Photographing optical lens

Abstract

The present invention relates to the field of optical lenses. Disclosed is a photographing optical lens. The photographing optical lens comprises seven lenses; from an object side to an image side, the seven lenses successively include: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; and the following relational expressions are satisfied: 0.20≤H0.6r9 / IH≤0.30; 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00; and -6.00≤(H0.6r14 / d13)*(f7 / f)≤-3.00.

Description

Camera optical lens TECHNICAL FIELD

[0001] The present application relates to the field of optical lens, in particular to a camera optical lens suitable for smart phones, digital cameras and other portable terminal devices, as well as surveillance cameras, PC lenses, vehicle-mounted lenses and other camera devices. BACKGROUND

[0002] In recent years, with the rise of various smart devices, the demand for small camera optical lenses is increasing, and due to the reduction of the pixel size of the photosensitive device, combined with the current trend of electronic products being light and thin, the small camera optical lens with good imaging quality has become the mainstream in the market. In order to obtain better imaging quality, a multi-piece lens structure is often used. With the development of technology and the increasing of user's diversified needs, under the condition that the pixel area of the photosensitive device is continuously reduced and the requirement of the system for imaging quality is continuously improved, a seven-piece lens structure gradually appears in the lens design. There is an urgent need for a wide-angle camera optical lens with excellent imaging performance, low sensitivity, good processability, miniaturization and fully corrected aberration.

[0003] SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a camera optical lens which has excellent imaging performance while meeting the design requirements of wide-angle, low sensitivity, good processability, miniaturization and fully corrected aberration.

[0005] To achieve the above purpose, the technical scheme of the present application provides a camera optical lens, which comprises seven lenses, and the seven lenses are arranged in order from the object side to the image side as follows: 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.

[0006] The object side surface of the first lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the second lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the third lens is concave at the near axis, and the image side surface is concave at the near axis; the object side surface of the fourth lens is convex at the near axis, and the image side surface is convex at the near axis; the object side surface of the fifth lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the sixth lens is convex at the near axis, and the image side surface is convex at the near axis; the object side surface of the seventh lens is convex at the near axis, and the image side surface is concave at the near axis.

[0007] Wherein, the focal length of the photographing optical lens is f, 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 seventh lens is f7, the central curvature radius of the object side of the second lens at the near axis is R3, the central curvature radius of the image side of the second lens at the near axis is R4, the central curvature radius of the object side of the fifth lens at the near axis is R9, the central curvature radius of the image side of the fifth lens at the near axis is R10, the on-axis thickness of the fifth lens is d9, the on-axis thickness of the seventh lens is d13, the radial height of the intersection point of the chief ray of the 0.6 field of view of the photographing optical lens and the object side of the first lens is H0.6r1, the radial height of the intersection point of the chief ray of the 0.6 field of view of the photographing optical lens and the object side of the fifth lens is H0.6r9, the radial height of the intersection point of the chief ray of the 0.6 field of view of the photographing optical lens and the image side of the seventh lens is H0.6r14, the image height of the 1.0 field of view of the photographing optical lens is IH, the half of the field of view angle of the 1.0 field of view of the photographing optical lens is semi-FOV, and the following relations are satisfied:

[0008] 5.00≤(f4-f5) / f1≤12.00;

[0009] 2.10≤(R3+R4) / f≤3.50;

[0010] 20.00≤(R9+R10) / d9≤40.00;

[0011] -9.00≤(f2-f3) / f≤-3.00;

[0012] 0.20≤H0.6r9 / IH≤0.30;

[0013] 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00;

[0014] -6.00≤(H0.6r14 / d13)*(f7 / f)≤-3.00.

[0015] Preferably, the following relation is satisfied: 2.10≤(R3+R4) / f≤2.90.

[0016] Preferably, the following relation is satisfied: -7.70≤(f2-f3) / f≤-3.00.

[0017] Preferably, the following relation is satisfied: 19.00≤f1 / H0.6r1*tan(semi-FOV)≤25.50.

[0018] Preferably, the following relationship is satisfied: -5.30 ≤ (H0.6r14 / d13)*(f7 / f) ≤ -3.70.

[0019] Preferably, the focal length of the sixth lens is f6, and the following relationship is satisfied: -1.80 ≤ f6 / f7 ≤ -0.90.

[0020] Preferably, the following relationship is satisfied: -1.55 ≤ f6 / f7 ≤ -1.10.

[0021] Preferably, the first lens is made of glass.

[0022] The technical scheme of the present application also provides a camera optical lens, which comprises seven lenses in sequence 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.

[0023] The object side surface of the first lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the second lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the third lens is concave at the near axis, and the image side surface is concave at the near axis; the object side surface of the fourth lens is convex at the near axis, and the image side surface is convex at the near axis; the object side surface of the fifth lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the sixth lens is convex at the near axis, and the image side surface is convex at the near axis; and the object side surface of the seventh lens is convex at the near axis, and the image side surface is concave at the near axis.

[0024] Wherein, the focal length of the photographing optical lens is f, the focal length of the first lens is f1, the focal length of the fifth lens is f5, the focal length of the seventh lens is f7, the central curvature radius of the object side of the first lens at the near axis is R1, the central curvature radius of the image side of the first lens at the near axis is R2, the central curvature radius of the object side of the third lens at the near axis is R5, the central curvature radius of the image side of the third lens at the near axis is R6, the on-axis distance from the image side of the second lens to the object side of the third lens is d4, the on-axis thickness of the third lens is d5, the on-axis distance from the image side of the third lens to the object side of the fourth lens is d6, the on-axis thickness of the seventh lens is d13, the radial height of the intersection point of the chief ray of the 0.6 field of view of the photographing optical lens and the object side of the first lens is H0.6r1, the radial height of the intersection point of the chief ray of the 0.6 field of view of the photographing optical lens and the object side of the fifth lens is H0.6r9, the radial height of the intersection point of the chief ray of the 0.6 field of view of the photographing optical lens and the image side of the seventh lens is H0.6r14, the image height of the 1.0 field of view of the photographing optical lens is IH, the half of the field of view angle of the 1.0 field of view of the photographing optical lens is semi-FOV, and the following relations are satisfied:

[0025] 0.20≤H0.6r9 / IH≤0.30;

[0026] 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00;

[0027] -6.00≤(H0.6r14 / d13)*(f7 / f)≤-3.00;

[0028] 0.21≤R1 / R2≤0.42;

[0029] 0.30≤d5 / (d4+d6)≤0.55;

[0030] -3.45≤R5 / R6≤-0.20;

[0031] -11.60≤f5 / f≤-3.00.

[0032] Preferably, the following relation is satisfied: 0.25≤R1 / R2≤0.35.

[0033] Preferably, the following relation is satisfied: 0.35≤d5 / (d4+d6)≤0.45.

[0034] Preferably, the following relation is satisfied: -2.85≤R5 / R6≤-0.20.

[0035] Preferably, the following relationship is satisfied: -10.00 ≤ f5 / f ≤ -3.50.

[0036] Preferably, the following relationship is satisfied: 19.00 ≤ f1 / H0.6r1*tan(semi-FOV) ≤ 25.50.

[0037] Preferably, the following relationship is satisfied: -5.30 ≤ (H0.6r14 / d13)*(f7 / f) ≤ -3.70.

[0038] Preferably, the following relationship is satisfied: 1.00 ≤ f1 / f ≤ 1.40.

[0039] Preferably, the following relationship is satisfied: 1.05 ≤ f1 / f ≤ 1.25.

[0040] Preferably, the on-axis thickness of the first lens is d1, and the total track length of the camera optical lens is TTL, and the following relationship is satisfied: 0.09 ≤ d1 / TTL ≤ 0.16.

[0041] Preferably, the following relationship is satisfied: 0.10 ≤ d1 / TTL ≤ 0.14.

[0042] Preferably, the first lens is made of glass.

[0043] The camera optical lens according to the present application has excellent imaging performance, and satisfies the design requirements of wide-angle, low sensitivity, good processability, miniaturization, and sufficient correction of aberration, and is particularly suitable for mobile phone camera lens assemblies, WEB camera lenses, and vehicle-mounted lenses composed of high-pixel CCD, CMOS, and other camera elements. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0045] FIG. 1 is a structural schematic diagram of a camera optical lens according to a first embodiment of the present application;

[0046] FIG. 2 is an axial aberration schematic diagram of the camera optical lens shown in FIG. 1;

[0047] FIG. 3 is a magnification chromatic aberration schematic diagram of the camera optical lens shown in FIG. 1;

[0048] FIG. 4 is a field curvature and distortion schematic diagram of the camera optical lens shown in FIG. 1;

[0049] Fig. 5 is a schematic diagram of the structure of a camera optical lens according to a second embodiment of the present application;

[0050] Fig. 6 is a schematic diagram of the axial aberration of the camera optical lens shown in Fig. 5;

[0051] Fig. 7 is a schematic diagram of the lateral chromatic aberration of the camera optical lens shown in Fig. 5;

[0052] Fig. 8 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Fig. 5;

[0053] Fig. 9 is a schematic diagram of the structure of a camera optical lens according to a third embodiment of the present application;

[0054] Fig. 10 is a schematic diagram of the axial aberration of the camera optical lens shown in Fig. 9;

[0055] Fig. 11 is a schematic diagram of the lateral chromatic aberration of the camera optical lens shown in Fig. 9;

[0056] Fig. 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Fig. 9;

[0057] Fig. 13 is a schematic diagram of the structure of a camera optical lens according to a fourth embodiment of the present application;

[0058] Fig. 14 is a schematic diagram of the axial aberration of the camera optical lens shown in Fig. 13;

[0059] Fig. 15 is a schematic diagram of the lateral chromatic aberration of the camera optical lens shown in Fig. 13;

[0060] Fig. 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Fig. 13. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be realized even without these technical details and based on various changes and modifications of the following embodiments.

[0062] With reference to Figs. 1-16, the technical scheme of the present application provides a camera optical lens 10, 20, 30, 40. Figs. 1, 5, 9, 13 show the camera optical lens 10, 20, 30, 40 of the present application, which comprises seven lenses. Specifically, the camera optical lens, from the object side to the image side, comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as an optical filter GF can be arranged between the seventh lens L7 and the image plane Si.

[0063] The first lens L1 is made of glass, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic. The combination of glass and resin lenses can reduce chromatic aberration and improve the performance of the camera optical lens. Each lens can also be made of other materials.

[0064] 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 aspherical surfaces.

[0065] 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 positive refractive power. The object side and the image side of the first lens L1 can also be arranged in other concave and convex distribution conditions.

[0066] 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 first lens L2 has negative refractive power. The object side and the image side of the first lens L2 can also be arranged in other concave and convex distribution conditions.

[0067] 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 negative refractive power. The object side and the image side of the third lens L3 can also be arranged in other concave and convex distribution conditions.

[0068] 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 positive refractive power. The object side and the image side of the fourth lens L4 can also be arranged in other concave and convex distribution conditions.

[0069] 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 negative refractive power. The object side and the image side of the fifth lens L5 can also be arranged in other concave and convex distribution conditions.

[0070] The object side surface of the sixth lens L6 is convex at the near-axial portion, the image side surface of the sixth lens L6 is convex at the near-axial portion, and the sixth lens L6 has positive refractive power. The object side surface and the image side surface of the sixth lens L6 can also be provided with other concave-convex distribution.

[0071] The object side surface of the seventh lens L7 is convex at the near-axial portion, the image side surface of the seventh lens L7 is concave at the near-axial portion, and the seventh lens L7 has negative refractive power. The object side surface and the image side surface of the seventh lens L7 can also be provided with other concave-convex distribution.

[0072] The focal length of the first lens is defined as f1, the focal length of the fourth lens is defined as f4, and the focal length of the fifth lens is defined as f5, and the following relationship is satisfied: 5.00≤(f4-f5) / f1≤12.00. Within the range of the relationship, the refractive power of the photographing optical lens is reasonably distributed, the photographing optical lens has good imaging quality, and the sensitivity of the photographing optical lens is effectively reduced.

[0073] The central curvature radius of the object side surface of the second lens at the near-axial portion is defined as R3, the central curvature radius of the image side surface of the second lens at the near-axial portion is defined as R4, and the focal length of the photographing optical lens is defined as f, and the following relationship is satisfied: 2.10≤(R3+R4) / f≤3.50. Within the range of the relationship, the ratio of the sum of the curvature radii of the object side surface and the image side surface of the second lens to the total effective focal length of the system is reasonably controlled, the third-order coma of the system is controlled within a reasonable range, and the amount of coma generated by the front lens of the optical imaging system is balanced, so that the system has good imaging quality. Preferably, 2.10≤(R3+R4) / f≤2.90.

[0074] The central curvature radius of the object side surface of the fifth lens at the near-axial portion is defined as R9, the central curvature radius of the image side surface of the fifth lens at the near-axial portion is defined as R10, and the on-axis thickness of the fifth lens is defined as d9, and the following relationship is satisfied: 20.00≤(R9+R10) / d9≤40.00. Within the range of the relationship, the shape of the fifth lens is reasonably designed, the turning angle of the light rays at the fifth lens is optimized, and wide-angle is achieved.

[0075] The focal length of the photographing optical lens is defined as f, the focal length of the second lens is defined as f2, and the focal length of the third lens is defined as f3, and the following relationship is satisfied: -9.00≤(f2-f3) / f≤-3.00. Within the range of the relationship, the sensitivity of the eccentricity and the thickness of the second lens is reduced, and the processing performance of the lens is improved. Preferably, -7.70≤(f2-f3) / f≤-3.00.

[0076] The radial height of the intersection of the main ray of the 0.6 field of view of the camera optical lens and the object side of the fifth lens is defined as H0.6r9, and the image height of the 1.0 field of view of the camera optical lens is defined as IH, which satisfies the following relationship: 0.20≤H0.6r9 / IH≤0.30. Within the range of the relationship, the ratio of the radial height (i.e., the vertical distance to the optical axis) of the intersection of the main ray of the 0.6 field of view and the object side of the fifth lens to the image height is reasonably controlled, and the light has a reasonable deflection angle from the fourth lens to the fifth lens, which is conducive to achieving a wide-angle camera optical lens.

[0077] The focal length of the first lens is defined as f1, the radial height of the intersection of the principal ray of the 0.6 field of view of the camera optical lens and the object side of the first lens is defined as H0.6r1, and half of the field of view angle of the 1.0 field of view of the camera optical lens is defined as semi-FOV, satisfying the following relationship: 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00. Within the range of the relationship, the relationship between the radial height of the intersection of the principal ray of the 0.6 field of view and the object side of the first lens (i.e., the vertical distance to the optical axis) and the focal length and half field of view angle of the first lens is reasonably controlled. The object side of the first lens has an appropriate curvature, which is conducive to achieving wide-angle. Preferably, 19.00≤f1 / H0.6r1*tan(semi-FOV)≤25.50.

[0078] The focal length of the camera optical lens is defined as f, the focal length of the seventh lens is defined as f7, the axial thickness of the seventh lens is defined as d13, and the radial height of the intersection of the principal ray of the 0.6 field of view of the camera optical lens and the image side surface of the seventh lens is defined as H0.6r14, satisfying the following relationship: -6.00≤(H0.6r14 / d13)*(f7 / f)≤-3.00. Within the range of the relationship, reasonably controlling the relationship between the radial height of the intersection of the principal ray of the 0.6 field of view and the image side surface of the seventh lens and the axial thickness, focal length, and overall focal length of the seventh lens is beneficial to further increasing the field of view angle and improving image quality at the last lens. Preferably, -5.30≤(H0.6r14 / d13)*(f7 / f)≤-3.70.

[0079] The focal length of the sixth lens element is defined as f6, and the focal length of the seventh lens element is defined as f7, satisfying the following relationship: -1.80 ≤ f6 / f7 ≤ -0.90. Within this range, the refractive power of the sixth and seventh lenses can be adjusted, which helps to reduce volume and correct aberrations. Preferably, -1.55 ≤ f6 / f7 ≤ -1.10.

[0080] The central curvature radius of the object side surface of the first lens at the paraxial region is defined as R1, and the central curvature radius of the image side surface of the first lens at the paraxial region is defined as R2, and the following relationship is satisfied: 0.21≤R1 / R2≤0.42. Within the range of the relationship, the ratio of the curvature radius of the object side surface and the image side surface of the first lens is controlled, the surface shape of the first lens is adjusted, and the light path direction is adjusted to form a wide-angle configuration. Preferably, 0.25≤R1 / R2≤0.35.

[0081] The on-axis distance from the image side surface of the second lens to the object side surface of the third lens is defined as d4, the on-axis thickness of the third lens is defined as d5, and the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is defined as d6, and the following relationship is satisfied: 0.30≤d5 / (d4+d6)≤0.55. Within the range of the relationship, the ratio of the on-axis thickness of the third lens and the sum of the air gaps before and after the third lens is controlled, the light path at the third lens is adjusted, the field of view is increased without affecting the image quality. Preferably, 0.35≤d5 / (d4+d6)≤0.45.

[0082] The central curvature radius of the object side surface of the third lens at the paraxial region is defined as R5, and the central curvature radius of the image side surface of the third lens at the paraxial region is defined as R6, and the following relationship is satisfied: -3.45≤R5 / R6≤-0.20. Within the range of the relationship, the surface shape and refractive power of the third lens are adjusted, and the aberration is corrected and the volume is compressed. Preferably, -2.85≤R5 / R6≤-0.20.

[0083] The focal length of the camera optical lens is defined as f, and the focal length of the fifth lens is defined as f5, and the following relationship is satisfied: -11.60≤f5 / f≤-3.00. Within the range of the relationship, the optical power is effectively and reasonably distributed to meet the design requirements of the wide-angle system. Preferably, -10.00≤f5 / f≤-3.50.

[0084] The focal length of the camera optical lens is defined as f, and the focal length of the first lens is defined as f1, and the following relationship is satisfied: 1.00≤f1 / f≤1.40. Within the range of the relationship, the optical power is effectively and reasonably distributed to meet the design requirements of the wide-angle system. Preferably, 1.05≤f1 / f≤1.25.

[0085] The on-axis thickness of the first lens is defined as d1, and the total optical length of the camera optical lens is defined as TTL, and the following relationship is satisfied: 0.09≤d1 / TTL≤0.16. Within the range of the relationship, it is beneficial to achieve ultra-thin. Preferably, 0.10≤d1 / TTL≤0.14.

[0086] Compared with the prior art, the camera optical lens provided by the present application has good imaging quality and effectively reduces the sensitivity of the camera optical lens by configuring 5.00≤(f4-f5) / f1≤12.00; 2.10≤(R3+R4) / f≤3.50; 20.00≤(R9+R10) / d9≤40.00; -9.00≤(f2-f3) / f≤-3.00; 0.20≤H0.6r9 / IH≤0.30; 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00; -6.00≤(H0.6r14 / d13)*(f7 / f)≤-3.00, which is conducive to balancing the amount of coma generated by the front lens of the optical imaging system, so that the system has good imaging quality, is conducive to wide-angle, reduces the sensitivity of the lens to decentration and thickness, improves the processing performance of the lens, the light rays have a reasonable folding angle from the fourth lens to the fifth lens, which is conducive to the wide-angle of the camera optical lens, the first lens has a proper curvature on the object side, which is conducive to the wide-angle, and the field of view is further increased at the last lens and the image quality is improved.

[0087] In addition, compared with the prior art, the present application can also realize wide-angle by configuring 0.20≤H0.6r9 / IH≤0.30; 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00; -6.00≤(H0.6r14 / d13)*(f7 / f)≤-3.00; 0.21≤R1 / R2≤0.42; 0.30≤d5 / (d4+d6)≤0.55; -3.45≤R5 / R6≤-0.20; -11.60≤f5 / f≤-3.00, which is conducive to the wide-angle of the camera optical lens, the first lens has a proper curvature on the object side, which is conducive to the wide-angle, the field of view is further increased at the last lens and the image quality is improved, the direction of the light rays is reasonably adjusted to form a wide-angle configuration, the optical path of the light rays at the third lens is adjusted, the field of view is increased without affecting the image quality, the aberration is corrected and the volume is compressed, the optical power is effectively and reasonably distributed, and the design requirements of the wide-angle system are met.

[0088] The camera optical lens of the present application will be described below by examples. The symbols recorded in each example are as follows. The units of focal length, on-axis distance, central curvature radius and on-axis thickness are mm.

[0089] TTL: total optical length (on-axis distance from the object side of the first lens L1 to the image plane Si), unit: mm;

[0090] F-number FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0091] Next, the technical solutions of the present application are specifically described in four embodiments.

[0092] (First embodiment)

[0093] Table 1 and Table 2 show the design data of the camera optical lens 10 of the first embodiment of the present application.

[0094]

Table 1

[0095] Wherein, the meanings of each symbol are as follows.

[0096] S1: aperture;

[0097] R: radius of curvature at the center of the optical surface;

[0098] R1: central radius of curvature of the object side surface of the first lens L1 at the paraxial region;

[0099] R2: central radius of curvature of the image side surface of the first lens L1 at the paraxial region;

[0100] R3: central radius of curvature of the object side surface of the second lens L2 at the paraxial region;

[0101] R4: central radius of curvature of the image side surface of the second lens L2 at the paraxial region;

[0102] R5: central radius of curvature of the object side surface of the third lens L3 at the paraxial region;

[0103] R6: central radius of curvature of the image side surface of the third lens L3 at the paraxial region;

[0104] R7: central radius of curvature of the object side surface of the fourth lens L4 at the paraxial region;

[0105] R8: central radius of curvature of the image side surface of the fourth lens L4 at the paraxial region;

[0106] R9: central radius of curvature of the object side surface of the fifth lens L5 at the paraxial region;

[0107] R10: central radius of curvature of the image side surface of the fifth lens L5 at the paraxial region;

[0108] R11: central radius of curvature of the object side surface of the sixth lens L6 at the paraxial region;

[0109] R12: central radius of curvature of the image side surface of the sixth lens L6 at the paraxial region;

[0110] R13: central radius of curvature of the object side surface of the seventh lens L7 at the paraxial region;

[0111] R14: central radius of curvature of the image side surface of the seventh lens L7 at the paraxial region;

[0112] R15: central radius of curvature of the object side surface of the optical filter GF at the paraxial region;

[0113] R16: central radius of curvature of the image side surface of the optical filter GF at the paraxial region;

[0114] d: on-axis thickness of the lens, on-axis distance between the lenses;

[0115] d0: on-axis distance from the stop S1 to the object side surface of the first lens L1;

[0116] d1: on-axis thickness of the first lens L1;

[0117] d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0118] d3: on-axis thickness of the second lens L2;

[0119] d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0120] d5: on-axis thickness of the third lens L3;

[0121] d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0122] d7: on-axis thickness of the fourth lens L4;

[0123] d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0124] d9: on-axis thickness of the fifth lens L5;

[0125] d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0126] d11: on-axis thickness of the sixth lens L6;

[0127] d12: on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

[0128] d13: on-axis thickness of the seventh lens L7;

[0129] d14: on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

[0130] d15: on-axis thickness of the optical filter GF;

[0131] d16: on-axis distance from the image side surface of the optical filter GF to the image plane Si;

[0132] nd: refractive index of d line (d line is green light having a wavelength of 550 nm);

[0133] nd1: refractive index of d line of the first lens L1;

[0134] nd2: refractive index of d line of the second lens L2;

[0135] nd3: refractive index of d line of the third lens L3;

[0136] nd4: refractive index of d line of the fourth lens L4;

[0137] nd5: refractive index of d line of the fifth lens L5;

[0138] nd6: refractive index of d line of the sixth lens L6;

[0139] nd7: refractive index of d line of the seventh lens L7;

[0140] ndg: refractive index of d line of the optical filter GF;

[0141] vd: Abbe number;

[0142] v1: Abbe number of the first lens L1;

[0143] v2: Abbe number of the second lens L2;

[0144] v3: Abbe number of the third lens L3;

[0145] v4: Abbe number of the fourth lens L4;

[0146] v5: Abbe number of the fifth lens L5;

[0147] v6: Abbe number of the sixth lens L6;

[0148] v7: Abbe number of the seventh lens L7;

[0149] vg: Abbe number of the optical filter GF.

[0150] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.

[0151]

Table 2

[0152] For convenience, the aspherical surface of each lens surface uses the aspherical surface shown in the following formula (1). However, the present application is not limited to the aspherical polynomial form represented by the formula (1). z = (cr 2 ) / {1 + [1 - (k + 1)(c 2 r2 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A 16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0153] wherein k is a conic constant, 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 of a point on the aspherical curve from the optical axis, and z is the aspherical depth (the perpendicular distance between a point on the aspherical curve at a distance r from the optical axis and a tangent plane tangent to the vertex of the aspherical surface on the optical axis).

[0154] FIG. 2, FIG. 3 respectively show the axial aberration and the lateral chromatic aberrion of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the camera optical lens 10 of the first embodiment. FIG. 4 shows the field curvature and distortion of light with a wavelength of 546 nm after passing through the camera optical lens 10 of the first embodiment, wherein the field curvature S of FIG. 4 is the sagittal field curvature, and T is the tangential field curvature.

[0155] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 4.868 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) angle of view FOV in the diagonal direction is 84.97°, the MIC field image height IH is 8.290 mm, and the MIC field angle of view FOV in the diagonal direction is 87.18°. The camera optical lens 10 meets the design requirements of wide-angle, low sensitivity, good processability, miniaturization, and sufficient correction of aberration, and has excellent imaging performance.

[0156] It can be understood that the 1.0 field image height refers to half the diagonal length of the effective pixel area of the sensor; the MIC field image height refers to a field height that is expanded outward than the 1.0 field image height for preventing assembly deviation; the 1.0 field angle of view in the diagonal direction refers to the field angle corresponding to the effective pixel area of the sensor; and the MIC field angle of view in the diagonal direction refers to the field angle corresponding to the MIC field image height.​

[0157] (Second Embodiment)

[0158] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0159] Fig. 5 shows the imaging optical lens 20 of the second embodiment of the present application.

[0160] Tables 3 and 4 show the design data of the imaging optical lens 20 of the second embodiment of the present application.

[0161] [Table 3]

[0162] Table 4 shows the aspheric surface data of each lens in the imaging optical lens 20 of the second embodiment of the present application.

[0163] [Table 4]

[0164] Figs. 6 and 7 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 20 of the second embodiment. Fig. 8 shows the field curvature and the distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20 of the second embodiment. The field curvature S of Fig. 8 is the sagittal field curvature, and the field curvature T is the tangential field curvature.

[0165] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 4.811 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) angle of view FOV in the diagonal direction is 84.55°, the MIC field image height IH is 8.150 mm, the MIC field angle of view FOV in the diagonal direction is 85.83°, the imaging optical lens 20 satisfies the design requirements of wide-angle, low sensitivity, good processability, miniaturization, and sufficient correction of aberration, and has excellent imaging performance.

[0166] (Third Embodiment)

[0167] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0168] Fig. 9 shows the imaging optical lens 30 of the third embodiment of the present application.

[0169] Tables 5 and 6 show the design data of the imaging optical lens 30 of the third embodiment of the present application.

[0170] [Table 5]

[0171] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 of the third embodiment of the present application.

[0172]

Table 6

[0173] Fig. 10, Fig. 11 respectively show axial aberration and magnification chromatic aberration diagrams 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. Fig. 12 shows field curvature and distortion diagrams of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment. The field curvature S of Fig. 12 is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0174] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 4.844 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) angle of view FOV in the diagonal direction is 84.23°, the MIC field image height IH is 8.150 mm, and the MIC field angle of view FOV in the diagonal direction is 85.45°. The imaging optical lens 30 satisfies the design requirements of wide-angle, low sensitivity, good processability, miniaturization, and sufficient correction of aberration, and has excellent imaging performance.

[0175] (Fourth Embodiment)

[0176] The symbol meanings of the fourth embodiment are the same as those of the first embodiment.

[0177] Fig. 13 shows the imaging optical lens 40 of the fourth embodiment of the present application.

[0178] Table 7, Table 8 show the design data of the imaging optical lens 40 of the fourth embodiment of the present application.

[0179]

Table 7

[0180] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 of the fourth embodiment of the present application.

[0181]

Table 8

[0182] Fig. 14, Fig. 15 respectively show axial chromatic aberration and magnification chromatic aberration diagrams of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the photographing optical lens 40 of the fourth embodiment. Fig. 16 shows field curvature and distortion diagrams of light with a wavelength of 546 nm after passing through the photographing optical lens 40 of the fourth embodiment. The field curvature S of Fig. 16 is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0183] In the present embodiment, the entrance pupil diameter ENPD of the photographing optical lens 40 is 4.826 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) angle of view FOV in the diagonal direction is 84.58°, the MIC field image height IH is 8.150 mm, the MIC field angle of view FOV in the diagonal direction is 85.93°, the photographing optical lens 40 meets the design requirements of wide-angle, low sensitivity, good processability, miniaturization, and sufficient correction of aberration, and has excellent imaging performance.

[0184] Table 9 shows the values corresponding to the parameters specified in the various numerical and conditional expressions in each of the first, second, third and fourth embodiments.

[0185]

Table 9

[0186] It can be understood by those skilled in the art that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A camera optical lens characterized in that, The camera optical lens comprises seven lenses in sequence 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 near axis, and the image side surface is concave at the near axis; the object side surface of the second lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the third lens is concave at the near axis, and the image side surface is concave at the near axis; the object side surface of the fourth lens is convex at the near axis, and the image side surface is convex at the near axis; the object side surface of the fifth lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the sixth lens is convex at the near axis, and the image side surface is convex at the near axis; and the object side surface of the seventh lens is convex at the near axis, and the image side surface is concave at the near axis. Wherein, the focal length of the camera optical lens is f, 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 seventh lens is f7, the central curvature radius of the object side surface of the second lens at the near axis is R3, the central curvature radius of the image side surface of the second lens at the near axis is R4, the central curvature radius of the object side surface of the fifth lens at the near axis is R9, the central curvature radius of the image side surface of the fifth lens at the near axis is R10, the on-axis thickness of the fifth lens is d9, the on-axis thickness of the seventh lens is d13, the radial height of the intersection point of the chief ray of the 0.6 field of view of the camera optical lens and the object side surface of the first lens is H0.6r1, the radial height of the intersection point of the chief ray of the 0.6 field of view of the camera optical lens and the object side surface of the fifth lens is H0.6r9, the radial height of the intersection point of the chief ray of the 0.6 field of view of the camera optical lens and the image side surface of the seventh lens is H0.6r14, the image height of the 1.0 field of view of the camera optical lens is IH, half of the field of view angle of the 1.0 field of view of the camera optical lens is semi-FOV, and the following relationships are satisfied: 5.00≤(f4-f5) / f1≤12.00; 2.10≤(R3+R4) / f≤3.50; 20.00≤(R9+R10) / d9≤40.00; -9.00≤(f2-f3) / f≤-3.00; 0.20≤H0.6r9 / IH≤0.30; 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00; -6.00≤(H0.6r14 / d13)*(f7 / f)≤-3.

00.

2. The camera optical lens according to claim 1, wherein, The following relationship is satisfied: 2.10≤(R3+R4) / f≤2.

90.

3. The camera optical lens according to claim 1, wherein, The following relationship is satisfied: -7.70≤(f2-f3) / f≤-3.

00.

4. The camera optical lens according to claim 1, characterized in that, satisfying the following relationship: 19.00 ≤ f1 / H0.6r1*tan(semi-FOV) ≤ 25.

50.

5. The camera optical lens according to claim 1, wherein, satisfying the following relationship: -5.30 ≤ (H0.6r14 / d13)*(f7 / f) ≤ -3.

70.

6. The camera optical lens according to claim 1, characterized in that, The focal length of the sixth lens is f6, satisfying the following relationship: -1.80 ≤ f6 / f7 ≤ -0.

90.

7. The camera optical lens according to claim 6, characterized in that, satisfying the following relationship: -1.55 ≤ f6 / f7 ≤ -1.

10.

8. The camera optical lens according to claim 1, characterized in that, The first lens is made of glass.

9. A camera optical lens characterized in that, The imaging optical lens comprises seven lenses 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 near axis, and the image side surface is concave at the near axis; the object side surface of the second lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the third lens is concave at the near axis, and the image side surface is concave at the near axis; the object side surface of the fourth lens is convex at the near axis, and the image side surface is convex at the near axis; the object side surface of the fifth lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the sixth lens is convex at the near axis, and the image side surface is convex at the near axis; the object side surface of the seventh lens is convex at the near axis, and the image side surface is concave at the near axis. Wherein, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the fifth lens is f5, the focal length of the seventh lens is f7, the central curvature radius of the object side surface of the first lens at the near axis is R1, the central curvature radius of the image side surface of the first lens at the near axis is R2, the central curvature radius of the object side surface of the third lens at the near axis is R5, the central curvature radius of the image side surface of the third lens at the near axis is R6, the on-axis distance from the image side surface of the second lens to the object side surface of the third lens is d4, the on-axis thickness of the third lens is d5, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the on-axis thickness of the seventh lens is d13, the radial height of the intersection point of the chief ray of the 0.6 field of view of the imaging optical lens and the object side surface of the first lens is H0.6r1, the radial height of the intersection point of the chief ray of the 0.6 field of view of the imaging optical lens and the object side surface of the fifth lens is H0.6r9, the radial height of the intersection point of the chief ray of the 0.6 field of view of the imaging optical lens and the image side surface of the seventh lens is H0.6r14, the image height of the 1.0 field of view of the imaging optical lens is IH, half of the field of view angle of the 1.0 field of view of the imaging optical lens is semi-FOV, and the following relationships are satisfied: 0.20 ≤ H0.6r9 / IH ≤ 0.30; 16.00 ≤ f1 / H0.6r1*tan(semi-FOV) ≤ 30.00; -6.00 = (H0.6r14 / d13)*(f7 / f) = -3.00; 0.21 = R1 / R2 = 0.42; 0.30 = d5 / (d4+d6) = 0.55; -3.45 = R5 / R6 = -0.20; -11.60 = f5 / f = -3.

00.

10. The camera optical lens according to claim 9, characterized in that, 0.25 = R1 / R2 = 0.

35.

11. The camera optical lens according to claim 9, characterized in that, 0.35 = d5 / (d4+d6) = 0.

45.

12. The camera optical lens according to claim 9, characterized in that, -2.85 = R5 / R6 = -0.

20.

13. The camera optical lens according to claim 9, characterized in that, -10.00 = f5 / f = -3.

50.

14. The camera optical lens according to claim 9, characterized in that, 19.00 = f1 / H0.6r1*tan(semi-FOV) = 25.

50.

15. The camera optical lens according to claim 9, characterized in that, -5.30 = (H0.6r14 / d13)*(f7 / f) = -3.

70.

16. The camera optical lens according to claim 9, characterized in that, 1.00 = f1 / f = 1.

40.

17. The camera optical lens according to claim 16, characterized in that, 1.05 = f1 / f = 1.

25.

18. The camera optical lens according to claim 9, characterized in that, The on-axis thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.09 = d1 / TTL = 0.

16.

19. The camera optical lens according to claim 18, characterized in that 0.10 = d1 / TTL = 0.

14.

20. The camera optical lens according to claim 9, characterized in that, The first lens is made of glass.

Images