Zoom lens, lens module and electronic equipment

Abstract

The invention discloses a zoom lens, a lens module and electronic equipment. The zoom lens comprises a first lens group with positive focal power and a second lens group with negative focal power which are sequentially arranged from an object side to an image side, when the zoom lens carries out zooming from a short-focus end state to a long-focus end state, the first lens group and the second lens group move towards the object side along the optical axis, and the distance between the first lens group and the second lens group is gradually reduced. The first lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with focal power and a fourth lens with positive focal power which are sequentially arranged from the object side to the image side; according to the zoom lens provided by the invention, continuous zooming is realized through a single lens, so that the imaging definition of the zoom lens can be always kept at a relatively good level; and the layout of the single lens is also convenient for the structural optimization of the electronic equipment, and the design requirement of miniaturization can be well met.

Description

[0001] This application is a divisional application of Chinese patent application filed on October 29, 2021, with application number 202111275212.7 and title "Zoom Lens, Lens Module and Electronic Device". Technical Field

[0002] This application relates to the field of zoom lenses, and more specifically, to a zoom lens, a lens module, and an electronic device. Background Technology

[0003] In recent years, electronic devices equipped with camera lenses (such as digital cameras, smartphones, laptops, tablets, etc.) have been rapidly developing and becoming more widespread. At the same time, electronic devices have also placed new demands on the performance of camera lenses.

[0004] Currently, most high-magnification zoom lenses for electronic devices on the market are "leapfrog" zooms, which means they achieve hybrid optical zoom by using two or more lenses with different focal lengths and combining them with algorithm-based digital zoom.

[0005] However, "jump zoom" is based on multiple camera lenses with different focal lengths, relying on algorithmic processing to achieve continuous zoom, and is not true continuous zoom. During the zoom process, the image sharpness of the focal length transitions between the multiple camera lenses decreases compared to continuous optical zoom, thus affecting image quality. At the same time, the inclusion of multiple camera lenses not only complicates the manufacturing process, but also makes it less suitable for handheld mobile electronic devices with strong miniaturization requirements.

[0006] In summary, how to reduce the number of camera lenses while maintaining a large zoom ratio and good image quality has become one of the problems that the industry is currently trying to solve. Summary of the Invention

[0007] This application provides a zoom lens that achieves a large zoom ratio and good image quality with a single lens. Additionally, this application provides a lens module using this zoom lens, and an electronic device using this lens module.

[0008] Firstly, a zoom lens is provided, including: A first lens group with positive optical power and a second lens group with negative optical power are arranged sequentially from the object side to the image side; When the zoom lens zooms from the short focal length end to the long focal length end, the first lens group and the second lens group move along the optical axis to the object side, and the distance between the first lens group and the second lens group gradually decreases. The first lens group includes: a first lens with positive optical power, a second lens with negative optical power, a third lens with optical power, and a fourth lens with positive optical power, arranged sequentially from the object side to the image side. The optical powers of the first lens, second lens, third lens, and fourth lens are reasonably distributed so that the first lens group has positive optical power.

[0009] The zoom lens provided in this application primarily utilizes the refraction principle of lenses for imaging. Light rays are refracted after passing through the zoom lens, forming a clear image on the focal plane. The image of the scene is then recorded by an electronic image sensor located on the focal plane. The zoom lens includes a first lens group and a second lens group arranged sequentially from the object side to the image side. The first lens group is a focusing lens group with positive optical power, capable of converging light rays to compress the beam aperture entering the zoom lens. The first lens group can move along the optical axis of the zoom lens to change the focal length, enabling continuous zoom. The second lens group is a compensation lens group with negative optical power, also capable of moving along the optical axis of the zoom lens to balance and eliminate aberrations generated during the movement of the first lens group, ensuring that the focal point of the zoom lens falls on the focal plane of the electronic image sensor. This achieves a large zoom ratio while maintaining good image quality.

[0010] The zoom lens provided in this application achieves continuous zoom through a single lens. Compared with the "jump-type" zoom lenses in the prior art, there is no focal length transition part of multiple lenses, which eliminates the image quality problem of focal length transition part. Therefore, the image clarity of the zoom lens can always be kept at a better level. At the same time, the layout of a single lens is also conducive to the structural optimization of electronic devices and can better meet the design requirements of miniaturization.

[0011] Optionally, the first lens group and the second lens group are assembled through a lens barrel.

[0012] Optionally, the first lens group and the second lens group are driven by a motor. Specifically, the first lens group is mounted on the first motor, which drives the first lens group to move along the optical axis; the second lens group is mounted on the second motor, which drives the second lens group to move along the optical axis.

[0013] Optionally, the total number of lenses included in the first lens group and the second lens group is 7-12. For example, if the first lens group consists of 4 lenses and the second lens group consists of 3 lenses, the total number is 7; if the first lens group consists of 4 lenses and the second lens group consists of 7 lenses, the total number is 11.

[0014] Optionally, the zoom lens also includes an aperture stop, which can be located on the object side of the first lens in the first lens group, or on any lens in the first lens group.

[0015] Optionally, the zoom lens also includes an infrared cut-off filter, which is disposed on the image side of the fourth lens in the second lens group.

[0016] Optionally, the lenses in the first lens group and the second lens group can be made of plastic or glass.

[0017] Optionally, the lenses in the first lens group and the second lens group can also be other materials that can meet the refractive index requirements, such as composite materials in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into the resin matrix.

[0018] In one possible design, the zoom lens satisfies the following relationship: 0.5 <f G1 / fw<0.8.

[0019] Among them, f G1 f is the focal length of the first lens group, and fw is the focal length of the zoom lens in the short focal length state.

[0020] The aforementioned formula specifies the range of the ratio between the focal length of the first lens group and the focal length of the zoom lens at its short focal length. When this ratio is less than 0.8, it limits the axial spatial length of the first lens group, which helps to compress the overall optical length of the zoom lens and achieve miniaturization of the module structure. When this ratio is greater than 0.5, it allows the zoom lens to maintain good image quality. Therefore, by combining these constraints, while ensuring the image quality of the zoom lens, its size can be made smaller, thus better adapting it to miniaturized handheld mobile electronic devices.

[0021] In one possible design, the zoom lens satisfies the following relationship: TTLt / ft < 1.0; Where TTLt is the total optical length of the zoom lens in the telephoto end state, and ft is the focal length of the zoom lens in the telephoto end state.

[0022] The above formula specifies the range of the ratio between the focal length of the first lens group and the focal length of the zoom lens at the short focal length end. This allows the zoom lens to satisfy the telephoto characteristics while limiting the total optical length of the zoom lens, thereby achieving module miniaturization. It also facilitates proportional scaling when the zoom lens architecture is the same.

[0023] In one possible design, the object-side surface of the first lens is convex, and the image-side surface of the fourth lens is convex.

[0024] The above-mentioned limitations further specify the surface structure of the object-side surface of the first lens and the image-side surface of the fourth lens in the first lens group. Specifically, the object-side surface of the first lens in the first lens group is convex, which helps to reduce spherical aberration. The image-side surface of the fourth lens in the first lens group is also convex, which can effectively reduce spherical aberration and distortion, thereby improving the imaging quality of the zoom lens. At the same time, this design can also enhance the ability of the first lens group to converge light rays and extend the back focal length of the zoom lens. This allows the zoom lens to achieve good imaging results while minimizing its overall optical length, thereby achieving the goal of miniaturization.

[0025] In one possible design, the zoom lens satisfies the following relationship: FNOt<5; Wherein, FNOt is the aperture value of the zoom lens in the telephoto end state.

[0026] The above formula specifies the aperture range of the zoom lens at the telephoto end, which allows the zoom lens to display high resolution at the short focal length end, while also enabling the lens to have a large light transmission, improving imaging performance, and achieving clear imaging results even when shooting in darker environments.

[0027] In one possible design, the zoom lens satisfies the following relationship: ft / fw < 1.6.

[0028] The aforementioned formula specifies the range of the ratio between the focal length of the zoom lens at its telephoto end and the focal length at its short focal length, i.e., a zoom ratio of less than 1.6. While meeting this zoom ratio requirement, the optical structure of the zoom lens in this application is relatively simple. Continuous zooming can be easily achieved through two lens groups, which is beneficial for module miniaturization while maintaining good image quality.

[0029] In one possible design, the zoom lens satisfies the following relationship: TTLt / Imgh < 5.5; Where Imgh is half the diagonal length of the pixel region of the electronic photosensitive element on the focusing plane.

[0030] The above formula specifies the range of the ratio between the total optical length of the zoom lens at the telephoto end and half the diagonal length of the pixel area of ​​the electronic photosensitive element on the focusing plane. While ensuring that the zoom lens has high-pixel images, limiting the total optical length of the zoom lens is beneficial to reducing the overall size and achieving miniaturization, while also taking into account good image quality.

[0031] In one possible design, the zoom lens satisfies the following relationship: TT 1-n / TTLt<0.4; Among them, TT 1-n It is the sum of the thicknesses of all lenses in the first lens group and the second lens group along the optical axis.

[0032] The above formula specifies the range of ratios between the sum of the thicknesses of all lenses in the first and second lens groups along the optical axis and the total optical length of the zoom lens at the telephoto end. This limits the thickness of all lenses in the first and second lens groups, which is beneficial for the manufacturing of zoom lenses, as well as for achieving a large zoom ratio and good zoom performance. This ratio range can effectively balance zoom performance and manufacturing manufacturability.

[0033] In one possible design, the zoom lens satisfies the following relationship: 0.6 <f G1 / f1<1.2; Where f1 is the focal length of the first lens.

[0034] The above formula specifies the range of the ratio between the focal length of the first lens group and the focal length of the first lens in the first lens group. When this ratio range is met, it is beneficial to reasonably allocate the optical power of the lens, avoid local concentration of optical power in the lens group and cause tolerance sensitivity, thereby reducing the difficulty of processing and manufacturing and improving the yield rate.

[0035] In one possible design, the zoom lens satisfies the following relationship: 0.6 <f G1 / f4<1.2; Where f4 is the focal length of the fourth lens.

[0036] The above formula specifies the range of the ratio between the focal length of the first lens group and the focal length of the fourth lens in the first lens group. When this ratio range is met, it is beneficial to reasonably allocate the optical power of the lens, avoid local concentration of optical power in the lens group and cause tolerance sensitivity, thereby reducing the difficulty of processing and manufacturing and improving the yield rate.

[0037] In one possible design, the second lens group includes: a fifth lens with optical power, a sixth lens with optical power, a seventh lens with negative optical power, and an eighth lens with optical power, arranged sequentially from the object side to the image side. The reasonable distribution of optical power among the fifth, sixth, seventh, and eighth lenses enables the second lens group to have negative optical power.

[0038] Alternatively, the fifth, sixth, seventh, and eighth lenses may also be allocated optical power in other ways, which is not limited in this application.

[0039] Secondly, this application also provides a lens module, including a reflector, an electronic photosensitive element, and the aforementioned zoom lens. The reflector is located on the object side of the zoom lens and is used to deflect light onto the zoom lens. The electronic photosensitive element is located on the image side of the zoom lens, and the zoom lens is used to image light onto the electronic photosensitive element.

[0040] Alternatively, the reflector may be a prism or a mirror.

[0041] Optionally, the reflective surface of the mirror can be a metal reflective film layer prepared by vapor deposition or sputtering, and the metal can be nickel, aluminum, silver, gold, or their alloys.

[0042] Among them, the reflector can change the direction of light propagation, so that the optical axis of the zoom lens can be different from the direction of external light entering the electronic device. This makes the arrangement position and angle of the zoom lens more flexible. For example, the optical axis of the zoom lens can be parallel to the display screen of the electronic device, thereby reducing the size requirements of the accommodation space in the thickness direction of the electronic device.

[0043] In addition, since the lens module uses the aforementioned zoom lens, it also has the advantages of a large zoom ratio, excellent image quality, miniaturization, ease of processing and manufacturing, and high yield rate, which are corresponding to zoom lenses.

[0044] Thirdly, this application also provides an electronic device, including a processor and the aforementioned lens module, wherein the lens module is used to acquire image data and input the image data into the processor, and the processor is used to process the image data.

[0045] Optionally, the electronic device also includes a housing and a display screen, the display screen being mounted on the housing, and an accommodating space being formed inside the housing, in which a lens module can be mounted, the display screen being electrically connected to the processor, and the display screen being able to display images or videos processed by the processor.

[0046] Because of the miniaturization advantage of lens modules, their size requirements for housing space are reduced. As a result, electronic devices can be made thinner and lighter by reducing the thickness of the housing; or, without changing the thickness of the housing, the housing space saved by the lens module can be made up for other functional components.

[0047] Optionally, the housing may also include other components, such as a battery, flash, fingerprint recognition module, earpiece, circuit board, sensor, etc., but is not limited to these.

[0048] Optionally, the electronic device can be a terminal device with video or photo capture capabilities, such as a mobile phone, tablet computer, laptop computer, camcorder, video recorder, camera, intelligent robot, or other devices with photo or video capture capabilities. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of an example of a zoom lens provided in an embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment; Figure 3 yes Figure 1 A schematic diagram of the distortion curve of the zoom lens in the embodiment; Figure 4 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application; Figure 5 yes Figure 4 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment; Figure 6 yes Figure 4 A schematic diagram of the distortion curve of the zoom lens in the embodiment; Figure 7 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application; Figure 8 yes Figure 7 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment; Figure 9 yes Figure 7 A schematic diagram of the distortion curve of the zoom lens in the embodiment; Figure 10 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application; Figure 11 yes Figure 10 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment; Figure 12 yes Figure 10 A schematic diagram of the distortion curve of the zoom lens in the embodiment; Figure 13 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application; Figure 14 yes Figure 13 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment; Figure 15 yes Figure 13 A schematic diagram of the distortion curve of the zoom lens in the embodiment; Figure 16 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application; Figure 17yes Figure 16 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment; Figure 18 yes Figure 16 A schematic diagram of the distortion curve of the zoom lens in the embodiment; Figure 19 This is a schematic diagram of an example of a lens module provided in an embodiment of this application; Figure 20 This is a schematic diagram of yet another example of the lens module provided in the embodiments of this application; Figure 21 This is a schematic diagram of the electronic device provided in the embodiments of this application.

[0050] Reference numerals: 10, First lens group; 11, First lens; 12, Second lens; 13, Third lens; 14, Fourth lens; 20, Second lens group; 25, Fifth lens; 26, Sixth lens; 27, Seventh lens; 28, Eighth lens; 30, Aperture stop; 40, Infrared cut-off filter; 50, Electronic photosensitive element; 60, Reflector; 100, Lens module; 200, Housing; 300, Display screen. Detailed Implementation

[0051] The following provides illustrative examples of relevant content that may be involved in the embodiments of this application.

[0052] For ease of understanding, the technical terms used in this application will be explained and described below.

[0053] 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 lens group to the focal plane when a distant object is focused into a sharp image. From a practical perspective, it can be understood as the distance from the center of the lens to the film plane. For prime lenses, the position of their optical center remains constant; for zoom lenses, changes in the lens's optical center result in changes in the focal length.

[0054] Aperture is a device used to control the amount of light passing through the lens and entering the camera's sensor. It is usually located inside the lens. Aperture size is expressed as F / number.

[0055] Aperture value is a relative value derived from the lens's focal length and the lens's light-gathering diameter (the reciprocal of the relative aperture). A smaller aperture value allows more light to enter the lens in the same unit of time. A larger aperture value results in a shallower depth of field, blurring the background and creating an effect similar to a telephoto lens.

[0056] Focal power is equal to the difference between the image-side and object-side convergence of a light beam. It characterizes the ability of an optical system to deflect light rays. Focal power is commonly represented by the letter φ. The focal power of a refracting spherical surface is φ = (n' - n) / r = n' / f' = -n / f, where n' is the image-side refractive index, n is the object-side refractive index, r is the radius of the spherical surface, f' is the image focal length, and f is the object focal length. Generally, focal power is expressed as the reciprocal of the image-side focal length (approximately assuming the refractive index of air is 1). The above equation for focal power is universally applicable to any optical system (regardless of paraxiality).

[0057] Optical power characterizes the refractive ability of an optical system to refract an incident parallel beam of light. The larger the value of φ, the more pronounced the refraction of the parallel beam; when φ>0, the refraction is converging; when φ<0, the refraction is diverging. When φ=0, corresponding to φ, it is plane refraction. In this case, the axial parallel beam remains axially parallel after refraction, and no refraction occurs.

[0058] Total track length (TTL) refers to the total length from the lens head to the imaging plane, and is the main factor that determines the height of the camera.

[0059] The Abbe number, also known as the dispersion coefficient, is the ratio of the difference in refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0060] The field of view (FOV) in optical instruments is the angle between the two edges of the lens, representing the maximum range through which the image of the target object can pass through the lens. The size of the FOV determines the field of view of the optical instrument; a larger FOV results in a wider field of view but a lower optical magnification.

[0061] The optical axis is a ray that passes perpendicularly through the center of an ideal lens. When rays parallel to the optical axis enter a convex lens, an ideal convex lens should have all rays converging at a single point behind the lens; this point where all rays converge is called the focal point.

[0062] An aperture stop is an edge, frame, or specially designed perforated barrier in an optical assembly used to limit the size of an imaging beam or a unit of imaging space.

[0063] An aperture stop is an aperture stop that limits the maximum tilt angle of the edge rays in an on-axis point imaging beam, i.e., the aperture stop with the smallest incident aperture angle.

[0064] The entrance pupil is the common entrance for light beams emitted from all points on the surface of an object.

[0065] The entrance pupil diameter is the effective aperture that restricts the incident light beam.

[0066] Aberration refers to the discrepancy between the results obtained from tracing non-paraxial rays and those obtained from tracing paraxial rays in a real optical system, and the deviation from the ideal state of Gaussian optics (first-order approximation theory or paraxial rays). Aberrations are mainly classified into spherical aberration, coma, field curvature, astigmatism, distortion, chromatic aberration, and wave aberration.

[0067] 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.

[0068] Zoom ratio refers to the ratio of the longest focal length to the shortest focal length of a zoom lens.

[0069] The telephoto end of a zoom lens indicates the focal length range of the zoom lens when it is in telephoto mode.

[0070] The short focal length of a zoom lens indicates the range of focal lengths in which the zoom lens, when in wide-angle mode, captures images where the foreground is large and the background is small.

[0071] The focusing group refers to the lens group in a zoom lens that moves along the optical axis of the zoom lens and is responsible for adjusting the focal length of the zoom lens.

[0072] The compensation group refers to the lens group in a zoom lens that moves along the optical axis of the zoom lens with the focusing group and is responsible for balancing and eliminating the aberrations caused by the focusing group during its movement.

[0073] A zoom lens is a camera lens that can change its focal length within a certain range to obtain different angles of view, image sizes, and the extent of the scene. Zoom lenses can change the shooting range by altering the focal length without changing the shooting distance, which is very beneficial for image composition. Because a single zoom lens can perform the function of several prime lenses, it is suitable for various shooting scenarios, reducing the number of lenses users need to carry and saving time when changing lenses.

[0074] Currently, most high-magnification zoom lenses in electronic devices on the market use a "jump zoom" approach, which involves using two or more lenses with different focal lengths, combined with algorithm-based digital zoom, to achieve hybrid optical zoom. During zooming, the image sharpness in the focal length transitions between these multiple lenses decreases compared to continuous optical zoom, thus affecting image quality. Furthermore, the inclusion of multiple lenses not only complicates the manufacturing process but also makes them less suitable for handheld mobile electronic devices with a strong need for miniaturization.

[0075] To address the aforementioned issues, this application provides a zoom lens that achieves a large zoom ratio and good image quality with a single lens, thereby reducing the number of camera lenses required and making it well-suited for miniaturized handheld mobile electronic devices.

[0076] For ease of description, the left side of the zoom lens is defined as the scene side (hereinafter also referred to as the object side), and the surface of the lens facing the object side can be called the object side surface, which can also be understood as the surface of the lens close to the object side. The right side of the zoom lens is defined as the image side (hereinafter also referred to as the image side), and the surface of the lens facing the image side can be called the image side surface, which can also be understood as the surface of the lens close to the image side.

[0077] Figure 1 This is a schematic diagram of an example of a zoom lens provided in an embodiment of this application. Wherein, Figure 1 (a) shows a schematic diagram of the zoom lens at the short focal length end; Figure 1 Figure (b) shows a schematic diagram of the zoom lens at the telephoto end.

[0078] like Figure 1 As shown, the zoom lens of this application embodiment includes: a first lens group 10 having positive optical power and a second lens group 20 having negative optical power arranged sequentially from the object side to the image side.

[0079] When a zoom lens zooms from its short focal length end to its long focal length end, that is... Figure 1 During the transition from state (a) to state (b), the first lens group 10 and the second lens group 20 move along the optical axis to the object side, and the distance between the first lens group 10 and the second lens group 20 gradually decreases.

[0080] The first lens group 10 has four lenses, each with a certain optical power. The reasonable distribution of the optical power of the multiple lenses enables the first lens group 10 to have positive optical power and the ability to converge light rays. Specifically, the first lens group 10 includes: a first lens 11 with positive optical power, a second lens 12 with negative optical power, a third lens 13 with optical power, and a fourth lens 14 with positive optical power, arranged sequentially from the object side to the image side.

[0081] The second lens group 20 is also composed of multiple lenses with a certain optical power. The reasonable distribution of the optical power of the multiple lenses enables the second lens group 20 to have negative optical power and the ability to diverge light.

[0082] The zoom lens provided in this application embodiment mainly utilizes the refraction principle of lenses for imaging. Light is refracted after passing through the zoom lens, forming a clear image on the focal plane, and the image of the scene is recorded by an electronic photosensitive element 50 located on the focal plane. The zoom lens includes a first lens group 10 and a second lens group 20 arranged sequentially from the object side to the image side. The first lens group 10 is a focusing lens group with positive optical power, which can converge light to compress the beam diameter entering the zoom lens. The first lens group 10 can move along the optical axis of the zoom lens to change the focal length of the zoom lens, enabling the zoom lens to achieve continuous zoom. The second lens group 20 is a compensation lens group with negative optical power, which can also move along the optical axis of the zoom lens to balance and eliminate the aberration effects generated by the first lens group 10 during the movement, so that the focal point of the zoom lens falls on the focal plane of the electronic photosensitive element 50, ensuring good image quality while meeting the large zoom ratio of the zoom lens.

[0083] The zoom lens provided in this application embodiment achieves continuous zoom through a single lens. Compared with the "jump-type" zoom lenses in the prior art, there is no focal length transition part of multiple lenses, thus eliminating the imaging quality problem of the focal length transition part. Therefore, the image clarity of the zoom lens can always be kept at a better level. At the same time, the layout of a single lens is also conducive to the structural optimization of electronic devices, which can better meet the design requirements of miniaturization.

[0084] Optionally, the first lens group 10 and the second lens group 20 are assembled through a lens barrel.

[0085] Optionally, the first lens group 10 and the second lens group 20 are driven by a motor. Specifically, the first lens group 10 is mounted on a first motor, which drives the first lens group 10 to move along the optical axis; the second lens group 20 is mounted on a second motor, which drives the second lens group 20 to move along the optical axis.

[0086] Optionally, the total number of lenses included in the first lens group 10 and the second lens group 20 is 7-12.

[0087] In some embodiments, the first lens group 10 consists of 4 lenses, and the second lens group 20 consists of 3 lenses. The 3 lenses constituting the second lens group 20 have positive optical power, negative optical power, and negative optical power, respectively. By reasonably distributing the optical power of the 3 lenses, the second lens group 20 as a whole has negative optical power.

[0088] In some embodiments, the first lens group 10 consists of 4 lenses, and the second lens group 20 consists of 6 lenses. The 6 lenses constituting the second lens group 20 have positive optical power, positive optical power, negative optical power, positive optical power, negative optical power, and negative optical power, respectively. By reasonably distributing the optical power of the 6 lenses, the second lens group 20 as a whole has negative optical power.

[0089] In some embodiments, the first lens group 10 consists of 4 lenses, and the second lens group 20 consists of 8 lenses. The 8 lenses constituting the second lens group 20 have positive optical power, negative optical power, positive optical power, negative optical power, negative optical power, negative optical power, negative optical power, and positive optical power, respectively. By reasonably distributing the optical power of the 8 lenses, the second lens group 20 as a whole has negative optical power.

[0090] In some embodiments, the first lens group 10 and the second lens group 20 each include four lenses, for a total of eight lenses. In the second lens group 20, the four lenses are defined as a fifth lens 25, a sixth lens 26, a seventh lens 27, and an eighth lens 28 arranged sequentially from the object side to the image side.

[0091] As mentioned earlier, each lens in the second lens group 20 also has a certain optical power. The reasonable distribution of the optical power of multiple lenses enables the second lens group 20 to have negative optical power. Specifically, the fifth lens 25 has optical power, the sixth lens 26 has optical power, the seventh lens 27 has negative optical power, and the fourth lens 14 has optical power, thus forming the second lens group 20 with negative optical power.

[0092] Optionally, the zoom lens also includes an aperture stop 30, which can be disposed on the object side of the first lens group 10, or the aperture stop 30 can be disposed on any lens in the first lens group 10. The effective light passage of the aperture stop 30 can be circular, the surface of the effective light passage can be perpendicular to the optical axis, and the center of the effective light passage can be located on the optical axis. The aperture stop 30 can be made of any material selected from plastic, aluminum alloy, beryllium aluminum alloy, titanium alloy, aluminum, beryllium, etc.

[0093] The aperture stop 30 ensures near-optical axis conditions, improves image quality, enhances image sharpness, controls the range of the imaged object space, and controls the brightness of the image plane. In this application, by adjusting the size of the aperture stop 30, a larger entrance pupil diameter can be obtained. With a fixed lens focal length, a smaller aperture value can be obtained, that is, a larger aperture and diffraction limit value can be obtained, which is beneficial to improving the image quality of the zoom lens.

[0094] Optionally, the zoom lens also includes an infrared cut-off filter 40, which is disposed on the image side of the eighth lens 28.

[0095] The infrared cut-off filter 40 can effectively block infrared light that interferes with image quality while maintaining high transmittance of visible light, making the resulting image more in line with the optimal perception of the human eye.

[0096] For ease of understanding and description, the embodiments of this application define the representation of relevant parameters of zoom lenses, for example, f represents the focal length of the zoom lens, and f... G1 The combined focal length of the first lens group 10, etc., are indicated by similar letters. These are merely illustrative and can be represented in other forms. This application does not impose any limitations on them.

[0097] It should also be noted that the units of the parameters involving ratios in the following relationships remain consistent. For example, the unit of the numerator is millimeters (mm), and the unit of the denominator is also millimeters.

[0098] Furthermore, zoom lenses satisfy the following relationship: 0.5 <f G1 / fw<0.8.

[0099] Among them, f G1 f is the focal length of the first lens group 10, and fw is the focal length of the zoom lens in the short focal length state.

[0100] It should be understood that the aforementioned zoom lens refers to the combination of the first lens group 10 and the second lens group 20. Additionally, f... G1 It is the focal length of the first lens group 10, that is, the combined focal length of the first lens 11 to the fourth lens 14 in the first lens group 10.

[0101] The above formula specifies that the ratio of the focal length of the first lens group 10 to the focal length of the zoom lens at the short focal length end is within the range of 0.5. <f G1 When the ratio / fw < 0.8, the axial spatial length of the first lens group 10 is limited, which helps to compress the overall optical length of the zoom lens and achieve miniaturization of the module structure. When the ratio is greater than 0.5, the zoom lens can maintain good image quality. Therefore, by combining the above constraints, the size of the zoom lens can be made smaller while ensuring the image quality of the zoom lens, thus making it more suitable for miniaturized handheld mobile electronic devices.

[0102] Optionally, the lenses in the first lens group 10 can be made of plastic or glass.

[0103] Optionally, the lenses in the first lens group 10 can also be other materials that can meet the refractive index requirements, such as composite materials in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into the resin matrix.

[0104] Optionally, the lenses in the second lens group 20 can be made of plastic or glass.

[0105] Optionally, the lenses in the second lens group 20 can also be other materials that can meet the refractive index requirements, such as composite materials in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into the resin matrix.

[0106] In some embodiments, the zoom lens satisfies the following relationship: TTLt / ft<1.0.

[0107] Where TTLt is the total optical length of the zoom lens in telephoto mode, and ft is the focal length of the zoom lens in telephoto mode.

[0108] The above formula specifies the ratio range of the total optical length of the zoom lens at the telephoto end to the focal length of the zoom lens at the telephoto end: TTLt / ft < 1.0. This allows the zoom lens to meet the telephoto characteristics while limiting the total optical length of the zoom lens, so as to achieve module miniaturization. At the same time, it is beneficial to make proportional scaling when the zoom lens architecture is the same.

[0109] Optionally, the object-side surface of the first lens 11 in the first lens group 10 is convex, and the image-side surface of the fourth lens 14 is convex.

[0110] The above-mentioned limitations further define the surface structure of the object-side surface of the first lens 11 and the image-side surface of the fourth lens 14 in the first lens group 10. The object-side surface of the first lens 11 in the first lens group 10 is convex, which helps to reduce spherical aberration. The image-side surface of the fourth lens 14 in the first lens group 10 is convex, which can effectively reduce spherical aberration and distortion, thereby improving the imaging quality of the zoom lens. At the same time, this design can also enhance the light-gathering ability of the first lens group 10 and extend the back focal length of the zoom lens. This allows the zoom lens to have a good imaging effect while minimizing the overall optical length of the zoom lens, thereby achieving the goal of miniaturization.

[0111] In some embodiments, the zoom lens satisfies the following relationship: FNOt<5.

[0112] Where FNOt is the aperture value of the zoom lens in telephoto mode.

[0113] The above formula specifies that the aperture value range of the zoom lens at the telephoto end is FNOt<5. This allows the zoom lens to display high resolution at the short focal length end, while also enabling the lens to have a large light transmission, improving imaging performance, and achieving clear imaging results even when shooting in darker environments.

[0114] In some embodiments, the zoom lens satisfies the following relationship: ft / fw < 1.6.

[0115] ft is the focal length of the zoom lens in telephoto mode, and fw is the focal length of the zoom lens in telephoto mode.

[0116] The aforementioned formula specifies that the ratio of the focal length of the zoom lens at its telephoto end to its focal length at its short focal end must be within the range ft / fw < 1.6, meaning the zoom ratio is less than 1.6. While meeting this zoom ratio requirement, the optical structure of the zoom lens in this application is relatively simple. Continuous zooming can be easily achieved through two lens groups, which facilitates module miniaturization while maintaining good image quality.

[0117] In some embodiments, the zoom lens satisfies the following relationship: TTLt / Imgh < 5.5.

[0118] Where TTLt is the total optical length of the zoom lens in telephoto mode, and Imgh is half the diagonal length of the 50-pixel area of ​​the electronic image sensor on the focusing plane.

[0119] The above formula specifies that the ratio of the total optical length of the zoom lens at the telephoto end to half the diagonal length of the 50-pixel area of ​​the electronic image sensor on the focusing plane is TTLt / Imgh < 5.5. While ensuring that the zoom lens has high-pixel images, limiting the total optical length of the zoom lens is beneficial to reducing the overall size and achieving miniaturization, while also taking into account good image quality.

[0120] In some embodiments, the zoom lens satisfies the following relationship: TT 1-n / TTLt<0.4.

[0121] Among them, TT 1-n TTLt is the sum of the thicknesses of all lenses in the first lens group 10 and the second lens group 20 along the optical axis, and TTLt is the total optical length of the zoom lens in the telephoto end state.

[0122] For example: the first lens group 10 and the second lens group 20 each include 4 lenses, TT 1-n This refers to the sum of the thicknesses of the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 25, the sixth lens 26, the seventh lens 27, and the eighth lens 28 along the optical axis.

[0123] It should be noted that TT 1-n Excluding the gap between two adjacent lenses.

[0124] The above formula specifies the range TT of the ratio of the sum of the thicknesses of all lenses in the first lens group 10 and the second lens group 20 along the optical axis to the total optical length of the zoom lens in the telephoto end state. 1-n A TTLt < 0.4 limits the thickness of all lenses in the first lens group 10 and the second lens group 20, which is beneficial for the manufacturing of zoom lenses, and also facilitates the achievement of a large zoom ratio and good zoom performance. This ratio range can effectively balance zoom performance and manufacturing manufacturability.

[0125] In some embodiments, the zoom lens satisfies the following relationship: 0.6 <f G1 / f1<1.2.

[0126] Among them, f G1 f1 is the focal length of the first lens group 10, and f1 is the focal length of the first lens 11.

[0127] The above formula specifies that the ratio of the focal length of the first lens group 10 to the focal length of the first lens 11 within the first lens group 10 is within the range of 0.6. <f G1 When / f1<1.2, satisfying this ratio range is beneficial for the reasonable distribution of the optical power of the lens, avoiding local concentration of optical power in the lens group and causing tolerance sensitivity, thereby reducing the difficulty of processing and manufacturing and improving the yield rate.

[0128] In some embodiments, the zoom lens satisfies the following relationship: 0.6 <f G1 / f4<1.2.

[0129] Among them, f G1 f is the focal length of the first lens group 10, and f4 is the focal length of the fourth lens 14.

[0130] The above formula specifies that the ratio of the focal length of the first lens group 10 to the focal length of the fourth lens 14 in the first lens group 10 is within the range of 0.6. <f G1 When f4 < 1.2, it is beneficial to rationally allocate the optical power of the lens and avoid local concentration of optical power in the lens group, which would cause tolerance sensitivity. This reduces the difficulty of processing and manufacturing and helps to improve the yield rate.

[0131] Optionally, the first lens 11 can be made of plastic or glass, or other materials that meet the performance requirements of the first lens 11, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The first lens 11 has positive optical power. The object-side surface of the first lens 11 is convex near the optical axis, and the image-side surface of the first lens 11 is concave near the optical axis. The object-side surface of the first lens 11 is convex near the periphery, and the image-side surface of the first lens 11 is concave near the periphery.

[0132] Optionally, the second lens 12 can be made of plastic or glass, or other materials that meet the performance requirements of the second lens 12, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The second lens 12 has negative optical power. The object-side surface of the second lens 12 can be convex or concave near the optical axis, while the image-side surface of the second lens 12 is concave near the optical axis. The object-side surface of the second lens 12 can be convex or concave near the periphery, while the image-side surface of the second lens 12 is concave near the periphery.

[0133] Optionally, the third lens 13 can be made of plastic or glass, or other materials that meet the performance requirements of the third lens 13, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The third lens 13 can have positive or negative optical power. The object-side surface of the third lens 13 can be convex or concave near the optical axis, while the image-side surface of the third lens 13 is concave near the optical axis. The object-side surface of the third lens 13 can be convex or concave near the periphery, while the image-side surface of the third lens 13 is concave near the periphery.

[0134] Optionally, the fourth lens 14 can be made of plastic or glass, or other materials that meet the performance requirements of the fourth lens 14, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The fourth lens 14 has negative optical power. The object-side surface of the fourth lens 14 is convex near the optical axis, and the image-side surface of the fourth lens 14 is also convex near the optical axis. The object-side surface of the fourth lens 14 is convex near the periphery, and the image-side surface of the fourth lens 14 is also convex near the periphery.

[0135] Optionally, the fifth lens 25 can be made of plastic or glass, or other materials that meet the performance requirements of the fifth lens 25, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The fifth lens 25 can have positive or negative optical power. The object-side surface of the fifth lens 25 is concave near the optical axis, while the image-side surface of the fifth lens 25 can be convex or concave near the optical axis. The object-side surface of the fifth lens 25 can be convex or concave near its periphery, and the image-side surface of the fifth lens 25 can also be convex or concave near its periphery.

[0136] Optionally, the sixth lens 26 can be made of plastic or glass, or other materials that meet the performance requirements of the sixth lens 26, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The sixth lens 26 can have positive or negative optical power. The object-side surface of the sixth lens 26 is concave near the optical axis, while the image-side surface of the sixth lens 26 can be convex or concave near the optical axis. The object-side surface of the sixth lens 26 can be convex or concave near its periphery, and the image-side surface of the sixth lens 26 can also be convex or concave near its periphery.

[0137] Optionally, the seventh lens 27 can be made of plastic or glass, or other materials that meet the performance requirements of the seventh lens 27, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The seventh lens 27 has negative optical power. The object-side surface of the seventh lens 27 can be convex or concave near the optical axis, and the image-side surface of the seventh lens 27 can also be convex or concave near the optical axis. The object-side surface of the seventh lens 27 can be convex or concave near the periphery, and the image-side surface of the seventh lens 27 can also be convex or concave near the periphery.

[0138] Optionally, the eighth lens 28 can be made of plastic or glass, or other materials that meet the performance requirements of the eighth lens 28, such as composite materials incorporating fine particles of inorganic metal oxides or inorganic metal sulfides into a resin matrix. The eighth lens 28 can have positive or negative optical power. The object-side surface of the eighth lens 28 near the optical axis can be convex or concave, and the image-side surface of the eighth lens 28 near the optical axis can also be convex or concave. The object-side surface of the eighth lens 28 near its periphery can also be convex or concave, and the image-side surface of the eighth lens 28 near its periphery can also be convex or concave.

[0139] Optionally, the first lens 11, second lens 12, third lens 13, and fourth lens 14 in the first lens group 10, and the fifth lens 25, sixth lens 26, seventh lens 27, and eighth lens 28 in the second lens group 20, are all made of plastic. This allows for control of the zoom lens's weight, thereby reducing the difficulty of designing and manufacturing the motor in the lens module 100. Furthermore, based on the characteristics of injection molding, plastic materials can achieve high-precision surface shapes such as spherical, aspherical, and freeform surfaces, meeting the surface shape requirements of each lens in the first lens group 10 and the second lens group 20 as specified in this application.

[0140] Optionally, the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14 in the first lens group 10, and the fifth lens 25, the sixth lens 26, the seventh lens 27, and the eighth lens 28 in the second lens group 20 can adopt a hybrid design of glass and plastic materials. Glass allows for more choices of refractive index and Abbe coefficient to achieve the design of large-aperture or super-large-aperture camera lenses and optical systems. Furthermore, the hybrid design of glass and plastic materials in zoom lenses can also provide more architectural possibilities for optical design, making it easier to obtain miniaturized zoom lenses with strong aberration correction capabilities.

[0141] The following will combine Figures 1 to 21 Some specific, but not limiting, examples of embodiments of this application are described in more detail.

[0142] Example 1 Figure 1 A schematic diagram of the zoom lens in Embodiment 1 is shown. Wherein, Figure 1 (a) shows a schematic diagram of the zoom lens of Embodiment 1 at the short focal length end; Figure 1 (b) shows a schematic diagram of the zoom lens of Embodiment 1 at the telephoto end.

[0143] like Figure 1 The zoom lens shown includes a first lens group 10 and a second lens group 20. The first lens group 10 consists of a first lens 11 with positive optical power, a second lens 12 with negative optical power, a third lens 13 with positive optical power, and a fourth lens 14 with positive optical power. The second lens group 20 consists of a fifth lens 25 with positive optical power, a sixth lens 26 with negative optical power, a seventh lens 27 with negative optical power, and an eighth lens 28 with positive optical power.

[0144] Based on the above relationship, the design parameters of the zoom lens in Embodiment 1 of this application are shown in Table 1A below.

[0145] Table 1A Design Parameters for Example 1

[0146] Table 1B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 1 of this application, as shown in Table 1B.

[0147] Table 1B Aspherical coefficient of zoom lens in Example 1

[0148] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0149] In Embodiment 1 of this application, the aspherical surface shape equations of each surface can be: Where z is a point on the aspherical surface at a distance r from the optical axis, and its relative distance to the tangent plane at the intersection point on the optical axis of the aspherical surface; r is the perpendicular distance between a point on the aspherical curve and the optical axis; c is the curvature; k is the conic coefficient; and A4 to A20 are the aspherical coefficients.

[0150] It should be understood that the aspherical surfaces of the various lenses in a zoom lens can use the aspherical surfaces shown in the above-mentioned aspherical surface shape equation, or other aspherical formulas, and this application does not limit them.

[0151] Table 1C shows the basic parameters of the zoom lens in Embodiment 1 of this application, as shown in Table 1C.

[0152] Table 1C Basic Parameters of Zoom Lens in Example 1

[0153] In Table 1C, f represents the focal length of the zoom lens, FNO represents the aperture value, FOV represents the field of view, TTL represents the total optical length, d1 represents the gap between the aperture stop 30 and the object side of the first lens 11 on the optical axis, d9 represents the gap between the image side of the fourth lens 14 and the object side of the fifth lens 25 on the optical axis, and d18 represents the gap between the image side of the eighth lens 28 and the object side of the infrared cut-off filter 40 on the optical axis.

[0154] Figure 2 The diagram shows the astigmatism curves of light with a wavelength of 555nm after passing through the zoom lens of Example 1. Figure 2 The solid line represents the focal offset in the meridional direction, and the dashed line represents the focal offset in the sagittal direction.

[0155] in, Figure 2 (a) shows a schematic diagram of the astigmatism curve of a zoom lens at the short focal length end. Figure 2As can be seen from (a) in the figure, the focal offset in the meridional direction is controlled within the range of 0~0.005mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.02mm; Figure 2 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 2 As can be seen in (b), the focal offset in the meridional direction is controlled within the range of 0~0.005mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.02mm. It can be seen that astigmatism and field curvature have been strictly corrected, resulting in excellent image quality.

[0156] Figure 3 A schematic diagram of the distortion curves of light with a wavelength of 555nm after passing through the zoom lens of Example 1 is shown.

[0157] in, Figure 3 (a) shows a schematic diagram of the distortion curve of a zoom lens at the short focal length end. Figure 3 As can be seen from (a) in the figure, the distorted variable is controlled within the range of 0~2.5%; Figure 3 (b) shows a schematic diagram of the distortion curve of a zoom lens at the telephoto end. Figure 3 As shown in (b), the distortion is controlled within the range of 0-1%. The maximum distortion of this zoom lens is within 2.5%, indicating low distortion and good image quality.

[0158] Example 2 Figure 4 A schematic diagram of the zoom lens in Embodiment 2 is shown. Wherein, Figure 4 (a) shows a schematic diagram of the zoom lens in the short focal length end of Embodiment 2; Figure 4 (b) shows a schematic diagram of the zoom lens in the telephoto end of Embodiment 2.

[0159] like Figure 4 The zoom lens shown includes a first lens group 10 and a second lens group 20. The first lens group 10 consists of a first lens 11 with positive optical power, a second lens 12 with negative optical power, a third lens 13 with positive optical power, and a fourth lens 14 with positive optical power. The second lens group 20 consists of a fifth lens 25 with positive optical power, a sixth lens 26 with negative optical power, a seventh lens 27 with negative optical power, and an eighth lens 28 with positive optical power.

[0160] Based on the above relationship, the design parameters of the zoom lens in Embodiment 2 of this application are shown in Table 2A below.

[0161] Table 2A Design Parameters for Example 2

[0162] Table 2B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 2 of this application, as shown in Table 2B.

[0163] Table 2B Aspherical coefficient of zoom lens in Example 2

[0164] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0165] The aspherical surfaces of each lens in the zoom lens in this embodiment 2 can use the aspherical surface shape equation in embodiment 1, or other aspherical formulas, which are not limited in this application.

[0166] Table 2C shows the basic parameters of the zoom lens in Embodiment 2 of this application, as shown in Table 2C.

[0167] Table 2C Basic Parameters of Zoom Lens in Example 2

[0168] In Table 2C, f represents the focal length of the zoom lens, FNO represents the aperture value, FOV represents the field of view, TTL represents the total optical length, d1 represents the gap between the aperture stop 30 and the object side of the first lens 11 on the optical axis, d9 represents the gap between the image side of the fourth lens 14 and the object side of the fifth lens 25 on the optical axis, and d18 represents the gap between the image side of the eighth lens 28 and the object side of the infrared cut-off filter 40 on the optical axis.

[0169] Figure 5 A schematic diagram of the astigmatism curves of light with a wavelength of 555nm after passing through the zoom lens of Example 2 is shown. Figure 5 The solid line represents the focal offset in the meridional direction, and the dashed line represents the focal offset in the sagittal direction.

[0170] in, Figure 5 (a) shows a schematic diagram of the astigmatism curve of a zoom lens at the short focal length end. Figure 5 As can be seen from (a) in the figure, the focal offset in the meridional direction is controlled within the range of 0~0.01mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.02mm; Figure 5 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 5 As can be seen in (b), the focal offset in the meridional direction is controlled within the range of 0~0.005mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.02mm. It can be seen that astigmatism and field curvature have been strictly corrected, resulting in excellent image quality.

[0171] Figure 6 A schematic diagram of the distortion curves of light with a wavelength of 555nm after passing through the zoom lens of Example 2 is shown.

[0172] in, Figure 6 (a) shows a schematic diagram of the distortion curve of a zoom lens at the short focal length end. Figure 6 As can be seen from (a) in the figure, the distorted variable is controlled within the range of 0~2%; Figure 6 (b) shows a schematic diagram of the distortion curve of a zoom lens at the telephoto end. Figure 6 As shown in (b), the distortion is controlled within the range of 0-1%. The maximum distortion of this zoom lens is within 2%, indicating low distortion and good image quality.

[0173] Example 3 Figure 7 A schematic diagram of the zoom lens in Embodiment 3 is shown. Wherein, Figure 7 (a) shows a schematic diagram of the zoom lens of Embodiment 3 at the short focal length end; Figure 7 (b) shows a schematic diagram of the zoom lens in the telephoto end of Embodiment 3.

[0174] like Figure 7 The zoom lens shown includes a first lens group 10 and a second lens group 20. The first lens group 10 consists of a first lens 11 with positive optical power, a second lens 12 with negative optical power, a third lens 13 with positive optical power, and a fourth lens 14 with positive optical power. The second lens group 20 consists of a fifth lens 25 with negative optical power, a sixth lens 26 with positive optical power, a seventh lens 27 with negative optical power, and an eighth lens 28 with positive optical power.

[0175] Based on the above relationship, the design parameters of the zoom lens in Embodiment 3 of this application are shown in Table 3A below.

[0176] Table 3A Design Parameters for Example 3

[0177] Table 3B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 3 of this application, as shown in Table 3B.

[0178] Table 3B Aspherical coefficient of zoom lens in Example 3

[0179] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0180] The aspherical surfaces of each lens in the zoom lens in this embodiment three can use the aspherical surface shape equation in embodiment one, or other aspherical formulas, which are not limited in this application.

[0181] Table 3C shows the basic parameters of the zoom lens in Embodiment 3 of this application.

[0182] Table 3C Example 3 Basic Parameters of Zoom Lens

[0183] In Table 3C, f represents the focal length of the zoom lens, FNO represents the aperture value, FOV represents the field of view, TTL represents the total optical length, d1 represents the gap between the aperture stop 30 and the object side of the first lens 11 on the optical axis, d9 represents the gap between the image side of the fourth lens 14 and the object side of the fifth lens 25 on the optical axis, and d18 represents the gap between the image side of the eighth lens 28 and the object side of the infrared cut-off filter 40 on the optical axis.

[0184] Figure 8 The diagram shows the astigmatism curves of light with a wavelength of 555nm after passing through the zoom lens of Example 3. Figure 8 The solid line represents the focal offset in the meridional direction, and the dashed line represents the focal offset in the sagittal direction.

[0185] in, Figure 8 (a) shows a schematic diagram of the astigmatism curve of a zoom lens at the short focal length end. Figure 8 As can be seen from (a) in the figure, the focal offset in the meridional direction is controlled within the range of 0~0.015mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.02mm; Figure 8 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 8 As shown in (b), the focal offset in the meridional direction is controlled within the range of 0~0.01mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.025mm. It can be seen that astigmatism and field curvature have been strictly corrected, resulting in excellent image quality.

[0186] Figure 9 A schematic diagram of the distortion curves of light with a wavelength of 555nm after passing through the zoom lens of Example 3 is shown.

[0187] in, Figure 9 (a) shows a schematic diagram of the distortion curve of a zoom lens at the short focal length end. Figure 9 As can be seen from (a) in the figure, the distorted variable is controlled within the range of 0~2.5%; Figure 9 (b) shows a schematic diagram of the distortion curve of a zoom lens at the telephoto end. Figure 9As shown in (b), the distortion is controlled within the range of 0-1%. The maximum distortion of this zoom lens is within 2.5%, indicating low distortion and good image quality.

[0188] Example 4 Figure 10 A schematic diagram of the zoom lens in Embodiment 4 is shown. Wherein, Figure 10 (a) shows a schematic diagram of the zoom lens in the short focal length end of Embodiment 4; Figure 10 (b) shows a schematic diagram of the zoom lens in the telephoto end of Embodiment 4.

[0189] like Figure 10 The zoom lens shown includes a first lens group 10 and a second lens group 20. The first lens group 10 consists of a first lens 11 with positive optical power, a second lens 12 with negative optical power, a third lens 13 with positive optical power, and a fourth lens 14 with positive optical power. The second lens group 20 consists of a fifth lens 25 with negative optical power, a sixth lens 26 with positive optical power, a seventh lens 27 with negative optical power, and an eighth lens 28 with negative optical power.

[0190] It should be noted that in this fourth embodiment, the aperture stop 30 can be positioned on any lens within the first lens group 10, and can move along with the first lens group 10. Figure 10 The example of setting the aperture stop 30 on the object side of the second lens 12 does not mean that the aperture stop 30 is only set on the second lens 12. It should be understood that the aperture stop 30 can also be set on the first lens 11, the third lens 13, and the fourth lens 14, and can move with the first lens group 10.

[0191] Based on the above relationship, the design parameters of the zoom lens in Embodiment 4 of this application are shown in Table 4A below.

[0192] Table 4A Design Parameters for Example 4

[0193] Table 4B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 4 of this application, as shown in Table 4B.

[0194] Table 4B Aspherical coefficient of zoom lens in Example 4

[0195] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0196] The aspherical surfaces of each lens in the zoom lens in this embodiment four can use the aspherical surface shape equation in embodiment one, or other aspherical formulas, which are not limited in this application.

[0197] Table 4C shows the basic parameters of the zoom lens in Embodiment 4 of this application, as shown in Table 4C.

[0198] Table 4C Example 4 Basic Parameters of Zoom Lens

[0199] In Table 4C, f represents the focal length of the zoom lens, FNO represents the aperture value, FOV represents the field of view, TTL represents the total optical length, d9 represents the gap on the optical axis between the image side of the fourth lens 14 and the object side of the fifth lens 25, and d18 represents the gap on the optical axis between the image side of the eighth lens 28 and the object side of the infrared cut-off filter 40.

[0200] Figure 11 A schematic diagram of the astigmatism curves of light with a wavelength of 555nm after passing through the zoom lens of Example 4 is shown. Figure 11 The solid line represents the focal offset in the meridional direction, and the dashed line represents the focal offset in the sagittal direction.

[0201] in, Figure 11 (a) shows a schematic diagram of the astigmatism curve of a zoom lens at the short focal length end. Figure 11 As can be seen from (a) in the figure, the focal offset in the meridional direction is controlled within the range of 0~0.025mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.025mm; Figure 11 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 11 As can be seen in (b), the focal offset in the meridional direction is controlled within the range of 0~0.025mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.05mm. It can be seen that astigmatism and field curvature have been strictly corrected, resulting in excellent image quality.

[0202] Figure 12 A schematic diagram of the distortion curves of light with a wavelength of 555nm after passing through the zoom lens of Example 4 is shown.

[0203] in, Figure 12 (a) shows a schematic diagram of the distortion curve of a zoom lens at the short focal length end. Figure 12 As can be seen from (a) in the figure, the distorted variable is controlled within the range of 0~2%; Figure 12 (b) shows a schematic diagram of the distortion curve of a zoom lens at the telephoto end. Figure 12As shown in (b), the distortion is controlled within the range of 0-0.2%. The maximum distortion of this zoom lens is within 2%, indicating low distortion and good image quality.

[0204] Example 5 Figure 13 A schematic diagram of the zoom lens in Embodiment 5 is shown. Wherein, Figure 13 (a) shows a schematic diagram of the zoom lens of Embodiment 5 at the short focal length end; Figure 13 (b) shows a schematic diagram of the zoom lens of Embodiment 5 at the telephoto end.

[0205] like Figure 13 The zoom lens shown includes a first lens group 10 and a second lens group 20. The first lens group 10 consists of a first lens 11 with positive optical power, a second lens 12 with negative optical power, a third lens 13 with negative optical power, and a fourth lens 14 with positive optical power. The second lens group 20 consists of a fifth lens 25 with positive optical power, a sixth lens 26 with negative optical power, a seventh lens 27 with negative optical power, and an eighth lens 28 with negative optical power.

[0206] Based on the above relationship, the design parameters of the zoom lens in Embodiment 5 of this application are shown in Table 5A below.

[0207] Table 5A Design Parameters for Example 5

[0208] Table 5B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 5 of this application, as shown in Table 5B.

[0209] Table 5B Aspherical coefficient of zoom lens in Example 5

[0210] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0211] The aspherical surfaces of each lens in the zoom lens in this embodiment five can use the aspherical surface shape equation in embodiment one, or other aspherical formulas, which are not limited in this application.

[0212] Table 5C shows the basic parameters of the zoom lens in Embodiment 5 of this application, as shown in Table 5C.

[0213] Table 5C Example 5 Basic Parameters of Zoom Lens

[0214] In Table 5C, f represents the focal length of the zoom lens, FNO represents the aperture value, FOV represents the field of view, TTL represents the total optical length, d1 represents the gap between the aperture stop 30 and the object side of the first lens 11 on the optical axis, d9 represents the gap between the image side of the fourth lens 14 and the object side of the fifth lens 25 on the optical axis, and d18 represents the gap between the image side of the eighth lens 28 and the object side of the infrared cut-off filter 40 on the optical axis.

[0215] Figure 14 A schematic diagram of the astigmatism curves of light with a wavelength of 555nm after passing through the zoom lens of Example 5 is shown. Figure 14 The solid line represents the focal offset in the meridional direction, and the dashed line represents the focal offset in the sagittal direction.

[0216] in, Figure 14 (a) shows a schematic diagram of the astigmatism curve of a zoom lens at the short focal length end. Figure 14 As can be seen from (a) in the figure, the focal offset in the meridional direction is controlled within the range of 0~0.01mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.025mm; Figure 14 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 14 As can be seen in (b), the focal offset in the meridional direction is controlled within the range of 0~0.005mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.02mm. It can be seen that astigmatism and field curvature have been strictly corrected, resulting in excellent image quality.

[0217] Figure 15 A schematic diagram of the distortion curves of light with a wavelength of 555nm after passing through the zoom lens of Example 5 is shown.

[0218] in, Figure 15 (a) shows a schematic diagram of the distortion curve of a zoom lens at the short focal length end. Figure 15 As can be seen from (a) in the figure, the distorted variable is controlled within the range of 0~2.5%; Figure 15 (b) shows a schematic diagram of the distortion curve of a zoom lens at the telephoto end. Figure 15 As shown in (b), the distortion is controlled within the range of 0-1%. The maximum distortion of this zoom lens is within 2.5%, indicating low distortion and good image quality.

[0219] Example 6 Figure 16 A schematic diagram of the zoom lens in Embodiment Six is ​​shown. Wherein, Figure 16 (a) shows a schematic diagram of the zoom lens of Embodiment Six at the short focal length end; Figure 16(b) shows a schematic diagram of the zoom lens of Embodiment Six at the telephoto end.

[0220] like Figure 16 The zoom lens shown includes a first lens group 10 and a second lens group 20. The first lens group 10 consists of a first lens 11 with positive optical power, a second lens 12 with negative optical power, a third lens 13 with positive optical power, and a fourth lens 14 with positive optical power. The second lens group 20 consists of a fifth lens 25 with negative optical power, a sixth lens 26 with positive optical power, a seventh lens 27 with negative optical power, and an eighth lens 28 with negative optical power.

[0221] Based on the above relationship, the design parameters of the zoom lens in Embodiment Six of this application are shown in Table 6A below.

[0222] Table 6A Design Parameters for Example Six

[0223] Table 6B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 6 of this application, as shown in Table 6B.

[0224] Table 6B Aspherical coefficient of zoom lens in Example 6

[0225] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0226] The aspherical surfaces of each lens in the zoom lens in this embodiment six can use the aspherical surface shape equation in embodiment one, or other aspherical formulas, which are not limited in this application.

[0227] Table 6C shows the basic parameters of the zoom lens in Embodiment 6 of this application, as shown in Table 6C.

[0228] Table 6C Example 6 Basic Parameters of Zoom Lens

[0229] In Table 6C, f represents the focal length of the zoom lens, FNO represents the aperture value, FOV represents the field of view, TTL represents the total optical length, d1 represents the gap between the aperture stop 30 and the object side of the first lens 11 on the optical axis, d9 represents the gap between the image side of the fourth lens 14 and the object side of the fifth lens 25 on the optical axis, and d18 represents the gap between the image side of the eighth lens 28 and the object side of the infrared cut-off filter 40 on the optical axis.

[0230] Figure 17A schematic diagram of the astigmatism curves of light with a wavelength of 555nm after passing through the zoom lens of Example 6 is shown. Figure 17 The solid line represents the focal offset in the meridional direction, and the dashed line represents the focal offset in the sagittal direction.

[0231] in, Figure 17 (a) shows a schematic diagram of the astigmatism curve of a zoom lens at the short focal length end. Figure 17 As can be seen from (a) in the figure, the focal offset in the meridional direction is controlled within the range of 0~0.01mm, and the focal offset in the sagittal direction is controlled within the range of 0~0.01mm; Figure 17 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 17 As can be seen in (b), the focal offset in the meridional direction is controlled within the range of 0~0.03mm, and the focal offset in the sagittal direction is also controlled within the range of 0~0.03mm. This demonstrates that astigmatism and field curvature have been rigorously corrected, resulting in excellent image quality.

[0232] Figure 18 A schematic diagram of the distortion curves of light with a wavelength of 555nm after passing through the zoom lens of Example 6 is shown.

[0233] in, Figure 18 (a) shows a schematic diagram of the distortion curve of a zoom lens at the short focal length end. Figure 18 As can be seen from (a) in the figure, the distorted variable is controlled within the range of 0~2.5%; Figure 18 (b) shows a schematic diagram of the distortion curve of a zoom lens at the telephoto end. Figure 18 As shown in (b), the distortion is controlled within the range of 0-1%. The maximum distortion of this zoom lens is within 2.5%, indicating low distortion and good image quality.

[0234] Table 7 lists the conditions satisfied by the above zoom lens and the values ​​of each condition in the embodiments of this application.

[0235] Table 7. Conditions satisfied by zoom lenses and their corresponding values.

[0236] The zoom lens provided in this application embodiment has advantages such as large zoom ratio, excellent image quality, miniaturization, easy processing and manufacturing, and high yield rate when its design parameters meet the above-mentioned corresponding conditions.

[0237] This application embodiment also provides a lens module 100, which includes a reflector 60, an electronic photosensitive element 50, and the aforementioned zoom lens. The reflector 60 is located on the object side of the zoom lens and is used to deflect light onto the zoom lens. The electronic photosensitive element 50 is located on the image side of the zoom lens and is used to image light onto the electronic photosensitive element 50.

[0238] The reflector 60 can be set at any desired angle to bend the light path. The reflector 60 deflects the light to the first lens group 10 of the zoom lens. After passing through the first lens group 10, the second lens group 20 and the infrared cut-off filter 40 in sequence, the light is imaged on the electronic photosensitive element 50.

[0239] Figure 19 This is a schematic diagram of an example of the lens module 100 provided in the embodiments of this application. Figure 20 This is a schematic diagram of yet another example of the lens module 100 provided in the embodiments of this application.

[0240] like Figure 19 As shown, in some embodiments, the reflector 60 is a prism, which includes two straight edges and one bevel. Light enters the prism through one straight edge, is reflected by the bevel, and exits the prism through the other straight edge. The bevel can form a 45° angle with the optical axis of the zoom lens, and this angle can be adjusted as needed. This application does not strictly limit the structure of the prism, the position of the bevel, or the angle.

[0241] like Figure 20 As shown, in some embodiments, the reflector 60 is a mirror, and the reflecting surface of the mirror can form a 45° angle with the optical axis of the zoom lens. This angle can also be adjusted as needed. This application does not strictly limit the position, angle, etc. of the reflecting surface of the mirror.

[0242] Optionally, the reflective surface of the mirror can be a metal reflective film layer prepared by vapor deposition or sputtering, and the metal can be nickel, aluminum, silver, gold, or their alloys.

[0243] The electronic photosensitive element 50 is a semiconductor chip containing hundreds of thousands to millions of photodiodes on its surface, which generate electrical charges when exposed to light. The electronic photosensitive element 50 can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) device. CCDs are made using a highly sensitive semiconductor material that converts light into electrical charges. CCDs consist of many photosensitive units, typically measured in megapixels. When the surface of a CCD is illuminated, each photosensitive unit reflects a charge onto the component; the signals generated by all the photosensitive units are added together to form a complete image. CMOS devices primarily utilize semiconductors made of silicon and germanium, allowing N-type (negative) and P-type (positive) semiconductors to coexist on the CMOS. The current generated by these complementary effects can be recorded and interpreted by the processing chip as an image.

[0244] In this embodiment, the reflector 60 can change the direction of light propagation, so that the optical axis direction of the zoom lens can be different from the direction of external light entering the electronic device, thereby making the arrangement position and angle of the zoom lens more flexible. For example, the optical axis direction of the zoom lens can be parallel to the display screen 300 of the electronic device, thereby reducing the size requirements of the accommodating space in the thickness direction of the electronic device.

[0245] Furthermore, since the lens module 100 uses the aforementioned zoom lens, it also has advantages such as a large zoom ratio, excellent image quality, miniaturization, ease of manufacturing, and high yield rate, which are consistent with zoom lenses.

[0246] Optionally, the lens module 100 may also include some or all of the following components (not shown in the figure): a holder, an autofocus drive assembly, a circuit board, a connector, and peripheral electronic components. The holder can be used to fix the lens, and the autofocus drive assembly may include a voice coil motor, a drive integrated circuit, etc., for autofocusing or optical image stabilization of the lens. The circuit board may be a flexible printed circuit (FPC) or a printed circuit board (PCB) for transmitting electrical signals. The FPC may be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board, a rigid-flexible board, or a hybrid flexible circuit board.

[0247] Figure 21 This is a schematic diagram of the electronic device provided in the embodiments of this application. Figure 21Parts (a) and (b) are the front view and rear view of the electronic device, respectively.

[0248] like Figure 21 As shown in the illustration, this application also provides an electronic device. This electronic device includes the lens module 100 provided in the foregoing embodiments, and further includes a processor. The lens module 100 is used to acquire image data and input the image data into the processor, which is used to process the image data.

[0249] The number of lens modules 100 installed is not limited to one; it can be two or even more, for example, two lens modules 100 can be installed on the back of an electronic device. This application embodiment does not limit the number of lens modules 100 installed.

[0250] Lens module 100 can be used to shoot external videos or photos, and can be used to capture scenes at different distances. For example, lens module 100 can be used to shoot distant scenes, close-up scenes, and macro scenes. Lens module 100 can also be used for selfies. Figure 21 The lens module 100 shown on the back of the phone can also be used for a front-facing camera, etc.

[0251] In addition, the electronic device also includes a housing 200 and a display screen 300. The display screen 300 is mounted on the housing 200, and an accommodating space is formed inside the housing 200. The lens module 100 can be installed in the accommodating space. The display screen 300 is electrically connected to the processor and can display images or videos processed by the processor.

[0252] Because the lens module 100 has the advantage of miniaturization, its size requirement for the storage space is reduced. Therefore, the electronic device can be made thinner and lighter by reducing the thickness of the housing 200. Alternatively, the storage space saved by the lens module 100 can be made available for other functional components without changing the thickness of the housing 200.

[0253] Optionally, the display screen 300 may be a light-emitting diode (LED) display screen 300, a liquid crystal display (LCD) display screen 300, or an organic light-emitting diode (OLED) display screen 300, but is not limited to these.

[0254] Optionally, the housing 200 may also include other components, such as a battery, flash, fingerprint recognition module, earpiece, circuit board, sensor, etc., but is not limited thereto.

[0255] Optionally, the electronic device can be a terminal device with video or photo capture capabilities, such as a mobile phone, tablet computer, laptop computer, camcorder, video recorder, camera, intelligent robot, or other devices with photo or video capture capabilities.

[0256] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope 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. An electronic device, characterized in that, The camera includes a first lens group (10) with positive optical power and a second lens group (20) with negative optical power, arranged sequentially from the object side to the image side. When the camera zooms from the short focal length end to the long focal length end, the first lens group (10) and the second lens group (20) move along the optical axis to the object side, and the distance between the first lens group (10) and the second lens group (20) gradually decreases. The first lens group (10) includes a first lens (11) with positive optical power, a second lens (12) with negative optical power, a third lens (13) with optical power, and a fourth lens (14) with positive optical power, arranged sequentially from the object side to the image side. The camera satisfies the following relationship: ft / fw < 1.6; Where ft is the focal length of the camera in telephoto mode and fw is the focal length of the camera in telephoto mode.

2. The electronic device according to claim 1, characterized in that, The camera satisfies the following relationship: FNOt<5; Wherein, FNOt is the aperture value of the camera in telephoto mode.

3. The electronic device according to claim 1 or 2, characterized in that, The camera satisfies the following relationship: TTLt / Imgh < 5.5; Where TTLt is the total optical length of the camera in the telephoto end state, and Imgh is half the diagonal length of the pixel area of ​​the electronic photosensitive element (50) on the focusing plane.

4. The electronic device according to any one of claims 1 to 3, characterized in that, The camera satisfies the following relationship: 0.6<f G1 / f1<1.2; Among them, f G1 f1 is the focal length of the first lens group (10) and f1 is the focal length of the first lens (11).

5. The electronic device according to any one of claims 1 to 4, characterized in that, The camera satisfies the following relationship: 0.6<f G1 / f4<1.2; Among them, f G1 f4 is the focal length of the first lens group (10), and f4 is the focal length of the fourth lens (14).

6. The electronic device according to any one of claims 1 to 5, characterized in that, The second lens group (20) includes a fifth lens (25) with optical power, a sixth lens (26) with optical power, a seventh lens (27) with negative optical power, and an eighth lens (28) with optical power, arranged sequentially from the object side to the image side.

7. The electronic device according to any one of claims 1 to 6, characterized in that, The camera satisfies the following relationship: 0.5<f G1 / fw<0.8; Among them, f G1 fw is the focal length of the first lens group (10), and fw is the focal length of the camera in the short focal length state.

8. The electronic device according to any one of claims 1 to 7, characterized in that, The camera satisfies the following relationship: TTLt / ft < 1.0; Where TTLt is the total optical length of the camera in telephoto mode, and ft is the focal length of the camera in telephoto mode.

9. The electronic device according to any one of claims 1 to 8, characterized in that, The object side of the first lens (11) is convex, and the image side of the fourth lens (14) is convex.

10. The electronic device according to any one of claims 1 to 9, characterized in that, The camera satisfies the following relationship: TT 1-n / TTLt<0.4; Among them, TT 1-n TTLt is the sum of the thicknesses of all lenses in the first lens group (10) and the second lens group (20) along the optical axis, and TTLt is the total optical length of the camera in the telephoto end state.

11. A zoom lens, characterized in that, include: A first lens group (10) with positive optical power and a second lens group (20) with negative optical power are arranged sequentially from the object side to the image side. When the zoom lens zooms from the short focal length end to the long focal length end, the first lens group (10) and the second lens group (20) move along the optical axis to the object side, and the distance between the first lens group (10) and the second lens group (20) gradually decreases. The first lens group (10) includes: a first lens (11) with positive optical power, a second lens (12) with negative optical power, a third lens (13) with optical power, and a fourth lens (14) with positive optical power, arranged sequentially from the object side to the image side. The zoom lens satisfies the following relationship: ft / fw < 1.6; Where ft is the focal length of the zoom lens in the telephoto end state, and fw is the focal length of the zoom lens in the short focal length end state.

12. The zoom lens according to claim 11, characterized in that, The zoom lens satisfies the following relationship: 0.5<f G1 / fw<0.8; Among them, f G1 fw is the focal length of the first lens group (10), and fw is the focal length of the zoom lens in the short focal length state.

13. The zoom lens according to claim 11 or 12, characterized in that, The zoom lens satisfies the following relationship: TTLt / ft < 1.0; Where TTLt is the total optical length of the zoom lens in the telephoto end state, and ft is the focal length of the zoom lens in the telephoto end state.

14. The zoom lens according to any one of claims 11 to 13, characterized in that, The object side of the first lens (11) is convex, and the image side of the fourth lens (14) is convex.

15. The zoom lens according to any one of claims 11 to 14, characterized in that, The zoom lens satisfies the following relationship: FNOt<5; Wherein, FNOt is the aperture value of the zoom lens in the telephoto end state.

16. The zoom lens according to any one of claims 11 to 15, characterized in that, The zoom lens satisfies the following relationship: TTLt / Imgh < 5.5; Where Imgh is half the diagonal length of the pixel region of the electronic photosensitive element (50) on the focusing plane.

17. The zoom lens according to any one of claims 11 to 16, characterized in that, The zoom lens satisfies the following relationship: TT 1-n / TTLt<0.4; Among them, TT 1-n It is the sum of the thicknesses of all lenses in the first lens group (10) and the second lens group (20) along the optical axis.

18. The zoom lens according to any one of claims 11 to 17, characterized in that, The zoom lens satisfies the following relationship: 0.6<f G1 / f1<1.2; Where f1 is the focal length of the first lens (11).

19. The zoom lens according to any one of claims 11 to 18, characterized in that, The zoom lens satisfies the following relationship: 0.6<f G1 / f4<1.2; Where f4 is the focal length of the fourth lens (14).

20. The zoom lens according to any one of claims 11 to 19, characterized in that, The second lens group (20) includes: a fifth lens (25) with optical power, a sixth lens (26) with optical power, a seventh lens (27) with negative optical power, and an eighth lens (28) with optical power, arranged sequentially from the object side to the image side.

21. A lens module, characterized in that, The zoom lens includes a reflector (60), an electronic photosensitive element (50), and a zoom lens as claimed in any one of claims 11 to 20, wherein the reflector (60) is located on the object side of the zoom lens for deflecting light onto the zoom lens, and the electronic photosensitive element (50) is located on the image side of the zoom lens for imaging light onto the electronic photosensitive element (50).

22. An electronic device, characterized in that, The system includes a processor and a lens module as described in claim 21, wherein the lens module is used to acquire image data and input the image data into the processor, and the processor is used to process the image data.

Images