Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which comprises seven lenses which are sequentially a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power and a fifth lens from an object side to an image side, a sixth lens element with positive refractive power; and a seventh lens element with negative refractive power. The following relational expressions are satisfied: 1.10 < = (R3 + R4) / f < = 1.70; f6 / R12-f7 / R14 is greater than or equal to 1.50 and less than or equal to 3.00; -3.30 < = (R5 + R6) / (R5-R6) < =-2.00; and 3.00 < = d1 / d2 < = 12.00. The camera shooting optical lens has the good optical performance of large aperture, wide angle, ultra-thinness and the like.

Description

Technical Field

[0001] The present invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for portable terminal devices such as smart phones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Art

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera optical lenses has been increasing. Due to the reduction in the pixel size of photosensitive devices and the trend of today's electronic products to have good functions and a thin and portable appearance, miniaturized camera optical lenses with good imaging quality have become the mainstream in the current market. In order to obtain better imaging quality, a multi-piece lens structure is often used. In addition, with the development of technology and the increase in the diversified needs of users, as the pixel area of ​​photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, a seven-piece lens structure has gradually appeared in lens design. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, small size, and fully corrected aberrations. Summary of the invention

[0003] In view of the above problems, the main purpose of the present invention is to provide a camera optical lens, which has good optical performance and meets the design requirements of large aperture, ultra-thinness and wide angle.

[0004] To achieve the above object, the technical solution of the present invention provides a camera optical lens, the camera optical lens comprises seven lenses in total, the seven lenses are, from the object side to the image side, in order: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens, a sixth lens with positive refractive power and a seventh lens with negative refractive power;

[0005] The object side surface of the first lens is convex at the paraxial position, 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, 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, the image side surface of the third lens is concave at the paraxial position, the object side surface of the fourth lens is concave at the paraxial position, the object side surface of the fifth lens is convex at the paraxial position, the image side surface of the fifth lens is concave at the paraxial position, the object side surface of the sixth lens is convex at the paraxial position, the object side surface of the seventh lens is convex at the paraxial position, and the image side surface of the seventh lens is concave at the paraxial position;

[0006] The focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, 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 central curvature radius of the image side of the sixth lens is R12, the central curvature radius of the image side of the seventh lens is R14, the axial thickness of the first lens is d1, and the axial distance from the image side of the first lens to the object side of the second lens is d2, satisfying the following relationship:

[0007] 1.10≤(R3+R4) / f≤1.70;

[0008] 1.50≤f6 / R12-f7 / R14≤3.00;

[0009] -3.30≤(R5+R6) / (R5-R6)≤-2.00;

[0010] 3.00≤d1 / d2≤12.00.

[0011] Preferably, the total optical length of the camera optical lens is TTL, the field of view angle of the camera optical lens in the 1.0 field of view diagonal direction is FOV, the 1.0 field of view image height of the camera optical lens is IH, and the following relationship is satisfied:

[0012] 0.01≤TTL / IH / FOV≤0.02.

[0013] Preferably, the focal length of the first lens is f1, and satisfies the following relationship:

[0014] 0.95≤f1 / f≤1.06.

[0015] Preferably, the central curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0016] -2.29≤(R1+R2) / (R1-R2)≤-1.75;

[0017] 0.123≤d1 / TTL≤0.144.

[0018] Preferably, the focal length of the second lens is f2, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0019] -4.41≤f2 / f≤-3.78;

[0020] 6.97≤(R3+R4) / (R3-R4)≤9.18;

[0021] 0.017≤d3 / TTL≤0.033.

[0022] Preferably, the focal length of the third lens is f3, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0023] 3.00≤f3 / f≤4.10;

[0024] 0.037≤d5 / TTL≤0.059.

[0025] Preferably, the focal length of the fourth lens is f4, 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 axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0026] -6.90≤f4 / f≤-3.53;

[0027] -1.17≤(R7+R8) / (R7-R8)≤0.94;

[0028] 0.023≤d7 / TTL≤0.042.

[0029] Preferably, the focal length of the fifth lens is f5, the central curvature radius of the object side of the fifth lens is R9, the central curvature radius of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0030] -148.40≤f5 / f≤45.43;

[0031] -26.63≤(R9+R10) / (R9-R10)≤47.79;

[0032] 0.027≤d9 / TTL≤0.063.

[0033] Preferably, the focal length of the sixth lens is f6, the central curvature radius of the object side of the sixth lens is R11, the axial thickness of the fifth lens is d11, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0034] 1.71≤f6 / f≤2.92;

[0035] -2.03≤(R11+R12) / (R11-R12)≤-0.42;

[0036] 0.084≤d11 / TTL≤0.175.

[0037] Preferably, the focal length of the seventh lens is f7, the central curvature radius of the object side of the seventh lens is R13, the axial thickness of the seventh lens is d13, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0038] -1.08≤f7 / f≤-0.78;

[0039] 1.11≤(R13+R14) / (R13-R14)≤1.27;

[0040] 0.082≤d13 / TTL≤0.185.

[0041] Preferably, the first lens is made of glass.

[0042] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical properties, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0044] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0045] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0046] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0047] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0048] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0049] Figure 6 yes Figure 5Schematic diagram of axial aberration of the camera optical lens shown;

[0050] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0051] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0052] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0053] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0054] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0055] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0056] Fig.13 is a schematic structural diagram of an imaging optical lens according to a fourth embodiment of the present invention;

[0057] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0058] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0059] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0060] Fig.17 is a schematic structural diagram of a camera optical lens according to a fifth embodiment of the present invention;

[0061] Fig.18 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0062] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0063] Fig. 20 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0065] With reference to the accompanying drawings, the technical solution of the present invention provides an imaging optical lens 10 , 20 , 30 , 40 , 50 . Figure 1 , 5 , 9, 13, and 17 show the camera optical lenses 10, 20, 30, 40, and 50 of the present invention, which include seven lenses in total. Specifically, the camera optical lenses include, from the object side to the image side, an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as an optical filter GF may be provided between the seventh lens L7 and the image plane Si.

[0066] The first lens L1 is made of glass, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic. Each lens may also be made of other materials.

[0067] Define the central curvature radius of the object side of the second lens L2 as R3, the central curvature radius of the image side of the second lens L2 as R4, and the focal length of the camera optical lens as f, satisfying the following relationship: 1.10≤(R3+R4) / f≤1.70. Within the range of the conditional expression, reasonable control of the surface shape of the second lens L2 is conducive to reducing the sensitivity of the system and improving the manufacturing yield by reducing the difficulty of molding. At the same time, it can also reduce the stray light generated by the lens and improve the imaging quality of the lens.

[0068] The focal length of the sixth lens L6 is defined as f6, the focal length of the seventh lens L7 is defined as f7, the central curvature radius of the image side surface of the sixth lens L6 is defined as R12, and the central curvature radius of the image side surface of the seventh lens L7 is defined as R14, satisfying the following relationship: 1.50≤f6 / R12-f7 / R14≤3.00. Within the range of the conditional expression, the degree of deflection of the edge field of view at the sixth lens L6 and the seventh lens L7 is effectively controlled, thereby reducing the sensitivity of the entire camera optical lens.

[0069] The central curvature radius of the object side surface of the third lens L3 is defined as R5, and the central curvature radius of the image side surface of the third lens L3 is defined as R6, which satisfy the following relationship: -3.30≤(R5+R6) / (R5-R6)≤-2.00, which specifies the shape of the third lens L3. Within the range of the conditional expression, the field curvature offset of the central field of view is less than 0.03 mm.

[0070] The axial thickness of the first lens L1 is defined as d1, and the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2 is defined as d2, which satisfy the following relationship: 3.00≤d1 / d2≤12.00, which specifies the ratio of the axial thickness of the first lens L1 to the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2. Within the range of the conditional expression, it is helpful to shorten the total length of the optical system.

[0071] When the above conditions are met, the camera optical lenses 10, 20, 30, 40, 50 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, 30, 40, 50, the camera optical lenses 10, 20, 30, 40, 50 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0072] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0073] The total optical length of the camera optical lens is defined as TTL, the field angle of the camera optical lens in the 1.0 field of view diagonal direction is defined as FOV, the image height of the 1.0 field of view of the camera optical lens is defined as IH, and the following relationship is satisfied: 0.01≤TTL / IH / FOV≤0.02, which specifies the ratio among the total optical length TTL of the camera optical lens, the field angle of the camera optical lens in the 1.0 field of view diagonal direction FOV, and the image height of the 1.0 field of view IH. Within the range of the conditional expression, it helps to control the total length of the system under large image plane imaging.

[0074] The focal length of the first lens L1 is defined as f1, and the following relationship is satisfied: 0.95≤f1 / f≤1.06, which specifies the ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens. Within the conditional range, the optical system has better imaging quality and lower sensitivity by reasonably allocating the optical focal length of the system.

[0075] The object side surface of the first lens L1 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the first lens L1 has positive refractive power. The object side surface and the image side surface of the first lens L1 can also be set to other concave and convex distributions.

[0076] The central curvature radius of the object side surface of the first lens L1 is defined as R1, and the central curvature radius of the image side surface of the first lens L1 is defined as R2, satisfying the following relationship: -2.29≤(R1+R2) / (R1-R2)≤-1.75. The shape of the first lens L1 is reasonably controlled so that the first lens L1 can effectively correct the system spherical aberration.

[0077] The axial thickness of the first lens L1 is d1, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.123≤d1 / TTL≤0.144. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0078] The object side surface of the second lens L2 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the second lens L2 has negative refractive power. The object side surface and the image side surface of the second lens L2 can also be set to other concave and convex distributions.

[0079] The focal length of the second lens L2 is defined as f2, which satisfies the following relationship: -4.41≤f2 / f≤-3.78. By controlling the negative power of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system.

[0080] The central curvature radius of the object side surface of the second lens L2 is R3, and the central curvature radius of the image side surface of the second lens L2 is R4, which satisfies the following relationship: 6.97≤(R3+R4) / (R3-R4)≤9.18, which specifies the shape of the second lens L2. Within the conditional expression, as the camera optical lens develops towards ultra-thin and wide-angle, it is beneficial to correct the axial chromatic aberration problem.

[0081] The axial thickness of the second lens L2 is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.017≤d3 / TTL≤0.033. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0082] The object side surface of the third lens L3 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the third lens L3 has positive refractive power. The object side surface and the image side surface of the third lens L3 can also be set to other concave and convex distributions.

[0083] The focal length of the third lens L3 is defined as f3, which satisfies the following relationship: 3.00≤f3 / f≤4.10. Through the reasonable distribution of optical power, the optical system has better imaging quality and lower sensitivity.

[0084] The axial thickness of the third lens L3 is d5, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.037≤d5 / TTL≤0.059. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0085] The object side surface of the fourth lens L4 is concave at the paraxial position, and the image side surface is concave or convex at the paraxial position, and the fourth lens L4 has negative refractive power. The object side surface and the image side surface of the fourth lens L4 can also be set to other concave or convex distributions.

[0086] The focal length of the fourth lens L4 is defined as f4, which satisfies the following relationship: -6.90≤f4 / f≤-3.53. Through the reasonable distribution of optical power, the optical system has better imaging quality and lower sensitivity.

[0087] The central curvature radius of the object side surface of the fourth lens L4 is R7, and the central curvature radius of the image side surface of the fourth lens L4 is R8, and the following relationship is satisfied: -1.17≤(R7+R8) / (R7-R8)≤0.94, which specifies the shape of the fourth lens L4. When it is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0088] The axial thickness of the fourth lens L4 is d7, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.023≤d7 / TTL≤0.042. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0089] The object side surface of the fifth lens L5 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the fifth lens L5 has positive refractive power or negative refractive power. The object side surface and the image side surface of the fifth lens L5 can also be set to other concave and convex distributions.

[0090] The focal length of the fifth lens L5 is defined as f5, which satisfies the following relationship: -148.40≤f5 / f≤45.43. Through the reasonable distribution of optical power, the optical system has better imaging quality and lower sensitivity.

[0091] The central curvature radius of the object side surface of the fifth lens L5 is R9, and the central curvature radius of the image side surface of the fifth lens L5 is R10, which satisfies the following relationship: -26.63≤(R9+R10) / (R9-R10)≤47.79, which specifies the shape of the fifth lens L5. When it is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0092] The axial thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.027≤d9 / TTL≤0.063. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0093] The object side surface of the sixth lens L6 is convex at the paraxial position, and the image side surface is concave or convex at the paraxial position, and the sixth lens L6 has positive refractive power. The object side surface and the image side surface of the sixth lens L6 can also be set to other concave or convex distributions.

[0094] The focal length of the sixth lens L6 is defined as f6, and satisfies the following relationship: 1.71≤f6 / f≤2.92. Through reasonable distribution of optical power, the optical system has better imaging quality and lower sensitivity.

[0095] The central curvature radius of the object side surface of the sixth lens L6 is R11, the central curvature radius of the image side surface of the sixth lens L6 is R12, and the following relationship is satisfied: -2.03≤(R11+R12) / (R11-R12)≤-0.42, which specifies the shape of the sixth lens L6. When within the condition range, with the development of ultra-thin and wide-angle lenses, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0096] The axial thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.084≤d11 / TTL≤0.175. Being within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0097] The object side surface of the seventh lens L7 is convex at the near axis, and the image side surface is concave at the near axis, and the seventh lens L7 has negative refractive power. The object side surface and the image side surface of the seventh lens L7 can also be set to other concave and convex distributions.

[0098] The focal length of the seventh lens L7 is defined as f7, and satisfies the following relationship: -1.08≤f7 / f≤-0.78. Through reasonable distribution of optical power, the optical system has better imaging quality and lower sensitivity.

[0099] The central curvature radius of the object side surface of the seventh lens L7 is R13, and the central curvature radius of the image side surface of the seventh lens L7 is R14, which satisfies the following relationship: 1.11≤(R13+R14) / (R13-R14)≤1.27, which specifies the shape of the seventh lens L7. When within the condition range, with the development of ultra-thin and wide-angle lenses, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0100] The axial thickness of the seventh lens L7 is d13, and satisfies the following relationship: 0.082≤d13 / TTL≤0.185. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0101] The field of view angle FOV of the camera optical lens in the 1.0 field of view diagonal direction is greater than or equal to 74.98°, which is within the conditional range and is conducive to achieving wide angle.

[0102] The aperture value FNO of the camera optical lens is less than or equal to 1.80, which is within the conditional range, which is conducive to achieving a large aperture and the camera optical lens has good imaging performance.

[0103] The following examples are used to illustrate the imaging optical lens of the present invention. The symbols recorded in each example are as follows: The focal length, axial distance, central curvature radius, and axial thickness are in units of mm.

[0104] TTL: total optical length (the axial distance from the object side of the first lens L1 to the image surface Si), in mm;

[0105] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter;

[0106] 1.0 Field of view image height IH: half of the diagonal length of the effective pixel area of ​​the sensor;

[0107] 1.0 Field of view angle FOV in the diagonal direction of the field of view: the field of view angle corresponding to the effective pixel area of ​​the sensor;

[0108] MIC field of view image height IHm: the field of view height expanded beyond 1.0 field of view image height to prevent assembly deviation;

[0109] FOVm, the field of view angle in the diagonal direction of the MIC field of view: the field of view angle corresponding to the image height of the MIC field of view.

[0110] 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.

[0111] The technical solution of the present invention is specifically described below through five implementation modes.

[0112] (First Embodiment)

[0113] Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0114]

Table 1

[0115]

[0116] The meaning of each symbol is as follows.

[0117] S1: aperture;

[0118] R: radius of curvature at the center of the optical surface;

[0119] R1: the central curvature radius of the object side of the first lens L1;

[0120] R2: the central curvature radius of the image side surface of the first lens L1;

[0121] R3: the central curvature radius of the object side surface of the second lens L2;

[0122] R4: the central curvature radius of the image side surface of the second lens L2;

[0123] R5: the central curvature radius of the object side surface of the third lens L3;

[0124] R6: the central curvature radius of the image side surface of the third lens L3;

[0125] R7: the central curvature radius of the object side surface of the fourth lens L4;

[0126] R8: the central curvature radius of the image side surface of the fourth lens L4;

[0127] R9: the central curvature radius of the object side surface of the fifth lens L5;

[0128] R10: the central curvature radius of the image side surface of the fifth lens L5;

[0129] R11: central curvature radius of the object side surface of the sixth lens L6;

[0130] R12: central curvature radius of the image side surface of the sixth lens L6;

[0131] R13: central curvature radius of the object side surface of the seventh lens L7;

[0132] R14: central curvature radius of the image side surface of the seventh lens L7;

[0133] R15: the central curvature radius of the object side of the optical filter GF;

[0134] R16: the central curvature radius of the image side of the optical filter GF;

[0135] d: the axial thickness of the lens, the axial distance between lenses;

[0136] d0: the axial distance from the aperture S1 to the object side of the first lens L1;

[0137] d1: axial thickness of the first lens L1;

[0138] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0139] d3: axial thickness of the second lens L2;

[0140] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0141] d5: axial thickness of the third lens L3;

[0142] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0143] d7: axial thickness of the fourth lens L4;

[0144] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0145] d9: axial thickness of the fifth lens L5;

[0146] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0147] d11: axial thickness of the sixth lens L6;

[0148] d12: axial distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

[0149] d13: axial thickness of the seventh lens L7;

[0150] d14: axial distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

[0151] d15: axial thickness of the optical filter GF;

[0152] d16: the axial distance from the image side of the optical filter GF to the image plane Si;

[0153] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0154] nd1: refractive index of the first lens L1 at the d-line;

[0155] nd2: refractive index of the d-line of the second lens L2;

[0156] nd3: refractive index of the third lens L3 at the d-line;

[0157] nd4: refractive index of the d-line of the fourth lens L4;

[0158] nd5: the refractive index of the fifth lens L5 at the d-line;

[0159] nd6: the refractive index of the d-line of the sixth lens L6;

[0160] nd7: the refractive index of the d-line of the seventh lens L7;

[0161] ndg: refractive index of the d-line of the optical filter GF;

[0162] vd: Abbe number;

[0163] v1: Abbe number of the first lens L1;

[0164] v2: Abbe number of the second lens L2;

[0165] v3: Abbe number of the third lens L3;

[0166] v4: Abbe number of the fourth lens L4;

[0167] v5: Abbe number of the fifth lens L5;

[0168] v6: Abbe number of sixth lens L6;

[0169] v7: Abbe number of the seventh lens L7;

[0170] vg: Abbe number of the optical filter GF.

[0171] Tables 2 and 3 show aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0172]

Table 2

[0173]

[0174]

[0175]

Table 3

[0176]

[0177] For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the following formula (1). However, the present invention is not limited to the aspheric surface polynomial form represented by the formula (1).

[0178] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0179] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0180] Where, 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 aspheric depth (the vertical distance between the point on the aspheric surface that is r away from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis).

[0181] Figure 2 , Figure 3 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively. Figure 4 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 546 nm after passing through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0182] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 3.523mm, the 1.0 field of view image height IH is 6.000mm, the field of view angle FOV in the diagonal direction of the 1.0 field of view is 85.11°, the MIC field of view image height IHm is 6.300mm, and the field of view angle FOVm in the diagonal direction of the MIC field of view is 87.71°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0183] (Second Embodiment)

[0184] The second embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment. Only the differences are listed below.

[0185] In this embodiment, the fifth lens L5 has negative refracting power.

[0186] Table 4 shows design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0187]

Table 4

[0188]

[0189]

[0190] Tables 5 and 6 show aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0191]

Table 5

[0192]

[0193]

Table 6

[0194]

[0195]

[0196] Figure 6 , Figure 7 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 546 nm after passing through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0197] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 3.447mm, the 1.0 field of view image height IH is 6.000mm, the field of view angle FOV in the diagonal direction of the 1.0 field of view is 80.00°, the MIC field of view image height IHm is 6.300mm, and the field of view angle FOVm in the diagonal direction of the MIC field of view is 83.42°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0198] (Third Embodiment)

[0199] The third embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0200] In this embodiment, the image side surface of the fourth lens L4 is a convex surface at the paraxial position, and the image side surface of the sixth lens L6 is a convex surface at the paraxial position.

[0201] Table 7 shows design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0202]

Table 7

[0203]

[0204] Tables 8 and 9 show aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0205]

Table 8

[0206]

[0207]

[0208]

Table 9

[0209]

[0210] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively. Fig.12 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 546 nm after passing through the camera optical lens 30 of the third embodiment. Fig.12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0211] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 4.194mm, the 1.0 field of view image height IH is 6.000mm, the field of view angle FOV in the diagonal direction of the 1.0 field of view is 74.98°, the MIC field of view image height IHm is 6.300mm, and the field of view angle FOVm in the diagonal direction of the MIC field of view is 77.92°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0212] (Fourth Embodiment)

[0213] The fourth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0214] Table 10 shows design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0215]

Table 10

[0216]

[0217] Tables 11 and 12 show aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0218]

Table 11

[0219]

[0220]

Table 12

[0221]

[0222]

[0223] Fig.14 , Fig.15 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Fig.16 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 546 nm after passing through the camera optical lens 40 of the fourth embodiment. Fig.16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0224] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 3.558 mm, the 1.0 field of view image height IH is 6.000 mm, the field of view angle FOV in the 1.0 field of view diagonal direction is 84.25°, the MIC field of view image height IHm is 6.300 mm, and the field of view angle FOVm in the MIC field of view diagonal direction is 86.82°. The camera optical lens 40 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0225] (Fifth Embodiment)

[0226] The fifth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0227] In this embodiment, the image-side surface of the sixth lens L6 is a convex surface at the paraxial position.

[0228] Table 13 shows design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0229]

Table 13

[0230]

[0231]

[0232] Tables 14 and 15 show aspherical surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0233]

Table 14

[0234]

[0235]

Table 15

[0236]

[0237] Fig.18 , Fig.19Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 50 of the fifth embodiment are shown respectively. Fig. 20 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 546 nm after passing through the camera optical lens 50 of the fifth embodiment. Fig. 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0238] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 3.738 mm, the 1.0 field of view image height IH is 6.000 mm, the field of view angle FOV in the 1.0 field of view diagonal direction is 81.41°, the MIC field of view image height IHm is 6.300 mm, and the field of view angle FOVm in the MIC field of view diagonal direction is 84.27°. The camera optical lens 50 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0239] Table 16 that appears later shows the values ​​of the parameters in each of the first, second, third, fourth, and fifth embodiments and the values ​​corresponding to the parameters specified in some conditional expressions.

[0240]

Table 16

[0241] Parameters and Conditionals Example 1 Example 2 Example 3 Example 4 Example 5 (R3+R4) / f 1.29 1.11 1.70 1.36 1.39 f6 / R12-f7 / R14 2.34 2.98 1.50 2.05 1.81 (R5+R6) / (R5-R6) -2.73 -2.84 -2.56 -2.10 -3.20 d1 / d2 5.85 11.95 3.05 3.89 4.71 f 6.322 6.187 7.505 6.381 6.701 f1 6.448 6.496 7.168 6.680 6.366 f2 -23.947 -24.836 -32.628 -27.473 -27.733 f3 21.548 22.776 26.924 19.190 27.334 f4 -31.548 -42.056 -33.731 -27.480 -23.681 f5 164.805 -910.387 337.696 218.625 89.360 f6 10.811 15.616 21.701 11.082 12.342 f7 -5.085 -6.656 -6.984 -4.987 -5.528 FNO 1.794 1.795 1.789 1.793 1.793 TTL 6.860 7.243 8.833 7.107 7.574 IH 6.000 6.000 6.000 6.000 6.000 FOV 85.11° 80.00° 74.98° 84.25° 81.41°

[0242] Those skilled in the art will appreciate that the above-mentioned embodiments are specific embodiments for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A camera optical lens, characterized in that: The camera optical lens comprises seven lenses in total, and the seven lenses are, from the object side to the image side, in order: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; The object side surface of the first lens is convex at the paraxial position, 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, 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, the image side surface of the third lens is concave at the paraxial position, the object side surface of the fourth lens is concave at the paraxial position, the object side surface of the fifth lens is convex at the paraxial position, the image side surface of the fifth lens is concave at the paraxial position, the object side surface of the sixth lens is convex at the paraxial position, the object side surface of the seventh lens is convex at the paraxial position, and the image side surface of the seventh lens is concave at the paraxial position; The focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, 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 central curvature radius of the image side of the sixth lens is R12, the central curvature radius of the image side of the seventh lens is R14, the axial thickness of the first lens is d1, and the axial distance from the image side of the first lens to the object side of the second lens is d2, satisfying the following relationship: 1.10≤(R3+R4) / f≤1.70; 1.50≤f6 / R12-f7 / R14≤3.00; -3.30≤(R5+R6) / (R5-R6)≤-2.00; 3.00≤d1 / d2≤12.

00.

2. The imaging optical lens according to claim 1, characterized in that: The total optical length of the camera optical lens is TTL, the field of view angle of the camera optical lens in the 1.0 field of view diagonal direction is FOV, the 1.0 field of view image height of the camera optical lens is IH, and the following relationship is satisfied: 0.01≤TTL / IH / FOV≤0.

02.

3. The imaging optical lens according to claim 1, characterized in that: The focal length of the first lens is f1, and satisfies the following relationship: 0.95≤f1 / f≤1.

06.

4. The imaging optical lens according to claim 1, wherein: The central curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -2.29≤(R1+R2) / (R1-R2)≤-1.75; 0.123≤d1 / TTL≤0.

144.

5. The imaging optical lens according to claim 1, wherein: The focal length of the second lens is f2, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -4.41≤f2 / f≤-3.78; 6.97≤(R3+R4) / (R3-R4)≤9.18; 0.017≤d3 / TTL≤0.

033.

6. The imaging optical lens according to claim 1, characterized in that: The focal length of the third lens is f3, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 3.00≤f3 / f≤4.10; 0.037≤d5 / TTL≤0.

059.

7. The imaging optical lens according to claim 1, characterized in that: The focal length of the fourth lens is f4, 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 axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -6.90≤f4 / f≤-3.53; -1.17≤(R7+R8) / (R7-R8)≤0.94; 0.023≤d7 / TTL≤0.

042.

8. The imaging optical lens according to claim 1, characterized in that: The focal length of the fifth lens is f5, the central curvature radius of the object side of the fifth lens is R9, the central curvature radius of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -148.40≤f5 / f≤45.43; -26.63≤(R9+R10) / (R9-R10)≤47.79; 0.027≤d9 / TTL≤0.

063.

9. The imaging optical lens according to claim 1, characterized in that: The focal length of the sixth lens is f6, the central curvature radius of the object side of the sixth lens is R11, the axial thickness of the fifth lens is d11, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 1.71≤f6 / f≤2.92; -2.03≤(R11+R12) / (R11-R12)≤-0.42; 0.084≤d11 / TTL≤0.

175.

10. The imaging optical lens according to claim 1, characterized in that: The focal length of the seventh lens is f7, the central curvature radius of the object side of the seventh lens is R13, the axial thickness of the seventh lens is d13, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -1.08≤f7 / f≤-0.78; 1.11≤(R13+R14) / (R13-R14)≤1.27; 0.082≤d13 / TTL≤0.

185.

11. The imaging optical lens according to claim 1, characterized in that: The first lens is made of glass.

Images