Camera optical lens

Abstract

Disclosed is a camera optical lens (10), sequentially comprising, from an object side to an image side, a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5) and a sixth lens (L6), wherein the refractive index of the first lens (L1) is nd1; the field of view of the camera optical lens (10) is FOV; the focal length of the camera optical lens (10) is f; the image height of the camera optical lens (10) is IH; and the following conditional expressions are satisfied: nd1≥1.70; and (FOV*f) / IH≥120.00. The present camera optical lens (10) has good optical performance and can satisfy the design requirements for a large aperture and miniaturization.

Description

Camera optical lenses Technical Field

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

[0002] With the development of intelligent driving, automotive lenses are also rapidly being updated and iterated. Car cameras are favored by developers of autonomous driving technology due to their clear imaging effects. However, car cameras are easily affected by environmental factors (such as strong light, rain and snow), resulting in poor shooting effects. Based on this, it is important to use car-mounted lidar to supplement the information received by the car lens. LiDAR uses lasers to detect targets, obtains target light wave signals from reflected light, and processes information together with the transmitted signal to obtain information such as the distance, speed, and direction of the detected target. For LiDAR, the camera optical lens is an indispensable part of the LiDAR. The camera optical lens can collimate the LiDAR light beam to improve the detection effect.

[0003] However, the existing laser radar camera optical lenses still cannot meet the design requirements of large aperture and miniaturization, the reception effect is poor, and it is difficult to meet the application requirements of intelligent driving.

[0004] Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a camera optical lens, which has good optical performance, can meet the design requirements of large aperture and miniaturization, and has good reception effect.

[0006] To solve the above technical problems, the present application provides a camera optical lens, which includes, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the refractive index of the first lens is nd1, 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 satisfies the following conditions: nd1 ≥ 1.70; (FOV*FNO) / IH ≥ 120.00.

[0007] The beneficial effect of the present application is that: through the configuration of the above-mentioned lenses, the camera optical lens of the present application has good optical performance, and has the characteristics of large aperture and miniaturization, and has good receiving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0009] FIG1 is a schematic structural diagram of a camera optical lens according to a first embodiment of the present application;

[0010] FIG2 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG1 ;

[0011] FIG3 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG1 ;

[0012] FIG4 is a schematic diagram of axial aberration of the camera optical lens shown in FIG1 ;

[0013] FIG5 is a schematic structural diagram of a second embodiment of the present application of the optical lens;

[0014] FIG6 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG5 ;

[0015] FIG7 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG5 ;

[0016] FIG8 is a schematic diagram of axial aberration of the camera optical lens shown in FIG5 ;

[0017] FIG9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present application;

[0018] FIG10 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG9 ;

[0019] FIG11 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG9 ;

[0020] FIG12 is a schematic diagram of axial aberration of the camera optical lens shown in FIG9 ;

[0021] FIG13 is a schematic structural diagram of a fourth embodiment of the present application of the optical lens;

[0022] FIG14 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG13 ;

[0023] FIG15 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG13 ;

[0024] FIG16 is a schematic diagram of axial aberration of the camera optical lens shown in FIG13 ;

[0025] FIG17 is a schematic structural diagram of a camera optical lens according to a fifth embodiment of the present application;

[0026] FIG18 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG17 ;

[0027] FIG19 is a schematic diagram of magnification chromatic aberration of the imaging optical lens shown in FIG17 ;

[0028] FIG20 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG17 ;

[0029] FIG21 is a schematic structural diagram of a camera optical lens according to a comparative embodiment;

[0030] FIG22 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG21 ;

[0031] FIG23 is a schematic diagram of magnification chromatic aberration of the imaging optical lens shown in FIG21 ;

[0032] FIG24 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG21 . DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in each embodiment of the present application to help readers better understand the present application. However, even without these technical details and various variations and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0034] In the embodiments of the present application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" to indicate positions or locations are based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0035] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "installed," "set," "provided with," "opened," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0038] First embodiment:

[0039] Referring to FIG1 , a first embodiment of the present application provides a camera optical lens 10, wherein the camera optical lens 10 includes, 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, and a sixth lens L6. The refractive index of the first lens L1 is nd1, the field of view of the camera optical lens 10 is FOV, the focal length of the camera optical lens 10 is f, the image height of the camera optical lens 10 is IH, and the following conditions are satisfied: nd1 ≥ 1.70 (1) (FOV*f) / IH ≥ 120.00 (2)

[0040] Among them, conditional formula (1) stipulates that the refractive index nd1 of the first lens L1 is not less than 1.70. That is, the material of the first lens L1 is preferably an optical material with a high refractive index, which is beneficial to controlling the front port diameter of the camera optical lens 10 and improving the imaging quality.

[0041] Within the range specified by conditional expression (2), the camera optical lens 10 can simultaneously take into account a large field of view and a long focal length, thereby achieving medium and long-distance imaging of the camera optical lens 10 .

[0042] In this embodiment, by setting a plurality of lenses (L1, L2, L3, L4, L5, L6), and setting the refractive index nd1 of the first lens L1 and the imaging optical lens 10 to the range specified by the above-mentioned conditional expressions (1) and (2), the imaging optical lens 10 has good optical performance, and has the characteristics of large aperture and miniaturization, and has a good receiving effect.

[0043] Preferably, the refractive index nd1 of the first lens L1 also satisfies the following condition: nd1≤2.20 (3)

[0044] Preferably, the camera optical lens 10 further satisfies the following conditional formula: (FOV*f) / IH≤150.00 (4)

[0045] Preferably, the combined focal length of the first lens L1 and the second lens L2 is f12, the focal length of the camera optical lens 10 is f, and the following condition is satisfied: -6.00≤f12 / f≤-1.20 (5)

[0046] Equation (4) specifies the ratio of the combined focal length f12 of the first lens L1 and the second lens L2 to the focal length f of the imaging optical lens 10. Within the range specified by Equation (4), the field curvature of the system can be effectively balanced, with the field curvature offset of the central field of view being less than 0.04 mm, resulting in excellent imaging accuracy for the imaging optical lens 10.

[0047] Preferably, the curvature radius of the object side surface of the third lens L3 is R5, and the curvature radius of the image side surface of the third lens L3 is R6, and the following conditional formula is satisfied: -5.00≤R5 / R6≤-1.20 (6)

[0048] Conditional equation (6) specifies the shape of the third lens element L3, such that the ratio of the object-side curvature radius R5 to the image-side curvature radius R6 of the third lens element L3 satisfies the range specified by conditional equation (6). This can mitigate the degree of light deflection passing through the third lens element L3 and effectively correct chromatic aberration, so that the chromatic aberration |LC| is ≤3.5 μm.

[0049] Preferably, the curvature radius of the object side surface of the fourth lens L4 is R7, the curvature radius of the image side surface of the fourth lens L4 is R8, and the following conditional formula is satisfied: -4.00≤R7 / R8≤-1.00 (7)

[0050] Conditional equation (7) specifies the shape of the fourth lens L4, so that the ratio of the object-side curvature radius R7 to the image-side curvature radius R8 of the fourth lens L4 satisfies the range specified by conditional equation (7), which is beneficial for alleviating the degree of deflection of light passing through the fourth lens L4, so that the camera optical lens 10 has better imaging quality and lower sensitivity.

[0051] Preferably, the on-axis thickness of the fifth lens L5 is d9, and the on-axis thickness of the sixth lens L6 is d11, and the following condition is satisfied: 1.40≤d9 / d11≤5.00 (8)

[0052] Conditional formula (8) specifies the ratio of the on-axis thickness d9 of the fifth lens element L5 to the on-axis thickness d11 of the sixth lens element L6. Within the range specified by conditional formula (8), it is helpful to control the lens thicknesses of the fifth lens element L5 and the sixth lens element L6, which is beneficial to the injection molding of the fifth lens element L5 and the sixth lens element L6, and reduces the manufacturing difficulty of the camera optical lens 10.

[0053] In this embodiment, the object-side surface of the first lens L1 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction, and the first lens L1 has negative refractive power. In other optional embodiments, the first lens L1 may also have positive refractive power, and the object-side and image-side surfaces of the first lens 1 may also be configured with other concave-convex distributions.

[0054] Preferably, the object side curvature radius of the first lens L1 is R1, the image side curvature radius 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 is f, the axial thickness of the first lens L1 is d1, the total system length of the camera optical lens 10 is TTL, and the following relationships are satisfied: 0.33≤(R1+R2) / (R1-R2)≤1.97 (9) -3.54≤f1 / f≤-0.54 (10) 0.02≤d1 / TTL≤0.22 (11)

[0055] Conditional formula (9) specifies the shape of the first lens L1. Within this range, the degree of deflection of light passing through the first lens L1 can be alleviated, effectively reducing aberrations. More preferably, 0.53≤(R1+R2) / (R1-R2)≤1.57. Conditional formula (10) specifies the ratio of the focal length f1 of the first lens to the focal length f of the camera optical lens 10. Within the range defined by the conditional formula, it helps to improve the optical performance of the camera optical lens 10. More preferably, -2.21≤f1 / f≤-0.68. Conditional formula (11) specifies the ratio of the axial thickness d1 of the first lens L1 to the thickness of the total system length TTL of the camera optical lens 10. Within the above range, it helps to achieve an ultra-thin design of the camera optical lens 10. More preferably, 0.03≤d1 / TTL≤0.17.

[0056] In this embodiment, the object-side surface of the second lens element L2 is concave at the paraxial direction, and the image-side surface is convex at the paraxial direction, and the second lens element L2 has positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the second lens element L2 may be arranged in other concave-convex distributions, and the second lens element L2 may also have negative refractive power.

[0057] Preferably, the object side curvature radius of the second lens L2 is R3, the image side curvature radius of the second lens L2 is R4, the focal length of the second lens L2 is f2, the focal length of the camera optical lens 10 is f, the axial thickness of the second lens L2 is d3, the total system length of the camera optical lens 10 is TTL, and the following relationships are satisfied: 0.54≤(R3+R4) / (R3-R4)≤1.71 (12) 1.66≤f2 / f≤5.87 (13) 0.02≤d3 / TTL≤0.09 (14)

[0058] Conditional formula (12) specifies the shape of the second lens L2. Within the range defined by the conditional formula, the degree of deflection of light after passing through the second lens L2 can be alleviated, effectively reducing aberrations. Preferably, 0.87≤(R3+R4) / (R3-R4)≤1.37. Conditional formula (13) specifies the ratio of the focal length f2 of the second lens L2 to the focal length f of the camera optical lens 10. Within this range, it helps to improve the optical performance of the camera optical lens 10. More preferably, 2.65≤f2 / f≤4.70. Conditional formula (14) specifies the ratio of the axial thickness d3 of the second lens L2 to the total system length TTL of the camera optical lens 10. Within the range defined by the conditional formula, it helps to compress the total system length TTL of the camera optical lens 10, thereby achieving an ultra-thin design of the camera optical lens 10. More preferably, 0.03≤d3 / TTL≤0.07.

[0059] In this embodiment, the object-side surface of the third lens element L3 is concave at the paraxial direction, and the image-side surface is concave at the paraxial direction, and the third lens element L3 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the third lens element L3 may be arranged with other concave or convex distributions, and the third lens element L3 may also have positive refractive power.

[0060] 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 third lens L3 is f3, the focal length of the camera optical lens 10 is f, the axial thickness of the third lens L3 is d5, the total system length of the camera optical lens 10 is TTL, and the following relationships are satisfied: 0.05≤(R5+R6) / (R5-R6)≤1.00 (15) -7.30≤f3 / f≤-1.56 (16) 0.02≤d5 / TTL≤0.12 (17)

[0061] Conditional equation (15) specifies the shape of the third lens element L3, which can mitigate the degree of light deflection passing through the third lens element L3 and effectively correct chromatic aberration, ensuring that the chromatic aberration |LC| is ≤ 3.5 microns. More preferably, 0.07 ≤ (R5 + R6) / (R5 - R6) ≤ 0.80. Conditional equation (16) specifies the ratio of the focal length f3 of the third lens element L3 to the focal length f of the imaging optical lens 10. Within this range, the aberrations of the imaging optical lens 10 are reduced, while also facilitating the realization of an ultra-thin, wide-angle design for the imaging optical lens 10. More preferably, -4.56 ≤ f3 / f ≤ -1.95. Conditional formula (17) specifies the ratio of the on-axis thickness d5 of the third lens L3 to the total system length TTL of the imaging optical lens 10. Within the range defined by the conditional formula, it is beneficial to reasonably control the total system length TTL of the imaging optical lens 10 and realize the ultra-thin design of the imaging optical lens 10. More preferably, 0.03≤d5 / TTL≤0.09.

[0062] In this embodiment, the object-side surface of the fourth lens element L4 is convex at the paraxial direction, and the image-side surface is convex at the paraxial direction, and the fourth lens element L4 has positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the fourth lens element L4 may be arranged with other concave-convex distributions, and the fourth lens element L4 may also have negative refractive power.

[0063] Preferably, the object side surface curvature radius of the fourth lens L4 is R7, the image side surface curvature radius of the fourth lens L4 is R8, the focal length of the fourth lens L4 is f4, the focal length of the camera optical lens 10 is f, the axial thickness of the fourth lens L4 is d7, the total system length of the camera optical lens 10 is TTL, and the following relationships are satisfied: 0.00≤(R7+R8) / (R7-R8)≤0.90 (18) 0.61≤f4 / f≤2.69 (19) 0.03≤d7 / TTL≤0.27 (20)

[0064] Conditional formula (18) specifies the shape of the fourth lens L4. Within the above range, the degree of deflection of light passing through the fourth lens L4 is alleviated, so that the imaging optical lens 10 has better imaging quality and lower sensitivity. More preferably, 0.00≤(R7+R8) / (R7-R8)≤0.72. Conditional formula (19) specifies the ratio of the focal length f4 of the fourth lens L4 to the focal length f of the imaging optical lens 10, which reasonably allocates the internal focal length of the imaging optical lens 10, so that the imaging optical lens 10 has better imaging quality and lower sensitivity. More preferably, 0.98≤f4 / f≤2.15. Conditional formula (20) specifies the ratio of the on-axis thickness d7 of the fourth lens L4 to the total system length TTL of the imaging optical lens 10. Within this range, the total system length TTL of the imaging optical lens 10 can be effectively compressed, thereby achieving an ultra-thin design of the imaging optical lens 10. More preferably, 0.05≤d7 / TTL≤0.21.

[0065] In this embodiment, the object-side surface of the fifth lens element L5 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction, and the fifth lens element L5 has positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the fifth lens element L5 may be arranged with other concave-convex distributions, and the fifth lens element L5 may also have negative refractive power.

[0066] Preferably, the object side surface curvature radius of the fifth lens L5 is R9, the image side surface curvature radius of the fifth lens L5 is R10, the focal length of the fifth lens L5 is f5, the focal length of the camera optical lens 10 is f, the axial thickness of the fifth lens L5 is d9, the total system length of the camera optical lens is TTL, and the following relationships are satisfied: -17.54≤(R9+R10) / (R9-R10)≤-1.95 (21) 4.38≤f5 / f≤45.60 (22) 0.06≤d9 / TTL≤0.36 (23)

[0067] Conditional formula (21) specifies the shape of the fifth lens L5. Within the above-defined range, it helps improve the optical performance of the camera optical lens 10. More preferably, -10.96≤(R9+R10) / (R9-R10)≤-2.44. Conditional formula (22) specifies the ratio of the focal length f5 of the fifth lens L5 to the focal length f of the camera optical lens 10. Within the range defined by the conditional formula, it helps improve the optical performance of the camera optical lens 10. More preferably, 7.01≤f5 / f≤36.48. Conditional formula (23) specifies the on-axis thickness d9 of the fifth lens L5 and the total system length TTL of the camera optical lens 10, which is conducive to achieving an ultra-thin design. More preferably, 0.10≤d9 / TTL≤0.29.

[0068] In this embodiment, the object-side surface of the sixth lens element L6 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction, and the sixth lens element L6 has positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the sixth lens element L6 may be arranged with other concave-convex distributions, and the sixth lens element L6 may also have negative refractive power.

[0069] Preferably, the object side surface curvature radius of the sixth lens L6 is R11, the image side surface curvature radius of the sixth lens L6 is R12, the focal length of the sixth lens L6 is f6, the focal length of the camera optical lens 10 is f, the axial thickness of the sixth lens L6 is d11, the total system length of the camera optical lens 10 is TTL, and the following relationships are satisfied: -5.98≤(R11+R12) / (R11-R12)≤-1.50 (24) 0.92≤f6 / f≤4.36 (25) 0.02≤d11 / TTL≤0.14 (26)

[0070] Conditional formula (24) specifies the shape of the sixth lens L6. Within the above range, it helps to correct the aberration of the off-axis picture angle generated by the ultra-thin wide-angle design of the camera optical lens 10. More preferably, -3.74≤(R11+R12) / (R11-R12)≤-1.87. Conditional formula (25) specifies the ratio range of the focal length f6 of the sixth lens L6 to the focal length f of the camera optical lens 10. Within this range, the internal focal length of the camera optical lens 10 is reasonably distributed, so that the camera optical lens 10 has better imaging quality and lower sensitivity. More preferably, 1.48≤f6 / f≤3.49. Conditional formula (26) limits the ratio range of the on-axis thickness d11 of the sixth lens L6 to the total system length TTL of the camera optical lens 10, which helps to achieve the ultra-thin design of the camera optical lens 10. More preferably, 0.03≤d11 / TTL≤0.11.

[0071] Preferably, the F number of the camera optical lens 10 is FNO and also satisfies the following conditional formula: FNO≤1.30 (27)

[0072] Conditional formula (27) specifies the F number of the aperture of the camera optical lens 10. Within the range defined by conditional formula (27), while miniaturizing the design of the camera optical lens 10, a greater amount of light can be input, thereby improving the range of the camera optical lens 10, improving the ability of the camera optical lens 10 to resist ambient light, and ensuring that the camera optical lens 10 has a good reception effect.

[0073] In this embodiment, the first lens L1 is made of glass, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of glass, the fifth lens L5 is made of plastic, and the sixth lens L6 is made of plastic. In other optional embodiments, each lens may also be made of other materials.

[0074] In this embodiment, an optical element such as an optical filter GF is disposed between the sixth lens L6 and the imaging surface Si. The optical filter GF may be a glass cover or an optical filter. As shown in FIG1 , a first optical filter GF1 and a second optical filter GF2 are disposed between the sixth lens L6 and the imaging surface Si. In other embodiments, the optical filter GF may be disposed in other locations.

[0075] The camera optical lens 10 of the present application has good optical performance, a large aperture, miniaturization, and good reception effect. According to the optical characteristics of the camera optical lens 10, the camera optical lens 10 is particularly suitable for detection devices or equipment such as vehicle-mounted laser radar.

[0076] The following examples illustrate the camera optical lens 10 of the present application. The symbols recorded in each example are as shown in Table [1], and the units of focal length, on-axis distance, curvature radius, on-axis thickness, inflection point position, and stationary point position are millimeters.

[0077] TTL: total optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), in millimeters.

[0078] Preferably, an inflection point and / or a stagnation point may be further provided on the object side and / or image side of the lens to meet high-quality imaging requirements. For specific possible implementation plans, see the following content.

[0079] 1 is a schematic structural diagram of an imaging optical lens 10 in a first embodiment. The following shows design data of the imaging optical lens 10 in the first embodiment of the present application.

[0080] Table 1 lists the object-side and image-side curvature radii R, on-axis thicknesses, on-axis distances d between lenses, refractive indices nd, and Abbe numbers vd of the first through sixth lenses L1, L6, and L7 constituting the imaging optical lens system 10 in the first embodiment of the present application. Table 2 shows the conic coefficient k and aspheric coefficients of the imaging optical lens system 10. It should be noted that in this embodiment, the units of distances, radii, and thicknesses are all in millimeters (mm).

[0081]

Table 1

[0082] The meanings of the symbols in the above table are as follows.

[0083] R: The curvature radius of the optical surface, or the central curvature radius of the lens;

[0084] S1: aperture;

[0085] R1: the radius of curvature of the object-side surface of the first lens L1;

[0086] R2: the radius of curvature of the image-side surface of the first lens L1;

[0087] R3: radius of curvature of the object-side surface of the second lens L2;

[0088] R4: the radius of curvature of the image-side surface of the second lens L2;

[0089] R5: radius of curvature of the object-side surface of the third lens L3;

[0090] R6: radius of curvature of the image-side surface of the third lens L3;

[0091] R7: radius of curvature of the object-side surface of the fourth lens L4;

[0092] R8: radius of curvature of the image-side surface of the fourth lens L4;

[0093] R9: radius of curvature of the object-side surface of the fifth lens element L5;

[0094] R10: radius of curvature of the image-side surface of the fifth lens L5;

[0095] R11: radius of curvature of the object-side surface of the sixth lens L6;

[0096] R12: radius of curvature of the image-side surface of the sixth lens L6;

[0097] R15: radius of curvature of the object-side surface of the first optical filter GF1;

[0098] R16: radius of curvature of the image side surface of the first optical filter GF1;

[0099] R17: radius of curvature of the object-side surface of the second optical filter GF2;

[0100] R18: radius of curvature of the image side surface of the second optical filter GF2;

[0101] d: the on-axis thickness of the lens or the on-axis distance between adjacent lenses;

[0102] d0: the on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0103] d1: axial thickness of the first lens L1;

[0104] d2: the on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

[0105] d3: axial thickness of the second lens L2;

[0106] d4: the on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0107] d5: axial thickness of the third lens L3;

[0108] d6: the on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

[0109] d7: axial thickness of the fourth lens L4;

[0110] d8: the on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0111] d9: axial thickness of the fifth lens L5;

[0112] d10: the on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0113] d11: axial thickness of sixth lens L6;

[0114] d12: the on-axis distance between the image-side surface of the sixth lens L6 and the object-side surface of the first optical filter GF1;

[0115] d13: axial thickness of the first optical filter GF1;

[0116] d14: the on-axis distance from the image-side surface of the first optical filter GF1 to the object-side surface of the second optical filter GF2;

[0117] d15: axial thickness of the second optical filter GF2;

[0118] d16: the on-axis distance from the image side surface of the second optical filter GF2 to the image plane Si;

[0119] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0120] nd1: refractive index of the first lens L1;

[0121] nd2: the refractive index of the second lens L2;

[0122] nd3: the refractive index of the third lens L3;

[0123] nd4: the refractive index of the fourth lens L4;

[0124] nd5: the refractive index of the fifth lens L5;

[0125] nd6: the refractive index of the sixth lens L6;

[0126] ndg1: refractive index of the first optical filter GF1;

[0127] ndg2: refractive index of the second optical filter GF2;

[0128] vd: Abbe number;

[0129] vd1: Abbe number of the first lens L1;

[0130] vd2: Abbe number of the second lens L2;

[0131] vd3: Abbe number of the third lens L3;

[0132] vd4: Abbe number of the fourth lens L4;

[0133] vd5: Abbe number of the fifth lens L5;

[0134] vd6: Abbe number of sixth lens L6;

[0135] vg1: Abbe number of the first optical filter GF1;

[0136] vg2: Abbe number of the second optical filter GF2.

[0137]

Table 2

[0138] It should be noted that the aspheric surface of each lens in this embodiment uses the aspheric surface shown in the following conditional formula (28). However, the specific form of the following conditional formula (28) is only an example. In fact, this application is not limited to the aspheric polynomial form expressed in the conditional formula (28). 2 / r) / [1+{1-(k+1)(c 2 / r 2 )} 1 / 2 ]+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 + A18r 18 +A20r 20 (28)

[0139] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 are the aspheric coefficients. c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between the point r from the optical axis and the tangent plane tangent to the vertex on the aspheric surface).

[0140] Tables 3 and 4 show the design data for the inflection points and stagnation points of each lens in the imaging optical lens system 10 according to an embodiment of the present application. P1R1 and P1R2 represent the object-side and image-side surfaces of the first lens L1, respectively; P2R1 and P2R2 represent the object-side and image-side surfaces of the second lens L2, respectively; P3R1 and P3R2 represent the object-side and image-side surfaces of the third lens L3, respectively; P4R1 and P4R2 represent the object-side and image-side surfaces of the fourth lens L4, respectively; P5R1 and P5R2 represent the object-side and image-side surfaces of the fifth lens L5, respectively; and P6R1 and P6R2 represent the object-side and image-side surfaces of the sixth lens L6, respectively. The data corresponding to the "Inflection Point Position" column represents the vertical distance from the inflection point provided on each lens surface to the optical axis of the imaging optical lens system 10. The data corresponding to the "Stagnation Point Position" column represents the vertical distance from the stagnation point provided on each lens surface to the optical axis of the imaging optical lens system 10.

[0141]

Table 3

[0142]

Table 4

[0143] In addition, the following Table 25 also lists the values ​​corresponding to the various parameters in the first embodiment and the parameters specified in the conditional expressions.

[0144] Figure 2 shows a schematic diagram of field curvature and distortion of light with a wavelength of 850 nanometers after passing through the camera optical lens 10 of the first embodiment; Figure 3 shows a schematic diagram of magnification chromatic aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 10 of the first embodiment; Figure 4 shows a schematic diagram of axial aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 10 of the first embodiment.

[0145] As shown in Table 25, the first embodiment satisfies each conditional expression.

[0146] In this embodiment, the entrance pupil diameter of the camera optical lens 10 is 2.237 mm, the full field of view image height is 3.300 mm, and the diagonal field of view is 148.20°. The camera optical lens 10 meets the characteristics of large aperture and miniaturization, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0147] Second embodiment:

[0148] FIG5 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.

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

[0150]

Table 5

[0151]

Table 6

[0152] Tables 7 and 8 show the inflection point and stagnation point design data of each lens in the imaging optical lens 20 according to the second embodiment of the present application.

[0153]

Table 7

[0154]

Table 8

[0155] In addition, the following Table 25 also lists the values ​​corresponding to the various parameters in the second embodiment and the parameters specified in the conditional expressions.

[0156] Figure 6 shows a schematic diagram of field curvature and distortion of light with a wavelength of 850 nanometers after passing through the camera optical lens 20 of the second embodiment; Figure 7 shows a schematic diagram of magnification chromatic aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 20 of the second embodiment; Figure 8 shows a schematic diagram of axial aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 20 of the second embodiment.

[0157] As shown in Table 25, the second embodiment satisfies each conditional expression.

[0158] In this embodiment, the entrance pupil diameter of the camera optical lens 20 is 2.112 mm, the full field of view image height is 3.300 mm, and the diagonal field of view is 156.40°. The camera optical lens 20 meets the characteristics of large aperture and miniaturization, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0159] Third embodiment:

[0160] FIG9 is a schematic structural diagram of a camera optical lens 30 in a third embodiment. The third 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.

[0161] The object-side surface of the first lens L1 is concave at the paraxial position.

[0162] Tables 9 and 10 show design data of the imaging optical lens 30 according to the third embodiment of the present application.

[0163]

Table 9

[0164]

Table 10

[0165] Tables 11 and 12 show the inflection point and stagnation point design data of each lens in the imaging optical lens 30 according to the third embodiment of the present application.

[0166]

Table 11

[0167]

Table 12

[0168] In addition, the following Table 25 also lists the values ​​corresponding to the various parameters in the third embodiment and the parameters specified in the conditional expressions.

[0169] Figure 10 shows a schematic diagram of field curvature and distortion of light with a wavelength of 850 nanometers after passing through the camera optical lens 30 of the third embodiment; Figure 11 shows a schematic diagram of magnification chromatic aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 30 of the third embodiment; Figure 12 shows a schematic diagram of axial aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 30 of the third embodiment.

[0170] As shown in Table 25, the third embodiment satisfies each conditional expression.

[0171] In this embodiment, the entrance pupil diameter of the camera optical lens 30 is 2.750 mm, the full field of view image height is 3.300 mm, and the diagonal field of view is 115.88°. The camera optical lens 30 meets the characteristics of large aperture and miniaturization, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0172] Fourth embodiment:

[0173] FIG13 is a schematic structural diagram of a camera optical lens 40 in a fourth embodiment. The fourth 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.

[0174] Tables 13 and 14 show design data of the imaging optical lens 40 according to the fourth embodiment of the present application.

[0175]

Table 13

[0176]

Table 14

[0177] Table 15 and Table 16 show the inflection point and stagnation point design data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present application.

[0178]

Table 15

[0179] Table 16

[0180] In addition, the following Table 25 also lists the values ​​corresponding to the various parameters in the fourth embodiment and the parameters specified in the conditional expressions.

[0181] Figure 14 shows a schematic diagram of field curvature and distortion of light with a wavelength of 850 nanometers after passing through the camera optical lens 40 of the fourth embodiment; Figure 15 shows a schematic diagram of magnification chromatic aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 40 of the fourth embodiment; Figure 16 shows a schematic diagram of axial aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 40 of the fourth embodiment.

[0182] As shown in Table 25, the fourth embodiment satisfies each conditional expression.

[0183] In this embodiment, the entrance pupil diameter of the camera optical lens 40 is 2.157 mm, the full field of view image height is 3.300 mm, and the diagonal field of view is 143.88°. The camera optical lens 40 meets the characteristics of large aperture and miniaturization, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0184] Fifth embodiment:

[0185] FIG17 is a schematic structural diagram of a camera optical lens 50 in a fifth embodiment. The fifth 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.

[0186] Tables 17 and 18 show design data of the imaging optical lens 50 according to the fifth embodiment of the present application.

[0187] Table 17

[0188] Table 18

[0189] Tables 19 and 20 show the inflection point and stationary point design data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present application.

[0190] Table 19

[0191] Table 20

[0192] In addition, the following Table 25 also lists the values ​​corresponding to the various parameters in the fifth embodiment and the parameters specified in the conditional expressions.

[0193] Figure 18 shows a schematic diagram of field curvature and distortion of light with a wavelength of 850 nanometers after passing through the camera optical lens 50 of the fifth embodiment; Figure 19 shows a schematic diagram of magnification chromatic aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 50 of the fifth embodiment; Figure 20 shows a schematic diagram of axial aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 50 of the fifth embodiment.

[0194] As shown in Table 25, the fifth embodiment satisfies each conditional expression.

[0195] In this embodiment, the entrance pupil diameter of the camera optical lens 50 is 2.187 mm, the full field of view image height is 3.300 mm, and the diagonal field of view is 155.20°. The camera optical lens 50 meets the characteristics of large aperture and miniaturization, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0196] Comparative implementation method:

[0197] FIG21 is a schematic structural diagram of a camera optical lens 60 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.

[0198] Tables 21 and 22 show the design data of the imaging optical lens 60 according to the comparative embodiment.

[0199] Table 22

[0200] Table 23 and Table 24 show the design data of the inflection point and the stagnation point of each lens in the imaging optical lens 60 of the comparative embodiment.

[0201] Table 23

[0202] Table 24

[0203] Figure 22 shows a schematic diagram of astigmatism, field curvature and distortion of light with a wavelength of 850 nanometers after passing through the camera optical lens 60 of the comparative embodiment; Figure 23 shows a schematic diagram of magnification chromatic aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 60 of the comparative embodiment; Figure 24 shows a schematic diagram of axial aberration of light with wavelengths of 830 nanometers, 850 nanometers and 870 nanometers after passing through the camera optical lens 60 of the comparative embodiment.

[0204] Table 25 lists the values ​​corresponding to the conditional expressions in the comparative embodiment according to the above conditions. Obviously, the imaging optical lens 60 of the comparative embodiment does not satisfy the conditional expression nd1≥1.70.

[0205] In the comparative embodiment, the entrance pupil diameter of the camera optical lens 60 is 2.463 mm, the full field image height is 3.300 mm, and the diagonal field of view is 133.90°. The camera optical lens 60 does not have excellent optical characteristics, and its on-axis and off-axis chromatic aberrations are not fully corrected.

[0206] Table 25

[0207] The above is a detailed introduction to the camera optical lens provided in the embodiment of the present application. Specific examples are used herein to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the ideas of the present application. There may be changes in the specific embodiments and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A camera optical lens, comprising, from the object side to the image side, the following: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the refractive index of the first lens is nd1, 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 conditions are satisfied: nd1≥1.70; (FOV*f) / IH≥120.

00.

2. The imaging optical lens according to claim 1, wherein: The radius of curvature of the object side surface of the third lens is R5, and the radius of curvature of the image side surface of the third lens is R6, and the following condition is satisfied: -5.00≤R5 / R6≤-1.

20.

3. The imaging optical lens according to claim 1, wherein: The radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, and the following condition is satisfied: -4.00≤R7 / R8≤-1.

00.

4. The imaging optical lens according to claim 1, wherein: The on-axis thickness of the fifth lens is d9, the on-axis thickness of the sixth lens is d11, and the following condition is satisfied: 1.40≤d9 / d11≤5.

00.

5. The imaging optical lens according to claim 1, wherein: The combined focal length of the first lens and the second lens is f12, and satisfies the following condition: -6.00≤f12 / f≤-1.

20.

6. The imaging optical lens according to claim 1, wherein: The field of view FOV and focal length f of the camera optical lens also satisfy the following relationship: (FOV*f) / IH≤150.

00.

7. The imaging optical lens according to claim 1, wherein: The first lens has negative refractive power, and its image side surface is concave at the paraxial position; the radius of curvature of the object side surface of the first lens is R1, the radius of curvature 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, the total system length of the camera optical lens is TTL, and satisfies the following relationships: 0.33≤(R1+R2) / (R1-R2)≤1.97; -3.54≤f1 / f≤-0.54; 0.02≤d1 / TTL≤0.

22.

8. The imaging optical lens according to claim 1, wherein: The second lens has positive refractive power, its object side surface is concave at the paraxial position, and its image side surface is convex at the paraxial position; 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 second lens is f2, the axial thickness of the second lens is d3, the total system length of the camera optical lens is TTL, and satisfies the following relationships: 0.54≤(R3+R4) / (R3-R4)≤1.71; 1.66≤f2 / f≤5.87; 0.02≤d3 / TTL≤0.

09.

9. The imaging optical lens according to claim 1, wherein: The third lens has negative refractive power, its object side surface is concave at the paraxial position, and its image side surface is concave at the paraxial position; the object side surface curvature radius of the third lens is R5, the image side surface curvature radius of the third lens is R6, the focal length of the third lens is f3, the axial thickness of the third lens is d5, the total system length of the camera optical lens is TTL, and satisfies the following relationship: 0.05≤(R5+R6) / (R5-R6)≤1.00; -7.30≤f3 / f≤-1.56; 0.02≤d5 / TTL≤0.

12.

10. The imaging optical lens according to claim 1, wherein: The fourth lens has positive refractive power, its object side surface is convex at the paraxial position, and its image side surface is convex at the paraxial position; the object side surface curvature radius of the fourth lens is R7, the image side surface curvature radius of the fourth lens is R8, the focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, the total system length of the camera optical lens is TTL, and satisfies the following relationship: 0.00≤(R7+R8) / (R7-R8)≤0.90; 0.61≤f4 / f≤2.69; 0.03≤d7 / TTL≤0.

27.

11. The imaging optical lens according to claim 1, wherein: The fifth 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 object side surface curvature radius of the fifth lens is R9, the image side surface curvature radius of the fifth lens is R10, the focal length of the fifth lens is f5, the axial thickness of the fifth lens is d9, the total system length of the camera optical lens is TTL, and satisfies the following relationship: -17.54≤(R9+R10) / (R9-R10)≤-1.95; 4.38≤f5 / f≤45.60; 0.06≤d9 / TTL≤0.

36.

12. The imaging optical lens according to claim 1, wherein: The sixth 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 object side surface radius of the sixth lens is R11, the image side surface radius of the sixth lens is R12, the focal length of the sixth lens is f6, the axial thickness of the sixth lens is d11, the total system length of the camera optical lens is TTL, and satisfies the following relationship: -5.98≤(R11+R12) / (R11-R12)≤-1.50; 0.92≤f6 / f≤4.36; 0.02≤d11 / TTL≤0.

14.

13. The imaging optical lens according to claim 1, wherein: The fourth lens is made of glass.

Images