Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises, in sequence from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, a fifth lens with refractive power, a sixth lens with refractive power, a seventh lens with refractive power, and an eighth lens with refractive power; wherein the focal length of the camera optical lens is f, the focal length of the second lens is f2, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, the central curvature radius of the object side of the fifth lens is R9, the central curvature radius of the image side of the fifth lens is R10, the focal length of the seventh lens is f7, the focal length of the eighth lens is f8, and the following relationships are satisfied: -5.00 <= f2 / f <= -1.50; R7 / R8 <= -2.00; 2.00 <= (R9+R10) / (R9-R10) <= 12.00; and 2.00 <= f7 / f8 <= 10.00.

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, eight-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 present invention aims 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 address the aforementioned technical problems, embodiments of the present invention provide a camera optical lens, which, from the object side to the image side, sequentially comprises: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, a fifth lens with refractive power, a sixth lens with refractive power, a seventh lens with refractive power, and an eighth lens with refractive power; wherein the focal length of the camera optical lens is f, the focal length of the second lens is f2, and the fourth lens has an object-side... The central radius of curvature of the fourth lens is R7, the central radius of curvature of the image side of the fifth lens is R8, the central radius of curvature of the object side of the fifth lens is R9, the central radius of curvature of the image side of the fifth lens is R10, the focal length of the seventh lens is f7, and the focal length of the eighth lens is f8, and the following relationships are satisfied: -5.00≤f2 / f≤-1.50; R7 / R8≤-2.00; 2.00≤(R9+R10) / (R9-R10)≤12.00; 2.00≤f7 / f8≤10.00.

[0005] Preferably, the axial distance from the image side of the fifth lens to the object side of the sixth lens is d10, and the axial distance from the image side of the sixth lens to the object side of the seventh lens is d12, and satisfies the following relationship: d10 / d12≥2.00.

[0006] Preferably, the central radius of curvature of the object side of the sixth lens is R11, and the central radius of curvature of the image side of the sixth lens is R12, and they satisfy the following relationship: 1.50≤R11 / R12≤30.00.

[0007] Preferably, the object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position; the 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 camera lens is TTL, and satisfies the following relationships: 0.45≤f1 / f≤1.63; -3.73≤(R1+R2) / (R1-R2)≤-0.88; 0.05≤d1 / TTL≤0.15.

[0008] Preferably, the object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position; the central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the camera lens is TTL, and satisfies the following relationships: 1.69≤(R3+R4) / (R3-R4)≤16.84; 0.01≤d3 / TTL≤0.06.

[0009] 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, the axial thickness of the third lens is d5, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -33.28≤f3 / f≤17.98; -19.66≤(R5+R6) / (R5-R6)≤15.01; 0.01≤d5 / TTL≤0.05.

[0010] Preferably, the object-side surface of the fourth lens is convex at the paraxial position, and the image-side surface of the fourth lens is convex at the paraxial position; the focal length of the fourth lens is f4, and the total optical length of the camera lens is TTL, and satisfies the following relationships: 1.73≤f4 / f≤5.79; 0.03≤d7 / TTL≤0.11.

[0011] Preferably, the focal length of the fifth lens is f5, the on-axis thickness of the fifth lens is d9, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -20.63≤f5 / f≤121.56; 0.01≤d9 / TTL≤0.08.

[0012] Preferably, the focal length of the sixth lens is f6, the on-axis thickness of the sixth lens is d11, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -40.60≤f6 / f≤2.50; 0.03≤d11 / TTL≤0.17.

[0013] Preferably, the object-side surface of the seventh lens is convex at the paraxial position, and the image-side surface of the seventh lens is concave at the paraxial position; the focal length of the seventh lens is f7, the central radius of curvature of the object-side surface of the seventh lens is R13, the central radius of curvature of the image-side surface of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -23.52≤f7 / f≤681.13; 4.36≤(R13+R14) / (R13-R14)≤54.25; 0.02≤d13 / TTL≤0.15.

[0014] Preferably, the object-side surface of the eighth lens is convex at the paraxial position, and the image-side surface of the eighth lens is concave at the paraxial position; the focal length of the eighth lens is f8, the central radius of curvature of the object-side surface of the eighth lens is R15, the central radius of curvature of the image-side surface of the eighth lens is R16, the axial thickness of the eighth lens is d15, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -2.36≤f8 / f≤382.25; 0.99≤(R15+R16) / (R15-R16)≤17.17; 0.02≤d15 / TTL≤0.23.

[0015] 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 Figure Description

[0016] 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:

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

[0018] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0019] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0020] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

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

[0022] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0023] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0024] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

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

[0026] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0027] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0028] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

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

[0030] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0031] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0032] Figure 16 yes Figure 13 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0033] Figure 17This is a schematic diagram of the structure of the camera optical lens according to the fifth embodiment of the present invention;

[0034] Figure 18 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown;

[0035] Figure 19 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0036] Figure 20 yes Figure 17 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0037] Figure 21 This is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0038] Figure 22 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown;

[0039] Figure 23 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0040] Figure 24 yes Figure 17 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0041] 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.

[0042] (First Implementation)

[0043] Referring to the accompanying drawings, the present invention provides a camera optical lens 10. Figure 1 The image shown is a camera optical lens 10 according to a first embodiment of the present invention. The camera optical lens 10 comprises eight lenses. Specifically, from the object side to the image side, the camera optical lens 10 consists of: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and eighth lens L8. An optical filter GF or other optical element may be disposed between the eighth lens L8 and the image plane S1.

[0044] In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 are all made of plastic. In other optional embodiments, the lenses may be made of other materials.

[0045] In this embodiment, the focal length of the camera optical lens 10 is defined as f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship -5.00≤f2 / f≤-1.50. This specifies the ratio of the focal length of the second lens L2 to the focal length of the camera optical lens 10. Within this range, the field curvature of the camera optical lens 10 can be effectively balanced, making the field curvature shift of the central field of view less than 5μm.

[0046] The center radius of curvature of the object side of the fourth lens L4 is defined as R7, and the center radius of curvature of the image side of the fourth lens L4 is defined as R8, satisfying the following relationship: R7 / R8≤-2.00. This defines the shape of the fourth lens L4, which is beneficial for correcting astigmatism and distortion of the camera optical lens 10, making the distortion|Distortion|≤2.6%, and reducing the possibility of vignetting.

[0047] The central radius of curvature of the object side of the fifth lens L5 is defined as R9, and the central radius of curvature of the image side of the fifth lens L5 is defined as R10, satisfying the following relationship: 2.00≤(R9+R10) / (R9-R10)≤12.00. This defines the shape of the fifth lens L5, reduces the degree of light deflection within the range, effectively corrects chromatic aberration, and makes the chromatic aberration |LC|≤3.0μm.

[0048] The focal length of the seventh lens L7 is defined as f7, and the focal length of the eighth lens L8 is defined as f8, satisfying the following relationship: 2.00≤f7 / f8≤10.00. This specifies the ratio of the focal lengths of the seventh and eighth lenses. Through the reasonable allocation of focal lengths, the system has better imaging quality and lower sensitivity.

[0049] The axial distance from the image side of the fifth lens L5 to the object side of the sixth lens L6 is defined as d10, and the axial distance from the image side of the sixth lens L6 to the object side of the seventh lens L7 is defined as d12, satisfying the following relationship: d10 / d12≥2.00. This specifies the ratio of the air gap between the fifth and sixth lenses to the air gap between the sixth and seventh lenses. Within the range of the condition, this helps to compress the total length of the optical system and achieve an ultra-thin effect.

[0050] The center radius of curvature of the object side of the sixth lens L6 is defined as R11, and the center radius of curvature of the image side of the sixth lens L6 is defined as R12, and the following relationship is satisfied: 1.50≤R11 / R12≤30.00. This defines the shape of the sixth lens L6, which is beneficial for correcting astigmatism and distortion of the camera optical lens 10 within the condition range, so that the distortion|Distortion|≤2.6%, and reduces the possibility of vignetting.

[0051] In this embodiment, the object-side surface of the first lens L1 is convex near the axis, and the image-side surface is concave near the axis, thus the first lens L1 has positive refractive power. In other optional embodiments, the object-side surface and image-side surface of the first lens L1 may also be configured with other concave and convex distributions.

[0052] The focal length of the first lens is defined as f1, satisfying the following relationship: 0.45≤f1 / f≤1.63. Reasonable control of the refractive power of the first lens is beneficial for achieving a wide-angle view in the camera lens. Preferably, it satisfies 0.72≤f1 / f≤1.30.

[0053] Define the central radius of curvature of the object-side surface of the first lens L1 as R1, and the central radius of curvature of the image-side surface of the first lens L1 as R2, satisfying the following relationship: -3.73 ≤ (R1 + R2) / (R1 - R2) ≤ -0.88. By reasonably controlling the shape of the first lens L1, it can effectively correct the spherical aberration of the system. Preferably, it satisfies -2.33 ≤ (R1 + R2) / (R1 - R2) ≤ -1.10.

[0054] The on-axis thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.05≤d1 / TTL≤0.15. Within the range of this condition, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.08≤d1 / TTL≤0.12.

[0055] In this embodiment, the object-side surface of the second lens L2 is convex near the axis, and the image-side surface is concave near the axis, thus the second lens L2 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0056] The central radius of curvature of the object-side surface of the second lens L2 is R3, and the central radius of curvature of the image-side surface of the second lens L2 is R4, satisfying the following relationship: 1.69≤(R3+R4) / (R3-R4)≤16.84, 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 2.70≤(R3+R4) / (R3-R4)≤13.47.

[0057] The axial thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.01≤d3 / TTL≤0.06. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.02≤d3 / TTL≤0.05.

[0058] In this embodiment, the object-side surface of the third lens L3 is convex near the axis, and the image-side surface is concave near the axis, thus the third lens L3 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions, and the third lens L3 can also have positive refractive power.

[0059] The focal length of the camera optical lens 10 is defined as f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: -33.28 ≤ f3 / f ≤ 17.98. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -20.80 ≤ f3 / f ≤ 14.39 is satisfied.

[0060] 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: -19.66≤(R5+R6) / (R5-R6)≤15.01. 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 -12.29≤(R5+R6) / (R5-R6)≤12.01.

[0061] The on-axis thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.01≤d5 / TTL≤0.05. Within the range of this condition, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.02≤d5 / TTL≤0.04.

[0062] In this embodiment, the object-side surface of the fourth lens L4 is convex near the axis, and the image-side surface is also convex near the axis, thus the fourth lens L4 has positive refractive power. In other optional embodiments, the object-side surface and image-side surface of the fourth lens L4 may also be configured with other concave and convex distributions.

[0063] The focal length of the camera optical lens 10 is defined as f, and the focal length of the fourth lens L4 is defined as f4, satisfying the following relationship: 1.73≤f4 / f≤5.79. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 2.77≤f4 / f≤4.63.

[0064] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d7 / TTL≤0.11. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d7 / TTL≤0.08.

[0065] In this embodiment, the object-side surface of the fifth lens L5 is convex near the axis, and the image-side surface is concave near the axis, thus the fifth lens L5 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions, and the fifth lens L5 can also have positive refractive power.

[0066] The focal length of the camera optical lens 10 is defined as f, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: -20.63 ≤ f5 / f ≤ 121.56. Limiting the fifth lens L5 effectively makes the light angle of the camera optical lens 10 smoother and reduces tolerance sensitivity. Preferably, it satisfies -12.89 ≤ f5 / f ≤ 97.25.

[0067] The fifth lens L5 has an on-axis thickness of d9, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.01≤d9 / TTL≤0.08. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.02≤d9 / TTL≤0.07.

[0068] In this embodiment, the object-side surface of the sixth lens L6 is concave near the axis, and the image-side surface is convex near the axis, thus the sixth lens L6 has positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the sixth lens L6 can also be configured with other concave and convex distributions, and the sixth lens L6 can also have negative refractive power.

[0069] The focal length of the camera optical lens 10 is defined as f, and the focal length of the sixth lens L6 is defined as f6, satisfying the following relationship: -40.60 ≤ f6 / f ≤ 2.50. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -25.37 ≤ f6 / f ≤ 2.00 is satisfied.

[0070] The axial thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d11 / TTL≤0.17. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.05≤d11 / TTL≤0.14.

[0071] In this embodiment, the object-side surface of the seventh lens L7 is convex near the axis, and the image-side surface is concave near the axis, thus the seventh lens L7 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the seventh lens L7 can also be configured with other concave and convex distributions, and the seventh lens L7 can also have positive refractive power.

[0072] The focal length of the camera optical lens 10 is defined as f, and the focal length of the seventh lens L7 is defined as f7, satisfying the following relationship: -23.52 ≤ f7 / f ≤ 681.13. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -14.70 ≤ f7 / f ≤ 544.90 is satisfied.

[0073] 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: 4.36≤(R13+R14) / (R13-R14)≤54.25. This 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 6.98≤(R13+R14) / (R13-R14)≤43.40.

[0074] The axial thickness of the seventh lens L7 is d13, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d13 / TTL≤0.15. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d13 / TTL≤0.12.

[0075] In this embodiment, the object-side surface of the eighth lens L8 is convex near the axis, and the image-side surface is concave near the axis, thus the eighth lens L8 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the eighth lens L8 can also be configured with other concave and convex distributions, and the eighth lens L8 can also have positive refractive power.

[0076] The focal length of the camera optical lens 10 is defined as f, and the focal length of the eighth lens L8 is defined as f8, satisfying the following relationship: -2.36 ≤ f8 / f ≤ 382.25. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -1.48 ≤ f8 / f ≤ 265.80 is satisfied.

[0077] The central radius of curvature of the object-side surface of the eighth lens L8 is R15, and the central radius of curvature of the image-side surface of the eighth lens L8 is R16, satisfying the following relationship: 0.99≤(R15+R16) / (R15-R16)≤17.17. This defines the shape of the eighth lens, and 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 1.59≤(R15+R16) / (R15-R16)≤13.74.

[0078] The axial thickness of the eighth lens L8 is d15, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d15 / TTL≤0.23. Within the range of the condition, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d15 / TTL≤0.18.

[0079] In this embodiment, the image height of the camera optical lens 10 is IH, the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: TTL / IH≤1.39, which is beneficial for achieving ultra-thinness. Preferably, TTL / IH≤1.35 is satisfied.

[0080] In this embodiment, the field of view (FOV) of the camera optical lens 10 is greater than or equal to 85.00°, thereby achieving wide-angle viewing.

[0081] In this embodiment, the aperture value FNO of the camera optical lens 10 is less than or equal to 1.78, thereby achieving a large aperture and good imaging performance. Preferably, the aperture value FNO of the camera optical lens 10 is less than or equal to 1.75.

[0082] The camera optical lens 10 has 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 lens 10, it is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0083] The camera optical lens 10 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.

[0084] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0085] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0086] Preferably, the object side and / or image side of the lens may also be provided with inflection points and / or stagnation points to meet the requirements of high-quality imaging. Specific implementation schemes are described below.

[0087] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0088] Table 1

[0089]

[0090] The meanings of each symbol are as follows.

[0091] S1: Aperture;

[0092] R: Radius of curvature at the center of the optical surface;

[0093] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0094] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0095] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0096] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0097] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0098] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0099] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0100] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0101] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0102] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0103] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0104] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0105] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0106] R14: The central radius of curvature of the image-side surface of the seventh lens L7;

[0107] R15: The central radius of curvature of the object side surface of the eighth lens L8;

[0108] R16: The central radius of curvature of the image-side surface of the eighth lens L8;

[0109] R17: The center radius of curvature of the object side surface of the optical filter GF;

[0110] R18: Radius of curvature of the center of the image side of the optical filter GF;

[0111] d: Axial thickness of the lens, axial distance between lenses;

[0112] d0: The axial distance from aperture S1 to the object-side surface of the first lens L1;

[0113] d1: On-axis thickness of the first lens L1;

[0114] 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;

[0115] d3: On-axis thickness of the second lens L2;

[0116] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0117] d5: On-axis thickness of the third lens L3;

[0118] 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;

[0119] d7: On-axis thickness of the fourth lens L4;

[0120] d8: The axial distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0121] d9: On-axis thickness of the fifth lens L5;

[0122] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0123] d11: On-axis thickness of the sixth lens L6;

[0124] d12: The on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0125] d13: On-axis thickness of the seventh lens L7;

[0126] d14: The on-axis distance from the image-side surface of the seventh lens L7 to the object-side surface of the eighth lens L8;

[0127] d15: On-axis thickness of the eighth lens L8;

[0128] d16: The axial distance from the image-side surface of the eighth lens L8 to the object-side surface of the optical filter GF;

[0129] d17: On-axis thickness of the optical filter GF;

[0130] d18: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0131] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0132] nd1: The refractive index of the d-line of the first lens L1;

[0133] nd2: The refractive index of the d-line of the second lens L2;

[0134] nd3: The refractive index of the d-line of the third lens L3;

[0135] nd4: The refractive index of the d-line of the fourth lens L4;

[0136] nd5: The refractive index of the d-line of the fifth lens L5;

[0137] nd6: The refractive index of the d-line of the sixth lens L6;

[0138] nd7: The refractive index of the d-line of the seventh lens L7;

[0139] nd8: The refractive index of the d-line of the eighth lens L8;

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

[0141] vd: Abbe number;

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

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

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

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

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

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

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

[0149] v8: Abbe number of the eighth lens L8;

[0150] vg: Abbe number of the optical filter GF.

[0151] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0152] Table 2

[0153]

[0154]

[0155] 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).

[0156] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0157] 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).

[0158] 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; P7R1 and P7R2 represent the object-side and image-side surfaces of the seventh lens L7, respectively; and P8R1 and P8R2 represent the object-side and image-side surfaces of the eighth lens L8, respectively. The data in the "Inflection Point Position" column corresponds to 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.

[0159] Table 3

[0160]

[0161] Table 4

[0162]

[0163]

[0164] Figure 2 , Figure 3 A schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm, and 430nm passes through the camera optical lens 10 of the first embodiment are shown respectively. 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.

[0165] Table 25, 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, fourth, and fifth embodiments.

[0166] As shown in Table 25, the first embodiment satisfies all the conditional expressions.

[0167] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 4.369 mm, the full field of view (IH) is 7.150 mm, and the field of view (FOV) in the diagonal direction is 85.40°. 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.

[0168] (Second Implementation)

[0169] The second implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0170] The object-side surface of the sixth lens L6 is convex at the paraxial position, and the image-side surface of the sixth lens L6 is concave at the paraxial position. The sixth lens L6 has negative refractive power, the seventh lens L7 has positive refractive power, and the eighth lens L8 has positive refractive power.

[0171] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0172] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0173] Table 5

[0174]

[0175] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0176] Table 6

[0177]

[0178]

[0179] 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.

[0180] Table 7

[0181]

[0182]

[0183] Table 8

[0184] Number of outposts Location 1 Station location 2 Location 3 P1R1 0 / / / P1R2 0 / / / P2R1 0 / / / P2R2 0 / / / P3R1 2 1.195 1.585 / P3R2 1 1.085 / / P4R1 1 0.885 / / P4R2 0 / / / P5R1 1 0.355 / / P5R2 1 0.695 / / P6R1 1 0.055 / / P6R2 1 0.245 / / P7R1 1 2.405 / / P7R2 1 3.775 / / P8R1 2 6.065 6.525 / P8R2 3 2.965 4.975 6.635

[0185] Figure 6 , Figure 7A schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm, and 430nm passes through the camera optical lens 20 of the second embodiment are shown respectively. 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.

[0186] As shown in Table 25, the second embodiment satisfies all the conditional expressions.

[0187] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 20 is 4.354 mm, the full field of view (IH) is 7.150 mm, and the field of view (FOV) in the diagonal direction is 85.60°. 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.

[0188] (Third Implementation)

[0189] The third implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0190] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0191] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0192] Table 9

[0193]

[0194] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0195] Table 10

[0196]

[0197]

[0198] 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.

[0199] Table 11

[0200]

[0201]

[0202] Table 12

[0203] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 0 / / P2R1 0 / / P2R2 0 / / P3R1 2 1.015 1.695 P3R2 2 1.165 1.795 P4R1 1 0.105 / P4R2 0 / / P5R1 1 0.705 / P5R2 1 0.965 / P6R1 0 / / P6R2 0 / / P7R1 1 2.165 / P7R2 1 3.315 / P8R1 1 0.805 / P8R2 1 2.275 /

[0204] Figure 10 , Figure 11 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 430nm 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.

[0205] Table 25 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 30 of this embodiment satisfies the above-described conditional expressions.

[0206] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 30 is 4.369 mm, the full field of view (IH) is 7.150 mm, and the field of view (FOV) in the diagonal direction is 85.40°. 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.

[0207] (Fourth Implementation)

[0208] The fourth implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0209] The object-side surface of the fifth lens L5 is concave near the axis, and the image-side surface of the fifth lens L5 is convex near the axis. The fifth lens L5 has positive refractive power.

[0210] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0211] Tables 13 and 14 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0212] Table 13

[0213]

[0214] Table 14 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0215] Table 14

[0216]

[0217]

[0218] 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.

[0219] Table 15

[0220] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 Recurve point position 4 P1R1 0 / / / / P1R2 1 2.025 / / / P2R1 1 1.985 / / / P2R2 1 1.815 / / / P3R1 3 0.535 1.545 1.785 / P3R2 2 0.755 1.495 / / P4R1 2 0.105 1.855 / / P4R2 0 / / / / P5R1 0 / / / / P5R2 1 2.305 / / / P6R1 1 3.035 / / / P6R2 2 2.625 2.995 / / P7R1 2 1.285 3.525 / / P7R2 2 1.785 5.595 / / P8R1 4 0.555 2.235 4.055 5.535 P8R2 4 0.985 3.695 4.735 5.875

[0221] Table 16

[0222] Number of outposts Location 1 Station location 2 Location 3 Station location 4 P1R1 0 / / / / P1R2 0 / / / / P2R1 0 / / / / P2R2 0 / / / / P3R1 1 0.925 / / / P3R2 0 / / / / P4R1 1 0.185 / / / P4R2 0 / / / / P5R1 0 / / / / P5R2 0 / / / / P6R1 0 / / / / P6R2 0 / / / / P7R1 1 2.315 / / / P7R2 1 3.655 / / / P8R1 4 1.015 3.545 4.465 6.405 P8R2 2 2.425 6.605 / /

[0223] Figure 14 , Figure 15 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 430nm 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.

[0224] Table 25 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 40 of this embodiment satisfies the above-described conditional expressions.

[0225] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 40 is 4.369 mm, the full field of view (IH) is 7.150 mm, and the field of view (FOV) in the diagonal direction is 85.40°. 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.

[0226] (Fifth Implementation)

[0227] The fifth embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0228] The third lens L3 has positive refractive power.

[0229] Figure 17 The image shown is a camera optical lens 50 according to the fifth embodiment of the present invention.

[0230] Tables 17 and 18 show the design data of the camera optical lens 50 according to the fifth embodiment of the present invention.

[0231] Table 17

[0232]

[0233]

[0234] Table 18 shows the aspherical data of each lens in the camera optical lens 50 of the fifth embodiment of the present invention.

[0235] Table 18

[0236]

[0237]

[0238] Tables 19 and 20 show the inflection point and stagnation point design data of each lens in the camera optical lens 50 of the fifth embodiment of the present invention.

[0239] Table 19

[0240]

[0241] Table 20

[0242]

[0243]

[0244] Figure 18 , Figure 19 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 430nm passes through the camera optical lens 50 of the fifth 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 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.

[0245] Table 25 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 50 of this embodiment satisfies the above-described conditional expressions.

[0246] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 50 is 4.369 mm, the full field of view (IH) is 7.150 mm, and the field of view (FOV) in the diagonal direction is 85.40°. 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.

[0247] (Comparative Implementation Methods)

[0248] The symbols in the comparative implementation method have the same meanings as those in the first implementation method; only the differences are listed below.

[0249] The third lens L3 has positive refractive power.

[0250] Figure 21 The image shows a camera optical lens 60 according to a comparative embodiment.

[0251] Tables 21 and 22 show the design data of the camera optical lens 60 of the comparative embodiment.

[0252] Table 21

[0253]

[0254]

[0255] Table 22 shows the aspherical data of each lens in the camera optical lens 60 of the comparative embodiment.

[0256] Table 22

[0257]

[0258]

[0259] Tables 23 and 24 show the inflection point and stagnation point design data of each lens in the camera optical lens 60 of the comparative embodiment.

[0260] Table 23

[0261]

[0262] Table 24

[0263]

[0264]

[0265] Figure 22 , Figure 23A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm, and 430nm passes through the camera optical lens 60 of the comparative embodiment. Figure 24 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 60 of the comparative embodiment. 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 25 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 -5.00≤f2 / f≤-1.50.

[0267] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 4.369mm, the full field of view image height IH is 7.150mm, and the diagonal field of view FOV is 85.00°. The camera optical lens 60 cannot simultaneously meet the design requirements of large aperture, wide angle, and ultra-thinness.

[0268] Table 25

[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, from the object side to the image side, sequentially comprises: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, a fifth lens with refractive power, a sixth lens with refractive power, a seventh lens with refractive power, and an eighth lens with refractive power; the object side of the fourth lens is convex at the paraxial position, and the image side of the fourth lens is convex at the paraxial position. Wherein, the focal length of the camera optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object-side surface of the fourth lens is R7, the central radius of curvature of the image-side surface of the fourth lens is R8, the central radius of curvature of the object-side surface of the fifth lens is R9, the central radius of curvature of the image-side surface of the fifth lens is R10, the focal length of the seventh lens is f7, the focal length of the eighth lens is f8, the focal length of the fourth lens is f4, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -5.00≤f² / f≤-1.50; -267.205≤R7 / R8≤-2.00; 2.00≤(R9+R10) / (R9-R10)≤12.00; 2.00≤f7 / f8≤10.00; 1.73≤f4 / f≤5.79; 0.03≤d7 / TTL≤0.

11.

2. The camera optical lens according to claim 1, characterized in that, The axial distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens is d10, and the axial distance from the image-side surface of the sixth lens to the object-side surface of the seventh lens is d12, satisfying the following relationship: d10 / d12≥2.

00.

3. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object side of the sixth lens is R11, and the central radius of curvature of the image side of the sixth lens is R12, and they satisfy the following relationship: 1.50≤R11 / R12≤30.

00.

4. The camera optical lens according to claim 1, characterized in that, The object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position. The 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: 0.45≤f1 / f≤1.63; -3.73≤(R1+R2) / (R1-R2)≤-0.88; 0.05≤d1 / TTL≤0.

15.

5. The camera optical lens according to claim 1, characterized in that, The object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position. The center radius of curvature of the object-side surface of the second lens is R3, the center radius of curvature of the image-side surface of the second lens is R4, and the axial thickness of the second lens is d3, satisfying the following relationship: 1.69≤(R3+R4) / (R3-R4)≤16.84; 0.01≤d3 / TTL≤0.

06.

6. The camera optical lens according to claim 1, characterized in that, The object-side surface of the third lens is convex at the paraxial position, and the image-side surface of the third lens is concave at the paraxial position. The focal length of the 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: -33.28≤f3 / f≤17.98; -19.66≤(R5+R6) / (R5-R6)≤15.01; 0.01≤d5 / TTL≤0.

05.

7. The camera optical lens according to claim 1, characterized in that, The fifth lens has a focal length of f5 and an on-axis thickness of d9, and satisfies the following relationship: -20.63≤f5 / f≤121.56; 0.01≤d9 / TTL≤0.

08.

8. The camera optical lens according to claim 1, characterized in that, The sixth lens has a focal length of f6 and an on-axis thickness of d11, and satisfies the following relationship: -40.60≤f6 / f≤2.50; 0.03≤d11 / TTL≤0.

17.

9. The camera optical lens according to claim 1, characterized in that, The object-side surface of the seventh lens is convex at the paraxial position, and the image-side surface of the seventh lens is concave at the paraxial position. The seventh lens has a focal length of f7, a central radius of curvature of the object-side surface of the seventh lens of R13, a central radius of curvature of the image-side surface of the seventh lens of R14, and an axial thickness of d13, and satisfies the following relationship: -23.52≤f7 / f≤681.13; 4.36≤(R13+R14) / (R13-R14)≤54.25; 0.02≤d13 / TTL≤0.

15.

10. The camera optical lens according to claim 1, characterized in that, The object-side surface of the eighth lens is convex at the paraxial position, and the image-side surface of the eighth lens is concave at the paraxial position. The eighth lens has a focal length of f8, a central radius of curvature of the object side of the eighth lens of R15, a central radius of curvature of the image side of the eighth lens of R16, and an axial thickness of d15, and satisfies the following relationship: -2.36≤f8 / f≤382.25; 0.99≤(R15+R16) / (R15-R16)≤17.17; 0.02≤d15 / TTL≤0.23.

Images