Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and at least one spacer, and the lens group is composed of seven lenses including 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 fifth spacer and a sixth spacer; f6 / (EP56 + CT6) is greater than or equal to-122.21 and less than or equal to-106.77; and d6s / (R12 / R11) is more than or equal to-3.74 mm <-1 > and less than or equal to-1.73 mm <-1 >. According to the invention, the problem that stray light at the tail end is increased due to the fact that a seven-piece optical imaging lens in the prior art meets low aberration is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical imaging lens. Background Art

[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. In order to match these devices, optical imaging lenses are moving towards small sizes while ensuring imaging quality, which makes the design process more complicated. At present, seven-piece optical imaging lenses usually meet the requirements of high imaging quality by optimizing the optical parameters or size of the rear lens, thereby achieving the purpose of improving the aberration problem, but this easily leads to an increase in stray light at the rear end, affecting the imaging quality.

[0003] That is to say, the seven-element optical imaging lens in the prior art has the problem of increasing stray light at the tail end due to the lack of low aberration. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical imaging lens to solve the problem that the seven-element optical imaging lens in the prior art has low aberration and leads to increased stray light at the tail end.

[0005] To achieve the above-mentioned object, according to one aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel, a lens group and at least one spacer arranged in the lens barrel, wherein the lens group is composed of seven lenses, and the seven lenses are, 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 in order; the at least one spacer comprises a fifth spacer located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the effective focal length f6 of the sixth lens, the center thickness CT6 of the sixth lens on the optical axis and the axial spacing EP56 between the fifth spacer and the sixth spacer satisfy the following conditions: -122.21≤f6 / (EP56+CT6)≤-106.77; the inner diameter d6s of the object side surface of the sixth spacer, 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 satisfy the following conditions: -3.74 mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 .

[0006] According to another aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel, a lens group arranged in the lens barrel, and at least one spacer, wherein the lens group consists of seven lenses, and the seven lenses are, 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 first lens has positive focal power, the second lens has positive focal power, the third lens has negative focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, and the seventh lens has negative focal power; the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the third lens is concave, and the image side surface is concave; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is concave, and the image side surface is convex surface; the object side surface of the sixth lens is concave, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave; at least one spacer includes a fifth spacer located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens; the effective focal length f6 of the sixth lens, the center thickness CT6 of the sixth lens on the optical axis and the axial spacing EP56 between the fifth spacer and the sixth spacer satisfy: -122.21≤f6 / (EP56+CT6)≤-106.77; the effective focal length f5 of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, and the inner diameter d5s of the object side surface of the fifth spacer satisfy: -32.47≤f5 / R10×d5s≤-25.41.

[0007] According to another aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel, a lens group arranged in the lens barrel, and at least one spacer, wherein the lens group consists of seven lenses, and the seven lenses are, 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 first lens has positive focal power, the second lens has positive focal power, the third lens has negative focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, and the seventh lens has negative focal power; the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the third lens is concave, and the image side surface is concave; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is concave , the image side surface is convex; the object side surface of the sixth lens is concave, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave; at least one spacer includes a fifth spacer located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens; the air gap T67 on the optical axis between the sixth lens and the seventh lens, the air gap T45 on the optical axis between the fourth lens and the fifth lens, and the air gap T56 on the optical axis between the fifth lens and the sixth lens satisfy: 0.69≤T67 / (T45+T56)≤0.85; the effective focal length f6 of the sixth lens and the inner diameter d6s of the object side surface of the sixth spacer satisfy: -25.62≤f6 / d6s≤-23.28.

[0008] Further, an inner diameter d0m of the image-side end surface of the lens barrel and a curvature radius R14 of the image-side surface of the seventh lens satisfy: 7.90≤d0m / R14≤8.32.

[0009] Further, an outer diameter D6m of the image side surface of the sixth spacer, 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: 1.36≤(D6m-d6m) / R13≤1.78.

[0010] Further, an air interval T67 between the sixth lens and the seventh lens on the optical axis and a maximum axial thickness CP6 of the sixth spacer satisfy: 14.41≤T67 / CP6≤19.00.

[0011] Further, the effective focal length f5 of the fifth lens, the curvature radius R10 of the image-side surface of the fifth lens, and the inner diameter d5s of the object-side surface of the fifth spacer satisfy: -32.47≤f5 / R10×d5s≤-25.41.

[0012] Furthermore, at least one spacer also includes a fourth spacer located between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, and the effective focal length f5 of the fifth lens, 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: -21.74≤f5 / R9×d4m≤-15.92.

[0013] Further, at least one spacer also includes a fourth spacer located between the fourth lens and the fifth lens and in contact with the image side portion of the fourth lens, and the effective focal length f5 of the fifth lens, the axial spacing EP45 between the fourth spacer and the fifth spacer, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 24.62≤f5 / (EP45+T56)≤40.05.

[0014] Further, at least one spacer also includes a third spacer located between the third lens and the fourth lens and in contact with the image side portion of the third lens, and a fourth spacer located between the fourth lens and the fifth lens and in contact with the image side portion of the fourth lens. The effective focal length f4 of the fourth lens, the air gap T45 between the fourth lens and the fifth lens on the optical axis, and the axial gap EP34 between the third spacer and the fourth spacer satisfy: -246.93≤f4 / (EP34+T45)≤-117.48.

[0015] Furthermore, at least one spacer also includes a third spacer located between the third lens and the fourth lens and partially in contact with the image side surface of the third lens, and the curvature radius R7 of the object side surface of the fourth lens and the inner diameter d3m of the image side surface of the third spacer satisfy: 23.83≤R7 / d3m≤43.38.

[0016] Further, at least one spacer also includes a fourth spacer located between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens and the outer diameter D4s of the object side surface of the fourth spacer satisfy: 5.73≤R8 / D4s≤7.89.

[0017] Furthermore, at least one spacer also includes a second spacer located between the second lens and the third lens and partially in contact with the image side surface of the second lens, and the curvature radius R5 of the object side surface of the third lens and the outer diameter D2m of the image side surface of the second spacer satisfy: -43.38≤R5 / D2m≤-23.31.

[0018] Furthermore, the first lens has positive optical power, the object side surface of the first lens is convex, and the image side surface is concave; the sixth lens has negative optical power, the object side surface of the sixth lens is concave, and the image side surface is concave; the seventh lens has negative optical power, the object side surface of the seventh lens is convex, and the image side surface is concave.

[0019] Furthermore, the second lens has positive focal power, the object side surface of the second lens is convex, and the image side surface is concave; the third lens has negative focal power, the object side surface of the third lens is concave, and the image side surface is concave; the fourth lens has negative focal power, the object side surface of the fourth lens is convex, and the image side surface is concave; the fifth lens has positive focal power, the object side surface of the fifth lens is concave, and the image side surface is convex.

[0020] By applying the technical solution of the present invention, the optical imaging lens of the present application is composed of a lens barrel, seven lenses arranged in the lens barrel, and at least one spacer. By reasonably arranging the positions of the seven lenses, the fifth spacer, and the sixth spacer, and setting the optical imaging lens to meet -122.21≤f6 / (EP56+CT6)≤-106.77, the contribution of the sixth lens to the system coma can be controlled, the coma generated by the front-end element can be effectively balanced, and good imaging quality can be obtained. At the same time, the axial spacing between the fifth lens and the sixth lens is controlled, the physical size and optical performance are balanced, and the ratio of the focal length of the sixth lens to the sum of the center thickness and the edge thickness of the sixth lens is constrained, which is conducive to controlling the focal length of the sixth lens not too long, and the center thickness and edge thickness of the sixth lens can be controlled within a smaller range, avoiding aberration problems caused by excessive focal length or excessive thickness. However, when the focal length of the sixth lens is controlled not too long and the center thickness and edge thickness are small, more ineffective light will enter the edge part of the sixth lens, which is likely to cause an increase in edge stray light of the tail lens and the tail spacer. Therefore, the present application constrains -3.74mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 , the light angle of the edge field of view can be within a reasonable range, which can effectively reduce the sensitivity of the system and effectively avoid the stray light generated by the sixth spacer, thereby achieving the purpose of improving the stray light and helping to improve the imaging quality of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A dimensioning diagram of an optical imaging lens according to an optional embodiment of the present invention is shown;

[0023] Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1-1 of the present invention is shown;

[0024] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 1-2 of the present invention is shown;

[0025] Figures 4 to 6 The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the first embodiment of the present invention are respectively shown;

[0026] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 2-1 of the present invention is shown;

[0027] Figure 8 A schematic structural diagram of an optical imaging lens according to Embodiment 2-2 of the present invention is shown;

[0028] Figures 9 to 11 The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the second embodiment of the present invention are respectively shown;

[0029] Fig.12 A schematic structural diagram of an optical imaging lens according to Embodiment 3-1 of the present invention is shown;

[0030] Fig.13 A schematic structural diagram of an optical imaging lens according to Embodiment 3-2 of the present invention is shown;

[0031] Figures 14 to 16 The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the third embodiment of the present invention are respectively shown;

[0032] Fig.17 A schematic structural diagram of an optical imaging lens according to Embodiment 4-1 of the present invention is shown;

[0033] Fig.18 A schematic structural diagram of an optical imaging lens according to Embodiment 4-2 of the present invention is shown;

[0034] Figures 19 to 21 The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the fourth embodiment of the present invention are respectively shown;

[0035] Fig. 22 and Fig.23 An optional example of an optical imaging lens is shown to satisfy f6 / (EP56+CT6)=-122.21 and d6s / (R12 / R11)=-2.23mm. -1 Light path diagram and stray light energy diagram when

[0036] Fig.24 and Fig.25 An optional example of an optical imaging lens that satisfies f6 / (EP56+CT6)=-122.21 and d6s / (R12 / R11)=-3.9 mm is shown respectively. -1 Light path diagram and stray light energy diagram when

[0037] Fig.26 and Fig. 27 The optical imaging lens of an optional embodiment is shown to satisfy f6 / (EP56+CT6)=-122.21 and d6s / (R12 / R11)=-1.6mm. -1 Light path diagram and stray light energy diagram when

[0038] The above drawings include the following reference numerals:

[0039] 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

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0042] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0043] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0044] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0045] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface shape in the paraxial area can be based on the judgment method of the general knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface. In the present application, the left side is the object side and the right side is the image side.

[0046] In order to solve the problem that low aberration is required in a seven-element optical imaging lens in the prior art, which results in increased stray light at the tail end, the present invention provides an optical imaging lens.

[0047] like Figures 1 to 27 As 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 arranged in the lens barrel, the lens group is composed of seven lenses, and the seven lenses are, 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 in order; the at least one spacer includes a fifth spacer located between the fifth lens and the sixth lens and in contact with the image side portion of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and in contact with the image side portion of the sixth lens; the effective focal length f6 of the sixth lens, the center thickness CT6 of the sixth lens on the optical axis and the axial spacing EP56 between the fifth spacer and the sixth spacer satisfy: -122.21≤f6 / (EP56+CT6)≤-106.77; the inner diameter d6s of the object side of the sixth spacer, the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens satisfy: -3.74mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 .

[0048] The optical imaging lens of the present application is composed of a lens barrel, seven lenses arranged in the lens barrel, and at least one spacer. By reasonably arranging the positions of the seven lenses, the fifth spacer, and the sixth spacer, and setting the optical imaging lens to satisfy -122.21≤f6 / (EP56+CT6)≤-106.77, the contribution of the sixth lens to the system coma can be controlled, the coma generated by the front-end element can be effectively balanced, and good imaging quality can be obtained. At the same time, the axial spacing between the fifth lens and the sixth lens is controlled, the physical size and optical performance are balanced, and the ratio of the focal length of the sixth lens to the sum of the center thickness and the edge thickness of the sixth lens is constrained, which is conducive to controlling the focal length of the sixth lens not too long, and the center thickness and edge thickness of the sixth lens can be controlled within a smaller range, avoiding aberration problems caused by excessive focal length or excessive thickness. However, when the focal length of the sixth lens is controlled not to be too long and the center thickness and edge thickness are small, more ineffective light will enter the edge part of the sixth lens, which is likely to cause an increase in edge stray light of the tail lens and the tail spacer. Therefore, the present application constrains -3.74mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 , the light angle of the edge field of view can be within a reasonable range, which can effectively reduce the sensitivity of the system and effectively avoid the stray light generated by the sixth spacer, thereby achieving the purpose of improving the stray light and helping to improve the imaging quality of the optical imaging lens.

[0049] In addition, refer to Table 1 and Figure 22 to Figure 27 As shown, under the premise that the optical imaging lens satisfies f6 / (EP56+CT6)=-122.21, Fig. 22 and Fig.23 It is shown that the optical imaging lens satisfies d6s / (R12 / R11)=-2.23mm. -1 Light path diagram and stray light energy diagram when Fig.24 and Fig.25 The optical imaging lens satisfies d6s / (R12 / R11)=-3.9mm. -1 Light path diagram and stray light energy diagram when Fig.26 and Fig. 27 The optical imaging lens satisfies d6s / (R12 / R11)=-1.6mm. -1 Light path diagram and stray light energy diagram when

[0050] Depend on Figure 22 to Figure 27 It can be seen that when d6s / (R12 / R11)=-2.23mm -1 When the sixth spacer effectively intercepts the stray light, it does not affect the passage of the imaging light, and no new stray light is generated at the sixth spacer. The energy intensity of the stray light is 1.21e -6, the performance is better. When d6s / (R12 / R11)=-3.9mm -1 When the sixth spacer has additional stray light, the energy intensity of the stray light is 7.62e -6 , the performance is poor. When d6s / (R12 / R11)=-1.6mm -1 When the sixth spacer has an obvious additional stray light, the energy intensity of the stray light is 1.19e -5 , the performance is poor. It can be seen that when d6s / (R12 / R11) is at -3.74mm -1 To -1.73mm -1 The tail stray light suppression effect is best when the range is within 3.74mm. -1 ≤d6s / (R12 / R11)≤-1.73mm -1 , which can make the light angle of the edge field of view within a reasonable range, can effectively reduce the sensitivity of the system, and at the same time avoid the risk of new stray light generated by the sixth spacer, effectively reduce the tail stray light, and improve the imaging quality of the optical imaging lens.

[0051] Table 1

[0052] Conditional expression <![CDATA[d6s / (R12 / R11)=-2.23mm -1 ]]> <![CDATA[d6s / (R12 / R11)=-3.9mm -1 ]]> <![CDATA[d6s / (R12 / R11)=-1.6mm -1 ]]> Light path diagram Fig. 22 Fig.24 Fig.26 Stray light energy diagram Fig.23 Fig.25 Fig. 27

[0053] It should be noted that the at least one spacer also includes a first spacer located between the first lens and the second lens and in contact with the image side portion of the first lens, a second spacer located between the second lens and the third lens and in contact with the image side portion of the second lens, a third spacer located between the third lens and the fourth lens and in contact with the image side portion of the third lens, and a fourth spacer located between the fourth lens and the fifth lens and in contact with the image side portion of the fourth lens.

[0054] In this embodiment, the inner diameter d0m of the image side end surface of the lens barrel and the curvature radius R14 of the image side surface of the seventh lens satisfy: 7.90≤d0m / R14≤8.32. By reasonably setting the curvature radius of the image side surface of the seventh lens, the main ray angle CRA of the system can be adjusted, which helps to improve the edge field illumination. At the same time, by controlling the inner diameter of the image side end surface of the lens barrel, the invalid light reflected at the edge mechanism of the seventh lens can be effectively shielded, reducing the possibility of stray light generation, which is conducive to improving the assembly stability, and improving the imaging quality and reliability of the optical imaging lens.

[0055] In this embodiment, the outer diameter D6m of the image side surface of the sixth spacer, 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 satisfy: 1.36≤(D6m-d6m) / R13≤1.78. By controlling this conditional expression, the deformation problem of the sixth spacer after corrosion extinction can be effectively avoided, and the curvature radius of the seventh lens can be effectively controlled, ensuring that the air gap between the sixth lens and the front and rear lenses is within a certain range, and it is conducive to reducing the difficulty of molding the sixth lens.

[0056] In this embodiment, the air gap T67 between the sixth lens and the seventh lens on the optical axis and the maximum axial thickness CP6 of the sixth spacer satisfy: 14.41≤T67 / CP6≤19.00. The sixth spacer has a large optical sensitivity, and the field curvature can be adjusted by adjusting the maximum axial thickness of the sixth spacer, thereby improving the resolution of the optical imaging lens and the imaging quality.

[0057] In this embodiment, the effective focal length f5 of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, and the inner diameter d5s of the object side surface of the fifth spacer satisfy: -32.47≤f5 / R10×d5s≤-25.41. By controlling this conditional expression, the exit angle of the marginal field light at the fifth lens can be controlled, the sensitivity of the system can be reduced, the stray light can be reduced, and the imaging quality can be improved.

[0058] In this embodiment, the effective focal length f5 of the fifth lens, 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: -21.74≤f5 / R9×d4m≤-15.92. By reasonably controlling the effective focal length of the fifth lens and the curvature radius of the object side surface, the exit angle of the edge field light at the fifth lens can be controlled, which can effectively reduce the sensitivity of the system. Then, by constraining the inner diameter of the image side surface of the fourth spacer through the relationship, the fourth spacer can effectively block stray light other than the effective light, thereby improving the imaging quality.

[0059] In this embodiment, the effective focal length f5 of the fifth lens, the axial spacing EP45 between the fourth spacer and the fifth spacer, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 24.62≤f5 / (EP45+T56)≤40.05. Controlling the effective focal length of the fifth lens is beneficial to the optical imaging lens to better balance aberrations and improve the resolution of the system. In addition, by reasonably controlling this conditional expression, it is beneficial to reasonably control the axial thickness of the tail lens and the spacer, thereby ensuring the rationality of the size of the lens and the spacer, compressing the overall size while ensuring molding stability, and effectively reducing the overall field curvature sensitivity.

[0060] In this embodiment, the effective focal length f4 of the fourth lens, the air interval T45 between the fourth lens and the fifth lens on the optical axis, and the axial interval EP34 between the third spacer and the fourth spacer satisfy: -246.93≤f4 / (EP34+T45)≤-117.48. Controlling the effective focal length of the fourth lens is beneficial to better balance the aberrations of the optical imaging lens, and is also beneficial to improving the resolution of the system. Reasonable setting of the air interval between the fourth lens and the fifth lens can effectively reduce the overall field curvature sensitivity.

[0061] In this embodiment, the curvature radius R7 of the object side surface of the fourth lens and the inner diameter d3m of the image side surface of the third spacer satisfy: 23.83≤R7 / d3m≤43.38. By controlling the curvature radius of the object side surface of the fourth lens, the object side surface of the fourth lens can better receive effective light, avoid light leakage, and reduce the formation of ghost images. By constraining the inner diameter of the image side surface of the third spacer through a relationship, stray light other than effective light can be effectively blocked, thereby improving imaging quality.

[0062] In this embodiment, the curvature radius R8 of the image side surface of the fourth lens and the outer diameter D4s of the object side surface of the fourth spacer satisfy: 5.73≤R8 / D4s≤7.89. By constraining the curvature radius of the image side surface of the fourth lens and the outer diameter of the fourth spacer by the relationship, the stray light caused by light other than the effective light can be reduced, thereby improving the imaging quality. The curvature radius of the image side surface of the fourth lens is reasonably set to adjust the emission angle of the system light, which helps to improve the edge field illumination and enhance the imaging quality of the optical imaging lens.

[0063] In this embodiment, the curvature radius R5 of the object side surface of the third lens and the outer diameter D2m of the image side surface of the second spacer satisfy: -43.38≤R5 / D2m≤-23.31. Controlling the curvature radius of the object side surface of the third lens can adjust the refraction angle of the system light, and at the same time is conducive to restricting the size of the second spacer, thereby appropriately shielding stray light.

[0064] In this embodiment, the first lens has positive focal power, the object side surface of the first lens is convex, and the image side surface is concave; the sixth lens has negative focal power, the object side surface of the sixth lens is concave, and the image side surface is concave; the seventh lens has negative focal power, the object side surface of the seventh lens is convex, and the image side surface is concave. The first lens, the sixth lens, and the seventh lens are key lenses in the optical imaging lens of the present application. By constraining the focal power and surface shape of the three lenses, it is beneficial to control the incident angle of light, constrain the trend of light, ensure smooth transition of light, and at the same time, it is beneficial to correct aberrations, reduce distortion, and ensure imaging quality.

[0065] In this embodiment, the second lens has positive power, the object side surface of the second lens is convex, and the image side surface is concave; the third lens has negative power, the object side surface of the third lens is concave, and the image side surface is concave; the fourth lens has negative power, the object side surface of the fourth lens is convex, and the image side surface is concave; the fifth lens has positive power, the object side surface of the fifth lens is concave, and the image side surface is convex. By reasonably constraining the power and surface shape of the second lens, the third lens, the fourth lens, and the fifth lens, it is helpful to adjust the trend of the intermediate light, correct the aberration, and ensure the imaging quality.

[0066] Optionally, the optical imaging lens in the embodiments of the present application can be simulated by software and / or tools such as ZEMAX, CODEV, etc. In the process of simulation using the above software and / or tools, the surface profile of each lens can be simulated and appropriately adjusted according to the surface profile provided by the software and / or tool used.

[0067] In addition, in another optional embodiment of the present application, an optical imaging lens is also provided, including 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, 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 first lens has positive focal power, the second lens has positive focal power, the third lens has negative focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, and the seventh lens has negative focal power; the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the third lens is concave, and the image side surface is concave; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is concave, and the image side surface is concave. The side surface is convex; the object side surface of the sixth lens is concave, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave; at least one spacer includes a fifth spacer located between the fifth lens and the sixth lens and partially in contact with the image side surface of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and partially in contact with the image side surface of the sixth lens; the effective focal length f6 of the sixth lens, the center thickness CT6 of the sixth lens on the optical axis and the axial spacing EP56 between the fifth spacer and the sixth spacer satisfy: -122.21≤f6 / (EP56+CT6)≤-106.77; the effective focal length f5 of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, and the inner diameter d5s of the object side surface of the fifth spacer satisfy: -32.47≤f5 / R10×d5s≤-25.41.

[0068] The optical imaging lens of the present application is composed of a lens barrel, seven lenses arranged in the lens barrel, and at least one spacer. By reasonably arranging the optical power and surface shape of the seven lenses, the positions of the fifth spacer and the sixth spacer, and setting the optical imaging lens to meet -122.21≤f6 / (EP56+CT6)≤-106.77, it is possible to control the contribution of the sixth lens to the system coma, effectively balance the coma generated by the front-end elements, obtain good imaging quality, and at the same time control the axial spacing between the fifth lens and the sixth lens, balance the physical size and optical performance, and avoid aberration problems caused by excessive focal length or excessive thickness. However, in this case, it is easy to increase the edge stray light of the tail lens and the tail spacer. Therefore, by constraining -32.47≤f5 / R10×d5s≤-25.41, the present application can control the exit angle of the edge field light at the fifth lens, reduce the sensitivity of the system, reduce stray light, and improve imaging quality.

[0069] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0070] In addition, in another optional embodiment of the present application, an optical imaging lens is also provided, including 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, 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 first lens has positive focal power, the second lens has positive focal power, the third lens has negative focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, and the seventh lens has negative focal power; the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the third lens is concave, and the image side surface is concave; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is convex, and the image side surface is concave The side surface is concave, and the image side surface is convex; the object side surface of the sixth lens is concave, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave; at least one spacer includes a fifth spacer located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens; the air gap T67 on the optical axis between the sixth lens and the seventh lens, the air gap T45 on the optical axis between the fourth lens and the fifth lens, and the air gap T56 on the optical axis between the fifth lens and the sixth lens satisfy: 0.69≤T67 / (T45+T56)≤0.85; the effective focal length f6 of the sixth lens and the inner diameter d6s of the object side surface of the sixth spacer satisfy: -25.62≤f6 / d6s≤-23.28.

[0071] The optical imaging lens of the present application is composed of a lens barrel, seven lenses arranged in the lens barrel, and at least one spacer. By reasonably arranging the optical power and surface shape of the seven lenses, the positions of the fifth spacer and the sixth spacer, and setting the optical imaging lens to meet 0.69≤T67 / (T45+T56)≤0.85, the distribution of the fourth lens, the fifth lens, the sixth lens, and the seventh lens can be effectively adjusted, making the distribution of each lens more reasonable, and at the same time, it is beneficial to control the interval ratio between the sixth lens and the seventh lens, and to ensure the compactness of the rear-end structure. Further, by constraining -25.62≤f6 / d6s≤-23.28, it is beneficial to reduce the stray light generated by the edge structure of the sixth lens, thereby weakening the influence of stray light on the imaging quality and ensuring the imaging quality of the optical imaging lens.

[0072] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0073] The optical imaging lens in the present application may use multiple lenses, such as the seven lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0074] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although 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 may also include other numbers of lenses.

[0075] Figure 1 A schematic diagram of the dimensions of an optical imaging lens of the present application is shown. Figure 1 Parameters such as D4s, D2m, d6s, d5s, d3m, d4m, d6m, D6m, d0m, CP6, EP34, EP45, and EP56 are indicated in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the description of the optical imaging lens and the surface shape of the specific lens, these parameters will no longer be reflected in the drawings when the specific embodiments are described later.

[0076] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0077] It should be noted that in the following embodiment 1, there are two examples of embodiment 1-1 and embodiment 1-2, in embodiment 2, there are two examples of embodiment 2-1 and embodiment 2-2, in embodiment 3, there are two examples of embodiment 3-1 and embodiment 3-2, and in embodiment 4, there are two examples of embodiment 4-1 and embodiment 4-2. In the two examples of the same embodiment, the parameters such as the radius of curvature, center thickness, and the spacing distance between lenses and the coefficient of high-order terms of the optical imaging lens are the same, but the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel and the first to sixth spacers are different. In other words, the main structure for imaging is the same, but the auxiliary structure for imaging is different.

[0078] It should be noted that any one of the following embodiments 1 to 4 is applicable to all implementation methods of the present application.

[0079] Embodiment 1

[0080] like Figures 2 to 6 As shown, the optical imaging lens of the first embodiment is described. Figure 2 FIG. 1 is a schematic diagram showing the structure of the optical imaging lens of Example 1-1. Figure 3 A schematic structural diagram of the optical imaging lens of Embodiment 1-2 is shown.

[0081] like Figure 2 and Figure 3 As 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 in sequence from the object side to the image side in the lens barrel P0.

[0082] like Figure 2 , which is a schematic diagram of the structure of the optical imaging lens of Example 1-1. In this example, the object side surface and the image side surface of the first spacer P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and the image side surface of the second spacer P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and the image side surface of the third spacer P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The object side surface and the image side surface of the fourth spacer P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. The object side surface and the image side surface of the fifth spacer P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens. The object side surface and the image side surface of the sixth spacer P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens.

[0083] like Figure 3 , which is a schematic diagram of the structure of the optical imaging lens of Example 1-2. In this example, a fourth auxiliary spacer is also provided on the image side of the fourth spacer P4. At this time, the image side surface of the fourth spacer P4 partially abuts against the object side surface of the fourth auxiliary spacer, and the image side surface of the fourth auxiliary spacer partially abuts against the object side surface S9 of the fifth lens. The abutment method of the remaining spacers is the same as that of Example 1-1, and the relevant description in Example 1-1 may be referred to, and no further description is given here.

[0084] In summary, the structural parameters of the optical imaging lens of Example 1 in Example 1-1 and Example 1-2 are shown in Table 2.

[0085] Table 2

[0086] Parameters / Examples 1-1 1-2 D2m(mm) 5.670 5.197 d3m(mm) 2.348 2.348 d4m(mm) 2.847 2.786 D4s(mm) 5.870 5.397 d5s(mm) 3.650 3.650 d6s(mm) 5.376 5.376 d6m(mm) 5.376 5.376 D6m(mm) 8.216 8.216 d0m(mm) 10.244 10.244 CP6(mm) 0.022 0.022 EP34(mm) 0.402 0.355 EP45(mm) 0.667 0.467 EP56(mm) 0.600 0.600

[0087] In Embodiment 1, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a concave surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a concave surface. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface.

[0088] In Example 1, the effective focal length f1 of the first lens is 6.26 mm, the effective focal length f2 of the second lens is 7.34 mm, the effective focal length f3 of the third lens is -8.12 mm, the effective focal length f4 of the fourth lens is -97.24 mm, the effective focal length f5 of the fifth lens is 20.76 mm, the effective focal length f6 of the sixth lens is -125.13 mm, and the effective focal length f7 of the seventh lens is -22.45 mm.

[0089] Table 3 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0090] Table 3

[0091]

[0092]

[0093] In the first embodiment, the object side surface and the image side surface of the first lens E1 to the seventh lens E7 are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0094]

[0095] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R, that is, the paraxial curvature c is the reciprocal of the curvature radius R in the above Table 1; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 4 gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspheric mirror surface S1-S14 in Example 1.

[0096] Table 4

[0097]

[0098]

[0099] Figure 4 The axial chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the imaging lens. Figure 5 The astigmatism curve of the optical imaging lens of the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6 The magnification chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0100] according to Figures 4 to 6 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0101] Embodiment 2

[0102] like Figures 7 to 11 As shown, the optical imaging lens of the second embodiment is described. Figure 7 A schematic diagram of the structure of the optical imaging lens of Example 2-1 is shown. Figure 8 A schematic structural diagram of the optical imaging lens of Example 2-2 is shown.

[0103] like Figure 7 and Figure 8As 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 in sequence from the object side to the image side in the lens barrel P0.

[0104] like Figure 7 As shown, it is a schematic diagram of the structure of the optical imaging lens of Example 2-1. In this example, the object side surface and image side surface of the first spacer P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and image side surface of the second spacer P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and image side surface of the third spacer P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The object side surface and image side surface of the fourth spacer P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. The object side surface and image side surface of the fifth spacer P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens. The object side surface and image side surface of the sixth spacer P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens.

[0105] like Figure 8 , which is a schematic diagram of the structure of the optical imaging lens of Example 2-2. In this example, a fourth auxiliary spacer is also provided on the image side of the fourth spacer P4. At this time, the image side surface of the fourth spacer P4 partially abuts against the object side surface of the fourth auxiliary spacer, and the image side surface of the fourth auxiliary spacer partially abuts against the object side surface S9 of the fifth lens. The abutment method of the remaining spacers is the same as that of Example 2-1, and the relevant description in Example 2-1 may be referred to, and no further description is given here.

[0106] In summary, the structural parameters of the optical imaging lens of Example 2 in Example 2-1 and Example 2-2 are shown in Table 5.

[0107] Table 5

[0108] Parameters / Examples 2-1 2-2 D2m(mm) 5.670 5.670 d3m(mm) 2.309 2.309 d4m(mm) 2.855 2.709 D4s(mm) 5.870 5.870 d5s(mm) 3.644 3.644 d6s(mm) 5.517 5.517 d6m(mm) 5.517 5.517 D6m(mm) 7.825 7.825 d0m(mm) 10.244 10.244 CP6(mm) 0.022 0.022 EP34(mm) 0.437 0.322 EP45(mm) 0.670 0.445 EP56(mm) 0.639 0.639

[0109] In the second embodiment, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a concave surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a concave surface. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface.

[0110] In Example 2, the effective focal length f1 of the first lens is 6.07 mm, the effective focal length f2 of the second lens is 7.17 mm, the effective focal length f3 of the third lens is -7.89 mm, the effective focal length f4 of the fourth lens is -155.29 mm, the effective focal length f5 of the fifth lens is 23.84 mm, the effective focal length f6 of the sixth lens is -130.91 mm, and the effective focal length f7 of the seventh lens is -16.41 mm.

[0111] Table 6 shows a basic structural parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0112] Table 6

[0113]

[0114]

[0115] Table 7 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspheric mirror surfaces S1-S14 in Example 2.

[0116] Table 7

[0117] Face number A4 A6 A8 A10 A12 A14 A16 S1 8.0695E-03 1.5388E-03 4.9503E-05 -8.5115E-05 -5.2813E-05 -1.8420E-05 -7.2638E-06 S2 2.1745E-03 7.7491E-03 -6.6803E-04 -3.0966E-04 -1.5179E-04 -4.7221E-05 -4.6519E-06 S3 -2.3471E-02 1.1916E-02 1.0889E-04 -1.4839E-04 -1.3705E-04 -5.9229E-05 -7.4137E-06 S4 -2.7345E-02 8.9679E-03 -1.2255E-03 -4.4206E-05 -5.0406E-04 -1.0092E-04 1.4971E-05 S5 2.1298E-02 -9.5760E-04 -1.3781E-03 -1.5898E-04 -5.3202E-04 -4.9896E-05 1.7621E-05 S6 6.8325E-02 9.6433E-04 1.5568E-03 2.3497E-04 -1.3636E-04 1.3321E-05 7.6971E-06 S7 -2.2604E-01 -5.6451E-03 5.6243E-03 2.3910E-03 -7.6077E-05 -2.3596E-04 -9.4066E-05 S8 -3.3242E-01 1.8593E-02 1.1462E-02 1.2413E-03 -1.3361E-03 -1.6788E-04 -3.0711E-05 S9 -1.8087E-01 9.7992E-02 -1.5521E-02 -5.2144E-03 4.7651E-04 1.4529E-03 -8.4315E-04 S10 -1.7775E-01 1.3288E-01 -1.5048E-02 -7.5817E-03 2.8415E-03 1.1058E-03 -1.8682E-03 S11 -2.3117E-01 -1.2978E-01 4.1947E-02 -1.7321E-02 9.3779E-03 2.7900E-03 -1.6833E-03 S12 -3.8207E-01 -1.1608E-02 3.9717E-02 -4.2848E-02 1.6806E-02 -5.6202E-03 -4.8201E-03 S13 -2.8151E+00 7.7314E-01 -1.8335E-01 2.3806E-02 -6.4600E-03 9.3617E-03 -9.3520E-03 S14 -5.4375E+00 1.1995E+00 -3.8572E-01 1.3926E-01 -5.0642E-02 2.6134E-02 -1.1282E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.3678E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -3.6437E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.4053E-06 1.7078E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.1485E-05 8.4651E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 4.5734E-05 -1.3162E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 3.6374E-05 4.1395E-05 2.6832E-05 -2.6128E-05 7.8938E-06 2.1927E-06 1.2324E-06 S10 7.4252E-04 -1.9317E-04 1.2298E-04 -8.9806E-05 4.3621E-05 2.3505E-06 -3.2191E-06 S11 1.0064E-03 -7.5088E-04 1.1545E-04 -2.7444E-04 5.7378E-05 -5.5821E-05 1.9677E-05 S12 4.9036E-03 -3.4151E-03 1.8517E-03 -5.2864E-04 3.5034E-04 -2.3565E-04 9.5693E-05 S13 3.9875E-03 -4.5202E-04 8.1084E-05 3.8204E-04 6.0862E-05 -2.5113E-04 4.4377E-05 S14 6.6984E-03 -3.1764E-03 1.4330E-03 -5.7108E-04 1.5118E-04 -1.2176E-04 5.5940E-06

[0118] Fig. 9 The axial chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens. Fig.10 The astigmatism curve of the optical imaging lens of the second embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.11 The magnification chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0119] according to Figures 9 to 11It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0120] Embodiment 3

[0121] like Figures 12 to 16 As shown, the optical imaging lens of embodiment 3 is described. Fig.12 FIG. 3 is a schematic diagram showing the structure of the optical imaging lens of Example 3-1. Fig.13 A schematic structural diagram of the optical imaging lens of Example 3-2 is shown.

[0122] like Fig.12 and Fig.13 As 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 in sequence from the object side to the image side in the lens barrel P0.

[0123] like Fig.12 As shown, it is a schematic diagram of the structure of the optical imaging lens of Example 3-1. In this example, the object side surface and the image side surface of the first spacer P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and the image side surface of the second spacer P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and the image side surface of the third spacer P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The object side surface and the image side surface of the fourth spacer P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. The object side surface and the image side surface of the fifth spacer P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens. The object side surface and the image side surface of the sixth spacer P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens.

[0124] like Fig.13 FIG. 3 is a schematic diagram of the structure of the optical imaging lens of Example 3-2. In this example, the supporting and abutting manner of each residual spacer is the same as that of Example 3-1, and the relevant description in Example 3-1 may be referred to, and will not be repeated here.

[0125] In summary, the structural parameters of the optical imaging lens of Example 3 in Example 3-1 and Example 3-2 are shown in Table 8.

[0126] Table 8

[0127]

[0128]

[0129] In Embodiment 3, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a concave surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a concave surface. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface.

[0130] In Example 3, the effective focal length f1 of the first lens is 6.09 mm, the effective focal length f2 of the second lens is 7.16 mm, the effective focal length f3 of the third lens is -8.02 mm, the effective focal length f4 of the fourth lens is -80.65 mm, the effective focal length f5 of the fifth lens is 27.57 mm, the effective focal length f6 of the sixth lens is -139.77 mm, and the effective focal length f7 of the seventh lens is -23.27 mm.

[0131] Table 9 shows a basic structural parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both millimeters.

[0132] Table 9

[0133]

[0134] Table 10 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspheric mirror surfaces S1-S14 in Example 3.

[0135] Table 10

[0136]

[0137]

[0138] Fig.14 The axial chromatic aberration curve of the optical imaging lens of the third embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens. Fig.15 The astigmatism curve of the optical imaging lens of the third embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.16 The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0139] according to Figures 14 to 16 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0140] Embodiment 4

[0141] like Figures 17 to 21 As shown, the optical imaging lens of Example 4 is described. Fig.17 FIG. 4 is a schematic diagram showing the structure of the optical imaging lens of Example 4-1. Fig.18 A schematic structural diagram of the optical imaging lens of Example 4-2 is shown.

[0142] like Fig.17 and Fig.18 As 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 in sequence from the object side to the image side in the lens barrel P0.

[0143] like Fig.17 As shown, it is a schematic diagram of the structure of the optical imaging lens of Example 4-1. In this example, the object side surface and image side surface of the first spacer P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and image side surface of the second spacer P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and image side surface of the third spacer P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The object side surface and image side surface of the fourth spacer P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. The object side surface and image side surface of the fifth spacer P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens. The object side surface and image side surface of the sixth spacer P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens.

[0144] like Fig.18 FIG. 4 is a schematic diagram of the structure of the optical imaging lens of Example 4-2. In this example, the supporting and abutting manner of each residual spacer is the same as that of Example 4-1, and the relevant description in Example 4-1 may be referred to, and will not be repeated here.

[0145] In summary, the structural parameters of the optical imaging lens of Example 4 in Example 4-1 and Example 4-2 are shown in Table 11.

[0146] Table 11

[0147] Parameters / Examples 4-1 4-2 D2m(mm) 5.670 5.055 d3m(mm) 2.294 2.294 d4m(mm) 2.802 2.802 D4s(mm) 5.870 5.255 d5s(mm) 3.661 3.661 d6s(mm) 5.456 5.456 d6m(mm) 5.456 5.456 D6m(mm) 7.891 8.149 d0m(mm) 10.244 10.244 CP6(mm) 0.022 0.022 EP34(mm) 0.402 0.402 EP45(mm) 0.706 0.706 EP56(mm) 0.625 0.625

[0148] In Embodiment 4, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a concave surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a concave surface. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface.

[0149] In Example 4, the effective focal length f1 of the first lens is 6.20 mm, the effective focal length f2 of the second lens is 7.28 mm, the effective focal length f3 of the third lens is -8.08 mm, the effective focal length f4 of the fourth lens is -164.96 mm, the effective focal length f5 of the fifth lens is 26.21 mm, the effective focal length f6 of the sixth lens is -137.71 mm, and the effective focal length f7 of the seventh lens is -23.20 mm.

[0150] Table 12 shows a basic structural parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0151] Table 12

[0152]

[0153] Table 13 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspheric mirror surfaces S1-S14 in Example 4.

[0154] Table 13

[0155]

[0156]

[0157] Fig.19 The axial chromatic aberration curve of the optical imaging lens of the fourth embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the imaging lens. Fig. 20 The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.21 The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0158] according to Figures 19 to 21It can be seen that the optical imaging lens provided in the fourth embodiment can achieve good imaging quality.

[0159] In summary, Embodiments 1 to 4 respectively satisfy the relationships shown in Table 14.

[0160] Table 14

[0161] Conditional / Example 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 d0m / R14 8.32 8.32 8.10 8.10 7.90 7.90 8.29 8.29 (D6m-d6m) / R13 1.78 1.78 1.36 1.36 1.45 1.45 1.52 1.69 f6 / (EP56+CT6) -116.70 -116.70 -106.77 -106.77 -120.46 -120.46 -122.21 -122.21 d6s / (R12 / R11) -2.77 -2.77 -3.74 -3.74 -1.73 -1.73 -2.23 -2.23 T67 / CP6 19.00 19.00 14.41 14.41 14.89 14.89 18.11 18.11 f5 / R10×d5s -25.41 -25.41 -28.18 -28.18 -32.47 -32.47 -31.79 -31.79 f5 / R9×d4m -16.27 -15.92 -18.67 -17.72 -21.74 -21.74 -21.18 -21.18 f5 / (EP45+T56) 24.62 32.28 29.07 40.05 31.60 31.60 29.95 29.95 f4 / (EP34+T45) -135.19 -144.64 -208.75 -246.93 -117.48 -117.48 -231.20 -231.20 R7 / d3m 29.90 29.90 23.83 23.83 43.38 43.38 29.10 29.10 R8 / D4s 5.73 6.24 6.11 6.11 5.94 6.64 7.07 7.89 R5 / D2m -32.91 -35.91 -23.31 -23.31 -31.71 -35.57 -38.67 -43.38 T67 / (T45+T56) 0.85 0.85 0.69 0.69 0.70 0.70 0.83 0.83 f6 / d6s -23.28 -23.28 -23.73 -23.73 -25.62 -25.62 -25.24 -25.24

[0162] Table 15 shows the effective focal lengths of the lenses of the optical imaging lenses of Examples 1 to 4.

[0163] Table 15

[0164]

[0165]

[0166] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0167] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0168] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0169] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0170] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: comprising a lens barrel, a lens group and at least one spacer disposed in the lens barrel, The lens group is composed of seven lenses, and the seven lenses are, 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 includes a fifth spacer located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens; The effective focal length f6 of the sixth lens, the center thickness CT6 of the sixth lens on the optical axis, and the axial interval EP56 between the fifth spacer and the sixth spacer satisfy the following: -122.21≤f6 / (EP56+CT6)≤-106.77; The inner diameter d6s of the object side surface of the sixth spacer, 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 satisfy: -3.74 mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 .

2. The optical imaging lens according to claim 1, wherein: The inner diameter d0m of the image side end surface of the lens barrel and the curvature radius R14 of the image side surface of the seventh lens satisfy the following relationship: 7.90≤d0m / R14≤8.

32.

3. The optical imaging lens according to claim 1, wherein: An outer diameter D6m of the image side surface of the sixth spacer, 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 the following relationship: 1.36≤(D6m-d6m) / R13≤1.

78.

4. The optical imaging lens according to claim 1, wherein: An air interval T67 between the sixth lens and the seventh lens on the optical axis and a maximum axial thickness CP6 of the sixth spacer satisfy the following ratio: 14.41≤T67 / CP6≤19.

00.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens, the curvature radius R10 of the image-side surface of the fifth lens, and the inner diameter d5s of the object-side surface of the fifth spacer satisfy the following: -32.47≤f5 / R10×d5s≤-25.

41.

6. The optical imaging lens according to claim 1, wherein: The at least one spacer further includes a fourth spacer located between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens, The effective focal length f5 of the fifth lens, 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: -21.74≤f5 / R9×d4m≤-15.

92.

7. The optical imaging lens according to claim 1, wherein: The at least one spacer further includes a fourth spacer located between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens, The effective focal length f5 of the fifth lens, the axial interval EP45 between the fourth spacer and the fifth spacer, and the air interval T56 between the fifth lens and the sixth lens on the optical axis satisfy: 24.62≤f5 / (EP45+T56)≤40.

05.

8. The optical imaging lens according to claim 1, wherein: The at least one spacer further includes a third spacer located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, and a fourth spacer located between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens. The effective focal length f4 of the fourth lens, the air interval T45 between the fourth lens and the fifth lens on the optical axis, and the axial interval EP34 between the third spacer and the fourth spacer satisfy: -246.93≤f4 / (EP34+T45)≤-117.

48.

9. The optical imaging lens according to claim 1, wherein: The at least one spacer further includes a third spacer located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, A curvature radius R7 of the object-side surface of the fourth lens and an inner diameter d3m of the image-side surface of the third spacer satisfy the following: 23.83≤R7 / d3m≤43.

38.

10. The optical imaging lens according to claim 1, wherein: The at least one spacer further includes a fourth spacer located between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens, A curvature radius R8 of the image-side surface of the fourth lens and an outer diameter D4s of the object-side surface of the fourth spacer satisfy the following: 5.73≤R8 / D4s≤7.

89.

11. The optical imaging lens according to claim 1, wherein: The at least one spacer further includes a second spacer located between the second lens and the third lens and in contact with the image side surface portion of the second lens, A curvature radius R5 of the object-side surface of the third lens and an outer diameter D2m of the image-side surface of the second spacer satisfy the following: -43.38≤R5 / D2m≤-23.

31.

12. The optical imaging lens according to any one of claims 1 to 11, characterized in that: The first lens has positive optical power, the object side surface of the first lens is convex, and the image side surface is concave; the sixth lens has negative optical power, the object side surface of the sixth lens is concave, and the image side surface is concave; the seventh lens has negative optical power, the object side surface of the seventh lens is convex, and the image side surface is concave.

13. The optical imaging lens according to any one of claims 1 to 11, characterized in that: The second lens has positive focal power, the object side surface of the second lens is convex, and the image side surface is concave; the third lens has negative focal power, the object side surface of the third lens is concave, and the image side surface is concave; the fourth lens has negative focal power, the object side surface of the fourth lens is convex, and the image side surface is concave; the fifth lens has positive focal power, the object side surface of the fifth lens is concave, and the image side surface is convex.

Images