Camera lens

Abstract

This invention relates to the field of optical lenses and discloses a camera optical lens comprising seven lenses, arranged sequentially from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens, a fourth lens, a fifth lens with positive refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The focal length of the camera optical lens is f, the focal length of the second lens is f2, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, satisfying the following relationships: -8.00≤f2 / f≤-2.50; 2.50≤(R5+R6) / (R5-R6)≤30.00; R8 / R7≤-1.50. The camera optical lens provided by this invention has good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thin design.

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 smartphones, the demand for miniaturized camera lenses has been increasing. The photosensitive devices of general camera lenses are nothing more than charge-coupled devices (CCD) or complementary metal-oxide semiconductor sensors (CMOS sensors). Due to the advancement of semiconductor manufacturing technology, the pixel size of photosensitive devices has been reduced. In addition, the current trend of electronic products is to have good functions and a thin and small shape. Therefore, miniaturized camera lenses with good image quality have become the mainstream in the market.

[0003] To achieve better image quality, traditional lenses used in mobile phone cameras often employ three-element, four-element, or even five-element or six-element lens structures. However, with technological advancements and increasing user demands, as the pixel area of ​​image sensors continues to shrink and system requirements for image quality rise, seven-element lens structures have gradually emerged in lens designs. While common seven-element lenses already possess good optical performance, their optical power, lens spacing, and lens shape still exhibit certain limitations. This results in the lens structure, while offering good optical performance, failing to meet the design requirements of large apertures, ultra-thin designs, and wide-angle lenses. [Summary of the Invention]

[0004] 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.

[0005] To solve the above-mentioned technical problems, the embodiments of the present invention provide a camera optical lens comprising seven lenses, wherein the seven lenses, from the object side to the image side, are in the following order: a first lens having positive refractive power, a second lens having negative refractive power, a third lens, a fourth lens, a fifth lens having positive refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power.

[0006] The focal length of the camera optical lens is f, the focal length of the second lens is f2, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, and they satisfy the following relationship:

[0007] -8.00≤f² / f≤-2.50;

[0008] 2.50≤(R5+R6) / (R5-R6)≤30.00;

[0009] R8 / R7≤-1.50.

[0010] Preferably, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the radius of curvature of the object-side surface of the seventh lens is R13, and the radius of curvature of the image-side surface of the seventh lens is R14, and they satisfy the following relationship:

[0011] 3.00≤f5 / f6≤8.00;

[0012] 2.00≤R14 / R13.

[0013] Preferably, the object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position; the focal length of the first lens is f1, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0014] 0.44≤f1 / f≤1.57;

[0015] -3.89≤(R1+R2) / (R1-R2)≤-1.00;

[0016] 0.07≤d1 / TTL≤0.22.

[0017] Preferably, the image-side surface of the second lens is concave near the axis, the radius of curvature of the object-side surface of the second lens is R3, the 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 imaging optical lens is TTL, and satisfies the following relationship:

[0018] 0.49≤(R3+R4) / (R3-R4)≤6.78;

[0019] 0.02≤d3 / TTL≤0.07.

[0020] Preferably, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0021] -86.98≤f3 / f≤1071.79;

[0022] 0.02≤d5 / TTL≤0.06.

[0023] Preferably, the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0024] -281.12≤f4 / f≤172.61;

[0025] -1.99≤(R7+R8) / (R7-R8)≤-0.15;

[0026] 0.03≤d7 / TTL≤0.10.

[0027] Preferably, the object-side surface of the fifth lens is convex at the paraxial position, and the image-side surface of the fifth lens is concave at the paraxial position; the focal length of the fifth lens is f5, the radius of curvature of the object-side surface of the fifth lens is R9, the radius of curvature of the image-side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0028] 2.35≤f5 / f≤15.17;

[0029] -11.48≤(R9+R10) / (R9-R10)≤-2.60;

[0030] 0.03≤d9 / TTL≤0.10.

[0031] Preferably, the object-side surface of the sixth lens is convex at the paraxial position, and the image-side surface of the sixth lens is concave at the paraxial position; the focal length of the sixth lens is f6, the radius of curvature of the object-side surface of the sixth lens is R11, the radius of curvature of the image-side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0032] 0.50≤f6 / f≤2.35;

[0033] -9.21≤(R11+R12) / (R11-R12)≤-2.57;

[0034] 0.02≤d11 / TTL≤0.08.

[0035] Preferably, the object-side surface of the seventh lens is concave at the paraxial position, and the image-side surface of the seventh lens is convex at the paraxial position; the focal length of the seventh lens is f7, the radius of curvature of the object-side surface of the seventh lens is R13, the 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 imaging optical lens is TTL, and satisfies the following relationship:

[0036] -2.06≤f7 / f≤-0.48;

[0037] -5.97≤(R13+R14) / (R13-R14)≤-0.67;

[0038] 0.03≤d13 / TTL≤0.13.

[0039] Preferably, at least one of the first lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is made of glass.

[0040] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has good optical performance and features large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. [Attached Image Description]

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying 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:

[0042] Figure 1 This is a schematic diagram of the camera optical lens according to Embodiment 1;

[0043] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0044] Figure 3 yes Figure 1 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0045] Figure 4 yes Figure 1 The diagram shows the field curvature and distortion of the camera lens.

[0046] Figure 5 This is a schematic diagram of the camera optical lens according to Embodiment 2;

[0047] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0048] Figure 7 yes Figure 5 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0049] Figure 8 yes Figure 5 The diagram shows the field curvature and distortion of the camera lens.

[0050] Figure 9 This is a schematic diagram of the camera optical lens according to embodiment three;

[0051] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0052] Figure 11 yes Figure 9 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0053] Figure 12 yes Figure 9 The diagram shows the field curvature and distortion of the camera lens.

[0054] Figure 13 This is a schematic diagram of the camera optical lens according to embodiment four;

[0055] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0056] Figure 15 yes Figure 13 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0057] Figure 16 yes Figure 13 The diagram shows the field curvature and distortion of the camera lens.

[0058] Figure 17 This is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0059] Figure 18 yes Figure 17 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0060] Figure 19 yes Figure 17 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0061] Figure 20 yes Figure 17 The diagram shows the field curvature and distortion of the camera lens.

Detailed Implementation Methods

[0062] 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.

[0063] (First Implementation)

[0064] Please refer 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 includes seven lenses. Specifically, the camera optical lens 10, from the object side to the image side, includes, in sequence: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as an optical filter GF may be disposed between the seventh lens L7 and the image plane S1.

[0065] In this embodiment, the first lens L1 is made of glass, the second lens L2 is made of plastic, the third lens L3 is made of glass, the fourth lens L4 is made of glass, the fifth lens L5 is made of glass, the sixth lens L6 is made of glass, and the seventh lens L7 is made of glass. In other optional embodiments, the lenses may be made of other materials.

[0066] 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: -8.00≤f2 / f≤-2.50; the ratio of the focal length of the second lens L2 to the total focal length of the system is specified, which can effectively balance the field curvature of the system and make the field curvature offset of the central field of view less than 0.01mm.

[0067] The radius of curvature of the object-side surface of the third lens L3 is defined as R5, and the radius of curvature of the image-side surface of the third lens L3 is defined as R6, satisfying the following relationship: 2.50≤(R5+R6) / (R5-R6)≤30.00. This defines the shape of the third lens L3, reducing the degree of light refraction and effectively correcting chromatic aberration, ensuring that the chromatic aberration |LC|≤2.0μm.

[0068] The radius of curvature of the object-side surface of the fourth lens L4 is defined as R7, and the radius of curvature of the image-side surface of the fourth lens L4 is defined as R8, satisfying the following relationship: R8 / R7 ≤ -1.50. Specifying the shape of the fourth lens L4 helps to correct astigmatism and distortion of the camera optical lens 10, ensuring that distortion |Distortion| ≤ 3.0% and reducing the possibility of vignetting.

[0069] 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: 3.00 ≤ f5 / f6 ≤ 8.00. The ratio of the focal lengths of the fifth lens L5 and the sixth lens L6 is specified. Through the reasonable allocation of focal lengths, the system achieves better imaging quality and lower sensitivity.

[0070] The radius of curvature of the object-side surface of the seventh lens L7 is defined as R13, and the radius of curvature of the image-side surface of the seventh lens L7 is defined as R14, satisfying the following relationship: 2.00 ≤ R14 / R13. This defines the shape of the seventh lens L7, which, within this conditional range, is beneficial for correcting aberrations at off-axis drawing angles.

[0071] 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.

[0072] The focal length of the first lens L1 is defined as f1, and the focal length of the imaging optical lens 10 is defined as f, satisfying the following relationship: 0.44 ≤ f1 / f ≤ 1.57. The ratio of the positive refractive power of the first lens L1 to the overall focal length is specified. Within the specified range, the first lens L1 has appropriate positive refractive power, which is beneficial for reducing system aberrations and also facilitates the development of ultra-thin and wide-angle lenses. Preferably, 0.70 ≤ f1 / f ≤ 1.25.

[0073] The radius of curvature of the object-side surface of the first lens L1 is defined as R1, and the radius of curvature of the image-side surface of the first lens L1 is defined as R2, satisfying the following relationship: -3.89 ≤ (R1 + R2) / (R1 - R2) ≤ -1.00; the shape of the first lens L1 is reasonably controlled so that the first lens L1 can effectively correct the spherical aberration of the system. Preferably, -2.43 ≤ (R1 + R2) / (R1 - R2) ≤ -1.25.

[0074] 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: 0.07≤d1 / TTL≤0.22, which is beneficial for achieving ultra-thinness. Preferably, 0.11≤d1 / TTL≤0.18.

[0075] 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.

[0076] The radius of curvature of the object-side surface of the second lens L2 is defined as R3, and the radius of curvature of the image-side surface of the second lens L2 is defined as R4, satisfying the following relationship: 0.49≤(R3+R4) / (R3-R4)≤6.78. This 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, 0.78≤(R3+R4) / (R3-R4)≤5.43.

[0077] The axial thickness of the second lens L2 is defined as d3, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d3 / TTL≤0.07, which is beneficial for achieving ultra-thinness. Preferably, 0.03≤d3 / TTL≤0.05.

[0078] 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.

[0079] The focal length of the third lens L3 is defined as f3, and the focal length of the imaging optical lens 10 is f, satisfying the following relationship: -86.98 ≤ f3 / f ≤ 1071.79. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -54.36 ≤ f3 / f ≤ 857.43.

[0080] The axial thickness of the third lens L3 is defined as d5, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d5 / TTL≤0.06, which is beneficial for achieving ultra-thinness. Preferably, 0.03≤d5 / TTL≤0.05.

[0081] In this embodiment, the object-side surface of the fourth lens L4 is concave near the axis, and the image-side surface is also concave 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.

[0082] The focal length of the fourth lens is defined as f4, and the focal length of the imaging optical lens 10 is f, satisfying the following relationship: -281.12 ≤ f4 / f ≤ 172.61; this specifies the ratio of the focal length of the fourth lens L4 to the system focal length, which helps improve the performance of the optical system within the conditional range. Preferably, -175.70 ≤ f4 / f ≤ 138.08.

[0083] The radius of curvature of the object-side surface of the fourth lens L4 is defined as R7, and the radius of curvature of the image-side surface of the fourth lens L4 is defined as R8, satisfying the following relationship: -1.99 ≤ (R7 + R8) / (R7 - R8) ≤ -0.15. This defines the shape of the fourth lens L4. Within this range, with the development of ultra-thin and wide-angle lenses, it is beneficial for correcting aberrations at off-axis drawing angles. Preferably, -1.24 ≤ (R7 + R8) / (R7 - R8) ≤ -0.18.

[0084] The on-axis thickness of the fourth lens L4 is defined as d7, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d7 / TTL≤0.10, which is beneficial for achieving ultra-thinness. Preferably, 0.04≤d7 / TTL≤0.08.

[0085] 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 positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the fifth lens L5 may also be configured with other concave and convex distributions.

[0086] The focal length of the fifth lens L5 is defined as f5, and the focal length of the camera optical lens 10 is f, satisfying the following relationship: 2.35 ≤ f5 / f ≤ 15.17. Limiting the fifth lens L5 effectively makes the light angle of the camera lens smoother and reduces tolerance sensitivity. Preferably, 3.76 ≤ f5 / f ≤ 12.14.

[0087] The radius of curvature of the object-side surface of the fifth lens L5 is defined as R9, and the radius of curvature of the image-side surface of the fifth lens L5 is defined as R10, satisfying the following relationship: -11.48 ≤ (R9 + R10) / (R9 - R10) ≤ -2.60. This defines the shape of the fifth lens L5. Within this range, with the development of ultra-thin and wide-angle lenses, it is beneficial for correcting aberrations at off-axis drawing angles. Preferably, -7.17 ≤ (R9 + R10) / (R9 - R10) ≤ -3.25.

[0088] The axial thickness of the fifth lens L5 is defined as d9, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d9 / TTL≤0.10, which is beneficial for achieving ultra-thinness. Preferably, 0.05≤d9 / TTL≤0.08.

[0089] In this embodiment, the object-side surface of the sixth lens L6 is convex near the axis, and the image-side surface is concave 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.

[0090] The focal length of the sixth lens L6 is defined as f6, and the focal length of the imaging optical lens 10 is f, satisfying the following relationship: 0.50 ≤ f6 / f ≤ 2.35. Within this range, through reasonable allocation of optical power, the system achieves better imaging quality and lower sensitivity. Preferably, 0.79 ≤ f6 / f ≤ 1.88.

[0091] The radius of curvature of the object-side surface of the sixth lens L6 is defined as R11, and the radius of curvature of the image-side surface of the sixth lens L6 is defined as R12, satisfying the following relationship: -9.21 ≤ (R11 + R12) / (R11 - R12) ≤ -2.57. This defines the shape of the sixth lens L6, which, within certain conditions, is beneficial for correcting aberrations in off-axis drawing angles as ultra-thin and wide-angle lenses develop. Preferably, it satisfies -5.76 ≤ (R11 + R12) / (R11 - R12) ≤ -3.21.

[0092] The axial thickness of the sixth lens L6 is defined as d11, and the total optical length of the imaging optical lens 10 is defined as TTL, satisfying the following relationship: 0.02≤d11 / TTL≤0.08, which is beneficial for achieving ultra-thinness. Preferably, 0.04≤d11 / TTL≤0.07.

[0093] In this embodiment, the object-side surface of the seventh lens L7 is concave near the axis, and the image-side surface is convex 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.

[0094] The focal length of the seventh lens L7 is defined as f7, and the focal length of the imaging optical lens 10 is f, satisfying the following relationship: -2.06 ≤ f7 / f ≤ -0.48. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -1.29 ≤ f7 / f ≤ -0.60.

[0095] The radius of curvature of the object-side surface of the seventh lens L7 is defined as R13, and the radius of curvature of the image-side surface of the seventh lens L7 is defined as R14, satisfying the following relationship: -5.97≤(R13+R14) / (R13-R14)≤-0.67; this defines the shape of the seventh lens L7. Within the range specified by the condition, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations in off-axis drawing angles. Preferably, -3.73≤(R13+R14) / (R13-R14)≤-0.84.

[0096] The axial thickness of the seventh lens L7 is defined as d13, and the total optical length of the imaging optical lens 10 is defined as TTL, satisfying the following relationship: 0.03≤d13 / TTL≤0.13, which is beneficial for achieving ultra-thinness. Preferably, 0.05≤d13 / TTL≤0.11.

[0097] In this embodiment, the total optical length (TTL) of the camera lens 10 is less than or equal to 6.88 mm, which is beneficial for achieving ultra-thinness. Preferably, the total optical length (TTL) is less than or equal to 6.57 mm.

[0098] This design allows the overall optical length (TTL) of the camera lens 10 to be kept as short as possible, maintaining its miniaturization characteristics.

[0099] Furthermore, TTL is the total optical length of the camera optical lens 10, and IH is the image height of the camera optical lens 10, satisfying the following relationship: TTL / IH≤1.23, which is beneficial for achieving ultra-thinness; FNO is the aperture value, satisfying the following relationship: FNO≤1.70, which is beneficial for achieving a large aperture and resulting in good imaging performance; the field of view is FOV, satisfying the following relationship: FOV≥84.00°, which is beneficial for achieving wide-angle.

[0100] The camera optical lens 10 achieves good optical imaging performance while also meeting the design requirements of large aperture 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.

[0101] 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.

[0102] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0103] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens 10.

[0104] 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.

[0105] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0106] Table 1

[0107]

[0108]

[0109] The meanings of each symbol are as follows.

[0110] S1: Aperture;

[0111] R: Radius of curvature of the optical surface; for lenses, it is the central radius of curvature.

[0112] R1: The radius of curvature of the object-side surface of the first lens L1;

[0113] R2: The radius of curvature of the image-side surface of the first lens L1;

[0114] R3: The radius of curvature of the object-side surface of the second lens L2;

[0115] R4: Radius of curvature of the image-side surface of the second lens L2;

[0116] R5: The radius of curvature of the object-side surface of the third lens L3;

[0117] R6: Radius of curvature of the image-side surface of the third lens L3;

[0118] R7: The radius of curvature of the object-side surface of the fourth lens L4;

[0119] R8: Radius of curvature of the image-side surface of the fourth lens L4;

[0120] R9: The radius of curvature of the object-side surface of the fifth lens L5;

[0121] R10: Radius of curvature of the image-side surface of the fifth lens L5;

[0122] R11: The radius of curvature of the object-side surface of the sixth lens L6;

[0123] R12: Radius of curvature of the image-side surface of the sixth lens L6;

[0124] R13: The radius of curvature of the object-side surface of the seventh lens L7;

[0125] R14: Radius of curvature of the image-side surface of the seventh lens L7;

[0126] R15: Radius of curvature of the object-side surface of the optical filter GF;

[0127] R16: Radius of curvature of the image-side surface of the optical filter GF;

[0128] d: The axial thickness of the lens and the axial distance between lenses;

[0129] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0130] d1: On-axis thickness of the first lens L1;

[0131] 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;

[0132] d3: On-axis thickness of the second lens L2;

[0133] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0134] d5: On-axis thickness of the third lens L3;

[0135] 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;

[0136] d7: On-axis thickness of the fourth lens L4;

[0137] 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;

[0138] d9: On-axis thickness of the fifth lens L5;

[0139] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0140] d11: On-axis thickness of the sixth lens L6;

[0141] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0142] d13: On-axis thickness of the seventh lens L7;

[0143] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0144] d15: On-axis thickness of the optical filter GF;

[0145] d16: The axial distance from the image-side surface of the optical filter GF to the image plane;

[0146] nd: Refractive index of the d-line;

[0147] nd1: The refractive index of the d-line of the first lens L1;

[0148] nd2: The refractive index of the d-line of the second lens L2;

[0149] nd3: The refractive index of the d-line of the third lens L3;

[0150] nd4: The refractive index of the d-line of the fourth lens L4;

[0151] nd5: The refractive index of the d-line of the fifth lens L5;

[0152] nd6: The refractive index of the d-line of the sixth lens L6;

[0153] nd7: The refractive index of the d-line of the seventh lens L7;

[0154] ndg: The refractive index of the d-line of the optical filter GF;

[0155] vd: Abbe number;

[0156] v1: Abbe number of the first lens L1;

[0157] v2: Abbe number of the second lens L2;

[0158] v3: Abbe number of the third lens L3;

[0159] v4: Abbe number of the fourth lens L4;

[0160] v5: Abbe number of the fifth lens L5;

[0161] v6: Abbe number of the sixth lens L6;

[0162] v7: Abbe number of the seventh lens L7;

[0163] vg: Abbe number of the optical filter GF.

[0164] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0165] Table 2

[0166]

[0167]

[0168] For convenience, the aspherical surfaces of each lens surface are those shown in formula (1) above. However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0169] 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)

[0170] 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).

[0171] Tables 3 and 4 show the inflection point and stagnation point design data of each lens in the camera optical lens 10 of the first embodiment of the present invention. P1R1 and P1R2 represent the object-side and image-side surfaces of the first lens L1, respectively; P2R1 and P2R2 represent the object-side and image-side surfaces of the second lens L2, respectively; P3R1 and P3R2 represent the object-side and image-side surfaces of the third lens L3, respectively; P4R1 and P4R2 represent the object-side and image-side surfaces of the fourth lens L4, respectively; P5R1 and P5R2 represent the object-side and image-side surfaces of the fifth lens L5, respectively; P6R1 and P6R2 represent the object-side and image-side surfaces of the sixth lens L6, respectively; and P7R1 and P7R2 represent the object-side and image-side surfaces of the seventh lens L7, respectively. The data corresponding to the "Inflection Point Position" column is the vertical distance from the inflection point set on the surface of each lens to the optical axis of the camera optical lens 10. The data in the "Station Point Position" field corresponds to the vertical distance from the station point set on each lens surface to the optical axis of the camera optical lens 10.

[0172] Table 3

[0173] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 Recurve point position 4 P1R1 1 1.525 / / / P1R2 1 1.205 / / / P2R1 0 / / / / P2R2 0 / / / / P3R1 1 0.255 / / / P3R2 2 0.275 1.255 / / P4R1 2 1.285 1.585 / / P4R2 3 0.135 1.455 1.785 / P5R1 2 0.605 1.955 / / P5R2 4 0.255 1.975 2.195 2.385 P6R1 4 0.825 2.115 2.995 3.095 P6R2 4 0.935 3.075 3.225 3.375 P7R1 3 1.505 3.205 3.655 / P7R2 3 3.165 3.395 3.755 /

[0174] Table 4

[0175]

[0176]

[0177] Figure 2A schematic diagram of axial aberrations is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm, and 656nm passes through the imaging optical lens 10 of the first embodiment. Figure 3 A schematic diagram of magnification chromatic aberration is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm and 656nm passes through the camera optical lens 10 of the first embodiment. Figure 4 This illustrates the field curvature and distortion of light with a wavelength of 546 nm after passing 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.

[0178] Table 21, which appears later, shows the values ​​corresponding to various numerical values ​​and parameters specified in the conditional expressions for each of the first, second, third, fourth, and comparative embodiments.

[0179] As shown in Table 21, the first embodiment satisfies all the conditional expressions.

[0180] In this embodiment, the entrance pupil diameter of the camera optical lens 10 is 3.24 mm, the full field of view image height is 5.120 mm, and the diagonal field of view is 85.20°, so that 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.

[0181] (Second Implementation)

[0182] The second embodiment is basically the same as the first embodiment, and the symbols have the same meanings. For the structural form of the camera optical lens 20 in this second embodiment, please refer to... Figure 5 As shown, only the differences are listed below.

[0183] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0184] Table 5

[0185]

[0186]

[0187] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0188] Table 6

[0189]

[0190]

[0191] 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.

[0192] Table 7

[0193]

[0194]

[0195] Table 8

[0196] Number of outposts Location 1 P1R1 0 / P1R2 0 / P2R1 0 / P2R2 0 / P3R1 1 0.305 P3R2 1 0.465 P4R1 0 / P4R2 1 0.105 P5R1 1 1.165 P5R2 1 0.555 P6R1 1 1.375 P6R2 1 1.565 P7R1 1 3.845 P7R2 0 /

[0197] Figure 6 A schematic diagram of axial aberrations is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm, and 656nm passes through the imaging optical lens 20 of the second embodiment. Figure 7 A schematic diagram of magnification chromatic aberration is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm and 656nm passes through the camera optical lens 20 of the second embodiment. Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm 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.

[0198] As shown in Table 21, the second embodiment satisfies each conditional expression.

[0199] In this embodiment, the entrance pupil diameter of the camera optical lens 20 is 3.127mm, the full field of view image height is 5.120mm, and the diagonal field of view is 87.00°, which makes the camera optical lens 20 meet the design requirements of wide-angle and ultra-thin design, fully corrects its on-axis and off-axis chromatic aberration, and has excellent optical characteristics.

[0200] (Third Implementation)

[0201] The third embodiment is basically the same as the first embodiment, and the symbols have the same meanings as in the first embodiment. For the structural form of the camera optical lens 30 in this third embodiment, please refer to... Figure 9 As shown, only the differences are listed below.

[0202] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0203] Table 9

[0204]

[0205] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0206] Table 10

[0207]

[0208]

[0209] 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.

[0210] Table 11

[0211] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 Recurve point position 4 P1R1 1 1.595 / / / P1R2 1 1.395 / / / P2R1 0 / / / / P2R2 0 / / / / P3R1 1 0.335 / / / P3R2 2 0.345 1.255 / / P4R1 2 1.295 1.535 / / P4R2 3 0.025 1.445 1.775 / P5R1 2 0.565 1.955 / / P5R2 4 0.275 1.955 2.235 2.405 P6R1 4 0.815 2.115 3.015 3.105 P6R2 2 0.925 3.035 / / P7R1 4 1.495 3.295 3.625 3.875 P7R2 4 3.035 3.605 3.645 3.995

[0212] Table 12

[0213]

[0214]

[0215] Figure 10 A schematic diagram of axial aberrations is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm, and 656nm passes through the imaging optical lens 30 of the third embodiment. Figure 11 A schematic diagram of magnification chromatic aberration is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm and 656nm 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 546nm 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.

[0216] Table 21 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical system of this embodiment satisfies the above-described conditional expressions.

[0217] In this embodiment, the entrance pupil diameter of the camera optical lens 30 is 3.283mm, the full field of view image height is 5.120mm, and the diagonal field of view is 84.20°, which makes the camera optical lens 30 meet the design requirements of wide-angle and ultra-thin design, fully corrects its on-axis and off-axis chromatic aberration, and has excellent optical characteristics.

[0218] (Fourth Implementation)

[0219] The fourth embodiment is basically the same as the first embodiment, and the symbols have the same meanings as in the first embodiment. For the structural form of the camera optical lens 40 in this fourth embodiment, please refer to... Figure 13 As shown, only the differences are listed below.

[0220] In this embodiment, the object-side surface of the second lens L2 is concave near the axis. The object-side surface of the third lens L3 is concave near the axis, and the image-side surface is convex near the axis; the third lens L3 has positive refractive power. The object-side surface of the fourth lens L4 is convex near the axis, and the image-side surface is convex near the axis; the fourth lens L4 has positive refractive power.

[0221] Tables 13 and 14 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0222] Table 13

[0223]

[0224] Table 14 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0225] Table 14

[0226]

[0227]

[0228] 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.

[0229] Table 15

[0230]

[0231]

[0232] Table 16

[0233] Number of outposts Location 1 P1R1 0 / P1R2 0 / P2R1 1 0.105 P2R2 0 / P3R1 0 / P3R2 0 / P4R1 1 0.115 P4R2 0 / P5R1 1 0.945 P5R2 1 0.425 P6R1 1 1.345 P6R2 1 1.535 P7R1 1 3.865 P7R2 0 /

[0234] Figure 14 A schematic diagram of axial aberrations is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm, and 656nm passes through the imaging optical lens 40 of the fourth embodiment. Figure 15 A schematic diagram of magnification chromatic aberration is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm and 656nm 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 546nm 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.

[0235] Table 21 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical system of this embodiment satisfies the above-described conditional expressions.

[0236] In this embodiment, the entrance pupil diameter of the camera optical lens 40 is 3.182mm, the full field of view image height is 5.120mm, and the diagonal field of view is 86.00°, which makes the camera optical lens 40 meet the design requirements of wide-angle and ultra-thin design, fully corrects its on-axis and off-axis chromatic aberration, and has excellent optical characteristics.

[0237] (Comparative Implementation Methods)

[0238] The symbols in the comparative implementation method have the same meanings as those in the first implementation method; only the differences are listed below.

[0239] Figure 17 The image shows a camera lens 50 according to a comparative embodiment.

[0240] Tables 17 and 18 show the design data of the camera optical lens 50 of the comparative embodiment.

[0241] Table 17

[0242]

[0243]

[0244] Table 18 shows the aspherical data of each lens in the camera optical lens 50 of the comparative embodiment.

[0245] Table 18

[0246]

[0247]

[0248] Tables 19 and 20 show the inflection point and stagnation point design data of each lens in the camera optical lens 50 of the comparative embodiment.

[0249] Table 19

[0250] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 Recurve point position 4 P1R1 1 1.575 / / / P1R2 1 1.415 / / / P2R1 0 / / / / P2R2 0 / / / / P3R1 2 0.315 1.225 / / P3R2 2 0.355 1.235 / / P4R1 0 / / / / P4R2 1 0.055 / / / P5R1 2 0.545 1.925 / / P5R2 2 0.275 1.885 / / P6R1 2 0.815 2.105 / / P6R2 1 0.925 / / / P7R1 4 1.535 3.345 3.495 3.735 P7R2 4 3.035 3.495 3.715 4.005

[0251] Table 20

[0252]

[0253]

[0254] Figure 18A schematic diagram of axial aberrations is shown after light with wavelengths of 436 nm, 486 nm, 546 nm, 587 nm, and 656 nm passes through the imaging optical lens 50 of the comparative embodiment. Figure 19 A magnification chromatic aberration diagram is shown after light with wavelengths of 436nm, 486nm, 546nm, 587nm, and 656nm passes through the camera optical lens 50 of the comparative embodiment. Figure 20 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 50 of the comparative embodiment. Figure 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0255] Table 21 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the above conditional expression -8.00≤f2 / f≤-2.50.

[0256] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 3.319mm, the full field of view image height IH is 5.120mm, and the diagonal field of view FOV is 82.00°. The camera optical lens 50 does not meet the design requirements of large aperture, wide angle, and ultra-thin design.

[0257] Table 21

[0258]

[0259]

[0260] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A camera optical lens, characterized in that, The camera optical lens comprises seven lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, wherein the object side of the first lens is convex at the paraxial position and the image side of the first lens is concave at the paraxial position; A second lens with negative refractive power, wherein 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; A third lens with negative refractive power, wherein 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; A fourth lens with negative refractive power, wherein the object-side surface of the fourth lens is concave at the paraxial position and the image-side surface of the fourth lens is concave at the paraxial position; A fifth lens with positive refractive power, wherein the object-side surface of the fifth lens is convex at the paraxial position and the image-side surface of the fifth lens is concave at the paraxial position; A sixth lens with positive refractive power, wherein the object-side surface of the sixth lens is convex at the paraxial position and the image-side surface of the sixth lens is concave at the paraxial position; And a seventh lens with negative refractive power, wherein the object-side surface of the seventh lens is concave at the paraxial position and the image-side surface of the seventh lens is convex at the paraxial position; Alternatively, the seven lenses, from the object side to the image side, are arranged in the following order: a first lens with positive refractive power, wherein the object side of the first lens is convex at the paraxial position, and the image side of the first lens is concave at the paraxial position; A second lens with negative refractive power, wherein the object-side surface of the second lens is concave at the paraxial position and the image-side surface of the second lens is concave at the paraxial position; A third lens with positive refractive power, wherein the object-side surface of the third lens is concave near the axis, and the image-side surface of the third lens is convex near the axis; A fourth lens with positive refractive power, wherein 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; A fifth lens with positive refractive power, wherein the object-side surface of the fifth lens is convex at the paraxial position and the image-side surface of the fifth lens is concave at the paraxial position; A sixth lens with positive refractive power, wherein the object-side surface of the sixth lens is convex at the paraxial position and the image-side surface of the sixth lens is concave at the paraxial position; And a seventh lens with negative refractive power, wherein the object-side surface of the seventh lens is concave at the paraxial position and the image-side surface of the seventh lens is convex at the paraxial position; the focal length of the imaging optical lens is f, the focal length of the second lens is f2, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, and satisfying the following relationship: -8.00≤f² / f≤-2.50; 2.50≤(R5+R6) / (R5-R6)≤30.00; R8 / R7≤-1.

50.

2. The camera optical lens according to claim 1, characterized in that, The fifth lens has a focal length of f5, the sixth lens has a focal length of f6, the object-side surface of the seventh lens has a radius of curvature of R13, and the image-side surface of the seventh lens has a radius of curvature of R14, and satisfies the following relationship: 3.00≤f5 / f6≤8.00; 2.00≤R14 / R13.

3. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 0.44≤f1 / f≤1.57; -3.89≤(R1+R2) / (R1-R2)≤-1.00; 0.07≤d1 / TTL≤0.

22.

4. The camera optical lens according to claim 1, characterized in that, The radius of curvature of the object-side surface of the second lens is R3, the 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 imaging optical lens is TTL, satisfying the following relationship: 0.49≤(R3+R4) / (R3-R4)≤6.78; 0.02≤d3 / TTL≤0.

07.

5. The camera optical lens according to claim 1, characterized in that, The third lens has a focal length of f3, an on-axis thickness of d5, and a total optical length of TTL, satisfying the following relationship: -86.98≤f3 / f≤1071.79; 0.02≤d5 / TTL≤0.

06.

6. The camera optical lens according to claim 1, characterized in that, The fourth lens has a focal length of f4, an on-axis thickness of d7, and a total optical length of TTL, satisfying the following relationship: -281.12≤f4 / f≤172.61; -1.99≤(R7+R8) / (R7-R8)≤-0.15; 0.03≤d7 / TTL≤0.

10.

7. The camera optical lens according to claim 1, characterized in that, The fifth lens has a focal length of f5, a radius of curvature of R9 on the object side, a radius of curvature of R10 on the image side, an axial thickness of d9, and a total optical length of TTL, satisfying the following relationship: 2.35≤f5 / f≤15.17; -11.48≤(R9+R10) / (R9-R10)≤-2.60; 0.03≤d9 / TTL≤0.

10.

8. The camera optical lens according to claim 1, characterized in that, The sixth lens has a focal length of f6, a radius of curvature of R11 on the object side, a radius of curvature of R12 on the image side, an axial thickness of d11, and a total optical length of TTL, satisfying the following relationship: 0.50≤f6 / f≤2.35; -9.21≤(R11+R12) / (R11-R12)≤-2.57; 0.02≤d11 / TTL≤0.

08.

9. The camera optical lens according to claim 1, characterized in that, The seventh lens has a focal length of f7, a radius of curvature of R13 on the object side, a radius of curvature of R14 on the image side, an on-axis thickness of d13, and a total optical length of TTL, satisfying the following relationship: -2.06≤f7 / f≤-0.48; -5.97≤(R13+R14) / (R13-R14)≤-0.67; 0.03≤d13 / TTL≤0.

13.

10. The camera optical lens according to claim 1, characterized in that, At least one of the first lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is made of glass.

Images