Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises, 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 negative refractive power, a fifth lens with refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; wherein the Abbe number of the first lens is v1, the on-axis thickness of the first lens is d1, the edge thickness of the first lens is ET1, 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 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, and the following relationships are satisfied: 59.00 <= v1 <= 82.00; 3.00 <= d1 / ET1 <= 5.00; 0 <= (R5+R6) / (R5-R6) <= 1.00; -15.00 <= R9 / R10 <= -3.00.

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, and 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 development trend of electronic products being light and thin, a small 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 seven-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 characterized in that the camera optical lens comprises seven lenses in sequence from an object side to an 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 negative refractive power, a fifth lens with refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; the third lens has opposite refractive power to the fifth lens; the object side surface of the first lens is convex at a near axis; the image side surface of the first lens is concave at the near axis; the object side surface of the second lens is convex at the near axis; the image side surface of the second lens is concave at the near axis; the object side surface of the fourth lens is convex at the near axis; the image side surface of the fourth lens is concave at the near axis; the object side surface of the sixth lens is convex at the near axis; the image side surface of the sixth lens is concave at the near axis; the object side surface of the seventh lens is concave at the near axis; the image side surface of the seventh lens is concave at the near axis; wherein the Abbe number of the first lens is v1, the on-axis thickness of the first lens is d1, the edge thickness of the first lens is ET1, 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 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 central curvature radius of the object side surface of the sixth lens is R11, the central curvature radius of the image side surface of the sixth lens is R12, and the following relationships are satisfied: 59.00≤v1≤82.00; 3.00≤d1 / ET1≤5.00; 0≤(R5+R6) / (R5-R6)≤1.00; -15.00≤R9 / R10≤-3.00; -3.64≤(R11+R12) / (R11-R12)≤-0.98.

[0005] Preferably, 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 relationship is satisfied: 1.50≤d8 / d6≤4.00.

[0006] Preferably, 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, the central curvature radius of the image side surface of the first lens is R2, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 0.50≤f1 / f≤1.65; -4.39≤(R1+R2) / (R1-R2)≤-1.37; 0.06≤d1 / TTL≤0.19.

[0007] Preferably, a focal length of the photographing optical lens is f, a focal length of the second lens is f2, a central curvature radius of an object side of the second lens is R3, a central curvature radius of an image side of the second lens is R4, an on-axis thickness of the second lens is d3, an overall optical length of the photographing optical lens is TTL, and the following relationships are satisfied: -16.07≤f2 / f≤-2.93; 1.15≤(R3+R4) / (R3-R4)≤11.28; 0.02≤d3 / TTL≤0.06.

[0008] Preferably, a focal length of the photographing optical lens is f, a focal length of the third lens is f3, an on-axis thickness of the third lens is d5, an overall optical length of the photographing optical lens is TTL, and the following relationships are satisfied: -228.62≤f3 / f≤15.61; 0.03≤d5 / TTL≤0.13.

[0009] Preferably, a focal length of the photographing optical lens is f, a focal length of the fourth lens is f4, a central curvature radius of an object side of the fourth lens is R7, a central curvature radius of an image side of the fourth lens is R8, an on-axis thickness of the fourth lens is d7, an overall optical length of the photographing optical lens is TTL, and the following relationships are satisfied: -26.23≤f4 / f≤-3.20; 0.61≤(R7+R8) / (R7-R8)≤21.44; 0.02≤d7 / TTL≤0.07.

[0010] Preferably, a focal length of the photographing optical lens is f, a focal length of the fifth lens is f5, an on-axis thickness of the fifth lens is d9, an overall optical length of the photographing optical lens is TTL, and the following relationships are satisfied: -6.05≤f5 / f≤71.71; 0.03≤d9 / TTL≤0.09.

[0011] Preferably, a focal length of the photographing optical lens is f, a focal length of the sixth lens is f6, an on-axis thickness of the sixth lens is d11, an overall optical length of the photographing optical lens is TTL, and the following relationships are satisfied: 0.33≤f6 / f≤1.35; 0.04≤d11 / TTL≤0.13.

[0012] Preferably, a focal length of the photographing optical lens is f, a focal length of the seventh lens is f7, a central curvature radius of an object side of the seventh lens is R13, a central curvature radius of an image side of the seventh lens is R14, an on-axis thickness of the seventh lens is d13, an overall optical length of the photographing optical lens is TTL, and the following relationships are satisfied: -1.42≤f7 / f≤-0.45; -1.30≤(R13+R14) / (R13-R14)≤-0.35; 0.03≤d13 / TTL≤0.12.

[0013] Preferably, the first lens is made of glass.

[0014] 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

[0015] 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:

[0016] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0018] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0019] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0020] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0021] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0022] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0023] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0024] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0025] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0026] Figure 11 is a schematic diagram of the lateral chromatic aberration of the camera optical lens shown in FIG. 1; Figure 9

[0027] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in FIG. 1; Figure 9

[0028] Figure 13 is a schematic diagram of the structure of the camera optical lens of the fourth embodiment of the present application;

[0029] Figure 14 is a schematic diagram of the axial aberration of the camera optical lens shown in FIG. 1; Figure 13

[0030] Figure 15 is a schematic diagram of the lateral chromatic aberration of the camera optical lens shown in FIG. 1; Figure 13

[0031] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in FIG. 1; Figure 13

[0032] Figure 17 is a schematic diagram of the structure of the camera optical lens of the comparative embodiment;

[0033] Figure 18 is a schematic diagram of the axial aberration of the camera optical lens shown in FIG. 1; Figure 17

[0034] Figure 19 is a schematic diagram of the lateral chromatic aberration of the camera optical lens shown in FIG. 1; Figure 17

[0035] Figure 20 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in FIG. 1. Figure 17 DETAILED DESCRIPTION

[0036] For the purpose of making the object, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, even without these technical details and based on various changes and modifications of the following embodiments, the technical solutions claimed by the present application can be realized.

[0037] (first embodiment)

[0038] With reference to the drawings, the present application provides a camera optical lens 10. Figure 1 ​​​​​​​​The first embodiment of the present application is shown in a photographing optical lens 10, which includes seven lenses. Specifically, the photographing optical lens 10, from the object side to the image side, includes an aperture S1, a first lens L1, a second lens L2, a third lens L3, 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.

[0039] In the embodiment, 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. In other alternative embodiments, the lenses can be made of other materials.

[0040] In the embodiment, the Abbe number of the first lens L1 is defined as v1, and satisfies the following relationship: 59.00≤v1≤82.00. The Abbe number of the first lens L1 is defined in the range, which effectively distributes the material properties, effectively improves the aberration, and improves the imaging quality.

[0041] The on-axis thickness of the first lens L1 is defined as d1, the edge thickness of the first lens L1 is defined as ET1, and satisfies the following relationship: 3.00≤d1 / ET1≤5.00. The ratio of the on-axis thickness and the edge thickness of the first lens L1 is defined in the range, which is beneficial to the processing and assembly of the first lens L1.

[0042] The central curvature radius of the object side surface of the third lens L3 is defined as R5, the central curvature radius of the image side surface of the third lens L3 is defined as R6, and satisfies the following relationship: 0≤(R5+R6) / (R5-R6)≤1.00. The shape of the third lens L3 is defined in the range, which can reduce the deflection degree of light, effectively correct the chromatic aberration, and make the chromatic aberration |LC|≤3.5μm.

[0043] The central curvature radius of the object side surface of the fifth lens L5 is defined as R9, the central curvature radius of the image side surface of the fifth lens L5 is defined as R10, and satisfies the following relationship: -15.00≤R9 / R10≤-3.00. The shape of the fifth lens L5 is defined in the range, which is beneficial to correcting the astigmatism and the distortion of the photographing optical lens 10, making the distortion |Distortion|≤2.5%, and reducing the possibility of generating a dark corner.

[0044] The axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 is defined as d6, 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 as d8, and the following relationship is satisfied: 1.50≤d8 / d6≤4.00, which defines the ratio of the air gap between the fourth lens L4 and the fifth lens L5 to the air gap between the third lens L3 and the fourth lens L4, and helps to compress the total length of the photographing optical lens 10 within the conditional range, thereby achieving the effect of ultra-thin.

[0045] In the embodiment, the object side surface of the first lens L1 is convex at the paraxial region, the image side surface is concave at the paraxial region, and the first lens L1 has positive refractive power. 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.

[0046] The focal length of the photographing optical lens 10 is defined as f, and the focal length of the first lens L1 is defined as f1. The following relationship is satisfied: 0.50≤f1 / f≤1.65, which defines the ratio of the positive refractive power of the first lens L1 to the overall focal length. When the ratio is within the specified range, the first lens L1 has appropriate positive refractive power, which is beneficial to reducing system aberration and facilitating the development of the photographing optical lens 10 towards ultra-thin and wide-angle. Preferably, 0.79≤f1 / f≤1.32 is satisfied.

[0047] The central curvature radius of the object side surface of the first lens L1 is defined as R1, and the central curvature radius of the image side surface of the first lens L1 is defined as R2. The following relationship is satisfied: -4.39≤(R1+R2) / (R1-R2)≤-1.37, which reasonably controls the shape of the first lens L1 so that the first lens L1 can effectively correct system spherical aberration. Preferably, -2.74≤(R1+R2) / (R1-R2)≤-1.714 is satisfied.

[0048] The axial thickness of the first lens L1 is defined as d1, and the total optical length of the photographing optical lens 10 is defined as TTL. The following relationship is satisfied: 0.06≤d1 / TTL≤0.19, which is beneficial to achieving ultra-thin within the conditional range. Preferably, 0.09≤d1 / TTL≤0.16 is satisfied.

[0049] In the embodiment, the object side surface of the second lens L2 is convex at the paraxial region, the image side surface is concave at the paraxial region, and the second lens L2 has negative refractive power. 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.

[0050] The focal length of the photographing optical lens 10 is defined as f, and the focal length of the second lens L2 is f2, and the following relationship is satisfied: -16.07≤f2 / f≤-2.93. By controlling the negative focal power of the second lens L2 within a reasonable range, the aberration of the optical system is corrected. Preferably, -10.04≤f2 / f≤-3.67 is satisfied.

[0051] 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, and the following relationship is satisfied: 1.15≤(R3+R4) / (R3-R4)≤11.28. The shape of the second lens L2 is specified. When within the range, as the lens develops towards ultra-thin wide-angle, the on-axis chromatic aberration problem is corrected. Preferably, 1.84≤(R3+R4) / (R3-R4)≤9.02 is satisfied.

[0052] The on-axis thickness of the second lens L2 is d3, and the total optical length of the photographing optical lens 10 is TTL, and the following relationship is satisfied: 0.02≤d3 / TTL≤0.06. Within the conditional range, the ultra-thin is realized. Preferably, 0.03≤d3 / TTL≤0.05 is satisfied.

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

[0054] The focal length of the photographing optical lens 10 is defined as f, and the focal length of the third lens L3 is f3, and the following relationship is satisfied: -228.62≤f3 / f≤15.61. By reasonable distribution of the focal power, the system has better imaging quality and lower sensitivity. Preferably, -142.89≤f3 / f≤12.49 is satisfied.

[0055] The on-axis thickness of the third lens L3 is d5, and the total optical length of the photographing optical lens 10 is TTL, and the following relationship is satisfied: 0.03≤d5 / TTL≤0.13. Within the conditional range, the ultra-thin is realized. Preferably, 0.04≤d5 / TTL≤0.10 is satisfied.

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

[0057] The focal length of the photographing optical lens 10 is defined as f, and the focal length of the fourth lens L4 is defined as f4, and the following relationship is satisfied: -26.23≤f4 / f≤-3.20. Through reasonable distribution of the refractive power, the system has better imaging quality and lower sensitivity. Preferably, -16.39≤f4 / f≤-3.99 is satisfied.

[0058] The central radius of curvature of the object side surface of the fourth lens L4 is R7, and the central radius of curvature of the image side surface of the fourth lens L4 is R8, and the following relationship is satisfied: 0.61≤(R7+R8) / (R7-R8)≤21.44. The shape of the fourth lens L4 is defined. When the range is satisfied, as the lens develops towards ultra-thin wide-angle, it is beneficial to correct the on-axis chromatic aberration problem. Preferably, 0.98≤(R7+R8) / (R7-R8)≤17.15 is satisfied.

[0059] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the photographing optical lens 10 is TTL, and the following relationship is satisfied: 0.02≤d7 / TTL≤0.07. When the range is satisfied, it is beneficial to achieve ultra-thin. Preferably, 0.03≤d7 / TTL≤0.05 is satisfied.

[0060] In the embodiment, the object side surface of the fifth lens L5 is concave at the paraxial region, the image side surface of the fifth lens L5 is concave at the paraxial region, and the fifth lens L5 has negative refractive power. 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 distributions, and the fifth lens L5 can also have positive refractive power.

[0061] The focal length of the photographing optical lens 10 is defined as f, and the focal length of the fifth lens L5 is defined as f5, and the following relationship is satisfied: -6.05≤f5 / f≤71.71. The limitation of the fifth lens L5 can effectively make the light angle of the photographing optical lens 10 gentle, and reduce the tolerance sensitivity. Preferably, -3.78≤f5 / f≤57.37 is satisfied.

[0062] The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the photographing optical lens 10 is TTL, and the following relationship is satisfied: 0.03≤d9 / TTL≤0.09. When the range is satisfied, it is beneficial to achieve ultra-thin. Preferably, 0.05≤d9 / TTL≤0.07 is satisfied.

[0063] In the embodiment, the object side surface of the sixth lens L6 is convex at the paraxial region, the image side surface of the sixth lens L6 is concave at the paraxial region, and the sixth lens L6 has positive refractive power. In other alternative embodiments, the object side surface and the image side surface of the sixth lens L6 can also be provided with other concave and convex distributions.

[0064] The focal length of the photographing optical lens 10 is defined as f, and the focal length of the sixth lens L6 is defined as f6, and the following relationship is satisfied: 0.33≤f6 / f≤1.35. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, 0.53≤f6 / f≤1.08 is satisfied.

[0065] The central radius of curvature of the object side surface of the sixth lens L6 is R11, the central radius of curvature of the image side surface of the sixth lens L6 is R12, and the following relationship is satisfied: -3.64≤(R11+R12) / (R11-R12)≤-0.98. The shape of the sixth lens L6 is defined, and when the condition range is developed, it is beneficial to correct the aberration of the off-axis angle and other problems. Preferably, -2.28≤(R11+R12) / (R11-R12)≤-1.23 is satisfied.

[0066] The on-axis thickness of the sixth lens L6 is d11, and the total optical length of the photographing optical lens 10 is TTL, and the following relationship is satisfied: 0.04≤d11 / TTL≤0.13. Within the conditional range, it is beneficial to achieve ultra-thinning. Preferably, 0.06≤d11 / TTL≤0.10 is satisfied.

[0067] In the embodiment, the object side surface of the seventh lens L7 is concave at the near axis, the image side surface is concave at the near axis, and the seventh lens L7 has negative refractive power. In other alternative embodiments, the object side surface and the image side surface of the seventh lens L7 can also be provided with other concave and convex distributions.

[0068] The focal length of the photographing optical lens 10 is defined as f, and the focal length of the seventh lens L7 is defined as f7, and the following relationship is satisfied: -1.42≤f7 / f≤-0.45. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -0.89≤f7 / f≤-0.56 is satisfied.

[0069] The central radius of curvature of the object side surface of the seventh lens L7 is R13, the central radius of curvature of the image side surface of the seventh lens L7 is R14, and the following relationship is satisfied: -1.30≤(R13+R14) / (R13-R14)≤-0.35. The shape of the seventh lens L7 is defined, and when the condition range is developed, it is beneficial to correct the aberration of the off-axis angle and other problems. Preferably, -0.81≤(R13+R14) / (R13-R14)≤-0.44 is satisfied.

[0070] The on-axis thickness of the seventh lens L7 is d13, and the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.03≤d13 / TTL≤0.12. Within the range of the conditional expression, it is beneficial to achieve ultra-thinning. Preferably, 0.05≤d13 / TTL≤0.10 is satisfied.

[0071] In the embodiment, the image height of the camera optical lens 10 is IH, the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: TTL / IH≤1.26, thereby benefiting the realization of ultra-thinning. Preferably, TTL / IH≤1.21 is satisfied.

[0072] In the embodiment, the field of view FOV of the camera optical lens 10 is greater than or equal to 86.00°, thereby achieving wide-angle.

[0073] In the embodiment, the F-number FNO of the camera optical lens 10 is less than or equal to 1.82, thereby achieving a large aperture, and the camera optical lens has good imaging performance. Preferably, the F-number FNO of the camera optical lens 10 is less than or equal to 1.78.

[0074] The camera optical lens 10 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, 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.

[0075] The camera optical lens 10 of the present application will be described below with examples. The symbols described in each example are as follows. The units of focal length, on-axis distance, central curvature radius, on-axis thickness, inflection point position, and stationary point position are mm.

[0076] TTL: total optical length (on-axis distance from the object side of the first lens L1 to the image surface Si), unit: mm;

[0077] F-number FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0078] Preferably, an inflection point and / or a stationary point can also be provided on the object side and / or the image side of the lens to meet the high-quality imaging requirements. For specific implementation schemes, please refer to the description below.

[0079] Table 1 and Table 2 show the design data of the camera optical lens 10 of the first embodiment of the present application.

[0080]

Table 1

[0081]

[0082]

[0083] wherein the symbols have the following meanings.

[0084] S1: stop;

[0085] R: radius of curvature at the center of the optical surface;

[0086] R1: central radius of curvature of the object side surface of the first lens L1;

[0087] R2: central radius of curvature of the image side surface of the first lens L1;

[0088] R3: central radius of curvature of the object side surface of the second lens L2;

[0089] R4: central radius of curvature of the image side surface of the second lens L2;

[0090] R5: central radius of curvature of the object side surface of the third lens L3;

[0091] R6: central radius of curvature of the image side surface of the third lens L3;

[0092] R7: central radius of curvature of the object side surface of the fourth lens L4;

[0093] R8: central radius of curvature of the image side surface of the fourth lens L4;

[0094] R9: central radius of curvature of the object side surface of the fifth lens L5;

[0095] R10: central radius of curvature of the image side surface of the fifth lens L5;

[0096] R11: central radius of curvature of the object side surface of the sixth lens L6;

[0097] R12: central radius of curvature of the image side surface of the sixth lens L6;

[0098] R13: central radius of curvature of the object side surface of the seventh lens L7;

[0099] R14: central radius of curvature of the image side surface of the seventh lens L7;

[0100] R15: central radius of curvature of the object side surface of the optical filter GF; R16: central radius of curvature of the image side surface of the optical filter GF; d: on-axis thickness of the lens, on-axis distance between the lenses;

[0101] d0: on-axis distance from the stop S1 to the object side surface of the first lens L1;

[0102] d1: on-axis thickness of the first lens L1;

[0103] d2: on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2; d3: on-axis thickness of the second lens L2;

[0104] d4: on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3; d5: on-axis thickness of the third lens L3;

[0105] d6: on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4; d7: on-axis thickness of the fourth lens L4;

[0106] d8: on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5; d9: on-axis thickness of the fifth lens L5;

[0107] d10: on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6; d11: on-axis thickness of the sixth lens L6;

[0108] d12: on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7; d13: on-axis thickness of the seventh lens L7;

[0109] d14: on-axis distance from the image-side surface of the seventh lens L7 to the object-side surface of the optical filter GF; d15: on-axis thickness of the optical filter GF;

[0110] d16: on-axis distance from the image-side surface of the optical filter GF to the image plane Si;

[0111] nd: refractive index of the d-line (the d-line is green light having a wavelength of 550 nm);

[0112] nd1: refractive index of the d-line of the first lens L1;

[0113] nd2: refractive index of the d-line of the second lens L2;

[0114] nd3: refractive index of the d-line of the third lens L3;

[0115] nd4: refractive index of the d-line of the fourth lens L4;

[0116] nd5: refractive index of the d-line of the fifth lens L5;

[0117] nd6: refractive index of the d-line of the sixth lens L6;

[0118] nd7: refractive index of the d-line of the seventh lens L7;

[0119] ndg: refractive index of the d-line of the optical filter GF;

[0120] vd: Abbe number;

[0121] v1: Abbe number of the first lens L1;

[0122] v2: Abbe number of the second lens L2;

[0123] v3: Abbe number of the third lens L3;

[0124] v4: Abbe number of the fourth lens L4;

[0125] v5: Abbe number of the fifth lens L5;

[0126] v6: Abbe number of the sixth lens L6;

[0127] v7: Abbe number of the seventh lens L7;

[0128] vg: Abbe number of the optical filter GF.

[0129] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0130] Table 2

[0131]

[0132]

[0133] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0134] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A

[0135] 16r 16 +A18r 18 +A20r 20 (1)

[0136] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and a tangent plane at the vertex of the aspheric optical axis).

[0137] Tables 3 and 4 show the inflection point and stagnation point design data of each lens in the camera optical lens 10 of the first embodiment of the present invention. P1R1 and P1R2 represent the object-side and image-side surfaces of the first lens L1, respectively; P2R1 and P2R2 represent the object-side and image-side surfaces of the second lens L2, respectively; P3R1 and P3R2 represent the object-side and image-side surfaces of the third lens L3, respectively; P4R1 and P4R2 represent the object-side and image-side surfaces of the fourth lens L4, respectively; P5R1 and P5R2 represent the object-side and image-side surfaces of the fifth lens L5, respectively; P6R1 and P6R2 represent the object-side and image-side surfaces of the sixth lens L6, respectively; and P7R1 and P7R2 represent the object-side and image-side surfaces of the seventh lens L7, respectively. The data corresponding to the "Inflection Point Position" column is the vertical distance from the inflection point set on the surface of each lens to the optical axis of the camera optical lens 10. The data in the "Station Point Position" field corresponds to the vertical distance from the station point set on each lens surface to the optical axis of the camera optical lens 10.

[0138] Table 3

[0139] Number of inflection points Inflection point position 1 Inflection point position 2 Inflection point position 3 Inflection point position 4 P1R1 1 1.365 / / / P1R2 1 0.935 / / / P2R1 0 / / / / P2R2 0 / / / / P3R1 2 0.385 1.255 / / P3R2 0 / / / / P4R1 1 0.415 / / / P4R2 2 0.485 1.515 / / P5R1 1 1.685 / / / P5R2 4 0.235 1.625 2.065 2.225 P6R1 2 0.735 2.165 / / P6R2 2 0.995 3.105 / / P7R1 3 1.315 3.525 3.775 / P7R2 4 0.305 3.345 3.825 4.065

[0140] Table 4

[0141] Number of stationary points Stationary point position 1 P1R1 0 / P1R2 1 1.385 P2R1 0 / P2R2 0 / P3R1 1 0.595 P3R2 0 / P4R1 1 0.685 P4R2 1 0.815 P5R1 0 / P5R2 1 0.425 P6R1 1 1.355 P6R2 1 1.555 P7R1 1 3.935 P7R2 1 0.565

[0142] Figure 2 , Figure 3 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 610nm, 555nm, 510nm, 470nm and 436nm passes through the camera optical lens 10 of the first embodiment. Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0143] Table 21, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in the conditional expressions in each of the first, second, third, and fourth embodiments.

[0144] As shown in Table 21, the first embodiment satisfies all the conditional expressions.

[0145] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 3.023 mm, the full field of view (IH) is 5.161 mm, and the field of view (FOV) in the diagonal direction is 86.40°. The camera optical lens 10 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.

[0146] (Second Implementation)

[0147] The second 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.

[0148] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0149] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0150] Table 5

[0151]

[0152]

[0153] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0154] Table 6

[0155]

[0156] Tables 7 and 8 show the inflection point and stagnation point design data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0157] Table 7

[0158] Number of inflection points Inflection point position 1 Inflection point position 2 Inflection point position 3 Inflection point position 4 P1R1 1 1.435 / / / P1R2 1 0.995 / / / P2R1 0 / / / / P2R2 0 / / / / P3R1 2 0.415 1.245 / / P3R2 1 1.385 / / / P4R1 2 0.155 1.455 / / P4R2 2 0.385 1.525 / / P5R1 1 1.685 / / / P5R2 4 0.225 1.615 2.085 2.195 P6R1 2 0.735 2.165 / / P6R2 3 0.995 3.125 3.335 / P7R1 3 1.335 3.625 3.745 / P7R2 4 0.295 3.365 3.895 4.065

[0159] Table 8

[0160] Number of stationary points Stationary point position 1 P1R1 0 / P1R2 1 1.415 P2R1 0 / P2R2 0 / P3R1 1 0.665 P3R2 0 / P4R1 1 0.285 P4R2 1 0.625 P5R1 0 / P5R2 1 0.415 P6R1 1 1.355 P6R2 1 1.535 P7R1 1 3.925 P7R2 1 0.545

[0161] Figure 6 , Figure 7 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 656nm, 610nm, 555nm, 510nm, 470nm and 436nm after passing 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.

[0162] As shown in Table 21, the second embodiment satisfies each conditional expression.

[0163] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 20 is 2.984 mm, the full field of view (IH) is 5.161 mm, and the field of view (FOV) in the diagonal direction is 87.20°. 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.

[0164] (Third Implementation)

[0165] 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.

[0166] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0167] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0168] Table 9

[0169]

[0170] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0171] Table 10

[0172]

[0173] Tables 11 and 12 show the inflection point and stagnation point design data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0174] Table 11

[0175]

[0176]

[0177] Table 12

[0178] Number of stationary points Stationary point position 1 P1R1 0 / P1R2 0 / P2R1 0 / P2R2 0 / P3R1 1 0.385 P3R2 0 / P4R1 1 0.085 P4R2 1 0.435 P5R1 0 / P5R2 1 0.315 P6R1 1 1.345 P6R2 1 1.485 P7R1 0 / P7R2 1 0.585

[0179] Figure 10 , Figure 11 A schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656nm, 610nm, 555nm, 510nm, 470nm and 436nm passes through the camera optical lens 30 of the third embodiment are shown respectively. Figure 12 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 30 of the third embodiment. Figure 12The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0180] Table 21 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 30 of this embodiment satisfies the above-described conditional expressions.

[0181] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 30 is 2.987 mm, the full field of view (IH) is 5.161 mm, and the field of view (FOV) in the diagonal direction is 87.40°. The camera optical lens 30 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.

[0182] (Fourth Implementation)

[0183] The fourth 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.

[0184] In this embodiment, the object-side surface of the third lens L3 is concave near the axis, the image-side surface of the third lens L3 is concave near the axis, the object-side surface of the fifth lens L5 is convex near the axis, the image-side surface of the fifth lens L5 is convex near the axis, the third lens L3 has negative refractive power, and the fifth lens L5 has positive refractive power.

[0185] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0186] Tables 13 and 14 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0187] Table 13

[0188]

[0189] Table 14 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0190] Table 14

[0191]

[0192]

[0193] Tables 15 and 16 show the inflection point and stagnation point design data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0194] Table 15

[0195]

[0196]

[0197] Table 16

[0198] Number of stationary points Stationary point position 1 Stationary point position 2 P1R1 0 / / P1R2 1 1.425 / P2R1 0 / / P2R2 0 / / P3R1 2 0.075 0.335 P3R2 1 0.215 / P4R1 1 0.535 / P4R2 1 0.735 / P5R1 1 0.035 / P5R2 0 / / P6R1 1 1.335 / P6R2 1 1.485 / P7R1 0 / / P7R2 1 0.635 /

[0199] Figure 14 , Figure 15 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 610nm, 555nm, 510nm, 470nm and 436nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0200] Table 21 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 40 of this embodiment satisfies the above-described conditional expressions.

[0201] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 40 is 2.966 mm, the full field of view (IH) is 5.161 mm, and the field of view (FOV) in the diagonal direction is 87.60°. The camera optical lens 40 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.

[0202] (Comparative Implementation Methods)

[0203] The symbols in the comparative implementation method have the same meanings as those in the first implementation method; only the differences are listed below.

[0204] Figure 17 The image shows a camera lens 50 according to a comparative embodiment.

[0205] Tables 17 and 18 show the design data of the camera optical lens 50 of the comparative embodiment.

[0206] Table 17

[0207]

[0208] Table 18 shows the aspherical data of each lens in the camera optical lens 50 of the comparative embodiment.

[0209] Table 18

[0210]

[0211]

[0212] Tables 19 and 20 show the inflection point and stagnation point design data of each lens in the camera optical lens 50 of the comparative embodiment.

[0213] Table 19

[0214] Number of inflection points Inflection point position 1 Inflection point position 2 Inflection point position 3 Inflection point position 4 P1R1 1 1.385 / / / P1R2 1 0.975 / / / P2R1 0 / / / / P2R2 0 / / / / P3R1 1 0.305 / / / P3R2 0 / / / / P4R1 1 0.305 / / / P4R2 2 0.425 1.495 / / P5R1 1 1.685 / / / P5R2 4 0.225 1.615 2.065 2.225 P6R1 3 0.735 2.175 3.015 / P6R2 3 0.985 3.125 3.315 / P7R1 3 1.325 3.585 3.785 / P7R2 4 0.255 3.305 3.845 4.085

[0215] Table 20

[0216]

[0217]

[0218] Figure 18 , Figure 19 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 656nm, 610nm, 555nm, 510nm, 470nm, and 436nm after passing through the camera optical lens 50 of the comparative embodiment. Figure 20 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 50 of the comparative embodiment. Figure 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0219] Table 21 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the above conditional expression 59.00≤v1≤82.00.

[0220] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.06mm, the full field of view image height IH is 5.161mm, and the field of view FOV in the diagonal direction is 85.50°. The camera optical lens 50 does not meet the design requirements of large aperture, FOV≥86.00° wide-angle, and ultra-thin design.

[0221] Table 21

[0222]

[0223]

[0224] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A camera optical lens, characterized in that, The camera optical lens comprises seven lenses, which, from the object side to the image side, are 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 negative refractive power, a fifth lens with refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; the refractive power of the third lens is opposite to that of the fifth lens; the object side of the first lens is convex at the paraxial direction, and the image side of the first lens is concave at the paraxial direction; the object side of the second lens is convex at the paraxial direction, and the image side of the second lens is concave at the paraxial direction; the object side of the fourth lens is convex at the paraxial direction, and the image side of the fourth lens is concave at the paraxial direction; the object side of the sixth lens is convex at the paraxial direction, and the image side of the sixth lens is concave at the paraxial direction; the object side of the seventh lens is concave at the paraxial direction, and the image side of the seventh lens is concave at the paraxial direction. Wherein, the Abbe number of the first lens is v1, the axial thickness of the first lens is d1, the edge thickness of the first lens is ET1, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, 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 central radius of curvature of the object-side surface of the sixth lens is R11, and the central radius of curvature of the image-side surface of the sixth lens is R12, and the following relationship is satisfied: 59.00≤v1≤82.00； 3.00≤d1 / ET1≤5.00; 0≤(R5+R6) / (R5-R6)≤1.00; -15.00≤R9 / R10≤-3.00; -3.64≤(R11+R12) / (R11-R12)≤-0.

98.

2. The camera optical lens according to claim 1, characterized in that, The axial distance from the image-side surface of the third lens to the object-side surface of the fourth lens is d6, and the axial distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens is d8, satisfying the following relationship: 1.50≤d8 / d6≤4.

00.

3. 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 first lens is f1, the central radius of curvature of the object side of the first lens is R1, the central radius of curvature of the image side of the first lens is R2, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.50≤f1 / f≤1.65; -4.39≤(R1+R2) / (R1-R2)≤-1.37; 0.06≤d1 / TTL≤0.

19.

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 second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -16.07≤f² / f≤-2.93; 1.15≤(R3+R4) / (R3-R4)≤11.28; 0.02≤d3 / TTL≤0.

06.

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 third lens is f3, the on-axis thickness of the third lens is d5, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -228.62≤f3 / f≤15.61; 0.03≤d5 / TTL≤0.

13.

6. 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 radius of curvature of the object side of the fourth lens is R7, the central radius of curvature of the image side of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -26.23≤f4 / f≤-3.20; 0.61≤(R7+R8) / (R7-R8)≤21.44; 0.02≤d7 / TTL≤0.

07.

7. 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 fifth lens is f5, the on-axis thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -6.05≤f5 / f≤71.71; 0.03≤d9 / TTL≤0.

09.

8. 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 sixth lens is f6, the on-axis thickness of the sixth lens is d11, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.33≤f6 / f≤1.35; 0.04≤d11 / TTL≤0.

13.

9. 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 seventh lens is f7, the central radius of curvature of the object side of the seventh lens is R13, the central radius of curvature of the image side of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -1.42≤f7 / f≤-0.45; -1.30≤(R13+R14) / (R13-R14)≤-0.35; 0.03≤d13 / TTL≤0.

12.

10. The camera optical lens according to claim 1, characterized in that, The first lens is made of glass.

Images