Camera optical lens

Abstract

A camera optical lens (10), comprising five lens pieces in total, the five lens pieces successively being, from an object side to an image side: a first lens piece (L1) having a negative refractive power, a second lens piece (L2) having a positive refractive power, a third lens piece (L3) having a negative refractive power, a fourth lens piece (L4) having a positive refractive power, and a fifth lens piece (L5) having a negative refractive power, and satisfying the following relational expressions: 0.70≤f2 / f≤1.10, 2.00≤(R5+R6) / (R5-R6)≤10.00, 0.70≤R1 / f1≤1.30, and 5.50≤R7 / R8≤14.00. The camera optical lens (10) can meet design requirements for a large aperture, being ultrathin and a wide angle.

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 camera devices such as monitors and PC lenses. BACKGROUND

[0002] In recent years, with the rise of various smart devices, the demand for small camera optical lenses is increasing, and due to the reduction of the pixel size of the photosensitive device, combined with the current trend of electronic products being light and thin, the small 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 the photosensitive device and the increasing requirement of the system on imaging quality, five-piece lens structure gradually appears in the lens design. There is an urgent need for a wide-angle camera lens with excellent optical characteristics, small size and fully corrected aberration.

[0003] SUMMARY

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

[0005] To achieve the above purpose, the technical scheme of the present application provides a camera optical lens, which comprises five lenses, and the five 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 negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power.

[0006] 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 central curvature radius of the object side of the first lens is R1, the central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side of the third lens is R6, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, and the following relationships are satisfied:

[0007] 0.70≤f2 / f≤1.10;

[0008] 2.00≤(R5+R6) / (R5-R6)≤10.00;

[0009] 0.70≤R1 / f1≤1.30;

[0010] 5.50 < R7 / R8 < 14.00.

[0011] Preferably, the total optical length of the photographing optical lens is TTL, and the following relationship is met: 2.00 < TTL / f < 3.00.

[0012] Preferably, the edge thickness of the fifth lens is ET5, the on-axis thickness of the fifth lens is d9, and the following relationship is met: 1.35 < ET5 / d9 < 2.00.

[0013] 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 central radius of curvature of the image side surface of the first lens is R2, the on-axis thickness of the first lens is d1, the total optical length of the photographing optical lens is TTL, and the following relationships are met:

[0014] -4.01 < f1 / f < -1.19;

[0015] -1.15 < (R1+R2) / (R1-R2) < 0.23;

[0016] 0.03 < d1 / TTL < 0.12.

[0017] Preferably, the object side surface of the second lens is convex at the paraxial region, the image side surface of the second lens is convex at the paraxial region; the central radius of curvature of the object side surface of the second lens is R3, the central radius of curvature of the image side surface of the second lens is R4, the on-axis thickness of the second lens is d3, the total optical length of the photographing optical lens is TTL, and the following relationships are met:

[0018] -0.08 < (R3+R4) / (R3-R4) < 0.17;

[0019] 0.07 < d3 / TTL < 0.28.

[0020] Preferably, the object side surface of the third lens is convex at the paraxial region, the image side surface of the third lens is concave at the paraxial region; the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, the total optical length of the photographing optical lens is TTL, and the following relationships are met:

[0021] -13.61 < f3 / f < -1.13;

[0022] 0.02 < d5 / TTL < 0.07.

[0023] Preferably, the object side surface of the fourth lens is concave at the paraxial region, the image side surface of the fourth lens is convex at the paraxial region; the focal length of the fourth lens is f4, 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:

[0024] 0.64≤f4 / f≤2.25;

[0025] 0.58≤(R7+R8) / (R7-R8)≤2.16;

[0026] 0.08≤d7 / TTL≤0.27.

[0027] Preferably, 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 focal length of the fifth lens is f5, the central radius of curvature of the object side surface of the fifth lens is R9, the central radius of curvature of the image side surface of the fifth lens is R10, the on-axis thickness of the fifth lens is d9, the total track length of the camera optical lens is TTL, and the following relationships are satisfied:

[0028] -4.29≤f5 / f≤-1.05;

[0029] 1.53≤(R9+R10) / (R9-R10)≤5.06;

[0030] 0.05≤d9 / TTL≤0.19.

[0031] Preferably, the total track length of the camera optical lens is TTL, the maximum image height of the camera optical lens is IH, and the following relationship is satisfied: TTL / IH≤1.91.

[0032] Preferably, the combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied: 0.45≤f12 / f≤2.06.

[0033] The camera optical lens according to the present application has excellent optical characteristics, and has the characteristics of large aperture, wide angle, and ultra-thin, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS, and other camera elements. BRIEF DESCRIPTION OF DRAWINGS

[0034] 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.

[0035] Fig. 1 is a schematic diagram of the structure of a camera lens according to a first embodiment of the present application;

[0036] Fig. 2 is a schematic diagram of the axial aberration of the camera lens shown in Fig. 1;

[0037] Fig. 3 is a schematic diagram of the lateral chromatic aberration of the camera lens shown in Fig. 1;

[0038] Fig. 4 is a schematic diagram of the field curvature and distortion of the camera lens shown in Fig. 1;

[0039] Fig. 5 is a schematic diagram of the structure of a camera lens according to a second embodiment of the present application;

[0040] Fig. 6 is a schematic diagram of the axial aberration of the camera lens shown in Fig. 5;

[0041] Fig. 7 is a schematic diagram of the lateral chromatic aberration of the camera lens shown in Fig. 5;

[0042] Fig. 8 is a schematic diagram of the field curvature and distortion of the camera lens shown in Fig. 5;

[0043] Fig. 9 is a schematic diagram of the structure of a camera lens according to a third embodiment of the present application;

[0044] Fig. 10 is a schematic diagram of the axial aberration of the camera lens shown in Fig. 9;

[0045] Fig. 11 is a schematic diagram of the lateral chromatic aberration of the camera lens shown in Fig. 9;

[0046] Fig. 12 is a schematic diagram of the field curvature and distortion of the camera lens shown in Fig. 9;

[0047] Fig. 13 is a schematic diagram of the structure of a camera lens according to a fourth embodiment of the present application;

[0048] Fig. 14 is a schematic diagram of the axial aberration of the camera lens shown in Fig. 13;

[0049] Fig. 15 is a schematic diagram of the lateral chromatic aberration of the camera lens shown in Fig. 13;

[0050] Fig. 16 is a schematic diagram of the field curvature and distortion of the camera lens shown in Fig. 13;

[0051] Fig. 17 is a schematic diagram of the structure of a camera lens according to a comparative embodiment;

[0052] Fig. 18 is a schematic diagram of the axial aberration of the camera lens shown in Fig. 17;

[0053] Fig. 19 is a schematic diagram of the lateral chromatic aberration of the camera lens shown in Fig. 17;

[0054] Fig. 20 is a schematic diagram of the field curvature and distortion of the camera lens shown in Fig. 17. DETAILED DESCRIPTION

[0055] In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it should be understood by those skilled in the art that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0056] With reference to the accompanying drawings, the technical solutions of the present application provide 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 five lenses. Specifically, the camera optical lens, from the object side to the image side, in order, is: a first lens L1, an aperture S1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. An optical element such as an optical filter GF can be arranged between the fifth lens L5 and the image plane Si.

[0057] The first lens L1 is made of plastic, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, and the fifth lens L5 is made of plastic. Each lens can also be made of other materials.

[0058] The first lens has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, and the fifth lens L5 has a negative refractive power. In other embodiments, each lens can also have other refractive powers.

[0059] The focal length of the camera optical lens is defined as f, and the focal length of the second lens L2 is defined as f2. The following relationship is satisfied: 0.70≤f2 / f≤1.10. This relationship specifies the ratio of the focal length f2 of the second lens L2 to the focal length f of the camera optical lens. Within the range of the relationship, the field curvature of the camera optical lens can be effectively balanced, so that the field curvature offset of the central field of view is less than 0.02 mm.

[0060] The central curvature radius of the object side of the third lens L3 is R5, and the central curvature radius of the image side of the third lens L3 is R6. The following relationship is satisfied: 2.00≤(R5+R6) / (R5-R6)≤10.00. This relationship specifies the shape of the third lens L3. Within the range of the relationship, it is beneficial to moderate the degree of deflection of light passing through the lens, and can well reduce aberrations.

[0061] The central curvature radius of the object side surface of the first lens L1 is R1, and the focal length of the first lens L1 is f1, and the following relationship is satisfied: 0.70≤R1 / f1≤1.30, which defines the surface shape of the first lens L1. Within the range of the relationship, it is beneficial to correct aberration of light during propagation, and at the same time, it is beneficial to shorten the total length of the camera optical lens.

[0062] The central curvature radius of the object side surface of the fourth lens L4 is R7, the central curvature radius of the image side surface is R8, and the following relationship is satisfied: 5.50≤R7 / R8≤14.00, which defines the shape of the fourth lens L4. Within the range of the relationship, the degree of light deviation through the lens can be moderated, and the chromatic aberration is effectively corrected, so that the chromatic aberration |LC|≤4.0 μm.

[0063] Under the condition of satisfying the above several relationships, 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 camera lenses composed of high-pixel CCD, CMOS, and other camera elements.

[0064] Based on the above relationships and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0065] The total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 2.00≤TTL / f≤3.00, which defines the telephoto ratio. By being less than the upper limit of the relationship, the optical total length can be controlled to be shorter, and miniaturization is easy to achieve. On the other hand, by being greater than the lower limit of the relationship, distortion and on-axis chromatic aberration can be easily corrected, and good optical performance can be maintained.

[0066] The edge thickness of the fifth lens L5 is ET5, and the on-axis thickness of the fifth lens L5 is d9, and the following relationship is satisfied: 1.35≤ET5 / d9≤2.00, which defines the ratio of the edge thickness and the on-axis thickness of the fifth lens L5, which is helpful for lens processing and lens assembly.

[0067] 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 object side surface and the image side surface of the first lens L1 can also be provided with other concave and convex distribution conditions.

[0068] The focal length of the first lens L1 is f1, and the following relationship is satisfied: -4.01≤f1 / f≤-1.19. The relationship defines the ratio of the focal length of the first lens L1 to the focal length of the imaging optical lens. Within the range of the relationship, the focal length of the imaging optical lens is reasonably distributed, so that the imaging optical lens has better imaging quality and lower sensitivity. Preferably, -2.51≤f1 / f≤-1.48 is satisfied.

[0069] The central curvature radius of the object side surface of the first lens L1 is R1, and the central curvature radius of the image side surface of the first lens L1 is R2. The following relationship is satisfied: -1.15≤(R1+R2) / (R1-R2)≤0.23. By reasonably controlling the shape of the first lens L1, the first lens L1 can effectively correct the system spherical aberration. Preferably, -0.72≤(R1+R2) / (R1-R2)≤0.18 is satisfied.

[0070] The on-axis thickness of the first lens L1 is d1, and the following relationship is satisfied: 0.03≤d1 / TTL≤0.12. The relationship defines the ratio of the on-axis thickness of the first lens L1 to the total optical length. Within the range of the relationship, the thickness of the first lens L1 is controlled, which is convenient for injection molding and helps light collection, thereby ensuring wide-angle design. Preferably, 0.04≤d1 / TTL≤0.10 is satisfied.

[0071] The object side surface of the second lens L2 is convex at the paraxial region, and the image side surface is convex at the paraxial region. The object side surface of the second lens L2 can also be provided in other concave and convex distribution conditions.

[0072] The central curvature radius of the object side surface of the second lens L2 is R3, and the central curvature radius of the image side surface of the second lens L2 is R4. The following relationship is satisfied: -0.08≤(R3+R4) / (R3-R4)≤0.17. The relationship defines the shape of the second lens L2. When within the range, as the lens develops towards ultra-thin wide-angle, it is beneficial to correct the on-axis chromatic aberration problem. Preferably, -0.05≤(R3+R4) / (R3-R4)≤0.13 is satisfied.

[0073] The on-axis thickness of the second lens L2 is d3, and the following relationship is satisfied: 0.07≤d3 / TTL≤0.28. Within the range of the relationship, it is beneficial to achieve ultra-thin design. Preferably, 0.11≤d3 / TTL≤0.22 is satisfied.

[0074] The object side surface of the third lens L3 is convex at the paraxial region, and the image side surface is concave at the paraxial region. The object side surface and the image side surface of the third lens L3 can also be provided in other concave and convex distribution conditions.

[0075] The focal length of the third lens L3 is defined as f3, and the following relationship is satisfied: -13.61≤f3 / f≤-1.13, which defines the ratio of the focal length of the third lens L3 to the focal length f of the photographing optical lens. Within the range of the relationship, the focal length of the photographing optical lens is reasonably distributed, so that the photographing optical lens has better imaging quality and lower sensitivity. Preferably, -8.51≤f3 / f≤-1.41 is satisfied.

[0076] The on-axis thickness of the third lens L3 is d5, and the following relationship is satisfied: 0.02≤d5 / TTL≤0.07, which is beneficial to the realization of ultra-thin within the range of the relationship. Preferably, 0.03≤d5 / TTL≤0.06 is satisfied.

[0077] The object side of the fourth lens L4 is concave at the paraxial region, and the image side is convex at the paraxial region. The image side of the fourth lens L4 can also be provided with other concave and convex distribution conditions.

[0078] The focal length of the fourth lens L4 is f4, and the following relationship is satisfied: 0.64≤f4 / f≤2.25, which reasonably distributes the optical power, so that the system has better imaging quality and lower sensitivity. Preferably, 1.02≤f4 / f≤1.80 is satisfied.

[0079] The photographing optical lens also satisfies the following relationship: 0.58≤(R7+R8) / (R7-R8)≤2.16, which defines the shape of the fourth lens L4. When within the 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, 0.92≤(R7+R8) / (R7-R8)≤1.73 is satisfied.

[0080] The on-axis thickness of the fourth lens L4 is d7, and the following relationship is satisfied: 0.08≤d7 / TTL≤0.27, which is beneficial to the realization of ultra-thin within the range of the relationship. Preferably, 0.13≤d7 / TTL≤0.22 is satisfied.

[0081] 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 and the image side of the fifth lens L5 can also be provided with other concave and convex distribution conditions.

[0082] The focal length of the fifth lens L5 is f5, and the following relationship is satisfied: -4.29≤f5 / f≤-1.05, which effectively makes the ray angle of the photographing optical lens gentle and reduces the tolerance sensitivity. Preferably, -2.68≤f5 / f≤-1.31 is satisfied.

[0083] The central curvature radius of the object side surface of the fifth lens L5 is R9, the central curvature radius of the image side surface of the fifth lens L5 is R10, and the following relationship is satisfied: 1.53≤(R9+R10) / (R9-R10)≤5.06, which defines the shape of the fifth lens L5. When the range is satisfied, with the development of ultra-thin wide-angle, it is beneficial to correct the aberration of the off-axis angle and the like. Preferably, 2.45≤(R9+R10) / (R9-R10)≤4.05 is satisfied.

[0084] The fifth lens L5 also satisfies the following relationship: 0.05≤d9 / TTL≤0.19. When the range of the relationship is satisfied, it is beneficial to realize ultra-thin. Preferably, 0.08≤d9 / TTL≤0.15 is satisfied.

[0085] The maximum image height of the imaging optical lens is IH, and the following relationship is satisfied: TTL / IH≤1.91. When the range of the relationship is satisfied, it is beneficial to realize ultra-thin.

[0086] The combined focal length of the first lens L1 and the second lens L2 is f12, and the following relationship is satisfied: 0.45≤f12 / f≤2.06. When the range of the relationship is satisfied, the aberration and distortion of the imaging optical lens can be eliminated, and the back focal length of the imaging optical lens can be suppressed, thereby maintaining the miniaturization of the imaging lens system. Preferably, 0.72≤f12 / f≤1.65 is satisfied.

[0087] The field of view FOV of the imaging optical lens is greater than or equal to 111.00°, thereby realizing wide-angle.

[0088] The aperture value FNO of the imaging optical lens is less than or equal to 2.05, thereby realizing large aperture, and the imaging performance of the imaging optical lens is good.

[0089] The imaging 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.

[0090] TTL: total optical length (on-axis distance from the object side surface of the first lens L1 to the image surface Si), unit: mm;

[0091] Aperture value FNO: refers to the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter.

[0092] Next, the technical solutions of the present application will be specifically described in four embodiments, and a comparative embodiment is provided as a reference. When the range of the above relationship is exceeded, the technical effects of the present application cannot be realized.

[0093] (First embodiment)

[0094] Table 1, Table 2 show the design data of the photographing optical lens 10 of the first embodiment of the present application.

[0095]

Table 1

[0096] Wherein, the meaning of each symbol is as follows.

[0097] S1: aperture;

[0098] R: radius of curvature at the center of the optical surface;

[0099] R1: central radius of curvature of the object side surface of the first lens L1;

[0100] R2: central radius of curvature of the image side surface of the first lens L1;

[0101] R3: central radius of curvature of the object side surface of the second lens L2;

[0102] R4: central radius of curvature of the image side surface of the second lens L2;

[0103] R5: central radius of curvature of the object side surface of the third lens L3;

[0104] R6: central radius of curvature of the image side surface of the third lens L3;

[0105] R7: central radius of curvature of the object side surface of the fourth lens L4;

[0106] R8: central radius of curvature of the image side surface of the fourth lens L4;

[0107] R9: central radius of curvature of the object side surface of the fifth lens L5;

[0108] R10: central radius of curvature of the image side surface of the fifth lens L5;

[0109] R11: central radius of curvature of the object side surface of the optical filter GF;

[0110] R12: central radius of curvature of the image side surface of the optical filter GF;

[0111] d: on-axis thickness of the lens, on-axis distance between lenses;

[0112] d0: on-axis distance from the aperture S1 to the object side surface of the first lens L1;

[0113] d1: on-axis thickness of the first lens L1;

[0114] d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0115] d3: on-axis thickness of the second lens L2;

[0116] d4: an on-axis distance from an image-side surface of the second lens L2 to an object-side surface of the third lens L3;

[0117] d5: an on-axis thickness of the third lens L3;

[0118] d6: an on-axis distance from an image-side surface of the third lens L3 to an object-side surface of the fourth lens L4;

[0119] d7: an on-axis thickness of the fourth lens L4;

[0120] d8: an on-axis distance from an image-side surface of the fourth lens L4 to an object-side surface of the fifth lens L5;

[0121] d9: an on-axis thickness of the fifth lens L5;

[0122] d10: an on-axis distance from an image-side surface of the fifth lens L5 to an object-side surface of the optical filter GF;

[0123] d11: an on-axis thickness of the optical filter GF;

[0124] d12: an on-axis distance from an image-side surface of the optical filter GF to the image plane Si;

[0125] nd: a refractive index for a d-line (the d-line is green light having a wavelength of 555 nm);

[0126] nd1: a refractive index for a d-line of the first lens L1;

[0127] nd2: a refractive index for a d-line of the second lens L2;

[0128] nd3: a refractive index for a d-line of the third lens L3;

[0129] nd4: a refractive index for a d-line of the fourth lens L4;

[0130] nd5: a refractive index for a d-line of the fifth lens L5;

[0131] ndg: a refractive index for a d-line of the optical filter GF;

[0132] vd: an Abbe number;

[0133] v1: an Abbe number of the first lens L1;

[0134] v2: an Abbe number of the second lens L2;

[0135] v3: an Abbe number of the third lens L3;

[0136] v4: an Abbe number of the fourth lens L4;

[0137] v5: an Abbe number of the fifth lens L5;

[0138] vg: Abbe number of optical filter GF.

[0139] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.

[0140]

Table 2

[0141] 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 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0142] 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 surface at a distance r from the optical axis and a tangent plane at the vertex of the aspherical surface).

[0143] Fig. 2, Fig. 3 respectively show axial aberration and magnification chromatic aberration diagrams of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 10 of the first embodiment. Fig. 4 shows field curvature and distortion diagrams of light having a wavelength of 555 nm after passing through the imaging optical lens 10 of the first embodiment, the field curvature S of Fig. 4 being in the sagittal direction and the field curvature T being in the tangential direction.

[0144] In the embodiment, the entrance pupil diameter ENPD of the photographing optical lens 10 is 1.140mm, the full field of view image height IH is 3.269mm, the diagonal direction field of view angle FOV is 119.15°, the photographing optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin, the on-axis and off-axis chromatic aberration is fully corrected, and the photographing optical lens 10 has excellent optical characteristics.

[0145] (Second Embodiment)

[0146] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0147] FIG. 5 shows the photographing optical lens 20 of the second embodiment of the present application.

[0148] Tables 3 and 4 show the design data of the photographing optical lens 20 of the second embodiment of the present application.

[0149] [Table 3]

[0150] Table 4 shows the aspheric surface data of each lens in the photographing optical lens 20 of the second embodiment of the present application.

[0151] [Table 4]

[0152] FIGS. 6 and 7 respectively show the axial aberration and the magnification chromatic aberration diagrams of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm passing through the photographing optical lens 20 of the second embodiment. FIG. 8 shows the field curvature and distortion diagrams of light with a wavelength of 555nm passing through the photographing 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.

[0153] In the embodiment, the entrance pupil diameter ENPD of the photographing optical lens 20 is 1.015mm, the full field of view image height IH is 3.269mm, the diagonal direction field of view angle FOV is 121.74°, the photographing optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thin, the on-axis and off-axis chromatic aberration is fully corrected, and the photographing optical lens 20 has excellent optical characteristics.

[0154] (Third Embodiment)

[0155] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0156] FIG. 9 shows the photographing optical lens 30 of the third embodiment of the present application.

[0157] Tables 5 and 6 show the design data of the photographing optical lens 30 of the third embodiment of the present application.

[0158] Table 5

[0159] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 of the third embodiment of the present application.

[0160] Table 6

[0161] Fig. 10, Fig. 11 respectively show axial aberration and 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 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.

[0162] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 1.240 mm, the full field image height IH is 3.269 mm, and the field of view FOV in the diagonal direction is 111.07°. The imaging 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.

[0163] (Fourth Embodiment)

[0164] The symbol meanings of the fourth embodiment are the same as those of the first embodiment.

[0165] Fig. 13 shows the imaging optical lens 40 of the fourth embodiment of the present application.

[0166] Table 7, Table 8 show the design data of the imaging optical lens 40 of the fourth embodiment of the present application.

[0167] Table 7

[0168] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 of the fourth embodiment of the present application.

[0169] Table 8

[0170] Fig. 14 and Fig. 15 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 camera optical lens 40 of the fourth embodiment. Fig. 16 shows the field curvature and distortion of light with a wavelength of 555 nm after passing through the camera optical lens 40 of the third embodiment. The field curvature S of Fig. 16 is the sagittal field curvature, and the field curvature T is the tangential field curvature.

[0171] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 1.100 mm, the full field image height IH is 3.269 mm, and the diagonal field angle FOV is 124.06°. The camera 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.

[0172] The later appearing Table 11 shows the values corresponding to the parameters defined in the various numerical values and relationships in the first, second, third and fourth embodiments.

[0173] (Comparative Embodiment)

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

[0175] Fig. 17 shows the camera optical lens 50 of the comparative embodiment of the present application.

[0176] Table 9 and Table 10 show the design data of the camera optical lens 50 of the comparative embodiment of the present application.

[0177] [Table 9]

[0178] Table 10 shows the aspheric surface data of each lens in the camera optical lens 50 of the comparative embodiment of the present application.

[0179] [Table 10]

[0180] 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 camera optical lens 50 of the comparative embodiment. Fig. 20 shows the field curvature and distortion of light with a wavelength of 546 nm after passing through the camera 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.

[0181] The following Table 11 lists the values corresponding to each of the above relationships in the comparative embodiment. Obviously, the imaging optical lens 50 of the comparative embodiment does not satisfy the above relationship 0.70≤f2 / f≤1.10, and the imaging effect is poor.

[0182] In the comparative embodiment, the entrance pupil diameter ENPD of the imaging optical lens 50 is 1.268 mm, the full field of view image height IH is 3.269 mm, and the field of view angle FOV in the diagonal direction is 117.71°. The imaging optical lens 50 does not satisfy the design requirements of large aperture, wide angle, and ultra-thin.

[0183]

Table 11

[0184] Those skilled in the art can understand 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 five 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 negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power. 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 central curvature radius of the object side of the first lens is R1, the central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side of the third lens is R6, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, and the following relationships are satisfied: 0.70≤f2 / f≤1.10; 2.00≤(R5+R6) / (R5-R6)≤10.00; 0.70≤R1 / f1≤1.30; 5.50≤R7 / R8≤14.

00.

2. The camera optical lens according to claim 1, wherein, The total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 2.00≤TTL / f≤3.

00.

3. The camera optical lens according to claim 1, wherein, The edge thickness of the fifth lens is ET5, the on-axis thickness of the fifth lens is d9, and the following relationship is satisfied: 1.35≤ET5 / d9≤2.

00.

4. The camera optical lens according to claim 1, characterized in that, The object side of the first lens is concave at the near axis, and the image side of the first lens is concave at the near axis; The focal length of the first lens is f1, the central curvature radius of the image side of the first lens is R2, the on-axis thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: -4.01≤f1 / f≤-1.19; -1.15≤(R1+R2) / (R1-R2)≤0.23; 0.03≤d1 / TTL≤0.

12. The object side of the second lens is convex at the near axis, and the image side of the second lens is convex at the near axis; 5. The camera optical lens according to claim 1, wherein, The central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, the on-axis thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: -0.08≤(R3+R4) / (R3-R4)≤0.17; 0.07≤d3 / TTL≤0.

28. The object side of the third lens is convex at the near axis, and the image side of the third lens is concave at the near axis; 6. The camera optical lens according to claim 1, characterized in that, The focal length of the third lens is f3, the on-axis thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: -13.61≤f3 / f≤-1.13; 0.02≤d5 / TTL≤0.

07. The object side of the fourth lens is concave at the near axis, and the image side of the fourth lens is convex at the near axis; 7. The camera optical lens according to claim 1, wherein, The focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 0.64≤f4 / f≤2.25; ​ 0.58≤(R7+R8) / (R7-R8)≤2.16; 0.08≤d7 / TTL≤0.

27.

8. The camera optical lens according to claim 1, characterized in that, The object side surface of the fifth lens is convex at the paraxial region, and the image side surface of the fifth lens is concave at the paraxial region; The focal length of the fifth lens is f5, the central curvature radius of the object side surface of the fifth lens is R9, the central curvature radius of the image side surface of the fifth lens is R10, the 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: -4.29≤f5 / f≤-1.05; 1.53≤(R9+R10) / (R9-R10)≤5.06; 0.05≤d9 / TTL≤0.

19.

9. The camera optical lens according to claim 1, characterized in that, The total track length of the camera optical lens is TTL, the maximum image height of the camera optical lens is IH, and the following relationship is met: TTL / IH≤1.

91.

10. The camera optical lens according to claim 1, characterized in that, The combined focal length of the first lens and the second lens is f12, and the following relationship is met: 0.45≤f12 / f≤2.06.

Images