Shooting optical lens

Abstract

The embodiment of the invention relates to the technical field of optics, and discloses a camera shooting optical lens which comprises nine lenses which are sequentially a first lens with negative refraction power, a second lens with negative refraction power, a third lens with negative refraction power and a fourth lens with positive refraction power from the object side to the image side. The lens is composed of a first lens with positive refractive power, a second lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power, an eighth lens and a ninth lens. The camera shooting optical lens has good optical performance in visible light and infrared light wave bands, the optical total length of the camera shooting optical lens can be controlled, the focal length of the lens is reasonably distributed, the temperature drift of the camera shooting optical lens is effectively controlled, the deflection degree of light passing through the lens is relieved, chromatic aberration is effectively corrected, and the imaging effect is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of optical technology, and in particular to a camera optical lens. Background Art

[0002] Camera optical lenses are widely used in mobile devices, vehicle-mounted cameras and monitoring equipment, especially in smart mobile devices. As users' demand for shooting on smart mobile devices increases, existing camera optical lenses are increasingly unable to meet market demand.

[0003] In existing camera optical lenses, the imaging effect is often improved by increasing the number or size of lenses, which will increase the total optical length of the entire camera optical lens, which is not conducive to the realization of miniaturization design. In addition, due to design defects, existing camera optical lenses also have large chromatic aberration and obvious temperature drift, which is not conducive to high-quality imaging. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a large aperture, wide-angle dual-channel camera optical lens with good optical performance in both visible light and infrared light bands, which can control the total optical length of the camera optical lens, reasonably allocate the focal length of the lens, effectively control the temperature drift of the camera optical lens, alleviate the degree of deflection of light passing through the lens, effectively correct chromatic aberration, and improve imaging effects.

[0005] To solve the above technical problems, an embodiment of the present invention provides a camera optical lens, which comprises nine lenses in total, and the nine lenses are, from the object side to the image side, in order: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power, an eighth lens and a ninth lens; the object side surface of the first lens is convex at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; the object side surface of the second lens is convex at the paraxial position, and the image side surface of the second lens is concave at the paraxial position; the object side surface of the third lens is concave at the paraxial position, and the image side surface of the third lens is concave at the paraxial position; the object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is convex at the paraxial position; the object side surface of the fifth lens is convex at the paraxial position, and the image side surface of the fifth lens is convex at the paraxial position. The image side surface of the lens is convex at the paraxial position; the object side surface of the sixth lens is convex at the paraxial position, and the image side surface of the sixth lens is concave at the paraxial position; the object side surface of the seventh lens is convex at the paraxial position, and the image side surface of the seventh lens is convex at the paraxial position; the object side surface of the eighth lens is concave at the paraxial position, and the image side surface of the eighth lens is concave at the paraxial position; the object side surface of the ninth lens is convex at the paraxial position, and the image side surface of the ninth lens is convex at the paraxial position; the second lens The central curvature radius of the object side of the mirror is R3, the central curvature radius of the image side of the second lens is R4, the focal length of the fifth lens is f5, the axial spacing between the fifth lens and the sixth lens is d10, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 2.00≤R3 / R4≤4.00; 4.30≤f5 / f≤6.80; 0.09≤d10 / TTL≤0.15.

[0006] Optionally, the refractive index of the first lens is nd1, and satisfies the following relationship: 1.70≤nd1≤2.20.

[0007] Optionally, the refractive index nd1 of the first lens further satisfies the following relationship: 1.71≤nd1≤1.82.

[0008] Optionally, the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following relationship is satisfied: -0.60≤f3 / f4≤-0.45.

[0009] Optionally, the field of view angle of 1.0 field of view of the camera optical lens is FOV, the image height of 1.0 field of view of the camera optical lens is IH, and the following relationship is satisfied: 60.00≤(FOV*f) / IH≤75.00.

[0010] Optionally, the camera optical lens also satisfies the following relationship: 62.00≤(FOV*f) / IH≤75.00.

[0011] Optionally, the back focal length of the camera optical lens is BFL, and satisfies the following relationship: 0.05≤BFL / TTL≤0.10.

[0012] Optionally, 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 focal length of the first lens is f1, the axial thickness of the first lens is d1, and the following relationship is satisfied: 1.34≤(R1+R2) / (R1-R2)≤1.55; -8.33≤f1 / f≤-5.82; 0.05≤d1 / TTL≤0.09.

[0013] Optionally, the focal length of the second lens is f2, the axial thickness of the second lens is d3, and the following relationship is satisfied: 1.66≤(R3+R4) / (R3-R4)≤3.00; -6.80≤f2 / f≤-4.95; 0.01≤d3 / TTL≤0.06.

[0014] Optionally, 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 focal length of the third lens is f3, the axial thickness of the third lens is d5, and the following relationship is satisfied: -0.24≤(R5+R6) / (R5-R6)≤-0.07; -4.29≤f3 / f≤-2.97; 0.01≤d5 / TTL≤0.04.

[0015] Optionally, the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, the focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, and the following relationship is satisfied: -0.10≤(R7+R8) / (R7-R8)≤0.01; 6.09≤f4 / f≤8.26; 0.22≤d7 / TTL≤0.26.

[0016] Optionally, 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 axial thickness of the fifth lens is d9, and the following relationship is satisfied: -0.39≤(R9+R10) / (R9-R10)≤-0.32; 4.32≤f5 / f≤6.74; 0.09≤d9 / TTL≤0.14.

[0017] Optionally, 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, the focal length of the sixth lens is f6, the axial thickness of the sixth lens is d11, and the following relationship is satisfied: 3.04≤(R11+R12) / (R11-R12)≤3.52; -4.50≤f6 / f≤-3.49; 0.01≤d11 / TTL≤0.02.

[0018] Optionally, a central curvature radius of the object side surface of the seventh lens is R13, a central curvature radius of the image side surface of the seventh lens is R14, the focal length of the seventh lens is f7, the axial thickness of the seventh lens is d13, and the following relationship is satisfied: -0.51≤(R13+R14) / (R13-R14)≤-0.39; 1.87≤f7 / f≤2.50; 0.03≤d13 / TTL≤0.05.

[0019] Optionally, the central curvature radius of the object side surface of the eighth lens is R15, the central curvature radius of the image side surface of the eighth lens is R16, the focal length of the eighth lens is f8, the axial thickness of the eighth lens is d15, and the following relationship is satisfied: 0.08≤(R15+R16) / (R15-R16)≤0.41; -3.20≤f8 / f≤7.70; 0.00≤d15 / TTL≤0.02.

[0020] Optionally, the central curvature radius of the object side surface of the ninth lens is R17, the central curvature radius of the image side surface of the ninth lens is R18, the focal length of the ninth lens is f9, the axial thickness of the ninth lens is d17, and the following relationship is satisfied: -0.95≤(R17+R18) / (R17-R18)≤-0.16; -3.30≤f9 / f≤5.10; 0.00≤d17 / TTL≤0.04.

[0021] Optionally, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens are glass lenses.

[0022] The beneficial effect of the present invention is that: through the configuration of the above-mentioned lenses, a large aperture, wide-angle dual-channel vehicle-mounted camera optical lens with good optical performance in both visible light and infrared light bands is provided, which can control the total optical length of the camera optical lens, reasonably allocate the focal length of the lens, effectively control the temperature drift of the camera optical lens, alleviate the degree of deflection of light passing through the lens, effectively correct chromatic aberration, and improve imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0026] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0027] Figure 4 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0028] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0029] Figure 6 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0030] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0031] Figure 8 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0032] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0033] Fig.10 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0034] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0035] Fig.12 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0036] Fig.13 is a schematic structural diagram of a camera optical lens according to a fourth embodiment of the present invention;

[0037] Fig.14 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0038] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0039] Fig.16 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0040] Fig.17 is a schematic structural diagram of an imaging optical lens according to a fifth embodiment of the present invention;

[0041] Fig.18 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0042] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0043] Fig. 20 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0044] Fig.21 is a schematic structural diagram of a camera optical lens according to a sixth embodiment of the present invention;

[0045] Fig. 22 yes Fig.21 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0046] Fig.23 yes Fig.21 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0047] Fig.24 yes Fig.21 Schematic diagram of axial aberration of the camera optical lens shown;

[0048] Fig.25 is a schematic structural diagram of a camera optical lens according to a comparative embodiment of the present invention;

[0049] Fig.26 yes Fig.25 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0050] Fig. 27 yes Fig.25 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0051] Fig.28 yes Fig.25Schematic diagram of axial aberration of the camera optical lens shown. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0053] See also Figure 1 , 5 , 9, 13, 17 and 21, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40, 50, 60, and the camera optical lens 10, 20, 30, 40, 50, 60 comprises nine lenses in total. Specifically, the camera optical lens comprises, from the object side to the image side: a first lens L1 with negative refractive power, a second lens L2 with negative refractive power, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with positive refractive power, a sixth lens L6 with negative refractive power, a seventh lens L7 with positive refractive power, an eighth lens L8 and a ninth lens L9.

[0054] The object side surface of the first lens L1 is convex at the paraxial position, and the image side surface of the first lens L1 is concave at the paraxial position; the object side surface of the second lens L2 is convex at the paraxial position, and the image side surface of the second lens L2 is concave at the paraxial position; the object side surface of the third lens L3 is concave at the paraxial position, and the image side surface of the third lens L3 is concave at the paraxial position; the object side surface of the fourth lens L4 is convex at the paraxial position, and the image side surface of the fourth lens L4 is convex at the paraxial position; the object side surface of the fifth lens L5 is convex at the paraxial position, The image side surface of the fifth lens L5 is convex at the paraxial position; the object side surface of the sixth lens L6 is convex at the paraxial position, and the image side surface of the sixth lens L6 is concave at the paraxial position; the object side surface of the seventh lens L7 is convex at the paraxial position, and the image side surface of the seventh lens L7 is convex at the paraxial position; the object side surface of the eighth lens L8 is concave at the paraxial position, and the image side surface of the eighth lens L8 is concave at the paraxial position; the object side surface of the ninth lens L9 is convex at the paraxial position, and the image side surface of the ninth lens L9 is convex at the paraxial position. The object side surface and image side surface of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, and the ninth lens L9 can also be set to other concave and convex distributions.

[0055] Define the central curvature radius of the object side surface of the second lens L2 as R3, the central curvature radius of the image side surface of the second lens L2 as R4, the focal length of the fifth lens L5 as f5, the axial distance between the fifth lens L5 and the sixth lens L6 as d10, the focal length of the camera optical lenses 10, 20, 30, 40, 50, 60 as f, the total optical length of the camera optical lenses 10, 20, 30, 40, 50, 60 as TTL, and satisfy the following relationship:

[0056] 2.00≤R3 / R4≤4.00 (1)

[0057] 4.30≤f5 / f≤6.80 (2)

[0058] 0.09≤d10 / TTL≤0.15 (3)

[0059] The condition (1) specifies the shape of the second lens L2. Within the range defined by the condition (1), the degree of deflection of light passing through the second lens L2 can be mitigated, and chromatic aberration can be effectively corrected. Specifically, in the visible light band, the chromatic aberration |LC| can be made ≤4.0 μm.

[0060] Conditional formula (2) specifies the ratio range of the focal length f5 of the fifth lens L5 and the focal length f of the imaging optical lenses 10, 20, 30, 40, 50, 60. Within this range, the focal length value of the fifth lens L5 can be controlled, and the focal length can be reasonably allocated, which is beneficial to controlling temperature drift and improving the temperature performance of the imaging optical lenses 10, 20, 30, 40, 50, 60.

[0061] Conditional formula (3) specifies the ratio range of the distance d10 between the fifth lens L5 and the sixth lens L6 on the optical axis and the total length TTL of the system of the camera optical lens 10, 20, 30, 40, 50, 60. When the aperture ST is set between the fifth lens L5 and the sixth lens L6, it is helpful for the smooth transition of light near the aperture ST, which is beneficial to improving the imaging quality. When the ratio is controlled to be no greater than 0.15, the total length TTL of the system can be effectively controlled to avoid the camera optical lens 10, 20, 30, 40, 50, 60 being too large.

[0062] In the scheme of the present invention, through the configuration of the above-mentioned lenses, a large aperture, wide-angle dual-channel camera optical lens 10, 20, 30, 40, 50, 60 with good optical performance in both visible light and infrared light bands is provided, which can control the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60, reasonably allocate the focal length of the lens, effectively control the temperature drift of the camera optical lens 10, 20, 30, 40, 50, 60, alleviate the degree of deflection of light passing through the lens, effectively correct chromatic aberration, and improve imaging effect.

[0063] It should be noted that the units of the above-mentioned central curvature radius, focal length, on-axis spacing and total optical length are millimeters.

[0064] The refractive index of the first lens L1 is defined as nd1, and satisfies the following relationship:

[0065] 1.70≤nd1≤2.20 (4)

[0066] Conditional formula (4) specifies the range of the refractive index nd1 of the first lens L1. The first lens L1 is preferably made of a material with a higher refractive index, which is beneficial to reducing the front port diameter of the imaging optical lens 10, 20, 30, 40, 50, 60 and improving the imaging quality of the imaging optical lens 10, 20, 30, 40, 50, 60. More preferably, 1.71≤nd1≤1.82.

[0067] The focal length of the third lens L3 is defined as f3, and the focal length of the fourth lens L4 is defined as f4, and the following relationship is satisfied:

[0068] -0.60≤f3 / f4≤-0.45 (5)

[0069] The conditional expression (5) defines the ratio range of the focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4. By properly allocating the focal lengths of the third lens L3 and the fourth lens L4, it helps to smoothly transition large-angle light, thereby improving imaging quality.

[0070] The field angle of view of the 1.0 field of view of the camera optical lens 10, 20, 30, 40, 50, 60 is defined as FOV, and the image height of the 1.0 field of view of the camera optical lens 10, 20, 30, 40, 50, 60 is defined as IH, and the following relationship is satisfied:

[0071] 60.00≤(FOV*f) / IH≤75.00 (6)

[0072] Under the condition of satisfying the constraint of conditional formula (6), the camera optical lenses 10, 20, 30, 40, 50, 60 can take into account both a large field of view and a long focal length, and realize medium and long distance imaging. More preferably, 62.00≤(FOV*f) / IH≤75.00.

[0073] The back focal length of the camera optical lens 10, 20, 30, 40, 50, 60 is defined as BFL, and satisfies the following relationship:

[0074] 0.05≤BFL / TTL≤0.10 (7)

[0075] Conditional formula (7) limits the ratio range of the back focal length BFL of the camera optical lens 10, 20, 30, 40, 50, 60 to the total length TTL of the system. Under this restriction, the size of the back focal length BFL can be controlled on the basis of miniaturization, which is beneficial to the assembly of the camera module, reduces the sensitivity of the lens to MTF, improves the production yield, and reduces the production cost.

[0076] When the above conditions are met, the camera optical lenses 10, 20, 30, 40, 50, 60 have good optical performance in both visible and infrared bands, and can meet the design requirements of large aperture and wide-angle dual-channel optical camera lenses; according to the characteristics of the camera optical lenses 10, 20, 30, 40, 50, 60.

[0077] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0078] Define the central curvature radius of the object side surface of the first lens L1 as R1, the central curvature radius of the image side surface of the first lens L1 as R2, the focal length of the first lens L1 as f1, and the axial thickness of the first lens L1 as d1, and satisfy the following relationship:

[0079] 1.34≤(R1+R2) / (R1-R2)≤1.55 (8)

[0080] -8.33≤f1 / f≤-5.82 (9)

[0081] 0.05≤d1 / TTL≤0.09 (10)

[0082] Conditional formula (8) specifies the shape of the first lens L1. Within this range, it is helpful to reduce the spherical aberration of the camera optical lens 10, 20, 30, 40, 50, 60 and improve the imaging quality. Conditional formula (9) specifies the ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens 10, 20, 30, 40, 50, 60. The first lens L1 has an appropriate negative refractive power, which is helpful to reduce the aberration of the camera optical lens 10, 20, 30, 40, 50, 60. Conditional formula (10) limits the ratio range of the axial thickness d1 of the first lens L1 to the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60, which is helpful to control the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60.

[0083] The focal length of the second lens L2 is defined as f2, the axial thickness of the second lens L2 is defined as d3, and the following relationship is satisfied:

[0084] 1.66≤(R3+R4) / (R3-R4)≤3.00 (11)

[0085] -6.80≤f2 / f≤-4.95 (12)

[0086] 0.01≤d3 / TTL≤0.06 (13)

[0087] Conditional formula (11) defines the shape of the second lens L2, which can alleviate the degree of deflection of light passing through the second lens L2 and effectively correct chromatic aberration. Conditional formula (12) defines the ratio of the focal length f2 of the second lens L2 to the focal length f of the camera optical lens 10, 20, 30, 40, 50, 60, which can make the second lens L2 have appropriate negative refractive power, which is beneficial to reducing aberration. Conditional formula (13) defines the axial thickness d3 of the second lens L2, which can effectively compress the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60, which is beneficial to achieve miniaturized design.

[0088] 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, the focal length of the third lens L3 is defined as f3, and the axial thickness of the third lens L3 is defined as d5, and the following relationship is satisfied:

[0089] -0.24≤(R5+R6) / (R5-R6)≤-0.07 (14)

[0090] -4.29≤f3 / f≤-2.97 (15)

[0091] 0.01≤d5 / TTL≤0.04 (16)

[0092] Conditional formula (14) defines the shape of the third lens L3, which can effectively correct the spherical aberration of the camera optical lens 10, 20, 30, 40, 50, 60 and improve the imaging quality. Conditional formula (15) defines the focal length f3 of the third lens L3. Within this range, the optical performance of the camera optical lens 10, 20, 30, 40, 50, 60 can be improved. Conditional formula (16) defines the axial thickness d5 of the third lens L3, which is beneficial to control the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60.

[0093] Define the central curvature radius of the object side surface of the fourth lens L4 as R7, the central curvature radius of the image side surface of the fourth lens L4 as R8, the focal length of the fourth lens L4 as f4, and the axial thickness of the fourth lens L4 as d7, and satisfy the following relationship:

[0094] -0.10≤(R7+R8) / (R7-R8)≤0.01 (17)

[0095] 6.09≤f4 / f≤8.26 (18)

[0096] 0.22≤d7 / TTL≤0.26 (19)

[0097] The conditional formula (17) defines the shape of the fourth lens L4, which can effectively correct the spherical aberration of the camera optical lens 10, 20, 30, 40, 50, 60 and improve the image quality. The conditional formula (18) defines the focal length f4 of the fourth lens L4, which is beneficial to improving the performance of the camera optical lens 10, 20, 30, 40, 50, 60. The conditional formula (19) defines the axial thickness d7 of the fourth lens L4, which can control the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60 and is beneficial to miniaturization design.

[0098] 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 the axial thickness of the fifth lens is defined as d9, and the following relationship is satisfied:

[0099] -0.39≤(R9+R10) / (R9-R10)≤-0.32 (20)

[0100] 4.32≤f5 / f≤6.74 (21)

[0101] 0.09≤d9 / TTL≤0.14 (22)

[0102] The conditional formula (20) defines the shape of the fifth lens L5, which can effectively correct the spherical aberration of the imaging optical lens 10, 20, 30, 40, 50, 60 and improve the imaging quality. The conditional formula (21) defines the focal length f5 of the fifth lens L5, which is beneficial to improving the performance of the imaging optical lens 10, 20, 30, 40, 50, 60. The conditional formula (22) defines the axial thickness d9 of the fifth lens L5, which is beneficial to compressing the total optical length TTL of the imaging optical lens 10, 20, 30, 40, 50, 60.

[0103] Define the central curvature radius of the object side surface of the sixth lens L6 as R11, the central curvature radius of the image side surface of the sixth lens L6 as R12, the focal length of the sixth lens L6 as f6, and the axial thickness of the sixth lens L6 as d11, and satisfy the following relationship:

[0104] 3.04≤(R11+R12) / (R11-R12)≤3.52 (23)

[0105] -4.50≤f6 / f≤-3.49 (24)

[0106] 0.01≤d11 / TTL≤0.02 (25)

[0107] Conditional formula (23) defines the shape of the sixth lens L6, which can alleviate the degree of deflection of light passing through the sixth lens L6 and effectively reduce aberrations. Conditional formula (24) defines the focal length f6 of the sixth lens L6. Within this range, the sixth lens L6 has an appropriate negative refractive power, which is conducive to reducing aberrations. Conditional formula (25) defines the axial thickness d11 of the sixth lens L6, which is conducive to compressing the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60 to achieve an ultra-thin design.

[0108] Define the central curvature radius of the object side surface of the seventh lens L7 to be R13, the central curvature radius of the image side surface of the seventh lens L7 to be R14, the focal length of the seventh lens L7 to be f7, and the axial thickness of the seventh lens L7 to be d13, and satisfy the following relationship:

[0109] -0.51≤(R13+R14) / (R13-R14)≤-0.39 (26)

[0110] 1.87≤f7 / f≤2.50 (27)

[0111] 0.03≤d13 / TTL≤0.05 (28)

[0112] Conditional formula (26) specifies the shape of the seventh lens L7, which can effectively correct the spherical aberration of the camera optical lens 10, 20, 30, 40, 50, 60 and improve the image quality. Conditional formula (27) defines the focal length f7 of the seventh lens L7, so that the seventh lens L7 has an appropriate positive refractive power and effectively reduces aberrations. Conditional formula (28) defines the axial thickness d13 of the seventh lens L7, which is beneficial to control the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60.

[0113] The central curvature radius of the object side surface of the eighth lens L8 is defined as R15, the central curvature radius of the image side surface of the eighth lens L8 is defined as R16, the focal length of the eighth lens L8 is defined as f8, and the axial thickness of the eighth lens L8 is defined as d15, and the following relationship is satisfied:

[0114] 0.08≤(R15+R16) / (R15-R16)≤0.41 (29)

[0115] -3.20≤f8 / f≤7.70 (30)

[0116] 0.00≤d15 / TTL≤0.02 (31)

[0117] Conditional formula (29) specifies the shape of the eighth lens L8. Within the above range, the shape of the eighth lens L8 can be reasonably controlled, which is conducive to alleviating the degree of deflection of light passing through the eighth lens L8, so that the camera optical lens 10, 20, 30, 40, 50, 60 has better imaging quality and lower sensitivity. Conditional formula (30) limits the focal length f8 of the eighth lens L8. Within this range, the optical performance of the camera optical lens 10, 20, 30, 40, 50, 60 can be improved. Conditional formula (30) specifies the axial thickness d15 of the eighth lens L8, which is conducive to compressing the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60 to achieve an ultra-thin design.

[0118] The central curvature radius of the object side surface of the ninth lens L9 is defined as R17, the central curvature radius of the image side surface of the ninth lens L9 is defined as R18, the focal length of the ninth lens L9 is defined as f9, and the axial thickness of the ninth lens L9 is defined as d17, and the following relationship is satisfied:

[0119] -0.95≤(R17+R18) / (R17-R18)≤-0.16 (32)

[0120] -3.30≤f9 / f≤5.10 (33)

[0121] 0.00≤d17 / TTL≤0.04 (34)

[0122] The conditional formula (32) defines the shape of the ninth lens L9, which helps to reduce the spherical aberration of the camera optical lens 10, 20, 30, 40, 50, 60 and improve the imaging quality. The conditional formula (33) defines the focal length f9 of the ninth lens L9, which can improve the optical performance of the camera optical lens 10, 20, 30, 40, 50, 60. The conditional formula (34) defines the axial thickness d17 of the ninth lens L9, which helps to reasonably control the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60.

[0123] In this solution, the field of view angle FOV of 1.0 field of view of the camera optical lenses 10, 20, 30, 40, 50, 60 also satisfies the following relationship:

[0124] 109.40°≤FOV≤126° (35)

[0125] In this embodiment, 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, the eighth lens L8 and the ninth lens L9 are all made of glass. Each lens may also be made of other materials.

[0126] In the present invention, the aperture ST of the imaging optical lens 10, 20, 30, 40, 50, 60 is not limited to being between the fifth lens L5 and the sixth lens L6, but may also be disposed at other positions. In addition, the imaging optical lens 10, 20, 30, 40, 50, 60 may also be provided with one or more optical elements such as an optical filter GF, wherein the optical filter GF may be a glass cover plate or an optical filter. For example, an optical filter may be provided on the image side of the ninth lens L9.

[0127] The present invention provides a large aperture, wide-angle dual-channel camera optical lens 10, 20, 30, 40, 50, 60 with good optical performance in both visible light and infrared light bands through the above-mentioned lens configuration method. It can control the total optical length of the camera optical lens 10, 20, 30, 40, 50, 60, reasonably allocate the focal length of the lens, effectively control the temperature drift of the camera optical lens 10, 20, 30, 40, 50, 60, alleviate the degree of deflection of light passing through the lens, effectively correct chromatic aberration, and improve imaging effect.

[0128] The following examples will be used to illustrate the camera optical lenses 10, 20, 30, 40, 50, and 60 of the present invention. The symbols recorded in each example are as shown in Table [1]. The units of focal length, on-axis spacing, radius of curvature, center radius of curvature, and on-axis thickness are millimeters.

[0129] TTL: total optical length (the axial distance from the object side of the first lens L1 to the image surface Si), in millimeters;

[0130] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter;

[0131] 1.0 Image height IH of the field of view: the height of the field of view corresponding to the effective pixel of the sensor (that is, half of the diagonal length of the effective pixel area of ​​the sensor);

[0132] 1.0 Field of view FOV: the field of view angle corresponding to the effective pixels of the sensor;

[0133] Preferably, an inflection point and / or a stagnation point may be provided on the object side and / or the image side of the lens to meet high-quality imaging requirements.

[0134] First embodiment:

[0135] Figure 1 1 is a schematic diagram of the structure of the imaging optical lens 10 in the first embodiment. The following shows the design data of the imaging optical lens 10 in the first embodiment of the present invention.

[0136] Table 1 lists the central curvature radius R of the object side and image side of the first lens L1 to the ninth lens L9 constituting the imaging optical lens 10 in the first embodiment of the present invention, the axial thickness of the lens, the axial distance d between the lenses, the refractive index nd and the Abbe number vd. It should be noted that in this embodiment, the units of distance, radius and thickness are all millimeters (mm).

[0137]

Table 1

[0138]

[0139]

[0140] The meanings of the symbols in the above table are as follows:

[0141] R: radius of curvature of the optical surface, the central radius of curvature of the object side or image side of the lens; ST: aperture;

[0142] R1: the central curvature radius of the object side of the first lens L1;

[0143] R2: the central curvature radius of the image side surface of the first lens L1;

[0144] R3: the central curvature radius of the object side surface of the second lens L2;

[0145] R4: the central curvature radius of the image side surface of the second lens L2;

[0146] R5: the central curvature radius of the object side surface of the third lens L3;

[0147] R6: the central curvature radius of the image side surface of the third lens L3;

[0148] R7: the central curvature radius of the object side surface of the fourth lens L4;

[0149] R8: the central curvature radius of the image side surface of the fourth lens L4;

[0150] R9: the central curvature radius of the object side surface of the fifth lens L5;

[0151] R10: the central curvature radius of the image side surface of the fifth lens L5;

[0152] R11: central curvature radius of the object side surface of the sixth lens L6;

[0153] R12: central curvature radius of the image side surface of the sixth lens L6;

[0154] R13: central curvature radius of the object side surface of the seventh lens L7;

[0155] R14: central curvature radius of the image side surface of the seventh lens L7;

[0156] R15: central curvature radius of the object side surface of the eighth lens L8;

[0157] R16: central curvature radius of the image side surface of the eighth lens L8;

[0158] R17: the central curvature radius of the object side surface of the ninth lens L9;

[0159] R18: the central curvature radius of the image side surface of the ninth lens L9;

[0160] R19: radius of curvature of the object side surface of the first optical filter GF1;

[0161] R20: radius of curvature of the image side surface of the first optical filter GF1;

[0162] R21: radius of curvature of the object side surface of the second optical filter GF2;

[0163] R22: radius of curvature of the image side surface of the second optical filter GF2;

[0164] d: the axial thickness of the lens, the axial distance between lenses;

[0165] d1: axial thickness of the first lens L1;

[0166] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0167] d3: axial thickness of the second lens L2;

[0168] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0169] d5: axial thickness of the third lens L3;

[0170] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0171] d7: axial thickness of the fourth lens L4;

[0172] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0173] d9: axial thickness of the fifth lens L5;

[0174] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0175] d11: axial thickness of the sixth lens L6;

[0176] d12: axial distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

[0177] d13: axial thickness of the seventh lens L7;

[0178] d14: axial distance from the image side surface of the seventh lens L7 to the object side surface of the eighth lens L8;

[0179] d15: axial thickness of the eighth lens L8;

[0180] d16: the axial distance from the image side surface of the eighth lens L8 to the object side surface of the ninth lens L9;

[0181] d17: axial thickness of the ninth lens L9;

[0182] d18: the axial distance from the image side surface of the ninth lens L9 to the object side surface of the first optical filter GF1;

[0183] d19: axial thickness of the first optical filter GF1;

[0184] d20: the axial distance from the image side surface of the first optical filter GF1 to the object side surface of the second optical filter GF2;

[0185] d21: axial thickness of the second optical filter GF2;

[0186] d22: the axial distance from the image side surface of the second optical filter GF2 to the image plane Si;

[0187] nd: refractive index of d-line (d-line is green light with a wavelength of 555nm);

[0188] nd1: refractive index of the first lens L1 at the d-line;

[0189] nd2: refractive index of the d-line of the second lens L2;

[0190] nd3: refractive index of the third lens L3 at the d-line;

[0191] nd4: refractive index of the d-line of the fourth lens L4;

[0192] nd5: the refractive index of the fifth lens L5 at the d-line;

[0193] nd6: the refractive index of the d-line of the sixth lens L6;

[0194] nd7: the refractive index of the d-line of the seventh lens L7;

[0195] nd8: the refractive index of the eighth lens L8 at the d-line;

[0196] nd9: the refractive index of the d-line of the ninth lens L9; ndg1: the refractive index of the d-line of the first optical filter GF1; ndg2: the refractive index of the d-line of the second optical filter GF2; vd: Abbe number;

[0197] vd1: Abbe number of the first lens L1;

[0198] vd2: Abbe number of the second lens L2;

[0199] vd3: Abbe number of the third lens L3;

[0200] vd4: Abbe number of the fourth lens L4;

[0201] vd5: Abbe number of the fifth lens L5;

[0202] vd6: Abbe number of sixth lens L6;

[0203] vd7: Abbe number of the seventh lens L7;

[0204] vd8: Abbe number of the eighth lens L8;

[0205] vd9: Abbe number of the ninth lens L9;

[0206] vg1: Abbe number of the first optical filter GF1; vg2: Abbe number of the second optical filter GF2.

[0207]

Table 2

[0208]

[0209]

[0210] It should be noted that the aspheric surface of each lens in this embodiment uses the aspheric surface shown in the following conditional formula (36), but the specific form of the following conditional formula (36) is only an example. In fact, the present invention is not limited to the aspheric polynomial form indicated in the conditional formula (36).

[0211] z=(c 2 / r) / {1+[1-(k+1)(c 2 / r 2 )] 1 / 2}+A4c 4 +A6c 6 +A8c 8 +A10c 10 (36)

[0212] Among them, k is the cone coefficient, A4, A6, A8, A10 are the aspheric coefficients. c is the curvature at the center of the optical surface, r is the vertical distance between the point on the aspheric curve and the optical axis, and z is the aspheric depth (the vertical distance between the point r from the optical axis on the aspheric surface and the tangent plane tangent to the vertex on the aspheric optical axis).

[0213] In addition, in the subsequent Table 15, various parameters in the first embodiment and values ​​corresponding to the prescribed parameters in the conditional expressions are also listed.

[0214] Figure 2 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with wavelengths of 555 nanometers and 940 nanometers after passing through the camera optical lens 10 of the first embodiment. Figure 2 The mid-field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction; Figure 3 A schematic diagram of magnification chromatic aberration after wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers pass through the camera optical lens 10 of the first embodiment is shown; Figure 4 A schematic diagram of axial aberrations of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the imaging optical lens 10 of the first embodiment is shown.

[0215] As shown in Table 15, the first embodiment satisfies each conditional expression.

[0216] In this embodiment, the entrance pupil diameter of the camera optical lens 10 is 0.831 mm, the image height IH of 1.0 field of view is 3.564 mm, and the field of view angle FOV of 1.0 field of view is 121.04°. The camera optical lens 10 meets the design requirements of large aperture and wide angle with good optical performance in both visible light and infrared light bands. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0217] Second embodiment

[0218] Figure 5 2 is a schematic diagram of the structure of the camera optical lens 20 in the second embodiment. The second embodiment is basically 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.

[0219] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0220]

Table 3

[0221]

[0222]

[0223]

Table 4

[0224]

[0225]

[0226] In addition, in the subsequent Table 15, various parameters in the second embodiment and the values ​​corresponding to the prescribed parameters in the conditional expressions are also listed.

[0227] Figure 6 FIG. 4 shows a schematic diagram of field curvature and distortion of light with wavelengths of 555 nanometers and 940 nanometers after passing through the camera optical lens 20 of the second embodiment. Figure 6 The mid-field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction; Figure 7 A schematic diagram of magnification chromatic aberration of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 20 of the second embodiment is shown; Figure 8 A schematic diagram of axial aberrations of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the imaging optical lens 20 of the second embodiment is shown.

[0228] As shown in Table 15, the second embodiment satisfies each conditional expression.

[0229] In this embodiment, the entrance pupil diameter of the camera optical lens 20 is 1.018 mm, the image height IH of the 1.0 field of view is 3.564 mm, and the field of view angle FOV of the 1.0 field of view is 109.41°. The camera optical lens 20 meets the design requirements of large aperture and wide angle with good optical performance in both visible light and infrared light bands. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0230] Third embodiment

[0231] Fig. 9 3 is a schematic diagram of the structure of the camera optical lens 30 in the third embodiment. The third embodiment is basically 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.

[0232] In this embodiment, the eighth lens L8 has positive refractive power, and the ninth lens L9 has negative refractive power.

[0233] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0234]

Table 5

[0235]

[0236]

[0237]

Table 6

[0238]

[0239] In addition, in the subsequent Table 15, various parameters in the third embodiment and values ​​corresponding to the prescribed parameters in the conditional expressions are also listed.

[0240] Fig.10 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with wavelengths of 555 nanometers and 940 nanometers after passing through the camera optical lens 30 of the third embodiment. Fig.10 The mid-field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction; Fig.11 A schematic diagram of magnification chromatic aberration after wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers pass through the camera optical lens 30 of the third embodiment is shown; Fig.12 A schematic diagram of axial aberrations of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 30 of the third embodiment is shown.

[0241] As shown in Table 15, the third embodiment satisfies each conditional expression.

[0242] In this embodiment, the entrance pupil diameter of the camera optical lens 30 is 0.738 mm, the image height IH of 1.0 field of view is 3.564 mm, and the field of view angle FOV of 1.0 field of view is 125.45°. The camera optical lens 30 meets the design requirements of large aperture and wide angle with good optical performance in both visible light and infrared light bands. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0243] Fourth embodiment

[0244] Fig.13 3 is a schematic diagram of the structure of the camera optical lens 40 in the fourth embodiment. The fourth embodiment is basically 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.

[0245] Tables 7 and 8 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0246]

Table 7

[0247]

[0248]

Table 8

[0249]

[0250] In addition, in the subsequent Table 15, various parameters in the fourth embodiment and the values ​​corresponding to the prescribed parameters in the conditional expressions are also listed.

[0251] Fig.14 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with wavelengths of 555 nanometers and 940 nanometers after passing through the camera optical lens 40 of the fourth embodiment, Fig.14 The mid-field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction; Fig.15 A schematic diagram of magnification chromatic aberration of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 40 of the fourth embodiment is shown; Fig.16 A schematic diagram of axial aberrations of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 40 of the fourth embodiment is shown.

[0252] As shown in Table 15, the fourth embodiment satisfies each conditional expression.

[0253] In this embodiment, the entrance pupil diameter of the camera optical lens 40 is 0.917 mm, the image height IH of 1.0 field of view is 3.564 mm, and the field of view angle FOV of 1.0 field of view is 115.00°. The camera optical lens 40 meets the design requirements of large aperture and wide angle with good optical performance in both visible light and infrared light bands. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0254] Fifth embodiment

[0255] Fig.17 3 is a schematic diagram of the structure of the camera optical lens 50 in the fifth embodiment. The fifth embodiment is basically 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.

[0256] Tables 9 and 10 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0257]

Table 9

[0258]

[0259]

Table 10

[0260]

[0261]

[0262] In addition, in the subsequent Table 15, various parameters in the fifth embodiment and values ​​corresponding to the prescribed parameters in the conditional expressions are also listed.

[0263] Fig.18 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with wavelengths of 555 nanometers and 940 nanometers after passing through the camera optical lens 50 of the fifth embodiment. Fig.18 The mid-field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction; Fig.19 A schematic diagram of magnification chromatic aberration of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 50 of the fifth embodiment is shown; Fig. 20 A schematic diagram of axial aberrations after wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers pass through the camera optical lens 50 of the fifth embodiment is shown.

[0264] As shown in Table 15, the fifth embodiment satisfies each conditional expression.

[0265] In this embodiment, the entrance pupil diameter of the camera optical lens 50 is 0.892 mm, the image height IH of 1.0 field of view is 3.564 mm, and the field of view angle FOV of 1.0 field of view is 118.50°. The camera optical lens 50 meets the design requirements of large aperture and wide angle with good optical performance in both visible light and infrared light bands. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0266] Sixth Embodiment

[0267] Fig.21 3 is a schematic diagram of the structure of the camera optical lens 60 in the sixth embodiment. The sixth embodiment is basically 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.

[0268] Table 11 and Table 12 show design data of the imaging optical lens 60 according to the sixth embodiment of the present invention.

[0269]

Table 11

[0270]

[0271]

[0272]

Table 12

[0273]

[0274] In addition, in the subsequent Table 15, various parameters in the sixth embodiment and the values ​​corresponding to the prescribed parameters in the conditional expressions are also listed.

[0275] Fig. 22 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with wavelengths of 555 nanometers and 940 nanometers after passing through the camera optical lens 60 of the sixth embodiment. Fig. 22 The mid-field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction; Fig.23 A schematic diagram of magnification chromatic aberration of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 60 of the sixth embodiment is shown; Fig.24 A schematic diagram of axial aberrations of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 60 of the sixth embodiment is shown.

[0276] As shown in Table 15, the sixth embodiment satisfies each conditional expression.

[0277] In this embodiment, the entrance pupil diameter of the camera optical lens 60 is 0.774 mm, the image height IH of 1.0 field of view is 3.564 mm, and the field of view angle FOV of 1.0 field of view is 124.97°. The camera optical lens 60 meets the design requirements of large aperture and wide angle with good optical performance in both visible light and infrared light bands. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0278] Comparative Implementation Methods

[0279] Fig.25 3 is a schematic diagram of the structure of the camera optical lens 70 in the 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.

[0280] Tables 13 and 14 show the design data of the imaging optical lens 70 of the comparative embodiment.

[0281]

Table 13

[0282]

[0283]

[0284]

Table 14

[0285]

[0286] In addition, in the subsequent Table 15, the values ​​corresponding to the various parameters and the prescribed parameters in the conditional formula in the comparative implementation manner are also listed.

[0287] Fig.26 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with wavelengths of 555 nanometers and 940 nanometers after passing through the camera optical lens 70 of the comparative embodiment. Fig.26 The mid-field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction; Fig. 27 A schematic diagram of magnification chromatic aberration of wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers after passing through the camera optical lens 70 of the comparative implementation manner is shown; Fig.28 A schematic diagram of axial aberration after the camera optical lens 70 of the comparative implementation scheme is shown at wavelengths of 435 nanometers, 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, 650 nanometers, 920 nanometers, 940 nanometers, and 960 nanometers.

[0288] As shown in Table 15, the values ​​corresponding to the parameters in the comparative embodiment and the parameters specified in the conditional expression are also listed. Obviously, the imaging optical lens 70 of the comparative embodiment does not satisfy the above conditional expression 4.30≤f5 / f≤6.80.

[0289] In this embodiment, the entrance pupil diameter of the camera optical lens 70 is 0.710 mm, the image height IH of the 1.0 field of view is 3.564 mm, and the field of view angle FOV of the 1.0 field of view is 130.33°. The camera optical lens 70 cannot meet the design requirements of large aperture and wide angle with good optical performance in both visible light and infrared light bands. Its on-axis and off-axis chromatic aberrations are not fully corrected and it does not have excellent optical performance.

[0290]

Table 15

[0291]

[0292]

[0293] The above is a detailed introduction to the camera optical lens provided by the embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above implementation methods is only used to help understand the ideas of the present invention. There may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A camera optical lens, characterized in that: The camera optical lens comprises nine lenses in total, and the nine lenses are, from the object side to the image side, in order: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power, an eighth lens and a ninth lens; the object side surface of the first lens is convex at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; the object side surface of the second lens is convex at the paraxial position, and the image side surface of the second lens is concave at the paraxial position; the object side surface of the third lens is concave at the paraxial position, and the image side surface of the third lens is concave at the paraxial position; the object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is convex at the paraxial position; the object side surface of the fifth lens is is a convex surface, the image side surface of the fifth lens is a convex surface at the paraxial position; the object side surface of the sixth lens is a convex surface at the paraxial position, and the image side surface of the sixth lens is a concave surface at the paraxial position; the object side surface of the seventh lens is a convex surface at the paraxial position, and the image side surface of the seventh lens is a convex surface at the paraxial position; the object side surface of the eighth lens is a concave surface at the paraxial position, and the image side surface of the eighth lens is a concave surface at the paraxial position; the object side surface of the ninth lens is a convex surface at the paraxial position, and the image side surface of the ninth lens is a convex surface at the paraxial position; the central curvature radius of the object side surface of the second lens is R3, the central curvature radius of the image side surface of the second lens is R4, the focal length of the fifth lens is f5, the on-axis distance between the fifth lens and the sixth lens is d10, the focal length of the imaging optical lens is f, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 2.00≤R3 / R4≤4.00; 4.30≤f5 / f≤6.80; 0.09≤d10 / TTL≤0.

15.

2. The imaging optical lens according to claim 1, characterized in that: The refractive index of the first lens is nd1, and satisfies the following relationship: 1.70≤nd1≤2.

20.

3. The imaging optical lens according to claim 2, characterized in that: The refractive index nd1 of the first lens also satisfies the following relationship: 1.71≤nd1≤1.

82.

4. The imaging optical lens according to claim 1, wherein: The focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following relationship is satisfied: -0.60≤f3 / f4≤-0.

45.

5. The imaging optical lens according to claim 1, wherein: The field angle of view of the camera optical lens at 1.0 field of view is FOV, the image height of the camera optical lens at 1.0 field of view is IH, and the following relationship is satisfied: 60.00≤(FOV*f) / IH≤75.

00.

6. The imaging optical lens according to claim 5, characterized in that: The camera optical lens also satisfies the following relationship: 62.00≤(FOV*f) / IH≤75.

00.

7. The imaging optical lens according to claim 1, characterized in that: The back focal length of the camera optical lens is BFL, and satisfies the following relationship: 0.05≤BFL / TTL≤0.

10.

8. The imaging optical lens according to claim 1, characterized in that: 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 focal length of the first lens is f1, the axial thickness of the first lens is d1, and the following relationship is satisfied: 1.34≤(R1+R2) / (R1-R2)≤1.55; -8.33≤f1 / f≤-5.82; 0.05≤d1 / TTL≤0.

09.

9. The imaging optical lens according to claim 1, characterized in that: The focal length of the second lens is f2, the axial thickness of the second lens is d3, and the following relationship is satisfied: 1.66≤(R3+R4) / (R3-R4)≤3.00; -6.80≤f2 / f≤-4.95; 0.01≤d3 / TTL≤0.

06.

10. The imaging optical lens according to claim 1, characterized in that: 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 focal length of the third lens is f3, the axial thickness of the third lens is d5, and the following relationship is satisfied: -0.24≤(R5+R6) / (R5-R6)≤-0.07; -4.29≤f3 / f≤-2.97; 0.01≤d5 / TTL≤0.

04.

11. The imaging optical lens according to claim 1, characterized in that: The central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, the focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, and the following relationship is satisfied: -0.10≤(R7+R8) / (R7-R8)≤0.01; 6.09≤f4 / f≤8.26; 0.22≤d7 / TTL≤0.

26.

12. The imaging optical lens according to claim 1, characterized in that: 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 axial thickness of the fifth lens is d9, and the following relationship is satisfied: -0.39≤(R9+R10) / (R9-R10)≤-0.32; 4.32≤f5 / f≤6.74; 0.09≤d9 / TTL≤0.

14.

13. The imaging optical lens according to claim 1, characterized in that: 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, the focal length of the sixth lens is f6, the axial thickness of the sixth lens is d11, and the following relationship is satisfied: 3.04≤(R11+R12) / (R11-R12)≤3.52; -4.50≤f6 / f≤-3.49; 0.01≤d11 / TTL≤0.

02.

14. The imaging optical lens according to claim 1, characterized in that: The central curvature radius of the object side surface of the seventh lens is R13, the central curvature radius of the image side surface of the seventh lens is R14, the focal length of the seventh lens is f7, the axial thickness of the seventh lens is d13, and the following relationship is satisfied: -0.51≤(R13+R14) / (R13-R14)≤-0.39; 1.87≤f7 / f≤2.50; 0.03≤d13 / TTL≤0.

05.

15. The imaging optical lens according to claim 1, characterized in that: The central curvature radius of the object side surface of the eighth lens is R15, the central curvature radius of the image side surface of the eighth lens is R16, the focal length of the eighth lens is f8, the axial thickness of the eighth lens is d15, and the following relationship is satisfied: 0.08≤(R15+R16) / (R15-R16)≤0.41; -3.20≤f8 / f≤7.70; 0.00≤d15 / TTL≤0.

02.

16. The imaging optical lens according to claim 1, characterized in that: The central curvature radius of the object side surface of the ninth lens is R17, the central curvature radius of the image side surface of the ninth lens is R18, the focal length of the ninth lens is f9, the axial thickness of the ninth lens is d17, and the following relationship is satisfied: -0.95≤(R17+R18) / (R17-R18)≤-0.16; -3.30≤f9 / f≤5.10; 0.00≤d17 / TTL≤0.

04.

17. The imaging optical lens according to claim 1, characterized in that: The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens are glass lenses.

Images