Camera lens

Abstract

This invention relates to the field of optical lenses and discloses a camera optical lens comprising seven lenses, arranged sequentially from the object side to the image side: 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 negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; the third lens has a focal length of f3, the sixth lens has a focal length of f6, the second lens has an on-axis thickness of d3, and the distance from the image side of the second lens to the image side is... The axial distance between the object sides of the three lenses is d4, the axial thickness of the third lens is d5, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, the central radius of curvature of the object side of the sixth lens is R11, and the central radius of curvature of the image side of the sixth lens is R12, satisfying the following relationships: 0.12≤f3*d5 / (R5+R6)≤0.30; 2.20≤(R11+R12) / f6≤4.00; 4.00≤(d3+d5) / d4≤8.50.

Description

[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 and PC 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 the 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, small size, and adequate aberration correction. [Summary of the Invention]

[0003] 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 large aperture, ultra-thin design, and wide-angle capability.

[0004] To solve the above-mentioned technical problems, the embodiments of the present invention provide a camera optical lens, which comprises seven lenses in total. The seven lenses are arranged in the following order from the object side to the image side: 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 negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power.

[0005] The third lens has a focal length of f3, the sixth lens has a focal length of f6, the second lens has an axial thickness of d3, the axial distance from the image-side surface of the second lens to the object-side surface of the third lens is d4, the third lens has an axial thickness of d5, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, the central radius of curvature of the object-side surface of the sixth lens is R11, and the central radius of curvature of the image-side surface of the sixth lens is R12, satisfying the following relationship:

[0006] 0.12≤f3*d5 / (R5+R6)≤0.30;

[0007] 2.20≤(R11+R12) / f6≤4.00;

[0008] 4.00≤(d3+d5) / d4≤8.50.

[0009] Preferably, the central radius of curvature of the object side of the seventh lens is R13, and the central radius of curvature of the image side of the seventh lens is R14, and the following relationship is satisfied:

[0010] 2.00≤R13 / R14≤3.50.

[0011] Preferably, the Abbe number of the first lens is v1, the Abbe number of the second lens is v2, and they satisfy the following relationship:

[0012] 36.00≤v1-v2≤64.00.

[0013] Preferably, the focal length of the camera optical lens is f, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, and they satisfy the following relationship:

[0014] 2≤(f4-f5) / f≤5.00.

[0015] Preferably, the first lens has positive refractive power, the object side of the first lens is convex at the paraxial position, and the image side of the first lens is concave at the paraxial position.

[0016] 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 of the first lens is R1, the central radius of curvature of the image side of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

[0017] 1.00≤f1 / f≤1.13;

[0018] -2.51≤(R1+R2) / (R1-R2)≤-2.01;

[0019] 0.12≤d1 / TTL≤0.14.

[0020] Preferably, the second lens has negative refractive power, the object side of the second lens is convex at the paraxial position, and the image side of the second lens is concave at the paraxial position;

[0021] 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 of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

[0022] -5.10≤f² / f≤-2.44;

[0023] 4.82≤(R3+R4) / (R3-R4)≤7.65;

[0024] 0.03≤d3 / TTL≤0.04.

[0025] Preferably, the third lens has positive refractive power, the object-side surface of the third lens is convex at the paraxial position, and the image-side surface of the third lens is concave at the paraxial position.

[0026] The focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0027] 2.06≤f3 / f≤2.64;

[0028] -1.99≤(R5+R6) / (R5-R6)≤-1.34;

[0029] 0.05≤d5 / TTL≤0.08.

[0030] Preferably, the fourth lens has negative refractive power, and the object-side surface of the fourth lens is concave near the axis;

[0031] The focal length of the camera optical lens is f, the focal length of the fourth lens is f4, the central radius of curvature of the object side of the fourth lens is R7, the central radius of curvature of the image side of the fourth lens 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:

[0032] -5.65≤f4 / f≤-2.36;

[0033] -2.94≤(R7+R8) / (R7-R8)≤-0.22;

[0034] 0.04≤d7 / TTL≤0.07.

[0035] Preferably, the fifth lens has negative refractive power, the object-side surface of the fifth lens is concave at the paraxial position, and the image-side surface of the fifth lens is concave at the paraxial position.

[0036] The focal length of the camera optical lens is f, the focal length of the fifth lens is f5, the central radius of curvature of the object side of the fifth lens is R9, the central radius of curvature of the image side of the fifth lens 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:

[0037] -9.06≤f5 / f≤-4.36;

[0038] -1.72≤(R9+R10) / (R9-R10)≤0.96;

[0039] 0.05≤d9 / TTL≤0.08.

[0040] Preferably, the sixth lens has positive refractive power, the object side of the sixth lens is convex at the paraxial position, and the image side of the sixth lens is concave at the paraxial position;

[0041] The focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the on-axis thickness of the fifth lens is d11, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0042] 1.35≤f6 / f≤1.53;

[0043] -1.66≤(R11+R12) / (R11-R12)≤-1.33;

[0044] 0.07≤d11 / TTL≤0.11.

[0045] Preferably, the seventh lens has negative refractive power, the object-side surface of the seventh lens is convex at the paraxial position, and the image-side surface of the seventh lens is concave at the paraxial position.

[0046] The focal length of the camera optical lens is f, the focal length of the seventh lens is f7, the central radius of curvature of the object side of the seventh lens is R13, the central radius of curvature of the image side of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0047] -1.64≤f7 / f≤-0.84;

[0048] 1.80≤(R13+R14) / (R13-R14)≤3.00;

[0049] 0.05≤d13 / TTL≤0.13.

[0050] Preferably, the first lens is made of glass.

[0051] 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 large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. [Attached Image Description]

[0052] 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:

[0053] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0054] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0055] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0056] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0057] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0058] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0059] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0060] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0061] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0062] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0063] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0064] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0065] Figure 13This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0066] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0067] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0068] Figure 16 yes Figure 13 The diagram shows the field curvature and distortion of the camera lens.

Detailed Implementation Methods

[0069] 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.

[0070] Referring to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5 Figures 9 and 13 show the imaging optical lenses 10, 20, 30, and 40 of the present invention, which include seven lenses. Specifically, the imaging optical lenses 10, 20, 30, and 40, from the object side to the image side, include, in sequence: a first lens L1, a second lens L2, an aperture S1, a third lens L3, 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 Si.

[0071] The first lens L1 is made of plastic, the second lens L2 is made of glass or 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. Other materials may also be used for the lenses.

[0072] The focal length of the third lens L3 is defined as f3, the on-axis thickness of the third lens L3 is d5, the central radius of curvature of the object side of the third lens L3 is R5, and the central radius of curvature of the image side of the third lens L3 is R6. 0.12≤f3*d5 / (R5+R6)≤0.30. Within the range of the condition formula, it helps to control the shape of the third lens L3 and facilitates its shaping.

[0073] The central radius of curvature of the object side of the sixth lens L6 is defined as R11, the central radius of curvature of the image side of the sixth lens L6 is defined as R12, and the focal length of the sixth lens L6 is f6. 2.20≤(R11+R12) / f6≤4.00. This conditional formula can reasonably control the surface shape of the sixth lens L6, which helps to reduce the system sensitivity and also reduces stray light generated by the lens, thereby improving the image quality of the lens.

[0074] The on-axis thickness of the second lens L2 is defined as d3, the on-axis distance from the image side of the second lens L2 to the object side of the third lens L3 is defined as d4, and the on-axis thickness of the third lens L3 is defined as d5. 4.00≤(d3+d5) / d4≤8.50 specifies the ratio of the sum of the on-axis thicknesses of the second lens L2 and the third lens L3 to the air gap between the second lens L2 and the third lens L3. Within the range of the conditional formula, this helps to compress the total length of the optical system.

[0075] The central radius of curvature of the object side of the seventh lens L7 is defined as R13, and the central radius of curvature of the image side of the seventh lens L7 is defined as R14, and the following relationship is satisfied: 2.00≤R13 / R14≤3.50. This defines the shape of the seventh lens. Within the range of the condition, it is beneficial to mitigate the degree of light deflection after passing through the lens and can effectively reduce aberrations.

[0076] The Abbe number of the first lens L1 is defined as v1, and the Abbe number of the second lens L2 is defined as v2, and the following relationship is satisfied: 36.00≤v1-v2≤64.00. This specifies the difference between the Abbe numbers of the first lens L1 and the second lens L2. Within this range, material properties can be effectively allocated, chromatic aberration can be effectively corrected, and the chromatic aberration |LC|≤3μm can be achieved.

[0077] The focal length of the camera optical lens 10 is defined as f, the focal length of the fourth lens L4 is f4, and the focal length of the fifth lens L5 is f5, and the following relationship is satisfied: 2≤(f4-f5) / f≤5.00. By reasonably allocating the optical focal length of the distribution system, the system has better imaging quality and lower sensitivity.

[0078] Under the above conditions, the camera optical lenses 10, 20, 30, and 40 have good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thin design. Based on the characteristics of the camera optical lenses 10, 20, 30, and 40, they are particularly suitable for mobile phone camera lens assemblies and web camera lenses composed of high-pixel CCD, CMOS, and other camera elements.

[0079] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0080] 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 positive 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.

[0081] The focal length of the camera optical lens is f, and the focal length of the first lens L1 is f1, and they satisfy the following relationship: 1.00≤f1 / f≤1.13. By controlling the positive optical power of the first lens L1 within a reasonable range, it is beneficial to correct the aberrations of the optical system.

[0082] The central radius of curvature of the object side of the first lens L1 is R1, and the central radius of curvature of the image side of the first lens L1 is defined as R2, and the following relationship is satisfied: -2.51≤(R1+R2) / (R1-R2)≤-2.01. By reasonably controlling the shape of the first lens L1, the first lens L1 can effectively correct the spherical aberration of the system.

[0083] The on-axis thickness of the first lens L1 is d1, and the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.12≤d1 / TTL≤0.14. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0084] The object-side surface of the second lens L2 is convex near the axis, and the image-side surface is 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 and convex distributions.

[0085] The focal length of the second lens L2 is f2, and it satisfies the following relationship: -5.10≤f2 / f≤-2.44. By controlling the positive power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the optical system.

[0086] The center radius of curvature of the object side of the second lens L2 is R3, and the center radius of curvature of the image side of the second lens L2 is R4, and they satisfy the following relationship: 4.82≤(R3+R4) / (R3-R4)≤7.65, which defines the shape of the second lens L2. When within this range, as lenses develop towards ultra-thin and wide-angle lenses, it is beneficial to correct on-axis chromatic aberration.

[0087] The on-axis thickness of the second lens L2 is d3, and the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.03≤d3 / TTL≤0.04. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0088] The object-side surface of the third lens L3 is convex near the axis, and the image-side surface is concave near the axis. The third lens L3 has positive refractive power. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.

[0089] The focal length of the third lens L3 is f3, and it satisfies the following relationship: 2.06≤f3 / f≤2.64. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0090] The central radius of curvature of the object side of the third lens L3 is R5, and the central radius of curvature of the image side of the third lens L3 is R6, and the following relationship is satisfied: -1.99≤(R5+R6) / (R5-R6)≤-1.34, which specifies the shape of the third lens L3. Within the range specified by the condition, the degree of refraction of light passing through the lens can be mitigated, and aberrations can be effectively reduced.

[0091] The on-axis thickness of the third lens L3 is d5, and the total optical length of the camera lens 10 is TTL, and the following relationship is satisfied: 0.05≤d5 / TTL≤0.08, which helps with lens assembly and effectively controls lens thickness and total lens length.

[0092] The object-side surface of the fourth lens L4 is concave near the axis, while the image-side surface is either concave or convex near the axis. The fourth lens L4 has negative refractive power. The object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave or convex distributions.

[0093] The focal length of the fourth lens L4 is f4, and it satisfies the following relationship: -5.65≤f4 / f≤-2.36. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0094] The central radius of curvature of the object side of the fourth lens L4 is R7, and the central radius of curvature of the image side of the fourth lens L4 is R8, and they satisfy the following relationship: -2.94≤(R7+R8) / (R7-R8)≤-0.22, which defines the shape of the fourth lens L4. When within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0095] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the camera lens is TTL, and the following relationship is satisfied: 0.04≤d7 / TTL≤0.07. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0096] The object-side surface of the fifth lens L5 is concave near the axis, and the image-side surface is also concave near the axis. The fifth lens L5 has negative refractive power. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave or convex distributions.

[0097] The focal length of the fifth lens L5 is f5, and it satisfies the following relationship: -9.06≤f5 / f≤-4.36. The limitation of the fifth lens L5 can effectively make the light angle of the camera optical lens 10 smooth and reduce the tolerance sensitivity.

[0098] The central radius of curvature of the object side of the fifth lens L5 is R9, and the central radius of curvature of the image side of the fifth lens L5 is R10, and they satisfy the following relationship: -1.72≤(R9+R10) / (R9-R10)≤0.96, which defines the shape of the fifth lens L5. When within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0099] The on-axis thickness of the fifth lens L5 is d9, and it satisfies the following relationship: 0.05≤d9 / TTL≤0.08, which helps with lens assembly and effectively controls lens thickness and overall lens length.

[0100] The object-side surface of the sixth lens L6 is convex near the axis, and the image-side surface is concave 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.

[0101] The focal length of the sixth lens L6 is f6, and it satisfies the following relationship: 1.35≤f6 / f≤1.53. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0102] The central radius of curvature of the object side of the sixth lens L6 is R11, and the central radius of curvature of the image side of the sixth lens L6 is R12, and they satisfy the following relationship: -1.66≤(R11+R12) / (R11-R12)≤-1.33, which defines the shape of the sixth lens L6. Within the specified range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0103] The on-axis thickness of the sixth lens L6 is d11, and it satisfies the following relationship: 0.07≤d11 / TTL≤0.11. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0104] The object-side surface of the seventh lens L7 is convex near the axis, while the image-side surface is concave near the axis. The seventh lens L7 has negative refractive power. The object-side and image-side surfaces of the seventh lens L7 can also be configured with other concave and convex distributions.

[0105] The focal length of the seventh lens L7 is f7, and it satisfies the following relationship: -1.64≤f7 / f≤-0.84. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0106] The central radius of curvature of the object side of the seventh lens L7 is R13, and the central radius of curvature of the image side of the seventh lens is R14, and they satisfy the following relationship: 1.80≤(R13+R14) / (R13-R14)≤3.00. This defines the shape of the seventh lens L7. Within the specified range, with the development of ultra-thin wide-angle lenses, this is beneficial for correcting aberrations and other problems in off-axis drawing angles.

[0107] The on-axis thickness of the seventh lens L7 is d13, and it satisfies the following relationship: 0.05≤d13 / TTL≤0.13. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[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] Image height IH of 1.0 field of view: The field of view height corresponding to the effective pixel of the sensor (i.e., half the diagonal length of the effective pixel area of ​​the sensor);

[0112] 1.0 Field of View (FOV): The field of view angle corresponding to the effective pixel of the sensor;

[0113] Image height IHm of MIC field of view: The field of view height extended beyond 1.0 to prevent assembly deviation;

[0114] FOVm: The field of view angle corresponding to the image height of the MIC field of view;

[0115] Preferably, the object-side and / or image-side surfaces of the lens may also be provided with inflection points and / or stagnation points to meet the requirements of high-quality imaging.

[0116] The technical solution of the present invention will be described in detail below with four embodiments. The technical effects of the present invention cannot be achieved when the above-described conditions are not met.

[0117] (First Implementation)

[0118] Table 1 shows the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0119] Table 1

[0120]

[0121]

[0122] The meanings of each symbol are as follows.

[0123] S1: Aperture;

[0124] R: Radius of curvature at the center of the optical surface;

[0125] R1: Central radius of curvature of the object-side surface of the first lens L1; R2: Central radius of curvature of the image-side surface of the first lens L1; R3: Central radius of curvature of the object-side surface of the second lens L2; ​​R4: Central radius of curvature of the image-side surface of the second lens L2; ​​R5: Central radius of curvature of the object-side surface of the third lens L3; R6: Central radius of curvature of the image-side surface of the third lens L3; R7: Central radius of curvature of the object-side surface of the fourth lens L4; R8: Central radius of curvature of the image-side surface of the fourth lens L4; R9: Central radius of curvature of the object-side surface of the fifth lens L5; R10: Central radius of curvature of the image-side surface of the fifth lens L5; R11: Central radius of curvature of the object-side surface of the sixth lens L6.

[0126] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0127] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0128] R14: The central radius of curvature of the image side of the seventh lens L7; R15: The radius of curvature of the object side of the optical filter GF;

[0129] R16: Radius of curvature of the image-side surface of the optical filter GF;

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

[0131] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0132] d1: On-axis thickness of the first lens L1;

[0133] 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;

[0134] d3: On-axis thickness of the second lens L2;

[0135] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0136] d5: On-axis thickness of the third lens L3;

[0137] 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;

[0138] d7: On-axis thickness of the fourth lens L4;

[0139] 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;

[0140] d9: On-axis thickness of the fifth lens L5;

[0141] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0142] d11: On-axis thickness of the sixth lens L6;

[0143] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0144] d13: On-axis thickness of the seventh lens L7;

[0145] d14: The axial distance from the image-side surface of the seventh lens L7 to the object-side surface of the eighth lens L8;

[0146] d15: On-axis thickness of the optical filter GF;

[0147] d16: The axial distance from the image-side surface of the optical filter GF to the image plane;

[0148] nd: Refractive index of the d-line;

[0149] nd1: The refractive index of the d-line of the first lens L1;

[0150] nd2: The refractive index of the d-line of the second lens L2;

[0151] nd3: The refractive index of the d-line of the third lens L3;

[0152] nd4: The refractive index of the d-line of the fourth lens L4;

[0153] nd5: The refractive index of the d-line of the fifth lens L5;

[0154] nd6: The refractive index of the d-line of the sixth lens L6;

[0155] nd7: The refractive index of the d-line of the seventh lens L7;

[0156] ndg: The refractive index of the d-line of the optical filter GF;

[0157] vd: Abbe number;

[0158] v1: Abbe number of the first lens L1;

[0159] v2: Abbe number of the second lens L2;

[0160] v3: Abbe number of the third lens L3;

[0161] v4: Abbe number of the fourth lens L4;

[0162] v5: Abbe number of the fifth lens L5;

[0163] v6: Abbe number of the sixth lens L6;

[0164] v7: Abbe number of the seventh lens L7;

[0165] vg: Abbe number of the optical filter GF.

[0166] Tables 2 and 3 show the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0167] Table 2

[0168]

[0169] Table 3

[0170]

[0171] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0172] 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 +A16r 16

[0173] +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0174] 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 a tangent plane at the vertex of the aspheric optical axis).

[0175] Figure 2 , Figure 3A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 435nm passes through the camera optical lens 10 of the first embodiment. Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0176] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens is 2.831 mm, the image height IH of the 1.0 field of view is 5.000 mm, the field of view FOV of the 1.0 field of view is 85.52°, the image height IHm of the MIC field of view is 5.200 mm, and the field of view FOVm of the MIC field of view is 88.11°. The camera optical lens 10 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.

[0177] (Second Implementation)

[0178] The second implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0179] In this embodiment, the image-side surface of the fourth lens L4 is convex at the paraxial position. Table 4 shows the design data of the camera optical lens 20 of the second embodiment of the present invention.

[0180] Table 4

[0181]

[0182]

[0183] Tables 5 and 6 show the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0184] Table 5

[0185]

[0186] Table 6

[0187]

[0188]

[0189] Figure 6 , Figure 7Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 435nm passes through the camera optical lens 20 of the second embodiment.

[0190] Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0191] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 2.915mm, the image height IH of the 1.0 field of view is 5.000mm, the field of view FOV of the 1.0 field of view is 78.53°, the image height IHm of the MIC field of view is 5.200mm, and the field of view FOVm of the MIC field of view is 80.91°. 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.

[0192] (Third Implementation)

[0193] The third implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0194] In this embodiment, the image-side surface of the fourth lens L4 is convex at the paraxial position.

[0195] Table 7 shows the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0196] Table 7

[0197]

[0198]

[0199] Tables 8 and 9 show the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0200] Table 8

[0201]

[0202]

[0203] Table 9

[0204]

[0205] Figure 10 , Figure 11A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 435nm passes through the camera optical lens 30 of the third embodiment. Figure 12 This illustrates the field curvature and distortion of light with a wavelength of 555nm after passing through the camera optical lens 30 of the third embodiment. Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0206] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 2.838 mm, the image height IH of the 1.0 field of view is 5.000 mm, the field of view FOV of the 1.0 field of view is 79.38°, the image height IHm of the MIC field of view is 5.200 mm, and the field of view FOVm of the MIC field of view is 81.82°. 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.

[0207] (Fourth Implementation)

[0208] The fourth implementation method is basically the same as the first implementation method, and the symbols have the same meanings as those in the first implementation method.

[0209] Table 10 shows the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0210] Table 10

[0211]

[0212] Tables 11 and 12 show the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0213] Table 11

[0214]

[0215] Table 12

[0216]

[0217]

[0218] Figure 14 , Figure 15 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 435nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16This illustrates the field curvature and distortion of light with a wavelength of 555nm after passing through the camera optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0219] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens is 2.876 mm, the image height IH of the 1.0 field of view is 5.000 mm, the field of view FOV of the 1.0 field of view is 80.90°, the image height IHm of the MIC field of view is 5.200 mm, and the field of view FOVm of the MIC field of view is 83.70°. 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.

[0220] Table 13, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in the conditional expressions in each of the first, second, third, and fourth embodiments.

[0221] Table 13

[0222]

[0223]

[0224] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection 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 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 negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The object-side surface of the first lens is convex at the paraxial direction, and the image-side surface of the first lens is concave at the paraxial direction. The object-side surface of the second lens is convex at the paraxial direction, and the image-side surface of the second lens is concave at the paraxial direction. The object-side surface of the third lens is convex at the paraxial direction, and the image-side surface of the third lens is concave at the paraxial direction. The object-side surface of the fourth lens is concave at the paraxial direction. The object-side surface of the fifth lens is concave at the paraxial direction. The object-side surface of the sixth lens is convex at the paraxial direction, and the image-side surface of the sixth lens is concave at the paraxial direction. The object-side surface of the seventh lens is convex at the paraxial direction, and the image-side surface of the seventh lens is concave at the paraxial direction. The focal length of the camera optical lens is f, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the axial thickness of the second lens is d3, the axial distance from the image side of the second lens to the object side of the third lens is d4, the axial thickness of the third lens is d5, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, the central radius of curvature of the object side of the sixth lens is R11, and the central radius of curvature of the image side of the sixth lens is R12, satisfying the following relationship: 0.12≤f3 d5 / (R5+R6)≤0.30; 2.20≤(R11+R12) / f6≤4.00; 4.00≤(d3+d5) / d4≤8.50; 2≤(f4-f5) / f≤5.

00.

2. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object side of the seventh lens is R13, and the central radius of curvature of the image side of the seventh lens is R14, and they satisfy the following relationship: 2.00≤R13 / R14≤3.

50.

3. The camera optical lens according to claim 1, characterized in that, The Abbe number of the first lens is v1, and the Abbe number of the second lens is v2, and they satisfy the following relationship: 36.00≤v1-v2≤64.

00.

4. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens 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: 1.00≤f1 / f≤1.13; -2.51≤(R1+R2) / (R1-R2)≤-2.01; 0.12 ≤d1 / TTL≤0.

14.

5. The camera optical lens according to claim 1, characterized in that, The focal length of the second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, and the total optical length of the camera lens is TTL, satisfying the following relationship: -5.10≤f² / f≤-2.44; 4.82≤(R3+R4) / (R3-R4)≤7.65; 0.03≤d3 / TTL≤0.

04.

6. The camera optical lens according to claim 1, characterized in that, The total optical length of the camera lens is TTL, and satisfies the following relationship: 2.06≤f3 / f≤2.64; -1.99≤(R5+R6) / (R5-R6)≤-1.34; 0.05≤d5 / TTL≤0.

08.

7. The camera optical lens according to claim 1, characterized in that, The fourth lens has a central radius of curvature of R7 on the object side and R8 on the image side. The fourth lens has an axial thickness of d7, and the total optical length of the imaging lens is TTL, satisfying the following relationship: -5.65≤f4 / f≤-2.36; -2.94≤(R7+R8) / (R7-R8)≤-0.22; 0.04≤d7 / TTL≤0.

07.

8. The camera optical lens according to claim 1, characterized in that, The image-side surface of the fifth lens is concave at the paraxial position; The fifth lens has a central radius of curvature of R9 on the object side and R10 on the image side. The fifth lens has an axial thickness of d9, and the total optical length of the imaging lens is TTL, satisfying the following relationship: -9.06≤f5 / f≤-4.36; -1.72≤(R9+R10) / (R9-R10)≤0.96; 0.05≤d9 / TTL≤0.

08.

9. The camera optical lens according to claim 1, characterized in that, The sixth lens has a focal length of f6, the fifth lens has an on-axis thickness of d11, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: 1.35≤f6 / f≤1.53; -1.66≤(R11+R12) / (R11-R12)≤-1.33; 0.07≤d11 / TTL≤0.

11.

10. The camera optical lens according to claim 1, characterized in that, The seventh lens has a focal length of f7, a central radius of curvature of the object side of the seventh lens of R13, a central radius of curvature of the image side of the seventh lens of R14, an axial thickness of d13, and a total optical length of TTL, satisfying the following relationship: -1.64≤f7 / f≤-0.84; 1.80≤(R13+R14) / (R13-R14)≤3.00; 0.05≤d13 / TTL≤0.

13.

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

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