Optical imaging lens

Abstract

The present invention relates to an optical imaging lens, wherein the optical imaging lens comprises a first lens with optical power arranged along an optical axis, a second lens with negative optical power, an aperture, a third lens with optical power, a fourth lens with optical power, a fifth lens with positive optical power and a sixth lens with optical power; the lens satisfies: 3.5<(R5+R6) / (R5-R6)<5.0 and -5.5<SAG42 / SAG11<-3.5. The optical imaging lens adopting this structure can effectively balance and control the low-order aberration of the lens, has the characteristics of ultra-thin, large aperture and small distortion, is suitable for portable electronic products, and is an optical imaging lens with good imaging quality and good adaptability.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging, and in particular to an optical imaging lens, specifically an optical imaging lens composed of six lenses. Background Art

[0002] As electronic products such as smart phones and tablets become more and more popular due to their portable advantages, ultra-thin imaging systems are gradually becoming a trend as consumers demand thinner and lighter electronic products. At the same time, as the performance of CCD and CMOS image sensors improves and their size decreases, consumers also have higher requirements for the performance of imaging lenses, thus developing specifications such as large aperture, high pixel, and miniaturization.

[0003] In order to meet practical needs, there is an urgent need for an optical imaging lens with the characteristics of ultra-thinness, large aperture, small distortion, good imaging quality, suitable for portable electronic products. Summary of the invention

[0004] The present invention aims to provide a six-piece optical imaging lens with good imaging quality, which has the characteristics of ultra-thinness, large aperture, and small distortion and is suitable for portable electronic products.

[0005] One aspect of the present invention provides an optical imaging lens, the optical imaging lens comprising:

[0006] a first lens having optical power;

[0007] a second lens having negative optical power;

[0008] Aperture;

[0009] a third lens having optical power;

[0010] a fourth lens having optical power;

[0011] a fifth lens having positive refractive power;

[0012] a sixth lens having optical power;

[0013] Wherein, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy: 3.5<(R5+R6) / (R5-R6)<5.0;

[0014] The on-axis distance SAG11 between the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens and the on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens satisfy: -5.5<SAG42 / SAG11<-3.5.

[0015] According to one embodiment of the present invention, the maximum field of view FOV of the optical imaging lens satisfies: FOV>90°.

[0016] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<2.5.

[0017] According to one embodiment of the present invention, a distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy: TTL / ImgH<1.6.

[0018] According to one embodiment of the present invention, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens satisfy: 0.5<SAG62 / SAG51<2.0.

[0019] According to an embodiment of the present invention, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 1.5<CT1 / ET1<2.0.

[0020] According to one embodiment of the present invention, the combined focal length f23 of the second lens and the third lens and the effective focal length f1 of the first lens satisfy: -3.0<f23 / f1<-2.0.

[0021] According to one embodiment of the present invention, half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH and the axial distance TD from the object side surface of the first lens to the image side surface of the last lens in the optical imaging lens satisfy: 0.5<ImgH / TD<1.0.

[0022] According to an embodiment of the present invention, an air interval T45 between the fourth lens and the fifth lens on the optical axis and an air interval T56 between the fifth lens and the sixth lens on the optical axis satisfy: 3.7<T56 / T45<8.1.

[0023] According to one embodiment of the present invention, a distance SD from the aperture to the image side surface of the last lens in the optical imaging lens and a sum ∑AT of air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface in the optical imaging lens satisfy: 2.5<SD / ∑AT<3.0.

[0024] According to one embodiment of the present invention, the on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens and the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens satisfy: 2.0<(SAG31+SAG32) / (SAG31-SAG32)<3.5.

[0025] According to an embodiment of the present invention, the effective focal length f4 of the fourth lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: 2.0<f4 / f45<2.5.

[0026] According to one embodiment of the present invention, a curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens satisfy: 2.5<R7 / R8<4.1.

[0027] According to one embodiment of the present invention, the combined focal length f345 of the third lens, the fourth lens and the fifth lens and the effective focal length f of the optical imaging lens satisfy the following relationship: 1.0<f345 / f<1.5.

[0028] According to one embodiment of the present invention, the absolute value of optical distortion |OPD| of the optical imaging lens satisfies: |OPD|<1.5%.

[0029] Beneficial effects of the present invention:

[0030] The optical imaging lens provided by the present invention comprises a plurality of lenses, such as a first lens to a sixth lens, wherein the low-order aberrations of the lens can be effectively balanced and controlled by reasonably controlling the positive and negative distribution of the optical power of each lens in the lens. The optical imaging lens has the characteristics of ultra-thinness, large aperture, and small distortion, is suitable for portable electronic products, and is an optical imaging lens with good imaging quality and good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 Schematic diagram of the structure of the lens of the optical imaging lens embodiment 1 of the present invention;

[0033] Figure 1a to Figure 1d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the lens of the optical imaging lens embodiment 2 of the present invention;

[0035] Figure 2a to Figure 2d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 2 of the optical imaging lens of the present invention;

[0036] Figure 3 Schematic diagram of the structure of the lens of the optical imaging lens embodiment 3 of the present invention;

[0037] Figures 3a to 3d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 3 of the optical imaging lens of the present invention;

[0038] Figure 4 Schematic diagram of the structure of the lens of the optical imaging lens embodiment 4 of the present invention;

[0039] Figures 4a to 4d They are respectively the axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 4 of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] 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 invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0042] 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.

[0043] 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.

[0044] In the description of the present invention, 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.

[0045] 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 way unless explicitly defined in this article.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] Exemplary Embodiments

[0048] The optical imaging lens of an exemplary embodiment of the present invention includes six lenses, which include, in order from the object side to the image side along the optical axis: a first lens, a second lens, an aperture, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein each lens is independent of each other and has an air gap between each lens on the optical axis.

[0049] In this exemplary embodiment, the first lens has a focal power; the second lens has a negative focal power; the third lens has a focal power; the fourth lens has a focal power; the fifth lens has a positive focal power; and the sixth lens has a focal power. By reasonably controlling the positive and negative distribution of the focal powers of the various lenses of the optical imaging lens, the low-order aberrations of the optical imaging lens can be effectively balanced and controlled.

[0050] In this exemplary embodiment, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy the conditional formula: 3.5<(R5+R6) / (R5-R6)<5.0. This design can reduce the sensitivity of tolerance by controlling the curvature radius ratio of the third lens and maintain the miniaturization of the optical imaging lens. More specifically, R5 and R6 satisfy: 3.7<(R5+R6) / (R5-R6)<4.8, for example, 3.9≤(R5+R6) / (R5-R6)≤4.78.

[0051] In this exemplary embodiment, the on-axis distance SAG11 between the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens and the on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens satisfy the condition: -5.5<SAG42 / SAG11<-3.5. By reasonably controlling this ratio, the inclination angle of the image side surface of the fourth lens and the object side surface of the first lens can be effectively controlled to reduce the risk of ghost images between the fourth lens and the first lens. More specifically, SAG42 and SAG11 satisfy: -6.0<SAG42 / SAG11<-4.0, for example, -6.84≤SAG42 / SAG11≤-4.43.

[0052] In this exemplary embodiment, the maximum field of view FOV of the optical imaging lens satisfies the condition: FOV>90°. By optimizing the optical imaging lens, the maximum field of view of the optical imaging lens is greater than 90°, thereby achieving the wide-angle characteristic of the optical imaging lens. More specifically, FOV satisfies: FOV>92°, for example, FOV≥93.7°.

[0053] In this exemplary embodiment, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the conditional formula: f / EPD<2.5. By allocating the focal power of the optical imaging lens, the F number of the optical imaging lens is made less than 2.5, completing the large aperture feature of the optical imaging lens. More specifically, f and EPD satisfy: f / EPD<2.3, for example, f / EPD≤2.04.

[0054] In this exemplary embodiment, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy the condition: TTL / ImgH<1.6. The ultra-thin feature of the optical imaging lens is achieved by constraining the ratio of the total length of the optical imaging lens to half of the diagonal length of the effective pixel area on the imaging surface to be less than 1.6. More specifically, TTL and ImgH satisfy: TTL / ImgH<1.5, for example, TTL / ImgH≤1.44.

[0055] In this exemplary embodiment, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens satisfy the condition: 0.5<SAG62 / SAG51<2.0. By reasonably controlling this ratio, the inclination angles of the object side surface of the fifth lens and the image side surface of the sixth lens can be effectively controlled to reduce the risk of ghost images between the fifth lens and the sixth lens. More specifically, SAG62 and SAG51 satisfy: 0.6<SAG62 / SAG51<1.8, for example, 0.89≤SAG62 / SAG51≤1.62.

[0056] In this exemplary embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy the conditional formula: 1.5<CT1 / ET1<2.0. By controlling the ratio of the center thickness and the edge thickness of the first lens, the thickness ratio of the first lens can be controlled to prevent the problem of the first lens being too thick or too thin during the design process, thereby ensuring the processing feasibility of the first lens. More specifically, CT1 and ET1 satisfy: 1.6<CT1 / ET1<1.95, for example, 1.74≤CT1 / ET1≤1.91.

[0057] In this exemplary embodiment, the combined focal length f23 of the second lens and the third lens and the effective focal length f1 of the first lens satisfy the conditional formula: -3.0<f23 / f1<-2.0. By constraining the ratio of the combined focal length of the second lens and the third lens to the effective focal length of the first lens within a certain range, the field curvature of the optical imaging lens can be reasonably controlled within a certain range. More specifically, f23 and f1 satisfy: -2.80<f23 / f1<-2.10, for example, -2.76≤f23 / f1≤-2.19.

[0058] In this exemplary embodiment, the conditional formula satisfied by half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH and the axial distance TD from the object side of the first lens to the image side of the last lens in the optical imaging lens is: 0.5<ImgH / TD<1.0. By constraining the ratio of the half diagonal length of the effective pixel area on the imaging plane to the axial distance from the object side of the first lens to the image side of the last lens, the field of view size is effectively controlled to obtain better imaging quality. More specifically, ImgH and TD satisfy: 0.6<ImgH / TD<0.98, for example, 0.88≤ImgH / TD≤0.95.

[0059] In this exemplary embodiment, the air interval T45 between the fourth lens and the fifth lens on the optical axis and the air interval T56 between the fifth lens and the sixth lens on the optical axis satisfy the condition: 3.7<T56 / T45<8.1. By constraining the ratio of the air interval between the fifth lens and the sixth lens to the air interval between the fourth lens and the fifth lens, the field curvature contribution of each field of view can be controlled within a reasonable range. More specifically, T56 and T45 satisfy: 3.73<T56 / T45<8.07, for example, 3.76≤T56 / T45≤8.03.

[0060] In this exemplary embodiment, the distance SD from the aperture to the image side surface of the last lens in the optical imaging lens and the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface in the optical imaging lens ∑AT satisfy the condition: 2.5<SD / ∑AT<3.0. By controlling the ratio of the distance from the aperture to the image side surface of the last lens and the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface, the distortion contribution of each field of view of the optical imaging lens is controlled within a reasonable range to improve the imaging quality. More specifically, SD and ∑AT satisfy: 2.6<SD / ∑AT<2.9, for example, 2.61≤SD / ∑AT≤2.88.

[0061] In this exemplary embodiment, the on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens and the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens satisfies the condition: 2.0<(SAG31+SAG32) / (SAG31-SAG32)<3.5. By constraining the ratio of the on-axis distance between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens and the on-axis distance between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens, the inclination angle of the third lens is effectively controlled, and the refraction angle of the light beam in the third lens is effectively controlled. More specifically, SAG31 and SAG32 satisfy: 2.3<(SAG31+SAG32) / (SAG31-SAG32)<3.49, for example, 2.37≤(SAG31+SAG32) / (SAG31-SAG32)≤3.49.

[0062] In this exemplary embodiment, the effective focal length f4 of the fourth lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy the conditional formula: 2.0<f4 / f45<2.5. By constraining the ratio of the combined focal length of the fourth lens and the fifth lens to the effective focal length of the fourth lens within a certain range, the field curvature of the optical imaging lens can be reasonably controlled within a certain range. More specifically, f4 and f45 satisfy: 2.10<f4 / f45<2.45, for example, 2.19≤f4 / f45≤2.39.

[0063] In this exemplary embodiment, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy the conditional formula: 2.5<R7 / R8<4.1. By controlling the curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface of the fourth lens within a certain range, the deflection angle of the edge light of the optical imaging lens can be reasonably controlled, and the sensitivity of the optical imaging lens can be effectively reduced. More specifically, R7 and R8 satisfy: 2.6<R7 / R8<3.6, for example, 2.71≤R7 / R8≤3.35.

[0064] In this exemplary embodiment, the combined focal length f345 of the third lens, the fourth lens, and the fifth lens and the effective focal length f of the optical imaging lens satisfy the conditional formula: 1.0<f345 / f<1.5. By constraining the ratio of the combined focal length of the third lens, the fourth lens, and the fifth lens to the effective focal length of the optical imaging lens within a certain range, the field curvature of the optical imaging lens can be reasonably controlled within a certain range. More specifically, f345 and f satisfy: 1.10<f345 / f<1.4, for example, 1.12≤f345 / f≤1.18.

[0065] In this exemplary embodiment, the absolute value of the optical distortion |OPD| of the optical imaging lens satisfies the condition: |OPD|<1.5%. By constraining the optical distortion of the imaging lens to be less than 1.5%, the optical imaging lens has the characteristic of small distortion.

[0066] Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0067] The optical imaging lens according to the above embodiment of the present invention can use multiple lenses, such as the above six lenses. By reasonably allocating the focal length, surface shape, center thickness of each lens, and the on-axis spacing between each lens, the optical imaging lens has the characteristics of ultra-thinness, large aperture, and small distortion, and is an optical imaging lens with good imaging quality suitable for portable electronic products.

[0068] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the sixth lens is an aspherical mirror surface. The characteristics of the aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike the spherical lens with a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side 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 and image side 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.

[0069] 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, and the optical imaging lens may also include other numbers of lenses if necessary.

[0070] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings. Specific embodiment 1

[0072] Figure 1 This is a schematic diagram of the structure of the lens of Embodiment 1 of the optical imaging lens of the present invention, wherein the optical imaging lens comprises: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15, which are arranged in sequence from the object side to the image side along the optical axis. Among them:

[0073] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is convex; the second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave; the third lens E3 has negative power, and its object side surface S5 is convex, and its image side surface S6 is concave; the fourth lens E4 has positive power, and its object side surface S7 is concave, and its image side surface S8 is convex; the fifth lens E5 has positive power, and its object side surface S9 is convex, and its image side surface S10 is convex; the sixth lens E6 has negative power, and its object side surface S11 is convex, and its image side surface S12 is concave; the filter 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 imaging surface S15.

[0074] As shown in Table 1, it is a basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, focal length, thickness / distance are all in millimeters (mm):

[0075]

[0076]

[0077] Table 1

[0078] As shown in Table 2, in Example 1, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 5.24 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=3.59 mm, half of the maximum field angle of the optical imaging lens is Semi-FOV=47.8°, the total effective focal length f of the optical imaging lens is 3.35 mm, the edge thickness ET4 of the fourth lens is 2.04 mm, and the axis between the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens is 1.3 mm. The distance SAG31 is -0.12, the axial distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens is -0.06, the axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens is 0.16, the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens is 0.25, and the absolute value of the optical distortion of the optical imaging lens |OPD| is 0.66%. The parameters of each relational expression are explained as in the exemplary embodiment, and the values ​​of each relational expression are listed in the following table:

[0079]

[0080] Table 2

[0081] The optical imaging lens in Example 1 satisfies:

[0082] (R5+R6) / (R5-R6)=4.62, where R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens;

[0083] SAG42 / SAG11=-6.84, where SAG11 is the on-axis distance between the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens, and SAG42 is the on-axis distance between the intersection of the image side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image side surface of the fourth lens;

[0084] FOV = 95.6, where FOV is the maximum field of view of the optical imaging lens;

[0085] f / EPD=2.04, where f is the effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens;

[0086] TTL / ImgH=1.46, where TTL is the distance from the object side of the first lens to the imaging plane of the optical imaging lens on the optical axis, and ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH;

[0087] SAG62 / SAG51=1.62, wherein SAG51 is the on-axis distance between the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens, and SAG62 is the on-axis distance between the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens;

[0088] CT1 / ET1=1.82, where ET1 is the edge thickness of the first lens and CT1 is the center thickness of the first lens on the optical axis;

[0089] f23 / f1=-2.19, where f23 is the combined focal length of the second lens and the third lens, and f1 is the effective focal length of the first lens;

[0090] ImgH / TD=0.91, where ImgH is half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, and TD is the axial distance from the object side of the first lens to the image side of the last lens in the optical imaging lens;

[0091] T56 / T45=3.76, wherein T45 is the air interval between the fourth lens and the fifth lens on the optical axis, and T56 is the air interval between the fifth lens and the sixth lens on the optical axis;

[0092] SD / ∑AT=2.61, where SD is the distance from the aperture to the image side of the last lens in the optical imaging lens, and ∑AT is the sum of the air intervals on the optical axis between any two adjacent lenses having optical power from the first lens to the lens closest to the imaging surface in the optical imaging lens;

[0093] (SAG31+SAG32) / (SAG31-SAG32)=3.49, wherein SAG31 is the on-axis distance between the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens, and SAG32 is the on-axis distance between the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens;

[0094] f4 / f45=2.39, where f4 is the effective focal length of the fourth lens, and f45 is the combined focal length of the fourth lens and the fifth lens;

[0095] R7 / R8=2.71, where R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens;

[0096] f345 / f=1.12, wherein f345 is the combined focal length of the third lens, the fourth lens and the fifth lens, and f is the effective focal length of the optical imaging lens.

[0097] 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:

[0098]

[0099] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0100] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 3 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspherical mirror surfaces S1-S12 in Example 1:

[0101] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.9160E-02 -4.9663E-03 -3.1661E-04 2.3395E-04 -1.5836E-05 3.5594E-05 -3.3141E-05 S2 -6.2216E-02 1.0016E-02 -3.1608E-03 1.1866E-03 -2.8637E-04 5.6698E-05 1.6410E-05 S3 -6.2048E-02 1.2237E-02 -4.1529E-03 1.6751E-03 -1.2208E-04 1.6733E-04 -6.4270E-05 S4 -3.1851E-02 1.1543E-03 -3.8906E-04 6.6161E-05 -6.7639E-06 -1.5629E-06 1.8156E-06 S5 -1.6207E-01 -7.1121E-03 2.0585E-04 8.2018E-04 2.1930E-04 7.8752E-05 -4.7838E-05 S6 -2.4069E-01 8.0174E-03 -2.4432E-03 9.7226E-04 1.8036E-04 5.9720E-04 -7.5870E-05 S7 -1.3684E-02 7.9261E-02 -1.5582E-02 2.3749E-04 -5.2639E-04 1.5958E-03 -7.9631E-04 S8 -3.2806E-01 1.6199E-01 3.8245E-02 -1.5029E-02 -3.9988E-03 -4.0198E-03 3.1556E-03 S9 3.3267E-01 -4.1113E-01 2.5260E-01 -7.9228E-02 2.5046E-02 -1.6009E-02 5.6483E-03 S10 1.5220E+00 -7.2138E-01 3.6141E-01 -1.3737E-01 4.9671E-02 -1.9489E-02 1.7240E-03 S11 -2.7983E+00 4.5715E-01 -1.5247E-01 4.0513E-03 -1.0252E-03 -1.1457E-03 -1.8556E-03 S12 -5.9567E+00 1.2328E+00 -4.3011E-01 1.4606E-01 -5.1648E-02 2.2586E-02 -1.2148E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.0895E-05 -7.8174E-06 1.1757E-05 -2.2134E-06 3.2205E-06 -4.4433E-06 1.2031E-06 S2 1.2255E-05 2.7212E-05 2.1021E-05 2.6533E-05 1.3887E-05 1.1495E-05 2.9331E-06 S3 -1.0658E-04 -4.8740E-05 8.2541E-07 3.9235E-05 3.8967E-05 2.7959E-05 5.2065E-06 S4 -3.7042E-06 1.3586E-06 1.3647E-07 -3.2637E-07 -2.5852E-07 2.8085E-08 8.1934E-08 S5 8.5819E-06 -5.4797E-06 6.3196E-06 -2.8679E-06 8.9183E-07 0.0000E+00 0.0000E+00 S6 8.2317E-05 -3.5717E-05 1.4165E-05 -1.3470E-05 3.5592E-08 0.0000E+00 0.0000E+00 S7 1.3266E-04 -2.6099E-05 8.3107E-06 -3.7850E-05 1.4768E-05 7.0249E-06 -2.5044E-06 S8 7.6869E-04 -4.3260E-05 -4.8063E-04 -2.1206E-04 4.5665E-05 7.6489E-05 1.7396E-05 S9 -1.1314E-03 1.5606E-03 -1.2003E-03 4.0368E-04 -1.6436E-04 8.9839E-05 -1.9491E-05 S10 6.7010E-04 -7.5267E-04 8.3132E-04 -5.0089E-04 1.7134E-04 6.4535E-05 -4.7996E-05 S11 -9.3109E-04 1.7350E-03 -9.8406E-04 1.7633E-04 3.5940E-04 1.8802E-04 -1.0085E-04 S12 6.8645E-03 -3.3225E-03 1.2501E-04 -7.3164E-05 5.2628E-04 -1.4921E-04 -1.0977E-05

[0102] Table 3

[0103] Figure 1a The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 1b The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 1c The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 1d The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 1a to Figure 1d It can be seen from the figure that the optical imaging lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0105] Figure 2 This is a schematic diagram of the structure of the lens of Embodiment 2 of the optical imaging lens of the present invention, wherein the optical imaging lens comprises: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15, which are arranged in sequence from the object side to the image side along the optical axis. Among them:

[0106] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave; the second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is convex; the third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave; the fourth lens E4 has positive power, its object side surface S7 is concave, and its image side surface S8 is convex; the fifth lens E5 has positive power, its object side surface S9 is concave, and its image side surface S10 is convex; the sixth lens E6 has negative power, its object side surface S11 is convex, and its image side surface S12 is concave; the filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0107] As shown in Table 4, it is a basic parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, focal length, thickness / distance are all in millimeters (mm):

[0108]

[0109] Table 4

[0110] As shown in Table 5, in Example 2, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 5.14 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=3.58 mm, half of the maximum field of view angle of the optical imaging lens Semi-FOV=47.8°, the total effective focal length f of the optical imaging lens is 3.37 mm, the edge thickness ET4 of the fourth lens is 2.05 mm, and the axis between the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens is 1.3 mm. The distance SAG31 is -0.11, the axial distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens is -0.04, the axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens is 0.04, the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens is 0.04, and the absolute value of the optical distortion of the optical imaging lens |OPD| is 0.86%. The parameters of each relational expression are explained as in the exemplary embodiment, and the values ​​of each relational expression are listed in the following table:

[0111]

[0112] Table 5

[0113] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 6 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspherical mirror surfaces S1 to S12 in Example 2:

[0114]

[0115]

[0116] Table 6

[0117] Figure 2a The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 2b The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2c The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2d The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 2a to Figure 2d It can be seen from the figure that the optical imaging lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0119] Figure 3 This is a schematic diagram of the structure of the lens of Embodiment 3 of the optical imaging lens of the present invention, wherein the optical imaging lens comprises: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15, which are arranged in sequence from the object side to the image side along the optical axis. Among them:

[0120] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave; the second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave; the third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave; the fourth lens E4 has positive power, its object side surface S7 is concave, and its image side surface S8 is convex; the fifth lens E5 has positive power, its object side surface S9 is concave, and its image side surface S10 is convex; the sixth lens E6 has negative power, its object side surface S11 is convex, and its image side surface S12 is concave; the filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0121] As shown in Table 7, it is a basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, focal length, thickness / distance are all in millimeters (mm):

[0122]

[0123] Table 7

[0124] As shown in Table 8, in Example 3, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 5.14 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=3.55 mm, half of the maximum field of view angle of the optical imaging lens Semi-FOV=47.8°, the total effective focal length f of the optical imaging lens is 3.36 mm, the edge thickness ET4 of the fourth lens is 2.05 mm, and the axis between the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens is 1.3 mm. The distance SAG31 is -0.11, the axial distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens is -0.05, the axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens is 0.06, the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens is 0.07, and the absolute value of the optical distortion of the optical imaging lens |OPD| is 1.21%. The parameters of each relational expression are explained as in the exemplary embodiment, and the values ​​of each relational expression are listed in the following table:

[0125]

[0126]

[0127] Table 8

[0128] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 9 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspherical mirror surfaces S1 to S12 in Example 3:

[0129] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.1293E-02 -5.2271E-03 -5.0504E-04 3.3973E-04 7.1191E-05 7.5659E-05 -1.2081E-05 S2 -6.7799E-02 1.1050E-02 -2.0344E-03 9.0669E-04 4.7157E-05 3.9336E-05 2.8179E-05 S3 -5.9758E-02 1.2575E-02 -2.5685E-03 9.8288E-04 -4.4551E-06 1.9422E-05 2.9244E-06 S4 -3.0353E-02 1.2319E-03 -5.1977E-04 8.3414E-05 -1.3121E-05 -7.1621E-06 4.0076E-06 S5 -1.6240E-01 -7.2810E-03 4.0540E-04 8.0477E-04 2.7248E-04 9.6080E-05 -4.6959E-05 S6 -2.4140E-01 8.0312E-03 -1.6279E-03 1.2678E-03 1.3651E-04 7.5421E-04 -1.6282E-04 S7 -1.1803E-02 7.5809E-02 -1.6821E-02 7.3822E-04 -1.3950E-03 2.2369E-03 -1.1640E-03 S8 -3.2085E-01 1.6154E-01 3.6901E-02 -1.5964E-02 -5.0728E-03 -3.5769E-03 3.3256E-03 S9 3.2642E-01 -4.1213E-01 2.5119E-01 -7.9787E-02 2.5038E-02 -1.6088E-02 5.7071E-03 S10 1.5839E+00 -7.4635E-01 3.5173E-01 -1.3847E-01 5.0768E-02 -1.9266E-02 2.3984E-03 S11 -2.8268E+00 5.0757E-01 -1.4769E-01 8.0947E-03 1.3620E-03 -1.2627E-03 -6.1702E-04 S12 -5.9549E+00 1.2406E+00 -4.3123E-01 1.4034E-01 -4.9205E-02 2.2535E-02 -1.1978E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.3539E-05 -1.3770E-05 2.4960E-06 -6.2564E-06 1.4765E-06 -3.2929E-06 3.1382E-06 S2 6.9954E-06 5.7709E-06 -9.7839E-07 -2.9302E-06 -4.7415E-07 1.7063E-06 1.4570E-06 S3 -4.7025E-05 -4.9736E-05 -5.5791E-05 -4.3896E-05 -3.2566E-05 -1.8685E-05 -8.0420E-06 S4 -1.4175E-07 2.7904E-06 1.6202E-06 2.9348E-06 6.5639E-07 -4.9652E-07 -1.4788E-06 S5 -7.8710E-06 -1.3850E-05 -5.8174E-06 -4.2898E-06 -2.6835E-06 0.0000E+00 0.0000E+00 S6 4.7528E-05 -6.8617E-05 8.8891E-06 -1.5232E-05 1.0895E-06 0.0000E+00 0.0000E+00 S7 1.6361E-04 3.9958E-05 -1.7410E-06 -4.9246E-05 8.6272E-06 1.9166E-05 -9.0738E-06 S8 7.9091E-04 -5.6409E-05 -4.5788E-04 -1.1601E-04 4.2218E-05 5.0149E-05 -2.0245E-05 S9 -1.0708E-03 1.5810E-03 -1.1992E-03 4.0178E-04 -1.6795E-04 8.8625E-05 -1.8868E-05 S10 5.9088E-04 -6.3837E-04 8.7111E-04 -5.2023E-04 1.9928E-04 6.6501E-05 -4.7650E-05 S11 -7.0779E-04 1.7844E-03 -1.2447E-03 2.3925E-04 3.6108E-04 1.9397E-04 -1.6825E-04 S12 7.0905E-03 -3.3342E-03 1.5905E-04 -7.0052E-05 5.4092E-04 -1.5634E-04 -1.4141E-05

[0130] Table 9

[0131] Figure 3a The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 3bThe astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 3c The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 3d The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 3a to 3d It can be seen from the figure that the optical imaging lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0133] Figure 4 This is a schematic diagram of the structure of the lens of Embodiment 4 of the optical imaging lens of the present invention, wherein the optical imaging lens comprises: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15, which are arranged in sequence from the object side to the image side along the optical axis. Among them:

[0134] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave; the second lens E2 has negative power, its object side surface S3 is convex, and its image side surface S4 is concave; the third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave; the fourth lens E4 has positive power, its object side surface S7 is concave, and its image side surface S8 is convex; the fifth lens E5 has positive power, its object side surface S9 is convex, and its image side surface S10 is convex; the sixth lens E6 has negative power, its object side surface S11 is convex, and its image side surface S12 is concave; the filter E7 has an object side surface S13 and an image side surface S14. The light from the object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0135] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature, focal length, thickness / distance are all in millimeters (mm):

[0136]

[0137] Table 10

[0138] As shown in Table 11, in Example 4, the distance from the object side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis TTL=5.06 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 ImgH=3.39 mm, half of the maximum field angle of the optical imaging lens Semi-FOV=47.8°, the total effective focal length of the optical imaging lens f=3.20 mm, the edge thickness ET4 of the fourth lens is 2.05 mm, and the axis from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens is 1.37 mm. The on-axis distance SAG31=-0.09, the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens=-0.05, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens=0.13, the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens=0.17, and the absolute value of the optical distortion of the optical imaging lens|OPD|=1.20%. The parameters of each relational expression are explained as in the exemplary embodiment, and the values ​​of each relational expression are listed in the following table:

[0139]

[0140] Table 11

[0141] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 12 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 of the aspherical mirror surfaces S1 to S12 that can be used in Example 4:

[0142]

[0143]

[0144] Table 12

[0145] Figure 4a The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 4b The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4c The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4d The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4a to 4dIt can be seen from the figure that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0146] The optical imaging lens provided by the present invention mentioned in the above embodiments includes multiple lenses, such as the first lens to the sixth lens, wherein the low-order aberrations of the lens can be effectively balanced and controlled by reasonably controlling the positive and negative distribution of the optical power of each lens in the lens. The optical imaging lens has the characteristics of ultra-thinness, large aperture, and small distortion, is suitable for portable electronic products, and is an optical imaging lens with good imaging quality and good adaptability.

[0147] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, It is characterized in that The optical imaging lens has six lenses with optical power, and the optical imaging lens includes, in order from the object side to the image side along the optical axis: A first lens having positive refractive power and a convex object side surface; a second lens having negative optical power; Aperture; a third lens having negative optical power, whose object side is convex and image side is concave; a fourth lens element having positive refractive power, whose object side is concave and image side is convex; a fifth lens element having positive refractive power and having a convex image side; a sixth lens having negative optical power, whose object side is convex and image side is concave; Wherein, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy: 3.9≤(R5+R6) / (R5-R6)≤4.78; An axial distance SAG11 between the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens and an axial distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens satisfy: -6.84≤SAG42 / SAG11≤-4.43; The combined focal length f23 of the second lens and the third lens and the effective focal length f1 of the first lens satisfy: -2.76≤f23 / f1≤-2.

19.

2. The optical imaging lens according to claim 1, It is characterized in that The maximum field of view FOV of the optical imaging lens satisfies: FOV=95.6°.

3. The optical imaging lens according to claim 1, It is characterized in that The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 2.04≤f / EPD≤2.

05.

4. The optical imaging lens according to claim 1, It is characterized in that The distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfy the following: 1.44≤TTL / ImgH≤1.

49.

5. The optical imaging lens according to claim 1, It is characterized in that The on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens satisfy: 0.89≤SAG62 / SAG51≤1.

62.

6. The optical imaging lens according to claim 1, It is characterized in that The edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 1.74≤CT1 / ET1≤1.

91.

7. The optical imaging lens according to claim 1, It is characterized in that The half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens and the axial distance TD from the object side of the first lens to the image side of the last lens in the optical imaging lens satisfy: 0.88≤ImgH / TD<1.

0.

8. The optical imaging lens according to claim 1, It is characterized in that An air interval T45 between the fourth lens and the fifth lens on the optical axis and an air interval T56 between the fifth lens and the sixth lens on the optical axis satisfy: 3.76≤T56 / T45≤8.

03.

9. The optical imaging lens according to claim 1, It is characterized in that A distance SD from the aperture to the image side surface of the last lens in the optical imaging lens and a sum ∑AT of air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface in the optical imaging lens satisfy: 2.63≤SD / ∑AT≤2.

88.

10. The optical imaging lens according to claim 1, It is characterized in that The on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens and the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens satisfy: 2.37≤(SAG31+SAG32) / (SAG31-SAG32)<3.

5.

11. The optical imaging lens according to claim 1, It is characterized in that The effective focal length f4 of the fourth lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: 2.19≤f4 / f45≤2.

39.

12. The optical imaging lens according to claim 1, It is characterized in that A curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens satisfy: 2.71≤R7 / R8≤3.

35.

13. The optical imaging lens according to claim 1, It is characterized in that The combined focal length f345 of the third lens, the fourth lens and the fifth lens and the effective focal length f of the optical imaging lens satisfy: 1.12≤f345 / f≤1.

18.

14. The optical imaging lens according to claim 1, It is characterized in that The absolute value of optical distortion |OPD| of the optical imaging lens satisfies: 0.66%≤|OPD|≤1.21%.

Images