Camera optical lens

Abstract

The present invention relates to the field of optical lenses. Disclosed is a camera optical lens, comprising a total of seven lenses which are arranged in sequence from an object side to an image side: a first lens with a positive refractive power, a second lens with a negative refractive power, a third lens with a negative refractive power, a fourth lens with a positive refractive power, a fifth lens with a negative refractive power, a sixth lens with a positive refractive power, and a seventh lens with a negative refractive power, satisfying -18.000≤f1 / f+f2 / f+f3 / f≤-8.000; -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600; -0.080≤d0 / d1≤-0.050.

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 smart devices, the demand for small-sized camera optical lenses is increasing, and due to the reduction in the pixel size of photosensitive devices, in addition to the current trend of electronic products being light and thin, the small-sized camera optical lenses with good imaging quality have become the mainstream in the market. In order to obtain better imaging quality, multi-piece lens structures are 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, seven-piece lens structures gradually appear in lens design. There is an urgent need for optical camera lenses with excellent optical performance, small size, wide angle and fully corrected aberrations.

[0003] SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a camera optical lens which has excellent optical performance while meeting the design requirements of small size, wide angle and fully corrected aberrations.

[0005] To achieve the above purpose, the technical scheme of the present application provides a camera optical lens, which comprises an aperture stop and seven lenses, the seven lenses are sequentially arranged from the object side to the image side as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power.

[0006] The object side surface of the first lens is convex at the near-axis, and the image side surface is concave at the near-axis; the object side surface of the second lens is convex at the near-axis, and the image side surface is concave at the near-axis; the object side surface of the third lens is concave at the near-axis, and the image side surface is concave at the near-axis; the object side surface of the fourth lens is convex at the near-axis; the object side surface of the fifth lens is convex at the near-axis, and the image side surface is concave at the near-axis; the object side surface of the sixth lens is convex at the near-axis, and the image side surface is convex at the near-axis; the object side surface of the seventh lens is convex at the near-axis, and the image side surface is concave at the near-axis.

[0007] Wherein, the focal length of the camera optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the on-axis distance from the aperture stop to the object side of the first lens is d0, the on-axis thickness of the first lens is d1, the central curvature radius of the object side of the fifth lens at the paraxial region is R9, the central curvature radius of the image side of the fifth lens at the paraxial region is R10, the central curvature radius of the image side of the sixth lens at the paraxial region is R12, the central curvature radius of the object side of the seventh lens at the paraxial region is R13, the central curvature radius of the image side of the seventh lens at the paraxial region is R14, and the following relationships are satisfied: -18.000≤f1 / f+f2 / f+f3 / f≤-8.000; -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600; -0.080≤d0 / d1≤-0.050; -8.000≤R12 / f6≤-2.500; -1.000≤f4 / f5≤-0.500; 1.700≤(R9+R10) / f≤2.600; 2.000≤R13 / R14≤6.000.

[0008] Preferably, the following relationship is satisfied: -15.000≤f1 / f+f2 / f+f3 / f≤-9.000.

[0009] Preferably, the following relationship is satisfied: -1.500≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.700.

[0010] Preferably, the on-axis distance between the image side of the fourth lens and the object side of the fifth lens is d8, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.065≤d8 / TTL≤0.120.

[0011] Preferably, the first lens is made of glass.

[0012] To achieve the above object, the technical scheme of the present application further provides a camera optical lens, which comprises an aperture stop and seven lenses, the seven lenses are in order from the object side to the image side as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power.

[0013] 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 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 object side surface of the third lens is concave at the paraxial region, the image side surface of the third lens is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, the image side surface of the fifth lens is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, the image side surface of the sixth lens is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, the image side surface of the seventh lens is concave at the paraxial region.

[0014] Wherein, the focal length of the photographing optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the on-axis distance from the aperture stop to the object side surface of the first lens is d0, the on-axis thickness of the first lens is d1, the central curvature radius of the object side surface of the first lens at the paraxial region is R1, the central curvature radius of the image side surface of the first lens at the paraxial region is R2, the central curvature radius of the object side surface of the seventh lens at the paraxial region is R13, the central curvature radius of the image side surface of the seventh lens at the paraxial region is R14, the sum of the on-axis thicknesses of the first lens to the seventh lens is ∑d, the sum of the lengths of the air gaps on the optical axis between any two adjacent lenses among the first lens to the seventh lens is ∑D, and the following relationships are satisfied: -18.000≤f1 / f+f2 / f+f3 / f≤-8.000; -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600; -0.080≤d0 / d1≤-0.050; 2.600≤f1 / R1+f1 / R2≤4.800; 0.600≤(R13+R14) / f≤2.600; 0.600≤∑D / ∑d≤0.950.

[0015] Preferably, the following relationship is satisfied: -15.000≤f1 / f+f2 / f+f3 / f≤-9.000.

[0016] Preferably, the following relationship is satisfied: -1.500≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.700.

[0017] Preferably, the following relationship is satisfied: 3.400≤f1 / R1+f1 / R2≤4.000.

[0018] Preferably, the following relationship is satisfied: 0.700≤(R13+R14) / f≤2.200.

[0019] Preferably, the following relation is satisfied: 0.630 ≤ ∑D / ∑d ≤ 0.920.

[0020] Preferably, the combined focal length of the first lens and the second lens is f12, the central curvature radius of the second lens at the paraxial region is R4, and the following relation is satisfied: -3.000 ≤ f12 / (R1-R4) ≤ -1.300.

[0021] Preferably, the following relation is satisfied: -2.600 ≤ f12 / (R1-R4) ≤ -1.500.

[0022] Preferably, the following relation is satisfied: 0.007 ≤ d0 / (R1-R2) ≤ 0.020.

[0023] Preferably, the following relation is satisfied: 0.008 ≤ d0 / (R1-R2) ≤ 0.018.

[0024] Preferably, the first lens is made of glass.

[0025] The camera optical lens according to the present application has excellent optical performance, and has the characteristics of miniaturization, wide-angle, and sufficient correction of aberration, 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

[0026] 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.

[0027] FIG. 1 is a structural schematic diagram of a camera optical lens according to a first embodiment of the present application;

[0028] FIG. 2 is an axial aberration schematic diagram of the camera optical lens shown in FIG. 1;

[0029] FIG. 3 is a magnification chromatic aberration schematic diagram of the camera optical lens shown in FIG. 1;

[0030] FIG. 4 is a field curvature and distortion schematic diagram of the camera optical lens shown in FIG. 1;

[0031] FIG. 5 is a structural schematic diagram of a camera optical lens according to a second embodiment of the present application;

[0032] FIG. 6 is an axial aberration schematic diagram of the camera optical lens shown in FIG. 5;

[0033] Fig. 7 is a schematic diagram of the magnification chromatic aberration of the photographing optical lens shown in Fig. 5;

[0034] Fig. 8 is a schematic diagram of the field curvature and distortion of the photographing optical lens shown in Fig. 5;

[0035] Fig. 9 is a schematic diagram of the structure of a photographing optical lens according to a third embodiment of the present application;

[0036] Fig. 10 is a schematic diagram of the axial aberration of the photographing optical lens shown in Fig. 9;

[0037] Fig. 11 is a schematic diagram of the magnification chromatic aberration of the photographing optical lens shown in Fig. 9;

[0038] Fig. 12 is a schematic diagram of the field curvature and distortion of the photographing optical lens shown in Fig. 9;

[0039] Fig. 13 is a schematic diagram of the structure of a photographing optical lens according to a fourth embodiment of the present application;

[0040] Fig. 14 is a schematic diagram of the axial aberration of the photographing optical lens shown in Fig. 13;

[0041] Fig. 15 is a schematic diagram of the magnification chromatic aberration of the photographing optical lens shown in Fig. 13;

[0042] Fig. 16 is a schematic diagram of the field curvature and distortion of the photographing optical lens shown in Fig. 13. DETAILED DESCRIPTION

[0043] 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 implemented even without these technical details and based on various changes and modifications of the following embodiments.

[0044] With reference to Figs. 1-16, the technical solutions of the present application provide a photographing optical lens 10, 20, 30, 40. Figs. 1, 5, 9, 13 show the photographing optical lens 10, 20, 30, 40 of the present application, which comprises seven lenses in total. Specifically, the photographing optical lens, in order from the object side to the image side, comprises: an aperture stop S1, a first lens L1, a second lens L2, a third lens L3, an aperture stop S1, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as a filter GF can be arranged between the seventh lens L7 and the image plane Si.

[0045] The first lens L1 is made of glass, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic. The lenses can also be made of other materials.

[0046] The object side and the image side of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are aspherical surfaces.

[0047] The refractive powers of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are positive, negative, negative, positive, negative, positive, and negative, respectively. The object side of the first lens L1 is convex at the paraxial region, and the image side is concave at the paraxial region. The object side of the second lens L2 is convex at the paraxial region, and the image side is concave at the paraxial region. The object side of the third lens L3 is concave at the paraxial region, and the image side is concave at the paraxial region. The object side of the fourth lens L4 is convex at the paraxial region, and the image side of the fourth lens L4 can be convex or concave at the paraxial region. The object side of the fifth lens L5 is convex at the paraxial region, and the image side is concave at the paraxial region. The object side of the sixth lens L6 is convex at the paraxial region, and the image side of the sixth lens L6 is convex at the paraxial region. The object side of the seventh lens L7 is convex at the paraxial region, and the image side is concave at the paraxial region.

[0048] The focal length of the imaging optical lens is defined as f, the focal length of the first lens L1 is f1, the focal length of the second lens L2 is f2, and the focal length of the third lens L3 is f3. The following relationship is satisfied: -18.000≤f1 / f+f2 / f+f3 / f≤-8.000. Within this range, by reasonably controlling the refractive power of the first three lenses, the field of view can be increased, and wide-angle can be achieved. Further, -15.000≤f1 / f+f2 / f+f3 / f≤-9.000 is satisfied.

[0049] The focal length of the fourth lens L4 is defined as f4, the focal length of the fifth lens L5 is f5, the focal length of the sixth lens L6 is f6, and the focal length of the seventh lens L7 is f7. The following relationship is satisfied: -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600. Within this range, by reasonably controlling the refractive power of the last four lenses, the aberration can be corrected, and the total optical length can be shortened. Further, -1.500≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.700 is satisfied.

[0050] The axial distance of the aperture stop S1 to the object side surface of the first lens L1 is defined as d0 (if the point on the optical axis of the object side surface of the first lens L1 is closer to the object side than the center point of the aperture stop S1, d0 is negative; if the point on the optical axis of the object side surface of the first lens L1 is closer to the image side than the center point of the aperture stop S1, d0 is positive), the axial thickness of the first lens L1 is d1, and the following relationship is satisfied: -0.080≤d0 / d1≤-0.050. Within this range, by reasonably controlling the position of the aperture stop and the axial thickness of the first lens, the imaging optical lens has a higher light intake, and at the same time, the object side surface of the first lens has a reasonable thickness, which is beneficial to improve the processing yield.

[0051] The central curvature radius of the image side surface of the sixth lens L6 at the paraxial region is defined as R12, and the focal length of the sixth lens L6 is f6, and the following relationship is satisfied: -8.000≤R12 / f6≤-2.500. Within this range, the influence of astigmatism on the imaging optical lens can be improved, thereby improving the imaging quality of the imaging optical lens.

[0052] The focal length of the fourth lens L4 is defined as f4, and the focal length of the fifth lens L5 is f5, and the following relationship is satisfied: -1.000≤f4 / f5≤-0.500. Within this range, the fifth lens can be configured with appropriate refractive power to correct the aberration generated by the fourth lens, which helps to improve the imaging quality at the periphery.

[0053] The central curvature radius of the object side surface of the fifth lens L5 at the paraxial region is defined as R9, the central curvature radius of the image side surface of the fifth lens L5 at the paraxial region is defined as R10, and the focal length of the imaging optical lens is f, and the following relationship is satisfied: 1.700≤(R9+R10) / f≤2.600. Within this range, the refractive power of the fifth lens can be conveniently adjusted, so that the fifth lens can correct the on-axis chromatic aberration and off-axis magnification chromatic aberration of light rays after passing through the fourth lens, thereby improving the imaging quality.

[0054] The central curvature radius of the object side surface of the seventh lens L7 at the paraxial region is defined as R13, and the central curvature radius of the image side surface of the seventh lens L7 at the paraxial region is defined as R14, and the following relationship is satisfied: 2.000≤R13 / R14≤6.000. By controlling the ratio of the central curvature radius of the object side surface of the seventh lens at the paraxial region to the central curvature radius of the image side surface of the seventh lens at the paraxial region, within this range, the processability of the seventh lens can be ensured, the aberration of the system is reduced, and the image quality is improved.

[0055] The axial distance of the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5 is defined as d8, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.065≤d8 / TTL≤0.120. Within this range, it is beneficial to shorten the total optical length of the imaging optical lens.

[0056] The central radius of curvature of the object side surface of the first lens L1 at the paraxial region is defined as R1, the central radius of curvature of the image side surface of the first lens L1 at the paraxial region is defined as R2, and the focal length of the first lens L1 is defined as f1. The following relationship is satisfied: 2.600≤f1 / R1+f1 / R2≤4.800. Within this range, the surface shape and refractive power of the first lens can be adjusted to help compress the volume and increase the viewing angle. Further, 3.400≤f1 / R1+f1 / R2≤4.000 is satisfied.

[0057] The central radius of curvature of the object side surface of the seventh lens L7 at the paraxial region is defined as R13, the central radius of curvature of the image side surface of the seventh lens L7 at the paraxial region is defined as R14, and the focal length of the imaging optical lens is defined as f. The following relationship is satisfied: 0.600≤(R13+R14) / f≤2.600. Within this range, the relationship between the central radius of curvature of the seventh lens at the paraxial region and the focal length is reasonably controlled, which is beneficial to the seventh lens to better correct aberration and improve the imaging quality of the imaging optical lens. Further, 0.700≤(R13+R14) / f≤2.200 is satisfied.

[0058] The sum of the thicknesses of the first lens L1 to the seventh lens L7 along the optical axis is defined as ∑d, and the sum of the lengths of the air gaps between any two adjacent lenses among the first lens L1 to the seventh lens L7 along the optical axis is defined as ∑D. The following relationship is satisfied: 0.600≤∑D / ∑d≤0.950. Within this range, the air gaps between the lenses and the thicknesses of the lenses are reasonably controlled, which is beneficial to shorten the total optical length and achieve ultra-thin. Further, 0.630≤∑D / ∑d≤0.920 is satisfied.

[0059] The combined focal length of the first lens L1 and the second lens L2 is defined as f12, and the central radius of curvature of the image side surface of the second lens L2 at the paraxial region is defined as R4. The following relationship is satisfied: -3.000≤f12 / (R1-R4)≤-1.300. Within this range, the combined focal length and surface shape of the first lens and the second lens are reasonably configured to eliminate chromatic aberration, reduce spherical aberration, correct astigmatism, and improve resolution. Further, -2.600≤f12 / (R1-R4)≤-1.500 is satisfied.

[0060] The central radius of curvature of the object side surface of the first lens L1 at the paraxial region is defined as R1, the central radius of curvature of the image side surface of the first lens L1 at the paraxial region is defined as R2, and the axial distance from the aperture stop to the object side surface of the first lens is defined as d0. The following relationship is satisfied: 0.007≤d0 / (R1-R2)≤0.020. Within this range, the aperture stop protrudes outward, and the space outside the aperture is larger, which is beneficial to the structural design of the variable aperture. Further, 0.008≤d0 / (R1-R2)≤0.018 is satisfied.

[0061] The first lens L1 is made of glass, and the glass lens and the resin lens are matched to reduce chromatic aberration and improve the performance of the optical camera lens.

[0062] Compared with the prior art, the camera optical lens provided by the application is configured as-18.000≤f1 / f+f2 / f+f3 / f≤-8.000; -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600; -0.080≤d0 / d1≤-0.050; -8.000≤R12 / f6≤-2.500; -1.000≤f4 / f5≤-0.500; 1.700≤(R9+R10) / f≤2.600; 2.000≤R13 / R14≤6.000, which is conducive to increasing the field of view, realizing wide-angle, correcting aberration, having a high light amount, and having a reasonable thickness of the first lens, thereby improving the processing yield. In addition, the influence of astigmatism on the camera optical lens is improved, thereby improving the imaging quality of the camera optical lens; the fifth lens is configured to have a suitable refractive power to correct axial chromatic aberration and off-axis magnification chromatic aberration and other aberrations, which helps to improve the imaging quality of the periphery; and the processing property of the seventh lens is ensured.

[0063] In addition, compared with the prior art, the application can also be configured as-18.000≤f1 / f+f2 / f+f3 / f≤-8.000; -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600; -0.080≤d0 / d1≤-0.050; 2.600≤f1 / R1+f1 / R2≤4.800; 0.600≤(R13+R14) / f≤2.600; 0.600≤∑D / ∑d≤0.950, which is conducive to increasing the field of view, realizing wide-angle, and meeting miniaturization, correcting aberration, and improving the imaging quality of the camera optical lens; and the camera optical lens has a high light amount, and the first lens has a reasonable thickness, which is conducive to improving the processing yield.

[0064] The camera optical lens of the application will be described below by examples. The symbols recorded in each example are as follows. The units of focal length, axial distance, central curvature radius, and axial thickness are mm.

[0065] TTL: total optical length (axial distance from the object side of the first lens L1 to the image surface Si), unit: mm;

[0066] F-number FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0067] Next, the technical solutions of the present application are specifically described in four embodiments, and the technical effects of the present application cannot be achieved when the above conditions are exceeded.

[0068] (First Embodiment)

[0069] Tables 1 and 2 show the design data of the camera optical lens 10 of the first embodiment of the present application.

[0070]

Table 1

[0071] Wherein, the meanings of each symbol are as follows.

[0072] S1: aperture stop;

[0073] R: radius of curvature at the center of the optical surface;

[0074] R1: central radius of curvature of the object side surface of the first lens L1 at the paraxial region;

[0075] R2: central radius of curvature of the image side surface of the first lens L1 at the paraxial region;

[0076] R3: central radius of curvature of the object side surface of the second lens L2 at the paraxial region;

[0077] R4: central radius of curvature of the image side surface of the second lens L2 at the paraxial region;

[0078] R5: central radius of curvature of the object side surface of the third lens L3 at the paraxial region;

[0079] R6: central radius of curvature of the image side surface of the third lens L3 at the paraxial region;

[0080] R7: central radius of curvature of the object side surface of the fourth lens L4 at the paraxial region;

[0081] R8: central radius of curvature of the image side surface of the fourth lens L4 at the paraxial region;

[0082] R9: central radius of curvature of the object side surface of the fifth lens L5 at the paraxial region;

[0083] R10: central radius of curvature of the image side surface of the fifth lens L5 at the paraxial region;

[0084] R11: central radius of curvature of the object side surface of the sixth lens L6 at the paraxial region;

[0085] R12: central radius of curvature of the image side surface of the sixth lens L6 at the paraxial region;

[0086] R13: central radius of curvature of the object side surface of the seventh lens L7 at the paraxial region;

[0087] R14: central radius of curvature of the image-side surface of the seventh lens L7 at the paraxial region;

[0088] R15: central radius of curvature of the object-side surface of the optical filter GF at the paraxial region;

[0089] R16: central radius of curvature of the image-side surface of the optical filter GF at the paraxial region;

[0090] d: on-axis thickness of a lens, on-axis distance between lenses;

[0091] d0: on-axis distance from the aperture stop S1 to the object-side surface of the first lens L1;

[0092] d1: on-axis thickness of the first lens L1;

[0093] d2: on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

[0094] d3: on-axis thickness of the second lens L2;

[0095] d4: on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0096] d5: on-axis thickness of the third lens L3;

[0097] d6: on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

[0098] d7: on-axis thickness of the fourth lens L4;

[0099] d8: on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0100] d9: on-axis thickness of the fifth lens L5;

[0101] d10: on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0102] d11: on-axis thickness of the sixth lens L6;

[0103] d12: on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0104] d13: on-axis thickness of the seventh lens L7;

[0105] d14: on-axis distance from the image-side surface of the seventh lens L7 to the object-side surface of the optical filter GF;

[0106] d15: on-axis thickness of the optical filter GF;

[0107] d16: axial distance from the image-side surface of the optical filter GF to the image plane Si

[0108] nd: refractive index of the d-line (the green light having a wavelength of 550 nm)

[0109] nd1: refractive index of the d-line of the first lens L1

[0110] nd2: refractive index of the d-line of the second lens L2

[0111] nd3: refractive index of the d-line of the third lens L3

[0112] nd4: refractive index of the d-line of the fourth lens L4

[0113] nd5: refractive index of the d-line of the fifth lens L5

[0114] nd6: refractive index of the d-line of the sixth lens L6

[0115] nd7: refractive index of the d-line of the seventh lens L7

[0116] ndg: refractive index of the d-line of the optical filter GF

[0117] vd: Abbe number

[0118] v1: Abbe number of the first lens L1

[0119] v2: Abbe number of the second lens L2

[0120] v3: Abbe number of the third lens L3

[0121] v4: Abbe number of the fourth lens L4

[0122] v5: Abbe number of the fifth lens L5

[0123] v6: Abbe number of the sixth lens L6

[0124] v7: Abbe number of the seventh lens L7

[0125] vg: Abbe number of the optical filter GF

[0126] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.

[0127] [Table 2]

[0128] 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).2 ) + A4r + A6r2+ A8r3+ A10r4+ A12r5+ A14r6+ A16r7+ A18r8+ A20r9+ A22r10+ A24r11+ A26r12+ A28r13+ A30r14(1) 2 r 2 ) 1 / 2} + A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A 16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0129] wherein, 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 surface at a distance r from the optical axis and a tangent plane tangent to the vertex on the optical axis of the aspherical surface).

[0130] Fig. 2, Fig. 3 respectively show axial aberration and lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 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 546 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.

[0131] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 4.614 mm, the 1.0 field image height IH is 7.900 mm, the MIC field image height is 8.100 mm, the FOV in the 1.0 field diagonal direction is 86.60°, the FOV in the MIC field diagonal direction is 88.18°, the camera optical lens 10 meets the design requirements of miniaturization, wide-angle and sufficient correction of aberration, and has excellent optical characteristics.

[0132] It can be understood that the 1.0 field height of view refers to half of the diagonal length of the effective pixel area of the sensor; the MIC field height of view refers to the field height of view which is extended outwardly than the 1.0 field height of view for preventing assembly deviation; the 1.0 field of view in the diagonal direction refers to the field angle corresponding to the effective pixel area of the sensor; and the MIC field of view in the diagonal direction refers to the field angle corresponding to the MIC field height of view.

[0133] (Second Embodiment)

[0134] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0135] Fig. 5 shows the imaging optical lens 20 of the second embodiment of the present application.

[0136] Tables 3 and 4 show the design data of the imaging optical lens 20 of the second embodiment of the present application.

[0137]

Table 3

[0138] Table 4 shows the aspheric surface data of each lens in the imaging optical lens 20 of the second embodiment of the present application.

[0139]

Table 4

[0140] Figs. 6 and 7 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 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 546 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.

[0141] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 4.679 mm, the 1.0 field height of view IH is 7.899 mm, the MIC field height of view is 8.100 mm, the 1.0 field of view in the diagonal direction is 86.90°, and the MIC field of view in the diagonal direction is 88.42°. The imaging optical lens 20 meets the design requirements of miniaturization, wide-angle and sufficient correction of aberration, and has excellent optical characteristics.

[0142] (Third Embodiment)

[0143] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0144] Fig. 9 shows the imaging optical lens 30 of the third embodiment of the present application.

[0145] Table 5, Table 6 show the design data of the imaging optical lens 30 of the third embodiment of the present application.

[0146] [Table 5]

[0147] Table 6 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present application.

[0148] [Table 6]

[0149] Fig. 10, Fig. 11 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 30 of the third embodiment. Fig. 12 shows the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment. The field curvature S of Fig. 12 is the sagittal field curvature, and T is the tangential field curvature.

[0150] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 4.885 mm, the 1.0 field image height IH is 7.915 mm, the MIC field image height is 8.100 mm, the FOV in the 1.0 field diagonal direction is 84.78°, and the FOV in the MIC field diagonal direction is 86.34°. The imaging optical lens 30 meets the design requirements of miniaturization, wide-angle and sufficient correction of aberration, and has excellent optical characteristics.

[0151] (Fourth Embodiment)

[0152] The symbol meanings of the fourth embodiment are the same as those of the first embodiment.

[0153] Table 7, Table 8 show the design data of the imaging optical lens 40 of the fourth embodiment of the present application.

[0154] [Table 7]

[0155] Table 8 shows the aspheric surface data of each lens in the imaging optical lens 40 of the fourth embodiment of the present application.

[0156] [Table 8]

[0157] Fig. 14, Fig. 15 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the camera optical lens 40 of the fourth embodiment. Fig. 16 shows the field curvature and distortion of light with a wavelength of 546 nm after passing through the camera optical lens 40 of the fourth embodiment, wherein 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 camera optical lens 40 is 4.868 mm, the 1.0 field image height IH is 8.000 mm, the MIC field image height is 8.290 mm, the FOV in the 1.0 field diagonal direction is 84.97°, the FOV in the MIC field diagonal direction is 87.18°, the camera optical lens 40 meets the design requirements of miniaturization, wide-angle and sufficient correction of aberration, and has excellent optical characteristics.

[0159] The later appearing Table 9 shows the values corresponding to the parameters specified in the various numerical and conditional expressions in the first, second, third and fourth embodiments.

[0160]

Table 9

[0161] 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 an aperture stop and seven lenses, which are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The object side surface of the first lens is convex at the near-axial portion, and the image side surface is concave at the near-axial portion; the object side surface of the second lens is convex at the near-axial portion, and the image side surface is concave at the near-axial portion; the object side surface of the third lens is concave at the near-axial portion, and the image side surface is concave at the near-axial portion; the object side surface of the fourth lens is convex at the near-axial portion; the object side surface of the fifth lens is convex at the near-axial portion, and the image side surface is concave at the near-axial portion; the object side surface of the sixth lens is convex at the near-axial portion, and the image side surface is convex at the near-axial portion; and the object side surface of the seventh lens is convex at the near-axial portion, and the image side surface is concave at the near-axial portion. Wherein, the focal length of the camera optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the on-axis distance from the aperture stop to the object side surface of the first lens is d0, the on-axis thickness of the first lens is d1, the central curvature radius of the object side surface of the fifth lens at the near-axial portion is R9, the central curvature radius of the image side surface of the fifth lens at the near-axial portion is R10, the central curvature radius of the image side surface of the sixth lens at the near-axial portion is R12, the central curvature radius of the object side surface of the seventh lens at the near-axial portion is R13, the central curvature radius of the image side surface of the seventh lens at the near-axial portion is R14, and the following relationships are satisfied: -18.000≤f1 / f+f2 / f+f3 / f≤-8.000; -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600; -0.080≤d0 / d1≤-0.050; -8.000≤R12 / f6≤-2.500; -1.000≤f4 / f5≤-0.500; 1.700≤(R9+R10) / f≤2.600; 2.000≤R13 / R14≤6.

000.

2. The camera optical lens according to claim 1, wherein, The following relationship is satisfied: -15.000≤f1 / f+f2 / f+f3 / f≤-9.

000.

3. The camera optical lens according to claim 1, wherein, The following relationship is satisfied: -1.500≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.

700.

4. The camera optical lens according to claim 1, characterized in that, The on-axis distance between the image side surface of the fourth lens and the object side surface of the fifth lens is d8, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.065≤d8 / TTL≤0.

120.

5. The camera optical lens according to claim 1, wherein, The first lens is made of glass.

6. A camera optical lens characterized in that, The camera optical lens comprises an aperture stop and seven lenses, which are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The object side surface of the first lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the second lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the third lens is concave at the near axis, and the image side surface is concave at the near axis; the object side surface of the fourth lens is convex at the near axis; the object side surface of the fifth lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the sixth lens is convex at the near axis, and the image side surface is convex at the near axis; and the object side surface of the seventh lens is convex at the near axis, and the image side surface is concave at the near axis. Wherein, the focal length of the camera optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the on-axis distance from the aperture stop to the object side surface of the first lens is d0, the on-axis thickness of the first lens is d1, 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 object side surface of the seventh lens at the near axis is R13, the central curvature radius of the image side surface of the seventh lens at the near axis is R14, the sum of the on-axis thicknesses of the first to seventh lenses is ∑d, the sum of the lengths of the air gaps between any two adjacent lenses among the first to seventh lenses on the optical axis is ∑D, and the following relationships are satisfied: -18.000≤f1 / f+f2 / f+f3 / f≤-8.000; -1.800≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.600; -0.080≤d0 / d1≤-0.050; 2.600≤f1 / R1+f1 / R2≤4.800; 0.600≤(R13+R14) / f≤2.600; 0.600≤∑D / ∑d≤0.

950.

7. The camera optical lens according to claim 6, characterized in that, The following relationship is satisfied: -15.000≤f1 / f+f2 / f+f3 / f≤-9.

000.

8. The camera optical lens according to claim 6, characterized in that, The following relationship is satisfied: -1.500≤f4 / f+f5 / f+f6 / f+f7 / f≤-0.

700.

9. The camera optical lens according to claim 6, characterized in that, The following relationship is satisfied: 3.400≤f1 / R1+f1 / R2≤4.

000.

10. The camera optical lens according to claim 6, characterized in that, The following relationship is satisfied: 0.700≤(R13+R14) / f≤2.

200.

11. The camera optical lens according to claim 6, characterized in that, The following relationship is satisfied: 0.630≤∑D / ∑d≤0.

920.

12. The camera optical lens according to claim 6, characterized in that, A combined focal length of the first lens and the second lens is f12, a central curvature radius of the second lens at a paraxial portion is R4, and the following relational expression is satisfied: -3.000 ≤ f12 / (R1-R4) ≤ -1.

300.

13. The camera optical lens according to claim 12, characterized in that, The following relational expression is satisfied: -2.600 ≤ f12 / (R1-R4) ≤ -1.

500.

14. The camera optical lens according to claim 6, characterized in that, The following relational expression is satisfied: 0.007 ≤ d0 / (R1-R2) ≤ 0.

020.

15. The camera optical lens according to claim 14, characterized in that, The following relational expression is satisfied: 0.008 ≤ d0 / (R1-R2) ≤ 0.

018.

16. The camera optical lens according to claim 6, characterized in that, The first lens is made of glass.

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