Camera optical lens

Abstract

A camera optical lens (10). The camera optical lens (10) sequentially comprises seven lenses from an object side to an image side: a first lens (L1) having positive refractive power, a second lens (L2) having negative refractive power, a third lens (L3) having positive refractive power, a fourth lens (L4) having negative refractive power, a fifth lens (L5) having refractive power, a sixth lens (L6) having positive refractive power, and a seventh lens (L7) having negative refractive power; and the following relational expressions are satisfied: 0.95≤f1 / f≤1.25; 60.00≤v1≤82.00; -4.00≤R13 / R14≤-1.00; and 1.50≤d4 / d6≤5.00. The camera optical lens (10) has good optical properties, and also satisfies the design requirements of large aperture, ultra-thinness, and ultra-wide angle.

Description

Camera optical lenses 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 shrinking pixel size of photosensitive devices and the trend towards lightweight, portable electronic products with high functionality, miniaturized camera optical lenses with excellent imaging quality have become the mainstream in the market. To achieve optimal imaging quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasing user demands, as the pixel size of photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, seven-element lens structures are gradually emerging in lens designs. There is an urgent need for wide-angle lenses with excellent optical characteristics, a compact size, and fully corrected aberrations.

[0003] Summary of the Invention

[0004] In view of the above problems, the object of the present invention is to provide a camera optical lens that has good optical performance while meeting the design requirements of large aperture, ultra-thinness and ultra-wide angle.

[0005] To achieve the above-mentioned object, the technical solution of the present invention provides a camera optical lens, which comprises a total of seven lenses, wherein 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 with refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; wherein the focal length of the first lens is f1, the focal length of the camera optical lens is f, The Abbe number of the first lens is v1, the central curvature radius of the object side of the seventh lens is R13, the central curvature radius of the image side of the seventh lens is R14, the on-axis distance between the second lens and the third lens is d4, and the on-axis distance between the third lens and the fourth lens is d6, and the following relationship is satisfied: 0.95≤f1 / f≤1.25; 60.00≤v1≤82.00; -4.00≤R13 / R14≤-1.00; 1.50≤d4 / d6≤5.00.

[0006] Preferably, the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the following relationship is satisfied: 2.00≤(R7+R8) / (R7-R8)≤20.00.

[0007] Preferably, the object side surface of the first lens is convex at the paraxial point, and the image side surface of the first lens is concave at the paraxial point; 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 axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -4.14≤(R1+R2) / (R1-R2)≤-1.06; 0.06≤d1 / TTL≤0.21.

[0008] Preferably, the object side surface of the second lens is convex at the paraxial point, and the image side surface of the second lens is concave at the paraxial point; the focal length of the second lens is f2, the central curvature radius of the object side surface of the second lens is R3, the central curvature radius of the image side surface of the second lens is R4, the 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: -15.86≤f2 / f≤-3.01; 2.67≤(R3+R4) / (R3-R4)≤12.77; 0.02≤d3 / TTL≤0.05.

[0009] Preferably, the image side surface of the third lens is convex at the paraxial position; the focal length of the third lens is f3, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the 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: 3.47≤f3 / f≤24.78; -0.25≤(R5+R6) / (R5-R6)≤1.61; 0.03≤d5 / TTL≤0.12.

[0010] Preferably, the object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; the focal length of the fourth lens is f4, 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: -62.59≤f4 / f≤-2.51; 0.02≤d7 / TTL≤0.06.

[0011] Preferably, the object side surface of the fifth lens is convex at the paraxial position, and the image side surface of the fifth lens is concave at the paraxial position; the focal length of the fifth lens is f5, the central curvature radius of the object side surface of the fifth lens is R9, the central curvature radius of the image side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -30.01≤f5 / f≤27.49; -7.90≤(R9+R10) / (R9-R10)≤6.02; 0.04≤d9 / TTL≤0.13.

[0012] Preferably, the object side surface of the sixth lens is convex at the paraxial point, and the image side surface of the sixth lens is concave at the paraxial point; the focal length of the sixth lens is f6, 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, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.46≤f6 / f≤1.71; -3.58≤(R11+R12) / (R11-R12)≤-1.11; 0.04≤d11 / TTL≤0.13.

[0013] Preferably, the object side surface of the seventh lens is concave at the paraxial position, and the image side surface of the seventh lens is concave at the paraxial position; the focal length of the seventh lens is f7, 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: -1.41≤f7 / f≤-0.43; 0.02≤d13 / TTL≤0.09.

[0014] Preferably, the first lens is made of glass.

[0015] The beneficial effects of the present invention are that 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

[0016] 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. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

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

[0018] FIG2 is a schematic diagram of axial aberration of the camera optical lens shown in FIG1 ;

[0019] FIG3 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG1 ;

[0020] FIG4 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG1 ;

[0021] 5 is a schematic structural diagram of a second embodiment of the present invention, an optical lens;

[0022] FIG6 is a schematic diagram of axial aberration of the camera optical lens shown in FIG5 ;

[0023] FIG7 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG5 ;

[0024] FIG8 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG5 ;

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

[0026] FIG10 is a schematic diagram of axial aberration of the camera optical lens shown in FIG9 ;

[0027] FIG11 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG9 ;

[0028] FIG12 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG9 ;

[0029] 13 is a schematic structural diagram of a fourth embodiment of the present invention, an imaging optical lens;

[0030] FIG14 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG13 ;

[0031] FIG15 is a schematic diagram of magnification chromatic aberration of the camera optical lens shown in FIG13 ;

[0032] FIG16 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG13 ;

[0033] FIG17 is a schematic structural diagram of a fifth embodiment of the present invention;

[0034] FIG18 is a schematic diagram of axial aberration of the camera optical lens shown in FIG17 ;

[0035] FIG19 is a schematic diagram of magnification chromatic aberration of the imaging optical lens shown in FIG17 ;

[0036] FIG20 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG17 ;

[0037] FIG21 is a schematic structural diagram of a camera optical lens according to a comparative embodiment;

[0038] FIG22 is a schematic diagram of axial aberration of the camera optical lens shown in FIG21 ;

[0039] FIG23 is a schematic diagram of magnification chromatic aberration of the imaging optical lens shown in FIG21 ;

[0040] FIG24 is a schematic diagram of field curvature and distortion of the camera optical lens shown in FIG21 . DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present invention. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the present invention can still be implemented.

[0042] Referring to the accompanying drawings, the technical solution of the present invention provides an imaging optical lens 10, 20, 30, 40, 50. Figures 1, 5, 9, 13, and 17 illustrate the imaging optical lenses 10, 20, 30, 40, 50 of the present invention. Each imaging optical lens 10, 20, 30, 40, 50 comprises a total of seven lenses. Specifically, the imaging optical lens comprises, 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 disposed between the seventh lens L7 and the image plane Si.

[0043] 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.

[0044] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 , and the seventh lens L7 are all aspherical surfaces.

[0045] The focal length of the camera optical lens is defined as f, and the focal length of the first lens L1 is defined as f1, satisfying the following relationship: 0.95≤f1 / f≤1.25, which specifies the ratio of the focal length of the first lens L1 to the focal length of the camera optical lens. Within this range, the camera optical lens can have better imaging quality and lower sensitivity by reasonably allocating the optical focal length of the camera optical lens.

[0046] The Abbe number of the first lens element L1 is defined as v1, which satisfies the following relationship: 60.00≤v1≤82.00. This specifies the Abbe number of the first lens element L1. Within this range, material properties can be effectively distributed and chromatic aberration can be effectively corrected to make the chromatic aberration |LC| ≤4.0μm.

[0047] The central radius of curvature of the object-side surface of the seventh lens element L7 is defined as R13, and the central radius of curvature of the image-side surface of the seventh lens element L7 is defined as R14, satisfying the following relationship: -4.00 ≤ R13 / R14 ≤ -1.00. This relationship specifies the shape of the seventh lens element L7. Within the range of this relationship, astigmatism and distortion of the camera optical lens are corrected, achieving distortion |Distortion| ≤ 2.5%, thereby reducing the possibility of vignetting.

[0048] The on-axis distance between the second lens L2 and the third lens L3 is defined as d4, and the on-axis distance between the third lens L3 and the fourth lens L4 is defined as d6, satisfying the following relationship: 1.50≤d4 / d6≤5.00. This relationship specifies the ratio of the air spacing between the second and third lenses to the air spacing between the third and fourth lenses. By properly allocating the air spacing between the lenses, the assembly difficulty during actual production is reduced, and the yield rate is improved.

[0049] When the above conditions are met, the camera optical lenses 10, 20, 30, 40, and 50 have good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thinness; according to the characteristics of the camera optical lenses 10, 20, 30, 40, and 50, the camera optical lenses 10, 20, 30, 40, and 50 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0050] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0051] The central curvature radius of the object-side surface of the fourth lens L4 is defined as R7, and the central curvature radius of the image-side surface of the fourth lens L4 is defined as R8, satisfying the following relationship: 2.00≤(R7+R8) / (R7-R8)≤20.00. The above relationship specifies the shape of the fourth lens L4. Within the range of the relationship, the degree of refraction of light passing through the lens is alleviated, thereby effectively reducing aberrations.

[0052] The object-side surface of the first lens L1 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. 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.

[0053] The central radius of curvature of the object-side surface of first lens L1 is defined as R1, and the central radius of curvature of the image-side surface of first lens L1 is defined as R2, satisfying the following relationship: -4.14 ≤ (R1 + R2) / (R1 - R2) ≤ -1.06. By properly controlling the shape of first lens L1, first lens L1 can effectively correct systematic spherical aberration. Preferably, -2.59 ≤ (R1 + R2) / (R1 - R2) ≤ -1.33.

[0054] The axial thickness of the first lens L1 is d1, and the total optical length of the camera optical lens 10 is TTL, which satisfies the following relationship: 0.06≤d1 / TTL≤0.21. Within the range of the relationship, it is conducive to achieving ultra-thinness. Preferably, 0.10≤d1 / TTL≤0.16 is satisfied.

[0055] The object-side surface of the second lens L2 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The second lens L2 has negative refractive power. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0056] The focal length of the second lens element L2 is defined as f2, which satisfies the following relationship: -15.86 ≤ f2 / f ≤ -3.01. By controlling the negative power of the second lens element L2 within a reasonable range, it is beneficial to correct aberrations of the optical system. Preferably, -9.91 ≤ f2 / f ≤ -3.77 is satisfied.

[0057] The central radius of curvature of the object-side surface of second lens L2 is defined as R3, and the central radius of curvature of the image-side surface of second lens L2 is defined as R4, satisfying the following relationship: 2.67 ≤ (R3 + R4) / (R3 - R4) ≤ 12.77. The shape of second lens L2 is appropriately controlled so that it can effectively correct system spherical aberration. Preferably, 4.27 ≤ (R3 + R4) / (R3 - R4) ≤ 10.22 is satisfied.

[0058] The axial thickness of the second lens L2 is d3, which satisfies the following relationship: 0.02≤d3 / TTL≤0.05. Within the range of this relationship, it is advantageous to achieve ultra-thinness. Preferably, 0.03≤d3 / TTL≤0.04 is satisfied.

[0059] The object-side surface of the third lens L3 is convex or concave at the paraxial direction, and the image-side surface is convex at the paraxial direction. The third lens L3 has positive refractive power. The image-side surface of the third lens L3 can also be configured with other concave or convex distributions.

[0060] The focal length of the third lens L3 is defined as f3, which satisfies the following relationship: 3.47≤f3 / f≤24.78. By properly distributing the optical power, the system has better imaging quality and lower sensitivity. Preferably, 5.55≤f3 / f≤19.82 is satisfied.

[0061] The central radius of curvature of the object-side surface of the third lens L3 is R5, and the central radius of curvature of the image-side surface of the third lens L3 is R6, satisfying the following relationship: -0.25 ≤ (R5 + R6) / (R5 - R6) ≤ 1.61. This defines the shape of the third lens L3. Within this range, as lenses move towards ultra-thin and wide-angle lenses, it is beneficial for correcting axial chromatic aberration. Preferably, -0.16 ≤ (R5 + R6) / (R5 - R6) ≤ 1.29.

[0062] 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: 0.03≤d5 / TTL≤0.12. Within the range of the relationship, it is conducive to achieving ultra-thinness. Preferably, 0.05≤d5 / TTL≤0.09 is satisfied.

[0063] The object-side surface of the fourth lens element L4 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The fourth lens element L4 has negative refractive power. The object-side and image-side surfaces of the fourth lens element L4 can also be configured with other concave and convex distributions.

[0064] The focal length of the fourth lens L4 is defined as f4, which satisfies the following relationship: -62.59≤f4 / f≤-2.51. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -39.12≤f4 / f≤-3.14 is satisfied.

[0065] The axial thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.02≤d7 / TTL≤0.06. Within the range of the relationship, it is conducive to achieving ultra-thinness. Preferably, it satisfies 0.03≤d7 / TTL≤0.05.

[0066] The object-side surface of the fifth lens element L5 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The fifth lens element L5 has positive or negative refractive power. The object-side and image-side surfaces of the fifth lens element L5 can also be configured with other concave or convex distributions.

[0067] The focal length of the fifth lens L5 is f5, which satisfies the following relationship: -30.01≤f5 / f≤27.49. The limitation of the fifth lens L5 can effectively make the angle of the light of the camera optical lens 10 smooth and reduce the tolerance sensitivity. Preferably, -18.76≤f5 / f≤21.99 is satisfied.

[0068] The central radius of curvature of the object-side surface of the fifth lens L5 is R9, and the central radius of curvature of the image-side surface of the fifth lens L5 is R10, satisfying the following relationship: -7.90 ≤ (R9 + R10) / (R9 - R10) ≤ 6.02. This specifies the shape of the fifth lens L5 and is beneficial for correcting astigmatism and distortion of the imaging optical lens 10 within a certain range of conditions. Preferably, -4.94 ≤ (R9 + R10) / (R9 - R10) ≤ 4.81.

[0069] The axial thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.04≤d9 / TTL≤0.13. Within the range of the relationship, it is advantageous to achieve ultra-thinness. Preferably, 0.06≤d9 / TTL≤0.10 is satisfied.

[0070] The object-side surface of the sixth lens element L6 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The sixth lens element L6 has positive refractive power. The object-side and image-side surfaces of the sixth lens element L6 can also be configured with other concave and convex distributions.

[0071] The focal length of the sixth lens L6 is defined as f6, which satisfies the following relationship: 0.46≤f6 / f≤1.71. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, 0.74≤f6 / f≤1.37 is satisfied.

[0072] The central radius of curvature of the object-side surface of sixth lens element L6 is R11, and the central radius of curvature of the image-side surface of sixth lens element L6 is R12. The following relationship is satisfied: -3.58 ≤ (R11 + R12) / (R11 - R12) ≤ -1.11, which defines the shape of sixth lens element L6. Within this range, as ultra-thin and wide-angle lenses become increasingly popular, it is beneficial for correcting aberrations at off-axis angles. Preferably, -2.24 ≤ (R11 + R12) / (R11 - R12) ≤ -1.38.

[0073] The axial thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.04≤d11 / TTL≤0.13. Within the range of this relationship, ultra-thinness can be achieved. Preferably, 0.06≤d11 / TTL≤0.10 is satisfied.

[0074] The object-side surface and image-side surface of the seventh lens element L7 are concave at the paraxial direction, and the image-side surface is concave at the paraxial direction. The seventh lens element L7 has negative refractive power. The object-side and image-side surfaces of the seventh lens element L7 can also be configured with other concave or convex distributions.

[0075] The focal length of the camera optical lens is defined as f, and the focal length of the seventh lens L7 is defined as f7. The following relationship is satisfied: -1.41 ≤ f7 / f ≤ -0.43. By properly distributing the focal length, the system achieves better imaging quality and lower sensitivity. Preferably, -0.88 ≤ f7 / f ≤ -0.53 is satisfied.

[0076] The axial thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.02≤d13 / TTL≤0.09. Within the conditional range, it is conducive to achieving ultra-thinness. Preferably, 0.03≤d13 / TTL≤0.07 is satisfied.

[0077] The image height of the camera optical lens is IH, and satisfies the following relationship: TTL / IH≤1.29, which is conducive to achieving ultra-thinness.

[0078] The field of view (FOV) of the camera optical lens is greater than or equal to 82.98°, thereby achieving a wide angle.

[0079] The aperture value FNO of the camera optical lens is less than or equal to 1.618, thereby achieving a large aperture and making the camera optical lens have good imaging performance.

[0080] The following examples illustrate the imaging optical lens of the present invention. The symbols used in each example are as follows: focal length, on-axis distance, central radius of curvature, on-axis thickness, inflection point position, and stationary point position are in millimeters.

[0081] TTL: total optical length (the on-axis distance from the object side of the first lens L1 to the image surface Si), in mm;

[0082] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0083] Next, the technical solution of the present invention is specifically described with five embodiments. At the same time, a comparative embodiment 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.

[0084] (First embodiment)

[0085] Tables 1 and 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0086] The fifth lens L5 has positive refractive power, and the object-side surface of the third lens L3 is convex at the paraxial position.

[0087]

Table 1

[0088] The meanings of the symbols are as follows.

[0089] S1: aperture;

[0090] R: radius of curvature at the center of the optical surface;

[0091] R1: the central curvature radius of the object side of the first lens L1;

[0092] R2: the central curvature radius of the image-side surface of the first lens L1;

[0093] R3: the central curvature radius of the object-side surface of the second lens L2;

[0094] R4: the central curvature radius of the image-side surface of the second lens L2;

[0095] R5: central radius of curvature of the object side surface of the third lens L3;

[0096] R6: central curvature radius of the image-side surface of the third lens L3;

[0097] R7: central curvature radius of the object side surface of the fourth lens L4;

[0098] R8: central curvature radius of the image-side surface of the fourth lens L4;

[0099] R9: the central radius of curvature of the object side surface of the fifth lens L5;

[0100] R10: central curvature radius of the image-side surface of the fifth lens L5;

[0101] R11: central curvature radius of the object-side surface of the sixth lens L6;

[0102] R12: central curvature radius of the image-side surface of the sixth lens L6;

[0103] R13: central radius of curvature of the object side surface of the seventh lens L7;

[0104] R14: central curvature radius of the image-side surface of the seventh lens L7;

[0105] R15: The central curvature radius of the object side of the optical filter GF;

[0106] R16: The central curvature radius of the image side of the optical filter GF;

[0107] d: the on-axis thickness of the lens and the on-axis distance between lenses;

[0108] d0: the on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0109] d1: axial thickness of the first lens L1;

[0110] d2: the on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

[0111] d3: axial thickness of the second lens L2;

[0112] d4: the on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0113] d5: axial thickness of the third lens L3;

[0114] d6: the on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

[0115] d7: axial thickness of the fourth lens L4;

[0116] d8: the on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0117] d9: axial thickness of the fifth lens L5;

[0118] d10: the on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0119] d11: axial thickness of sixth lens L6;

[0120] d12: the on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0121] d13: axial thickness of seventh lens L7;

[0122] d14: the on-axis distance between the image-side surface of the seventh lens L7 and the object-side surface of the optical filter GF;

[0123] d15: axial thickness of the optical filter GF;

[0124] d16: the axial distance from the image side of the optical filter GF to the image plane Si;

[0125] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0126] nd1: the refractive index of the first lens L1 at the d-line;

[0127] nd2: the refractive index of the second lens L2 at the d-line;

[0128] nd3: the refractive index of the third lens L3 at the d-line;

[0129] nd4: the refractive index of the fourth lens L4 at the d-line;

[0130] nd5: the refractive index of the fifth lens L5 at the d-line;

[0131] nd6: the refractive index of the sixth lens L6 at the d-line;

[0132] nd7: the refractive index of the seventh lens L7 at the d-line;

[0133] ndg: refractive index of the d-line of the optical filter GF;

[0134] vd: Abbe number;

[0135] v1: Abbe number of the first lens L1;

[0136] v2: Abbe number of the second lens L2;

[0137] v3: Abbe number of the third lens L3;

[0138] v4: Abbe number of the fourth lens L4;

[0139] v5: Abbe number of the fifth lens L5;

[0140] v6: Abbe number of sixth lens L6;

[0141] v7: Abbe number of seventh lens L7;

[0142] vg: Abbe number of the optical filter GF.

[0143] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0144]

Table 2

[0145] 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). 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A 16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0146] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and the tangent plane tangent to the vertex on the aspheric axis).

[0147] Figures 2 and 3 are schematic diagrams showing axial aberration and lateral chromatic aberration, respectively, for 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. Figure 4 is a schematic diagram showing field curvature and distortion for light with a wavelength of 546 nm after passing through the imaging optical lens 10 of the first embodiment. The field curvature S in Figure 4 is the sagittal curvature, and T is the tangential curvature.

[0148] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 3.306 mm, the full field of view image height IH is 5.125 mm, and the diagonal field of view FOV is 85.50°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0149] (Second embodiment)

[0150] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0151] FIG5 shows a second embodiment of an imaging optical lens 20 according to the present invention. The fifth lens element L5 has negative refractive power, and the object-side surface of the third lens element L3 is concave at the paraxial position.

[0152] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0153]

Table 3

[0154] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0155]

Table 4

[0156] Figures 6 and 7 respectively illustrate the axial aberration and lateral 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. Figure 8 illustrates the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20 of the second embodiment. The field curvature S in Figure 8 represents the sagittal curvature, and T represents the tangential curvature.

[0157] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 3.493 mm, the full field of view image height IH is 5.125 mm, and the field of view angle FOV in the diagonal direction is 82.98°. 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.

[0158] (Third embodiment)

[0159] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0160] FIG. 9 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0161] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0162]

Table 5

[0163] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0164]

Table 6

[0165] Figures 10 and 11 respectively illustrate the axial aberration and lateral 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. Figure 12 illustrates the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment. The field curvature S in Figure 12 represents the sagittal curvature, and T represents the tangential curvature.

[0166] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.322 mm, the full field of view image height IH is 5.125 mm, and the diagonal field of view angle FOV is 85.57°. 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.

[0167] (Fourth embodiment)

[0168] The meanings of the symbols in the fourth embodiment are the same as those in the first embodiment.

[0169] FIG. 13 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0170] Tables 7 and 8 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0171]

Table 7

[0172] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0173]

Table 8

[0174] Figures 14 and 15 are schematic diagrams showing axial aberration and lateral chromatic aberration, respectively, for 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. Figure 16 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 40 of the fourth embodiment. The field curvature S in Figure 16 is the sagittal curvature, and T is the tangential curvature.

[0175] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 3.213 mm, the full field of view image height IH is 5.125 mm, and the diagonal field of view angle FOV is 87.41°. 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.

[0176] (Fifth embodiment)

[0177] The meanings of the symbols in the fifth embodiment are the same as those in the first embodiment.

[0178] FIG. 17 shows an imaging optical lens 50 according to a fifth embodiment of the present invention.

[0179] Tables 9 and 10 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0180]

Table 9

[0181] Table 10 shows aspherical surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0182]

Table 10

[0183] Figures 18 and 19 respectively illustrate the axial aberration and lateral 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 50 of the fifth embodiment. Figure 20 illustrates the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 50 of the fifth embodiment. The field curvature S in Figure 20 represents the sagittal curvature, and T represents the tangential curvature.

[0184] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 3.305 mm, the full field of view image height IH is 5.125 mm, and the field of view angle FOV in the diagonal direction is 85.58°. 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.

[0185] Table 13 that follows shows the values ​​corresponding to the various numerical values ​​in each of the first, second, third, fourth, and fifth embodiments and the parameters specified in the conditional expressions.

[0186] (Comparative embodiment)

[0187] The meanings of the symbols in the comparative embodiment are the same as those in the first embodiment.

[0188] FIG. 21 shows an imaging optical lens 60 according to a comparative embodiment.

[0189] Tables 11 and 12 show design data of the imaging optical lens 60 according to the comparative embodiment.

[0190]

Table 11

[0191] Table 12 shows aspherical surface data of each lens in the imaging optical lens 60 of the comparative embodiment.

[0192]

Table 12

[0193] Figures 22 and 23 respectively illustrate the axial aberration and lateral 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 60 of the comparative embodiment. Figure 24 illustrates the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 60 of the comparative embodiment. The field curvature S in Figure 24 represents the sagittal field curvature, and T represents the tangential field curvature.

[0194] Table 13 below lists the values ​​corresponding to the various conditional expressions in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 60 of the comparative embodiment does not satisfy the above conditional expression 0.95≤f1 / f≤1.25, which affects the imaging quality.

[0195] In a comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 3.056 mm, the full field of view image height IH is 5.125 mm, and the field of view angle FOV in the diagonal direction is 85.98°. The camera optical lens 60 does not meet the design requirements of good optical performance, large aperture, wide angle, and ultra-thinness.

[0196]

Table 13

[0197] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made 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 a total of seven lenses, and the seven lenses are, in order from the object side to the image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; The focal length of the first lens is f1, the focal length of the camera optical lens is f, the Abbe number of the first lens is v1, the central curvature radius of the object side surface of the seventh lens is R13, the central curvature radius of the image side surface of the seventh lens is R14, the on-axis distance between the second lens and the third lens is d4, and the on-axis distance between the third lens and the fourth lens is d6, and the following relationship is satisfied: 0.95≤f1 / f≤1.25; 60.00≤v1≤82.00； -4.00≤R13 / R14≤-1.00; 1.50≤d4 / d6≤5.

00.

2. The imaging optical lens according to claim 1, wherein: The central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the following relationship is satisfied: 2.00≤(R7+R8) / (R7-R8)≤20.

00.

3. The imaging optical lens according to claim 1, wherein: The object side surface of the first lens is convex at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; The 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 axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -4.14≤(R1+R2) / (R1-R2)≤-1.06; 0.06≤d1 / TTL≤0.

21.

4. The imaging optical lens according to claim 1, wherein: 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 focal length of the second lens is f2, 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 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: -15.86≤f2 / f≤-3.01; 2.67≤(R3+R4) / (R3-R4)≤12.77; 0.02≤d3 / TTL≤0.

05.

5. The imaging optical lens according to claim 1, wherein: The image side surface of the third lens is convex at the paraxial position; The focal length of the third lens is f3, 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 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: 3.47≤f3 / f≤24.78; -0.25≤(R5+R6) / (R5-R6)≤1.61; 0.03≤d5 / TTL≤0.

12.

6. The imaging optical lens according to claim 1, wherein: The object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; The focal length of the fourth lens is f4, 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: -62.59≤f4 / f≤-2.51; 0.02≤d7 / TTL≤0.

06.

7. The imaging optical lens according to claim 1, wherein: The object-side surface of the fifth lens is convex at the paraxial position, and the image-side surface of the fifth lens is concave at the paraxial position; 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: -30.01≤f5 / f≤27.49; -7.90≤(R9+R10) / (R9-R10)≤6.02; 0.04≤d9 / TTL≤0.

13.

8. The imaging optical lens according to claim 1, wherein: 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 focal length of the sixth lens is f6, 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, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.46≤f6 / f≤1.71; -3.58≤(R11+R12) / (R11-R12)≤-1.11; 0.04≤d11 / TTL≤0.

13.

9. The imaging optical lens according to claim 1, wherein: The object-side surface of the seventh lens is concave at the paraxial position, and the image-side surface of the seventh lens is concave at the paraxial position; The focal length of the seventh lens is f7, 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: -1.41≤f7 / f≤-0.43; 0.02≤d13 / TTL≤0.

09.

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

Images