Camera lens

Abstract

This invention relates to the field of optical lenses and discloses 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, 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 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 of the seventh lens is R13, the central radius of curvature of the image side of the seventh lens is R14, and the Abbe number of the first lens L1 is v1, satisfying the following relationships: 1.40≤(f6-f7) / f≤1.70; 2.00≤R14 / R13≤6.00; 60.00≤v1≤82.00.

Description

[Technical Field]

[0001] This invention 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 problems, the main objective of this invention is to provide a camera optical lens that, while possessing excellent optical performance, meets the design requirements of large aperture, ultra-thin design, and wide-angle capability.

[0004] To solve the above-mentioned technical problems, the embodiments of the present invention provide a camera optical lens comprising 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, 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 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 of the seventh lens is R13, the central radius of curvature of the image side of the seventh lens is R14, and the Abbe number of the first lens L1 is v1, satisfying the following relationship:

[0006] 1.40≤(f6-f7) / f≤1.70;

[0007] 2.00≤R14 / R13≤6.00;

[0008] 60.00≤v1≤82.00.

[0009] Preferably, the central radius of curvature of the object-side surface of the second lens is R3, and the central radius of curvature of the image-side surface of the second lens is R4, and they satisfy the following relationship:

[0010] 2.30≤(R3+R4) / (R3-R4)≤10.00.

[0011] Preferably, the axial thickness of the third lens is d5, the axial thickness of the fourth lens is d7, and they satisfy the following relationship:

[0012] 0.80≤d5 / d7≤2.00.

[0013] 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.

[0014] The focal length of the first lens is f1, 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 imaging optical lens is TTL, and satisfies the following relationship:

[0015] 0.69≤f1 / f≤1.03;

[0016] -2.66≤(R1+R2) / (R1-R2)≤-1.84;

[0017] 0.07≤d1 / TTL≤0.15.

[0018] 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.

[0019] 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, satisfying the following relationship:

[0020] -6.90≤f² / f≤-2.34;

[0021] 0.03≤d3 / TTL≤0.04.

[0022] Preferably, 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 axial 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] -6.08≤f3 / f≤13.84;

[0024] -5.96≤(R5+R6) / (R5-R6)≤-0.74;

[0025] 0.03≤d5 / TTL≤0.08.

[0026] Preferably, the image-side surface of the fourth lens is concave at the paraxial position;

[0027] 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 relationship:

[0028] -5.46≤f4 / f≤-2.12;

[0029] 0.81≤(R7+R8) / (R7-R8)≤3.77;

[0030] 0.02≤d7 / TTL≤0.05.

[0031] Preferably, the object-side surface of the fifth lens is concave near the axis, and the image-side surface of the fifth lens is convex near the axis.

[0032] The fifth lens has a focal length of f5, a central radius of curvature of the object-side surface of the fifth lens of R9, a central radius of curvature of the image-side surface of the fifth lens of R10, an axial thickness of d9, and a total optical length of TTL, satisfying the following relationship:

[0033] -57.40≤f5 / f≤112.29;

[0034] -3.61≤(R9+R10) / (R9-R10)≤1.85;

[0035] 0.06≤d9 / TTL≤0.09.

[0036] Preferably, 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.

[0037] The center radius of curvature of the object-side surface of the sixth lens is R11, the center radius of curvature of the image-side surface of the sixth lens is R12, the axial thickness of the fifth lens is d11, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

[0038] 0.68≤f6 / f≤0.95;

[0039] -1.41≤(R11+R12) / (R11-R12)≤-1.01;

[0040] 0.01≤d11 / TTL≤0.62.

[0041] Preferably, the object-side surface of the seventh lens is concave near the axis, and the image-side surface of the seventh lens is convex near the axis.

[0042] The seventh lens has an on-axis thickness of d13, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship:

[0043] -0.90≤f7 / f≤-0.55;

[0044] -2.97≤(R13+R14) / (R13-R14)≤-1.50;

[0045] 0.07≤d13 / TTL≤0.14.

[0046] Preferably, the second lens is made of glass.

[0047] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention 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 Image Description]

[0048] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0049] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0050] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0051] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0052] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0053] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0054] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0055] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0056] Figure 9This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0057] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0058] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0059] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0060] Figure 13 This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0061] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0062] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0063] Figure 16 yes Figure 13 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0064] Figure 17 This is a schematic diagram of the structure of the camera optical lens according to the fifth embodiment of the present invention;

[0065] Figure 18 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown;

[0066] Figure 19 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0067] Figure 20 yes Figure 17 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0068] Figure 21 This is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0069] Figure 22 yes Figure 21 A schematic diagram of axial aberrations of the camera optical lens shown;

[0070] Figure 23 yes Figure 21 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0071] Figure 24 yes Figure 21 The diagram shows the field curvature and distortion of the camera lens.

Detailed Implementation Methods

[0072] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention 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 provided in the various embodiments of this invention to facilitate a better understanding of the invention. However, the technical solutions claimed in this invention can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0073] Referring to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40, 50. Figure 1 , 5 Figures 9, 13, and 17 show the camera optical lenses 10, 20, 30, 40, and 50 of the present invention, which include seven lenses. Specifically, the camera optical lens 10, from the object side to the image side, includes, in sequence: 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 element may be disposed between the seventh lens L7 and the image plane S1.

[0074] The first lens L1 is made of plastic, the second lens L2 is made of plastic or glass, 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.

[0075] The focal length of the camera optical lens 10 is defined as f, the focal length of the sixth lens L6 is f6, and the focal length of the seventh lens L7 is f7, satisfying the following relationship 1.40≤(f6-f7) / f≤1.70. By reasonably allocating the optical power of the rear lens group, it is beneficial to correct the astigmatism and distortion of the camera optical lens 10, so that the distortion|Distortion|≤4%, and reduce the possibility of vignetting.

[0076] The central radius of curvature of the object side of the seventh lens L7 is defined as R13, and the central radius of curvature of the image side of the seventh lens L7 is defined as R14, satisfying the following relationship 2.00≤R14 / R13≤6.00. This defines the shape of the seventh lens L7, which can mitigate the degree of light deflection after passing through the lens within the condition range, effectively correct chromatic aberration, and make the chromatic aberration |LC|≤3.0μm.

[0077] The Abbe number of the first lens L1 is defined as v1, which satisfies the following relationship 60.00≤v1≤82.00. This specifies the Abbe number of the first lens L1. Within this range, material properties can be effectively allocated, chromatic aberration can be effectively corrected, and the chromatic aberration |LC|≤3.0μm.

[0078] The central radius of curvature of the object side of the second lens L2 is defined as R3, and the central radius of curvature of the image side of the second lens L2 is defined as R4, and the following relationship is satisfied: 2.30≤(R3+R4) / (R3-R4)≤10.00. This defines the shape of the second lens L2. Within the range of the condition, it is beneficial to mitigate the degree of light deflection after passing through the lens and can effectively reduce aberrations.

[0079] The on-axis thickness of the third lens is defined as d5, and the on-axis thickness of the fourth lens is defined as d7, satisfying the following relationship: 0.80≤d5 / d7≤2.00. This specifies the ratio of the on-axis thickness of the third lens L3 to the on-axis thickness of the fourth lens L4, which helps to compress the total length of the optical system within the conditional range.

[0080] 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.

[0081] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0082] 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.

[0083] The focal length of the first lens L1 is f1, and it satisfies the following relationship: 0.69≤f1 / f≤1.03. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0084] The central radius of curvature of the object side of the first lens L1 is R1, and the central radius of curvature of the image side of the first lens L1 is defined as R2, and the following relationship is satisfied: -2.66≤(R1+R2) / (R1-R2)≤-1.84. By reasonably controlling the shape of the first lens L1, the first lens L1 can effectively correct the spherical aberration of the system.

[0085] The on-axis thickness of the first lens L1 is d1, and the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.07≤d1 / TTL≤0.15. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0086] 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.

[0087] The focal length of the second lens L2 is f2, and it satisfies the following relationship: -6.90≤f2 / f≤-2.34. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0088] The on-axis thickness of the second lens L2 is d3, and the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.03≤d3 / TTL≤0.04. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0089] 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 or negative refractive power. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.

[0090] The focal length of the third lens L3 is f3, and it satisfies the following relationship: -6.08≤f3 / f≤13.84. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0091] The central radius of curvature of the object side of the third lens L3 is R5, and the central radius of curvature of the image side of the third lens L3 is R6, and the following relationship is satisfied: -5.96≤(R5+R6) / (R5-R6)≤-0.74, which specifies 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, it can mitigate the degree of light deflection after passing through the lens and effectively reduce aberrations.

[0092] The on-axis thickness of the third lens L3 is d5, and the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.03≤d5 / TTL≤0.08. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0093] 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.

[0094] The focal length of the fourth lens L4 is f4, and it satisfies the following relationship: -5.46≤f4 / f≤-2.12. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0095] The central radius of curvature of the object side of the fourth lens L4 is R7, and the central radius of curvature of the image side of the fourth lens L4 is R8, and they satisfy the following relationship: 0.81≤(R7+R8) / (R7-R8)≤3.77, 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.

[0096] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the camera lens is TTL. The following relationship is satisfied: 0.02≤d7 / TTL≤0.05. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0097] The object-side surface of the fifth lens L5 is concave near the axis, while the image-side surface is convex near the axis. The fifth lens L5 has positive or negative refractive power. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions.

[0098] The focal length of the fifth lens L5 is f5, and it satisfies the following relationship: -57.40≤f5 / f≤112.29. The limitation of the fifth lens L5 can effectively make the light angle of the camera optical lens 10 smooth and reduce the tolerance sensitivity.

[0099] 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, and they satisfy the following relationship: -3.61≤(R9+R10) / (R9-R10)≤1.85, which defines the shape of the fifth lens L5. 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.

[0100] The on-axis thickness of the fifth lens L5 is d9, and it satisfies the following relationship: 0.06≤d9 / TTL≤0.09. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0101] 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.

[0102] The focal length of the sixth lens L6 is f6, and it satisfies the following relationship: 0.68≤f6 / f≤0.95. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0103] 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: -1.41≤(R11+R12) / (R11-R12)≤-1.01, 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.

[0104] The on-axis thickness of the sixth lens L6 is d11, and it satisfies the following relationship: 0.01≤d11 / TTL≤0.62. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0105] The object-side surface of the seventh lens L7 is concave near the axis, while the image-side surface is convex 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.

[0106] The focal length of the seventh lens L7 is f7, and it satisfies the following relationship: -0.90≤f7 / f≤-0.55. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0107] 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 is R14. They satisfy the following relationship: -2.97≤(R13+R14) / (R13-R14)≤-1.50, which defines the shape of the seventh lens L7. Within the specified range, with the development of ultra-thin wide-angle lenses, this is beneficial for correcting aberrations and other problems in off-axis drawing angles.

[0108] The on-axis thickness of the seventh lens L7 is d13, and it satisfies the following relationship: 0.07≤d13 / TTL≤0.14. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0109] The field of view (FOV) of the camera optical lens 10 is greater than or equal to 64.15°, thereby achieving wide-angle viewing.

[0110] The camera optical lens 10 has an aperture value FNO less than or equal to 2.850, thereby achieving a large aperture and good imaging performance.

[0111] The camera optical lens of the present invention will be described below with examples. The symbols described in each example are as follows. The units for focal length, on-axis distance, center radius of curvature, on-axis thickness, inversion point position, and stagnation point position are mm.

[0112] TTL: Optical length (the axial distance from the object surface of the first lens L1 to the imaging surface Si), in mm;

[0113] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0114] 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);

[0115] 1.0 Field of View (FOV): The field of view angle corresponding to the effective pixel of the sensor;

[0116] Image height IHm of MIC field of view: The field of view height extended beyond 1.0 to prevent assembly deviation;

[0117] FOVm: The field of view angle corresponding to the image height of the MIC field of view.

[0118] 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.

[0119] The technical solution of the present invention will be described in detail below with five embodiments. At the same time, a comparative embodiment is provided for reference. The technical effects of the present invention cannot be achieved when the above-described conditions are not met.

[0120] (First Implementation)

[0121] Table 1 shows the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0122] Table 1

[0123]

[0124] S1: Aperture;

[0125] R: Radius of curvature at the center of the optical surface;

[0126] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0127] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0128] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0129] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0130] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0131] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0132] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0133] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0134] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0135] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0136] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0137] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0138] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0139] R14: The central radius of curvature of the image-side surface of the seventh lens L7;

[0140] R15: Radius of curvature of the object-side surface of the optical filter GF;

[0141] R16: Radius of curvature of the image-side surface of the optical filter GF;

[0142] d: The axial thickness of the lens and the axial distance between lenses;

[0143] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0144] d1: On-axis thickness of the first lens L1;

[0145] 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;

[0146] d3: On-axis thickness of the second lens L2;

[0147] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0148] d5: On-axis thickness of the third lens L3;

[0149] 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;

[0150] d7: On-axis thickness of the fourth lens L4;

[0151] 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;

[0152] d9: On-axis thickness of the fifth lens L5;

[0153] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0154] d11: On-axis thickness of the sixth lens L6;

[0155] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0156] d13: On-axis thickness of the seventh lens L7;

[0157] d14: The axial distance from the image-side surface of the seventh lens L7 to the object-side surface of the eighth lens L8;

[0158] d15: On-axis thickness of the optical filter GF;

[0159] d16: The axial distance from the image-side surface of the optical filter GF to the image plane;

[0160] nd: Refractive index of the d-line;

[0161] nd1: The refractive index of the d-line of the first lens L1;

[0162] nd2: The refractive index of the d-line of the second lens L2;

[0163] nd3: The refractive index of the d-line of the third lens L3;

[0164] nd4: The refractive index of the d-line of the fourth lens L4;

[0165] nd5: The refractive index of the d-line of the fifth lens L5;

[0166] nd6: The refractive index of the d-line of the sixth lens L6;

[0167] nd7: The refractive index of the d-line of the seventh lens L7;

[0168] ndg: The refractive index of the d-line of the optical filter GF;

[0169] vd: Abbe number;

[0170] v1: Abbe number of the first lens L1;

[0171] v2: Abbe number of the second lens L2;

[0172] v3: Abbe number of the third lens L3;

[0173] v4: Abbe number of the fourth lens L4;

[0174] v5: Abbe number of the fifth lens L5;

[0175] v6: Abbe number of the sixth lens L6;

[0176] v7: Abbe number of the seventh lens L7;

[0177] vg: Abbe number of the optical filter GF.

[0178] Tables 2 and 3 show the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0179] Table 2

[0180]

[0181]

[0182] Table 3

[0183]

[0184] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0185] 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

[0186] +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0187] 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).

[0188] Figure 2 , Figure 3A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 610nm, 555nm, 510nm, 470nm and 430nm passes through the camera optical lens 10 of the first embodiment.

[0189] Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0190] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 2.714 mm, the image height IH of the 1.0 field of view is 5.120 mm, the field of view FOV of the 1.0 field of view is 88.30°, the image height IHm of the MIC field of view is 5.335 mm, and the field of view FOVm of the MIC field of view is 90.69. 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.

[0191] (Second Implementation)

[0192] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0193] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0194] Table 4 shows the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0195] Table 4

[0196]

[0197]

[0198] Tables 5 and 6 show the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0199] Table 5

[0200]

[0201]

[0202] Table 6

[0203]

[0204] Figure 6 , Figure 7Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 20 of the second embodiment. Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0205] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 2.714 mm, the image height IH of the 1.0 field of view is 4.985 mm, the field of view FOV of the 1.0 field of view is 75.82°, the image height IHm of the MIC field of view is 5.213 mm, and the field of view FOVm of the MIC field of view is 78.13. 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.

[0206] (Third Implementation)

[0207] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0208] Unlike the first embodiment, the object side of the third lens L3 is concave near the axis, the image side of the fourth lens L4 is concave near the axis, and the third lens L3 has positive refractive power.

[0209] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0210] Table 7 shows the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0211] Table 7

[0212]

[0213] Tables 8 and 9 show the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0214] Table 8

[0215]

[0216] Table 9

[0217]

[0218]

[0219] Figure 10 , Figure 11Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 30 of the third embodiment. Figure 12 This illustrates the field curvature and distortion of light with a wavelength of 555nm after passing through the camera optical lens 30 of the third embodiment. Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0220] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 2.714 mm, the image height IH of the 1.0 field of view is 4.750 mm, the field of view FOV of the 1.0 field of view is 64.15°, the image height IHm of the MIC field of view is 4.900 mm, and the field of view FOVm of the MIC field of view is 66.04. 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.

[0221] (Fourth Implementation)

[0222] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0223] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0224] Table 10 shows the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0225] Table 10

[0226]

[0227]

[0228] Tables 11 and 12 show the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0229] Table 11

[0230]

[0231] Table 12

[0232]

[0233]

[0234] Figure 14 , Figure 15Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 This illustrates the field curvature and distortion of light with a wavelength of 555nm after passing through the camera optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0235] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 2.714 mm, the image height IH of the 1.0 field of view is 5.202 mm, the field of view FOV of the 1.0 field of view is 79.91°, the image height IHm of the MIC field of view is 5.433 mm, and the field of view FOVm of the MIC field of view is 82.27°. 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.

[0236] (Fifth Implementation)

[0237] The symbols in the fifth embodiment have the same meanings as those in the first embodiment.

[0238] Unlike the first embodiment, the image-side surface of the third lens L3 is convex near the axis, and the fifth lens L5 has positive refractive power.

[0239] Figure 17 The image shown is a camera optical lens 50 according to the fifth embodiment of the present invention.

[0240] Table 13 shows the design data of the camera optical lens 50 according to the fifth embodiment of the present invention.

[0241] Table 13

[0242]

[0243] Tables 14 and 15 show the aspherical data of each lens in the camera optical lens 50 of the fifth embodiment of the present invention.

[0244] Table 14

[0245]

[0246]

[0247] Table 15

[0248]

[0249] Figure 18 , Figure 19Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 50 of the fifth embodiment. Figure 20 This illustrates the field curvature and distortion of light with a wavelength of 555nm after passing through the camera optical lens 50 of the fifth embodiment. Figure 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0250] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 2.714 mm, the image height IH of the 1.0 field of view is 4.816 m, the field of view FOV of the 1.0 field of view is 87.73°, the image height IHm of the MIC field of view is 4.992 mm, and the field of view FOVm of the MIC field of view is 90.06. 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.

[0251] Table 19, which appears later, shows the values ​​corresponding to the parameters specified in the conditional expressions for various numerical values ​​in each of the first, second, third, fourth, and fifth implementation methods.

[0252] (Comparative Implementation Methods)

[0253] The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0254] Figure 21 The image shows a camera optical lens 60 according to a comparative embodiment.

[0255] Table 16 shows the design data of the camera optical lens 60 of the comparative embodiment.

[0256] Table 16

[0257]

[0258]

[0259] Tables 17 and 18 show the aspherical data of each lens in the comparative camera optical lens 60 of the present invention.

[0260] Table 17

[0261]

[0262] Table 18

[0263]

[0264]

[0265] Figure 22 , Figure 23 The diagrams show the axial aberrations and magnification chromatic aberrations of light with wavelengths of 656nm, 610nm, 555nm, 510nm and 470nm after passing through a comparative camera lens 60. Figure 24 This illustrates the field curvature and distortion of light with a wavelength of 555nm after passing through a comparative camera lens 60. Figure 24 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0266] Table 19 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 60 of the comparative embodiment does not satisfy the above conditional expression 1.40≤(f6-f7) / f≤1.70.

[0267] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 2.714mm, the image height IH of the 1.0 field of view is 5.120mm, the field of view FOV of the 1.0 field of view is 82.47°, the image height IHm of the MIC field of view is 5.335mm, and the field of view FOVm of the MIC field of view is 84.74°. The camera optical lens 60 does not meet the design requirements of large aperture, wide angle, and ultra-thin design.

[0268] Table 19

[0269]

[0270]

[0271] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A camera optical lens characterized in that, The camera optical lens comprises seven lenses in sequence from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens, 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 near axis, the image side surface of the first lens is concave at the near axis, the object side surface of the second lens is convex at the near axis, the image side surface of the second lens is concave at the near axis, the image side surface of the fourth lens is concave at the near axis, the object side surface of the fifth lens is concave at the near axis, the image side surface of the fifth lens is convex at the near axis, the object side surface of the sixth lens is convex at the near axis, the image side surface of the sixth lens is concave at the near axis, the object side surface of the seventh lens is concave at the near axis, and the image side surface of the seventh lens is convex at the near axis; 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 curvature radius of the object side surface of the seventh lens is R13, the central curvature radius of the image side surface of the seventh lens is R14, the Abbe number of the first lens L1 is v1, and the following relationships are satisfied: 1.40≤(f6-f7) / f≤1.70; 2.00≤R14 / R13≤6.00; 60.00≤v1≤82.00。 2. The camera optical lens according to claim 1, characterized in that, The central curvature radius of the object side surface of the second lens is R3, the central curvature radius of the image side surface of the second lens is R4, and the following relationships are satisfied: 2.30≤(R3+R4) / (R3-R4)≤10.

00.

3. The camera optical lens according to claim 1, wherein, The on-axis thickness of the third lens is d5, the on-axis thickness of the fourth lens is d7, and the following relationship is satisfied: 0.80≤d5 / d7≤2.

00.

4. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the central curvature radius of the object side surface of the first lens is R1, the central curvature radius of the image side surface of the first lens is R2, the on-axis thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 0.69≤f1 / f≤1.03; -2.66≤(R1+R2) / (R1-R2)≤-1.84; 0.07≤d1 / TTL≤0.

15.

5. The camera optical lens according to claim 1, wherein, The focal length of the second lens is f2, the on-axis thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: -6.90≤f2 / f≤-2.34; 0.03≤d3 / TTL≤0.

04.

6. The camera optical lens according to claim 1, characterized in that, The focal length of the third lens is f3, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the on-axis thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: -6.08≤f3 / f≤13.84; -5.96≤(R5+R6) / (R5-R6)≤-0.74; 0.03≤d5 / TTL≤0.

08.

7. The camera optical lens according to claim 1, wherein, A focal length of the fourth lens is f4, a central curvature radius of an object side surface of the fourth lens is R7, a central curvature radius of an image side surface of the fourth lens is R8, an on-axis thickness of the fourth lens is d7, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -5.46≤f4 / f≤-2.12; 0.81≤(R7+R8) / (R7-R8)≤3.77; 0.02≤d7 / TTL≤0.

05.

8. The camera optical lens according to claim 1, characterized in that, A focal length of the fifth lens is f5, a central curvature radius of an object side surface of the fifth lens is R9, a central curvature radius of an image side surface of the fifth lens is R10, an on-axis thickness of the fifth lens is d9, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -57.40≤f5 / f≤112.29; -3.61≤(R9+R10) / (R9-R10)≤1.85; 0.06≤d9 / TTL≤0.

09.

9. The camera optical lens according to claim 1, characterized in that, A central curvature radius of an object side surface of the sixth lens is R11, a central curvature radius of an image side surface of the sixth lens is R12, an on-axis thickness of the fifth lens is d11, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: 0.68≤f6 / f≤0.95; -1.41≤(R11+R12) / (R11-R12)≤-1.01; 0.01≤d11 / TTL≤0.

62.

10. The camera optical lens according to claim 1, characterized in that, An on-axis thickness of the seventh lens is d13, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -0.90≤f7 / f≤-0.55; -2.97≤(R13+R14) / (R13-R14)≤-1.50; 0.07≤d13 / TTL≤0.

14.

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

Images