Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and at least one spacer, the lens group and the spacer are arranged in the lens barrel, the lens group is composed of seven lenses, and the seven lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side; the at least one spacer comprises a second spacer and a third spacer; f3 / EP23 is more than or equal to-18.12 and less than or equal to-15.67; r6 / d3s is greater than or equal to 2.17 and less than or equal to 3.09. The seven-piece optical imaging lens solves the problem that the middle stray light is increased due to the fact that a seven-piece optical imaging lens in the prior art meets the requirement for small size.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical imaging equipment technical field, specifically, relate to an optical imaging lens. BACKGROUND

[0002] With the continuous development of science and technology, portable electronic products such as mobile phones and tablets have become indispensable tools in people's lives, and optical imaging lenses, as an indispensable part of portable electronic products, gradually develop towards miniaturization and thinness while ensuring imaging quality to adapt to these electronic products.

[0003] At present, seven-piece optical imaging lenses are more common, and the existing seven-piece optical imaging lenses usually compress the thickness and size of the intermediate structure to realize the compression of the overall size to meet the small size, but in this case, the edge part of the intermediate structure is prone to produce more stray light, which affects the imaging quality.

[0004] That is, the seven-piece optical imaging lens in the prior art has the problem of increasing intermediate stray light to meet small size. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide an optical imaging lens to solve the problem of increasing intermediate stray light to meet small size in the seven-piece optical imaging lens in the prior art.

[0006] In order to achieve the above purpose, according to one aspect of the utility model, an optical imaging lens is provided, which comprises a lens barrel, a lens group and at least one spacer arranged in the lens barrel, the lens group is composed of seven lenses, and the seven lenses are sequentially arranged from the object side to the image side as the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens; the at least one spacer comprises a second spacer arranged between the second lens and the third lens and in contact with the image side surface of the second lens, and a third spacer arranged between the third lens and the fourth lens and in contact with the image side surface of the third lens; the effective focal length f3 of the third lens and the axial interval EP23 between the second spacer and the third spacer satisfy: -18.12≤f3 / EP23≤-15.67; the curvature radius R6 of the image side surface of the third lens and the inner diameter d3s of the object side surface of the third spacer satisfy: 2.17≤R6 / d3s≤3.09.

[0007] According to another aspect of the utility model, provide a kind of optical imaging lens, including lens barrel and the lens group and at least one spacer being arranged in lens barrel, lens group is made of seven lenses, seven lenses are sequentially first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens from object side to image side;First lens has positive focal power, second lens has positive focal power, third lens has negative focal power, fourth lens has negative focal power, fifth lens has positive focal power, sixth lens has negative focal power, and seventh lens has negative focal power;The object side surface of first lens is convex, and the image side surface is concave;The object side surface of second lens is convex, and the image side surface is concave;The image side surface of third lens is concave;The object side surface of fourth lens is convex, and the image side surface is concave;The object side surface of fifth lens is concave, and the image side surface is convex;The object side surface of sixth lens is concave, and the image side surface is concave;The object side surface of seventh lens is convex, and the image side surface is concave;At least one spacer includes second spacer being placed between second lens and third lens and being partially contacted with the image side surface of second lens, third spacer being placed between third lens and fourth lens and being partially contacted with the image side surface of third lens;The effective focal length f3 of third lens and the axial interval EP23 between second spacer and third spacer satisfy:-18.12≤f3 / EP23≤-15.67;The curvature radius R4 of the image side surface of second lens and the inner diameter d2s of the object side surface of second spacer satisfy:5.77≤R4 / d2s≤7.66.

[0008] According to the utility model discloses another aspect provides a kind of optical imaging lens, including lens barrel and the lens group and at least one spacer of being arranged in lens barrel, lens group is made of seven lenses, seven lenses are sequentially first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens from object side to image side;First lens has positive focal power, second lens has positive focal power, third lens has negative focal power, fourth lens has negative focal power, fifth lens has positive focal power, sixth lens has negative focal power, and seventh lens has negative focal power;The object side surface of first lens is convex, and the image side surface is concave;The object side surface of second lens is convex, and the image side surface is concave;The image side surface of third lens is concave;The object side surface of fourth lens is convex, and the image side surface is concave;The object side surface of fifth lens is concave, and the image side surface is convex;The object side surface of sixth lens is concave, and the image side surface is concave;The object side surface of seventh lens is convex, and the image side surface is concave;At least one spacer includes the second spacer being placed between second lens and third lens and being partially contacted with the image side surface of second lens, the third spacer being placed between third lens and fourth lens and being partially contacted with the image side surface of third lens;The central thickness CT3 of third lens on optical axis, the air interval T23 of second lens and third lens on optical axis and the air interval T34 between third lens and fourth lens on optical axis satisfy: 0.28≤CT3 / (T23+T34)≤0.35;The effective focal length f3 of third lens and the inner diameter d3s of the object side surface of third spacer satisfy: -3.79≤f3 / d3s≤-3.39.

[0009] Further, at least one spacer further includes the first spacer being placed between first lens and second lens and being partially contacted with the image side surface of first lens, and the curvature radius R2 of the image side surface of first lens, the refractive index N1 of first lens, the outer diameter D1s of the object side surface of first spacer and the inner diameter d1s of the object side surface of first spacer satisfy: 1.89≤R2×N1 / (D1s-d1s)≤2.67.

[0010] Further, at least one spacer further includes the first spacer being placed between first lens and second lens and being partially contacted with the image side surface of first lens, and the effective focal length f1 of first lens and the axial interval EP01 between the object side end surface of lens barrel and first spacer satisfy: 6.00≤f1 / EP01≤6.63.

[0011] Further, at least one spacer further includes the first spacer being placed between first lens and second lens and being partially contacted with the image side surface of first lens, and the curvature radius R3 of the object side surface of second lens, the refractive index N2 of second lens, the outer diameter D1m of the image side surface of first spacer and the inner diameter d1m of the image side surface of first spacer satisfy: 1.60≤R3×N2 / (D1m-d1m)≤2.05.

[0012] Further, a radius of curvature R4 of an image side surface of the second lens and an inner diameter d2s of an object side surface of the second spacer satisfy: 5.77 ≤ R4 / d2s ≤ 7.66.

[0013] Further, the at least one spacer further includes a first spacer disposed between the first lens and the second lens and partially in contact with the image side surface of the first lens, and an effective focal length f2 of the second lens and an axial interval EP12 between the first spacer and the second spacer satisfy: 32.29 ≤ f2 / EP12 ≤ 35.52.

[0014] Further, a central thickness CT3 of the third lens on the optical axis, a maximum axial thickness CP3 of the third spacer, and an air interval T23 of the second lens and the third lens on the optical axis satisfy: 2.83 ≤ (CT3+CP3) / T23 ≤ 4.98.

[0015] Further, a radius of curvature R7 of an object side surface of the fourth lens and an outer diameter D3m of an image side surface of the third spacer satisfy: 2.20 ≤ R7 / D3m ≤ 9.70.

[0016] Further, the at least one spacer further includes a fourth spacer disposed between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, and a radius of curvature R8 of the image side surface of the fourth lens, an outer diameter D4s of an object side surface of the fourth spacer, and an inner diameter d4s of the object side surface of the fourth spacer satisfy: 2.28 ≤ R8 / (D4s-d4s) ≤ 4.80.

[0017] Further, the at least one spacer further includes a fourth spacer disposed between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, and a radius of curvature R9 of an object side surface of the fifth lens and an inner diameter d4m of an image side surface of the fourth spacer satisfy: -2.47 ≤ R9 / d4m ≤ -1.54.

[0018] Further, the at least one spacer further includes a fifth spacer disposed between the fifth lens and the sixth lens and partially in contact with the image side surface of the fifth lens, and an outer diameter D5s of an object side surface of the fifth spacer and a radius of curvature R10 of the image side surface of the fifth lens satisfy: -3.18 ≤ D5s / R10 ≤ -2.00.

[0019] Further, the at least one spacer further comprises a fifth spacer disposed between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, a sixth spacer disposed between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens, and a curvature radius R11 of the object side surface of the sixth lens and a curvature radius R12 of the image side surface of the sixth lens satisfy: -2.58≤R12 / R11≤-0.29; a central thickness CT6 of the sixth lens on the optical axis, a maximum axial thickness CP5 of the fifth spacer, and an axial interval EP56 between the fifth spacer and the sixth spacer satisfy: 1.50≤(CP5+EP56) / CT6≤3.11.

[0020] Further, the at least one spacer further comprises a sixth spacer disposed between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens, and an inner diameter d6m of the image side surface of the sixth spacer and a curvature radius R13 of the object side surface of the seventh lens satisfy: 2.51≤d6m / R13≤3.21.

[0021] Further, the first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the third lens has negative refractive power, the image side surface of the third lens is concave; the sixth lens has negative refractive power, the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is concave; and the seventh lens has negative refractive power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave.

[0022] Further, the second lens has positive refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the fourth lens has negative refractive power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave; and the fifth lens has positive refractive power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex.

[0023] Applying the technical solution of this utility model, the optical imaging lens of this application consists of a lens barrel and seven lenses and multiple spacers disposed within the lens barrel. By rationally arranging the positions of the seven lenses, the second spacer, and the third spacer, and setting the optical imaging lens to satisfy -18.12≤f3 / EP23≤-15.67, controlling the ratio of the focal length of the third lens to the axial spacing between the second and third spacers helps to prevent the effective focal length of the third lens from becoming too large. Simultaneously, it constrains the edge thickness of the third lens to a smaller range, which helps to compress the size of the intermediate structure, making the intermediate structure of the optical imaging lens more compact and facilitating miniaturization. However, when controlling the effective focal length and edge thickness of the third lens, a significant amount of non-effective light will be incident on the edge portions of the second and third lenses, resulting in stray light. Therefore, by constraining 2.17≤R6 / d3s≤3.09, this application can effectively reduce stray light caused by light other than the effective light source, ensuring that the third spacer can effectively intercept stray light, thereby improving the imaging quality. Controlling the curvature radius of the image side of the third lens can adjust the refraction angle of the system light, which helps to improve the edge field illumination and improve the imaging quality. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 A dimensioned diagram of an optical imaging lens according to an alternative embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of the structure of the optical imaging lens of Embodiment 1-1 of this utility model is shown;

[0027] Figure 3 A schematic diagram of the structure of the optical imaging lens of Embodiments 1-2 of this utility model is shown;

[0028] Figures 4 to 6 The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 of this utility model are shown respectively.

[0029] Figure 7 A schematic diagram of the structure of the optical imaging lens of Embodiment 2-1 of this utility model is shown;

[0030] Figure 8 A schematic diagram of the structure of the optical imaging lens of Embodiment 2-2 of this utility model is shown;

[0031] Figures 9 to 11The on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the embodiment two of the utility model are respectively shown;

[0032] Figure 12 The structural schematic diagram of the optical imaging lens of the embodiment 3-1 of the utility model is shown;

[0033] Figure 13 The structural schematic diagram of the optical imaging lens of the embodiment 3-2 of the utility model is shown;

[0034] Figures 14 to 16 The on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the embodiment three of the utility model are respectively shown;

[0035] Figure 17 The structural schematic diagram of the optical imaging lens of the embodiment 4-1 of the utility model is shown;

[0036] Figure 18 The structural schematic diagram of the optical imaging lens of the embodiment 4-2 of the utility model is shown;

[0037] Figures 19 to 21 The on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the embodiment four of the utility model are respectively shown;

[0038] Figure 22 And Figure 23 The optical path diagram and the stray light energy diagram of an optional example of the optical imaging lens satisfying 18.11≤f3 / EP23≤-15.67 and R6 / d3s=1.9 are respectively shown;

[0039] Figure 24 And Figure 25 The optical path diagram and the stray light energy diagram of an optional example of the optical imaging lens satisfying 18.11≤f3 / EP23≤-15.67 and R6 / d3s=2.1 are respectively shown;

[0040] Figure 26 And Figure 27 The optical path diagram and the stray light energy diagram of an optional example of the optical imaging lens satisfying 18.11≤f3 / EP23≤-15.67 and R6 / d3s=2.28 are respectively shown;

[0041] Figure 28 And Figure 29 The optical path diagram and the stray light energy diagram of an optional example of the optical imaging lens satisfying 18.11≤f3 / EP23≤-15.67 and R6 / d3s=3.09 are respectively shown;

[0042] Figure 30 And Figure 31The optical path diagram and the stray light energy diagram of the optical imaging lens of one optional example are shown when 18.11≤f3 / EP23≤-15.67 and R6 / d3s=3.3 are satisfied, respectively.

[0043] In the drawings:

[0044] P0, lens barrel; E1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; E6, sixth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; E7, seventh lens; S13, object side surface of the seventh lens; S14, image side surface of the seventh lens; P1, first spacer; P2, second spacer; P3, third spacer; P4, fourth spacer; P5, fifth spacer; P6, sixth spacer. DETAILED DESCRIPTION

[0045] It should be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0046] It should be noted that, unless otherwise specified, all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled person in the technical field to which the present application belongs.

[0047] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves. Similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0048] It should be noted that, in the present 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, 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.

[0049] 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.

[0050] In this document, 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 judgment of the surface shape in the paraxial region can be based on the judgment method of those skilled in the art, with R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) positive and negative judgment of convex and concave. In terms of the object side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; in terms of the image side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex. In this application, the left side is the object side and the right side is the image side.

[0051] In order to solve the problem of increasing intermediate stray light caused by meeting small size in the prior art seven-piece optical imaging lens, the utility model provides an optical imaging lens.

[0052] As Figures 1 to 31 shown, in an optional embodiment of the present application, the optical imaging lens includes a lens barrel and a lens group and at least one spacer disposed in the lens barrel, the lens group is composed of seven lenses, the seven lenses are sequentially the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens from the object side to the image side; the at least one spacer includes the second spacer disposed between the second lens and the third lens and in contact with the image side surface part of the second lens, and the third spacer disposed between the third lens and the fourth lens and in contact with the image side surface part of the third lens; the effective focal length f3 of the third lens and the axial interval EP23 between the second spacer and the third spacer satisfy: -18.12≤f3 / EP23≤-15.67; the curvature radius R6 of the image side surface of the third lens and the inner diameter d3s of the object side surface of the third spacer satisfy: 2.17≤R6 / d3s≤3.09.

[0053] The optical imaging lens of the present application is composed of a lens barrel and seven lenses and multiple spacers arranged in the lens barrel. By reasonably arranging the positions of the seven lenses, the second spacer and the third spacer, and by setting the optical imaging lens to satisfy -18.12≤f3 / EP23≤-15.67, by controlling the ratio of the focal length of the third lens to the axial interval between the second spacer and the third spacer, the effective focal length of the third lens is controlled not to be too large, at the same time, the edge thickness of the third lens is constrained in a small range, which is beneficial to compress the size of the intermediate structure, so that the arrangement of the intermediate structure of the optical imaging lens is more compact, which is beneficial to meet the miniaturization. However, in the case of controlling the effective focal length and the edge thickness of the third lens, more non-effective light will be incident to the edge part of the second lens and the third lens to produce stray light. Therefore, by constraining 2.17≤R6 / d3s≤3.09, the stray light caused by the light other than the effective light can be effectively reduced, the third spacer can effectively intercept the stray light, so as to improve the imaging quality, and the curvature radius of the image side of the third lens can adjust the refraction angle of the system light, which is helpful to improve the edge field illumination and improve the imaging quality.

[0054] In addition, with reference to Table 1 shown below, Figures 22 to 31 under the premise that the optical imaging lens satisfies -18.12≤f3 / EP23≤-15.67, for example, f3 / EP23=-15.67 or f3 / EP23=-17.70. Figure 22 and Figure 23 respectively show the optical path diagram and the stray light energy diagram of the optical imaging lens satisfying R6 / d3s=1.9. Figure 24 and Figure 25 respectively show the optical path diagram and the stray light energy diagram of the optical imaging lens satisfying R6 / d3s=2.1. Figure 26 and Figure 27 respectively show the optical path diagram and the stray light energy diagram of the optical imaging lens satisfying R6 / d3s=2.28. Figure 28 and Figure 29 respectively show the optical path diagram and the stray light energy diagram of the optical imaging lens satisfying R6 / d3s=3.09. Figure 30 and Figure 31 respectively show the optical path diagram and the stray light energy diagram of the optical imaging lens satisfying R6 / d3s=3.3.

[0055] by Figures 22 to 31It can be seen that when -18.12≤f3 / EP23≤-15.67, R6 / d3s=1.9 and R6 / d3s=2.1 are satisfied, the intermediate structure causes an increase in stray light, the stray light energy is strong, and the performance is poor. When -18.12≤f3 / EP23≤-15.67, R6 / d3s=2.28 is satisfied, the stray light energy is weakened, the stray light is improved, and the performance is better. When -18.12≤f3 / EP23≤-15.67, R6 / d3s=3.3 is satisfied, the intermediate structure causes more stray light, the stray light energy is strong, and the performance is poor. When -18.12≤f3 / EP23≤-15.67, R6 / d3s=3.09 is satisfied, compared with -18.12≤f3 / EP23≤-15.67, R6 / d3s=3.3, the stray light is improved. It can be seen that when -18.12≤f3 / EP23≤-15.67 and R6 / d3s is in the range of 2.17 to 3.09, the stray light of the optical imaging lens is best improved, and the smaller the value of R6 / d3s than the lower limit value of the present application, the stronger the stray light energy; the larger the value of R6 / d3s than the upper limit value of the present application, the stronger the stray light energy. Therefore, by constraining 2.17≤R6 / d3s≤3.09, the present application reasonably constrains the ratio range of the curvature radius of the image side surface of the third lens to the inner diameter of the object side surface of the third spacer, which can effectively reduce the stray light caused by light other than effective light, ensure that the third spacer can effectively intercept stray light, thereby improving the imaging quality, and controlling the curvature radius of the image side surface of the third lens can adjust the refraction angle of the system light, which helps to improve the edge field illumination and improve the imaging quality.

[0056] Table 1

[0057] Example 1 Example 2 Example 3 Example 4 Example 5 Conditional R6 / d3s = 1.9 R6 / d3s = 2.1 R6 / d3s = 2.28 R6 / d3s = 3.09 R6 / d3s = 3.3 Optical path diagram Figure 22 Figure 24 Figure 26 Figure 28 Figure 30 Stray light energy diagram Figure 23 Figure 25 Figure 27 Figure 29 Figure 31 Stray light energy intensity 1.73e -6 ]]> 1.17e -6 ]]> 5.08e -7 ]]> 6.8e -6 ]]> 2.79e -5 ]]

[0058] In the present embodiment, the at least one spacer further comprises a first spacer disposed between the first lens and the second lens and in partial contact with the image side surface of the first lens, a fourth spacer disposed between the fourth lens and the fifth lens and in partial contact with the image side surface of the fourth lens, a fifth spacer disposed between the fifth lens and the sixth lens and in partial contact with the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and in partial contact with the image side surface of the sixth lens.

[0059] In the embodiment, the radius of curvature R2 of the image side surface of the first lens, the refractive index N1 of the first lens, the outer diameter D1s of the object side surface of the first spacer, and the inner diameter d1s of the object side surface of the first spacer satisfy: 1.89≤R2×N1 / (D1s-d1s)≤2.67. By controlling the radius of curvature of the image side surface of the first lens, the refraction angle of the light beam at the first lens can be effectively controlled, which is conducive to reducing the rear end size of the optical imaging lens. By controlling the inner diameter of the object side surface of the first spacer, the light path of the chief ray of the optical system in the second lens can be effectively controlled, which is conducive to improving the imaging quality of the optical imaging lens.

[0060] In the embodiment, the effective focal length f1 of the first lens and the axial interval EP01 between the object side end surface of the barrel and the first spacer satisfy: 6.00≤f1 / EP01≤6.63. By controlling the conditional expression, the optical power of the first lens in the optical system can be effectively distributed, and the chromatic aberration of the optical imaging lens can be balanced under the premise of ensuring the edge field illumination.

[0061] In the embodiment, the radius of curvature R3 of the object side surface of the second lens, the refractive index N2 of the second lens, the outer diameter D1m of the image side surface of the first spacer, and the inner diameter d1m of the image side surface of the first spacer satisfy: 1.60≤R3×N2 / (D1m-d1m)≤2.05. By controlling the conditional expression, the deformation problem of the spacer after etching extinction can be effectively avoided, and the thickness of the second lens can be effectively controlled to ensure that the air interval of the second lens and the front and rear lenses is within a certain range, and the molding difficulty of the second lens is reduced.

[0062] In the embodiment, the radius of curvature R4 of the image side surface of the second lens and the inner diameter d2s of the object side surface of the second spacer satisfy: 5.77≤R4 / d2s≤7.66. By controlling the conditional expression, the sensitivity of the optical system can be reduced, the second lens has good processability, and the inner diameter of the object side surface of the second spacer can be controlled to effectively block stray light generated by reflection of light outside the field at the rear end edge mechanism, which is conducive to improving the definition of large image surface quality and improving the picture quality.

[0063] In the embodiment, the effective focal length f2 of the second lens and the axial interval EP12 between the first spacer and the second spacer satisfy: 32.29≤f2 / EP12≤35.52. By controlling the conditional expression, the focal length ratio of the second lens can be reasonably distributed, the optical imaging lens can be better balanced, and the resolving power of the system can be improved.

[0064] In the embodiment, the central thickness CT3 of the third lens on the optical axis, the maximum axial thickness CP3 of the third spacer, and the air interval T23 of the second lens and the third lens on the optical axis satisfy: 2.83≤(CT3+CP3) / T23≤4.98. By controlling the central thickness of the third lens, the thickness-to-thinness ratio of the third lens is reduced, the appearance and stray light problems caused by excessively large values are avoided, the overall yield of the optical imaging lens is effectively improved, and by controlling the thickness of the third spacer, the field curvature size can be adjusted by adjusting the thickness of the spacer, the resolution is improved, and the imaging quality of the optical imaging lens is improved.

[0065] In the embodiment, the curvature radius R7 of the object side surface of the fourth lens and the outer diameter D3m of the image side surface of the third spacer satisfy: 2.20≤R7 / D3m≤9.70. By controlling the range of the ratio, the refraction angle of the system light beam at the fourth lens can be effectively controlled, the chromatic aberration of the optical imaging lens is balanced under the premise of ensuring the edge field illumination, and by restricting the outer diameter of the image side surface of the third spacer through the ratio range, the assembly stability can be ensured while the outer diameter is controlled.

[0066] In the embodiment, the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side surface of the fourth spacer, and the inner diameter d4s of the object side surface of the fourth spacer satisfy: 2.28≤R8 / (D4s-d4s)≤4.80. By controlling the curvature radius of the image side surface of the fourth lens, the light ray angle of the edge field can be controlled within a reasonable range, the sensitivity of the system can be reduced, and by controlling the inner and outer diameters of the fourth spacer, the fourth spacer can effectively block stray light other than effective light, and the imaging quality is improved.

[0067] In the embodiment, the curvature radius R9 of the object side surface of the fifth lens and the inner diameter d4m of the image side surface of the fourth spacer satisfy: -2.47≤R9 / d4m≤-1.54. By controlling the ratio range, the inner diameter of the image side surface of the fourth spacer is controlled, and the fourth spacer can effectively block the invalid light reflected in the edge mechanism part of the fifth lens, and the possibility of stray light is reduced.

[0068] In the embodiment, the outer diameter D5s of the object side surface of the fifth spacer and the curvature radius R10 of the image side surface of the fifth lens satisfy: -3.18≤D5s / R10≤-2.00. By reasonably controlling the ratio range of the outer diameter of the fifth spacer and the curvature radius of the image side surface of the fifth lens, the angle between the chief ray and the optical axis when the chief ray is incident on the imaging surface is reduced, and the illumination of the imaging surface is improved.

[0069] In the embodiment, the sixth lens satisfies: -2.58≤R12 / R11≤-0.29 between the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens; the sixth lens satisfies: 1.50≤(CP5+EP56) / CT6≤3.11 between the central thickness CT6 of the sixth lens on the optical axis, the maximum axial thickness CP5 of the fifth spacer, and the axial interval EP56 between the fifth spacer and the sixth spacer. Controlling R12 / R11 in this range can effectively distribute the optical power of the sixth lens in the optical system, balance the optical system aberration, control the position distribution of the fifth lens and the sixth lens, reasonably constrain the fifth spacer and the axial interval between the fifth spacer and the sixth spacer, effectively reduce the assembly sensitivity, and improve the stability of the optical imaging lens in high temperature and high humidity.

[0070] In the embodiment, the sixth spacer satisfies: 2.51≤d6m / R13≤3.21 between the inner diameter d6m of the image side surface of the sixth spacer and the curvature radius R13 of the object side surface of the seventh lens. This relationship is conducive to controlling the inner diameter of the image side surface of the sixth spacer, reducing the light incidence angle, and improving the imaging plane illuminance.

[0071] In the embodiment, the first lens has positive optical power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the third lens has negative optical power, the image side surface of the third lens is concave; the sixth lens has negative optical power, the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is concave; and the seventh lens has negative optical power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. By constraining the optical power and surface shape of the key first lens, third lens, sixth lens, and seventh lens, the light incidence angle and exit angle can be controlled, the light path can be planned, the light transition can be ensured to be smooth, the front and rear aberrations can be balanced, and the imaging quality can be improved.

[0072] In the embodiment, the second lens has positive optical power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the fourth lens has negative optical power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave; and the fifth lens has positive optical power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex. By constraining the optical power and surface shape of the second lens, fourth lens, and fifth lens in the middle, the light path can be controlled, the front and rear positive and negative aberrations can be offset, and the imaging quality can be ensured.

[0073] Optionally, the optical imaging lens in the embodiment of the present application can be simulated by software and / or tools such as ZEMAX, CODEV, etc. In the process of simulation by software and / or tools such as the above, the surface shape of each lens can be simulated according to the surface shape provided by the software and / or tools used, and appropriate adjustment can be made.

[0074] In another optional embodiment of the present application, an optical imaging lens is also provided, comprising a lens barrel, a lens set arranged in the lens barrel, and at least one spacer, the lens set is composed of seven lenses, the seven lenses are sequentially arranged from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has negative refractive power, the fifth lens has positive refractive power, the sixth lens has negative refractive power, and the seventh lens has negative refractive power; the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; the at least one spacer comprises a second spacer arranged between the second lens and the third lens and partially in contact with the image side surface of the second lens, and a third spacer arranged between the third lens and the fourth lens and partially in contact with the image side surface of the third lens; the effective focal length f3 of the third lens and the axial interval EP23 between the second spacer and the third spacer satisfy: -18.12≤f3 / EP23≤-15.67; the curvature radius R4 of the image side surface of the second lens and the inner diameter d2s of the object side surface of the second spacer satisfy: 5.77≤R4 / d2s≤7.66.

[0075] The optical imaging lens of the present application is composed of a lens barrel, seven lenses and multiple spacers arranged in the lens barrel. By reasonably arranging the positions of the seven lenses, the second spacer and the third spacer, and by setting the optical imaging lens to satisfy -18.12≤f3 / EP23≤-15.67, the ratio of the focal length of the third lens and the axial interval between the second spacer and the third spacer is controlled, which is beneficial to control the effective focal length of the third lens not to be too large, and at the same time, the edge thickness of the third lens is constrained in a small range, which is beneficial to compress the size of the intermediate structure, so that the arrangement of the intermediate structure of the optical imaging lens is more compact, which is beneficial to meet the miniaturization. However, in the case of controlling the effective focal length and the edge thickness of the third lens, more non-effective light rays will be incident to the edge part of the second lens and the third lens, thereby producing stray light. Therefore, by constraining 5.77≤R4 / d2s≤7.66, the sensitivity of the optical system is reduced, the second lens has good processability, the inner diameter of the object side surface of the second spacer is controlled, the stray light generated by the reflection of the light outside the field of view in the edge mechanism part of the rear end is effectively shielded, the clarity of the large image surface quality is improved, and the picture quality is improved.

[0076] Of course, the present embodiment can also include other parameter formulas in the above embodiments, which will not be described here.

[0077] In another optional embodiment of this application, an optical imaging lens is also provided, including a lens barrel and a lens group and at least one spacer disposed in the lens barrel. The lens group consists of seven lenses, which are arranged sequentially from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has positive optical power, the second lens has positive optical power, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, and the seventh lens has negative optical power. The object side of the first lens is convex, and the image side is concave; the object side of the second lens is convex, and the image side is concave; the image side of the third lens is concave; the object side of the fourth lens is convex, and the image side is concave; the object side of the fifth lens is convex, and the image side is concave; the object side of the fifth lens is convex, and the image side is concave; the object side of the second lens is convex, and the image side is concave; the object side of the third lens is concave; the object side of the fourth lens is convex, and the image side is concave; the object side of the fifth lens is convex, and the image side is concave; the object side of the fifth lens is convex, and the image side is concave; the object side of the second lens is convex, and the image side of the third lens is concave; the object side of the fourth lens is convex, and the image side of the fifth lens is concave; the object side of the fifth lens is convex, and the image side of the sixth ... The object side of the sixth lens is concave, and the image side is convex; the object side of the seventh lens is concave, and the image side is concave; at least one spacer includes a second spacer placed between the second and third lenses and in contact with the image side portion of the second lens, and a third spacer placed between the third and fourth lenses and in contact with the image side portion of the third lens; the center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second and third lenses on the optical axis, and the air gap T34 between the third and fourth lenses on the optical axis satisfy: 0.28≤CT3 / (T23+T34)≤0.35; the effective focal length f3 of the third lens and the inner diameter d3s of the object side of the third spacer satisfy: -3.79≤f3 / d3s≤-3.39.

[0078] The optical imaging lens of this application consists of a lens barrel and seven lenses and multiple spacers disposed within the lens barrel. By rationally arranging the positions of the seven lenses, the second spacer, and the third spacer, and setting the optical imaging lens to 0.28≤CT3 / (T23+T34)≤0.35 and -3.79≤f3 / d3s≤-3.39, the overall structure is made more compact by compressing the intermediate structural spacing, thus meeting the requirements of miniaturization. By controlling the ratio range between the effective focal length of the third lens and the inner diameter of the object side surface of the third spacer, it is beneficial to keep the inner diameter of the object side surface of the third spacer within a reasonable range, thereby ensuring that the third spacer can block and intercept more stray light from the edges, thereby optimizing the imaging quality.

[0079] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0080] Optionally, the aforementioned optical imaging lens may also include protective glass for protecting the photosensitive element located on the imaging surface.

[0081] The optical imaging lens in the present application can adopt multiple lenses, for example, seven lenses as described above. In the present application, at least one of the lens surfaces of each lens is an aspheric lens surface. The aspheric lens has the characteristic that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspheric lens has better curvature radius characteristics, and has the advantages of improving the distortion aberration and improving the astigmatism aberration. After adopting the aspheric lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0082] 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 seven lenses are described as an example in the embodiments, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens can also include other numbers of lenses.

[0083] Figure 1 The size annotation diagram of one optical imaging lens of the present application is shown, Figure 1 The parameters D5s, D4s, D1s, d4s, d3s, d1s, d2s, d1m, D1m, D3m, d4m, d6m, CP3, CP5, EP01, EP12, EP23, EP56 and the like are marked in the figure, so that the meaning of the parameters can be clearly and intuitively understood. In order to facilitate the description of the optical imaging lens and the surface shape of the specific lens, these parameters will not be embodied in the figure when the specific embodiments are described below.

[0084] The specific surface shape and parameters of the optical imaging lens applicable to the above-described embodiments will be further described below with reference to the accompanying drawings.

[0085] It should be noted that there are two examples of embodiment 1-1 and embodiment 1-2 in the following embodiment one, there are two examples of embodiment 2-1 and embodiment 2-2 in the following embodiment two, there are two examples of embodiment 3-1 and embodiment 3-2 in the following embodiment three, and there are two examples of embodiment 4-1 and embodiment 4-2 in the following embodiment four. The curvature radius, central thickness and the like of the first lens to the seventh lens of the optical imaging lens in the two examples in the same embodiment are the same, but the thickness, inner diameter and outer diameter of the lens barrel, the first spacer to the sixth spacer are different. Or, the main structure for imaging is the same, and the auxiliary structure for imaging is different.

[0086] It should be noted that any one of the following embodiments one to four is applicable to all embodiments of the present application.

[0087] Embodiment One

[0088] As shown in Table 1, an optical imaging lens of Embodiment One is described. Figures 2 to 6 Figure 2 A structural schematic diagram of the optical imaging lens of Embodiment 1-1 is shown in Table 2. Figure 3 A structural schematic diagram of the optical imaging lens of Embodiment 1-2 is shown in Table 3.

[0089] As shown in Table 1, an optical imaging lens of Embodiment One is described. Figure 2 Figure 3 The optical imaging lens includes a lens barrel P0 and, arranged in the lens barrel P0 in order from an object side to an image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0090] As shown in Table 2, a structural schematic diagram of the optical imaging lens of Embodiment 1-1 is shown. In this example, the image side of the sixth spacer P6 is further provided with a sixth auxiliary spacer. The object side and the image side of the first spacer P1 are partially in contact with the image side S2 of the first lens and the object side S3 of the second lens, respectively. The object side and the image side of the second spacer P2 are partially in contact with the image side S4 of the second lens and the object side S5 of the third lens, respectively. The object side and the image side of the third spacer P3 are partially in contact with the image side S6 of the third lens and the object side S7 of the fourth lens, respectively. The object side and the image side of the fourth spacer P4 are partially in contact with the image side S8 of the fourth lens and the object side S9 of the fifth lens, respectively. The object side and the image side of the fifth spacer P5 are partially in contact with the image side S10 of the fifth lens and the object side S11 of the sixth lens, respectively. The object side and the image side of the sixth spacer P6 are partially in contact with the image side S12 of the sixth lens and the object side of the sixth auxiliary spacer, and the image side of the sixth auxiliary spacer is partially in contact with the object side S13 of the seventh lens. Figure 2 As shown in Table 3, a structural schematic diagram of the optical imaging lens of Embodiment 1-2 is shown. The difference between this example and Embodiment 1-1 is that the image side of the fifth spacer P5 is further provided with a fifth auxiliary spacer, and at this time, the image side of the fifth spacer P5 is partially in contact with the object side of the fifth auxiliary spacer, and the image side of the fifth auxiliary spacer is partially in contact with the object side S11 of the sixth lens. The abutting contact modes of the remaining spacers are the same as those of Embodiment 1-1, and reference can be made to the related description in Embodiment 1-1, which will not be described here.

[0091] Figure 3 As shown in Table 3, a structural schematic diagram of the optical imaging lens of Embodiment 1-2 is shown. The difference between this example and Embodiment 1-1 is that the image side of the fifth spacer P5 is further provided with a fifth auxiliary spacer, and at this time, the image side of the fifth spacer P5 is partially in contact with the object side of the fifth auxiliary spacer, and the image side of the fifth auxiliary spacer is partially in contact with the object side S11 of the sixth lens. The abutting contact modes of the remaining spacers are the same as those of Embodiment 1-1, and reference can be made to the related description in Embodiment 1-1, which will not be described here.

[0092] In summary, the structural parameters of the optical imaging lens of Embodiment One under Embodiment 1-1 and Embodiment 1-2 are shown in Table 2 and Table 3.​​​

[0093] Table 2

[0094]

[0095]

[0096] In embodiment one, the object side S1 of the first lens is convex, the image side S2 of the first lens is concave. The object side S3 of the second lens is convex, the image side S4 of the second lens is concave. The object side S5 of the third lens is convex, the image side S6 of the third lens is concave. The object side S7 of the fourth lens is convex, the image side S8 of the fourth lens is concave. The object side S9 of the fifth lens is concave, the image side S10 of the fifth lens is convex. The object side S11 of the sixth lens is concave, the image side S12 of the sixth lens is concave. The object side S13 of the seventh lens is convex, the image side S14 of the seventh lens is concave.

[0097] In embodiment one, the effective focal length f1 of the first lens is 5.76mm, the effective focal length f2 of the second lens is 8.59mm, the effective focal length f3 of the third lens is -7.99mm, the effective focal length f4 of the fourth lens is -16.07mm, the effective focal length f5 of the fifth lens is 6.22mm, the effective focal length f6 of the sixth lens is -166.13mm, the effective focal length f7 of the seventh lens is -7.84mm.

[0098] Table 3 shows the basic structure parameter table of the optical imaging lens of embodiment one, wherein the units of the curvature radius, thickness / distance are millimeters mm.

[0099] Table 3

[0100]

[0101]

[0102] In embodiment one, the object side and the image side of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0103]

[0104] wherein x is the sag of the aspherical surface at a position along the optical axis at a height h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above; k is the conic constant; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 4 below provides the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspherical surfaces S1-S14 in Embodiment 1.

[0105] Table 4

[0106]

[0107]

[0108] Figure 4 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of convergent focal points of light rays of different wavelengths after passing through the imaging lens. Figure 5 The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 6 The lateral chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of light rays of different wavelengths on the image plane after passing through the optical imaging lens.

[0109] According to Figures 4 to 6 It can be seen that the optical imaging lens of Embodiment 1 can achieve good imaging quality.

[0110] Embodiment 2

[0111] As Figures 7 to 11 shown, the optical imaging lens of Embodiment 2 is described. Figure 7 The structural schematic diagram of the optical imaging lens of Embodiment 2-1 is shown, Figure 8 The structural schematic diagram of the optical imaging lens of Embodiment 2-2 is shown.

[0112] As Figure 7 and Figure 8 shown, the optical imaging lens includes a lens barrel P0 and, arranged in the lens barrel P0 in order from the object side to the image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0113] As Figure 7As shown in Fig. 2-1, it is a structure schematic diagram of the optical imaging lens in Example 2-1. In this example, the object side and image side of the first spacer P1 are partially in contact with the image side S2 of the first lens and the object side S3 of the second lens respectively. The object side and image side of the second spacer P2 are partially in contact with the image side S4 of the second lens and the object side S5 of the third lens respectively. The object side and image side of the third spacer P3 are partially in contact with the image side S6 of the third lens and the object side S7 of the fourth lens respectively. The object side and image side of the fourth spacer P4 are partially in contact with the image side S8 of the fourth lens and the object side S9 of the fifth lens respectively. The object side and image side of the fifth spacer P5 are partially in contact with the image side S10 of the fifth lens and the object side S11 of the sixth lens respectively. The object side and image side of the sixth spacer P6 are partially in contact with the image side S12 of the sixth lens and the object side S13 of the seventh lens respectively.

[0114] As shown in Fig. 2-2, it is a structure schematic diagram of the optical imaging lens in Example 2-2. The difference between this example and Example 2-1 is that the image side of the fourth spacer P4 is further provided with a fourth auxiliary spacer, at this time, the image side of the fourth spacer P4 is partially in contact with the object side of the fourth auxiliary spacer, and the image side of the fourth auxiliary spacer is partially in contact with the object side S9 of the fifth lens. The abutting contact mode of the rest of the spacers is the same as that in Example 2-1, which can be referred to the related description in Example 2-1, and will not be described here. Figure 8

[0115] In summary, the structure parameters of the optical imaging lens in Example 2 under Example 2-1 and Example 2-2 are shown in Table 5.

[0116] Table 5

[0117]

[0118]

[0119] In Example 2, the object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface. The object side S3 of the second lens is a convex surface, and the image side S4 of the second lens is a concave surface. The object side S5 of the third lens is a convex surface, and the image side S6 of the third lens is a concave surface. The object side S7 of the fourth lens is a convex surface, and the image side S8 of the fourth lens is a concave surface. The object side S9 of the fifth lens is a concave surface, and the image side S10 of the fifth lens is a convex surface. The object side S11 of the sixth lens is a concave surface, and the image side S12 of the sixth lens is a concave surface. The object side S13 of the seventh lens is a convex surface, and the image side S14 of the seventh lens is a concave surface.

[0120] ​In embodiment two, the effective focal length f1 of the first lens is 5.77 mm, the effective focal length f2 of the second lens is 8.87 mm, the effective focal length f3 of the third lens is -7.81 mm, the effective focal length f4 of the fourth lens is -21.46 mm, the effective focal length f5 of the fifth lens is 7.28 mm, the effective focal length f6 of the sixth lens is -117.96 mm, and the effective focal length f7 of the seventh lens is -9.67 mm.

[0121] Table 6 shows the basic structure parameter table of the optical imaging lens of embodiment two, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0122] Table 6

[0123]

[0124]

[0125] The following table 7 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 of the aspherical surfaces S1-S14 that can be used in embodiment two.

[0126] Table 7

[0127] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.3451E-03 1.6105E-03 1.6790E-04 -2.8633E-05 -2.5881E-05 -7.0221E-06 -1.8432E-06 S2 1.8045E-02 7.5378E-03 -1.7290E-03 -4.7005E-04 -1.6297E-04 -1.0955E-05 4.3837E-06 S3 -7.1595E-03 1.1756E-02 -1.0466E-03 -3.5010E-04 -1.6161E-04 -1.0213E-05 1.0838E-05 S4 -2.0281E-02 6.3023E-03 -7.1332E-04 -1.4149E-04 -2.5268E-04 -2.7891E-05 3.1185E-05 S5 4.2963E-04 -1.8869E-04 -1.0784E-03 -4.2522E-05 -2.5613E-04 -8.9757E-06 2.1392E-05 S6 3.8932E-02 1.7220E-03 3.7658E-04 2.0054E-04 -7.0891E-05 3.2222E-06 1.6003E-06 S7 -2.5079E-01 -7.8090E-03 2.4624E-03 2.0760E-03 2.5317E-04 -1.3625E-04 -1.5746E-04 S8 -4.1864E-01 1.4220E-02 9.9893E-03 2.2273E-03 -7.8566E-04 -3.7141E-04 -3.6468E-04 S9 -1.5242E-01 9.0873E-02 -1.1634E-02 -5.8468E-03 1.1815E-03 6.9097E-04 -1.0626E-03 S10 -2.3879E-01 1.5185E-01 -2.2454E-02 -1.5143E-03 2.3136E-03 3.3128E-04 -1.8808E-03 S11 -2.2243E-01 -1.3190E-01 2.0906E-02 -7.9232E-03 1.3075E-02 8.0098E-05 -8.0119E-04 S12 -3.0028E-01 4.1148E-02 4.6963E-04 -9.5223E-03 8.0093E-03 -5.7558E-03 1.5255E-03 S13 -3.1661E+00 1.0262E+00 -2.7356E-01 3.6135E-02 4.0948E-03 4.5032E-04 -4.5917E-03 S14 -6.5997E+00 1.4623E+00 -4.5625E-01 1.5570E-01 -5.3384E-02 2.8292E-02 -1.4588E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 7.1403E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.1748E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.6118E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.7395E-05 6.0780E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.1705E-05 4.0946E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 7.6757E-07 8.1749E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -4.2704E-05 -1.5258E-05 3.4847E-06 1.6422E-06 4.1666E-07 -1.0851E-06 0.0000E+00 S8 -8.9340E-05 3.3317E-06 6.4777E-06 1.5409E-05 -3.3849E-06 1.4783E-06 -1.4600E-06 S9 2.3758E-04 7.6459E-05 -1.2830E-04 2.9548E-05 -2.2813E-06 -3.0435E-06 -4.4971E-06 S10 5.5750E-04 1.9972E-04 -2.2618E-04 4.2890E-05 1.9370E-05 -3.0142E-06 -4.9400E-06 S11 7.7089E-04 6.6529E-05 -3.5902E-04 3.2854E-05 -1.6685E-04 -2.4583E-05 -1.3638E-05 S12 1.7391E-03 -1.6616E-03 1.2944E-04 5.3712E-04 -4.1641E-04 1.2624E-04 -7.7070E-06 S13 2.3751E-03 1.7923E-03 -2.4724E-03 6.6514E-04 4.0912E-04 -3.3979E-04 8.4575E-05 S14 3.8398E-03 -7.5362E-05 -6.2129E-04 3.9972E-04 -7.8175E-07 1.7011E-04 -1.0003E-04

[0128] Figure 9 The axial chromatic aberration curve of the optical imaging lens of embodiment two is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Figure 10 The astigmatism curve of the optical imaging lens of embodiment two is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 11 The magnification chromatic aberration curve of the optical imaging lens of embodiment two is shown, which represents the deviation of light rays at different image heights on the imaging surface after passing through the optical imaging lens.

[0129] According to Figures 9 to 11 It can be seen that the optical imaging lens given in embodiment two can achieve good imaging quality.

[0130] Embodiment three

[0131] As Figures 12 to 16 shown, the optical imaging lens of embodiment three is described. Figure 12 The structural schematic diagram of the optical imaging lens of embodiment 3-1 is shown, Figure 13 The structural schematic diagram of the optical imaging lens of embodiment 3-2 is shown.

[0132] As Figure 12 and Figure 13As shown, the optical imaging lens includes a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7, which are arranged sequentially from the object side to the image side in the lens barrel P0.

[0133] like Figure 12 The diagram shows a schematic of the optical imaging lens in Embodiment 3-1. In this example, the object-side and image-side of the first spacer P1 are in partial contact with the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer P2 are in partial contact with the image-side S4 of the second lens and the object-side S5 of the third lens, respectively. The object-side and image-side of the third spacer P3 are in partial contact with the image-side S6 of the third lens and the object-side S7 of the fourth lens, respectively. The object-side and image-side of the fourth spacer P4 are in partial contact with the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively. The object-side and image-side of the fifth spacer P5 are in partial contact with the image-side S10 of the fifth lens and the object-side S11 of the sixth lens, respectively. The object-side and image-side of the sixth spacer P6 are in partial contact with the image-side S12 of the sixth lens and the object-side S13 of the seventh lens, respectively.

[0134] like Figure 13 The diagram shown is a structural schematic of the optical imaging lens in Embodiment 3-2. The difference between this example and Embodiment 3-1 is that a fourth auxiliary spacer is also provided on the image side of the fourth spacer P4. In this case, the image side of the fourth spacer P4 is in contact with the object side of the fourth auxiliary spacer, and the image side of the fourth auxiliary spacer is in contact with the object side S9 of the fifth lens. The bearing and contact methods of the remaining spacers are the same as in Embodiment 3-1, and can be referred to the relevant description in Embodiment 3-1, which will not be repeated here.

[0135] In summary, the structural parameters of the optical imaging lens of Embodiment 3 under Embodiments 3-1 and 3-2 are shown in Table 8.

[0136] Table 8

[0137]

[0138]

[0139] In embodiment three, the object side S1 of the first lens is convex, the image side S2 of the first lens is concave. The object side S3 of the second lens is convex, the image side S4 of the second lens is concave. The object side S5 of the third lens is concave, the image side S6 of the third lens is concave. The object side S7 of the fourth lens is convex, the image side S8 of the fourth lens is concave. The object side S9 of the fifth lens is concave, the image side S10 of the fifth lens is convex. The object side S11 of the sixth lens is concave, the image side S12 of the sixth lens is concave. The object side S13 of the seventh lens is convex, the image side S14 of the seventh lens is concave.

[0140] In embodiment three, the effective focal length f1 of the first lens is 6.16mm, the effective focal length f2 of the second lens is 7.61mm, the effective focal length f3 of the third lens is -8.87mm, the effective focal length f4 of the fourth lens is -20.69mm, the effective focal length f5 of the fifth lens is 8.86mm, the effective focal length f6 of the sixth lens is -100.31mm, the effective focal length f7 of the seventh lens is -9.34mm.

[0141] Table 9 shows the basic structure parameter table of the optical imaging lens of embodiment three, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0142] Table 9

[0143]

[0144] The following table 10 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 of the aspherical surfaces S1-S14 that can be used in embodiment three.

[0145] Table 10

[0146]

[0147]

[0148] Figure 14 The axial chromatic aberration curve of the optical imaging lens of embodiment three is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Figure 15 The astigmatism curve of the optical imaging lens of embodiment three is shown, which represents the meridional image surface bending and sagittal image surface bending. Figure 16 The magnification chromatic aberration curve of the optical imaging lens of embodiment three is shown, which represents the deviation of light rays at different image heights on the imaging surface after passing through the optical imaging lens.

[0149] According to Figures 14 to 16It can be seen that the optical imaging lens provided in Embodiment Three can achieve good imaging quality.

[0150] Embodiment Four

[0151] As shown in Figures 17 to 21 , the optical imaging lens of Embodiment Four is described. Figure 17 A structural schematic diagram of the optical imaging lens of Embodiment 4-1 is shown, Figure 18 A structural schematic diagram of the optical imaging lens of Embodiment 4-2 is shown.

[0152] As shown in Figure 17 and Figure 18 , the optical imaging lens includes a lens barrel P0 and, arranged in the lens barrel P0 in order from the object side to the image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0153] As shown in Figure 17 , a structural schematic diagram of the optical imaging lens of Embodiment 4-1 is shown. In this example, the object side surface and the image side surface of the first spacer P1 are partially in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and the image side surface of the second spacer P2 are partially in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and the image side surface of the third spacer P3 are partially in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively. The object side surface and the image side surface of the fourth spacer P4 are partially in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively. The object side surface and the image side surface of the fifth spacer P5 are partially in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, respectively. The object side surface and the image side surface of the sixth spacer P6 are partially in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens, respectively.

[0154] As shown in Figure 18 , a structural schematic diagram of the optical imaging lens of Embodiment 4-2 is shown. The difference between this example and Embodiment 4-1 is that the image side of the fourth spacer P4 is further provided with a fourth auxiliary spacer, at this time, the image side surface of the fourth spacer P4 is partially in contact with the object side surface of the fourth auxiliary spacer, and the image side surface of the fourth auxiliary spacer is partially in contact with the object side surface S9 of the fifth lens. The abutting contact modes of the remaining spacers are the same as those of Embodiment 4-1, and reference can be made to the related description in Embodiment 4-1, which will not be described herein.

[0155] In summary, the structural parameters of the optical imaging lens of Embodiment Four under Embodiment 4-1 and Embodiment 4-2 are shown in Table 11.

[0156] Table 11

[0157] Parameter / Embodiment 4-1 4-2 d1s (mm) 2.336 2.336 d1m (mm) 2.336 2.336 D1s (mm) 5.570 5.003 d2s (mm) 2.300 2.300 d3s (mm) 2.326 2.326 D3m (mm) 5.770 5.203 d4s (mm) 3.103 2.913 D4s (mm) 5.870 5.303 d4m (mm) 3.103 2.913 D5s (mm) 7.080 6.729 d6m (mm) 5.821 5.821 CP3 (mm) 0.022 0.022 CP5 (mm) 0.022 0.022 EP01 (mm) 0.990 0.990 EP12 (mm) 0.225 0.221 EP23 (mm) 0.441 0.441 EP56 (mm) 0.583 0.583

[0158] In embodiment four, the object side S1 of the first lens is convex, the image side S2 of the first lens is concave. The object side S3 of the second lens is convex, the image side S4 of the second lens is concave. The object side S5 of the third lens is convex, the image side S6 of the third lens is concave. The object side S7 of the fourth lens is convex, the image side S8 of the fourth lens is concave. The object side S9 of the fifth lens is concave, the image side S10 of the fifth lens is convex. The object side S11 of the sixth lens is concave, the image side S12 of the sixth lens is concave. The object side S13 of the seventh lens is convex, the image side S14 of the seventh lens is concave.

[0159] In embodiment four, the effective focal length f1 of the first lens is 5.94 mm, the effective focal length f2 of the second lens is 7.85 mm, the effective focal length f3 of the third lens is -7.89 mm, the effective focal length f4 of the fourth lens is -15.76 mm, the effective focal length f5 of the fifth lens is 6.84 mm, the effective focal length f6 of the sixth lens is -139.48 mm, the effective focal length f7 of the seventh lens is -9.37 mm.

[0160] Table 12 shows the basic structure parameter table of the optical imaging lens of embodiment four, wherein the units of the curvature radius, thickness / distance are millimeters mm.

[0161] Table 12

[0162]

[0163] The following table 13 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 which can be used for each aspheric surface S1-S14 in embodiment four.

[0164] Table 13

[0165]

[0166]

[0167] Figure 19 The on-axis chromatic aberration curve of the optical imaging lens of embodiment four is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Figure 20 The astigmatism curve of the optical imaging lens of embodiment four is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 21The magnification chromatic aberration curve of the optical imaging lens of embodiment four is shown, which represents the deviation of light rays at different image heights on the imaging plane after passing through the optical imaging lens.

[0168] According to Figures 19 to 21 It can be known that the optical imaging lens provided in embodiment four can achieve good imaging quality.

[0169] In summary, embodiments one to four respectively satisfy the relationships shown in table 14.

[0170] Table 14

[0171]

[0172]

[0173] Table 15 shows the effective focal length of each lens of the optical imaging lens of embodiments one to four.

[0174] Table 15

[0175] Parameter / Embodiment One Two Three Four f1 (mm) 5.76 5.77 6.16 5.94 f2 (mm) 8.59 8.87 7.61 7.85 f3 (mm) -7.99 -7.81 -8.87 -7.89 f4 (mm) -16.07 -21.46 -20.69 -15.76 f5 (mm) 6.22 7.28 8.86 6.84 f6 (mm) -166.13 -117.96 -100.31 -139.48 f7 (mm) -7.84 -9.67 -9.34 -9.37

[0176] The present application also provides an imaging device, and the electronic photosensitive element thereof can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate imaging equipment such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0177] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0178] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0179] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings are used only for distinguishing between similar objects and do not necessarily have to describe a specific sequential or chronological order. It is to be understood that the data so distinguished can be interchanged, under appropriate circumstances, such that the embodiments of the present application described herein can be practiced in other than the illustrated or described order.

[0180] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, 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, comprises a lens barrel and a lens group and at least one spacer disposed in the lens barrel, the lens group consists of seven lenses, the seven lenses are, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the at least one spacer comprises a second spacer disposed between the second lens and the third lens and in contact with a part of the image side surface of the second lens, a third spacer disposed between the third lens and the fourth lens and in contact with a part of the image side surface of the third lens; an axial interval between the effective focal length f3 of the third lens and the second spacer and the third spacer EP23 satisfies: -18.12≤f3 / EP23≤-15.67; a radius of curvature R6 of the image side surface of the third lens and an inner diameter d3s of the object side surface of the third spacer satisfy: 2.17≤R6 / d3s≤3.

09. 2.The optical imaging lens according to claim 1, wherein, the at least one spacer further comprises a first spacer disposed between the first lens and the second lens and in contact with a part of the image side surface of the first lens, a radius of curvature R2 of the image side surface of the first lens, a refractive index N1 of the first lens, an outer diameter D1s of the object side surface of the first spacer and an inner diameter d1s of the object side surface of the first spacer satisfy: 1.89≤R2×N1 / (D1s-d1s)≤2.

67. 3.The optical imaging lens according to claim 1, wherein, the at least one spacer further comprises a first spacer disposed between the first lens and the second lens and in contact with a part of the image side surface of the first lens, an axial interval between the effective focal length f1 of the first lens and the object side end surface of the lens barrel and the first spacer EP01 satisfies: 6.00≤f1 / EP01≤6.

63. 4.The optical imaging lens according to claim 1, wherein, the at least one spacer further comprises a first spacer disposed between the first lens and the second lens and in contact with a part of the image side surface of the first lens, a radius of curvature R3 of the object side surface of the second lens, a refractive index N2 of the second lens, an outer diameter D1m of the image side surface of the first spacer and an inner diameter d1m of the image side surface of the first spacer satisfy: 1.60≤R3×N2 / (D1m-d1m)≤2.

05.

5. The optical imaging lens according to claim 1, characterized in that, a radius of curvature R4 of the image side surface of the second lens and an inner diameter d2s of the object side surface of the second spacer satisfy: 5.77≤R4 / d2s≤7.

66. 6.The optical imaging lens according to claim 1, wherein, the at least one spacer further comprises a first spacer disposed between the first lens and the second lens and in contact with a part of the image side surface of the first lens, an axial interval between the effective focal length f2 of the second lens and the first spacer and the second spacer EP12 satisfies: 32.29≤f2 / EP12≤35.

52. 7.The optical imaging lens according to claim 1, wherein, a central thickness CT3 of the third lens on the optical axis, a maximum axial thickness CP3 of the third spacer and an air interval T23 of the second lens and the third lens on the optical axis satisfy: 2.83≤(CT3+CP3) / T23≤4.

98. 8.The optical imaging lens according to claim 1, wherein, A radius of curvature R7 of an object side surface of the fourth lens and an outer diameter D3m of an image side surface of the third spacer satisfy: 2.20≤R7 / D3m≤9.

70. 9.The optical imaging lens according to claim 1, wherein, The at least one spacer further includes a fourth spacer disposed between the fourth lens and the fifth lens and partially in contact with an image side surface of the fourth lens, A radius of curvature R8 of an image side surface of the fourth lens, an outer diameter D4s of an object side surface of the fourth spacer, and an inner diameter d4s of the object side surface of the fourth spacer satisfy: 2.28≤R8 / (D4s-d4s)≤4.

80. 10.The optical imaging lens according to claim 1, wherein, The at least one spacer further includes a fourth spacer disposed between the fourth lens and the fifth lens and partially in contact with an image side surface of the fourth lens, A radius of curvature R9 of an object side surface of the fifth lens and an inner diameter d4m of an image side surface of the fourth spacer satisfy: -2.47≤R9 / d4m≤-1.

54. 11.The optical imaging lens according to claim 1, wherein, The at least one spacer further includes a fifth spacer disposed between the fifth lens and the sixth lens and partially in contact with an image side surface of the fifth lens, An outer diameter D5s of an object side surface of the fifth spacer and a radius of curvature R10 of an image side surface of the fifth lens satisfy: -3.18≤D5s / R10≤-2.

00. 12.The optical imaging lens according to claim 1, wherein, The at least one spacer further includes a fifth spacer disposed between the fifth lens and the sixth lens and partially in contact with an image side surface of the fifth lens, a sixth spacer disposed between the sixth lens and the seventh lens and partially in contact with an image side surface of the sixth lens, A radius of curvature R11 of an object side surface of the sixth lens and a radius of curvature R12 of an image side surface of the sixth lens satisfy: -2.58≤R12 / R11≤-0.29; a central thickness CT6 of the sixth lens on the optical axis, a maximum axial thickness CP5 of the fifth spacer, and an axial interval EP56 between the fifth spacer and the sixth spacer satisfy: 1.50≤(CP5+EP56) / CT6≤3.

11.

13. The optical imaging lens according to claim 1, characterized in that, The at least one spacer further includes a sixth spacer disposed between the sixth lens and the seventh lens and partially in contact with an image side surface of the sixth lens, An inner diameter d6m of an image side surface of the sixth spacer and a radius of curvature R13 of an object side surface of the seventh lens satisfy: 2.51≤d6m / R13≤3.

21.

14. The optical imaging lens according to any of claims 1-13, wherein, The first lens has positive refractive power, an object side surface of the first lens is convex, and an image side surface of the first lens is concave; the third lens has negative refractive power, an image side surface of the third lens is concave; the sixth lens has negative refractive power, an object side surface of the sixth lens is concave, and an image side surface of the sixth lens is concave; and the seventh lens has negative refractive power, an object side surface of the seventh lens is convex, and an image side surface of the seventh lens is concave.

15. The optical imaging lens according to any one of claims 1-13, wherein, The second lens has positive refractive power, the object side surface of the second lens is convex, and the image side surface is concave; the fourth lens has negative refractive power, the object side surface of the fourth lens is convex, and the image side surface is concave; and the fifth lens has positive refractive power, the object side surface of the fifth lens is concave, and the image side surface is convex.

Images