Camera lens

Abstract

This invention relates to the field of optical lenses and discloses a camera optical lens comprising six lenses in sequence: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power; the focal length of the camera optical lens is f, the focal lengths of the fifth and sixth lenses are f5 and f6, respectively, and the on-axis thicknesses of the first, second, and third lenses are d1, d3, and d5, respectively. The axial distance from the image side of the first lens to the object side of the second lens is d2, the axial distance from the image side of the second lens to the object side of the third lens is d4, and the central radii of curvature of the object side and image side of the first lens at the paraxial position are R1 and R2, respectively, and satisfy the following relationships: 3.00≤(f5-f6) / f≤4.00; 2.00≤(d1+d3+d5) / (d2+d4)≤4.50; -1.30≤(R1+R2) / (R1-R2)≤-1.05.

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 the 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 wide-angle camera lenses with excellent optical characteristics, large apertures, wide angles, ultra-thin designs, 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, while possessing excellent optical performance, meets the design requirements of adequate aberration correction, large aperture, wide-angle capability, and ultra-thin design.

[0004] To achieve the above objectives, the present invention provides a camera optical lens comprising six lenses, which, from the object side to the image side, are sequentially: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power; wherein the focal length of the camera optical lens is f, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the axial thickness of the first lens is d1, the axial thickness of the second lens is d3, the axial thickness of the third lens is d5, the axial distance from the image side of the first lens to the object side of the second lens is d2, the axial distance from the image side of the second lens to the object side of the third lens is d4, the central radius of curvature of the object side of the first lens at the paraxial position is R1, and the central radius of curvature of the image side of the first lens at the paraxial position is R2, and satisfy the following relationship:

[0005] 3.00≤(f5-f6) / f≤4.00;

[0006] 2.00≤(d1+d3+d5) / (d2+d4)≤4.50;

[0007] -1.30≤(R1+R2) / (R1-R2)≤-1.05.

[0008] Preferably, the axial distance from the image-side surface of the sixth lens to the image plane is BF, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship:

[0009] 0.15≤BF / TTL≤0.24.

[0010] Preferably, the central radius of curvature of the object-side surface of the fifth lens at the paraxial position is R9, and the central radius of curvature of the image-side surface of the fifth lens at the paraxial position is R10, satisfying the following relationship:

[0011] 0.55≤(R9+R10) / (R9-R10)≤0.90.

[0012] Preferably, the object-side surface of the first lens is concave at the paraxial position, and the image-side surface of the first lens is convex at the paraxial position; the focal length of the first lens is f1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0013] -3.64≤f1 / f≤-1.05;

[0014] 0.03≤d1 / TTL≤0.11.

[0015] Preferably, the object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position; the focal length of the second lens is f2, the central radius of curvature of the object-side surface of the second lens at the paraxial position is R3, the central radius of curvature of the image-side surface of the second lens at the paraxial position is R4, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0016] 2.02≤f² / f≤8.04;

[0017] -19.49≤(R3+R4) / (R3-R4)≤-4.64;

[0018] 0.03≤d3 / TTL≤0.15.

[0019] Preferably, the object-side surface of the third lens is convex at the paraxial position, and the image-side surface of the third lens is convex at the paraxial position; the focal length of the third lens is f3, the central radius of curvature of the object-side surface of the third lens at the paraxial position is R5, the central radius of curvature of the image-side surface of the third lens at the paraxial position is R6, and the total optical length of the camera lens is TTL, and satisfies the following relationship:

[0020] 0.52≤f3 / f≤1.69;

[0021] 0.06≤(R5+R6) / (R5-R6)≤0.23;

[0022] 0.06≤d5 / TTL≤0.24.

[0023] Preferably, the object-side surface of the fourth lens is concave at the paraxial position; the focal length of the fourth lens is f4, the central radius of curvature of the object-side surface of the fourth lens at the paraxial position is R7, the central radius of curvature of the image-side surface of the fourth lens at the paraxial position is R8, the on-axis thickness of the fourth lens is d7, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0024] -6.59≤f4 / f≤-2.01;

[0025] -2.08≤(R7+R8) / (R7-R8)≤-0.64;

[0026] 0.02≤d7 / TTL≤0.07.

[0027] Preferably, the object-side surface of the fifth lens is convex at the paraxial position; the image-side surface of the fifth lens is convex at the paraxial position; the axial thickness of the fifth lens is d9; the total optical length of the imaging optical lens is TTL; and the following relationship is satisfied:

[0028] 0.58 ≤ f5 / f ≤ 2.25;

[0029] 0.07≤d9 / TTL≤0.24.

[0030] Preferably, the object-side surface of the sixth lens is convex at the paraxial position, and the image-side surface of the sixth lens is concave at the paraxial position; the central radius of curvature of the object-side surface of the sixth lens at the paraxial position is R11, the central radius of curvature of the image-side surface of the sixth lens at the paraxial position is R12, the axial thickness of the sixth lens is d11, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0031] -5.00≤f6 / f≤-1.23;

[0032] 1.39≤(R11+R12) / (R11-R12)≤4.70;

[0033] 0.06≤d11 / TTL≤0.22.

[0034] Preferably, the aperture value of the camera optical lens is FNO, and satisfies: FNO≤2.27.

[0035] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical characteristics, and has the characteristics of sufficient aberration correction, large aperture, wide angle and ultra-thinness. It is especially suitable for mobile phone camera lens assemblies and WEB camera lenses and automotive lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0036] 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:

[0037] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0038] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0039] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0040] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0041] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0042] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0043] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0044] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0045] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0046] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0047] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0048] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0049] Figure 13 This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0050] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0051] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0052] Figure 16 yes Figure 13 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0053] Figure 17 This is a schematic diagram of the structure of the camera optical lens according to a comparative embodiment of the present invention;

[0054] Figure 18 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown;

[0055] Figure 19 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0056] Figure 20 yes Figure 17 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0057] 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.

[0058] Reference Appendix Figures 1-16 The technical solution of the present invention provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5Figures 9 and 13 show the imaging optical lenses 10, 20, 30, and 40 of the present invention, which together comprise six lenses. Specifically, the imaging optical lenses, 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.

[0059] Lens L1, Lens L2, Lens L3, Lens L4, Lens L5, and Lens L6 are all made of plastic. Other materials may also be used for the lenses.

[0060] The focal length of the camera optical lens is defined as f, the focal length of the fifth lens L5 is f5, and the focal length of the sixth lens L6 is f6, satisfying the following relationship: 3.00≤(f5-f6) / f≤4.00. Within the range of the condition, by reasonably allocating the optical focal length of the optical system, the optical system can have better imaging quality and lower sensitivity.

[0061] Define the on-axis thickness of the first lens L1 as d1, the on-axis thickness of the second lens L2 as d3, and the on-axis thickness of the third lens L3 as d5. Define the on-axis distance from the image side of the first lens L1 to the object side of the second lens L2 as d2, and the on-axis distance from the image side of the second lens L2 to the object side of the third lens L3 as d4. The following relationship is satisfied: 2.00≤(d1+d3+d5) / (d2+d4)≤4.50. Within the range of the condition, by reasonably allocating the air gap between the lenses, it is beneficial to correct the astigmatism and distortion of the camera optical lens, so that the distortion|Distortion|≤5%, and reduce the possibility of vignetting.

[0062] The central radius of curvature of the object side of the first lens L1 at the paraxial position is defined as R1, and the central radius of curvature of the image side of the first lens L1 at the paraxial position is defined as R2, satisfying the following relationship: -1.30≤(R1+R2) / (R1-R2)≤-1.05. Within the range of the condition, the shape of the first lens L1 is specified. Within the range of the condition, the degree of light deflection after passing through the lens can be mitigated, and chromatic aberration can be effectively corrected so that the chromatic aberration |LC|≤3.0μm.

[0063] Under the conditions described above, the camera optical lenses 10, 20, 30, and 40 have good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thin design. Based on the characteristics of the camera optical lenses 10, 20, 30, and 40, they are particularly suitable for mobile phone camera lens assemblies and web camera lenses composed of high-pixel CCD, CMOS, and other camera elements.

[0064] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0065] The axial distance from the image side of the sixth lens L6 to the image plane Si is defined as BF, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.15≤BF / TTL≤0.24. Within the range of the condition, reducing the back focal length on the basis of miniaturization is not only beneficial to the assembly of the module, but also effectively controls the total length of the optical system.

[0066] The central radius of curvature of the object side of the fifth lens L5 at the paraxial position is defined as R9, and the central radius of curvature of the image side of the fifth lens L5 at the paraxial position is defined as R10, satisfying the following relationship: 0.55≤(R9+R10) / (R9-R10)≤0.90. This defines the shape of the fifth lens L5. Within the range of the condition, it is beneficial to mitigate the degree of light deflection after passing through the lens and can effectively reduce aberrations.

[0067] The object-side surface of the first lens L1 is concave near the axis, and the image-side surface is convex near the axis. The first lens L1 has negative refractive power. The object-side surface and image-side surface of the first lens L1 can also be configured with other concave and convex distributions.

[0068] The focal length of the first lens L1 is f1, satisfying the following relationship: -3.64 ≤ f1 / f ≤ -1.05. This specifies the ratio of the negative refractive power of the first lens L1 to the overall focal length. Within this specified range, the first lens has appropriate negative refractive power, which is beneficial for reducing system aberrations and also promotes the development of ultra-thin and wide-angle lenses. Preferably, it satisfies -2.27 ≤ f1 / f ≤ -1.31.

[0069] The total optical length of the camera lens is TTL, satisfying the following relationship: 0.03≤d1 / TTL≤0.11. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.06≤d1 / TTL≤0.09.

[0070] The object-side surface of the second lens L2 is convex near the axis, and the image-side surface is concave near the axis. The second lens L2 has positive refractive power. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0071] The focal length of the second lens L2 is f2, satisfying the following relationship: 2.02 ≤ f2 / f ≤ 8.04. 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 3.23 ≤ f2 / f ≤ 6.44.

[0072] The object-side radius of curvature of the second lens L2 at the paraxial position is R3, and the image-side radius of curvature of the second lens L2 at the paraxial position is R4, satisfying the following relationship: -19.49≤(R3+R4) / (R3-R4)≤-4.64. This defines the shape of the second lens L2. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting problems such as on-axis chromatic aberration. Preferably, it satisfies -12.18≤(R3+R4) / (R3-R4)≤-5.80.

[0073] The on-axis thickness d3 of the second lens L2 and the total optical length TTL of the imaging optical lens satisfy the following relationship: 0.03≤d3 / TTL≤0.15. Within this range, miniaturization is advantageous. Preferably, 0.05≤d3 / TTL≤0.12 is satisfied.

[0074] 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. The third lens L3 has positive refractive power. The object-side surface and image-side surface of the third lens L3 can also be configured with other concave and convex distributions.

[0075] The focal length of the third lens L3 is f3, satisfying the following relationship: 0.52 ≤ f3 / f ≤ 1.69. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 0.84 ≤ f3 / f ≤ 1.35.

[0076] The central radius of curvature of the object-side surface of the third lens L3 at the paraxial position is R5, and the central radius of curvature of the image-side surface of the third lens L3 at the paraxial position is R6, satisfying the following relationship: 0.06≤(R5+R6) / (R5-R6)≤0.23. Within this range, the shape of the third lens L3 can be effectively controlled, which is beneficial to the forming of the third lens L3 and avoids poor forming and stress generation due to excessive surface curvature of the third lens L3. Preferably, it satisfies 0.10≤(R5+R6) / (R5-R6)≤0.19.

[0077] The on-axis thickness d5 of the third lens L3 and the total optical length TTL of the imaging optical lens satisfy the following relationship: 0.06≤d5 / TTL≤0.24. Within this range, miniaturization is advantageous. Preferably, 0.10≤d5 / TTL≤0.19 is satisfied.

[0078] The object-side surface of the fourth lens L4 is concave near the axis, while the image-side surface is either convex or concave near the axis. The fourth lens L4 has negative refractive power. The object-side surface of the fourth lens L4 can also be configured with other concave or convex distributions.

[0079] The fourth lens L4 has a focal length of f4, satisfying the following relationship: -6.59 ≤ f4 / f ≤ -2.01. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -4.12 ≤ f4 / f ≤ -2.51.

[0080] The central radius of curvature of the object-side surface of the fourth lens L4 at the paraxial position is R7, and the central radius of curvature of the image-side surface of the fourth lens L4 at the paraxial position is R8, satisfying the following relationship: -2.08≤(R7+R8) / (R7-R8)≤-0.64, which defines the shape of the fourth lens L4. Within the range of this condition, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations and other problems at off-axis drawing angles. Preferably, it satisfies -1.30≤(R7+R8) / (R7-R8)≤-0.80.

[0081] The on-axis thickness of the fourth lens L4 is d7, satisfying the following relationship: 0.02≤d7 / TTL≤0.07. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.04≤d7 / TTL≤0.06.

[0082] 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. The fifth lens L5 has positive refractive power. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions.

[0083] The focal length f of the camera optical lens and the focal length f5 of the fifth lens L5 satisfy the following relationship: 0.58 ≤ f5 / f ≤ 2.25. By limiting the fifth lens L5, the light angle of the camera optical lens can be effectively made smoother, reducing tolerance sensitivity. Preferably, it satisfies 0.92 ≤ f5 / f ≤ 1.80.

[0084] The on-axis thickness of the fifth lens L5 is d9, satisfying the following relationship: 0.07≤d9 / TTL≤0.24. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.12≤d9 / TTL≤0.19.

[0085] The focal length f of the camera optical lens and the focal length f6 of the sixth lens L6 satisfy the following relationship: -5.00 ≤ f6 / f ≤ -1.23. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -3.12 ≤ f6 / f ≤ -1.54.

[0086] The central radius of curvature of the object-side surface of the sixth lens L6 at the paraxial position is R11, and the central radius of curvature of the image-side surface of the sixth lens L6 at the paraxial position is R12, satisfying the following relationship: 1.39≤(R11+R12) / (R11-R12)≤4.70. This defines the shape of the sixth lens L6. Within the range of this condition, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 2.23≤(R11+R12) / (R11-R12)≤3.76.

[0087] The axial thickness of the sixth lens L6 is d11, satisfying the following relationship: 0.06≤d11 / TTL≤0.22. Within this range, miniaturization is advantageous. Preferably, it satisfies 0.10≤d11 / TTL≤0.18.

[0088] The aperture value FNO of the camera optical lens is less than or equal to 2.27, thereby achieving a large aperture and good imaging performance.

[0089] The camera optical lens of the present invention will be described below with examples. The symbols described in each example are as follows. The units for focal length, on-axis distance, center radius of curvature, and on-axis thickness are mm.

[0090] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image surface Si), in mm;

[0091] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0092] The technical solution of the present invention will be described in detail below with five implementation methods.

[0093] (First Implementation)

[0094] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0095] Table 1

[0096]

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

[0098] S1: Aperture;

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

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

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

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

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

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

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

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

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

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

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

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

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

[0112] R13: The radius of curvature of the center of the object side of the optical filter GF at the paraxial position;

[0113] R14: The central radius of curvature of the image-side surface of the optical filter GF at the paraxial position;

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

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

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

[0117] d2: The on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

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

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

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

[0121] d6: The on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

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

[0123] d8: The on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

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

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

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

[0127] d12: The on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the optical filter GF;

[0128] d13: On-axis thickness of the optical filter GF;

[0129] d14: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0130] nd: Refractive index of the d-line (the d-line is green light with a wavelength of 550 nm);

[0131] nd1: The refractive index of the d-line of the first lens L1;

[0132] nd2: The refractive index of the d-line of the second lens L2;

[0133] nd3: The refractive index of the d-line of the third lens L3;

[0134] nd4: The refractive index of the d-line of the fourth lens L4;

[0135] nd5: The refractive index of the d-line of the fifth lens L5;

[0136] nd6: The refractive index of the d-line of the sixth lens L6;

[0137] ndg: The refractive index of the d-line of the optical filter GF;

[0138] vd: Abbe number;

[0139] v1: Abbe number of the first lens L1;

[0140] v2: Abbe number of the second lens L2;

[0141] v3: Abbe number of the third lens L3;

[0142] v4: Abbe number of the fourth lens L4;

[0143] v5: Abbe number of the fifth lens L5;

[0144] v6: Abbe number of the sixth lens L6;

[0145] vg: Abbe number of the optical filter GF.

[0146] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0147] Table 2

[0148]

[0149] 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).

[0150] 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 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0151] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 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).

[0152] Figure 2 , Figure 3 A schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 10 of the first embodiment are shown respectively. Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. Figure 4The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0153] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 0.968 mm, the image height (IH) in the full field of view (1.0 field of view) is 3.269 mm, and the field of view (FOV) in the diagonal direction of the full field of view (1.0 field of view) is 115.21°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin design, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0154] It is understandable that the 1.0 field of view image height refers to half the diagonal length of the effective pixel area of ​​the sensor; the FOV in the diagonal direction of the 1.0 field of view refers to the field of view angle corresponding to the effective pixel area of ​​the sensor.

[0155] (Second Implementation)

[0156] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0157] Figure 5 The image shown is the camera optical lens 20 according to the second embodiment of the present invention.

[0158] Tables 3 and 4 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0159] Table 3

[0160]

[0161] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0162] Table 4

[0163]

[0164]

[0165] Figure 6 , Figure 7 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 20 of the second embodiment. Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0166] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 0.956 mm, the image height IH of the full field of view (1.0 field of view) is 3.210 mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 115.88°. The camera optical lens 20 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0167] (Third Implementation)

[0168] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0169] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0170] Tables 5 and 6 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0171] Table 5

[0172]

[0173] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0174] Table 6

[0175]

[0176]

[0177] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 30 of the third embodiment. Figure 12 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 30 of the third embodiment. Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0178] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 1.017mm, the image height IH of the full field of view (1.0 field of view) is 3.222mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 112.66°. The camera optical lens 30 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0179] (Fourth Implementation)

[0180] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0181] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0182] Tables 7 and 8 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0183] Table 7

[0184]

[0185] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0186] Table 8

[0187]

[0188]

[0189] Figure 14 , Figure 15 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm 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.

[0190] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 0.948 mm, the image height IH of the full field of view (1.0 field of view) is 3.249 mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 116.30°. The camera optical lens 40 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0191] (Comparative Implementation Methods)

[0192] The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0193] Figure 17 The image shown is a camera optical lens 50 according to a comparative embodiment of the present invention.

[0194] Tables 9 and 10 show the design data of the camera optical lens 50 of the comparative embodiment of the present invention.

[0195] Table 9

[0196]

[0197] Table 10 shows the aspherical data of each lens in the camera optical lens 50 of the comparative embodiment of the present invention.

[0198] Table 10

[0199]

[0200]

[0201] Figure 18 , Figure 19 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm after passing through the camera optical lens 50 of the comparative embodiment. Figure 20 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 50 of the comparative embodiment. Figure 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0202] Table 11 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the above conditional expression 2.00≤(d1+d3+d5) / (d2+d4)≤4.50.

[0203] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 0.889 mm, the image height IH of the full field of view (1.0 field of view) is 3.165 mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 119.57°. The camera optical lens 50 does not meet the design requirements of large aperture, wide angle and ultra-thinness, and its on-axis and off-axis chromatic aberrations are not fully corrected, and it does not have excellent optical characteristics.

[0204] Table 11

[0205]

[0206] 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 are arranged in the following order from the object side to the image side: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative 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 concave near the axis, and the image-side surface of the first lens is convex near the axis; the object-side surface of the second lens is convex near the axis, and the image-side surface of the second lens is concave near the axis; the object-side surface of the third lens is convex near the axis, and the image-side surface of the third lens is convex near the axis; the object-side surface of the fourth lens is concave near the axis, and the image-side surface of the fourth lens is concave near the axis; the object-side surface of the fifth lens is convex near the axis, and the image-side surface of the fifth lens is convex near the axis; 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; Wherein, the focal length of the camera optical lens is f, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the axial thickness of the first lens is d1, the axial thickness of the second lens is d3, the axial thickness of the third lens is d5, the axial distance from the image side of the first lens to the object side of the second lens is d2, the axial distance from the image side of the second lens to the object side of the third lens is d4, the central radius of curvature of the object side of the first lens at the paraxial position is R1, the central radius of curvature of the image side of the first lens at the paraxial position is R2, the central radius of curvature of the object side of the fifth lens at the paraxial position is R9, and the central radius of curvature of the image side of the fifth lens at the paraxial position is R10, and the following relationship is satisfied: 3.00≤(f5-f6) / f≤4.00; 2.00≤(d1+d3+d5) / (d2+d4)≤4.50; -1.30≤(R1+R2) / (R1-R2)≤-1.05; 0.55≤(R9+R10) / (R9-R10)≤0.

90.

2. The camera optical lens according to claim 1, characterized in that, The axial distance from the image-side surface of the sixth lens to the image plane is BF, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.15≤BF / TTL≤0.

24.

3. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, and the total optical length of the imaging optical lens is TTL, and they satisfy the following relationship: -3.64≤f1 / f≤-1.05; 0.03≤d1 / TTL≤0.

11.

4. 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 surface of the second lens at the paraxial position is R3, the central radius of curvature of the image-side surface of the second lens at the paraxial position is R4, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 2.02≤f² / f≤8.04; -19.49≤(R3+R4) / (R3-R4)≤-4.64; 0.03≤d3 / TTL≤0.

15.

5. The camera optical lens according to claim 1, characterized in that, The focal length of the third lens is f3, the central radius of curvature of the object-side surface of the third lens at the paraxial position is R5, the central radius of curvature of the image-side surface of the third lens at the paraxial position is R6, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 0.52≤f3 / f≤1.69; 0.06≤(R5+R6) / (R5-R6)≤0.23; 0.06≤d5 / TTL≤0.

24.

6. The camera optical lens according to claim 1, characterized in that, The fourth lens has a focal length of f4, a central radius of curvature of its object-side surface at the paraxial position of R7, a central radius of curvature of its image-side surface at the paraxial position of R8, an on-axis thickness of d7, and a total optical length of TTL, satisfying the following relationship: -6.59≤f4 / f≤-2.01; -2.08≤(R7+R8) / (R7-R8)≤-0.64; 0.02≤d7 / TTL≤0.

07.

7. The camera optical lens according to claim 1, characterized in that, The fifth lens has an on-axis thickness of d9, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 0.58 ≤ f5 / f ≤ 2.25; 0.07≤d9 / TTL≤0.

24.

8. The camera optical lens according to claim 1, characterized in that, The object-side radius of curvature of the sixth lens at the paraxial position is R11, the image-side radius of curvature of the sixth lens at the paraxial position is R12, the axial thickness of the sixth lens is d11, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: -5.00≤f6 / f≤-1.23; 1.39≤(R11+R12) / (R11-R12)≤4.70; 0.06≤d11 / TTL≤0.

22.

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

Images