Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens, which is sequentially arranged from an object side to an image side as follows: a first lens with a negative refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein the camera optical lens has a field of view FOV, the fifth lens has a focal length f5, the sixth lens has a focal length f6, the axial distance from the image side surface of the second lens to the object side surface of the third lens is d4, the axial distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, and the following relationships are met: 100.00 DEG <= FOV <= 135.00 DEG; 0 < f5 / f6 <= 1.00; 1.20 <= d4 / d6 <= 10.00. The camera optical lens has good optical performance and meets the design requirements of wide-angle and ultra-thin.

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 possesses excellent optical performance while meeting the design requirements of wide-angle and ultra-thin design.

[0004] To solve the above-mentioned technical problems, embodiments of the present invention provide a camera optical lens, wherein the camera optical lens comprises, in sequence from the object side to the image side: a first lens having negative refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens;

[0005] Wherein, the field of view of the camera optical lens is FOV, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the axial distance from the image side of the second lens to the object side of the third lens is d4, the axial distance from the image side of the third lens to the object side of the fourth lens is d6, and the following relationship is satisfied:

[0006] 100.00°≤FOV≤135.00°;

[0007] 0 < f5 / f6 ≤ 1.00;

[0008] 1.20≤d4 / d6≤10.00.

[0009] Preferably, the central radius of curvature of the object-side surface of the sixth lens is R11, and the central radius of curvature of the image-side surface of the sixth lens is R12, satisfying the following relationship:

[0010] -5.00≤(R11+R12) / (R11-R12)≤-2.00.

[0011] Preferably, the object-side surface of the first lens is concave at the paraxial position, and the image-side surface of the first lens is convex at the paraxial position.

[0012] The focal length of the camera optical lens is f, 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, the axial thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

[0013] -40.96≤f1 / f≤-1.36;

[0014] -32.92≤(R1+R2) / (R1-R2)≤-1.14;

[0015] 0.02≤d1 / TTL≤0.08.

[0016] Preferably, the camera optical lens satisfies the following relationship:

[0017] -25.60≤f1 / f≤-1.71;

[0018] -20.57≤(R1+R2) / (R1-R2)≤-1.42;

[0019] 0.03≤d1 / TTL≤0.07.

[0020] 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 second lens has positive refractive power.

[0021] The focal length of the camera optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

[0022] 0.82≤f² / f≤3.27;

[0023] -6.77≤(R3+R4) / (R3-R4)≤-1.29;

[0024] 0.03≤d3 / TTL≤0.14.

[0025] Preferably, the camera optical lens satisfies the following relationship:

[0026] 1.32≤f² / f≤2.62;

[0027] -4.23≤(R3+R4) / (R3-R4)≤-1.61;

[0028] 0.05≤d3 / TTL≤0.11.

[0029] Preferably, the image-side surface of the third lens is convex at the paraxial position; the third lens has positive refractive power;

[0030] The focal length of the camera optical lens is f, the focal length of the third lens is f3, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, the axial thickness of the third lens is d5, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0031] 0.42≤f3 / f≤2.13;

[0032] 0.47≤(R5+R6) / (R5-R6)≤1.97;

[0033] 0.03≤d5 / TTL≤0.16.

[0034] Preferably, the camera optical lens satisfies the following relationship:

[0035] 0.68≤f³ / f≤1.70;

[0036] 0.75≤(R5+R6) / (R5-R6)≤1.58;

[0037] 0.05≤d5 / TTL≤0.13.

[0038] 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.

[0039] The focal length of the camera optical lens is f, the focal length of the fourth lens is f4, the central radius of curvature of the object side of the fourth lens is R7, the central radius of curvature of the image side of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0040] -2.90≤f4 / f≤57.00;

[0041] -178.82≤(R7+R8) / (R7-R8)≤-0.82;

[0042] 0.02≤d7 / TTL≤0.09.

[0043] Preferably, the camera optical lens satisfies the following relationship:

[0044] -1.81≤f4 / f≤45.60;

[0045] -111.76≤(R7+R8) / (R7-R8)≤-1.03;

[0046] 0.03≤d7 / TTL≤0.07.

[0047] Preferably, the object-side surface of the fifth lens is concave near the axis; the fifth lens has negative refractive power.

[0048] The focal length of the camera optical lens is f, 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 axial thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0049] -5.33≤f5 / f≤-1.11;

[0050] -2.45≤(R9+R10) / (R9-R10)≤0.02;

[0051] 0.02≤d9 / TTL≤0.09.

[0052] Preferably, the camera optical lens satisfies the following relationship:

[0053] -3.33≤f5 / f≤-1.39;

[0054] -1.53≤(R9+R10) / (R9-R10)≤0.02;

[0055] 0.03≤d9 / TTL≤0.07.

[0056] Preferably, the object-side surface of the sixth lens is concave near the axis, and the image-side surface of the sixth lens is convex near the axis; the sixth lens has negative refractive power.

[0057] The focal length of the camera optical lens is f, the on-axis thickness of the sixth lens is d11, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0058] -83.28≤f6 / f≤-1.70;

[0059] 0.03≤d11 / TTL≤0.18.

[0060] Preferably, the camera optical lens satisfies the following relationship:

[0061] -52.05≤f6 / f≤-2.12;

[0062] 0.05≤d11 / TTL≤0.15.

[0063] 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 convex at the paraxial position; the seventh lens has positive refractive power.

[0064] The focal length of the camera optical lens is f, the focal length of the seventh lens is f7, the central radius of curvature of the object side of the seventh lens is R13, the central radius of curvature of the image side of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

[0065] 0.29≤f7 / f≤1.48;

[0066] -0.03≤(R13+R14) / (R13-R14)≤0.92;

[0067] 0.04≤d13 / TTL≤0.16.

[0068] Preferably, the camera optical lens satisfies the following relationship:

[0069] 0.47≤f7 / f≤1.18;

[0070] -0.02≤(R13+R14) / (R13-R14)≤0.74;

[0071] 0.07≤d13 / TTL≤0.13.

[0072] 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 eighth lens has negative refractive power.

[0073] The focal length of the camera optical lens is f, the focal length of the eighth lens is f8, the central radius of curvature of the object side of the eighth lens is R15, the central radius of curvature of the image side of the eighth lens is R16, the axial thickness of the eighth lens is d15, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0074] -3.42≤f8 / f≤-0.50;

[0075] 1.22≤(R15+R16) / (R15-R16)≤5.81;

[0076] 0.03≤d15 / TTL≤0.13.

[0077] Preferably, the camera optical lens satisfies the following relationship:

[0078] -2.14≤f8 / f≤-0.62;

[0079] 1.95≤(R15+R16) / (R15-R16)≤4.65;

[0080] 0.04≤d15 / TTL≤0.10.

[0081] Preferably, the image height of the camera optical lens is IH, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0082] TTL / IH≤1.92.

[0083] Preferably, the aperture value FNO of the camera optical lens is less than or equal to 2.27.

[0084] 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 wide-angle and ultra-thin, 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

[0085] 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:

[0086] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0087] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0088] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for the camera optical lens shown;

[0089] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0090] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0091] Figure 6 yes Figure 5A schematic diagram of axial aberrations of the camera optical lens shown;

[0092] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0093] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0094] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0095] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0096] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0097] Figure 12 yes Figure 9 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0098] 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.

[0099] (First Implementation)

[0100] 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: a first lens L1, a second lens L2, an aperture S1, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. An optical filter GF or other optical element may be disposed between the eighth lens L8 and the image plane S1.

[0101] 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.

[0102] In this embodiment, the field of view of the camera optical lens 10 is defined as FOV, which satisfies the following relationship: 100.00°≤FOV≤135.00°, which specifies the range of the field of view. The camera optical lens 10 that satisfies the relationship has a wide-angle feature.

[0103] The focal length of the fifth lens L5 is defined as f5, and the focal length of the sixth lens L6 is defined as f6, satisfying the following relationship: 0 < f5 / f6 ≤ 1.00. This specifies the ratio of the focal length f5 of the fifth lens L5 to the focal length f6 of the sixth lens L6. Through the reasonable allocation of focal lengths, the camera optical lens 10 has better imaging quality and lower sensitivity.

[0104] The axial distance from the image side of the second lens L2 to the object side of the third lens L3 is defined as d4, and 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, satisfying the following relationship: 1.20≤d4 / d6≤10.00. This specifies the ratio of the axial distance d4 from the image side of the second lens L2 to the object side of the third lens L3 to the axial distance d6 from the image side of the third lens L3 to the object side of the fourth lens L4. Within the range of this relationship, it helps to compress the overall length of the optical system and achieve an ultra-thin effect.

[0105] The central radius of curvature of the object side of the sixth lens L6 is defined as R11, and the central radius of curvature of the image side of the sixth lens L6 is defined as R12, and the following relationship is satisfied: -5.00≤(R11+R12) / (R11-R12)≤-2.00. This defines the shape of the sixth lens L6, which, within the specified range, can mitigate the degree of light deflection after passing through the lens and effectively reduce aberrations.

[0106] In this embodiment, the object-side surface of the first lens L1 is concave near the axis, and its image-side surface is convex near the axis, thus the first lens L1 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the first lens L1 can also be configured with other concave and convex distributions.

[0107] The focal length of the camera optical lens 10 is defined as f, and the focal length of the first lens L1 is defined as f1, satisfying the following relationship: -40.96 ≤ f1 / f ≤ -1.36. This specifies the ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens 10. When 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, -25.60 ≤ f1 / f ≤ -1.71 is satisfied.

[0108] 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: -32.92≤(R1+R2) / (R1-R2)≤-1.14. By reasonably controlling the shape of the first lens L1, it can effectively correct the spherical aberration of the system. Preferably, it satisfies -20.57≤(R1+R2) / (R1-R2)≤-1.42.

[0109] The axial thickness of the first lens L1 is defined as d1, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d1 / TTL≤0.08. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d1 / TTL≤0.07.

[0110] In this embodiment, the object-side surface of the second lens L2 is convex near the axis, and its image-side surface is concave near the axis, thus the second lens L2 has positive 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, and the second lens L2 can also have negative refractive power.

[0111] The focal length of the camera optical lens 10 is f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: 0.82≤f2 / f≤3.27. By controlling the positive optical power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the optical system. Preferably, it satisfies 1.32≤f2 / f≤2.62.

[0112] The central radius of curvature of the object-side surface of the second lens L2 is defined as R3, and the central radius of curvature of the image-side surface of the second lens L2 is defined as R4, satisfying the following relationship: -6.77≤(R3+R4) / (R3-R4)≤-1.29. This defines the shape of the second lens L2. 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 -4.23≤(R3+R4) / (R3-R4)≤-1.61.

[0113] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the second lens L2 is defined as d3, satisfying the following relationship: 0.03≤d3 / TTL≤0.14. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.05≤d3 / TTL≤0.11.

[0114] In this embodiment, the object-side surface of the third lens L3 is convex near the axis, and its image-side surface is also convex near the axis, thus the third lens L3 has positive refractive power. In other optional embodiments, the object-side surface and image-side surface of the third lens L3 can also be configured with other concave and convex distributions, and the third lens L3 can also have negative refractive power.

[0115] The focal length of the camera optical lens 10 is f, and the focal length of the third lens L3 is f3, satisfying the following relationship: 0.42≤f3 / f≤2.13. Through the reasonable allocation of optical power, the camera optical lens 10 has better imaging quality and lower sensitivity. Preferably, it satisfies 0.68≤f3 / f≤1.70.

[0116] The central radius of curvature of the object-side surface of the third lens L3 is defined as R5, and the central radius of curvature of the image-side surface of the third lens L3 is defined as R6, satisfying the following relationship: 0.47 ≤ (R5 + R6) / (R5 - R6) ≤ 1.97. This defines the shape of the third lens L3, which is beneficial for its shaping. Within the specified range of the relationship, it can mitigate the degree of light refraction after passing through the lens and effectively reduce aberrations. Preferably, it satisfies 0.75 ≤ (R5 + R6) / (R5 - R6) ≤ 1.58.

[0117] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the third lens L3 is defined as d5, satisfying the following relationship: 0.03≤d5 / TTL≤0.16. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.05≤d5 / TTL≤0.13.

[0118] In this embodiment, the object-side surface of the fourth lens L4 is concave near the axis, and its image-side surface is convex near the axis, thus the fourth lens L4 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave and convex distributions, and the fourth lens L4 can also have positive refractive power.

[0119] The focal length of the camera optical lens 10 is f, and the focal length of the fourth lens L4 is f4, satisfying the following relationship: -2.90≤f4 / f≤57.00. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -1.81≤f4 / f≤45.60.

[0120] The central radius of curvature of the object-side surface of the fourth lens L4 is defined as R7, and the central radius of curvature of the image-side surface of the fourth lens L4 is defined as R8, satisfying the following relationship: -178.82≤(R7+R8) / (R7-R8)≤-0.82. 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 -111.76≤(R7+R8) / (R7-R8)≤-1.03.

[0121] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the fourth lens L4 is defined as d7, satisfying the following relationship: 0.02≤d7 / TTL≤0.09. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d7 / TTL≤0.07.

[0122] In this embodiment, the object-side surface of the fifth lens L5 is concave near the axis, and its image-side surface is convex 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.

[0123] The focal length of the camera optical lens 10 is f, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: -5.33≤f5 / f≤-1.11. 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 -3.33≤f5 / f≤-1.39.

[0124] The central radius of curvature of the object-side surface of the fifth lens L5 is defined as R9, and the central radius of curvature of the image-side surface of the fifth lens L5 is defined as R10, satisfying the following relationship: -2.45≤(R9+R10) / (R9-R10)≤0.02. This defines the shape of the fifth lens L5, which, within the specified range, is beneficial for correcting aberrations in off-axis drawing angles as ultra-thin and wide-angle lenses develop. Preferably, it satisfies -1.53≤(R9+R10) / (R9-R10)≤0.02.

[0125] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the fifth lens L5 is defined as d9, satisfying the following relationship: 0.02≤d9 / TTL≤0.09. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d9 / TTL≤0.07.

[0126] In this embodiment, the object-side surface of the sixth lens L6 is concave near the axis, and its image-side surface is convex near the axis, thus the sixth lens L6 has negative 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 positive refractive power.

[0127] The focal length of the camera optical lens 10 is f, and the focal length of the sixth lens L6 is defined as f6, satisfying the following relationship: -83.28 ≤ f6 / f ≤ -1.70. Through reasonable allocation of optical power, the camera optical lens 10 has better imaging quality and lower sensitivity. Preferably, it satisfies -52.05 ≤ f6 / f ≤ -2.12.

[0128] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the sixth lens L6 is defined as d11, satisfying the following relationship: 0.03≤d11 / TTL≤0.18. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.05≤d11 / TTL≤0.15.

[0129] In this embodiment, the object-side surface of the seventh lens L7 is convex near the axis, and its image-side surface is also convex near the axis, thus the seventh lens L7 has positive refractive power. In other optional embodiments, the object-side surface and image-side surface of the seventh lens L7 can also be configured with other concave and convex distributions, and the seventh lens L7 can also have negative refractive power.

[0130] The focal length of the camera optical lens 10 is f, and the focal length of the seventh lens L7 is defined as f7, satisfying the following relationship: 0.29≤f7 / f≤1.48. Through reasonable allocation of optical power, the camera optical lens 10 has better imaging quality and lower sensitivity. Preferably, it satisfies 0.47≤f7 / f≤1.18.

[0131] The central radius of curvature of the object-side surface of the seventh lens L7 is defined as R13, and the central radius of curvature of the image-side surface of the seventh lens L7 is defined as R14, satisfying the following relationship: -0.03≤(R13+R14) / (R13-R14)≤0.92. 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 -0.02≤(R13+R14) / (R13-R14)≤0.74.

[0132] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the seventh lens L7 is defined as d13, satisfying the following relationship: 0.04≤d13 / TTL≤0.16. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.07≤d13 / TTL≤0.13.

[0133] In this embodiment, the object-side surface of the eighth lens L8 is convex near the axis, and its 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.

[0134] The focal length of the camera optical lens 10 is f, and the focal length of the eighth lens L8 is defined as f8, satisfying the following relationship: -3.42≤f8 / f≤-0.50. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -2.14≤f8 / f≤-0.62.

[0135] The central radius of curvature of the object-side surface of the eighth lens L8 is defined as R15, and the central radius of curvature of the image-side surface of the eighth lens L8 is defined as R16, satisfying the following relationship: 1.22≤(R15+R16) / (R15-R16)≤5.81. This defines the shape of the eighth lens, and within the specified range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 1.95≤(R15+R16) / (R15-R16)≤4.65.

[0136] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the eighth lens L8 is defined as d15, satisfying the following relationship: 0.03≤d15 / TTL≤0.13. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d15 / TTL≤0.10.

[0137] 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≤1.92, which is beneficial to achieving ultra-thinness.

[0138] In this embodiment, the aperture value FNO of the camera optical lens 10 is less than or equal to 2.27, 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 2.22.

[0139] The camera optical lens 10 has good optical performance while meeting the design requirements of 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.

[0140] 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.

[0141] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image surface Si), in mm;

[0142] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0143] 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. Specific possible implementation schemes are described below.

[0144] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0145] Table 1

[0146]

[0147] The meanings of each symbol are as follows.

[0148] S1: Aperture;

[0149] R: Radius of curvature at the center of the optical surface;

[0150] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0151] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0152] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0153] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0154] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0155] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0156] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0157] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0158] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0159] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0160] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0161] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0162] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0163] R14: The central radius of curvature of the image-side surface of the seventh lens L7;

[0164] R15: The central radius of curvature of the object side surface of the eighth lens L8;

[0165] R16: The central radius of curvature of the image-side surface of the eighth lens L8;

[0166] R17: The center radius of curvature of the object side surface of the optical filter GF;

[0167] R18: Radius of curvature of the center of the image side of the optical filter GF;

[0168] d: Axial thickness of the lens, axial distance between lenses;

[0169] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0170] d1: On-axis thickness of the first lens L1;

[0171] 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;

[0172] d3: On-axis thickness of the second lens L2;

[0173] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0174] d5: On-axis thickness of the third lens L3;

[0175] 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;

[0176] d7: On-axis thickness of the fourth lens L4;

[0177] 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;

[0178] d9: On-axis thickness of the fifth lens L5;

[0179] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0180] d11: On-axis thickness of the sixth lens L6;

[0181] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0182] d13: On-axis thickness of the seventh lens L7;

[0183] d14: The axial distance from the image-side surface of the seventh lens L7 to the object-side surface of the eighth lens L8;

[0184] d15: On-axis thickness of the eighth lens L8;

[0185] d16: The axial distance from the image-side surface of the eighth lens L8 to the object-side surface of the optical filter GF;

[0186] d17: On-axis thickness of the optical filter GF;

[0187] d18: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0188] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0189] nd1: The refractive index of the d-line of the first lens L1;

[0190] nd2: The refractive index of the d-line of the second lens L2;

[0191] nd3: The refractive index of the d-line of the third lens L3;

[0192] nd4: The refractive index of the d-line of the fourth lens L4;

[0193] nd5: The refractive index of the d-line of the fifth lens L5;

[0194] nd6: The refractive index of the d-line of the sixth lens L6;

[0195] nd7: The refractive index of the d-line of the seventh lens L7;

[0196] nd8: The refractive index of the d-line of the eighth lens L8;

[0197] ndg: The refractive index of the d-line of the optical filter GF;

[0198] vd: Abbe number;

[0199] v1: Abbe number of the first lens L1;

[0200] v2: Abbe number of the second lens L2;

[0201] v3: Abbe number of the third lens L3;

[0202] v4: Abbe number of the fourth lens L4;

[0203] v5: Abbe number of the fifth lens L5;

[0204] v6: Abbe number of the sixth lens L6;

[0205] v7: Abbe number of the seventh lens L7;

[0206] v8: Abbe number of the eighth lens L8;

[0207] vg: Abbe number of the optical filter GF.

[0208] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0209] Table 2

[0210]

[0211]

[0212] 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).

[0213] 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 (1)

[0214] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and a tangent plane at the vertex of the aspheric optical axis).

[0215] 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.

[0216] Table 3

[0217]

[0218] Table 4

[0219]

[0220]

[0221] 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.

[0222] Table 13, which appears later, shows the values ​​corresponding to the parameters specified in the numerical values ​​and relationships in each of the first, second, and third embodiments.

[0223] As shown in Table 13, the first embodiment satisfies all the relations.

[0224] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 1.720mm, the full field of view image height IH is 4.032mm, and the field of view FOV in the diagonal direction is 100.00°. The camera optical lens 10 meets the design requirements of wide-angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0225] (Second Implementation)

[0226] 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.

[0227] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0228] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0229] Table 5

[0230]

[0231] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0232] Table 6

[0233]

[0234]

[0235] 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.

[0236] Table 7

[0237]

[0238]

[0239] Table 8

[0240] Number of outposts Location 1 Station location 2 P1R1 1 1.335 / P1R2 1 0.965 / P2R1 0 / / P2R2 0 / / P3R1 1 0.215 / P3R2 0 / / P4R1 0 / / P4R2 0 / / P5R1 0 / / P5R2 0 / / P6R1 0 / / P6R2 0 / / P7R1 1 1.535 / P7R2 2 0.565 1.885 P8R1 1 1.825 / P8R2 1 2.045 /

[0241] 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 8This 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.

[0242] As shown in Table 13, the second embodiment satisfies all the relationships.

[0243] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 1.442 mm, the full field of view image height IH is 4.032 mm, and the field of view FOV in the diagonal direction is 104.60°. The camera optical lens 20 meets the design requirements of wide-angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0244] (Third Implementation)

[0245] 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.

[0246] The object-side surface of the third lens L3 is concave near the axis; the image-side surface of the fifth lens L5 is concave near the axis; and the fourth lens L4 has positive refractive power.

[0247] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0248] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0249] Table 9

[0250]

[0251] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0252] Table 10

[0253]

[0254] 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.

[0255] Table 11

[0256]

[0257]

[0258] Table 12

[0259] Number of outposts Location 1 Station location 2 P1R1 1 0.685 / P1R2 1 0.245 / P2R1 0 / / P2R2 1 0.545 / P3R1 0 / / P3R2 0 / / P4R1 0 / / P4R2 0 / / P5R1 0 / / P5R2 1 0.615 / P6R1 2 0.155 0.505 P6R2 2 0.075 0.425 P7R1 1 0.755 / P7R2 0 / / P8R1 1 1.045 / P8R2 1 1.425 /

[0260] 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.

[0261] Table 13 below lists the values ​​of each relation in this embodiment according to the above-described relationships. Clearly, the camera optical lens 30 of this embodiment satisfies the above-described relationships.

[0262] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 0.818 mm, the full field of view image height IH is 2.902 mm, and the field of view FOV in the diagonal direction is 133.00°. The camera optical lens 30 meets the design requirements of wide-angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0263] Table 13

[0264] Parameters and Relationships Example 1 Example 2 Example 3 FOV 100.00° 104.60° 133.00° f5 / f6 1.00 0.42 0.04 d4 / d6 9.97 5.55 1.25 f 3.441 3.173 1.802 f1 -33.365 -64.985 -3.687 f2 5.665 6.295 3.934 f3 2.921 3.038 2.558 f4 -4.497 -4.596 68.470 f5 -8.727 -8.461 -2.999 f6 -8.753 -20.387 -75.033 f7 2.007 2.387 1.774 f8 -2.559 -3.438 -3.078 FNO 2.00 2.20 2.20 TTL 5.586 5.860 5.556 IH 4.032 4.032 2.902

[0265] 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 lenses, from the object side to the image side, are in the following order: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens with negative refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power, and an eighth lens with negative refractive power. Wherein, the field of view of the camera optical lens is FOV, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the axial distance from the image-side surface of the second lens to the object-side surface of the third lens is d4, the axial distance from the image-side surface of the third lens to the object-side surface of the fourth lens is d6, the central radius of curvature of the object-side surface of the sixth lens is R11, and the central radius of curvature of the image-side surface of the sixth lens is R12, and the following relationship is satisfied: 100.00°≤FOV≤135.00°; 0 < f5 / f6 ≤ 1.00; 1.20≤d4 / d6≤10.00; -5.00≤(R11+R12) / (R11-R12)≤-2.

00.

2. The camera optical lens according to claim 1, characterized in that, The object-side surface of the first lens is concave at the paraxial position, and the image-side surface of the first lens is convex at the paraxial position. The focal length of the camera optical lens is f, 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, the axial thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -25.60≤f1 / f≤-1.71; -20.57≤(R1+R2) / (R1-R2)≤-1.42; 0.03≤d1 / TTL≤0.

07.

3. The camera optical lens according to claim 1, characterized in that, The object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position. The focal length of the camera optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 1.32≤f² / f≤2.62; -4.23≤(R3+R4) / (R3-R4)≤-1.61; 0.05≤d3 / TTL≤0.

11.

4. The camera optical lens according to claim 1, characterized in that, The image-side surface of the third lens is convex at the paraxial position; The focal length of the camera optical lens is f, the focal length of the third lens is f3, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, the axial thickness of the third lens is d5, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.68≤f³ / f≤1.70; 0.75≤(R5+R6) / (R5-R6)≤1.58; 0.05≤d5 / TTL≤0.

13.

5. The camera optical lens according to claim 1, characterized in that, 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 camera optical lens is f, the focal length of the fourth lens is f4, the central radius of curvature of the object side of the fourth lens is R7, the central radius of curvature of the image side of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -1.81≤f4 / f≤45.60; -111.76≤(R7+R8) / (R7-R8)≤-1.03; 0.03≤d7 / TTL≤0.

07.

6. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fifth lens is concave near the axis; The focal length of the camera optical lens is f, the central radius of curvature of the object side of the fifth lens is R9, the central radius of curvature of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -3.33≤f5 / f≤-1.39; -1.53≤(R9+R10) / (R9-R10)≤0.02; 0.03≤d9 / TTL≤0.

07.

7. The camera optical lens according to claim 1, characterized in that, The object-side surface of the sixth lens is concave near the axis, and the image-side surface of the sixth lens is convex near the axis. The focal length of the camera optical lens is f, the on-axis thickness of the sixth lens is d11, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -52.05≤f6 / f≤-2.12; 0.05≤d11 / TTL≤0.

15.

8. 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 convex at the paraxial position. The focal length of the camera optical lens is f, the focal length of the seventh lens is f7, the central radius of curvature of the object side of the seventh lens is R13, the central radius of curvature of the image side of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.47≤f7 / f≤1.18; -0.02≤(R13+R14) / (R13-R14)≤0.74; 0.07≤d13 / TTL≤0.

13.

9. 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 focal length of the camera optical lens is f, the focal length of the eighth lens is f8, the central radius of curvature of the object side of the eighth lens is R15, the central radius of curvature of the image side of the eighth lens is R16, the axial thickness of the eighth lens is d15, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -2.14≤f8 / f≤-0.62; 1.95≤(R15+R16) / (R15-R16)≤4.65; 0.04≤d15 / TTL≤0.

10.

10. The camera optical lens according to claim 1, characterized in that, The image height of the camera optical lens is IH, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 1.38≤TTL / IH ≤1.

92.

11. The camera optical lens according to claim 1, characterized in that, The aperture value FNO of the camera optical lens is greater than or equal to 2.0 and less than or equal to 2.27.

Images