Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which sequentially comprises a first lens with negative refraction power, a second lens with negative refraction power, a third lens with positive refraction power, a fourth lens with positive refraction power, a fifth lens with negative refraction power and a sixth lens with negative refraction power from an object side to an image side. A fifth lens element with positive refractive power; and a sixth lens element with negative refractive power. Wherein the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2, the optical total length of the camera shooting optical lens is TTL, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the center curvature radius of the object side surface of the fourth lens is R7, the center curvature radius of the image side surface of the fourth lens is R8, the following relational expression is satisfied: 0.10 < = d2 / TTL < = 0.20; 0.60 < = f3 / f4 < = 1.40; 0.01 < = R7 / R8 < = 0.30.

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 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 the diversified needs of users, as the pixel area of ​​photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, a six-piece lens structure has gradually appeared in lens design. There is an urgent need for camera optical lenses with good optical performance. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a camera optical lens having good optical performance design requirements.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a camera optical lens, which comprises, from the object side to the image side, a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power;

[0005] Among them, the axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, the total optical length of the camera optical lens is TTL, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the following relationship is satisfied:

[0006] 0.10≤d2 / TTL≤0.20;

[0007] 0.60≤f3 / f4≤1.40;

[0008] 0.01≤R7 / R8≤0.30.

[0009] Preferably, the central 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, and the following relationship is satisfied:

[0010] 1.80≤(R1+R2) / (R1-R2)≤6.30.

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

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

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

[0014] Preferably, the object side surface of the first lens is convex at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; the focal length of the camera optical lens is f, the focal length of the first lens is f1, the axial thickness of the first lens is d1, and the following relationship is satisfied:

[0015] -6.21≤f1 / f≤-0.97;

[0016] 0.01≤d1 / TTL≤0.10.

[0017] Preferably, the object side surface of the second lens is concave at the paraxial position, and the image side surface of the second lens is convex at the paraxial position; the focal length of the camera optical lens is f, the focal length of the second lens is f2, 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, and the following relationship is satisfied:

[0018] -21.11≤f2 / f≤-3.75;

[0019] -9.81≤(R3+R4) / (R3-R4)≤-2.45;

[0020] 0.06≤d3 / TTL≤0.26.

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

[0022] 1.18≤f3 / f≤5.80;

[0023] -1.96≤(R5+R6) / (R5-R6)≤-0.31;

[0024] 0.02≤d5 / TTL≤0.26.

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

[0026] 1.29≤f4 / f≤5.84;

[0027] -3.71≤(R7+R8) / (R7-R8)≤-0.68;

[0028] 0.07≤d7 / TTL≤0.26.

[0029] Preferably, the object side surface of the fifth lens is convex at the paraxial position, and the image side surface of the fifth lens is convex at the paraxial position; the focal length of the camera optical lens is f, the focal length of the fifth lens is f5, the central 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, the axial thickness of the fifth lens is d9, and the following relationship is satisfied:

[0030] 0.56≤f5 / f≤2.34;

[0031] 0.13≤(R9+R10) / (R9-R10)≤0.50;

[0032] 0.05≤d9 / TTL≤0.18.

[0033] Preferably, the object side surface of the sixth lens is concave at the paraxial position, and the image side surface of the sixth lens is convex at the paraxial position; the focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the central curvature radius of the object side surface of the sixth lens is R11, the central curvature radius of the image side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the following relationship is satisfied:,

[0034] -4.36≤f6 / f≤-0.83;

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

[0036] 0.03≤d11 / TTL≤0.13.

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

[0038] The beneficial effect of the present invention is that the camera optical lens according to the present invention has excellent optical characteristics and good optical performance, and is particularly suitable for vehicle-mounted lenses and WEB camera lenses composed of camera elements such as CCD and CMOS for high pixels. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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:

[0040] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0041] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0042] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

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

[0044] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0045] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0046] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

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

[0048] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0049] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0050] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0051] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0052] Fig.13 is a schematic structural diagram of an imaging optical lens according to a fourth embodiment of the present invention;

[0053] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0054] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0055] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0056] Fig.17 is a schematic structural diagram of a camera optical lens according to a fifth embodiment of the present invention;

[0057] Fig.18 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0058] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0059] Fig. 20 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0060] Fig.21 is a schematic structural diagram of a camera optical lens according to a sixth embodiment of the present invention;

[0061] Fig. 22 yes Fig.21 Schematic diagram of axial aberration of the camera optical lens shown;

[0062] Fig.23 yes Fig.21 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0063] Fig.24 yes Fig.21 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0064] Fig.25 is a schematic structural diagram of a camera optical lens according to a comparative embodiment of the present invention;

[0065] Fig.26 yes Fig.25 Schematic diagram of axial aberration of the camera optical lens shown;

[0066] Fig. 27 yes Fig.25 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0067] Fig.28 yes Fig.25 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0068] 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.

[0069] With reference to the accompanying drawings, the technical solution of the present invention provides an imaging optical lens 10 , 20 , 30 , 40 , 50 , 60 . Figure 1 , 5 , 9, 13, 17, and 21 show the camera optical lenses 10, 20, 30, 40, 50, and 60 of the present invention, and the camera optical lenses 10, 20, 30, 40, 50, and 60 include 6 lenses in total. Specifically, the camera optical lenses 10, 20, 30, 40, 50, and 60 are, from the object side to the image side, the first lens L1, the second lens L2, the aperture S1, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6. An optical element such as an optical filter GF may be provided between the sixth lens L6 and the image plane Si.

[0070] The first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power. In other embodiments, each lens may also have other refractive power.

[0071] The axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2 is defined as d2, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.10≤d2 / TTL≤0.20. The relationship specifies the ratio of the distance between the first lens L1 and the second lens L2 to the total optical length. Within the range of the relationship, a value above a lower limit is conducive to a smooth transition of light near the aperture, and can effectively balance the field curvature of the camera optical lens, so that the field curvature offset of the central field of view is less than 0.01 mm; a value below an upper limit is conducive to controlling the total optical length of the camera optical lens.

[0072] The focal length of the third lens L3 is f3, and the focal length of the fourth lens L4 is f4, which satisfies the following relationship: 0.60≤f3 / f4≤1.40. The relationship specifies the ratio of the focal lengths of the third lens L3 and the fourth lens L4. The focal lengths of the two lenses are close, which helps to smoothly transition the light and improve the image quality.

[0073] The central curvature radius of the object side surface of the fourth lens L4 is R7, and the central curvature radius of the image side surface of the fourth lens L4 is R8, which satisfies the following relationship: 0.01≤R7 / R8≤0.30. This relationship specifies the shape of the fourth lens L4. Within the range of the relationship, it is helpful to alleviate the degree of deflection of light passing through the lens, so that the camera optical lens has better imaging quality and lower sensitivity.

[0074] When the above relationship equations are satisfied, the camera optical lenses 10, 20, 30, 40, 50, 60 have good optical performance and can meet the design requirements of large aperture and wide angle. According to the characteristics of the camera optical lenses 10, 20, 30, 40, 50, 60, the camera optical lenses 10, 20, 30, 40, 50, 60 are particularly suitable for vehicle-mounted lenses and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

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

[0076] In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all made of glass. Appropriate selection of glass lenses can improve the optical performance of the camera optical lens. In other optional embodiments, each lens can also be made of other materials.

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

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

[0079] The fifth lens L5 and the sixth lens L6 are glued together to reduce the overall volume of the camera optical lens. In addition, the two lenses are glued together to form an integral structure. When assembling the optical module, the two lenses can be installed by placing them once.

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

[0081] The focal length of the camera optical lens 10 is defined as f, which satisfies the following relationship: 5.00≤TTL / f≤7.00, which specifies the telephoto ratio. By being less than the upper limit of the relationship, the total optical length can be controlled to be shorter, and miniaturization can be easily achieved. On the other hand, by being greater than the lower limit of the relationship, it is easy to correct distortion and axial chromatic aberration, and good optical performance can be maintained.

[0082] In this embodiment, the object side surface of the first lens L1 is convex at the paraxial position, and the image side surface is concave at the paraxial position. In other optional embodiments, the object side surface and the image side surface of the first lens L1 can also be set to other concave and convex distributions.

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

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

[0085] In this embodiment, the object side surface of the second lens L2 is concave at the paraxial position, and the image side surface is convex at the paraxial position. In other optional embodiments, the object side surface and the image side surface of the second lens L2 can also be set to other concave and convex distributions.

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

[0087] 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 relationship: -9.81≤(R3+R4) / (R3-R4)≤-2.45. This relationship specifies the shape of the second lens L2. Within the range of the relationship, with the development of wide angle, it is beneficial to correct axial chromatic aberration and other problems. Preferably, -6.13≤(R3+R4) / (R3-R4)≤-3.06 is satisfied.

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

[0089] The object side surface of the third lens L3 is convex at the paraxial position, and the image side surface is convex at the paraxial position. In other optional embodiments, the object side surface and the image side surface of the third lens L3 can also be set to other concave and convex distributions.

[0090] The camera optical lens 10 also satisfies the following relationship: 1.18≤f3 / f≤5.80. When f3 / f satisfies the above relationship, by controlling the focal length value of the single lens and reasonably allocating the focal length, it is beneficial to control the temperature drift and achieve better temperature performance. Preferably, 1.89≤f3 / f≤4.64 is satisfied.

[0091] The central curvature radius of the object side of the third lens L3 is R5, and the central curvature radius of the image side of the third lens L3 is R6, which satisfies the following relationship: -1.96≤(R5+R6) / (R5-R6)≤-0.31, which specifies the shape of the third lens L3. Within this range, the degree of deflection of light can be reduced and chromatic aberration can be effectively corrected. Preferably, -1.22≤(R5+R6) / (R5-R6)≤-0.38 is satisfied.

[0092] The axial thickness of the third lens L3 is d5, which satisfies the following relationship: 0.02≤d5 / TTL≤0.26. Within the range of the relationship, it is beneficial to achieve miniaturization. Preferably, 0.04≤d5 / TTL≤0.20 is satisfied.

[0093] In this embodiment, the object side surface of the fourth lens L4 is convex at the paraxial position, and the image side surface is concave at the paraxial position. In other optional embodiments, the object side surface and the image side surface of the fourth lens L4 can also be set to other concave and convex distributions.

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

[0095] The central curvature radius of the object side of the fourth lens L4 is R7, and the central curvature radius of the image side of the fourth lens L4 is R8, and the following relationship is satisfied: -3.71≤(R7+R8) / (R7-R8)≤-0.68, which specifies the shape of the fourth lens L4. When within the range, with the development of telephoto, it is beneficial to correct the aberration of the off-axis picture angle and other problems. Preferably, -2.32≤(R7+R8) / (R7-R8)≤-0.85 is satisfied.

[0096] The axial thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.07≤d7 / TTL≤0.26. Within the range of the relationship, it is beneficial to achieve miniaturization. Preferably, 0.11≤d7 / TTL≤0.21 is satisfied.

[0097] In this embodiment, the object side surface of the fifth lens L5 is convex at the paraxial position, and the image side surface is convex at the paraxial position. In other optional embodiments, the object side surface and the image side surface of the fifth lens L5 can also be set to other concave and convex distributions.

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

[0099] The central curvature radius of the object side of the fifth lens L5 is R9, and the central curvature radius of the image side of the fifth lens L5 is R10, which satisfies the following relationship: 0.13≤(R9+R10) / (R9-R10)≤0.50, which specifies the shape of the fifth lens L5. When it is within the range, with the development of wide angle, it is beneficial to correct the aberration problem of off-axis picture angle. Preferably, 0.21≤(R9+R10) / (R9-R10)≤0.40 is satisfied.

[0100] The axial thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.05≤d9 / TTL≤0.18. Within the range of the relationship, it is beneficial to achieve miniaturization. Preferably, 0.08≤d9 / TTL≤0.14 is satisfied.

[0101] In this embodiment, the object side surface of the sixth lens L6 is concave at the paraxial position, and the image side surface is convex at the paraxial position. In other optional embodiments, the object side surface and the image side surface of the sixth lens L6 can also be set to other concave and convex distributions.

[0102] The focal length of the sixth lens L6 is defined as f6, which satisfies the following relationship: -4.36≤f6 / f≤-0.83. The above relationship stipulates that the sixth lens L6, the last lens, has a short focal length. Within the range of the relationship, it is helpful to collect light and ensure the amount of light. Preferably, -2.73≤f6 / f≤-1.03 is satisfied.

[0103] The central curvature radius of the object side of the sixth lens L6 is R11, and the central curvature radius of the image side of the sixth lens L6 is R12, which satisfies the following relationship: -3.71≤(R11+R12) / (R11-R12)≤-0.72, which specifies the shape of the sixth lens L6, helps to smoothly transition the light and improve the image quality. Preferably, -2.32≤(R11+R12) / (R11-R12)≤-0.90 is satisfied.

[0104] The axial thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.03≤d11 / TTL≤0.13. Within the range of the relationship, it is beneficial to achieve miniaturization. Preferably, 0.06≤d11 / TTL≤0.11 is satisfied.

[0105] 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.

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

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

[0108] Next, the technical solution of the present invention is specifically described with six 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.

[0109] (First Embodiment)

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

[0111]

Table 1

[0112]

[0113] The meaning of each symbol is as follows.

[0114] S1: aperture;

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

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

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

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

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

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

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

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

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

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

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

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

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

[0128] R14: the central curvature radius of the image side of the optical filter GF;

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

[0130] d1: axial thickness of the first lens L1;

[0131] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0132] d3: axial thickness of the second lens L2;

[0133] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0134] d5: axial thickness of the third lens L3;

[0135] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0136] d7: axial thickness of the fourth lens L4;

[0137] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0138] d9: axial thickness of the fifth lens L5;

[0139] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0140] d11: axial thickness of the sixth lens L6;

[0141] d12: the axial distance between the image side surface of the sixth lens L6 and the object side surface of the optical filter GF;

[0142] d13: axial thickness of the optical filter GF;

[0143] d14: the axial distance from the image side of the optical filter GF to the image plane Si;

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

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

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

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

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

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

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

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

[0152] vd: Abbe number;

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

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

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

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

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

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

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

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

[0161]

Table 2

[0162]

[0163] 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).

[0164] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A

[0165] 16r 16 (1)

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

[0167] Figure 2 , Figure 3 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively. Figure 4FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 550 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.

[0168] Table 15 that follows shows the values ​​corresponding to the various numerical values ​​in each embodiment and the parameters specified in the relational expressions.

[0169] As shown in Table 15, the first embodiment satisfies each relational expression.

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

[0171] (Second Embodiment)

[0172] The second embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment. Only the differences are listed below.

[0173] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

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

[0175]

Table 3

[0176]

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

[0178]

Table 4

[0179]

[0180] Figure 6 , Figure 7 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 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 550 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.

[0181] As shown in Table 15, the second embodiment satisfies each relational expression.

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

[0183] (Third Embodiment)

[0184] The third embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0185] Fig. 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

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

[0187]

Table 5

[0188]

[0189]

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

[0191]

Table 6

[0192]

[0193] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 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 550 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.

[0194] The following Table 15 lists the values ​​corresponding to the various relational expressions in this embodiment according to the above relational expressions. Obviously, the imaging optical lens 30 of this embodiment satisfies the above relational expressions.

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

[0196] (Fourth Embodiment)

[0197] The fourth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0198] Fig.13 FIG. 4 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

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

[0200]

Table 7

[0201]

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

[0203]

Table 8

[0204]

[0205]

[0206] Fig.14 , Fig.15 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 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 550 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.

[0207] The following Table 15 lists the values ​​corresponding to the various relational expressions in this embodiment according to the above relational expressions. Obviously, the imaging optical lens 40 of this embodiment satisfies the above relational expressions.

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

[0209] (Fifth Embodiment)

[0210] The fifth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0211] Fig.17 FIG. 1 shows an imaging optical lens 50 according to a fifth embodiment of the present invention.

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

[0213]

Table 9

[0214]

[0215]

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

[0217]

Table 10

[0218]

[0219] Fig.18 , Fig.19 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 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 550 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.

[0220] The following Table 15 lists the values ​​corresponding to the various relational expressions in this embodiment according to the above relational expressions. Obviously, the imaging optical lens 50 of this embodiment satisfies the above relational expressions.

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

[0222] (Sixth Embodiment)

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

[0224] Fig.21 FIG. 1 shows an imaging optical lens 60 according to a sixth embodiment of the present invention.

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

[0226]

Table 11

[0227]

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

[0229]

Table 12

[0230]

[0231]

[0232] Fig. 22 , Fig.23 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 nm after passing through the imaging optical lens 60 of the fifth embodiment are shown respectively. Fig.24 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 550 nm after passing through the imaging optical lens 60 of the sixth embodiment. Fig.24 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0233] The following Table 15 lists the values ​​corresponding to the various relational expressions in this embodiment according to the above relational expressions. Obviously, the imaging optical lens 60 of this embodiment satisfies the above relational expressions.

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

[0235] (Comparative Implementation)

[0236] The comparative embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0237] Fig.25 Shown is a camera optical lens 70 according to a comparative embodiment.

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

[0239]

Table 13

[0240]

[0241]

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

[0243]

Table 14

[0244]

[0245] Fig.26 , Fig. 27 Schematic diagrams of axial aberration and magnification chromatic aberration of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 nm after passing through the camera optical lens 70 of the comparative embodiment are respectively shown. Fig.28 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 550 nm after passing through the camera optical lens 70 of the comparative embodiment. Fig.28 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0246] The following Table 15 lists the values ​​corresponding to the various relational expressions in this embodiment according to the above relational expressions. Obviously, the imaging optical lens 70 of this embodiment satisfies the above relational expressions.

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

[0248] Table 15 below lists the values ​​corresponding to the various equations in the comparative embodiment according to the above equations. Obviously, the camera optical lens 70 of the comparative embodiment does not satisfy the above equation 0.10≤d2 / TTL≤0.20, and cannot balance the field curvature of the system.

[0249]

Table 15

[0250]

[0251] 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, in order from the object side to the image side: a first lens having negative refractive power, a second lens having negative refractive power, a third lens having positive refractive power, a fourth lens having positive refractive power, a fifth lens having positive refractive power, and a sixth lens having negative refractive power; Among them, the axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, the total optical length of the camera optical lens is TTL, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the following relationship is satisfied: 0.10≤d2 / TTL≤0.20; 0.60≤f3 / f4≤1.40; 0.01≤R7 / R8≤0.

30.

2. The imaging optical lens according to claim 1, characterized in that: The central curvature radius of the object side of the first lens is R1, and the central curvature radius of the image side of the first lens is R2, and the following relationship is satisfied: 1.80≤(R1+R2) / (R1-R2)≤6.

30.

3. The imaging optical lens according to claim 1, characterized in that: The fifth lens is cemented to the sixth lens.

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

00.

5. The imaging optical lens according to claim 1, wherein: The focal length of the camera optical lens is f, and satisfies the following relationship: 5.00≤TTL / f≤7.

00.

6. The imaging 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 camera optical lens is f, the focal length of the first lens is f1, the axial thickness of the first lens is d1, and the following relationship is satisfied: -6.21≤f1 / f≤-0.97; 0.01≤d1 / TTL≤0.

10.

7. The imaging optical lens according to claim 1, characterized in that: The object side surface of the second lens is concave at the paraxial position, and the image side surface of the second lens is convex at the paraxial position; The focal length of the camera optical lens is f, the focal length of the second lens is f2, 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, and the following relationship is satisfied: -21.11≤f2 / f≤-3.75; -9.81≤(R3+R4) / (R3-R4)≤-2.45; 0.06≤d3 / TTL≤0.

26.

8. The imaging optical lens according to claim 1, wherein: The object side surface of the third lens is convex at the paraxial position; the image side surface of the third lens is convex at the paraxial position; The focal length of the camera optical lens is f, the central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side of the third lens is R6, the axial thickness of the third lens is d5, and the following relationship is satisfied: 1.18≤f3 / f≤5.80; -1.96≤(R5+R6) / (R5-R6)≤-0.31; 0.02≤d5 / TTL≤0.

26.

9. The imaging optical lens according to claim 1, characterized in that: The object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; The focal length of the camera optical lens is f, the axial thickness of the fourth lens is d7, and the following relationship is satisfied: 1.29≤f4 / f≤5.84; -3.71≤(R7+R8) / (R7-R8)≤-0.68; 0.07≤d7 / TTL≤0.

26.

10. The imaging 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 convex at the paraxial position; The focal length of the camera optical lens is f, the focal length of the fifth lens is f5, the central curvature radius of the object side of the fifth lens is R9, the central curvature radius of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the following relationship is satisfied: 0.56≤f5 / f≤2.34; 0.13≤(R9+R10) / (R9-R10)≤0.50; 0.05≤d9 / TTL≤0.

18.

11. The imaging optical lens according to claim 1, characterized in that: The object side surface of the sixth lens is concave at the paraxial position, and the image side surface of the sixth lens is convex at the paraxial position; The focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the central curvature radius of the object side of the sixth lens is R11, the central curvature radius of the image side of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the following relationship is satisfied: -4.36≤f6 / f≤-0.83; -3.71≤(R11+R12) / (R11-R12)≤-0.72; 0.03≤d11 / TTL≤0.

13.

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

Images