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 six lenses which are sequentially a first lens with negative refraction power, a second lens with positive refraction power, a third lens with positive refraction power and a fourth lens with negative refraction power from an object side to an image side, a fifth lens element with positive refractive power; and a sixth lens element with negative refractive power. Through the configuration mode of the lenses, the shooting optical lens has the advantages of being large in aperture, wide in angle, ultrathin and good in optical performance, the total optical length of the shooting optical lens can be controlled, the focal length of the lens is reasonably distributed, the deflection degree of light passing through the lens is relieved, astigmatism and distortion are effectively corrected, chromatic aberration is corrected, aberration is reduced, 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 aberrations, which is not conducive to high-quality imaging and is difficult to meet the design requirements of large aperture, wide angle, and ultra-thinness. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a camera optical lens with a large aperture, wide angle, ultra-thinness and good optical performance, which can control the total optical length of the camera optical lens, reasonably distribute the focal length of the lens, alleviate the degree of deflection of light passing through the lens, effectively correct astigmatism and distortion, correct chromatic aberration, reduce aberrations, and improve imaging effects.

[0005] To solve the above technical problems, an embodiment of the present invention provides a camera optical lens, which comprises six lenses in total, and the six lenses are, from the object side to the image side, in order: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power; the object side surface of the first lens is concave 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 convex at the paraxial position, and the image side surface of the third lens is convex at the paraxial position; the object side surface of the fourth lens is concave at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; the object side surface of the fifth lens is concave at the paraxial position, and the image side surface of the fifth lens is convex at the paraxial position; the object side surface of the sixth lens is convex at the paraxial position, The image side surface of the sixth lens is concave at the paraxial position; 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, the axial spacing between the image side surface of the first lens and the object side surface of the second lens is d2, the axial thickness of the second lens is d3, the central curvature radius of the object side surface of the fifth lens is R9, the image side surface of the fifth lens is The central curvature radius is R10, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -0.40≤(R1+R2) / (R1-R2)≤0.00; 0.20≤(d1+d2+d3) / TTL≤0.30; -1.80≤(f5-f6) / f1≤-1.20; 1.00≤(R9+R10) / (R9-R10)≤1.20.

[0006] Optionally, the focal length of the second lens is f2, the focal length of the third lens is f3, and the following relationship is satisfied: 1.20≤f2 / f3≤3.00.

[0007] Optionally, the image height of 1.0 field of view of the camera optical lens is IH, the focal length of the camera optical lens is f, and the following relationship is satisfied: 0.80≤IH*f / TTL≤1.50.

[0008] Optionally, the focal length of the camera optical lens is f, and also satisfies the following relationship: -1.67≤f1 / f≤-1.43; 0.05≤d1 / TTL≤0.09.

[0009] Optionally, the focal length of the camera optical lens is f, the focal length of the second lens is f2, and the following relationship is satisfied: -4.02≤(R3+R4) / (R3-R4)≤-2.03; 2.20≤f2 / f≤4.28; 0.10≤d3 / TTL≤0.14.

[0010] Optionally, the focal length of the camera optical lens is f, the central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side 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: 0.07≤(R5+R6) / (R5-R6)≤0.30; 1.20≤f3 / f≤1.83; 0.08≤d5 / TTL≤0.11.

[0011] Optionally, the focal length of the camera optical lens is f, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side 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: 0.74≤(R7+R8) / (R7-R8)≤0.98; -3.56≤f4 / f≤-2.31; 0.04≤d7 / TTL≤0.06.

[0012] Optionally, the focal length of the camera optical lens is f, the axial thickness of the fifth lens is d9, and the following relationship is satisfied: 0.70≤f5 / f≤0.97; 0.19≤d9 / TTL≤0.23.

[0013] Optionally, the focal length of the camera optical lens is f, the central curvature radius of the object side of the sixth lens is R11, the central curvature radius of the image side of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the following relationship is satisfied: 2.76≤(R11+R12) / (R11-R12)≤3.12; -1.86≤f6 / f≤-1.09; 0.07≤d11 / TTL≤0.09.

[0014] Optionally, the image height of 1.0 field of view of the camera optical lens is IH, and satisfies the following relationship: 1.60≤TTL / IH≤1.94.

[0015] The beneficial effects of the present invention are as follows: through the configuration of the above-mentioned lenses, a camera optical lens with a large aperture, wide angle, ultra-thinness and good optical performance is provided, which can control the total optical length of the camera optical lens, reasonably distribute the focal length of the lens, alleviate the degree of deflection of light passing through the lens, effectively correct astigmatism and distortion, correct chromatic aberration, reduce aberrations, and improve imaging effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0019] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0020] Figure 4 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0021] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0022] Figure 6 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0023] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0024] Figure 8 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0025] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0026] Fig.10 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0027] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0028] Fig.12 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0029] Fig.13 is a schematic structural diagram of a camera optical lens according to a fourth embodiment of the present invention;

[0030] Fig.14 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0031] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0032] Fig.16 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0033] Fig.17 is a schematic structural diagram of an imaging optical lens according to a fifth embodiment of the present invention;

[0034] Fig.18 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0035] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0036] Fig. 20 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0037] Fig.21 is a schematic structural diagram of a camera optical lens according to a sixth embodiment of the present invention;

[0038] Fig. 22 yes Fig.21 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0039] Fig.23 yes Fig.21 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0040] Fig.24 yes Fig.21 Schematic diagram of axial aberration of the camera optical lens shown;

[0041] Fig.25 is a schematic structural diagram of a camera optical lens according to a comparative implementation mode;

[0042] Fig.26 yes Fig.25 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0043] Fig. 27 yes Fig.25 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0044] Fig.28 yes Fig.25Schematic diagram of axial aberration of the camera optical lens shown. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments 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 can be understood 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.

[0046] 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. The camera optical lens 10, 20, 30, 40, 50, 60 comprises six lenses in total. Specifically, the camera optical lens comprises a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with positive refractive power, and a sixth lens L6 with negative refractive power, which are arranged in sequence from the object side to the image side. The object side surface of the first lens L1 is concave 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 convex at the paraxial position, and the image side surface of the third lens L3 is convex at the paraxial position; the object side surface of the fourth lens L4 is concave at the paraxial position, and the image side surface of the fourth lens L4 is concave at the paraxial position; the object side surface of the fifth lens L5 is concave at the paraxial position, and 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.

[0047] The central curvature radius of the object side surface of the first lens L1 is R1, the central curvature radius of the image side surface of the first lens L1 is R2, the focal length of the first lens L1 is f1, the axial thickness of the first lens L1 is d1, the axial distance between the image side surface of the first lens L1 and the object side surface of the second lens L2 is d2, the axial thickness of the second lens L3 is d3, the central curvature radius of the object side surface of the fifth lens L5 is R9, the central curvature radius of the image side surface of the fifth lens L5 is R10, the focal length of the fifth lens L5 is f5, the focal length of the sixth lens L6 is f6, the total optical length of the camera optical lenses 10, 20, 30, 40, 50, 60 is TTL, and the following relationship is satisfied:

[0048] -0.40≤(R1+R2) / (R1-R2)≤0.00 (1)

[0049] 0.20≤(d1+d2+d3) / TTL≤0.30 (2)

[0050] -1.80≤(f5-f6) / f1≤-1.20 (3)

[0051] 1.00≤(R9+R10) / (R9-R10)≤1.20 (4)

[0052] The conditional expression (1) specifies the shape of the first lens L1. Within the range defined by the conditional expression (1), it is beneficial to correct the astigmatism and distortion of the camera optical lenses 10, 20, 30, 40, 50, 60, so that the distortion value |distortion|≤8.5%, thereby reducing the possibility of generating vignetting.

[0053] Conditional formula (2) specifies the ratio of the distance from the object side surface of the first lens L1 to the image side surface of the second lens L2 to the total optical length TTL of the imaging optical lens. Within this range, it helps to compress the total optical length TTL of the imaging optical lens 10, 20, 30, 40, 50, 60 and achieve an ultra-thin design.

[0054] Conditional expression (3) defines the relationship between the focal length f1 of the first lens L1, the focal length f5 of the fifth lens L5, and the focal length f6 of the sixth lens L6. Within the range of the conditional expression, by reasonably allocating the focal lengths of the imaging optical lenses 10, 20, 30, 40, 50, 60, the imaging optical lenses 10, 20, 30, 40, 50, 60 have better imaging quality and lower sensitivity.

[0055] The conditional expression (4) defines the shape of the fifth lens element L5. Within the range of the conditional expression, the degree of deflection of light passing through the fifth lens element L5 can be alleviated, and aberrations can be effectively reduced.

[0056] The focal length of the second lens is defined as f2, the focal length of the third lens is defined as f3, and the following relationship is satisfied:

[0057] 1.20≤f2 / f3≤3.00 (5)

[0058] Conditional formula (5) specifies the ratio range of the focal length f2 of the second lens L2 and the focal length f3 of the third lens L3. Within the range of the conditional formula, by reasonably allocating the focal lengths of the camera optical lenses 10, 20, 30, 40, 50, 60, the camera optical lenses 10, 20, 30, 40, 50, 60 have better imaging quality and lower sensitivity. The image height of the camera optical lens 1.0 field of view is defined as IH, the focal length of the camera optical lens is f, and the following relationship is satisfied:

[0059] 0.80≤IH*f / TTL≤1.50 (6)

[0060] Within the range of conditional formula (6), the total optical length of the camera optical lenses 10, 20, 30, 40, 50, 60 can be effectively reduced, which is conducive to the miniaturization design of the camera optical lenses 10, 20, 30, 40, 50, 60, and at the same time, it is easy to correct distortion and axial chromatic aberration and aberration, thereby maintaining the good optical performance of the camera optical lenses 10, 20, 30, 40, 50, 60.

[0061] When the above conditions are met, the camera optical lenses 10, 20, 30, 40, 50, 60 have good optical performance and can meet the design requirements of large aperture, wide angle and ultra-thinness; according to the characteristics of the camera optical lenses 10, 20, 20, 30, 40, 50, 60, the camera optical lenses 10, 20, 30, 40, 50, 60 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0062] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[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 focal length of the camera optical lens is defined as f, and the following relationship is also satisfied:

[0065] -1.67≤f1 / f≤-1.43 (7)

[0066] 0.05≤d1 / TTL≤0.09 (8)

[0067] Conditional formula (7) defines the ratio range of the focal length f1 of the first lens L1 to the focal length f of the imaging optical lens 10, 20, 30, 40, 50, 60. Within this range, it is helpful to improve the optical performance of the imaging optical lens 10, 20, 30, 40, 50, 60. Conditional formula (8) defines the ratio range of the axial thickness d1 of the first lens L1 to the total optical length TTL of the imaging optical lens 10, 20, 30, 40, 50, 60. Within this range, it is helpful to control the total optical length TTL of the imaging optical lens 10, 20, 30, 40, 50, 60.

[0068] The focal length of the camera optical lens is defined as f, 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:

[0069] -4.02≤(R3+R4) / (R3-R4)≤-2.03 (9)

[0070] 2.20≤f2 / f≤4.28 (10)

[0071] 0.10≤d3 / TTL≤0.14 (11)

[0072] Conditional formula (9) defines the shape of the second lens L2. Within this range, the degree of deflection of light passing through the second lens L2 can be reduced, effectively reducing aberrations. Conditional formula (10) 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. Within this range, it is helpful to reduce aberrations and improve imaging quality. Conditional formula (11) defines the axial thickness d3 of the second lens L2. Within this range, the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60 can be effectively compressed, which is conducive to achieving a miniaturized design.

[0073] The focal length of the camera optical lens is defined as f, 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, the axial thickness of the third lens L3 is defined as d5, and the following relationship is satisfied:

[0074] 0.07≤(R5+R6) / (R5-R6)≤0.30 (12)

[0075] 1.20≤f3 / f≤1.83 (13)

[0076] 0.08≤d5 / TTL≤0.11 (14)

[0077] Conditional formula (12) defines the shape of the third lens L3. Within this range, it is helpful to improve the imaging quality. Conditional formula (13) defines the focal length f3 of the third lens L3. Within this range, it is possible to improve the optical performance of the camera optical lens 10, 20, 30, 40, 50, 60 and help reduce aberrations. Conditional formula (14) defines the axial thickness d5 of the third lens L3. Within this range, it is helpful to control the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60.

[0078] The focal length of the camera optical lens is defined as f, the central curvature radius of the object side surface of the fourth lens L4 is defined as R7, the central curvature radius of the image side surface of the fourth lens L4 is defined as R8, the focal length of the fourth lens L4 is defined as f4, the axial thickness of the fourth lens L4 is defined as d7, and the following relationship is satisfied:

[0079] 0.74≤(R7+R8) / (R7-R8)≤0.98 (15)

[0080] -3.56≤f4 / f≤-2.31 (16)

[0081] 0.04≤d7 / TTL≤0.06 (17)

[0082] Conditional formula (15) defines the shape of the fourth lens L4, within which the spherical aberration of the camera optical lens 10, 20, 30, 40, 50, 60 can be effectively corrected, thereby improving the imaging quality. Conditional formula (16) defines the focal length f4 of the fourth lens L4, within which the optical performance of the camera optical lens 10, 20, 30, 40, 50, 60 can be improved. Conditional formula (17) defines the axial thickness d7 of the fourth lens L4, within which the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60 can be controlled, thereby facilitating miniaturization design.

[0083] The focal length of the camera optical lens is defined as f, the axial thickness of the fifth lens is defined as d9, and the following relationship is satisfied:

[0084] 0.70≤f5 / f≤0.97 (18)

[0085] 0.19≤d9 / TTL≤0.23 (19)

[0086] The conditional formula (18) defines the focal length f5 of the fifth lens L5, which is beneficial to reducing aberrations and improving imaging quality within this range. The conditional formula (19) defines the axial thickness d9 of the fifth lens L5, which is beneficial to compressing the total optical length TTL of the camera optical lenses 10, 20, 30, 40, 50, 60 within this range.

[0087] The focal length of the camera optical lens is defined as f, the central curvature radius of the object side surface of the sixth lens L6 is defined as R11, the central curvature radius of the image side surface of the sixth lens L6 is defined as R12, and the axial thickness of the sixth lens L6 is defined as d11, and the following relationship is satisfied:

[0088] 2.76≤(R11+R12) / (R11-R12)≤3.12 (20)

[0089] -1.86≤f6 / f≤-1.09 (21)

[0090] 0.07≤d11 / TTL≤0.09 (22)

[0091] Conditional formula (20) defines the shape of the sixth lens L6. Within this range, the degree of deflection of light passing through the sixth lens L6 can be alleviated, effectively reducing aberrations. Conditional formula (21) 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 beneficial to reducing aberrations. Conditional formula (22) defines the axial thickness d11 of the sixth lens L6. Within this range, it is beneficial to compress the total optical length TTL of the camera optical lens 10, 20, 30, 40, 50, 60 to achieve an ultra-thin design.

[0092] In this solution, the image height of 1.0 field of view of the camera optical lenses 10, 20, 30, 40, 50, 60 is IH, and satisfies the following relationship:

[0093] 1.60≤TTL / IH≤1.94 (23)

[0094] Within this range, the ultra-thin design of the camera optical lenses 10, 20, 30, 40, 50, and 60 can be achieved.

[0095] In this solution, the aperture number of the camera optical lenses 10, 20, 30, 40, 50, and 60 is FNO, and satisfies the following relationship:

[0096] 2.0≤FNO≤2.3 (24)

[0097] Conditional expression (24) specifies the aperture number of the imaging optical lens 10, 20, 30, 40, 50, 60. Under this restriction, it is possible to ensure that the imaging optical lens 10, 20, 30, 40, 50, 60 has a large aperture.

[0098] In this solution, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are all made of plastic. Each lens may also be made of other materials.

[0099] In this solution, the aperture ST of the camera optical lens 10, 20, 30, 40, 50, 60 is set between the second lens L2 and the third lens L3, however, the aperture ST is not limited to being between the second lens L2 and the third lens L3, and can also be set at other positions. In addition, the camera optical lens 10, 20, 30, 40, 50, 60 can also be provided with one or more optical elements such as optical filters GF, wherein the optical filter GF can be a glass cover plate or an optical filter. For example, an optical filter can be provided on the image side of the sixth lens L6.

[0100] The present invention provides a camera optical lens 10, 20, 30, 40, 50, 60 with a large aperture, wide angle, ultra-thinness and good optical performance through the above-mentioned lens configuration method. The camera optical lens 10, 20, 30, 40, 50, 60 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, alleviate the degree of deflection of light passing through the lens, effectively correct astigmatism and distortion, correct chromatic aberration, reduce aberration, and improve imaging effect.

[0101] 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, center curvature radius, on-axis thickness, flip point position, and stationary point position are millimeters.

[0102] TTL: total optical length (the axial distance from the object side of the first lens L1 to the imaging surface), in millimeters;

[0103] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter;

[0104] 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);

[0105] 1.0 Field of view FOV: the field of view angle corresponding to the effective pixels of the sensor;

[0106] 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.

[0107] Next, the technical solution of the present invention is specifically described with six implementation modes. At the same time, a comparative implementation mode is provided as a reference. When the scope of the above conditional formula is exceeded, the technical effect of the present invention cannot be achieved.

[0108] First embodiment:

[0109] 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.

[0110] Table 1 lists the central curvature radius R of the object side and image side of the first lens L1 to the sixth lens L6 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).

[0111]

Table 1

[0112]

[0113]

[0114] The meanings of the symbols in the above table are as follows:

[0115] R: radius of curvature of the optical surface, center radius of curvature for lens; ST: aperture;

[0116] R1: the central curvature radius of the object side of the first lens L1;

[0117] R2: the central curvature radius of the image side surface of the first lens L1;

[0118] R3: the central curvature radius of the object side surface of the second lens L2;

[0119] R4: the central curvature radius of the image side surface of the second lens L2;

[0120] R5: the central curvature radius of the object side surface of the third lens L3;

[0121] R6: the central curvature radius of the image side surface of the third lens L3;

[0122] R7: the central curvature radius of the object side surface of the fourth lens L4;

[0123] R8: the central curvature radius of the image side surface of the fourth lens L4;

[0124] R9: the central curvature radius of the object side surface of the fifth lens L5;

[0125] R10: the central curvature radius of the image side surface of the fifth lens L5;

[0126] R11: central curvature radius of the object side surface of the sixth lens L6;

[0127] R12: central curvature radius of the image side surface of the sixth lens L6;

[0128] R13: radius of curvature of the object side of the optical filter GF;

[0129] R14: radius of curvature of the image side of the optical filter GF;

[0130] d: the axial thickness of the lens, the axial distance between lenses;

[0131] d1: axial thickness of the first lens L1;

[0132] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0133] d3: axial thickness of the second lens L2;

[0134] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0135] d5: axial thickness of the third lens L3;

[0136] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0137] d7: axial thickness of the fourth lens L4;

[0138] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0139] d9: axial thickness of the fifth lens L5;

[0140] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6; d11: the axial thickness of the sixth lens L6;

[0141] d12: the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the optical filter GF; d13: the on-axis thickness of the optical filter GF;

[0142] d14: the axial distance from the image side of the optical filter GF to the image plane Si;

[0143] nd: refractive index of d-line (d-line is green light with a wavelength of 555nm);

[0144] nd1: refractive index of the first lens L1 at the d-line;

[0145] nd2: refractive index of the d-line of the second lens L2;

[0146] nd3: refractive index of the third lens L3 at the d-line;

[0147] nd4: refractive index of the d-line of the fourth lens L4;

[0148] nd5: the refractive index of the fifth lens L5 at the d-line;

[0149] nd6: the refractive index of the d-line of the sixth lens L6;

[0150] ndg: refractive index of the d-line of the optical filter GF;

[0151] vd: Abbe number;

[0152] vd1: Abbe number of the first lens L1;

[0153] vd2: Abbe number of the second lens L2;

[0154] vd3: Abbe number of the third lens L3;

[0155] vd4: Abbe number of the fourth lens L4;

[0156] vd5: Abbe number of the fifth lens L5;

[0157] vd6: Abbe number of sixth lens L6;

[0158] vg: Abbe number of the optical filter GF.

[0159]

Table 2

[0160]

[0161]

[0162] It should be noted that the aspheric surface of each lens in this embodiment uses the aspheric surface shown in the following conditional expression (25), but the specific form of the following conditional expression (25) is only an example. In fact, the present invention is not limited to the aspheric polynomial form indicated in the conditional expression (25).

[0163] z=(c 2 / r) / {1+[1-(k+1)(c 2 / r 2 )] 1 / 2}+A4c 4 +A6c 6 +A8c 8 +A10c 10 +A12c 12 +A14c 14 +A16c 16 +A18c 18 +

[0164] A20c 20 +A22c 22 +A24c 24 +A26c 26 +A28c 28 +A30c 30 (25)

[0165] Among them, k is the cone coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are 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 depth of the aspheric surface (the vertical distance between the point r on the aspheric surface and the tangent plane tangent to the vertex on the aspheric optical axis).

[0166] 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.

[0167] Figure 2 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nanometers after passing through the camera optical lens 10 of the first embodiment. Figure 2 The 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the imaging optical lens 10 of the first embodiment is shown.

[0168] As shown in Table 15, the first embodiment satisfies each conditional expression.

[0169] In this embodiment, the entrance pupil diameter of the camera optical lens 10 is 0.873 mm, the image height IH of 1.0 field of view is 3.201 mm, and the field angle of 1.0 field of view is 119.85°. The camera optical lens 10 meets the characteristics of large aperture, wide angle, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0170] Second embodiment

[0171] 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.

[0172] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0173]

Table 3

[0174]

[0175]

[0176]

Table 4

[0177]

[0178]

[0179] 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.

[0180] Figure 6 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nanometers after passing through the camera optical lens 20 of the second embodiment. Figure 6 The 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the imaging optical lens 20 of the second embodiment is shown.

[0181] As shown in Table 15, the second embodiment satisfies each conditional expression.

[0182] In this embodiment, the entrance pupil diameter of the camera optical lens 20 is 0.928 mm, the image height IH of 1.0 field of view is 3.184 mm, and the field of view angle FOV of 1.0 field of view is 115.67°. The camera optical lens 20 meets the characteristics of large aperture, wide angle, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0183] Third embodiment

[0184] 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.

[0185] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0186]

Table 5

[0187]

[0188]

Table 6

[0189]

[0190]

[0191] 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.

[0192] Fig.10 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nanometers after passing through the camera optical lens 30 of the third embodiment. Fig.10 The 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 of wavelengths of 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the camera optical lens 30 of the third embodiment is shown; Fig.12 A schematic diagram of axial aberrations of wavelengths of 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the imaging optical lens 30 of the third embodiment is shown.

[0193] As shown in Table 15, the third embodiment satisfies each conditional expression.

[0194] In this embodiment, the entrance pupil diameter of the camera optical lens 30 is 0.716 mm, the image height IH of 1.0 field of view is 3.100 mm, and the field of view angle FOV of 1.0 field of view is 129.20°. The camera optical lens 30 meets the characteristics of large aperture, wide angle, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0195] Fourth embodiment

[0196] 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.

[0197] Tables 7 and 8 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0198]

Table 7

[0199]

[0200]

Table 8

[0201]

[0202]

[0203] 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.

[0204] Fig.14 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nanometers after passing through the camera optical lens 40 of the fourth embodiment. Fig.14 The 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the camera optical lens 40 of the fourth embodiment is shown; Fig.16A schematic diagram of axial aberrations of wavelengths of 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the imaging optical lens 40 of the fourth embodiment is shown.

[0205] As shown in Table 15, the fourth embodiment satisfies each conditional expression.

[0206] In this embodiment, the entrance pupil diameter of the camera optical lens 40 is 1.060 mm, the image height IH of the 1.0 field of view is 3.269 mm, and the field of view angle FOV of the 1.0 field of view is 109.77°. The camera optical lens 40 meets the characteristics of large aperture, wide angle, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0207] Fifth embodiment

[0208] 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.

[0209] Tables 9 and 10 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0210]

Table 9

[0211]

[0212]

Table 10

[0213]

[0214]

[0215] 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.

[0216] Fig.18 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nanometers after passing through the camera optical lens 50 of the fifth embodiment. Fig.18 The 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the camera optical lens 50 of the fifth embodiment is shown; Fig. 20 A schematic diagram of axial aberrations of wavelengths of 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the imaging optical lens 50 of the fifth embodiment is shown.

[0217] As shown in Table 15, the fifth embodiment satisfies each conditional expression.

[0218] In this embodiment, the entrance pupil diameter of the camera optical lens 50 is 0.796 mm, the image height IH of the 1.0 field of view is 3.268 mm, and the field of view angle FOV of the 1.0 field of view is 124.37°. The camera optical lens 50 meets the characteristics of large aperture, wide angle, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0219] Sixth Embodiment

[0220] 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.

[0221] Table 11 and Table 12 show design data of the imaging optical lens 60 according to the sixth embodiment of the present invention.

[0222]

Table 11

[0223]

[0224]

Table 12

[0225]

[0226]

[0227] 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.

[0228] Fig. 22 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nanometers after passing through the camera optical lens 60 of the sixth embodiment. Fig. 22 The 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers after passing through the imaging optical lens 60 of the sixth embodiment is shown.

[0229] As shown in Table 15, the sixth embodiment satisfies each conditional expression.

[0230] In this embodiment, the entrance pupil diameter of the camera optical lens 60 is 0.918 mm, the image height IH of the 1.0 field of view is 3.131 mm, and the field of view angle FOV of the 1.0 field of view is 117.33°. The camera optical lens 60 meets the characteristics of large aperture, wide angle, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0231] Comparative Implementation Methods

[0232] 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.

[0233] Tables 13 and 14 show the design data of the imaging optical lens 70 of the comparative embodiment.

[0234]

Table 13

[0235]

[0236]

Table 14

[0237]

[0238]

[0239] 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.

[0240] Fig.26 FIG. 4 is a schematic diagram showing the field curvature and distortion of light having a wavelength of 555 nanometers after passing through the camera optical lens 70 of the comparative embodiment. Fig.26 The 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 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 470 nanometers, 510 nanometers, 555 nanometers, 610 nanometers, and 650 nanometers.

[0241] As shown in Table 15, the values ​​corresponding to the parameters in the comparative embodiment and the parameters specified in the conditional formula are also listed. Obviously, the imaging optical lens 70 of the comparative embodiment does not satisfy the above conditional formula -0.40≤(R1+R2) / (R1-R2)≤0.00.

[0242] In this embodiment, the entrance pupil diameter of the camera optical lens 70 is 0.852 mm, the 1.0 image height is 3.072 mm, and the 1.0 field of view is 121.06°. The camera optical lens 70 has the characteristics of large aperture, wide angle, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are fully corrected and it has excellent optical performance.

[0243]

Table 15

[0244]

[0245]

[0246] 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 a total of six lenses, which are arranged in order from the object side to the image side: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power; the object side surface of the first lens is concave 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 convex at the paraxial position, and the image side surface of the third lens is convex at the paraxial position; the object side surface of the fourth lens is concave at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; the object side surface of the fifth lens is concave at the paraxial position , the image side surface of the fifth 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 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, the axial spacing between the image side surface of the first lens and the object side surface of the second lens is d2, the axial thickness of the second lens is d3, 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 focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -0.40≤(R1+R2) / (R1-R2)≤0.00; 0.20≤(d1+d2+d3) / TTL≤0.30; -1.80≤(f5-f6) / f1≤-1.20; 1.00≤(R9+R10) / (R9-R10)≤1.

20.

2. The imaging optical lens according to claim 1, characterized in that: The focal length of the second lens is f2, the focal length of the third lens is f3, and the following relationship is satisfied: 1.20≤f2 / f3≤3.

00.

3. The imaging optical lens according to claim 1, characterized in that: The image height of 1.0 field of view of the camera optical lens is IH, the focal length of the camera optical lens is f, and the following relationship is satisfied: 0.80≤IH*f / TTL≤1.

50.

4. The imaging optical lens according to claim 1, wherein: The focal length of the camera optical lens is f, and also satisfies the following relationship: -1.67≤f1 / f≤-1.43; 0.05≤d1 / TTL≤0.

09.

5. The imaging optical lens according to claim 1, wherein: The focal length of the camera optical lens is f, the focal length of the second lens is f2, and the following relationship is satisfied: -4.02≤(R3+R4) / (R3-R4)≤-2.03; 2.20≤f2 / f≤4.28; 0.10≤d3 / TTL≤0.

14.

6. The imaging optical lens according to claim 1, characterized in that: The focal length of the camera optical lens is f, the central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side 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: 0.07≤(R5+R6) / (R5-R6)≤0.30; 1.20≤f3 / f≤1.83; 0.08≤d5 / TTL≤0.

11.

7. The imaging optical lens according to claim 1, characterized in that: The focal length of the camera optical lens is f, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side 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: 0.74≤(R7+R8) / (R7-R8)≤0.98; -3.56≤f4 / f≤-2.31; 0.04≤d7 / TTL≤0.

06.

8. The imaging optical lens according to claim 1, wherein: The focal length of the camera optical lens is f, the axial thickness of the fifth lens is d9, and the following relationship is satisfied: 0.70≤f5 / f≤0.97; 0.19≤d9 / TTL≤0.

23.

9. The imaging optical lens according to claim 1, characterized in that: The focal length of the camera optical lens is f, 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 axial thickness of the sixth lens is d11, and the following relationship is satisfied: 2.76≤(R11+R12) / (R11-R12)≤3.12; -1.86≤f6 / f≤-1.09; 0.07≤d11 / TTL≤0.

09.

10. The imaging optical lens according to claim 1, characterized in that: The image height of 1.0 field of view of the camera optical lens is IH, and satisfies the following relationship: 1.60≤TTL / IH≤1.94.

Images