Camera optical lens

Abstract

A camera optical lens (10), comprising seven lenses in total. In sequence from an object side to an image side, the seven lenses are a first lens (L1) having negative refractive power, a second lens (L2) having negative refractive power, a third lens (L3) having refractive power, a fourth lens (L4) having positive refractive power, a fifth lens (L5) having positive refractive power, a sixth lens (L6) having positive refractive power, and a seventh lens (L7) having negative refractive power. The focal length of the fourth lens (L4) is f4, the focal length of the fifth lens (L5) is f5, the central radius of curvature of an object-side surface of the third lens (L3) at a paraxial region is R5, the central radius of curvature of an image-side surface of the third lens (L3) at the paraxial region is R6, the field of view angle of a 1.0 field of view of the camera optical lens (10) is FOV, the f-number is Fno, and the following relational expressions are satisfied: 1.50≤f4 / f5≤3.40; 0.90≤R5 / R6≤1.40; and 170≤FOV / Fno≤200.

Description

Camera optical lens Technical Field

[0001] This invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for handheld terminal devices such as smartphones and digital cameras, as well as camera devices such as monitors, PC lenses, and automotive lenses. Background Technology

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera lenses has been increasing. Due to the shrinking pixel size of image sensors and the current trend in electronic products towards high functionality and lightweight portability, miniaturized camera lenses with good image quality have become mainstream in the market. To achieve better image quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasingly diverse user needs, as the pixel area of ​​image sensors continues to shrink and system requirements for image quality continue to rise, seven-element lens structures are gradually appearing in lens designs. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, large apertures, wide angles, ultra-thin designs, and adequate aberration correction.

[0003] Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a camera optical lens that, while possessing excellent optical performance, meets the design requirements of adequate aberration correction, large aperture, wide-angle capability, and ultra-thin design.

[0005] To achieve the above objectives, the present invention provides a camera optical lens comprising seven lenses, which, from the object side to the image side, are sequentially: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; wherein the fourth lens has a focal length of f4, the fifth lens has a focal length of f5, the central radius of curvature of the object side of the third lens at the paraxial position is R5, the central radius of curvature of the image side of the third lens at the paraxial position is R6, the field of view of the camera optical lens at a 1.0 field of view is FOV, and the aperture value of the camera optical lens is Fno, satisfying the following relationship:

[0006] 1.50≤f4 / f5≤3.40;

[0007] 0.90≤R5 / R6≤1.40;

[0008] 170.00≤FOV / Fno≤200.00.

[0009] Preferably, the Abbe number of the sixth lens is v6 and the Abbe number of the seventh lens is v7, satisfying the following relationship: v6-v7≥35.00.

[0010] Preferably, the axial distance from the image side surface of the seventh lens to the image plane is BF, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.09≤BF / TTL≤0.15.

[0011] Preferably, the focal length of the second lens is f2, and the on-axis thickness of the second lens is d3, satisfying the following relationship: 8.80≤|f2 / d3|≤13.00.

[0012] Preferably, 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 focal length of the imaging optical lens is f, the focal length of the first lens is f1, the central radius of curvature of the object-side surface of the first lens at the paraxial position is R1, the central radius of curvature of the image-side surface of the first lens at the paraxial position is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0013] -13.18≤f1 / f≤-3.84;

[0014] 0.75≤(R1+R2) / (R1-R2)≤2.64;

[0015] 0.02≤d1 / TTL≤0.24.

[0016] Preferably, the object-side surface of the second lens is concave at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position; the focal length of the imaging optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object-side surface of the second lens at the paraxial position is R3, the central radius of curvature of the image-side surface of the second lens at the paraxial position is R4, the on-axis thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0017] -7.57≤f² / f≤-2.15;

[0018] 0.21≤(R3+R4) / (R3-R4)≤0.74;

[0019] 0.01≤d3 / TTL≤0.04.

[0020] Preferably, the object-side surface of the third lens is concave near the axis, and the image-side surface of the third lens is convex near the axis; the focal length of the imaging optical lens is f, the focal length of the third lens is f3, the axial thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0021] -3743.34≤f3 / f≤88.10;

[0022] -39.92≤(R5+R6) / (R5-R6)≤18.19;

[0023] 0.07≤d5 / TTL≤0.25.

[0024] Preferably, the object-side surface of the fourth lens is concave at the paraxial position, and the image-side surface of the fourth lens is convex at the paraxial position; the focal length of the imaging optical lens is f, the central radius of curvature of the object-side surface of the fourth lens at the paraxial position is R7, the central radius of curvature of the image-side surface of the fourth lens at the paraxial position is R8, the on-axis thickness of the fourth lens is d7, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

[0025] 2.45≤f4 / f≤14.08

[0026] 0.72≤(R7+R8) / (R7-R8)≤3.62;

[0027] 0.03≤d7 / TTL≤0.15.

[0028] Preferably, the object-side surface of the fifth lens is convex at the paraxial position; the image-side surface of the fifth lens is convex at the paraxial position; the focal length of the imaging optical lens is f, the central radius of curvature of the object-side surface of the fifth lens at the paraxial position is R9, the central radius of curvature of the image-side surface of the fifth lens at the paraxial position is R10, the axial thickness of the fifth lens is d9, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

[0029] 1.29≤f5 / f≤4.85;

[0030] 0.03≤(R9+R10) / (R9-R10)≤0.33;

[0031] 0.04≤d9 / TTL≤0.19.

[0032] Preferably, the first lens is made of glass.

[0033] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical characteristics, and has the characteristics of sufficient aberration correction, large aperture, wide angle and ultra-thinness. It is especially suitable for mobile phone camera lens assemblies and WEB camera lenses and automotive lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. 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 effort, wherein:

[0035] Figure 1 is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0036] Figure 2 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 1;

[0037] Figure 3 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 1;

[0038] Figure 4 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 1;

[0039] Figure 5 is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0040] Figure 6 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 5;

[0041] Figure 7 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 5;

[0042] Figure 8 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 5;

[0043] Figure 9 is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0044] Figure 10 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 9;

[0045] Figure 11 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 9;

[0046] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 9;

[0047] Figure 13 is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0048] Figure 14 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 13;

[0049] Figure 15 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 13;

[0050] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 13;

[0051] Figure 17 is a schematic diagram of the structure of the camera optical lens according to the fifth embodiment of the present invention;

[0052] Figure 18 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 17;

[0053] Figure 19 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 17;

[0054] Figure 20 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 17;

[0055] Figure 21 is a schematic diagram of the structure of the camera optical lens according to the sixth embodiment of the present invention;

[0056] Figure 22 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 21;

[0057] Figure 23 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 21;

[0058] Figure 24 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 21.

[0059] Figure 25 is a schematic diagram of the structure of the camera optical lens according to the seventh embodiment of the present invention;

[0060] Figure 26 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 25;

[0061] Figure 27 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 25;

[0062] Figure 28 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 25.

[0063] Figure 29 is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0064] Figure 30 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 29;

[0065] Figure 31 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 29;

[0066] Figure 32 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 29. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of the invention. However, the technical solutions claimed in this invention can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0068] Referring to Figures 1-28, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40, 50, 60, and 70. Figures 1, 5, 9, 13, 17, 21, and 25 show the camera optical lenses 10, 20, 30, 40, 50, 60, and 70 of the present invention, which together comprise seven lenses. Specifically, the camera optical lens, from the object side to the image side, consists of: a first lens L1, a second lens L2, a third lens L3, an aperture S1, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical filter GF or other optical elements may be disposed between the seventh lens L7 and the image plane S1.

[0069] 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. This combination of glass and resin lenses reduces chromatic aberration and improves the performance of the optical camera lens. Other materials can also be used for the individual lenses.

[0070] The focal length of the fourth lens L4 is defined as f4, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: 1.50≤f4 / f5≤3.40. This specifies the ratio of the focal lengths of the fourth and fifth lenses. Within the range of this condition, by reasonably allocating the optical focal length of the distribution system, it helps to smooth the light transition, resulting in better imaging quality and lower sensitivity of the system.

[0071] The central radius of curvature of the object side of the third lens L3 at the paraxial position is defined as R5, and the central radius of curvature of the image side of the third lens L3 at the paraxial position is defined as R6, satisfying the following relationship: 0.90≤R5 / R6≤1.40. This defines the shape of the third lens. Within the condition range, it can effectively mitigate the large-angle light rays that are deflected after passing through the first lens L1 and the second lens L2, and can effectively balance the field curvature of the system, making the field curvature offset of the central field of view less than 0.02mm.

[0072] The field of view (FOV) of the 1.0 field of view of the camera optical lens is defined as FOV, and the aperture value of the camera optical lens is Fno, satisfying the following relationship: 170.00≤FOV / Fno≤200.00. This specifies the range of the ratio between the field of view and the aperture. Within the range of the condition, an ultra-large aperture and an ultra-wide angle are achieved, meeting application requirements and expanding the application range of the product.

[0073] The Abbe number of the sixth lens L6 is defined as v6, and the Abbe number of the seventh lens L7 is defined as v7, satisfying the following relationship: v6-v7≥35.00. This specifies the difference in Abbe number between the cemented lenses. Within the range of the condition, material properties can be effectively allocated, chromatic aberration can be effectively corrected, and the chromatic aberration |LC|≤4μm can be achieved.

[0074] The axial distance from the image side surface of the seventh lens L7 to the image plane Si is defined as BF, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.09≤BF / TTL≤0.15. Within the range of the condition, the back focal length is reduced on the basis of miniaturization, which is beneficial to the assembly of the module.

[0075] The focal length of the second lens L2 is defined as f2, and the on-axis thickness of the second lens L2 is defined as d3, satisfying the following relationship: 8.80≤|f2 / d3|≤13.00. Within the range of the condition, it helps to buffer the change of the incident angle of light with a large angle of view, so that it can propagate smoothly in the optical imaging lens group, while maintaining the refractive power of the second lens to improve chromatic aberration and enhance image quality.

[0076] Under the conditions described above, camera optical lenses 10, 20, 30, 40, 50, 60, and 70 possess excellent optical performance while meeting the design requirements of large aperture and wide-angle. Based on the characteristics of these camera optical lenses 10, 20, 30, 40, 50, 60, and 70, they are particularly suitable for mobile phone camera lens assemblies and web camera lenses composed of high-pixel CCD, CMOS, and other imaging elements.

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

[0078] The object-side surface of the first lens L1 is convex near the axis, and the image-side surface is concave near the axis. The first lens L1 has negative refractive power. The object-side surface and image-side surface of the first lens L1 can also be configured with other concave and convex distributions.

[0079] The focal length of the camera optical lens is defined as f, and the focal length of the first lens L1 is f1, satisfying the following relationship: -13.18 ≤ f1 / f ≤ -3.84. This specifies the ratio of the negative refractive power of the first lens L1 to the overall focal length. Within the range of this condition, the first lens L1 has appropriate negative refractive power, which is beneficial for reducing system aberrations and also for the development of ultra-thin and wide-angle lenses. Preferably, it satisfies -8.24 ≤ f1 / f ≤ -4.80.

[0080] The central radius of curvature of the object-side surface of the first lens L1 at the paraxial position is defined as R1, and the central radius of curvature of the image-side surface of the first lens L1 at the paraxial position is defined as R2, satisfying the following relationship: 0.75≤(R1+R2) / (R1-R2)≤2.64. By reasonably controlling the shape of the first lens L1, it is possible to effectively correct the spherical aberration of the system. Preferably, it satisfies 1.19≤(R1+R2) / (R1-R2)≤2.11.

[0081] The first lens L1 has an on-axis thickness of d1, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 0.02≤d1 / TTL≤0.24. Within this range, miniaturization is advantageous. Preferably, 0.04≤d1 / TTL≤0.19 is satisfied.

[0082] The object-side surface of the second lens L2 is concave near the axis, and the image-side surface is also concave near the axis. 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 or convex distributions.

[0083] The focal length of the camera optical lens is defined as f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: -7.57 ≤ f2 / f ≤ -2.15. By controlling the negative optical power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the optical system. Preferably, it satisfies -4.73 ≤ f2 / f ≤ -2.69.

[0084] The object-side radius of curvature of the second lens L2 at the paraxial position is R3, and the image-side radius of curvature of the second lens L2 at the paraxial position is R4, satisfying the following relationship: 0.21≤(R3+R4) / (R3-R4)≤0.74. This defines the shape of the second lens L2. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting problems such as on-axis chromatic aberration. Preferably, it satisfies 0.34≤(R3+R4) / (R3-R4)≤0.60.

[0085] The second lens L2 has an on-axis thickness of d3, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.01≤d3 / TTL≤0.04. Within this range, miniaturization is advantageous. Preferably, 0.01≤d3 / TTL≤0.03 is satisfied.

[0086] The object-side surface of the third lens L3 is concave near the axis, and the image-side surface is convex near the axis. The third lens L3 has either positive or negative refractive power. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave or convex distributions.

[0087] The focal length of the camera optical lens is defined as f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: -3743.34 ≤ f3 / f ≤ 88.10. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -2339.59 ≤ f3 / f ≤ 70.48 is satisfied.

[0088] The central radius of curvature of the object-side surface of the third lens L3 at the paraxial position is R5, and the central radius of curvature of the image-side surface of the third lens L3 at the paraxial position is R6, satisfying the following relationship: -39.92≤(R5+R6) / (R5-R6)≤18.19. Within this range, the shape of the third lens L3 can be effectively controlled, which is beneficial to the forming of the third lens L3 and avoids poor forming and stress generation due to excessive surface curvature of the third lens L3. Preferably, -24.95≤(R5+R6) / (R5-R6)≤14.55 is satisfied.

[0089] The axial thickness of the third lens L3 is d5, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.07≤d5 / TTL≤0.25. Within this range, miniaturization is advantageous. Preferably, 0.12≤d5 / TTL≤0.20 is satisfied.

[0090] The object-side surface of the fourth lens L4 is concave near the axis, while the image-side surface is convex near the axis. The fourth lens L4 has positive refractive power. The object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave and convex distributions.

[0091] The focal length of the camera optical lens is defined as f, and the focal length of the fourth lens L4 is f4, satisfying the following relationship: 2.45≤f4 / f≤14.08. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 3.92≤f4 / f≤11.27.

[0092] The central radius of curvature of the object-side surface of the fourth lens L4 at the paraxial position is defined as R7, and the central radius of curvature of the image-side surface of the fourth lens L4 at the paraxial position is defined as R8, satisfying the following relationship: 0.72≤(R7+R8) / (R7-R8)≤3.62. This defines the shape of the fourth lens L4. Within the range of this condition, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations and other problems at off-axis angles. Preferably, it satisfies 1.16≤(R7+R8) / (R7-R8)≤2.90.

[0093] The fourth lens L4 has an on-axis thickness of d7, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.03≤d7 / TTL≤0.15. Within this range, miniaturization is advantageous. Preferably, 0.05≤d7 / TTL≤0.12 is satisfied.

[0094] The object-side surface of the fifth lens L5 is convex near the axis, and the image-side surface is also convex near the axis. The fifth lens L5 has positive refractive power. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions.

[0095] The focal length of the camera optical lens is defined as f, and the focal length of the fifth lens L5 is f5, satisfying the following relationship: 1.29 ≤ f5 / f ≤ 4.85. By limiting the fifth lens L5, the light angle of the camera optical lens can be effectively made smoother, reducing tolerance sensitivity. Preferably, it satisfies 2.06 ≤ f5 / f ≤ 3.88.

[0096] The fifth lens L5 has a central radius of curvature of R9 on its object-side surface and R10 on its image-side surface, satisfying the following relationship: 0.03 ≤ (R9 + R10) / (R9 - R10) ≤ 0.33. This defines the shape of the fifth lens L5. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 0.04 ≤ (R9 + R10) / (R9 - R10) ≤ 0.26.

[0097] The fifth lens L5 has an on-axis thickness of d9, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.04≤d9 / TTL≤0.19. Within this range, miniaturization is advantageous. Preferably, 0.07≤d9 / TTL≤0.16 is satisfied.

[0098] The object-side surface of the sixth lens L6 is concave near the axis, while the image-side surface is convex near the axis. The sixth lens L6 has positive refractive power. The object-side and image-side surfaces of the sixth lens L6 can also be configured with other concave and convex distributions.

[0099] The focal length of the camera optical lens is defined as f, and the focal length of the sixth lens L6 is f6, satisfying the following relationship: 0.86≤f6 / f≤2.89. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 1.38≤f6 / f≤2.31.

[0100] The central radius of curvature of the object-side surface of the sixth lens L6 at the paraxial position is R11, and the central radius of curvature of the image-side surface of the sixth lens L6 at the paraxial position is R12, satisfying the following relationship: 0.59≤(R11+R12) / (R11-R12)≤1.93. This defines the shape of the sixth lens L6. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations and other problems at off-axis drawing angles. Preferably, it satisfies 0.94≤(R11+R12) / (R11-R12)≤1.54.

[0101] The axial thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.06≤d11 / TTL≤0.22. Within this range, miniaturization is advantageous. Preferably, 0.10≤d11 / TTL≤0.17 is satisfied.

[0102] The object-side surface of the seventh lens L7 is concave near the axis, while the image-side surface is convex near the axis. The seventh lens L7 has negative refractive power. The object-side and image-side surfaces of the sixth lens L6 can also be configured with other concave and convex distributions.

[0103] The focal length of the camera optical lens is defined as f, and the focal length of the seventh lens L7 is f7, satisfying the following relationship: -4.26 ≤ f7 / f ≤ -1.22. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies -2.66 ≤ f7 / f ≤ -1.52.

[0104] The seventh lens L7 has a central radius of curvature of R13 on its object-side surface and R14 on its image-side surface, satisfying the following relationship: -3.05 ≤ (R13 + R14) / (R13 - R14) ≤ -0.98. This defines the shape of the seventh lens L7, which, within the specified range, is beneficial for correcting aberrations in off-axis drawing angles as ultra-thin and wide-angle lenses develop. Preferably, it satisfies -1.91 ≤ (R13 + R14) / (R13 - R14) ≤ -1.23.

[0105] The axial thickness of the seventh lens L7 is d13, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.02≤d13 / TTL≤0.06. Within this range, miniaturization is advantageous. Preferably, 0.02≤d13 / TTL≤0.05 is satisfied.

[0106] The field of view (FOV) of the camera optical lens is greater than or equal to 197.00°, thereby achieving wide-angle viewing.

[0107] The aperture value FNO of the camera optical lens is less than or equal to 1.10, thereby achieving a large aperture and good imaging performance.

[0108] The camera optical lens of the present invention will be described below with examples. The symbols described in each example are as follows. The units for focal length, on-axis distance, center radius of curvature, and on-axis thickness are mm.

[0109] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0110] Aperture value Fno: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0111] The technical solution of the present invention will now be described in detail with seven embodiments and one comparative embodiment.

[0112] (First Implementation)

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

[0114] Table 1

[0115] The meanings of each symbol are as follows.

[0116] S1: Aperture;

[0117] R: Radius of curvature at the center of the optical surface;

[0118] R1: The central radius of curvature of the object side surface of the first lens L1 at the paraxial position;

[0119] R2: The central radius of curvature of the image-side surface of the first lens L1 at the paraxial position;

[0120] R3: The central radius of curvature of the object side surface of the second lens L2 at the paraxial position;

[0121] R4: The central radius of curvature of the image-side surface of the second lens L2 at the paraxial position;

[0122] R5: The central radius of curvature of the object side surface of the third lens L3 at the paraxial position;

[0123] R6: The central radius of curvature of the image-side surface of the third lens L3 at the paraxial position;

[0124] R7: The central radius of curvature of the object side surface of the fourth lens L4 at the paraxial position;

[0125] R8: The central radius of curvature of the image-side surface of the fourth lens L4 at the paraxial position;

[0126] R9: The central radius of curvature of the object side surface of the fifth lens L5 at the paraxial position;

[0127] R10: The central radius of curvature of the image-side surface of the fifth lens L5 at the paraxial position;

[0128] R11: The central radius of curvature of the object side surface of the sixth lens L6 at the paraxial position;

[0129] R12: The central radius of curvature of the image-side surface of the sixth lens L6 at the paraxial position;

[0130] R13: The central radius of curvature of the object side surface of the seventh lens L7 at the paraxial position;

[0131] R14: The central radius of curvature of the image-side surface of the seventh lens L7 at the paraxial position;

[0132] R15: The radius of curvature of the center of the object side of the optical filter GF at the paraxial position;

[0133] R16: The central radius of curvature of the image-side surface of the optical filter GF at the paraxial position;

[0134] d: Axial thickness of the lens, axial distance between lenses;

[0135] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0136] d1: On-axis thickness of the first lens L1;

[0137] 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;

[0138] d3: On-axis thickness of the second lens L2;

[0139] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0140] d5: On-axis thickness of the third lens L3;

[0141] 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;

[0142] d7: On-axis thickness of the fourth lens L4;

[0143] 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;

[0144] d9: On-axis thickness of the fifth lens L5;

[0145] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0146] d11: On-axis thickness of the sixth lens L6;

[0147] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0148] d13: On-axis thickness of the seventh lens L7;

[0149] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0150] d15: On-axis thickness of the optical filter GF;

[0151] d16: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0152] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0153] nd1: The refractive index of the d-line of the first lens L1;

[0154] nd2: The refractive index of the d-line of the second lens L2;

[0155] nd3: The refractive index of the d-line of the third lens L3;

[0156] nd4: The refractive index of the d-line of the fourth lens L4;

[0157] nd5: The refractive index of the d-line of the fifth lens L5;

[0158] nd6: The refractive index of the d-line of the sixth lens L6;

[0159] nd7: The refractive index of the d-line of the seventh lens L7;

[0160] ndg: The refractive index of the d-line of the optical filter GF;

[0161] vd: Abbe number;

[0162] v1: Abbe number of the first lens L1;

[0163] v2: Abbe number of the second lens L2;

[0164] v3: Abbe number of the third lens L3;

[0165] v4: Abbe number of the fourth lens L4;

[0166] v5: Abbe number of the fifth lens L5;

[0167] v6: Abbe number of the sixth lens L6;

[0168] v7: Abbe number of the seventh lens L7;

[0169] vg: Abbe number of the optical filter GF.

[0170] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0171] Table 2

[0172] For convenience, the aspherical surfaces of each lens surface are those shown in formula (1) below. However, the present invention is not limited to the aspherical polynomial form represented by formula (1). z=(cr 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 (1)

[0173] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 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 a tangent plane at the vertex of the aspheric optical axis).

[0174] Figures 2 and 3 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm passes through the camera optical lens 10 of the first embodiment, respectively. Figure 4 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. In Figure 4, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0175] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 0.628 mm, the image height (IH) of the full field of view (1.0 field of view) is 1.088 mm, and the field of view (FOV) in the diagonal direction of the full field of view (1.0 field of view) is 197.00°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin design, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0176] It is understandable that the 1.0 field of view image height refers to half the diagonal length of the effective pixel area of ​​the sensor; the FOV in the diagonal direction of the 1.0 field of view refers to the field of view angle corresponding to the effective pixel area of ​​the sensor.

[0177] (Second Implementation)

[0178] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0179] Figure 5 shows the camera optical lens 20 of the second embodiment of the present invention.

[0180] Tables 3 and 4 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0181] Table 3

[0182] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0183] Table 4

[0184] Figures 6 and 7 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 20 of the second embodiment, respectively. Figure 8 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 20 of the second embodiment. In Figure 8, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0185] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 0.549 mm, the image height IH of the full field of view (1.0 field of view) is 1.044 mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 199.03°. The camera optical lens 20 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0186] (Third Implementation)

[0187] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0188] Figure 9 shows the camera optical lens 30 of the third embodiment of the present invention.

[0189] Tables 5 and 6 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0190] Table 5

[0191] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0192] Table 6

[0193] Figures 10 and 11 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 30 of the third embodiment, respectively. Figure 12 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 30 of the third embodiment. In Figure 12, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0194] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 0.599mm, the image height IH of the full field of view (1.0 field of view) is 1.029mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 197.10°. The camera optical lens 30 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0195] (Fourth Implementation)

[0196] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0197] Figure 13 shows the camera optical lens 40 of the fourth embodiment of the present invention.

[0198] Tables 7 and 8 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0199] Table 7

[0200] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0201] Table 8

[0202] Figures 14 and 15 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 40 of the fourth embodiment, respectively. Figure 16 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 40 of the fourth embodiment. In Figure 16, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0203] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 0.496mm, the image height IH of the full field of view (1.0 field of view) is 1.057mm, and the field of view (FOV) in the diagonal direction of the full field of view (1.0 field of view) is 196.86°. The camera optical lens 40 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0204] (Fifth Implementation)

[0205] The symbols in the fifth embodiment have the same meanings as those in the first embodiment.

[0206] Figure 17 shows the camera optical lens 50 of the fifth embodiment of the present invention.

[0207] Tables 9 and 10 show the design data of the camera optical lens 50 according to the fifth embodiment of the present invention.

[0208] Table 9

[0209] Table 10 shows the aspherical data of each lens in the camera optical lens 50 of the fifth embodiment of the present invention.

[0210] Table 10

[0211] Figures 18 and 19 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 50 of the fifth embodiment, respectively. Figure 20 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 50 of the fifth embodiment. In Figure 20, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0212] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 0.544mm, the image height IH of the full field of view (1.0 field of view) is 1.053mm, and the field of view (FOV) in the diagonal direction of the full field of view (1.0 field of view) is 199.20°. The camera optical lens 50 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0213] (Sixth Implementation Method)

[0214] The symbols in the sixth embodiment have the same meanings as those in the first embodiment.

[0215] Figure 21 shows the camera optical lens 60 according to the sixth embodiment of the present invention.

[0216] Tables 11 and 12 show the design data of the camera optical lens 60 according to the sixth embodiment of the present invention.

[0217] Table 11

[0218] Table 12 shows the aspherical data of each lens in the camera optical lens 60 of the sixth embodiment of the present invention.

[0219] Table 12

[0220] Figures 22 and 23 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 60 of the sixth embodiment, respectively. Figure 24 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 60 of the sixth embodiment. In Figure 24, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0221] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 0.686 mm, the image height IH of the full field of view (1.0 field of view) is 1.052 mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 198.00°. The camera optical lens 60 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0222] (Seventh Implementation)

[0223] The symbols in the seventh embodiment have the same meanings as those in the first embodiment.

[0224] Figure 25 shows the camera optical lens 70 of the seventh embodiment of the present invention.

[0225] Tables 13 and 14 show the design data of the camera optical lens 70 according to the seventh embodiment of the present invention.

[0226] Table 13

[0227] Table 14 shows the aspherical data of each lens in the camera optical lens 70 of the seventh embodiment of the present invention.

[0228] Table 14

[0229] Figures 26 and 27 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 70 of the seventh embodiment, respectively. Figure 28 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 70 of the seventh embodiment. In Figure 28, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0230] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 70 is 0.618 mm, the image height IH of the full field of view (1.0 field of view) is 1.016 mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 197.00°. The camera optical lens 70 meets the design requirements of large aperture, wide angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0231] (Comparative Implementation Methods)

[0232] The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0233] Figure 29 shows the camera optical lens 80 of the comparative embodiment of the present invention.

[0234] Tables 15 and 16 show the design data of the camera optical lens 80 of the comparative embodiment of the present invention.

[0235] Table 15

[0236] Table 16 shows the aspherical data of each lens in the camera optical lens 80 of the comparative embodiment of the present invention.

[0237] Table 16

[0238] Figures 30 and 31 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the camera optical lens 80 of the comparative embodiment, respectively. Figure 32 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555 nm passes through the camera optical lens 80 of the comparative embodiment. In Figure 32, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0239] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 80 is 0.600mm, the image height IH of the full field of view (1.0 field of view) is 1.050mm, and the field of view (FOV) of the full field of view (1.0 field of view) diagonal direction is 188.69°. In the camera optical lens 80, R5 / R6 = 1.47, which does not meet the requirement of 0.90≤R5 / R6≤1.40. Therefore, it cannot meet the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are not fully corrected, and it does not have excellent optical characteristics.

[0240] Table 17

[0241] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can 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 seven lenses, which are arranged in the following order from the object side to the image side: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. Wherein, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the central radius of curvature of the object-side surface of the third lens at the paraxial position is R5, the central radius of curvature of the image-side surface of the third lens at the paraxial position is R6, the field of view of the imaging optical lens at 1.0 field of view is FOV, and the aperture value of the imaging optical lens is Fno, and the following relationship is satisfied: 1.50≤f4 / f5≤3.40; 0.90≤R5 / R6≤1.40; 170.00≤FOV / Fno≤200.

00.

2. The camera optical lens according to claim 1, characterized in that, The Abbe number of the sixth lens is v6, and the Abbe number of the seventh lens is v7, satisfying the following relationship: v6-v7≥35.

00.

3. The camera optical lens according to claim 1, wherein, The axial distance from the image side surface of the seventh lens to the image plane is BF, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.09≤BF / TTL≤0.

15.

4. The camera optical lens according to claim 1, characterized in that, The focal length of the second lens is f2, and the on-axis thickness of the second lens is d3, satisfying the following relationship: 8.80≤|f2 / d3|≤13.

00.

5. The camera 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 focal length of the camera optical lens is f, the focal length of the first lens is f1, the central radius of curvature of the object-side surface of the first lens at the paraxial position is R1, the central radius of curvature of the image-side surface of the first lens at the paraxial position is R2, the on-axis thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -13.18≤f1 / f≤-3.84; 0.75≤(R1+R2) / (R1-R2)≤2.64; 0.02≤d1 / TTL≤0.

24.

6. The camera optical lens according to claim 1, characterized in that, The object-side surface of the second lens is concave at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position. The focal length of the camera optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object-side surface of the second lens at the paraxial position is R3, the central radius of curvature of the image-side surface of the second lens at the paraxial position is R4, the on-axis thickness of the second lens is d3, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -7.57≤f² / f≤-2.15; 0.21≤(R3+R4) / (R3-R4)≤0.74; 0.01≤d3 / TTL≤0.

04.

7. The camera optical lens according to claim 1, characterized in that, The object-side surface of the third lens is concave near the axis, and the image-side surface of the third lens is convex near the axis. The focal length of the camera optical lens is f, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -3743.34≤f3 / f≤88.10; -39.92≤(R5+R6) / (R5-R6)≤18.19; 0.07≤d5 / TTL≤0.

25.

8. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fourth lens is concave near the axis, and the image-side surface of the fourth lens is convex near the axis. The focal length of the camera optical lens is f, the central radius of curvature of the object-side surface of the fourth lens at the paraxial position is R7, the central radius of curvature of the image-side surface of the fourth lens at the paraxial position is R8, the on-axis thickness of the fourth lens is d7, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 2.45≤f4 / f≤14.08 0.72≤(R7+R8) / (R7-R8)≤3.62; 0.03≤d7 / TTL≤0.

15.

9. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fifth lens is convex at the paraxial position; the image-side surface of the fifth lens is convex at the paraxial position. The focal length of the camera optical lens is f, the central radius of curvature of the object-side surface of the fifth lens at the paraxial position is R9, the central radius of curvature of the image-side surface of the fifth lens at the paraxial position is R10, the on-axis thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 1.29≤f5 / f≤4.85; 0.03≤(R9+R10) / (R9-R10)≤0.33; 0.04≤d9 / TTL≤0.

19.

10. The camera optical lens according to claim 1, characterized in that, The first lens is made of glass.

Images