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 negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with positive refractive power; the refractive index of the first lens is n1, and the axis from the image side of the third lens to the object side of the fourth lens is... The distance is d6, the total optical length of the camera lens is TTL, the field of view is FOV, the focal length is f, the full field of view image height is IH, 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 following relationships are satisfied: n1≥1.70; 0.06≤d6 / TTL≤0.08; 100.00≤(FOV×f) / IH≤130.00; -1.00≤(R13+R14) / (R13-R14)≤-0.70.

Description

Technical Field

[0001] This invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for terminal devices such as smartphones, digital cameras, and drones, 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 fisheye 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 achieve the above objectives, the present invention provides a camera optical lens comprising seven lenses, which, from the object side to the image side, are sequentially: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with positive refractive power; wherein the refractive index of the first lens is n1, the axial distance from the image side of the third lens to the object side of the fourth lens is d6, and the camera optical lens comprises seven lenses, which are arranged in the following order from the object side to the image side ... refractive index of the first lens is n1, the refractive index of the second lens is n1, the refractive index of the third lens is n1, the refractive index of the third lens is n1, the refractive index of the second lens is n1, the refractive index of the third lens is n1, the refractive index of the third lens is n1, the refractive index of the fourth lens is n1, the refractive index of the fifth lens is n1, the refractive index of The total optical length of the image optical lens is TTL, the field of view of the camera optical lens is FOV, the focal length of the camera optical lens is f, the full field of view image height of the camera optical lens is IH, the central radius of curvature of the object side of the seventh lens is R13, and the central radius of curvature of the image side of the seventh lens is R14, and the following relationships are satisfied: n1≥1.70; 0.06≤d6 / TTL≤0.08; 100.00≤(FOV×f) / IH≤130.00; -1.00≤(R13+R14) / (R13-R14)≤-0.70.

[0005] Preferably, the Abbe number of the fifth lens is v5, the Abbe number of the sixth lens is v6, and the following relationship is satisfied: v5-v6≥35.00.

[0006] Preferably, the on-axis thickness of the third lens is d5, and the on-axis thickness of the fourth lens is d7, and the following relationship is satisfied: 0.35≤d5 / d7≤0.70.

[0007] Preferably, the following relationship is satisfied: 6.50≤TTL / f≤8.50.

[0008] Preferably, the object-side surface of the first lens is convex near the axis, and the image-side surface of the first lens is concave near the axis; 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, and the axial thickness of the first lens is d1, and the following relationships are satisfied: -7.88≤f1 / f≤-1.93; 0.96≤(R1+R2) / (R1-R2)≤3.01; 0.02≤d1 / TTL≤0.14.

[0009] Preferably, the object-side surface of the second lens is convex near the axis, and the image-side surface of the second lens is concave near the axis; the focal length of the second lens is f2, the central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, and the on-axis thickness of the second lens is d3, and the following relationships are satisfied: -8.54≤f2 / f≤-2.48; 2.23≤(R3+R4) / (R3-R4)≤7.55; 0.02≤d3 / TTL≤0.06.

[0010] Preferably, the object-side surface of the third lens is convex near the axis, and the image-side surface of the third lens is concave near the axis; the focal length of the 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, and the axial thickness of the third lens is d5, and satisfies the following relationships: 3.23≤f3 / f≤13.49; -7.02≤(R5+R6) / (R5-R6)≤-2.07; 0.03≤d5 / TTL≤0.12.

[0011] Preferably, the object-side surface of the fourth lens is concave near the axis, and the image-side surface of the fourth lens is convex near the axis; 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, and the axial thickness of the fourth lens is d7, and satisfies the following relationships: 1.03≤f4 / f≤3.77; 0.62≤(R7+R8) / (R7-R8)≤1.88; 0.06≤d7 / TTL≤0.22.

[0012] Preferably, the object-side surface of the fifth lens is convex near the axis, and the image-side surface of the fifth lens is convex near the axis; 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, and the axial thickness of the fifth lens is d9, and satisfies the following relationships: 1.22≤f5 / f≤4.21; -0.15≤(R9+R10) / (R9-R10)≤0.08; 0.08≤d9 / TTL≤0.25.

[0013] Preferably, both the first lens and the fourth lens are made of glass.

[0014] 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, ultra-thinness and wide angle, and is especially suitable for mobile phone camera lens assemblies, WEB camera lenses and fisheye camera lenses for drones composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0016] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0018] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0019] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0020] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0021] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0022] Figure 7 yes Figure 5A schematic diagram of chromatic aberration at magnification for a camera lens;

[0023] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0024] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0025] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0026] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0027] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0028] Figure 13 This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0029] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0030] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0031] Figure 16 yes Figure 13 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0032] Figure 17 This is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0033] Figure 18 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown;

[0034] Figure 19 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0035] Figure 20 yes Figure 17 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0036] 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.

[0037] Reference Appendix Figures 1-16 The technical solution of the present invention provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5 Figures 9 and 13 show the camera optical lenses 10, 20, 30, and 40 of the present invention, which together comprise seven lenses. Specifically, the camera optical lenses, from the object side to the image side, are as follows: first lens L1, second lens L2, third lens L3, aperture S1, 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.

[0038] 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 glass, 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.

[0039] The refractive index of the first lens L1 is defined as n1, satisfying the following relationship: n1 ≥ 1.70, which specifies the refractive index of the first lens L1. The first lens L1 is preferably made of a high refractive index material, which is beneficial for reducing the front aperture of the camera optical lens and improving image quality.

[0040] The axial distance from the image side of the third lens L3 to the object side of the fourth lens L4 is defined as d6, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.06≤d6 / TTL≤0.08. This specifies the ratio of the distance between the two lenses at the aperture stop S1 to the total optical length. The two lenses at the aperture stop S1 are relatively far apart, and the light transition is smooth near the aperture stop S1, which is beneficial to improving image quality.

[0041] The field of view of the camera optical lens is defined as FOV, the focal length of the camera optical lens is f, and the full field of view image height of the camera optical lens is IH, satisfying the following relationship: 100.00≤(FOV×f) / IH≤130.00, which takes into account both ultra-large field of view and focal length, and realizes medium and long distance imaging.

[0042] 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: -1.00≤(R13+R14) / (R13-R14)≤-0.70, which specifies the shape of the seventh lens L7. Within the range of the condition, the field curvature of the system can be effectively balanced, so that the field curvature offset of the central field of view is less than 0.01mm.

[0043] The Abbe number of the fifth lens L5 is defined as v5, and the Abbe number of the sixth lens L6 is defined as v6, satisfying the following relationship: v5-v6≥35.00. This specifies the difference between the Abbe numbers of the fifth lens L5 and the sixth lens L6. Within the range of the condition, material properties can be effectively allocated, chromatic aberration can be effectively corrected, and the chromatic aberration |LC|≤12μm can be achieved.

[0044] The on-axis thickness of the third lens L3 is defined as d5, and the on-axis thickness of the fourth lens L4 is defined as d7, satisfying the following relationship: 0.35≤d5 / d7≤0.70. This specifies the ratio of the center thickness of the third lens L3 to the center thickness of the fourth lens L4. Within the range of the condition, this helps to compress the total optical length of the system.

[0045] The total optical length (TTL) and focal length (f) of the camera lens satisfy the following relationship: 6.50 ≤ TTL / f ≤ 8.50, which specifies the telephoto ratio. When the total optical length is less than the upper limit of the condition, it is possible to control the total optical length to be shorter, making it easier to achieve miniaturization. When the total optical length is greater than the lower limit of the condition, it is easier to correct distortion and on-axis chromatic aberration, and maintain good optical performance.

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

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

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

[0049] The focal length of the camera optical lens is defined as f, and the focal length of the first lens L1 is f1, satisfying the following relationship: -7.88 ≤ f1 / f ≤ -1.93, which specifies the ratio of the negative refractive power of the first lens L1 to the overall focal length. Within the specified range, the first lens L1 has appropriate negative refractive power, which is beneficial for reducing system aberrations and also for the development of ultra-thin and wide-angle lenses. Preferably, it satisfies -4.92 ≤ f1 / f ≤ -2.41.

[0050] The central radius of curvature of the object-side surface of the first lens L1 is defined as R1, and the central radius of curvature of the image-side surface of the first lens L1 is defined as R2, satisfying the following relationship: 0.96≤(R1+R2) / (R1-R2)≤3.01. By reasonably controlling the shape of the first lens L1, it is possible to effectively correct the spherical aberration of the system. Preferably, it satisfies 1.53≤(R1+R2) / (R1-R2)≤2.41.

[0051] The first lens L1 has an on-axis thickness of d1, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 0.02≤d1 / TTL≤0.14. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d1 / TTL≤0.11.

[0052] 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.

[0053] The focal length of the camera optical lens is defined as f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: -8.54 ≤ f2 / f ≤ -2.48. 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. Preferably, -5.34 ≤ f2 / f ≤ -3.10 is satisfied.

[0054] The center radius of curvature of the object-side surface of the second lens L2 is R3, and the center radius of curvature of the image-side surface of the second lens L2 is R4, satisfying the following relationship: 2.23≤(R3+R4) / (R3-R4)≤7.55, which defines the shape of the second lens L2. When within this range, as lenses develop towards ultra-thin and wide-angle designs, it is beneficial for correcting on-axis chromatic aberration. Preferably, it satisfies 3.57≤(R3+R4) / (R3-R4)≤6.04.

[0055] The second lens L2 has an on-axis thickness of d3, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.02≤d3 / TTL≤0.06. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d3 / TTL≤0.05.

[0056] 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.

[0057] The focal length of the camera optical lens is defined as f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: 3.23 ≤ f3 / f ≤ 13.49. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 5.16 ≤ f3 / f ≤ 10.80.

[0058] The central radius of curvature of the object-side surface of the third lens L3 is R5, and the central radius of curvature of the image-side surface of the third lens L3 is R6, satisfying the following relationship: -7.02≤(R5+R6) / (R5-R6)≤-2.07. This defines the shape of the third lens L3, which is beneficial for its formation. Within the specified range, it can mitigate the degree of light refraction after passing through the lens and effectively reduce aberrations. Preferably, it satisfies -4.39≤(R5+R6) / (R5-R6)≤-2.59.

[0059] The axial thickness of the third lens L3 is d5, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.03≤d5 / TTL≤0.12. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d5 / TTL≤0.10.

[0060] The object-side surface of the fourth lens L4 is concave near the axis, while the image-side surface is convex near the axis. The fourth lens L4 has positive refractive power. The object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave and convex distributions.

[0061] The focal length of the camera optical lens is defined as f, and the focal length of the fourth lens L4 is f4, satisfying the following relationship: 1.03 ≤ f4 / f ≤ 3.77. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 1.65 ≤ f4 / f ≤ 3.01.

[0062] The central radius of curvature of the object-side surface of the fourth lens L4 is R7, and the central radius of curvature of the image-side surface of the fourth lens L4 is R8, satisfying the following relationship: 0.62≤(R7+R8) / (R7-R8)≤1.88. This defines the shape of the fourth lens L4. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 0.99≤(R7+R8) / (R7-R8)≤1.50.

[0063] The fourth lens L4 has an on-axis thickness of d7, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.06≤d7 / TTL≤0.22. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.09≤d7 / TTL≤0.18.

[0064] The object-side surface of the fifth lens L5 is convex near the axis, and the image-side surface is also convex near the axis. The fifth lens L5 has positive refractive power. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions.

[0065] The focal length of the camera optical lens is defined as f, and the focal length of the fifth lens L5 is f5, satisfying the following relationship: 1.22≤f5 / f≤4.21. This limitation on the fifth lens L5 effectively makes the light angle of the camera optical lens 10 smoother, reducing tolerance sensitivity. Preferably, it satisfies 1.95≤f5 / f≤3.37.

[0066] The central radius of curvature of the object-side surface of the fifth lens L5 is R9, and the central radius of curvature of the image-side surface of the fifth lens L5 is R10, satisfying the following relationship: -0.15≤(R9+R10) / (R9-R10)≤0.08, which defines the shape of the fifth lens L5. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies -0.09≤(R9+R10) / (R9-R10)≤0.06.

[0067] The fifth lens L5 has an on-axis thickness of d9, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.08≤d9 / TTL≤0.25. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.12≤d9 / TTL≤0.20.

[0068] The object-side surface of the sixth lens L6 is concave near the axis, and the image-side surface is also concave near the axis. The sixth lens L6 has negative refractive power. The object-side and image-side surfaces of the sixth lens L6 can also be configured with other concave or convex distributions.

[0069] The focal length of the camera optical lens is defined as f, and the focal length of the sixth lens L6 is f6, satisfying the following relationship: -3.70 ≤ f6 / f ≤ -1.00. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -2.31 ≤ f6 / f ≤ -1.25.

[0070] The central radius of curvature of the object-side surface of the sixth lens L6 is R11, and the central radius of curvature of the image-side surface of the sixth lens L6 is R12, satisfying the following relationship: 0.09≤(R11+R12) / (R11-R12)≤0.43. This defines the shape of the sixth lens L6. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 0.14≤(R11+R12) / (R11-R12)≤0.34.

[0071] The axial thickness of the sixth lens L6 is d11, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.02≤d11 / TTL≤0.09. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d11 / TTL≤0.07.

[0072] The object-side surface of the seventh lens L7 is convex near the axis, and the image-side surface is also convex near the axis. The seventh lens L7 has positive refractive power. The object-side surface and image-side surface of the seventh lens L7 can also be configured with other concave and convex distributions.

[0073] The focal length of the camera optical lens is defined as f, and the focal length of the seventh lens L7 is f7, satisfying the following relationship: 0.91≤f7 / f≤3.00. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 1.46≤f7 / f≤2.40.

[0074] The central radius of curvature of the object-side surface of the seventh lens L7 is R13, and the central radius of curvature of the image-side surface of the seventh lens L7 is R14, satisfying the following relationship: -1.91≤(R13+R14) / (R13-R14)≤-0.47, which defines the shape of the seventh lens L7. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies -1.19≤(R13+R14) / (R13-R14)≤-0.59.

[0075] The axial thickness of the seventh lens L7 is d13, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.06≤d13 / TTL≤0.18. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.09≤d13 / TTL≤0.15.

[0076] The image height of the camera optical lens is IH, and the total optical length of the camera optical lens is TTL, satisfying the following relationship: TTL / IH≤4.79, which is beneficial for achieving ultra-thinness. Preferably, TTL / IH≤4.66 is satisfied.

[0077] The field of view (FOV) of the camera optical lens is greater than or equal to 187.05°, thereby achieving wide-angle viewing.

[0078] The aperture value FNO of the camera optical lens is less than or equal to 1.43, thereby achieving a large aperture and good imaging performance.

[0079] 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.

[0080] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0081] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0082] 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.

[0083] The technical solution of the present invention will be described in detail below with four 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.

[0084] (First Implementation)

[0085] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0086] Table 1

[0087]

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

[0089] S1: Aperture;

[0090] R: Radius of curvature at the center of the optical surface;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0105] R15: The center radius of curvature of the object side surface of the optical filter GF;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0122] d14: The axial distance from the image-side surface of the seventh lens L7 to the object-side surface of the eighth lens L8;

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

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

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

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

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

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

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

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

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

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

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

[0134] vd: Abbe number;

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

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

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

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

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

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

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

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

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

[0144] Table 2

[0145]

[0146]

[0147] 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).

[0148] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0149] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0150] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspherical curve and the optical axis, and z is the aspherical depth (the perpendicular distance between a point on the aspherical surface at a distance r from the optical axis and a tangent plane at the vertex of the aspherical optical axis).

[0151] Tables 3 and 4 show the inflection point and stagnation point design data of each lens in the camera optical lens 10 of the first embodiment of the present invention. P1R1 and P1R2 represent the object-side and image-side surfaces of the first lens L1, respectively; P2R1 and P2R2 represent the object-side and image-side surfaces of the second lens L2, respectively; P3R1 and P3R2 represent the object-side and image-side surfaces of the third lens L3, respectively; P4R1 and P4R2 represent the object-side and image-side surfaces of the fourth lens L4, respectively; P5R1 and P5R2 represent the object-side and image-side surfaces of the fifth lens L5, respectively; P6R1 and P6R2 represent the object-side and image-side surfaces of the sixth lens L6, respectively; and P7R1 and P7R2 represent the object-side and image-side surfaces of the seventh lens L7, respectively. The data corresponding to the "Inflection Point Position" column is the vertical distance from the inflection point set on the surface of each lens to the optical axis of the camera optical lens 10. The data in the "Station Point Position" field corresponds to the vertical distance from the station point set on each lens surface to the optical axis of the camera optical lens 10.

[0152] Table 3

[0153]

[0154]

[0155] Table 4

[0156] P5R2 1 2.185 P6R1 1 2.195 P7R2 2 0.745 2.365

[0157] Figure 2 , Figure 3 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 10 of the first embodiment. 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.

[0158] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 1.016 mm, the full field of view image height IH is 2.733 mm, and the field of view FOV in the diagonal direction is 206.00°. 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.

[0159] (Second Implementation)

[0160] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0161] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0162] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0163] Table 5

[0164]

[0165]

[0166] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0167] Table 6

[0168]

[0169] Tables 7 and 8 show the inflection point and stagnation point design data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0170] Table 7

[0171] P2R1 3 0.935 2.055 2.215 / P2R2 2 1.055 1.465 / / P3R1 1 1.425 / / / P5R1 1 1.735 / / / P5R2 1 1.885 / / / P6R1 1 1.825 / / / P6R2 4 0.645 0.745 1.845 2.195 P7R1 1 2.065 / / / P7R2 2 0.195 2.055 / /

[0172] Table 8

[0173] P7R2 1 0.335

[0174] Figure 6 , Figure 7 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 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.

[0175] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 1.221 mm, the full field of view image height IH is 2.697 mm, and the field of view FOV in the diagonal direction is 197.38°. 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.

[0176] (Third Implementation)

[0177] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0178] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0179] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0180] Table 9

[0181]

[0182] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0183] Table 10

[0184]

[0185]

[0186] Tables 11 and 12 show the inflection point and stagnation point design data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0187] Table 11

[0188] P2R1 1 0.925 / / P2R2 2 1.015 1.535 / P3R1 1 1.395 / / P5R2 1 1.815 / / P6R1 1 1.845 / / P6R2 3 0.555 0.825 1.695 P7R1 1 1.625 / / P7R2 1 0.495 / /

[0189] Table 12

[0190] P7R2 1 0.905

[0191] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 30 of the third embodiment. Figure 12 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes 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.

[0192] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 30 is 1.0138 mm, the full field of view (IH) is 2.735 mm, and the field of view (FOV) in the diagonal direction is 189.23°. 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.

[0193] (Fourth Implementation)

[0194] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0195] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0196] Tables 13 and 14 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0197] Table 13

[0198]

[0199] Table 14 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0200] Table 14

[0201]

[0202]

[0203] Tables 15 and 16 show the inflection point and stagnation point design data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0204] Table 15

[0205] P2R1 2 0.915 2.035 / P2R2 2 1.005 1.475 / P5R1 1 1.635 / / P5R2 2 1.905 2.225 / P6R1 2 1.825 2.225 / P6R2 1 1.735 / / P7R1 3 2.165 2.575 2.765 P7R2 3 0.435 2.345 2.435

[0206] Table 16

[0207] P2R1 2 1.785 2.135 P5R1 1 2.065 / P6R2 1 2.445 / P7R1 1 2.885 / P7R2 1 0.775 /

[0208] Figure 14 , Figure 15 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes 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.

[0209] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 40 is 1.027 mm, the full field of view (IH) is 2.700 mm, and the field of view (FOV) in the diagonal direction is 187.56°. 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.

[0210] Table 21, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in the conditional expressions in each of the first, second, third, and fourth embodiments.

[0211] (Comparative Implementation Methods)

[0212] The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0213] Figure 17 The image shows a camera lens 50 according to a comparative embodiment.

[0214] Tables 17 and 18 show the design data of the camera optical lens 50 of the comparative embodiment.

[0215] Table 17

[0216]

[0217]

[0218] Table 18 shows the aspherical data of each lens in the camera optical lens 50 of the comparative embodiment.

[0219] Table 18

[0220]

[0221] Tables 19 and 20 show the inflection point and stagnation point design data of each lens in the camera optical lens 50 of the comparative embodiment.

[0222] Table 19

[0223]

[0224]

[0225] Table 20

[0226] P2R1 1 1.985 P7R2 1 0.945

[0227] Figure 18 , Figure 19 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the camera optical lens 50 of the comparative embodiment. Figure 20 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 50 of the comparative 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.

[0228] Table 21 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the above conditional expression n1≥1.70.

[0229] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 1.181mm, the full field of view image height IH is 2.830mm, and the diagonal field of view FOV is 186.61°. The camera optical lens 50 does not meet the design requirements of large aperture and wide angle.

[0230] Table 21

[0231]

[0232]

[0233] 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, which are arranged in the following order from the object side to the image side: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with positive 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, and the image-side surface of the fourth lens is convex 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 convex at the paraxial direction. Wherein, the refractive index of the first lens is n1, the axial distance from the image-side surface of the third lens to the object-side surface of the fourth lens is d6, the total optical length of the camera lens is TTL, the field of view of the camera lens is FOV, the focal length of the camera lens is f, the full field-of-view image height of the camera lens is IH, the central radius of curvature of the object-side surface of the seventh lens is R13, the central radius of curvature of the image-side surface of the seventh lens is R14, and the following relationship is satisfied: n1≥1.70； 0.06≤d6 / TTL≤0.08; 100.00≤(FOV×f) / IH≤130.00; -1.00≤(R13+R14) / (R13-R14)≤-0.

70.

2. The camera optical lens according to claim 1, characterized in that, The Abbe number of the fifth lens is v5, and the Abbe number of the sixth lens is v6, and they satisfy the following relationship: v5-v6≥35.

00.

3. The camera optical lens according to claim 1, characterized in that, The third lens has an on-axis thickness of d5, and the fourth lens has an on-axis thickness of d7, satisfying the following relationship: 0.35≤d5 / d7≤0.

70.

4. The camera optical lens according to claim 1, characterized in that, The following relationship must be satisfied: 6.50≤TTL / f≤8.

50.

5. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the central radius of curvature of the object side of the first lens is R1, the central radius of curvature of the image side of the first lens is R2, and the axial thickness of the first lens is d1, and the following relationship is satisfied: -7.88≤f1 / f≤-1.93; 0.96≤(R1+R2) / (R1-R2)≤3.01; 0.02≤d1 / TTL≤0.

14.

6. The camera optical lens according to claim 1, characterized in that, The focal length of the second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, and the axial thickness of the second lens is d3, satisfying the following relationship: -8.54≤f² / f≤-2.48; 2.23≤(R3+R4) / (R3-R4)≤7.55; 0.02≤d3 / TTL≤0.

06.

7. The camera optical lens according to claim 1, characterized in that, The focal length of the third lens is f3, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, and the axial thickness of the third lens is d5, and the following relationship is satisfied: 3.23≤f3 / f≤13.49; -7.02≤(R5+R6) / (R5-R6)≤-2.07; 0.03≤d5 / TTL≤0.

12.

8. 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, and an axial thickness of d7, and satisfies the following relationship: 1.03≤f4 / f≤3.77; 0.62≤(R7+R8) / (R7-R8)≤1.88; 0.06≤d7 / TTL≤0.

22.

9. 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, and an axial thickness of d9, and satisfies the following relationship: 1.22≤f5 / f≤4.21; -0.15≤(R9+R10) / (R9-R10)≤0.08; 0.08≤d9 / TTL≤0.

25.

10. The camera optical lens according to claim 1, characterized in that, The first lens is made of glass, and the fourth lens is made of glass.

Images