An optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises, in sequence from the object side to the image side along the optical axis, a first lens, a second lens with negative focal length, a third lens with a convex image side, a fourth lens with negative focal length, a fifth lens, and a sixth lens, wherein the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy TTL / ImgH <= 1.35, the effective focal length f3 of the third lens and the effective focal length f of the optical imaging system satisfy 2.5 <= f3 / f <= 4.0, and the curvature radius R3 of the object side of the second lens and the effective focal length f of the optical imaging system satisfy |R3 / f| <= 1.55. The optical imaging lens has the characteristics of a large imaging surface, a large aperture, and ultra-thinness by constraining the ratio of the total optical length of the system to the half image height, and meets the design requirements of intelligent device manufacturers.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical imaging, and particularly relates to an optical imaging lens comprising six lenses. BACKGROUND

[0002] With the rapid development of the semiconductor industry, the performance of electronic photosensitive elements is rapidly improved, the pixel is higher and higher, and the requirement for imaging quality is also improved, which brings great challenges to optical lens design. At present, the competition of intelligent devices taking intelligent terminals as the main carriers in the aspect of photographing has reached a white-hot degree, and the requirements for optical lenses are also more diversified. Not only the size should be reduced as much as possible, but also high imaging effect should be ensured. The existing imaging lenses are difficult to balance the demands of imaging quality, production efficiency, or production cost, which brings great challenges to lens manufacturers.

[0003] Therefore, a six-piece optical imaging lens is needed, which has the characteristics of large image surface, large aperture, and ultra-thinness, and meets the design requirements of intelligent device manufacturers. SUMMARY

[0004] The present application aims to provide an optical imaging lens composed of six lenses, which has the characteristics of large image surface, large aperture, and ultra-thinness, and meets the design requirements of intelligent device manufacturers.

[0005] One aspect of the present application provides an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis: a first lens; a second lens with negative refractive power; a third lens with a convex image side; a fourth lens with negative refractive power, the object side of which is concave, and the image side of which is concave; a fifth lens; and a sixth lens.

[0006] Wherein, the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH≤1.35; the effective focal length f3 of the third lens and the effective focal length f of the optical imaging system satisfy: 2.5≤f3 / f≤4.0.

[0007] According to one embodiment of the present application, the curvature radius R3 of the object side of the second lens and the effective focal length f of the optical imaging system satisfy: |R3 / f|≤1.55.

[0008] According to one embodiment of the present application, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f of the optical imaging system satisfy: 6.5≤|f1 / f|+|f2 / f|+|f3 / f|≤11.5.

[0009] According to one embodiment of the present application, the effective focal length f2 of the second lens and the effective focal length f1 of the first lens satisfy: -6.0 ≤ f2 / f1 ≤ -2.5.

[0010] According to one embodiment of the present application, the effective focal length f3 of the third lens and the radius of curvature R5 of the object side surface of the third lens satisfy: |f3 / R5| ≤ 1.5.

[0011] According to one embodiment of the present application, the central thickness CT3 of the third lens on the optical axis and the air separation T34 of the third lens and the fourth lens on the optical axis satisfy: 0.5 ≤ CT3 / T34 ≤ 2.5.

[0012] According to one embodiment of the present application, the sum ΣCT of the central thicknesses of all the lenses on the optical axis and the sum ΣAT of the air separations between any two adjacent lenses having refractive power among the first lens to the lens closest to the imaging plane on the optical axis satisfy: 1.0 ≤ ΣCT / ΣAT ≤ 2.5.

[0013] According to one embodiment of the present application, the effective focal length f of the optical imaging system and the half of the maximum field angle Semi-FOV of the optical imaging system satisfy: 4.0 mm ≤ f x tan(Semi-FOV) ≤ 5.5 mm.

[0014] According to one embodiment of the present application, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens and the on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis and the vertex of the effective radius of the object side surface of the third lens satisfy: 1.5 ≤ SAG41 / SAG31 ≤ 4.0.

[0015] According to one embodiment of the present application, the central thickness CT3 of the third lens on the optical axis and the edge thickness ET3 of the third lens satisfy: 1.5 ≤ CT3 / ET3 ≤ 2.5.

[0016] According to one embodiment of the present application, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, the on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy: 1.5 ≤ |SAG41+SAG42| / CT4 ≤ 3.0.

[0017] According to one embodiment of the present application, the object side surface of the sixth lens is convex and the image side surface is concave.

[0018] Another aspect of the present application provides an optical imaging lens comprising, in order from the object side to the image side along the optical axis, a first lens, a second lens with negative refractive power, a third lens with positive refractive power, the image side of which is convex, a fourth lens with negative refractive power, the object side of which is concave and the image side of which is concave, a fifth lens, and a sixth lens.

[0019] wherein each lens is independent of each other, and each lens has an air gap on the optical axis; the on-axis distance TTL from the object side of the first lens to the imaging surface and the half diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL / ImgH≤1.35; the curvature radius R3 of the object side of the second lens and the effective focal length f of the optical imaging system satisfy: |R3 / f|≤1.55; the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f of the optical imaging system satisfy: 6.5≤|f1 / f|+|f2 / f|+|f3 / f|≤11.5.

[0020] The present application has the following beneficial effects:

[0021] The optical imaging lens provided by the present application comprises multiple lenses, such as the first lens to the sixth lens. By constraining the ratio of the total optical length of the system and the half image height, the optical imaging lens of the present application is beneficial to maintaining ultra-thin when the lens has a large enough imaging surface, realizing high imaging quality and miniaturization, and has the characteristics of large imaging surface, large aperture, ultra-thin, etc., and meets the design requirements of intelligent device manufacturers. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 The lens group structure diagram of the optical imaging lens embodiment 1 of the present application;

[0024] Figures 2a to 2d The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve, and the magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present application, respectively;

[0025] Figure 3 The lens group structure diagram of the optical imaging lens embodiment 2 of the present application;

[0026] Figures 4a to 4d The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve, and the magnification chromatic aberration curve of the optical imaging lens embodiment 2 of the present application, respectively;

[0027] Figure 5 FIG. 3 is a lens set structure schematic diagram of the optical imaging lens according to an embodiment of the present application;

[0028] Figures 6a to 6d FIG. 4 is an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the optical imaging lens according to the embodiment of the present application, respectively;

[0029] Figure 7 FIG. 5 is a lens set structure schematic diagram of the optical imaging lens according to an embodiment of the present application;

[0030] Figures 8a to 8d FIG. 6 is an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the optical imaging lens according to the embodiment of the present application, respectively;

[0031] Figure 9 FIG. 7 is a lens set structure schematic diagram of the optical imaging lens according to an embodiment of the present application;

[0032] Figures 10a to 10d FIG. 8 is an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the optical imaging lens according to the embodiment of the present application, respectively. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] It should be noted that the expressions of first, second, third and the like in the present specification are only used to distinguish one feature from another feature, and do not indicate any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0035] It should also be understood that the words "comprise", "comprising", "include", "including", and / or "contain", when used in this specification, indicate the presence of the stated features, elements and / or components but do not preclude the presence or addition of one or more other features, elements, components and / or groups thereof. In addition, when expressions such as "at least one of" appear after a list of enumerated features, the expression is intended to modify the entire list of enumerated features and not the individual elements of the list. Furthermore, when describing embodiments of the present application, the use of "may" indicates that one or more embodiments of the present application. Also, the word "exemplary" is intended to mean an example or an illustration.

[0036] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0037] In the description of the present application, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, 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 specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the imaging surface is referred to as the image side surface of the lens.

[0038] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly idealized or formal sense unless expressly so defined herein.

[0039] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The features, principles, and other aspects of the present application will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0040] Exemplary Embodiments

[0041] The optical imaging lens of the exemplary embodiment of the present application includes six lenses, including, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each lens is independent of each other, and each lens has an air gap on the optical axis.

[0042] In the present exemplary embodiment, the first lens has a positive refractive power; the second lens has a negative refractive power; the third lens can have a positive refractive power or a negative refractive power, and its image side surface is convex; the fourth lens has a negative refractive power, its object side surface is concave, and its image side surface is concave; the fifth lens can have a positive refractive power or a negative refractive power; and the sixth lens can have a positive refractive power or a negative refractive power.

[0043] In the present exemplary embodiment, the condition formula satisfied by the on-axis distance TTL from the first lens object side to the imaging plane and the half of the diagonal length of the effective pixel area on the imaging plane ImgH is TTL / ImgH≤1.35. By restricting the ratio of the total optical length of the system and the half image height, it is beneficial to maintain ultra-thin when the lens has a large enough imaging plane, to achieve high imaging quality and miniaturization. More specifically, 1.2≤TTL / ImgH≤1.35 is satisfied, for example, 1.26≤TTL / ImgH≤1.34.

[0044] In the present exemplary embodiment, the condition formula satisfied by the effective focal length f3 of the third lens and the effective focal length f of the optical imaging system is 2.5≤f3 / f≤4.0. By controlling the ratio of the effective focal length of the third lens and the effective focal length of the system within a reasonable range, the on-axis aberration and off-axis aberration are balanced to ensure imaging quality. More specifically, 2.7≤f3 / f≤4.0 is satisfied, for example, 2.72≤f3 / f≤4.00.

[0045] In the present exemplary embodiment, the condition formula satisfied by the curvature radius R3 of the object side surface of the second lens and the effective focal length f of the optical imaging system is |R3 / f|≤1.55. By controlling the ratio of the curvature radius of the object side surface of the second lens and the effective focal length of the system, the amount of astigmatism of the system can be controlled, and the imaging quality of the off-axis field of view can be improved. More specifically, 0.5≤|R3 / f|≤1.52 is satisfied, for example, 0.59≤|R3 / f|≤1.50.

[0046] In the present exemplary embodiment, the condition formula satisfied by the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f of the optical imaging system is 6.5≤|f1 / f|+|f2 / f|+|f3 / f|≤11.5. By controlling the sum of the absolute values of the ratio of the effective focal lengths of the first, second, and third lenses and the effective focal length of the system, the light power distribution of the system is balanced, and the system sensitivity is reduced. More specifically, 6.8≤|f1 / f|+|f2 / f|+|f3 / f|≤11.2 is satisfied, for example, 6.87≤|f1 / f|+|f2 / f|+|f3 / f|≤11.12.

[0047] In the present exemplary embodiment, the condition formula satisfied by the effective focal length f2 of the second lens and the effective focal length f1 of the first lens is -6.0≤f2 / f1≤-2.5. By controlling the ratio of the effective focal lengths of the second lens and the first lens, the system field curvature is effectively controlled to ensure imaging quality. More specifically, -5.5≤f2 / f1≤-2.8 is satisfied, for example, -5.32≤f2 / f1≤-2.83.

[0048] In the present exemplary embodiment, the effective focal length f3 of the third lens and the radius of curvature R5 of the object side surface of the third lens satisfy the condition formula: |f3 / R5|≤1.5. By restricting the ratio of the effective focal length of the third lens and the radius of curvature of the object side surface of the third lens, the surface shape of the third lens can be improved, and the sensitivity of the system to the third lens can be reduced. More specifically, 0.2≤|f3 / R5|≤1.4 is satisfied, for example, 0.28≤|f3 / R5|≤1.38.

[0049] In the present exemplary embodiment, the central thickness CT3 of the third lens on the optical axis and the air gap T34 of the third lens and the fourth lens on the optical axis satisfy the condition formula: 0.5≤CT3 / T34≤2.5. By controlling the ratio of the central thickness of the third lens and the on-axis gap of the third and fourth lenses, the processability of the system can be ensured, and the production cost can be reduced. More specifically, 0.9≤CT3 / T34≤2.1 is satisfied, for example, 0.93≤CT3 / T34≤2.08.

[0050] In the present exemplary embodiment, the sum ΣCT of the central thicknesses of all the lenses on the optical axis and the sum ΣAT of the air gaps between any two adjacent lenses with refractive power among the first lens to the lens closest to the imaging surface on the optical axis satisfy the condition formula: 1.0≤ΣCT / ΣAT≤2.5. By controlling the ratio of the sum of the central thicknesses of the lenses and the sum of the gaps between the lenses, the thickness of the lens can be effectively controlled, the volume of the lens can be reduced, and the weight of the lens can be reduced. More specifically, 1.4≤ΣCT / ΣAT≤2.2 is satisfied, for example, 1.46≤ΣCT / ΣAT≤2.14.

[0051] In the present exemplary embodiment, the effective focal length f of the optical imaging system and half of the maximum field of view angle Semi-FOV of the optical imaging system satisfy the condition formula: 4.0mm≤f×tan(Semi-FOV)≤5.5mm. By controlling the product of the effective focal length of the system and the tangent value of the half field of view angle, it can be ensured that the system has a large enough image surface to ensure imaging quality. More specifically, 4.6mm≤f×tan(Semi-FOV)≤5.2mm is satisfied, for example, 4.64mm≤f×tan(Semi-FOV)≤5.12mm.

[0052] In the present exemplary embodiment, the on-axis distance SAG41 between the intersection of the fourth lens' object side surface and the optical axis and the vertex of the effective radius of the fourth lens' object side surface and the on-axis distance SAG31 between the intersection of the third lens' object side surface and the optical axis and the vertex of the effective radius of the third lens' object side surface satisfy the condition formula: 1.5≤SAG41 / SAG31≤4.0. By controlling the ratio of the fourth lens' object side surface sag and the third lens' object side surface sag, the lens' processability can be ensured, while the imaging quality of the edge light of the entrance pupil is ensured. More specifically, 1.7≤SAG41 / SAG31≤3.9, for example, 1.71≤SAG41 / SAG31≤3.83.

[0053] In the present exemplary embodiment, the on-axis distance SAG41 between the intersection of the fourth lens' object side surface and the optical axis and the vertex of the effective radius of the fourth lens' object side surface and the on-axis distance SAG31 between the intersection of the third lens' object side surface and the optical axis and the vertex of the effective radius of the third lens' object side surface satisfy the condition formula: 1.5≤SAG41 / SAG31≤4.0. By controlling the ratio of the fourth lens' object side surface sag and the third lens' object side surface sag, the lens' processability can be ensured, while the imaging quality of the edge light of the entrance pupil is ensured. More specifically, 1.7≤SAG41 / SAG31≤3.9, for example, 1.71≤SAG41 / SAG31≤3.83.

[0054] In the present exemplary embodiment, the on-axis distance SAG41 between the intersection of the fourth lens' object side surface and the optical axis and the vertex of the effective radius of the fourth lens' object side surface, the on-axis distance SAG42 between the intersection of the fourth lens' image side surface and the optical axis and the vertex of the effective radius of the fourth lens' image side surface and the on-axis center thickness CT4 of the fourth lens satisfy the condition formula: 1.5≤

[0055] |SAG41+SAG42| / CT4≤3.0. By controlling the ratio of the sum of the object side surface sag and the image side surface sag of the fourth lens and the center thickness of the fourth lens, the processability of the fourth lens can be ensured, and the system sensitivity is reduced. More specifically, 1.9≤

[0056] |SAG41+SAG42| / CT4≤2.95, for example, 1.96≤|SAG41+SAG42| / CT4≤2.92.

[0057] In the present exemplary embodiment, the object side surface of the sixth lens is convex, and the image side surface is concave. By controlling the shape of the sixth lens to be convex on the object side and concave on the image side, the depth of field of the lens can be effectively improved, and the effective imaging distance range of the lens is increased.

[0058] In the present exemplary embodiment, the optical imaging lens described above can further comprise a diaphragm. The diaphragm can be disposed at a suitable position as required, for example, the diaphragm can be disposed between the object side and the first lens. Alternatively, the optical imaging lens described above can further comprise a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0059] The optical imaging lens according to the above-described embodiments of the present application can employ multiple lenses, for example, six lenses as described above. By reasonably allocating the optical power, surface shape, central thickness of each lens, and the on-axis distance between each lens, etc., the optical imaging lens has a large imaging image surface, has the characteristics of wide imaging range and high imaging quality, and ensures the ultra-thin nature of the mobile phone.

[0060] In the exemplary embodiments, at least one of the lens surfaces of each lens is a non-spherical lens surface, that is, at least one of the object side surface to the image side surface of the first lens to the sixth lens is a non-spherical lens surface. The characteristic of the non-spherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens, which is different from the spherical lens with constant curvature from the center of the lens to the periphery of the lens. The non-spherical lens has better curvature radius characteristics, has the advantages of improving the distortion aberration and improving the astigmatism aberration. After using the non-spherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Alternatively, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is a non-spherical lens surface. Alternatively, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are non-spherical lens surfaces.

[0061] However, those skilled in the art should understand that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although six lenses are described as an example in the embodiments, the optical imaging lens is not limited to comprising six lenses, and the optical imaging lens can further comprise other number of lenses if required.

[0062] The specific embodiments of the optical imaging lens suitable for the above-described embodiments are further described below with reference to the accompanying drawings. Specific Embodiment 1

[0064] Figure 1 The lens group structure diagram of the optical imaging lens embodiment 1 of the present application is shown in the figure. The optical imaging lens comprises, in order along the optical axis from the object side to the image side: a diaphragm 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 filter E7, and an imaging surface S15.

[0065] The first lens E1 has positive refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has positive refractive power, the object side surface S5 is convex, and the image side surface S6 is convex. The fourth lens E4 has negative refractive power, the object side surface S7 is concave, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is convex, and the image side surface S10 is convex. The sixth lens E6 has negative refractive power, the object side surface S11 is convex, and the image side surface S12 is concave. The filter E7 has the object side surface S13 and the image side surface S14. The light from the object sequentially passes through each of the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0066] As shown in Table 1, the basic parameter table of the optical imaging lens in Example 1 is shown, wherein the units of the radius of curvature, the thickness, and the focal length are millimeters (mm).

[0067] Surface number Surface type Radius of curvature Thickness / distance Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Sphere Infinity Infinity STO Sphere Infinity -0.5134 S1 Asphere 2.3363 0.8444 5.67 1.55 56.1 -0.0004 S2 Asphere 8.3188 0.3045 9.4140 S3 Asphere -6.1103 0.2350 -17.15 1.68 19.2 -83.0326 S4 Asphere -13.0838 0.3645 -99.0000 S5 Asphere 15.6857 0.4870 18.29 1.55 56.1 -41.4787 S6 Asphere -27.1639 0.4565 47.4787 S7 Asphere -15.8093 0.3345 -21.19 1.62 25.9 82.2414 S8 Asphere 77.7754 0.5402 27.7831 S9 Asphere 6.8325 1.2493 5.45 1.55 56.1 0.2790 S10 Asphere -4.9299 0.4488 -0.0390 S11 Asphere 6.5038 0.5790 -4.04 1.54 55.6 0.1669 S12 Asphere 1.5752 0.6674 -0.9899 S13 Sphere Infinity 0.2100 1.51 64.2 S14 Sphere Infinity 0.2820 S15 Sphere Infinity

[0068] Table 1

[0069] As shown in Table 2, in Example 1, the total effective focal length f of the optical imaging lens is 5.5 mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens is 7.00 mm, the half of the diagonal length of the effective pixel area of the electronic photosensitive element of the optical imaging lens ImgH is 5.31 mm, and the half of the maximum field angle of the optical imaging lens Semi-FOV is 42.94°.

[0070]

[0071]

[0072] Table 2

[0073] The optical imaging lens in Example 1 satisfies:

[0074] TTL / ImgH = 1.32, wherein TTL is the distance on the axis from the object side surface of the first lens to the imaging surface, and ImgH is the half of the diagonal length of the effective pixel area on the imaging surface;

[0075] f3 / f = 3.33, wherein f3 is the effective focal length of the third lens, and f is the effective focal length of the optical imaging system;

[0076] |R3 / f| = 1.11, wherein R3 is the radius of curvature of the object side surface of the second lens, and f is the effective focal length of the optical imaging system;

[0077] |f1 / f|+|f2 / f|+|f3 / f|=7.47, wherein f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f is the effective focal length of the optical imaging system;

[0078] f2 / f1=-3.03, wherein f2 is the effective focal length of the second lens, and f1 is the effective focal length of the first lens;

[0079] |f3 / R5|=1.17, wherein f3 is the effective focal length of the third lens, and R5 is the curvature radius of the object side surface of the third lens;

[0080] CT3 / T34=1.07, wherein CT3 is the center thickness of the third lens on the optical axis, and T34 is the air gap between the third lens and the fourth lens on the optical axis;

[0081] ΣCT / ΣAT=1.76, wherein ΣCT is the sum of the center thicknesses of all the lenses on the optical axis, and ΣAT is the sum of the air gaps between any two adjacent lenses with optical power on the optical axis from the first lens to the lens closest to the imaging surface;

[0082] f×tan(Semi-FOV)=5.12mm, wherein f is the effective focal length of the optical imaging system, and Semi-FOV is half of the maximum field of view angle of the optical imaging system;

[0083] SAG41 / SAG31=3.17, wherein SAG41 is the axial distance between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens, and SAG31 is the axial distance between the intersection of the object side surface of the third lens and the optical axis and the effective radius vertex of the object side surface of the third lens;

[0084] CT3 / ET3=1.73, wherein CT3 is the center thickness of the third lens on the optical axis, and ET3 is the edge thickness of the third lens;

[0085] |SAG41+SAG42| / CT4=2.91, wherein SAG41 is the axial distance between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens, SAG42 is the axial distance between the intersection of the image side surface of the fourth lens and the optical axis and the effective radius vertex of the image side surface of the fourth lens, and CT4 is the center thickness of the fourth lens on the optical axis.

[0086] In Embodiment 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, and the surface type x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0087]

[0088] wherein x is the sagittal height of the aspherical surface at a position along the optical axis at a height h, c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1), k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspherical surface.

[0089] In Embodiment 1, the object side and the image side of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and Table 3 shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, A32, A34, A36, A38, A40, A42, A44, A46, A48, A50, A52, A54, A56, A58, A60, A62, A64, A66, A68, A70, A72, A74, A76, A78, A80, A82, A84, A86, A88, A90, A92, A94, A96, A98, and A100 of the aspherical surfaces S1-S12 that can be used in Embodiment 1. 10 12 14 16 18 20 22 24 26 28 30 .

[0090] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -5.6196E-03 -7.2049E-03 -3.6756E-03 -1.0565E-03 -3.4020E-04 -1.0132E-05 -1.6178E-05 S2 -8.3259E-02 -1.2351E-02 -1.0955E-03 -9.7336E-05 -1.4589E-04 -1.2933E-04 -9.3715E-06 S3 1.9172E-02 3.1446E-02 8.3003E-04 1.4877E-03 -3.7501E-04 -1.8506E-04 -1.2064E-04 S4 1.1304E-01 2.6421E-02 5.0725E-03 2.3025E-03 8.2008E-04 2.6578E-04 5.3801E-05 S5 -2.1379E-01 -1.9442E-02 -9.1477E-04 2.0693E-03 1.3647E-03 8.8495E-04 3.5723E-04 S6 -2.9188E-01 -2.4091E-02 -2.4020E-03 2.1204E-04 -9.2569E-05 3.1626E-04 1.0221E-04 S7 -4.0728E-01 6.1813E-02 1.8471E-03 -7.7782E-04 -2.2580E-03 6.4033E-04 2.1952E-04 S8 -6.3208E-01 1.4769E-01 -6.6345E-03 -2.5085E-03 -3.0088E-03 1.5957E-03 -1.5747E-04 S9 -1.0697E+00 1.5254E-02 2.2799E-02 2.8723E-02 -2.0722E-03 -3.0072E-03 -2.9142E-03 S10 4.6210E-01 -1.4317E-01 -8.8286E-03 4.1477E-02 -2.4651E-02 9.4895E-03 -2.2223E-03 S11 -3.0434E+00 1.3082E+00 -6.1176E-01 2.8365E-01 -1.3429E-01 6.8074E-02 -3.7128E-02 S12 -8.1861E+00 1.9758E+00 -6.0681E-01 2.7862E-01 -1.4451E-01 7.4439E-02 -3.7394E-02 Surface number A18 A20 A22 A24 A26 A28 A30 S1 2.6146E-05 -3.2385E-06 1.2051E-05 -3.3078E-06 4.4395E-06 -7.0891E-06 1.4086E-06 S2 3.9910E-05 5.7577E-05 2.9796E-05 1.2660E-05 -4.2056E-06 -4.8016E-06 -6.5492E-06 S3 1.5051E-05 3.9027E-05 3.5944E-05 1.2591E-05 4.5323E-06 1.2768E-07 2.8045E-07 S4 -4.3628E-06 -1.3536E-05 -3.2084E-06 1.7501E-06 2.5945E-06 -3.0273E-06 -4.0452E-06 S5 1.6435E-04 3.0481E-05 1.1696E-05 -1.3184E-05 -3.1797E-06 -7.4257E-06 1.6360E-06 S6 7.5549E-05 6.1195E-06 1.5546E-05 -1.3239E-07 5.2441E-06 1.3355E-06 1.7758E-06 S7 2.1212E-05 -7.4242E-05 2.2568E-05 5.6694E-06 1.1064E-05 -3.5768E-06 3.8536E-06 S8 -3.5157E-04 -1.5311E-04 4.8434E-05 1.2575E-05 -3.3784E-06 -3.6713E-06 2.9953E-06 S9 -9.2040E-04 4.2803E-04 3.7861E-04 4.9372E-05 -5.0438E-05 -6.5132E-05 -3.3707E-05 S10 -1.6120E-03 5.2882E-04 -6.7846E-04 -1.7962E-04 3.0115E-04 -1.1219E-04 -2.3053E-05 S11 1.8674E-02 -7.3294E-03 2.1479E-03 -7.5480E-05 -4.8814E-04 3.9065E-04 -1.3479E-04 S12 1.9774E-02 -1.0618E-02 4.5992E-03 -2.4192E-03 1.4403E-03 -8.3541E-04 6.1666E-04

[0091] Table 3

[0092] Figure 2a Figure 9 shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of converging focal points of light rays of different wavelengths after passing through the lens. Figure 2b Figure 10 shows the astigmatism curve of the optical imaging lens of Embodiment 1, which represents the meridional image curvature and sagittal image curvature. Figure 2c Figure 11 shows the distortion curve of the optical imaging lens of Embodiment 1, which represents the distortion size values corresponding to different image heights. Figure 2d Figure 12 shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. Figures 2a to 2d As shown in Figure 12, the optical imaging lens given in Embodiment 1 can achieve good imaging quality. Specific Embodiment 2

[0094] Figure 3 Figure 1 is a lens group structure schematic diagram of the optical imaging lens of Embodiment 2 of the present application, and the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a stop 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 filter E7, and an imaging surface S15.

[0095] ​​​​​​​​​​The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0096] Table 4 shows the basic parameters of the optical imaging lens in Example 2, where the units for radius of curvature, thickness, and focal length are all millimeters (mm).

[0097] Surface number Surface type Radius of curvature Thickness / distance Focal length Refractive index Dispersion coefficient Conic coefficient OBJ Sphere Infinity Infinity STO Sphere Infinity -0.4602 S1 Asphere 2.3780 0.7975 6.09 1.55 56.1 -0.1908 S2 Asphere 7.3517 0.4509 4.8119 S3 Asphere -3.1727 0.2350 -26.69 1.68 19.2 -41.9740 S4 Asphere -3.9629 0.2367 -68.2377 S5 Asphere 14.1985 0.4603 18.20 1.55 56.1 65.4954 S6 Asphere -32.7268 0.4967 -99.0000 S7 Asphere -18.4501 0.3492 -25.93 1.62 25.9 79.2947 S8 Asphere 124.5809 0.6549 99.0000 S9 Asphere 7.9193 1.2506 5.58 1.55 56.1 0.4037 S10 Asphere -4.6801 0.5617 -1.1725 S11 Asphere 7.7715 0.4218 -3.90 1.54 55.6 0.3458 S12 Asphere 1.6187 0.6316 -0.9848 S13 Sphere Infinity 0.2100 1.51 64.2 S14 Sphere Infinity 0.2461 S15 Sphere Infinity

[0098] Table 4

[0099] As shown in Table 5, in Embodiment 2, the total effective focal length f of the optical imaging lens is 5.42 mm, the distance TTL on the optical axis from the object surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens is 7.00 mm, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element of the optical imaging lens is ImgH = 5.31 mm, and half the maximum field of view of the optical imaging lens is Semi-FOV = 43.1°. The parameters of each relation are as explained in the first embodiment, and the values ​​of each relation are listed in the table below.

[0100]

[0101] Table 5

[0102] In Example 2, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 6 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1-S12 in Example 2. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0103]

[0104]

[0105] Table 6

[0106] Figure 4a The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the lens. Figure 4b The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 4c The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion size value corresponding to different image heights. Figure 4d The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of light rays on the imaging surface at different image heights after passing through the lens. According to Figures 4a to 4d As shown, the optical imaging lens given in Example 2 can achieve good imaging quality. Specific Embodiment 3

[0108] Figure 5 The lens group structure diagram of Example 3 of the optical imaging lens of the present application is shown, which sequentially includes, along the optical axis from the object side to the image side: a stop 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 filter E7, and an imaging surface S15.

[0109] The first lens E1 has positive focal power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has negative focal power, the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface. The third lens E3 has positive focal power, the object side surface S5 is a convex surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative focal power, the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface. The fifth lens E5 has positive focal power, the object side surface S9 is a convex surface, and the image side surface S10 is a convex surface. The sixth lens E6 has negative focal power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through each of the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0110] As shown in Table 7, the basic parameter table of the optical imaging lens of Example 3 is shown, wherein the units of the curvature radius, the thickness, and the focal length are all millimeters (mm).

[0111]

[0112]

[0113] Table 7

[0114] As shown in Table 8, in Embodiment 3, the total effective focal length f of the optical imaging lens is 5.41 mm, the distance TTL on the optical axis from the object surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens is 7.10 mm, half the diagonal length of the effective pixel area of ​​the electronic light-sensing element of the optical imaging lens is ImgH, which is 5.31 mm, and half the maximum field of view FOV of the optical imaging lens is 42.8°. The parameters of each relation are as explained in the first embodiment, and the values ​​of each relation are listed in the table below.

[0115]

[0116] Table 8

[0117] In Example 3, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 9 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1-S12 in Example 3. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0118]

[0119]

[0120] Table 9

[0121] Figure 6a The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6b The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6c The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 6d The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 6a to 6d As shown, the optical imaging lens given in Example 3 can achieve good imaging quality. Specific Implementation Example 4

[0123] Figure 7This is a schematic diagram of the lens group structure of embodiment 4 of the optical imaging lens of the present invention. The optical imaging lens includes, in sequence from the object side to the image side along the optical axis: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

[0124] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0125] Table 10 shows the basic parameters of the optical imaging lens in Example 4, where the units for radius of curvature, thickness, and focal length are all millimeters (mm).

[0126]

[0127]

[0128] Table 10

[0129] As shown in Table 11, in Embodiment 4, the total effective focal length f of the optical imaging lens is 5.48 mm, the distance TTL on the optical axis from the object surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens is 7.06 mm, half the diagonal length of the effective pixel area of ​​the electronic light-sensing element of the optical imaging lens is ImgH = 5.31 mm, and half the maximum field of view of the optical imaging lens is Semi-FOV = 43.07°. The parameters of each relation are as explained in the first embodiment, and the values ​​of each relation are listed in the table below.

[0130]

[0131] Table 11

[0132] In Example 4, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 12 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1-S12 in Example 4. 10 A 12 A 14 A16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0133]

[0134]

[0135] Table 12

[0136] Figure 8a The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8b The astigmatism curve of the optical imaging lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8c The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 8d The magnification chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 8a to 8d As shown, the optical imaging lens given in Example 4 can achieve good imaging quality. Specific Implementation Example 5

[0138] Figure 9 This is a schematic diagram of the lens group structure of embodiment 5 of the optical imaging lens of the present invention. The optical imaging lens includes, in sequence from the object side to the image side along the optical axis: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

[0139] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0140] Table 13 shows the basic parameters of the optical imaging lens in Example 5, where the units for radius of curvature, thickness, and focal length are all millimeters (mm).

[0141]

[0142]

[0143] Table 13

[0144] As shown in Table 14, in Embodiment 5, the total effective focal length f of the optical imaging lens is 5.11 mm, the distance TTL on the optical axis from the object surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens is 6.67 mm, half the diagonal length of the effective pixel area of ​​the electronic photosensitive element of the optical imaging lens is ImgH = 5.31 mm, and half the maximum field of view of the optical imaging lens is Semi-FOV = 42.22°. The parameters of each relation are as explained in the first embodiment, and the values ​​of each relation are listed in the table below.

[0145]

[0146] Table 14

[0147] In Example 5, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 15 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1-S12 in Example 5. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0148]

[0149]

[0150] Table 15

[0151] Figure 10a The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 5 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 10b The astigmatism curve of the optical imaging lens of Embodiment 5 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10c The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude value corresponding to different image heights.Figure 10d The magnification chromatic aberration curve of the optical imaging lens of embodiment 5 is shown, which represents the deviation of light rays after passing through the lens at different image heights on the imaging surface. According to Figures 10a to 10d It can be seen from the figure that the optical imaging lens given in embodiment 5 can achieve good imaging quality.

[0152] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, improvement, equivalent replacement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens has six pieces of lenses with optical power, which sequentially include, along the optical axis from the object side to the image side: a first lens with positive optical power, whose object side surface is convex, and whose image side surface is concave; a second lens with negative optical power; a third lens with positive optical power, whose image side surface is convex; a fourth lens with negative optical power, whose object side surface is concave, and whose image side surface is concave; a fifth lens with positive optical power, whose object side surface is convex; a sixth lens with negative optical power, whose object side surface is convex, and whose image side surface is concave; wherein an on-axis distance TTL from the object side surface of the first lens to the image plane and a half of a diagonal line length ImgH of an effective pixel area on the image plane satisfy: 1.26≤TTL / ImgH≤1.35; an effective focal length f3 of the third lens and an effective focal length f of the optical imaging system satisfy: 3.33≤f3 / f≤4.0; an effective focal length f2 of the second lens and an effective focal length f1 of the first lens satisfy: -5.32≤f2 / f1≤-3.03; and an effective focal length f3 of the third lens and a curvature radius R5 of the object side surface of the third lens satisfy: 0.95≤|f3 / R5|≤1.

38.

2. The optical imaging lens according to claim 1, characterized in that: a central thickness CT3 of the third lens on the optical axis and an air gap T34 of the third lens and the fourth lens on the optical axis satisfy: 0.93≤CT3 / T34≤1.

45. 3.The optical imaging lens according to claim 1, wherein: a sum ΣCT of the central thicknesses of all the lenses on the optical axis and a sum ΣAT of the air gaps between any two adjacent lenses with optical power on the optical axis satisfy: 1.46≤ΣCT / ΣAT≤2.

14. ​ 4.The optical imaging lens according to claim 1, wherein: an effective focal length f of the optical imaging system and a half Semi-FOV of a maximum field of view angle of the optical imaging system satisfy: 5.01mm≤f×tan(Semi-FOV)≤5.12mm. ​ 5. The optical imaging lens according to claim 1, characterized in that: an on-axis distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens and an on-axis distance SAG31 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 satisfy: 2.07≤SAG41 / SAG31≤3.

83. 6.The optical imaging lens according to claim 1, wherein: a central thickness CT3 of the third lens on the optical axis and an edge thickness ET3 of the third lens satisfy: 1.73≤CT3 / ET3≤2.

26. ​ 7.The optical imaging lens according to claim 1, wherein: an on-axis distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens, an on-axis distance SAG42 from 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 and a central thickness CT4 of the fourth lens on the optical axis satisfy: 2.35≤|SAG41+SAG42| / CT4≤2.

92. ​ 8. The optical imaging lens according to claim 1, characterized in that: The curvature radius R3 of the object side surface of the second lens satisfies: 0.59≤|R3 / f|≤1.11; the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f of the optical imaging system satisfy: 7.47≤|f1 / f|+|f2 / f|+|f3 / f|≤11.12.

Images