Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis: a first lens group having positive optical power, including a first lens having optical power; a second lens group, which comprises, in order from the object side to the image side along the optical axis: a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens having optical power; a flat glass; and a photosensitive element; wherein at least one of the first lens to the sixth lens is configured to be movable relative to the photosensitive element in the direction of the optical axis; and the maximum effective semi-aperture DT51 of the object side surface of the fifth lens and the maximum effective semi-aperture DT32 of the image side surface of the third lens satisfy: 1.5<DT51 / DT32<2.5.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical imaging lens. Background Art

[0002] In recent years, with the upgrading of consumer electronic products and the development of image software functions and video software functions on consumer electronic products, the market demand for camera modules suitable for portable electronic products has gradually increased.

[0003] A camera module is usually provided on a portable device such as a mobile phone to enable the mobile phone to have a camera function. The camera module includes an optical imaging lens, which is usually provided with an electronic photosensitive element and a lens group. The lens group can collect the light on the object side, and the imaging light travels along the optical path of the lens group and irradiates the electronic photosensitive element, and then the electronic photosensitive element converts the light signal into an electrical signal to form image data. It is usually desirable to control the size of the camera module so that it can adapt to the relatively narrow installation space of the portable electronic device.

[0004] However, users use portable electronic products to take photos in various usage scenarios, and conventional camera modules are difficult to meet the requirements of taking photos in different shooting scenarios or taking photos of objects at different object distances.

[0005] In order to meet the needs of miniaturization and satisfy the imaging requirements, an optical imaging lens is needed that can take into account both miniaturization and clear imaging at different object distances. Summary of the invention

[0006] The present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens group with positive optical power, including a first lens with optical power; a second lens group, which includes, in order from the object side to the image side along the optical axis: a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with optical power; a flat glass; and a photosensitive element; wherein at least one of the first to sixth lenses is configured to be movable relative to the photosensitive element in the direction of the optical axis; the effective semi-aperture of each lens in the second to sixth lenses increases in sequence; the maximum effective semi-aperture DT51 of the object side surface of the fifth lens and the maximum effective semi-aperture DT32 of the image side surface of the third lens can satisfy the following: 1.5<DT51 / DT32<2.5.

[0007] In one embodiment, at least one aspherical mirror surface is provided from the object side surface of the first lens to the image side surface of the sixth lens.

[0008] In one embodiment, at least one non-rotationally symmetric aspherical mirror surface is provided from the object side surface of the first lens to the image side surface of the sixth lens.

[0009] In one embodiment, the center thickness CT1 of the first lens on the optical axis and the sum ΣCT of the center thicknesses of the lenses in the first lens group and the second lens group on the optical axis may satisfy: 0.1<CT1 / ΣCT<0.5.

[0010] In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: 1.6<f / EPD<2.6.

[0011] In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens may satisfy: -2<f5 / f6<-0.5.

[0012] In one embodiment, half of the diagonal length ImgH of the effective pixel area on the photosensitive element and the spacing distance TTL from the object side of the first lens to the effective pixel area on the photosensitive element on the optical axis may satisfy: TTL / ImgH<1.5.

[0013] In one embodiment, the maximum effective half-aperture DT41 of the object-side surface of the fourth lens and the maximum effective half-aperture DT51 of the object-side surface of the fifth lens may satisfy: 0.5<DT41 / DT51<1.

[0014] In one embodiment, the optical imaging lens further includes an aperture stop disposed on the object side of the first lens; a distance ST from the aperture stop to the object side surface of the first lens on the optical axis and a center thickness CT1 of the first lens on the optical axis may satisfy: -1<ST / CT1<0.

[0015] In one embodiment, a curvature radius R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens may satisfy: 0.5<R9 / f5<1.5.

[0016] In one embodiment, a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis may satisfy: 0.5<CT2 / CT3<1.

[0017] In one embodiment, a center thickness CT2 of the second lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis may satisfy: 0.8<CT2 / CT4<1.2.

[0018] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens may satisfy: 0.7<f1 / f5<1.3.

[0019] In one embodiment, an axial distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens and a maximum effective half aperture DT52 of the image side surface of the fifth lens may satisfy: -0.3<SAG52 / DT52<0.

[0020] In one embodiment, the Abbe number V3 of the third lens may satisfy: 30<V3<50.

[0021] In one embodiment, the object-side surface of the first lens is convex, and the image-side surface of the second lens is concave.

[0022] In one embodiment, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: -0.5<(R1-R4) / (R1+R4)<0.

[0023] Another aspect of the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens group having positive optical power, including a first lens having optical power; a second lens group including, in order from the object side to the image side along the optical axis: a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens having optical power; a flat glass; and a photosensitive element; wherein at least one of the first to sixth lenses is configured to be movable relative to the photosensitive element in the direction of the optical axis; an on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens and the maximum effective semi-aperture DT52 of the image side surface of the fifth lens can satisfy: -0.3<SAG52 / DT52<0.

[0024] In one embodiment, the center thickness CT1 of the first lens on the optical axis and the sum ΣCT of the center thicknesses of the lenses in the first lens group and the second lens group on the optical axis may satisfy: 0.1<CT1 / ΣCT<0.5.

[0025] In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: 1.6<f / EPD<2.6.

[0026] In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens may satisfy: -2<f5 / f6<-0.5.

[0027] In one embodiment, half of the diagonal length ImgH of the effective pixel area on the photosensitive element and the spacing distance TTL from the object side of the first lens to the effective pixel area on the photosensitive element on the optical axis may satisfy: TTL / ImgH<1.5.

[0028] In one embodiment, the effective semi-aperture of each lens from the second lens to the sixth lens increases sequentially; the maximum effective semi-aperture DT51 of the object side of the fifth lens and the maximum effective semi-aperture DT32 of the image side of the third lens can satisfy: 1.5<DT51 / DT32<2.5.

[0029] In one embodiment, the maximum effective half-aperture DT41 of the object-side surface of the fourth lens and the maximum effective half-aperture DT51 of the object-side surface of the fifth lens may satisfy: 0.5<DT41 / DT51<1.

[0030] In one embodiment, the optical imaging lens further includes an aperture stop disposed on the object side of the first lens; a distance ST from the aperture stop to the object side surface of the first lens on the optical axis and a center thickness CT1 of the first lens on the optical axis may satisfy: -1<ST / CT1<0.

[0031] In one embodiment, a curvature radius R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens may satisfy: 0.5<R9 / f5<1.5.

[0032] In one embodiment, a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis may satisfy: 0.5<CT2 / CT3<1.

[0033] In one embodiment, a center thickness CT2 of the second lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis may satisfy: 0.8<CT2 / CT4<1.2.

[0034] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens may satisfy: 0.7<f1 / f5<1.3.

[0035] In one embodiment, the Abbe number V3 of the third lens may satisfy: 30<V3<50.

[0036] In one embodiment, the object-side surface of the first lens is convex, and the image-side surface of the second lens is concave.

[0037] In one embodiment, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: -0.5<(R1-R4) / (R1+R4)<0.

[0038] The present application uses two groups of lenses, specifically a total of six lenses, and at least one of at least one lens in the first lens group and the second lens group is set to move along the optical axis. Therefore, the lens can achieve the purpose of focusing by moving and fine-tuning this part of the optical elements. The present application can automatically zoom in on objects in different positions, and by reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, the above optical imaging lens has at least one beneficial effect of clear imaging, high resolution, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0040] Figures 1A to 1C A schematic diagram of the structure of the optical imaging lens according to Embodiment 1 of the present application in a state where the object distance is infinite, a state where the object distance is 500 mm, and a state where the object distance is 100 mm;

[0041] FIG. 2A to FIG. 2C They are shown respectively Figures 1A to 1C The axial chromatic aberration curve of the optical imaging lens; FIG. 3A to FIG. 3C They are shown respectively Figures 1A to 1C Astigmatism curve of medium optical imaging lens; FIG. 4A to FIG. 4C They are shown respectively Figures 1A to 1C Distortion curve of the optical imaging lens;

[0042] FIG. 5A to FIG. 5C A schematic diagram showing the structure of the optical imaging lens according to Embodiment 2 of the present application in a state where the object distance is infinite, a state where the object distance is 500 mm, and a state where the object distance is 100 mm;

[0043] FIG. 6A to FIG. 6C They are shown respectively FIG. 5A to FIG. 5C The axial chromatic aberration curve of the optical imaging lens; 7A to 7C They are shown respectively FIG. 5A to FIG. 5C Astigmatism curve of medium optical imaging lens; FIG. 8A to FIG. 8C They are shown respectively FIG. 5A to FIG. 5C Distortion curve of the optical imaging lens;

[0044] 9A to 9C A schematic diagram of the structure of the optical imaging lens according to Embodiment 3 of the present application in a state where the object distance is infinite, a state where the object distance is 500 mm, and a state where the object distance is 100 mm;

[0045] FIG. 10A to FIG. 10C They are shown respectively 9A to 9C The axial chromatic aberration curve of the optical imaging lens; FIG. 11A to FIG. 11C They are shown respectively 9A to 9C Astigmatism curve of medium optical imaging lens; FIG. 12A to FIG. 12C They are shown respectively 9A to 9C Distortion curve of the optical imaging lens;

[0046] FIG. 13A to FIG. 13C A schematic diagram showing the structure of the optical imaging lens according to Embodiment 4 of the present application in a state where the object distance is infinite, a state where the object distance is 500 mm, and a state where the object distance is 100 mm;

[0047] FIG. 14A to FIG. 14C They are shown respectively FIG. 13A to FIG. 13C The axial chromatic aberration curve of the optical imaging lens; FIG. 15A to FIG. 15CThey are shown respectively FIG. 13A to FIG. 13C Astigmatism curve of medium optical imaging lens; FIG. 16A to FIG. 16C They are shown respectively FIG. 13A to FIG. 13C Distortion curve of the optical imaging lens;

[0048] FIG. 17A to FIG. 17C A schematic diagram of the structure of the optical imaging lens according to Embodiment 5 of the present application in a state where the object distance is infinite, a state where the object distance is 500 mm, and a state where the object distance is 100 mm;

[0049] 18A to 18C They are shown respectively FIG. 17A to FIG. 17C The axial chromatic aberration curve of the optical imaging lens; FIG. 19A to FIG. 19C They are shown respectively FIG. 17A to FIG. 17C Astigmatism curve of medium optical imaging lens; FIG. 20A to FIG. 20C They are shown respectively FIG. 17A to FIG. 17C Distortion curve of the optical imaging lens;

[0050] FIG. 21A to FIG. 21C A schematic diagram of the structure of the optical imaging lens according to Embodiment 6 of the present application in a state where the object distance is infinite, a state where the object distance is 500 mm, and a state where the object distance is 100 mm;

[0051] FIG. 22A to FIG. 22C They are shown respectively FIG. 21A to FIG. 21C The axial chromatic aberration curve of the optical imaging lens; FIG. 23A to FIG. 23C They are shown respectively FIG. 21A to FIG. 21C Astigmatism curve of medium optical imaging lens; FIG. 24A to FIG. 24C They are shown respectively FIG. 21A to FIG. 21C Distortion curve of optical imaging lens. DETAILED DESCRIPTION

[0052] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0053] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0054] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0055] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0056] In this article, we define the direction parallel to the optical axis as the Z-axis direction, the direction perpendicular to the Z-axis and located in the meridian plane as the Y-axis direction, and the direction perpendicular to the Z-axis and located in the sagittal plane as the X-axis direction. Unless otherwise specified, in the embodiments of designing free-form surfaces in this article, all parameter symbols (e.g., radius of curvature, etc.) except for the parameter symbols related to the field of view represent characteristic parameter values ​​along the Y-axis direction of the camera lens group. For example, unless otherwise specified, fx represents the radius of curvature of the optical imaging system in the X-axis direction, and fy represents the radius of curvature of the optical imaging system in the Y-axis direction.

[0057] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0058] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0059] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0060] The features, principles and other aspects of the present application are described in detail below.

[0061] The optical imaging lens according to an exemplary embodiment of the present application may include a first lens group, a second lens group, a flat glass and a photosensitive element. Each optical component is arranged along the optical axis from the image side to the object side.

[0062] When the optical imaging lens is installed in other equipment, the photosensitive element is usually connected to a circuit board and fixed, and the flat glass is arranged on the object side of the photosensitive element and is usually fixed. For example, the first lens group is usually also fixed, and at least one of the second lens to the sixth lens is arranged to be movable on the optical axis relative to the photosensitive element.

[0063] In an exemplary embodiment, the first lens group has positive power and includes a first lens. Exemplarily, the first lens may have positive power. Exemplarily, when a plurality of lenses are included in the first lens group, the first lens is a lens closest to the object side.

[0064] In an exemplary embodiment, the second lens group may include, for example, five lenses having optical power, namely, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis. In each lens of the optical imaging lens, any two adjacent lenses may have an air gap between them.

[0065] In an exemplary embodiment, the second lens has positive or negative optical power; the third lens has positive or negative optical power; the fourth lens has positive or negative optical power; the fifth lens has positive or negative optical power; and the sixth lens has positive or negative optical power.

[0066] In example embodiments, the object-side surface of the first lens may be a convex surface, and the image-side surface of the second lens may be a concave surface.

[0067] In an exemplary embodiment, the optical imaging lens may further include at least one aperture. The aperture may be set at an appropriate position as required, for example, between the object side and the first lens group. Exemplarily, the first lens in the first lens group is the lens closest to the object side, and the aperture is set between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation.

[0068] The flat glass can be used to protect the photosensitive element. The photosensitive element is used for imaging, and it can be an electronic photosensitive element. The electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The plane where the effective pixel area of ​​the photosensitive element is located is regarded as the actual imaging surface of the optical imaging lens.

[0069] In an exemplary embodiment, at least one of the first to sixth lenses is configured to be movable in the direction of the optical axis relative to the photosensitive element. The movement can have a continuous stroke and stop at any position in the stroke, or it can be able to stop at several preset positions. Exemplarily, at least one lens of the movable setting can stop at three different positions, so that the optical imaging lens has an object distance of infinity, an object distance of 500mm, and an object distance of 100mm. Exemplarily, a plurality of lenses of the movable setting are fixedly connected to each other, and the plurality of lenses move synchronously. Exemplarily, a lens of the movable setting moves relatively independently from another lens. Specifically, the lens of the movable setting can be a sliding setting along the optical axis, or it can be moved in other ways but so that the lens has multiple relatively fixed positions on the optical axis. Through the movement of the lens, the optical imaging lens provided by the present application can realize the autofocus function, and at the same time, the focal length surface of each lens is matched, so that the overall structure is more compact.

[0070] In an exemplary embodiment, the effective semi-aperture of each lens in the second to sixth lenses increases sequentially.

[0071] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.5<DT51 / DT32<2.5, wherein DT51 is the maximum effective semi-aperture of the object side of the fifth lens, and DT32 is the maximum effective semi-aperture of the image side of the third lens. Satisfying 1.5<DT51 / DT32<2.5, the effective semi-aperture of the fifth lens and the effective semi-aperture of the third lens may be reasonably allocated, thereby controlling the size of the optical imaging lens in the radial direction of the optical axis, which helps to achieve a compact structure. More specifically, DT51 and DT32 may satisfy: 1.50<DT51 / DT32<2.25.

[0072] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.1<CT1 / ∑CT<0.5, wherein CT1 is the center thickness of the first lens on the optical axis, and ∑CT is the sum of the center thickness of each lens in the first lens group and the second lens group on the optical axis. Exemplarily, ∑CT is the sum of the center thickness of each lens in the first lens to the sixth lens on the optical axis, ∑CT=CT1+CT2+CT3+CT4+CT5+CT6, and the meanings of CT2 to CT6 refer to CT1. Satisfying 0.1<CT1 / ∑CT<0.5 can achieve a better balance between the ratio of the center thickness of the first lens and the sum of the center thicknesses of the six lenses, and make the structure of the optical imaging lens more compact. More specifically, CT1 and ∑CT can satisfy: 0.17<CT1 / ∑CT<0.37.

[0073] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.6<f / EPD<2.6, where f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. The optical imaging lens satisfying 1.6<f / EPD<2.6 has a reasonable aperture range. More specifically, f and EPD may satisfy: 1.8<f / EPD<2.1.

[0074] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula -2<f5 / f6<-0.5, where f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens. Satisfying -2<f5 / f6<-0.5 can reasonably allocate the optical power of the fifth lens and the sixth lens, thereby effectively improving the resolution of the optical imaging lens. More specifically, f5 and f6 can satisfy: -1.60<f5 / f6<-0.70.

[0075] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula TTL / ImgH<1.5, wherein TTL is the spacing distance between the object side of the first lens and the effective pixel area on the photosensitive element on the optical axis, and ImgH is half the diagonal length of the effective pixel area on the photosensitive element. Exemplarily, the first lens is the lens closest to the object side in the first lens group. Satisfying TTL / ImgH<1.5 can ensure that the optical imaging lens always has the characteristic of being thin during the focusing process. More specifically, TTL and ImgH may satisfy: TTL / ImgH<1.40.

[0076] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.5<DT41 / DT51<1, wherein DT41 is the maximum effective semi-aperture of the object side of the fourth lens, and DT51 is the maximum effective semi-aperture of the object side of the fifth lens. Satisfying 0.5<DT41 / DT51<1 can reasonably allocate the effective semi-aperture of the fourth lens and the effective semi-aperture of the fifth lens, thereby controlling the size of the optical imaging lens in the radial direction of the optical axis, which helps to achieve structural compactness and help to achieve miniaturization of the optical imaging lens. More specifically, DT41 and DT51 can satisfy: 0.52<DT41 / DT51<0.77.

[0077] In an exemplary embodiment, when the aperture is set in the object side direction of the first lens, the optical imaging lens of the present application can satisfy the conditional formula -1<ST / CT1<0, where ST is the distance from the aperture to the object side of the first lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis. Satisfying -1<ST / CT1<0 helps to reasonably set the position of the aperture, which can effectively improve the resolution of the optical imaging lens. More specifically, ST and CT1 can satisfy: -0.70<ST / CT1<-0.11.

[0078] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.5<R9 / f5<1.5, where R9 is the radius of curvature of the object side of the fifth lens, and f5 is the effective focal length of the fifth lens. If 0.5<R9 / f5<1.5 is satisfied, the lens shape of the fifth lens may be reasonably set, thereby reducing the chief ray angle. More specifically, R9 and f5 may satisfy: 0.85<R9 / f5<1.20.

[0079] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.5<CT2 / CT3<1, wherein CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. Satisfying 0.5<CT2 / CT3<1 helps the optical imaging lens to achieve a reasonable size distribution, achieve structural compression and miniaturization, and also improve the resolution of the optical imaging lens.

[0080] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.8<CT2 / CT4<1.2, wherein CT2 is the center thickness of the second lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis. Satisfying 0.8<CT2 / CT4<1.2 can reasonably distribute the center thicknesses of the second lens and the fourth lens, thereby helping to compress the structure of the optical imaging lens and improve its resolution. More specifically, CT2 and CT4 can satisfy: 0.85<CT2 / CT4<1.10.

[0081] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.7<f1 / f5<1.3, where f1 is the effective focal length of the first lens and f5 is the effective focal length of the fifth lens. Controlling the effective focal length ratio of the first lens and the fifth lens within this range can effectively improve the resolution and imaging quality of the optical imaging lens. More specifically, f1 and f5 may satisfy: 0.80<f1 / f5<1.10.

[0082] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula -0.3<SAG52 / DT52<0, wherein SAG52 is the on-axis distance between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens, and DT52 is the maximum effective semi-aperture of the image side surface of the fifth lens. Satisfying -0.3<SAG52 / DT52<0 can make the fifth lens have a reasonable lens shape, thereby compressing the size of the optical imaging lens. More specifically, SAG52 and DT52 can satisfy: -0.27<SAG52 / DT52<-0.06.

[0083] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 30<V3<50, where V3 is the Abbe number of the third lens. If 30<V3<50 is satisfied, the material of the third lens may be reasonably set, thereby effectively reducing the chromatic aberration of the optical imaging lens and improving its resolution and imaging quality. More specifically, V3 may satisfy: 37<V3<40.

[0084] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula -0.5<(R1-R4) / (R1+R4)<0, wherein R1 is the radius of curvature of the object side surface of the first lens, and R4 is the radius of curvature of the image side surface of the second lens. Satisfying -0.5<(R1-R4) / (R1+R4)<0 can enable the lens to have a reasonable shape and structure combination, and thus the optical imaging lens has a high resolution. More specifically, R1 and R4 may satisfy: -0.42<(R1-R4) / (R1+R4)<-0.12. Exemplarily, in this embodiment, the object side surface of the first lens is a convex surface, and the image side surface of the second lens is a concave surface.

[0085] The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the six lenses mentioned above. By reasonably allocating the optical focal length, surface shape, center thickness of each lens, and axial spacing between lenses, etc., the volume of the optical imaging lens can be effectively reduced, the sensitivity of the optical imaging lens can be reduced, and the processability of the optical imaging lens can be improved, so that the optical imaging lens is more conducive to production and processing and can be applied to portable electronic products. At the same time, the optical imaging lens of the present application also has excellent optical properties such as clear imaging and high resolution. When the optical imaging lens is used to shoot subjects in different positions, the purpose of focusing can be achieved by fine-tuning some optical elements, and the imaging quality is good.

[0086] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror surface. The characteristic of the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all aspherical mirror surfaces.

[0087] In an exemplary embodiment, the object side surface or the image side surface of at least one of the first to sixth lenses is a non-rotationally symmetric aspherical surface. The non-rotationally symmetric aspherical surface is a rotationally symmetric aspherical surface with a non-rotationally symmetric component added thereto. The non-rotationally symmetric aspherical mirror surface is beneficial for reducing optical distortion and TV distortion, and is beneficial for correcting the off-axis meridian aberration and sagittal aberration of the optical imaging system, thereby improving the imaging quality of the optical imaging system.

[0088] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiments, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0089] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0090] Example 1

[0091] The following reference Figures 1A to 4C An optical imaging lens according to Embodiment 1 of the present application is described. Figures 1A to 1C A schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application is shown when the object distance is in an infinite state, a 500 mm state, and a 100 mm state.

[0092] like Figures 1A to 1C As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a flat glass E7 and an electronic photosensitive element (not shown in the figure). The first lens E1 is used to form a first lens group, and the second lens E2 to the sixth lens E6 are used to form a second lens group. In this embodiment, the fourth lens E4 and the fifth lens E5 are arranged to move along the optical axis. A filter can also be arranged on the image side of the sixth lens E6.

[0093] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0094] The flat glass E7 has an object side surface S13 and an image side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the electronic photosensitive element. Specifically, the plane where the effective pixel area of ​​the electronic photosensitive element is located serves as the actual imaging surface S15 of the optical imaging lens.

[0095] Table 1 shows the basic parameters of the optical imaging lens of Example 1, where the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). OD represents the object distance, T1 represents the distance between the first lens E1 and the second lens E2 on the optical axis, T2, T3, T4, T5 are the same as T1, and T6 represents the distance between the sixth lens E6 and the flat glass E7 on the optical axis.

[0096]

[0097] Table 1

[0098] Table 2 shows the relevant parameters of the optical imaging lens when the object distance is infinite, 500 mm and 100 mm, where the units of TTL, f and ImgH are all millimeters (mm), and “←” indicates the same as the value on the left.

[0099]

[0100]

[0101] Table 2

[0102] According to Table 2, in Example 1, compared with the case where the optical imaging lens is at an object distance of infinity, when the optical imaging lens is at an object distance of 100 mm, the fourth lens E4 and the fifth lens E5 are closer to the first lens E1 on the optical axis. The value of the on-axis distance TTL from the object side surface of the first lens E1 to the imaging surface S15 is always 6.53 mm, the value of half the diagonal length of the effective pixel area on the imaging surface S15 ImgH is always 4.79 mm, and the aperture number Fno satisfies Fno=f / EPD.

[0103] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0104]

[0105] Wherein, z is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below gives the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0106] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.3117E-03 -1.4552E-03 -1.4188E-03 -4.6804E-04 -2.3855E-04 -3.5761E-05 -3.2403E-05 S2 -2.7474E-02 1.0419E-03 -3.7538E-04 -3.9676E-05 -1.7826E-05 -4.9487E-06 2.0323E-06 S3 1.6600E-03 1.2962E-02 -3.1426E-03 -7.3350E-04 -5.2576E-04 -2.3778E-04 -9.4608E-05 S4 3.4323E-02 1.6638E-02 4.4332E-04 8.8751E-05 -2.0719E-04 -1.9800E-04 -1.4136E-04 S5 -1.5483E-01 -1.9447E-03 3.6532E-03 -4.2680E-04 -1.0436E-03 -5.1577E-04 9.8388E-05 S6 -2.0437E-01 -6.4798E-03 4.1471E-03 1.0222E-03 -7.6404E-04 -6.1140E-04 -4.8203E-04 S7 -5.0599E-01 9.8222E-03 -1.8700E-02 -3.4316E-03 -3.9869E-03 -8.9652E-04 3.6697E-04 S8 -7.8558E-01 1.0517E-01 -1.0116E-02 -2.1269E-04 -4.9549E-03 2.6973E-04 1.0902E-03 S9 -9.1173E-01 -1.6986E-02 3.0927E-02 8.1753E-03 -7.9616E-03 -7.1612E-04 9.0317E-04 S10 7.2360E-01 -1.9453E-01 3.9439E-02 1.1144E-02 -7.5482E-03 3.7458E-05 1.2292E-03 S11 -1.6923E+00 5.8277E-01 -1.8977E-01 4.9413E-02 -9.8900E-03 1.6553E-03 2.6147E-04 S12 -5.1237E+00 9.4699E-01 -2.9077E-01 1.2605E-01 -4.4457E-02 1.6874E-02 -5.7661E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.1453E-05 8.3344E-06 1.3112E-05 1.2570E-05 9.9928E-06 2.4793E-06 -6.1252E-06 S2 -1.2099E-06 -2.0350E-07 -1.9489E-07 -5.1080E-08 5.4468E-08 1.8386E-08 -6.0129E-09 S3 -4.2358E-06 1.8999E-05 3.5093E-05 2.7788E-05 2.1244E-05 7.8146E-06 5.0389E-06 S4 -1.0556E-04 -7.0738E-05 -5.6791E-05 -4.5706E-05 -3.9029E-05 -2.3535E-05 -1.3017E-05 S5 1.9529E-04 1.5182E-04 7.0092E-06 -9.9483E-06 -1.2226E-05 3.2668E-08 -1.3436E-06 S6 -3.3039E-04 -7.7287E-05 9.9174E-05 1.9377E-04 1.8506E-04 1.1148E-04 3.8373E-05 S7 8.6688E-04 5.8960E-04 3.6541E-04 9.8788E-05 9.3859E-05 2.0994E-05 2.4514E-05 S8 9.9453E-04 1.6215E-04 -5.1567E-05 -1.2170E-04 7.1194E-05 3.8977E-05 3.7836E-05 S9 1.3018E-04 -1.2170E-04 3.2241E-06 3.1926E-06 1.0612E-06 5.0352E-07 -2.4539E-07 S10 -7.5569E-04 1.7780E-04 7.4656E-07 -1.1466E-05 3.8868E-06 -1.2654E-06 4.9442E-07 S11 -2.8177E-04 4.8538E-05 3.9730E-07 4.9272E-08 -1.3265E-08 -1.2412E-08 -5.3967E-09 S12 3.4467E-03 -1.4009E-03 7.8904E-05 -2.6712E-05 1.8378E-06 1.6992E-07 2.8844E-06

[0107] Table 3

[0108] FIG. 2A to FIG. 2CThe axial chromatic aberration curves of the optical imaging lens of Example 1 when the object distance is infinite, 500 mm and 100 mm are shown, which indicate the deviation of the convergent focus of light of different wavelengths after passing through the lens group. FIG. 3A to FIG. 3C The astigmatism curves of the optical imaging lens of Example 1 in the aforementioned three states are shown, which represent the meridional image curvature and the sagittal image curvature. FIG. 4A to FIG. 4C The distortion curves of the optical imaging lens of Example 1 in the above three states are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figures 2A to 4C It can be seen that the optical imaging lens provided in Example 1 and the camera lens equipped with the optical imaging lens can achieve good imaging quality.

[0109] Example 2

[0110] The following reference FIG. 5A to FIG. 8C The optical imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. FIG. 5A to FIG. 5C The diagram shows a schematic diagram of the structure of an optical imaging lens in three states according to Embodiment 2 of the present application.

[0111] like FIG. 5A to FIG. 5C As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a flat glass E7 and an electronic photosensitive element (not shown in the figure). The first lens E1 is used to form a first lens group, and the second lens E2 to the sixth lens E6 are used to form a second lens group. In this embodiment, the sixth lens E6 is arranged to move along the optical axis. A filter can also be arranged on the image side of the sixth lens E6.

[0112] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0113] The flat glass E7 has an object side surface S13 and an image side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the electronic photosensitive element. Specifically, the plane where the effective pixel area of ​​the electronic photosensitive element is located serves as the actual imaging surface S15 of the optical imaging lens.

[0114] Table 4 shows the basic parameters of the optical imaging lens of Example 2, where the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 5 shows the parameters of the optical imaging lens of Example 2 in the above three states, where the units of TTL, f and ImgH are all in millimeters (mm). Table 6 shows the high-order coefficients that can be used for each aspherical mirror surface in Example 2, where the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0115]

[0116]

[0117] Table 4

[0118] OD endless 500.0000 100.0000 T1 0.2533 ← ← T2 0.2848 ← ← T3 0.2436 ← ← T4 0.4650 ← ← T5 0.8243 0.9189 1.2652 T6 0.7078 0.6130 0.2701 TTL 6.65 ← ← FOV(°) 83.6 84.2 67.1 f 5.23 5.14 4.83 Ih 4.79 ← ←

[0119] Table 5

[0120] In this embodiment, compared with the case where the optical imaging lens is at an object distance of infinity, when the optical imaging lens is at an object distance of 100 mm, the sixth lens E6 is farther away from the first lens E1 on the optical axis.

[0121] Face number A4 A6 A8 A10 A12 A14 A16 S1 5.6323E-03 -1.3911E-03 -1.7053E-03 -8.0875E-04 -3.2762E-04 -4.6040E-05 2.1543E-05 S2 -3.6609E-02 1.1499E-03 7.8915E-05 -7.2416E-05 -1.6547E-05 -1.3050E-04 -4.1413E-06 S3 1.4404E-03 1.5022E-02 -2.5301E-03 -5.9227E-04 -5.6635E-04 -3.6111E-04 6.7673E-05 S4 4.1525E-02 1.8952E-02 2.2231E-05 3.6785E-04 -2.7011E-05 -2.2856E-04 -1.5634E-04 S5 -1.6950E-01 -4.9700E-03 4.3437E-03 -1.1491E-03 -6.5068E-04 -3.2983E-04 -4.1250E-04 S6 -2.6364E-01 -6.3114E-03 1.2798E-02 -2.0595E-03 -2.7310E-03 1.1047E-05 3.7142E-04 S7 -5.8152E-01 5.1036E-03 -2.1839E-02 -4.0192E-03 -4.2126E-03 -1.6571E-03 1.0016E-03 S8 -8.7819E-01 1.4211E-01 -2.5441E-02 -2.2149E-03 -1.5450E-03 -2.1767E-04 7.5063E-04 S9 -1.1399E+00 -5.3249E-02 4.7966E-02 8.5331E-03 -4.6877E-03 2.2025E-04 3.3401E-04 S10 6.7735E-01 -1.6080E-01 4.6446E-02 9.4382E-03 -2.1978E-02 7.1815E-03 5.0823E-04 S11 -1.9918E+00 7.0994E-01 -2.0921E-01 5.3230E-02 -1.2760E-02 2.1649E-03 2.6560E-04 S12 -6.0991E+00 9.2169E-01 -3.7685E-01 1.1768E-01 -4.8195E-02 1.9924E-02 -3.3303E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.4468E-05 -7.9048E-05 -5.8084E-05 4.9596E-06 3.4149E-05 3.0519E-05 -6.0286E-06 S2 2.5904E-05 9.7822E-05 6.4978E-05 3.1247E-05 -2.0863E-05 -1.1788E-05 -9.3568E-06 S3 -6.8649E-05 -5.5237E-05 -6.9369E-05 1.5683E-05 2.2114E-05 2.8399E-05 -5.8122E-06 S4 -1.6481E-05 4.7650E-05 2.2030E-05 -4.5477E-05 -6.9240E-05 -5.6566E-05 -2.0556E-05 S5 1.9934E-04 3.8266E-04 2.0713E-04 -1.6757E-04 -1.6423E-04 -5.7753E-05 3.0791E-05 S6 -3.8047E-04 -5.8182E-04 -1.2497E-05 3.3515E-04 3.6636E-04 1.4280E-04 3.2698E-05 S7 1.1285E-03 7.0566E-04 3.3357E-04 1.5067E-04 1.0197E-04 5.8528E-05 4.1931E-05 S8 5.5753E-04 2.9416E-04 -2.8668E-05 -1.0936E-04 -1.4009E-04 -6.5711E-05 -1.3913E-05 S9 -6.1156E-05 2.5993E-04 -1.2905E-04 -1.3588E-05 -6.9923E-05 3.6380E-05 1.3996E-05 S10 1.0453E-03 1.9123E-03 8.1309E-04 9.1145E-04 2.9277E-04 -1.5448E-06 2.0000E-07 S11 -2.9744E-04 5.2680E-05 2.5274E-06 5.7048E-07 1.2436E-07 -3.0207E-08 -5.7300E-08 S12 6.2853E-03 1.5106E-03 9.8338E-04 7.0839E-04 2.7157E-05 2.8052E-04 -3.9925E-04

[0122] Table 6

[0123] FIG. 6A to FIG. 6C The axial chromatic aberration curves of the optical imaging lens of Example 2 when the object distance is infinite, 500 mm and 100 mm are shown, which indicate the deviation of the convergent focus of light of different wavelengths after passing through the lens group. 7A to 7C The astigmatism curves of the optical imaging lens of Example 2 in the aforementioned three states are shown, which represent the meridional image curvature and the sagittal image curvature. FIG. 8A to FIG. 8C The distortion curves of the optical imaging lens of Example 2 in the above three states are shown, which represent the distortion magnitude values ​​corresponding to different image heights. 6A to 8C It can be seen that the optical imaging lens provided in Example 2 and the camera lens equipped with the optical imaging lens can achieve good imaging quality.

[0124] Example 3

[0125] The following reference 9A to 12C An optical imaging lens according to Embodiment 3 of the present application is described. 9A to 9C The diagram shows the structure of the optical imaging lens in three states according to Embodiment 3 of the present application.

[0126] like 9A to 9CAs shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a flat glass E7 and an electronic photosensitive element (not shown in the figure). The first lens E1 is used to form a first lens group, and the second lens E2 to the sixth lens E6 are used to form a second lens group. In this embodiment, the fifth lens E5 and the sixth lens E6 are arranged to move along the optical axis, and in this embodiment, the flat glass E7 and the electronic photosensitive element are also arranged to move along the optical axis. A filter can also be provided on the image side of the sixth lens E6.

[0127] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0128] The flat glass E7 has an object side surface S13 and an image side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the electronic photosensitive element. Specifically, the plane where the effective pixel area of ​​the electronic photosensitive element is located serves as the actual imaging surface S15 of the optical imaging lens.

[0129] Table 7 shows the basic parameters of the optical imaging lens of Example 3, where the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 8 shows the parameters of the optical imaging lens in the above three states, where the units of TTL, f and ImgH are all in millimeters (mm). Table 9 shows the high-order coefficients that can be used for each aspherical mirror surface in Example 3, where the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0130]

[0131] Table 7

[0132] OD endless 500.0000 100.0000 T1 0.2229 ← ← T2 0.2502 ← ← T3 0.2757 ← ← T4 0.5542 0.5233 0.3921 T5 0.8479 ← ← T6 0.6614 0.6939 0.8598 TTL 6.62 ← 6.65 FOV(°) 84.2 88.1 89.0 f 5.14 4.85 4.81 Ih 4.79 ← ←

[0133] Table 8

[0134] In this embodiment, compared with the case where the optical imaging lens is in a state where the object distance is infinite, when the optical imaging lens is in a state where the object distance is 100 mm, the fifth lens E5 and the sixth lens E6 are closer to the first lens E1 on the optical axis. Compared with the case where the optical imaging lens is in a state where the object distance is infinite, when the optical imaging lens is in a state where the object distance is 100 mm, the imaging plane S15 is farther from the first lens E1 on the optical axis.

[0135] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.0201E-03 8.8475E-04 -2.4784E-03 -4.0181E-04 -4.7458E-04 1.2030E-04 -9.8110E-05 S2 -3.5937E-02 1.3715E-03 6.2265E-04 -8.2781E-05 1.6578E-04 -1.5474E-04 6.6009E-05 S3 -5.9289E-04 1.5106E-02 -2.8625E-03 -1.8337E-04 -7.2110E-04 -2.4915E-04 -4.4471E-05 S4 4.1527E-02 1.5815E-02 2.0855E-04 5.6120E-04 -2.2377E-04 -1.8302E-04 -8.1110E-05 S5 -1.5996E-01 -7.2388E-03 4.4182E-03 -4.8273E-04 -9.3878E-04 -4.9106E-04 -2.2754E-04 S6 -2.5641E-01 -4.3408E-03 1.2416E-02 -1.8231E-03 -2.7942E-03 -2.9831E-04 7.3152E-04 S7 -5.6121E-01 1.2252E-02 -1.9272E-02 -4.6867E-03 -4.9952E-03 -1.4572E-03 1.4773E-03 S8 -8.1999E-01 1.1104E-01 -3.5294E-02 3.2765E-03 5.0428E-04 6.6955E-04 -5.8643E-04 S9 -1.0258E+00 -4.1590E-02 8.0965E-03 4.7797E-03 -2.2367E-03 2.0320E-03 3.0682E-03 S10 7.4847E-01 -1.5039E-01 4.7039E-02 1.8706E-02 -1.4880E-02 -1.5814E-03 -2.0013E-03 S11 -1.7863E+00 6.5219E-01 -2.0830E-01 5.4675E-02 -1.0846E-02 1.8176E-03 2.8211E-04 S12 -5.7248E+00 1.1055E+00 -3.9677E-01 1.3746E-01 -4.5397E-02 1.2338E-02 -4.9221E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.3905E-05 -1.0971E-04 3.9326E-05 5.1271E-06 2.8443E-06 -1.9328E-06 2.8919E-05 S2 5.4906E-06 1.2524E-04 1.3769E-05 -4.1756E-05 -1.5487E-04 -1.2903E-04 -9.4086E-05 S3 3.0342E-06 -5.3690E-05 -4.8080E-05 -2.9841E-05 4.0302E-05 4.4358E-05 2.7417E-05 S4 4.6731E-05 1.3499E-05 -3.1855E-05 -5.9618E-05 -3.0835E-05 -6.5322E-06 -5.3818E-06 S5 2.4933E-04 3.3664E-04 6.5176E-05 -1.3525E-04 -7.7824E-05 2.3479E-05 4.0406E-05 S6 -3.0798E-04 -4.9290E-04 -2.7135E-04 2.9060E-04 4.3046E-04 2.9673E-04 7.3738E-05 S7 8.6169E-04 9.6888E-04 4.0211E-04 -4.0463E-05 -3.6527E-04 -2.6858E-04 -1.4659E-04 S8 -8.4362E-04 4.3996E-04 7.8645E-04 3.4995E-04 2.7722E-05 -5.4402E-05 -4.5969E-05 S9 1.2513E-03 -1.0317E-03 -3.3182E-04 3.8157E-04 -1.9776E-04 -1.0041E-03 -4.6233E-04 S10 2.4108E-03 -1.1130E-03 1.6533E-04 1.0458E-03 1.0873E-03 -7.4185E-04 -5.7768E-04 S11 -3.1638E-04 5.1297E-05 -1.2911E-06 -6.8211E-07 -1.4413E-07 8.4357E-09 6.3789E-08 S12 2.7305E-03 1.1430E-03 -3.3216E-04 -5.2960E-04 -1.3515E-03 -4.1396E-04 8.1269E-04

[0136] Table 9

[0137] FIG. 10A to FIG. 10C The axial chromatic aberration curves of the optical imaging lens of Example 3 when the object distance is infinite, 500 mm and 100 mm are shown, which indicate the deviation of the convergent focus of light of different wavelengths after passing through the lens group. FIG. 11A to FIG. 11C The astigmatism curves of the optical imaging lens of Example 3 in the aforementioned three states are shown, which represent the meridional image curvature and the sagittal image curvature. FIG. 12A to FIG. 12C The distortion curves of the optical imaging lens of Example 3 in the above three states are shown, which represent the distortion magnitude values ​​corresponding to different image heights. FIG. 10A to FIG. 12C It can be seen that the optical imaging lens provided in Example 3 and the camera lens equipped with the optical imaging lens can achieve good imaging quality.

[0138] Example 4

[0139] The following reference FIG. 13A to FIG. 16C An optical imaging lens according to Embodiment 4 of the present application is described. FIG. 13A to FIG. 13C A schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application is shown when the object distance is in an infinite state, a 500 mm state, and a 100 mm state.

[0140] like FIG. 13A to FIG. 13C As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a flat glass E7 and an electronic photosensitive element (not shown in the figure). The first lens E1 is used to form a first lens group, and the second lens E2 to the sixth lens E6 are used to form a second lens group. In this embodiment, the second lens group is arranged to move along the optical axis, and the flat glass E7 and the electronic photosensitive element are also arranged to move along the optical axis. A filter can also be arranged on the image side of the sixth lens E6.

[0141] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0142] The flat glass E7 has an object side surface S13 and an image side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the electronic photosensitive element. Specifically, the plane where the effective pixel area of ​​the electronic photosensitive element is located serves as the actual imaging surface S15 of the optical imaging lens.

[0143] Table 10 shows the basic parameters of the optical imaging lens assembly of Example 4, where the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 11 shows the parameters of the optical imaging lens in the above three states, where the units of TTL, f and ImgH are all in millimeters (mm). Table 12 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, where the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0144]

[0145] Table 10

[0146] OD endless 500.0000 100.0000 T1 0.1183 0.1449 0.2615 T2 0.5189 ← ← T3 0.1001 ← ← T4 0.5702 ← ← T5 1.0021 ← ← T6 0.5586 ← ← TTL 6.15 6.18 6.30 FOV(°) 84.1 83.2 79.4 f 5.31 5.28 5.14 Ih 4.79 ← ←

[0147] Table 11

[0148] In this embodiment, compared with when the optical imaging lens is in a state of infinity object distance, when the optical imaging lens is in a state of 100 mm object distance, the distance of the second lens group relative to the first lens E1 on the optical axis is farther, and the distance of the imaging surface S15 relative to the first lens E1 on the optical axis is also farther.

[0149] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.2804E-02 -7.4080E-03 -1.0036E-03 -1.3325E-04 -1.9181E-05 -8.1532E-07 -4.1251E-06 S2 -2.7352E-02 5.5988E-04 1.6818E-04 4.1968E-04 2.4155E-05 4.3322E-05 -4.1956E-06 S3 -3.3448E-03 8.5547E-04 -8.6391E-04 4.4628E-04 1.0981E-04 1.1665E-04 4.4554E-05 S4 3.8907E-03 2.1490E-03 -2.8191E-04 1.2852E-04 -4.7956E-05 3.3460E-05 -1.6323E-05 S5 -2.8239E-02 -1.8053E-02 2.7330E-03 -2.0076E-04 -7.3970E-05 -5.4140E-05 -1.4301E-05 S6 -1.3720E-01 -2.6432E-02 -2.3510E-03 6.7699E-04 -8.5323E-04 -2.1899E-04 -6.8707E-05 S7 -3.9995E-01 3.0971E-03 -2.0472E-02 -1.6666E-03 -4.8950E-03 5.8706E-04 2.1200E-03 S8 -6.4308E-01 1.3491E-01 -1.1305E-02 1.7787E-03 -6.0789E-03 -1.4963E-04 5.2038E-04 S9 -1.2223E+00 -8.8444E-02 1.9364E-01 -2.5613E-04 -4.4146E-02 -1.1007E-02 2.1955E-02 S10 6.1753E-01 -2.9678E-01 1.2842E-01 -2.5211E-02 1.8470E-02 5.1433E-03 -9.4321E-03 S11 -2.1224E+00 1.1005E+00 -5.5996E-01 1.7780E-01 -7.2778E-02 -1.1894E-02 -1.6573E-02 S12 -6.2819E+00 1.2044E+00 -3.9781E-01 1.8519E-01 -7.2950E-02 2.9594E-02 -1.7723E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 7.8102E-06 -2.4821E-06 1.6800E-06 -2.4675E-06 3.6774E-06 -2.3810E-06 4.8522E-07 S2 6.7483E-06 2.1735E-06 -6.4201E-06 4.6098E-06 2.1536E-06 -2.8141E-06 7.1659E-07 S3 5.3482E-05 3.2807E-05 1.7686E-05 -7.9556E-07 -5.2828E-06 -8.3350E-06 2.6620E-06 S4 1.0579E-05 -7.6039E-06 4.9103E-06 -2.6079E-06 8.2463E-07 1.6167E-07 -1.0951E-07 S5 2.3893E-05 2.5523E-05 1.0819E-05 2.7047E-06 -3.7897E-06 -6.3344E-07 8.5684E-07 S6 -4.8282E-05 2.8895E-05 -1.0360E-05 1.7131E-05 -6.3564E-06 -5.2497E-06 3.1621E-06 S7 1.1181E-03 5.9012E-04 9.8383E-05 6.1648E-05 -6.0581E-05 -1.7263E-05 -3.1651E-05 S8 -1.1916E-03 -2.2462E-04 2.8793E-04 5.1292E-04 1.6178E-04 4.1023E-05 -3.9774E-05 S9 7.7782E-03 -8.8562E-03 -7.5972E-03 1.7789E-03 5.1241E-03 3.1735E-03 7.3026E-04 S10 -1.0580E-02 1.0076E-03 4.6473E-03 1.9629E-03 1.3949E-03 1.2880E-03 1.7591E-04 S11 -4.6480E-03 -1.2323E-02 -2.7400E-03 -3.3594E-03 -3.0425E-03 -5.3703E-05 -9.8858E-04 S12 8.2491E-03 -2.1617E-03 1.3789E-03 -7.4042E-04 2.3804E-04 -2.2011E-04 7.2247E-05

[0150] Table 12

[0151] FIG. 14A to FIG. 14C The axial chromatic aberration curves of the optical imaging lens of Example 4 when the object distance is infinite, 500 mm and 100 mm are shown, which indicate the deviation of the convergent focus of light of different wavelengths after passing through the lens group. FIG. 15A to FIG. 15CThe astigmatism curves of the optical imaging lens of Example 4 in the aforementioned three states are shown, which represent the meridional image curvature and the sagittal image curvature. FIG. 16A to FIG. 16C The distortion curves of the optical imaging lens of Example 4 in the above three states are shown, which represent the distortion magnitude values ​​corresponding to different image heights. FIG. 14A to FIG. 16C It can be seen that the optical imaging lens provided in Example 4 and the camera lens equipped with the optical imaging lens can achieve good imaging quality.

[0152] Example 5

[0153] The following reference FIG. 17A to FIG. 20C An optical imaging lens according to Embodiment 5 of the present application is described. FIG. 17A to FIG. 17C A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0154] like FIG. 17A to FIG. 17C As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a flat glass E7 and an electronic photosensitive element (not shown in the figure). The first lens E1 is used to form a first lens group, and the second lens E2 to the sixth lens E6 are used to form a second lens group. In this embodiment, the third lens E3 to the electronic photosensitive element are arranged to move along the optical axis. A filter can also be arranged on the image side of the sixth lens E6.

[0155] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0156] The flat glass E7 has an object side surface S13 and an image side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the electronic photosensitive element. Specifically, the plane where the effective pixel area of ​​the electronic photosensitive element is located serves as the actual imaging surface S15 of the optical imaging lens.

[0157] Table 13 shows the basic parameters of the optical imaging lens of Example 5, where the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 14 shows the relevant parameters of the optical imaging lens when the object distance is infinity, 500 mm and 100 mm. Table 15 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, where the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0158]

[0159] Table 13

[0160]

[0161]

[0162] Table 14

[0163] In this embodiment, compared with the case where the optical imaging lens is at an infinite object distance, when the optical imaging lens is at an object distance of 100 mm, the third lens E3 is farther away from the first lens E1 on the optical axis.

[0164] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.7651E-02 -6.4211E-03 -1.2732E-03 2.0754E-04 4.5761E-05 1.6113E-04 -1.6755E-05 S2 -3.1379E-02 1.3399E-03 4.2888E-04 3.0189E-04 1.8505E-04 -1.2045E-04 -1.8020E-05 S3 -2.1360E-04 1.0175E-03 -8.8895E-04 3.5140E-04 4.0047E-04 3.0075E-06 -3.8030E-05 S4 5.5607E-03 2.7654E-03 -5.7983E-04 -2.3152E-05 -3.1015E-05 1.6014E-05 -1.0982E-05 S5 -2.3703E-02 -1.4936E-02 1.7263E-03 -7.0027E-04 -5.2620E-04 3.1538E-04 -8.6038E-05 S6 -1.4044E-01 -2.8519E-02 -2.5248E-03 4.7966E-04 -1.1944E-03 -3.3900E-04 -6.8651E-05 S7 -4.0749E-01 1.3791E-03 -1.9184E-02 -1.3655E-03 -4.7378E-03 5.2013E-04 2.1950E-03 S8 -6.4192E-01 1.3303E-01 -1.4942E-02 1.2628E-03 -5.6786E-03 -6.9657E-05 1.0630E-03 S9 -1.1909E+00 -9.7893E-02 1.9964E-01 -3.5492E-03 -4.4076E-02 -1.1032E-02 2.2766E-02 S10 6.8285E-01 -3.0551E-01 1.1631E-01 -1.9666E-02 1.6250E-02 7.7796E-03 -1.4222E-02 S11 -2.1570E+00 1.1007E+00 -5.4952E-01 1.8217E-01 -7.5326E-02 -1.1896E-02 -1.7396E-02 S12 -6.2383E+00 1.2152E+00 -3.9261E-01 1.8709E-01 -7.2418E-02 2.9497E-02 -1.7648E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.0551E-05 -9.0963E-05 -2.3067E-05 1.4058E-05 5.3536E-05 3.5675E-05 3.3333E-05 S2 2.6296E-05 4.1951E-05 5.3352E-07 3.5532E-06 -2.1923E-06 7.5522E-06 5.5197E-07 S3 -5.9497E-05 -6.5456E-06 2.2506E-06 1.0847E-05 -1.9302E-08 -5.1857E-06 -5.3452E-06 S4 5.3798E-06 -7.4292E-06 -7.2733E-06 -1.6905E-06 -1.4616E-06 4.6235E-07 5.3591E-07 S5 7.4168E-05 -1.0448E-04 1.6085E-05 -2.3236E-05 3.5443E-05 8.4996E-06 2.1073E-05 S6 -5.0349E-05 6.2332E-05 -2.6741E-05 2.8842E-05 -1.7043E-06 -2.0035E-06 -5.4207E-07 S7 9.7179E-04 4.9324E-04 1.6785E-04 1.7655E-04 1.3057E-06 -3.8367E-05 -3.5036E-05 S8 -1.3379E-03 -4.3099E-04 2.5033E-04 4.3780E-04 1.9087E-04 7.6877E-05 6.6901E-05 S9 7.5765E-03 -9.0832E-03 -7.9205E-03 2.2539E-03 5.0764E-03 3.2449E-03 5.8340E-04 S10 -7.6337E-03 9.9879E-04 4.1194E-03 1.0156E-03 1.9798E-03 2.2007E-03 1.7271E-04 S11 -4.5960E-03 -1.3036E-02 -2.1460E-03 -3.0515E-03 -3.0048E-03 4.3125E-05 -1.2444E-03 S12 8.2058E-03 -2.2755E-03 1.2583E-03 -7.0118E-04 1.0438E-04 -2.0529E-04 1.0690E-04

[0165] Table 15

[0166] 18A to 18C The axial chromatic aberration curves of the optical imaging lens of Example 5 when the object distance is infinite, 500 mm and 100 mm are shown, which indicate the deviation of the convergent focus of light of different wavelengths after passing through the lens group. FIG. 19A to FIG. 19C The astigmatism curves of the optical imaging lens of Example 5 in the aforementioned three states are shown, which represent the meridional image curvature and the sagittal image curvature. FIG. 20A to FIG. 20C The distortion curves of the optical imaging lens of Example 5 in the above three states are shown, which represent the distortion magnitude values ​​corresponding to different image heights. FIG. 18A to FIG. 20C It can be seen that the optical imaging lens provided in Example 5 and the camera lens equipped with the optical imaging lens can achieve good imaging quality.

[0167] Example 6

[0168] The following reference FIG. 21A to FIG. 24C An optical imaging lens according to Embodiment 6 of the present application is described. FIG. 21A to FIG. 21C A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0169] like FIG. 21A to FIG. 21CAs shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a flat glass E7 and an electronic photosensitive element (not shown in the figure). The first lens E1 is used to form a first lens group, and the second lens E2 to the sixth lens E6 are used to form a second lens group. In this embodiment, the fourth lens E4 and the fifth lens E5 are arranged to move along the optical axis. A filter can also be arranged on the image side of the sixth lens E6.

[0170] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0171] The flat glass E7 has an object side surface S13 and an image side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the electronic photosensitive element. Specifically, the plane where the effective pixel area of ​​the electronic photosensitive element is located serves as the actual imaging surface S15 of the optical imaging lens.

[0172] Table 16 shows the basic parameters of the optical imaging lens of Example 6, where the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 17 shows the relevant parameters of the optical imaging lens when the object distance is infinity, 500 mm and 100 mm. Table 18 shows the coefficients of the high-order terms S1 to S11 in each mirror surface that can be used in Example 6, where each aspherical surface shape can be defined by the formula (1) given in the above Example 1.

[0173]

[0174] Table 16

[0175]

[0176]

[0177] Table 17

[0178] In this embodiment, compared with the case where the optical imaging lens is at an object distance of infinity, when the optical imaging lens is at an object distance of 100 mm, the fourth lens E4 is closer to the first lens E1 on the optical axis.

[0179] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.4005E-03 -1.8207E-03 -1.3477E-03 -5.3314E-04 -1.9666E-04 -2.9881E-05 4.8589E-06 S2 -3.2869E-02 1.4520E-03 -5.6466E-04 -7.4665E-05 -2.0805E-05 -3.7961E-06 -4.6778E-06 S3 1.4115E-03 1.5088E-02 -3.8940E-03 -6.7750E-04 -3.0977E-04 -1.8138E-04 -7.5723E-05 S4 4.1107E-02 2.0400E-02 5.0888E-04 3.8226E-05 -2.6280E-04 -3.0083E-04 -1.7758E-04 S5 -1.8674E-01 -1.8081E-03 4.9900E-03 -3.5374E-04 -1.4758E-03 -6.6211E-04 2.0064E-04 S6 -2.4608E-01 -8.8240E-03 5.5723E-03 1.2130E-03 -9.0886E-04 -6.4379E-04 -6.1023E-04 S7 -6.0963E-01 1.1021E-02 -2.1252E-02 -3.8475E-03 -5.2107E-03 -8.9014E-04 2.0114E-04 S8 -1.0118E+00 1.2475E-01 -1.1242E-02 -2.1296E-04 -6.5768E-03 8.4908E-04 1.3194E-03 S9 -1.0744E+00 -2.2910E-02 3.3308E-02 7.9474E-03 -1.1161E-02 -1.8561E-03 -1.5693E-04 S10 8.3961E-01 -2.3373E-01 4.4909E-02 1.9637E-02 -1.1817E-02 -1.9700E-03 1.0855E-03 S11 -2.0711E+00 6.9574E-01 -2.2660E-01 6.1221E-02 -1.2096E-02 1.3848E-03 5.0534E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 8.5214E-06 -6.5626E-06 -1.0750E-05 -1.3576E-05 -1.6128E-05 -1.3951E-05 -6.7418E-06 S2 -1.2076E-06 -3.1135E-07 -3.1369E-08 -1.9921E-08 1.0116E-07 3.9167E-08 -3.9769E-09 S3 -8.4035E-05 -3.9588E-05 -2.7201E-05 1.5203E-06 1.7659E-06 5.1139E-06 -3.8113E-06 S4 -1.4011E-04 -8.6905E-05 -7.8919E-05 -5.8879E-05 -5.0352E-05 -2.8359E-05 -1.2459E-05 S5 4.0393E-04 2.1560E-04 -1.8106E-05 -8.3242E-05 -5.1319E-05 -9.0207E-06 2.0941E-06 S6 -3.7285E-04 -1.1057E-04 1.4978E-04 2.6292E-04 2.1271E-04 1.0159E-04 2.1505E-05 S7 8.2892E-04 6.7293E-04 4.7368E-04 2.5792E-04 1.3071E-04 3.4899E-05 7.8109E-06 S8 1.1749E-03 3.7641E-04 9.6867E-05 9.0995E-06 2.1737E-05 2.0085E-06 5.5080E-06 S9 -1.7552E-03 -8.5033E-04 -4.0291E-04 2.4716E-05 -6.8987E-05 -2.5428E-05 -3.9491E-05 S10 -1.6620E-03 8.4504E-04 8.9061E-04 8.7954E-04 6.4494E-04 3.5067E-04 8.9472E-05 S11 -5.6320E-04 5.7573E-05 -9.3123E-05 1.2905E-04 -1.7008E-05 -7.7000E-05 5.6584E-05

[0180] Table 18

[0181] It can also be seen from Table 16 that the image-side surface S12 of the sixth lens E6 is a non-rotationally symmetric aspherical surface (i.e., an AAS surface). The surface shape of the non-rotationally symmetric aspherical surface can be defined by, but not limited to, the following non-rotationally symmetric aspherical surface formula:

[0182]

[0183] Among them, z 12 It is the vector height of the surface parallel to the Z axis; CUX and CUY are the curvatures of the vertex of the surface in the X and Y axis directions respectively (the curvature is the inverse of the curvature radius); KX and KY are the cone coefficients in the X and Y axis directions respectively; AR, BR, CR, DR, ER, FR, GR, HR, and JR are the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th order coefficients in the rotational symmetric components of the non-spherical surface respectively; AP, BP, CP, DP, EP, FP, GP, HP, and JP are the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th order coefficients in the non-rotational symmetric components of the non-spherical surface respectively. Table 19 below gives the rotational symmetric components of the non-rotationally symmetric non-spherical surface S12 that can be used in Example 1 and the various high-order coefficients of the non-rotational symmetric components.

[0184] AAS side AR BR CR DR ER FR GR HR JR S12 -8.9400E-02 2.3150E-02 -4.5649E-03 6.4176E-04 -6.1949E-05 3.9497E-06 -1.5769E-07 3.5579E-09 -3.4536E-11 AAS side AP BP CP DP EP FP GP HP JP S12 -1.1352E-03 -7.5070E-04 -2.2403E-04 -2.2605E-05 1.6476E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0185] Table 19

[0186] FIG. 22A to FIG. 24C The axial chromatic aberration curves of the optical imaging lens of Example 6 when the object distance is infinite, 500 mm and 100 mm are shown, which indicate the deviation of the convergent focus of light of different wavelengths after passing through the lens group. FIG. 22A to FIG. 22C The astigmatism curves of the optical imaging lens of Example 6 in the aforementioned three states are shown, which represent the meridional image curvature and the sagittal image curvature. FIG. 23A to FIG. 23C The distortion curves of the optical imaging lens of Example 6 in the above three states are shown, which represent the distortion magnitude values ​​corresponding to different image heights. FIG. 22A to FIG. 24C It can be seen that the optical imaging lens provided in Example 6 and the camera lens equipped with the optical imaging lens can achieve good imaging quality.

[0187] In summary, Examples 1 to 6 satisfy the relationships shown in Table 20 and Table 21, respectively, where “↑” indicates the same value as the previous cell.

[0188] Conditional formula\Example 1 2 3 4 5 6 CT1 / ∑CT 0.26 0.22 0.19 0.35 0.34 0.28 f5 / f6 -1.22 -0.91 -0.74 -1.54 -1.04 -1.24 DT51 / DT32 2.22 1.90 2.06 1.55 1.61 1.95 DT41 / DT51 0.54 0.61 0.58 0.75 0.74 0.60 ST / CT1 -0.68 -0.59 -0.60 -0.21 -0.14 -0.62 R9 / f5 0.87 0.89 0.87 1.16 1.16 0.89 CT2 / CT3 0.83 0.80 0.55 0.98 0.82 0.96 CT2 / CT4 1.01 1.04 1.00 0.95 1.07 0.90 f1 / f5 0.92 1.03 1.08 0.82 0.96 0.94 SAG52 / DT52 -0.14 -0.09 -0.11 -0.18 -0.25 -0.11 V3 37.30 37.30 37.30 37.30 37.30 37.30 (R1-R4) / (R1+R4) -0.40 -0.36 -0.35 -0.32 -0.15 -0.39

[0189] Table 20

[0190]

[0191] Table 21

[0192] The present application provides a camera module, which may be an independent imaging device such as a digital camera, or a module integrated in a mobile electronic device such as a mobile phone, etc. The camera module is equipped with the optical imaging lens described above.

[0193] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: A first lens group having positive optical power, including a first lens having positive optical power; a second lens group, comprising, in order from the object side to the image side along the optical axis: a second lens having negative optical power, a third lens having positive optical power or negative optical power, a fourth lens having positive optical power or negative optical power, a fifth lens having positive optical power, and a sixth lens having negative optical power; Flat glass; and Photosensitive element; Wherein, at least one of the first lens to the sixth lens is arranged to be movable relative to the photosensitive element in the direction of the optical axis; the effective semi-aperture of each lens from the second lens to the sixth lens increases in sequence; The maximum effective half-aperture DT51 of the object side of the fifth lens and the maximum effective half-aperture DT32 of the image side of the third lens satisfy: 1.5<DT51 / DT32<2.25; The number of lenses having optical power in the optical imaging lens is six; The positive and negative properties of the optical power of the third lens and the fourth lens are opposite; The object side surface of the first lens is a convex surface; The image side surface of the second lens is a concave surface; The image side surface of the third lens is a convex surface; The object side surface of the fourth lens is convex, and the image side surface is concave; The object side surface of the fifth lens is convex, and the image side surface is convex; The object side surface of the sixth lens is convex, and the image side surface is concave.

2. The optical imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens on the optical axis and the sum ΣCT of the center thicknesses of the lenses in the first lens group and the second lens group on the optical axis satisfy: 0.17<CT1 / ∑CT<0.

37.

3. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.88≤f / EPD<2.

1.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -1.54≤f5 / f6<-0.

70.

5. The optical imaging lens according to claim 1, wherein: The half of the diagonal length ImgH of the effective pixel area on the photosensitive element and the spacing TTL from the object side of the first lens to the effective pixel area on the photosensitive element on the optical axis satisfy: 1.23≤TTL / ImgH<1.

40.

6. The optical imaging lens according to claim 1, wherein: The maximum effective half-aperture DT41 of the object-side surface of the fourth lens and the maximum effective half-aperture DT51 of the object-side surface of the fifth lens satisfy: 0.52<DT41 / DT51<0.

77.

7. The optical imaging lens according to claim 1, wherein: Also includes a stop disposed on the object side of the first lens; The distance ST from the aperture to the object side surface of the first lens on the optical axis and the center thickness CT1 of the first lens on the optical axis satisfy: -0.7<ST / CT1<-0.

11.

8. The optical imaging lens according to claim 1, wherein: The curvature radius R9 of the object side surface of the fifth lens and the effective focal length f5 of the fifth lens satisfy: 0.85<R9 / f5<1.

20.

9. The optical imaging lens according to claim 1, wherein: The center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy: 0.5<CT2 / CT3<1.

10. The optical imaging lens according to claim 1, wherein: The center thickness CT2 of the second lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.85<CT2 / CT4<1.

10.

11. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 0.80<f1 / f5<1.

10.

12. The optical imaging lens according to claim 1, wherein: The axial distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens and the maximum effective semi-aperture DT52 of the image side surface of the fifth lens satisfy: -0.27<SAG52 / DT52<-0.

06.

13. The optical imaging lens according to any one of claims 1 to 12, characterized in that: The Abbe number V3 of the third lens satisfies: 37＜V3＜40。 14. The optical imaging lens according to any one of claims 1 to 12, characterized in that: The curvature radius R1 of the object side surface of the first lens and the curvature radius R4 of the image side surface of the second lens satisfy: -0.42<(R1-R4) / (R1+R4)<-0.12.

Images