Imaging optical lens

Abstract

An imaging optical lens (10), comprising a total of seven lenses, which are arranged in sequence from an object side to an image side as follows: a first lens (L1) having a positive refractive power, a second lens (L2) having a negative refractive power, a third lens (L3) having a positive refractive power, a fourth lens (L4) having a negative refractive power, a fifth lens (L5), a sixth lens (L6) having a positive refractive power, and a seventh lens (L7) having a negative refractive power, satisfying the following relational expressions: 1.10≤(R3+R4) / f≤1.70; 1.50≤f6 / R12-f7 / R14≤3.00; -3.30≤(R5+R6) / (R5-R6)≤-2.00; and 3.00≤d1 / d2≤12.00. The imaging optical lens (10) has good optical properties, such as a large aperture, a wide angle, and ultra-thinness.

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, which comprises seven lenses in total. The seven lenses, from the object side to the image side, are in the following order: 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, a sixth lens with positive refractive power, and a seventh lens with negative refractive power.

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

[0006] The focal length of the camera optical lens is f, 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 second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, 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 central radius of curvature of the image-side surface of the sixth lens is R12, the central radius of curvature of the image-side surface of the seventh lens is R14, the axial thickness of the first lens is d1, and the axial distance from the image-side surface of the first lens to the object-side surface of the second lens is d2, satisfying the following relationship:

[0007] 1.10≤(R3+R4) / f≤1.70;

[0008] 1.50≤f6 / R12-f7 / R14≤3.00;

[0009] -3.30≤(R5+R6) / (R5-R6)≤-2.00;

[0010] 3.00≤d1 / d2≤12.00.

[0011] Preferably, the total optical length of the camera lens is TTL, the field of view angle along the diagonal of the 1.0 field of view of the camera lens is FOV, and the image height of the 1.0 field of view of the camera lens is IH, and satisfies the following relationship:

[0012] 0.01≤TTL / IH / FOV≤0.02.

[0013] Preferably, the focal length of the first lens is f1, and it satisfies the following relationship:

[0014] 0.95≤f1 / f≤1.06.

[0015] Preferably, 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, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship:

[0016] -2.29≤(R1+R2) / (R1-R2)≤-1.75;

[0017] 0.123≤d1 / TTL≤0.144.

[0018] Preferably, the focal length of the second lens is f2, the on-axis thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0019] -4.41≤f² / f≤-3.78;

[0020] 6.97≤(R3+R4) / (R3-R4)≤9.18;

[0021] 0.017≤d3 / TTL≤0.033.

[0022] Preferably, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0023] 3.00≤f3 / f≤4.10;

[0024] 0.037≤d5 / TTL≤0.059.

[0025] Preferably, the focal length of the fourth lens is f4, 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 on-axis thickness of the fourth lens is d7, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0026] -6.90≤f4 / f≤-3.53;

[0027] -1.17≤(R7+R8) / (R7-R8)≤0.94;

[0028] 0.023≤d7 / TTL≤0.042.

[0029] Preferably, the focal length of the fifth lens is f5, the central radius of curvature of the object-side surface of the fifth lens is R9, the central radius of curvature of the image-side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0030] -148.40≤f5 / f≤45.43;

[0031] -26.63≤(R9+R10) / (R9-R10)≤47.79;

[0032] 0.027≤d9 / TTL≤0.063.

[0033] Preferably, the focal length of the sixth lens is f6, the central radius of curvature of the object-side surface of the sixth lens is R11, the on-axis thickness of the fifth lens is d11, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0034] 1.71≤f6 / f≤2.92;

[0035] -2.03≤(R11+R12) / (R11-R12)≤-0.42;

[0036] 0.084≤d11 / TTL≤0.175.

[0037] Preferably, the focal length of the seventh lens is f7, the central radius of curvature of the object-side surface of the seventh lens is R13, the axial thickness of the seventh lens is d13, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0038] -1.08≤f7 / f≤-0.78;

[0039] 1.11≤(R13+R14) / (R13-R14)≤1.27;

[0040] 0.082≤d13 / TTL≤0.185.

[0041] Preferably, the first lens is made of glass.

[0042] The beneficial effects of this application are as follows: the camera optical lens according to 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

[0043] 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:

[0044] Figure 1 is a schematic diagram of the structure of the camera optical lens according to the first embodiment of this application;

[0045] Figure 2 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 1;

[0046] Figure 3 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 1;

[0047] Figure 4 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 1;

[0048] Figure 5 is a schematic diagram of the structure of the camera optical lens according to the second embodiment of this application;

[0049] Figure 6 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 5;

[0050] Figure 7 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 5;

[0051] Figure 8 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 5;

[0052] Figure 9 is a schematic diagram of the structure of the camera optical lens according to the third embodiment of this application;

[0053] Figure 10 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 9;

[0054] Figure 11 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 9;

[0055] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 9;

[0056] Figure 13 is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of this application;

[0057] Figure 14 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 13;

[0058] Figure 15 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 13;

[0059] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 13;

[0060] Figure 17 is a schematic diagram of the structure of the camera optical lens according to the fifth embodiment of this application;

[0061] Figure 18 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 17;

[0062] Figure 19 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 17;

[0063] Figure 20 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 17. Detailed Implementation

[0064] 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.

[0065] Referring to the accompanying drawings, the technical solution of this application provides a camera optical lens 10, 20, 30, 40, and 50. Figures 1, 5, 9, 13, and 17 show the camera optical lenses 10, 20, 30, 40, and 50 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.

[0066] 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. Other materials may also be used for the lenses.

[0067] Define the center radius of curvature of the object side of the second lens L2 as R3, the center radius of curvature of the image side of the second lens L2 as R4, and the focal length of the camera optical lens as f, satisfying the following relationship: 1.10≤(R3+R4) / f≤1.70. Within the range of the condition, reasonably controlling the surface shape of the second lens L2 is beneficial to reducing the sensitivity of the system, improving the manufacturing yield by reducing the molding difficulty, and also reducing stray light generated by the lens, thereby improving the lens imaging quality.

[0068] The focal length of the sixth lens L6 is defined as f6, the focal length of the seventh lens L7 is defined as f7, the central radius of curvature of the image side of the sixth lens L6 is R12, and the central radius of curvature of the image side of the seventh lens L7 is defined as R14, satisfying the following relationship: 1.50≤f6 / R12-f7 / R14≤3.00. Within the range of the condition, the degree of deflection of the edge field of view in the sixth lens L6 and the seventh lens L7 is effectively controlled, thereby reducing the sensitivity of the entire camera optical lens.

[0069] The central radius of curvature of the object side of the third lens L3 is defined as R5, and the central radius of curvature of the image side of the third lens L3 is defined as R6, satisfying the following relationship: -3.30≤(R5+R6) / (R5-R6)≤-2.00, which specifies the shape of the third lens L3, and within the range of the condition, the field curvature offset of the central field of view is less than 0.03mm.

[0070] The axial thickness of the first lens L1 is defined as d1, and the axial distance from the image side of the first lens L1 to the object side of the second lens L2 is defined as d2, satisfying the following relationship: 3.00≤d1 / d2≤12.00. This specifies the ratio of the axial thickness of the first lens L1 to the axial distance from the image side of the first lens L1 to the object side of the second lens L2. Within the range of the condition, this helps to compress the overall length of the optical system.

[0071] Under the above conditions, the camera optical lenses 10, 20, 30, 40, and 50 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, 40, and 50, they are particularly suitable for mobile phone camera lens assemblies and web camera lenses composed of high-pixel CCD, CMOS, and other camera elements.

[0072] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0073] The total optical length of the camera lens is defined as TTL, the field of view angle along the diagonal of the 1.0 field of view of the camera lens is defined as FOV, and the image height of the 1.0 field of view of the camera lens is defined as IH, and the following relationship is satisfied: 0.01≤TTL / IH / FOV≤0.02. This specifies the ratio between the total optical length TTL, the field of view angle FOV along the diagonal of the 1.0 field of view, and the image height IH of the 1.0 field of view of the camera lens. Within the range of the condition, it helps to control the total length of the system under large image plane imaging.

[0074] The focal length of the first lens L1 is defined as f1, and the following relationship is satisfied: 0.95≤f1 / f≤1.06. This specifies the ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens. Within the range of the condition, by reasonably allocating the optical focal length of the system, the optical system can have better imaging quality and lower sensitivity.

[0075] 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.

[0076] Define the center radius of curvature of the object side of the first lens L1 as R1, and define the center radius of curvature of the image side of the first lens L1 as R2, satisfying the following relationship: -2.29≤(R1+R2) / (R1-R2)≤-1.75. Reasonably control the shape of the first lens L1 so that the first lens L1 can effectively correct the spherical aberration of the system.

[0077] The on-axis thickness of the first lens L1 is d1, and the total optical length of the camera lens is TTL. The following relationship is satisfied: 0.123≤d1 / TTL≤0.144. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0078] 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.

[0079] The focal length of the second lens L2 is defined as f2, which satisfies the following relationship: -4.41≤f2 / f≤-3.78. 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.

[0080] The center radius of curvature of the object side of the second lens L2 is R3, and the center radius of curvature of the image side of the second lens L2 is R4, satisfying the following relationship: 6.97≤(R3+R4) / (R3-R4)≤9.18, which defines the shape of the second lens L2. Within the range of the condition, as camera optical lenses develop towards ultra-thin and wide-angle, it is beneficial to correct on-axis chromatic aberration problems.

[0081] The on-axis thickness of the second lens L2 is d3, and the total optical length of the camera lens is TTL. The following relationship is satisfied: 0.017≤d3 / TTL≤0.033. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0082] 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.

[0083] The focal length of the third lens L3 is defined as f3, satisfying the following relationship 3.00≤f3 / f≤4.10. Through the reasonable allocation of optical power, the optical system has better imaging quality and lower sensitivity.

[0084] The on-axis thickness of the third lens L3 is d5, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.037≤d5 / TTL≤0.059. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0085] The object-side surface of the fourth lens L4 is concave near the axis, while the image-side surface is either concave or convex 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 or convex distributions.

[0086] The focal length of the fourth lens L4 is defined as f4, which satisfies the following relationship: -6.90≤f4 / f≤-3.53. Through the reasonable allocation of optical power, the optical system has better imaging quality and lower sensitivity.

[0087] The center radius of curvature of the object side of the fourth lens L4 is R7, and the center radius of curvature of the image side of the fourth lens L4 is R8, and they satisfy the following relationship: -1.17≤(R7+R8) / (R7-R8)≤0.94, which defines 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.

[0088] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.023≤d7 / TTL≤0.042. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0089] The object-side surface of the fifth lens L5 is convex near the axis, and the image-side surface is concave near the axis. The fifth lens L5 has either positive or 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.

[0090] The focal length of the fifth lens L5 is defined as f5, which satisfies the following relationship: -148.40≤f5 / f≤45.43. Through the reasonable allocation of optical power, the optical system has better imaging quality and lower sensitivity.

[0091] The central radius of curvature of the object side of the fifth lens L5 is R9, and the central radius of curvature of the image side of the fifth lens L5 is R10, satisfying the following relationship: -26.63≤(R9+R10) / (R9-R10)≤47.79, which defines 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.

[0092] The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.027≤d9 / TTL≤0.063. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0093] The object-side surface of the sixth lens L6 is convex near the axis, while the image-side surface is either concave or convex 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 or convex distributions.

[0094] The focal length of the sixth lens L6 is defined as f6, and the following relationship is satisfied: 1.71≤f6 / f≤2.92. Through the reasonable allocation of optical power, the optical system has better imaging quality and lower sensitivity.

[0095] 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, and they satisfy the following relationship: -2.03≤(R11+R12) / (R11-R12)≤-0.42, which defines the shape of the sixth lens L6. Within the specified range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0096] The on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.084≤d11 / TTL≤0.175. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0097] The object-side surface of the seventh lens L7 is convex near the axis, while the image-side surface is concave near the axis. The seventh lens L7 has negative refractive power. The object-side and image-side surfaces of the seventh lens L7 can also be configured with other concave and convex distributions.

[0098] The focal length of the seventh lens L7 is defined as f7, and the following relationship is satisfied: -1.08≤f7 / f≤-0.78. Through the reasonable allocation of optical power, the optical system has better imaging quality and lower sensitivity.

[0099] The central radius of curvature of the object side of the seventh lens L7 is R13, and the central radius of curvature of the image side of the seventh lens L7 is R14, satisfying the following relationship: 1.11≤(R13+R14) / (R13-R14)≤1.27, which defines the shape of the seventh lens L7. Within the specified range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0100] The on-axis thickness of the seventh lens L7 is d13, and it satisfies the following relationship: 0.082≤d13 / TTL≤0.185. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0101] The field of view (FOV) of the camera optical lens along the 1.0 field of view diagonal direction is greater than or equal to 74.98°, which, within the conditional range, is beneficial for achieving wide-angle viewing.

[0102] The aperture value FNO of the camera optical lens is less than or equal to 1.80. Within the conditional range, this is conducive to achieving a large aperture and good imaging performance of the camera optical lens.

[0103] The imaging optical lens of this application will be illustrated below with examples. The symbols used in each example are shown below. The units for focal length, on-axis distance, center radius of curvature, and on-axis thickness are mm.

[0104] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0105] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens;

[0106] 1.0 Field of View Image Height (IH): Half the diagonal length of the effective pixel area of ​​the sensor;

[0107] 1.0 Field of View (FOV) diagonally: The field of view angle corresponding to the effective pixel area of ​​the sensor;

[0108] MIC field of view image height IHm: The field of view height that extends beyond the 1.0 field of view image height to prevent assembly deviation;

[0109] Field of view (FOVm) diagonally: The field of view angle corresponding to the image height of the MIC field of view.

[0110] 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.

[0111] The technical solution of this application will be specifically described below through five implementation methods.

[0112] (First Implementation)

[0113] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of this application.

[0114] Table 1

[0115] The meanings of each symbol are as follows.

[0116] S1: Aperture;

[0117] R: Radius of curvature at the center of the optical surface;

[0118] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0119] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0120] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0121] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0122] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0123] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0124] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0125] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0126] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0127] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0128] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0129] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0130] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0131] R14: The central radius of curvature of the image-side surface of the seventh lens L7;

[0132] R15: The center radius of curvature of the object side surface of the optical filter GF;

[0133] R16: Radius of curvature of the center of the image side of the optical filter GF;

[0134] d: Axial thickness of the lens, axial distance between lenses;

[0135] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0136] d1: On-axis thickness of the first lens L1;

[0137] 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;

[0138] d3: On-axis thickness of the second lens L2;

[0139] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0140] d5: On-axis thickness of the third lens L3;

[0141] 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;

[0142] d7: On-axis thickness of the fourth lens L4;

[0143] 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;

[0144] d9: On-axis thickness of the fifth lens L5;

[0145] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0146] d11: On-axis thickness of the sixth lens L6;

[0147] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0148] d13: On-axis thickness of the seventh lens L7;

[0149] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0150] d15: On-axis thickness of the optical filter GF;

[0151] d16: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0152] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0153] nd1: The refractive index of the d-line of the first lens L1;

[0154] nd2: The refractive index of the d-line of the second lens L2;

[0155] nd3: The refractive index of the d-line of the third lens L3;

[0156] nd4: The refractive index of the d-line of the fourth lens L4;

[0157] nd5: The refractive index of the d-line of the fifth lens L5;

[0158] nd6: The refractive index of the d-line of the sixth lens L6;

[0159] nd7: The refractive index of the d-line of the seventh lens L7;

[0160] ndg: The refractive index of the d-line of the optical filter GF;

[0161] vd: Abbe number;

[0162] v1: Abbe number of the first lens L1;

[0163] v2: Abbe number of the second lens L2;

[0164] v3: Abbe number of the third lens L3;

[0165] v4: Abbe number of the fourth lens L4;

[0166] v5: Abbe number of the fifth lens L5;

[0167] v6: Abbe number of the sixth lens L6;

[0168] v7: Abbe number of the seventh lens L7;

[0169] vg: Abbe number of the optical filter GF.

[0170] Tables 2 and 3 show the aspherical data of each lens in the camera optical lens 10 of the first embodiment of this application.

[0171] Table 2

[0172] Table 3

[0173] 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 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0174] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 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).

[0175] Figures 2 and 3 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm 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 546nm 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.

[0176] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 3.523 mm, the image height IH of the 1.0 field of view is 6.000 mm, the field of view FOV in the diagonal direction of the 1.0 field of view is 85.11°, the image height IHm of the MIC field of view is 6.300 mm, and the field of view FOVm in the diagonal direction of the MIC field of view is 87.71°. 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.

[0177] (Second Implementation)

[0178] The second implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0179] In this embodiment, the fifth lens L5 has negative refractive power.

[0180] Table 4 shows the design data of the camera optical lens 20 according to the second embodiment of this application.

[0181] Table 4

[0182] Tables 5 and 6 show the aspherical data of each lens in the camera optical lens 20 of the second embodiment of this application.

[0183] Table 5

[0184] Table 6

[0185] Figures 6 and 7 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm 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 546nm 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.

[0186] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 3.447mm, the image height IH of the 1.0 field of view is 6.000mm, the field of view FOV in the diagonal direction of the 1.0 field of view is 80.00°, the image height IHm of the MIC field of view is 6.300mm, and the field of view FOVm in the diagonal direction of the MIC field of view is 83.42°. 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.

[0187] (Third Implementation)

[0188] The third implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0189] In this embodiment, the image-side surface of the fourth lens L4 is convex at the paraxial position, and the image-side surface of the sixth lens L6 is convex at the paraxial position.

[0190] Table 7 shows the design data of the camera optical lens 30 according to the third embodiment of this application.

[0191] Table 7

[0192] Tables 8 and 9 show the aspherical data of each lens in the camera optical lens 30 of the third embodiment of this application.

[0193] Table 8

[0194] Table 9

[0195] Figures 10 and 11 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 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 546 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.

[0196] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 4.194 mm, the image height IH of the 1.0 field of view is 6.000 mm, the field of view FOV in the diagonal direction of the 1.0 field of view is 74.98°, the image height IHm of the MIC field of view is 6.300 mm, and the field of view FOVm in the diagonal direction of the MIC field of view is 77.92°. 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.

[0197] (Fourth Implementation)

[0198] The fourth implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0199] Table 10 shows the design data of the camera optical lens 40 according to the fourth embodiment of this application.

[0200] Table 10

[0201] Tables 11 and 12 show the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of this application.

[0202] Table 11

[0203] Table 12

[0204] Figures 14 and 15 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 40 of the fourth embodiment, respectively. Figure 16 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 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.

[0205] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 3.558mm, the image height IH of the 1.0 field of view is 6.000mm, the field of view FOV in the diagonal direction of the 1.0 field of view is 84.25°, the image height IHm of the MIC field of view is 6.300mm, and the field of view FOVm in the diagonal direction of the MIC field of view is 86.82°. 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.

[0206] (Fifth Implementation)

[0207] The fifth embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0208] In this embodiment, the image-side surface of the sixth lens L6 is convex at the paraxial position.

[0209] Table 13 shows the design data of the camera optical lens 50 according to the fifth embodiment of this application.

[0210] Table 13

[0211] Tables 14 and 15 show the aspherical data of each lens in the camera optical lens 50 of the fifth embodiment of this application.

[0212] Table 14

[0213] Table 15

[0214] Figures 18 and 19 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 50 of the fifth embodiment, respectively. Figure 20 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the camera optical lens 50 of the fifth 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.

[0215] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 3.738 mm, the image height IH of the 1.0 field of view is 6.000 mm, the field of view FOV in the diagonal direction of the 1.0 field of view is 81.41°, the image height IHm of the MIC field of view is 6.300 mm, and the field of view FOVm in the diagonal direction of the MIC field of view is 84.27°. The camera optical lens 50 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.

[0216] Table 16, which appears later, shows the values ​​of each parameter in each of the first, second, third, fourth, and fifth embodiments and the values ​​corresponding to the parameters specified in some of the conditional expressions.

[0217] Table 16

[0218] 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, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The object-side surface of the first lens is convex at the paraxial direction, and the image-side surface of the first lens is concave at the paraxial direction. The object-side surface of the second lens is convex at the paraxial direction, and the image-side surface of the second lens is concave at the paraxial direction. The object-side surface of the third lens is convex at the paraxial direction, and the image-side surface of the third lens is concave at the paraxial direction. The object-side surface of the fourth lens is concave at the paraxial direction. The object-side surface of the fifth lens is convex at the paraxial direction, and the image-side surface of the fifth lens is concave at the paraxial direction. The object-side surface of the sixth lens is convex at the paraxial direction. The object-side surface of the seventh lens is convex at the paraxial direction, and the image-side surface of the seventh lens is concave at the paraxial direction. The focal length of the camera optical lens is f, 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 second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, 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 central radius of curvature of the image-side surface of the sixth lens is R12, the central radius of curvature of the image-side surface of the seventh lens is R14, the axial thickness of the first lens is d1, and the axial distance from the image-side surface of the first lens to the object-side surface of the second lens is d2, satisfying the following relationship: 1.10≤(R3+R4) / f≤1.70; 1.50≤f6 / R12-f7 / R14≤3.00; -3.30≤(R5+R6) / (R5-R6)≤-2.00; 3.00≤d1 / d2≤12.

00.

2. The camera optical lens according to claim 1, characterized in that, The total optical length of the camera lens is TTL, the field of view angle of the 1.0 field of view diagonal direction of the camera lens is FOV, and the image height of the 1.0 field of view of the camera lens is IH, and the following relationship is satisfied: 0.01≤TTL / IH / FOV≤0.

02.

3. The camera optical lens according to claim 1, wherein, The focal length of the first lens is f1, and it satisfies the following relationship: 0.95≤f1 / f≤1.

06.

4. The camera optical lens according to claim 1, characterized in that, The center radius of curvature of the object side of the first lens is R1, the center radius of curvature of the image side of the first lens is R2, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -2.29≤(R1+R2) / (R1-R2)≤-1.75; 0.123≤d1 / TTL≤0.

144.

5. The camera optical lens according to claim 1, characterized in that, The focal length of the second lens is f2, the on-axis thickness of the second lens is d3, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -4.41≤f2 / f≤-3.78; 6.97≤(R3+R4) / (R3-R4)≤9.18; 0.017≤d3 / TTL≤0.

033.

6. The camera optical lens according to claim 1, characterized in that, The focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the total optical length of the camera lens is TTL, and the following relationships are satisfied: 3.00≤f3 / f≤4.10; 0.037≤d5 / TTL≤0.

059.

7. The camera optical lens according to claim 1, characterized in that, The fourth lens has a focal length of f4, a central radius of curvature of the object side of the fourth lens of R7, a central radius of curvature of the image side of the fourth lens of R8, an on-axis thickness of d7, and a total optical length of TTL, satisfying the following relationships: -6.90≤f4 / f≤-3.53; -1.17≤(R7+R8) / (R7-R8)≤0.94; 0.023≤d7 / TTL≤0.

042.

8. The camera optical lens according to claim 1, characterized in that, The fifth lens has a focal length of f5, a central radius of curvature of the object side of the fifth lens of R9, a central radius of curvature of the image side of the fifth lens of R10, an axial thickness of d9, and a total optical length of TTL, satisfying the following relationships: -148.40≤f5 / f≤45.43; -26.63≤(R9+R10) / (R9-R10)≤47.79; 0.027≤d9 / TTL≤0.

063.

9. The camera optical lens according to claim 1, characterized in that, The sixth lens has a focal length of f6, a central radius of curvature of the object side of the sixth lens of R11, an on-axis thickness of d11 of the fifth lens, and an optical total length of TTL of the camera lens, and satisfies the following relationships: 1.71≤f6 / f≤2.92; -2.03≤(R11+R12) / (R11-R12)≤-0.42; 0.084≤d11 / TTL≤0.

175.

10. The camera optical lens according to claim 1, characterized in that, The seventh lens has a focal length of f7, a central radius of curvature of the object side of the seventh lens of R13, an axial thickness of d13, and a total optical length of TTL, satisfying the following relationships: -1.08≤f7 / f≤-0.78; 1.11≤(R13+R14) / (R13-R14)≤1.27; 0.082≤d13 / TTL≤0.

185.

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

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