Optical imaging lens, camera module, and terminal device

Abstract

An optical imaging lens (100), a camera module (200), and a terminal device (1000). The optical imaging lens (100) comprises a first lens (10), a second lens (20), a third lens (30), a fourth lens (40), a fifth lens (50), and a sixth lens (60); the maximum entrance pupil diameter of the optical imaging lens (100) is EPDmax; the minimum entrance pupil diameter of the optical imaging lens (100) is EPDmin; and the following relation is satisfied: (EPDmax-EPDmin) / EPDmax>0.35. Therefore, the optical imaging lens (100) has a large variable-aperture change range, which is beneficial for improving the imaging effect of the optical imaging lens (100) when switching between bright and dark environments; and the number of lenses of the optical imaging lens (100) is six, thereby achieving low costs and a small size, and obtaining a high-quality imaging picture.

Description

Optical imaging lens, camera module and terminal device

[0001] The present application claims priority to the Chinese patent application No. 202411403387.5, filed on September 30, 2024, and entitled "Optical imaging lens, camera module and terminal device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of optical imaging technology, in particular to an optical imaging lens, a camera module and a terminal device. BACKGROUND

[0003] In recent years, with the rapid development of intelligent mobile terminals (mobile phones, tablet computers, etc.), consumers' needs for shooting experience and photo quality are also increasingly high, and handheld mobile terminals with high imaging quality are increasingly favored by people.

[0004] However, in some flagship models, the variable aperture camera module usually adopts an optical imaging lens with 7 or 8 lenses, which has high cost and large size. Therefore, in the case of relatively few lenses, it is worth considering how to obtain high-quality photos. SUMMARY

[0005] The present application provides an optical imaging lens, a camera module and a terminal device, which can improve the technical problem that the optical imaging lens in the related art is difficult to have low cost, small size and high imaging quality.

[0006] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides an optical imaging lens, which comprises, in order from the object side to the image side:

[0008] a first lens with positive refractive power, the object side surface of the first lens being a convex surface, and the image side surface of the first lens being a concave surface;

[0009] a second lens with negative refractive power, the object side surface of the second lens being a convex surface, and the image side surface of the second lens being a concave surface;

[0010] a third lens with positive refractive power;

[0011] a fourth lens with negative refractive power, the image side surface of the fourth lens being a concave surface;

[0012] a fifth lens with positive refractive power, the object side surface of the fifth lens being a convex surface, and the image side surface of the fifth lens being a convex surface;

[0013] The sixth lens has negative optical power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave.

[0014] The optical imaging lens has a maximum entrance pupil diameter EPDmax and a minimum entrance pupil diameter EPDmin, and satisfies (EPDmax-EPDmin) / EPDmax>0.35.

[0015] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0016] The optical imaging lens has a maximum entrance pupil diameter EPDmax and a minimum entrance pupil diameter EPDmin, and satisfies (EPDmax-EPDmin) / EPDmax>0.35, so that the optical imaging lens has a large variable aperture range, which is beneficial to the imaging effect of the optical imaging lens when switching between bright and dark environments. In addition, the optical imaging lens has six lenses, has a lower cost and a smaller size, and can obtain a higher-quality imaging picture.

[0017] In some embodiments, the distance Dtstop between the maximum aperture position and the minimum aperture position of the optical imaging lens in the optical axis direction, and the maximum distance sag11 between the intersection of the object side surface of the first lens and the optical axis and any point on the object side surface of the first lens in the optical axis direction satisfy 0≤Dstop / sag11<0.9.

[0018] It can be understood that 0≤Dstop / sag11<0.9 can reasonably arrange the variable aperture position on the object side of the first lens, which is beneficial to the installation of the variable aperture assembly.

[0019] In some embodiments, the effective focal length of the second lens is f2, and the total effective focal length of the optical imaging lens is f.

[0020] -0.5<f / f2<-0.2.

[0021] It can be understood that -0.5<f / f2<-0.2 can effectively control the ratio of the effective focal length of the second lens to the total effective focal length of the imaging lens, balance the aberration introduced by the first lens, and improve the imaging quality.

[0022] In some embodiments, the effective focal length of the third lens is f3, and the total effective focal length of the optical imaging lens is f.

[0023] 2.5<f3 / f<10.

[0024] It can be understood that, by satisfying 2.5 < f3 / f < 10, the ratio of the effective focal length of the third lens to the total effective focal length of the imaging lens can be effectively controlled, the light can be smoothly transmitted to the subsequent lens, the system aberration can be reduced, and the imaging quality can be improved.

[0025] In some embodiments, a distance from the object side surface of the first lens to the imaging surface of the optical imaging lens in the optical axis direction is TTL, a curvature radius of the object side surface of the first lens is R11, and a curvature radius of the image side surface of the sixth lens is R62.

[0026] 10 < TTL / (R62 / R11) < 11.5.

[0027] It can be understood that, by satisfying 10 < TTL / (R62 / R11) < 11.5, the shape of the entrance surface and the exit surface of the lens can be effectively balanced, the smaller TTL can be obtained, the lens aberration can be reduced, and the imaging quality can be improved.

[0028] In some embodiments, a maximum half field of view of the optical imaging lens is HFOV.

[0029] EPDmax*tan(HFOV) > 2.9.

[0030] It can be understood that, by satisfying EPDmax*tan(HFOV) > 2.9, the optical imaging lens can have a larger light aperture, and the imaging effect of the optical imaging lens in a dark environment can be improved.

[0031] In some embodiments, a distance from the object side surface of the first lens to the imaging surface of the optical imaging lens in the optical axis direction is TTL, and a half of a diagonal line length of an effective pixel area on the imaging surface of the photographic lens is ImgH.

[0032] TTL / ImgH ≤ 1.4.

[0033] It can be understood that, by satisfying TTL / ImgH ≤ 1.4, the TTL of the lens can be effectively lowered, and the module miniaturization can be realized.

[0034] In some embodiments, an effective focal length of the first lens is f1, an effective focal length of the sixth lens is f6, a curvature radius of the object side surface of the first lens is R11, and a curvature radius of the image side surface of the sixth lens is R62.

[0035] 4.5 < f1 / R11-f6 / R62 < 5.

[0036] It can be understood that, by satisfying 4.5 < f1 / R11-f6 / R62 < 5, the effective focal length and the lens shape of the first lens and the sixth lens can be effectively constrained, the optical power of the two lenses can be reasonably distributed, the system aberration can be balanced, and the system imaging quality can be improved.

[0037] In some embodiments, the effective focal length of the first lens is f1, the effective focal length of the fourth lens is f4, and the effective focal length of the fifth lens is f5;

[0038] -1 < F1 / (F4+F5) < 0.

[0039] It can be understood that, by satisfying -1 < F1 / (F4+F5) < 0, the refractive powers of the first lens, the fourth lens and the fifth lens can be reasonably distributed, the system aberration can be balanced, and the system imaging quality can be improved.

[0040] In some embodiments, the central thickness of the second lens on the optical axis is CT2, the central thickness of the third lens on the optical axis is CT3, and the distance between the image side surface of the second lens and the object side surface of the third lens on the optical axis is DT23;

[0041] 1.5 < (CT2+CT3) / DT23 < 2.5.

[0042] It can be understood that, by satisfying 1.5 < (CT2+CT3) / DT23 < 2.5, the structural distribution of the second lens and the third lens can be more reasonable, which is beneficial to the assembly of the imaging lens.

[0043] In some embodiments, the central thickness of the fourth lens on the optical axis is CT4, the central thickness of the fifth lens on the optical axis is CT5, and the central thickness of the sixth lens on the optical axis is CT6;

[0044] 1.3 < (CT4) / (CT5-CT6) < 2.

[0045] It can be understood that, by satisfying 1.3 < (CT4) / (CT5-CT6) < 2, the structures of the fourth lens, the fifth lens and the sixth lens can be more uniform and reasonable, which is beneficial to the processing and molding of the lenses.

[0046] In some embodiments, the maximum distance between the intersection of the object side surface of the fifth lens and the optical axis and any point on the object side surface of the fifth lens in the optical axis direction is Sag51, the maximum distance between the intersection of the image side surface of the sixth lens and the optical axis and any point on the image side surface of the sixth lens in the optical axis direction is Sag62, the central thickness of the fifth lens on the optical axis is CT5, and the central thickness of the sixth lens on the optical axis is CT6;

[0047] 1 < |Sag51 / CT5|+|Sag62 / CT6| < 2.

[0048] It can be understood that, by satisfying 1 < |Sag51 / CT5|+|Sag62 / CT6| < 2, the surface shape of the fifth lens and the sixth lens can be smoother, which is beneficial to the processing and molding of the lenses. At the same time, the field curvature of the imaging lens can be effectively balanced.

[0049] In some embodiments, a maximum distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens is Td, and a sum of thicknesses of all lenses of the optical imaging lens on the optical axis is ∑CT;

[0050] 1.5 < Td / ∑CT < 1.8.

[0051] It can be understood that, by satisfying 1.5 < Td / ∑CT < 1.8, the spatial arrangement of the imaging lens group is facilitated, and the volume and total length of the imaging lens group are reduced to meet the miniaturization requirement.

[0052] In some embodiments, the object-side surface of the third lens is convex, and the image-side surface of the third lens is convex; or,

[0053] the object-side surface of the third lens is convex, and the image-side surface of the third lens is concave; and / or,

[0054] the object-side surface of the fourth lens is convex; or,

[0055] the object-side surface of the fourth lens is concave.

[0056] In a second aspect, the present application provides a camera module, comprising the optical imaging lens and a variable aperture stop, the variable aperture stop being configured to adjust the amount of light passing into the optical imaging lens.

[0057] In a third aspect, the present application provides a terminal device, comprising the camera module.

[0058] It can be understood that the beneficial effects of the second aspect and the third aspect described above can be referred to the related description in the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0059] FIG. 1 is a structural schematic diagram of a terminal device according to an embodiment of the present application;

[0060] FIG. 2 is a schematic diagram of an imaging principle according to an embodiment of the present application;

[0061] FIG. 3 is a structural schematic diagram of an optical imaging lens according to an embodiment of the present application;

[0062] FIG. 4 is an optical data table of the optical imaging lens according to the first embodiment of the present application;

[0063] FIG. 5 is an aspheric surface data table of each lens of the optical imaging lens according to the first embodiment of the present application;

[0064] FIG. 6 is a lateral chromatic aberration curve on the image plane of the optical imaging lens according to the first embodiment of the present application in a large aperture state;

[0065] FIG. 7 is a distortion aberration on the image plane of the optical imaging lens according to the first embodiment of the present application in a large aperture state;

[0066] FIG. 8 is a lateral chromatic aberration curve on the image plane of the optical imaging lens in a small aperture state according to the first embodiment of the present application;

[0067] FIG. 9 is a distortion aberration on the image plane of the optical imaging lens in a small aperture state according to the first embodiment of the present application;

[0068] FIG. 10 is an optical data table of the optical imaging lens according to the second embodiment of the present application;

[0069] FIG. 11 is an aspheric surface data table of each lens of the optical imaging lens according to the second embodiment of the present application;

[0070] FIG. 12 is a lateral chromatic aberration curve on the image plane of the optical imaging lens in a large aperture state according to the second embodiment of the present application;

[0071] FIG. 13 is a distortion aberration on the image plane of the optical imaging lens in a large aperture state according to the second embodiment of the present application;

[0072] FIG. 14 is a lateral chromatic aberration curve on the image plane of the optical imaging lens in a small aperture state according to the second embodiment of the present application;

[0073] FIG. 15 is a distortion aberration on the image plane of the optical imaging lens in a small aperture state according to the second embodiment of the present application;

[0074] FIG. 16 is an optical data table of the optical imaging lens according to the third embodiment of the present application;

[0075] FIG. 17 is an aspheric surface data table of each lens of the optical imaging lens according to the third embodiment of the present application;

[0076] FIG. 18 is a lateral chromatic aberration curve on the image plane of the optical imaging lens in a large aperture state according to the third embodiment of the present application;

[0077] FIG. 19 is a distortion aberration on the image plane of the optical imaging lens in a large aperture state according to the third embodiment of the present application;

[0078] FIG. 20 is a lateral chromatic aberration curve on the image plane of the optical imaging lens in a small aperture state according to the third embodiment of the present application;

[0079] FIG. 21 is a distortion aberration on the image plane of the optical imaging lens in a small aperture state according to the third embodiment of the present application;

[0080] FIG. 22 is an optical data table of the optical imaging lens according to the fourth embodiment of the present application;

[0081] FIG. 23 is an aspheric surface data table of each lens of the optical imaging lens according to the fourth embodiment of the present application;

[0082] FIG. 24 is a lateral chromatic aberration curve on the image plane of the optical imaging lens provided in Embodiment Four of the present application in a large aperture state;

[0083] FIG. 25 is a distortion aberration on the image plane of the optical imaging lens provided in Embodiment Four of the present application in a large aperture state;

[0084] FIG. 26 is a lateral chromatic aberration curve on the image plane of the optical imaging lens provided in Embodiment Four of the present application in a small aperture state;

[0085] FIG. 27 is a distortion aberration on the image plane of the optical imaging lens provided in Embodiment Four of the present application in a small aperture state;

[0086] FIG. 28 is an optical data table of the optical imaging lens provided in Embodiment Five of the present application;

[0087] FIG. 29 is an aspherical surface data table of each lens of the optical imaging lens provided in Embodiment Five of the present application;

[0088] FIG. 30 is a lateral chromatic aberration curve on the image plane of the optical imaging lens provided in Embodiment Five of the present application in a large aperture state;

[0089] FIG. 31 is a distortion aberration on the image plane of the optical imaging lens provided in Embodiment Five of the present application in a large aperture state;

[0090] FIG. 32 is a lateral chromatic aberration curve on the image plane of the optical imaging lens provided in Embodiment Five of the present application in a small aperture state;

[0091] FIG. 33 is a distortion aberration on the image plane of the optical imaging lens provided in Embodiment Five of the present application in a small aperture state;

[0092] FIG. 34 is an optical data table of the optical imaging lens provided in Embodiment Six of the present application;

[0093] FIG. 35 is an aspherical surface data table of each lens of the optical imaging lens provided in Embodiment Six of the present application;

[0094] FIG. 36 is a lateral chromatic aberration curve on the image plane of the optical imaging lens provided in Embodiment Six of the present application in a large aperture state;

[0095] FIG. 37 is a distortion aberration on the image plane of the optical imaging lens provided in Embodiment Six of the present application in a large aperture state;

[0096] FIG. 38 is a lateral chromatic aberration curve on the image plane of the optical imaging lens provided in Embodiment Six of the present application in a small aperture state;

[0097] FIG. 39 is a distortion aberration on the image plane of the optical imaging lens provided in Embodiment Six of the present application in a small aperture state.

[0098] In the figure, each reference sign: 1000, terminal device; 200, camera module; 300, shell; 400, display screen; 100, optical imaging lens; 101, image sensor; 102, analog-to-digital converter; 103, image processor; 104, memory; 10, first lens; 20, second lens; 30, third lens; 40, fourth lens; 50, fifth lens; 60, sixth lens. A, object side; B, image side; 30, variable aperture; 40, image plane; I, optical axis; E11, object side surface of the first lens; E21, object side surface of the second lens; E31, object side surface of the third lens; E41, object side surface of the fourth lens; E51, object side surface of the fifth lens; E61, object side surface of the sixth lens; E12, image side surface of the first lens; E22, image side surface of the second lens; E32, image side surface of the third lens; E42, image side surface of the fourth lens; E52, image side surface of the fifth lens; E62, image side surface of the sixth lens. DETAILED DESCRIPTION

[0099] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference signs throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0100] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0101] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inner", "outer", "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0102] The terms "first", "second", "third", "fourth", "fifth", "sixth" and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and embodiments. For example, if a first element is described as "converting" and a second element is described as "converting", either element can be termed a "converting" element, unless otherwise stated.

[0103] In the present application, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like are to be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0104] In the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships; for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the associated objects before and after it.

[0105] It should be noted that the words "in some embodiments", "exemplary", "for example" and the like in the present application are used to indicate an example, illustration or description. Any embodiment or design scheme described as "in some embodiments", "exemplary", "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "in some embodiments", "exemplary", "for example" and the like is intended to present the relevant concept in a specific way.

[0106] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments.

[0107] In a specific application scenario of the optical imaging lens, for example, when the lens is used for shooting in a sunny day or a night with direct street light, a bright line or bright arc with clear boundary will appear in the picture at a specific angle of view, which is called "lens ghost image", which greatly affects the shooting experience and quality of the user.

[0108] In addition, the main cause of the "lens ghost image" is the secondary reflection or the fourth reflection in the first lens of the optical imaging lens, and thus the brightness of the bright line or the bright arc in the image depends on the number of total reflections in the first lens of the optical imaging lens.

[0109] Therefore, the present application provides an optical imaging lens, a first lens group of the optical imaging lens includes a first lens, an intermediate medium and a second lens arranged in sequence from an object side to an image side, the refractive index of the first lens is n1, the refractive index of the second lens is n2, and the refractive index of the intermediate medium is n3, and the refractive indexes of the lenses and the intermediate medium satisfy the following relationship: |n1-n3| / n2<0.15. In this way, the chromatic aberration of the optical imaging lens can be balanced, the overall imaging quality of the optical imaging lens can be improved, and the probability of total reflection can be effectively reduced, so that the probability of the "lens ghost image" formed by total reflection can be reduced.

[0110] The terminal device 1000 involved in the embodiments of the present application can include a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing devices connected to a wireless modem. It can also include a cellular phone, a smart phone, a personal digital assistant (PDA) computer, a tablet computer, a laptop computer, a machine type communication (MTC) terminal, a point of sales (POS), a vehicle-mounted computer and other terminal devices 1000 with imaging functions.

[0111] For the convenience of understanding, the technical terms involved in the present application will be explained and described below.

[0112] Optical axis, the direction of the optical system conducting light, the chief ray of the reference central field of view. For a symmetric transmission system, it generally coincides with the optical system rotation center line. For off-axis and reflection systems, the optical axis also presents as a broken line.

[0113] Focal point, when a light ray parallel to the optical axis enters a convex lens, the ideal convex lens should be that all light rays converge at a point behind the lens, and this point of converging all light rays is called the focal point.

[0114] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the distance from the optical center of the lens or lens group to the focal point when an infinite scene passes through the lens or lens group to form a clear image on the focal plane. It can also be understood as the vertical distance from the optical center of the lens or lens group to the focal plane. From a practical point of view, it can be understood as the distance from the lens center to the imaging plane. For a fixed-focus lens, the position of the optical center is fixed, so the focal length is fixed; for a zoom lens, the change of the optical center of the lens leads to the change of the focal length, so the focal length can be adjusted.

[0115] Effective focal length refers to the distance from the position where light is focused on the sensor or film after passing through the lens to the front end of the lens. This distance is affected by factors such as optical path length, lens thickness, and refractive index.

[0116] According to the zoom range, the lens can be divided into several categories such as ultra-wide-angle lens (focal length less than 21mm), wide-angle lens (focal length 21mm-35mm), standard lens (focal length 35mm-70mm), medium telephoto lens (focal length 70mm-135mm), long-focus lens (focal length 135-500mm+), etc.

[0117] Zoom helps to enlarge distant objects when shooting at a distance. Optical zoom can support more pixels after the main subject is imaged, making the subject not only larger but also relatively clearer, without changing the resolution and image quality. Optical zoom relies on the structure of the optical lens to achieve zoom. Specifically, it changes the positions of the lens, object, and focal point. When the image plane moves horizontally, the visual and focal length change, and the more distant scenery becomes clearer. Optical zoom changes the focal length of the lens by changing the relative positions of the lenses in the zoom lens, thereby enlarging or reducing the scene to be photographed. This image enlargement is based on physical principles. During the enlargement process, the photosensitive element directly senses the subject and forms an image without any electronic enlargement processing. During this process, the photosensitive element is full-frame imaging, and the image maintains the original highest resolution. Therefore, the image obtained by optical zoom not only makes the subject larger, but also relatively clearer. The greater the optical zoom ratio, the farther the scene can be photographed.

[0118] The focal length of a zoom lens has two readings, the smaller number is called the wide-angle end (the largest angle of view can be obtained), and the larger number is called the telephoto end (the longest focal length can be obtained), and any focal length within the range of the two ends can be used when shooting, and the wider the wide-angle end of the lens focal length (i.e. the smaller the number), the wider the scene that can be shot, and the longer the telephoto end (i.e. the larger the number), the farther the scene that can be shot. The number obtained by dividing the number of the telephoto end by the number of the wide-angle end is the zoom ratio. For example, the optical zoom ratio is between 2 and 5, which can pull objects 10 meters away to 5-2 meters; lenses with a zoom ratio of 20 or more can not only capture large scenes in front of the lens, but also capture objects far away; a 50x zoom lens is equivalent to standing 60 meters away when shooting objects 3000 meters away.

[0119] The field of view (FOV) in optical instruments is the angle formed by the two edges of the maximum range of the object image of the measured target that can pass through the lens, with the lens as the vertex. The size of the field of view determines the field of view of the optical instrument, and the larger the field of view, the larger the field of view, and the smaller the optical magnification. The shorter the focal length, the wider the horizontal field of view, so the image is smaller, and the horizontal field of view becomes narrower as the focal length increases, and the subject increases.

[0120] Aberration, also known as axial chromatic aberration, longitudinal chromatic aberration, or axial aberration, is a phenomenon in which a bundle of parallel light rays converges at different positions before and after passing through the lens. This is because the lens images different colors of light at different positions, so that the final image of different colors cannot coincide on the focal plane, and the dispersion of the composite light forms chromatic dispersion.

[0121] The optical path of light in the lens refers to the path that the light takes from the entrance surface of the lens to the image surface during its journey.

[0122] Spherical and aspherical, mainly refers to the geometric shape of the lens of the lens (various cameras, microscopes, etc.), glasses (including contact lenses), i.e. spherical and aspherical lenses. The difference in geometric shape determines the difference in the direction of refraction of parallel incident light, thereby affecting the quality of the image.

[0123] Spherical lenses have a spherical arc shape, and their cross-sections also have an arc shape. When different wavelengths of light are incident on the lens at different positions with parallel optical axes, they cannot be focused to a point on the film plane (a plane perpendicular to the center of the lens and passing through the focal point), but form an aberration problem, affecting the quality of the image, such as a decrease in clarity and distortion.

[0124] Aspherical lens, the lens is not in the arc of the sphere, but the edge of the lens is cut a little, the cross section is flat. When the light incident to the aspherical lens, the light can be focused on a point, that is, the film plane, to eliminate various aberrations.

[0125] Freeform surface, in optics, a surface without a rotational symmetry axis is generally referred to as a freeform surface.

[0126] Object space, the space where the object is located is the object space.

[0127] Image space, the space where the image of the object is formed after the light emitted by the object passes through the lens is the image space.

[0128] The side of the lens where the object is located is called the object side, and the surface of the lens close to the object side can be called the object side surface. The side of the lens where the image of the object is located is called the image side, and the surface of the lens close to the image side can be called the image side surface.

[0129] The judgment of the concave and convex of the surface shape in the optical axis region can also be made by the judgment method of the person skilled in the art, that is, by the positive and negative signs of the curvature radius (abbreviated as R value) of the near axis. R value is commonly used in optical design software such as Zemax or CodeV. R value is also commonly found in the lens data sheet of the optical design software. In terms of the object side surface, when the R value is positive, it is determined that the optical axis region of the object side surface is convex; when the R value is negative, it is determined that the optical axis region of the object side surface is concave. Conversely, in terms of the image side surface, when the R value is positive, it is determined that the optical axis region of the image side surface is concave; when the R value is negative, it is determined that the optical axis region of the image side surface is convex. The results of this method are consistent with the results of the previous judgment method by the intersection of the light ray / extended light ray and the optical axis, that is, the judgment of the concave and convex of the surface shape by the focus of the light ray with a parallel optical axis located on the object side or the image side of the lens. The "a region is convex (or concave)", "a region is convex (or concave)", or "a convex (or concave) region" described in this specification can be used interchangeably.

[0130] FIG. 1 shows a schematic diagram of a terminal device 1000. The terminal device 1000 can be a terminal device with a camera or photographing function, such as a cellular phone, a mobile phone, a smart phone, a tablet computer, a handheld computer, a laptop computer, a video camera, a video recorder, a camera, a smart watch, a smart wristband, or other forms of devices with photographing or camera functions. Embodiments of the present application do not specially limit the specific form of the terminal device 1000. For the convenience of explanation and understanding, the terminal device 1000 is taken as a mobile phone for example in the following description.

[0131] The terminal device 1000 described above, as shown in FIG. 1, can include a display panel 400 (DP), a housing 300, a camera compact module 200 (CCM), and the like. The housing 300 is formed with an accommodation space, and the display panel 400 and the camera compact module 200 are arranged in the accommodation space of the housing 300. The display panel 400 can be a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) display panel, or the like, wherein the OLED display panel 400 can be a flexible display panel or a rigid display panel.

[0132] The camera compact module 200 can be arranged only on the front side of the terminal device 1000, for photographing a scene located on the front side of the terminal device 1000, which can be referred to as a front camera compact module in some embodiments. The camera compact module 200 can also be arranged only on the back side of the terminal device 1000, for photographing a scene located on the back side of the terminal device 1000, which can be referred to as a rear camera compact module in some embodiments. The camera compact module 200 can also be arranged on both the front side and the back side of the terminal device 1000, as shown in FIG. 1. The front side of the terminal device 1000 is provided with the camera compact module 200, and the back side of the terminal device 1000 is also provided with the camera compact module 200. The camera compact module 200 can photograph a scene located on the front side of the terminal device 1000, and also photograph a scene located on the back side of the terminal device 1000, as long as the corresponding camera compact module is used when photographing.

[0133] It should be understood that the mounting position of the camera module 200 is merely illustrative. In some embodiments, the camera module 200 can be mounted at other positions on the terminal device 1000 when serving as a front camera module, such as the left side of the handset, the upper middle position of the terminal device 1000, the lower part (or chin) of the terminal device 1000, or the four corners of the terminal device 1000; and the camera module 200 can be mounted at the upper middle position or the upper right corner of the back of the terminal device 1000 when serving as a rear camera module. In other embodiments, the camera module 200 can not be disposed on the main body of the terminal device 1000, but on an edge protruding from the main body of the terminal device 1000, or on a component movable or rotatable relative to the main body of the terminal device 1000, such as a component that can be extended, retracted, or rotated from the main body of the terminal device 1000. When the camera module 200 is rotatable relative to the terminal device 1000, the camera module 200 serves as both a front camera module and a rear camera module, i.e., the same camera module 200 can be used to capture a scene on the front side of the terminal device 1000 and a scene on the back side of the terminal device 1000 by rotating the camera module 200. In another embodiment, when the display screen 400 is foldable, the camera module 200 can serve as both a front camera module and a rear camera module, and the camera module 200 can be used to capture a scene on the front side of the terminal device 1000 or a scene on the back side of the terminal device 1000 by folding the display screen 400.

[0134] The number of camera modules 200 is not limited in the embodiments of the present application, and can be one, two, four, or even more. For example, the terminal device 1000 can have one or more camera modules 200 on the front side and one or more camera modules 200 on the back side. The number of camera modules is not limited in the embodiments of the present application, and the relative positions of the plurality of camera modules are also not limited. When a plurality of camera modules 200 are provided, the plurality of camera modules 200 can be identical or different, such as different numbers of lenses, different optical parameters of lenses, or different lens mounting positions.

[0135] The camera module 200 can be used to capture video and / or photos, and can be used to capture scenes at different distances, such as capturing distant scenes, capturing close scenes, or capturing micro-distance scenes. The embodiments of the present application are not limited in this regard.

[0136] Optionally, the terminal device 1000 can further include a lens protection lens for protecting the camera module 200. The lens protection lens is arranged on the shell 300 and used for covering the camera module 200. When the lens protection lens is used for protecting the front camera module, the lens protection lens can cover only the front camera module or cover the entire front surface of the terminal device 1000. When the lens protection lens covers the entire front surface of the terminal device 1000, the lens protection lens can be used for protecting both the front camera module and the display screen 400, and the lens protection lens is a cover glass (CG). When the lens protection lens is used for protecting the rear camera module, the lens protection lens can cover the entire back surface of the terminal device 1000 or can be arranged only at a position corresponding to the rear camera module and used for protecting the rear camera module. The material of the lens protection lens can be glass, sapphire, ceramic, etc., which is not specifically limited in the embodiments of the present application. In some embodiments, the lens protection lens is transparent, so that light outside the terminal device 1000 can enter the camera module 200 through the lens protection lens.

[0137] It should be noted that the front surface of the terminal device 1000 in the embodiments of the present application can be understood as a surface of the terminal device 1000 facing a user when the user uses the terminal device 1000, and the back surface of the terminal device 1000 can be understood as a surface of the terminal device 1000 facing away from the user when the user uses the terminal device 1000.

[0138] It should be understood that the terminal device 1000 shown in FIG. 1 is not limited to including the above devices, and can further include other devices, such as a battery, a flash, a fingerprint recognition module, an earpiece, a key, a sensor, etc. The embodiments of the present application are only described by taking a terminal with the camera module 200 as an example, but the elements installed on the terminal device 1000 are not limited thereto.

[0139] FIG. 2 shows an imaging principle diagram. Light L reflected by a photographed object passes through an optical imaging lens 100 to generate an optical image projected onto a surface of an image sensor 101, and the optical image is then converted into an electrical signal, i.e., an analog image signal S1. The analog image signal S1 is converted into a digital image signal S2 by an analog-to-digital converter 102 A / D (also referred to as an A / D converter) 203. The digital image signal S2 is processed by an image processor 103, such as a digital signal processing (DSP) chip, to form a compressed image signal S3, which can be stored in a memory 104 for processing and finally displayed on a display or display screen 400.

[0140] An optical lens affects the imaging quality and imaging effect. Light rays of a scene pass through the optical lens, and a clear image is formed on a focusing plane, and the image of the scene is recorded by a photosensitive material or a photosensitive sensor. The optical lens can be an integral body composed of one or more lenses. The lenses can be plastic lenses or glass lenses, can be spherical lenses or aspherical lenses, and can be refractive lenses or reflective lenses. The optical lens in the embodiments of the present application is a zoom lens. The focal length of the optical lens can be adjusted by adjusting the relative positions of the lenses.

[0141] The image sensor 101 is a semiconductor chip, and the surface thereof contains hundreds of thousands to millions of photodiodes. When the surface is irradiated by light, electric charges are generated, and the electric charges are converted into digital signals by the analog-to-digital converter 102 chip. The image sensor 101 can be a charge coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS). The charge coupled device image sensor 101 is made of a high-sensitivity semiconductor material, can convert light into electric charges, and convert the electric charges into digital signals by the analog-to-digital converter 102 chip. The CCD is composed of many light-sensitive units, usually in units of millions of pixels. When the surface of the CCD is irradiated by light, each light-sensitive unit reflects electric 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 CMOS is mainly made of silicon and germanium, and the two elements coexist on the CMOS, and the two complementary effects generate electric currents that can be recorded and interpreted into images by the processing chip. In some embodiments, the image sensor 101 can also be referred to as a photosensitive chip, a photosensitive element, etc.

[0142] The function of the image processor 103 is to optimize the digital image signal by a series of complex mathematical algorithm operations, and finally transmit the processed signal to the display. The image processor 103 can be an image processing chip or a digital signal processing chip (DSP). Its function is to quickly transmit the data obtained by the photosensitive chip to the central processing unit and refresh the photosensitive chip. Therefore, the quality of the DSP chip directly affects the picture quality (such as color saturation, definition, etc.).

[0143] It should be understood that the "lens" in the embodiments of the present application should be understood as an integral lens, which includes one or more lenses.

[0144] FIG. 3 shows a structural schematic diagram of an optical imaging lens 100. The structure of the optical imaging lens 100 is described below in combination with FIG. 3.

[0145] The optical imaging lens 100 provided in the application comprises, in sequence from the object side to the image side, a first lens 10 with positive refractive power, the object side surface of the first lens 10 being convex, and the image side surface of the first lens 10 being concave; a second lens 20 with negative refractive power, the object side surface of the second lens 20 being convex, and the image side surface of the second lens 20 being concave; a third lens 30 with positive refractive power; a fourth lens 40 with negative refractive power; the image side surface of the fourth lens 40 being concave; a fifth lens 50 with positive refractive power, the object side surface of the fifth lens 50 being convex, and the image side surface of the fifth lens 50 being convex; and a sixth lens 60 with negative refractive power, the object side surface of the sixth lens 60 being convex, and the image side surface of the sixth lens 60 being concave.

[0146] In the optical imaging lens 100, the maximum entrance pupil diameter is EPDmax, and the minimum entrance pupil diameter is EPDmin, and (EPDmax-EPDmin) / EPDmax>0.35 is satisfied.

[0147] The optical imaging lens 100 provided in the embodiment of the application satisfies (EPDmax-EPDmin) / EPDmax>0.35, so that the optical imaging lens has a large variable aperture change range, which is beneficial to the imaging effect of the optical imaging lens in switching between bright and dark environments, and the number of lenses of the optical imaging lens is six, the cost is lower, the volume is smaller, and a higher quality imaging picture can be obtained.

[0148] In some embodiments, the distance Dtstop between the maximum aperture position and the minimum aperture position of the optical imaging lens 100 in the optical axis direction, and the maximum distance sag11 between the intersection of the object side surface of the first lens 10 and the optical axis and any point on the object side surface of the first lens 10 in the optical axis direction satisfy 0≤Dstop / sag11<0.9.

[0149] It can be understood that 0≤Dstop / sag11<0.9 is satisfied, so that the variable aperture position located on the object side of the first lens 10 is reasonably arranged, which is beneficial to the installation of the variable aperture assembly.

[0150] In some embodiments, the effective focal length of the second lens 20 is f2, and the total effective focal length of the optical imaging lens 100 is f.

[0151] -0.5<f / f2<-0.2.

[0152] It can be understood that, by satisfying -0.5 < f2 / f < -0.2, the ratio of the effective focal length of the second lens 20 to the total effective focal length of the imaging lens can be effectively controlled, the aberration introduced by the first lens 10 can be balanced, and the imaging quality can be improved.

[0153] In some embodiments, the effective focal length of the third lens 20 is f3, and the total effective focal length of the optical imaging lens 100 is f.

[0154] 2.5 < f3 / f < 10.

[0155] It can be understood that, by satisfying 2.5 < f3 / f < 10, the ratio of the effective focal length of the third lens 30 to the total effective focal length of the imaging lens can be effectively controlled, the light can be smoothly transferred to the subsequent lens, the system aberration can be reduced, and the imaging quality can be improved.

[0156] In some embodiments, the distance from the object side of the first lens 10 of the optical imaging lens 100 to the imaging surface in the optical axis direction is TTL, the curvature radius of the object side of the first lens 10 is R11, and the curvature radius of the image side of the sixth lens 60 is R62.

[0157] 10 < TTL / (R62 / R11) < 11.5.

[0158] It can be understood that, by satisfying 10 < TTL / (R62 / R11) < 11.5, the shape of the entrance and exit surfaces of the lens can be effectively balanced, a smaller TTL can be obtained, the lens aberration can be reduced, and the imaging quality can be improved.

[0159] In some embodiments, the maximum half field of view of the optical imaging lens 100 is HFOV.

[0160] EPDmax*tan(HFOV) > 2.9.

[0161] It can be understood that, by satisfying EPDmax*tan(HFOV) > 2.9, the optical imaging lens 100 can have a larger aperture, and the imaging effect of the optical imaging lens 100 in a dark environment can be improved.

[0162] In some embodiments, the distance from the object side of the first lens 10 of the optical imaging lens 100 to the imaging surface in the optical axis direction is TTL, and half of the diagonal length of the effective pixel area on the imaging surface of the photographic lens is ImgH.

[0163] TTL / ImgH ≤ 1.4.

[0164] It can be understood that, by satisfying TTL / ImgH ≤ 1.4, the TTL of the lens can be effectively lowered, and the module can be miniaturized.

[0165] In some embodiments, the effective focal length of the first lens 10 is f1, the effective focal length of the sixth lens 60 is f6, the radius of curvature of the object side surface of the first lens 10 is R11, and the radius of curvature of the image side surface of the sixth lens 60 is R62;

[0166] 4.5 < f1 / R11-f6 / R62 < 5.

[0167] It can be understood that, by satisfying 4.5 < f1 / R11-f6 / R62 < 5, the effective focal lengths and the lens shapes of the first lens 10 and the sixth lens 60 can be effectively constrained, the optical powers of the two lenses can be reasonably distributed, the system aberration can be balanced, and thus the system imaging quality can be improved.

[0168] In some embodiments, the effective focal length of the first lens 10 is f1, the effective focal length of the fourth lens 40 is f4, and the effective focal length of the fifth lens 50 is f5;

[0169] -1 < f1 / (f4+f5) < 0.

[0170] It can be understood that, by satisfying -1 < f1 / (f4+f5) < 0, the optical powers of the first lens 10, the fourth lens 40, and the fifth lens 50 can be reasonably distributed, the system aberration can be balanced, and the system imaging quality can be improved.

[0171] In some embodiments, the central thickness of the second lens 20 on the optical axis is CT2, the central thickness of the third lens 30 on the optical axis is CT3, and the distance between the image side surface of the second lens 20 and the object side surface of the third lens 30 on the optical axis is DT23;

[0172] 1.5 < (CT2+CT3) / DT23 < 2.5.

[0173] It can be understood that, by satisfying 1.5 < (CT2+CT3) / DT23 < 2.5, the structural distribution of the second lens 20 and the third lens 30 can be more reasonable, which is beneficial to the assembly of the imaging lens.

[0174] In some embodiments, the central thickness of the fourth lens 40 on the optical axis is CT4, the central thickness of the fifth lens 50 on the optical axis is CT5, and the central thickness of the sixth lens 60 on the optical axis is CT6;

[0175] 1.3 < (CT4) / (CT5-CT6) < 2.

[0176] It can be understood that, by satisfying 1.3 < (CT4) / (CT5-CT6) < 2, the structures of the fourth lens 40, the fifth lens 50, and the sixth lens 60 can be more uniform and reasonable, which is beneficial to the processing and molding of the lenses.

[0177] In some embodiments, the maximum distance from the intersection of the object side of the fifth lens 50 with the optical axis to any point on the object side of the fifth lens 50 in the direction of the optical axis is Sag51, the maximum distance from the intersection of the image side of the sixth lens 60 with the optical axis to any point on the image side of the sixth lens 60 in the direction of the optical axis is Sag62, the central thickness of the fifth lens 50 in the direction of the optical axis is CT5, and the central thickness of the sixth lens 60 in the direction of the optical axis is CT6;

[0178] 1<|Sag51 / CT5|+|Sag62 / CT6||<2.

[0179] It can be understood that satisfying 1<|Sag51 / CT5|+|Sag62 / CT6||<2 can make the surface shape of the fifth lens 50 and the sixth lens 60 smoother, which is beneficial to the processing and forming of the lens. At the same time, the field curvature of the imaging lens can be effectively balanced.

[0180] In some embodiments, the maximum distance from the object side surface of the first lens 10 to the image side surface of the sixth lens 60 in the direction of the optical axis is Td, and the sum of the thicknesses of all the lenses of the optical imaging lens 100 in the direction of the optical axis is ∑CT.

[0181] 1.5<Td / ∑CT<1.8.

[0182] It can be understood that satisfying 1.5<Td / ∑CT<1.8 is helpful for the spatial arrangement of the imaging lens lens group, and reduces the volume and total length of the imaging lens lens group to meet the miniaturization requirement.

[0183] In some embodiments, the object side surface of the third lens 30 is a convex surface, and the image side surface of the third lens 30 is a convex surface; or,

[0184] The object side surface of the third lens 30 is a convex surface, and the image side surface of the third lens 30 is a concave surface. The object side surface of the fourth lens 40 is a convex surface; or,

[0185] The object side surface of the fourth lens 40 is a concave surface.

[0186] Embodiment one

[0187] Please refer to FIGS. 4 to 9, which show the first embodiment of the optical imaging lens 100 of the present application.

[0188] In this embodiment, the optical imaging lens 100 includes, in order from the object side A to the image side B, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60, a total of six lenses with refractive power, a variable aperture 30, and an image plane 40.

[0189] The first lens 10 has positive refractive power. The object side E11 of the first lens 10 is a convex surface, and the image side E12 of the first lens 10 is a concave surface. The object side E11 and the image side E12 of the first lens 10 are both aspherical surfaces, but are not limited thereto.

[0190] The second lens 20 has negative refractive power. The object side E21 of the second lens 20 is a convex surface, and the image side E22 of the second lens 20 is a concave surface. The object side E21 and the image side E22 of the second lens 20 are both aspherical surfaces, but are not limited thereto.

[0191] The third lens 30 has positive refractive power. The object side E31 of the third lens 30 is a convex surface, and the image side E32 of the third lens 30 is a convex surface. The object side E31 and the image side E32 of the third lens 30 are both aspherical surfaces, but are not limited thereto.

[0192] The fourth lens 40 has negative refractive power. The object side E41 of the fourth lens 40 is a convex surface, and the image side E42 of the fourth lens 40 is a concave surface. The object side E41 and the image side E42 of the fourth lens 40 are both aspherical surfaces, but are not limited thereto.

[0193] The fifth lens 50 has positive refractive power. The object side E51 of the fifth lens 50 is a convex surface, and the image side E52 of the fifth lens 50 is a convex surface. The object side E51 and the image side E52 of the fifth lens 50 are both aspherical surfaces, but are not limited thereto.

[0194] The sixth lens 60 has negative refractive power. The object side E61 of the sixth lens 60 is a convex surface, and the image side E62 of the sixth lens 60 is a concave surface. The object side E61 and the image side E62 of the sixth lens 60 are both aspherical surfaces, but are not limited thereto.

[0195] In the optical imaging lens 100 of the present embodiment, the object side A and the image side B of each lens from the first lens 10 to the second lens 20 are a total of twelve curved surfaces. If each curved surface is an aspherical surface, these aspherical surfaces are defined by the following formula:

[0196] wherein:

[0197] Y represents the perpendicular distance of a point on the aspherical curved surface from the optical axis I;

[0198] Z represents the depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface at a distance Y from the optical axis I and a tangent plane at the vertex of the aspherical surface on the optical axis I);

[0199] R represents the radius of curvature of the lens surface near the optical axis I;

[0200] K is the conic constant;

[0201] a i is the i-th aspherical surface coefficient.

[0202] The optical data of the optical imaging lens 100 of the first embodiment is shown in FIG. 4, and the aspherical surface data is shown in FIG. 5. In the optical imaging lens 100 of the present embodiment, the ratio of the focal length to the entrance pupil diameter (f-number) of the overall optical imaging lens 100 is FNO, the entrance pupil diameter of the optical imaging lens 100 is EPD, the field of view (FOV) is HFOV, the total effective focal length of the optical imaging lens 100 is f, the distance between the object side E11 of the first lens 10 and the image plane 40 in the direction of the optical axis I is TTL, wherein the units of the image height, the radius of curvature, the thickness and the focal length of the optical imaging lens 100 are all millimeters (mm). In the present embodiment, f = 5.89 mm; HFOV = 40.8°; FNO = 1.68-2.78.

[0203] and (EPDmax-EPDmin) / EPDmax = 0.39; f / f2 = -0.46; f3 / f = 6.9; TTL / (R62 / R11) = 10.10; EPDmax*tan(HFOV) = 3.01; Dstop / sag11 = 0.38; TTL / ImagH = 1.40; f1 / R11-f6 / R62 = 4.71; F1 / (F4+F5) = -0.17; (CT2+CT3) / DT23 = 1.88; (CT4) / (CT5-CT6) = 1.81; |Sag51 / CT5|+|Sag62 / CT6| = 1.42; Td / ∑CT = 1.72.

[0204] The astigmatic field curves of the optical imaging lens 100 of the present embodiment in the large aperture state on the image plane 40 are shown in FIG. 6, and the distortion aberration of the optical imaging lens 100 in the large aperture state on the image plane 40 is shown in FIG. 7; the astigmatic field curves of the optical imaging lens 100 of the present embodiment in the small aperture state on the image plane 40 are shown in FIG. 8, and the distortion aberration of the optical imaging lens 100 in the small aperture state on the image plane 40 is shown in FIG. 9.

[0205] Embodiment Two

[0206] Please refer to FIGS. 10-15, which show the second embodiment of the optical imaging lens 100 of the present application.

[0207] In the present embodiment, the optical imaging lens 100 comprises, sequentially arranged in the direction from the object side A to the image side B, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50 and a sixth lens 60, a total of six lenses with refractive power, a variable aperture 30 and an image plane 40.

[0208] The first lens 10 has positive refractive power. The object side surface E11 of the first lens 10 is a convex surface, and the image side surface E12 of the first lens 10 is a concave surface. The object side surface E11 and the image side surface E12 of the first lens 10 are both aspherical surfaces, but are not limited thereto.

[0209] The second lens 20 has negative refractive power. The object side surface E21 of the second lens 20 is a convex surface, and the image side surface E22 of the second lens 20 is a concave surface. The object side surface E21 and the image side surface E22 of the second lens 20 are both aspherical surfaces, but are not limited thereto.

[0210] The third lens 30 has positive refractive power. The object side surface E31 of the third lens 30 is a convex surface, and the image side surface E32 of the third lens 30 is a convex surface. The object side surface E31 and the image side surface E32 of the third lens 30 are both aspherical surfaces, but are not limited thereto.

[0211] The fourth lens 40 has negative refractive power. The object side surface E41 of the fourth lens 40 is a convex surface, and the image side surface E42 of the fourth lens 40 is a concave surface. The object side surface E41 and the image side surface E42 of the fourth lens 40 are both aspherical surfaces, but are not limited thereto.

[0212] The fifth lens 50 has positive refractive power. The object side surface E51 of the fifth lens 50 is a convex surface, and the image side surface E52 of the fifth lens 50 is a convex surface. The object side surface E51 and the image side surface E52 of the fifth lens 50 are both aspherical surfaces, but are not limited thereto.

[0213] The sixth lens 60 has negative refractive power. The object side surface E61 of the sixth lens 60 is a convex surface, and the image side surface E62 of the sixth lens 60 is a concave surface. The object side surface E61 and the image side surface E62 of the sixth lens 60 are both aspherical surfaces, but are not limited thereto.

[0214] The optical data of the optical imaging lens 100 of the second embodiment is shown in FIG. 9, and the aspheric surface data is shown in FIG. 10. In the optical imaging lens 100 of the present embodiment, the ratio (f-number) of the focal length of the overall optical imaging lens 100 to the incident pupil diameter is FNO, the entrance pupil diameter of the optical imaging lens 100 is EPD, the field of view (FOV) is HFOV, the total effective focal length of the optical imaging lens 100 is f, the distance between the object side E11 of the first lens 10 and the image plane 40 in the direction of the optical axis I is TTL, wherein the units of the image height, the curvature radius, the thickness and the focal length of the optical imaging lens 100 are all millimeters (mm). In the present embodiment, f = 5.66 mm; HFOV = 41.6°; FNO = 1.68-2.80.

[0215] and (EPDmax-EPDmin) / EPDmax = 0.40; f / f2 = -0.37; f3 / f = 3.95; TTL / (R62 / R11) = 11.10; EPDmax*tan(HFOV) = 2.99; Dstop / sag11 = 0.74; TTL / ImagH = 1.40; f1 / R11-f6 / R62 = 4.82; F1 / (F4+F5) = -0.30; (CT2+CT3) / DT23 = 2.15; (CT4) / (CT5-CT6) = 1.50; |Sag51 / CT5|+|Sag62 / CT6| = 1.03; Td / ∑CT = 1.60.

[0216] The astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image plane 40 in the large aperture state are shown in FIG. 12, and the distortion aberration of the optical imaging lens 100 on the image plane 40 in the large aperture state is shown in FIG. 13; the astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image plane 40 in the small aperture state are shown in FIG. 14, and the distortion aberration of the optical imaging lens 100 on the image plane 40 in the small aperture state is shown in FIG. 15.

[0217] Embodiment Three

[0218] Please refer to FIGS. 16-21, which show a third embodiment of the optical imaging lens 100 of the present application.

[0219] In the present embodiment, the optical imaging lens 100 comprises, sequentially arranged in the direction from the object side A to the image side B, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50 and a sixth lens 60, a total of six lenses with refractive power, a variable aperture 30 and an image plane 40.

[0220] The first lens 10 has positive refractive power. The object side surface E11 of the first lens 10 is a convex surface, and the image side surface E12 of the first lens 10 is a concave surface. The object side surface E11 and the image side surface E12 of the first lens 10 are both aspherical surfaces, but are not limited thereto.

[0221] The second lens 20 has negative refractive power. The object side surface E21 of the second lens 20 is a convex surface, and the image side surface E22 of the second lens 20 is a concave surface. The object side surface E21 and the image side surface E22 of the second lens 20 are both aspherical surfaces, but are not limited thereto.

[0222] The third lens 30 has positive refractive power. The object side surface E31 of the third lens 30 is a convex surface, and the image side surface E32 of the third lens 30 is a convex surface. The object side surface E31 and the image side surface E32 of the third lens 30 are both aspherical surfaces, but are not limited thereto.

[0223] The fourth lens 40 has negative refractive power. The object side surface E41 of the fourth lens 40 is a convex surface, and the image side surface E42 of the fourth lens 40 is a concave surface. The object side surface E41 and the image side surface E42 of the fourth lens 40 are both aspherical surfaces, but are not limited thereto.

[0224] The fifth lens 50 has positive refractive power. The object side surface E51 of the fifth lens 50 is a convex surface, and the image side surface E52 of the fifth lens 50 is a convex surface. The object side surface E51 and the image side surface E52 of the fifth lens 50 are both aspherical surfaces, but are not limited thereto.

[0225] The sixth lens 60 has negative refractive power. The object side surface E61 of the sixth lens 60 is a convex surface, and the image side surface E62 of the sixth lens 60 is a concave surface. The object side surface E61 and the image side surface E62 of the sixth lens 60 are both aspherical surfaces, but are not limited thereto.

[0226] The optical data of the optical imaging lens 100 of the third embodiment is shown in FIG. 16, and the aspheric surface data is shown in FIG. 17. In the optical imaging lens 100 of the present embodiment, the ratio (f-number) of the focal length of the overall optical imaging lens 100 to the incident pupil diameter is FNO, the entrance pupil diameter of the optical imaging lens 100 is EPD, the field of view (FOV) is HFOV, the total effective focal length of the optical imaging lens 100 is f, the distance between the object side E11 of the first lens 10 and the image surface 40 in the direction of the optical axis I is TTL, wherein the units of the image height, the curvature radius, the thickness and the focal length of the optical imaging lens 100 are all millimeters (mm). In the present embodiment, f = 5.89 mm; HFOV = 40.8°; FNO = 1.68-2.78.

[0227] and (EPDmax-EPDmin) / EPDmax = 0.40; f / f2 = -0.44; f3 / f = 8.08; TTL / (R62 / R11) = 10.44; EPDmax*tan(HFOV) = 2.98; Dstop / sag11 = 0.20; TTL / ImagH = 1.40; f1 / R11-f6 / R62 = 4.77; F1 / (F4+F5) = -0.16; (CT2+CT3) / DT23 = 1.55; (CT4) / (CT5-CT6) = 1.91; |Sag51 / CT5|+|Sag62 / CT6| = 1.38; Td / ∑CT = 1.73.

[0228] The astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image surface 40 in the large aperture state are shown in FIG. 18; and the distortion aberration of the optical imaging lens 100 on the image surface 40 in the large aperture state is shown in FIG. 19; the astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image surface 40 in the small aperture state are shown in FIG. 20; and the distortion aberration of the optical imaging lens 100 on the image surface 40 in the small aperture state is shown in FIG. 21.

[0229] Embodiment Four

[0230] Please refer to FIGS. 22-27, which show a fourth embodiment of the optical imaging lens 100 of the present application.

[0231] In the present embodiment, the optical imaging lens 100 comprises, sequentially arranged in the direction from the object side A to the image side B, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50 and a sixth lens 60, a total of six lenses with refractive power, a variable aperture 30 and an image plane 40.

[0232] The first lens 10 has positive refractive power. The object side surface E11 of the first lens 10 is a convex surface, and the image side surface E12 of the first lens 10 is a concave surface. The object side surface E11 and the image side surface E12 of the first lens 10 are both aspherical surfaces, but are not limited thereto.

[0233] The second lens 20 has negative refractive power. The object side surface E21 of the second lens 20 is a convex surface, and the image side surface E22 of the second lens 20 is a concave surface. The object side surface E21 and the image side surface E22 of the second lens 20 are both aspherical surfaces, but are not limited thereto.

[0234] The third lens 30 has positive refractive power. The object side surface E31 of the third lens 30 is a convex surface, and the image side surface E32 of the third lens 30 is a convex surface. The object side surface E31 and the image side surface E32 of the third lens 30 are both aspherical surfaces, but are not limited thereto.

[0235] The fourth lens 40 has negative refractive power. The object side surface E41 of the fourth lens 40 is a convex surface, and the image side surface E42 of the fourth lens 40 is a concave surface. The object side surface E41 and the image side surface E42 of the fourth lens 40 are both aspherical surfaces, but are not limited thereto.

[0236] The fifth lens 50 has positive refractive power. The object side surface E51 of the fifth lens 50 is a convex surface, and the image side surface E52 of the fifth lens 50 is a convex surface. The object side surface E51 and the image side surface E52 of the fifth lens 50 are both aspherical surfaces, but are not limited thereto.

[0237] The sixth lens 60 has negative refractive power. The object side surface E61 of the sixth lens 60 is a convex surface, and the image side surface E62 of the sixth lens 60 is a concave surface. The object side surface E61 and the image side surface E62 of the sixth lens 60 are both aspherical surfaces, but are not limited thereto.

[0238] The optical data of the optical imaging lens 100 of the fourth embodiment is shown in FIG. 22, and the aspheric surface data is shown in FIG. 23. In the optical imaging lens 100 of the present embodiment, the ratio (f-number) of the focal length of the overall optical imaging lens 100 to the incident pupil diameter is FNO, the entrance pupil diameter of the optical imaging lens 100 is EPD, the field of view (FOV) is HFOV, the total effective focal length of the optical imaging lens 100 is f, the distance between the object side E11 of the first lens 10 and the image surface 40 in the direction of the optical axis I is TTL, wherein the units of the image height, the curvature radius, the thickness and the focal length of the optical imaging lens 100 are all millimeters (mm). In the present embodiment, f = 5.89 mm; HFOV = 40.8°; FNO = 1.68-2.78.

[0239] and (EPDmax-EPDmin) / EPDmax = 0.41; f / f2 = -0.35; f3 / f = 6.41; TTL / (R62 / R11) = 10.76; EPDmax*tan(HFOV) = 2.98; Dstop / sag11 = 0.82; TTL / ImagH = 1.36; f1 / R11-f6 / R62 = 4.92; F1 / (F4+F5) = -0.18; (CT2+CT3) / DT23 = 1.89; (CT4) / (CT5-CT6) = 1.48; |Sag51 / CT5|+|Sag62 / CT6| = 1.76; Td / ∑CT = 1.70.

[0240] The astigmatic field curves of the optical imaging lens 100 of the present embodiment in the large aperture state on the image surface 40 are shown in FIG. 24; and the distortion aberration of the optical imaging lens 100 in the large aperture state on the image surface 40 is shown in FIG. 25; the astigmatic field curves of the optical imaging lens 100 of the present embodiment in the small aperture state on the image surface 40 are shown in FIG. 26; and the distortion aberration of the optical imaging lens 100 in the small aperture state on the image surface 40 is shown in FIG. 27.

[0241] Embodiment Five

[0242] Please refer to FIGS. 28-33, which show the fifth embodiment of the optical imaging lens 100 of the present application.

[0243] In the present embodiment, the optical imaging lens 100 comprises, sequentially arranged in the direction from the object side A to the image side B, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50 and a sixth lens 60, a total of six lenses with refractive power, a variable aperture 30 and an image plane 40.

[0244] The first lens 10 has positive refractive power. The object side surface E11 of the first lens 10 is a convex surface, and the image side surface E12 of the first lens 10 is a concave surface. The object side surface E11 and the image side surface E12 of the first lens 10 are both aspherical surfaces, but are not limited thereto.

[0245] The second lens 20 has negative refractive power. The object side surface E21 of the second lens 20 is a convex surface, and the image side surface E22 of the second lens 20 is a concave surface. The object side surface E21 and the image side surface E22 of the second lens 20 are both aspherical surfaces, but are not limited thereto.

[0246] The third lens 30 has positive refractive power. The object side surface E31 of the third lens 30 is a convex surface, and the image side surface E32 of the third lens 30 is a concave surface. The object side surface E31 and the image side surface E32 of the third lens 30 are both aspherical surfaces, but are not limited thereto.

[0247] The fourth lens 40 has negative refractive power. The object side surface E41 of the fourth lens 40 is a convex surface, and the image side surface E42 of the fourth lens 40 is a concave surface. The object side surface E41 and the image side surface E42 of the fourth lens 40 are both aspherical surfaces, but are not limited thereto.

[0248] The fifth lens 50 has positive refractive power. The object side surface E51 of the fifth lens 50 is a convex surface, and the image side surface E52 of the fifth lens 50 is a convex surface. The object side surface E51 and the image side surface E52 of the fifth lens 50 are both aspherical surfaces, but are not limited thereto.

[0249] The sixth lens 60 has negative refractive power. The object side surface E61 of the sixth lens 60 is a convex surface, and the image side surface E62 of the sixth lens 60 is a concave surface. The object side surface E61 and the image side surface E62 of the sixth lens 60 are both aspherical surfaces, but are not limited thereto.

[0250] The optical data of the optical imaging lens 100 of the fifth embodiment is shown in FIG. 28, and the aspheric surface data is shown in FIG. 29. In the optical imaging lens 100 of the present embodiment, the ratio (f-number) of the focal length of the overall optical imaging lens 100 to the incident pupil diameter is FNO, the entrance pupil diameter of the optical imaging lens 100 is EPD, the field of view (FOV) is HFOV, the total effective focal length of the optical imaging lens 100 is f, the distance between the object side E11 of the first lens 10 and the image plane 40 in the direction of the optical axis I is TTL, wherein the units of the image height, the curvature radius, the thickness and the focal length of the optical imaging lens 100 are all millimeters (mm). In the present embodiment, f = 5.91 mm; HFOV = 40.3°; FNO = 1.69-2.81.

[0251] and (EPDmax-EPDmin) / EPDmax = 0.40; f / f2 = -0.48; f3 / f = 9.94; TTL / (R62 / R11) = 10.55; EPDmax*tan(HFOV) = 2.95; Dstop / sag11 = 0; TTL / ImagH = 1.40; f1 / R11-f6 / R62 = 4.79; F1 / (F4+F5) = -0.13; (CT2+CT3) / DT23 = 1.73; (CT4) / (CT5-CT6) = 1.74; |Sag51 / CT5|+|Sag62 / CT6| = 1.84; Td / ∑CT = 1.79.

[0252] The astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image plane 40 in the large aperture state are shown in FIG. 30; and the distortion aberration of the optical imaging lens 100 on the image plane 40 in the large aperture state is shown in FIG. 31; the astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image plane 40 in the small aperture state are shown in FIG. 32; and the distortion aberration of the optical imaging lens 100 on the image plane 40 in the small aperture state is shown in FIG. 33.

[0253] Embodiment Six

[0254] Please refer to FIGS. 34-39, which show the sixth embodiment of the optical imaging lens 100 of the present application.

[0255] In the present embodiment, the optical imaging lens 100 comprises, sequentially arranged in the direction from the object side A to the image side B, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50 and a sixth lens 60, a total of six lenses with refractive power, a variable aperture 30 and an image plane 40.

[0256] The first lens 10 has positive refractive power. The object side surface E11 of the first lens 10 is a convex surface, and the image side surface E12 of the first lens 10 is a concave surface. The object side surface E11 and the image side surface E12 of the first lens 10 are both aspherical surfaces, but are not limited thereto.

[0257] The second lens 20 has negative refractive power. The object side surface E21 of the second lens 20 is a convex surface, and the image side surface E22 of the second lens 20 is a concave surface. The object side surface E21 and the image side surface E22 of the second lens 20 are both aspherical surfaces, but are not limited thereto.

[0258] The third lens 30 has positive refractive power. The object side surface E31 of the third lens 30 is a convex surface, and the image side surface E32 of the third lens 30 is a convex surface. The object side surface E31 and the image side surface E32 of the third lens 30 are both aspherical surfaces, but are not limited thereto.

[0259] The fourth lens 40 has negative refractive power. The object side surface E41 of the fourth lens 40 is a concave surface, and the image side surface E42 of the fourth lens 40 is a concave surface. The object side surface E41 and the image side surface E42 of the fourth lens 40 are both aspherical surfaces, but are not limited thereto.

[0260] The fifth lens 50 has positive refractive power. The object side surface E51 of the fifth lens 50 is a convex surface, and the image side surface E52 of the fifth lens 50 is a convex surface. The object side surface E51 and the image side surface E52 of the fifth lens 50 are both aspherical surfaces, but are not limited thereto.

[0261] The sixth lens 60 has negative refractive power. The object side surface E61 of the sixth lens 60 is a convex surface, and the image side surface E62 of the sixth lens 60 is a concave surface. The object side surface E61 and the image side surface E62 of the sixth lens 60 are both aspherical surfaces, but are not limited thereto.

[0262] The optical data of the optical imaging lens 100 of the sixth embodiment are shown in FIG. 34, and the aspherical surface data are shown in FIG. 35. In the optical imaging lens 100 of the present embodiment, the ratio (f-number) of the focal length to the entrance pupil diameter of the overall optical imaging lens 100 is FNO, the entrance pupil diameter of the optical imaging lens 100 is EPD, the field of view (FOV) is HFOV, the total effective focal length of the optical imaging lens 100 is f, the distance between the object side E11 of the first lens 10 and the image plane 40 in the direction of the optical axis I is TTL, wherein the image height of the optical imaging lens 100, the radius of curvature, the thickness and the focal length are all in millimeters (mm). In the present embodiment, f = 5.72 mm; HFOV = 41.3°; FNO = 1.68-2.84.

[0263] and (EPDmax-EPDmin) / EPDmax = 0.41; f / f2 = -0.30; f3 / f = 2.88; TTL / (R62 / R11) = 10.97; EPDmax*tan(HFOV) = 3.04; Dstop / sag11 = 0.76; TTL / ImagH = 1.39; f1 / R11-f6 / R62 = 4.99; F1 / (F4+F5) = -0.67; (CT2+CT3) / DT23 = 1.80; (CT4) / (CT5-CT6) = 1.39; |Sag51 / CT5|+|Sag62 / CT6| = 1.26; Td / ∑CT = 1.70.

[0264] The astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image plane 40 in the large aperture state are shown in FIG. 36, and the distortion aberration of the optical imaging lens 100 on the image plane 40 in the large aperture state is shown in FIG. 37; the astigmatic field curves of the optical imaging lens 100 of the present embodiment on the image plane 40 in the small aperture state are shown in FIG. 38, and the distortion aberration of the optical imaging lens 100 on the image plane 40 in the small aperture state is shown in FIG. 39.

Claims

1. An optical imaging lens, characterized in that, From the object side to the image side, the optical imaging lens comprises: a first lens with positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; a second lens with negative refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; a third lens with positive refractive power, a fourth lens with negative refractive power, the image side surface of the fourth lens is concave; a fifth lens with positive refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex; a sixth lens with negative refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave; The maximum entrance pupil diameter of the optical imaging lens is EPDmax, the minimum entrance pupil diameter of the optical imaging lens is EPDmin, and (EPDmax-EPDmin) / EPDmax>0.35 is met.

2. The optical imaging lens according to claim 1, wherein: The distance between the maximum stop position and the minimum stop position of the optical imaging lens in the direction of the optical axis is Dstop, the maximum distance sag11 between the intersection of the object side surface of the first lens and the optical axis and any point on the object side surface of the first lens in the direction of the optical axis satisfies 0≤Dstop / sag11<0.

9. 3.The optical imaging lens according to claim 1, wherein: The effective focal length of the second lens is f2, and the total effective focal length of the optical imaging lens is f; -0.5<f / f2<-0.

2. ​ 4.The optical imaging lens according to claim 1, wherein: The effective focal length of the third lens is f3, and the total effective focal length of the optical imaging lens is f; 2.5<f3 / f<10. ​ 5.The optical imaging lens according to claim 1, wherein: The distance between the object side surface of the first lens of the optical imaging lens and the imaging surface in the direction of the optical axis is TTL, the radius of curvature of the object side surface of the first lens is R11, and the radius of curvature of the image side surface of the sixth lens is R62; 10<TTL / (R62 / R11)<11.

5.

6. The optical imaging lens according to claim 1, characterized in that: The maximum half field of view of the optical imaging lens is HFOV; EPDmax*tan(HFOV)>2.

9.

7. The optical imaging lens according to claim 1, characterized in that: The distance between the object side surface of the first lens of the optical imaging lens and the imaging surface in the direction of the optical axis is TTL; half of the diagonal length of the effective pixel area on the imaging surface of the photographic lens is ImgH; TTL / ImgH≤1.

4.

8. The optical imaging lens according to claim 1, characterized in that: The effective focal length of the first lens is f1, the effective focal length of the sixth lens is f6, the radius of curvature of the object side surface of the first lens is R11, and the radius of curvature of the image side surface of the sixth lens is R62; 4.5<f1 / R11-f6 / R62<5.

9. The optical imaging lens according to claim 1, characterized in that: The effective focal length of the first lens is f1, the effective focal length of the fourth lens is f4, and the effective focal length of the fifth lens is f5; -1<F1 / (F4+F5)<0.

10. The optical imaging lens according to claim 1, characterized in that: The central thickness of the second lens on the optical axis is CT2, the central thickness of the third lens on the optical axis is CT3, and the distance between the image side surface of the second lens and the object side surface of the third lens on the optical axis is DT23; 1.5<(CT2+CT3) / DT23<2.

5.

11. The optical imaging lens according to claim 1, characterized in that: A central thickness of the fourth lens on the optical axis is CT4, a central thickness of the fifth lens on the optical axis is CT5, and a central thickness of the sixth lens on the optical axis is CT6; 1.3 < (CT4) / (CT5-CT6) < 2.

12. The optical imaging lens according to claim 1, characterized in that: A maximum distance of the object-side surface of the fifth lens from the intersection point with the optical axis to any point on the object-side surface of the fifth lens in the direction of the optical axis is Sag51, a maximum distance of the image-side surface of the sixth lens from the intersection point with the optical axis to any point on the image-side surface of the sixth lens in the direction of the optical axis is Sag62, a central thickness of the fifth lens on the optical axis is CT5, and a central thickness of the sixth lens on the optical axis is CT6; 1 < |Sag51 / CT5|+|Sag62 / CT6| < 2.

13. The optical imaging lens according to claim 1, characterized in that: A maximum distance of the object-side surface of the first lens from the image-side surface of the sixth lens on the optical axis is Td, and a sum of the thicknesses of all the lenses of the optical imaging lens on the optical axis is ∑CT; 1.5 < Td / ∑CT < 1.

8.

14. The optical imaging lens according to any of claims 1 to 13, characterized in that: The object-side surface of the third lens is convex, and the image-side surface of the third lens is convex; or, The object-side surface of the third lens is convex, and the image-side surface of the third lens is concave; and / or, The object-side surface of the fourth lens is convex; or The object-side surface of the fourth lens is concave.

15. An image capture module, comprising: The optical imaging lens as claimed in any one of claims 1 to 14, and a variable aperture stop for adjusting the amount of light passing into the optical imaging lens.

16. A terminal device, comprising: The camera module as claimed in claim 15.

Images