Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which comprises five lenses which are sequentially a first lens with positive refraction power, a second lens with negative refraction power, a third lens with positive refraction power, a fourth lens with refraction power and a fifth lens with negative refraction power from the object side to the image side. The following relational expression is satisfied: (R5 + R6) / (R5-R6) is more than or equal to 0.50 and less than or equal to 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 camera shooting optical lens provided by the invention can meet the design requirements of large aperture, ultra-thinness and wide angle.

Description

Technical Field

[0001] The present invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for portable terminal devices such as smart phones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Art

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera optical lenses has been increasing. Due to the reduction in the pixel size of photosensitive devices and the trend of today's electronic products to have good functions and a thin and portable appearance, miniaturized camera optical lenses with good imaging quality have become the mainstream in the current market. In order to obtain better imaging quality, a multi-piece lens structure is often used. In addition, with the development of technology and the increase in user's diversified needs, as the pixel area of ​​photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, a five-piece lens structure has gradually appeared in lens design. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, small size, and fully corrected aberrations. Summary of the invention

[0003] In view of the above problems, the main purpose of the present invention is to provide a camera optical lens, which has good optical performance and meets the design requirements of large aperture, ultra-thinness and wide angle.

[0004] To achieve the above object, the technical solution of the present invention provides a camera optical lens, which comprises five lenses in total, and the five lenses are, from the object side to the image side, in order: 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;

[0005] Among them, 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 on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, the on-axis thickness of the fifth lens is d9, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, 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, the central curvature radius of the object side surface of the fifth lens is R9, the central curvature radius of the image side surface of the fifth lens is R10, and the following relationship is satisfied:

[0006] 0.50≤(R5+R6) / (R5-R6)≤0.81;

[0007] -4.00≤(f2+f5) / f≤-2.50;

[0008] 0.60≤d9 / d8≤2.00;

[0009] 2.80≤R9 / R10≤6.00;

[0010] -8.00≤(R7+R8) / f≤-4.00.

[0011] 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 the following relationship is satisfied:

[0012] 5.00≤(d5+d7) / d3≤8.00.

[0013] Preferably, the total optical length of the camera optical lens is TTL and satisfies the following relationship:

[0014] 1.05≤TTL / f≤1.35.

[0015] 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 curvature radius of the object side surface of the first lens is R1, the central curvature radius of the image side surface of the first lens is R2, the axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0016] 0.36≤f1 / f≤1.46;

[0017] -3.20≤(R1+R2) / (R1-R2)≤-0.69;

[0018] 0.07≤d1 / TTL≤0.25.

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

[0020] -6.07≤f2 / f≤-1.14;

[0021] 1.37≤(R3+R4) / (R3-R4)≤5.07;

[0022] 0.02≤d3 / TTL≤0.08.

[0023] 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 axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0024] 2.31≤f3 / f≤19.90;

[0025] 0.06≤d5 / TTL≤0.25.

[0026] Preferably, the object side surface of the fourth lens is concave at the paraxial position, and the image side surface of the fourth lens is convex at the paraxial position; the focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0027] -39.50≤f4 / f≤1.97;

[0028] -10.80≤(R7+R8) / (R7-R8)≤2.11;

[0029] 0.06≤d7 / TTL≤0.25.

[0030] 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 optical lens is TTL, and satisfies the following relationship:

[0031] -1.84≤f5 / f≤-0.53;

[0032] 0.05≤d9 / TTL≤0.20.

[0033] Preferably, the total optical length of the camera optical lens is TTL, the maximum image height of the camera optical lens is IH, and the following relationship is satisfied:

[0034] TTL / IH≤1.79.

[0035] Preferably, the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship:

[0036] 0.43≤f12 / f≤2.17.

[0037] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical properties, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 work, among which:

[0039] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0040] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0041] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0042] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0043] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0044] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0045] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0046] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0047] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0048] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0049] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0050] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0051] Fig.13is a schematic structural diagram of a camera optical lens according to a fourth embodiment of the present invention;

[0052] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0053] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0054] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0055] Fig.17 is a schematic structural diagram of a camera optical lens according to a comparative implementation mode;

[0056] Fig.18 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0057] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0058] Fig. 20 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0060] Reference Figure 1-16 The technical solution of the present invention provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5 , 9, and 13 show the camera optical lenses 10, 20, 30, and 40 of the present invention, respectively. The camera optical lenses 10, 20, 30, and 40 include five lenses in total. Specifically, the camera optical lenses include, from the object side to the image side, an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. An optical element such as an optical filter GF may be provided between the fifth lens L5 and the image plane Si.

[0061] The first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of plastic material, and the fifth lens L5 is made of plastic material. Each lens may also be made of other materials.

[0062] 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.

[0063] The central curvature radius of the object side surface of the third lens L3 is defined as R5, and the central curvature radius of the image side surface of the third lens L3 is defined as R6, which satisfy the following relationship: 0.50≤(R5+R6) / (R5-R6)≤0.81. The 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 optical lens, so that the distortion |Distortion|≤2.5%, thereby reducing the possibility of vignetting.

[0064] The focal length of the camera optical lens is defined as f, the focal length of the second lens L2 is defined as f2, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: -4.00≤(f2+f5) / f≤-2.50. By reasonably allocating the optical focal length of the camera optical lens, the camera optical lens has better imaging quality and lower sensitivity.

[0065] An axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5 is defined as d8, and an axial thickness of the fifth lens L5 is defined as d9, which satisfy the following relationship: 0.60≤d9 / d8≤2.00. The relationship specifies a 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 the relationship, by reasonably allocating the air gap between the lenses, it is helpful to reduce the difficulty of assembly in an actual production process and improve the yield rate.

[0066] The central curvature radius of the object side surface of the fifth lens L5 is defined as R9, and the central curvature radius of the image side surface of the fifth lens L5 is defined as R10, which satisfy the following relationship: 2.80≤R9 / R10≤6.00. The relationship specifies the shape of the fifth lens L5. Within the range of the relationship, the degree of deviation of light passing through the lens can be alleviated, and chromatic aberration can be effectively corrected, so that the chromatic aberration |LC|≤2.0μm.

[0067] The central curvature radius of the object side surface of the fourth lens L4 is defined as R7, and the central curvature radius of the image side surface of the fourth lens L4 is defined as R8, which satisfy the following relationship: -8.00≤(R7+R8) / f≤-4.00. Within the range of this relationship, the optical power of the fourth lens L4 can be easily adjusted, so that the fourth lens L4 can correct the axial chromatic aberration and off-axial chromatic aberration of magnification of the light after passing through the third lens L3, thereby improving the imaging quality.

[0068] When the above relationship expressions are satisfied, the camera optical lenses 10, 20, 30, 40 have good optical performance and can meet the design requirements of large aperture, wide angle and ultra-thinness. According to the characteristics of the camera optical lenses 10, 20, 30, 40, the camera optical lenses 10, 20, 30, 40 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0069] Based on the above relationship and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0070] The object side surface of the first lens L1 is convex at the paraxial position, and the image side surface of the first lens L1 is concave at the paraxial position; the object side surface of the second lens L2 is convex at the paraxial position, and the image side surface of the second lens L2 is concave at the paraxial position; the object side surface of the third lens L3 is convex at the paraxial position, and the image side surface of the third lens L3 is convex at the paraxial position; the object side surface of the fourth lens L4 is concave at the paraxial position, and the image side surface of the fourth lens L4 is convex at the paraxial position; the object side surface of the fifth lens L5 is convex at the paraxial position, and the image side surface of the fifth lens L5 is concave at the paraxial position. In other embodiments, each lens may also have other surface shapes.

[0071] 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, and the following relationship is satisfied: 5.00≤(d5+d7) / d3≤8.00. By distributing 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 optical lens is compressed within the range of the relationship.

[0072] The total optical length of the camera optical lens is defined as TTL and satisfies the following relationship: 1.05≤TTL / f≤1.35. The relationship specifies the telephoto ratio. By being less than the upper limit value of the relationship, the total optical length can be controlled to be shorter, making it easy to achieve miniaturization. On the other hand, by being greater than the lower limit value of the relationship, it is easy to correct distortion and axial chromatic aberration so that the camera optical system can maintain good optical performance.

[0073] The focal length of the first lens L1 is f1, which satisfies the following relationship: 0.36≤f1 / f≤1.46, which specifies the ratio of the focal length of the first lens L1 to the focal length of the camera optical lens. Within the range of the relationship, by reasonably allocating the optical focal length of the camera optical lens, the camera optical lens has better imaging quality and lower sensitivity. Preferably, 0.57≤f1 / f≤1.17 is satisfied.

[0074] The central curvature radius of the object side of the first lens L1 is defined as R1, and the central curvature radius of the image side of the first lens L1 is defined as R2, which satisfy the following relationship: -3.20≤(R1+R2) / (R1-R2)≤-0.69. By properly controlling the shape of the first lens L1, the first lens L1 can effectively correct the system spherical aberration. Preferably, -2.00≤(R1+R2) / (R1-R2)≤-0.86 is satisfied.

[0075] The axial thickness of the first lens L1 is d1, which satisfies the following relationship: 0.07≤d1 / TTL≤0.25, which specifies the ratio of the axial thickness of the first lens L1 to the total optical length. Within the range of the relationship, it is helpful to control the thickness of the first lens L1, facilitate injection molding, and help collect light, thereby ensuring a wide-angle design. Preferably, 0.11≤d1 / TTL≤0.20 is satisfied.

[0076] The camera optical lens also satisfies the following relationship: -6.07≤f2 / f≤-1.14, which specifies the ratio of the focal length f2 of the second lens L2 to the focal length f of the camera optical lens, and the field curvature of the camera optical lens can be effectively balanced within the range of the relationship. Preferably, -3.80≤f2 / f≤-1.42.

[0077] The central curvature radius of the object side of the second lens L2 is R3, and the central curvature radius of the image side of the second lens L2 is R4, which satisfies the following relationship: 1.37≤(R3+R4) / (R3-R4)≤5.07. This relationship specifies the shape of the second lens L2. When it is within the range, as the lens develops towards ultra-thin wide-angle, it is beneficial to correct the axial chromatic aberration problem. Preferably, 2.19≤(R3+R4) / (R3-R4)≤4.06 is satisfied.

[0078] The camera optical lens satisfies the following relationship: 0.02≤d3 / TTL≤0.08, which is conducive to achieving ultra-thinness within the range of the relationship. Preferably, 0.03≤d3 / TTL≤0.06 is satisfied.

[0079] The focal length of the third lens L3 is defined as f3, which satisfies the following relationship: 2.31≤f3 / f≤19.90, which specifies the ratio of the focal length of the third lens L3 to the focal length f of the camera optical lens. Within the range of the relationship, by reasonably allocating the focal length of the camera optical lens, the camera optical lens has better imaging quality and lower sensitivity. Preferably, 3.69≤f3 / f≤15.92 is satisfied.

[0080] The camera optical lens also satisfies the following relationship: 0.06≤d5 / TTL≤0.25, within the range of the relationship, it is conducive to achieving ultra-thinness. Preferably, 0.10≤d5 / TTL≤0.20 is satisfied.

[0081] The focal length of the fourth lens L4 is f4, which satisfies the following relationship: -39.50≤f4 / f≤1.97. Through the reasonable distribution of the optical power, the system has better imaging quality and lower sensitivity. Preferably, -24.69≤f4 / f≤1.58 is satisfied.

[0082] 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. When it is within the range, with the development of ultra-thin wide-angle, it is beneficial to correct the aberration of the off-axis picture angle and other problems. Preferably, -6.75≤(R7+R8) / (R7-R8)≤1.69 is satisfied.

[0083] The camera optical lens also satisfies the following relationship: 0.06≤d7 / TTL≤0.25, which is conducive to achieving ultra-thinness within the range of the relationship. Preferably, 0.10≤d7 / TTL≤0.20 is satisfied.

[0084] The focal length of the fifth lens L5 is f5, which satisfies the following relationship: -1.84≤f5 / f≤-0.53. The limitation of the fifth lens L5 can effectively make the light angle of the camera optical lens smooth and reduce the tolerance sensitivity. Preferably, -1.15≤f5 / f≤-0.66 is satisfied.

[0085] The fifth lens L5 also satisfies the following relationship: 0.05≤d9 / TTL≤0.20, which is conducive to achieving ultra-thinness within the range of the relationship. Preferably, 0.07≤d9 / TTL≤0.16 is satisfied.

[0086] 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 conducive to achieving ultra-thinness.

[0087] The combined focal length of the first lens L1 and the second lens L2 is f12, which satisfies the following relationship: 0.43≤f12 / f≤2.17. Within the range of the relationship, the aberration and distortion of the camera optical lens can be eliminated, and the back focal length of the camera optical lens can be suppressed to maintain the miniaturization of the imaging lens system. Preferably, 0.70≤f12 / f≤1.74 is satisfied.

[0088] The field of view FOV of the camera optical lens is greater than or equal to 79.00°, thereby achieving a wide angle.

[0089] The aperture value FNO of the camera optical lens is less than or equal to 1.94, thereby achieving a large aperture and good imaging performance of the camera optical lens. Preferably, FNO is less than or equal to 1.90.

[0090] The following examples are used to illustrate the imaging optical lens of the present invention. The symbols recorded in each example are as follows: The focal length, axial distance, central curvature radius, and axial thickness are in units of mm.

[0091] TTL: total optical length (the axial distance from the object side of the first lens L1 to the image surface Si), in mm;

[0092] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0093] Next, the technical solution of the present invention is specifically described with four implementation modes. At the same time, a comparative implementation mode is provided as a reference. When the range of the above relationship is exceeded, the technical effect of the present invention cannot be achieved.

[0094] (First Embodiment)

[0095] Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention. In this embodiment, the fourth lens L4 has positive refractive power.

[0096]

Table 1

[0097]

[0098] The meaning of each symbol is as follows.

[0099] S1: aperture;

[0100] R: radius of curvature at the center of the optical surface;

[0101] R1: the central curvature radius of the object side of the first lens L1;

[0102] R2: the central curvature radius of the image side surface of the first lens L1;

[0103] R3: the central curvature radius of the object side surface of the second lens L2;

[0104] R4: the central curvature radius of the image side surface of the second lens L2;

[0105] R5: the central curvature radius of the object side surface of the third lens L3;

[0106] R6: the central curvature radius of the image side surface of the third lens L3;

[0107] R7: the central curvature radius of the object side surface of the fourth lens L4;

[0108] R8: the central curvature radius of the image side surface of the fourth lens L4;

[0109] R9: the central curvature radius of the object side surface of the fifth lens L5;

[0110] R10: the central curvature radius of the image side surface of the fifth lens L5;

[0111] R11: the central curvature radius of the object side of the optical filter GF;

[0112] R12: the central curvature radius of the image side of the optical filter GF;

[0113] d: the axial thickness of the lens, the axial distance between lenses;

[0114] d0: the axial distance from the aperture S1 to the object side of the first lens L1;

[0115] d1: axial thickness of the first lens L1;

[0116] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0117] d3: axial thickness of the second lens L2;

[0118] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0119] d5: axial thickness of the third lens L3;

[0120] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0121] d7: axial thickness of the fourth lens L4;

[0122] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0123] d9: axial thickness of the fifth lens L5;

[0124] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the optical filter GF;

[0125] d11: axial thickness of the optical filter GF;

[0126] d12: the axial distance from the image side of the optical filter GF to the image surface Si;

[0127] nd: refractive index of d-line (d-line is green light with a wavelength of 555nm);

[0128] nd1: refractive index of the first lens L1 at the d-line;

[0129] nd2: refractive index of the d-line of the second lens L2;

[0130] nd3: refractive index of the third lens L3 at the d-line;

[0131] nd4: refractive index of the d-line of the fourth lens L4;

[0132] nd5: the refractive index of the fifth lens L5 at the d-line;

[0133] ndg: refractive index of the d-line of the optical filter GF;

[0134] vd: Abbe number;

[0135] v1: Abbe number of the first lens L1;

[0136] v2: Abbe number of the second lens L2;

[0137] v3: Abbe number of the third lens L3;

[0138] v4: Abbe number of the fourth lens L4;

[0139] v5: Abbe number of the fifth lens L5;

[0140] vg: Abbe number of the optical filter GF.

[0141] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0142]

Table 2

[0143]

[0144] For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the following formula (1). However, the present invention is not limited to the aspheric surface polynomial form represented by the formula (1).

[0145] z=(cr 2 ) / {1+[1-(k+1)(c 2r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0146] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 +A32r 32 (1)

[0148] Where, k is the cone coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, A32 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the vertical distance between the point on the aspheric curve and the optical axis, and z is the aspheric depth (the vertical distance between the point on the aspheric surface that is r away from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis).

[0149] Figure 2 , Figure 3 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively. Figure 4 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nm after passing through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0150] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 2.587 mm, the full field of view image height IH is 4.096 mm, and the field of view angle FOV in the diagonal direction is 78.67°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0151] (Second Embodiment)

[0152] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0153] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0154] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0155]

Table 3

[0156]

[0157]

[0158] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0159]

Table 4

[0160]

[0161]

[0162] Figure 6 , Figure 7 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging 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.

[0163] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 2.539 mm, the full field of view image height IH is 4.096 mm, and the field of view angle FOV in the diagonal direction is 79.51°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0164] (Third Embodiment)

[0165] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0166] Fig. 9 FIG. 3 is a third embodiment of an imaging optical lens 30 of the present invention. The fourth lens L4 has negative refractive power.

[0167] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0168]

Table 5

[0169]

[0170]

[0171] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0172]

Table 6

[0173]

[0174] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively. Fig.12 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 30 of the third embodiment. Fig.12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0175] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.827 mm, the full field of view image height IH is 4.096 mm, and the field of view angle FOV in the diagonal direction is 58.04°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0176] (Fourth Embodiment)

[0177] The meanings of symbols in the fourth embodiment are the same as those in the first embodiment.

[0178] Fig.13 FIG. 4 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0179] Tables 7 and 8 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0180]

Table 7

[0181]

[0182] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0183]

Table 8

[0184]

[0185]

[0186] Fig.14 , Fig.15 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Fig.16 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 40 of the third embodiment. Fig.16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0187] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 2.417 mm, the full field of view image height IH is 4.096 mm, and the field of view angle FOV in the diagonal direction is 82.33°. The camera optical lens 40 meets the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0188] Table 11 that appears later shows the values ​​corresponding to the parameters specified in the relationship equations for various numerical values ​​in each of the first, second, third, and fourth embodiments.

[0189] (Comparative Implementation)

[0190] The meanings of the symbols in the comparative embodiment are the same as those in the first embodiment.

[0191] Fig.17 Shown is a camera optical lens 50 according to a comparative embodiment of the present invention.

[0192] Tables 9 and 10 show design data of the imaging optical lens 50 according to the comparative embodiment of the present invention.

[0193]

Table 9

[0194]

[0195] Table 10 shows the aspherical surface data of each lens in the imaging optical lens 50 according to the comparative embodiment of the present invention.

[0196]

Table 10

[0197]

[0198]

[0199] Fig.18 , Fig.19Schematic diagrams of axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the camera optical lens 50 of the comparative embodiment are respectively shown. Fig. 20 It shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the camera optical lens 50 of the comparative embodiment. Fig. 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0200] Table 11 below lists the values ​​corresponding to the various relational expressions in the comparative embodiment according to the above relational expressions. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the above relational expression 0.50≤(R5+R6) / (R5-R6)≤0.81, and the imaging effect is poor.

[0201] In a comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 2.583 mm, the full field of view image height IH is 4.091 mm, and the field of view angle FOV in the diagonal direction is 76.95°. The camera optical lens 50 does not meet the design requirements of large aperture, wide angle, and ultra-thinness.

[0202]

Table 11

[0203]

[0204] Those skilled in the art will appreciate that the above-mentioned embodiments are specific embodiments for implementing the present invention, and in actual applications, various changes may be made thereto 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 in total, and the five lenses are, in 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; Among them, 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 on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, the on-axis thickness of the fifth lens is d9, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, 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, the central curvature radius of the object side surface of the fifth lens is R9, the central curvature radius 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 imaging optical lens according to claim 1, characterized in that: 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 the following relationship is satisfied: 5.00≤(d5+d7) / d3≤8.

00.

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

35.

4. The imaging optical lens according to claim 1, wherein: 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 curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, the axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.36≤f1 / f≤1.46; -3.20≤(R1+R2) / (R1-R2)≤-0.69; 0.07≤d1 / TTL≤0.

25.

5. The imaging 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 central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -6.07≤f2 / f≤-1.14; 1.37≤(R3+R4) / (R3-R4)≤5.07; 0.02≤d3 / TTL≤0.

08.

6. The imaging 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 focal length of the third lens is f3, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 2.31≤f3 / f≤19.90; 0.06≤d5 / TTL≤0.

25.

7. The imaging optical lens according to claim 1, characterized in that: The object side surface of the fourth lens is concave at the paraxial position, and the image side surface of the fourth lens is convex at the paraxial position; The focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -39.50≤f4 / f≤1.97; -10.80≤(R7+R8) / (R7-R8)≤2.11; 0.06≤d7 / TTL≤0.

25.

8. The imaging optical lens according to claim 1, wherein: 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 optical lens is TTL and satisfies the following relationship: -1.84≤f5 / f≤-0.53; 0.05≤d9 / TTL≤0.

20.

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

79.

10. The imaging 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.

Images