Camera lens

Abstract

The application relates to the field of optical lenses, and discloses a camera optical lens, which is sequentially provided with a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power from an object side to an image side; the camera optical lens satisfies the following relationship: 0.18 <= d1 / TTL <= 0.40; 0.60 <= ET1 / d1 <= 0.90; (R3+R4) / (R3-R4) >= 2.50; and 3.50 <= d6 / d8 <= 10.00. The camera optical lens has excellent optical characteristics and has the characteristics of large aperture, wide angle and ultra-thin.

Description

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 monitors, PC 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 of the pixel size of photosensitive devices, in addition to the current trend of electronic products being light and thin, the small-sized camera optical lens with good imaging quality has become the mainstream in the market. In order to obtain better imaging quality, a multi-piece lens structure is often used. With the development of technology and the increasing of user's diversified needs, under the condition that the pixel area of the photosensitive device is continuously reduced and the requirement of the system for imaging quality is continuously improved, a 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. SUMMARY

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

[0004] To solve the above technical problems, the embodiment of the present application provides a camera optical lens, which is 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 refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; wherein the total optical length of the camera optical lens is TTL, the on-axis thickness of the first lens is d1, the thickness of the first lens parallel to the axis at both ends is ET1, the central curvature radius of the object side surface of the second lens is R3, the central curvature radius of the image side surface of the second lens is R4, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, and the following relationships are satisfied: 0.18≤d1 / TTL≤0.40; 0.60≤ET1 / d1≤0.90; (R3+R4) / (R3-R4)≥2.50; 3.50≤d6 / d8≤10.00.

[0005] Preferably, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, and the following relationship is satisfied:

[0006] (R5+R6) / (R5-R6)≤-2.50.

[0007] Preferably, the object side surface of the first lens is convex at the paraxial region, the image side surface of the first lens is convex at the paraxial region; the focal length of the photographing optical lens is f, the focal length of the first lens is f1, the central radius of curvature of the object side surface of the first lens is R1, the central radius of curvature of the image side surface of the first lens is R2, and the following relationships are established: 0.46≤f1 / f≤1.49; -1.86≤(R1+R2) / (R1-R2)≤-0.14.

[0008] Preferably, the object side surface of the second lens is convex at the paraxial region, the image side surface of the second lens is concave at the paraxial region; the focal length of the photographing optical lens is f, the focal length of the second lens is f2, the on-axis thickness of the second lens is d3, and the following relationships are established: -5.07≤f2 / f≤-1.46; 0.03≤d3 / TTL≤0.08.

[0009] Preferably, the focal length of the photographing optical lens is f, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the following relationships are established: -27.39≤f3 / f≤85.98; 0.03≤d5 / TTL≤0.09.

[0010] Preferably, the image side surface of the fourth lens is convex at the paraxial region; the focal length of the photographing optical lens is f, the focal length of the fourth lens is f4, the central radius of curvature of the object side surface of the fourth lens is R7, the central radius of curvature of the image side surface of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, and the following relationships are established: 0.49≤f4 / f≤2.90; 0.49≤(R7+R8) / (R7-R8)≤5.07; 0.05≤d7 / TTL≤0.17.

[0011] 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 photographing optical lens is f, the focal length of the fifth lens is f5, the central radius of curvature of the object side surface of the fifth lens is R9, the central radius of curvature of the image side surface of the fifth lens is R10, the on-axis thickness of the fifth lens is d9, and the following relationships are established: -5.51≤f5 / f≤-0.73; 1.79≤(R9+R10) / (R9-R10)≤7.73; 0.04≤d9 / TTL≤0.21.

[0012] Preferably, the focal length of the photographing optical lens is f, the combined focal length of the first lens and the second lens is f12, and the following relationship is established: 0.64≤f12 / f≤2.15.

[0013] Preferably, the field of view (FOV) of the camera optical lens in the diagonal direction is FOV, and satisfies the following relationship: FOV≥78.00°.

[0014] Preferably, the image height of the camera optical lens is IH, and satisfies the following relationship: TTL / IH≤1.70.

[0015] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0019] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0020] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0021] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0022] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0023] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0024] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0025] Figure 9is a structural schematic diagram of a camera optical lens of a third embodiment of the present application;

[0026] Figure 10 is Figure 9 is an axial aberration schematic diagram of the camera optical lens shown in FIG. 8;

[0027] Figure 11 is Figure 9 is a lateral chromatic aberration schematic diagram of the camera optical lens shown in FIG. 8;

[0028] Figure 12 is Figure 9 is a field curvature and distortion schematic diagram of the camera optical lens shown in FIG. 8;

[0029] Figure 13 is a structural schematic diagram of a camera optical lens of a fourth embodiment of the present application;

[0030] Figure 14 is Figure 13 is an axial aberration schematic diagram of the camera optical lens shown in FIG. 10;

[0031] Figure 15 is Figure 13 is a lateral chromatic aberration schematic diagram of the camera optical lens shown in FIG. 10;

[0032] Figure 16 is Figure 13 is a field curvature and distortion schematic diagram of the camera optical lens shown in FIG. 10;

[0033] Figure 17 is a structural schematic diagram of a camera optical lens of a comparative embodiment;

[0034] Figure 18 is Figure 17 is an axial aberration schematic diagram of the camera optical lens shown in FIG. 12;

[0035] Figure 19 is Figure 17 is a lateral chromatic aberration schematic diagram of the camera optical lens shown in FIG. 12;

[0036] Figure 20 is Figure 17 is a field curvature and distortion schematic diagram of the camera optical lens shown in FIG. 12. DETAILED DESCRIPTION

[0037] 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 of ordinary skill in the art can understand that, in each embodiment of the present application, many technical details are presented in order to make the present application better understood by the reader. 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.

[0038] (First Embodiment)

[0039] Referring to the drawings, the present application provides a camera lens 10. Figure 1 The camera lens 10 of the first embodiment of the present application is shown, which comprises five lenses. Specifically, the camera lens 10, from the object side to the image side, comprises an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. An optical element such as a filter GF can be arranged between the fifth lens L5 and the image plane Si.

[0040] In the present embodiment, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, and the fifth lens L5 has negative refractive power. In other alternative embodiments, the refractive power of each lens can be other choices.

[0041] In addition, 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. In other alternative embodiments, each lens can also be made of other materials.

[0042] In the present embodiment, the total optical length of the camera lens 10 is defined as TTL, and the on-axis thickness of the first lens L1 is defined as d1, which satisfies the following relationship: 0.18≤d1 / TTL≤0.40. The ratio of the on-axis thickness d1 of the first lens L1 to the total optical length TTL of the camera lens 10 is defined, which is within the conditional range, which helps to compress the total optical length TTL of the camera lens 10, and realizes the small head effect of the camera lens 10.

[0043] The thickness of the parallel axis of the first lens L1 is defined as ET1, which satisfies the following relationship: 0.60≤ET1 / d1≤0.90. The ratio of the thickness ET1 of the parallel axis of the first lens L1 to the on-axis thickness d1 of the first lens L1 is defined, which is within the conditional range, which is conducive to lens processing and assembly.

[0044] The central curvature radius of the object side of the second lens L2 is defined as R3, and the central curvature radius of the image side of the second lens L2 is defined as R4, which satisfies the following relationship: (R3+R4) / (R3-R4)≥2.50. The shape of the second lens L2 is defined, which is within the range, which can reduce the deflection degree of light, effectively correct the chromatic aberration, and make the chromatic aberration |LC|≤2.5μm.

[0045] An axial distance from an image side surface of the third lens L3 to an object side surface of the fourth lens L4 is defined as d6, and an axial distance from an image side surface of the fourth lens L4 to an object side surface of the fifth lens L5 is defined as d8, and the following relationship is satisfied: 3.50≤d6 / d8≤10.00. The ratio of the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 to the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5 is defined, and within the conditional range, the optical total length of the photographing optical lens 10 is compressed, and an ultra-thin effect is achieved.

[0046] A central curvature radius of the object side surface of the third lens L3 is defined as R5, and a central curvature radius of the image side surface of the third lens L3 is defined as R6, and the following relationship is satisfied: (R5+R6) / (R5-R6)≤-2.50. The shape of the third lens L3 is defined, which is beneficial to correcting the astigmatism and distortion of the photographing optical lens 10, so that the distortion |Distortion|≤2.0%, and the possibility of dark corner generation is reduced.

[0047] In the embodiment, the object side surface of the first lens L1 is convex at the paraxial region, and the image side surface is convex at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the first lens L1 can also be provided with other concave and convex distribution conditions.

[0048] A focal length of the photographing optical lens 10 is defined as f, and a focal length of the first lens L1 is defined as f1, and the following relationship is satisfied: 0.46≤f1 / f≤1.49. The ratio of the focal length f1 of the first lens L1 to the focal length f of the photographing optical lens 10 is defined. When the ratio is within the defined range, the first lens L1 has appropriate positive refractive power, which is beneficial to reducing system aberration and developing the lens to an ultra-thin direction. Preferably, 0.74≤f1 / f≤1.19 is satisfied.

[0049] A central curvature radius of the object side surface of the first lens L1 is defined as R1, and a central curvature radius of the image side surface of the first lens L1 is defined as R2, and the following relationship is satisfied: -1.86≤(R1+R2) / (R1-R2)≤-0.14. The shape of the first lens L1 is defined, and when the ratio is within the range, the lens is developed to an ultra-thin wide-angle direction, which is beneficial to correcting the on-axis chromatic aberration problem. Preferably, -1.16≤(R1+R2) / (R1-R2)≤-0.18 is satisfied.

[0050] In the embodiment, the object side surface of the second lens L2 is convex at the paraxial region, and the image side surface is concave at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the second lens L2 can also be provided with other concave and convex distribution conditions.

[0051] The focal length of the second lens L2 is defined as f2, and the following relationship is satisfied: -5.07≤f2 / f≤-1.46. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -3.17≤f2 / f≤-1.82 is satisfied.

[0052] The on-axis thickness of the second lens L2 is d3, and the following relationship is satisfied: 0.03≤d3 / TTL≤0.08. Within the conditional range, it is beneficial to achieve ultra-thin. Preferably, 0.04≤d3 / TTL≤0.07 is satisfied.

[0053] In the embodiment, the object side of the third lens L3 is concave at the paraxial region, and the image side is convex at the paraxial region. In other alternative embodiments, the object side and the image side of the third lens L3 can also be provided with other concave and convex distribution conditions.

[0054] The focal length of the third lens L3 is defined as f3, and the following relationship is satisfied: -27.39≤f3 / f≤85.98. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -17.12≤f3 / f≤68.78 is satisfied.

[0055] The on-axis thickness of the third lens L3 is d5, and the following relationship is satisfied: 0.03≤d5 / TTL≤0.09. Within the conditional range, it is beneficial to achieve ultra-thin. Preferably, 0.05≤d5 / TTL≤0.07 is satisfied.

[0056] In the embodiment, the object side of the fourth lens L4 is convex at the paraxial region, and the image side is convex at the paraxial region. In other alternative embodiments, the object side and the image side of the fourth lens L4 can also be provided with other concave and convex distribution conditions.

[0057] The focal length of the fourth lens L4 is defined as f4, and the following relationship is satisfied: 0.49≤f4 / f≤2.90. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, 0.78≤f4 / f≤2.32 is satisfied.

[0058] The central curvature radius of the object side of the fourth lens L4 is R7, and the central curvature radius of the image side of the fourth lens L4 is R8, and the following relationship is satisfied: 0.49≤(R7+R8) / (R7-R8)≤5.07. The shape of the fourth lens L4 is specified. 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, 0.79≤(R7+R8) / (R7-R8)≤4.05 is satisfied.

[0059] The on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.05≤d7 / TTL≤0.17. Within the conditional range, it is beneficial to achieve ultra-thinning. Preferably, 0.08≤d7 / TTL≤0.14 is satisfied.

[0060] In the embodiment, the object side surface of the fifth lens L5 is convex at the paraxial region, and the image side surface is concave at the paraxial region. In other alternative embodiments, the object side surface and the image side surface of the fifth lens L5 can also be provided with other concave and convex distribution conditions.

[0061] The focal length of the fifth lens L5 is defined as f5, which satisfies the following relationship: -5.51≤f5 / f≤-0.73. The limitation of the fifth lens L5 can effectively make the light angle of the imaging optical lens 10 gentle, and reduce the tolerance sensitivity. Preferably, -3.45≤f5 / f≤-0.92 is satisfied.

[0062] 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: 1.79≤(R9+R10) / (R9-R10)≤7.73. The shape of the fifth lens L5 is specified. 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, 2.86≤(R9+R10) / (R9-R10)≤6.18 is satisfied.

[0063] The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.04≤d9 / TTL≤0.21. Within the conditional range, it is beneficial to achieve ultra-thinning. Preferably, 0.07≤d9 / TTL≤0.16 is satisfied.

[0064] In the embodiment, the combined focal length of the first lens L1 and the second lens L2 is f12, which satisfies the following relationship: 0.64≤f12 / f≤2.15. Within the conditional range, the aberration and distortion of the imaging optical lens 10 can be eliminated, and the back focal length of the imaging optical lens 10 can be suppressed, thereby maintaining the miniaturization of the imaging lens system. Preferably, 1.03≤f12 / f≤1.72 is satisfied.

[0065] In the embodiment, the diagonal field of view of the imaging optical lens 10 is defined as FOV, which satisfies the following relationship: FOV≥78.00°, thereby being beneficial to achieve wide-angle.

[0066] In the embodiment, the image height of the imaging optical lens 10 is IH, which satisfies the following relationship: TTL / IH≤1.70, thereby being beneficial to achieve ultra-thinning.

[0067] In the embodiment, the aperture value FNO of the camera optical lens 10 is less than or equal to 2.05, so that a large aperture is achieved, and the camera optical lens has good imaging performance.

[0068] The camera optical lens 10 has good optical performance, and can meet the design requirements of large aperture, wide angle, and ultra-thin; according to the characteristics of the camera optical lens 10, the camera optical lens 10 is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS, and other camera elements.

[0069] The camera optical lens 10 of the present application will be described below by examples. The symbols described in each example are shown below. The units of focal length, on-axis distance, thickness of both ends of parallel axis, central curvature radius, on-axis thickness, inflection point position, and stationary point position are mm.

[0070] TTL: total optical length (on-axis distance from the object side of the first lens L1 to the image plane Si), unit: mm;

[0071] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0072] Preferably, an inflection point and / or a stationary point can also be arranged on the object side and / or the image side of the lens to meet the high-quality imaging requirements. Specific implementation schemes are described below.

[0073] Table 1 and Table 2 show the design data of the camera optical lens 10 of the first embodiment of the present application.

[0074]

Table 1

[0075]

[0076] The meanings of the symbols are as follows.

[0077] S1: aperture;

[0078] R: curvature radius at the center of the optical surface;

[0079] R1: central curvature radius of the object side of the first lens L1;

[0080] R2: central curvature radius of the image side of the first lens L1;

[0081] R3: central curvature radius of the object side of the second lens L2;

[0082] R4: central curvature radius of the image side of the second lens L2;

[0083] R5: central curvature radius of the object side of the third lens L3;

[0084] R6: central radius of curvature of the image side surface of the third lens L3;

[0085] R7: central radius of curvature of the object side surface of the fourth lens L4;

[0086] R8: central radius of curvature of the image side surface of the fourth lens L4;

[0087] R9: central radius of curvature of the object side surface of the fifth lens L5;

[0088] R10: central radius of curvature of the image side surface of the fifth lens L5;

[0089] R11: central radius of curvature of the object side surface of the optical filter GF;

[0090] R12: central radius of curvature of the image side surface of the optical filter GF;

[0091] d: on-axis thickness of a lens, on-axis distance between lenses;

[0092] d0: on-axis distance from the stop S1 to the object side surface of the first lens L1;

[0093] d1: on-axis thickness of the first lens L1;

[0094] d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0095] d3: on-axis thickness of the second lens L2;

[0096] d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0097] d5: on-axis thickness of the third lens L3;

[0098] d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0099] d7: on-axis thickness of the fourth lens L4;

[0100] d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0101] d9: on-axis thickness of the fifth lens L5;

[0102] d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0103] d11: on-axis thickness of the optical filter GF;

[0104] d12: on-axis distance from the image side surface of the optical filter GF to the image plane Si;

[0105] nd: refractive index of d line (d line is green light having a wavelength of 550 nm);

[0106] nd1: refractive index of d line of the first lens L1;

[0107] nd2: refractive index of d line of the second lens L2;

[0108] nd3: refractive index of d line of the third lens L3;

[0109] nd4: refractive index of d line of the fourth lens L4;

[0110] nd5: refractive index of d line of the fifth lens L5;

[0111] ndg: refractive index of d line of the optical filter GF;

[0112] vd: Abbe number;

[0113] v1: Abbe number of the first lens L1;

[0114] v2: Abbe number of the second lens L2;

[0115] v3: Abbe number of the third lens L3;

[0116] v4: Abbe number of the fourth lens L4;

[0117] v5: Abbe number of the fifth lens L5;

[0118] vg: Abbe number of the optical filter GF.

[0119] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.

[0120]

Table 2

[0121]

[0122]

[0123] 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).

[0124] 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 (1)

[0125] wherein k is the conic constant, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance of a point on the aspherical curve from the optical axis, and z is the aspherical depth (the perpendicular distance between a point on the aspherical curve at a distance r from the optical axis and a tangent plane to the aspherical surface at the vertex on the optical axis).

[0126] Tables 3 and 4 show the design data of the inflection points and the stationary points of each lens in the camera optical lens 10 according to the first embodiment of the present application. In the tables, P1R1 and P1R2 represent the object side surface and the image side surface of the first lens L1, respectively, P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, respectively, P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, respectively, P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, respectively, P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, respectively. The data in the column of "inflection point position" corresponds to the perpendicular distance from the optical axis of the camera optical lens 10 of the inflection point provided on each lens surface. The data in the column of "stationary point position" corresponds to the perpendicular distance from the optical axis of the camera optical lens 10 of the stationary point provided on each lens surface.

[0127] [Table 3]

[0128]

[0129]

[0130] [Table 4]

[0131] Number of stationary points Stationary point position 1 Stationary point position 2 P1R1 0 / / P1R2 0 / / P2R1 0 / / P2R2 1 0.825 / P3R1 0 / / P3R2 1 0.875 / P4R1 2 0.925 1.395 P4R2 2 0.415 1.055 P5R1 1 0.705 / P5R2 1 0.995 /

[0132] Figure 2 、 Figure 3 The axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 nm, respectively, after passing through the camera optical lens 10 according to the first embodiment are shown in FIGS. 1A, 1B, 2A, 2B, 3A and 3B, respectively. Figure 4 The field curvature and the distortion of light with a wavelength of 555 nm after passing through the camera optical lens 10 according to the first embodiment are shown in FIGS. 4A and 4B, respectively. Figure 4 The field curvature S is the sagittal field curvature, and T is the tangential field curvature.

[0133] Table 21 appearing later shows the values corresponding to the parameters prescribed in the various numerical values and conditional expressions in each of the embodiments 1, 2, 3, and 4 and the comparative example.

[0134] As shown in Table 21, the first embodiment satisfies each conditional expression.

[0135] In the present embodiment, the entrance pupil diameter ENPD of the photographing optical lens 10 is 1.358 mm, the full field image height IH is 2.297 mm, and the diagonal direction field of view FOV is 78.20°. The photographing optical lens 10 satisfies the design requirements of large aperture, wide angle, and ultra-thin, and the on-axis and off-axis chromatic aberrations are sufficiently corrected, and has excellent optical characteristics.

[0136] (Second Embodiment)

[0137] The second embodiment is basically the same as the first embodiment, and the symbol meanings are the same as those of the first embodiment. Only the different points are listed below.

[0138] Figure 5 The photographing optical lens 20 of the second embodiment of the present application is shown.

[0139] In the present embodiment, the third lens L3 has positive refractive power, 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 concave at the paraxial region, and the object side surface of the fourth lens L4 is concave at the paraxial region.

[0140] Tables 5 and 6 show the design data of the photographing optical lens 20 of the second embodiment of the present application.

[0141] [Table 5]

[0142]

[0143] Table 6 shows the aspherical surface data of each lens in the photographing optical lens 20 of the second embodiment of the present application.

[0144] [Table 6]

[0145]

[0146]

[0147] Tables 7 and 8 show the inflection point and stationary point design data of each lens in the photographing optical lens 20 of the second embodiment of the present application.

[0148] [Table 7]

[0149] Number of inflection points Inflection point position 1 Inflection point position 2 Inflection point position 3 Inflection point position 4 P1R1 1 0.685 / / / P1R2 2 0.655 0.685 / / P2R1 2 0.155 0.645 / / P2R2 2 0.425 0.725 / / P3R1 2 0.085 0.715 / / P3R2 2 0.215 0.715 / / P4R1 3 0.155 0.615 1.225 / P4R2 2 0.305 0.675 / / P5R1 3 0.415 1.075 1.605 / P5R2 4 0.485 1.705 1.815 1.865

[0150] [Table 8]

[0151]

[0152]

[0153] Figure 6 , Figure 7 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 430nm passes through the camera optical lens 20 of the second embodiment. Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0154] As shown in Table 21, the second embodiment satisfies each conditional expression.

[0155] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 20 is 1.347 mm, the full field of view (IH) is 2.297 mm, and the field of view (FOV) in the diagonal direction is 78.40°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0156] (Third Implementation)

[0157] The third implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0158] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0159] In this embodiment, the object-side surface of the fourth lens L4 is concave near the axis.

[0160] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0161] Table 9

[0162]

[0163]

[0164] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0165] Table 10

[0166]

[0167] Tables 11 and 12 show the inflection point and the design data of the stationary point of each lens in the imaging optical lens 30 of the third embodiment of the present application.

[0168] [Table 11]

[0169]

[0170]

[0171] [Table 12]

[0172] Number of stationary points Stationary point position 1 Stationary point position 2 P1R1 0 / / P1R2 0 / / P2R1 0 / / P2R2 0 / / P3R1 0 / / P3R2 1 0.895 / P4R1 2 0.125 0.895 P4R2 2 0.345 1.145 P5R1 1 0.685 / P5R2 1 0.925 /

[0173] Figure 10 、 Figure 11 Figures 11, 12, 13, 14, 15 and 16 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 nm after passing through the imaging optical lens 30 of the third embodiment of the present application. Figure 12 Figures 17 and 18 respectively show the field curvature and the distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 30 of the third embodiment of the present application. Figure 12 The field curvature S is the sagittal field curvature, and T is the tangential field curvature.

[0174] Table 21 lists the numerical values corresponding to each condition formula in the present embodiment according to the above condition formulas. Obviously, the imaging optical lens 30 of the present embodiment satisfies the above condition formulas.

[0175] The entrance pupil diameter ENPD of the imaging optical lens 30 is 1.357 mm, the full field image height IH is 2.297 mm, and the field of view FOV in the diagonal direction is 78.20°. The imaging optical lens 30 satisfies 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.

[0176] (Fourth Embodiment)

[0177] The fourth embodiment is basically the same as the first embodiment, and the symbol meanings are the same as the first embodiment. Only the different points are listed below.

[0178] Figure 13 The imaging optical lens 40 of the fourth embodiment of the present application is shown.

[0179] In the present embodiment, the object side surface of the fourth lens L4 is concave at the near axis.

[0180] Tables 13 and 14 show the design data of the imaging optical lens 40 of the fourth embodiment of the present application.

[0181] [Table 13]

[0182]

[0183] Table 14 shows aspherical surface data of each lens in the imaging optical lens 40 of the fourth embodiment of the present application.

[0184]

Table 14

[0185]

[0186]

[0187] Tables 15 and 16 show the inflection point and the nodal point design data of each lens in the imaging optical lens 40 of the fourth embodiment of the present application.

[0188]

Table 15

[0189]

[0190]

Table 16

[0191] Number of stationary points Stationary point position 1 Stationary point position 2 P1R1 0 / / P1R2 0 / / P2R1 1 0.195 / P2R2 1 0.635 / P3R1 0 / / P3R2 1 0.905 / P4R1 2 0.105 0.885 P4R2 2 0.365 0.955 P5R1 1 0.715 / P5R2 1 0.965 /

[0192] Figure 14 、 Figure 15 Figures 17 to 21 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 nm after passing through the imaging optical lens 40 of the fourth embodiment. Figure 16 Figures 22 and 23 respectively show the field curvature and the distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0193] As shown in Table 21, the fourth embodiment satisfies each conditional expression.

[0194] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 40 is 1.363 mm, the full field image height IH is 2.297 mm, and the field of view FOV in the diagonal direction is 78.19°. The imaging optical lens 40 satisfies the design requirements of large aperture, wide angle and ultra-thin, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical characteristics.

[0195] (Comparative Embodiment)

[0196] The symbol meanings of the comparative embodiment are the same as those of the first embodiment, and only the different points are listed below.

[0197] Figure 17 The imaging optical lens 50 of the comparative embodiment is shown.

[0198] In the present embodiment, the third lens L3 has positive refractive power, 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 concave at the paraxial region, and the object side surface of the fourth lens L4 is concave at the paraxial region.

[0199] Tables 17 and 18 show the design data of the imaging optical lens 50 of the comparative embodiment.

[0200] [Table 17]

[0201]

[0202]

[0203] Table 18 shows the aspheric surface data of each lens in the imaging optical lens 50 of the comparative embodiment.

[0204] [Table 18]

[0205]

[0206] Tables 19 and 20 show the inflection point and the stationary point design data of each lens in the imaging optical lens 50 of the comparative embodiment.

[0207] [Table 19]

[0208]

[0209]

[0210] [Table 20]

[0211] Number of stationary points Stationary point position 1 Stationary point position 2 Stationary point position 3 P1R1 0 / / / P1R2 0 / / / P2R1 2 0.565 0.665 / P2R2 2 0.585 0.705 / P3R1 1 0.195 / / P3R2 2 0.345 0.825 / P4R1 3 0.325 0.955 1.365 P4R2 2 0.615 0.825 / P5R1 3 0.855 1.425 1.725 P5R2 1 1.165 / /

[0212] Figure 18 、 Figure 19 Figures 17 to 21 respectively show the axial aberration and the lateral chromatic aberration diagrams of the light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 nm after passing through the imaging optical lens 50 of the comparative embodiment. Figure 20 Figures 22 and 23 respectively show the field curvature and the distortion diagrams of the light with a wavelength of 555 nm 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.

[0213] Table 21 lists the numerical values corresponding to each condition formula in the comparative embodiment according to the above condition formulas. Apparently, the imaging optical lens 50 of the comparative embodiment does not satisfy the condition formula 0.18≤d1 / TTL≤0.40.

[0214] In the comparative embodiment, the entrance pupil diameter ENPD of the photographing optical lens 50 is 1.337 mm, the full field of view image height IH is 2.297 mm, and the field of view angle FOV in the diagonal direction is 78.40°. The photographing optical lens 50 does not meet the design requirements of large aperture, wide angle, and ultra-thin.

[0215]

Table 21

[0216]

[0217]

[0218] It can be understood by those skilled in the art that the above-mentioned embodiments are specific embodiments for implementing the present application, and in actual application, 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 positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; The object side surface of the first lens is convex at the near axis, and the image side surface of the first lens is convex at the near axis; The object side surface of the second lens is convex at the near axis, and the image side surface of the second lens is concave at the near axis; The image 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 of the fifth lens is concave at the near axis; Wherein, the total optical length of the camera optical lens is TTL, the on-axis thickness of the first lens is d1, the thickness of the first lens parallel to the axis is ET1, the central curvature radius of the object side surface of the second lens is R3, the central curvature radius of the image side surface of the second lens is R4, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, and the following relationships are satisfied: 0.18≤d1 / TTL≤0.40; 0.60≤ET1 / d1≤0.90; (R3+R4) / (R3-R4)≥2.50; 3.50≤d6 / d8≤10.00; (R5+R6) / (R5-R6)≤-2.

50.

2. The camera optical lens according to claim 1, wherein, The focal length of the camera optical lens is f, the focal length of the first lens is f1, the central curvature radius of the object side surface of the first lens is R1, and the central curvature radius of the image side surface of the first lens is R2, and the following relationships are satisfied: 0.46≤f1 / f≤1.49; -1.86≤(R1+R2) / (R1-R2)≤-0.

14.

3. The camera optical lens according to claim 1, wherein, The focal length of the camera optical lens is f, the focal length of the second lens is f2, and the on-axis thickness of the second lens is d3, and the following relationships are satisfied: -5.07≤f2 / f≤-1.46; 0.03≤d3 / TTL≤0.

08.

4. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, the focal length of the third lens is f3, and the on-axis thickness of the third lens is d5, and the following relationships are satisfied: -27.39≤f3 / f≤85.98; 0.03≤d5 / TTL≤0.

09.

5. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, the focal length of the fourth lens is f4, the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the on-axis thickness of the fourth lens is d7, and the following relationships are satisfied: 0.49≤f4 / f≤2.90; 0.49≤(R7+R8) / (R7-R8)≤5.07; 0.05≤d7 / TTL≤0.

17.

6. The camera optical lens according to claim 1, characterized in that, A focal length of the camera optical lens is f, a focal length of the fifth lens is f5, a central curvature radius of an object side surface of the fifth lens is R9, a central curvature radius of an image side surface of the fifth lens is R10, an on-axis thickness of the fifth lens is d9, and the following relationships are satisfied: -5.51≤f5 / f≤-0.73; 1.79≤(R9+R10) / (R9-R10)≤7.73; 0.04≤d9 / TTL≤0.

21.

7. The camera optical lens according to claim 1, wherein, A focal length of the camera optical lens is f, a combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied: 0.64≤f12 / f≤2.

15.

8. The camera optical lens according to claim 1, characterized in that, A field angle in a diagonal direction of the camera optical lens is FOV, and the following relationship is satisfied: FOV≥78.00°.

9. The camera optical lens according to claim 1, characterized in that, An image height of the camera optical lens is IH, and the following relationship is satisfied: 1.59≤TTL / IH≤1.70.

Images