Zoom lens, lens module and electronic device

Abstract

The application discloses a zoom lens, a lens module and an electronic device, comprising: a first lens group with positive refractive power and a second lens group with negative refractive power arranged in sequence from an object side to an image side; when the zoom lens zooms from a short-focus end state to a long-focus end state, the first lens group and the second lens group move to the object side along the optical axis, and the distance between the first lens group and the second lens group gradually decreases; the first lens group comprises: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power and a fourth lens with positive refractive power arranged in sequence from the object side to the image side. The zoom lens provided by the application realizes continuous zooming through a single lens, can keep the imaging clarity of the zoom lens always at a better level, and the layout of the single lens is also convenient for the structural optimization of the electronic device, and can better meet the design requirement of miniaturization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of zoom lenses, and more particularly, to a zoom lens, a lens module and an electronic device. BACKGROUND

[0002] In recent years, electronic devices (such as digital cameras, smart phones, notebook computers, tablet computers, etc.) equipped with camera lenses are rapidly developing and popularizing, and electronic devices have also put forward new requirements for the performance of camera lenses.

[0003] At present, the high zoom ratio of the camera lens of the electronic device on the market is basically "jumping" zoom, that is, by mounting two or more camera lenses with different focal lengths, and combining with algorithm-based digital zoom, hybrid optical zoom is realized.

[0004] However, "jumping" zoom is based on multiple camera lenses with different focal lengths, and relies on algorithm processing to realize continuous zoom, which is not a true sense of continuous zoom. In the zooming process, the imaging clarity of the focal length transition part of the multiple camera lenses is lower than that of continuous optical zoom, which affects the imaging quality. At the same time, the mounting of multiple camera lenses not only leads to complex manufacturing process, but also cannot be well adapted to handheld mobile electronic devices with strong miniaturization requirements.

[0005] In summary, how to reduce the number of camera lenses while having a large zoom ratio and good imaging quality has become one of the problems to be solved in the industry. SUMMARY

[0006] The present application provides a zoom lens, which can realize a large zoom ratio and good imaging quality through a single lens. In addition, the present application also provides a lens module applying the zoom lens, and an electronic device applying the lens module.

[0007] In a first aspect, a zoom lens is provided, comprising:

[0008] a first lens group with positive refractive power and a second lens group with negative refractive power are sequentially arranged from the object side to the image side;

[0009] When the zoom lens zooms from a short focal length end state to a long focal length 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 gradually decreases;

[0010] The first lens group comprises, from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, and a fourth lens with positive refractive power. The refractive powers of the first lens, the second lens, the third lens, and the fourth lens are reasonably distributed, so that the first lens group has positive refractive power.

[0011] The zoom lens provided in the application mainly uses the refraction principle of lenses to form images. After passing through the zoom lens, light is deflected to form a clear image on the focusing plane, and the image of the scene is recorded by the electronic photosensitive element located on the focusing plane. The zoom lens comprises a first lens group and a second lens group arranged in sequence from the object side to the image side. The first lens group is a focusing lens group with positive refractive power, which can converge light 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 of the zoom lens, so that the zoom lens can realize continuous zooming. The second lens group is a compensation lens group with negative refractive power, which can also move along the optical axis of the zoom lens to balance and eliminate the aberration generated in the movement of the first lens group, so that the focal point of the zoom lens falls on the focusing plane of the electronic photosensitive element. While meeting the large zoom ratio of the zoom lens, the imaging quality can be guaranteed.

[0012] The zoom lens provided in the application realizes continuous zooming through a single lens. Compared with the "jumping" zoom lens in the prior art, there is no focal length transition part of multiple lenses, so the imaging quality problem of the focal length transition part is eliminated, and therefore the imaging clarity of the zoom lens can always be maintained at a relatively high level. At the same time, the layout of the single lens is also conducive to the structural optimization of electronic devices, and can better meet the design requirements of miniaturization.

[0013] Optionally, the first lens group and the second lens group are assembled by a lens barrel.

[0014] Optionally, the first lens group and the second lens group are driven by a motor. Specifically, the first lens group is installed on a first motor, and the first motor is used to drive the first lens group to move along the optical axis. The second lens group is installed on a second motor, and the second motor is used to drive the second lens group to move along the optical axis.

[0015] Optionally, the total number of lenses included in the first lens group and the second lens group is 7-12. For example, the first lens group is composed of 4 lenses, and the second lens group is composed of 3 lenses, so the total number is 7. The first lens group is composed of 4 lenses, and the second lens group is composed of 7 lenses, so the total number is 11.

[0016] Optionally, the zoom lens further comprises an aperture stop, which can be arranged on the object side of the first lens in the first lens group, or the aperture stop can be arranged on any lens in the first lens group.

[0017] Optionally, the zoom lens further comprises an infrared cut-off filter, which is arranged on the image side of the fourth lens in the second lens group.

[0018] Optionally, the lenses in the first lens group and the second lens group can be made of plastic or glass.

[0019] Optionally, the lenses in the first lens group and the second lens group can also be made of 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 a resin matrix.

[0020] In one possible design, the zoom lens satisfies the following relationship:

[0021] 0.5 < f G1 / fw < 0.8.

[0022] wherein f G1 is the focal length of the first lens group, and fw is the focal length of the zoom lens in the short-focus end state.

[0023] The above relationship specifies the range of the ratio of the focal length of the first lens group to the focal length of the zoom lens in the short-focus end state, which is less than 0.8, so as to limit the axial length of the first lens group and facilitate the compression of the total optical length of the zoom lens to realize the miniaturization of the module structure; and the ratio is greater than 0.5, so as to facilitate the zoom lens to maintain good imaging quality. Thus, the above limiting conditions are combined to make the size of the zoom lens smaller under the premise of ensuring the imaging quality of the zoom lens, and thus the zoom lens can be better adapted to small handheld mobile electronic devices.

[0024] In one possible design, the zoom lens satisfies the following relationship:

[0025] TTLt / ft < 1.0;

[0026] wherein TTLt is the total optical length of the zoom lens in the long-focus end state, and ft is the focal length of the zoom lens in the long-focus end state.

[0027] The above relationship specifies the range of the ratio of the focal length of the first lens group to the focal length of the zoom lens in the short-focus end state, so as to limit the total optical length of the zoom lens while satisfying the long-focus characteristic, to realize the miniaturization of the module, and facilitate the equal scaling under the condition of the same architecture of the zoom lens.

[0028] 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.

[0029] The above definition further defines the surface structure of the object side surface of the first lens in the first lens group and the image side surface of the fourth lens, wherein the object side surface of the first lens in the first lens group is a convex surface, which is beneficial to reduce the spherical aberration, and the image side surface of the fourth lens in the first lens group is a convex surface, which can effectively reduce the spherical aberration and distortion, thereby improving the imaging quality of the zoom lens; meanwhile, such design can also improve the ability of the first lens group to converge light, and can prolong the back focal length of the zoom lens, so that the zoom lens has good imaging effect while minimizing the total optical length of the zoom lens, thereby achieving the purpose of miniaturization.

[0030] In a possible design, the zoom lens satisfies the following relationship:

[0031] FNOt<5;

[0032] Wherein, FNOt is the aperture value of the zoom lens in the long focal end state.

[0033] The above relationship defines the aperture value range of the zoom lens in the long focal end state, which can make the zoom lens beneficial to display high resolution in the short focal end, and at the same time make the lens have large light flux and improve the imaging performance, so that clear imaging effect can be achieved even in a darker environment.

[0034] In a possible design, the zoom lens satisfies the following relationship:

[0035] ft / fw<1.6.

[0036] The above relationship defines the range of the ratio of the focal length of the zoom lens in the long focal end state to the focal length of the zoom lens in the short focal end, i.e. the zoom ratio is less than 1.6. Under the requirement of the zoom ratio, the optical structure of the zoom lens in the present application is relatively simple, and continuous zoom can be easily realized by two lens groups, thereby being beneficial to realize module miniaturization while taking into account good imaging quality.

[0037] In a possible design, the zoom lens satisfies the following relationship:

[0038] TTLt / Imgh<5.5;

[0039] Wherein, Imgh is half of the diagonal length of the pixel area of the electronic photosensitive element on the focusing plane.

[0040] The above relationship defines the range of the ratio of the total optical length of the zoom lens in the long focal end state to half of the diagonal length of the pixel area of the electronic photosensitive element on the focusing plane. When ensuring that the zoom lens has a high-pixel image, the total optical length of the zoom lens is limited, which is beneficial to better reduce the overall size to realize miniaturization while taking into account good imaging quality.

[0041] In a possible design, the zoom lens satisfies the following relationship:

[0042] TT 1-n TTLt<0.4;

[0043] wherein, TT 1-n is the sum of thicknesses of all lenses in the first lens group and the second lens group on the optical axis.

[0044] The above relationship limits the thicknesses of all lenses in the first lens group and the second lens group, is beneficial to the machining of the zoom lens, and is beneficial to achieving a large zoom ratio and a better zoom effect. The range of the ratio can better balance the zoom performance and the processability.

[0045] In a possible design, the zoom lens satisfies the following relationship:

[0046] 0.6<f G1 / f1<1.2;

[0047] wherein, f1 is the focal length of the first lens.

[0048] The above relationship limits the thicknesses of all lenses in the first lens group and the second lens group, is beneficial to the machining of the zoom lens, and is beneficial to achieving a large zoom ratio and a better zoom effect. The range of the ratio can better balance the zoom performance and the processability.

[0049] In a possible design, the zoom lens satisfies the following relationship:

[0050] 0.6<f G1 / f4<1.2;

[0051] wherein, f4 is the focal length of the fourth lens.

[0052] The above relationship limits the thicknesses of all lenses in the first lens group and the second lens group, is beneficial to the machining of the zoom lens, and is beneficial to achieving a large zoom ratio and a better zoom effect. The range of the ratio can better balance the zoom performance and the processability.

[0053] In a possible design, the second lens set comprises, in order from the object side to the image side, 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. The optical powers of the fifth lens, the sixth lens, the seventh lens, and the eighth lens are reasonably distributed, so that the second lens set has negative optical power.

[0054] Alternatively, the optical powers of the fifth lens, the sixth lens, the seventh lens, and the eighth lens can also be distributed in other manners, which are not limited in the present application.

[0055] In a second aspect, the present application further provides a lens module, comprising a reflecting element, an electronic photosensitive element, and the zoom lens described above, the reflecting element is located on the object side of the zoom lens and used to deflect light to the zoom lens, and the electronic photosensitive element is located on the image side of the zoom lens, and the zoom lens is used to image light to the electronic photosensitive element.

[0056] Alternatively, the reflecting element is a prism or a mirror.

[0057] Alternatively, the reflecting surface of the mirror can be a metal reflecting film layer prepared by evaporation or sputtering, and the metal can be nickel, aluminum, silver, gold, or an alloy thereof.

[0058] The reflecting element can change the propagation direction of light, so that the optical axis direction of the zoom lens can be different from the direction in which external light enters 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 of the electronic device, thereby reducing the size requirement of the accommodation space in the thickness direction of the electronic device.

[0059] In addition, since the lens module adopts the zoom lens described above, the lens module also has the advantages of large zoom ratio, excellent imaging quality, miniaturization, easy processing and manufacturing, high yield, and the like corresponding to the zoom lens.

[0060] In a third aspect, the present application further provides an electronic device, comprising a processor and the lens module described above, 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.

[0061] Alternatively, the electronic device further comprises a housing and a display screen, the display screen is mounted on the housing, the housing has an accommodation space formed therein, the lens module can be mounted in the accommodation space, and the display screen is electrically connected to the processor and can display pictures or videos processed by the processor.

[0062] 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.

[0063] 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.

[0064] 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

[0065] Figure 1 This is a schematic diagram of an example of a zoom lens provided in an embodiment of this application;

[0066] Figure 2 yes Figure 1 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment;

[0067] Figure 3 yes Figure 1 A schematic diagram of the distortion curve of the zoom lens in the embodiment;

[0068] Figure 4 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application;

[0069] Figure 5 yes Figure 4 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment;

[0070] Figure 6 yes Figure 4 A schematic diagram of the distortion curve of the zoom lens in the embodiment;

[0071] Figure 7 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application;

[0072] Figure 8 yes Figure 7 A schematic diagram of the astigmatism curve of the zoom lens in the embodiment;

[0073] Figure 9 yes Figure 7 A schematic diagram of the distortion curve of the zoom lens in the embodiment;

[0074] Figure 10 This is a schematic diagram of yet another example of a zoom lens provided in the embodiments of this application;

[0075] Figure 11 yesFigure 10 A schematic diagram of the astigmatic field curve of the zoom lens in the embodiment;

[0076] Figure 12 is Figure 10 A schematic diagram of the distortion curve of the zoom lens in the embodiment;

[0077] Figure 13 is a schematic diagram of another example of the zoom lens provided by the embodiment of the application;

[0078] Figure 14 is Figure 13 A schematic diagram of the astigmatic field curve of the zoom lens in the embodiment;

[0079] Figure 15 is Figure 13 A schematic diagram of the distortion curve of the zoom lens in the embodiment;

[0080] Figure 16 is a schematic diagram of another example of the zoom lens provided by the embodiment of the application;

[0081] Figure 17 is Figure 16 A schematic diagram of the astigmatic field curve of the zoom lens in the embodiment;

[0082] Figure 18 is Figure 16 A schematic diagram of the distortion curve of the zoom lens in the embodiment;

[0083] Figure 19 is a schematic diagram of an example of the lens module provided by the embodiment of the application;

[0084] Figure 20 is a schematic diagram of another example of the lens module provided by the embodiment of the application;

[0085] Figure 21 is a schematic diagram of the electronic device provided by the embodiment of the application.

[0086] Reference signs: 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, reflecting element; 100, lens module; 200, housing; 300, display screen. DETAILED DESCRIPTION

[0087] The following exemplary describes the related content that may be involved in the embodiment of the application.

[0088] For the convenience of understanding, the following first explains and describes the technical terms involved in the application.

[0089] Focal length, also called focal length, is a measure of the convergence or divergence of light in an optical system, which refers to the vertical distance from the optical center of the lens or lens group to the focal plane when the infinite scene passes through the lens or lens group to form a clear image. From a practical point of view, it can be understood as the distance from the lens center to the film plane. For a fixed focus lens, the position of the optical center is fixed; for a zoom lens, the change of the optical center of the lens brings the change of the focal length of the lens.

[0090] Aperture is a device used to control the amount of light that enters the lens into the body of the light-sensitive surface, which is usually in the lens. The size of the aperture is expressed by F / number.

[0091] Aperture value is a relative value (reciprocal of relative aperture) derived from the focal length of the lens / diameter of the lens. The smaller the aperture value, the more light will enter in the same unit of time. The larger the aperture value, the smaller the depth of field, and the background content of the photograph will be blurred, similar to the effect of a long focal length lens.

[0092] Focal power: equal to the difference between the convergence degree of the image beam and the convergence degree of the object beam, which represents the ability of the optical system to deflect light. Focal power is often represented by the letter , and the refractive power of the spherical surface is , where n' is the refractive index of the image, n is the refractive index of the object, r is the spherical radius, f' is the image focal length, and f is the object focal length. Generally, the focal power is represented by the reciprocal of the image focal length (approximately recognized as the refractive index of air is 1). The above focal power equation is universal for any optical system (no off-axis).

[0093] Focal power represents the refractive power of the optical system to the incident parallel light beam. The larger the value of , the more the parallel light beam is deflected; , the refractive is convergent; , the refractive is divergent.

[0094] Total track length (TTL), which refers to the total length from the lens barrel head to the imaging surface, is the main factor in determining the height of the camera.

[0095] Abbe number, i.e. dispersion coefficient, is the difference ratio of the refractive index of optical materials at different wavelengths, which represents the degree of material dispersion.

[0096] Field of view (FOV), in optical instruments, the angle between the two edges of the maximum range of the object image of the measured target that can pass through the lens of the optical instrument, is called the field of view. The size of the field of view determines the field of view of the optical instrument. The larger the field of view, the larger the field of view, and the smaller the optical magnification.

[0097] Optical axis, a light ray perpendicular to the center of an ideal lens. When the light rays parallel to the optical axis enter the convex lens, the ideal convex lens should converge all the light rays to a point behind the lens. This point where all the light rays converge is called the focal point.

[0098] Diaphragm, refers to the edge, frame or specially designed aperture barrier of the optical element in the optical assembly used to limit the size of the imaging light beam or the unit of the imaging space.

[0099] Aperture diaphragm, the diaphragm that limits the maximum inclination of the edge light of the on-axis point imaging light beam, that is, the diaphragm with the minimum incident aperture angle.

[0100] Entrance pupil, the common entrance of the light beams emitted by all points on the object plane.

[0101] Entrance pupil diameter, the effective aperture that limits the incident light beam.

[0102] Aberration, the deviation of the actual optical system from the ideal condition of Gaussian optics (first-order approximation theory or near-axis light) due to the difference between the results obtained by tracing non-near-axis light and the results obtained by tracing near-axis light. Aberration is mainly divided into spherical aberration, coma, field curvature, astigmatism, distortion, chromatic aberration and wave aberration.

[0103] Distortion, also known as distortion, the distortion degree of the image formed by the optical system relative to the object itself. Distortion is caused by the influence of the diaphragm spherical aberration. The intersection height of the chief ray of different fields of view after passing through the optical system is not equal to the ideal image height, and the difference between the two is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal surface, which causes the distortion of the image shape, but does not affect the sharpness of the image.

[0104] Zoom ratio, the ratio of the longest focal length to the shortest focal length of the zoom lens.

[0105] Long focal end of zoom lens, indicates the numerical value segment of the focal length when the zoom lens is in the telephoto state.

[0106] Short focal end of zoom lens, indicates the numerical value segment of the focal length when the zoom lens is in the wide-angle state, and the captured image presents a large foreground and a small distance.

[0107] The focusing group refers to a lens group that moves along the optical axis of the zoom lens and is responsible for adjusting the focal length of the zoom lens.

[0108] The compensation group refers to a lens group that moves along the optical axis of the zoom lens together with the focusing group and is responsible for balancing and eliminating the impact of aberration generated by the focusing group during movement.

[0109] The zoom lens is a camera lens that can change the focal length within a certain range to obtain different field angles, different image sizes, and different scene ranges. The zoom lens can change the shooting range by changing the focal length without changing the shooting distance, which is very beneficial for picture composition. Since a zoom lens can perform the functions of several fixed focus lenses, it can be used in various shooting scenes, reducing the number of lenses to be carried and saving time for lens replacement.

[0110] The zoom lens is a camera lens that can change the focal length within a certain range to obtain different field angles, different image sizes, and different scene ranges. The zoom lens can change the shooting range by changing the focal length without changing the shooting distance, which is very beneficial for picture composition. Since a zoom lens can perform the functions of several fixed focus lenses, it can be used in various shooting scenes, reducing the number of lenses to be carried and saving time for lens replacement.

[0111] Based on the above problems, the present application provides a zoom lens, which can achieve large zoom ratio and good imaging quality through a single lens, reduce the number of camera lenses, and be well adapted to small handheld mobile electronic devices.

[0112] For convenience of description, the left side of the zoom lens is defined as the scene side (hereinafter also referred to as the object side), the surface of the lens facing the object side can be referred to as the object side surface, and the object side surface can also be understood as the surface of the lens close to the object side. The right side of the zoom lens is the image side (hereinafter also referred to as the image side), the surface of the lens facing the image side can be referred to as the image side surface, and the image side surface can also be understood as the surface of the lens close to the image side.

[0113] Figure 1 is a schematic diagram of an example of the zoom lens provided by the embodiments of the present application. Among them, Figure 1 (a) of the zoom lens at the short focus end is shown in the schematic diagram; Figure 1 (b) of the zoom lens at the long focus end is shown in the schematic diagram.

[0114] As Figure 1 shown, the zoom lens of the embodiments of the present application comprises a first lens group 10 with positive optical power and a second lens group 20 with negative optical power arranged in sequence from the object side to the image side.

[0115] When the zoom lens zooms from the short focal length end state to the long focal length end state, i.e. Figure 1 In the state transformation process from (a) to (b) in the middle, the first lens group 10 and the second lens group 20 move to the object side along the optical axis, and the distance between the first lens group 10 and the second lens group 20 gradually decreases.

[0116] The first lens group 10 has four lenses, each lens has a certain optical power, and the optical power of the multiple lenses is reasonably distributed, so that the first lens group 10 has positive optical power and the ability to converge light rays; specifically, the first lens group 10 includes, from the object side to the image side, 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.

[0117] The second lens group 20 is also composed of multiple lenses with certain optical power, and the optical power of the multiple lenses is reasonably distributed, so that the second lens group 20 has negative optical power and the ability to diverge light rays.

[0118] The zoom lens provided by the embodiment of the present application mainly uses the refraction principle of the lens to image, the light rays are deflected after passing through the zoom lens, and a clear image is formed on the focusing plane, and the image of the scene is recorded by the electronic photosensitive element 50 located on the focusing plane. The zoom lens includes a first lens group 10 and a second lens group 20 arranged in order from the object side to the image side, wherein the first lens group 10 is a focusing lens group with positive optical power, which can converge light rays to compress the beam aperture entering the zoom lens, and the first lens group 10 can move along the optical axis of the zoom lens to change the focal length of the zoom lens, so that the zoom lens can realize continuous zooming; 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 generated by the movement of the first lens group 10, so that the focal point of the zoom lens falls on the focusing plane of the electronic photosensitive element 50, and at the same time meeting the large zoom ratio of the zoom lens, the imaging quality can be guaranteed.

[0119] The zoom lens provided by the embodiment of the present application realizes continuous zooming through a single lens, compared with the "jumping" zoom lens in the prior art, there is no focal length transition part of multiple lenses, so the imaging quality problem of the focal length transition part is eliminated, so the imaging clarity of the zoom lens can always be maintained at a good level; at the same time, the layout of the single lens is also convenient for the structural optimization of the electronic device, and the design requirement of miniaturization can be better met.

[0120] Optionally, the first lens group 10 and the second lens group 20 are assembled by a lens barrel.

[0121] Optionally, the first lens group 10 and the second lens group 20 are driven by motors. Specifically, the first lens group 10 is mounted on a first motor for driving the first lens group 10 to move along the optical axis; the second lens group 20 is mounted on a second motor for driving the second lens group 20 to move along the optical axis.

[0122] Optionally, the total number of lenses included in the first lens group 10 and the second lens group 20 is 7-12 pieces.

[0123] In some embodiments, the first lens group 10 is composed of 4 lenses, and the second lens group 20 is composed of 3 lenses, wherein the 3 lenses constituting the second lens group 20 respectively have positive focal power, negative focal power and negative focal power, and the focal powers of the 3 lenses are reasonably distributed, so that the second lens group 20 as a whole has negative focal power.

[0124] In some embodiments, the first lens group 10 is composed of 4 lenses, and the second lens group 20 is composed of 6 lenses, wherein the 6 lenses constituting the second lens group 20 respectively have positive focal power, positive focal power, negative focal power, positive focal power, negative focal power and negative focal power, and the focal powers of the 6 lenses are reasonably distributed, so that the second lens group 20 as a whole has negative focal power.

[0125] In some embodiments, the first lens group 10 is composed of 4 lenses, and the second lens group 20 is composed of 8 lenses, wherein the 8 lenses constituting the second lens group 20 respectively have positive focal power, negative focal power, positive focal power, negative focal power, negative focal power, negative focal power, negative focal power and positive focal power, and the focal powers of the 8 lenses are reasonably distributed, so that the second lens group 20 as a whole has negative focal power.

[0126] In some embodiments, the first lens group 10 and the second lens group 20 respectively include 4 lenses, and the total number is 8 pieces. In the second lens group 20, the 4 lenses are defined as the fifth lens 25, the sixth lens 26, the seventh lens 27 and the eighth lens 28 arranged in order from the object side to the image side.

[0127] Wherein, as described above, each lens of the second lens group 20 also has a certain focal power, and the focal powers of the multiple lenses are reasonably distributed, so that the second lens group 20 has negative focal power. Specifically, the fifth lens 25 has a focal power, the sixth lens 26 has a focal power, the seventh lens 27 has a negative focal power, and the fourth lens 14 has a focal power, so as to form the second lens group 20 with negative focal power.

[0128] Optionally, the zoom lens further comprises an aperture stop 30, which can be arranged on the object side of the first lens group 10 or on any lens in the first lens group 10. The effective light passage of the aperture stop 30 can be circular, the face of the effective light passage can be perpendicular to the optical axis, and the center of the effective light passage can be on the optical axis. The aperture stop 30 can be made of any of the following materials: plastic, aluminum alloy, beryllium aluminum alloy, titanium alloy, aluminum, beryllium, etc.

[0129] The aperture stop 30 ensures the paraxial condition, improves the imaging quality, improves the definition of the imaging, controls the range of the imaging 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, and in the case of a certain focal length of the lens, a smaller aperture value can be obtained, i.e. a larger aperture and a diffraction limit value can be obtained, thereby improving the imaging quality of the zoom lens.

[0130] Optionally, the zoom lens further comprises an infrared cut-off filter 40, which is arranged on the image side of the eighth lens 28.

[0131] The infrared cut-off filter 40 can effectively block the infrared light that interferes with the imaging quality and maintain high transmittance of visible light, so that the formed image is more in line with the best feeling of the human eye.

[0132] For the convenience of understanding and description, the representation form of the related parameters of the zoom lens is defined in the embodiments of the application, for example, f represents the focal length of the zoom lens, f G1 The similar defined letters are only illustrative, and other forms can also be used, which are not limited in the application.

[0133] It should be further pointed out that the units of the parameters related to the ratio in the following relationship are consistent, for example, the units of the numerator are millimeters (mm), and the units of the denominator are also millimeters.

[0134] In addition, the zoom lens satisfies the following relationship:

[0135] 0.5 < f G1 / fw < 0.8.

[0136] Wherein, f G1 is the focal length of the first lens group 10, and fw is the focal length of the zoom lens in the short focus state.

[0137] It should be understood that the above-mentioned zoom lens refers to the combination of the first lens group 10 and the second lens group 20. In addition, f G1 is the focal length of the first lens group 10, i.e. the combined focal length of the first lens 11 to the fourth lens 14 in the first lens group 10.

[0138] The above relationship defines the range of the ratio of the focal length of the first lens group 10 to the focal length of the zoom lens in the short-focus end state 0.5 < f / w < 0.8 G1 The ratio range satisfying less than 0.8 can limit the axial space length of the first lens group 10, which is beneficial to compress the total optical length of the zoom lens to realize the miniaturization of the module structure. The ratio range satisfying greater than 0.5 can make the zoom lens beneficial to maintain better imaging quality. Thus, the above limiting conditions are combined to make the size of the zoom lens smaller under the premise of ensuring the imaging quality of the zoom lens, and thus the zoom lens can be better adapted to the miniaturized handheld mobile electronic device.

[0139] Optionally, the lenses in the first lens group 10 can be plastic or glass.

[0140] Optionally, the lenses in the first lens group 10 can also be other materials that can meet the refractive index requirements, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into a resin matrix.

[0141] Optionally, the lenses in the second lens group 20 can be plastic or glass.

[0142] Optionally, the lenses in the second lens group 20 can also be other materials that can meet the refractive index requirements, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into a resin matrix.

[0143] In some embodiments, the zoom lens satisfies the following relationship:

[0144] TTLt / ft < 1.0.

[0145] Wherein, TTLt is the total optical length of the zoom lens in the long-focus end state, and ft is the focal length of the zoom lens in the long-focus end state.

[0146] The above relationship defines the range of the ratio of the total optical length of the zoom lens in the long-focus end state to the focal length of the zoom lens in the long-focus end state TTLt / ft < 1.0, which makes the zoom lens meet the long-focus characteristics while limiting the total optical length of the zoom lens to realize the miniaturization of the module, and is beneficial to the equal scaling under the condition of the same architecture of the zoom lens.

[0147] Optionally, the object side of the first lens 11 in the first lens group 10 is convex, and the image side of the fourth lens 14 is convex.

[0148] The above definition further defines the surface shape 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 is beneficial to reduce the spherical aberration. The image side surface of the fourth lens 14 in the first lens group 10 is convex, which can effectively reduce the spherical aberration and distortion, thereby improving the imaging quality of the zoom lens. In addition, such design can also improve the ability of the first lens group 10 to converge light, prolong the back focal length of the zoom lens, and reduce the total optical length of the zoom lens while maintaining good imaging effect, thereby achieving the purpose of miniaturization.

[0149] In some embodiments, the zoom lens satisfies the following relationship:

[0150] FNOt<5.

[0151] Wherein, FNOt is the aperture value of the zoom lens in the long-focus end state.

[0152] The above relationship defines the aperture value range of the zoom lens in the long-focus end state FNOt<5, which can help the zoom lens to display high resolution in the short-focus end, and at the same time, the lens has large light flux, which improves the imaging performance, and even in a dark environment, it can also achieve clear imaging effect.

[0153] In some embodiments, the zoom lens satisfies the following relationship:

[0154] ft / fw<1.6.

[0155] ft is the focal length of the zoom lens in the long-focus end state, and fw is the focal length of the zoom lens in the short-focus end state.

[0156] The above relationship defines the ratio range of the focal length of the zoom lens in the long-focus end state to the focal length of the zoom lens in the short-focus end state ft / fw<1.6, i.e. the zoom ratio is less than 1.6. Under the requirement of the zoom ratio, the optical structure of the zoom lens in the present application is relatively simple, and continuous zoom can be easily realized by two lens groups, thereby facilitating the realization of module miniaturization while ensuring good imaging quality.

[0157] In some embodiments, the zoom lens satisfies the following relationship:

[0158] TTLt / Imgh<5.5.

[0159] Wherein, TTLt is the total optical length of the zoom lens in the long-focus end state, and Imgh is half of the diagonal line length of the pixel area of the electronic photosensitive element 50 on the focusing plane.

[0160] The above relationship defines the range of the ratio of the total optical length of the zoom lens in the long-focus end state to half the diagonal length of the pixel area of the electronic photosensitive element 50 on the focusing plane TTLt / Imgh<5.5. The total optical length of the zoom lens is limited to ensure that the zoom lens has a high-pixel image, which is conducive to reducing the overall size to achieve miniaturization while ensuring good imaging quality.

[0161] In some embodiments, the zoom lens satisfies the following relationship:

[0162] TT 1-n / TTLt<0.4.

[0163] TT 1-n is the sum of the thicknesses of all lenses in the first lens group 10 and the second lens group 20 on the optical axis, and TTLt is the total optical length of the zoom lens in the long-focus end state.

[0164] For example, the first lens group 10 and the second lens group 20 each include 4 lenses, and TT 1-n 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 on the optical axis.

[0165] It should be noted that TT 1-n does not include the gap between adjacent two lenses.

[0166] The above relationship defines the range of the ratio of the sum of the thicknesses of all lenses in the first lens group 10 and the second lens group 20 on the optical axis to the total optical length of the zoom lens in the long-focus end state TT 1-n / TTLt<0.4, which limits the thicknesses of all lenses in the first lens group 10 and the second lens group 20, is conducive to the processing and manufacturing of the zoom lens, and is conducive to achieving a large zoom ratio and good zoom effect. This range of the ratio can better balance the zoom performance and the processability.

[0167] In some embodiments, the zoom lens satisfies the following relationship:

[0168] 0.6<f G1 / f1<1.2.

[0169] TT G1 is the focal length of the first lens group 10, and f1 is the focal length of the first lens 11.

[0170] The above relationship defines the range of the ratio of the focal length of the first lens group 10 to the focal length of the first lens 11 in the first lens group 10 0.6<f G1f1<1.2, when the ratio range is satisfied, it is beneficial to rationally distribute the optical power of the lens, avoid the local concentration of the optical power in the lens group to cause the tolerance sensitivity, thereby reducing the processing and manufacturing difficulty, and is beneficial to improve the yield.

[0171] In some embodiments, the zoom lens satisfies the following relationship:

[0172] 0.6 G1 f4<1.2.

[0173] Wherein, f G1 is the focal length of the first lens group 10, and f4 is the focal length of the fourth lens 14.

[0174] The above relationship formula defines the focal length of the first lens group 10 and the focal length of the fourth lens 14 in the first lens group 10. The ratio range 0.6 G1 f4<1.2, when the ratio range is satisfied, it is beneficial to rationally distribute the optical power of the lens, avoid the local concentration of the optical power in the lens group to cause the tolerance sensitivity, thereby reducing the processing and manufacturing difficulty, and is beneficial to improve the yield.

[0175] Optionally, the first lens 11 can be plastic or glass material, and can also be other materials that can meet the performance requirements of the first lens 11, such as: composite materials that fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into the resin matrix. The first lens 11 has positive optical power. The object side of the first lens 11 is convex near the optical axis, and the image side of the first lens 11 is concave near the optical axis. The object side of the first lens 11 is convex near the periphery, and the image side of the first lens 11 is concave near the periphery.

[0176] Optionally, the second lens 12 can be plastic or glass material, and can also be other materials that can meet the performance requirements of the second lens 12, such as: composite materials that fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into the resin matrix. The second lens 12 has negative optical power. The object side of the second lens 12 can be convex or concave near the optical axis, and the image side of the second lens 12 is concave near the optical axis. The object side of the second lens 12 can be convex or concave near the periphery, and the image side of the second lens 12 is concave near the periphery.

[0177] Optionally, the third lens 13 can be made of plastic or glass, or other materials that can meet the performance requirements of the third lens 13, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into a resin matrix. The third lens 13 can have positive or negative focal power. The object side of the third lens 13 can be convex near the optical axis, or concave, and the image side of the third lens 13 is concave near the optical axis. The object side of the third lens 13 can be convex near the periphery, or concave, and the image side of the third lens 13 is concave near the periphery.

[0178] Optionally, the fourth lens 14 can be made of plastic or glass, or other materials that can meet the performance requirements of the fourth lens 14, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into a resin matrix. The fourth lens 14 has negative focal power. The object side of the fourth lens 14 is convex near the optical axis, and the image side of the fourth lens 14 is convex near the optical axis. The object side of the fourth lens 14 is convex near the periphery, and the image side of the fourth lens 14 is convex near the periphery.

[0179] Optionally, the fifth lens 25 can be made of plastic or glass, or other materials that can meet the performance requirements of the fifth lens 25, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into a resin matrix. The fifth lens 25 has positive or negative focal power. The object side of the fifth lens 25 is concave near the optical axis, and the image side of the fifth lens 25 can be convex or concave near the optical axis. The object side of the fifth lens 25 can be convex or concave near the periphery, and the image side of the fifth lens 25 can be convex or concave near the periphery.

[0180] Optionally, the sixth lens 26 can be made of plastic or glass, or other materials that can meet the performance requirements of the sixth lens 26, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, etc. are mixed into a resin matrix. The sixth lens 26 has positive or negative focal power. The object side of the sixth lens 26 is concave near the optical axis, and the image side of the sixth lens 26 can be convex or concave near the optical axis. The object side of the sixth lens 26 can be convex or concave near the periphery, and the image side of the sixth lens 26 can be convex or concave near the periphery.

[0181] Optionally, the seventh lens 27 can be made of plastic or glass, or other materials that can meet the performance requirements of the seventh lens 27, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, or the like are mixed into a resin matrix. The seventh lens 27 has a negative refractive power. The object side of the seventh lens 27 can be convex near the optical axis or concave, and the image side of the seventh lens 27 can be convex near the optical axis or concave. The object side of the seventh lens 27 can be convex near the periphery or concave, and the image side of the seventh lens 27 can be convex near the periphery or concave.

[0182] Optionally, the eighth lens 28 can be made of plastic or glass, or other materials that can meet the performance requirements of the eighth lens 28, such as a composite material in which fine particles of inorganic metal oxides, inorganic metal sulfides, or the like are mixed into a resin matrix. The eighth lens 28 has a positive refractive power, or can have a negative refractive power. The object side of the eighth lens 28 can be convex near the optical axis or concave, and the image side of the eighth lens 28 can be convex near the optical axis or concave. The object side of the eighth lens 28 can be convex near the periphery or concave, and the image side of the eighth lens 28 can be convex near the periphery or concave.

[0183] 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 all be made of plastic, thereby controlling the weight of the zoom lens and reducing the difficulty of motor design and manufacturing in the lens module 100. In addition, according to the process characteristics of injection molding, plastic materials can realize high-precision spherical, aspherical, and free-form surfaces, and can meet the surface type requirements of each lens in the first lens group 10 and the second lens group 20.

[0184] 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 be designed with a combination of glass and plastic materials. The glass material has more refractive index and Abbe number selection to realize the design and optical system design of a large-aperture or super-large-aperture camera lens, and the zoom lens designed with a combination of glass and plastic materials can also have more architectural possibilities for optical design, and it is easier to obtain a small-sized zoom lens with strong aberration correction capability.

[0185] Some specific but non-limiting examples of the embodiments of the present application will be described in more detail below. Figures 1 to 21 Some specific but non-limiting examples of the embodiments of the present application will be described in more detail below.

[0186] Embodiment One

[0187] Figure 1 A schematic diagram of the zoom lens of Embodiment One is shown. In which, Figure 1 (a) of FIG. 1 shows a schematic diagram of the zoom lens of Embodiment One at the short focal end; Figure 1 (b) of FIG. 1 shows a schematic diagram of the zoom lens of Embodiment One at the long focal end.

[0188] As shown in Figure 1 the zoom lens comprises a first lens group 10 and a second lens group 20, the first lens group 10 is composed of a first lens 11 with positive refractive power, a second lens 12 with negative refractive power, a third lens 13 with positive refractive power, and a fourth lens 14 with positive refractive power, the second lens group 20 is composed of a fifth lens 25 with positive refractive power, a sixth lens 26 with negative refractive power, a seventh lens 27 with negative refractive power, and an eighth lens 28 with positive refractive power.

[0189] According to the above relationship, the design parameters of the zoom lens in Embodiment One of the present application are as shown in Table 1A.

[0190] Table 1A Design parameters of Embodiment One

[0191]

[0192] Table 1B shows the aspheric coefficients of each lens of the zoom lens in Embodiment One of the present application, as shown in Table 1B.

[0193] Table 1B Aspheric coefficients of the zoom lens of Embodiment One

[0194]

[0195]

[0196] Wherein, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients.

[0197] In Embodiment One of the present application, the aspheric surface equation of each surface can be:

[0198]

[0199] Wherein, z is the relative distance of the point on the aspheric surface with a distance of r from the optical axis to the tangent plane at the intersection point on the optical axis; r is the vertical distance of the point on the aspheric curve to the optical axis; c is the curvature; k is the conic coefficient; A4 to A20 are aspheric coefficients.

[0200] It should be understood that the aspheric surface of each lens in the zoom lens can use the aspheric surface shown in the aspheric surface equation described above, or other aspheric surface equation, which is not limited in the present application.

[0201] Table 1C shows the basic parameters of the zoom lens in the embodiment one of the present application, as shown in Table 1C.

[0202] Table 1C shows the basic parameters of the zoom lens in the embodiment one of the present application, as shown in Table 1C.

[0203] Wide end Tele end f 16.29mm 24.58mm FNO 3.00 4.55 FOV 26.96° 18.33° TTL 20.02mm 20.19mm d1 4.41mm 0mm d9 1.618mm 0.2mm d18 0.497mm 6.489mm

[0204] 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 on the optical axis between the aperture stop 30 and the object side of the first lens 11, 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.

[0205] Figure 2 Fig. 6 shows the astigmatic field curve of the light with a wavelength of 555 nm after passing through the zoom lens of the embodiment one, wherein the solid line is the focal shift in the meridional direction, and the dotted line is the focal shift in the sagittal direction. Figure 2

[0206] wherein, Figure 2 Fig. 6(a) shows the astigmatic field curve of the zoom lens at the short focal end, and Fig. 6(b) shows the astigmatic field curve of the zoom lens at the long focal end. Figure 2 It can be seen from Fig. 6(a) that the focal shift in the meridional direction is controlled within the range of 0-0.005 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.02 mm. Figure 2 Fig. 6(b) shows the astigmatic field curve of the zoom lens at the long focal end, and Fig. 6(b) shows the astigmatic field curve of the zoom lens at the long focal end. Figure 2 It can be seen from Fig. 6(b) that the focal shift in the meridional direction is controlled within the range of 0-0.005 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.02 mm. It can be seen that the astigmatism and the field curvature are strictly corrected, and the imaging quality is excellent.

[0207] Figure 3 Fig. 7 shows the distortion curve of the light with a wavelength of 555 nm after passing through the zoom lens of the embodiment one.

[0208] wherein, Figure 3 Fig. 7(a) shows the distortion curve of the zoom lens at the short focal end, and Fig. 7(b) shows the distortion curve of the zoom lens at the long focal end. Figure 3 It can be seen from Fig. 7(a) that the distortion is controlled within the range of 0-2.5%. Figure 3 Fig. 7(b) shows the distortion curve of the zoom lens at the long focal end, and Fig. 7(b) shows the distortion curve of the zoom lens at the long focal end.​Figure 3 (b) of FIG. 6B shows the schematic view of the zoom lens of Example 2 at the long focal end.

[0209] Example Two

[0210] Figure 4 FIG. 6A shows the schematic view of the zoom lens of Example 2. In FIG. 6A, Figure 4 (a) of FIG. 6B shows the schematic view of the zoom lens of Example 2 at the short focal end; Figure 4 (b) of FIG. 6B shows the schematic view of the zoom lens of Example 2 at the long focal end.

[0211] As shown in FIG. 6A, Figure 4 The zoom lens shown in FIG. 6A includes a first lens group 10 and a second lens group 20, the first lens group 10 is composed of a first lens 11 with positive refractive power, a second lens 12 with negative refractive power, a third lens 13 with positive refractive power, and a fourth lens 14 with positive refractive power, the second lens group 20 is composed of a fifth lens 25 with positive refractive power, a sixth lens 26 with negative refractive power, a seventh lens 27 with negative refractive power, and an eighth lens 28 with positive refractive power.

[0212] According to the above relationship, the design parameters of the zoom lens in Example 2 of the present application are shown in Table 2A.

[0213] Table 2A Design parameters of Example 2

[0214]

[0215]

[0216] Table 2B shows the aspheric coefficients of each lens of the zoom lens in Example 2 of the present application, as shown in Table 2B.

[0217] Table 2B Aspheric coefficients of the zoom lens of Example 2

[0218]

[0219]

[0220] Wherein, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients.

[0221] The aspheric surface of each lens in the zoom lens in Example 2 can use the aspheric surface equation in Example 1, or other aspheric formulas, which are not limited in the present application.

[0222] Table 2C shows the basic parameters of the zoom lens in Embodiment Two of the present application, as shown in Table 2C.

[0223] Table 2C shows the basic parameters of the zoom lens in Embodiment Two of the present application, as shown in Table 2C.

[0224] Wide end Tele end f 17.00mm 24.00mm FNO 3.15 4.44 FOV 26.00° 18.75° TTL 19.00mm 19.40mm d1 3.636mm -0.4mm d9 1.545mm 0.2mm d18 0.55mm 5.931mm

[0225] 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 on the optical axis between the aperture stop 30 and the object side of the first lens 11, 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.

[0226] Figure 5 Fig. 6 shows the astigmatism field curves of light with a wavelength of 555 nm after passing through the zoom lens of Embodiment Two, wherein the solid line represents the focal shift in the meridional direction, and the dotted line represents the focal shift in the sagittal direction. Figure 5

[0227] Figure 5 Fig. 6(a) shows the astigmatism field curves of the zoom lens at the short focal end, and Fig. 6(b) shows the astigmatism field curves of the zoom lens at the long focal end. Figure 5 As can be seen from Fig. 6(a), the focal shift in the meridional direction is controlled within the range of 0-0.01 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.02 mm. Figure 5 Fig. 6(b) shows the astigmatism field curves of the zoom lens at the long focal end, and Fig. 6(b) shows the astigmatism field curves of the zoom lens at the long focal end. Figure 5 As can be seen from Fig. 6(b), the focal shift in the meridional direction is controlled within the range of 0-0.005 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.02 mm. It can be seen that the astigmatism and field curvature are strictly corrected, and the imaging quality is excellent.

[0228] Figure 6 Fig. 7 shows the distortion curves of light with a wavelength of 555 nm after passing through the zoom lens of Embodiment Two.

[0229] Figure 6 Fig. 7(a) shows the distortion curves of the zoom lens at the short focal end, and Fig. 7(b) shows the distortion curves of the zoom lens at the long focal end. Figure 6 As can be seen from Fig. 7(a), the distortion is controlled within the range of 0-2%. Figure 6 Fig. 7(b) shows the distortion curves of the zoom lens at the long focal end, and Fig. 7(b) shows the distortion curves of the zoom lens at the long focal end. Figure 6 As can be seen from Fig. 7(b), the distortion is controlled within the range of 0-1%. The maximum distortion of the zoom lens is within 2%, the distortion is low, and the imaging quality is good.

[0230] ​​​Embodiment Three

[0231] Figure 7 A schematic view of the zoom lens of Embodiment Three is shown. In which, Figure 7 (a) of FIG. 3A shows a schematic view of the zoom lens of Embodiment Three at the short focal end; Figure 7 (b) of FIG. 3A shows a schematic view of the zoom lens of Embodiment Three at the long focal end.

[0232] As shown in Figure 7 the zoom lens comprises a first lens group 10 and a second lens group 20, the first lens group 10 is composed of a first lens 11 with positive refractive power, a second lens 12 with negative refractive power, a third lens 13 with positive refractive power, and a fourth lens 14 with positive refractive power, the second lens group 20 is composed of a fifth lens 25 with negative refractive power, a sixth lens 26 with positive refractive power, a seventh lens 27 with negative refractive power, and an eighth lens 28 with positive refractive power.

[0233] According to the above relationship, the design parameters of the zoom lens in Embodiment Three of the present application are as shown in Table 3A.

[0234] Table 3A Design parameters of Embodiment Three

[0235]

[0236] Table 3B shows the aspheric coefficients of each lens of the zoom lens in Embodiment Three of the present application, as shown in Table 3B.

[0237] Table 3B Aspheric coefficients of the zoom lens of Embodiment Three

[0238]

[0239]

[0240] Wherein, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients.

[0241] The aspheric surface of each lens in the zoom lens in Embodiment Three can use the aspheric surface equation in Embodiment One, or other aspheric formulas, which are not limited in the present application.

[0242] Table 3C shows the basic parameters of the zoom lens in Embodiment Three of the present application, as shown in Table 3C.

[0243] Table 3C Basic parameters of the zoom lens of Embodiment Three

[0244] Wide end Tele end f 17.00mm 24.00mm FNO 3.15 4.44 FOV 26.00° 18.77° TTL 19.00mm 19.40mm d1 3.484mm -0.4mm d9 1.47mm 0.2mm d18 0.55mm 5.706mm

[0245] 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.

[0246] 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.

[0247] 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 to 0.015 mm, and the focal offset in the sagittal direction is controlled within the range of 0 to 0.02 mm. Figure 8 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 8 As can be seen in (b), the focal offset in the meridional direction is controlled within the range of 0–0.01 mm, and the focal offset in the sagittal direction is controlled within the range of 0–0.025 mm. This demonstrates that astigmatism and field curvature have been rigorously corrected, resulting in excellent image quality.

[0248] 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.

[0249] 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 to 2.5%; Figure 9 (b) shows a schematic diagram of the distortion curve of a zoom lens at the telephoto end. Figure 9 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.

[0250] Example 4

[0251] 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.

[0252] 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.

[0253] 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.

[0254] Based on the above relationship, the design parameters of the zoom lens in Embodiment 4 of this application are shown in Table 4A below.

[0255] Table 4A Design Parameters for Example 4

[0256]

[0257] Table 4B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 4 of this application, as shown in Table 4B.

[0258] Table 4B Aspherical coefficient of zoom lens in Example 4

[0259]

[0260]

[0261] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0262] 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.

[0263] Table 4C shows the basic parameters of the zoom lens in Embodiment 4 of this application, as shown in Table 4C.

[0264] Table 4C Basic parameters of zoom lens of Example Four

[0265] Wide end Tele end f 16.00mm 24.00mm FNO 2.96 4.44 FOV 27.60° 18.90° TTL 15.34mm 19.90mm d9 1.707mm 0.2mm d18 2.05mm 7.116mm

[0266] 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 between the image side surface of the fourth lens 14 and the object side surface of the fifth lens 25 on the optical axis, and d18 represents the gap between the image side surface of the eighth lens 28 and the object side surface of the infrared cut-off filter 40 on the optical axis.

[0267] Figure 11 Fig. 4C shows the astigmatism field curves of light with a wavelength of 555 nm after passing through the zoom lens of Example Four, wherein the solid line represents the focal shift in the meridional direction, and the dotted line represents the focal shift in the sagittal direction. Figure 11

[0268] wherein, Figure 11 Fig. 4C(a) shows the astigmatism field curves of the zoom lens at the short focal end, and Fig. 4C(b) shows the astigmatism field curves of the zoom lens at the long focal end. Figure 11 As can be seen from Fig. 4C(a), the focal shift in the meridional direction is controlled within the range of 0-0.025 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.025 mm. Figure 11 Fig. 4C(b) shows the astigmatism field curves of the zoom lens at the long focal end, and Fig. 4C(b) shows the astigmatism field curves of the zoom lens at the long focal end. Figure 11 As can be seen from Fig. 4C(b), the focal shift in the meridional direction is controlled within the range of 0-0.025 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.05 mm. It can be seen that the astigmatism and field curvature are strictly corrected, and the imaging quality is excellent.

[0269] Figure 12 Fig. 5C shows the distortion curves of light with a wavelength of 555 nm after passing through the zoom lens of Example Four.

[0270] wherein, Figure 12 Fig. 5C(a) shows the distortion curves of the zoom lens at the short focal end, and Fig. 5C(b) shows the distortion curves of the zoom lens at the long focal end. Figure 12 As can be seen from Fig. 5C(a), the distortion is controlled within the range of 0-2%. Figure 12 Fig. 5C(b) shows the distortion curves of the zoom lens at the long focal end, and Fig. 5C(b) shows the distortion curves of the zoom lens at the long focal end. Figure 12 As can be seen from Fig. 5C(b), the distortion is controlled within the range of 0-0.2%. The maximum distortion of the zoom lens is within 2%, the distortion is low, and the imaging quality is good.

[0271] Example Five

[0272] Figure 13 Fig. 6 shows a schematic diagram of the zoom lens of Example Five, 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.

[0273] 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.

[0274] Based on the above relationship, the design parameters of the zoom lens in Embodiment 5 of this application are shown in Table 5A below.

[0275] Table 5A Design Parameters for Example 5

[0276]

[0277]

[0278] Table 5B shows the aspherical coefficients of each lens in the zoom lens of Embodiment 5 of this application, as shown in Table 5B.

[0279] Table 5B Aspherical coefficient of zoom lens in Example 5

[0280]

[0281]

[0282] Where k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients.

[0283] 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.

[0284] Table 5C shows the basic parameters of the zoom lens in Embodiment 5 of this application, as shown in Table 5C.

[0285] Table 5C Example 5 Basic Parameters of Zoom Lens

[0286] Wide end Tele end f 17.00mm 24.00mm FNO 3.15 4.44 FOV 26.00° 18.77° TTL 19.00mm 19.40mm d1 3.482mm -0.4mm d9 1.534mm 0.2mm d18 0.55mm 6.105mm

[0287] In Table 5C, f represents the focal length of the zoom lens, FNO represents the aperture value, FOV represents the field angle, TTL represents the total track length, dl represents the gap on the optical axis between the aperture stop 30 and the object side of the first lens 11, 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 dl8 represents the gap on the optical axis between the image side of the eighth lens 28 and the object side of the infrared cut filter 40.

[0288] Figure 14 Figures showing the astigmatic field curves of light with a wavelength of 555 nm after passing through the zoom lens of Example Five are shown in Figure 14 The solid line in (a) of Fig. 5C represents the focal shift in the meridional direction, and the dotted line represents the focal shift in the sagittal direction.

[0289] In (a) of Fig. 5C, (a) shows the astigmatic field curve schematic diagram of the zoom lens at the short focus end, and (b) shows the astigmatic field curve schematic diagram of the zoom lens at the long focus end. Figure 14 As can be seen from (a) of Fig. 5C, the focal shift in the meridional direction is controlled within the range of 0-0.01 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.025 mm. Figure 14 As can be seen from (a) of Fig. 5C, the focal shift in the meridional direction is controlled within the range of 0-0.01 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.025 mm. Figure 14 (b) of Fig. 5C shows the astigmatic field curve schematic diagram of the zoom lens at the long focus end, and (b) shows the astigmatic field curve schematic diagram of the zoom lens at the long focus end. Figure 14 As can be seen from (b) of Fig. 5C, the focal shift in the meridional direction is controlled within the range of 0-0.005 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.02 mm. It can be seen that the astigmatism and field curvature are strictly corrected, and the imaging quality is excellent.

[0290] Figure 15 Figures showing the distortion curves of light with a wavelength of 555 nm after passing through the zoom lens of Example Five are shown in

[0291] In (a) of Fig. 5C, (a) shows the astigmatic field curve schematic diagram of the zoom lens at the short focus end, and (b) shows the astigmatic field curve schematic diagram of the zoom lens at the long focus end. Figure 15 As can be seen from (a) of Fig. 5C, the focal shift in the meridional direction is controlled within the range of 0-0.01 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.025 mm. Figure 15 As can be seen from (a) of Fig. 5C, the focal shift in the meridional direction is controlled within the range of 0-0.01 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.025 mm. Figure 15 (b) of Fig. 5C shows the astigmatic field curve schematic diagram of the zoom lens at the long focus end, and (b) shows the astigmatic field curve schematic diagram of the zoom lens at the long focus end. Figure 15 As can be seen from (b) of Fig. 5C, the focal shift in the meridional direction is controlled within the range of 0-0.005 mm, and the focal shift in the sagittal direction is controlled within the range of 0-0.02 mm. It can be seen that the astigmatism and field curvature are strictly corrected, and the imaging quality is excellent.

[0292] Example Six

[0293] Figure 16 A schematic diagram of the zoom lens of Example Six is shown in Fig. 6. In (a) of Fig. 6, (a) shows the schematic diagram of the zoom lens of Example Six at the short focus end. Figure 16 Figure 16 ​(b) in FIG. 6 shows a schematic view of the zoom lens of Example 6 at the long focal end.

[0294] As Figure 16 The zoom lens shown in FIG. 6 includes a first lens group 10 and a second lens group 20, the first lens group 10 is composed of a first lens 11 having positive refractive power, a second lens 12 having negative refractive power, a third lens 13 having positive refractive power, and a fourth lens 14 having positive refractive power, the second lens group 20 is composed of a fifth lens 25 having negative refractive power, a sixth lens 26 having positive refractive power, a seventh lens 27 having negative refractive power, and an eighth lens 28 having negative refractive power.

[0295] According to the above relationship, the design parameters of the zoom lens in Example 6 of the present application are shown in Table 6A.

[0296] Table 6A Design parameters of Example 6

[0297]

[0298] Table 6B shows the aspheric coefficients of each lens of the zoom lens in Example 6 of the present application, as shown in Table 6B.

[0299] Table 6B Aspheric coefficients of the zoom lens of Example 6

[0300]

[0301]

[0302] Wherein, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients.

[0303] The aspheric surface of each lens in the zoom lens in Example 6 can use the aspheric surface equation in Example 1, or other aspheric formula, which is not limited in the present application.

[0304] Table 6C shows the basic parameters of the zoom lens in Example 6 of the present application, as shown in Table 6C.

[0305] Table 6C Basic parameters of the zoom lens of Example 6

[0306] Wide end Tele end f 17.00mm 24.00mm FNO 3.03 4.28 FOV 26.00° 18.80° TTL 19.00mm 19.40mm d1 3.366mm -0.4mm d9 1.677mm 0.2mm d18 0.55mm 5.794mm

[0307] 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.

[0308] Figure 17 A 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.

[0309] 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 to 0.01 mm, and the focal offset in the sagittal direction is controlled within the range of 0 to 0.01 mm. Figure 17 (b) shows a schematic diagram of the astigmatism curve of a zoom lens at the telephoto end. Figure 17 As shown in (b), the focal offset in the meridional direction is controlled within the range of 0–0.03 mm, and the focal offset in the sagittal direction is also controlled within the range of 0–0.03 mm. This demonstrates that astigmatism and field curvature have been rigorously corrected, resulting in excellent image quality.

[0310] 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.

[0311] 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 to 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%, with low distortion levels, demonstrating good image quality.

[0312] Table 7 lists the conditions satisfied by the above zoom lens and the values ​​of each condition in the embodiments of this application.

[0313] Table 7. Conditions satisfied by zoom lenses and their corresponding values.

[0314] Parameters and conditions Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 f G1 / fw]] 0.60 0.59 0.59 0.61 0.58 0.63 TTLt / ft 0.821 0.808 0.808 0.829 0.808 0.808 FNOt 4.55 4.44 4.45 4.40 4.44 4.28 ft / fw 1.51 1.41 1.41 1.50 1.41 1.41 TTLt / Imgh 5.05 4.85 4.85 4.98 4.85 4.85 TT 1-n / TTLt]]> 0.26 0.27 0.28 0.27 0.28 0.29 f G1 / f1]]> 0.70 1.03 0.85 0.77 0.99 0.91 f G1 / f4]]> 1.07 0.86 0.99 1.16 1.10 1.02

[0315] The zoom lens provided by the embodiments of the present application has the advantages of large zoom ratio, excellent imaging quality, miniaturization, easy processing and manufacturing, high yield, and the like, while meeting the above conditions.

[0316] The embodiments of the present application also provide a lens module 100, which comprises a reflecting member 60, an electronic photosensitive element 50, and the zoom lens described above. The reflecting member 60 is located on the object side of the zoom lens and is used to deflect light to the zoom lens. The electronic photosensitive element 50 is located on the image side of the zoom lens, and the zoom lens is used to image light to the electronic photosensitive element 50.

[0317] The reflecting member 60 can be arranged at any desired angle to bend the light path. The reflecting member 60 deflects light to the first lens group 10 of the zoom lens. The light passes through the first lens group 10, the second lens group 20, and the infrared cut-off filter 40 in sequence and is imaged on the electronic photosensitive element 50.

[0318] Figure 19 FIG. 1 is a schematic diagram of an example of the lens module 100 provided by the embodiments of the present application. Figure 20 FIG. 2 is a schematic diagram of another example of the lens module 100 provided by the embodiments of the present application.

[0319] As shown in FIG. 3, in some embodiments, the reflecting member 60 is a prism. The prism comprises two straight edges and one oblique edge. Light enters the prism through one straight edge, is reflected by the oblique edge, and exits the prism through the other straight edge. The oblique edge can form a 45° angle with the optical axis of the zoom lens. The angle can also be adjusted as needed. The present application does not strictly limit the structure of the prism, the position of the oblique edge, or the angle. Figure 19 As shown in FIG. 4, in some embodiments, the reflecting member 60 is a mirror. The reflecting surface of the mirror can form a 45° angle with the optical axis of the zoom lens. The angle can also be adjusted as needed. The present application does not strictly limit the position of the reflecting surface of the mirror, the angle, and the like.

[0320] Figure 20 Optionally, the reflecting surface of the mirror can be a metal reflecting film layer prepared by evaporation or sputtering. The metal can be nickel, aluminum, silver, gold, or an alloy thereof.

[0321] Optionally, the reflecting surface of the mirror can be a metal reflecting film layer prepared by evaporation or sputtering. The metal can be nickel, aluminum, silver, gold, or an alloy thereof.

[0322] ​The electronic photosensitive element 50 is a semiconductor chip, and the surface thereof includes hundreds of thousands to millions of photodiodes. When the electronic photosensitive element 50 is irradiated by light, charges are generated. The electronic photosensitive element 50 can be a charge coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS). The charge coupled device is made of a high-sensitivity semiconductor material, and can convert light into charges. The charge coupled device is composed of a plurality of light-sensitive units, usually in units of millions of pixels. When the surface of the charge coupled device is irradiated by light, each light-sensitive unit reflects charges on the component. The signals generated by all the light-sensitive units are added together to form a complete picture. The complementary metal-oxide semiconductor is mainly made of silicon and germanium, and the two elements coexist on the complementary metal-oxide semiconductor, that is, the semiconductor with N (negative) and P (positive) levels. The current generated by the two complementary effects can be recorded and interpreted into an image by a processing chip.

[0323] In the embodiment of the present application, the reflecting member 60 can change the propagation direction of the light, so that the optical axis direction of the zoom lens can be different from the direction in which the external light enters 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 requirement of the accommodation space in the thickness direction of the electronic device.

[0324] In addition, since the lens module 100 adopts the zoom lens described above, the lens module 100 also has the advantages of large zoom ratio, excellent imaging quality, miniaturization, easy processing and manufacturing, high yield and the like corresponding to the zoom lens.

[0325] Optionally, the lens module 100 can also include some or all of the following elements (not shown in the figure): a holder, an autofocus driving assembly, a circuit board, a connector, and peripheral electronic elements. The holder can be used to fix the lens, the autofocus driving assembly can include a voice coil motor, a driving integrated circuit, etc., and is used for automatic focusing or optical image stabilization of the lens. The circuit board can be a flexible printed circuit (FPC) or a printed circuit board (PCB), and is used for transmitting electrical signals. The FPC can be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board, a rigid-flexible board, or a flexible circuit board with a hybrid structure, etc.

[0326] Figure 21 FIG. 1 is a schematic diagram of an electronic device provided by an embodiment of the present application. Figure 21The parts (a) and (b) in FIG. 1 are respectively a front view and a back view of the electronic device.

[0327] As shown in FIG. 1, the electronic device provided by the embodiment of the present application further includes a lens module 100. Figure 21 As shown in FIG. 1, the electronic device provided by the embodiment of the present application further includes a lens module 100.

[0328] The number of the lens module 100 is not limited to one, and can be two or more, for example, two lens modules 100 are installed on the back of the electronic device. The number of the lens module 100 is not limited by the embodiment of the present application.

[0329] The lens module 100 can be used to shoot external videos or photos, and can be used to shoot scenes at different distances, for example, the lens module 100 can be used to shoot distant scenes, can be used to shoot close scenes, and can be used to shoot micro scenes. The lens module 100 can also be used for self-shooting. Figure 21 The lens module 100 installed on the back of the mobile phone shown in FIG. 1 can also be used as a front camera.

[0330] In addition, the electronic device further includes a shell 200 and a display screen 300, the display screen 300 is installed on the shell 200, the shell 200 forms a containing space inside, the lens module 100 can be installed in the containing space, the display screen 300 is electrically connected with the processor, and the display screen 300 can display pictures or videos processed by the processor.

[0331] Since the lens module 100 has the advantage of miniaturization, the size requirement of the containing space is low, thereby, the thinness of the electronic device can be realized by reducing the thickness of the shell 200, or, on the premise of not changing the thickness of the shell 200, the containing space saved by the lens module 100 can be left for other functional elements.

[0332] Optionally, the display screen 300 can 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 thereto.

[0333] Optionally, the shell 200 can further include other devices, for example, a battery, a flash, a fingerprint identification module, a receiver, a circuit board, a sensor, etc., but is not limited thereto.

[0334] Optionally, the electronic device can be a terminal device with a camera or photographing function, such as a mobile phone, a tablet computer, a laptop computer, a video camera, a video recorder, a camera, a smart robot, or other forms of devices with a photographing or camera function.

[0335] Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A zoom lens, characterized in that, Comprising: a first lens group (10) having positive refractive power and a second lens group (20) having negative refractive power are sequentially arranged from the object side to the image side; when the zoom lens zooms from a short focal length end state to a long focal length end state, 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) comprises: a first lens (11) having positive refractive power, a second lens (12) having negative refractive power, a third lens (13) having refractive power, and a fourth lens (14) having positive refractive power, sequentially arranged from the object side to the image side; the zoom lens satisfies the following relationship: ft / fw < 1.6; wherein ft is the focal length of the zoom lens in the long focal length end state, and fw is the focal length of the zoom lens in the short focal length end state.

2. The zoom lens according to claim 1, characterized by the zoom lens satisfies the following relationship: 0.5 < f G1 fw<0.8; wherein f G1 is the focal length of the first lens group (10), and fw is the focal length of the zoom lens in a short-focus end state.

3. The zoom lens according to claim 1 or 2, characterized by the zoom lens satisfies the following relationship: TTLt / ft < 1.0; wherein TTLt is the total optical length of the zoom lens in the long focal length end state, and ft is the focal length of the zoom lens in the long focal length end state.

4. The zoom lens according to any one of claims 1 to 3, characterized by the object side surface of the first lens (11) is convex, and the image side surface of the fourth lens (14) is convex.

5. The zoom lens according to any one of claims 1 to 4, characterized by the zoom lens satisfies the following relationship: FNOt < 5; wherein FNOt is the aperture value of the zoom lens in the long focal length end state.

6. The zoom lens according to any one of claims 1 to 5, characterized by the zoom lens satisfies the following relationship: TTLt / Imgh < 5.5; wherein Imgh is half the diagonal length of the pixel area of the electronic photosensitive element (50) on the focusing plane.

7. The zoom lens according to any one of claims 1 to 6, characterized by the zoom lens satisfies the following relationship: TT 1-n / TTLt<0.4; wherein TT 1-n is the sum of the thicknesses of all the lenses in the first lens group (10) and the second lens group (20) on the optical axis.

8. The zoom lens according to any one of claims 1 to 7, characterized by the zoom lens satisfies the following relationship: 0.6 < f G1 / f1 < 1.2; wherein f1 is the focal length of the first lens (11).

9. The zoom lens according to any one of claims 1 to 8, characterized by the zoom lens satisfies the following relationship: 0.6 < f G1 f4 < 1.2; wherein f4 is the focal length of the fourth lens (14).

10. The zoom lens according to any one of claims 1 to 9, characterized by the second lens group (20) comprises: a fifth lens (25) having refractive power, a sixth lens (26) having refractive power, a seventh lens (27) having negative refractive power, and an eighth lens (28) having refractive power, sequentially arranged from the object side to the image side.

11. A lens module, characterized by, comprising a mirror lens module as claimed in any one of claims 1 to 10, an electronic photosensitive element (50) located on the image side of the mirror lens module, and a reflecting element (60) located on the object side of the mirror lens module for deflecting light to the mirror lens module.

12. An electronic device, comprising: comprising a processor and a lens module as claimed in claim 11, the lens module being used to obtain image data and input the image data into the processor, and the processor being used to process the image data.

Images