Image capture optical lens

Abstract

An image capture optical lens (10, 20, 30, 40, 50, 60), sequentially comprising, from an object side to an image side: a first lens (L1) having negative refractive power, a second lens (L2) having negative refractive power, a third lens (L3) having positive refractive power, a fourth lens (L4) having positive refractive power, a fifth lens (L5) having positive refractive power, and a sixth lens (L6) having negative refractive power. The on-axis distance from the image-side surface of the first lens (L1) to the object-side surface of the second lens (L2) is d2, the total optical length of the image capture optical lens (10, 20, 30, 40, 50, 60) is TTL, the focal length of the third lens (L3) is f3, the focal length of the fourth lens (L4) is f4, the central curvature radius of the object-side surface of the fourth lens (L4) is R7, the central curvature radius of the image-side surface of the fourth lens (L4) is R8, and the following relational expressions are satisfied: 0.10≤d2 / TTL≤0.20; 0.60≤f3 / f4≤1.40; and 0.01≤R7 / R8≤0.30.

Description

Camera lens TECHNICAL FIELD

[0001] The present application relates to the field of optical lens, in particular to a camera lens suitable for smart phones, digital cameras and other portable terminal devices, as well as surveillance cameras, PC lenses, vehicle-mounted lenses and other camera devices. BACKGROUND

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera lenses has been increasing, and due to the reduction in the pixel size of photosensitive devices, combined with the current trend of electronic products towards light and thin portable designs, miniaturized camera lenses with good imaging quality have become the mainstream in the market. In order to achieve better imaging quality, multi-piece lens structures are often used. With the development of technology and the increasing demand for user diversification, under the condition of continuous reduction in the pixel area of photosensitive devices and the increasing demand for imaging quality, six-piece lens structures gradually appear in lens design. There is an urgent need for camera lenses with good optical performance.

[0003] SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a camera lens with good optical performance design requirements.

[0005] To solve the above technical problems, the embodiment of the present application provides a camera lens, which comprises, in order 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.

[0006] Wherein, 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 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 relationships are satisfied:

[0007] 0.10≤d2 / TTL≤0.20;

[0008] 0.60≤f3 / f4≤1.40;

[0009] 0.01≤R7 / R8≤0.30.

[0010] Preferably, the central curvature radius of the object side surface of the first lens is R1, the central curvature radius of the image side surface of the first lens is R2, and the following relationships are satisfied:

[0011] 1.80≤(R1+R2) / (R1-R2)≤6.30.

[0012] Preferably, the fifth lens and the sixth lens are cemented together.

[0013] 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.

[0014] Preferably, the focal length of the photographing optical lens is f, and the following relationship is satisfied: 5.00≤TTL / f≤7.00.

[0015] Preferably, the object side surface of the first lens is convex at the paraxial region, the image side surface of the first lens is concave at the paraxial region; the focal length of the photographing optical lens is f, the focal length of the first lens is f1, the on-axis thickness of the first lens is d1, and the following relationship is satisfied:

[0016] -6.21≤f1 / f≤-0.97;

[0017] 0.01≤d1 / TTL≤0.10.

[0018] Preferably, the object side surface of the second lens is concave at the paraxial region, the image side surface of the second lens is convex at the paraxial region; the focal length of the photographing optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object side surface of the second lens is R3, the central radius of curvature of the image side surface of the second lens is R4, the on-axis thickness of the second lens is d3, and the following relationship is satisfied:

[0019] -21.11≤f2 / f≤-3.75;

[0020] -9.81≤(R3+R4) / (R3-R4)≤-2.45;

[0021] 0.06≤d3 / TTL≤0.26.

[0022] Preferably, the object side surface of the third lens is convex at the paraxial region; the image side surface of the third lens is convex at the paraxial region; the focal length of the photographing optical lens is f, the central radius of curvature of the object side surface of the third lens is R5, the central radius of curvature of the image side surface of the third lens is R6, the on-axis thickness of the third lens is d5, and the following relationship is satisfied:

[0023] 1.18≤f3 / f≤5.80;

[0024] -1.96≤(R5+R6) / (R5-R6)≤-0.31;

[0025] 0.02≤d5 / TTL≤0.26.

[0026] Preferably, the object side surface of the fourth lens is convex at the paraxial region, the image side surface of the fourth lens is concave at the paraxial region; the focal length of the camera optical lens is f, the on-axis thickness of the fourth lens is d7, and the following relationship is met:

[0027] 1.29≤f4 / f≤5.84;

[0028] -3.71≤(R7+R8) / (R7-R8)≤-0.68;

[0029] 0.07≤d7 / TTL≤0.26.

[0030] Preferably, the object side surface of the fifth lens is convex at the paraxial region, the image side surface of the fifth lens is convex at the paraxial region; the focal length of the camera optical lens is f, the focal length of the fifth lens is f5, the central radius of curvature of the object side surface of the fifth lens is R9, the central radius of curvature of the image side surface of the fifth lens is R10, the on-axis thickness of the fifth lens is d9, and the following relationship is met:

[0031] 0.56≤f5 / f≤2.34;

[0032] 0.13≤(R9+R10) / (R9-R10)≤0.50;

[0033] 0.05≤d9 / TTL≤0.18.

[0034] Preferably, the object side surface of the sixth lens is concave at the paraxial region, the image side surface of the sixth lens is convex at the paraxial region; the focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the central radius of curvature of the object side surface of the sixth lens is R11, the central radius of curvature of the image side surface of the sixth lens is R12, the on-axis thickness of the sixth lens is d11, and the following relationship is met:

[0035] -4.36≤f6 / f≤-0.83;

[0036] -3.71≤(R11+R12) / (R11-R12)≤-0.72;

[0037] 0.03≤d11 / TTL≤0.13.

[0038] Preferably, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are made of glass.

[0039] The camera lens according to the present application has excellent optical characteristics and good optical performance, and is particularly suitable for vehicle-mounted lenses and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0041] Fig. 1 is a structural schematic diagram of a camera lens according to a first embodiment of the present application;

[0042] Fig. 2 is an axial aberration schematic diagram of the camera lens shown in Fig. 1;

[0043] Fig. 3 is a magnification chromatic aberration schematic diagram of the camera lens shown in Fig. 1;

[0044] Fig. 4 is a field curvature and distortion schematic diagram of the camera lens shown in Fig. 1;

[0045] Fig. 5 is a structural schematic diagram of a camera lens according to a second embodiment of the present application;

[0046] Fig. 6 is an axial aberration schematic diagram of the camera lens shown in Fig. 5;

[0047] Fig. 7 is a magnification chromatic aberration schematic diagram of the camera lens shown in Fig. 5;

[0048] Fig. 8 is a field curvature and distortion schematic diagram of the camera lens shown in Fig. 5;

[0049] Fig. 9 is a structural schematic diagram of a camera lens according to a third embodiment of the present application;

[0050] Fig. 10 is an axial aberration schematic diagram of the camera lens shown in Fig. 9;

[0051] Fig. 11 is a magnification chromatic aberration schematic diagram of the camera lens shown in Fig. 9;

[0052] Fig. 12 is a field curvature and distortion schematic diagram of the camera lens shown in Fig. 9;

[0053] Fig. 13 is a structural schematic diagram of a camera lens according to a fourth embodiment of the present application;

[0054] Fig. 14 is an axial aberration schematic diagram of the camera lens shown in Fig. 13;

[0055] Fig. 15 is a magnification chromatic aberration schematic diagram of the camera lens shown in Fig. 13;

[0056] Fig. 16 is a field curvature and distortion diagram of the photographing optical lens shown in Fig. 13;

[0057] Fig. 17 is a structural diagram of a photographing optical lens of a fifth embodiment of the present application;

[0058] Fig. 18 is an axial aberration diagram of the photographing optical lens shown in Fig. 17;

[0059] Fig. 19 is a lateral chromatic aberration diagram of the photographing optical lens shown in Fig. 17;

[0060] Fig. 20 is a field curvature and distortion diagram of the photographing optical lens shown in Fig. 17;

[0061] Fig. 21 is a structural diagram of a photographing optical lens of a sixth embodiment of the present application;

[0062] Fig. 22 is an axial aberration diagram of the photographing optical lens shown in Fig. 21;

[0063] Fig. 23 is a lateral chromatic aberration diagram of the photographing optical lens shown in Fig. 21;

[0064] Fig. 24 is a field curvature and distortion diagram of the photographing optical lens shown in Fig. 21;

[0065] Fig. 25 is a structural diagram of a photographing optical lens of a comparative embodiment of the present application;

[0066] Fig. 26 is an axial aberration diagram of the photographing optical lens shown in Fig. 25;

[0067] Fig. 27 is a lateral chromatic aberration diagram of the photographing optical lens shown in Fig. 25;

[0068] Fig. 28 is a field curvature and distortion diagram of the photographing optical lens shown in Fig. 25. DETAILED DESCRIPTION

[0069] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be realized even without these technical details and based on various changes and modifications of the following embodiments.

[0070] With reference to the drawings, the technical scheme of the present application provides a kind of camera optical lens 10,20,30,40,50,60.The camera optical lens 10,20,30,40,50,60 shown in Figure 1,5,9,13,17,21, the camera optical lens 10,20,30,40,50,60 includes 6 lenses.Therein, camera optical lens 10,20,30,40,50,60, from object side to image side in order: first lens L1, second lens L2, aperture S1, third lens L3, fourth lens L4, fifth lens L5 and sixth lens L6.Sixth lens L6 and image surface Si can be provided with optical filter (filter) GF and other optical elements.

[0071] The first lens L1 has negative refractive power, the second lens L1 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 can also have other refractive power.

[0072] 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. This 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, being higher than the lower limit helps the smooth transition of light near the stop, which 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 0.01mm; being lower than the upper limit helps to control the total optical length of the camera optical lens.

[0073] 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. This relationship specifies the ratio of the focal length of the third lens L3 and the fourth lens L4. The focal length values of the above two lenses are close, which helps the smooth transition of light and improves image quality.

[0074] 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 beneficial to moderate the degree of deflection of light passing through the lens, so that the camera optical lens has better imaging quality and lower sensitivity.

[0075] In the case of satisfying the above several relational expressions, the photographing optical lens 10, 20, 30, 40, 50, 60 has good optical performance while meeting the design requirements of large aperture and wide angle; according to the characteristics of the photographing optical lens 10, 20, 30, 40, 50, 60, the photographing optical lens 10, 20, 30, 40, 50, 60 is particularly suitable for vehicle-mounted lenses and WEB photographing lenses composed of high-pixel CCD, CMOS and other photographing elements.

[0076] Based on the above relational expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0077] In the present 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 of glass material, and appropriate selection of glass lenses can improve the optical performance of the photographing optical lens. In other alternative embodiments, each lens can also be of other materials.

[0078] 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.

[0079] The central curvature radius of the object side of the first lens L1 is defined as R1, and the central curvature radius of the image side of the first lens L1 is defined as R2, satisfying the following relational expression: 1.80≤(R1+R2) / (R1-R2)≤6.30, which defines the shape of the first lens L1. Within the range of the relational expression, the degree of light deviation through the lens can be moderated, aberration can be effectively improved, and imaging quality can be improved.

[0080] The fifth lens L5 and the sixth lens L6 are glued together. By gluing, the overall volume of the photographing optical lens can be reduced. In addition, by gluing, the two lenses form a whole structure, and the installation of the two lenses can be completed at one time when assembling the optical module.

[0081] 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 relational expression: v5-v6≥35.00, which defines the difference between the Abbe numbers of the glued fifth lens L5 and the sixth lens L6. Within this range, the material properties can be effectively distributed, and chromatic aberration can be effectively corrected, so that the chromatic aberration |LC|≤8μm.

[0082] The focal length of the photographing optical lens 10 is defined as f, and the following relationship is satisfied: 5.00≤TTL / f≤7.00, which defines 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, distortion and on-axis chromatic aberration can be easily corrected, and good optical performance can be maintained.

[0083] In the embodiment, the object side surface of the first lens L1 is convex at the paraxial region, and the image side surface is concave at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the first lens L1 can also be provided with other concave-convex distribution conditions.

[0084] The focal length of the first lens is defined as f1, and the following relationship is satisfied: -6.21≤f1 / f≤-0.97, which defines the ratio of the focal length f1 of the first lens L1 to the focal length f of the photographing optical lens 10. Within this range, it is helpful to achieve ultra-wide angle. Preferably, -3.88≤f1 / f≤-1.22 is satisfied.

[0085] The on-axis thickness of the first lens L1 is defined as d1, and the following relationship is satisfied: 0.01≤d1 / TTL≤0.10, which is within the range of the relationship, and is conducive to miniaturization. Preferably, 0.02≤d1 / TTL≤0.08 is satisfied.

[0086] In the embodiment, the object side surface of the second lens L2 is concave at the paraxial region, and the image side surface is convex at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the second lens L2 can also be provided with other concave-convex distribution conditions.

[0087] In the embodiment, the focal length of the second lens L2 is f2, and the following relationship is satisfied: -21.11≤f2 / f≤-3.75, which defines the ratio of the focal length f2 of the second lens L2 to the focal length of the photographing 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.

[0088] The central curvature radius of the object side surface of the second lens L2 is R3, and the central curvature radius of the image side surface of the second lens L2 is R4, and the following relationship is satisfied: -9.81≤(R3+R4) / (R3-R4)≤-2.45, which defines the shape of the second lens L2. Within the range of the relationship, as the wide angle development progresses, it is conducive to correcting on-axis chromatic aberration and other problems. Preferably, -6.13≤(R3+R4) / (R3-R4)≤-3.06 is satisfied.

[0089] The on-axis thickness of the second lens L2 is d3, and the following relationship is satisfied: 0.06≤d3 / TTL≤0.26. Within the range of the relationship, miniaturization is facilitated. Preferably, 0.10≤d3 / TTL≤0.21 is satisfied.

[0090] The object side surface of the third lens L3 is convex at the paraxial region, and the image side surface is convex at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the third lens L3 can also be provided with other concave-convex distribution conditions.

[0091] The imaging optical lens 10 also satisfies the following relationship: 1.18≤f3 / f≤5.80. When f3 / f satisfies the above relationship, the focal length value of the single lens is controlled, the focal length is reasonably distributed, the temperature drift is facilitated to be controlled, and the temperature performance is better. Preferably, 1.89≤f3 / f≤4.64 is satisfied.

[0092] The central curvature radius of the object side surface of the third lens L3 is R5, the central curvature radius of the image side surface of the third lens L3 is R6, and the following relationship is satisfied: -1.96≤(R5+R6) / (R5-R6)≤-0.31. The shape of the third lens L3 is specified, and within the 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.

[0093] The on-axis thickness of the third lens L3 is d5, and the following relationship is satisfied: 0.02≤d5 / TTL≤0.26. Within the range of the relationship, miniaturization is facilitated. Preferably, 0.04≤d5 / TTL≤0.20 is satisfied.

[0094] In the present embodiment, the object side surface of the fourth lens L4 is convex at the paraxial region, and the image side surface is concave at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the fourth lens L4 can also be provided with other concave-convex distribution conditions.

[0095] The imaging optical lens 10 also satisfies the following relationship: 1.29≤f4 / f≤5.84. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, 2.06≤f4 / f≤4.67 is satisfied.

[0096] 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, and the following relationship is satisfied: -3.71≤(R7+R8) / (R7-R8)≤-0.68. The shape of the fourth lens L4 is specified, and within the range, with the development of long focal length, it is beneficial to correct the aberration of the off-axis angle of view and other problems. Preferably, -2.32≤(R7+R8) / (R7-R8)≤-0.85 is satisfied.

[0097] The on-axis thickness of the fourth lens L4 is d7, and the following relationship is satisfied: 0.07≤d7 / TTL≤0.26. Within the range of the relationship, miniaturization is facilitated. Preferably, 0.11≤d7 / TTL≤0.21 is satisfied.

[0098] In the embodiment, the object side surface of the fifth lens L5 is convex at the paraxial region, and the image side surface is convex at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the fifth lens L5 can also be provided with other concave-convex distribution conditions.

[0099] The focal length of the fifth lens L5 is f5, and the following relationship is satisfied: 0.56≤f5 / f≤2.34. Through reasonable distribution of the optical power, the system has better imaging quality and lower sensitivity. Preferably, 0.89≤f5 / f≤1.87 is satisfied.

[0100] The central curvature radius of the object side surface of the fifth lens L5 is R9, and the central curvature radius of the image side surface of the fifth lens L5 is R10, and the following relationship is satisfied: 0.13≤(R9+R10) / (R9-R10)≤0.50. The shape of the fifth lens L5 is specified. When within the range, with the development of wide-angle, it is beneficial to correct the aberration problem of the off-axis angle. Preferably, 0.21≤(R9+R10) / (R9-R10)≤0.40 is satisfied.

[0101] The on-axis thickness of the fifth lens L5 is d9, and the following relationship is satisfied: 0.05≤d9 / TTL≤0.18. Within the range of the relationship, miniaturization is facilitated. Preferably, 0.08≤d9 / TTL≤0.14 is satisfied.

[0102] In the embodiment, the object side surface of the sixth lens L6 is concave at the paraxial region, and the image side surface is convex at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the sixth lens L6 can also be provided with other concave-convex distribution conditions.

[0103] The focal length of the sixth lens L6 is defined as f6, and the following relationship is satisfied: -4.36≤f6 / f≤-0.83. The above relationship specifies that the last lens, the sixth lens L6, 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.

[0104] The center curvature radius of the object side surface of the sixth lens L6 is R11, and the center curvature radius of the image side surface of the sixth lens L6 is R12, which satisfy the following relationship: -3.71≤(R11+R12) / (R11-R12)≤-0.72, which defines the shape of the sixth lens L6, and is conducive to the smooth transition of light and improves the image quality. Preferably, -2.32≤(R11+R12) / (R11-R12)≤-0.90 is satisfied.

[0105] The on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.03≤d11 / TTL≤0.13, and within the range of the relationship, it is beneficial to realize miniaturization. Preferably, 0.06≤d11 / TTL≤0.11 is satisfied.

[0106] The imaging optical lens of the present application will be described below by examples. The symbols recorded in each example are as follows. The units of focal length, on-axis distance, center curvature radius, and on-axis thickness are mm.

[0107] TTL: total optical length (on-axis distance from the object side surface of the first lens L1 to the image surface Si), unit: mm;

[0108] F-number FNO: refers to the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter.

[0109] Next, the technical solutions of the present application will be specifically described in six embodiments, and a comparative embodiment is provided as a reference description. When the range exceeds the above relationship, the technical effects of the present application cannot be achieved.

[0110] (First embodiment)

[0111] Table 1 shows the design data of the imaging optical lens 10 of the first embodiment of the present application.

[0112]

Table 1

[0113] Among them, the meanings of each symbol are as follows.

[0114] S1: aperture;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0129] d: on-axis thickness of a lens, on-axis distance between lenses;

[0130] d1: on-axis thickness of the first lens L1;

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

[0132] d3: on-axis thickness of the second lens L2;

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

[0134] d5: on-axis thickness of the third lens L3;

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

[0136] d7: on-axis thickness of the fourth lens L4;

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

[0138] d9: on-axis thickness of the fifth lens L5;

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

[0140] d11: on-axis thickness of the sixth lens L6;

[0141] d12: on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the optical filter GF;

[0142] d13: on-axis thickness of the optical filter GF;

[0143] d14: on-axis distance from the image-side surface of the optical filter GF to the image plane Si;

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

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

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

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

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

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

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

[0151] ndg: refractive index at 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 the 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 photographing optical lens 10 according to the first embodiment of the present application.

[0161]

Table 2

[0162] For convenience, aspherical surfaces of respective lenses use aspherical surfaces shown in the following formula (1). However, the present application is not limited to the aspherical polynomial form represented by the formula (1). z = (cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A 16r 16 (1)

[0163] where k is a conic constant, A4, A6, A8, A10, A12, A14, A16 are aspherical coefficients, c is a curvature at the center of an optical surface, r is a perpendicular distance of a point on an aspherical curve from an optical axis, and z is an aspherical depth (a perpendicular distance between a point on an aspherical surface at a distance r from an optical axis and a tangent plane at the vertex of the aspherical surface).

[0164] FIGS. 2, 3 show axial aberrations and magnification chromatic aberrations of light having wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 nm, respectively, after passing through the imaging optical lens 10 of the first embodiment. FIG. 4 shows field curvature and distortion of light having a wavelength of 550 nm after passing through the imaging optical lens 10 of the first embodiment. The field curvature S of FIG. 4 is in the sagittal direction, and the field curvature T is in the tangential direction.

[0165] Table 15 appearing later shows values corresponding to the values of the parameters defined in the respective numerical values and relationships in the embodiments.

[0166] As shown in Table 15, the first embodiment satisfies the respective relationships.

[0167] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 10 is 3.036 mm, the full field image height IH is 4.032 mm, and the field angle FOV in the diagonal direction is 128.00°. The imaging optical lens 10 has good optical performance, with on-axis and off-axis chromatic aberrations sufficiently corrected, and has excellent optical characteristics.

[0168] (Second Embodiment)

[0169] The second embodiment is basically the same as the first embodiment, and the symbol meanings are the same as those of the first embodiment. Only the different points are listed below.

[0170] FIG. 5 shows the imaging optical lens 20 of the second embodiment of the present application.

[0171] Table 3 shows the design data of the imaging optical lens 20 of the second embodiment of the present application.

[0172]

Table 3

[0173] Table 4 shows the aspherical surface data of the first lens L1 and the fourth lens L4 in the imaging optical lens 20 of the second embodiment of the present application.

[0174]

Table 4

[0175] Fig. 6, Fig. 7 respectively show the axial aberration and the lateral chromatic aberration 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. Fig. 8 shows the field curvature and the distortion of light with a wavelength of 550 nm after passing through the imaging optical lens 20 of the second embodiment. The field curvature S of Fig. 8 is the sagittal field curvature, and T is the tangential field curvature.

[0176] As shown in Table 15, the second embodiment satisfies each relationship.

[0177] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 2.693 mm, the full field image height IH is 3.768 mm, and the field of view FOV in the diagonal direction is 128.00°. The imaging optical lens 20 has good optical performance, and the on-axis and off-axis chromatic aberrations are sufficiently corrected, and has excellent optical characteristics.

[0178] (Third Embodiment)

[0179] The third embodiment is basically the same as the first embodiment, and the symbol meanings are the same as the first embodiment. Only the different points are listed below.

[0180] Fig. 9 shows the imaging optical lens 30 of the third embodiment of the present application.

[0181] Table 5 shows the design data of the imaging optical lens 30 of the third embodiment of the present application.

[0182]

Table 5

[0183] Table 6 shows the aspherical surface data of the first lens L1 and the fourth lens L4 in the imaging optical lens 30 of the third embodiment of the present application.

[0184]

Table 6

[0185] Fig. 10, Fig. 11 respectively show axial aberration and lateral chromatic aberration diagrams of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 nm after passing through the photographing optical lens 30 of the third embodiment. Fig. 12 shows field curvature and distortion diagrams of light with a wavelength of 550 nm after passing through the photographing optical lens 30 of the third embodiment. The field curvature S of Fig. 12 is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0186] The following Table 15 lists the numerical values corresponding to each of the above relationships in the present embodiment. Obviously, the photographing optical lens 30 of the present embodiment satisfies the above relationships.

[0187] In the present embodiment, the entrance pupil diameter ENPD of the photographing optical lens 30 is 3.183 mm, the full field image height IH is 4.026 mm, and the diagonal direction field of view FOV is 128.00°. The photographing optical lens 30 has good optical performance, and the on-axis and off-axis color aberrations are fully corrected, and has excellent optical characteristics.

[0188] (Fourth Embodiment)

[0189] The fourth embodiment is basically the same as the first embodiment, and the symbol meanings are the same as the first embodiment. Only the different points are listed below.

[0190] Fig. 13 shows the photographing optical lens 40 of the fourth embodiment of the present application.

[0191] Table 7 shows the design data of the photographing optical lens 40 of the fourth embodiment of the present application.

[0192] [Table 7]

[0193] Table 8 shows the aspheric surface data of the first lens L1 and the fourth lens L4 of the photographing optical lens 40 of the fourth embodiment of the present application.

[0194] [Table 8]

[0195] Fig. 14, Fig. 15 respectively show axial aberration and lateral chromatic aberration diagrams of light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 nm after passing through the photographing optical lens 40 of the fourth embodiment. Fig. 16 shows field curvature and distortion diagrams of light with a wavelength of 550 nm after passing through the photographing optical lens 40 of the fourth embodiment. The field curvature S of Fig. 16 is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0196] The following Table 15 lists the numerical values corresponding to each of the above relationships in the present embodiment. Obviously, the imaging optical lens 40 of the present embodiment satisfies the above relationships.

[0197] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 40 is 3.150 mm, the full field image height IH is 4.201 mm, and the diagonal direction field of view FOV is 128.00°. The imaging optical lens 40 has good optical performance, and the on-axis and off-axis chromatic aberrations are sufficiently corrected, and has excellent optical characteristics.

[0198] (Fifth Embodiment)

[0199] The fifth embodiment is basically the same as the first embodiment, and the symbol meanings are the same as the first embodiment. Only the different points are listed below.

[0200] Fig. 17 shows the imaging optical lens 50 of the fifth embodiment of the present application.

[0201] Table 9 shows the design data of the imaging optical lens 50 of the fifth embodiment of the present application.

[0202] [Table 9]

[0203] Table 10 shows the aspheric surface data of the first lens L1 and the fourth lens L4 of the imaging optical lens 50 of the fifth embodiment of the present application.

[0204] [Table 10]

[0205] Figs. 18, 19 show the axial aberration and the magnification chromatic aberration diagrams of the light with wavelengths of 700 nm, 625 nm, 550 nm, 500 nm, and 450 nm passing through the imaging optical lens 50 of the fifth embodiment, respectively. Fig. 20 shows the field curvature and distortion diagrams of the light with a wavelength of 550 nm passing through the imaging optical lens 50 of the fifth embodiment. The field curvature S of Fig. 20 is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0206] The following Table 15 lists the numerical values corresponding to each of the above relationships in the present embodiment. Obviously, the imaging optical lens 50 of the present embodiment satisfies the above relationships.

[0207] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 50 is 3.093 mm, the full field image height IH is 4.068 mm, and the diagonal direction field of view FOV is 128.00°. The imaging optical lens 50 has good optical performance, and the on-axis and off-axis chromatic aberrations are sufficiently corrected, and has excellent optical characteristics.

[0208] (Sixth Embodiment)

[0209] The sixth embodiment is basically the same as the first embodiment, and the symbol meanings are the same as the first embodiment. Only the different points are listed below.

[0210] FIG. 21 shows the imaging optical lens 60 of the sixth embodiment of the present application.

[0211] Table 11 shows the design data of the imaging optical lens 60 of the sixth embodiment of the present application.

[0212]

Table 11

[0213] Table 12 shows the aspherical surface data of the first lens L1 and the fourth lens L4 of the imaging optical lens 60 of the sixth embodiment of the present application.

[0214]

Table 12

[0215] FIGS. 22 and 23 respectively show the axial aberration and the lateral chromatic aberration of the 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. FIG. 24 shows the field curvature and the distortion of the light with a wavelength of 550 nm after passing through the imaging optical lens 60 of the sixth embodiment. The field curvature S of FIG. 24 is the sagittal field curvature, and T is the tangential field curvature.

[0216] The following Table 15 lists the values corresponding to each of the above relationships in the present embodiment. Obviously, the imaging optical lens 60 of the present embodiment satisfies the above relationships.

[0217] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 60 is 2.445 mm, the full field image height IH is 3.648 mm, and the field angle FOV in the diagonal direction is 128.00°. The imaging optical lens 60 has good optical performance, and the on-axis and off-axis color aberrations are sufficiently corrected, and has excellent optical characteristics.

[0218] (Comparative Embodiment)

[0219] The comparative embodiment is basically the same as the first embodiment, and the symbol meanings are the same as the first embodiment. Only the different points are listed below.

[0220] FIG. 25 shows the imaging optical lens 70 of the comparative embodiment.

[0221] Table 13 shows the design data of the imaging optical lens 70 of the comparative embodiment.

[0222] Table 13

[0223] Table 14 shows the aspherical surface data of the first lens L1 and the fourth lens L4 in the imaging optical lens 70 of the comparative embodiment of the present application.

[0224] Table 14

[0225] Fig. 26, Fig. 27 respectively show the axial aberration and the lateral chromatic aberration of the light with wavelength of 700nm, 625nm, 550nm, 500nm, and 450nm after passing through the imaging optical lens 70 of the comparative embodiment. Fig. 28 shows the field curvature and the distortion of the light with wavelength of 550nm after passing through the imaging optical lens 70 of the comparative embodiment. The field curvature S of Fig. 28 is the sagittal field curvature, and T is the tangential field curvature.

[0226] The following Table 15 lists the values corresponding to each of the above relationships in the present embodiment. Obviously, the imaging optical lens 70 of the present embodiment satisfies the above relationships.

[0227] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 70 is 2.877mm, the full field image height IH is 4.003mm, and the field angle FOV in the diagonal direction is 128.00°.

[0228] The following Table 15 lists the values corresponding to each of the above relationships in the comparative embodiment. Obviously, the imaging optical lens 70 of the comparative embodiment does not satisfy the above relationship 0.10≤d2 / TTL≤0.20, and cannot balance the field curvature of the system.

[0229] Table 15

[0230] It is to be understood that the above-described embodiments are merely illustrative of the principles of the application and that numerous and various modifications can be effected thereto without departing from the spirit and scope of the application.

Claims

A camera optical lens characterized in that, The camera lens sequentially comprises, from an object side to an image side: a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power; Wherein, an on-axis distance from an image side surface of the first lens to an object side surface of the second lens is d2, an overall optical length of the camera lens is TTL, a focal length of the third lens is f3, a focal length of the fourth lens is f4, a central curvature radius of the object side surface of the fourth lens is R7, a central curvature radius of the image side surface of the fourth lens is R8, and the following relationships are satisfied: 0.10≤d2 / TTL≤0.20; 0.60≤f3 / f4≤1.40; 0.01≤R7 / R8≤0.

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

30. The camera optical lens according to claim 1, characterized in that, The fifth lens and the sixth lens are cemented together. The camera optical lens according to claim 1 or 3, characterized in that, An Abbe number of the fifth lens is V5, an Abbe number of the sixth lens is V6, and the following relationship is satisfied: V5-V6≥35.

00. The camera optical lens according to claim 1, characterized in that, A focal length of the camera lens is f, and the following relationship is satisfied: 5.00≤TTL / f≤7.

00. The camera optical lens according to claim 1, characterized in that, The object side surface of the first lens is convex at a paraxial region, and the image side surface of the first lens is concave at the paraxial region; A focal length of the camera lens is f, a focal length of the first lens is f1, an on-axis thickness of the first lens is d1, and the following relationships are satisfied: -6.21≤f1 / f≤-0.97; 0.01≤d1 / TTL≤0.

10. The camera optical lens according to claim 1, characterized in that, The object side surface of the second lens is concave at a paraxial region, and the image side surface of the second lens is convex at the paraxial region; A focal length of the camera lens is f, a focal length of the second lens is f2, a central curvature radius of the object side surface of the second lens is R3, a central curvature radius of the image side surface of the second lens is R4, an on-axis thickness of the second lens is d3, and the following relationships are satisfied: -21.11≤f2 / f≤-3.75; -9.81≤(R3+R4) / (R3-R4)≤-2.45; 0.06≤d3 / TTL≤0.

26. The camera optical lens according to claim 1, characterized in that, The object side surface of the third lens is convex at a paraxial region, and the image side surface of the third lens is convex at the paraxial region; A focal length of the camera lens is f, a central curvature radius of the object side surface of the third lens is R5, a central curvature radius of the image side surface of the third lens is R6, an on-axis thickness of the third lens is d5, and the following relationships are satisfied: 1.18≤f3 / f≤5.80; -1.96≤(R5+R6) / (R5-R6)≤-0.31; 0.02≤d5 / TTL≤0.

26. The camera optical lens according to claim 1, characterized in that, The object side surface of the fourth lens is convex at a paraxial region, and the image side surface of the fourth lens is concave at the paraxial region; A focal length of the camera optical lens is f, an on-axis thickness of the fourth lens is d7, and the following relationships are satisfied: 1.29≤f4 / f≤5.84; -3.71≤(R7+R8) / (R7-R8)≤-0.68; 0.07≤d7 / TTL≤0.

26. The camera optical lens according to claim 1, characterized in that, An object side surface of the fifth lens is convex at a paraxial region, and an image side surface of the fifth lens is convex at the paraxial region; A focal length of the camera optical lens is f, a focal length of the fifth lens is f5, a central curvature radius of the object side surface of the fifth lens is R9, a central curvature radius of the image side surface of the fifth lens is R10, an on-axis thickness of the fifth lens is d9, and the following relationships are satisfied: 0.56≤f5 / f≤2.34; 0.13≤(R9+R10) / (R9-R10)≤0.50; 0.05≤d9 / TTL≤0.

18. The camera optical lens according to claim 1, characterized in that, An object side surface of the sixth lens is concave at a paraxial region, and an image side surface of the sixth lens is convex at the paraxial region; A focal length of the camera optical lens is f, a focal length of the sixth lens is f6, a central curvature radius of the object side surface of the sixth lens is R11, a central curvature radius of the image side surface of the sixth lens is R12, an on-axis thickness of the sixth lens is d11, and the following relationships are satisfied: -4.36≤f6 / f≤-0.83; -3.71≤(R11+R12) / (R11-R12)≤-0.72; 0.03≤d11 / TTL≤0.

13. The camera 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