Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises seven lenses in sequence from the object side to the image side, namely a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens with negative refractive power, a sixth lens with positive refractive power and a seventh lens with positive refractive power; wherein the focal length of the camera optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, and the following relationships are satisfied: 0.96 <= f1 / f <= 5.92; -2.57 <= f2 / f <= -0.63; 0.24 <= f3 / f <= 2.33; -0.05 <= (R5+R6) / (R5-R6) <= 0.64. 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 optical lenses has been increasing. Furthermore, due to the shrinking pixel size of image sensors and the current trend of electronic products being functional, lightweight, and portable, miniaturized camera optical lenses with good image quality have become the mainstream in the market.

[0003] To achieve better image quality, multi-element lens structures are often used. Furthermore, 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 emerged in lens design. While common seven-element lenses already possess good optical performance, their optical power, lens spacing, and lens shape still have certain limitations. This means that while the lens structure offers good optical performance, it cannot meet the design requirements of large apertures, long focal lengths, and ultra-thin designs. Summary of the Invention

[0004] 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.

[0005] To solve the above-mentioned technical problems, the present invention provides a camera optical lens, which comprises seven lenses in total. The seven lenses are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with positive refractive power.

[0006] Wherein, the focal length of the camera optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the central radius of curvature of the object side of the third lens is R5, and the central radius of curvature of the image side of the third lens is R6, and the following relationship is satisfied:

[0007] 0.96≤f1 / f≤5.92;

[0008] -2.57≤f² / f≤-0.63;

[0009] 0.24≤f³ / f≤2.33;

[0010] -0.05≤(R5+R6) / (R5-R6)≤0.64.

[0011] Optionally, the camera optical lens satisfies the following relationship:

[0012] 1.54 ≤ f1 / f ≤ 4.74;

[0013] -1.61≤f² / f≤-0.78;

[0014] 0.38≤f3 / f≤1.87;

[0015] -0.03≤(R5+R6) / (R5-R6)≤0.51.

[0016] Optionally, the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship:

[0017] -12.30≤(R1+R2) / (R1-R2)≤-1.41;

[0018] 0.03≤d1 / TTL≤0.13.

[0019] Optionally, the central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship:

[0020] 0.65≤(R3+R4) / (R3-R4)≤2.89;

[0021] 0.01≤d3 / TTL≤0.06.

[0022] Optionally, the on-axis thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship:

[0023] 0.02≤d5 / TTL≤0.15.

[0024] Optionally, the focal length of the fourth lens is f4, the central radius of curvature of the object-side surface of the fourth lens is R7, the central radius of curvature of the image-side surface of the fourth lens is R8, 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:

[0025] -2.98≤f4 / f≤4.65;

[0026] -2.25≤(R7+R8) / (R7+R8)≤-0.50;

[0027] 0.01≤d7 / TTL≤0.04;

[0028] Optionally, the focal length of the fifth lens is f5, the central radius of curvature of the object-side surface of the fifth lens is R9, the central radius of curvature of the image-side surface of the fifth lens is R10, the on-axis thickness of the fifth lens is d9, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0029] -1.80≤f5 / f≤-0.56;

[0030] -0.36≤(R9+R10) / (R9-R10)≤-0.06;

[0031] 0.01≤d9 / TTL≤0.04.

[0032] Optionally, the focal length of the sixth lens is f6, the central radius of curvature of the object-side surface of the sixth lens is R11, the central 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:

[0033] 0.60≤f6 / f≤2.24;

[0034] 0.67≤(R11+R12) / (R11-R12)≤2.67;

[0035] 0.02≤d11 / TTL≤0.08.

[0036] Optionally, the focal length of the seventh lens is f7, the central radius of curvature of the object-side surface of the seventh lens is R13, the central radius of curvature of the image-side surface of the seventh lens is R14, the on-axis thickness of the seventh lens is d13, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0037] 0.60≤f7 / f≤2.17;

[0038] -0.06≤(R13+R14) / (R13-R14)≤0.20;

[0039] 0.05≤d13 / TTL≤0.15.

[0040] Optionally, the aperture value of the camera optical lens is FNO, and satisfies the following relationship:

[0041] FNO≤2.27.

[0042] 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

[0043] 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:

[0044] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0045] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0046] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0047] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0048] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0049] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0050] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0051] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0052] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0053] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0054] Figure 11 yes Figure 9A schematic diagram of chromatic aberration at magnification for a camera lens;

[0055] Figure 12 yes Figure 9 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0056] 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.

[0057] (First Implementation)

[0058] 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 includes seven lenses. Specifically, the camera optical lens 10, from the object side to the image side, consists of: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture S1, a fifth lens L5, a sixth lens L6, and a seventh lens L7. A glass plate GF is provided between the seventh lens L7 and the image plane S1. The glass plate GF can be a glass cover plate or an optical filter.

[0059] 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, and the seventh lens L7 are all made of glass. In other optional embodiments, the lenses may be made of other materials.

[0060] In this embodiment, the focal length of the camera optical lens 10 is f, and the focal length of the first lens L1 is defined as f1, satisfying the following relationship: 0.96≤f1 / f≤5.92. This specifies the ratio of the focal length f1 of the first lens L1 to the total focal length f of the system, which helps to improve imaging performance within the range of the condition. Preferably, it satisfies 1.54≤f1 / f≤4.74.

[0061] The focal length of the imaging optical lens 10 is f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: -2.57 ≤ f2 / f ≤ -0.63. This specifies the ratio of the focal length f2 of the second lens L2 to the focal length f of the imaging optical lens 10. Through the reasonable allocation of focal lengths, the imaging optical lens 10 has better imaging quality and lower sensitivity. Preferably, it satisfies -1.61 ≤ f2 / f ≤ -0.78.

[0062] The focal length of the camera optical lens 10 is f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: 0.24 ≤ f3 / f ≤ 2.33. This specifies the ratio of the focal length f3 of the third lens L3 to the focal length f of the camera optical lens 10. Through the reasonable allocation of focal lengths, the camera optical lens 10 has better imaging quality and lower sensitivity. Preferably, it satisfies 0.38 ≤ f3 / f ≤ 1.87.

[0063] 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: -0.05≤(R5+R6) / (R5-R6)≤0.64. This defines the shape of the third lens L3. Within the range specified by the condition, it can mitigate the degree of light refraction after passing through the lens and effectively reduce aberrations. Preferably, it satisfies -0.03≤(R5+R6) / (R5-R6)≤0.51.

[0064] In this embodiment, the first lens L1 has positive refractive power, its object-side surface is convex near the axis, and its image-side surface is concave near the axis. In other optional embodiments, the object-side and image-side surfaces of the first lens L1 may also be configured with other concave and convex distributions.

[0065] 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: -12.30≤(R1+R2) / (R1-R2)≤-1.41. By reasonably controlling the shape of the first lens L1, it is possible to effectively correct the spherical aberration of the system. Preferably, it satisfies -7.69≤(R1+R2) / (R1-R2)≤-1.76.

[0066] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the first lens L1 is defined as d1, satisfying the following relationship: 0.03≤d1 / TTL≤0.13. Within the range of the condition, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.05≤d1 / TTL≤0.10.

[0067] In this embodiment, the second lens L2 has negative refractive power, its object-side surface is convex near the axis, and its image-side surface is concave near the axis. In other optional embodiments, the object-side and image-side surfaces of the second lens L2 may also be configured with other concave and convex distributions.

[0068] 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: 0.65 ≤ (R3 + R4) / (R3 - R4) ≤ 2.89. This relationship specifies the shape of the second lens L2, and within this range, it is beneficial for correcting on-axis chromatic aberration as lenses develop towards ultra-thin and long focal lengths. Preferably, it satisfies 1.03 ≤ (R3 + R4) / (R3 - R4) ≤ 2.31.

[0069] The second lens L2 has an on-axis thickness of d3, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.01≤d3 / TTL≤0.06. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.01≤d3 / TTL≤0.05.

[0070] In this embodiment, the third lens L3 has positive refractive power, and both its object-side and image-side surfaces are convex near the axis. In other optional embodiments, the object-side and image-side surfaces may also be configured with other concave and convex distributions.

[0071] The total optical length of the camera lens 10 is defined as TTL, and the on-axis thickness of the third lens L3 is d5, satisfying the following relationship: 0.02≤d5 / TTL≤0.15. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d5 / TTL≤0.12.

[0072] In this embodiment, the fourth lens L4 has negative refractive power, and both its object-side and image-side surfaces are concave near the axis. 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.

[0073] The focal length of the overall imaging optical lens 10 is f, and the focal length of the fourth lens is defined as f4, satisfying the following relationship: -2.98 ≤ f4 / f ≤ 4.65. This relationship specifies the ratio of the focal length of the fourth lens to the system focal length, which helps to improve the performance of the optical system within the conditional range. Preferably, it satisfies -1.87 ≤ f4 / f ≤ 3.72.

[0074] The central radius of curvature of the object-side surface of the fourth lens L4 is R7, and the central radius of curvature of the image-side surface of the fourth lens L4 is R8, satisfying the following relationship: -2.25 ≤ (R7 + R8) / (R7 + R8) ≤ -0.50. This relationship defines the shape of the fourth lens L4, and within the specified range, it is beneficial for correcting aberrations at off-axis angles as ultra-thin long focal lengths develop. Preferably, it satisfies -1.41 ≤ (R7 + R8) / (R7 - R8) ≤ -0.63.

[0075] 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: 0.01≤d7 / TTL≤0.04. Within this range, it is beneficial to achieve ultra-thinness. Preferably, 0.01≤d7 / TTL≤0.03 is satisfied.

[0076] In this embodiment, the fifth lens L5 has negative refractive power, and both its object-side and image-side surfaces are concave near the axis. 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.

[0077] The focal length of the overall camera optical lens 10 is f, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: -1.80 ≤ f5 / f ≤ -0.56. Limiting the fifth lens L5 effectively makes the light angle of the camera lens smoother and reduces tolerance sensitivity. Preferably, it satisfies -1.12 ≤ f5 / f ≤ -0.70.

[0078] The radius of curvature R9 of the object-side surface and the radius of curvature R10 of the image-side surface of the fifth lens L5 are defined, satisfying the following relationship: -0.36 ≤ (R9 + R10) / (R9 - R10) ≤ -0.06. This relationship specifies the shape of the fifth lens L5, and within the given conditions, it is beneficial for correcting aberrations at off-axis angles as ultra-thin long focal lengths develop. Preferably, it satisfies -0.22 ≤ (R9 + R10) / (R9 - R10) ≤ -0.07.

[0079] The on-axis 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: 0.01≤d9 / TTL≤0.04. Within the range of this condition, it is beneficial to achieve ultra-thinness. Preferably, 0.01≤d9 / TTL≤0.03 is satisfied.

[0080] In this embodiment, the sixth lens L6 has positive refractive power, with its object-side surface being concave near the axis and its image-side surface being convex near the axis. In other optional embodiments, the object-side and image-side surfaces of the sixth lens L6 may also be configured with other concave and convex distributions.

[0081] The focal length of the overall camera optical lens 10 is f, and the focal length of the sixth lens L6 is f6, satisfying the following relationship: 0.60≤f6 / f≤2.24. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 0.96≤f6 / f≤1.79.

[0082] 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: 0.67 ≤ (R11 + R12) / (R11 - R12) ≤ 2.67. This relationship specifies the shape of the sixth lens L6. Within this range, with the development of ultra-thin long focal lengths, it is beneficial for correcting aberrations at off-axis angles. Preferably, it satisfies 1.07 ≤ (R11 + R12) / (R11 - R12) ≤ 2.13.

[0083] The axial thickness of the sixth lens L6 is defined as d11, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d11 / TTL≤0.08, which is beneficial for achieving ultra-thinness. Preferably, it satisfies 0.04≤d11 / TTL≤0.06.

[0084] In this embodiment, the seventh lens L7 has positive refractive power, and both its object-side and image-side surfaces are convex near the axis. 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.

[0085] The focal length of the camera optical lens 10 is f, and the focal length of the seventh lens L7 is f7, satisfying the following relationship: 0.60≤f7 / f≤2.17. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 0.95≤f7 / f≤1.73.

[0086] 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: -0.06≤(R13+R14) / (R13-R14)≤0.20. This relationship specifies the shape of the seventh lens L7. Within this range, with the development of ultra-thin long focal lengths, it is beneficial for correcting aberrations at off-axis angles. Preferably, it satisfies -0.04≤(R13+R14) / (R13-R14)≤0.16.

[0087] The axial thickness of the seventh lens L7 is defined as d13, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.05 ≤ d13 / TTL ≤ 0.15. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.07 ≤ d13 / TTL ≤ 0.12.

[0088] In this embodiment, the aperture value of the camera optical lens 10 is defined as FNO, satisfying the following relationship: FNO≤2.27, thereby achieving a large aperture and good imaging performance of the camera optical lens 10. Preferably, FNO≤2.22 is satisfied.

[0089] In this embodiment, the field of view (FOV) of the camera optical lens 10 is defined as FOV, satisfying the following relationship: FOV ≥ 32.00°, thereby achieving wide-angle viewing.

[0090] 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.

[0091] 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, and on-axis thickness are mm.

[0092] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0093] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0094] Table 1 shows the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0095] Table 1

[0096]

[0097] The meanings of each symbol are as follows.

[0098] S1: Aperture;

[0099] R: Radius of curvature at the center of the optical surface;

[0100] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0101] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0102] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0103] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0104] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0105] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0106] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0107] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0108] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0109] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0110] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0111] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0112] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0113] R14: The central radius of curvature of the image-side surface of the seventh lens L7;

[0114] d: Axial thickness of the lens, axial distance between lenses;

[0115] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0116] d1: On-axis thickness of the first lens L1;

[0117] 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;

[0118] d3: On-axis thickness of the second lens L2;

[0119] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0120] d5: On-axis thickness of the third lens L3;

[0121] 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;

[0122] d7: On-axis thickness of the fourth lens L4;

[0123] 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;

[0124] d9: On-axis thickness of the fifth lens L5;

[0125] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0126] d11: On-axis thickness of the sixth lens L6;

[0127] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0128] d13: On-axis thickness of the seventh lens L7;

[0129] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0130] Figure 2 , Figure 3 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 436nm, 486nm, 546nm, 588nm, and 656nm 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 546nm 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.

[0131] (Second Implementation)

[0132] Figure 5 The image shown is a camera optical lens 20 according to the second embodiment of the present invention. The second embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. Only the differences are listed below.

[0133] The fourth lens L4 has positive refractive power, and its image-side surface is convex near the axis.

[0134] Table 2 shows the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0135] Table 2

[0136]

[0137] Figure 6 , Figure 7 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 436nm, 486nm, 546nm, 588nm, and 656nm after passing 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.

[0138] (Third Implementation)

[0139] Figure 9 The image shown is the camera optical lens 30 of the third embodiment of the present invention. The third embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. Only the differences are listed below.

[0140] Among them, the image-side surface of the fourth lens L4 is convex at the paraxial position.

[0141] Table 3 shows the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0142] Table 3

[0143]

[0144] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 436nm, 486nm, 546nm, 588nm, 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.

[0145] 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 consists of seven lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with positive refractive power. Wherein, the focal length of the camera optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the central radius of curvature of the object side of the third lens is R5, and the central radius of curvature of the image side of the third lens is R6, and the following relationship is satisfied: 0.96≤f1 / f≤5.92; -2.57≤f² / f≤-0.63; 0.24≤f³ / f≤2.33; -0.05≤(R5+R6) / (R5-R6)≤0.

64.

2. The camera optical lens according to claim 1, characterized in that, The camera optical lens satisfies the following relationship: 1.54 ≤ f1 / f ≤ 4.74; -1.61≤f² / f≤-0.78; 0.38≤f3 / f≤1.87; -0.03≤(R5+R6) / (R5-R6)≤0.

51.

3. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: -12.30≤(R1+R2) / (R1-R2)≤-1.41; 0.03≤d1 / TTL≤0.

13.

4. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 0.65≤(R3+R4) / (R3-R4)≤2.89; 0.01≤d3 / TTL≤0.

06.

5. The camera optical lens according to claim 1, characterized in that, The axial thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 0.02≤d5 / TTL≤0.

15.

6. The camera optical lens according to claim 1, characterized in that, The fourth lens has a focal length of f4, a central radius of curvature of the object-side surface of the fourth lens of R7, a central radius of curvature of the image-side surface of the fourth lens of R8, an on-axis thickness of d7, and a total optical length of TTL, satisfying the following relationship: -2.98≤f4 / f≤4.65; -2.25≤(R7+R8) / (R7+R8)≤-0.50; 0.01≤d7 / TTL≤0.

04.

7. The camera optical lens according to claim 1, characterized in that, The fifth lens has a focal length of f5, a central radius of curvature of the object-side surface of the fifth lens of R9, a central radius of curvature of the image-side surface of the fifth lens of R10, an axial thickness of d9, and a total optical length of TTL, satisfying the following relationship: -1.80≤f5 / f≤-0.56; -0.36≤(R9+R10) / (R9-R10)≤-0.06; 0.01≤d9 / TTL≤0.

04.

8. The camera optical lens according to claim 1, characterized in that, The sixth lens has a focal length of f6, a central radius of curvature of the object-side surface of the sixth lens of R11, a central radius of curvature of the image-side surface of the sixth lens of R12, an axial thickness of d11, and a total optical length of TTL, satisfying the following relationship: 0.60≤f6 / f≤2.24; 0.67≤(R11+R12) / (R11-R12)≤2.67; 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 central radius of curvature of the object-side surface of the seventh lens of R13, a central radius of curvature of the image-side surface of the seventh lens of R14, an axial thickness of d13, and a total optical length of TTL, satisfying the following relationship: 0.60≤f7 / f≤2.17; -0.06≤(R13+R14) / (R13-R14)≤0.20; 0.05≤d13 / TTL≤0.

15.

10. The camera optical lens according to claim 1, characterized in that, The aperture value of the camera optical lens is FNO, and it satisfies the following relationship: FNO≤2.27.

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