Imaging optical lens

Abstract

An imaging optical lens (10, 20, 30, 40), comprising five lenses in total, the five lenses being sequentially arranged from an object side to an image side: a first lens (L1) having a positive refractive power, a second lens (L2) having a negative refractive power, a third lens (L3) having a positive refractive power, a fourth lens (L4) having refractive power, and a fifth lens (L5) having a negative refractive power. In addition, the imaging optical lens satisfies the following equations: 0.50 ≤ (R5 + R6) / (R5 - R6) ≤ 0.81; -4.00 ≤ (f2 + f5) / f ≤ -2.50; 0.60 ≤ d9 / d8 ≤ 2.00; 2.80 ≤ R9 / R10 ≤ 6.00; -8.00 ≤ (R7 + R8) / f ≤ -4.00. The imaging optical lens (10, 20, 30, 40) satisfies design requirements for large aperture, ultra-thinness, and wide-angle adaptation.

Description

Camera optical lens Technical Field

[0001] This invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for handheld terminal devices such as smartphones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Technology

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera 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, five-element lens structures are gradually appearing in lens designs. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, small size, and adequate aberration correction.

[0003] Summary of the Invention

[0004] To address the aforementioned problems, the main objective of this invention is to provide a camera optical lens that, while possessing excellent optical performance, meets the design requirements of large aperture, ultra-thin design, and wide-angle capability.

[0005] To achieve the above objectives, the present invention provides a camera optical lens comprising five lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with refractive power, and a fifth lens with negative refractive power.

[0006] Wherein, the focal length of the camera optical lens is f, the focal length of the second lens is f2, the focal length of the fifth lens is f5, the axial distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens is d8, the axial thickness of the fifth lens is d9, 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, the central radius of curvature of the image-side surface of the fourth lens is R8, the central radius of curvature of the object-side surface of the fifth lens is R9, and the central radius of curvature of the image-side surface of the fifth lens is R10, and satisfying the following relationships: 0.50≤(R5+R6) / (R5-R6)≤0.81; -4.00≤(f2+f5) / f≤-2.50; 0.60≤d9 / d8≤2.00; 2.80≤R9 / R10≤6.00; -8.00≤(R7+R8) / f≤-4.00.

[0007] Preferably, the on-axis thickness of the second lens is d3, the on-axis thickness of the third lens is d5, and the on-axis thickness of the fourth lens is d7, and satisfies the following relationship: 5.00≤(d5+d7) / d3≤8.00.

[0008] Preferably, the total optical length of the camera lens is TTL and satisfies the following relationship: 1.05≤TTL / f≤1.35.

[0009] Preferably, the object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position; the focal length of the first lens is f1, the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the camera lens is TTL, and satisfies the following relationships: 0.36≤f1 / f≤1.46; -3.20≤(R1+R2) / (R1-R2)≤-0.69; 0.07≤d1 / TTL≤0.25.

[0010] Preferably, 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 central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -6.07≤f2 / f≤-1.14; 1.37≤(R3+R4) / (R3-R4)≤5.07; 0.02≤d3 / TTL≤0.08.

[0011] Preferably, 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 focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the total optical length of the camera lens is TTL, and satisfies the following relationships: 2.31≤f3 / f≤19.90; 0.06≤d5 / TTL≤0.25.

[0012] Preferably, the object-side surface of the fourth lens is concave near the axis, and the image-side surface of the fourth lens is convex near the axis; the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -39.50≤f4 / f≤1.97; -10.80≤(R7+R8) / (R7-R8)≤2.11; 0.06≤d7 / TTL≤0.25.

[0013] Preferably, the object-side surface of the fifth lens is convex at the paraxial position, and the image-side surface of the fifth lens is concave at the paraxial position; the total optical length of the camera lens is TTL, and satisfies the following relationships: -1.84≤f5 / f≤-0.53; 0.05≤d9 / TTL≤0.20.

[0014] Preferably, the total optical length of the camera lens is TTL, the maximum image height of the camera lens is IH, and the following relationship is satisfied: TTL / IH≤1.79.

[0015] Preferably, the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.43≤f12 / f≤2.17.

[0016] 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 large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0017] 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:

[0018] Figure 1 is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 1;

[0020] Figure 3 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 1;

[0021] Figure 4 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 1;

[0022] Figure 5 is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 5;

[0024] Figure 7 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 5;

[0025] Figure 8 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 5;

[0026] Figure 9 is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0027] Figure 10 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 9;

[0028] Figure 11 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 9;

[0029] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 9;

[0030] Figure 13 is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0031] Figure 14 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 13;

[0032] Figure 15 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 13;

[0033] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 13;

[0034] Figure 17 is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0035] Figure 18 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 17;

[0036] Figure 19 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 17;

[0037] Figure 20 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 17. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of the invention. However, the technical solutions claimed in this invention can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0039] Referring to Figures 1-16, the technical solution of the present invention provides a camera optical lens 10, 20, 30, and 40. Figures 1, 5, 9, and 13 show the camera optical lenses 10, 20, 30, and 40 of the present invention, which together comprise five lenses. Specifically, the camera optical lens, from the object side to the image side, consists of: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5. An optical filter GF or other optical element may be disposed between the fifth lens L5 and the image plane S1.

[0040] The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of plastic. Other materials may also be used for the lenses.

[0041] The first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has refractive power, and the fifth lens L5 has negative refractive power. In other embodiments, each lens may also have other refractive powers.

[0042] The center radius of curvature of the object side of the third lens L3 is defined as R5, and the center radius of curvature of the image side of the third lens L3 is defined as R6, satisfying the following relationship: 0.50≤(R5+R6) / (R5-R6)≤0.81. This relationship specifies the shape of the third lens L3. Within the range of the relationship, it is beneficial to correct the astigmatism and distortion of the camera lens, so that the distortion|Distortion|≤2.5%, and reduce the possibility of vignetting.

[0043] The focal length of the camera optical lens is defined as f, the focal length of the second lens L2 is f2, and the focal length of the fifth lens L5 is f5, satisfying the following relationship: -4.00≤(f2+f5) / f≤-2.50. By reasonably allocating the focal length of the camera optical lens, the camera optical lens can have better imaging quality and lower sensitivity.

[0044] The axial distance from the image side of the fourth lens L4 to the object side of the fifth lens L5 is defined as d8, and the axial thickness of the fifth lens L5 is defined as d9, satisfying the following relationship: 0.60 ≤ d9 / d8 ≤ 2.00. This relationship specifies the ratio of the axial thickness of the fifth lens L5 to the air gap between the fourth lens L4 and the fifth lens L5. Within the range of this relationship, by reasonably allocating the air gap between the lenses, it is beneficial to reduce the assembly difficulty in the actual production process and improve the yield rate.

[0045] The central radius of curvature of the object side of the fifth lens L5 is defined as R9, and the central radius of curvature of the image side of the fifth lens L5 is defined as R10, satisfying the following relationship: 2.80≤R9 / R10≤6.00. This relationship specifies the shape of the fifth lens L5. Within the range of the relationship, 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|≤2.0μm.

[0046] The center radius of curvature of the object side of the fourth lens L4 is defined as R7, and the center radius of curvature of the image side of the fourth lens L4 is defined as R8, satisfying the following relationship: -8.00≤(R7+R8) / f≤-4.00. Within this range, the optical power of the fourth lens L4 can be easily adjusted, thereby facilitating the fourth lens L4 to correct the on-axis chromatic aberration and off-axis magnification chromatic aberration of light after passing through the third lens L3, and improving the imaging quality.

[0047] Under the condition of satisfying the above relationships, the camera optical lenses 10, 20, 30, and 40 have good optical performance and can meet the design requirements of large aperture, wide angle and ultra-thinness. 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.

[0048] Based on the above relationships and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0049] The object-side surface of the first lens L1 is convex paraxially, and the image-side surface of the first lens L1 is concave paraxially; the object-side surface of the second lens L2 is convex paraxially, and the image-side surface of the second lens L2 is concave paraxially; the object-side surface of the third lens L3 is convex paraxially, and the image-side surface of the third lens L3 is convex paraxially; the object-side surface of the fourth lens L4 is concave paraxially, and the image-side surface of the fourth lens L4 is convex paraxially; the object-side surface of the fifth lens L5 is convex paraxially, and the image-side surface of the fifth lens L5 is concave paraxially. In other embodiments, each lens may also have other surface shapes.

[0050] The on-axis thickness of the second lens L2 is defined as d3, the on-axis thickness of the third lens L3 is defined as d5, and the on-axis thickness of the fourth lens L4 is defined as d7, satisfying the following relationship: 5.00≤(d5+d7) / d3≤8.00. By allocating the on-axis thicknesses of the second lens L2, the third lens L3, and the fourth lens L4, the total optical length of the camera lens can be compressed within the range of the relationship.

[0051] The total optical length of the camera lens is defined as TTL, and satisfies the following relationship: 1.05≤TTL / f≤1.35. This relationship specifies the telephoto ratio. By being less than the upper limit of the relationship, the total optical length can be controlled to be shorter, making it easier to achieve miniaturization. On the other hand, by being greater than the lower limit of the relationship, it is easy to correct distortion and on-axis chromatic aberration, so that the camera optical system can maintain good optical performance.

[0052] The focal length of the first lens L1 is f1, satisfying the following relationship: 0.36 ≤ f1 / f ≤ 1.46. This relationship defines the ratio of the focal length of the first lens L1 to that of the camera optical lens. Within this range, by reasonably allocating the focal length of the camera optical lens, the camera optical lens can achieve better imaging quality and lower sensitivity. Preferably, it satisfies 0.57 ≤ f1 / f ≤ 1.17.

[0053] The central radius of curvature of the object-side surface of the first lens L1 is defined as R1, and the central radius of curvature of the image-side surface of the first lens L1 is defined as R2, satisfying the following relationship: -3.20 ≤ (R1 + R2) / (R1 - R2) ≤ -0.69. By reasonably controlling the shape of the first lens L1, the first lens L1 can effectively correct the spherical aberration of the system. Preferably, it satisfies -2.00 ≤ (R1 + R2) / (R1 - R2) ≤ -0.86.

[0054] The on-axis thickness of the first lens L1 is d1, satisfying the following relationship: 0.07 ≤ d1 / TTL ≤ 0.25. This relationship defines the ratio of the on-axis thickness of the first lens L1 to the total optical length. Within this range, it helps control the thickness of the first lens L1, facilitates injection molding, and aids in light collection, thereby ensuring a wide-angle design. Preferably, it satisfies 0.11 ≤ d1 / TTL ≤ 0.20.

[0055] The camera optical lens also satisfies the following relationship: -6.07 ≤ f2 / f ≤ -1.14. This relationship defines the ratio of the focal length f2 of the second lens L2 to the focal length f of the camera optical lens. Within this range, the field curvature of the camera optical lens can be effectively balanced. Preferably, -3.80 ≤ f2 / f ≤ -1.42.

[0056] 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 following relationship: 1.37≤(R3+R4) / (R3-R4)≤5.07. This relationship defines the shape of the second lens L2. Within this range, as lenses develop towards ultra-thin and wide-angle designs, it is beneficial for correcting on-axis chromatic aberration. Preferably, it satisfies 2.19≤(R3+R4) / (R3-R4)≤4.06.

[0057] The camera optical lens satisfies the following relationship: 0.02≤d3 / TTL≤0.08. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.03≤d3 / TTL≤0.06.

[0058] The focal length of the third lens L3 is defined as f3, satisfying the following relationship: 2.31 ≤ f3 / f ≤ 19.90. This relationship specifies the ratio of the focal length of the third lens L3 to the focal length f of the imaging optical lens. Within this range, by reasonably allocating the focal length of the imaging optical lens, the lens achieves better imaging quality and lower sensitivity. Preferably, it satisfies 3.69 ≤ f3 / f ≤ 15.92.

[0059] The camera optical lens also satisfies the following relationship: 0.06≤d5 / TTL≤0.25. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.10≤d5 / TTL≤0.20.

[0060] The fourth lens L4 has a focal length of f4, satisfying the following relationship: -39.50 ≤ f4 / f ≤ 1.97. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -24.69 ≤ f4 / f ≤ 1.58.

[0061] The camera optical lens also satisfies the following relationship: -10.80≤(R7+R8) / (R7-R8)≤2.11, which specifies the shape of the fourth lens L4. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems at off-axis angles. Preferably, it satisfies -6.75≤(R7+R8) / (R7-R8)≤1.69.

[0062] The camera optical lens also satisfies the following relationship: 0.06≤d7 / TTL≤0.25, which is beneficial for achieving ultra-thinness within the range of the relationship. Preferably, it satisfies 0.10≤d7 / TTL≤0.20.

[0063] The focal length of the fifth lens L5 is f5, satisfying the following relationship: -1.84 ≤ f5 / f ≤ -0.53. This limitation on the fifth lens L5 effectively smooths the light angle of the camera lens, reducing tolerance sensitivity. Preferably, it satisfies -1.15 ≤ f5 / f ≤ -0.66.

[0064] The fifth lens L5 also satisfies the following relationship: 0.05≤d9 / TTL≤0.20. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.07≤d9 / TTL≤0.16.

[0065] The maximum image height of the camera optical lens is IH, which satisfies the following relationship: TTL / IH≤1.79. Within the range of the relationship, it is beneficial to achieve ultra-thinness.

[0066] The combined focal length of the first lens L1 and the second lens L2 is f12, satisfying the following relationship: 0.43 ≤ f12 / f ≤ 2.17. Within this range, aberrations and distortions of the camera lens can be eliminated, and the back focal length of the camera lens can be suppressed, maintaining the miniaturization of the image lens system. Preferably, it satisfies 0.70 ≤ f12 / f ≤ 1.74.

[0067] The field of view (FOV) of the camera optical lens is greater than or equal to 79.00°, thereby achieving wide-angle viewing.

[0068] The camera optical lens has an aperture value FNO less than or equal to 1.94, thereby achieving a large aperture and good imaging performance. Preferably, FNO is less than or equal to 1.90.

[0069] 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.

[0070] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0071] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0072] The technical solution of the present invention will be described in detail below with four 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.

[0073] (First Implementation)

[0074] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention. In this embodiment, the fourth lens L4 has positive refractive power.

[0075] Table 1

[0076] The meanings of each symbol are as follows.

[0077] S1: Aperture;

[0078] R: Radius of curvature at the center of the optical surface;

[0079] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0080] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0081] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0082] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0083] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0084] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0085] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0086] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0087] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0088] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0089] R11: The center radius of curvature of the object side surface of the optical filter GF;

[0090] R12: Radius of curvature of the center of the image side of the optical filter GF;

[0091] d: Axial thickness of the lens, axial distance between lenses;

[0092] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0093] d1: On-axis thickness of the first lens L1;

[0094] 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;

[0095] d3: On-axis thickness of the second lens L2;

[0096] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0097] d5: On-axis thickness of the third lens L3;

[0098] 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;

[0099] d7: On-axis thickness of the fourth lens L4;

[0100] 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;

[0101] d9: On-axis thickness of the fifth lens L5;

[0102] d10: The on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the optical filter GF;

[0103] d11: On-axis thickness of the optical filter GF;

[0104] d12: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0105] nd: Refractive index of the d-line (the d-line is green light with a wavelength of 555 nm);

[0106] nd1: The refractive index of the d-line of the first lens L1;

[0107] nd2: The refractive index of the d-line of the second lens L2;

[0108] nd3: The refractive index of the d-line of the third lens L3;

[0109] nd4: The refractive index of the d-line of the fourth lens L4;

[0110] nd5: The refractive index of the d-line of the fifth lens L5;

[0111] ndg: The refractive index of the d-line of the optical filter GF;

[0112] vd: Abbe number;

[0113] v1: Abbe number of the first lens L1;

[0114] v2: Abbe number of the second lens L2;

[0115] v3: Abbe number of the third lens L3;

[0116] v4: Abbe number of the fourth lens L4;

[0117] v5: Abbe number of the fifth lens L5;

[0118] vg: Abbe number of the optical filter GF.

[0119] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0120] Table 2

[0121] For convenience, the aspherical surfaces of each lens surface are those shown in formula (1) below. However, the present invention is not limited to the aspherical polynomial form represented by formula (1). 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 +A32r 32 (1)

[0122] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, and A32 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspherical curve and the optical axis, and z is the aspherical depth (the perpendicular distance between a point on the aspherical surface at a distance r from the optical axis and a tangent plane at the vertex of the aspherical optical axis).

[0123] Figures 2 and 3 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm passes through the imaging optical lens 10 of the first embodiment, respectively. Figure 4 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555nm passes through the imaging optical lens 10 of the first embodiment. In Figure 4, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0124] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 2.587 mm, the full field of view (IH) is 4.096 mm, and the field of view (FOV) in the diagonal direction is 78.67°. The camera optical lens 10 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.

[0125] (Second Implementation)

[0126] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0127] Figure 5 shows the camera optical lens 20 of the second embodiment of the present invention.

[0128] Tables 3 and 4 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0129] Table 3

[0130] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0131] Table 4

[0132] Figures 6 and 7 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm passes through the imaging optical lens 20 of the second embodiment, respectively. Figure 8 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555nm passes through the imaging optical lens 20 of the second embodiment. In Figure 8, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0133] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 20 is 2.539 mm, the full field of view (IH) is 4.096 mm, and the field of view (FOV) in the diagonal direction is 79.51°. 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.

[0134] (Third Implementation)

[0135] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0136] Figure 9 shows the camera optical lens 30 according to the third embodiment of the present invention. The fourth lens L4 has negative refractive power.

[0137] Tables 5 and 6 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0138] Table 5

[0139] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0140] Table 6

[0141] Figures 10 and 11 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 435 nm passes through the imaging optical lens 30 of the third embodiment, respectively. Figure 12 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 30 of the third embodiment. In Figure 12, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0142] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 30 is 3.827 mm, the full field of view (IH) is 4.096 mm, and the field of view (FOV) in the diagonal direction is 58.04°. 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.

[0143] (Fourth Implementation)

[0144] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0145] Figure 13 shows the camera optical lens 40 of the fourth embodiment of the present invention.

[0146] Tables 7 and 8 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0147] Table 7

[0148] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0149] Table 8

[0150] Figures 14 and 15 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm passes through the camera optical lens 40 of the fourth embodiment, respectively. Figure 16 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 40 of the third embodiment. In Figure 16, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0151] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 40 is 2.417 mm, the full field of view (IH) is 4.096 mm, and the field of view (FOV) in the diagonal direction is 82.33°. 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.

[0152] Table 11, which appears later, shows the values ​​corresponding to the parameters specified in the numerical values ​​and relationships in each of the first, second, third, and fourth implementation methods.

[0153] (Comparative Implementation Methods)

[0154] The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0155] Figure 17 shows the camera optical lens 50 of the comparative embodiment of the present invention.

[0156] Tables 9 and 10 show the design data of the camera optical lens 50 of the comparative embodiment of the present invention.

[0157] Table 9

[0158] Table 10 shows the aspherical data of each lens in the camera optical lens 50 of the comparative embodiment of the present invention.

[0159] Table 10

[0160] Figures 18 and 19 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 435 nm passes through the imaging optical lens 50 of the comparative embodiment, respectively. Figure 20 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 50 of the comparative embodiment. In Figure 20, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0161] Table 11 below lists the values ​​of each relation in the comparative embodiment according to the above-described relation. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the above-described relation 0.50≤(R5+R6) / (R5-R6)≤0.81, resulting in poor imaging effect.

[0162] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 2.583mm, the full field of view image height IH is 4.091mm, and the diagonal field of view FOV is 76.95°. The camera optical lens 50 does not meet the design requirements of large aperture, wide angle, and ultra-thin design.

[0163] Table 11

[0164] 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 five lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with refractive power, and a fifth lens with negative refractive power. Wherein, the focal length of the camera optical lens is f, the focal length of the second lens is f2, the focal length of the fifth lens is f5, the axial distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens is d8, the axial thickness of the fifth lens is d9, 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, the central radius of curvature of the image-side surface of the fourth lens is R8, the central radius of curvature of the object-side surface of the fifth lens is R9, and the central radius of curvature of the image-side surface of the fifth lens is R10, and the following relationship is satisfied: 0.50≤(R5+R6) / (R5-R6)≤0.81; -4.00≤(f2+f5) / f≤-2.50; 0.60≤d9 / d8≤2.00; 2.80≤R9 / R10≤6.00; -8.00≤(R7+R8) / f≤-4.

00.

2. The camera optical lens according to claim 1, characterized in that, The second lens has an on-axis thickness of d3, the third lens has an on-axis thickness of d5, and the fourth lens has an on-axis thickness of d7, and they satisfy the following relationship: 5.00≤(d5+d7) / d3≤8.

00.

3. The camera optical lens according to claim 1, characterized in that, The total optical length of the camera lens is TTL, and satisfies the following relationship: 1.05≤TTL / f≤1.

35.

4. The camera optical lens according to claim 1, characterized in that, The object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position. The focal length of the first lens is f1, the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 0.36≤f1 / f≤1.46; -3.20≤(R1+R2) / (R1-R2)≤-0.69; 0.07≤d1 / TTL≤0.

25.

5. The camera optical lens according to claim 1, characterized in that, 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 center radius of curvature of the object-side surface of the second lens is R3, the center radius of curvature of the image-side surface of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: -6.07≤f² / f≤-1.14; 1.37≤(R3+R4) / (R3-R4)≤5.07; 0.02≤d3 / TTL≤0.

08.

6. The camera optical lens according to claim 1, characterized in that, 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 third lens has a focal length of f3, an on-axis thickness of d5, and a total optical length of TTL, satisfying the following relationship: 2.31≤f3 / f≤19.90; 0.06≤d5 / TTL≤0.

25.

7. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fourth lens is concave near the axis, and the image-side surface of the fourth lens is convex near the axis. The fourth lens has a focal length of f4, an on-axis thickness of d7, and a total optical length of TTL, satisfying the following relationship: -39.50≤f4 / f≤1.97; -10.80≤(R7+R8) / (R7-R8)≤2.11; 0.06≤d7 / TTL≤0.

25.

8. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fifth lens is convex at the paraxial position, and the image-side surface of the fifth lens is concave at the paraxial position. The total optical length of the camera lens is TTL, and satisfies the following relationship: -1.84≤f5 / f≤-0.53; 0.05≤d9 / TTL≤0.

20.

9. The camera optical lens according to claim 1, characterized in that, The total optical length of the camera lens is TTL, the maximum image height of the camera lens is IH, and the following relationship is satisfied: TTL / IH≤1.

79.

10. The camera optical lens according to claim 1, characterized in that, The combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.43≤f12 / f≤2.17.

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