Shooting optical lens

Abstract

The utility model relates to the field of optical lenses, and discloses a camera shooting optical lens, which sequentially comprises a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power and a sixth lens with positive refractive power from an object side to an image side, and a seventh lens element with negative refractive power; the following relational expressions are satisfied:-0.300 < = Sin (A1.0out14) * R14 / f7 < = 0.003; 1.05 < = (f1 + f2 + f3 + f4) / (f5 + f6 + f7) < = 2.30; -1.40 < = Sin (A0.8 out8) * R8 / f4 < = 0.10.

Description

Technical Field

[0001] The utility model relates to the field of optical lenses, and particularly to an imaging optical lens applicable to handheld terminal devices such as smart phones and digital cameras, as well as imaging devices such as monitors, PC lenses, and vehicle-mounted lenses. Background Art

[0002] In recent years, with the rise of various intelligent devices, the demand for miniaturized imaging optical lenses has been increasing day by day. In addition, due to the reduction of the pixel size of the photosensitive device, and considering the current development trend of electronic products towards a good-function, thin, and portable appearance, miniaturized imaging optical lenses with good imaging quality have become the mainstream in the current market. To obtain better imaging quality, a multi-lens structure is mostly adopted. Moreover, with the development of technology and the increasing diversification of user requirements, in the case where the pixel area of the photosensitive device is continuously reduced and the system's requirements for imaging quality are continuously improved, a seven-lens structure has gradually emerged in lens design. There is an urgent need for a wide-angle imaging lens with excellent optical characteristics, a large aperture, wide-angle, ultra-thin, and fully corrected aberration. Summary of the Utility Model

[0003] Aiming at the above problems, the purpose of the utility model is to provide an imaging optical lens, which has good optical performance while meeting the design requirements of fully corrected aberration, large aperture, wide-angle, ultra-thin, diverse structural design, and high sensor matching degree.

[0004] To achieve the above purpose, the technical solution of the utility model provides an imaging optical lens, which comprises seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power;

[0005] The object side surface of the first lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the second lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the third lens is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, and the image side surface is concave at the paraxial region;

[0006] Among them, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central radius of curvature of the image side of the fourth lens at the paraxial region is R8, the central radius of curvature of the object side of the fifth lens at the paraxial region is R9, the central radius of curvature of the image side of the fifth lens at the paraxial region is R10, the central radius of curvature of the image side of the seventh lens at the paraxial region is R14, the entrance pupil diameter of the imaging optical lens is ENPD, the field angle of the 1.0 field of view of the imaging optical lens is FOV, the axial distance from the image side of the first lens to the object side of the second lens is d2, the axial distance from the image side of the second lens to the object side of the third lens is d4, the angle between the chief ray of the 1.0 field of view of the imaging optical lens and the optical axis when it exits from the image side of the seventh lens is Sin(A1.0out14), the angle between the chief ray of the 0.8 field of view of the imaging optical lens and the optical axis when it exits from the image side of the fourth lens is Sin(A0.8out8), and the following relational expressions are satisfied:

[0007] -1.40 ≤ f3 / f4 ≤ -0.60;

[0008] 1.20 ≤ R9 / R10 ≤ 1.90;

[0009] 5.10 ≤ ENPD / Tan(FOV / 2) ≤ 5.70;

[0010] 0.30 ≤ d2 / d4 ≤ 0.60;

[0011] -0.300 ≤ Sin(A1.0out14)*R14 / f7 ≤ 0.003;

[0012] 1.05 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.30;

[0013] -1.40 ≤ Sin(A0.8out8)*R8 / f4 ≤ 0.10.

[0014] Preferably, the following relational expression is satisfied: 0.30 ≤ d2 / d4 ≤ 0.50.

[0015] Preferably, the following relational expression is satisfied: -0.230 ≤ Sin(A1.0out14)*R14 / f7 ≤ 0.003.

[0016] Preferably, the following relational expression is satisfied: 1.25 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.00.

[0017] Preferably, the following relationship is satisfied: -1.20 ≤ Sin(A0.8out8)*R8 / f4 ≤ 0.10.

[0018] Preferably, the on-axis thickness of the sixth lens is d11, and the following relationship is satisfied: 9.00 ≤ f6 / d11 ≤ 16.00.

[0019] Preferably, the following relationship is satisfied: 11.00 ≤ f6 / d11 ≤ 14.00.

[0020] Preferably, the first lens is a glass lens.

[0021] The technical solution of the present utility model further provides a camera optical lens, which comprises seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power;

[0022] The object side surface of the first lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the second lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the third lens is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, and the image side surface is concave at the paraxial region;

[0023] Among them, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7. The central curvature radius of the object side surface of the first lens at the paraxial region is R1, the central curvature radius of the image side surface of the second lens at the paraxial region is R4, the central curvature radius of the object side surface of the third lens at the paraxial region is R5, the central curvature radius of the image side surface of the fourth lens at the paraxial region is R8, the central curvature radius of the image side surface of the seventh lens at the paraxial region is R14. The angle between the chief ray of the 1.0 field of view of the imaging optical lens and the optical axis when it exits from the image side surface of the seventh lens is Sin(A1.0out14), the angle between the chief ray of the 0.8 field of view of the imaging optical lens and the optical axis when it exits from the image side surface of the fourth lens is Sin(A0.8out8), the maximum incident angle of all the chief rays of the imaging optical lens on the image plane is CRAmax, and the following relational expressions are satisfied:

[0024] -0.300 ≤ Sin(A1.0out14) * R14 / f7 ≤ 0.003;

[0025] 1.05 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.30;

[0026] -1.40 ≤ Sin(A0.8out8) * R8 / f4 ≤ 0.10;

[0027] 1.60 ≤ f1 / R1 + f4 / R8 ≤ 3.00;

[0028] -14.00 ≤ f2 / R4 + f3 / R5 ≤ -5.50;

[0029] 35.00° ≤ CRAmax ≤ 40.00°.

[0030] Preferably, the following relational expression is satisfied: 1.95 ≤ f1 / R1 + f4 / R8 ≤ 2.55.

[0031] Preferably, the following relational expression is satisfied: -12.00 ≤ f2 / R4 + f3 / R5 ≤ -7.00.

[0032] Preferably, the following relational expression is satisfied: -0.230 ≤ Sin(A1.0out14) * R14 / f7 ≤ 0.003.

[0033] Preferably, the following relational expression is satisfied: 1.25 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.00.

[0034] Preferably, the following relationship is satisfied: -1.20 ≤ Sin(A0.8out8) * R8 / f4 ≤ 0.10.

[0035] Preferably, the on-axis thickness of the seventh lens is d13, and the following relationship is satisfied: -15.00 ≤ f7 / d13 ≤ -8.50.

[0036] Preferably, the following relationship is satisfied: -12.00 ≤ f7 / d13 ≤ -10.00.

[0037] Preferably, the following relationship is satisfied: -4.80 ≤ f7 / R14 ≤ -1.60.

[0038] Preferably, the following relationship is satisfied: -4.00 ≤ f7 / R14 ≤ -2.00.

[0039] Preferably, the first lens is a glass lens.

[0040] The beneficial effects of the present utility model are as follows: The imaging optical lens according to the present utility model has excellent optical characteristics, and has the characteristics of sufficient aberration correction, large aperture, wide-angle, ultra-thin, diverse structural design, and high sensor matching degree, and is particularly suitable for mobile phone imaging lens assemblies, WEB imaging lenses, and vehicle-mounted lenses composed of imaging elements such as CCD and CMOS for high pixels. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0042] Figure 1 is a schematic structural diagram of the imaging optical lens according to the first embodiment of the present utility model;

[0043] Figure 2 is Figure 1 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0044] Figure 3 is Figure 1 a schematic diagram of the longitudinal chromatic aberration of the imaging optical lens shown;

[0045] Figure 4 is Figure 1 a schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0046] Figure 5 is a schematic structural diagram of the imaging optical lens according to the second embodiment of the present utility model;

[0047] Figure 6 is Figure 5 The schematic diagram of the axial aberration of the imaging optical lens shown;

[0048] Figure 7 is Figure 5 The schematic diagram of the lateral chromatic aberration of the imaging optical lens shown;

[0049] Figure 8 is Figure 5 The schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0050] Figure 9 It is the schematic diagram of the structure of the imaging optical lens according to the third embodiment of the present invention;

[0051] Figure 10 is Figure 9 The schematic diagram of the axial aberration of the imaging optical lens shown;

[0052] Figure 11 is Figure 9 The schematic diagram of the lateral chromatic aberration of the imaging optical lens shown;

[0053] Figure 12 is Figure 9 The schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0054] Figure 13 It is the schematic diagram of the structure of the imaging optical lens according to the fourth embodiment of the present invention;

[0055] Figure 14 is Figure 13 The schematic diagram of the axial aberration of the imaging optical lens shown;

[0056] Figure 15 is Figure 13 The schematic diagram of the lateral chromatic aberration of the imaging optical lens shown;

[0057] Figure 16 is Figure 13 The schematic diagram of the field curvature and distortion of the imaging optical lens shown. Specific embodiments

[0058] To make the objectives, technical solutions and advantages of the present invention clearer, the following will elaborate on each embodiment of the present invention with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are provided to help readers better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present invention can still be implemented.

[0059] Refer to the attachedFigure 1-16 , the technical solution of the present utility model provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5 , as shown in FIGS. 9 and 13, the camera optical lens 10, 20, 30, 40 of the present utility model includes a total of seven lenses. Specifically, the camera optical lens, from the object side to the image side in sequence is: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7. Optical elements such as an optical filter (filter) GF can be provided between the seventh lens L7 and the image plane Si.

[0060] The first lens L1 is a glass lens, the second lens L2 is a plastic lens, the third lens L3 is a plastic lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens. The combination of the glass lens and the resin lens is used to reduce chromatic aberration and improve the performance of the optical camera lens. Each lens can also be made of other materials.

[0061] The object side and the image side of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are all aspherical surfaces.

[0062] The object side of the first lens L1 is convex at the paraxial region, and the image side is concave at the paraxial region. The first lens L1 has a positive refractive power. The object side and the image side of the first lens L1 can also be set to other concave and convex distribution situations.

[0063] The object side of the second lens L2 is convex at the paraxial region, and the image side is concave at the paraxial region. The second lens L2 has a negative refractive power. The object side and the image side of the second lens L2 can also be set to other concave and convex distribution situations.

[0064] The object side of the third lens L3 is concave at the paraxial region, and the image side is concave at the paraxial region. The third lens L3 has a negative refractive power. The object side and the image side of the third lens L3 can also be set to other concave and convex distribution situations.

[0065] The object side of the fourth lens L4 is convex at the paraxial region, and the image side is convex at the paraxial region. The fourth lens L4 has a positive refractive power. The object side and the image side of the fourth lens L4 can also be set to other concave and convex distribution situations.

[0066] The object side of the fifth lens L5 is convex at the paraxial region, and the image side is concave at the paraxial region. The fifth lens L5 has a negative refractive power. The object side and the image side of the fifth lens L5 can also be set to other concave and convex distribution situations.

[0067] The object side of the sixth lens L6 is convex in the paraxial region, and the image side is convex in the paraxial region. The sixth lens L6 has a positive refractive power. The object side and the image side of the sixth lens L6 can also be set to other concave and convex distribution cases.

[0068] The object side of the seventh lens L7 is convex in the paraxial region, and the image side is concave in the paraxial region. The seventh lens L7 has a negative refractive power. The object side and the image side of the seventh lens L7 can also be set to other concave and convex distribution cases.

[0069] Define the focal length of the third lens L3 as f3 and the focal length of the fourth lens L4 as f4, satisfying the following relationship: -1.40 ≤ f3 / f4 ≤ -0.60. Within the range of the relationship, by reasonably distributing the focal length ratio of the third lens and the fourth lens, it is possible to avoid excessive deflection of light when passing through the system, reduce the difficulty of aberration correction, and at the same time better correct the field curvature and distortion of the lens, ensuring that the field curvature and distortion of the lens are controlled at a relatively small level and achieving high-pixel imaging of the system.

[0070] Define the central curvature radius of the object side of the fifth lens L5 in the paraxial region as R9, and the central curvature radius of the image side of the fifth lens L5 in the paraxial region as R10, satisfying the following relationship: 1.20 ≤ R9 / R10 ≤ 1.90. Within the range of the relationship, the fifth lens can have a relatively small refractive power, and when paired with the fourth lens, it can better correct the chromatic aberration of the system and improve the overall imaging quality.

[0071] Define the entrance pupil diameter of the imaging optical lens as ENPD, and the field angle of the 1.0 field of view of the imaging optical lens as FOV, satisfying the following relationship: 5.10 ≤ ENPD / Tan(FOV / 2) ≤ 5.70. By restricting the entrance pupil diameter and the field angle within a reasonable range, it is possible to achieve a small FNO lens, increase the amount of incident light, and at the same time meet the requirement of wide-angleization.

[0072] Define the axial distance from the image side of the first lens L1 to the object side of the second lens L2 as d2, and the axial distance from the image side of the second lens L2 to the object side of the third lens L3 as d4, satisfying the following relationship: 0.30 ≤ d2 / d4 ≤ 0.60. By reasonably setting the air gap between the first to third lenses, the peripheral structure of the lens, especially the thickness of the peripheral part of the lens, can be reasonably designed, making the design of the connection structure between the lenses more diverse. Preferably, 0.30 ≤ d2 / d4 ≤ 0.50.

[0073] Define the angle between the chief ray of the 1.0 field of view of the imaging optical lens when it exits from the image side of the seventh lens L7 and the optical axis as Sin(A1.0out14), the focal length of the seventh lens L7 as f7, and the central radius of curvature of the image side of the seventh lens L7 at the paraxial region as R14. The following relationship is satisfied: -0.300 ≤ Sin(A1.0out14) * R14 / f7 ≤ 0.003. By controlling the relationship between the angle between the chief ray of the 1.0 field of view when it exits from the image side of the seventh lens and the optical axis, the central radius of curvature of the image side of the seventh lens, and the focal length of the seventh lens, it is beneficial to increase the image height to match a large-image-height sensor, and at the same time, it is beneficial to better match the chief ray angle of the imaging sensor in the 1.0 field of view to obtain a higher-quality image. Preferably, -0.230 ≤ Sin(A1.0out14) * R14 / f7 ≤ 0.003.

[0074] Define the focal length of the first lens L1 as f1, the focal length of the second lens L2 as f2, the focal length of the third lens L3 as f3, the focal length of the fourth lens L4 as f4, the focal length of the fifth lens L5 as f5, the focal length of the sixth lens L6 as f6, and the focal length of the seventh lens L7 as f7. The following relationship is satisfied: 1.05 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.30. Reasonably controlling the optical power of each lens is beneficial to achieving a wide-angle and ultra-thin effect. At the same time, the last three lenses can better correct aberrations. Preferably, 1.25 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.00.

[0075] Define the angle between the chief ray of the 0.8 field of view of the imaging optical lens when it exits from the image side of the fourth lens L4 and the optical axis as Sin(A0.8out8), the central radius of curvature of the image side of the fourth lens L4 at the paraxial region as R8, and the focal length of the fourth lens L4 as f4. The following relationship is satisfied: -1.40 ≤ Sin(A0.8out8) * R8 / f4 ≤ 0.10. By controlling the relationship between the angle between the chief ray of the 0.8 field of view when it exits from the image side of the fourth lens and the optical axis, the central radius of curvature of the image side of the fourth lens, and the focal length of the fourth lens, it is beneficial to better match the chief ray angle of the imaging sensor in the 0.8 field of view to obtain a higher-quality image. At the same time, it is beneficial for the imaging optical lens to better adjust the light focusing position, improve the light converging ability of the imaging optical lens, and effectively balance the axial aberration of the imaging optical lens. Preferably, -1.20 ≤ Sin(A0.8out8) * R8 / f4 ≤ 0.10.

[0076] Define the on-axis thickness of the sixth lens L6 as d11, satisfying the following relational expression: 9.00 ≤ f6 / d11 ≤ 16.00. Reasonably controlling the ratio of the focal length to the on-axis thickness of the sixth lens is beneficial to correcting aberration and improving the processability of the sixth lens. Preferably, 11.00 ≤ f6 / d11 ≤ 14.00.

[0077] Define the central curvature radius of the object side surface of the first lens L1 at the paraxial region as R1, satisfying the following relational expression: 1.60 ≤ f1 / R1 + f4 / R8 ≤ 3.00. Within the range of the conditional expression, it is beneficial to reduce the assembly sensitivity of the first four lenses, improve the assembly yield, and reduce aberration at the same time. Preferably, 1.95 ≤ f1 / R1 + f4 / R8 ≤ 2.55.

[0078] Define the central curvature radius of the image side surface of the second lens L2 at the paraxial region as R4, and the central curvature radius of the object side surface of the third lens L3 at the paraxial region as R5, satisfying the following relational expression: -14.00 ≤ f2 / R4 + f3 / R5 ≤ -5.50. Within the range of the conditional expression, it is beneficial for the imaging optical lens to better adjust the light focusing position, improve the light converging ability of the imaging optical lens, and effectively balance the on-axis aberration of the imaging optical lens. Preferably, -12.00 ≤ f2 / R4 + f3 / R5 ≤ -7.00.

[0079] Define the maximum incident angle of all chief rays of the imaging optical lens on the image plane Si as CRAmax, satisfying the following relational expression: 35.00° ≤ CRAmax ≤ 40.00°. Within the range of the conditional expression, control the maximum incident angle of the chief rays to match the imaging sensor, thereby obtaining higher image quality.

[0080] Define the on-axis thickness of the seventh lens L7 as d13, satisfying the following relational expression: -15.00 ≤ f7 / d13 ≤ -8.50. Within the range of the conditional expression, it is beneficial to adjust the shape and processability of the seventh lens to improve the production yield. Preferably, -12.00 ≤ f7 / d13 ≤ -10.00.

[0081] The focal length of the seventh lens L7 is f7, and the central curvature radius of the image side surface of the seventh lens L7 at the paraxial region is R14, satisfying the following relational expression: -4.80 ≤ f7 / R14 ≤ -1.60. Within the range of the conditional expression, it is beneficial to adjust the shape and refractive power of the seventh lens to correct aberration. Preferably, -4.00 ≤ f7 / R14 ≤ -2.00.

[0082] Compared with the prior art, the imaging optical lens provided by the present utility model is configured with: -1.40 ≤ f3 / f4 ≤ -0.60; 1.20 ≤ R9 / R10 ≤ 1.90; 5.10 ≤ ENPD / Tan(FOV / 2) ≤ 5.70; 0.30 ≤ d2 / d4 ≤ 0.60; -0.300 ≤ Sin(A1.0out14)*R14 / f7 ≤ 0.003; 1.05 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.30; -1.40 ≤ Sin(A0.8out8)*R8 / f4 ≤ 0.10 to control the degree of optical deflection, reduce the difficulty of aberration correction, ensure that the field curvature and distortion of the lens are controlled at a relatively low level, and achieve high-pixel imaging of the system. At the same time, the fifth lens has a relatively small refractive power, and when paired with the fourth lens, it can better correct the chromatic aberration of the system, improve the overall imaging quality, realize a lens with a small FNO and a large aperture, increase the light input while meeting the requirement of wide-angleization. By reasonably designing the peripheral structure of the lens, especially the thickness of the peripheral part of the lens, the design of the connection structure between the lenses is made more diverse. In addition, while increasing the image height to match the large-image-height sensor, it is also beneficial to better match the principal ray angle of the imaging sensor at the 1.0 field of view and the 0.8 field of view, thereby obtaining a higher-quality image. And by reasonably controlling the optical power of each lens, it is beneficial to achieve the effects of wide-angleization and ultra-thinness. The last three lenses can better correct aberration, which is beneficial for the imaging optical lens to better adjust the light focusing position, improve the light converging ability of the imaging optical lens, and effectively balance the axial aberration of the imaging optical lens.

[0083] In addition, compared with the prior art, the present utility model can also be configured with: -0.300 ≤ Sin(A1.0out14)*R14 / f7 ≤ 0.003; 1.05 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.30; -1.40 ≤ Sin(A0.8out8)*R8 / f4 ≤ 0.10; 1.60 ≤ f1 / R1 + f4 / R8 ≤ 3.00; -14.00 ≤ f2 / R4 + f3 / R5 ≤ -5.50; 35.00° ≤ CRAmax ≤ 40.00°. While being beneficial to increasing the image height to match the large-image-height sensor, it can also better match the principal ray angle of the imaging sensor at the 1.0 field of view and the 0.8 field of view, obtaining a higher-quality image. And by reasonably controlling the optical power of each lens, it is beneficial to achieve the effects of wide-angleization and ultra-thinness. The last three lenses can also better correct aberration, enabling the imaging optical lens to better adjust the light focusing position, improve the light converging ability of the imaging optical lens, and effectively balance the axial aberration of the imaging optical lens. In addition, it is beneficial to reduce the assembly sensitivity of the first four lenses and improve the assembly yield.

[0084] The following will illustrate the imaging optical lens of the present utility model with examples. The symbols described in each example are as follows. The units of focal length, on-axis distance, central radius of curvature, and on-axis thickness are mm.

[0085] TTL: The total optical length (the on-axis distance from the object side of the first lens L1 to the image plane Si), unit: mm;

[0086] Aperture value FNO: It refers to the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter.

[0087] Next, the technical solutions of the present utility model will be specifically described with four embodiments.

[0088] (The first embodiment)

[0089] Table 1 and Table 2 show the design data of the imaging optical lens 10 of the first embodiment of the present utility model.

[0090]

Table 1

[0091]

[0092] Among them, the meanings of each symbol are as follows.

[0093] S1: Aperture;

[0094] R: The radius of curvature at the center of the optical surface;

[0095] R1: The central radius of curvature of the object side of the first lens L1 at the paraxial region;

[0096] R2: The central radius of curvature of the image side of the first lens L1 at the paraxial region;

[0097] R3: The central radius of curvature of the object side of the second lens L2 at the paraxial region;

[0098] R4: The central radius of curvature of the image side of the second lens L2 at the paraxial region;

[0099] R5: The central radius of curvature of the object side of the third lens L3 at the paraxial region;

[0100] R6: The central radius of curvature of the image side of the third lens L3 at the paraxial region;

[0101] R7: The central radius of curvature of the object side of the fourth lens L4 at the paraxial region;

[0102] R8: The central radius of curvature of the image side of the fourth lens L4 at the paraxial region;

[0103] R9: The central radius of curvature of the object side of the fifth lens L5 at the paraxial region;

[0104] R10: The central radius of curvature of the image side of the fifth lens L5 at paraxial region;

[0105] R11: The central radius of curvature of the object side of the sixth lens L6 at paraxial region;

[0106] R12: The central radius of curvature of the image side of the sixth lens L6 at paraxial region;

[0107] R13: The central radius of curvature of the object side of the seventh lens L7 at paraxial region;

[0108] R14: The central radius of curvature of the image side of the seventh lens L7 at paraxial region;

[0109] R15: The central radius of curvature of the object side of the optical filter GF at paraxial region;

[0110] R16: The central radius of curvature of the image side of the optical filter GF at paraxial region;

[0111] d: The on-axis thickness of the lens, the on-axis distance between lenses;

[0112] d0: The on-axis distance from the aperture S1 to the object side of the first lens L1;

[0113] d1: The on-axis thickness of the first lens L1;

[0114] d2: The on-axis distance from the image side of the first lens L1 to the object side of the second lens L2;

[0115] d3: The on-axis thickness of the second lens L2;

[0116] d4: The on-axis distance from the image side of the second lens L2 to the object side of the third lens L3;

[0117] d5: The on-axis thickness of the third lens L3;

[0118] d6: The on-axis distance from the image side of the third lens L3 to the object side of the fourth lens L4;

[0119] d7: The on-axis thickness of the fourth lens L4;

[0120] d8: The on-axis distance from the image side of the fourth lens L4 to the object side of the fifth lens L5;

[0121] d9: The on-axis thickness of the fifth lens L5;

[0122] d10: The on-axis distance from the image side of the fifth lens L5 to the object side of the sixth lens L6;

[0123] d11: The on-axis thickness of the sixth lens L6;

[0124] d12: The on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

[0125] d13: The on-axis thickness of the seventh lens L7;

[0126] d14: The on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

[0127] d15: The on-axis thickness of the optical filter GF;

[0128] d16: The on-axis distance from the image side surface of the optical filter GF to the image plane Si;

[0129] nd: The refractive index of the d-line (the d-line is green light with a wavelength of 550 nm);

[0130] nd1: The refractive index of the d-line of the first lens L1;

[0131] nd2: The refractive index of the d-line of the second lens L2;

[0132] nd3: The refractive index of the d-line of the third lens L3;

[0133] nd4: The refractive index of the d-line of the fourth lens L4;

[0134] nd5: The refractive index of the d-line of the fifth lens L5;

[0135] nd6: The refractive index of the d-line of the sixth lens L6;

[0136] nd7: The refractive index of the d-line of the seventh lens L7;

[0137] ndg: The refractive index of the d-line of the optical filter GF;

[0138] vd: The Abbe number;

[0139] v1: The Abbe number of the first lens L1;

[0140] v2: The Abbe number of the second lens L2;

[0141] v3: The Abbe number of the third lens L3;

[0142] v4: The Abbe number of the fourth lens L4;

[0143] v5: The Abbe number of the fifth lens L5;

[0144] v6: The Abbe number of the sixth lens L6;

[0145] v7: The Abbe number of the seventh lens L7;

[0146] vg: The Abbe number of the optical filter GF.

[0147] Table 2 shows the aspherical data of each lens in the imaging optical lens 10 of the first embodiment of the present invention.

[0148] [Table 2]

[0149]

[0150]

[0151] For convenience, the aspherical surfaces of each lens surface use the aspherical surface shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by this formula (1). z = (cr 2 ) / {1 + [1 - (k + 1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0152] Among them, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance from the point on the aspherical curve to the optical axis, and z is the aspherical depth (the perpendicular distance between the point on the aspherical surface with a distance r from the optical axis and the tangent plane at the vertex of the aspherical surface on the optical axis).

[0153] Figure 2 , Figure 3 respectively show the axial aberration and chromatic aberration of magnification diagrams of light with wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm after passing through the imaging optical lens 10 of the first embodiment. Figure 4 shows the field curvature and distortion diagrams of light with a wavelength of 546nm after passing through the imaging optical lens 10 of the first embodiment. Figure 4 The field curvature S of

[0154] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 10 is 4.806 mm, the image height IH of the full field of view (1.0 field of view) is 8.000 mm, the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 85.59°, the image height IH of the MIC field of view is 8.230 mm, and the field of view angle FOV in the diagonal direction of the MIC field of view is 87.37°. The imaging optical lens 10 meets the design requirements of large aperture, wide angle, ultra-thin, diverse structural design, and high sensor matching degree. Its axial and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0155] It can be understood that the image height of the 1.0 field of view refers to half of the diagonal length of the effective pixel area of the sensor; the image height of the MIC field of view refers to the field of view height that extends outside the image height of the 1.0 field of view to prevent assembly deviation; the FOV in the diagonal direction of the 1.0 field of view refers to the field of view angle corresponding to the effective pixel area of the sensor; the FOV in the diagonal direction of the MIC field of view refers to the field of view angle corresponding to the image height of the MIC field of view.

[0156] (Second Embodiment)

[0157] The symbolic meanings in the second embodiment are the same as those in the first embodiment.

[0158] Figure 5 Shown is the imaging optical lens 20 of the second embodiment of the present utility model.

[0159] Tables 3 and 4 show the design data of the imaging optical lens 20 of the second embodiment of the present utility model.

[0160]

Table 3

[0161]

[0162]

[0163] Table 4 shows the aspherical data of each lens in the imaging optical lens 20 of the second embodiment of the present utility model.

[0164]

Table 4

[0165]

[0166]

[0167] Figure 6 、 Figure 7 Respectively show the schematic diagrams of the axial aberration and chromatic aberration of magnification after light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm passes through the imaging optical lens 20 of the second embodiment. Figure 8It shows a schematic diagram of the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0168] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 4.926 mm, the image height IH of the full field of view (1.0 field of view) is 8.000 mm, the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.77°, the image height IH of the MIC field of view is 8.230 mm, and the field of view angle FOV in the diagonal direction of the MIC field of view is 86.60°. The imaging optical lens 20 meets the design requirements of large aperture, wide angle, ultra-thin, diverse structural design, and high sensor matching. Its axial and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0169] (Third Embodiment)

[0170] The symbol meanings in the third embodiment are the same as those in the first embodiment.

[0171] Figure 9 Shown is the imaging optical lens 30 of the third embodiment of the present invention.

[0172] Table 5 and Table 6 show the design data of the imaging optical lens 30 of the third embodiment of the present invention.

[0173]

Table 5

[0174]

[0175] Table 6 shows the aspheric data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.

[0176]

Table 6

[0177]

[0178]

[0179] Figure 10 、 Figure 11 Respectively show schematic diagrams of the axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 30 of the third embodiment. Figure 12 It shows a schematic diagram of the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment. Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0180] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 4.868 mm, the image height IH at the full field of view (1.0 field of view) is 8.000 mm, the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.97°, the image height IH of the MIC field of view is 8.290 mm, and the field of view angle FOV in the diagonal direction of the MIC field of view is 87.18°. The imaging optical lens 30 meets the design requirements of large aperture, wide angle, ultra-thin, diverse structural design, and high sensor matching degree. Its axial and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0181] (Fourth Embodiment)

[0182] The symbol meanings in the fourth embodiment are the same as those in the first embodiment.

[0183] Figure 13 Shown is the imaging optical lens 40 of the fourth embodiment of the present utility model.

[0184] Tables 7 and 8 show the design data of the imaging optical lens 40 of the fourth embodiment of the present utility model.

[0185]

Table 7

[0186]

[0187] Table 8 shows the aspherical data of each lens in the imaging optical lens 40 of the fourth embodiment of the present utility model.

[0188]

Table 8

[0189]

[0190]

[0191] Figure 14 、 Figure 15 Respectively show the axial aberration and chromatic aberration of magnification diagrams of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 40 of the fourth embodiment. Figure 16 Then shows the field curvature and distortion diagrams of light with a wavelength of 546 nm after passing through the imaging optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0192] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 40 is 4.918 mm, the image height IH at the full field of view (1.0 field of view) is 8.000 mm, the field of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.00°, the image height IH of the MIC field of view is 8.230 mm, the field of view FOV in the diagonal direction of the MIC field of view is 85.71°. The imaging optical lens 40 meets the design requirements of large aperture, wide angle, ultra-thin, diverse structural design, and high sensor matching. Its axial and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0193]

Table 9

[0194] Parameters and conditional expressions First embodiment Second embodiment Third embodiment Fourth embodiment f3 / f4 -1.00 -0.61 -1.01 -1.39 R9 / R10 1.49 1.20 1.42 1.90 ENPD / Tan(FOV / 2) 5.19 5.40 5.32 5.46 d2 / d4 0.46 0.38 0.44 0.40 Sin(A1.0out14)*R14 / f7 0.001 0.001 -0.225 0.002 (f1+f2+f3+f4) / (f5+f6+f7) 1.65 1.31 1.67 1.91 Sin(A0.8out8)*R8 / f4 0.02 0.04 -1.13 0.06 f1 / R1+f4 / R8 2.06 2.30 2.34 2.45 f2 / R4+f3 / R5 -7.83 -11.56 -7.97 -7.24 CRAmax 37.40 36.20 37.80 39.20 f 8.41 8.472 8.518 8.591 f1 10.008 9.935 10.136 10.178 f2 -89.864 -111.424 -88.341 -77.072 f3 -40.121 -42.795 -37.997 -42.465 f4 40.011 70.27 37.808 30.519 f5 -49.524 -57.128 -47.993 -42.8 f6 7.675 8.089 7.617 7.554 f7 -6.664 -7.507 -6.635 -6.029 FNO 1.750 1.720 1.750 1.747 TTL 10.081 10.122 10.150 10.104

[0195] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present utility model. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the present utility model.

Claims

1. An imaging optical lens, characterized in that, The imaging optical lens comprises seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; The object side surface of the first lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the second lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the third lens is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; Wherein, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central curvature radius of the image side surface of the fourth lens at the paraxial region is R8, the central curvature radius of the object side surface of the fifth lens at the paraxial region is R9, the central curvature radius of the image side surface of the fifth lens at the paraxial region is R10, the central curvature radius of the image side surface of the seventh lens at the paraxial region is R14, the entrance pupil diameter of the imaging optical lens is ENPD, the field of view angle of the 1.0 field of view of the imaging optical lens is FOV, the axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, the axial distance from the image side surface of the second lens to the object side surface of the third lens is d4, the angle between the chief ray of the 1.0 field of view of the imaging optical lens and the optical axis when it exits from the image side surface of the seventh lens is Sin(A1.0out14), the angle between the chief ray of the 0.8 field of view of the imaging optical lens and the optical axis when it exits from the image side surface of the fourth lens is Sin(A0.8out8), and the following relational expressions are satisfied: -1.40 ≤ f3 / f4 ≤ -0.60; 1.20 ≤ R9 / R10 ≤ 1.90; 5.10 ≤ ENPD / Tan(FOV / 2) ≤ 5.70; 0.30 ≤ d2 / d4 ≤ 0.60; -0.300 ≤ Sin(A1.0out14)*R14 / f7 ≤ 0.003; 1.05 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.30; -1.40 ≤ Sin(A0.8out8)*R8 / f4 ≤ 0.

10.

2. The imaging optical lens according to claim 1, wherein The following relational expression is satisfied: 0.30 ≤ d2 / d4 ≤ 0.

50.

3. The imaging optical lens according to claim 1, characterized in that, The following relational expression is satisfied: -0.230 ≤ Sin(A1.0out14)*R14 / f7 ≤ 0.

003.

4. The imaging optical lens according to claim 1, wherein Satisfy the following relationship: 1.25 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.

00.

5. The imaging optical lens according to claim 1, characterized in that, Satisfy the following relationship: -1.20 ≤ Sin(A0.8out8)*R8 / f4 ≤ 0.

10.

6. The imaging optical lens according to claim 1, characterized in that, The on-axis thickness of the sixth lens is d11, and satisfy the following relationship: 9.00 ≤ f6 / d11 ≤ 16.

00.

7. The imaging optical lens according to claim 6, wherein Satisfy the following relationship: 11.00 ≤ f6 / d11 ≤ 14.

00.

8. The imaging optical lens according to claim 1, wherein The first lens is a glass lens.

9. An imaging optical lens, characterized in that, The imaging optical lens comprises seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; The object side surface of the first lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the second lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the third lens is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; Wherein, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central curvature radius of the object side surface of the first lens at the paraxial region is R1, the central curvature radius of the image side surface of the second lens at the paraxial region is R4, the central curvature radius of the object side surface of the third lens at the paraxial region is R5, the central curvature radius of the image side surface of the fourth lens at the paraxial region is R8, the central curvature radius of the image side surface of the seventh lens at the paraxial region is R14, the angle between the chief ray of the 1.0 field of view of the imaging optical lens and the optical axis when it exits from the image side surface of the seventh lens is Sin(A1.0out14), the angle between the chief ray of the 0.8 field of view of the imaging optical lens and the optical axis when it exits from the image side surface of the fourth lens is Sin(A0.8out8), the maximum incident angle of all the chief rays of the imaging optical lens on the image plane is CRAmax, and satisfy the following relationships: -0.300 ≤ Sin(A1.0out14)*R14 / f7 ≤ 0.003; 1.05 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.30; -1.40 ≤ Sin(A0.8out8)*R8 / f4 ≤ 0.10; 1.60 ≤ f1 / R1 + f4 / R8 ≤ 3.00; -14.00 ≤ f2 / R4 + f3 / R5 ≤ -5.50; 35.00° ≤ CRAmax ≤ 40.00°.

10. The imaging optical lens according to claim 9, characterized in that, The following relationship is satisfied: 1.95 ≤ f1 / R1 + f4 / R8 ≤ 2.

55.

11. The imaging optical lens according to claim 9, wherein The following relationship is satisfied: -12.00 ≤ f2 / R4 + f3 / R5 ≤ -7.

00.

12. The imaging optical lens according to claim 9, characterized in that, The following relationship is satisfied: -0.230 ≤ Sin(A1.0out14) * R14 / f7 ≤ 0.

003.

13. The imaging optical lens according to claim 9, characterized in that, The following relationship is satisfied: 1.25 ≤ (f1 + f2 + f3 + f4) / (f5 + f6 + f7) ≤ 2.

00.

14. The imaging optical lens according to claim 9, wherein, The following relationship is satisfied: -1.20 ≤ Sin(A0.8out8) * R8 / f4 ≤ 0.

10.

15. The imaging optical lens according to claim 9, wherein The on-axis thickness of the seventh lens is d13, and the following relationship is satisfied: -15.00 ≤ f7 / d13 ≤ -8.

50.

16. The imaging optical lens according to claim 15, wherein The following relationship is satisfied: -12.00 ≤ f7 / d13 ≤ -10.

00.

17. The imaging optical lens according to claim 9, wherein The following relationship is satisfied: -4.80 ≤ f7 / R14 ≤ -1.

60.

18. The imaging optical lens according to claim 17, wherein, The following relationship is satisfied: -4.00 ≤ f7 / R14 ≤ -2.

00.

19. The imaging optical lens according to claim 9, wherein, The first lens is a glass lens.

Images