Photographing optical lens

Abstract

Disclosed in the present invention is a photographing optical lens, comprising six lenses, which successively include: a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having positive refractive power, and a sixth lens having negative refractive power. The focal length of the photographing optical lens is f; the focal lengths of the second lens and the fourth lens are f2 and f4 respectively; the on-axis thicknesses of the first lens and the second lens are d1 and d3 respectively; 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 central radii of curvature of the object-side surface and the image-side surface of the first lens in the paraxial region are R1 and R2 respectively; the central radius of curvature of the image-side surface of the third lens in the paraxial region is R6; the central radius of curvature of the object-side surface of the fourth lens in the paraxial region is R7; and the following relational expressions are satisfied: 7.00≤(f2-f4) / f≤10.00; 2.50≤(d1+d3) / d2≤4.50; -0.70≤R1 / R2≤-0.20; and -5.00≤R7 / R6≤-1.50.

Description

Camera optical lens TECHNICAL FIELD

[0001] The present application relates to the field of optical lens, in particular to a camera optical 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 intelligent devices, the demand for miniaturized camera optical lenses is increasing, and due to the reduction of the pixel size of photosensitive devices, in addition to the current trend of electronic products being light and thin, the miniaturized camera optical lens with good imaging quality has become the mainstream in the market. In order to obtain better imaging quality, multi-piece lens structure is often used. With the development of technology and the increasing of user's diversified needs, under the condition of continuous reduction of the pixel area of photosensitive devices and the increasing of the requirement of system for imaging quality, six-piece lens structure gradually appears in the lens design. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, large aperture, wide angle, ultra-thin and fully corrected aberration.

[0003] SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a camera optical lens which has good optical performance while meeting the design requirements of full correction of aberration, large aperture, wide angle, and ultra-thin.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application provides a camera optical lens, which comprises six lenses, the six lenses are arranged in order from the object side to the image side as follows: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power; wherein the focal length of the camera optical lens is f, the focal length of the second lens is f2, the focal length of the fourth lens is f4, the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, the on-axis distance between the image side surface of the first lens and the object side surface of the second lens is d2, the central curvature radius of the object side surface of the first lens at the near axis is R1, the central curvature radius of the image side surface of the first lens at the near axis is R2, the central curvature radius of the image side surface of the third lens at the near axis is R6, and the central curvature radius of the object side surface of the fourth lens at the near axis is R7, and the following relationships are satisfied:

[0006] 7.00≤(f2-f4) / f≤10.00;

[0007] 2.50≤(d1+d3) / d2≤4.50;

[0008] -0.70≤R1 / R2≤-0.20;

[0009] -5.00≤R7 / R6≤-1.50.

[0010] Preferably, the on-axis distance between the intersection of the image-side surface of the fifth lens and the optical axis and the effective radius vertex of the image-side surface of the fifth lens is SAG52, the effective radius of the image-side surface of the fifth lens is SD52, and the following relationship is met:

[0011] 0.45≤|SAG52 / SD52|≤0.70.

[0012] Preferably, the field of view angle of the camera optical lens at 1.0 field of view is FOV, the image height of the camera optical lens at 1.0 field of view is IH, and the following relationship is met:

[0013] 65.00≤FOV*f / IH≤85.00.

[0014] Preferably, the object-side surface of the first lens is concave at the paraxial region, the image-side surface of the first lens is concave at the paraxial region; the focal length of the first lens is f1, the total optical length of the camera optical lens is TTL, and the following relationship is met:

[0015] -3.77≤f1 / f≤-1.05;

[0016] -1.33≤(R1+R2) / (R1-R2)≤-0.17;

[0017] 0.03≤d1 / TTL≤0.14.

[0018] Preferably, the object-side surface of the second lens is convex at the paraxial region, the image-side surface of the second lens is concave at the paraxial region; the central curvature radius of the object-side surface of the second lens at the paraxial region is R3, the central curvature radius of the image-side surface of the second lens at the paraxial region is R4, the total optical length of the camera optical lens is TTL, and the following relationship is met:

[0019] 1.90≤f2 / f≤9.81;

[0020] -14.41≤(R3+R4) / (R3-R4)≤-2.69;

[0021] 0.04≤d3 / TTL≤0.15.

[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 third lens is f3, the central radius of curvature of the object side surface of the third lens at the paraxial region is R5, the on-axis thickness of the third lens is d5, the total track length of the camera optical lens is TTL, and the following relationships are satisfied:

[0023] 0.58≤f3 / f≤2.02;

[0024] -0.19≤(R5+R6) / (R5-R6)≤0.29;

[0025] 0.06≤d5 / TTL≤0.19.

[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 central radius of curvature of the image side surface of the fourth lens at the paraxial region is R8, the on-axis thickness of the fourth lens is d7, the total track length of the camera optical lens is TTL, and the following relationships are satisfied:

[0027] -9.04≤f4 / f≤-2.14;

[0028] 0.89≤(R7+R8) / (R7-R8)≤4.97;

[0029] 0.03≤d7 / TTL≤0.10.

[0030] Preferably, the object side surface of the fifth lens is concave at the paraxial region; the image side surface of the fifth lens is convex at the paraxial region; the focal length of the fifth lens is f5, the central radius of curvature of the object side surface of the fifth lens at the paraxial region is R9, the central radius of curvature of the image side surface of the fifth lens at the paraxial region is R10, the on-axis thickness of the fifth lens is d9, the total track length of the camera optical lens is TTL, and the following relationships are satisfied:

[0031] 0.33≤f5 / f≤1.28;

[0032] 0.64≤(R9+R10) / (R9-R10)≤2.00;

[0033] 0.09≤d9 / TTL≤0.31.

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

[0035] -2.56≤f6 / f≤-0.62;

[0036] 1.12≤(R11+R12) / (R11-R12)≤3.85;

[0037] 0.04≤d11 / TTL≤0.13.

[0038] Preferably, the aperture value of the camera optical lens is FNO, and the following relationship is satisfied: FNO≤1.91.

[0039] The camera optical lens according to the present application has excellent optical characteristics, and has the characteristics of sufficient aberration correction, large aperture, wide angle, and ultra-thin, and is particularly suitable for mobile phone camera lens assemblies, WEB camera lenses, and vehicle-mounted 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 creative effort based on these drawings.

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

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

[0043] FIG. 3 is a relative color aberration schematic diagram of the camera optical lens shown in FIG. 1;

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

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

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

[0047] FIG. 7 is a relative color aberration schematic diagram of the camera optical lens shown in FIG. 5;

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

[0049] Fig. 9 is a schematic view of the structure of a photographing optical lens according to a third embodiment of the present application;

[0050] Fig. 10 is a schematic view of axial aberration of the photographing optical lens shown in Fig. 9;

[0051] Fig. 11 is a schematic view of lateral chromatic aberration of the photographing optical lens shown in Fig. 9;

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

[0053] Fig. 13 is a schematic view of the structure of a photographing optical lens according to a fourth embodiment of the present application;

[0054] Fig. 14 is a schematic view of axial aberration of the photographing optical lens shown in Fig. 13;

[0055] Fig. 15 is a schematic view of lateral chromatic aberration of the photographing optical lens shown in Fig. 13;

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

[0057] Fig. 17 is a schematic view of the structure of a photographing optical lens according to a comparative embodiment of the present application;

[0058] Fig. 18 is a schematic view of axial aberration of the photographing optical lens shown in Fig. 17;

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

[0060] Fig. 20 is a schematic view of field curvature and distortion of the photographing optical lens shown in Fig. 17. DETAILED DESCRIPTION

[0061] In order to make the objectives, technical solutions, and advantages of the present application clearer, each embodiment 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 each embodiment 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.

[0062] With reference to the accompanying drawings 1-16, the technical scheme of the present application provides a camera optical lens 10, 20, 30, 40. As shown in FIG. 1, 5, 9, 13, the camera optical lens 10, 20, 30, 40 comprises six lenses. Specifically, the camera optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, an aperture S1, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. An optical filter GF or other optical element can be arranged between the sixth lens L6 and the image plane Si.

[0063] 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 plastic. Each lens can also be made of other materials.

[0064] The focal length of the camera optical lens is defined as f, the focal length of the second lens L2 is defined as f2, and the focal length of the fourth lens L4 is defined as f4. The following relationship is satisfied: 7.00≤(f2-f4) / f≤10.00. Within the range of the conditional expression, by reasonably allocating the focal length of the optical system, the astigmatism and distortion of the camera optical lens are corrected, the distortion |Distortion|≤10% is achieved, and the possibility of dark corner generation is reduced.

[0065] The on-axis thickness of the first lens L1 is defined as d1, the on-axis thickness of the second lens L2 is defined as d3, and the on-axis distance between the image side surface of the first lens L1 and the object side surface of the second lens L2 is defined as d2. The following relationship is satisfied: 2.50≤(d1+d3) / d2≤4.50. Within the range of the conditional expression, by reasonably allocating the air gap between the lenses, the assembly difficulty in the actual production process is reduced, and the yield is improved.

[0066] The central curvature radius of the object side surface of the first lens L1 at the near-axis is defined as R1, and the central curvature radius of the image side surface of the first lens L1 at the near-axis is defined as R2. The following relationship is satisfied: -0.70≤R1 / R2≤-0.20. The shape of the first lens L1 is specified, and within the range of the conditional expression, the degree of deflection of light passing through the lens is moderated, chromatic aberration is effectively corrected, and the chromatic aberration |LC|≤6.0μm is achieved.

[0067] The central curvature radius of the image side surface of the third lens L3 at the near-axis is defined as R6, and the central curvature radius of the object side surface of the fourth lens L4 at the near-axis is defined as R7. The following relationship is satisfied: -5.00≤R7 / R6≤-1.50. Within the range of the conditional expression, the current state of the image side surface of the third lens L3 and the object side surface of the fourth lens L4 is specified, which helps the smooth transition of nearby light and improves the image quality.

[0068] When the above conditions are met, the camera optical lens 10, 20, 30, 40 has good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thin; according to the characteristics of the camera optical lens 10, 20, 30, 40, the camera optical lens 10, 20, 30, 40 is particularly suitable for mobile phone camera lens assemblies and WEB cameras composed of high-pixel CCD, CMOS, and other camera elements.

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

[0070] The on-axis distance between the intersection of the image side surface of the fifth lens L5 and the optical axis and the effective radius vertex of the image side surface of the fifth lens L5 is SAG52, and the effective radius of the image side surface of the fifth lens L5 is SD52, which satisfies the following relationship: 0.45≤|SAG52 / SD52|≤0.70. Within the range of the condition, the camera optical lens has good stray light performance and is easy to process.

[0071] The field of view of the camera optical lens at 1.0 field of view is FOV, and the image height of the camera optical lens at 1.0 field of view is IH, which satisfies the following relationship: 65.00≤FOV*f / IH≤85.00. Within the range of the condition, it is helpful for wide-angle imaging of a larger image.

[0072] The object side surface of the first lens L1 is concave at the near axis, and the image side surface is concave at the near axis. The first lens L1 has a negative refractive power. The object side surface and the image side surface of the first lens L1 can also be provided with other concave and convex distributions.

[0073] The focal length of the first lens L1 is f1, which satisfies the following relationship: -3.77≤f1 / f≤-1.05. The ratio of the negative refractive power of the first lens L1 to the overall focal length is specified. When it is within the specified range, the first lens has an appropriate negative refractive power, which is beneficial to reducing system aberration and developing the lens towards ultra-thin and wide-angle. Preferably, -2.35≤f1 / f≤-1.31.

[0074] The central curvature radius R1 of the object side surface of the first lens L1 at the near axis and the central curvature radius R2 of the image side surface of the first lens L1 at the near axis satisfy the following relationship: -1.33≤(R1+R2) / (R1-R2)≤-0.17. Within the range of the condition, the shape of the first lens L1 is reasonably controlled, so that the first lens L1 can effectively correct the system spherical aberration. Preferably, -0.83≤(R1+R2) / (R1-R2)≤-0.21.

[0075] The total optical length of the camera optical lens is TTL, and the following relationship is met: 0.03≤d1 / TTL≤0.14, which is beneficial to miniaturization within the conditional range. Preferably, 0.05≤d1 / TTL≤0.11 is met.

[0076] The object side surface of the second lens L2 is convex at the paraxial region, the image side surface is concave at the paraxial region, and the second lens L2 has a positive refractive power. The object side surface and the image side surface of the second lens L2 can also be provided with other concave and convex distribution conditions.

[0077] The focal length of the second lens L2 is f2, and the following relationship is met: 1.90≤f2 / f≤9.81, which is beneficial to correcting aberration of the optical system by controlling the positive focal power of the second lens L2 within a reasonable range. Preferably, 3.04≤f2 / f≤7.85 is met.

[0078] The central curvature radius of the object side surface of the second lens L2 at the paraxial region is R3, and the central curvature radius of the image side surface of the second lens L2 at the paraxial region is R4, and the following relationship is met: -14.41≤(R3+R4) / (R3-R4)≤-2.69, which defines the shape of the second lens L2. When within the range, it is beneficial to correct on-axis chromatic aberration and other problems with the development of ultra-thin wide-angle. Preferably, -9.01≤(R3+R4) / (R3-R4)≤-3.37 is met.

[0079] The on-axis thickness d3 of the second lens L2 and the total optical length TTL of the camera optical lens meet the following relationship: 0.04≤d3 / TTL≤0.15, which is beneficial to miniaturization within the conditional range. Preferably, 0.06≤d3 / TTL≤0.12 is met.

[0080] The object side surface of the third lens L3 is convex at the paraxial region, the image side surface is convex at the paraxial region, and the third lens L3 has a positive refractive power. The object side surface and the image side surface of the third lens L3 can also be provided with other concave and convex distribution conditions.

[0081] The focal length of the third lens L3 is f3, and the following relationship is met: 0.58≤f3 / f≤2.02, which makes the system have better imaging quality and lower sensitivity by reasonable distribution of optical power. Preferably, 0.92≤f3 / f≤1.61 is met.

[0082] The central radius of curvature of the object side surface of the third lens L3 at the paraxial region is R5, the central radius of curvature of the image side surface of the third lens L3 at the paraxial region is R6, and the following relationship is satisfied: -0.19≤(R5+R6) / (R5-R6)≤0.29. Within the conditional range, the shape of the third lens L3 can be effectively controlled, which is beneficial to the molding of the third lens L3 and avoids the generation of stress and poor molding due to excessive surface curvature of the third lens L3. Preferably, -0.12≤(R5+R6) / (R5-R6)≤0.23 is satisfied.

[0083] The on-axis thickness d5 of the third lens L3 satisfies the following relationship: 0.06≤d5 / TTL≤0.19. Within the conditional range, miniaturization is facilitated. Preferably, 0.09≤d5 / TTL≤0.15 is satisfied.

[0084] The object side surface of the fourth lens L4 at the paraxial region is a convex surface, and the image side surface at the paraxial region is a concave surface. The fourth lens L4 has a negative refractive power. The object side surface of the fourth lens L4 can also be provided in other concave or convex distribution.

[0085] The focal length f4 of the fourth lens L4 and the focal length f of the imaging optical lens satisfy the following relationship: -9.04≤f4 / f≤-2.14. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -5.65≤f4 / f≤-2.67 is satisfied.

[0086] The central radius of curvature of the image side surface of the fourth lens L4 at the paraxial region is R8, and the following relationship is satisfied: 0.89≤(R7+R8) / (R7-R8)≤4.97. The shape of the fourth lens L4 is specified, and within the conditional range, it is beneficial to correct the aberration of the off-axis angle of view and other problems with the development of ultra-thin wide-angle. Preferably, 1.42≤(R7+R8) / (R7-R8)≤3.97 is satisfied.

[0087] The on-axis thickness d7 of the fourth lens L4 satisfies the following relationship: 0.03≤d7 / TTL≤0.10. Within the conditional range, miniaturization is facilitated. Preferably, 0.04≤d7 / TTL≤0.08 is satisfied.

[0088] The object side surface of the fifth lens L5 at the paraxial region is a concave surface, and the image side surface at the paraxial region is a convex surface. The fifth lens L5 has a positive refractive power. The object side surface and the image side surface of the fifth lens L5 can also be provided in other concave or convex distribution.

[0089] The focal length of the fifth lens L5 is f5, and the following relationship is satisfied: 0.33≤f5 / f≤1.28. By limiting the fifth lens L5, the ray angle of the camera optical lens can be effectively flattened, and the tolerance sensitivity can be reduced. Preferably, 0.53≤f5 / f≤1.02 is satisfied.

[0090] The central curvature radius of the object side surface of the fifth lens L5 at the paraxial region is R9, and the central curvature radius of the image side surface of the fifth lens L5 at the paraxial region is R10, and the following relationship is satisfied: 0.64≤(R9+R10) / (R9-R10)≤2.00. The shape of the fifth lens L5 is specified, and within the conditional range, as the ultra-thin wide-angle development progresses, the aberration of the off-axis angle and other problems can be corrected. Preferably, 1.02≤(R9+R10) / (R9-R10)≤1.60 is satisfied.

[0091] The on-axis thickness of the fifth lens L5 is d9, and the following relationship is satisfied: 0.09≤d9 / TTL≤0.31. Within the conditional range, miniaturization can be achieved. Preferably, 0.15≤d9 / TTL≤0.25 is satisfied.

[0092] The focal length of the sixth lens L6 is f6, and the following relationship is satisfied: -2.56≤f6 / f≤-0.62. By reasonably distributing the optical power, the system has better imaging quality and lower sensitivity. Preferably, -1.60≤f6 / f≤-0.78 is satisfied.

[0093] The central curvature radius of the object side surface of the sixth lens L6 at the paraxial region is R11, and the central curvature radius of the image side surface of the sixth lens L6 at the paraxial region is R12, and the following relationship is satisfied: 1.12≤(R11+R12) / (R11-R12)≤3.85. The shape of the sixth lens L6 is specified, and within the conditional range, as the ultra-thin wide-angle development progresses, the aberration of the off-axis angle and other problems can be corrected. Preferably, 1.80≤(R11+R12) / (R11-R12)≤3.08 is satisfied.

[0094] The on-axis thickness of the sixth lens L6 is d11, and the following relationship is satisfied: 0.04≤d11 / TTL≤0.13. Within the conditional range, miniaturization can be achieved. Preferably, 0.06≤d11 / TTL≤0.10 is satisfied.

[0095] The aperture value FNO of the camera optical lens is less than or equal to 1.91, so that a large aperture is achieved, and the camera optical lens has good imaging performance.

[0096] The camera optical lens of the present application will be described below with examples. The symbols recorded in each example are as follows. The units of focal length, on-axis distance, central curvature radius, and on-axis thickness are mm.

[0097] TTL: total optical length (axial distance from object side surface of first lens L1 to image surface Si), unit: mm;

[0098] F-number FNO: refers to the ratio of effective focal length of the photographing optical lens to entrance pupil diameter.

[0099] Next, the technical solutions of the present application are specifically described in four embodiments and one comparative embodiment.

[0100] (First embodiment)

[0101] Table 1 and Table 2 show the design data of the photographing optical lens 10 of the first embodiment of the present application.

[0102]

Table 1

[0103] Wherein, the meanings of each symbol are as follows.

[0104] S1: aperture;

[0105] R: radius of curvature at the center of the optical surface;

[0106] R1: central radius of curvature of the object side surface of the first lens L1 at the paraxial region;

[0107] R2: central radius of curvature of the image side surface of the first lens L1 at the paraxial region;

[0108] R3: central radius of curvature of the object side surface of the second lens L2 at the paraxial region;

[0109] R4: central radius of curvature of the image side surface of the second lens L2 at the paraxial region;

[0110] R5: central radius of curvature of the object side surface of the third lens L3 at the paraxial region;

[0111] R6: central radius of curvature of the image side surface of the third lens L3 at the paraxial region;

[0112] R7: central radius of curvature of the object side surface of the fourth lens L4 at the paraxial region;

[0113] R8: central radius of curvature of the image side surface of the fourth lens L4 at the paraxial region;

[0114] R9: central radius of curvature of the object side surface of the fifth lens L5 at the paraxial region;

[0115] R10: central radius of curvature of the image side surface of the fifth lens L5 at the paraxial region;

[0116] R11: central radius of curvature of the object side surface of the sixth lens L6 at the paraxial region;

[0117] R12: central radius of curvature of the image-side surface of the sixth lens L6 at the paraxial region;

[0118] R13: central radius of curvature of the object-side surface of the optical filter GF at the paraxial region;

[0119] R14: central radius of curvature of the image-side surface of the optical filter GF at the paraxial region;

[0120] d: on-axis thickness of a lens, on-axis distance between lenses;

[0121] d0: on-axis distance from the stop S1 to the object-side surface of the first lens L1;

[0122] d1: on-axis thickness of the first lens L1;

[0123] d2: on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

[0124] d3: on-axis thickness of the second lens L2;

[0125] d4: on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0126] d5: on-axis thickness of the third lens L3;

[0127] d6: on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

[0128] d7: on-axis thickness of the fourth lens L4;

[0129] d8: on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0130] d9: on-axis thickness of the fifth lens L5;

[0131] d10: on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0132] d11: on-axis thickness of the sixth lens L6;

[0133] d12: on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the optical filter GF;

[0134] d13: on-axis thickness of the optical filter GF;

[0135] d14: on-axis distance from the image-side surface of the optical filter GF to the image plane Si;

[0136] nd: refractive index at the d line (the d line is green light having a wavelength of 550 nm);

[0137] nd1: refractive index of d-line of the first lens L1;

[0138] nd2: refractive index of d-line of the second lens L2;

[0139] nd3: refractive index of d-line of the third lens L3;

[0140] nd4: refractive index of d-line of the fourth lens L4;

[0141] nd5: refractive index of d-line of the fifth lens L5;

[0142] nd6: refractive index of d-line of the sixth lens L6;

[0143] ndg: refractive index of d-line of the optical filter GF;

[0144] vd: Abbe number;

[0145] v1: Abbe number of the first lens L1;

[0146] v2: Abbe number of the second lens L2;

[0147] v3: Abbe number of the third lens L3;

[0148] v4: Abbe number of the fourth lens L4;

[0149] v5: Abbe number of the fifth lens L5;

[0150] v6: Abbe number of the sixth lens L6;

[0151] vg: Abbe number of the optical filter GF.

[0152] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.

[0153]

Table 2

[0154] For convenience, the aspherical surface of each lens surface uses the aspherical surface 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 16r16 + A18r 18 + A20r 20 + A22r 22 + A24r 24 + A26r 26 + A28r 28 + A30r 30 (1)

[0155] wherein k is a conic constant, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspherical coefficients, c is a curvature at the center of the optical surface, r is a perpendicular distance of a point on the aspherical curve from the optical axis, and z is an aspherical depth (a perpendicular distance between a point on the aspherical curve at a distance r from the optical axis and a tangent plane at the vertex of the aspherical surface).

[0156] Fig. 2, Fig. 3 respectively show axial aberration and lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the camera optical lens 10 of the first embodiment. Fig. 4 shows field curvature and distortion of light with a wavelength of 555 nm after passing through the camera optical lens 10 of the first embodiment, wherein the field curvature S of Fig. 4 is the sagittal field curvature, and T is the tangential field curvature.

[0157] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 1.165 mm, the full field (1.0 field) image height IH is 3.530 mm, and the full field (1.0 field) FOV in diagonal direction is 120.61°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin, and the on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.

[0158] It can be understood that the 1.0 field image height refers to half of the diagonal length of the effective pixel region of the sensor, and the 1.0 field FOV in diagonal direction refers to the field angle corresponding to the effective pixel region of the sensor.

[0159] (Second Embodiment)

[0160] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0161] Fig. 5 shows the camera optical lens 20 of the second embodiment of the present application.

[0162] Table 3, Table 4 show the design data of the camera optical lens 20 of the second embodiment of the present application.

[0163]

Table 3

[0164] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 of the second embodiment of the present application.

[0165]

Table 4

[0166] Fig. 6, Fig. 7 respectively show axial aberration and relative color aberration diagrams of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 20 of the second embodiment. Fig. 8 shows field curvature and distortion diagrams of light with a wavelength of 555 nm after passing through the imaging optical lens 20 of the second embodiment. The field curvature S of Fig. 8 is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0167] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 1.118 mm, the full field (1.0 field) image height IH is 3.900 mm, the full field (1.0 field) angle of view FOV in diagonal direction is 122.58°, the imaging optical lens 20 meets the design requirements of large aperture, wide angle, ultra-thin, the on-axis and off-axis color aberrations are fully corrected, and has excellent optical characteristics.

[0168] (Third Embodiment)

[0169] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0170] Fig. 9 shows the imaging optical lens 30 of the third embodiment of the present application.

[0171] Table 5, Table 6 show the design data of the imaging optical lens 30 of the third embodiment of the present application.

[0172]

Table 5

[0173] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 of the third embodiment of the present application.

[0174]

Table 6

[0175] Fig. 10, Fig. 11 respectively show axial aberration and relative color aberration diagrams of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 30 of the third embodiment. Fig. 12 shows field curvature and distortion diagrams of light with a wavelength of 555 nm after passing through the imaging 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.

[0176] In the embodiment, the entrance pupil diameter ENPD of the photographing optical lens 30 is 1.218 mm, the full field (1.0 field) image height IH is 3.518 mm, the full field (1.0 field) diagonal direction field of view FOV is 118.40°, the photographing optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thin, the on-axis and off-axis chromatic aberrations are fully corrected, and the photographing optical lens 30 has excellent optical characteristics.

[0177] (Fourth Embodiment)

[0178] The symbol meanings of the fourth embodiment are the same as those of the first embodiment.

[0179] FIG. 13 shows a photographing optical lens 40 of the fourth embodiment of the present application.

[0180] Tables 7 and 8 show the design data of the photographing optical lens 40 of the fourth embodiment of the present application.

[0181] [Table 7]

[0182] Table 8 shows the aspheric surface data of each lens in the photographing optical lens 40 of the fourth embodiment of the present application.

[0183] [Table 8]

[0184] FIGS. 14 and 15 respectively show the axial aberration and the magnification chromatic aberration diagrams of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through the photographing optical lens 40 of the fourth embodiment. FIG. 16 shows the field curvature and distortion diagrams of light with a wavelength of 555 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.

[0185] In the embodiment, the entrance pupil diameter ENPD of the photographing optical lens 40 is 1.483 mm, the full field (1.0 field) image height IH is 3.510 mm, the full field (1.0 field) diagonal direction field of view FOV is 108.04°, the photographing optical lens 40 meets the design requirements of large aperture, wide angle, and ultra-thin, the on-axis and off-axis chromatic aberrations are fully corrected, and the photographing optical lens 40 has excellent optical characteristics.

[0186] (Comparative Embodiment)

[0187] The symbol meanings of the comparative embodiment are the same as those of the first embodiment.

[0188] Fig. 17 shows a photographing optical lens 50 of a comparative embodiment of the present application.

[0189] Table 9 and Table 10 show the design data of the photographing optical lens 50 of the comparative embodiment of the present application.

[0190]

Table 9

[0191] Table 10 shows the aspheric surface data of each lens in the photographing optical lens 50 of the comparative embodiment of the present application.

[0192]

Table 10

[0193] Fig. 18 and Fig. 19 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the photographing optical lens 50 of the comparative embodiment. Fig. 20 shows the field curvature and the distortion of light with a wavelength of 555 nm after passing through the photographing optical lens 50 of the comparative embodiment. The field curvature S of Fig. 20 is the sagittal field curvature, and the field curvature T is the tangential field curvature.

[0194] The following Table 11 lists the numerical values corresponding to each condition formula in the comparative embodiment according to the above condition formulas. Obviously, the photographing optical lens 50 of the comparative embodiment does not satisfy the condition formula 7.00≤(f2-f4) / f≤10.00.

[0195] In the comparative embodiment, the entrance pupil diameter ENPD of the photographing optical lens 50 is 1.242 mm, the full field (1.0 field) image height IH is 3.356 mm, and the full field (1.0 field) angle of view FOV in the diagonal direction is 117.37°. The photographing optical lens 50 of the comparative embodiment does not satisfy the design requirements of large aperture, wide angle and ultra-thin, and the on-axis and off-axis chromatic aberrations are not fully corrected, and the photographing optical lens 50 does not have excellent optical characteristics.

[0196]

Table 11

[0197] It is to be understood by those skilled in the art that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A camera optical lens characterized in that, The camera optical lens comprises six lenses in sequence from the object side to the image side: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power. Wherein, the focal length of the camera optical lens is f, the focal length of the second lens is f2, the focal length of the fourth lens is f4, the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, 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 central curvature radius of the object side surface of the first lens at the near axis is R1, the central curvature radius of the image side surface of the first lens at the near axis is R2, the central curvature radius of the image side surface of the third lens at the near axis is R6, the central curvature radius of the object side surface of the fourth lens at the near axis is R7, and the following relationships are satisfied: 7.00≤(f2-f4) / f≤10.00; 2.50≤(d1+d3) / d2≤4.50; -0.70≤R1 / R2≤-0.20; -5.00≤R7 / R6≤-1.

50.

2. The camera optical lens according to claim 1, wherein, The on-axis distance between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens is SAG52, the effective radius of the image side surface of the fifth lens is SD52, and the following relationship is satisfied: 0.45≤|SAG52 / SD52|≤0.

70.

3. The camera optical lens according to claim 1, wherein, The field angle of the camera optical lens at 1.0 field of view is FOV, the image height of the camera optical lens at 1.0 field of view is IH, and the following relationship is satisfied: 65.00≤FOV*f / IH≤85.

00.

4. The camera optical lens according to claim 1, characterized in that, The object side surface of the first lens is concave at the near axis, and the image side surface of the first lens is concave at the near axis; The focal length of the first lens is f1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -3.77≤f1 / f≤-1.05; -1.33≤(R1+R2) / (R1-R2)≤-0.17; 0.03≤d1 / TTL≤0.

14.

5. The camera optical lens according to claim 1, wherein, The object side surface of the second lens is convex at the near axis, and the image side surface of the second lens is concave at the near axis; The central curvature radius of the object side surface of the second lens at the near axis is R3, the central curvature radius of the image side surface of the second lens at the near axis is R4, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 1.90≤f2 / f≤9.81; -14.41≤(R3+R4) / (R3-R4)≤-2.69; 0.04≤d3 / TTL≤0.

15.

6. The camera optical lens according to claim 1, characterized in that, The object side surface of the third lens is convex at the near axis, and the image side surface of the third lens is convex at the near axis; The focal length of the third lens is f3, the central curvature radius of the object side surface of the third lens at the near axis is R5, the on-axis thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.58≤f3 / f≤2.02; -0.19≤(R5+R6) / (R5-R6)≤0.29; 0.06≤d5 / TTL≤0.

19.

7. The camera optical lens according to claim 1, wherein, the object side surface of the fourth lens is convex at the paraxial region, and the image side surface of the fourth lens is concave at the paraxial region; the central radius of curvature of the image side surface of the fourth lens at the paraxial region is R8, the on-axis thickness of the fourth lens is d7, the total track length of the camera optical lens is TTL, and the following relationship is met: -9.04≤f4 / f≤-2.14; 0.89≤(R7+R8) / (R7-R8)≤4.97; 0.03≤d7 / TTL≤0.

10.

8. The camera optical lens according to claim 1, characterized in that, the object side surface of the fifth lens is concave at the paraxial region; and the image side surface of the fifth lens is convex at the paraxial region; the focal length of the fifth lens is f5, the central radius of curvature of the object side surface of the fifth lens at the paraxial region is R9, the central radius of curvature of the image side surface of the fifth lens at the paraxial region is R10, the on-axis thickness of the fifth lens is d9, the total track length of the camera optical lens is TTL, and the following relationship is met: 0.33≤f5 / f≤1.28; 0.64≤(R9+R10) / (R9-R10)≤2.00; 0.09≤d9 / TTL≤0.

31.

9. The camera optical lens according to claim 1, characterized in that, the object side surface of the sixth lens is convex at the paraxial region; and the image side surface of the sixth lens is concave at the paraxial region; the focal length of the sixth lens is f6, the central radius of curvature of the object side surface of the sixth lens at the paraxial region is R11, the central radius of curvature of the image side surface of the sixth lens at the paraxial region is R12, the on-axis thickness of the sixth lens is d11, the total track length of the camera optical lens is TTL, and the following relationship is met: -2.56≤f6 / f≤-0.62; 1.12≤(R11+R12) / (R11-R12)≤3.85; 0.04≤d11 / TTL≤0.

13.

10. The camera optical lens according to claim 1, characterized in that, the aperture value of the camera optical lens is FNO, and the following relationship is met: FNO≤1.91.

Images