Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises seven lenses in sequence from the object side to the image side, namely 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 focal length of the optical camera lens is f, the total optical length of the optical camera lens is TTL, the field of view of the optical camera lens is FOV, the focal length of the first lens is f1, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the image side surface of the third lens is R6, the radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the image side surface of the fourth lens is R8. The following relationships are met: 2.40 <= (f6-f7) / f1 <= 3.20; 0.90 <= TTL / (f*tan(FOV / 2)) <= 1.40; 0.30 <= R5 / R6 <= 0.80; and -15.0 <= (R7+R8) / (R7-R8) <= -1.50.

Description

Technical Field

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

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera optical lenses has been increasing. Due to the shrinking pixel size of photosensitive devices and the trend towards lightweight, portable electronic products with high functionality, miniaturized camera optical lenses with excellent imaging quality have become the mainstream in the market. To achieve optimal imaging quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasing user demands, as the pixel size of photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, seven-element lens structures are gradually emerging in lens designs. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, a compact size, and sufficient aberration compensation. Summary of the Invention

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

[0004] To achieve the above-mentioned object, the technical solution of the present invention provides a camera optical lens, which comprises a total of seven lenses, wherein the seven lenses are, in 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; wherein the focal length of the optical camera lens is f, the total optical length of the optical camera lens is TTL, the field of view angle of 1.0 of the optical camera lens is FOV, and the focal length of the first lens is The focal length of the sixth lens is f1, the focal length of the seventh lens is f7, the central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side of the third lens is R6, the central curvature radius of the object side of the fourth lens is R7, and the central curvature radius of the image side of the fourth lens is R8, satisfying the following relationship: 2.40≤(f6-f7) / f1≤3.20; 0.90≤TTL / (f*tan(FOV / 2))≤1.40; 0.30≤R5 / R6≤0.80; -15.0≤(R7+R8) / (R7-R8)≤-1.50 。

[0005] Furthermore, the following relationship is satisfied: 1.10≤TTL / (f*tan(FOV / 2))≤1.40.

[0006] Preferably, the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following relationship is satisfied: -0.60≤f3 / f4≤-0.25.

[0007] Preferably, the on-axis thickness of the first lens is d1, the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2, the on-axis thickness of the second lens is d3, and the following relationship is satisfied: 0.15≤(d1+d2+d3) / TTL≤0.21.

[0008] 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 central curvature radius of the object-side surface of the first lens is R1, the central curvature radius of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the following relationships are satisfied: 0.82≤f1 / f≤0.89; -1.70≤(R1+R2) / (R1-R2)≤-1.24; 0.09≤d1 / TTL≤0.17.

[0009] Preferably, the object side surface of the second lens is convex at the paraxial position, and the image side surface of the second lens is concave at the paraxial position; the focal length of the second lens is f2, the central curvature radius of the object side surface of the second lens is R3, the central curvature radius of the image side surface of the second lens is R4, the axial thickness of the second lens is d3, and the following relationships are satisfied: -3.10≤f2 / f≤-2.00; 2.66≤(R3+R4) / (R3-R4)≤3.07; 0.01≤d3 / TTL≤0.07.

[0010] Preferably, 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; the focal length of the third lens is f3, the axial thickness of the third lens is d5, and the following relationships are satisfied: 3.08≤f3 / f≤12.92; -8.32≤(R5+R6) / (R5-R6)≤-1.84; 0.03≤d5 / TTL≤0.08.

[0011] 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 fourth lens is f4, the axial thickness of the fourth lens is d7, and the following relationship is satisfied: -21.53≤f4 / f≤-7.10; 0.02≤d7 / TTL≤0.07.

[0012] Preferably, the image-side surface of the fifth lens is concave at the paraxial position; the focal length of the fifth lens is f5, the central curvature radius of the object-side surface of the fifth lens is R9, the central curvature radius of the image-side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the following relationships are satisfied: -8.74≤f5 / f≤-3.54; 0.23≤(R9+R10) / (R9-R10)≤2.26; 0.03≤d9 / TTL≤0.09.

[0013] Preferably, the object-side surface of the sixth lens is convex at the paraxial position; the central curvature radius of the object-side surface of the sixth lens is R11, the central curvature radius of the image-side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the following relationships are satisfied: 1.16≤f6 / f≤1.81; -1.27≤(R11+R12) / (R11-R12)≤0.13; 0.07≤d11 / TTL≤0.13.

[0014] Preferably, the object side surface of the seventh lens is convex at the paraxial position, and the image side surface of the seventh lens is concave at the paraxial position; the central curvature radius of the object side surface of the seventh lens is R13, the central curvature radius of the image side surface of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the following relationships are satisfied: -1.01≤f7 / f≤-0.75; 1.12≤(R13+R14) / (R13-R14)≤1.18; 0.05≤d13 / TTL≤0.15. The beneficial effects of the present invention are that the camera optical lens according to the present invention has excellent optical properties, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0016] Figure 1 1 is a schematic structural diagram of a camera optical lens according to a first embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0018] Figure 3 yes Figure 1Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0019] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0020] Figure 5 2 is a schematic structural diagram of a second embodiment of an imaging optical lens according to the present invention;

[0021] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0022] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0023] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0024] Figure 9 2 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0025] Figure 10 yes Figure 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0026] Figure 11 yes Figure 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0027] Figure 12 yes Figure 9 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present invention. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the present invention can still be implemented.

[0029] With reference to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10 , 20 , 30 . Figure 1 、 5Figures 9 and 9 illustrate imaging optical lenses 10, 20, and 30 according to the present invention. These lenses comprise a total of seven lenses. Specifically, from the object side to the image side, the imaging optical lenses comprise: 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 element such as an optical filter GF may be positioned between the seventh lens L7 and the image plane Si.

[0030] The first lens L1 is made of plastic, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic. Each lens may also be made of other materials.

[0031] The focal length of the first lens L1 is defined as f1, the focal length of the sixth lens L6 is defined as f6, and the focal length of the seventh lens L7 is defined as f7, satisfying the following relationship: 2.40≤(f6-f7) / f1≤3.20. By properly allocating the optical focal lengths of the system, the system has better imaging quality and lower sensitivity.

[0032] The total optical length of the entire optical camera lens 10 is defined as TTL, the focal length of the entire optical camera lens 10 is defined as f, and the field of view angle of the entire optical camera lens 10 with a field of view of 1.0 is defined as FOV. The following relationship is satisfied: 0.90 ≤ TTL / (f*tan(FOV / 2)) ≤ 1.40. This helps control the total length of the system when imaging on a large image plane. Preferably, 1.10 ≤ TTL / (f*tan(FOV / 2)) ≤ 1.40 is satisfied.

[0033] The central curvature radius of the object side of the third lens L3 is defined as R5, and the central curvature radius of the image side of the third lens L3 is defined as R6, satisfying the following relationship: 0.30≤R5 / R6≤0.80. Reasonable control of the surface shape of the third lens is beneficial to reducing the sensitivity of the system and improving the manufacturing yield by reducing the molding difficulty. It can also reduce the stray light generated by the lens and improve the lens imaging quality.

[0034] The central curvature radius of the object-side surface of the fourth lens L4 is defined as R7, and the central curvature radius of the image-side surface of the fourth lens L4 is defined as R8, satisfying the following relationship: -15.00≤(R7+R8) / (R7-R8)≤-1.50. Reasonable control of the surface shape of the fourth lens can effectively balance the field curvature of the system, making the field curvature offset of the central field of view less than 0.02mm.

[0035] The focal length of the third lens L3 is defined as f3, and the focal length of the fourth lens L4 is defined as f4, satisfying the following relationship: -0.60≤f3 / f4≤-0.25. By reasonably allocating the focal lengths of adjacent lenses L3 and L4, a smooth transition of incident light is achieved, resulting in a system with better imaging quality and lower sensitivity.

[0036] The on-axis thickness of the first lens element is defined as d1, the on-axis distance from the image side of the first lens element to the object side of the second lens element is d2, and the on-axis thickness of the second lens element is d3. The following relationship is satisfied: 0.15≤(d1+d2+d3) / TTL≤0.21. This specifies the ratio of the on-axis distance from the object side of the first lens element L1 to the image side of the second lens element L2 to the total length of the system. This rationally allocates the proportion of lens thickness, facilitates a smooth transition of incident light, and effectively shortens the total optical length to achieve miniaturization.

[0037] When the above conditions are met, the camera optical lenses 10, 20, and 30 have good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thinness; according to the characteristics of the camera optical lenses 10, 20, and 30, the camera optical lenses 10, 20, and 30 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0038] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0039] The object-side surface of the first lens L1 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The first lens L1 has positive refractive power. The object-side surface and the image-side surface of the first lens L1 can also be set to other concave and convex distributions.

[0040] The focal length of the first lens L1 is f1, and the focal length of the entire optical camera lens 10 is f, which satisfies the following relationship: 0.82≤f1 / f≤0.89. Within the specified range, the first lens has appropriate positive refractive power, which is beneficial to reducing system aberrations and is also conducive to the development of ultra-thin and wide-angle lenses.

[0041] The central curvature radius R1 of the object side surface of the first lens L1 and the central curvature radius R2 of the image side surface of the first lens L1 satisfy the following relationship: -1.70≤(R1+R2) / (R1-R2)≤-1.24. The shape of the first lens is reasonably controlled so that the first lens can effectively correct the system spherical aberration.

[0042] The axial thickness of the first lens L1 is d1, and the total optical length of the entire optical camera lens 10 is TTL, which satisfies the following relationship: 0.09≤d1 / TTL≤0.17, which is conducive to achieving ultra-thinness.

[0043] The object-side surface of the second lens L2 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The second lens L2 has negative refractive power. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0044] The focal length of the second lens L2 is f2, and the focal length of the entire optical camera lens 10 is f, which satisfies the following relationship: -3.10≤f2 / f≤-2.00. By controlling the negative focal length of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system.

[0045] The central curvature radius R3 of the object-side surface of the second lens L2 and the central curvature radius R4 of the image-side surface of the second lens L2 satisfy the following relationship: 2.66≤(R3+R4) / (R3-R4)≤3.07, which specifies 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 axial chromatic aberration problems.

[0046] The axial thickness of the second lens L2 is d3, and the total optical length of the entire optical camera lens 10 is TTL, which satisfies the following relationship: 0.01≤d3 / TTL≤0.07, which is conducive to achieving ultra-thinness.

[0047] The object-side surface of the third lens L3 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. 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.

[0048] The focal length of the third lens L3 is f3, and the focal length of the entire optical camera lens 10 is f, which satisfies the following relationship: 3.08≤f3 / f≤12.92. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0049] The central radius of curvature R5 of the object-side surface of the third lens L3 and the central radius of curvature R6 of the image-side surface of the third lens L3 satisfy the following relationship: -8.32≤(R5+R6) / (R5-R6)≤-1.84. This effectively controls the shape of the third lens L3 and facilitates the molding of the third lens L3. Within the range specified by the conditional expression, the degree of light deflection passing through the lens can be alleviated, effectively reducing aberrations.

[0050] The axial thickness of the third lens L3 is d5, and the total optical length of the entire optical camera lens 10 is TTL, which satisfies the following relationship: 0.03≤d5 / TTL≤0.08, which is conducive to achieving ultra-thinness.

[0051] The object-side surface of the fourth lens element L4 is concave at the paraxial direction, and the image-side surface is convex at the paraxial direction. The fourth lens element L4 has negative refractive power. The object-side and image-side surfaces of the fourth lens element L4 can also be configured with other concave and convex distributions.

[0052] The focal length of the fourth lens L4 is f4, and the focal length of the entire optical camera lens 10 is f, which satisfies the following relationship: -21.53≤f4 / f≤-7.10. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0053] The axial thickness of the fourth lens L4 is d7, and the total optical length of the entire optical camera lens 10 is TTL, which satisfies the following relationship: 0.02≤d7 / TTL≤0.07, which is conducive to achieving ultra-thinness.

[0054] The object-side surface of the fifth lens element L5 is convex or concave at the paraxial direction, and the image-side surface is concave at the paraxial direction. The fifth lens element L5 has negative refractive power. The object-side and image-side surfaces of the fifth lens element L5 can also be configured with other concave or convex distributions.

[0055] The focal length of the fifth lens L5 is f5, and the focal length of the entire optical camera lens 10 is f, which satisfies the following relationship: -8.74≤f5 / f≤-3.54. The limitation of the fifth lens L5 can effectively make the light angle of the camera lens smooth and reduce tolerance sensitivity.

[0056] The central curvature radius R9 of the object side surface of the fifth lens L5 and the central curvature radius R10 of the image side surface of the fifth lens L5 satisfy the following relationship: 0.23≤(R9+R10) / (R9-R10)≤2.26, which specifies the shape of the fifth lens L5. When within the conditions, as ultra-thin and wide-angle lenses develop, it is beneficial to correct aberrations of off-axis angles and other problems.

[0057] The axial thickness of the fifth lens L5 is d9, and the total optical length of the entire optical camera lens 10 is TTL, which satisfies the following relationship: 0.03≤d9 / TTL≤0.09, which is conducive to achieving ultra-thinness.

[0058] The object-side surface of the sixth lens element L6 is convex at the paraxial direction, and the image-side surface is convex or concave at the paraxial direction. The sixth lens element L6 has positive refractive power. The object-side and image-side surfaces of the sixth lens element L6 can also be configured with other concave or convex distributions.

[0059] The focal length of the sixth lens L6 is f6, and the focal length of the entire optical camera lens 10 is f, which satisfies the following relationship: 1.16≤f6 / f≤1.81. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0060] The central curvature radius R11 of the object-side surface of the sixth lens L6 and the central curvature radius R12 of the image-side surface of the sixth lens L6 satisfy the following relationship: -1.27≤(R11+R12) / (R11-R12)≤0.13. This specifies the shape of the sixth lens L6. Within the conditions, as ultra-thin and wide-angle lenses develop, it is beneficial to correct aberrations of off-axis angles and other problems.

[0061] The axial thickness of the sixth lens L6 is d11, and the total optical length of the entire optical camera lens 10 is TTL, which satisfies the following relationship: 0.07≤d11 / TTL≤0.13, which is conducive to achieving ultra-thinness.

[0062] The object-side surface of the seventh lens L7 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The seventh lens L7 has negative refractive power. The object-side surface and image-side surface of the seventh lens L7 can also be set to other concave and convex distributions.

[0063] The focal length of the seventh lens L7 is f7, and the focal length of the entire optical camera lens 10 is f, which satisfies the following relationship: -1.01≤f7 / f≤-0.75. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0064] The central radius of curvature R13 of the object side surface of the seventh lens L7 and the central radius of curvature R14 of the image side surface of the seventh lens L7 satisfy the following relationship: 1.12≤(R13+R14) / (R13-R14)≤1.18. This specifies the shape of the seventh lens L7. Within this conditional range, as ultra-thin and wide-angle lenses develop, it is beneficial to correct aberrations and other problems at off-axis angles.

[0065] The axial thickness of the seventh lens L7 is d13, and the total optical length of the entire optical camera lens 10 is TTL, which satisfies the following relationship: 0.05≤d13 / TTL≤0.15, which is conducive to achieving ultra-thinness.

[0066] The image height of 1.0 field of view of the camera optical lenses 10 , 20 , and 30 is IH, the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 1.10≤TTL / IH≤1.25, which is conducive to achieving ultra-thinness.

[0067] The field of view angle FOV of the 1.0 field of view of the camera optical lenses 10, 20, and 30 satisfies 80°≤FOV≤85.60°, thereby achieving a wide angle.

[0068] The aperture value FNO of the camera optical lenses 10, 20, and 30 satisfies 1.87≤FNO≤1.90, thereby achieving a large aperture and good imaging performance of the camera optical lenses.

[0069] The following examples illustrate the imaging optical lens of the present invention. The symbols used in each example are as follows: focal length, on-axis distance, radius of curvature, center radius of curvature, and on-axis thickness are in units of mm.

[0070] TTL: total optical length (the on-axis distance from the object side of the first lens L1 to the image surface Si), in mm;

[0071] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0072] 1.0 Image height of field of view IH: the height of the field of view corresponding to the effective pixel of the sensor (that is, half of the diagonal length of the effective pixel area of ​​the sensor);

[0073] 1.0 Field of view FOV: the field of view angle corresponding to the effective pixels of the sensor;

[0074] Preferably, an inflection point and / or a stagnation point may be provided on the object side and / or image side of the lens to meet high-quality imaging requirements.

[0075] Next, the technical solution of the present invention will be specifically described with three embodiments. If the scope of the above conditional formula is exceeded, the technical effect of the present invention cannot be achieved.

[0076] (First embodiment)

[0077] Tables 1 and 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0078]

Table 1

[0079]

[0080] The meanings of the symbols are as follows.

[0081] S1: aperture;

[0082] R: The radius of curvature at the center of the optical surface, the central radius of curvature of the object side or image side of the lens;

[0083] R1: the central curvature radius of the object side of the first lens L1;

[0084] R2: the central curvature radius of the image-side surface of the first lens L1;

[0085] R3: the central curvature radius of the object-side surface of the second lens L2;

[0086] R4: the central curvature radius of the image-side surface of the second lens L2;

[0087] R5: central radius of curvature of the object side surface of the third lens L3;

[0088] R6: central curvature radius of the image-side surface of the third lens L3;

[0089] R7: central curvature radius of the object side surface of the fourth lens L4;

[0090] R8: central curvature radius of the image-side surface of the fourth lens L4;

[0091] R9: the central radius of curvature of the object side surface of the fifth lens L5;

[0092] R10: central curvature radius of the image-side surface of the fifth lens L5;

[0093] R11: central curvature radius of the object-side surface of the sixth lens L6;

[0094] R12: central curvature radius of the image-side surface of the sixth lens L6;

[0095] R13: central radius of curvature of the object side surface of the seventh lens L7;

[0096] R14: central curvature radius of the image-side surface of the seventh lens L7;

[0097] R15: radius of curvature of the object side of the optical filter GF;

[0098] R16: radius of curvature of the image side of the optical filter GF;

[0099] d: the on-axis thickness of the lens and the on-axis distance between lenses;

[0100] d0: the on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0101] d1: axial thickness of the first lens L1;

[0102] 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;

[0103] d3: axial thickness of the second lens L2;

[0104] d4: the on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0105] d5: axial thickness of the third lens L3;

[0106] 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;

[0107] d7: axial thickness of the fourth lens L4;

[0108] 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;

[0109] d9: axial thickness of the fifth lens L5;

[0110] d10: the on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0111] d11: axial thickness of sixth lens L6;

[0112] d12: the on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0113] d13: axial thickness of seventh lens L7;

[0114] d14: the on-axis distance between the image-side surface of the seventh lens L7 and the object-side surface of the optical filter GF;

[0115] d15: axial thickness of the optical filter GF;

[0116] d16: the axial distance from the image side of the optical filter GF to the image plane Si;

[0117] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0118] nd1: the refractive index of the first lens L1 at the d-line;

[0119] nd2: the refractive index of the second lens L2 at the d-line;

[0120] nd3: the refractive index of the third lens L3 at the d-line;

[0121] nd4: the refractive index of the fourth lens L4 at the d-line;

[0122] nd5: the refractive index of the fifth lens L5 at the d-line;

[0123] nd6: the refractive index of the sixth lens L6 at the d-line;

[0124] nd7: the refractive index of the seventh lens L7 at the d-line;

[0125] ndg: refractive index of the d-line of the optical filter GF;

[0126] vd: Abbe number;

[0127] v1: Abbe number of the first lens L1;

[0128] v2: Abbe number of the second lens L2;

[0129] v3: Abbe number of the third lens L3;

[0130] v4: Abbe number of the fourth lens L4;

[0131] v5: Abbe number of the fifth lens L5;

[0132] v6: Abbe number of sixth lens L6;

[0133] v7: Abbe number of seventh lens L7;

[0134] vg: Abbe number of the optical filter GF.

[0135] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0136]

Table 2

[0137]

[0138]

[0139] For convenience, the aspheric surface of each lens surface is represented by the aspheric surface shown in the following formula (1). However, the present invention is not limited to the aspheric surface polynomial form represented by the formula (1).

[0140] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0141] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0142] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and the tangent plane tangent to the vertex on the aspheric axis).

[0143] Figure 2 、 Figure 3Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively. Figure 4 FIG1 shows a schematic diagram of field curvature and distortion of light having a wavelength of 546 nm after passing through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0144] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 3.313 mm, the image height IH of 1.0 field of view is 6.000 mm, and the field of view angle FOV of 1.0 field of view is 85.45°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0145] (Second embodiment)

[0146] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0147] Different from the first embodiment, the image-side surface of the sixth lens L6 is a convex surface at the paraxial position.

[0148] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0149] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0150]

Table 3

[0151]

[0152] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0153]

Table 4

[0154]

[0155] Figure 6 、 Figure 7 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging 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.

[0156] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 3.172 mm, the image height IH of 1.0 field of view is 6.000 mm, and the field of view angle FOV of 1.0 field of view is 80.21°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0157] (Third embodiment)

[0158] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0159] The difference from the first embodiment is that the object-side surface of the fifth lens L5 is concave at the paraxial position.

[0160] Figure 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

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

[0162]

Table 5

[0163]

[0164]

[0165] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0166]

Table 6

[0167]

[0168]

[0169] Figure 10 、 Figure 11 Schematic diagrams respectively show the axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 30 of the third embodiment. Figure 12 FIG. 3 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 546 nm 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.

[0170] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.234 mm, the image height IH of the 1.0 field of view is 6.000 mm, and the field of view angle FOV of the 1.0 field of view is 81.69°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0171] Table 7 that follows shows the values ​​corresponding to the various numerical values ​​in each of the first, second, and third embodiments and the parameters specified in the conditional expressions.

[0172]

Table 7

[0173]

[0174]

[0175] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A camera optical lens, characterized in that: The camera optical lens comprises a total of seven lenses, and the seven lenses are, in order from the object side to the image side: a first lens 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; wherein the object-side surface of the first lens is convex at the paraxial position, the image-side surface of the first lens is concave at the paraxial position, the object-side surface of the second lens is convex at the paraxial position, the image-side surface of the second lens is concave at the paraxial position, the object-side surface of the third lens is convex at the paraxial position, the image-side surface of the third lens is concave at the paraxial position, the object-side surface of the fourth lens is concave at the paraxial position, the image-side surface of the fourth lens is convex at the paraxial position, the image-side surface of the fifth lens is concave at the paraxial position, the object-side surface of the sixth lens is convex at the paraxial position, the object-side surface of the seventh lens is convex at the paraxial position, and the image-side surface of the seventh lens is concave at the paraxial position; The focal length of the optical camera lens is f, the total optical length of the optical camera lens is TTL, the field of view angle of 1.0 field of view of the optical camera lens is FOV, the focal length of the first lens is f1, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side of the third lens is R6, the central curvature radius of the object side of the fourth lens is R7, and the central curvature radius of the image side of the fourth lens is R8, and the following relationship is satisfied: 2.40≤(f6-f7) / f1≤3.20; 0.90≤TTL / (f*tan(FOV / 2))≤1.40; 0.30≤R5 / R6≤0.80; -15.0≤(R7+R8) / (R7-R8)≤-1.

50.

2. The imaging optical lens according to claim 1, wherein: The focal length of the third lens is f3, the focal length of the fourth lens is f4, and the following relationship is satisfied: -0.60≤f3 / f4≤-0.

25.

3. The imaging optical lens according to claim 1, wherein: The on-axis thickness of the first lens is d1, the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2, and the on-axis thickness of the second lens is d3, and the following relationship is satisfied: 0.15≤(d1+d2+d3) / TTL≤0.

21.

4. The imaging optical lens according to claim 1, wherein: The central curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, the axial thickness of the first lens is d1, and the following relationship is satisfied: 0.82≤f1 / f≤0.89; -1.70≤(R1+R2) / (R1-R2)≤-1.24; 0.09≤d1 / TTL≤0.

17.

5. The imaging optical lens according to claim 1, wherein The focal length of the second lens is f2, the central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, the axial thickness of the second lens is d3, and the following relationship is satisfied: -3.10≤f2 / f≤-2.00; 2.66≤(R3+R4) / (R3-R4)≤3.07; 0.01≤d3 / TTL≤0.

07.

6. The imaging optical lens according to claim 1, wherein: The focal length of the third lens is f3, the axial thickness of the third lens is d5, and the following relationship is satisfied: 3.08≤f3 / f≤12.92; -8.32≤(R5+R6) / (R5-R6)≤-1.84; 0.03≤d5 / TTL≤0.

08.

7. The imaging optical lens according to claim 1, wherein: The focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, and the following relationship is satisfied: -21.53≤f4 / f≤-7.10; 0.02≤d7 / TTL≤0.

07.

8. The imaging optical lens according to claim 1, wherein: The focal length of the fifth lens is f5, the central curvature radius of the object side of the fifth lens is R9, the central curvature radius of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the following relationship is satisfied: -8.74≤f5 / f≤-3.54; 0.23≤(R9+R10) / (R9-R10)≤2.26; 0.03≤d9 / TTL≤0.

09.

9. The imaging optical lens according to claim 1, wherein: The central curvature radius of the object side surface of the sixth lens is R11, the central curvature radius of the image side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the following relationship is satisfied: 1.16≤f6 / f≤1.81; -1.27≤(R11+R12) / (R11-R12)≤0.13; 0.07≤d11 / TTL≤0.

13.

10. The imaging optical lens according to claim 1, wherein: The central curvature radius of the object side of the seventh lens is R13, the central curvature radius of the image side of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the following relationship is satisfied: -1.01≤f7 / f≤-0.75; 1.12≤(R13+R14) / (R13-R14)≤1.18; 0.05≤d13 / TTL≤0.

15.

11. The imaging optical lens according to claim 1, wherein: The following relationship is satisfied: 1.10≤TTL / (f*tan(FOV / 2))≤1.40.

Images