Camera lens

Abstract

The application discloses a camera optical lens, which comprises six lenses in sequence, i.e., 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. The focal length of the camera optical lens is f, the focal lengths of the second lens and the fourth lens are f2 and f4, the on-axis thicknesses of the first lens and the second lens are d1 and d3, the on-axis distance from the image side of the first lens to the object side of the second lens is d2, the central curvature radii of the object side and the image side of the first lens at the near axis are R1 and R2, the central curvature radius of the image side of the third lens at the near axis is R6, and the central curvature radius of the object side of the fourth lens at the near axis is R7. The following relationships are met: 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

TECHNICAL FIELD

[0001] The present application relates to the field of optical lens, in particular to a kind of camera optical lens suitable for smart phone, digital camera and other portable terminal device, and monitor, PC lens, vehicle-mounted lens and other camera device. BACKGROUND

[0002] In recent years, with the rise of various intelligent devices, the demand for miniaturized camera optical lens is increasing, and due to the reduction of pixel size of photosensitive devices, in addition to the development trend of electronic products with good function and light and thin portable appearance, therefore, 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 demand, under the condition of continuous reduction of pixel area of photosensitive device and continuous improvement of system imaging quality requirement, six-piece lens structure gradually appears in lens design. There is an urgent need for wide-angle camera lens with excellent optical characteristics, large aperture, wide angle, ultra-thin and fully corrected aberration. SUMMARY

[0003] In view of the above problems, the purpose of the present application is to provide a kind of camera optical lens, which has good optical performance, and meets the design requirements of full correction of aberration, large aperture, wide angle, ultra-thin.

[0004] To achieve the above purpose, the technical scheme of the present application provides a kind of camera optical lens, the camera optical lens includes six lenses, the six lenses are in order from object side to image side: the first lens with negative refractive power, the second lens with positive refractive power, the third lens with positive refractive power, the fourth lens with negative refractive power, the fifth lens with positive refractive power, the 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 of the first lens to the object side of the second lens is d2, the central curvature radius of the object side of the first lens at the near axis is R1, the central curvature radius of the image side of the first lens at the near axis is R2, the central curvature radius of the image side of the third lens at the near axis is R6, the central curvature radius of the object side of the fourth lens at the near axis is R7, and the following relationships are satisfied:

[0005] 7.00≤(f2-f4) / f≤10.00;

[0006] 2.50≤(d1+d3) / d2≤4.50;

[0007] -0.70 < R1 / R2 < -0.20;

[0008] -5.00 < R7 / R6 < -1.50.

[0009] Preferably, an on-axis distance between an intersection of an image-side surface of the fifth lens and an optical axis and a vertex of an effective radius of the image-side surface of the fifth lens is SAG52, an effective radius of the image-side surface of the fifth lens is SD52, and the following relationship is met:

[0010] 0.45 < |SAG52 / SD52| < 0.70.

[0011] Preferably, a field of view angle of the imaging optical lens at 1.0 field of view is FOV, an image height of the imaging optical lens at 1.0 field of view is IH, and the following relationship is met:

[0012] 65.00 < FOV*f / IH < 85.00.

[0013] Preferably, an object-side surface of the first lens is concave at a paraxial region, an image-side surface of the first lens is concave at a paraxial region; a focal length of the first lens is f1, an overall optical length of the imaging optical lens is TTL, and the following relationship is met:

[0014] -3.77 < f1 / f < -1.05;

[0015] -1.33 < (R1+R2) / (R1-R2) < -0.17;

[0016] 0.03 < d1 / TTL < 0.14.

[0017] Preferably, an object-side surface of the second lens is convex at a paraxial region, an image-side surface of the second lens is concave at a paraxial region; a central radius of curvature of the object-side surface of the second lens at a paraxial region is R3, a central radius of curvature of the image-side surface of the second lens at a paraxial region is R4, an overall optical length of the imaging optical lens is TTL, and the following relationship is met:

[0018] 1.90 < f2 / f < 9.81;

[0019] -14.41 < (R3+R4) / (R3-R4) < -2.69;

[0020] 0.04 < d3 / TTL < 0.15.

[0021] 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 met:

[0022] 0.58≤f3 / f≤2.02;

[0023] -0.19≤(R5+R6) / (R5-R6)≤0.29;

[0024] 0.06≤d5 / TTL≤0.19.

[0025] 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 met:

[0026] -9.04≤f4 / f≤-2.14;

[0027] 0.89≤(R7+R8) / (R7-R8)≤4.97;

[0028] 0.03≤d7 / TTL≤0.10.

[0029] 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 met:

[0030] 0.33≤f5 / f≤1.28;

[0031] 0.64≤(R9+R10) / (R9-R10)≤2.00;

[0032] 0.09≤d9 / TTL≤0.31.

[0033] 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:

[0034] -2.56≤f6 / f≤-0.62;

[0035] 1.12≤(R11+R12) / (R11-R12)≤3.85;

[0036] 0.04≤d11 / TTL≤0.13.

[0037] Preferably, the aperture value of the camera optical lens is FNO, and the following relationship is satisfied: FNO≤1.91.

[0038] 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

[0039] 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.

[0040] Figure 1 is a structural schematic diagram of a camera optical lens of a first embodiment of the present application;

[0041] Figure 2 is an axial aberration schematic diagram of the camera optical lens shown in Figure 1 ;

[0042] Figure 3 is a lateral chromatic aberration of magnification schematic diagram of the camera optical lens shown in Figure 1 ;

[0043] Figure 4 is a field curvature and distortion schematic diagram of the camera optical lens shown in Figure 1 ;

[0044] Figure 5 is a structural schematic diagram of a camera optical lens of a second embodiment of the present application;

[0045] Figure 6 is Figure 5 axial aberration diagram of the photographing optical lens shown in FIG. 1;

[0046] Figure 7 is Figure 5 lateral chromatic aberration diagram of the photographing optical lens shown in FIG. 1;

[0047] Figure 8 is Figure 5 field curvature and distortion diagram of the photographing optical lens shown in FIG. 1;

[0048] Figure 9 is a structural diagram of the photographing optical lens of the third embodiment of the present application;

[0049] Figure 10 is Figure 9 axial aberration diagram of the photographing optical lens shown in FIG. 2;

[0050] Figure 11 is Figure 9 lateral chromatic aberration diagram of the photographing optical lens shown in FIG. 2;

[0051] Figure 12 is Figure 9 field curvature and distortion diagram of the photographing optical lens shown in FIG. 2;

[0052] Figure 13 is a structural diagram of the photographing optical lens of the fourth embodiment of the present application;

[0053] Figure 14 is Figure 13 axial aberration diagram of the photographing optical lens shown in FIG. 3;

[0054] Figure 15 is Figure 13 lateral chromatic aberration diagram of the photographing optical lens shown in FIG. 3;

[0055] Figure 16 is Figure 13 field curvature and distortion diagram of the photographing optical lens shown in FIG. 3;

[0056] Figure 17 is a structural diagram of the photographing optical lens of the comparative embodiment of the present application;

[0057] Figure 18 is Figure 17 axial aberration diagram of the photographing optical lens shown in FIG. 4;

[0058] Figure 19 is Figure 17 lateral chromatic aberration diagram of the photographing optical lens shown in FIG. 4;

[0059] Figure 20 is Figure 17A field curvature and distortion diagram of the illustrated camera optical lens. DETAILED DESCRIPTION

[0060] 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 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 claimed technical solutions of the present application can be realized even without these technical details and based on various changes and modifications of the following embodiments.

[0061] Reference is made to the accompanying Figures 1-16 , the technical solutions of the present application provide a camera optical lens 10, 20, 30, 40. Figure 1 , 5 , 9, 13 are the camera optical lens 10, 20, 30, 40 of the present application, which comprises six lenses. Specifically, the camera optical lens, from the object side to the image side in order: first lens L1, second lens L2, aperture S1, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6. The sixth lens L6 and the image plane Si can be provided with optical elements such as optical filter GF.

[0062] The first lens L, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 are all of plastic material. Each lens can also be of other materials.

[0063] 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, which satisfies the following relationship: 7.00≤(f2-f4) / f≤10.00. Within the conditional formula range, by reasonably allocating the focal length of the optical system, it is beneficial to correct the astigmatism and distortion of the camera optical lens, so that the distortion |Distortion|≤10%, and the possibility of dark corner generation is reduced.

[0064] The on-axis thickness of the first lens L1 is defined as d1, the on-axis thickness of the second lens L2 is defined as d3, and the on-axis distance from the image side of the first lens L1 to the object side of the second lens L2 is defined as d2, which satisfies the following relationship: 2.50≤(d1+d3) / d2≤4.50. Within the conditional formula range, by reasonably allocating the air gap between the lenses, it is beneficial to reduce the assembly difficulty in the actual production process and improve the yield.

[0065] The central curvature radius of the object side surface of the first lens L1 at the paraxial region is defined as R1, and the central curvature radius of the image side surface of the first lens L1 at the paraxial region is defined as R2, and the following relationship is satisfied: -0.70≤R1 / R2≤-0.20. The shape of the first lens L1 is defined, and within the conditional range, the degree of deflection of light passing through the lens is moderated, and chromatic aberration is effectively corrected, so that the chromatic aberration |LC| is less than or equal to 6.0 μm.

[0066] The central curvature radius of the image side surface of the third lens L3 at the paraxial region is defined as R6, and the central curvature radius of the object side surface of the fourth lens L4 at the paraxial region is defined as R7, and the following relationship is satisfied: -5.00≤R7 / R6≤-1.50. The current state of the image side surface of the third lens L3 and the object side surface of the fourth lens L4 is defined within the conditional range, which is helpful for the smooth transition of nearby light and is conducive to improving image quality.

[0067] In the case of satisfying the above conditional formula, the imaging 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 imaging optical lens 10, 20, 30, 40, the imaging 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 imaging elements.

[0068] Based on the above conditional formula and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0069] 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, and the following relationship is satisfied: 0.45≤|SAG52 / SD52|≤0.70. Within the conditional range, the imaging optical lens has good stray light performance and is easy to process.

[0070] The field of view of the imaging optical lens at 1.0 field of view is FOV, and the image height of the imaging optical lens at 1.0 field of view is IH, and the following relationship is satisfied: 65.00≤FOV*f / IH≤85.00. Within the conditional range, it is conducive to wide-angle imaging of a larger image surface.

[0071] The object side surface of the first lens L1 at the paraxial region is concave, and the image side surface at the paraxial region is concave, and 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 in other concave and convex distribution conditions.

[0072] The focal length of the first lens L1 is f1, and the following relationship is satisfied: -3.77≤f1 / f≤-1.05, which defines the ratio of the negative refractive power of the first lens L1 to the overall focal length. When the ratio is within the defined range, the first lens has an appropriate negative refractive power, which is beneficial for reducing system aberrations and facilitating the development of the lens towards ultra-thin and wide-angle. Preferably, -2.35≤f1 / f≤-1.31 is satisfied.

[0073] 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 conditional range, 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 is satisfied.

[0074] The total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.03≤d1 / TTL≤0.14, which is beneficial for miniaturization within the conditional range. Preferably, 0.05≤d1 / TTL≤0.11 is satisfied.

[0075] The object side surface of the second lens L2 is convex at the near-axis, and the image side surface is concave at the near-axis. 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 in other concave and convex distribution conditions.

[0076] The focal length of the second lens L2 is f2, and the following relationship is satisfied: 1.90≤f2 / f≤9.81. By controlling the positive focal power of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system. Preferably, 3.04≤f2 / f≤7.85 is satisfied.

[0077] The central curvature radius of the object side surface of the second lens L2 at the near-axis is R3, and the central curvature radius of the image side surface of the second lens L2 at the near-axis is R4, and the following relationship is satisfied: -14.41≤(R3+R4) / (R3-R4)≤-2.69, which defines the shape of the second lens L2. When the range is within the range, it is beneficial to correct the on-axis chromatic aberration and other problems with the development of ultra-thin and wide-angle. Preferably, -9.01≤(R3+R4) / (R3-R4)≤-3.37 is satisfied.

[0078] The on-axis thickness d3 of the second lens L2 and the total optical length TTL of the camera optical lens satisfy the following relationship: 0.04≤d3 / TTL≤0.15, which is beneficial for miniaturization within the conditional range. Preferably, 0.06≤d3 / TTL≤0.12 is satisfied.

[0079] The object side surface of the third lens L3 is convex at the paraxial region, the image side surface of the third lens L3 is convex at the paraxial region, and the third lens L3 has 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.

[0080] The focal length of the third lens L3 is f3, and the following relationship is satisfied: 0.58≤f3 / f≤2.02. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, 0.92≤f3 / f≤1.61 is satisfied.

[0081] The central curvature radius of the object side surface of the third lens L3 at the paraxial region is R5, and the central curvature radius 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.

[0082] 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.

[0083] The object side surface of the fourth lens L4 is convex at the paraxial region, the image side surface of the fourth lens L4 is concave at the paraxial region, and the fourth lens L4 has negative refractive power. The object side surface of the fourth lens L4 can also be provided with other concave and convex distribution conditions.

[0084] 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.

[0085] The central curvature radius 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 and other problems with the development of ultra-thin wide-angle. Preferably, 1.42≤(R7+R8) / (R7-R8)≤3.97 is satisfied.

[0086] The on-axis thickness of the fourth lens L4 is d7, and the following relationship is satisfied: 0.03≤d7 / TTL≤0.10. Within the conditional range, miniaturization is facilitated. Preferably, 0.04≤d7 / TTL≤0.08 is satisfied.

[0087] The object side surface of the fifth lens L5 is concave at the paraxial region, the image side surface is convex at the paraxial region, and the fifth lens L5 has positive refractive power. The object side surface and the image side surface of the fifth lens L5 can also be provided with other concave-convex distributions.

[0088] 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 light ray angle of the imaging optical lens can be effectively flattened, and the tolerance sensitivity is reduced. Preferably, 0.53≤f5 / f≤1.02 is satisfied.

[0089] 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. Within the conditional range, as the development of ultra-thin wide-angle, it is beneficial to correct the aberration of the off-axis angle and other problems. Preferably, 1.02≤(R9+R10) / (R9-R10)≤1.60 is satisfied.

[0090] 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 is facilitated. Preferably, 0.15≤d9 / TTL≤0.25 is satisfied.

[0091] The focal length of the sixth lens L6 is f6, and the following relationship is satisfied: -2.56≤f6 / f≤-0.62. By reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -1.60≤f6 / f≤-0.78 is satisfied.

[0092] 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. Within the conditional range, as the development of ultra-thin wide-angle, it is beneficial to correct the aberration of the off-axis angle and other problems. Preferably, 1.80≤(R11+R12) / (R11-R12)≤3.08 is satisfied.

[0093] 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 is facilitated. Preferably, 0.06≤d11 / TTL≤0.10 is satisfied.

[0094] The F-number FNO of the imaging optical lens is less than or equal to 1.91, thereby achieving a large aperture and good imaging performance of the imaging optical lens.

[0095] The imaging optical lens of the present application will be described below with examples. The symbols described in each example are shown below. The units of focal length, on-axis distance, central radius of curvature, and on-axis thickness are mm.

[0096] TTL: total track length (on-axis distance from the object side surface of the first lens L1 to the image surface Si), unit: mm;

[0097] F-number FNO: refers to the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter.

[0098] Next, the technical solutions of the present application will be described in detail with four embodiments and one comparative embodiment.

[0099] (First embodiment)

[0100] Table 1 and Table 2 show the design data of the imaging optical lens 10 of the first embodiment of the present application.

[0101]

Table 1

[0102]

[0103]

[0104] The meanings of the symbols are as follows.

[0105] S1: aperture;

[0106] R: radius of curvature at the center of an optical surface;

[0107] R1: central radius of curvature of the object side surface of the first lens L1 at the paraxial region;

[0108] R2: central radius of curvature of the image side surface of the first lens L1 at the paraxial region;

[0109] R3: central radius of curvature of the object side surface of the second lens L2 at the paraxial region;

[0110] R4: central radius of curvature of the image side surface of the second lens L2 at the paraxial region;

[0111] R5: central radius of curvature of the object side surface of the third lens L3 at the paraxial region;

[0112] R6: central radius of curvature of the image-side surface of the third lens L3 at the paraxial region;

[0113] R7: central radius of curvature of the object-side surface of the fourth lens L4 at the paraxial region;

[0114] R8: central radius of curvature of the image-side surface of the fourth lens L4 at the paraxial region;

[0115] R9: central radius of curvature of the object-side surface of the fifth lens L5 at the paraxial region;

[0116] R10: central radius of curvature of the image-side surface of the fifth lens L5 at the paraxial region; 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; R13: central radius of curvature of the object-side surface of the optical filter GF at the paraxial region; R14: central radius of curvature of the image-side surface of the optical filter GF at the paraxial region;

[0118] d: on-axis thickness of a lens, on-axis distance between lenses;

[0119] d0: on-axis distance from the stop S1 to the object-side surface of the first lens L1;

[0120] d1: on-axis thickness of the first lens L1;

[0121] d2: on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

[0122] d3: on-axis thickness of the second lens L2;

[0123] d4: on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0124] d5: on-axis thickness of the third lens L3;

[0125] d6: on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

[0126] d7: on-axis thickness of the fourth lens L4;

[0127] d8: on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0128] d9: on-axis thickness of the fifth lens L5;

[0129] d10: on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0130] d11: on-axis thickness of the sixth lens L6;

[0131] d12: an on-axis distance from an image-side surface of the sixth lens L6 to an object-side surface of the optical filter GF;

[0132] d13: an on-axis thickness of the optical filter GF;

[0133] d14: an on-axis distance from an image-side surface of the optical filter GF to the image plane Si;

[0134] nd: a refractive index for a d-line (the d-line is green light having a wavelength of 550 nm);

[0135] nd1: a refractive index for a d-line of the first lens L1;

[0136] nd2: a refractive index for a d-line of the second lens L2;

[0137] nd3: a refractive index for a d-line of the third lens L3;

[0138] nd4: a refractive index for a d-line of the fourth lens L4;

[0139] nd5: a refractive index for a d-line of the fifth lens L5;

[0140] nd6: a refractive index for a d-line of the sixth lens L6;

[0141] ndg: a refractive index for a d-line of the optical filter GF;

[0142] vd: an Abbe number;

[0143] v1: an Abbe number of the first lens L1;

[0144] v2: an Abbe number of the second lens L2;

[0145] v3: an Abbe number of the third lens L3;

[0146] v4: an Abbe number of the fourth lens L4;

[0147] v5: an Abbe number of the fifth lens L5;

[0148] v6: an Abbe number of the sixth lens L6;

[0149] vg: an Abbe number of the optical filter GF.

[0150] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.

[0151]

Table 2

[0152]

[0153]

[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).

[0155] 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 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0156] where k is a conic coefficient, 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).

[0157] Figure 2 、 Figure 3 Figures showing the axial aberration and the lateral chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through the photographing optical lens 10 of the first embodiment are shown in Figs. 1A, 1B, 1C, 1D, and 1E, respectively. Figure 4 Figures showing the field curvature and the distortion of light having a wavelength of 555 nm after passing through the photographing optical lens 10 of the first embodiment are shown in Figs. 2A and 2B, respectively. Figure 4 The field curvature S is the sagittal field curvature, and T is the tangential field curvature.

[0158] In the present embodiment, the entrance pupil diameter ENPD of the photographing 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) angle of view FOV in the diagonal direction is 120.61°. The photographing optical lens 10 satisfies the design requirements of large aperture, wide angle, and ultra-thin, the on-axis and off-axis chromatic aberration is sufficiently corrected, and has excellent optical characteristics.

[0159] It can be understood that 1.0 field height refers to half of the diagonal length of the effective pixel area of the sensor; and 1.0 field diagonal direction FOV refers to the field angle corresponding to the effective pixel area of the sensor.

[0160] (Second embodiment)

[0161] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0162] Figure 5 The imaging optical lens 20 of the second embodiment of the present application is shown.

[0163] Tables 3 and 4 show the design data of the imaging optical lens 20 of the second embodiment of the present application.

[0164] [Table 3]

[0165]

[0166]

[0167] Table 4 shows the aspheric surface data of each lens in the imaging optical lens 20 of the second embodiment of the present application.

[0168] [Table 4]

[0169]

[0170]

[0171] Figure 6 、 Figure 7 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 imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 The 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 are shown. Figure 8 The field curvature S is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0172] 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, and the field angle FOV in the diagonal direction of the full field (1.0 field) is 122.58°. The imaging optical lens 20 meets the design requirements of large aperture, wide angle and ultra-thin, the on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.

[0173] (Third embodiment)

[0174] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0175] Figure 9 A photographing optical lens 30 of the third embodiment of the present application is shown.

[0176] Tables 5 and 6 show the design data of the photographing optical lens 30 of the third embodiment of the present application.

[0177]

Table 5

[0178]

[0179]

[0180] Table 6 shows the aspheric surface data of each lens in the photographing optical lens 30 of the third embodiment of the present application.

[0181]

Table 6

[0182]

[0183]

[0184] Figure 10 、 Figure 11 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 30 of the third embodiment are shown respectively. Figure 12 The field curvature and the distortion of light with a wavelength of 555 nm after passing through the photographing optical lens 30 of the third embodiment are shown. Figure 12 The field curvature S is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0185] In the present 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, and the full field (1.0 field) angle of view FOV in the diagonal direction is 118.40°. The photographing optical lens 30 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.

[0186] (Fourth Embodiment)

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

[0188] Figure 13 A photographing optical lens 40 of the fourth embodiment of the present application is shown.

[0189] Table 7, Table 8 show the design data of the imaging optical lens 40 of the fourth embodiment of the present application.

[0190] [Table 7]

[0191]

[0192]

[0193] Table 8 shows the aspheric surface data of each lens in the imaging optical lens 40 of the fourth embodiment of the present application.

[0194] [Table 8]

[0195]

[0196]

[0197] Figure 14 、 Figure 15 The axial aberration and the lateral chromatic aberration of the light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Figure 16 The field curvature and the distortion of the light with wavelength of 555 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown. Figure 16 The field curvature S is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0198] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 40 is 1.483 mm, the full field (1.0 field) image height IH is 3.510 mm, and the full field (1.0 field) angle of view FOV in the diagonal direction is 108.04°. The imaging optical lens 40 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.

[0199] (Comparative Embodiment)

[0200] The symbol meanings of the comparative embodiment are the same as those of the first embodiment.

[0201] Figure 17 The imaging optical lens 50 of the comparative embodiment of the present application is shown.

[0202] Table 9, Table 10 show the design data of the imaging optical lens 50 of the comparative embodiment of the present application.

[0203] [Table 9]

[0204]

[0205]

[0206] Table 10 shows aspherical surface data of each lens in the imaging optical lens 50 of the comparative embodiment of the present application.

[0207]

Table 10

[0208]

[0209]

[0210] Figure 18 、 Figure 19 Figures 9A, 9B, 9C, 9D and 9E respectively show axial aberration and lateral chromatic aberration diagrams of light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm after passing through the imaging optical lens 50 of the comparative embodiment. Figure 20 Figures 10A and 10B respectively show field curvature and distortion diagrams of light with a wavelength of 555nm after passing through the imaging optical lens 50 of the comparative embodiment. Figure 20 The field curvature S is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0211] Table 11 below lists the numerical values corresponding to each condition formula in the comparative embodiment according to the above condition formulas. Obviously, the imaging optical lens 50 of the comparative embodiment does not satisfy the above condition formula 7.00≤(f2-f4) / f≤10.00.

[0212] In the comparative embodiment, the entrance pupil diameter ENPD of the imaging optical lens 50 is 1.242mm, the full field (1.0 field) image height IH is 3.356mm, and the full field (1.0 field) angle of view FOV in the diagonal direction is 117.37°. The imaging 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 aberration is not fully corrected, and it does not have excellent optical characteristics.

[0213]

Table 11

[0214]

[0215]

[0216] It is 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, which are arranged in the following order 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 focal length of the sixth lens is f6, the axial thickness of the first lens is d1, the axial thickness of the second lens is d3, the axial distance from the image-side surface of the first lens to the object-side surface of the second lens is d2, the central radius of curvature of the object-side surface of the first lens at the paraxial position is R1, the central radius of curvature of the image-side surface of the first lens at the paraxial position is R2, the central radius of curvature of the image-side surface of the third lens at the paraxial position is R6, and the central radius of curvature of the object-side surface of the fourth lens at the paraxial position is R7, and the following relationship is 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; -2.56≤f6 / f≤-0.

62.

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

70.

3. The camera optical lens according to claim 1, characterized in that, The field of view (FOV) of the camera optical lens in a 1.0 field of view is IH, and the image height of the camera optical lens in a 1.0 field of view is IH, satisfying the following relationship: 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 paraxial position, and the image-side surface of the first lens is concave at the paraxial position. The focal length of the first lens is f1, and the total optical length of the imaging optical lens is TTL, and they satisfy the following relationship: -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, characterized in that, The object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position. The central radius of curvature of the object-side surface of the second lens at the paraxial position is R3, the central radius of curvature of the image-side surface of the second lens at the paraxial position is R4, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 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 paraxial position, and the image-side surface of the third lens is convex at the paraxial position. The third lens has a focal length of f3, a central radius of curvature of its object-side surface near the paraxial direction of R5, an on-axis thickness of d5, and a total optical length of TTL, satisfying the following relationship: 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, characterized in that, The object-side surface of the fourth lens is convex at the paraxial position, and the image-side surface of the fourth lens is concave at the paraxial position. The fourth lens has a central radius of curvature R8 at its paraxial side, an on-axis thickness d7, and a total optical length of TTL, satisfying the following relationship: -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 near the axis; the image-side surface of the fifth lens is convex near the axis. The fifth lens has a focal length of f5, a central radius of curvature of its object-side surface at the paraxial position of R9, a central radius of curvature of its image-side surface at the paraxial position of R10, an on-axis thickness of d9, and a total optical length of TTL, satisfying the following relationship: 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 position, and the image-side surface of the sixth lens is concave at the paraxial position. The object-side radius of curvature of the sixth lens at the paraxial position is R11, the image-side radius of curvature of the sixth lens at the paraxial position is R12, the axial thickness of the sixth lens is d11, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 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 it satisfies: FNO≤1.91.

Images