Camera lens

Abstract

The application discloses a camera optical lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens from the object side to the image side. The on-axis thicknesses of the first lens and the second lens are d1 and d3 respectively, the radii of curvature of the object side and the image side of the second lens are R3 and R4 respectively, the focal lengths of the third lens, the fourth lens, the sixth lens and the seventh lens are f3, f4, f6 and f7 respectively, the refractive index of the eighth lens is nd8, and the following relationships are satisfied: 1.00 <= d3 / d1 <= 3.00; 0.20 <= R3 / R4 <= 0.90; 1.00 <= f4 / f3 <= 4.00; 0.50 <= f6 / f7 <= 1.40; and 1.80 <= nd8 <= 2.20. The camera optical lens has good optical performance, and has the characteristics of large aperture and miniaturization.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of optical technology, in particular to a camera optical lens. BACKGROUND

[0002] Laser radar (light detection and ranging) is a radar system that detects the position, velocity and other characteristics of a target by emitting a laser beam, and is a system that integrates laser, global positioning system (GPS) and inertial navigation system (INS) technologies to obtain data and generate accurate digital elevation models (DEM). Its basic working principle is: the detection signal (laser beam) is transmitted to the target, and then the received signal (target echo) reflected by the target is compared with the transmitted signal, after appropriate processing, the related information of the target can be obtained, such as the distance, azimuth, height, speed, attitude, uniform shape and other parameters of the target, which can be used for detection, tracking and identification of targets including aircraft and missiles. The sensor emits tens of thousands or hundreds of thousands of laser pulses per second, when the light pulse is emitted, the timer starts, when the light pulse (reflected from the first person / object) returns, the timer stops, and by measuring the time of flight (TOF) of the light pulse, the distance between the sensor and the person / object is calculated.

[0003] Although the existing vehicle-mounted laser radar mounted lens has good optical performance, the setting of lens focal length and the like still has certain irrationality, so that the lens structure cannot meet the design requirements of large aperture and miniaturization while having good optical performance. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a camera optical lens which has good optical performance and can meet the design requirements of large aperture and miniaturization.

[0005] To solve the above technical problems, the present application provides a camera optical lens, which comprises, in order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, the radius of curvature of the object side surface of the second lens is R3, the radius of curvature of the image side surface of the second lens is R4, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, and the refractive index of the eighth lens is nd8, and the following relationships are satisfied:

[0006] 1.00≤d3 / d1≤3.00;

[0007] 0.20≤R3 / R4≤0.90;

[0008] 1.00≤f4 / f3≤4.00;

[0009] 0.50≤f6 / f7≤1.40;

[0010] 1.80≤nd8≤2.20.

[0011] Optionally, the focal length of the eighth lens is f8, the focal length of the camera optical lens is f, and the following relationship is satisfied:

[0012] |f8 / f|≤3.00.

[0013] Optionally, the field of view angle of the camera optical lens is FOV, the focal length of the camera optical lens is f, the image height of the camera optical lens is IH, and the following relationship is satisfied:

[0014] (FOV*f) / IH≥95.

[0015] Optionally, the following relationship is also satisfied:

[0016] (FOV*f) / IH≤125.

[0017] Optionally, the first lens has negative refractive power, and its image-side surface is concave at the paraxial position; the object-side curvature radius of the first lens is R1, the image-side curvature radius of the first lens is R2, the focal length of the first lens is f1, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0018] 0.44≤(R1+R2) / (R1-R2)≤5.87;

[0019] -7.27≤f1 / f≤-0.83;

[0020] 0.01≤d1 / TTL≤0.05.

[0021] Optionally, the second lens has positive refractive power, its object side surface is convex at the paraxial position, and its image side surface is concave at the paraxial position; the focal length of the second lens is f2, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0022] -34.47≤(R3+R4) / (R3-R4)≤-1.01;

[0023] 3.18≤f2 / f≤17.23;

[0024] 0.01≤d3 / TTL≤0.08.

[0025] Optionally, the third lens has positive refractive power, the object side surface is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface radius of curvature of the third lens is R5, the image side surface radius of curvature of the third lens is R6, the focal length of the camera optical lens is f, the on-axis thickness of the third lens is d5, the total track length of the camera optical lens is TTL, and the following relationships are met:

[0026] 0.01≤(R5+R6) / (R5-R6)≤0.62;

[0027] 0.47≤f3 / f≤2.47;

[0028] 0.03≤d5 / TTL≤0.22.

[0029] Optionally, the fourth lens has positive refractive power, the object side surface is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface radius of curvature of the fourth lens is R7, the image side surface radius of curvature of the fourth lens is R8, the focal length of the camera optical lens is f, the on-axis thickness of the fourth lens is d7, the total track length of the camera optical lens is TTL, and the following relationships are met:

[0030] -1.98≤(R7+R8) / (R7-R8)≤1.12;

[0031] 0.76≤f4 / f≤5.61;

[0032] 0.01≤d7 / TTL≤0.23.

[0033] Optionally, the fifth lens has negative refractive power, the object side surface is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface radius of curvature of the fifth lens is R9, the image side surface radius of curvature of the fifth lens is R10, the focal length of the fifth lens is f5, the focal length of the camera optical lens is f, the on-axis thickness of the fifth lens is d9, the total track length of the camera optical lens is TTL, and the following relationships are met:

[0034] -0.99≤(R9+R10) / (R9-R10)≤1.45;

[0035] -3.48≤f5 / f≤-0.45;

[0036] 0.00≤d9 / TTL≤0.28.

[0037] Optionally, the sixth lens has positive refractive power, and an object side surface thereof is convex at a paraxial region; a radius of curvature of the object side surface of the sixth lens is R11, a radius of curvature of an image side surface of the sixth lens is R12, a focal length of the camera optical lens is f, an on-axis thickness of the sixth lens is d11, and an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied:

[0038] -2.00≤(R11+R12) / (R11-R12)≤0.22;

[0039] 1.00≤f6 / f≤5.66;

[0040] 0.01≤d11 / TTL≤0.14.

[0041] Optionally, the seventh lens has positive refractive power, and an object side surface thereof is concave at a paraxial region; a radius of curvature of the object side surface of the seventh lens is R13, a radius of curvature of an image side surface of the seventh lens is R14, a focal length of the camera optical lens is f, an on-axis thickness of the seventh lens is d13, and an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied:

[0042] -11.16≤(R13+R14) / (R13-R14)≤-0.01;

[0043] 0.89≤f7 / f≤10.88;

[0044] 0.01≤d13 / TTL≤0.30.

[0045] Optionally, the eighth lens has negative refractive power, and an object side surface thereof is concave at a paraxial region; a radius of curvature of the object side surface of the eighth lens is R15, a radius of curvature of an image side surface of the eighth lens is R16, an on-axis thickness of the eighth lens is d15, and an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied:

[0046] -12.50≤(R15+R16) / (R15-R16)≤0.02;

[0047] 0.01≤d15 / TTL≤0.05.

[0048] Optionally, the first lens and / or the second lens and / or the third lens and / or the fourth lens and / or the fifth lens and / or the sixth lens and / or the seventh lens and / or the eighth lens is made of glass.

[0049] The camera lens has good optical performance, large aperture and small size, and is especially suitable for a mobile phone camera lens assembly, a WEB camera lens and a vehicle-mounted laser radar lens composed of a high-pixel CCD, CMOS or other camera element. BRIEF DESCRIPTION OF DRAWINGS

[0050] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are illustrative, but not restrictive, of the embodiments, wherein elements having the same reference number designates like elements throughout the various figures, unless otherwise expressly provided for in the patent claim(s), the figures do not limit the proportionality.

[0051] Figure 1 is a structural schematic diagram of a camera lens of a first embodiment of the present application;

[0052] Figure 2 is a field curvature and distortion schematic diagram of the camera lens shown in Figure 1

[0053] Figure 3 is a lateral chromatic aberration schematic diagram of the camera lens shown in Figure 1

[0054] Figure 4 is an axial aberration schematic diagram of the camera lens shown in Figure 1

[0055] Figure 5 is a structural schematic diagram of a camera lens of a second embodiment of the present application;

[0056] Figure 6 is a field curvature and distortion schematic diagram of the camera lens shown in Figure 5

[0057] Figure 7 Figure 5 is a lateral chromatic aberration schematic diagram of the camera lens shown in

[0058] Figure 8 Figure 5 is an axial aberration schematic diagram of the camera lens shown in

[0059] Figure 9 is a structural schematic diagram of a camera lens of a third embodiment of the present application;

[0060] Figure 10 is a field curvature and distortion schematic diagram of the camera lens shown in Figure 9

[0061] Figure 11 Figure 9 is a lateral chromatic aberration schematic diagram of the camera lens shown in ​​​​​​​​

[0062] Figure 12 is Figure 9 axial aberration diagram of the photographing optical lens shown in FIG. 1;

[0063] Figure 13 is a structural diagram of a photographing optical lens of a fourth embodiment of the present application;

[0064] Figure 14 is Figure 13 field curvature and distortion diagram of the photographing optical lens shown in FIG. 1;

[0065] Figure 15 is Figure 13 lateral chromatic aberration diagram of the photographing optical lens shown in FIG. 1;

[0066] Figure 16 is Figure 13 axial aberration diagram of the photographing optical lens shown in FIG. 1;

[0067] Figure 17 is a structural diagram of a photographing optical lens of a comparative embodiment of the present application;

[0068] Figure 18 is Figure 17 field curvature and distortion diagram of the photographing optical lens shown in FIG. 1;

[0069] Figure 19 is Figure 17 lateral chromatic aberration diagram of the photographing optical lens shown in FIG. 1;

[0070] Figure 20 is Figure 17 axial aberration diagram of the photographing optical lens shown in FIG. 1. DETAILED DESCRIPTION

[0071] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the 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.

[0072] In the embodiments of the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0073] In addition, the above-mentioned partial terms can be used to represent other meanings in addition to the orientation or positional relationship, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0074] In addition, the terms "mount", "set", "provided with", "open", "connect", "connect" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific type and structure can be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated device, element or component. Unless otherwise stated, the meaning of "multiple" is two or more.

[0076] Please refer to Figure 1 The present application provides a camera optical lens 10, 20, 30, 40, the camera optical lens 10, 20, 30, 40 includes in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. The on-axis thickness of the first lens L1 is d1, the on-axis thickness of the second lens L2 is d3, the radius of curvature of the object side surface of the second lens L2 is R3, the radius of curvature of the image side surface of the second lens L2 is R4, the focal length of the third lens L3 is f3, the focal length of the fourth lens L4 is f4, the focal length of the sixth lens L6 is f6, the focal length of the seventh lens L7 is f7, the refractive index of the eighth lens L8 is nd8, and the following relationships are satisfied:

[0077] 1.00≤d3 / d1≤3.00 (1)

[0078] 0.20≤R3 / R4≤0.90 (2)

[0079] 1.00≤f4 / f3≤4.00 (3)

[0080] 0.50≤f6 / f7≤1.40 (4)

[0081] 1.80≤nd8≤2.20 (5)

[0082] In conditional expression (1), the ratio of the on-axis thickness d3 of the second lens L2 to the on-axis thickness d1 of the first lens L1 is set in the range specified by conditional expression (1), which helps to compress the total track length TTL of the photographing optical lens 10, 20, 30, 40, and is conducive to the miniaturization of the photographing optical lens 10, 20, 30, 40.

[0083] Conditional expression (2) specifies the shape of the second lens L2. In the range specified by conditional expression (2), the degree of deflection of light rays after passing through the second lens L2 can be moderated, and chromatic aberration can be effectively corrected, so that the chromatic aberration |LC|≤6.0 microns.

[0084] Conditional expression (3) specifies the ratio of the focal length f4 of the fourth lens L4 to the focal length f3 of the third lens L3. By setting the ratio in the range specified by conditional expression (3), the focal length of the photographing optical lens 10, 20, 30, 40 is reasonably distributed, so that the photographing optical lens 10, 20, 30, 40 has better imaging quality and lower sensitivity.

[0085] Conditional expression (4) specifies the ratio of the focal length f6 of the sixth lens L6 to the focal length f7 of the seventh lens L7. As can be seen from the range defined by conditional expression (4), the focal length f6 of the sixth lens L6 and the focal length f7 of the seventh lens L7 are relatively close, which helps to make the light rays pass through the sixth lens L6 and the seventh lens L7 smoothly, and improve the imaging quality of the photographing optical lens 10, 20, 30, 40.

[0086] Conditional expression (5) specifies the refractive index nd8 of the eighth lens L8. As can be seen, the eighth lens L8 is made of a material with a relatively high refractive index, which is conducive to reducing the image side aperture of the photographing optical lens 10, 20, 30, 40 and improving the imaging quality of the photographing optical lens 10, 20, 30, 40.

[0087] In the present application, by setting multiple lenses (L1, L2, L3, L4, L5, L6, L7, L8), and setting the ratio of the thickness d3 of the second lens L2 and the thickness d1 of the first lens L1, the shape of the second lens L2, the ratio of the focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4, the ratio of the focal length f6 of the sixth lens L6 and the focal length f7 of the seventh lens L7, and the refractive index nd8 of the eighth lens L8, so that the imaging optical lens 10, 20, 30, 40 has good optical performance, and has the characteristics of large aperture and miniaturization, especially suitable for mobile phone imaging lens assembly, WEB imaging lens and vehicle-mounted laser radar lens composed of high-pixel CCD, CMOS and other imaging elements.

[0088] Preferably, the focal length of the eighth lens L8 is f8, the focal length of the imaging optical lens 10, 20, 30, 40 is f, and the following relationship is satisfied:

[0089] |f8 / f|≤3.00 (6)

[0090] The conditional expression (6) specifies the focal length f8 of the eighth lens L8. It can be seen that the focal length f8 of the eighth lens L8 is shorter, which helps to improve the light collecting ability of the imaging optical lens 10, 20, 30, 40, ensures the light flux, can make the chief ray angle (CRA, Chief Ray Angle) smaller, and improves the relative luminance of the imaging optical lens 10, 20, 30, 40.

[0091] Preferably, the field of view of the imaging optical lens 10, 20, 30, 40 is FOV, the focal length of the imaging optical lens 10, 20, 30, 40 is f, and the image height of the imaging optical lens 10, 20, 30, 40 is IH, and the following relationship is satisfied:

[0092] (FOV*f) / IH≥95 (7)

[0093] Within the range specified by the conditional expression (7), the imaging optical lens 10, 20, 30, 40 can consider the field of view and the long focal length, and realize the imaging of medium and long distance.

[0094] More preferably, the imaging optical lens 10, 20, 30, 40 also satisfies the following relationship:

[0095] (FOV*f) / IH≤125 (8)

[0096] In the present application, the object side surface of the first lens L1 is concave at the paraxial region, the image side surface of the first lens L1 is concave at the paraxial region, and the first lens L1 has a negative refractive power. In other alternative embodiments, the first lens L1 can also have a positive refractive power, and the object side surface and the image side surface of the first lens L1 can also be provided with other concave or convex distribution conditions.

[0097] Preferably, the radius of curvature of the object side surface of the first lens L1 is R1, the radius of curvature of the image side surface of the first lens L1 is R2, the focal length of the first lens L1 is f1, the focal length of the camera optical lens 10, 20, 30, 40 is f, and the total optical length of the camera optical lens 10, 20, 30, 40 is TTL, and the following relationship is satisfied:

[0098] 0.44≤(R1+R2) / (R1-R2)≤5.87 (9)

[0099] -7.27≤f1 / f≤-0.83 (10)

[0100] 0.01≤d1 / TTL≤0.05 (11)

[0101] The condition formula (9) defines the shape of the first lens L1, and within the range defined by the condition formula, it is helpful to improve the imaging quality of the camera optical lens 10, 20, 30, 40, and more preferably, 0.70≤(R1+R2) / (R1-R2)≤4.70. The condition formula (10) defines the ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens, and within the range, it is helpful to improve the optical performance of the camera optical lens 10, 20, 30, 40, and more preferably, -4.55≤f1 / f≤-1.04. The condition formula (11) defines the ratio of the on-axis thickness d1 of the first lens L1 to the total optical length TTL of the camera optical lens 10, 20, 30, 40, and within the range defined by the condition formula, it is beneficial to realize the ultra-thin design of the camera optical lens 10, 20, 30, 40, and more preferably, 0.01≤d1 / TTL≤0.04.

[0102] In the present application, the object side surface of the second lens L2 is convex at the paraxial region, the image side surface of the second lens L2 is concave at the paraxial region, and the second lens L2 has a positive 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 or convex distribution conditions, and the second lens L2 can also have a negative refractive power.

[0103] Preferably, the focal length of the second lens L2 is f2, the focal length of the camera optical lens is f, and the total optical length of the camera optical lens 10, 20, 30, 40 is TTL, and the following relationship is satisfied:

[0104] -34.47 ≤ (R3 + R4) / (R3 - R4) ≤ -1.01 (12)

[0105] 3.18 ≤ f2 / f ≤ 17.23 (13)

[0106] 0.01 ≤ d3 / TTL ≤ 0.08 (14)

[0107] Condition formula (12) defines the shape of the second lens L2, in the range defined by the condition formula, it is beneficial to correct the on-axis chromatic aberration and other problems of the photographing optical lens 10, 20, 30, 40, more preferably, -21.54 ≤ (R3 + R4) / (R3 - R4) ≤ -1.26. Condition formula (13) defines the ratio range of the focal length f2 of the second lens L2 and the focal length f of the photographing optical lens 10, 20, 30, 40, in this range, the second lens L2 has appropriate positive refractive power, which is beneficial to the ultra-thin and wide-angle design of the photographing optical lens 10, 20, 30, 40, more preferably, 5.09 ≤ f2 / f ≤ 13.78. Condition formula (14) defines the ratio of the on-axis thickness d3 of the second lens L2 and the total optical length TTL of the photographing optical lens 10, 20, 30, 40, in this range, it is beneficial to realize the ultra-thin design of the photographing optical lens 10, 20, 30, 40, more preferably, 0.02 ≤ d3 / TTL ≤ 0.07.

[0108] In the present application, the object side of the third lens L3 is convex at the near axis, the image side is convex at the near axis, and the third lens L3 has positive refractive power. 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, and the third lens L3 can also have negative refractive power.

[0109] Preferably, the object side curvature radius of the third lens L3 is R5, the image side curvature radius of the third lens L3 is R6, the focal length of the photographing optical lens 10, 20, 30, 40 is f, the on-axis thickness of the third lens L3 is d5, and the total optical length of the photographing optical lens 10, 20, 30, 40 is TTL, and the following relationship is satisfied:

[0110] 0.01 ≤ (R5 + R6) / (R5 - R6) ≤ 0.62 (15)

[0111] 0.47 ≤ f3 / f ≤ 2.47 (16)

[0112] 0.03 ≤ d5 / TTL ≤ 0.22 (17)

[0113] The conditional expression (15) defines the shape of the third lens L3, and within the defined range of the conditional expression, the imaging quality is improved, and more preferably, 0.02≤(R5+R6) / (R5-R6)≤0.49. The conditional expression (16) defines the ratio range of the focal length f3 of the third lens L3 to the focal length f of the photographing optical lens 10, 20, 30, 40, and within the range, the aberration is reduced, and more preferably, 0.75≤f3 / f≤1.97. The conditional expression (17) defines the ratio range of the on-axis thickness d5 of the third lens L3 to the total optical length TTL of the photographing optical lens 10, 20, 30, 40, and within the range, the ultra-thin design of the photographing optical lens 10, 20, 30, 40 is facilitated, and more preferably, 0.05≤d5 / TTL≤0.17.

[0114] In the present application, 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 convex at the paraxial region, and the fourth lens L4 has a positive 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 or convex distributions, and the fourth lens L4 can also have a negative refractive power.

[0115] Preferably, the object side surface of the fourth lens L4 has a curvature radius R7, the image side surface of the fourth lens L4 has a curvature radius R8, the photographing optical lens 10, 20, 30, 40 has a focal length f, the fourth lens L4 has an on-axis thickness d7, and the photographing optical lens 10, 20, 30, 40 has a total optical length TTL, and the following relationships are satisfied:

[0116] -1.98≤(R7+R8) / (R7-R8)≤1.12 (18)

[0117] 0.76≤f4 / f≤5.61 (19)

[0118] 0.01≤d7 / TTL≤0.23 (20)

[0119] The conditional expression (18) defines the shape of the fourth lens L4, in the range, as the camera optical lens 10, 20, 30, 40 develops towards ultra-thin wide-angle, it is beneficial to correct the problem of on-axis chromatic aberration, more preferably, -1.24≤(R7+R8) / (R7-R8)≤0.89. The conditional expression (19) defines the ratio range of the focal length f4 of the fourth lens L4 and the focal length f of the camera optical lens 10, 20, 30, 40, in the range defined by the conditional expression, it is helpful to reduce aberration and improve imaging quality, more preferably, 1.22≤f4 / f≤4.49. The conditional expression (20) defines the ratio of the on-axis thickness d7 of the fourth lens L4 and the total optical length TTL of the camera optical lens 10, 20, 30, 40, in the range, it is helpful to realize the ultra-thin design of the camera optical lens 10, 20, 30, 40, more preferably, 0.01≤d7 / TTL≤0.19.

[0120] In the present application, the object side surface of the fifth lens L5 is concave at the near axis, the image side surface of the fifth lens L5 is concave at the near axis, and the fifth lens L5 has a 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 a positive refractive power.

[0121] Preferably, the object side surface of the fifth lens L5 has a curvature radius R9, the image side surface of the fifth lens L5 has a curvature radius R10, the focal length of the fifth lens L5 is f5, the focal length of the camera optical lens 10, 20, 30, 40 is f, the on-axis thickness of the fifth lens L5 is d9, and the total optical length of the camera optical lens 10, 20, 30, 40 is TTL, and the following relationships are satisfied:

[0122] -0.99≤(R9+R10) / (R9-R10)≤1.45 (21)

[0123] -3.48≤f5 / f≤-0.45 (22)

[0124] 0.00≤d9 / TTL≤0.28 (23)

[0125] The conditional expression (21) defines the shape of the fifth lens L5, within the range of the conditional expression, so that the fifth lens L5 can effectively correct the spherical aberration of the photographing optical lens 10, 20, 30, 40, and more preferably, -0.62≤(R9+R10) / (R9-R10)≤1.16. The conditional expression (22) defines the ratio of the focal length f5 of the fifth lens L5 and the focal length f of the photographing optical lens 10, 20, 30, 40, within the range, which is conducive to improving the optical performance of the photographing optical lens 10, 20, 30, 40, and more preferably, -2.17≤f5 / f≤-0.56. The conditional expression (23) defines the ratio of the on-axis thickness d9 of the fifth lens L5 and the total optical length TTL of the photographing optical lens 10, 20, 30, 40, within the range of the conditional expression, which is conducive to compressing the total optical length TTL of the photographing optical lens 10, 20, 30, 40, and more preferably, 0.01≤d9 / TTL≤0.22.

[0126] In the present application, the object side surface of the sixth lens L6 is convex at the near axis, the image side surface of the sixth lens L6 is convex at the near axis, and the sixth lens L6 has positive refractive power. In other alternative embodiments, the sixth lens L6 can also have negative refractive power, and the object side surface and the image side surface of the sixth lens L6 can also be provided in other concave or convex distribution.

[0127] Preferably, the object side surface of the sixth lens L6 has a curvature radius R11, the image side surface of the sixth lens L6 has a curvature radius R12, the focal length of the photographing optical lens 10, 20, 30, 40 is f, the on-axis thickness of the sixth lens L6 is d11, and the total optical length of the photographing optical lens 10, 20, 30, 40 is TTL, and the following relationships are satisfied:

[0128] -2.00≤(R11+R12) / (R11-R12)≤0.22 (24)

[0129] 1.00≤f6 / f≤5.66 (25)

[0130] 0.01≤d11 / TTL≤0.14 (26)

[0131] The conditional expression (24) defines the shape of the sixth lens L6. Within the range of the conditional expression, the degree of deflection of light passing through the lens can be mitigated, and aberration can be effectively reduced. More preferably, -1.25≤(R11+R12) / (R11-R12)≤0.17. The conditional expression (25) defines the ratio of the focal length f6 of the sixth lens L6 to the focal length f of the photographing optical lens 10, 20, 30, 40. Within the range of the conditional expression, aberration can be reduced, and imaging quality can be improved. More preferably, 1.61≤f6 / f≤4.53. The conditional expression (26) defines the ratio of the on-axis thickness d11 of the sixth lens L6 to the total optical length TTL of the photographing optical lens 10, 20, 30, 40. Within the range of the conditional expression, the total optical length TTL of the photographing optical lens 10, 20, 30, 40 can be compressed, and the photographing optical lens 10, 20, 30, 40 can be designed to be ultra-thin. More preferably, 0.02≤d11 / TTL≤0.11.

[0132] In the present application, the object side surface of the seventh lens L7 is convex at the paraxial region, the image side surface of the seventh lens L7 is convex at the paraxial region, and the seventh lens L7 has positive refractive power. In other alternative embodiments, the seventh lens L7 can also have negative refractive power, and the object side surface and the image side surface of the seventh lens L7 can also be provided in other concave-convex distribution.

[0133] Preferably, the object side surface of the seventh lens L7 has a curvature radius R13, the image side surface of the seventh lens L7 has a curvature radius R14, the photographing optical lens 10, 20, 30, 40 has a focal length f, the seventh lens L7 has an on-axis thickness d13, and the photographing optical lens 10, 20, 30, 40 has a total optical length TTL, and the following relationships are satisfied:

[0134] -11.16≤(R13+R14) / (R13-R14)≤-0.01 (27)

[0135] 0.89≤f7 / f≤10.88 (28)

[0136] 0.01≤d13 / TTL≤0.30 (29)

[0137] The conditional expression (27) defines the shape of the seventh lens L7, and within the range, it helps to reduce the degree of deflection of light passing through the seventh lens L7, effectively reduces aberration, and more preferably, -6.98≤(R13+R14) / (R13-R14)≤-0.01. The conditional expression (28) defines the ratio range of the focal length f7 of the seventh lens L7 to the focal length f of the photographing optical lens 10, 20, 30, 40, and within the range, it helps to improve the optical performance of the photographing optical lens 10, 20, 30, 40, and more preferably, 1.43≤f7 / f≤8.71. The conditional expression (29) defines the ratio of the on-axis thickness d13 of the seventh lens L7 to the total optical length TTL of the photographing optical lens 10, 20, 30, 40, and within the range defined by the conditional expression, it helps to achieve the ultra-thin design of the photographing optical lens 10, 20, 30, 40, and more preferably, 0.02≤d13 / TTL≤0.24.

[0138] In the present application, the object side of the eighth lens L8 is concave at the near axis, the image side is concave at the near axis, and the eighth lens L8 has a negative refractive power. In other optional embodiments, the eighth lens L8 can also have a positive refractive power, and the object side and image side of the eighth lens L8 can also be provided in other concave and convex distribution conditions.

[0139] Preferably, the object side of the eighth lens L8 has a curvature radius R15, the image side of the eighth lens L8 has a curvature radius R16, the on-axis thickness of the eighth lens L8 is d15, the total optical length of the photographing optical lens 10, 20, 30, 40 is TTL, and the following relationship is satisfied:

[0140] -12.5≤(R15+R16) / (R15-R16)≤0.02 (30)

[0141] 0.01≤d15 / TTL≤0.05 (31)

[0142] The conditional expression (30) defines the shape of the eighth lens L8, and within the range defined by the conditional expression, when the photographing optical lens 10, 20, 30, 40 develops towards ultra-thin wide-angle, it helps to correct the on-axis chromatic aberration, and more preferably, -7.81≤(R15+R16) / (R15-R16)≤0.01. The conditional expression (31) defines the ratio of the on-axis thickness d15 of the eighth lens L8 to the total optical length TTL of the photographing optical lens 10, 20, 30, 40, and within the range, it helps to reasonably control the total optical length TTL of the photographing optical lens 10, 20, 30, 40, and more preferably, 0.01≤d15 / TTL≤0.04.

[0143] Preferably, the F number FNO of the photographing optical lens 10, 20, 30, 40 satisfies the following relationship:

[0144] FNO≤1.65 (32)

[0145] The conditional expression (32) defines the F number of the aperture of the photographing optical lens 10, 20, 30, 40. Within the range defined by the conditional expression (32), a greater light amount can be achieved while the photographing optical lens 10, 20, 30, 40 is designed to be small in size.

[0146] In the present application, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are all made of glass. In other optional embodiments, each lens can also be made of other materials.

[0147] Preferably, the first lens L1 is a spherical lens, the second lens L2 is a spherical lens, the third lens L3 is an aspherical lens, the fourth lens L4 is a spherical lens, the fifth lens L5 is a spherical lens, the sixth lens L6 is an aspherical lens, the seventh lens L7 is a spherical lens, and the eighth lens L8 is a spherical lens.

[0148] In the present application, an optical filter GF or other optical element is arranged between the eighth lens L8 and the imaging surface Si, wherein the optical filter GF can be a glass cover plate or an optical filter (filter). Figure 1 As shown in FIG. 1, the optical filter GF is arranged between the eighth lens L8 and the imaging surface Si. In other embodiments, the optical filter GF can also be arranged at other positions.

[0149] The photographing optical lens 10, 20, 30, 40 of the present application has good optical performance and has the characteristics of large aperture and small size, and is especially suitable for mobile phone camera lens assemblies, WEB camera lenses and vehicle-mounted laser radar lenses composed of high-pixel CCD, CMOS and other photographing elements.

[0150] The photographing optical lens 10, 20, 30, 40 of the present application will be described below by examples. The symbols recorded in each example are shown in Table 【1】, and the units of focal length, on-axis distance, radius of curvature, on-axis thickness, inflection point position and stationary point position are millimeters.

[0151] TTL: total optical length (on-axis distance from the object side of the first lens L1 to the imaging surface Si), unit: millimeter. Preferably, the object side and / or the image side of the lens can also be provided with an inflection point and / or a stationary point to meet the high-quality imaging requirements. For specific implementation schemes, please refer to the following content. Figure 1is a structural schematic diagram of the photographing optical lens 10 in the first embodiment. The design data of the photographing optical lens 10 in the first embodiment of the present application is shown as follows. Table 1 lists the radius of curvature R, the on-axis thickness of the lens, the on-axis distance d between lenses, the refractive index nd and the Abbe number vd of the object side and the image side of the first lens L1 to the eighth lens L8 constituting the photographing optical lens 10 in the first embodiment of the present application. Table 2 shows the conic coefficient k and the aspheric coefficient of the photographing optical lens 10. It should be noted that in the present embodiment, the units of distance, radius and thickness are all millimeters (mm).

Table 1

[0152] R4: the radius of curvature of the image side of the second lens L2;

[0153] R5: the radius of curvature of the object side of the third lens L3;

[0154] R6: the radius of curvature of the image side of the third lens L3;

[0155] R7: the radius of curvature of the object side of the fourth lens L4;

[0156] R8: the radius of curvature of the image side of the fourth lens L4;

[0157] R9: the radius of curvature of the object side of the fifth lens L5;

[0158] R10: the radius of curvature of the image side of the fifth lens L5;

[0159] R11: the radius of curvature of the object side of the sixth lens L6;

[0160] R12: the radius of curvature of the image side of the sixth lens L6;

[0161] R13: the radius of curvature of the object side of the seventh lens L7;

[0162] R14: the radius of curvature of the image side of the seventh lens L7;

[0163] R15: the radius of curvature of the object side of the eighth lens L8;

[0164] R16: the radius of curvature of the image side of the eighth lens L8;

[0165] R17: radius of curvature of the object side surface of the optical filter GF;

[0166] R18: radius of curvature of the image side surface of the optical filter GF;

[0167] d: on-axis thickness of a lens or on-axis distance between adjacent lenses;

[0168] do: on-axis distance from the stop S1 to the object side surface of the first lens L1;

[0169] d1: on-axis thickness of the first lens L1;

[0170] d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0171] d3: on-axis thickness of the second lens L2;

[0172] d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0173] d5: on-axis thickness of the third lens L3;

[0174] d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0175] d7: on-axis thickness of the fourth lens L4;

[0176] d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0177] d9: on-axis thickness of the fifth lens L5;

[0178] d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0179] d11: on-axis thickness of the sixth lens L6;

[0180] d12: on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

[0181] d13: on-axis thickness of the seventh lens L7;

[0182] d14: on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the eighth lens L8; d15: on-axis thickness of the eighth lens L8;

[0183] d16: on-axis distance from the image side surface of the eighth lens L8 to the object side surface of the optical filter GF; d17: on-axis thickness of the optical filter GF;

[0184] d18: on-axis distance from the image side surface of the optical filter GF to the image plane Si;

[0185] nd: refractive index of the d line (the d line is green light having a wavelength of 550 nm);

[0186] nd1: refractive index of the first lens L1;

[0187] nd2: refractive index of the second lens L2;

[0188] nd3: refractive index of the third lens L3;

[0189] nd4: refractive index of the fourth lens L4;

[0190] nd5: refractive index of the fifth lens L5;

[0191] nd6: refractive index of the sixth lens L6;

[0192] nd7: refractive index of the seventh lens L7;

[0193] nd8: refractive index of the eighth lens L8;

[0194] ndg: refractive index of the optical filter GF;

[0195] vd: Abbe number;

[0196] vd1: Abbe number of the first lens L1;

[0197] vd2: Abbe number of the second lens L2;

[0198] vd3: Abbe number of the third lens L3;

[0199] vd4: Abbe number of the fourth lens L4;

[0200] vd5: Abbe number of the fifth lens L5;

[0201] vd6: Abbe number of the sixth lens L6;

[0202] vd7: Abbe number of the seventh lens L7;

[0203] vd8: Abbe number of the eighth lens L8;

[0204] vg: Abbe number of the optical filter GF.

[0205]

Table 2

[0206]

[0207]

[0208] Note that the aspheric surface of each lens in this embodiment uses an aspheric surface represented by the following conditional expression (33), but the specific form of the following conditional expression (33) is only one example, and in fact, the present application is not limited to the aspheric polynomial form represented in conditional expression (33).

[0209] z = (c 2 / r) / {1+[1-(k+1)(c 2 / r 2 ) 1 / 2}+A4c 4 +A6c 6 +A8c 8 +A10c 10 +A12c 12 +A14c 14 +A16c 16 +

[0210] A18c 18 +A20c 20 (33)

[0211] where k is a conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients. c is the curvature at the center of the optical surface, r is the perpendicular distance of a point on the aspheric curve from the optical axis, and z is the aspheric depth (the perpendicular distance between the point on the aspheric curve at a distance r from the optical axis and the tangent plane at the vertex of the aspheric surface).

[0212] Tables 3 and 4 show the design data of the inflection points and the stationary points of each lens in the imaging optical lens 10 according to the embodiments 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, P6R1 and P6R2 represent the object side surface and the image side surface of the sixth lens L6, respectively, P7R1 and P7R2 represent the object side surface and the image side surface of the seventh lens L7, respectively, and P8R1 and P8R2 represent the object side surface and the image side surface of the eighth lens L8, respectively. The data in the "Inflection Point Position" column is the perpendicular distance from the optical axis of the imaging optical lens 10 to the inflection point provided on the surface of each lens. The data in the "Stationary Point Position" column is the perpendicular distance from the optical axis of the imaging optical lens 10 to the stationary point provided on the surface of each lens.

[0213]

Table 3

[0214] Number of inflection points Inflection point position 1 Inflection point position 2 P1R1 / / / P1R2 / / / P2R1 / / / P2R2 / / / P3R1 2 4.405 5.445 P3R2 / / / P4R1 / / / P4R2 / / / P5R1 / / / P5R2 / / / P6R1 / / / P6R2 1 4.915 / P7R1 / / / P7R2 / / / P8R1 / / / P8R2 / / /

[0215]

Table 4

[0216]

[0217]

[0218] In addition, the following Table 21 also lists the values ​​corresponding to the various parameters in the first embodiment and the parameters specified in the conditional expressions.

[0219] Figure 2 Schematic diagram showing field curvature and distortion of light with a wavelength of 555 nanometers after passing through the camera optical lens 10 of the first embodiment; Figure 3 Schematic diagram of magnification chromatic aberration after wavelengths of 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm pass through the camera optical lens 10 of the first embodiment; Figure 4 Schematic diagram of axial aberrations of wavelengths 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the imaging optical lens 10 of the first embodiment is shown.

[0220] As shown in Table 21, the first embodiment satisfies each conditional expression.

[0221] In this embodiment, the entrance pupil diameter of the camera optical lens 10 is 3.613 mm, the full field of view image height is 5.139 mm, and the diagonal field of view is 107.40°. The camera optical lens 10 meets the design requirements of large aperture and miniaturization, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical performance.

[0222] Second embodiment:

[0223] Figure 5 2 is a schematic structural diagram of the camera optical lens 20 in the second embodiment. The second embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those in the first embodiment. Only the differences are listed below.

[0224] In this embodiment, the image-side surface of the seventh lens L7 is concave at the paraxial direction, and the image-side surface of the eighth lens L8 is convex at the paraxial direction.

[0225] Tables 5 and 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0226]

Table 5

[0227]

[0228]

[0229]

Table 6

[0230]

[0231] Table 7, Table 8 show the inflection point and the design data of the stop point of each lens in the camera optical lens 20 of the second embodiment of the present application.

[0232]

Table 7

[0233] Number of inflection points Inflection point position 1 P1R1 / / P1R2 / / P2R1 / / P2R2 / / P3R1 1 3.055 P3R2 / / P4R1 / / P4R2 / / P5R1 / / P5R2 / / P6R1 / / P6R2 1 1.355 P7R1 / / P7R2 / / P8R1 / / P8R2 / /

[0234]

Table 8

[0235]

[0236]

[0237] In addition, in the subsequent Table 21, the values corresponding to the parameters specified in the various conditional expressions in the second embodiment are also listed.

[0238] Figure 6 The field curvature and distortion diagram of the light with a wavelength of 555 nm after passing through the camera optical lens 20 of the second embodiment is shown; Figure 7 The lateral chromatic aberration diagram of the light with a wavelength of 470 nm, 510 nm, 555 nm, 610 nm, 650 nm after passing through the camera optical lens 20 of the second embodiment is shown; Figure 8 The axial aberration diagram of the light with a wavelength of 470 nm, 510 nm, 555 nm, 610 nm, 650 nm after passing through the camera optical lens 20 of the second embodiment is shown.

[0239] As shown in Table 21, the second embodiment satisfies each conditional expression.

[0240] In the present embodiment, the entrance pupil diameter of the camera optical lens 20 is 4.675 mm, the full field image height is 5.139 mm, the diagonal field of view is 77.60°, the camera optical lens 20 satisfies the design requirements of large aperture and miniaturization, the on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical performance.

[0241] Third Embodiment:

[0242] Figure 9 is a structure diagram of the camera optical lens 30 in the third embodiment, the third embodiment is basically the same as the first embodiment, the symbol meanings are the same as the first embodiment, and only the different points are listed below.

[0243] In the present embodiment, the object side surface of the first lens L1 is convex at the near axis, the image side surface of the sixth lens L6 is concave at the near axis, the image side surface of the seventh lens L7 is concave at the near axis, and the image side surface of the eighth lens L8 is convex at the near axis.

[0244] Table 9, Table 10 show the design data of the photographing optical lens 30 of the third embodiment of the present application.

[0245]

Table 9

[0246]

[0247]

[0248]

Table 10

[0249]

[0250] Table 11, Table 12 show the inflection point and the stationary point design data of each lens in the photographing optical lens 30 of the third embodiment of the present application.

[0251]

Table 11

[0252] Number of inflection points Inflection point position 1 P1R1 / / P1R2 / / P2R1 / / P2R2 / / P3R1 / / P3R2 1 4.435 P4R1 / / P4R2 / / P5R1 / / P5R2 / / P6R1 / / P6R2 / / P7R1 / / P7R2 / / P8R1 / / P8R2 / /

[0253]

Table 12

[0254] Number of stationary points P1R1 / P1R2 / P2R1 / P2R2 / P3R1 / P3R2 / P4R1 / P4R2 / P5R1 / P5R1 / P6R2 / P6R1 / P7R1 / P7R2 / P8R1 / P8R2 /

[0255] In addition, in the subsequent Table 21, the values corresponding to the parameters defined in the various parameter and conditional expressions in the third embodiment are also listed.

[0256] Figure 10 The field curvature and distortion diagram of the light with a wavelength of 555 nm after passing through the photographing optical lens 30 of the third embodiment is shown; Figure 11 The lateral chromatic aberration diagram of the light with a wavelength of 470 nm, 510 nm, 555 nm, 610 nm, 650 nm after passing through the photographing optical lens 30 of the third embodiment is shown; Figure 12 The axial chromatic aberration diagram of the light with a wavelength of 470 nm, 510 nm, 555 nm, 610 nm, 650 nm after passing through the photographing optical lens 30 of the third embodiment is shown.

[0257] As shown in Table 21, the third embodiment satisfies each conditional expression.

[0258] In the present embodiment, the entrance pupil diameter of the photographing optical lens 30 is 4.482 mm, the full field image height is 5.139 mm, the diagonal field of view is 72.88°, the photographing optical lens 30 satisfies the design requirements of large aperture and miniaturization, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical performance.

[0259] Fourth Embodiment:

[0260] Figure 13is a structural diagram of the imaging optical lens 40 in the fourth embodiment, which is basically the same as the first embodiment, and the symbol meanings are the same as those in the first embodiment. Only the different points are listed below.

[0261] In the present embodiment, the object side surface of the first lens L1 is convex at the paraxial region, the image side surface of the seventh lens L7 is concave at the paraxial region, and the image side surface of the eighth lens L8 is convex at the paraxial region.

[0262] Tables 13 and 14 show the design data of the imaging optical lens 40 in the fourth embodiment of the present application.

[0263]

Table 13

[0264]

[0265]

[0266]

Table 14

[0267]

[0268] Tables 15 and 16 show the inflection point and the stationary point design data of each lens in the imaging optical lens 40 in the fourth embodiment of the present application.

[0269]

Table 15

[0270] Number of inflection points Inflection point position 1 P1R1 / / P1R2 / / P2R1 / / P2R2 / / P3R1 1 4.165 P3R2 / / P4R1 / / P4R2 / / P5R1 / / P5R2 / / P6R1 / / P6R2 1 0.315 P7R1 / / P7R2 / / P8R1 / / P8R2 / /

[0271]

Table 16

[0272] Number of stationary points Stationary point position 1 P1R1 / / P1R2 / / P2R1 / / P2R2 / / P3R1 / / P3R2 / / P4R1 / / P4R2 / / P5R1 / / P5R2 / / P6R1 / / P6R2 1 0.545 P7R1 / / P7R2 / / P8R1 / / P8R2 / /

[0273] In addition, in the subsequent Table 21, the values corresponding to the parameters specified in the various parameter and condition formulas in the fourth embodiment are also listed.

[0274] Figure 14 The field curvature and distortion diagrams of light with a wavelength of 555 nm after passing through the imaging optical lens 40 in the fourth embodiment are shown; Figure 15 The lateral chromatic aberration diagrams of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm after passing through the imaging optical lens 40 in the fourth embodiment are shown; Figure 16 The axial chromatic aberration diagrams of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm after passing through the imaging optical lens 40 in the fourth embodiment are shown.

[0275] As shown in Table 21, the fourth embodiment satisfies each condition formula.

[0276] In this embodiment, the entrance pupil diameter of the camera optical lens 40 is 6.915 mm, the full field of view image height is 5.139 mm, and the diagonal field of view is 43.13°. The camera optical lens 40 meets the design requirements of large aperture and miniaturization, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical performance.

[0277] Comparative implementation method:

[0278] Figure 17 3 is a structural diagram of the camera optical lens 50 in a comparative embodiment. The meanings of the symbols in the comparative embodiment are the same as those in the first embodiment, and only the differences are listed below.

[0279] Tables 17 and 18 show the design data of the imaging optical lens 50 according to the comparative embodiment.

[0280] Table 17

[0281]

[0282]

Table 18

[0283]

[0284]

[0285] Tables 19 and 20 show the inflection point and stagnation point design data of each lens in the imaging optical lens 50 of the comparative embodiment.

[0286] Table 19

[0287]

[0288]

[0289] Table 20

[0290] Number of stationary points Stationary point position P1R1 / / P1R2 / / P2R1 / / P2R2 / / P3R1 1 3.995 P3R2 / / P4R1 / / P4R2 / / P5R1 / / P5R2 / / P6R1 / / P6R2 / / P7R1 / / P7R2 / / P8R1 / / P8R2 / /

[0291] Figure 18 Schematic diagram showing field curvature and distortion of light with a wavelength of 555 nanometers after passing through the camera optical lens 50 of the comparative embodiment; Figure 19 A schematic diagram of magnification chromatic aberration at wavelengths of 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm after passing through the camera optical lens 50 of a comparative embodiment is shown; Figure 20 A schematic diagram of axial aberrations after the camera optical lens 50 of the comparative embodiment is shown at wavelengths of 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm.

[0292] In the following Table 21, the values of the parameters in the comparative embodiment corresponding to the parameters defined in the conditional expression are also listed. Obviously, the imaging optical lens 50 in the comparative embodiment does not satisfy the conditional expression 0.20≤R3 / R4≤0.90.

[0293] In the comparative embodiment, the entrance pupil diameter of the imaging optical lens 50 is 6.283 mm, the full field of view image height is 5.139 mm, the diagonal field of view is 54.89°, and the imaging optical lens 50 does not have excellent optical performance, and the on-axis and off-axis chromatic aberration is not fully corrected.

[0294]

Table 21

[0295]

[0296] The imaging optical lens provided by the embodiments of the present application is described in detail above, and the principles and embodiments of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the idea of the present application, and there will be changes in the specific embodiments and application scope. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A camera optical lens characterized in that, The camera optical lens has eight lenses, which include, from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; the first lens has negative refractive power, and an image-side surface thereof is concave at a near-axial portion; the second lens has positive refractive power, an object-side surface thereof is convex at a near-axial portion, and an image-side surface thereof is concave at a near-axial portion; the third lens has positive refractive power, an object-side surface thereof is convex at a near-axial portion, and an image-side surface thereof is convex at a near-axial portion; the fourth lens has positive refractive power, an object-side surface thereof is convex at a near-axial portion, and an image-side surface thereof is convex at a near-axial portion; the fifth lens has negative refractive power, an object-side surface thereof is concave at a near-axial portion, and an image-side surface thereof is concave at a near-axial portion; the sixth lens has positive refractive power, an object-side surface thereof is convex at a near-axial portion; the seventh lens has positive refractive power, an object-side surface thereof is convex at a near-axial portion; and the eighth lens has negative refractive power, an object-side surface thereof is concave at a near-axial portion; an on-axis thickness of the first lens is d1, an on-axis thickness of the second lens is d3, a curvature radius of an object-side surface of the second lens is R3, a curvature radius of an image-side surface of the second lens is R4, a focal length of the third lens is f3, a focal length of the fourth lens is f4, a focal length of the sixth lens is f6, a focal length of the seventh lens is f7, a refractive index of the eighth lens is nd8, and the following relationships are satisfied: 1.00≤d3 / d1≤3.00; 0.20≤R3 / R4≤0.90; 1.00≤f4 / f3≤4.00; 0.50≤f6 / f7≤1.40; 1.80≤nd8≤2.

20.

2. The camera optical lens according to claim 1, wherein, A focal length of the eighth lens is f8, a focal length of the camera optical lens is f, and the following relationship is satisfied: |f8 / f|≤3.

00.

3. The camera optical lens according to claim 1, wherein, A field of view of the camera optical lens is FOV, a focal length of the camera optical lens is f, and an image height of the camera optical lens is IH, and the following relationship is satisfied: (FOV*f) / IH≥95.

4. The camera optical lens according to claim 3, characterized in that, The following relationship is also satisfied: (FOV*f) / IH≤125.

5. The camera optical lens according to claim 1, wherein, A curvature radius of an object-side surface of the first lens is R1, a curvature radius of an image-side surface of the first lens is R2, a focal length of the first lens is f1, a focal length of the camera optical lens is f, and a total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 0.44≤(R1+R2) / (R1-R2)≤5.87; -7.27≤f1 / f≤-0.83; 0.01≤d1 / TTL≤0.

05.

6. The camera optical lens according to claim 1, characterized in that, A focal length of the second lens is f2, a focal length of the camera optical lens is f, and a total optical length of the camera optical lens is TTL, and the following relationships are satisfied: -34.47≤(R3+R4) / (R3-R4)≤-1.01; 3.18≤f2 / f≤17.23; 0.01≤d3 / TTL≤0.

08.

7. The camera optical lens according to claim 1, wherein, A radius of curvature of an object side surface of the third lens is R5, a radius of curvature of an image side surface of the third lens is R6, a focal length of the camera optical lens is f, an on-axis thickness of the third lens is d5, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: 0.01≤(R5+R6) / (R5-R6)≤0.62; 0.47≤f3 / f≤2.47; 0.03≤d5 / TTL≤0.

22.

8. The camera optical lens according to claim 1, characterized in that, A radius of curvature of an object side surface of the fourth lens is R7, a radius of curvature of an image side surface of the fourth lens is R8, a focal length of the camera optical lens is f, an on-axis thickness of the fourth lens is d7, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -1.98≤(R7+R8) / (R7-R8)≤1.12; 0.76≤f4 / f≤5.61; 0.01≤d7 / TTL≤0.

23.

9. The camera optical lens according to claim 1, characterized in that, A radius of curvature of an object side surface of the fifth lens is R9, a radius of curvature of an image side surface of the fifth lens is R10, a focal length of the fifth lens is f5, a focal length of the camera optical lens is f, an on-axis thickness of the fifth lens is d9, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -0.99≤(R9+R10) / (R9-R10)≤1.45; -3.48≤f5 / f≤-0.45; 0.00≤d9 / TTL≤0.

28.

10. The camera optical lens according to claim 1, characterized in that, A radius of curvature of an object side surface of the sixth lens is R11, a radius of curvature of an image side surface of the sixth lens is R12, a focal length of the camera optical lens is f, an on-axis thickness of the sixth lens is d11, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -2.00≤(R11+R12) / (R11-R12)≤0.22; 1.00≤f6 / f≤5.66; 0.01≤d11 / TTL≤0.

14.

11. The camera optical lens according to claim 1, characterized in that, A radius of curvature of an object side surface of the seventh lens is R13, a radius of curvature of an image side surface of the seventh lens is R14, a focal length of the camera optical lens is f, an on-axis thickness of the seventh lens is d13, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -11.16≤(R13+R14) / (R13-R14)≤-0.01; 0.89≤f7 / f≤10.88; 0.01≤d13 / TTL≤0.

30.

12. The camera optical lens according to claim 1, characterized in that, A radius of curvature of an object side surface of the eighth lens is R15, a radius of curvature of an image side surface of the eighth lens is R16, an on-axis thickness of the eighth lens is d15, an overall optical length of the camera optical lens is TTL, and the following relationships are satisfied: -12.50≤(R15+R16) / (R15-R16)≤0.02; 0.01≤d15 / TTL≤0.

05.

13. The camera optical lens according to claim 1, characterized in that, The first lens, and / or the second lens, and / or the third lens, and / or the fourth lens, and / or the fifth lens, and / or the sixth lens, and / or the seventh lens, and / or the eighth lens is made of glass.

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