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, 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 >. The seven-piece optical imaging lens solves 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.

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. In order to match these devices, optical imaging lenses are developing towards small size under the premise of ensuring imaging quality, which makes the design process more complex. Currently, seven-piece optical imaging lenses usually optimize the optical parameters or sizes of the tail end lenses to meet the demand for high imaging quality, thereby improving the aberration problem, but this easily leads to an increase in tail end stray light, affecting the imaging quality.

[0003] That is, the seven-piece optical imaging lens in the prior art has the problem of meeting low aberration leading to an increase in tail end stray light. SUMMARY

[0004] The main purpose of the utility model is to provide an optical imaging lens to solve the problem of the seven-piece optical imaging lens in the prior art meeting low aberration leading to an increase in tail end stray light.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, an optical imaging lens is provided, which includes a lens barrel, a lens group and at least one spacer arranged in the lens barrel, the lens group is composed of seven lenses, 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 includes 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 central thickness CT6 of the sixth lens on the optical axis and the axial interval 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 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: -3.74mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 .

[0006] 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 object side surface of third lens is concave, and the image side surface 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 fifth spacer between fifth lens and sixth lens and with the image side surface portion of fifth lens contact, the sixth spacer between sixth lens and seventh lens and with the image side surface portion of sixth lens contact;The effective focal length f6 of sixth lens, the central thickness CT6 of sixth lens on optical axis and the axial interval EP56 between fifth spacer and sixth spacer satisfy:-122.21≤f6 / (EP56+CT6)≤-106.77;The effective focal length f5 of fifth lens, the curvature radius R10 of the image side surface of fifth lens, the inner diameter d5s of the object side surface of fifth spacer satisfy:-32.47≤f5 / R10×d5s≤-25.41.

[0007] 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 object side surface of third lens is concave, and the image side surface 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 fifth spacer between fifth lens and sixth lens and with the image side surface portion contact of fifth lens, the sixth spacer between sixth lens and seventh lens and with the image side surface portion contact of sixth lens;Air interval T67 of sixth lens and seventh lens on optical axis, air interval T45 between fourth lens and fifth lens on optical axis and air interval T56 between fifth lens and sixth lens satisfy: 0.69≤T67 / (T45+T56)≤0.85;The effective focal length f6 of sixth lens and the inner diameter d6s of the object side surface of sixth spacer satisfy: -25.62≤f6 / d6s≤-23.28.

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

[0009] Further, 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 radius of curvature R13 of the object side surface of the seventh lens satisfy: 1.36≤(D6m-d6m) / R13≤1.78.

[0010] Further, the air interval T67 of 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.

[0011] Further, the effective focal length f5 of the fifth lens, the radius of curvature 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] Further, the at least one spacer further comprises a fourth spacer located between the fourth lens and the fifth lens and in contact with a part of the image side surface of the fourth lens, and a radius of curvature R9 of the object side surface of the fifth lens and an inner diameter d4m of the image side surface of the fourth spacer satisfy: -21.74≤f5 / R9×d4m≤-15.92.

[0013] Further, the at least one spacer further comprises a fourth spacer located between the fourth lens and the fifth lens and in contact with a part of the image side surface of the fourth lens, and an axial interval EP45 between the fourth spacer and the fifth spacer and an air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy: 24.62≤f5 / (EP45+T56)≤40.05.

[0014] Further, the at least one spacer further comprises a third spacer located between the third lens and the fourth lens and in contact with a part of the image side surface of the third lens, and a fourth spacer located between the fourth lens and the fifth lens and in contact with a part of the image side surface of the fourth lens, and a radius of curvature R4 of the object side surface of the fourth lens and an axial interval EP34 between the third spacer and the fourth spacer satisfy: -246.93≤f4 / (EP34+T45)≤-117.48.

[0015] Further, the at least one spacer further comprises a third spacer located between the third lens and the fourth lens and in contact with a part of the image side surface of the third lens, and a radius of curvature 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: 23.83≤R7 / d3m≤43.38.

[0016] Further, the at least one spacer further comprises a fourth spacer located between the fourth lens and the fifth lens and in contact with a part of the image side surface of the fourth lens, and a radius of curvature 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: 5.73≤R8 / D4s≤7.89.

[0017] Further, the at least one spacer further comprises a second spacer located between the second lens and the third lens and in contact with a part of the image side surface of the second lens, and a radius of curvature 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: -43.38≤R5 / D2m≤-23.31.

[0018] 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 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.

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

[0020] By applying the technical scheme of the utility model, the optical imaging lens of the application is composed of a lens barrel and seven lenses and at least one spacer arranged in the lens barrel, the positions of the seven lenses, the fifth spacer and the sixth spacer are arranged reasonably, and the optical imaging lens is arranged to satisfy -122.21≤f6 / (EP56+CT6)≤-106.77, the contribution of the sixth lens to the coma of the system can be controlled, the coma generated by the front end element can be effectively balanced, good imaging quality can be obtained, the axial interval between the fifth lens and the sixth lens is controlled, the physical size and the optical performance are balanced, the ratio of the focal length of the sixth lens to the sum of the central thickness and the edge thickness of the sixth lens is constrained, the focal length of the sixth lens can be controlled not to be too long, the central thickness and the edge thickness of the sixth lens can be controlled in a small range, and the aberration problem caused by the too long focal length or the too large thickness can be avoided. However, in the case that the focal length of the sixth lens is not too long and the central thickness and the edge thickness are small, more non-effective light rays will enter the edge part of the sixth lens, which is easy to cause the increase of the edge stray light of the tail end lens and the tail end spacer. Therefore, by constraining -3.74mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 , the light ray angle of the edge field of view can be in a reasonable range, the sensitivity of the system can be effectively reduced, the stray light generated by the sixth spacer can be effectively avoided, the purpose of improving the stray light is achieved, and the imaging quality of the optical imaging lens is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of the application form a part of the application and serve to further provide a further understanding of the application, the illustrative embodiments of the application and the explanations thereof serve to explain the application and do not constitute an improper limitation of the application. In the drawings:

[0022] Figure 1 A size marking diagram of the optical imaging lens of one optional embodiment of the application is shown;

[0023] Figure 2 A structure schematic view of the optical imaging lens of the embodiment 1-1 of the application is shown;

[0024] Figure 3A structural schematic view of the optical imaging lens of the embodiment 1-2 of the utility model is shown;

[0025] Figures 4 to 6 The on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens of the embodiment one of the utility model are respectively shown;

[0026] Figure 7 A structural schematic view of the optical imaging lens of the embodiment 2-1 of the utility model is shown;

[0027] Figure 8 A structural schematic view of the optical imaging lens of the embodiment 2-2 of the utility model is shown;

[0028] Figures 9 to 11 The 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;

[0029] Figure 12 A structural schematic view of the optical imaging lens of the embodiment 3-1 of the utility model is shown;

[0030] Figure 13 A structural schematic view of the optical imaging lens of the embodiment 3-2 of the utility model is shown;

[0031] 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;

[0032] Figure 17 A structural schematic view of the optical imaging lens of the embodiment 4-1 of the utility model is shown;

[0033] Figure 18 A structural schematic view of the optical imaging lens of the embodiment 4-2 of the utility model is shown;

[0034] 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;

[0035] Figure 22 And Figure 23 The optical path diagram and the stray light energy diagram of an optional example of the optical imaging lens are respectively shown when f6 / (EP56+CT6)=-122.21 and d6s / (R12 / R11)=-2.23mm -1 ;

[0036] Figure 24 And Figure 25The optical imaging lens of one optional example satisfies f6 / (EP56+CT6)=-122.21 and d6s / (R12 / R11)=-3.9mm -1 The optical path diagram and the stray light energy diagram when

[0037] Figure 26 And Figure 27 The optical imaging lens of one optional example satisfies f6 / (EP56+CT6)=-122.21 and d6s / (R12 / R11)=-1.6mm -1 The optical path diagram and the stray light energy diagram when

[0038] Among them, the above drawings include the following reference signs:

[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 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.

[0041] 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.

[0042] 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, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

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

[0044] In the accompanying 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 illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0045] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to the judgment method commonly known in the art, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For 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; for 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.

[0046] To address the problem of increased stray light at the tail end caused by insufficient low aberration in existing seven-element optical imaging lenses, this invention provides an optical imaging lens.

[0047] like Figures 1 to 27 As shown, in an optional embodiment of this 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 consists of seven lenses, which 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 at least one spacer includes a fifth spacer located between the fifth and sixth lenses and in contact with the image-side surface of the fifth lens, and a sixth spacer located between the sixth and seventh lenses 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 and sixth spacers satisfy the following: -122.21≤f6 / (EP56+CT6)≤-106.77. The inner diameter d6s of the object-side surface of the sixth spacer, the radius of curvature R11 of the object-side surface of the sixth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy the following: -3.74mm. -1≤d6s / (R12 / R11)≤-1.73mm -1 .

[0048] The optical imaging lens of the present application is composed of a lens barrel and seven lenses, at least one spacer arranged in the lens barrel. By reasonably arranging the positions of the seven lenses, the fifth spacer and the sixth spacer, and by setting the optical imaging lens to satisfy -122.21≤f6 / (EP56+CT6)≤-106.77, the contribution of the sixth lens to the coma of the system can be controlled, the coma generated by the front-end elements 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 the optical performance are balanced, 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 to be too long, and the center thickness and the edge thickness of the sixth lens can be controlled in a smaller range, avoiding the problem of aberration caused by too long focal length or too large thickness. However, in the case of controlling the focal length of the sixth lens not to be too long and the center thickness and the edge thickness of the sixth lens being small, more non-effective light rays will enter the edge part of the sixth lens, which is easy to cause the increase of the edge stray light of the tail-end lens and the tail-end spacer. Therefore, by constraining -3.74mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 , the angle of light rays in the edge field of view can be within a reasonable range, the sensitivity of the system can be effectively reduced, the stray light generated by the sixth spacer can be effectively avoided, the purpose of improving the stray light is achieved, and the imaging quality of the optical imaging lens is improved.

[0049] In addition, as shown in Table 1 and Figures 22 to 27 below, under the premise that the optical imaging lens satisfies f6 / (EP56+CT6)=-122.21, Figure 22 and Figure 23 respectively show the optical path diagram and the stray light energy diagram when the optical imaging lens satisfies d6s / (R12 / R11)=-2.23mm -1 . Figure 24 and Figure 25 respectively show the optical path diagram and the stray light energy diagram when the optical imaging lens satisfies d6s / (R12 / R11)=-3.9mm -1 . Figure 26 and Figure 27 respectively show the optical path diagram and the stray light energy diagram when the optical imaging lens satisfies d6s / (R12 / R11)=-1.6mm -1 .

[0050] As can be seen from Figures 22 to 27 , when d6s / (R12 / R11)=-2.23mm -1When d6s / (R12 / R11)=-3.9mm, the sixth spacer effectively intercepts stray light, while not affecting the passing of imaging light, and no new stray light is generated at the sixth spacer. The energy intensity of the stray light is 1.21e -6 , and the performance is better. When d6s / (R12 / R11)=-1.6mm -1 , there is new stray light at the sixth spacer, the energy intensity of the stray light is 7.62e -6 , and the performance is poor. When d6s / (R12 / R11)=-1.6mm -1 , there is obvious new stray light at the sixth spacer, the energy intensity of the stray light is 1.19e -5 , and the performance is poor. Therefore, when d6s / (R12 / R11) is in the range of-3.74mm -1 to-1.73mm -1 , the tail end stray light suppression effect is best. Therefore, by constraining 3.74mm -1 ≤d6s / (R12 / R11)≤-1.73mm -1 , the angle of the light at the edge field can be within a reasonable range, the sensitivity of the system can be effectively reduced, the risk of new stray light generated by the sixth spacer can be avoided, the tail end stray light can be effectively reduced, and the imaging quality of the optical imaging lens is improved.

[0051] Table 1

[0052]

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

[0054] In the 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 chief 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 in the edge mechanism of the seventh lens can be effectively shielded, the possibility of stray light generation is reduced, the assembly stability is improved, and the imaging quality and reliability quality of the optical imaging lens are improved.

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

[0056] In the embodiment, the air gap T67 of 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 optical sensitivity of the sixth spacer is larger, and by adjusting the maximum axial thickness of the sixth spacer, the size of the field curvature can be adjusted, the resolution of the optical imaging lens is improved, and the imaging quality is improved.

[0057] In the embodiment, the effective focal length f5 of the fifth lens, the radius of curvature 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 the conditional expression, the exit angle of the marginal field light in the fifth lens can be controlled, the sensitivity of the system is reduced, the stray light is reduced, and the imaging quality is improved.

[0058] In the embodiment, the effective focal length f5 of the fifth lens, the radius of curvature 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 and the radius of curvature of the object side surface of the fifth lens, the exit angle of the marginal field light in the fifth lens can be controlled, the sensitivity of the system can be effectively reduced, and the inner diameter of the image side surface of the fourth spacer is constrained by the relationship, so that the fourth spacer can effectively block stray light other than effective light, and the imaging quality is improved.

[0059] In the embodiment, the effective focal length f5 of the fifth lens, the axial interval EP45 between the fourth spacer and the fifth spacer, and the air gap T56 of 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 conducive to better balancing aberrations of the optical imaging lens, and is conducive to improving the resolution of the system. In addition, by reasonably controlling the conditional expression, the axial thickness of the tail end lens and the spacer can be reasonably controlled, so that the size of the lens and the spacer is reasonable, the molding stability is ensured, the overall size is compressed, and the overall field curvature sensitivity is effectively reduced.

[0060] In the embodiment, the effective focal length f4 of the fourth lens, the air gap T45 of the fourth lens and the fifth lens on the optical axis, 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 conducive to better balancing aberration of the optical imaging lens, and is conducive to improving the resolution of the system. Reasonably setting the air gap of the fourth lens and the fifth lens can effectively reduce the overall field curvature sensitivity.

[0061] In the 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 ghost image formation. By constraining the inner diameter of the image side surface of the third spacer through the relationship, the stray light other than the effective light can be effectively blocked, and the imaging quality is improved.

[0062] In the 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 through the relationship, the stray light caused by the light other than the effective light can be reduced, thereby improving the imaging quality. Reasonably setting the curvature radius of the image side surface of the fourth lens can adjust the exit angle of the system light, which is helpful to improve the edge field illumination and improve the imaging quality of the optical imaging lens.

[0063] In the 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 is conducive to constraining the size of the second spacer, thereby appropriately blocking stray light.

[0064] In the embodiment, the first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface is concave; the sixth lens has negative refractive power, the object side surface of the sixth lens is concave, and the image side surface is concave; the seventh lens has negative refractive 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 application. By constraining the refractive power and surface shape of the three lenses, the light incidence angle is controlled, the light path is constrained, the smooth transition of light is ensured, and the aberration is corrected, the distortion is reduced, and the imaging quality is ensured.

[0065] In the embodiment, 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 third lens has negative refractive power, the object side surface of the third lens is concave, 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. By reasonably constraining the refractive power and surface shape of the second lens, the third lens, the fourth lens and the fifth lens, the middle light ray trend can be adjusted, the aberration can be corrected, and the imaging quality can be ensured.

[0066] 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 using 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 the tool used, and appropriate adjustment can be made.

[0067] In addition, in another optional embodiment of the present application, an optical imaging lens is also provided, which comprises 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 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; the object side surface of the sixth lens is concave, and the image side surface is concave; and the object side surface of the seventh lens is convex, and the image side surface is concave; the at least one spacer comprises 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 central thickness CT6 of the sixth lens on the optical axis, and the axial interval 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 radius of curvature 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 and seven lenses and at least one spacer arranged in the lens barrel. By reasonably arranging the refractive power and surface shape of the seven lenses, the positions of the fifth and sixth spacers, 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 elements can be effectively balanced, and good imaging quality can be obtained. At the same time, the axial spacing between the fifth and sixth lenses is controlled to balance the physical size and optical performance, and the aberration problem caused by excessive focal length or thickness is avoided. However, in this case, the edge stray light of the tail-end lens and the tail-end spacer is easily increased. Therefore, by restricting -32.47≤f5 / R10xd5s≤-25.41, the exit angle of the edge field light in 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.

[0069] Of course, other parameter formulas in the above embodiments can also be included in the present 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, which comprises 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 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 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 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; 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; the at least one spacer includes the 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 the 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 air gap T67 of the sixth lens and the seventh lens on the optical axis, the air gap T45 of the fourth lens and the fifth lens on the optical axis, and the air gap T56 of the fifth lens and the sixth lens on the optical axis 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 and seven lenses, at least one spacer arranged in the lens barrel. By reasonably arranging the refractive power and surface type of the seven lenses, the positions of the fifth and sixth spacers, and setting the optical imaging lens to satisfy 0.69≤T67 / (T45+T56)≤0.85, the distribution of the fourth, fifth, sixth and seventh lenses can be effectively adjusted, so that the distribution of each lens is more reasonable, which is conducive to controlling the interval ratio between the sixth and seventh lenses, and conducive to ensuring the compactness of the rear-end structure. Further, by constraining -25.62≤f6 / d6s≤-23.28, the stray light generated by the edge structure part of the sixth lens is reduced, thereby weakening the influence of stray light on imaging quality and ensuring the imaging quality of the optical imaging lens.

[0072] Of course, other parameter formulas in the above embodiments can also be included in the present embodiment, which will not be described one by one here.

[0073] 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 a non-spherical surface. The characteristic of the aspherical lens is 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 aspherical lens has better curvature radius characteristics, which has the advantages of improving distortion aberration and improving astigmatism aberration. After using the 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 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.

[0075] Figure 1 The size annotation diagram of one optical imaging lens of the present application is shown, Figure 1 The parameters D4s, D2m, d6s, d5s, d3m, d4m, d6m, D6m, d0m, CP6, EP34, EP45, EP56, etc. 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 type of the specific lens, these parameters will not be embodied in the figure when specific embodiments are described later.

[0076] The specific surface type and parameters of the optical imaging lens applicable to the above embodiments are further described below with reference to the drawings.

[0077] It should be noted that there are two examples of Example 1-1, Example 1-2 in the following Example One, two examples of Example 2-1, Example 2-2 in Example Two, two examples of Example 3-1, Example 3-2 in Example Three, and two examples of Example 4-1, Example 4-2 in Example Four. The curvature radius, center thickness and other parameters of the first lens to the seventh lens of the optical imaging lens in the two examples in the same example 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 to say, the main structure for imaging is the same, and the auxiliary structure for imaging is different.

[0078] It should be noted that any one example in the following Example One to Example Four is applicable to all embodiments of the present application.

[0079] Example One

[0080] As shown in the following, Figures 2 to 6 The optical imaging lens of Example One is described. Figure 2 The structural schematic diagram of the optical imaging lens of Example 1-1 is shown, Figure 3 The structural schematic diagram of the optical imaging lens of Example 1-2 is shown.

[0081] As shown in the following, Figure 2 and Figure 3 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, a seventh lens E7 arranged in the lens barrel P0 in order from the object side to the image side.

[0082] As shown in the following, Figure 2 The structural schematic diagram of the optical imaging lens of Example 1-1 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.

[0083] like Figure 3 The diagram shows a schematic of the optical imaging lens in Embodiments 1-2. In this example, 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 abuts against the object side of the fourth auxiliary spacer, and the image side of the fourth auxiliary spacer abuts against the object side S9 of the fifth lens. The abutting and contact methods of the remaining spacers are the same as in Embodiment 1-1, and can be referred to the relevant descriptions in Embodiment 1-1, which will not be repeated here.

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

[0085] Table 2

[0086] Parameter / Embodiment 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 convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is concave, and the image-side surface S6 of the third lens is concave. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is concave, and the image-side surface S12 of the sixth lens is concave. The object-side surface S13 of the seventh lens is convex, and the image-side surface S14 of the seventh lens is concave.

[0088] In Embodiment 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 in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0090] Table 3

[0091]

[0092]

[0093] In Embodiment 1, the object-side surface and image-side surface of the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0094]

[0095] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 4 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 each aspherical mirror S1-S14 in Example 1.

[0096] Table 4

[0097]

[0098]

[0099] Figure 4 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of the focal point of light 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 plane curvature and the sagittal image plane curvature. Figure 6 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0100] according to Figures 4 to 6 As can be seen, the optical imaging lens given in Example 1 can achieve good imaging quality.

[0101] Example 2

[0102] like Figures 7 to 11 As shown, the optical imaging lens of Embodiment 2 is described. Figure 7 A schematic diagram of the optical imaging lens of Embodiment 2-1 is shown. Figure 8 A schematic diagram of the optical imaging lens of Embodiment 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 sequentially from the object side to the image side in the lens barrel P0.

[0104] like Figure 7 The diagram shows a schematic of the optical imaging lens in Embodiment 2-1. In this example, the object-side and image-side of the first spacer P1 abut against 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 abut against 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 abut against 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 abut against 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 abut against 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 abut against the image-side S12 of the sixth lens and the object-side S13 of the seventh lens, respectively.

[0105] like Figure 8 The diagram shown is a schematic representation of the optical imaging lens in Embodiment 2-2. In this example, 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 abuts against the object side of the fourth auxiliary spacer, and the image side of the fourth auxiliary spacer abuts against the object side S9 of the fifth lens. The abutting and contact methods of the remaining spacers are the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

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

[0107] Table 5

[0108] Parameter / Embodiment 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 embodiment two, 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.

[0110] In embodiment two, 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, the effective focal length f7 of the seventh lens is -16.41 mm.

[0111] Table 6 shows the basic structure parameter table of the optical imaging lens of embodiment two, wherein the units of the curvature radius, thickness / distance are millimeters mm.

[0112] Table 6

[0113]

[0114]

[0115] 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.

[0116] Table 7

[0117] Face No. 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 No. 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] 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 bending and sagittal image surface bending. 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.

[0119] According to Figures 9 to 11It can be seen that the optical imaging lens provided in Embodiment Two can achieve good imaging quality.

[0120] Embodiment Three

[0121] As shown in Figures 12 to 16 , the optical imaging lens of Embodiment Three is described. Figure 12 A structural schematic diagram of the optical imaging lens of Embodiment 3-1 is shown, Figure 13 A structural schematic diagram of the optical imaging lens of Embodiment 3-2 is shown.

[0122] As shown in Figure 12 and Figure 13 , 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.

[0123] As shown in Figure 12 , it is a structural schematic diagram of the optical imaging lens of Embodiment 3-1. In this example, the object side surface and the image side surface of the first spacer P1 are partially in abutment 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 abutment 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 abutment 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 abutment 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 abutment 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 abutment with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens, respectively.

[0124] As shown in Figure 13 , it is a structural schematic diagram of the optical imaging lens of Embodiment 3-2. In this example, the abutment modes of the remaining spacers are the same as those of Embodiment 3-1, and reference can be made to the relevant description in Embodiment 3-1, which will not be repeated here.

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

[0126] Table 8

[0127]

[0128]

[0129] 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.

[0130] In embodiment three, 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, the effective focal length f7 of the seventh lens is -23.27 mm.

[0131] Table 9 shows the basic structure parameter table of the optical imaging lens of embodiment three, wherein the units of the curvature radius, thickness / distance are millimeters mm.

[0132] Table 9

[0133]

[0134] 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 which can be used in embodiment three.

[0135] Table 10

[0136]

[0137]

[0138] Figure 14 The on-axis 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 curvature and sagittal image surface curvature. Figure 16 The magnification chromatic aberration curve of the optical imaging lens of embodiment three is shown, which represents the deviation of light rays on the imaging surface at different image heights after passing through the optical imaging lens.

[0139] According toFigures 14 to 16 It can be known that the optical imaging lens provided in Embodiment Three can achieve good imaging quality.

[0140] Embodiment Four

[0141] 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.

[0142] 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 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.

[0143] 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 abutment 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 abutment 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 abutment 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 abutment 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 abutment 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 abutment with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens, respectively.

[0144] As shown in Figure 18 , a structural schematic diagram of the optical imaging lens of Embodiment 4-2 is shown. In this example, the abutment modes of the remaining spacers are the same as those of Embodiment 4-1, and reference can be made to the relevant description in Embodiment 4-1, which will not be repeated here.

[0145] 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.

[0146] Table 11

[0147] Parameter / Embodiment 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 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 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.

[0149] In embodiment four, 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, the effective focal length f7 of the seventh lens is -23.20 mm.

[0150] 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.

[0151] Table 12

[0152]

[0153] The following table 13 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 four.

[0154] Table 13

[0155]

[0156]

[0157] 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 21 The 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 surface after passing through the optical imaging lens.

[0158] According to Figures 19 to 21It can be seen that the optical imaging lens provided in Embodiment Four can achieve good imaging quality.

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

[0160] Table 14

[0161] Conditional Expression / Embodiment 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 x d5s -25.41 -25.41 -28.18 -28.18 -32.47 -32.47 -31.79 -31.79 f5 / R9 x 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 Embodiments One to Four.

[0163] Table 15

[0164]

[0165]

[0166] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a stand-alone imaging apparatus 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.

[0167] 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 work should belong to the scope of protection of the present application.

[0168] 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 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.

[0169] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, 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 merely describes 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, The lens barrel includes a lens barrel body, and a lens group and at least one spacer disposed in the lens barrel body, The lens group is composed of seven lenses, which 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 includes a fifth spacer located between the fifth lens and the sixth lens and in partial contact with an image side surface of the fifth lens, and a sixth spacer located between the sixth lens and the seventh lens and in partial contact with an image side surface of the sixth lens. An effective focal length f6 of the sixth lens, a central thickness CT6 of the sixth lens on the optical axis, and an axial interval EP56 between the fifth spacer and the sixth spacer satisfy: -122.21≤f6 / (EP56+CT6)≤-106.

77. An inner diameter d6s of an object side surface of the sixth spacer, 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: -3.74 mm < d6s / (R12 / R11) < -1.73 mm. -1 -1 .​ 2.The optical imaging lens according to claim 1, wherein, An inner diameter d0m of an image side end surface of the lens barrel body and a curvature radius R14 of an image side surface of the seventh lens satisfy: 7.90≤d0m / R14≤8.

32. 3.The optical imaging lens according to claim 1, wherein, An outer diameter D6m of an 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 an object side surface of the seventh lens satisfy: 1.36≤(D6m-d6m) / R13≤1.

78. 4.The optical imaging lens according to claim 1, wherein, An air interval T67 of 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.

5. The optical imaging lens according to claim 1, characterized in that, An effective focal length f5 of the fifth lens, a curvature radius R10 of an image side surface of the fifth lens, and an inner diameter d5s of an object side surface of the fifth spacer satisfy: -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 partial contact with an image side surface of the fourth lens, An effective focal length f5 of the fifth lens, a curvature radius 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: -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 partial contact with an image side surface of the fourth lens, An effective focal length f5 of the fifth lens, an axial interval EP45 between the fourth spacer and the fifth spacer, and an air interval T56 of 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 partial contact with an image side surface of the third lens, and a fourth spacer located between the fourth lens and the fifth lens and in partial contact with an image side surface of the fourth lens, An effective focal length f4 of the fourth lens, an air separation T45 of the fourth lens and the fifth lens on the optical axis, an axial separation 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 between the third lens and the fourth lens and in contact with a part of an image side surface of the third lens, A curvature radius R7 of an object side surface of the fourth lens and an inner diameter d3m of an image side surface of the third spacer satisfy: 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 between the fourth lens and the fifth lens and in contact with a part of an image side surface of the fourth lens, A curvature radius R8 of an image side surface of the fourth lens and an outer diameter D4s of an object side surface of the fourth spacer satisfy: 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 between the second lens and the third lens and in contact with a part of an image side surface of the second lens, A curvature radius R5 of an object side surface of the third lens and an outer diameter D2m of an image side surface of the second spacer satisfy: -43.38≤R5 / D2m≤-23.

31.

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

13. The optical imaging lens according to any one of claims 1-11, wherein, The second lens has positive refractive power, an object side surface of the second lens is convex, and an image side surface is concave; the third lens has negative refractive power, an object side surface of the third lens is concave, and an image side surface is concave; the fourth lens has negative refractive power, an object side surface of the fourth lens is convex, and an image side surface is concave; the fifth lens has positive refractive power, an object side surface of the fifth lens is concave, and an image side surface is convex.

Images