Camera optical lens

Abstract

This invention provides a camera optical lens, which comprises, from the object side to the image side: a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power. The second lens has a focal length of f2, the fifth lens has a focal length of f5, 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 central radius of curvature of the object side of the third lens is R5, and the on-axis thickness of the third lens is d5, satisfying the following relationships: 0.50≤f2 / f5≤1.50; -30.00≤R5 / d5≤-10.00; -20.00≤(R1+R2) / (R1-R2)≤-5.00. This camera optical lens not only has good optical performance but also meets the design requirements of 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. Due to the shrinking pixel size of image sensors and the current trend in electronic products towards high functionality and slim, lightweight designs, miniaturized camera lenses with good image quality have become mainstream in the market. To achieve better image quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasingly diverse user needs, as the pixel area of ​​image sensors continues to shrink and system requirements for image quality continue to rise, seven-element lens structures are gradually appearing in lens designs. There is an urgent need for 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 being ultra-thin and having a wide angle.

[0004] The technical solution of the present invention is as follows: a camera optical lens, wherein the camera optical lens comprises, from the object side to the image side, the following in sequence: a first lens having positive refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having positive refractive power, and a sixth lens having negative refractive power;

[0005] The second lens has a focal length of f2, the fifth lens has a focal length of f5, 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 central radius of curvature of the object side of the third lens is R5, and the axial thickness of the third lens is d5, and the following relationships are satisfied: 0.50≤f2 / f5≤1.50; -30.00≤R5 / d5≤-10.00; -20.00≤(R1+R2) / (R1-R2)≤-5.00.

[0006] 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 camera optical lens is f, the focal length of the first lens is f1, the on-axis thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 2.73≤f1 / f≤26.82; 0.02≤d1 / TTL≤0.10.

[0007] Preferably, the camera optical lens satisfies the following relationships: 4.37≤f1 / f≤21.46; 0.04≤d1 / TTL≤0.08.

[0008] Preferably, the object-side surface of the second lens is convex near the axis; the focal length of the imaging optical lens is f, 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, and satisfies the following relationships: 0.44≤f² / f≤2.38; -4.05≤(R3+R4) / (R3-R4)≤-0.23; 0.03≤d3 / TTL≤0.12.

[0009] Preferably, the camera optical lens satisfies the following relationships: 0.71≤f2 / f≤1.91; -2.53≤(R3+R4) / (R3-R4)≤-0.28; 0.04≤d3 / TTL≤0.10.

[0010] Preferably, the object-side surface of the third lens is concave at the paraxial position; the focal length of the imaging optical lens is f, the focal length of the third lens is f3, the central radius of curvature of the image-side surface of the third lens is R6, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationships: -4.20≤f3 / f≤-1.02; -3.19≤(R5+R6) / (R5-R6)≤-0.51; 0.02≤d5 / TTL≤0.10.

[0011] Preferably, the camera optical lens satisfies the following relationships: -2.63≤f3 / f≤-1.28; -2.00≤(R5+R6) / (R5-R6)≤-0.64; 0.03≤d5 / TTL≤0.08.

[0012] Preferably, 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 satisfies the following relationships: 0.92≤f4 / f≤239.91; -191.87≤(R7+R8) / (R7-R8)≤-0.06; 0.07≤d7 / TTL≤0.26.

[0013] Preferably, the camera optical lens satisfies the following relationships: 1.46≤f4 / f≤191.93; -119.92≤(R7+R8) / (R7-R8)≤-0.08; 0.11≤d7 / TTL≤0.21.

[0014] 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 camera optical lens is f, 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 axial thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and satisfies the following relationships: 0.42≤f5 / f≤2.62; -6.33≤(R9+R10) / (R9-R10)≤-0.88; 0.03≤d9 / TTL≤0.16.

[0015] Preferably, the camera optical lens satisfies the following relationships: 0.68≤f5 / f≤2.09; -3.96≤(R9+R10) / (R9-R10)≤-1.09; 0.05≤d9 / TTL≤0.13.

[0016] Preferably, the object-side surface of the sixth lens is convex near the axis, and the image-side surface of the sixth lens is concave near the axis; the focal length of the camera optical lens is f, 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 camera optical lens is TTL, and satisfies the following relationships: -2.18≤f6 / f≤-0.49; 0.51≤(R11+R12) / (R11-R12)≤4.05; 0.05≤d11 / TTL≤0.23.

[0017] Preferably, the camera optical lens satisfies the following relationships: -1.36≤f6 / f≤-0.62; 0.81≤(R11+R12) / (R11-R12)≤3.24; 0.08≤d11 / TTL≤0.18.

[0018] Preferably, the focal length of the camera optical lens is f, the combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied: 0.43≤f12 / f≤1.89.

[0019] Preferably, the aperture value of the camera optical lens is FNO, and satisfies the following relationship: FNO≤2.58.

[0020] Preferably, the field of view (FOV) of the camera optical lens in the diagonal direction is FOV, and satisfies the following relationship: FOV≥80.95°.

[0021] 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: TTL / IH≤1.59.

[0022] The beneficial effects of this invention are as follows:

[0023] The camera optical lens of the present invention has excellent optical characteristics, and is characterized by wide-angle and ultra-thin design. It is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. [Attached Image Description]

[0024] 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:

[0025] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0027] Figure 3 yes Figure 1 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0028] Figure 4 yes Figure 1 The diagram shows the field curvature and distortion of the camera lens.

[0029] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0030] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0031] Figure 7 yes Figure 5 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0032] Figure 8 yes Figure 5 The diagram shows the field curvature and distortion of the camera lens.

[0033] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0034] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of a camera optical lens is shown.

[0035] Figure 11 yes Figure 9 The diagram shows the magnification chromatic aberration of the camera optical lens.

[0036] Figure 12 yes Figure 9 The diagram shows the field curvature and distortion of the camera lens.

Detailed Implementation Methods

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] 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.

[0039] (First Implementation)

[0040] 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 the first embodiment of the present invention. Figure 1 In the image, the left side is the object side and the right side is the image side. The camera optical lens 10 includes six lenses, which are arranged from the object side to the image side as follows: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6. Optical elements such as an optical filter GF can be disposed between the sixth lens L6 and the image plane Si.

[0041] In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are all made of plastic. In other embodiments, the lenses may be made of other materials.

[0042] In this embodiment, the first lens L1 has positive refractive power, the second lens L2 has positive refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.

[0043] In this embodiment, the focal length of the second lens L2 is defined as f2, the focal length of the fifth lens L5 is defined as f5, the central radius of curvature of the object-side surface of the first lens L1 is defined as R1, the central radius of curvature of the image-side surface of the first lens L1 is defined as R2, the central radius of curvature of the object-side surface of the third lens L3 is defined as R5, and the on-axis thickness of the third lens L3 is defined as d5, and the following relationship is satisfied:

[0044] 0.50≤f2 / f5≤1.50; (1)

[0045] -30.00≤R5 / d5≤-10.00; (2)

[0046] -20.00≤(R1+R2) / (R1-R2)≤-5.00. (3)

[0047] Among them, condition (1) specifies the ratio of the focal length f2 of the second lens L2 to the focal length f5 of the fifth lens L5, which can effectively reduce the sensitivity of the optical lens group for imaging and further improve the imaging quality.

[0048] Condition (2) controls the ratio of the central radius of curvature R5 of the object side of the third lens L3 to the on-axis thickness d5 of the third lens L3 within a reasonable range, which is beneficial to correcting the aberrations of the optical system.

[0049] Condition (3) reasonably controls the shape of the first lens L1 so that the first lens L1 can effectively correct the spherical aberration of the system.

[0050] In this embodiment, the first lens L1 has positive refractive power, and the object-side surface of the first lens L1 is convex near the axis, while the 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.

[0051] 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: 2.73 ≤ f1 / f ≤ 26.82. 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 positive refractive power, which is beneficial for reducing system aberrations and also promotes the development of camera optical lenses towards ultra-thinness and wide-angle capabilities. Preferably, it satisfies 4.37 ≤ f1 / f ≤ 21.46.

[0052] The on-axis thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d1 / TTL≤0.10. Within the range of this condition, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d1 / TTL≤0.08.

[0053] In this embodiment, the second lens L2 has positive refractive power, and both the object-side and image-side surfaces of the second lens L2 are convex 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.

[0054] The focal length of the second lens L2 is defined as f2, and the focal length of the imaging optical lens 10 is f, satisfying the following relationship: 0.44 ≤ f2 / f ≤ 2.38. 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 0.71 ≤ f2 / f ≤ 1.91.

[0055] The object-side radius of curvature of the second lens L2 is R3, and the image-side radius of curvature of the second lens L2 is R4, satisfying the following relationship: -4.05 ≤ (R3 + R4) / (R3 - R4) ≤ -0.23. 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 -2.53 ≤ (R3 + R4) / (R3 - R4) ≤ -0.28.

[0056] 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: 0.03≤d3 / TTL≤0.12. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d3 / TTL≤0.10.

[0057] In this embodiment, the third lens L3 has negative refractive power, and both the object-side and image-side surfaces of the third lens L3 are concave near the axis. In other optional embodiments, the object-side and image-side surfaces of the third lens L3 may also be configured with other concave or convex distributions.

[0058] 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: -4.20 ≤ f3 / f ≤ -1.02. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -2.63 ≤ f3 / f ≤ -1.28.

[0059] The central radius of curvature of the object-side surface of the third lens L3 is R5, and the central radius of curvature of the image-side surface of the third lens L3 is R6, satisfying the following relationship: -3.19≤(R5+R6) / (R5-R6)≤-0.51. 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 -2.00≤(R5+R6) / (R5-R6)≤-0.64.

[0060] The on-axis thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d5 / TTL≤0.10. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d5 / TTL≤0.08.

[0061] In this embodiment, the fourth lens L4 has positive refractive power. The object-side surface of the fourth lens L4 is concave near the axis, and the image-side surface is convex near the axis. In other optional embodiments, the object-side and image-side surfaces of the fourth lens L4 may also be configured with other concave and convex distributions.

[0062] The focal length of the fourth lens L4 is defined as f4, and the focal length of the imaging optical lens 10 is f, satisfying the following relationship: 0.92 ≤ f4 / f ≤ 239.91. This specifies the ratio of the focal length f4 of the fourth lens L4 to the focal length f of the imaging optical lens 10, which helps improve the performance of the optical system within the conditional range. Preferably, it satisfies 1.46 ≤ f4 / f ≤ 191.93.

[0063] 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: -191.87≤(R7+R8) / (R7-R8)≤-0.06. 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 -119.92≤(R7+R8) / (R7-R8)≤-0.08.

[0064] The axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.07≤d7 / TTL≤0.26. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.11≤d7 / TTL≤0.21.

[0065] In this embodiment, the fifth lens L5 has positive refractive power. The object-side surface of the fifth lens L5 is convex near the axis, and the image-side surface is concave near the axis. 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.

[0066] The focal length of the fifth lens L5 is defined as f5, and the focal length of the imaging optical lens 10 is f, satisfying the following relationship: 0.42≤f5 / f≤2.62. Limiting the fifth lens L5 effectively makes the light angle of the imaging optical lens 10 smoother, reducing tolerance sensitivity. Preferably, it satisfies 0.68≤f5 / f≤2.09.

[0067] The central radius of curvature of the object-side surface of the fifth lens L5 is R9, and the central radius of curvature of the image-side surface of the fifth lens L5 is R10, satisfying the following relationship: -6.33≤(R9+R10) / (R9-R10)≤-0.88. This defines the shape of the fifth lens L5, and when within this range, it is beneficial for correcting aberrations and other problems related to off-axis drawing angles. Preferably, it satisfies -3.96≤(R9+R10) / (R9-R10)≤-1.09.

[0068] The fifth lens L5 has an on-axis thickness of d9, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d9 / TTL≤0.16. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.05≤d9 / TTL≤0.13.

[0069] In this embodiment, the sixth lens L6 has negative refractive power. The object-side surface of the sixth lens L6 is convex near the axis, and the image-side surface is concave 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.

[0070] The focal length of the camera optical lens 10 is defined as f, and the focal length of the sixth lens L6 is defined as f6, satisfying the following relationship: -2.18 ≤ f6 / f ≤ -0.49. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -1.36 ≤ f6 / f ≤ -0.62 is satisfied.

[0071] The central radius of curvature of the object-side surface of the sixth lens L6 is R11, and the central radius of curvature of the image-side surface of the sixth lens L6 is R12, satisfying the following relationship: 0.51≤(R11+R12) / (R11-R12)≤4.05. This defines the shape of the sixth lens L6. Within this conditional range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 0.81≤(R11+R12) / (R11-R12)≤3.24.

[0072] The axial thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.05≤d11 / TTL≤0.23. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.08≤d11 / TTL≤0.18.

[0073] In this embodiment, the focal length of the camera optical lens 10 is defined as f, and the combined focal length of the first lens L1 and the second lens L2 is f12, satisfying the following relationship: 0.43≤f12 / f≤1.89. This eliminates aberrations and distortions in the camera optical lens 10 and reduces the back focal length of the camera optical lens 10, maintaining the miniaturization of the image lens system. Preferably, 0.69≤f12 / f≤1.51.

[0074] In this embodiment, the aperture value of the camera optical lens 10 is defined as FNO, satisfying the following relationship: FNO≤2.58, which is beneficial for achieving a large aperture. Preferably, FNO≤2.53 is satisfied.

[0075] In this embodiment, the field of view (FOV) along the diagonal direction of the camera optical lens 10 is defined as FOV, satisfying the following relationship: FOV ≥ 80.95°, which is beneficial for achieving a wide-angle view. Preferably, FOV ≥ 81.78° is satisfied.

[0076] In this embodiment, the image height of the camera optical lens 10 is IH, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: TTL / IH≤1.59, which is beneficial for achieving ultra-thinness. Preferably, TTL / IH≤1.55 is satisfied.

[0077] When the focal length, focal length of each lens, and central radius of curvature of the camera optical lens 10 of the present invention satisfy the above-mentioned relationship, the camera optical lens 10 can have good optical performance and at the same time meet the design requirements of wide-angle and ultra-thin design. According to the characteristics of the camera optical lens 10, the camera optical lens 10 is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0078] 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.

[0079] TTL: Total optical length (the axial distance from the object surface of the first lens L1 to the image plane Si), in mm.

[0080] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0081] In addition, at least one of the object-side and / or image-side surfaces of each lens may be provided with a recurve point and / or a stagnation point to meet the requirements of high-quality imaging. Specific implementation schemes are described below.

[0082] The following shows Figure 1The design data for the camera optical lens 10 shown is as follows.

[0083] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0084] Table 1

[0085]

[0086]

[0087] The meanings of the symbols in the table above are as follows.

[0088] S1: Aperture;

[0089] R: Radius of curvature at the center of the optical surface;

[0090] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0091] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0092] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0093] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0094] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0095] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0096] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0097] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0098] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0099] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0100] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0101] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0102] R13: The center radius of curvature of the object side surface of the optical filter GF;

[0103] R14: Radius of curvature of the center of the image side of the optical filter GF;

[0104] d: Axial thickness of the lens, axial distance between lenses;

[0105] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0106] d1: On-axis thickness of the first lens L1;

[0107] 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;

[0108] d3: On-axis thickness of the second lens L2;

[0109] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0110] d5: On-axis thickness of the third lens L3;

[0111] 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;

[0112] d7: On-axis thickness of the fourth lens L4;

[0113] 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;

[0114] d9: On-axis thickness of the fifth lens L5;

[0115] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0116] d11: On-axis thickness of the sixth lens L6;

[0117] d12: The on-axis distance from the image side of the sixth lens L6 to the object side of the optical filter GF;

[0118] d13: On-axis thickness of the optical filter GF;

[0119] d14: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0120] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0121] nd1: The refractive index of the d-line of the first lens L1;

[0122] nd2: The refractive index of the d-line of the second lens L2;

[0123] nd3: The refractive index of the d-line of the third lens L3;

[0124] nd4: The refractive index of the d-line of the fourth lens L4;

[0125] nd5: The refractive index of the d-line of the fifth lens L5;

[0126] nd6: The refractive index of the d-line of the sixth lens L6;

[0127] ndg: The refractive index of the d-line of the optical filter GF;

[0128] vd: Abbe number;

[0129] v1: Abbe number of the first lens L1;

[0130] v2: Abbe number of the second lens L2;

[0131] v3: Abbe number of the third lens L3;

[0132] v4: Abbe number of the fourth lens L4;

[0133] v5: Abbe number of the fifth lens L5;

[0134] v6: Abbe number of the sixth lens L6;

[0135] vg: Abbe number of the optical filter GF.

[0136] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0137] Table 2

[0138]

[0139]

[0140] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (4). However, the present invention is not limited to the aspherical polynomial form represented by formula (4).

[0141] 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 (4)

[0142] 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).

[0143] Tables 3 and 4 show the inversion point and stagnation point design data of each lens in the camera optical lens 10 of this embodiment. Specifically, 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; and P6R1 and P6R2 represent the object-side and image-side surfaces of the sixth lens L6, respectively. The data in the "Inversion Point Position" column corresponds to the vertical distance from the inversion point set on the surface of each lens to the optical axis of the camera optical lens 10. The data in the "Stagnation Point Position" column corresponds to the vertical distance from the stagnation point set on the surface of each lens to the optical axis of the camera optical lens 10.

[0144] Table 3

[0145]

[0146]

[0147] Table 4

[0148] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 2 0.585 1.095 P2R1 0 / / P2R2 0 / / P3R1 1 1.185 / P3R2 0 / / P4R1 0 / / P4R2 0 / / P5R1 1 1.835 / P5R2 1 2.455 / P6R1 1 1.005 / P6R2 1 2.225 /

[0149] Figure 2 , Figure 3 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 588nm, and 486nm 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 588nm 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.

[0150] Table 13, which appears later, shows the values ​​of various parameters and the parameters specified in the conditional expressions in the first, second, and third embodiments.

[0151] As shown in Table 13, the first embodiment satisfies all the conditional expressions.

[0152] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 2.254 mm, the full field of view image height IH is 5.120 mm, and the field of view FOV in the diagonal direction is 86.51°. 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.

[0153] (Second Implementation)

[0154] Figure 5 This is a schematic diagram of the camera optical lens 20 in the second embodiment. The second embodiment is basically the same as the first embodiment. The meanings of the symbols in the following list are also the same as those in the first embodiment. Therefore, the same parts will not be repeated here. Only the differences are listed below.

[0155] In this embodiment, the image-side surface of the second lens L2 is concave near the axis, the image-side surface of the third lens L3 is convex near the axis, and the object-side surface of the fourth lens L4 is convex near the axis.

[0156] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0157] Table 5

[0158]

[0159] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0160] Table 6

[0161]

[0162]

[0163] Tables 7 and 8 show the design data for the inflection point and stagnation point of each lens in the camera optical lens 20.

[0164] Table 7

[0165]

[0166]

[0167] Table 8

[0168] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 1 0.675 / P2R1 1 1.015 / P2R2 1 0.705 / P3R1 1 1.405 / P3R2 1 0.915 / P4R1 2 1.315 1.685 P4R2 0 / / P5R1 1 1.445 / P5R2 1 1.265 / P6R1 1 0.095 / P6R2 1 2.185 /

[0169] Figure 6 , Figure 7Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 588nm, and 486nm 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 588nm 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.

[0170] As shown in Table 13 below, the camera optical lens 20 of this embodiment satisfies each conditional expression.

[0171] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 2.331 mm, the full field of view image height IH is 5.120 mm, and the field of view FOV in the diagonal direction is 82.60°. 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.

[0172] (Third Implementation)

[0173] Figure 9 This is a schematic diagram of the camera optical lens 30 in the third embodiment. The third embodiment is basically the same as the first embodiment. The meanings of the symbols in the following list are also the same as those in the first embodiment. Therefore, the same parts will not be repeated here. Only the differences are listed below.

[0174] In this embodiment, the image-side surface of the third lens L3 is convex at the paraxial position, the object-side surface of the fourth lens L4 is convex at the paraxial position, and the image-side surface of the fourth lens L4 is concave at the paraxial position.

[0175] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0176] Table 9

[0177]

[0178] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0179] Table 10

[0180]

[0181]

[0182] Tables 11 and 12 show the design data for the inflection point and stagnation point of each lens in the camera optical lens 30.

[0183] Table 11

[0184]

[0185]

[0186] Table 12

[0187] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 0 / / P2R1 0 / / P2R2 0 / / P3R1 0 / / P3R2 1 1.455 / P4R1 2 1.495 1.845 P4R2 1 0.555 / P5R1 1 1.765 / P5R2 2 1.745 2.155 P6R1 1 0.395 / P6R2 1 2.335 /

[0188] Figure 10 , Figure 11 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 588nm, and 486nm 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 588nm 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.

[0189] As shown in Table 13 below, the camera optical lens 30 of this embodiment satisfies each conditional expression.

[0190] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 2.321 mm, the full field of view image height IH is 5.120 mm, and the field of view FOV in the diagonal direction is 82.82°. 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.

[0191] Table 13

[0192] Parameters and conditional expressions Example 1 Example 2 Example 3 f2 / f5 0.51 1.00 1.49 R5 / d5 -29.99 -20.02 -10.01 (R1+R2) / (R1-R2) -20.00 -5.01 -10.00 f 5.636 5.827 5.802 f1 100.775 31.853 57.863 f2 4.977 9.259 7.326 f3 -11.837 -11.902 -8.880 f4 901.458 10.669 97.580 f5 9.836 9.258 4.917 f6 -6.138 -4.318 -4.484 f12 4.846 7.325 6.632 FNO 2.50 2.50 2.50 TTL 7.580 7.613 7.766 FOV 86.51° 82.60° 82.82° IH 5.120 5.120 5.120

[0193] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A camera optical lens, characterized in that, The camera optical lens comprises six lenses, which are arranged from the object side to the image side as follows: a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power. 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 object-side surface of the second lens is convex near the axis; The object-side surface of the third lens is concave near the axis; 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 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 second lens has a focal length of f2, the fifth lens has a focal length of f5, 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 central radius of curvature of the object-side surface of the third lens is R5, and the axial thickness of the third lens is d5, satisfying the following relationship: 0.50≤f2 / f5≤1.50; -30.00≤R5 / d5≤-10.00; -20.00≤(R1+R2) / (R1-R2)≤-5.

00.

2. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, the focal length of the first lens is f1, the on-axis thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and they satisfy the following relationship: 2.73≤f1 / f≤26.82; 0.02≤d1 / TTL≤0.

10.

3. The camera optical lens according to claim 2, characterized in that, The camera optical lens satisfies the following relationship: 4.37≤f1 / f≤21.46; 0.04≤d1 / TTL≤0.

08.

4. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, 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 on-axis thickness of the second lens is d3, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.44≤f² / f≤2.38; -4.05≤(R3+R4) / (R3-R4)≤-0.23; 0.03≤d3 / TTL≤0.

12.

5. The camera optical lens according to claim 4, characterized in that, The camera optical lens satisfies the following relationship: 0.71≤f² / f≤1.91; -2.53≤(R3+R4) / (R3-R4)≤-0.28; 0.04≤d3 / TTL≤0.

10.

6. The camera optical lens according to claim 1, characterized in that, 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 image-side surface of the third lens is R6, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -4.20≤f3 / f≤-1.02; -3.19≤(R5+R6) / (R5-R6)≤-0.51; 0.02≤d5 / TTL≤0.

10.

7. The camera optical lens according to claim 6, characterized in that, The camera optical lens satisfies the following relationship: -2.63≤f3 / f≤-1.28; -2.00≤(R5+R6) / (R5-R6)≤-0.64; 0.03≤d5 / TTL≤0.

08.

8. The camera optical lens according to claim 1, characterized in that, 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: 0.92≤f4 / f≤239.91; -191.87≤(R7+R8) / (R7-R8)≤-0.06; 0.07≤d7 / TTL≤0.

26.

9. The camera optical lens according to claim 8, characterized in that, The camera optical lens satisfies the following relationship: 1.46≤f4 / f≤191.93; -119.92≤(R7+R8) / (R7-R8)≤-0.08; 0.11≤d7 / TTL≤0.

21.

10. The camera optical lens according to claim 1, characterized in that, 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: 0.42≤f5 / f≤2.62; -6.33≤(R9+R10) / (R9-R10)≤-0.88; 0.03≤d9 / TTL≤0.

16.

11. The camera optical lens according to claim 10, characterized in that, The camera optical lens satisfies the following relationship: 0.68≤f5 / f≤2.09; -3.96≤(R9+R10) / (R9-R10)≤-1.09; 0.05≤d9 / TTL≤0.

13.

12. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the central radius of curvature of the object side of the sixth lens is R11, the central radius of curvature of the image side of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -2.18≤f6 / f≤-0.49; 0.51≤(R11+R12) / (R11-R12)≤4.05; 0.05≤d11 / TTL≤0.

23.

13. The camera optical lens according to claim 12, characterized in that, The camera optical lens satisfies the following relationship: -1.36≤f6 / f≤-0.62; 0.81≤(R11+R12) / (R11-R12)≤3.24; 0.08≤d11 / TTL≤0.

18.

14. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, and the combined focal length of the first lens and the second lens is f12, satisfying the following relationship: 0.43≤f12 / f≤1.

89.

15. 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.

58.

16. The camera optical lens according to claim 1, characterized in that, The field of view (FOV) along the diagonal direction of the camera optical lens is defined as FOV, and satisfies the following relationship: FOV ≥ 80.95°.

17. 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: TTL / IH≤1.59.

Images