Optical imaging lens

Abstract

The present application relates to the field of optical lenses, and discloses an optical imaging lens. The optical imaging lens comprises seven lenses in total, the seven lenses being sequentially arranged from an object side to an image side and comprising: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, and a seventh lens having a negative refractive power, wherein a focal length of the fourth lens is f4, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, a focal length of the seventh lens is f7, a center curvature radius of an object-side surface of the fifth lens is R9, a center curvature radius of an image-side surface of the fifth lens is R10, and the optical imaging lens satisfies the following relationship: 0.50 ≤ f4 / f5 ≤ 1.20; -7.00 ≤ R10 / R9 ≤ -1.00; and -1.60 ≤ f6 / f7 ≤ -1.10.

Description

Camera optical lens Technical Field

[0001] This application relates to the field of optical lenses, and in particular to a camera optical lens suitable for handheld terminal devices such as smartphones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Technology

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera lenses has been increasing. Due to the shrinking pixel size of image sensors and the current trend in electronic products towards high functionality and lightweight portability, miniaturized camera lenses with good image quality have become mainstream in the market. To achieve better image quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasingly diverse user needs, as the pixel area of ​​image sensors continues to shrink and system requirements for image quality continue to rise, seven-element lens structures are gradually appearing in lens designs. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, small size, and adequate aberration correction. Summary of the Invention

[0003] To address the aforementioned issues, the main objective of this application is to provide a camera optical lens that possesses excellent optical performance while meeting the design requirements of large aperture, ultra-thin design, and wide-angle capability.

[0004] To achieve the above objectives, the technical solution of this application provides a camera optical lens comprising seven lenses, which are arranged sequentially 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 positive refractive power, a fourth lens with negative refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; wherein 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 object side of the fifth lens is R9, and the central radius of curvature of the image side of the fifth lens is R10, and satisfying the following relationships: 0.50≤f4 / f5≤1.20; -7.00≤R10 / R9≤-1.00; -1.60≤f6 / f7≤-1.10.

[0005] Preferably, the focal length of the camera optical lens is f, the focal length of the first lens is f1, and the following relationship is satisfied: 0.95≤f1 / f≤1.15.

[0006] Preferably, the central radius of curvature of the object side of the fourth lens is R7, and the central radius of curvature of the image side of the fourth lens is R8, and the following relationship is satisfied: 1.20≤R7 / R8≤4.00.

[0007] Preferably, the total optical length of the camera lens is TTL, the axial thickness of the first lens is d1, the axial distance from the image side of the first lens to the object side of the second lens is d2, the axial thickness of the second lens is d3, and the following relationship is satisfied: 0.14≤(d1+d2+d3) / TTL≤0.20.

[0008] Preferably, the object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position; the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -2.72≤(R1+R2) / (R1-R2)≤-2.27; 0.05≤d1 / TTL≤0.15.

[0009] Preferably, the object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position; the focal length of the camera optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, the on-axis thickness of the second lens is d3, and the total optical length of the camera optical lens is TTL, and satisfies the following relationships: -4.17≤f2 / f≤-2.85; 3.96≤(R3+R4) / (R3-R4)≤4.90; 0.01≤d3 / TTL≤0.06.

[0010] Preferably, the object-side surface of the third lens is convex near the axis, and the image-side surface of the third lens is concave near the axis; the focal length of the camera optical lens is f, the focal length of the third lens is f3, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, the on-axis thickness of the third lens is d5, and the total optical length of the camera optical lens is TTL, and satisfies the following relationships: 4.27≤f3 / f≤5.98; -3.29≤(R5+R6) / (R5-R6)≤-1.32; 0.03≤d5 / TTL≤0.10.

[0011] Preferably, the object-side surface of the fourth lens is convex near the axis, and the image-side surface of the fourth lens is concave near the axis; the focal length of the camera optical lens is f, the central radius of curvature of the object-side surface of the fourth lens is R7, the central radius of curvature of the image-side surface of the fourth lens is R8, the axial thickness of the fourth lens is d7, and the total optical length of the camera optical lens is TTL, and satisfies the following relationships: -19.29≤f4 / f≤-5.40; 1.63≤(R7+R8) / (R7-R8)≤10.52; 0.02≤d7 / TTL≤0.07.

[0012] Preferably, the object-side surface of the fifth lens is concave near the axis, and the image-side surface of the fifth lens is concave near the axis; the focal length of the imaging optical lens is f, the on-axis thickness of the fifth lens is d9, and the total optical length of the imaging optical lens is TTL, and the following relationships are satisfied: -16.29≤f5 / f≤-4.51; -0.78≤(R9+R10) / (R9-R10)≤0.00; 0.03≤d9 / TTL≤0.09.

[0013] Preferably, the object-side surface of the sixth lens is convex near the axis, and the image-side surface of the sixth lens is concave near the axis; according to claim 1, the focal length of the camera optical lens is f, the central radius of curvature of the object-side surface of the sixth lens is R11, the central radius of curvature of the image-side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the total optical length of the camera optical lens is TTL, and satisfies the following relationships: 0.75≤f6 / f≤1.07; -1.64≤(R11+R12) / (R11-R12)≤-1.28; 0.08≤d11 / TTL≤0.15.

[0014] Preferably, the object-side surface of the seventh lens is concave near the axis, and the image-side surface of the seventh lens is concave near the axis; according to claim 1, the focal length of the camera optical lens is f, the central radius of curvature of the object-side surface of the seventh lens is R13, the central radius of curvature of the image-side surface of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the total optical length of the camera optical lens is TTL, and satisfies the following relationships: -0.74≤f7 / f≤-0.58; -0.33≤(R13+R14) / (R13-R14)≤-0.14; 0.02≤d13 / TTL≤0.09.

[0015] The beneficial effects of this application are as follows: the camera optical lens of this application has excellent optical characteristics, and has the characteristics of large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 is a schematic diagram of the structure of the camera optical lens according to the first embodiment of this application;

[0018] Figure 2 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 1;

[0019] Figure 3 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 1;

[0020] Figure 4 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 1;

[0021] Figure 5 is a schematic diagram of the structure of the camera optical lens according to the second embodiment of this application;

[0022] Figure 6 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 5;

[0023] Figure 7 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 5;

[0024] Figure 8 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 5;

[0025] Figure 9 is a schematic diagram of the structure of the camera optical lens according to the third embodiment of this application;

[0026] Figure 10 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 9;

[0027] Figure 11 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 9;

[0028] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 9;

[0029] Figure 13 is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of this application;

[0030] Figure 14 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 13;

[0031] Figure 15 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 13;

[0032] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 13;

[0033] Figure 17 is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0034] Figure 18 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 17;

[0035] Figure 19 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 17;

[0036] Figure 20 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 17. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0038] Referring to the accompanying drawings, the technical solution of this application provides a camera optical lens 10, 20, 30, and 40. Figures 1, 5, 9, and 13 show the camera optical lenses 10, 20, 30, and 40 of this application, which together comprise seven lenses. Specifically, the camera optical lenses, from the object side to the image side, are as follows: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7. An optical filter GF or other optical elements may be disposed between the seventh lens L7 and the image plane S1.

[0039] The first lens L1 is made of plastic, 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. Other materials may also be used for the lenses.

[0040] The focal length of the fourth lens is defined as f4, and the focal length of the fifth lens is defined as f5, satisfying the following relationship: 0.50≤f4 / f5≤1.20. This specifies the ratio of the focal lengths of the fourth and fifth lenses. By reasonably allocating the optical focal lengths of the system, the system can achieve better imaging quality and lower sensitivity.

[0041] The central radius of curvature of the object side of the fifth lens is defined as R9, and the central radius of curvature of the image side of the fifth lens is defined as R10, satisfying the following relationship: -7.00≤R10 / R9≤-1.00. This defines the shape of the fifth lens, which can mitigate the degree of light deflection through the lens within the conditional range, effectively correct chromatic aberration, and make the chromatic aberration |LC|≤μm.

[0042] The focal length of the sixth lens is defined as f6, and the focal length of the seventh lens is defined as f7, satisfying the following relationship: -1.60≤f6 / f7≤-1.10. This specifies the ratio of the focal lengths of the sixth and seventh lenses. By reasonably allocating the optical focal lengths of the system, the system can achieve better imaging quality and lower sensitivity.

[0043] The focal length of the camera optical lens is f, and the focal length of the first lens is f1. The following relationship is satisfied: 0.95≤f1 / f≤1.15. This specifies the ratio of the focal length of the first lens to the total focal length of the system, which can effectively balance the field curvature of the system and make the field curvature offset of the central field of view less than 0.01mm.

[0044] The central radius of curvature of the object side of the fourth lens is R7, and the central radius of curvature of the image side of the fourth lens is R8, satisfying the following relationship: 1.20≤R7 / R8≤4.00. This defines the shape of the fourth lens. Within the range of the condition, it helps to mitigate the degree of light deflection after passing through the lens and can effectively reduce aberrations.

[0045] The on-axis thickness of the first lens L1 is d1, and the on-axis distance from the image side of the first lens L1 to the object side of the second lens L2 is d2. The on-axis thickness of the second lens L2 is defined as d3, satisfying the following relationship: 0.14≤(d1+d2+d3) / TTL≤0.20. This specifies the ratio of the distance from the object side of the front end L1 to the image side of L2 to the total length of the system. Reasonably allocating the proportion of lens thickness helps to achieve ultra-thinness.

[0046] Under the above conditions, the camera optical lenses 10, 20, 30, and 40 have good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thin design. Based on the characteristics of the camera optical lenses 10, 20, 30, and 40, they are particularly suitable for mobile phone camera lens assemblies and web camera lenses composed of high-pixel CCD, CMOS, and other imaging elements.

[0047] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0048] The object-side surface of the first lens L1 is convex near the axis, and the image-side surface is concave near the axis. The first lens L1 has positive refractive power. The object-side surface and image-side surface of the first lens L1 can also be configured with other concave and convex distributions.

[0049] The center curvature radius R1 of the object side of the first lens L1 and the center curvature radius R2 of the image side of the first lens L1 satisfy the following relationship: -2.72≤(R1+R2) / (R1-R2)≤-2.27. By reasonably controlling the shape of the first lens, the first lens can effectively correct the spherical aberration of the system.

[0050] The on-axis thickness of the first lens L1 is d1, and the total optical length of the overall imaging optical lens 10 is TTL, satisfying the following relationship: 0.05≤d1 / TTL≤0.15, which is beneficial for achieving ultra-thinness.

[0051] The object-side surface of the second lens L2 is convex near the axis, and the image-side surface is concave near the axis. The second lens L2 has negative refractive power. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0052] The focal length of the second lens L2 is f2, and the focal length of the overall imaging optical lens 10 is f, satisfying the following relationship: -4.17≤f2 / f≤-2.85. By controlling the negative optical power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the optical system.

[0053] The central curvature radius R3 of the object side of the second lens L2 and the central curvature radius R4 of the image side of the second lens L2 satisfy the following relationship: 3.96≤(R3+R4) / (R3-R4)≤4.90, which defines the shape of the second lens L2. When within this range, as lenses develop towards ultra-thin and wide-angle lenses, it is beneficial to correct on-axis chromatic aberration.

[0054] The on-axis thickness of the second lens L2 is d3, and the total optical length of the overall imaging optical lens 10 is TTL, satisfying the following relationship: 0.01≤d3 / TTL≤0.06, which is beneficial for achieving ultra-thinness.

[0055] The object-side surface of the third lens L3 is convex near the axis, and the image-side surface is concave near the axis. The third lens L3 has positive refractive power. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.

[0056] The focal length of the third lens L3 is f3, and the focal length of the overall imaging optical lens 10 is f, satisfying the following relationship: 4.27≤f3 / f≤5.98. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0057] The central curvature radius of the object side of the third lens L3 is R5, and the central curvature radius of the image side of the third lens L3 is R6. The following relationship is satisfied: -3.29≤(R5+R6) / (R5-R6)≤-1.32. This can effectively control the shape of the third lens L3, which is beneficial to the shaping of the third lens L3. Within the range specified by the condition formula, it can mitigate the degree of light deflection after passing through the lens and effectively reduce aberrations.

[0058] The on-axis thickness of the third lens L3 is d5, and the total optical length of the overall imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d5 / TTL≤0.10, which is beneficial for achieving ultra-thinness.

[0059] The object-side surface of the fourth lens L4 is convex near the axis, and the image-side surface is concave near the axis. The fourth lens L4 has negative refractive power. The object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave and convex distributions.

[0060] The focal length of the fourth lens L4 is f4, and the focal length of the overall imaging optical lens 10 is f, satisfying the following relationship: -19.29≤f4 / f≤-5.40. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0061] The center curvature radius of the object side of the fourth lens L4 is R7, and the center curvature radius of the image side of the fourth lens L4 is R8, satisfying the following relationship: 1.63≤(R7+R8) / (R7-R8)≤10.52. This specifies the shape of the fourth lens L4. When within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0062] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the overall imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d7 / TTL≤0.07, which is beneficial for achieving ultra-thinness.

[0063] The object-side surface of the fifth lens L5 is concave near the axis, and the image-side surface is also concave near the axis. The fifth lens L5 has negative refractive power. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave or convex distributions.

[0064] The focal length of the fifth lens L5 is f5, and the focal length of the overall imaging optical lens 10 is f, satisfying the following relationship: -16.29≤f5 / f≤-4.51. The limitation of the fifth lens L5 can effectively make the light angle of the imaging lens smoother and reduce tolerance sensitivity.

[0065] The central curvature radius of the object side of the fifth lens L5 is R9, and the central curvature radius of the image side of the fifth lens L5 is R10, satisfying the following relationship: -0.78≤(R9+R10) / (R9-R10)≤0.00. This specifies the shape of the fifth lens L5. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0066] The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the overall imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d9 / TTL≤0.09, which is beneficial for achieving ultra-thinness.

[0067] The object-side surface of the sixth lens L6 is convex near the axis, and the image-side surface is concave near the axis. The sixth lens L6 has positive refractive power. The object-side and image-side surfaces of the sixth lens L6 can also be configured with other concave and convex distributions.

[0068] The focal length of the sixth lens L6 is f6, and the focal length of the overall imaging optical lens 10 is f, satisfying the following relationship: 0.75≤f6 / f≤1.07. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0069] The central radius of curvature of the object side of the sixth lens L6 is R11, and the central radius of curvature of the image side of the sixth lens L6 is R12, satisfying the following relationship: -1.64≤(R11+R12) / (R11-R12)≤-1.28. This specifies the shape of the sixth lens L6. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0070] The on-axis thickness of the sixth lens L6 is d11, and the total optical length of the overall imaging optical lens 10 is TTL, satisfying the following relationship: 0.08≤d11 / TTL≤0.15, which is beneficial for achieving ultra-thinness.

[0071] The object-side surface of the seventh lens L7 is concave near the axis, and the image-side surface is also concave near the axis. The seventh lens L7 has negative refractive power. The object-side surface and image-side surface of the seventh lens L7 can also be configured with other concave and convex distributions.

[0072] The focal length of the seventh lens L7 is f7, and the focal length of the overall imaging optical lens 10 is f, satisfying the following relationship: -0.74≤f7 / f≤-0.58. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0073] The central curvature radius of the object side of the seventh lens L7 is R13, and the central curvature radius of the image side of the seventh lens L7 is R14, satisfying the following relationship: -0.33≤(R13+R14) / (R13-R14)≤-0.14. This specifies the shape of the seventh lens L7. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0074] The on-axis thickness of the seventh lens L7 is d13, and the total optical length of the overall imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d13 / TTL≤0.09, which is beneficial for achieving ultra-thinness.

[0075] The image height of the 1.0 field of view of the camera optical lenses 10, 20, 30, and 40 is IH, and the total optical length of the camera optical lens 10 is TTL, and satisfies the following relationship: 1.10≤TTL / IH≤1.28, which is conducive to achieving ultra-thinness.

[0076] The field of view (FOV) of the camera optical lenses 10, 20, 30, and 40 is 80°≤FOV≤91°, thereby achieving wide-angle viewing.

[0077] The camera optical lens has aperture values ​​of 1.80≤FNO≤2.30 for apertures of 10, 20, 30, and 40, thus achieving a large aperture and good imaging performance.

[0078] The following examples will illustrate the camera optical lens of this application. The symbols used in the examples are shown below, and the units for focal length, on-axis distance, radius of curvature, central radius of curvature, and on-axis thickness are mm.

[0079] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0080] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0081] Image height IH of 1.0 field of view: The field of view height corresponding to the effective pixel of the sensor (i.e., half the diagonal length of the effective pixel area of ​​the sensor);

[0082] 1.0 Field of View (FOV): The field of view angle corresponding to the effective pixel of the sensor;

[0083] Preferably, the object-side and / or image-side surfaces of the lens may also be provided with inflection points and / or stagnation points to meet the requirements of high-quality imaging.

[0084] The technical solution of this application will be described in detail below with four implementation methods. At the same time, a comparative implementation method is provided for reference. The technical effects of this application cannot be achieved when the above conditions are not met.

[0085] (First Implementation)

[0086] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of this application.

[0087] Table 1

[0088] The meanings of each symbol are as follows.

[0089] S1: Aperture;

[0090] R: Radius of curvature at the center of the optical surface, or the central radius of curvature of the object side or image side of the lens;

[0091] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0092] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0093] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0094] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0095] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0096] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0097] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0098] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0099] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0100] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0101] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0102] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0103] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0104] R14: The central radius of curvature of the image-side surface of the seventh lens L7;

[0105] R15: Radius of curvature of the object-side surface of the optical filter GF;

[0106] R16: Radius of curvature of the image-side surface of the optical filter GF;

[0107] d: Axial thickness of the lens, axial distance between lenses;

[0108] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0109] d1: On-axis thickness of the first lens L1;

[0110] d2: The on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

[0111] d3: On-axis thickness of the second lens L2;

[0112] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0113] d5: On-axis thickness of the third lens L3;

[0114] d6: The on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

[0115] d7: On-axis thickness of the fourth lens L4;

[0116] d8: The on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0117] d9: On-axis thickness of the fifth lens L5;

[0118] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0119] d11: On-axis thickness of the sixth lens L6;

[0120] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0121] d13: On-axis thickness of the seventh lens L7;

[0122] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0123] d15: On-axis thickness of the optical filter GF;

[0124] d16: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0125] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0126] nd1: The refractive index of the d-line of the first lens L1;

[0127] nd2: The refractive index of the d-line of the second lens L2;

[0128] nd3: The refractive index of the d-line of the third lens L3;

[0129] nd4: The refractive index of the d-line of the fourth lens L4;

[0130] nd5: The refractive index of the d-line of the fifth lens L5;

[0131] nd6: The refractive index of the d-line of the sixth lens L6;

[0132] nd7: The refractive index of the d-line of the seventh lens L7;

[0133] ndg: The refractive index of the d-line of the optical filter GF;

[0134] vd: Abbe number;

[0135] v1: Abbe number of the first lens L1;

[0136] v2: Abbe number of the second lens L2;

[0137] v3: Abbe number of the third lens L3;

[0138] v4: Abbe number of the fourth lens L4;

[0139] v5: Abbe number of the fifth lens L5;

[0140] v6: Abbe number of the sixth lens L6;

[0141] v7: Abbe number of the seventh lens L7;

[0142] vg: Abbe number of the optical filter GF.

[0143] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of this application.

[0144] Table 2

[0145] For convenience, the aspherical surfaces of each lens surface are those shown in formula (1) below. However, this application is not limited to the aspherical polynomial form represented by formula (1). z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 (1)

[0146] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and a tangent plane at the vertex of the aspheric optical axis).

[0147] Figures 2 and 3 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656nm, 610nm, 555nm, 510nm, and 470nm passes through the camera optical lens 10 of the first embodiment, respectively. Figure 4 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. In Figure 4, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0148] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 2.594 mm, the image height IH of the 1.0 field of view is 5.120 mm, and the field of view FOV of the 1.0 field of view is 90.39°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0149] (Second Implementation)

[0150] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0151] Figure 5 shows the camera optical lens 20 of the second embodiment of this application.

[0152] Tables 3 and 4 show the design data of the camera optical lens 20 according to the second embodiment of this application.

[0153] Table 3

[0154] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of this application.

[0155] Table 4

[0156] Figures 6 and 7 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 20 of the second embodiment, respectively. Figure 8 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 20 of the second embodiment. In Figure 8, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0157] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 2.594 mm, the image height IH of the 1.0 field of view is 5.122 mm, and the field of view FOV of the 1.0 field of view is 81.45°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0158] (Third Implementation)

[0159] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0160] Figure 9 shows the camera optical lens 30 of the third embodiment of this application.

[0161] Tables 5 and 6 show the design data of the camera optical lens 30 according to the third embodiment of this application.

[0162] Table 5

[0163] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of this application.

[0164] Table 6

[0165] Figures 10 and 11 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 30 of the third embodiment, respectively. Figure 12 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 30 of the third embodiment. In Figure 12, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0166] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 2.594 mm, the image height IH of the 1.0 field of view is 5.044 mm, and the field of view FOV of the 1.0 field of view is 88.76°. The camera optical lens 30 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0167] (Fourth Implementation)

[0168] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0169] Figure 13 shows the camera optical lens 40 of the fourth embodiment of this application.

[0170] Tables 7 and 8 show the design data of the camera optical lens 40 according to the fourth embodiment of this application.

[0171] Table 7

[0172] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of this application.

[0173] Table 8

[0174] Figures 14 and 15 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 40 of the fourth embodiment, respectively. Figure 16 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 40 of the fourth embodiment. In Figure 16, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0175] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 2.594mm, the image height IH of the 1.0 field of view is 5.100mm, and the field of view FOV of the 1.0 field of view is 89.57°. The camera optical lens 40 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0176] Table 11, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in the conditional expressions in each of the first, second, third, and fourth implementation methods.

[0177] (Comparative Implementation Methods)

[0178] The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0179] Figure 17 shows the camera optical lens 50 of the comparative embodiment.

[0180] Tables 9 and 10 show the design data of the camera optical lens 50 of the comparative embodiment.

[0181] Table 9

[0182] Table 10 shows the aspherical data of each lens in the camera optical lens 50 of the comparative embodiment.

[0183] Table 10

[0184] Figures 18 and 19 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 50 of the comparative embodiment, respectively. Figure 20 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 50 of the comparative embodiment. In Figure 20, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0185] Table 11 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the limitation of condition 0.50≤f4 / f5≤1.20.

[0186] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 2.594mm, the full field of view image height IH is 5.120mm, and the diagonal field of view FOV is 86.60°. The camera optical lens 50 does not meet the design requirements of large aperture, wide angle, and ultra-thin design.

[0187] Table 11

[0188] Those skilled in the art will understand that the above embodiments are specific implementations of this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. A camera optical lens, characterized in that, The camera optical lens comprises seven lenses, which are arranged in the following 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 positive refractive power, a fourth lens with negative refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. Wherein, 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 object-side surface of the fifth lens is R9, and the central radius of curvature of the image-side surface of the fifth lens is R10, and the following relationship is satisfied: 0.50≤f4 / f5≤1.20; -7.00≤R10 / R9≤-1.00; -1.60≤f6 / f7≤-1.

10.

2. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, and the focal length of the first lens is f1, and they satisfy the following relationship: 0.95≤f1 / f≤1.

15.

3. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object side of the fourth lens is R7, and the central radius of curvature of the image side of the fourth lens is R8, and they satisfy the following relationship: 1.20≤R7 / R8≤4.

00.

4. The camera optical lens according to claim 1, characterized in that, The total optical length of the camera lens is TTL, the axial thickness of the first lens is d1, the axial distance from the image side of the first lens to the object side of the second lens is d2, the axial thickness of the second lens is d3, and the following relationship is satisfied: 0.14≤(d1+d2+d3) / TTL≤0.

20.

5. The camera optical lens according to claim 1, characterized in that, The object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position. The center radius of curvature of the object-side surface of the first lens is R1, the center radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -2.72≤(R1+R2) / (R1-R2)≤-2.27; 0.05≤d1 / TTL≤0.

15.

6. The camera optical lens according to claim 1, characterized in that, The object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position. The focal length of the camera optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -4.17≤f² / f≤-2.85; 3.96≤(R3+R4) / (R3-R4)≤4.90; 0.01≤d3 / TTL≤0.

06.

7. The camera optical lens according to claim 1, characterized in that, The object-side surface of the third lens is convex at the paraxial position, and the image-side surface of the third lens is concave at the paraxial position. The focal length of the camera optical lens is f, the focal length of the third lens is f3, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, the axial thickness of the third lens is d5, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 4.27≤f³ / f≤5.98; -3.29≤(R5+R6) / (R5-R6)≤-1.32; 0.03≤d5 / TTL≤0.

10.

8. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fourth lens is convex at the paraxial position, and the image-side surface of the fourth lens is concave at the paraxial position. The focal length of the camera optical lens is f, the central radius of curvature of the object side of the fourth lens is R7, the central radius of curvature of the image side of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -19.29≤f4 / f≤-5.40; 1.63≤(R7+R8) / (R7-R8)≤10.52; 0.02≤d7 / TTL≤0.

07.

9. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fifth lens is concave at the paraxial level, and the image-side surface of the fifth lens is also concave at the paraxial level. The focal length of the camera optical lens is f, the on-axis thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -16.29≤f5 / f≤-4.51; -0.78≤(R9+R10) / (R9-R10)≤0.00; 0.03≤d9 / TTL≤0.

09.

10. The camera optical lens according to claim 1, characterized in that, The object-side surface of the sixth lens is convex at the paraxial position, and the image-side surface of the sixth lens is concave at the paraxial position. The focal length of the camera optical lens is f, the central radius of curvature of the object side of the sixth lens is R11, the central radius of curvature of the image side of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.75≤f6 / f≤1.07; -1.64≤(R11+R12) / (R11-R12)≤-1.28; 0.08≤d11 / TTL≤0.

15.

11. The camera optical lens according to claim 1, characterized in that, The object-side surface of the seventh lens is concave at the paraxial level, and the image-side surface of the seventh lens is also concave at the paraxial level. The focal length of the camera optical lens is f, the central radius of curvature of the object side of the seventh lens is R13, the central radius of curvature of the image side of the seventh lens is R14, the on-axis thickness of the seventh lens is d13, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -0.74≤f7 / f≤-0.58; -0.33≤(R13+R14) / (R13-R14)≤-0.14; 0.02≤d13 / TTL≤0.09.

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