Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens, which comprises five lenses in sequence from an object side to an image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power, the distance on the axis from the image side face of the third lens to the object side face of the fourth lens is d6, the total optical length of the camera shooting optical lens is TTL, the focal length of the first lens is f1, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the center curvature radiuses of the object side face and the image side face of the third lens near the axis are R5 and R6 respectively. The center curvature radiuses of the object side surface and the image side surface of the fifth lens at the paraxial position are R9 and R10 respectively, the focal length of the camera shooting optical lens is f, and the following relational expression is satisfied: d6 / TTL is greater than or equal to 0.20 and less than or equal to 0.36; (f4-f5) / f1 is more than or equal to 6.00 and less than or equal to 10.10; -1.00 < = (R5 + R6) / (R5-R6) < =-0.70; -0.80 < = (R9 + R10) / f < =-0.39.

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, PC lenses, and vehicle-mounted 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, coupled with the trend of today's electronic products to have good functions and a light 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 telephoto camera lenses with excellent optical characteristics, large aperture, telephoto, ultra-thinness, and fully corrected aberrations. Summary of the invention

[0003] In view of the above problems, the object of the present invention is to provide a camera optical lens which has good optical performance and meets the design requirements of fully corrected aberrations, large aperture, long focal length and ultra-thinness.

[0004] To achieve the above-mentioned purpose, 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 negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; wherein, the axial distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the total optical length of the camera optical lens is TTL, the focal length of the first lens is f1, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the central curvature radius of the object side surface of the third lens at the paraxial position is R5, the central curvature radius of the image side surface of the third lens at the paraxial position is R6, the central curvature radius of the object side surface of the fifth lens at the paraxial position is R9, the central curvature radius of the image side surface of the fifth lens at the paraxial position is R10, the focal length of the camera optical lens is f, and satisfies the following relationship:

[0005] 0.20≤d6 / TTL≤0.36;

[0006] 6.00≤(f4-f5) / f1≤10.10;

[0007] -1.00≤(R5+R6) / (R5-R6)≤-0.70;

[0008] -0.80≤(R9+R10) / f≤-0.39.

[0009] Preferably, the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, and the on-axis thickness of the third lens is d5, satisfying the following relationship:

[0010] 1.50≤d1 / (d3+d5)≤3.50.

[0011] Preferably, the effective radius of the object side surface of the first lens is SD11, the on-axis distance between the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens is SAG11, and the image height of the camera optical lens in a field of view of 1.0 is IH, satisfying the following relationship: 0.39≤SD11*SAG11 / IH≤0.65.

[0012] 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 convex at the paraxial position; the central curvature radius of the object side surface of the first lens at the paraxial position is R1, the central curvature radius of the image side surface of the first lens at the paraxial position is R2, the axial thickness of the first lens is d1, and the following relationship is satisfied:

[0013] 0.18≤f1 / f≤0.65;

[0014] -1.44≤(R1+R2) / (R1-R2)≤-0.42;

[0015] 0.08≤d1 / TTL≤0.32.

[0016] 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 curvature radius of the object side surface of the second lens at the paraxial position is R3, the central curvature radius of the image side surface of the second lens at the paraxial position is R4, the axial thickness of the second lens is d3, and the following relationship is satisfied:

[0017] -1.89≤f2 / f≤-0.49;

[0018] 0.75≤(R3+R4) / (R3-R4)≤5.28;

[0019] 0.02≤d3 / TTL≤0.10.

[0020] Preferably, the object side surface of the third lens is concave at the paraxial position, and the image side surface of the third lens is concave at the paraxial position; the focal length of the third lens is f3, the axial thickness of the third lens is d5, and the following relationship is satisfied:

[0021] -2.84≤f3 / f≤-0.35;

[0022] 0.01≤d5 / TTL≤0.06.

[0023] 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 central curvature radius of the object side surface of the fourth lens at the paraxial position is R7, the central curvature radius of the image side surface of the fourth lens at the paraxial position is R8, the axial thickness of the fourth lens is d7, and the following relationship is satisfied:

[0024] 0.53≤f4 / f≤2.26;

[0025] 1.30≤(R7+R8) / (R7-R8)≤10.54;

[0026] 0.04≤d7 / TTL≤0.14.

[0027] Preferably, the object side surface of the fifth lens is concave 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, and the following relationship is satisfied:

[0028] -5.46≤f5 / f≤-0.73;

[0029] -16.50≤(R9+R10) / (R9-R10)≤-2.05;

[0030] 0.03≤d9 / TTL≤0.20.

[0031] Preferably, the field of view angle of the camera optical lens at a field of view of 1.0 is FOV, and satisfies the following relationship: f / FOV≥8.10.

[0032] Preferably, the aperture value of the camera optical lens is FNO, and satisfies: FNO≤2.40.

[0033] 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 fully corrected aberrations, large aperture, long focus, and ultra-thinness, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses and vehicle-mounted lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are 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 work, among which:

[0035] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0036] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0037] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0038] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0039] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0040] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0041] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0042] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0043] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0044] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0045] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0046] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0047] Fig.13is a schematic structural diagram of a camera optical lens according to a fourth embodiment of the present invention;

[0048] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0049] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0050] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0051] Fig.17 is a schematic structural diagram of an imaging optical lens according to a fifth embodiment of the present invention;

[0052] Fig.18 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0053] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0054] Fig. 20 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0055] 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.

[0056] Reference Figure 1-Figure 20 The technical solution of the present invention provides a camera optical lens 10, 20, 30, 40, 50. Figure 1 , 5 , 9, 13, and 17 show the camera optical lenses 10, 20, 30, 40, and 50 of the present invention, which include five lenses in total. Specifically, the camera optical lenses include, from the object side to the image side, a first lens L1, an aperture S1, 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.

[0057] The first lens L, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of plastic. Each lens may also be made of other materials.

[0058] The axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 is defined as d6, and the total optical length of the camera optical lens is defined as TTL, which satisfies the following relationship: 0.20≤d6 / TTL≤0.36, which specifies the ratio of the air gap between the third lens L3 and the fourth lens L4 to the total optical length. Within the range of the conditional expression, it is helpful to compress the total optical length of the system and achieve an ultra-thin effect.

[0059] The focal length of the first lens L1 is defined as f1, the focal length of the fourth lens L4 is defined as f4, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: 6.00≤(f4-f5) / f1≤10.10, which specifies the ratio of the focal length difference between the fourth lens and the fifth lens to the focal length of the first lens. Within the range of the conditional expression, the field curvature of the system can be effectively balanced, so that the field curvature offset of the central field of view is less than 0.025 mm.

[0060] The central curvature radius of the object side surface of the third lens L3 at the paraxial position is defined as R5, and the central curvature radius of the image side surface of the third lens L3 at the paraxial position is defined as R6, which satisfy the following relationship: -1.00≤(R5+R6) / (R5-R6)≤-0.70, which specifies the shape of the third lens. Within the range of the conditional expression, the degree of deflection of light is reduced, and chromatic aberration is effectively corrected, so that the chromatic aberration |LC|≤1.0μm.

[0061] The central curvature radius of the object side surface of the fifth lens L5 at the paraxial position is defined as R9, the central curvature radius of the image side surface of the fifth lens L5 at the paraxial position is defined as R10, and the focal length of the camera optical lens is f, which satisfies the following relationship: -0.80≤(R9+R10) / f≤-0.39. The shape of the fifth lens is defined, and within the range of the conditional expression, it is beneficial to correct the astigmatism and distortion of the camera lens, so that the distortion |Distortion|≤1.1%, thereby reducing the possibility of vignetting.

[0062] When the above-mentioned conditional expressions are met, the camera optical lenses 10, 20, 30, 40, 50 have good optical performance and can meet the design requirements of large aperture, long focal length and ultra-thinness. According to the characteristics of the camera optical lenses 10, 20, 30, 40, 50, the camera optical lenses 10, 20, 30, 40, 50 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0063] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further detailed as follows.

[0064] The on-axis thickness of the first lens L1 is defined as d1, the on-axis thickness of the second lens L2 is defined as d3, and the on-axis thickness of the third lens L3 is defined as d5, which satisfy the following relationship: 1.50≤d1 / (d3+d5)≤3.50, which specifies the on-axis thickness ratio of the first lens, the second lens, and the third lens. Within the range of the conditional expression, it is helpful to compress the total length of the optical system and achieve an ultra-thin effect.

[0065] The effective radius of the object side surface of the first lens L1 is defined as SD11, the on-axis distance from the intersection of the object side surface of the first lens L1 and the optical axis to the vertex of the effective radius of the object side surface of the first lens L1 is defined as SAG11, the image height of the imaging optical lens in a field of view of 1.0 is IH, and the following relationship is satisfied: 0.39≤SD11*SAG11 / IH≤0.65, which specifies the shape of the first lens, which is within the range of the conditional expression and is conducive to the processing and assembly of the lens.

[0066] The object side surface of the first lens L1 is convex at the near axis, and the image side surface is convex at the near axis, and the first lens L1 has positive refractive power. The object side surface and the image side surface of the first lens L1 can also be set to other concave and convex distributions.

[0067] The focal length f of the camera optical lens and the focal length f1 of the first lens L1 satisfy the following relationship: 0.18≤f1 / f≤0.65, which specifies the ratio of the positive refractive power of the first lens L1 to the overall focal length. Within the specified range, the first lens L1 has an appropriate positive refractive power, which is beneficial to reducing system aberrations and is beneficial to the development of the lens towards ultra-thinness and wide angle. Preferably, 0.29≤f1 / f≤0.52 is satisfied.

[0068] The central curvature radius of the object side of the first lens L1 at the paraxial position is R1, and the central curvature radius of the image side of the first lens L1 at the paraxial position is R2, which satisfies the following relationship: -1.44≤(R1+R2) / (R1-R2)≤-0.42, and the shape of the first lens L1 is reasonably controlled so that the first lens L1 can effectively correct the system spherical aberration. Preferably, -0.90≤(R1+R2) / (R1-R2)≤-0.52 is satisfied.

[0069] The axial thickness of the first lens L1 is d1, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.08≤d1 / TTL≤0.32. Within the conditional range, it is conducive to miniaturization. Preferably, 0.13≤d1 / TTL≤0.26 is satisfied.

[0070] The object side surface of the second lens L2 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the second lens L2 has negative refractive power. The object side surface and the image side surface of the second lens L2 can also be set to other concave and convex distributions.

[0071] The focal length of the second lens L2 is f2, which satisfies the following relationship: -1.89≤f2 / f≤-0.49. By controlling the negative focal length of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system. Preferably, -1.18≤f2 / f≤-0.62 is satisfied.

[0072] The central curvature radius of the object side of the second lens L2 at the paraxial position is R3, and the central curvature radius of the image side of the second lens L2 at the paraxial position is R4, which satisfies the following relationship: 0.75≤(R3+R4) / (R3-R4)≤5.28, which specifies the shape of the second lens L2. When it is within the range, with the development of ultra-thin wide-angle, it is beneficial to correct axial chromatic aberration and other problems. Preferably, 1.20≤(R3+R4) / (R3-R4)≤4.22 is satisfied.

[0073] The axial thickness of the second lens L2 is d3, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.02≤d3 / TTL≤0.10. Within the conditional range, it is conducive to miniaturization. Preferably, 0.03≤d3 / TTL≤0.08 is satisfied.

[0074] The object side surface of the third lens L3 is concave at the paraxial position, and the image side surface is concave at the paraxial position, and the third lens L3 has negative refractive power. The object side surface and the image side surface of the third lens L3 can also be set to other concave or convex distributions.

[0075] The focal length of the camera optical lens is f, and the focal length of the third lens L3 is f3, which satisfies the following relationship: -2.84≤f3 / f≤-0.35. Through the reasonable distribution of optical focal length, the system has better imaging quality and lower sensitivity. Preferably, -1.77≤f3 / f≤-0.44 is satisfied.

[0076] The axial thickness of the third lens L3 is d5, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.01≤d5 / TTL≤0.06. Within the conditional range, it is conducive to miniaturization. Preferably, 0.02≤d5 / TTL≤0.05 is satisfied.

[0077] The object side surface of the fourth lens L4 is concave at the paraxial position, and the image side surface is convex at the paraxial position, and the fourth lens L4 has positive refractive power. The object side surface and the image side surface of the fourth lens L4 can also be set to other concave and convex distributions.

[0078] The focal length of the camera optical lens is f, and the focal length of the fourth lens L4 is f4, which satisfies the following relationship: 0.53≤f4 / f≤2.26. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, 0.85≤f4 / f≤1.81 is satisfied.

[0079] The central curvature radius of the object side of the fourth lens L4 at the paraxial position is R7, and the central curvature radius of the image side of the fourth lens L4 at the paraxial position is R8, which satisfies the following relationship: 1.30≤(R7+R8) / (R7-R8)≤10.54, which specifies the shape of the fourth lens L4. Within the conditional range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct the aberration of the off-axis picture angle and other problems. Preferably, 2.08≤(R7+R8) / (R7-R8)≤8.43 is satisfied.

[0080] The axial thickness of the fourth lens L4 is d7, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.04≤d7 / TTL≤0.14. Within the conditional range, it is conducive to miniaturization. Preferably, 0.06≤d7 / TTL≤0.11 is satisfied.

[0081] The object side surface of the fifth lens L5 is concave at the paraxial position, and the image side surface is convex at the paraxial position, and the fifth lens L5 has negative refractive power. The object side surface and the image side surface of the fifth lens L5 can also be set to other concave and convex distributions.

[0082] The focal length of the camera optical lens is f, and the focal length of the fifth lens L5 is f5, which satisfies the following relationship: -5.46≤f5 / f≤-0.73. By limiting the fifth lens L5, the light angle of the camera optical lens can be effectively smoothed and the tolerance sensitivity can be reduced. Preferably, -3.42≤f5 / f≤-0.91 is satisfied.

[0083] The central curvature radius of the object side of the fifth lens L5 at the paraxial position is R9, the central curvature radius of the image side of the fifth lens L5 at the paraxial position is R10, and the following relationship is satisfied: -16.50≤(R9+R10) / (R9-R10)≤-2.05, which specifies the shape of the fifth lens L5. 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, -10.31≤(R9+R10) / (R9-R10)≤-2.56 is satisfied.

[0084] The axial thickness of the fifth lens L5 is d9, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.03≤d9 / TTL≤0.20. Within the conditional range, it is conducive to miniaturization. Preferably, 0.05≤d9 / TTL≤0.16 is satisfied.

[0085] The focal length of the camera optical lens is f, and the field of view angle of the camera optical lens at a field of view of 1.0 is FOV, which satisfies the following relationship: f / FOV≥8.10. Within the conditional range, it is conducive to achieving wide angle.

[0086] The aperture value FNO of the camera optical lens is less than or equal to 2.40, thereby achieving a large aperture and good imaging performance of the camera optical lens.

[0087] 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.

[0088] TTL: total optical length (the axial distance from the object side of the first lens L1 to the image surface Si), in mm;

[0089] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0090] Next, the technical solution of the present invention is specifically described with five implementation modes.

[0091] (First Embodiment)

[0092] Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0093]

Table 1

[0094]

[0095] The meaning of each symbol is as follows.

[0096] S1: aperture;

[0097] R: radius of curvature at the center of the optical surface;

[0098] R1: the central curvature radius of the object side of the first lens L1 at the paraxial position;

[0099] R2: the central curvature radius of the image side of the first lens L1 at the paraxial position;

[0100] R3: the central curvature radius of the object side of the second lens L2 at the paraxial position;

[0101] R4: the central curvature radius of the image side of the second lens L2 at the paraxial position;

[0102] R5: the central curvature radius of the object side of the third lens L3 at the paraxial position;

[0103] R6: the central curvature radius of the image side surface of the third lens L3 at the paraxial position;

[0104] R7: the central curvature radius of the object side of the fourth lens L4 at the paraxial position;

[0105] R8: the central curvature radius of the image side surface of the fourth lens L4 at the paraxial position;

[0106] R9: the central curvature radius of the object side of the fifth lens L5 at the paraxial position;

[0107] R10: the central curvature radius of the image side surface of the fifth lens L5 at the paraxial position;

[0108] R11: The central curvature radius of the object side of the optical filter GF at the paraxial position;

[0109] R12: The central curvature radius of the image side of the optical filter GF at the paraxial position;

[0110] d: the axial thickness of the lens, the axial distance between lenses;

[0111] d0: the axial distance from the aperture S1 to the object side of the first lens L1;

[0112] d1: axial thickness of the first lens L1;

[0113] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0114] d3: axial thickness of the second lens L2;

[0115] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0116] d5: axial thickness of the third lens L3;

[0117] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0118] d7: axial thickness of the fourth lens L4;

[0119] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0120] d9: axial thickness of the fifth lens L5;

[0121] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the optical filter GF;

[0122] d11: axial thickness of the optical filter GF;

[0123] d12: the axial distance from the image side of the optical filter GF to the image surface Si;

[0124] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0125] nd1: refractive index of the first lens L1 at the d-line;

[0126] nd2: refractive index of the d-line of the second lens L2;

[0127] nd3: refractive index of the third lens L3 at the d-line;

[0128] nd4: refractive index of the d-line of the fourth lens L4;

[0129] nd5: the refractive index of the fifth lens L5 at the d-line;

[0130] ndg: refractive index of the d-line of the optical filter GF;

[0131] vd: Abbe number;

[0132] v1: Abbe number of the first lens L1;

[0133] v2: Abbe number of the second lens L2;

[0134] v3: Abbe number of the third lens L3;

[0135] v4: Abbe number of the fourth lens L4;

[0136] v5: Abbe number of the fifth lens L5;

[0137] vg: Abbe number of the optical filter GF.

[0138] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0139]

Table 2

[0140]

[0141]

[0142] 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).

[0143] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 (1)

[0144] Where, k is the cone coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24 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).

[0145] 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 and 470 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.

[0146] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 3.290 mm, the full field of view (1.0 field of view) image height IH is 2.560 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 35.06°. The camera optical lens 10 meets the design requirements of large aperture, telephoto, and ultra-thin, and its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.

[0147] It can be understood that the 1.0 field of view image height refers to half of 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.

[0148] (Second Embodiment)

[0149] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0150] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0151] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0152]

Table 3

[0153]

[0154] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0155]

Table 4

[0156]

[0157]

[0158] 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 and 470 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.

[0159] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 3.290 mm, the full field of view (1.0 field of view) image height IH is 2.560 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 35.11°. The camera optical lens 20 meets the design requirements of large aperture, long focus, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0160] (Third Embodiment)

[0161] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0162] Fig. 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0163] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0164]

Table 5

[0165]

[0166]

[0167] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0168]

Table 6

[0169]

[0170] 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 and 470 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.

[0171] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.290 mm, the full field of view (1.0 field of view) image height IH is 2.560 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 34.88°. The camera optical lens 30 meets the design requirements of large aperture, long focus, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0172] (Fourth Embodiment)

[0173] The meanings of symbols in the fourth embodiment are the same as those in the first embodiment.

[0174] Fig.13 FIG. 4 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0175] Tables 7 and 8 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0176]

Table 7

[0177]

[0178] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0179]

Table 8

[0180]

[0181]

[0182] 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 and 470 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Fig.16FIG. 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 fourth 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.

[0183] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 3.306 mm, the full field of view (1.0 field of view) image height IH is 2.560 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 34.92°. The camera optical lens 40 meets the design requirements of large aperture, long focus, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0184] (Fifth Embodiment)

[0185] The meanings of symbols in the fifth embodiment are the same as those in the first embodiment.

[0186] Fig.17 FIG. 1 shows an imaging optical lens 50 according to a fifth embodiment of the present invention.

[0187] Tables 9 and 10 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0188]

Table 9

[0189]

[0190] Table 10 shows aspherical surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0191]

Table 10

[0192]

[0193]

[0194] Fig.18 , Fig.19 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 50 of the fifth embodiment are shown respectively. Fig. 20 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 50 of the fifth 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.

[0195] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 3.290 mm, the full field of view (1.0 field of view) image height IH is 2.559 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 35.01°. The camera optical lens 50 meets the design requirements of large aperture, long focus, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0196]

Table 11

[0197]

[0198]

[0199] 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 negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; Among them, the axial distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the total optical length of the camera optical lens is TTL, the focal length of the first lens is f1, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the central curvature radius of the object side surface of the third lens at the paraxial position is R5, the central curvature radius of the image side surface of the third lens at the paraxial position is R6, the central curvature radius of the object side surface of the fifth lens at the paraxial position is R9, the central curvature radius of the image side surface of the fifth lens at the paraxial position is R10, the focal length of the camera optical lens is f, and satisfies the following relationship: 0.20≤d6 / TTL≤0.36; 6.00≤(f4-f5) / f1≤10.10; -1.00≤(R5+R6) / (R5-R6)≤-0.70; -0.80≤(R9+R10) / f≤-0.

39.

2. The imaging optical lens according to claim 1, characterized in that: The on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, and the on-axis thickness of the third lens is d5, which satisfy the following relationship: 1.50≤d1 / (d3+d5)≤3.

50.

3. The imaging optical lens according to claim 1, characterized in that: The effective radius of the object side surface of the first lens is SD11, the axial distance between the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens is SAG11, and the image height of the camera optical lens in a field of view of 1.0 is IH, which satisfies the following relationship: 0.39≤SD11*SAG11 / IH≤0.

65.

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 convex at the paraxial position; The central curvature radius of the object side of the first lens at the paraxial position is R1, the central curvature radius of the image side of the first lens at the paraxial position is R2, the axial thickness of the first lens is d1, and the following relationship is satisfied: 0.18≤f1 / f≤0.65; -1.44≤(R1+R2) / (R1-R2)≤-0.42; 0.08≤d1 / TTL≤0.

32.

5. The imaging optical lens according to claim 1, wherein: 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 curvature radius of the object side of the second lens at the paraxial position is R3, the central curvature radius of the image side of the second lens at the paraxial position is R4, the axial thickness of the second lens is d3, and the following relationship is satisfied: -1.89≤f2 / f≤-0.49; 0.75≤(R3+R4) / (R3-R4)≤5.28; 0.02≤d3 / TTL≤0.

10.

6. The imaging optical lens according to claim 1, characterized in that: The object side surface of the third lens is concave at the paraxial position, and the image side surface of the third lens is concave at the paraxial position; The focal length of the third lens is f3, the axial thickness of the third lens is d5, and the following relationship is satisfied: -2.84≤f3 / f≤-0.35; 0.01≤d5 / TTL≤0.

06.

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 central curvature radius of the object side of the fourth lens at the paraxial position is R7, the central curvature radius of the image side of the fourth lens at the paraxial position is R8, the axial thickness of the fourth lens is d7, and the following relationship is satisfied: 0.53≤f4 / f≤2.26; 1.30≤(R7+R8) / (R7-R8)≤10.54; 0.04≤d7 / TTL≤0.

14.

8. The imaging optical lens according to claim 1, characterized in that: The object side surface of the fifth lens is concave 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, and satisfies the following relationship: -5.46≤f5 / f≤-0.73; -16.50≤(R9+R10) / (R9-R10)≤-2.05; 0.03≤d9 / TTL≤0.

20.

9. The imaging optical lens according to claim 1, characterized in that: The field of view angle of the camera optical lens at a field of view of 1.0 is FOV, and satisfies the following relationship: f / FOV≥8.

10.

10. The imaging optical lens according to claim 1, characterized in that: The aperture value of the camera optical lens is FNO, and satisfies: FNO≤2.40.

Images