Zoom lens, lens module, and electronic device

Abstract

A zoom lens (10), a lens module (300), and an electronic device (1000). From an object side to an image side, the zoom lens (10) comprises a first lens group (G1), a second lens group (G2), a third lens group (G3), a fourth lens group (G4), a fifth lens group (G5), and a sixth lens group (G6). The first lens group (G1) has positive focal power, the second lens group (G2) has negative focal power, the third lens group (G3) has positive focal power, the fourth lens group (G4) has positive focal power, the fifth lens group (G5) has negative focal power, and the sixth lens group (G6) has positive focal power. The sixth lens group (G6) comprises at least two lenses, the at least two lenses comprise at least one aspheric lens, the aspheric lens of the sixth lens group (G6) has at least one aspheric surface in the optical axis direction, and the aspheric surface has at least two inflection points. The zoom lens (10) satisfies the following relational expressions: f_t / f_w≥8, and |diy|<10％, so as to reduce the volume occupied by the zoom lens (10) while obtaining a large zoom ratio and small distortion.

Description

Zoom lenses, lens modules and electronic devices

[0001] This application claims priority to Chinese patent application filed on January 27, 2025, with application number 202510127977.8 and title "Zoom Lens, Lens Module and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

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

[0003] With the increasingly diverse needs in the photography field, lenses that can simultaneously handle multiple shooting scenarios, be compact and lightweight, and possess excellent quality are in high demand in the market. This has led to the development of zoom lenses. Zoom lenses achieve focusing and shooting at different focal lengths, apertures, and object distances by changing the position of the lens and coordinating with other components, enabling shooting effects in various scenarios and thus meeting the needs of the general public. While some zoom lenses can achieve large zoom ratios, this also results in significant distortion, which negatively impacts image quality. To achieve larger zoom ratios and lower distortion, some zoom lenses use a greater number of lens groups, such as seven or more. However, increasing the number of lens groups increases the size of the zoom lens. Summary of the Invention

[0004] This application provides a zoom lens, a lens module, and an electronic device to reduce the size occupied by the zoom lens while achieving a large zoom ratio and low distortion.

[0005] In a first aspect, one embodiment of this application provides a zoom lens, from the object side to the image side, comprising a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group, and a sixth lens group. At least one of the first, second, third, fourth, fifth, and sixth lens groups is movable along the optical axis to achieve zoom. The first lens group has positive optical power, the second lens group has negative optical power, the third lens group has positive optical power, the fourth lens group has positive optical power, the fifth lens group has negative optical power, and the sixth lens group has positive optical power. The sixth lens group includes at least two lenses, each including at least one aspherical lens. The aspherical lens of the sixth lens group has at least one aspherical surface in the optical axis direction, and the aspherical surface has at least two inflection points.

[0006] Zoom lenses satisfy the following relationships: f_t / f_w≥8, |diy|<10%,

[0007] f_t is the focal length of the zoom lens at the telephoto end, f_w is the focal length of the zoom lens at the wide-angle end, and |diy| is the maximum absolute value of the distortion value of the zoom lens at different zoom positions.

[0008] The zoom lens provided in this application has a first lens group with positive optical power, a second lens group with negative optical power, a third lens group with positive optical power, a fourth lens group with positive optical power, a fifth lens group with negative optical power, and a sixth lens group with positive optical power, so as to achieve high magnification zoom. Furthermore, the combined use of positive and negative lenses from multiple lens groups can better resolve chromatic aberration issues.

[0009] Since the aspherical lens in the sixth lens group has at least two inflection points, the configuration of the aspherical elements allows for adjustment of the off-axis ray angle, achieving a smaller distortion design and a larger aperture, which is beneficial for improving the image quality of the zoom lens. The zoom lens provided in this application, with a configuration of six lens groups (i.e., fewer than seven lens groups), can achieve f_t / f_w ≥ 8 and |diy| < 10%. This means that the zoom lens achieves a large zoom ratio and low distortion while using a smaller number of lens groups, which helps reduce the overall optical length and volume of the zoom lens.

[0010] According to the first aspect, in one possible implementation, the number of inflection points of the aspherical surface is greater than 2. Increasing the number of inflection points can enhance the zoom lens's ability to correct distortion and improve image quality.

[0011] According to the first aspect, in one possible implementation, the zoom lens also satisfies the following relationship: TL_tele / f_tele < 1.4.

[0012] Where TL_tele is the total length of the zoom lens at the telephoto end, and f_tele is the focal length of the zoom lens at the telephoto end.

[0013] In this possible implementation, TL_tele / f_tele < 1.4, which means that the total length of the zoom lens in this application will be shorter than that of an optical lens with the same focal length, which is beneficial for the miniaturization of the zoom lens.

[0014] According to the first aspect, in one possible implementation, at least one lens in the sixth lens group has positive optical power.

[0015] A lens with positive optical power can converge the light rays from the lens groups on the side of the object in front of the lens with positive optical power, which is beneficial to reducing the size of the zoom lens in the direction perpendicular to the optical axis and to the miniaturization of zoom lenses.

[0016] According to the first aspect, in one possible implementation, the Abbe number of the lens with positive optical power in the sixth lens group satisfies the following relationship: Vd_g6>30, 1.40 <Nd_g6<2.1,

[0017] Wherein, Vd_g6 is the Abbe number of the lens with positive optical power in the sixth lens group, and Nd_g6 is the refractive index number of the lens with positive optical power in the sixth lens group.

[0018] In this possible implementation, by limiting the refractive index Nd of the lens with positive optical power in the sixth lens group to the range of 1.4 to 2.1 and the Abbe number Vd to be greater than 30, the lens with positive optical power in the sixth lens group has a lower refractive index and a higher Abbe number, resulting in higher light transmittance. This leads to a stronger light-gathering and adjustment direction from the lens with positive optical power in the sixth lens group, resulting in higher optical quality and sharper images captured by the zoom lens.

[0019] According to the first aspect, in one possible implementation, the lens closest to the object side of the sixth lens group has positive optical power.

[0020] In this possible implementation, a lens with positive optical power can converge light. Setting the lens closest to the object side of the sixth lens group as a positive optical power lens, that is, converging the light on the object side of the sixth lens group, is beneficial to improving the quality of light entering the sixth lens group and reducing the size of the zoom lens in the direction perpendicular to the optical axis, which is beneficial to the miniaturization of the zoom lens.

[0021] According to the first aspect, in one possible implementation, at different focal lengths, the fifth lens group is used to move in the direction of the optical axis for focusing.

[0022] In the object-to-image direction, the fifth lens group is closer to the image side than the first, second, third, and fourth lens groups. By moving the fifth lens group to focus, it is beneficial for the lens group on the object side of the fifth lens group to zoom, so as to achieve a larger zoom range.

[0023] According to the first aspect, in one possible implementation, the fifth lens group has the fewest lenses among the first, second, third, fourth, fifth, and sixth lens groups, in order to achieve a lighter and simpler focusing structure.

[0024] According to the first aspect, in one possible implementation, the zoom lens satisfies the following relationship: -6 <f_g5 / f_w<-2, 0.5<f_g6 / f_t<1.8,

[0025] Among them, \(f_{g5}\) is the focal length of the fifth lens group, and \(f_{g6}\) is the focal length of the sixth lens group.

[0026] If the focal length of the lens group is too long, it will cause a large zoom movement amount of the lens group, which is not conducive to the miniaturization of the zoom lens. If the focal length of the lens group is too short, the lens needs to have a stronger ability to adjust light. If the adjustment is not in place, it will affect the resolution of the entire zoom lens.

[0027] In this possible implementation, since \(-6 < f_{g5} / f_w < -2\) and \(0.5 < f_{g6} / f_t < 1.8\), the focal lengths of the fifth lens group and the sixth lens group are limited within a suitable range, which is beneficial to reducing the length of the zoom lens in the optical axis direction and will not cause loss of resolution.

[0028] According to the first aspect, in a possible implementation, the zoom lens further includes an aperture, and the aperture is located between any two lenses of the zoom lens.

[0029] In this possible implementation, the aperture is used to limit the light incident amount of the zoom lens and reduce the stray light in the zoom lens to change the brightness of the imaging.

[0030] According to the first aspect, in a possible implementation, in the optical axis direction, the aperture is located between the second lens group and the third lens group.

[0031] In this possible implementation, after considering the trade-off between optical quality and lens size, the aperture can achieve the effect of the best aperture at the telephoto end of the zoom lens. In addition, when the aperture is located between the second lens group and the third lens group, it is convenient for the correction of aperture aberration.

[0032] According to the first aspect, in a possible implementation, the aperture diameter of the aperture can change.

[0033] In this possible implementation, the aperture diameter of the aperture can change to adjust the light incident amount of the zoom lens. The zoom lens provided in this application realizes zooming through the focal length distribution of each lens group, the position movement of each lens group, and the change of the aperture diameter.

[0034] In the second aspect, an embodiment of this application further provides a lens module. The zoom lens includes an image sensor and a zoom lens according to any one of the first aspect. The zoom lens is used to image light onto the image sensor.

[0035] According to the first aspect, in a possible implementation, the lens module further includes a filter, and the filter is located between the image sensor and the sixth lens group in the optical axis direction.

[0036] The light reflected from the subject is refracted by the zoom lens, filtered, and then incident on the image sensor to form an image.

[0037] Thirdly, according to one embodiment of this application, there is also an electronic device, which includes a housing and a zoom lens according to the second aspect, the zoom lens being mounted on the housing. Attached Figure Description

[0038] Figure 1 is a schematic diagram of the structure of an electronic device provided in one embodiment of this application;

[0039] Figure 2 is a partial cross-sectional view of one embodiment of the electronic device shown in Figure 1 at line AA;

[0040] Figure 3 is a simplified schematic diagram of part of the structure of the lens module provided in the first embodiment of this application when it is located at the wide-angle end;

[0041] Figure 4 is a schematic diagram of the inflection point location of an aspherical surface;

[0042] Figure 5 is a simplified schematic diagram of part of the structure of the lens module provided in the first embodiment of this application when it is located in the middle focal length;

[0043] Figure 6 is a simplified schematic diagram of part of the structure of the lens module provided in the first embodiment of this application when it is located at the telephoto end;

[0044] Figure 7A is a simulation diagram of the spherical aberration effect of the lens module in the first embodiment focusing at infinity at the wide-angle end;

[0045] Figure 7B is a simulation diagram of the astigmatism effect of the lens module in the first embodiment focusing at infinity at the wide-angle end.

[0046] Figure 7C is a simulation diagram of the distortion and phase difference effect of the lens module in the first embodiment when focusing at infinity at the wide-angle end;

[0047] Figure 8A is a simulation diagram of the spherical aberration effect of the lens module in the first embodiment focusing at infinity in the middle focal length.

[0048] Figure 8B is a simulation diagram of the astigmatism effect of the lens module in the first embodiment focusing at infinity in the middle focal length.

[0049] Figure 8C is a simulation diagram of the distortion and phase difference effect of the lens module in the first embodiment focusing at infinity in the middle focal length.

[0050] Figure 9A is a simulation diagram of the spherical aberration effect of the lens module in the first embodiment focusing at infinity at the telephoto end;

[0051] Figure 9B is a simulation diagram of the astigmatism effect when the lens module of the first embodiment is focused at infinity at the telephoto end.

[0052] Figure 9C is a simulation diagram of the distortion and phase difference effect of the lens module in the first embodiment when focusing at infinity at the telephoto end.

[0053] Figure 10 is a simplified schematic diagram of part of the structure of the lens module provided in the second embodiment of this application when it is located at the wide-angle end;

[0054] Figure 11 is a simplified schematic diagram of part of the structure of the lens module provided in the second embodiment of this application when it is located in the middle focal length;

[0055] Figure 12 is a simplified schematic diagram of part of the structure of the lens module provided in the second embodiment of this application when it is located at the telephoto end;

[0056] Figure 13A is a simulation diagram of the spherical aberration effect of the lens module in the second embodiment focusing at infinity at the wide-angle end;

[0057] Figure 13B is a simulation diagram of the astigmatism effect when the lens module of the second embodiment is focused at infinity at the wide-angle end.

[0058] Figure 13C is a simulation diagram of the distortion and phase difference effect of the lens module in the second embodiment when focusing at infinity at the wide-angle end;

[0059] Figure 14A is a simulation diagram of the spherical aberration effect of the lens module in the second embodiment focusing at infinity in the middle focal length.

[0060] Figure 14B is a simulation diagram of the astigmatism effect of the lens module in the second embodiment focusing at infinity in the middle focal length.

[0061] Figure 14C is a simulation diagram of the distortion and phase difference effect of the lens module in the second embodiment when focusing at infinity in the middle focal length.

[0062] Figure 15A is a simulation diagram of the spherical aberration effect of the lens module in the second embodiment focusing at infinity at the telephoto end;

[0063] Figure 15B is a simulation diagram of the astigmatism effect when the lens module of the second embodiment is focused at infinity at the telephoto end.

[0064] Figure 15C is a simulation diagram of the distortion and phase difference effect of the lens module in the second embodiment when focusing at infinity at the telephoto end.

[0065] Figure 16 is a simplified schematic diagram of part of the structure of the lens module provided in the third embodiment of this application when it is located at the wide-angle end;

[0066] Figure 17 is a simplified schematic diagram of part of the structure of the lens module provided in the third embodiment of this application when it is located in the middle focal length;

[0067] Figure 18 is a simplified schematic diagram of part of the structure of the lens module provided in the third embodiment of this application when it is located at the telephoto end;

[0068] Figure 19A is a simulation diagram of the spherical aberration effect of the lens module in the third embodiment focusing at infinity at the wide-angle end;

[0069] Figure 19B is a simulation diagram of the astigmatism effect when the lens module of the third embodiment is focused at infinity at the wide-angle end.

[0070] Figure 19C is a simulation diagram of the distortion and phase difference effect of the lens module in the third embodiment when focusing at infinity at the wide-angle end.

[0071] Figure 20A is a simulation diagram of the spherical aberration effect of the lens module in the third embodiment focusing at infinity in the middle focal length.

[0072] Figure 20B is a simulation diagram of the astigmatism effect of the lens module in the third embodiment focusing at infinity in the middle focal length.

[0073] Figure 20C is a simulation diagram of the distortion and phase difference effect of the lens module in the third embodiment focusing at infinity in the middle focal length.

[0074] Figure 21A is a simulation diagram of the spherical aberration effect of the lens module in the third embodiment focusing at infinity at the telephoto end;

[0075] Figure 21B is a simulation diagram of the astigmatism effect when the lens module of the third embodiment is focused at infinity at the telephoto end.

[0076] Figure 21C is a simulation diagram of the distortion and phase difference effect of the lens module in the third embodiment when focusing at infinity at the telephoto end.

[0077] Figure label: 1000 - Electronic device; 100 - Screen; 200 - Housing; 300 - Lens module; 400 - Image processor; 500 - Analog-to-digital converter; 10 - Zoom lens; 20 - Image sensor; 30 - Filter; 40 - Cover plate; G1 - First lens group; G2 - Second lens group; G3 - Third lens group; G4 - Fourth lens group; G5 - Fifth lens group; G6 - Sixth lens group; 01, 02, 03 - Inflection point; STO - Aperture stop; L1 - First lens; L2 - Second lens; L3 - Third lens; L4 - Fourth lens; L5 - Fifth lens; L6 - Sixth lens; L7 - Seventh lens; L8 - Eighth lens; L9 - Ninth lens; L10 - Tenth lens; L11 - Eleventh lens; L12 - Twelfth lens; L13 - Thirteenth lens; L14 - Fourteenth lens; L15 - Fifteenth lens; L16 - Sixteenth lens; L17 - Seventeenth lens. Detailed Implementation

[0078] For ease of understanding, the technical terms used in this application will be explained and described below.

[0079] Optical zoom refers to changing the focal length by physically moving lens elements, thus magnifying or reducing the size of the image being captured. Optical zoom does not easily lose image quality because it alters the physical structure of the zoom lens.

[0080] Focusing refers to adjusting the position of the zoom lens to ensure that the subject is in sharp focus without changing the system's focal length.

[0081] The optical axis is an axis that passes through the center of each lens.

[0082] The object side is the side where the object is located, with the lens as the boundary. The surface of the lens closest to the object side is called the object-side surface.

[0083] The image side, defined by the lens, is the side where the image of the object is located. The surface of the lens closest to the image side is called the image-side surface.

[0084] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the perpendicular distance from the optical center of a lens or optical component to the focal plane when a distant object is projected into a sharp image. From a practical perspective, it can be understood as the distance from the center of the lens to the image plane. For prime lenses, the position of their optical center remains fixed. The focal length of a zoom lens (effect focal length) is defined as the distance from the center of the zoom lens to the focal point.

[0085] Focal power is defined as the difference between the convergence of the image-side beam and the convergence of the object-side beam. It is the reciprocal of the focal length of the lens and characterizes the ability of an optical system to deflect light.

[0086] Positive optical power, also known as positive refractive power, indicates that a lens has a positive focal length, which can focus light rays.

[0087] Negative optical power, also known as negative refractive power, indicates that a lens has a negative focal length, which can diverge light.

[0088] The telescopic end, also known as the telephoto end, is the longer focal length of the lens. It has a narrower angle of view and is used to shoot distant scenes, especially close-ups.

[0089] The focal length at the telescopic end (ft) is defined as the distance from the center of the telescopic end of a zoom lens to the focal point.

[0090] The middle focal length is defined as the intermediate state at the telephoto end.

[0091] The focal length at the middle end (fm) is defined as the distance from the center to the focal point of the zoom lens at the middle focal length.

[0092] The wide end is the shortest focal length of the lens, also known as the short focal length end. It has the largest angle of view and is used for shooting close-ups, especially large-scale close-ups.

[0093] The refractive index (Nd) of a material is defined as the absolute value of the ratio of the speed of light propagating in a material (including visible light) to the speed of light in a vacuum. It is an indicator describing the speed of light propagation and the degree of bending of a material.

[0094] The Abbe number (Vd), also known as the dispersion coefficient, is the ratio of the difference in refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0095] An aperture stop is a physical object in an optical system that limits the beam of light. It can be the edge of a lens, a frame, or a specially designed perforated screen. Its function can be twofold: limiting the beam of light or limiting the size of the field of view (imaging range). The aperture stop that limits the beam of light the most in an optical system is called the aperture stop; the aperture stop that limits the field of view (size) the most is called the field stop.

[0096] Aberrations are the properties of an ideal optical system in the paraxial region. Paraxial rays emitted from a point on an object intersect the image plane at a single point (i.e., the paraxial image point). However, in reality, rays passing through different apertures of a lens rarely intersect perfectly at a single point. Instead, they deviate from the position of the paraxial image point. These differences are collectively referred to as aberrations.

[0097] Spherical aberration is an imaging quality problem in optical systems caused by the different converging abilities of light rays between the center and the edges of a lens. Specifically, spherical aberration refers to the phenomenon where light rays emitted from an on-axis object point, when passing through a spherical lens, fail to converge at a single point on the image plane due to the different converging abilities of the central and peripheral regions of the lens, instead forming a circular blur spot.

[0098] Distortion, also known as image distortion, refers to the degree of distortion in the image formed by an optical system relative to the object itself. Distortion occurs due to the spherical aberration of the aperture. The height of the intersection point between the principal ray from different fields of view and the Gaussian image plane is not equal to the ideal image height; this difference is the distortion. Therefore, distortion only changes the imaging position of an off-axis object point on the ideal plane, causing a distortion in the image shape, but it does not affect the image's sharpness.

[0099] Astigmatism occurs because the object point is not on the optical axis of the optical system, and the emitted beam of light has an angle with the optical axis. After refraction by a lens, the convergence points of the meridional and sagittal beams are not at the same point. That is, the beam cannot be focused on a single point, resulting in an unclear image, hence astigmatism. The meridional and sagittal beams are the names of beams in two perpendicular planes within a rotationally symmetric optical system.

[0100] Total track length (TTL): refers to the total length from the lens barrel head to the imaging plane, and is the main factor that determines the height of the lens module.

[0101] The meridional plane is the plane formed by the principal ray (principal beam) of an object point outside the optical axis and the optical axis.

[0102] The sagittal surface is the plane that passes through the principal ray (principal beam) of an object point outside the optical axis and is perpendicular to the meridional plane.

[0103] Field curvature refers to the difference in optical axis between the position of the sharpest image point after rays from the off-center field of view pass through a zoom lens and the position of the sharpest image point in the center field of view. When a lens has field curvature, the intersection of the entire light beam does not coincide with the ideal image point. Although a sharp image point can be obtained at each specific point, the entire image plane is a curved surface.

[0104] As shown in Figure 1, in some embodiments, the electronic device 1000 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device, augmented reality (AR) glasses, AR headset, virtual reality (VR) glasses or VR headset, or other devices with photography and video recording functions. The electronic device 1000 in the embodiment shown in Figure 1 is illustrated using a mobile phone as an example.

[0105] Figure 2 is a partial cross-sectional view of one embodiment of the electronic device 1000 shown in Figure 1 at line AA.

[0106] As shown in Figure 2, the electronic device 1000 includes a screen 100, a housing 200, a lens module 300, an image processor 400, and an analog-to-digital converter 500. In other embodiments, the electronic device 1000 may include more or fewer structures. For example, when the electronic device 1000 includes more structures, it may also include a circuit board (not shown in the figures). When the electronic device 1000 includes fewer structures, it may not include the screen 100. It is understood that Figures 1 and 2 only schematically show some components included in the electronic device 1000, and the actual shape, size, location, and construction of these components are not limited by Figures 1 and 2.

[0107] For example, the screen 100 can be fixed to the housing 200. The screen 100 can be used to display images to meet the user's needs. The display layer can be a liquid crystal display or an organic light-emitting diode display, etc. The screen 100 and the housing 200 can together enclose the interior of the electronic device 1000. The interior of the electronic device 1000 can be used to house components of the electronic device 1000, such as batteries, receivers, or microphones. The screen 100 can be a flat screen or a curved screen.

[0108] For example, the lens module 300 can be installed inside the housing 200, and the light-incident side of the lens module 300 can be set away from the screen 100 to serve as a rear camera of the electronic device 1000.

[0109] For example, the housing 200 may have a light-transmitting portion 201. The shape of the light-transmitting portion 201 is not limited to the circle shown in Figure 1, but may also be elliptical or irregular in shape. The light-transmitting portion 201 connects the interior of the electronic device 1000 to the exterior of the electronic device 1000. Light from the exterior of the electronic device 1000 can enter the interior of the electronic device 1000 through the light-transmitting portion 201, and it is dustproof and waterproof. The lens module 300 can collect light from the exterior of the electronic device 1000 through the light-transmitting portion 201 to capture pictures or videos.

[0110] In other embodiments, the light-incident side of the lens module 300 can face the side where the screen 100 is located, serving as a front-facing camera of the electronic device 1000. Both the front and rear cameras can be used for selfies or for the photographer to take pictures of other objects.

[0111] It is understood that the mounting position of the lens module 300 of the electronic device 1000 in the embodiment shown in FIG1 is merely illustrative, and this application does not strictly limit the mounting position of the lens module 300. In some other embodiments, the lens module 300 may also be mounted in other locations on the electronic device 1000, for example, the lens module 300 may be mounted in the upper middle or upper right corner of the back of the electronic device 1000. In some other embodiments, the electronic device 1000 may include a terminal body and an auxiliary component that can rotate, move, or be detached relative to the terminal body, and the lens module 300 may also be disposed on the auxiliary component.

[0112] For example, the image processor 400 can be communicatively connected to the lens module 300. The image processor 400 can acquire and process image data from the lens module 300. The communication connection between the lens module 300 and the image processor 400 can include data transmission via electrical connections such as wiring, or data transmission via coupling. It is understood that the lens module 300 and the image processor 400 can also be communicatively connected through other methods capable of data transmission.

[0113] The image processor 400 may include multiple processing modules that can convert the raw image signals captured by the lens module 300 into image information, and transmit the processed information to the display module of the screen for display of the image or video. The image processor 400 may be an image processing chip or a digital signal processing chip, used to adjust the color of the image, perform noise reduction processing, etc., to further improve the image quality.

[0114] In this embodiment, the working principle of the lens module 300 in the electronic device 1000 is as follows: light reflected from the subject enters the interior of the lens module 300, generating an optical image that is projected onto the surface of the image sensor of the lens module 300. The image sensor converts the optical image into an electrical signal, i.e., an analog image signal, and transmits the converted analog image signal to the analog-to-digital converter 500, which converts it into a digital image signal for the image processor 400. The image processor 400 can process and convert the original image signal captured by the lens module 300 to form image information, and transmit the processed information to the screen 100 for display of the image or video. In other embodiments, the electronic device 1000 may also include a memory (not shown in the figures). The image processor 400 can process the digital image signal and transmit the image to the memory so that the image can be retrieved from the memory and displayed on the screen 100 at any time when it is needed to view the image.

[0115] Figure 1 is merely a schematic diagram illustrating the structure of an electronic device 1000. The dimensions, quantity, and position of the lens module 300, image processor 400, and analog-to-digital converter 500 shown in Figure 1 are only schematic representations and can be adjusted as needed; this application does not impose any limitations on them.

[0116] It is understood that the number of lens modules 300 can be one or at least two. When there is only one lens module 300, it can be used for either a front-facing camera or a rear-facing camera. When there are at least two lens modules 300, these two lens modules 300 can be, respectively, telephoto lens modules 300, super telephoto lens modules 300, etc., to meet different shooting needs; this application does not limit this.

[0117] As shown in Figure 1, when a user of the electronic device 1000 takes a picture, the lens module 300, image processor 400, and analog-to-digital converter 500 are in operation. The light reflected from the object being photographed is sequentially captured by the lens module 300, converted by the analog-to-digital converter 500, and converted by the image processor 400 to form image information, which is then displayed on the screen 100. In other embodiments, the shooting operation interface of the electronic device 1000 can also be in other forms. This application does not specifically limit the form. For example, the user can operate on the screen 100 to issue operating commands to the electronic device 1000, thereby changing the zoom ratio of the lens module 300.

[0118] As shown in Figure 3, exemplarily, the lens module 300 may include a zoom lens 10, an image sensor 20, and a filter 30. The zoom lens 10 is used to image light onto the image sensor 20. Light reflected from the subject is refracted by the zoom lens 10, passes through the filter 30, and then enters the image sensor 20 to form an image. It is understood that Figure 3 and the related figures below only schematically show some components included in the lens module 300, and the actual shape, size, position, and construction of these components are not limited to Figure 2 and the figures below. It is understood that the lens module 300 may also include fewer or more structures. For example, the lens module 300 may include fewer structures; exemplarily, the lens module 300 may not include the filter 30. The lens module 300 may include more structures, such as a cover plate 40 located between the filter 30 and the image sensor 20 in the optical axis direction, or a lens support, etc. (not shown in the figures).

[0119] The image sensor 20 can be located on the image side of the zoom lens 10. The image sensor 20 is a semiconductor chip, also known as a photosensitive chip. The surface of the image sensor 20 contains hundreds of thousands to millions of photodiodes, which generate electrical charges when exposed to light. The image sensor 20 utilizes the photoelectric conversion function of photoelectric devices to convert the light image on its photosensitive surface into an electrical signal proportional to the light image. The photosensitive surface of the image sensor 20 can be positioned facing the zoom lens 10. The image sensor 20 can be a charge-coupled device (CCD), complementary metal-oxide-semiconductor (CMOS), phototransistor, or thin-film transistor, etc.

[0120] Exemplarily, the filter 30 can be located between the zoom lens 10 and the image sensor 20. Light passing through the zoom lens 10 is incident on the filter 30 and filtered by the filter 30 before being imaged on the image sensor 20. Exemplarily, the filter 30 can be an infrared filter 30. The filter 30 can eliminate unwanted wavelengths of light projected onto the image sensor 20, preventing the image sensor 20 from producing false colors or ripples, thereby improving its effective resolution and color reproduction. This application does not strictly limit the specific embodiments of the structure or component used to implement the filter.

[0121] In some embodiments, the lens module 300 may omit the filter 30 and instead achieve filtering by surface treatment or material treatment of at least one optical element of the zoom lens 10. This application does not strictly limit the specific embodiments of the structural components or structures used to achieve filtering.

[0122] The following is an example illustrating the implementation scheme of the zoom lens 10 in the lens module 300 shown in Figure 3.

[0123] Referring again to Figure 3, from the object side to the image side, the zoom lens 10 includes a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, and a sixth lens group G6. At least one of the first lens group G1, second lens group G2, third lens group G3, fourth lens group G4, fifth lens group G5, and sixth lens group G6 can move along the optical axis to achieve zoom. The first lens group G1 has positive optical power, the second lens group G2 has negative optical power, the third lens group G3 has positive optical power, the fourth lens group G4 has positive optical power, the fifth lens group G5 has negative optical power, and the sixth lens group G6 has positive optical power.

[0124] It is understood that Figure 2 and the related figures below only schematically show some of the components included in the zoom lens 10, and the actual shape, size, position and construction of these components are not limited to Figure 2 and the figures below.

[0125] It is understood that the zoom lens 10 may also include fewer or more structures. For example, the zoom lens 10 may include more structures, such as a lens holder (not shown in the figures).

[0126] The sixth lens group G6 includes at least two lenses, and the sixth lens group G6 includes at least one aspherical lens. The aspherical lens of the sixth lens group G6 has at least one aspherical surface in the optical axis direction. Each aspherical surface has at least two inflection points. The zoom lens 10 satisfies the following relationship: f_t / f_w ≥ 8, |diy| < 10%, where f_t is the focal length of the zoom lens 10 at the telephoto end, f_w is the focal length of the zoom lens 10 at the wide-angle end, and |diy| is the maximum absolute value of the distortion value of the zoom lens 10 at different zoom positions.

[0127] An inflection point is a point on a surface where the tilt angle changes direction. The optical axis can be defined as the Z-axis. The tangent of the tilt angle is the distance between two adjacent points on the curve along the Y-axis divided by the distance between these two adjacent points along the Z-axis. The Y-axis is perpendicular to the Z-axis. The positive Z-axis is the direction from the object side to the image side. The positive Y-axis is the positive Z-axis rotated 90 degrees counterclockwise. The inflection point design creates an uneven surface structure on the aspherical surface, which helps reduce distortion in the zoom lens 10.

[0128] The number of inflection points on the aspherical surface of an aspherical lens can be greater than two to enhance the distortion correction capability of the zoom lens 10. For example, the number of inflection points can be 2n+1, where n is a natural number. Referring to Figure 4, Figure 4 exemplarily shows an aspherical lens with three inflection points: inflection point O1, inflection point O2, and inflection point O3. Inflection point O1 is located on the optical axis, while inflection points O2 and O3 are located on opposite sides of the optical axis in the Y-axis direction. For example, in the Y-axis direction, inflection points O2 and O3 are 3.3 mm away from the optical axis.

[0129] The zoom lens 10 provided in this application has a first lens group G1 with positive optical power, a second lens group G2 with negative optical power, a third lens group G3 with positive optical power, a fourth lens group G4 with positive optical power, a fifth lens group G5 with negative optical power, and a sixth lens group G6 with positive optical power, so as to achieve high magnification zoom of the zoom lens 10. Furthermore, the combined use of positive and negative lenses from multiple lens groups can better solve chromatic aberration problems.

[0130] Since the aspherical lens of the sixth lens group G6 has at least two inflection points, the aspherical configuration allows for adjustment of the off-axis ray angle to achieve a small distortion design, which is beneficial for improving the imaging quality of the zoom lens 10. The zoom lens 10 provided in this application, with a configuration of six lens groups (i.e., fewer than seven lens groups), can achieve f_t / f_w ≥ 8 and |diy| < 10%. This means that the zoom lens 10 achieves a large zoom ratio and low distortion while using a smaller number of lens groups, which helps reduce the overall optical length and volume of the zoom lens 10.

[0131] When the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, the fifth lens group G5, and the sixth lens group G6 move independently along the optical axis, the zoom function of the zoom lens 10 can be realized.

[0132] At different focal lengths, the fifth lens group G5 is used to move along the optical axis to achieve focusing of the zoom lens 10. In the object-to-image direction, the fifth lens group G5 is closer to the image side than the first lens group G1, second lens group G2, third lens group G3, and fourth lens group G4. Focusing by moving the fifth lens group G5 facilitates zooming on the object-side lens group of the fifth lens group G5, achieving a longer zoom range. It is understood that the fifth lens group G5 can have the fewest lenses among the six lens groups to achieve a lighter and simpler focusing structure. It is understood that this application is not limited to achieving focusing of the zoom lens 10 by moving the fifth lens group G5 along the optical axis; focusing can also be achieved by moving other lens groups.

[0133] In some embodiments of this application, the zoom lens 10 also satisfies the following relationship: TL_tele / f_tele < 1.4.

[0134] Where TL_tele is the total length of the zoom lens 10 at the telephoto end, and f_tele is the focal length of the zoom lens 10 at the telephoto end. Since TL_tele / f_tele < 1.4, it is beneficial for the miniaturization of the zoom lens 10.

[0135] At least one lens in the sixth lens group G6 has positive optical power. A lens with positive optical power can converge the light rays from the lens groups on the object side of the lens with positive optical power, which is beneficial to reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis and to the miniaturization of the zoom lens 10.

[0136] The Abbe number of the lens with positive optical power in the sixth lens group G6 also satisfies the following relationship: 1.4 <Nd_g6<2.1, Vd_g6> 30,

[0137] Among them, Nd_g6 is the refractive index number of the lens with positive optical power in the sixth lens group G6, and Vd_g6 is the Abbe number of the lens with positive optical power in the sixth lens group G6.

[0138] For example, the range of Nd_g6 can be but is not limited to 1.4 < Nd_g6 < 1.85. Nd_g6 can be 1.45, 1.50, 1.55, 1.60, 1.61, 1.65, 1.70, 1.75, 1.80, 1.83, 1.85, 1.90, 1.95, 2.00, or 2.05, etc. Vd_g6 can be 35, 40, 40.5, 45, 50, 51, 55, 60, 63.2, 65, 70, 75, 80, 85, 90, 91, or 95, etc.

[0139] By restricting the refractive index Nd of the lens with positive optical power in the sixth lens group G6 to be within the range of 1.4 to 2.1 and the Abbe number Vd to be greater than 30, since the refractive index of the lens with positive optical power in the sixth lens group G6 is small and the Abbe number is large, the light transmittance of the lens with positive optical power in the sixth lens group G6 is relatively high. In this way, the direction of light convergence adjustment of the lens with positive optical power in the sixth lens group G6 is relatively strong, and the optical quality of the light passing through the lens with positive optical power in the sixth lens group G6 is relatively high, making the image captured by the zoom lens 10 clearer.

[0140] In other embodiments, Nd_g6 can also satisfy other ranges, and Vd_g6 can also satisfy other ranges. Specifically, this application does not make any limitations.

[0141] In some embodiments of this application, the lens closest to the object side in the sixth lens group G6 has positive optical power. The lens with positive optical power can converge light. Setting the lens closest to the object side in the sixth lens group G6 as a positive optical power lens, that is, converging the light on the object side of the sixth lens group G6, is beneficial to improving the light quality entering the sixth lens group G6 and reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis, which is beneficial to the miniaturization of the zoom lens 10.

[0142] In some embodiments of this application, the zoom lens 10 also satisfies the following relational expressions: -6 < f_g5 / f_w < -2, 0.5 < f_g6 / f_t < 1.8.

[0143] Among them, f_g5 is the focal length of the fifth lens group G5, and f_g6 is the focal length of the sixth lens group G6.

[0144] If the focal length of the lens group is too long, it will cause a relatively large zoom movement amount of the lens group, which is not conducive to the miniaturization of the zoom lens. If the focal length of the lens group is too short, the lens needs to have a stronger ability to adjust light. If the adjustment is not in place, it will affect the resolution of the entire zoom lens.

[0145] Since -6 < f_g5 / f_w < -2 and 0.5 < f_g6 / f_t < 1.8, the focal lengths of the fifth lens group G5 and the sixth lens group G6 are limited within appropriate ranges, which is beneficial to reducing the length of the zoom lens 10 on the optical axis and will not cause loss of resolution.

[0146] Exemplarily, the lens materials of the lenses of the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, the fifth lens group G5, and the sixth lens group G6 can be resin. It can be understood that the weight of the lens is relatively small, which is beneficial to reducing the overall weight of the zoom lens 10. In addition, the lens has good resistance to vibration and shock.

[0147] Exemplarily, the lens materials of the lenses can also be glass. It can be understood that the lens has excellent optical transparency, refractive index, and chemical stability, is not easily scratched or deformed, and is beneficial to the zoom lens 10 to achieve clear and accurate imaging.

[0148] In other embodiments, other materials can also be used for the lens. Specifically, the present application does not make any limitations.

[0149] Please refer to FIG. 3 again. The zoom lens 10 further includes an aperture stop STO. In the optical axis direction, the aperture stop STO can be located between any two lenses. The aperture stop STO can be an aperture diaphragm STO, and the aperture diaphragm STO is used to limit the light incident amount of the zoom lens 10 and reduce the stray light in the zoom lens 10 to change the brightness of the imaging.

[0150] In some embodiments of the present application, in the optical axis direction, the aperture stop STO is located between the second lens group G2 and the third lens group G3. After considering the trade-off between optical quality and lens size, the aperture stop STO can achieve the best aperture effect at the telephoto end of the zoom lens 10. In addition, when the aperture stop STO is located between the second lens group G2 and the third lens group G3, it is convenient to correct the aberration of the aperture stop STO.

[0151] In some embodiments of the present application, the aperture of the aperture stop STO can change to adjust the light incident amount of the zoom lens 10. For the zoom lens 10 provided in the present application, zooming is achieved by allocating the focal lengths of each lens group, moving the positions of each lens group, and cooperating with the change of the aperture of the aperture stop STO.

[0152] In other embodiments, the zoom lens 10 may not include an aperture stop STO. It can be understood that FIG. 3 only schematically shows some components of the zoom lens 10, and the actual shapes, actual sizes, and actual structures of these components are not limited by FIG. 3.

[0153] In a first embodiment of this application, the first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3. The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The third lens group G3 includes an eighth lens L8, a ninth lens L9, and a tenth lens L10. The fourth lens group G4 includes an eleventh lens L11 and a twelfth lens L12. The fifth lens group G5 includes a thirteenth lens L13. The sixth lens group G6 includes a fourteenth lens L14, a fifteenth lens L15, and a sixteenth lens L16. In the optical axis direction, the aperture stop STO is located between the seventh lens L7 and the eighth lens L8. This application does not limit the number of lenses in each lens group.

[0154] In the first embodiment of this application, the object-side surface of the fourteenth lens L14 and the object-side surface and image-side surface of the sixteenth lens L16 of the sixth lens group G6 are all aspherical, and the number of inflection points of each aspherical surface is 3. The zoom lens 10 satisfies the following relationship: f_t / f_w = 8, |diy| = 8%, where f_t is the focal length of the zoom lens 10 at the telephoto end, f_w is the focal length of the zoom lens 10 at the wide-angle end, and |diy| is the maximum absolute value of the distortion value of the zoom lens 10 at different zoom positions. The zoom lens 10 provided in this application, when configured with six lens groups (i.e., fewer than seven lens groups), can achieve f_t / f_w = 8, |diy| = 8%. This means that the zoom lens 10 achieves a large zoom ratio and low distortion while using a small number of lens groups, which is beneficial for reducing the overall optical length and volume of the zoom lens 10.

[0155] The zoom lens 10 also satisfies the following relationship: TL_tele / f_tele = 1.07.

[0156] Where TL_tele is the total length of the zoom lens 10 at the telephoto end, and f_tele is the focal length of the zoom lens 10 at the telephoto end. Since TL_tele / f_tele = 1.07, it is beneficial for the miniaturization of the zoom lens 10.

[0157] At least one lens in the sixth lens group G6 has positive optical power. A lens with positive optical power can converge the light rays from the lens groups on the object side of the lens with positive optical power, which is beneficial to reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis and to the miniaturization of the zoom lens 10.

[0158] The Abbe number of the lens with positive optical power in the sixth lens group G6 also satisfies the following relationship: Nd_g6=1.545, Vd_g6=56.02,

[0159] Wherein, Nd_g6 is the refractive index number of the lens with positive optical power in the sixth lens group G6, and Vd_g6 is the Abbe number of the lens with positive optical power in the sixth lens group G6.

[0160] By limiting the refractive index Nd of the positive optical power lens in the sixth lens group G6 to 1.545 and the Abbe number Vd to 56.02, the positive optical power lens in the sixth lens group G6 has a relatively low refractive index and a relatively high Abbe number, resulting in higher light transmittance. This leads to a stronger light-gathering and adjustment direction in the positive optical power lens of the sixth lens group G6, resulting in higher optical quality and sharper images captured by the zoom lens 10.

[0161] In this embodiment, the lens closest to the object side of the sixth lens group G6 has positive optical power. A lens with positive optical power can converge light. Setting the lens closest to the object side of the sixth lens group G6 as a positive optical power lens is beneficial for converging light from the object side of the sixth lens group G6, which is beneficial for reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis and for miniaturizing the zoom lens 10.

[0162] In some embodiments of this application, the zoom lens 10 also satisfies the following relationships: f_g5 / f_w = -2.77, f_g6 / f_t = 1.53,

[0163] Where f_g5 is the focal length of the fifth lens group G5, and f_g6 is the focal length of the sixth lens group G6.

[0164] If the focal length of the lens group is too long, it will result in a large zoom movement of the lens group, which is not conducive to the miniaturization of the zoom lens 10. If the focal length of the lens group is too short, the lens needs to have a stronger ability to adjust light. If the adjustment is not accurate, it will affect the resolution of the entire zoom lens.

[0165] Since f_g5 / f_w = -2.77 and f_g6 / f_t = 1.53, limiting the focal length of the fifth lens group G5 and the focal length of the sixth lens group G6 to a suitable value is beneficial to reducing the length of the zoom lens 10 on the optical axis without causing a loss of resolution.

[0166] In this embodiment, the lens closest to the object plane in the sixth lens group G6 has a positive optical power, f_g6o = 37.4.

[0167] Where f_g6o is the optical power of the lens closest to the object surface.

[0168] As shown in Figures 3, 5, and 6, these figures are schematic diagrams of the lens module 300 provided in the first embodiment of this application when it is positioned at the wide-angle end, the intermediate focal length, and the telephoto end, respectively. Some design parameters of the lens module 300 in the first embodiment of this application are shown in Table 1a below.

[0169] Table 1a Partial design parameters of the lens module 300 according to the first embodiment of this application

[0170] In Table 1a, R represents the radius of curvature of the lens, D represents the lens thickness and the distance between the lenses, Nd represents the refractive index of the lens, Vd represents the Abbe number of the lens, and ER represents the optically effective radius of the lens. R1 represents the surface of the lens near the object side, and R2 represents the surface of the lens near the image side. ASP represents aspherical surface.

[0171] Understandably, in Table 1a, OBJ can represent the object-side surface of lens module 300; S1 can represent the object-side surface of the first lens L1; S2 can represent both the image-side surface of the first lens L1 and the object-side surface of the second lens L2; ​​S3 represents the image-side surface of the second lens L2; ​​S4 and S5 can represent the object-side and image-side surfaces of the third lens L3, respectively; S6 and S7 can represent the object-side and image-side surfaces of the fourth lens L4, respectively; S8 can represent the object-side surface of the fifth lens L5; S9 can represent both the image-side and image-side surfaces of the fifth lens L5 and the sixth lens L6; S10 can represent the image-side surface of the sixth lens L6; S11 and S12 can represent the object-side and image-side surfaces of the seventh lens L7, respectively; S13 represents the aperture stop S10; S14 and S15 can represent the object-side and image-side surfaces of the eighth lens L8, respectively; S16 can represent the object-side surface of the ninth lens L9; S17 can represent both the object-side and image-side surfaces of the third lens L3 and the image-side surface of the fourth lens L4, respectively; S8 can represent the object-side surface of the fifth lens L5; S9 can represent both the image-side and image-side surfaces of the fifth lens L5 and the sixth lens L6; S10 can represent the image-side surface of the sixth lens L6; S11 and S12 can represent the object-side and image-side surfaces of the seventh lens L7, respectively; S13 can represent the aperture stop S10; S14 and S15 can represent the object-side and image-side surfaces of the eighth lens L8, respectively; S16 can represent the object-side surface of the ninth lens L9; S17 can represent both the object-side and image-side surfaces of the third lens L3 and the image-side surface of the fourth lens L4, respectively; S12 can represent both the object-side and image-side surfaces of S18 can represent the image-side surface of the ninth lens L9 and the object-side surface of the tenth lens L10; S19 can represent the object-side surface of the eleventh lens L11; S20 can represent both the image-side surface of the eleventh lens L11 and the object-side surface of the twelfth lens L12; S21 represents the image-side surface of the twelfth lens L12; S22 and S23 can represent the object-side and image-side surfaces of the thirteenth lens L13, respectively; S24 and S25 can represent the object-side and image-side surfaces of the fourteenth lens L14, respectively; S26 and S27 can represent the object-side and image-side surfaces of the fifteenth lens L15, respectively; S28 and S29 can represent the object-side and image-side surfaces of the sixteenth lens L16, respectively; S30 and S31 can represent the object-side and image-side surfaces of the filter 30, respectively; S32 and S33 can represent the object-side and image-side surfaces of the cover plate 40, respectively; S34 can represent the imaging surface.

[0172] Additionally, the thickness of OBJ refers to the distance between the subject being photographed and the object-side surface of the lens module 300. The thickness of S1 refers to the distance between the object-side surface of the first lens L1 and the image-side surface of the first lens L1. The thickness of S2 refers to the distance between the image-side surface of the first lens L1 and the object-side surface of the second lens L2, and the image-side surface of the second lens L2. The thickness of S3 refers to the distance between the image-side surface of the second lens L2 and the object-side surface of the third lens L3. The thickness of S4 refers to the distance between the object-side surface of the third lens L3 and the image-side surface of the third lens L3. The thickness of S5 refers to the distance between the image-side surface of the third lens L3 and the object-side surface of the fourth lens L4. The thickness of S6 refers to the distance between the object-side surface of the fourth lens L4 and the image-side surface of the fourth lens L4. The thickness of S7 refers to the distance between the image-side surface of the fourth lens L4 and the object-side surface of the fifth lens L5. The thickness of S8 refers to the distance between the object-side surface of the fifth lens L5 and the image-side surface of the fifth lens L5. The thickness of S9 refers to the distance between the image-side surface of the fifth lens L5 and the object-side surface of the sixth lens L6, and the image-side surface of the sixth lens L6. The thickness of S10 refers to the distance between the image-side surface of the sixth lens L6 and the object-side surface of the seventh lens L7. The thickness of S11 refers to the distance between the object-side surface of the seventh lens L7 and the image-side surface of the seventh lens L7. The thickness of S12 refers to the distance between the image-side surface of the seventh lens L7 and the object-side surface of the eighth lens L8. The thickness of S14 refers to the distance between the object-side surface of the eighth lens L8 and the image-side surface of the eighth lens L8. The thickness of S15 refers to the distance between the image-side surface of the eighth lens L8 and the object-side surface of the ninth lens L9. The thickness of S16 refers to the distance between the object-side surface of the ninth lens L9 and the image-side surface of the ninth lens L19 and the object-side surface of the tenth lens L10. The thickness of S17 refers to the distance between the object-side surface of the tenth lens L10 and the image-side surface of the tenth lens L10. The thickness of S18 refers to the distance between the image-side surface of the tenth lens L10 and the object-side surface of the eleventh lens L11. The thickness of S19 refers to the distance between the object-side surface of the eleventh lens L11 and the image-side surface of the eleventh lens L11 and the object-side surface of the twelfth lens L12. The thickness of S20 refers to the distance between the object-side surface of the twelfth lens L12 and its image-side surface. The thickness of S21 refers to the distance between the image-side surface of the twelfth lens L12 and its object-side surface of the thirteenth lens L13. The thickness of S22 refers to the distance between the object-side surface of the thirteenth lens L13 and its image-side surface. The thickness of S23 refers to the distance between the image-side surface of the thirteenth lens L13 and its object-side surface of the fourteenth lens L14. The thickness of S24 refers to the distance between the object-side surface of the fourteenth lens L14 and its image-side surface. The thickness of S25 refers to the distance between the image-side surface of the fourteenth lens L14 and its object-side surface of the fifteenth lens L15.The thickness of S26 refers to the distance between the object-side surface and the image-side surface of the fifteenth lens L15. The thickness of S27 refers to the distance between the image-side surface of the fifteenth lens L15 and the object-side surface of the sixteenth lens L16. The thickness of S28 refers to the distance between the object-side surface and the image-side surface of the sixteenth lens L16. The thickness of S29 refers to the distance between the image-side surface of the sixteenth lens L16 and the object-side surface of the infrared filter. The thickness of S30 refers to the distance between the object-side surface and the image-side surface of filter 30. The thickness of S32 refers to the distance between the object-side surface and the image-side surface of the cover plate.

[0173] In addition, the aspherical coefficients of each lens of the lens module 300 in the first embodiment of this application are shown in Tables 1b and 1c below.

[0174] Table 1b shows the partial aspherical coefficients of each lens in the lens module 300 of the first embodiment.

[0175] Table 1c shows the partial aspherical coefficients of each lens in the lens module 300 of the first embodiment.

[0176] In this table, A4, A6, A8, A10, A12, A14, A16, A18, A20, and A22 represent aspheric coefficients. Polynomial coefficients not present in the table (such as A1, A2, A3, etc.) are all 0. It is understood that the parameters in the table are expressed in scientific notation.

[0177] It is understood that, among the aspherical surfaces of the lens module 300 shown in Tables 1a, 1b, and 1c, all even- and odd-order aspherical surface shapes z can be limited using, but are not limited to, the following aspherical formulas:

[0178] Where z is the sag of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and A i denoted as the i-th order aspherical coefficient. Substituting the design parameters of the first lens L1 to the sixteenth lens L16 of the lens module 300 into the above aspherical formula, the object-side and image-side surface shapes of the first lens L1 to the sixteenth lens L16 of the lens module 300 in the first embodiment of this application can be obtained.

[0179] Based on the data in Tables 1a, 1b, and 1c, some parameters of the lens module 300 in the first embodiment of this application at the wide-angle end (WIDE), intermediate focal length (MID), and telephoto end (TELE) can be obtained, as shown in Table 1d below.

[0180] Table 1d shows partial parameters of the lens module 300 in the first embodiment of this application at the wide-angle end, intermediate focal length, and telephoto end.

[0181] In Table 1d, EFL(f) represents the effective focal length, FNO represents the aperture value, 2ω represents the field of view, Dx represents the spacing between lens groups at different zoom positions, different values ​​represent different positional relationships of the lens groups, and different positional relationships can achieve different zooms, f_g1 represents the focal length of the first lens group G1, f_g2 represents the focal length of the second lens group G2, f_g3 represents the focal length of the third lens group G3, f_g4 represents the focal length of the fourth lens group G4, f_g5 represents the focal length of the fifth lens group G5, f_g6 represents the focal length of the sixth lens group G6, f_L15 represents the focal length of the fifteenth lens L15, and f_L16 represents the focal length of the sixteenth lens L16.

[0182] Figure 7A is a simulation diagram of spherical aberration when the lens module 300 of the first embodiment is focused at infinity at the wide-angle end; Figure 7B is a simulation diagram of astigmatism when the lens module 300 of the first embodiment is focused at infinity at the wide-angle end; and Figure 7C is a simulation diagram of distortion and phase aberration when the lens module 300 of the first embodiment is focused at infinity at the wide-angle end.

[0183] It is understood that the curves in Figure 7A represent the spherical aberration curves of the lens module 300. The spherical aberration curves represent the deviation of the focal point of light of different wavelengths after passing through the lenses of the optical system. The reference wavelengths for the spherical aberration curves are 650 nm, 555 nm, and 470 nm. Physically, it represents the deviation of light of a corresponding wavelength emitted in a 0-degree field of view from the ideal image point after passing through the zoom lens 10. The horizontal axis represents the deviation along the optical axis, and the vertical axis represents the normalized coordinates at the pupil. It is understood that in this application, when the spherical aberration curves of the lens module 300 reappear in subsequent coordinate systems, the horizontal and vertical axes representing the same meaning, as well as the annotations in the figures, will not be repeated.

[0184] It is understood that the curves in Figure 7B can represent the astigmatism field curvature of the lens module 300. The astigmatism field curvature can represent the meridional image plane curvature and the sagittal image plane curvature, used to illustrate the deviation of the convergence point of the fine beam from the ideal imaging plane in different fields of view. The solid line represents the meridional beam, and the dashed line represents the sagittal beam. The horizontal axis represents the deviation along the optical axis O, and the vertical axis represents the corresponding field of view. It is understood that in this application, when the astigmatism field curvature of the lens module 300 reappears in the coordinate system subsequently used to represent the astigmatism field curvature, the horizontal and vertical axes representing the same meaning, as well as the annotations in the figure, will not be repeated.

[0185] It is understood that the curve in Figure 7C can represent the distortion curve of the lens module 300. The distortion curve can represent the relative deviation between the beam convergence point (actual image height) and the ideal image height in different fields of view. The horizontal axis represents the optical distortion ratio, and the vertical axis represents the image height IH (mm). It is understood that in this application, when the horizontal and vertical axes and the annotations in the figure reappear in the coordinate system representing the distortion curve of the lens, the same meaning will not be repeated.

[0186] As shown in Figure 7A, when the lens module 300 is at the wide-angle end, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0187] As shown in Figure 7B, when the lens module 300 is at the wide-angle end, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the image quality of the lens module 300 is high.

[0188] As shown in Figure 7C, when the lens module 300 is at the wide-angle end, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 10%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0189] Figure 8A is a simulation diagram of spherical aberration when the lens module 300 of the first embodiment is focused at infinity in the intermediate focal length. Figure 8B is a simulation diagram of astigmatism when the lens module 300 of the first embodiment is focused at infinity in the intermediate focal length. Figure 8C is a simulation diagram of distortion and phase aberration when the lens module 300 of the first embodiment is focused at infinity in the intermediate focal length.

[0190] As shown in Figure 8A, when the lens module 300 is in the middle focal length, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0191] As shown in Figure 8B, when the lens module 300 is in the middle focal length, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the image quality of the lens module 300 is high.

[0192] As shown in Figure 8C, when the lens module 300 is in the middle focal length, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 5%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0193] Figure 9A is a simulation diagram of spherical aberration when the lens module 300 of the first embodiment is focused at infinity at the telephoto end; Figure 9B is a simulation diagram of astigmatism when the lens module 300 of the first embodiment is focused at infinity at the telephoto end; and Figure 9C is a simulation diagram of distortion and phase aberration when the lens module 300 of the first embodiment is focused at infinity at the telephoto end.

[0194] As shown in Figure 9A, when the lens module 300 is at the telephoto end, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction along the axis of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0195] As shown in Figure 9B, when the lens module 300 is at the telephoto end, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the image quality of the lens module 300 is high.

[0196] As shown in Figure 9C, when the lens module 300 is at the telephoto end, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 10%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0197] In the second embodiment of this application, please refer to Figure 10. The lens module 300 provided in the second embodiment of this application has a structure that is generally the same as that provided in the first embodiment. The difference is at least that the sixth lens group G6 also includes a seventeenth lens L17. The image side of the fourteenth lens L14, the object side of the fifteenth lens L15, the image side of the sixteenth lens L16, and the object side and image side of the seventeenth lens L17 are all aspherical surfaces, and the number of inflection points of each aspherical surface is 3.

[0198] The zoom lens 10 satisfies the following relationship: f_t / f_w = 9.78, |diy| = 8%, where f_t is the focal length of the zoom lens 10 at the telephoto end, f_w is the focal length of the zoom lens 10 at the wide-angle end, and |diy| is the maximum absolute value of the distortion value of the zoom lens 10 at different zoom positions. The zoom lens 10 provided in this application, with a configuration of six lens groups (i.e., fewer than seven lens groups), can achieve f_t / f_w = 9.78, |diy| = 8%. This means that the zoom lens 10 achieves a large zoom ratio and low distortion while using a smaller number of lens groups, which helps to reduce the overall optical length and volume of the zoom lens 10.

[0199] The zoom lens 10 also satisfies the following relationship: TL_tele / f_tele = 1.35.

[0200] Where TL_tele is the total length of the zoom lens 10 at the telephoto end, and f_tele is the focal length of the zoom lens 10 at the telephoto end. Since TL_tele / f_tele = 1.35, it is beneficial for the miniaturization of the zoom lens 10.

[0201] At least one lens in the sixth lens group G6 has positive optical power. A lens with positive optical power can converge the light rays from the lens groups on the object side of the lens with positive optical power, which is beneficial to reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis and to the miniaturization of the zoom lens 10.

[0202] The Abbe number of the lens with positive optical power in the sixth lens group G6 also satisfies the following relationship:

[0203] Nd_g6 = 1.5445 or Nd_g6 = 1.567,

[0204] Vd_g6 = 56.0199 or Vd_g6 = 37.55,

[0205] Wherein, Nd_g6 is the refractive index number of the lens with positive optical power in the sixth lens group G6, and Vd_g6 is the Abbe number of the lens with positive optical power in the sixth lens group G6.

[0206] By limiting the refractive index Nd of the positive power lens in the sixth lens group G6 to 1.5445 or 1.567 and the Abbe number Vd to 56.0199 or 37.55, the positive power lens in the sixth lens group G6 has a lower refractive index and a higher Abbe number, resulting in higher light transmittance. This leads to stronger light convergence and adjustment in the positive power lens of the sixth lens group G6, resulting in higher optical quality and sharper images captured by the zoom lens 10.

[0207] In this embodiment, the lens closest to the object side of the sixth lens group G6 has positive optical power. A lens with positive optical power can converge light. Setting the lens closest to the object side of the sixth lens group G6 as a positive optical power lens is beneficial for converging light from the object side of the sixth lens group G6, which is beneficial for reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis and for miniaturizing the zoom lens 10.

[0208] In some embodiments of this application, the zoom lens 10 also satisfies the following relationship: f_g5 / f_w=-2.97,

[0209] f_g6 / f_t = 0.80, where f_g5 is the focal length of the fifth lens group G5 and f_g6 is the focal length of the sixth lens group G6.

[0210] If the focal length of the lens group is too long, it will result in a large zoom movement of the lens group, which is not conducive to the miniaturization of zoom lenses. If the focal length of the lens group is too short, the lens element needs to have a stronger ability to adjust light. If the adjustment is not accurate, it will affect the overall resolution of the zoom lens.

[0211] Since f_g5 / f_w = -2.97 and f_g6 / f_t = 0.80, the focal lengths of the fifth lens group G5 and the sixth lens group G6 are limited to appropriate values, which is beneficial to reducing the length of the zoom lens 10 on the optical axis without causing a loss of resolution.

[0212] In this embodiment, the lens closest to the object plane in the sixth lens group G6 has positive optical power.

[0213] f_g6o = 83.6, where f_g6o is the optical power of the lens closest to the object surface.

[0214] As shown in Figures 10, 11, and 12, these figures are schematic diagrams of the lens module 300 provided in the second embodiment of this application when it is positioned at the wide-angle end, the intermediate focal length, and the telephoto end, respectively. Some design parameters of the lens module 300 in the second embodiment of this application are shown in Table 2a below.

[0215] Table 2a Partial design parameters of the lens module 300 according to the first embodiment of this application

[0216] Understandably, in Table 2a, OBJ can represent the object-side surface of lens module 300; S1 can represent the object-side surface of the first lens L1; S2 can represent both the image-side surface of the first lens L1 and the object-side surface of the second lens L2; ​​S3 represents the image-side surface of the second lens L2; ​​S4 and S5 can represent the object-side and image-side surfaces of the third lens L3, respectively; S6 and S7 can represent the object-side and image-side surfaces of the fourth lens L4, respectively; S8 can represent the object-side surface of the fifth lens L5; S9 can represent both the image-side and image-side surfaces of the fifth lens L5 and the sixth lens L6; S10 can represent the image-side surface of the sixth lens L6; S11 and S12 can represent the object-side and image-side surfaces of the seventh lens L7, respectively; S13 represents the aperture stop S10; S14 and S15 can represent the object-side and image-side surfaces of the eighth lens L8, respectively; S16 can represent the object-side surface of the ninth lens L9; S17 can represent both the image-side and image-side surfaces of the ninth lens L9 and... S10 can represent the object-side surface of the tenth lens L10; S18 represents the image-side surface of the tenth lens L10; S19 can represent the object-side surface of the eleventh lens L11; S20 can represent both the image-side surface of the eleventh lens L11 and the object-side surface of the twelfth lens L12; S21 represents the image-side surface of the twelfth lens L12; S22 and S23 can represent the object-side surface and image-side surface of the thirteenth lens L13, respectively; S24 and S25 can represent the fourteenth lens L14, respectively. The object-side surface and the image-side surface; S26 and S27 can represent the object-side surface and the image-side surface of the fifteenth lens L15, respectively; S28 and S29 can represent the object-side surface and the image-side surface of the sixteenth lens L16, respectively; S30 and S31 can represent the object-side surface and the image-side surface of the seventeenth lens L17, respectively; S32 and S33 can represent the object-side surface and the image-side surface of the filter 30, respectively; S34 and S35 can represent the object-side surface and the image-side surface of the cover plate 40, respectively; S36 can represent the imaging surface.

[0217] Furthermore, the aspherical coefficients of each lens in the lens module 300 of the second embodiment of this application are shown in Tables 2b and 2c below.

[0218] Table 2b shows the partial aspherical coefficients of each lens in the lens module 300 according to the second embodiment.

[0219] Based on the data in Tables 2a and 2b, some parameters of the lens module 300 in the second embodiment of this application at the wide-angle end (WIDE), intermediate focal length (MID), and telephoto end (TELE) can be obtained, as shown in Table 2c below.

[0220] Table 2c: Partial parameters of the lens module 300 in the second embodiment of this application at the wide-angle end, intermediate focal length, and telephoto end.

[0221] Figure 13A is a simulation diagram of spherical aberration when the lens module 300 of the second embodiment is focused at infinity at the wide-angle end. Figure 13B is a simulation diagram of astigmatism when the lens module 300 of the second embodiment is focused at infinity at the wide-angle end. Figure 13C is a simulation diagram of distortion and phase aberration when the lens module 300 of the second embodiment is focused at infinity at the wide-angle end.

[0222] As shown in Figure 13A, when the lens module 300 is at the wide-angle end, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0223] As shown in Figure 13B, when the lens module 300 is at the wide-angle end, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the image quality of the lens module 300 is high.

[0224] As shown in Figure 13C, when the lens module 300 is at the telephoto end, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 10%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0225] Figure 14A is a simulation diagram of spherical aberration when the lens module 300 of the second embodiment is focused at infinity in the intermediate focal length. Figure 14B is a simulation diagram of astigmatism when the lens module 300 of the second embodiment is focused at infinity in the intermediate focal length. Figure 14C is a simulation diagram of distortion and phase aberration when the lens module 300 of the second embodiment is focused at infinity in the intermediate focal length.

[0226] As shown in Figure 14A, when the lens module 300 is in the middle focal length, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0227] As shown in Figure 14B, when the lens module 300 is in the middle focal length, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the image quality of the lens module 300 is high.

[0228] As shown in Figure 14C, when the lens module 300 is in the middle focal length, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 5%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0229] Figure 15A is a simulation diagram of spherical aberration when the lens module 300 of the second embodiment is focused at infinity at the telephoto end. Figure 15B is a simulation diagram of astigmatism when the lens module 300 of the second embodiment is focused at infinity at the telephoto end. Figure 15C is a simulation diagram of distortion and phase aberration when the lens module 300 of the second embodiment is focused at infinity at the telephoto end.

[0230] As shown in Figure 15A, when the lens module 300 is at the telephoto end, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0231] As shown in Figure 15B, when the lens module 300 is at the telephoto end, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the imaging quality of the lens module 300 is high.

[0232] As shown in Figure 15C, when the lens module 300 is at the telephoto end, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 10%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0233] In the third embodiment of this application, please refer to Figure 16. The lens module 300 provided in the third embodiment of this application has a structure that is generally the same as that provided in the first embodiment. The difference is at least that the lens module 300 provided in the third embodiment omits the sixteenth lens L16, the fourth lens group G4 includes the eleventh lens L11, the fifth lens group G5 includes the twelfth lens L12, and the sixth lens group includes the thirteenth lens L13, the fourteenth lens L14, and the fifteenth lens L15. The image side of the thirteenth lens L13, the object side and the image side of the fifteenth lens L15 are all aspherical, and the number of inflection points of each aspherical surface is 3.

[0234] The zoom lens 10 satisfies the following relationship: f_t / f_w = 8, |diy| = 8%, where f_t is the focal length of the zoom lens 10 at the telephoto end, f_w is the focal length of the zoom lens 10 at the wide-angle end, and diy is the minimum distortion value of the zoom lens 10 at different zoom positions. The zoom lens 10 provided in this application, with six lens groups (i.e., fewer than seven lens groups), can achieve f_t / f_w = 8, |diy| = 8%. This means that the zoom lens 10 achieves a large zoom ratio and low distortion while using a smaller number of lens groups, which helps to reduce the overall optical length and volume of the zoom lens 10.

[0235] The zoom lens 10 also satisfies the following relationship: TL_tele / f_tele = 1.35.

[0236] Where TL_tele is the total length of the zoom lens 10 at the telephoto end, and f_tele is the focal length of the zoom lens 10 at the telephoto end. Since TL_tele / f_tele = 1.35, it is beneficial for the miniaturization of the zoom lens 10.

[0237] At least one lens in the sixth lens group G6 has positive optical power. A lens with positive optical power can converge the light rays from the lens groups on the object side of the lens with positive optical power, which is beneficial to reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis and to the miniaturization of the zoom lens 10.

[0238] The Abbe number of the lens with positive optical power in the sixth lens group G6 also satisfies the following relationship: Nd_g6=1.567, Vd_g6=37.55,

[0239] Wherein, Nd_g6 is the refractive index number of the lens with positive optical power in the sixth lens group G6, and Vd_g6 is the Abbe number of the lens with positive optical power in the sixth lens group G6.

[0240] By limiting the refractive index Nd of the positive optical power lens in the sixth lens group G6 to 1.567 and the Abbe number Vd to 37.55, the positive optical power lens in the sixth lens group G6 has a lower refractive index and a higher Abbe number, resulting in higher light transmittance. This leads to stronger light convergence and adjustment direction of the positive optical power lens in the sixth lens group G6, resulting in higher optical quality and sharper images captured by the zoom lens 10.

[0241] In this embodiment, the lens closest to the object side of the sixth lens group G6 has positive optical power. A lens with positive optical power can converge light. Setting the lens closest to the object side of the sixth lens group G6 as a positive optical power lens is beneficial for converging light from the object side of the sixth lens group G6, which is beneficial for reducing the size of the zoom lens 10 in the direction perpendicular to the optical axis and for miniaturizing the zoom lens 10.

[0242] In some embodiments of this application, the zoom lens 10 also satisfies the following relationship: f_g5 / f_w = -4.86,

[0243] f_g6 / f_t = 1.45, where f_g5 is the focal length of the fifth lens group G5 and f_g6 is the focal length of the sixth lens group G6.

[0244] If the focal length of the lens group is too long, it will result in a large zoom movement of the lens group, which is not conducive to the miniaturization of zoom lenses. If the focal length of the lens group is too short, the lens element needs to have a stronger ability to adjust light. If the adjustment is not accurate, it will affect the overall resolution of the zoom lens.

[0245] Since f_g5 / f_w = -4.86 and f_g6 / f_t = 1.45, limiting the focal length of the fifth lens group G5 and the focal length of the sixth lens group G6 to a suitable value not only helps to reduce the length of the zoom lens 10 on the optical axis, but also does not cause a loss of resolution.

[0246] In this embodiment, the lens closest to the object plane in the sixth lens group G6 has positive optical power.

[0247] f_g6o = 67.6, where f_g6o is the optical power of the lens closest to the object surface.

[0248] As shown in Figures 16, 17, and 18, these figures are schematic diagrams of the lens module 300 provided in the third embodiment of this application when it is at the wide-angle end, intermediate focal length, and telephoto end, respectively. Some design parameters of the lens module 300 in the third embodiment of this application are shown in Table 3a below.

[0249] Table 3a Partial design parameters of the lens module 300 according to the first embodiment of this application

[0250] Understandably, in Table 3a, OBJ can represent the object-side surface of lens module 300; S1 can represent the object-side surface of the first lens L1; S2 can represent both the image-side surface of the first lens L1 and the object-side surface of the second lens L2; ​​S3 represents the image-side surface of the second lens L2; ​​S4 and S5 can represent the object-side and image-side surfaces of the third lens L3, respectively; S6 and S7 can represent the object-side and image-side surfaces of the fourth lens L4, respectively; S8 can represent the object-side surface of the fifth lens L5; S9 can represent both the image-side and image-side surfaces of the fifth lens L5 and the sixth lens L6; S10 can represent the image-side surface of the sixth lens L6; S11 and S12 can represent the object-side and image-side surfaces of the seventh lens L7, respectively; S13 represents the aperture stop STO; S14 and S15 can represent the object-side and image-side surfaces of the eighth lens L8, respectively; S16 S17 can represent the object-side surface of the ninth lens L9; S18 can represent the image-side surface of the ninth lens L9 and the object-side surface of the tenth lens L10; S19 can represent the object-side surface of the eleventh lens L11; S20 can represent the image-side surface of the eleventh lens L11; S21 and S22 can represent the object-side and image-side surfaces of the twelfth lens L12, respectively; S23 and S24 can represent the object-side and image-side surfaces of the thirteenth lens L13, respectively; S24 and S25 can represent the object-side and image-side surfaces of the fourteenth lens L14, respectively; S25 and S26 can represent the object-side and image-side surfaces of the fifteenth lens L15, respectively; S29 and S30 can represent the object-side and image-side surfaces of the filter 30, respectively; S31 and S32 can represent the object-side and image-side surfaces of the cover plate 40, respectively; S33 can represent the imaging surface.

[0251] Furthermore, the aspherical coefficients of each lens in the lens module 300 of the third embodiment of this application are shown in Tables 3b and 3c below.

[0252] Table 3b shows the partial aspherical coefficients of each lens in the lens module 300 according to the third embodiment.

[0253] Based on the data in Tables 3a and 3b, some parameters of the lens module 300 in the third embodiment of this application at the wide-angle end (WIDE), intermediate focal length (MID), and telephoto end (TELE) can be obtained, as shown in Table 3c below.

[0254] Table 3c shows partial parameters of the lens module 300 in the third embodiment of this application at the wide-angle end, intermediate focal length, and telephoto end.

[0255] Figure 19A is a simulation diagram of spherical aberration when the lens module 300 of the third embodiment is focused at infinity at the wide-angle end. Figure 19B is a simulation diagram of astigmatism when the lens module 300 of the third embodiment is focused at infinity at the wide-angle end. Figure 19C is a simulation diagram of distortion and phase aberration when the lens module 300 of the third embodiment is focused at infinity at the wide-angle end.

[0256] As shown in Figure 19A, when the lens module 300 is at the wide-angle end, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0257] As shown in Figure 19B, when the lens module 300 is at the wide-angle end, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the image quality of the lens module 300 is high.

[0258] As shown in Figure 19C, when the lens module 300 is at the telephoto end, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 10%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0259] Figure 20A is a simulation diagram of spherical aberration when the lens module 300 of the third embodiment is focused at infinity in the intermediate focal length. Figure 20B is a simulation diagram of astigmatism when the lens module 300 of the third embodiment is focused at infinity in the intermediate focal length. Figure 20C is a simulation diagram of distortion and phase aberration when the lens module 300 of the third embodiment is focused at infinity in the intermediate focal length.

[0260] As shown in Figure 20A, when the lens module 300 is in the middle focal length, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0261] As shown in Figure 20B, when the lens module 300 is in the middle focal length, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the image quality of the lens module 300 is high.

[0262] As shown in Figure 20C, when the lens module 300 is in the middle focal length, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 5%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0263] Figure 21A is a simulation diagram of spherical aberration when the lens module 300 of the third embodiment is focused at infinity at the telephoto end. Figure 21B is a simulation diagram of astigmatism when the lens module 300 of the third embodiment is focused at infinity at the telephoto end. Figure 21C is a simulation diagram of distortion and phase aberration when the lens module 300 of the third embodiment is focused at infinity at the telephoto end.

[0264] As shown in Figure 21A, when the lens module 300 is at the telephoto end, the normalized coordinates of the lens module 300 are all small, the spherical aberration correction along the axis of the lens module 300 is better, and the imaging quality of the lens module 300 is higher.

[0265] As shown in Figure 21B, when the lens module 300 is at the telephoto end, the field curvature in both directions is small, the lens module 300 has a good depth of focus, and the imaging quality of the lens module 300 is high.

[0266] As shown in Figure 21C, when the lens module 300 is at the telephoto end, the absolute value of the optical distortion ratio of the lens module 300 at different image heights is less than 10%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the lens module 300 is high.

[0267] In summary, please refer to Table 4 for some parameter values ​​of the lens module in the first to third embodiments provided in this application.

[0268] Table 4 is a summary table of some parameter values ​​of the lens module in the first to third embodiments provided in this application.

[0269] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0270] Furthermore, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0271] In this application, expressions including ordinal numbers such as "first" and "second" may modify the elements. However, such elements are not limited by the foregoing expressions. For example, the foregoing expressions do not limit the order and / or importance of the elements. The foregoing expressions are only used to distinguish one element from other elements. For example, "first user equipment" and "second user equipment" refer to different user equipment, although both "first user equipment" and "second user equipment" are user equipment. Similarly, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0272] When a component is referred to as "connected" or "accessed" to other components, it should be understood that this component not only connects directly to or accesses other components, but also that another component may exist between this component and other components. On the other hand, when a component is referred to as "directly connected" or "directly accessed" to other components, it should be understood that no component exists between them.

[0273] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A zoom lens, characterized in that, From the object side to the image side, the zoom lens includes a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group, and a sixth lens group. At least one of the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, and the sixth lens group is movable along the optical axis direction to achieve zooming. The first lens group has a positive optical power, the second lens group has a negative optical power, the third lens group has a positive optical power, the fourth lens group has a positive optical power, the fifth lens group has a negative optical power, and the sixth lens group has a positive optical power. The sixth lens group includes at least two lenses, and the at least two lenses include at least one aspherical lens. The aspherical lens of the sixth lens group has at least one aspherical surface in the optical axis direction, and the aspherical surface has at least two inflection points. The zoom lens satisfies the following relationship: f_t / f_w≥8, |diy|<10%, where f_t is the focal length of the zoom lens at the telephoto end, f_w is the focal length of the zoom lens at the wide-angle end, and |diy| is the maximum value of the absolute value of the distortion value of the zoom lens at different zoom positions.

2. The zoom lens according to claim 1, characterized in that, The number of inflection points of the aspherical surface is greater than 2.

3. The zoom lens according to claim 1 or 2, characterized in that, The zoom lens also satisfies the following relationship: TL_tele / f_tele<1.4, where TL_tele is the total length of the zoom lens at the telephoto end, and f_tele is the focal length of the zoom lens at the telephoto end.

4. The zoom lens according to any one of claims 1-3, characterized in that, At least one lens in the sixth lens group has a positive optical power.

5. The zoom lens according to claim 4, characterized in that, The Abbe number of the lens with positive optical power in the sixth lens group satisfies the following relationship: Vd_g6>30, 1.40<Nd_g6<2.1, where Vd_g6 is the Abbe number of the lens with positive optical power in the sixth lens group, and Nd_g6 is the refractive index number of the lens with positive optical power in the sixth lens group.

6. The zoom lens according to any one of claims 1-5, characterized in that, The lens closest to the object side in the sixth lens group has a positive optical power.

7. The zoom lens according to any one of claims 1-6, characterized in that, At different focal lengths, the fifth lens group is used to move in the optical axis direction for focusing.

8. The zoom lens according to any one of claims 1-7, characterized in that, The zoom lens satisfies the following relationship: -6<f_g5 / f_w<-2, 0.5<f_g6 / f_t<1.8, where f_g5 is the focal length of the fifth lens group, and f_g6 is the focal length of the sixth lens group.

9. The zoom lens according to any one of claims 1-8, characterized in that, The zoom lens further includes an aperture stop, and the aperture stop is located between any two lenses of the zoom lens.

10. The zoom lens according to claim 9, characterized in that, In the optical axis direction, the aperture stop is located between the second lens group and the third lens group.

11. The zoom lens according to claim 9 or 10, characterized in that, The aperture of the aperture stop can change.

12. A lens module, characterized in that, The zoom lens includes an image sensor and the zoom lens according to any one of claims 1-11, and the zoom lens is used to image light onto the image sensor.

13. The lens module according to claim 12, characterized in that, The lens module further includes a filter, and the filter is located between the image sensor and the sixth lens group in the optical axis direction.

14. An electronic device, characterized in that, The electronic device includes a housing and the zoom lens according to claim 12 or 13, and the zoom lens is installed in the housing.

Images