The axial spacing GD between the first lens unit 110 and the second lens unit 120 is 2.7 mm, the total optical length TTL of the lens assembly 10 is 12.15 mm, and the ratio of the axial spacing GD between the first lens unit 110 and the second lens unit 120 to the total optical length TTL of the lens assembly 10 is GD / TTL=0.22.

[0325] The focal length EFL of the lens assembly 10 is 8.82 mm, and the ratio of the distance GD between the first lens unit 110 and the second lens unit 120 on the optical axis to the focal length EFL of the lens assembly 10 is GD / EFL=0.306.

[0326] The ratio of the focal length EFL1 of the first lens unit 110 to the focal length EFL of the lens assembly 10 is EFL1 / EFL=1.02.

[0327] The ratio of the half-image height IMH of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is IMH / TTL=0.685.

[0328] The ratio of the focal length EFL of the lens assembly 10 to the total optical length TTL of the lens assembly 10 is EFL / TTL=0.726.

[0329] The half field of view HFOV of the lens assembly 10 is 43°, and the focal length EFL of the lens assembly 10 and the maximum half field of view HFOV of the lens assembly 10 satisfy EFL*tan(HFOV)=8.22 mm.

[0330] Table 6.1 shows the optical parameters of each lens in a camera module provided in Example 6 of the present application.

[0331] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the third lens 13, L4 is the fourth lens 14, L5 is the fifth lens 15, L6 is the sixth lens 16, L7 is the seventh lens 17, and IR is the filter 30.

[0332] For details of S1-S16, thickness, etc., please refer to the first embodiment and will not be described in detail in this embodiment.

[0333] Table 6.2 shows the aspheric coefficients of each lens in a lens assembly provided in Example 6 of the present application.

[0334] As shown in Table 6.2, all lenses in the lens assembly 10 are aspherical lenses, and the lens assembly 10 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 10 can be calculated using the following aspherical surface formula:

[0335] Wherein, z is the aspheric surface sag, r is the radial coordinate of the aspheric surface, c is the vertex spherical curvature of the aspheric surface, K is the cone coefficient, i is the aspheric surface coefficient term, in this embodiment, i is 30, and Ai represents the i-th order aspheric surface coefficient.

[0336] The optical parameters of the camera module 101 composed of the above lenses can be seen in Table 6.3 below.

[0337] Table 6.3 shows the optical parameters of a camera module provided in Example 6 of the present application.

[0338] As can be seen from Table 6.3, the lens assembly 10 provided in Example 6 of the present application can achieve the characteristics of a large aperture and a large target area when in operation, which is beneficial for improving the imaging quality and effect of the camera module 101. In addition, when the lens assembly 10 switches to the non-operating state, the distance that can be compressed is relatively large, which can achieve the thinning of the lens assembly 10 and the camera module 101 when in the non-operating state.

[0339] FIG15 is a modulation transfer function curve diagram of a camera module provided in Example 6 of the present application.

[0340] Among them, the horizontal axis in Figure 15 represents different frequencies, and the vertical axis represents modulation contrast, which can reflect the imaging resolution of different spatial frequencies. The solid line in the figure represents the sagittal field of view, and the dotted line in the figure represents the meridional field of view. The F1:Diff.Limit line in the figure is shown as the limit curve of high-quality imaging. The closer to the limit curve, the better the imaging quality. It can be seen from Figure 15 that the camera module provided in Example 6 of the present application can achieve high-quality imaging.

[0341] It should be noted that the numerical values ​​and numerical ranges involved in the embodiments of the present application are approximate values ​​and may have a certain range of errors. Those skilled in the art may consider such errors to be negligible.

[0342] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances. The terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0343] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lens assembly, characterized in that: It includes at least a first lens unit and a second lens unit arranged in sequence from the object side to the image side along the optical axis. The first lens unit and the second lens unit each include a lens with a focal power, and the number of lenses in the first lens unit is multiple; When the lens assembly is in the working state, the lens assembly satisfies the conditional formula: IMH / F# > 4.0, where IMH is the semi-image height of the lens assembly and F# is the f-number of the lens assembly; When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.2 < GD / TTL < 0.5, where GD is the spacing between the first lens unit and the second lens unit on the optical axis, and TTL is the total optical length of the lens assembly; The first lens unit is movably arranged along the optical axis, and all the lenses of the first lens unit move along the optical axis towards the second lens unit to switch the lens assembly from the working state to the non-working state.

2. The lens assembly according to claim 1, characterized in that: When the lens assembly is in the working state, the f-number of the lens assembly satisfies: 1.1 < F# < 2.

3. The lens assembly according to claim 1 or 2, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.20 < GD / EFL < 0.60, where EFL is the focal length of the lens assembly.

4. The lens assembly according to any one of claims 1 to 3, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.9 < EFL1 / EFL < 1.1, where EFL1 is the focal length of the first lens unit.

5. The lens assembly according to any one of claims 1 to 4, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: IMH / TTL < 0.

7.

6. The lens assembly according to any one of claims 1 to 5, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: 0.6 < EFL / TTL < 0.

9.

7. The lens assembly according to any one of claims 1 to 6, characterized in that: When the lens assembly is in the working state, the lens assembly also satisfies the conditional formula: EFL * tan(HFOV) ≥ 8.00 mm, where HFOV is the semi-field of view angle of the lens assembly.

8. The lens assembly according to any one of claims 1 to 7, characterized in that: The number of lenses in the first lens unit is greater than or equal to 4.

9. The lens assembly according to any one of claims 1 to 8, characterized in that: The number of lenses in the second lens unit is less than or equal to 3.

10. The lens assembly according to any one of claims 1 to 9, characterized in that: It further includes an aperture, and the aperture is located on the side of the first lens unit facing the object side; The aperture is a variable aperture with a variable diameter.

11. The lens assembly according to any one of claims 1 to 10, characterized in that: The lenses of the first lens unit include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, and the lenses of the second lens unit include a sixth lens and a seventh lens; The first lens, the fifth lens, and the sixth lens each have a positive focal power, and the second lens, the fourth lens, and the seventh lens each have a negative focal power.

12. The lens assembly according to claim 11, characterized in that: At least one of the object side surface and the image side surface of the sixth lens is a toroidal surface; At least one of the object side surface and the image side surface of the seventh lens is a toroidal surface.

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

14. An electronic device, characterized in that: It at least includes a housing and the camera module according to claim 13 above, and the camera module is arranged on the housing; When the lens assembly is in working state, the first lens unit of the lens assembly is at least partially located outside the housing; When the lens assembly switches from the working state to the non-working state, the first lens unit moves along the optical axis toward the inside of the housing.

Images