Camera lens

Abstract

The application relates to the field of optical lenses, and discloses a camera optical lens which comprises, in sequence from the object side to the image side, a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power; wherein the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2, the total optical length of the camera optical lens is TTL, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the following relationships are satisfied: 0.10 <= d2 / TTL <= 0.20; 0.60 <= f3 / f4 <= 1.40; 0.01 <= R7 / R8 <= 0.30.

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, PC lenses, and automotive lenses. Background Technology

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera lenses has been increasing. Due to the shrinking pixel size of image sensors and the current trend in electronic products towards high functionality and lightweight portability, miniaturized camera lenses with good image quality have become mainstream in the market. To achieve better image quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasingly diverse user needs, as the pixel area of ​​image sensors continues to shrink and system requirements for image quality continue to rise, six-element lens structures are gradually appearing in lens designs. There is an urgent need for camera lenses with excellent optical performance. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a camera optical lens that meets the design requirements for good optical performance.

[0004] To solve the above-mentioned technical problems, the embodiments of the present invention provide a camera optical lens, which comprises, from the object side to the image side, the following in sequence: a first lens having negative refractive power, a second lens having negative refractive power, a third lens having positive 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] Wherein, the axial distance from the image-side surface of the first lens to the object-side surface of the second lens is d2, the total optical length of the imaging optical lens is TTL, the focal length of the third lens is f3, 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, and the central radius of curvature of the image-side surface of the fourth lens is R8, and the following relationship is satisfied:

[0006] 0.10≤d2 / TTL≤0.20;

[0007] 0.60≤f3 / f4≤1.40;

[0008] 0.01≤R7 / R8≤0.30.

[0009] Preferably, the central radius of curvature of the object side of the first lens is R1, and the central radius of curvature of the image side of the first lens is R2, and the following relationship is satisfied:

[0010] 1.80≤(R1+R2) / (R1-R2)≤6.30.

[0011] Preferably, the fifth lens and the sixth lens are cemented together.

[0012] Preferably, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, and the following relationship is satisfied: V5-V6≥35.00.

[0013] Preferably, the focal length of the camera optical lens is f, and satisfies the following relationship: 5.00≤TTL / f≤7.00.

[0014] 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 imaging optical lens is f, the focal length of the first lens is f1, and the on-axis thickness of the first lens is d1, and they satisfy the following relationship:

[0015] -6.21≤f1 / f≤-0.97;

[0016] 0.01≤d1 / TTL≤0.10.

[0017] Preferably, the object-side surface of the second lens is concave at the paraxial position, and the image-side surface of the second 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 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, and the on-axis thickness of the second lens is d3, and the following relationship is satisfied:

[0018] -21.11≤f² / f≤-3.75;

[0019] -9.81≤(R3+R4) / (R3-R4)≤-2.45;

[0020] 0.06≤d3 / TTL≤0.26.

[0021] Preferably, the object-side surface of the third lens is convex at the paraxial position; the image-side surface of the third lens is convex at the paraxial position; the focal length of the camera optical lens is f, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, and the axial thickness of the third lens is d5, and the following relationship is satisfied:

[0022] 1.18≤f³ / f≤5.80;

[0023] -1.96≤(R5+R6) / (R5-R6)≤-0.31;

[0024] 0.02≤d5 / TTL≤0.26.

[0025] Preferably, the object-side surface of the fourth lens is convex at the paraxial position, and the image-side surface of the fourth lens is concave at the paraxial position; the focal length of the imaging optical lens is f, and the on-axis thickness of the fourth lens is d7, and the following relationship is satisfied:

[0026] 1.29≤f4 / f≤5.84;

[0027] -3.71≤(R7+R8) / (R7-R8)≤-0.68;

[0028] 0.07≤d7 / TTL≤0.26.

[0029] 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 also convex at the paraxial position; the focal length of the camera optical lens is f, 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, and the on-axis thickness of the fifth lens is d9, and the following relationship is satisfied:

[0030] 0.56≤f5 / f≤2.34;

[0031] 0.13≤(R9+R10) / (R9-R10)≤0.50;

[0032] 0.05≤d9 / TTL≤0.18.

[0033] Preferably, the object-side surface of the sixth lens is concave near the axis, and the image-side surface of the sixth lens is convex near the axis; the focal length of the imaging 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, and the axial thickness of the sixth lens is d11, satisfying the following relationship:

[0034] -4.36≤f6 / f≤-0.83;

[0035] -3.71≤(R11+R12) / (R11-R12)≤-0.72;

[0036] 0.03≤d11 / TTL≤0.13.

[0037] Preferably, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are made of glass.

[0038] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical characteristics and good optical performance, and is especially suitable for vehicle lenses and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0039] 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:

[0040] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0042] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0043] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0044] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0045] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0046] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0047] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0048] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0049] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0050] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0051] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0052] Figure 13 This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0053] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0054] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0055] Figure 16 yes Figure 13 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0056] Figure 17 This is a schematic diagram of the structure of the camera optical lens according to the fifth embodiment of the present invention;

[0057] Figure 18 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown;

[0058] Figure 19 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0059] Figure 20 yes Figure 17 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0060] Figure 21 This is a schematic diagram of the structure of the camera optical lens according to the sixth embodiment of the present invention;

[0061] Figure 22 yes Figure 21 A schematic diagram of axial aberrations of the camera optical lens shown;

[0062] Figure 23 yes Figure 21 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0063] Figure 24 yes Figure 21 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0064] Figure 25 This is a schematic diagram of the structure of the camera optical lens according to a comparative embodiment of the present invention;

[0065] Figure 26 yes Figure 25 A schematic diagram of axial aberrations of the camera optical lens shown;

[0066] Figure 27 yes Figure 25 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0067] Figure 28 yes Figure 25 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0068] 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.

[0069] Referring to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40, 50, 60. Figure 1 , 5 Figures 9, 13, 17, and 21 show the imaging optical lenses 10, 20, 30, 40, 50, and 60 of the present invention, which together comprise six lenses. Specifically, the imaging optical lenses 10, 20, 30, 40, 50, and 60, from the object side to the image side, are as follows: first lens L1, second lens L2, aperture S1, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6. An optical filter GF or other optical element may be disposed between the sixth lens L6 and the image plane Si.

[0070] The first lens L1 has negative refractive power, the second lens L1 has negative refractive power, the third lens L3 has positive 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. In other embodiments, each lens may also have other refractive powers.

[0071] The axial distance from the image side of the first lens L1 to the object side of the second lens L2 is defined as d2, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.10≤d2 / TTL≤0.20. This relationship specifies the ratio of the distance between the two lenses, the first lens L1 and the second lens L2, to the total optical length. Within the range of the relationship, a value higher than the lower limit helps to ensure a smooth transition of light near the aperture stop, which can effectively balance the field curvature of the camera lens and make the field curvature shift of the central field of view less than 0.01mm; a value lower than the upper limit helps to control the total optical length of the camera lens.

[0072] The focal length of the third lens L3 is f3, and the focal length of the fourth lens L4 is f4, satisfying the following relationship: 0.60≤f3 / f4≤1.40. This relationship defines the ratio of the focal lengths of the third lens L3 and the fourth lens L4. The close focal lengths of the two lenses help to smooth the light transition and improve image quality.

[0073] The center radius of curvature of the object side of the fourth lens L4 is R7, and the center radius of curvature of the image side of the fourth lens L4 is R8, satisfying the following relationship: 0.01≤R7 / R8≤0.30. This relationship defines the shape of the fourth lens L4. Within the range of the relationship, it is beneficial to reduce the degree of light deflection after passing through the lens, so that the camera optical lens has better imaging quality and lower sensitivity.

[0074] Under the condition of satisfying the above relationships, the camera optical lenses 10, 20, 30, 40, 50, and 60 have good optical performance and can meet the design requirements of large aperture and wide angle. Based on the characteristics of the camera optical lenses 10, 20, 30, 40, 50, and 60, they are particularly suitable for automotive lenses and WEB camera lenses composed of high-pixel CCD, CMOS and other imaging elements.

[0075] Based on the above relationships and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0076] 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 glass. Appropriate selection of glass lenses can improve the optical performance of the camera lens. In other optional embodiments, the lenses can also be made of other materials.

[0077] The first lens L1 is an aspherical lens, the second lens L2 is a spherical lens, the third lens L3 is a spherical lens, the fourth lens L4 is an aspherical lens, the fifth lens L5 is a spherical lens, and the sixth lens L6 is a spherical lens.

[0078] The center radius of curvature of the object side of the first lens L1 is defined as R1, and the center radius of curvature of the image side of the first lens L1 is defined as R2, satisfying the following relationship: 1.80≤(R1+R2) / (R1-R2)≤6.30. This relationship specifies the shape of the first lens L1. Within the range of the relationship, the degree of light deflection through the lens can be mitigated, effectively improving aberrations and enhancing image quality.

[0079] The fifth lens L5 and the sixth lens L6 are cemented together. This cementing method reduces the overall size of the camera lens. Furthermore, by cementing the two lenses into a single integrated structure, they can be installed in a single placement during the assembly of the optical module.

[0080] The Abbe number of the fifth lens L5 is defined as v5, and the Abbe number of the sixth lens L6 is defined as v6, satisfying the following relationship: v5-v6≥35.00. This relationship specifies the difference between the Abbe numbers of the cemented fifth lens L5 and the sixth lens L6. Within this range, material properties can be effectively allocated, chromatic aberration can be effectively corrected, and the chromatic aberration |LC|≤8μm can be achieved.

[0081] The focal length of the camera optical lens 10 is defined as f, satisfying the following relationship: 5.00 ≤ TTL / f ≤ 7.00, which specifies the telephoto ratio. By limiting the focal length to the upper limit of the relationship, the overall optical length can be shortened, facilitating miniaturization. On the other hand, by limiting the focal length to the lower limit of the relationship, distortion and on-axis chromatic aberration can be easily corrected, maintaining good optical performance.

[0082] 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. 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.

[0083] The focal length of the first lens is defined as f1, satisfying the following relationship: -6.21≤f1 / f≤-0.97, which specifies the ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens 10. Within this range, it helps to achieve an ultra-wide-angle lens. Preferably, it satisfies -3.88≤f1 / f≤-1.22.

[0084] The axial thickness of the first lens L1 is defined as d1, satisfying the following relationship: 0.01≤d1 / TTL≤0.10. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.02≤d1 / TTL≤0.08.

[0085] In this embodiment, the object-side surface of the second lens L2 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 second lens L2 may also be configured with other concave and convex distributions.

[0086] In this embodiment, the focal length of the second lens L2 is f2, satisfying the following relationship: -21.11≤f2 / f≤-3.75, which defines the ratio of the focal length f2 of the second lens L2 to the focal length of the imaging optical lens 10. Within this range, the field curvature of the system can be effectively balanced. Preferably, it satisfies -13.19≤f2 / f≤-4.69.

[0087] The center radius of curvature of the object-side surface of the second lens L2 is R3, and the center radius of curvature of the image-side surface of the second lens L2 is R4, satisfying the relationship: -9.81≤(R3+R4) / (R3-R4)≤-2.45. This relationship defines the shape of the second lens L2. Within the range of this relationship, with the development of wide-angle lenses, it is beneficial to correct problems such as on-axis chromatic aberration. Preferably, it satisfies -6.13≤(R3+R4) / (R3-R4)≤-3.06.

[0088] The axial thickness of the second lens L2 is d3, which satisfies the following relationship: 0.06 ≤ d3 / TTL ≤ 0.26. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.10 ≤ d3 / TTL ≤ 0.21.

[0089] The object-side surface of the third lens L3 is convex near the axis, and the image-side surface is also convex near the axis. In other alternative embodiments, the object-side surface and image-side surface of the third lens L3 may also be configured with other concave and convex distributions.

[0090] The camera optical lens 10 also satisfies the following relationship: 1.18 ≤ f3 / f ≤ 5.80. When f3 / f satisfies the above relationship, controlling the focal length of a single lens and rationally allocating the focal length is beneficial for controlling temperature drift and improving temperature performance. Preferably, it satisfies 1.89 ≤ f3 / f ≤ 4.64.

[0091] 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: -1.96≤(R5+R6) / (R5-R6)≤-0.31, which defines the shape of the third lens L3. Within this range, the degree of light refraction can be reduced, effectively correcting chromatic aberration. Preferably, it satisfies -1.22≤(R5+R6) / (R5-R6)≤-0.38.

[0092] The on-axis thickness of the third lens L3 is d5, satisfying the following relationship: 0.02≤d5 / TTL≤0.26. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.04≤d5 / TTL≤0.20.

[0093] In this embodiment, the object-side surface of the fourth lens L4 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 fourth lens L4 may also be configured with other concave and convex distributions.

[0094] The camera optical lens 10 also satisfies the following relationship: 1.29 ≤ f4 / f ≤ 5.84. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 2.06 ≤ f4 / f ≤ 4.67.

[0095] 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: -3.71≤(R7+R8) / (R7-R8)≤-0.68. This defines the shape of the fourth lens L4. Within this range, with the development of telephoto lenses, it is beneficial for correcting aberrations at off-axis angles. Preferably, it satisfies -2.32≤(R7+R8) / (R7-R8)≤-0.85.

[0096] The on-axis thickness of the fourth lens L4 is d7, satisfying the following relationship: 0.07≤d7 / TTL≤0.26. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.11≤d7 / TTL≤0.21.

[0097] In this embodiment, the object-side surface of the fifth lens L5 is convex near the axis, and the image-side surface is also convex near the axis. In other optional embodiments, the object-side surface and image-side surface of the fifth lens L5 may also be configured with other concave and convex distributions.

[0098] The focal length of the fifth lens L5 is f5, satisfying the following relationship: 0.56 ≤ f5 / f ≤ 2.34. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 0.89 ≤ f5 / f ≤ 1.87.

[0099] 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: 0.13≤(R9+R10) / (R9-R10)≤0.50, which defines the shape of the fifth lens L5. Within this range, with the development of wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 0.21≤(R9+R10) / (R9-R10)≤0.40.

[0100] The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.05≤d9 / TTL≤0.18. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.08≤d9 / TTL≤0.14.

[0101] In this embodiment, the object-side surface of the sixth lens L6 is concave near the axis, and the image-side surface is convex near the axis. 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.

[0102] The focal length of the sixth lens L6 is defined as f6, satisfying the following relationship: -4.36 ≤ f6 / f ≤ -0.83. This relationship specifies that the last lens, the sixth lens L6, has a short focal length, which, within the range of the relationship, helps to collect light and ensures sufficient light transmission. Preferably, it satisfies -2.73 ≤ f6 / f ≤ -1.03.

[0103] The center radius of curvature of the object-side surface of the sixth lens L6 is R11, and the center radius of curvature of the image-side surface of the sixth lens L6 is R12, satisfying the following relationship: -3.71≤(R11+R12) / (R11-R12)≤-0.72. This defines the shape of the sixth lens L6, which helps to smooth the light transition and improve image quality. Preferably, it satisfies -2.32≤(R11+R12) / (R11-R12)≤-0.90.

[0104] The axial thickness of the sixth lens L6 is d11, satisfying the following relationship: 0.03≤d11 / TTL≤0.13. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.06≤d11 / TTL≤0.11.

[0105] The camera optical lens of the present invention will be described below with examples. The symbols used in the examples are shown below. The units for focal length, on-axis distance, center radius of curvature, and on-axis thickness are mm.

[0106] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0107] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0108] The technical solution of the present invention will be described in detail below with six embodiments. At the same time, a comparative embodiment is provided for reference. The technical effects of the present invention cannot be achieved when the above-mentioned relationship is not exceeded.

[0109] (First Implementation)

[0110] Table 1 shows the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0111] Table 1

[0112]

[0113] The meanings of each symbol are as follows.

[0114] S1: Aperture;

[0115] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0116] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0117] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0118] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0119] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0120] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0121] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0122] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0123] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0124] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0125] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0126] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0127] R13: The center radius of curvature of the object side surface of the optical filter GF;

[0128] R14: Radius of curvature of the center of the image side of the optical filter GF;

[0129] d: Axial thickness of the lens, axial distance between lenses;

[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 on-axis distance from the image side of the sixth lens L6 to the object side of the optical filter GF;

[0142] d13: On-axis thickness of the optical filter GF;

[0143] d14: The on-axis distance from the image-side surface of the optical filter GF to the image plane Si;

[0144] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0145] nd1: The refractive index of the d-line of the first lens L1;

[0146] nd2: The refractive index of the d-line of the second lens L2;

[0147] nd3: The refractive index of the d-line of the third lens L3;

[0148] nd4: The refractive index of the d-line of the fourth lens L4;

[0149] nd5: The refractive index of the d-line of the fifth lens L5;

[0150] nd6: The refractive index of the d-line of the sixth lens L6;

[0151] ndg: The refractive index of the d-line of the optical filter GF;

[0152] vd: Abbe number;

[0153] v1: Abbe number of the first lens L1;

[0154] v2: Abbe number of the second lens L2;

[0155] v3: Abbe number of the third lens L3;

[0156] v4: Abbe number of the fourth lens L4;

[0157] v5: Abbe number of the fifth lens L5;

[0158] v6: Abbe number of the sixth lens L6;

[0159] vg: Abbe number of the optical filter GF.

[0160] Table 2 shows the aspherical data of the first lens L1 and the fourth lens L4 in the camera optical lens 10 of the first embodiment of the present invention.

[0161] Table 2

[0162]

[0163] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0164] 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 +A

[0165] 16r 16 (1)

[0166] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, and A16 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).

[0167] Figure 2 , Figure 3 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 700nm, 625nm, 550nm, 500nm and 450nm passes through the camera optical lens 10 of the first embodiment. Figure 4This shows a schematic diagram of field curvature and distortion after light with a wavelength of 550nm 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.

[0168] Table 15, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in the formulas in each embodiment.

[0169] As shown in Table 15, the first embodiment satisfies all the relations.

[0170] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 3.036 mm, the full field of view image height IH is 4.032 mm, and the field of view angle FOV in the diagonal direction is 128.00°. The camera optical lens 10 has good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0171] (Second Implementation)

[0172] The second implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0173] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0174] Table 3 shows the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0175] Table 3

[0176]

[0177] Table 4 shows the aspherical data of the first lens L1 and the fourth lens L4 in the camera optical lens 20 of the second embodiment of the present invention.

[0178] Table 4

[0179]

[0180] Figure 6 , Figure 7 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 700nm, 625nm, 550nm, 500nm and 450nm 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 550nm 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.

[0181] As shown in Table 15, the second embodiment satisfies all the relationships.

[0182] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 2.693 mm, the full field of view image height IH is 3.768 mm, and the field of view angle FOV in the diagonal direction is 128.00°. The camera optical lens 20 has good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0183] (Third Implementation)

[0184] The third implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0185] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0186] Table 5 shows the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0187] Table 5

[0188]

[0189]

[0190] Table 6 shows the aspherical data of the first lens L1 and the fourth lens L4 in the camera optical lens 30 of the third embodiment of the present invention.

[0191] Table 6

[0192]

[0193] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 700nm, 625nm, 550nm, 500nm and 450nm 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 550nm 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.

[0194] Table 15 below lists the values ​​of each relation in this embodiment according to the above-described relationships. Clearly, the camera optical lens 30 of this embodiment satisfies the above-described relationships.

[0195] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.183 mm, the full field of view image height IH is 4.026 mm, and the field of view angle FOV in the diagonal direction is 128.00°. The camera optical lens 30 has good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0196] (Fourth Implementation)

[0197] The fourth implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0198] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0199] Table 7 shows the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0200] Table 7

[0201]

[0202] Table 8 shows the aspherical data of the first lens L1 and the fourth lens L4 in the camera optical lens 40 of the fourth embodiment of the present invention.

[0203] Table 8

[0204]

[0205]

[0206] Figure 14 , Figure 15 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 700nm, 625nm, 550nm, 500nm and 450nm 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 550nm 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.

[0207] Table 15 below lists the values ​​of each relation in this embodiment according to the above-described relationships. Clearly, the camera optical lens 40 of this embodiment satisfies the above-described relationships.

[0208] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 3.150 mm, the full field of view image height IH is 4.201 mm, and the field of view angle FOV in the diagonal direction is 128.00°. The camera optical lens 40 has good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0209] (Fifth Implementation)

[0210] The fifth embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0211] Figure 17 The image shown is a camera optical lens 50 according to the fifth embodiment of the present invention.

[0212] Table 9 shows the design data of the camera optical lens 50 according to the fifth embodiment of the present invention.

[0213] Table 9

[0214]

[0215]

[0216] Table 10 shows the aspherical data of the first lens L1 and the fourth lens L4 in the camera optical lens 50 of the fifth embodiment of the present invention.

[0217] Table 10

[0218]

[0219] Figure 18 , Figure 19 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 700nm, 625nm, 550nm, 500nm and 450nm passes through the camera optical lens 50 of the fifth embodiment. Figure 20 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 550nm passes through the camera optical lens 50 of the fifth embodiment. Figure 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0220] Table 15 below lists the values ​​of each relation in this embodiment according to the above-described relationships. Clearly, the camera optical lens 50 of this embodiment satisfies the above-described relationships.

[0221] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 3.093mm, the full field of view image height IH is 4.068mm, and the field of view angle FOV in the diagonal direction is 128.00°. The camera optical lens 50 has good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0222] (Sixth Implementation Method)

[0223] The sixth embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0224] Figure 21 The image shown is a camera optical lens 60 according to the sixth embodiment of the present invention.

[0225] Table 11 shows the design data of the camera optical lens 60 according to the sixth embodiment of the present invention.

[0226] Table 11

[0227]

[0228] Table 12 shows the aspherical data of the first lens L1 and the fourth lens L4 in the camera optical lens 60 of the sixth embodiment of the present invention.

[0229] Table 12

[0230]

[0231]

[0232] Figure 22 , Figure 23 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 700nm, 625nm, 550nm, 500nm and 450nm passes through the camera optical lens 60 of the fifth embodiment. Figure 24 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 550nm passes through the camera optical lens 60 of the sixth embodiment. Figure 24 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0233] Table 15 below lists the values ​​of each relation in this embodiment according to the above-described relationships. Clearly, the camera optical lens 60 of this embodiment satisfies the above-described relationships.

[0234] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 2.445mm, the full field of view image height IH is 3.648mm, and the field of view angle FOV in the diagonal direction is 128.00°. The camera optical lens 60 has good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0235] (Comparative Implementation Methods)

[0236] The comparative implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0237] Figure 25 The image shows a camera lens 70 according to a comparative embodiment.

[0238] Table 13 shows the design data for the camera optical lens 70 of the comparative embodiment.

[0239] Table 13

[0240]

[0241]

[0242] Table 14 shows the aspherical data of the first lens L1 and the fourth lens L4 in the camera optical lens 70 of the comparative embodiment of the present invention.

[0243] Table 14

[0244]

[0245] Figure 26 , Figure 27 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 700nm, 625nm, 550nm, 500nm, and 450nm after passing through the camera optical lens 70 of the comparative embodiment. Figure 28 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 550nm passes through the camera optical lens 70 of the comparative embodiment. Figure 28 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0246] Table 15 below lists the values ​​of each relation in this embodiment according to the above-described relationships. Clearly, the camera optical lens 70 of this embodiment satisfies the above-described relationships.

[0247] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 70 is 2.877 mm, the full field of view image height IH is 4.003 mm, and the field of view angle FOV in the diagonal direction is 128.00°.

[0248] Table 15 below lists the values ​​of each relation in the comparative embodiment according to the above-described relationships. Clearly, the camera optical lens 70 in the comparative embodiment does not satisfy the above-described relationship 0.10≤d² / TTL≤0.20, and therefore cannot balance the field curvature of the system.

[0249] Table 15

[0250]

[0251] 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 six lenses, which, from the object side to the image side, are sequentially arranged as follows: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive 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 fifth lens and the sixth lens are cemented together. 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... The second lens has a concave paraxial surface, and the image-side surface of the third lens is convex paraxially; the object-side surface of the third lens is convex paraxially; the image-side surface of the third lens is convex paraxially; the object-side surface of the fourth lens is convex paraxially, and the image-side surface of the fourth lens is concave paraxially; the object-side surface of the fifth lens is convex paraxially, and the image-side surface of the fifth lens is convex paraxially; the object-side surface of the sixth lens is concave paraxially, and the image-side surface of the sixth lens is convex paraxially. Wherein, the axial distance from the image-side surface of the first lens to the object-side surface of the second lens is d2, the axial thickness of the third lens is d5, the total optical length of the camera lens is TTL, the focal length of the camera lens is f, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, the central radius of curvature of the object-side surface of the fourth lens is R7, and the central radius of curvature of the image-side surface of the fourth lens is R8, and the following relationship is satisfied: 0.10≤d2 / TTL≤0.20; 0.60≤f3 / f4≤1.40; 0.01≤R7 / R8≤0.30, 1.18≤f³ / f≤5.80; -1.96≤(R5+R6) / (R5-R6)≤-0.31; 0.02≤d5 / TTL≤0.

26.

2. 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, and the central radius of curvature of the image-side surface of the first lens is R2, and they satisfy the following relationship: 1.80≤(R1+R2) / (R1-R2)≤6.

30.

3. The camera optical lens according to claim 1, characterized in that, The Abbe number of the fifth lens is V5, and the Abbe number of the sixth lens is V6, and they satisfy the following relationship: V5-V6≥35.

00.

4. The camera optical lens according to claim 1, characterized in that, The camera optical lens also satisfies the following relationship: 5.00≤TTL / f≤7.

00.

5. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the on-axis thickness of the first lens is d1, and the following relationship is satisfied: -6.21≤f1 / f≤-0.97; 0.01≤d1 / TTL≤0.

10.

6. The camera optical lens according to claim 1, characterized in that, The focal length of the second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, and the axial thickness of the second lens is d3, and the following relationship is satisfied: -13.19≤f² / f≤-4.69; -9.81≤(R3+R4) / (R3-R4)≤-2.45; 0.06≤d3 / TTL≤0.

26.

7. The camera optical lens according to claim 1, characterized in that, The fourth lens has an on-axis thickness of d7 and satisfies the following relationship: 1.29≤f4 / f≤5.84; -3.71≤(R7+R8) / (R7-R8)≤-0.68; 0.07≤d7 / TTL≤0.

26.

8. 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, and an axial thickness of d9, and satisfies the following relationship: 0.56≤f5 / f≤2.34; 0.13≤(R9+R10) / (R9-R10)≤0.50; 0.05≤d9 / TTL≤0.

18.

9. 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, and the axial thickness of the sixth lens is d11, and they satisfy the following relationship: -4.36≤f6 / f≤-0.83; -3.71≤(R11+R12) / (R11-R12)≤-0.72; 0.03≤d11 / TTL≤0.

13.

10. The camera optical lens according to claim 1, characterized in that, The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are made of glass.

Images