Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which comprises seven lenses which are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side. The center curvature radius of the object side face of the third lens is R5, the center curvature radius of the image side face of the third lens is R6, the center curvature radius of the object side face of the fifth lens is R9, the center curvature radius of the image side face of the fifth lens is R10, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7. The axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, the axial distance from the image side surface of the sixth lens to the object side surface of the seventh lens is d12, the Abbe number of the first lens is v1, the Abbe number of the second lens is v2, and the following relational expressions are met: 1.10 < = R9 / R10 < = 1.90; 1.50 < = (R5 + R6) / (R5-R6) < = 2.80; (f6-f7) / d12 is greater than or equal to 17.00 and less than or equal to 20.00; 0.17 < = (v1-v2) * d2 / (f1-f2) < = 0.32.

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 technology]

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

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

[0004] To achieve the above object, an embodiment of the present invention provides a camera optical lens, the camera optical lens comprises seven lenses in total, the seven lenses are, from the object side to the image side, in order: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive 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 central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the 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 focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, the axial distance from the image side surface of the sixth lens to the object side surface of the seventh lens is d12, the Abbe number of the first lens is v1, and the Abbe number of the second lens is v2, satisfying the following relationship:

[0006] 1.10≤R9 / R10≤1.90;

[0007] 1.50≤(R5+R6) / (R5-R6)≤2.80;

[0008] 17.00≤(f6-f7) / d12≤20.00;

[0009] 0.17≤(v1-v2)*d2 / (f1-f2)≤0.32.

[0010] Preferably, the central curvature radius of the object side of the sixth lens is R11, the central curvature radius of the object side of the sixth lens is R12, the focal length of the sixth lens is f6, and the following relationship is satisfied:

[0011] 1.2≤(R11+R12) / f6≤2.05.

[0012] Preferably, the focal length of the camera optical lens is f, and the combined focal length of the first lens, the second lens, the third lens and the fourth lens is f1234, and satisfies the following relationship:

[0013] 1.25≤f1234 / f≤1.40.

[0014] 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;

[0015] The focal length of the camera optical lens is f, the central curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, the axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0016] 1.12≤f1 / f≤1.18;

[0017] -1.97≤(R1+R2) / (R1-R2)≤-1.93;

[0018] 0.13≤d1 / TTL≤0.14.

[0019] 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;

[0020] The focal length of the camera optical lens is f, the central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0021] -9.24≤f2 / f≤-5.96;

[0022] 7.14≤(R3+R4) / (R3-R4)≤10.82;

[0023] 0.03≤d3 / TTL≤0.04.

[0024] 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;

[0025] The focal length of the camera optical lens is f, the focal length of the third lens is f3, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0026] -4.41≤f3 / f≤-3.07;

[0027] 0.03≤d5 / TTL≤0.04.

[0028] Preferably, the object side surface of the fourth lens is a convex surface at the paraxial position, and the image side surface of the fourth lens is a convex surface at the paraxial position;

[0029] The focal length of the camera optical lens is f, the focal length of the fourth lens is f4, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, and the following relationship is satisfied:

[0030] 3.39≤f4 / f≤4.01;

[0031] -0.91≤(R7+R8) / (R7-R8)≤-0.59.

[0032] Preferably, the object side surface of the fifth lens is convex at the paraxial position, and the image side surface of the fifth lens is concave at the paraxial position;

[0033] The focal length of the camera optical lens is f, the focal length of the fifth lens is f5, and the following relationship is satisfied:

[0034] -50.60≤f5 / f≤-7.82;

[0035] 3.24≤(R9+R10) / (R9-R10)≤20.56.

[0036] Preferably, the object side surface of the sixth lens is convex at the paraxial position, and the image side surface of the sixth lens is concave at the paraxial position;

[0037] The focal length of the camera optical lens is f, the central curvature radius of the object side of the sixth lens is R11, the central curvature radius of the image side of the sixth lens is R12, the axial thickness of the fifth lens is d11, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0038] 1.03≤f6 / f≤1.21;

[0039] -2.34≤(R11+R12) / (R11-R12)≤-1.68;

[0040] 0.06≤d11 / TTL≤0.08.

[0041] 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;

[0042] The focal length of the camera optical lens is f, 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, and the following relationship is satisfied:

[0043] -0.89≤f7 / f≤-0.86;

[0044] 1.99≤(R13+R14) / (R13-R14)≤2.07.

[0045] Preferably, the first lens is made of glass.

[0046] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical properties, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

Brief Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0048] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0049] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0050] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0051] Figure 4 yes Figure 1Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0052] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0053] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0054] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0055] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0056] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0057] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0058] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0059] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0060] Fig.13 is a schematic structural diagram of a camera optical lens according to a fourth embodiment of the present invention;

[0061] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0062] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0063] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0064] Fig.17 is a schematic structural diagram of an imaging optical lens according to a fifth embodiment of the present invention;

[0065] Fig.18 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0066] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0067] Fig. 20 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0068] Fig.21 Schematic diagram of the structure of the camera optical lens of the comparative example of the present invention;

[0069] Fig. 22 yes Fig.21 Schematic diagram of axial aberration of the camera optical lens shown;

[0070] Fig.23 yes Fig.21 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0071] Fig.24 yes Fig.21 Schematic diagram of field curvature and distortion of the camera optical lens shown. [Specific implementation method]

[0072] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0073] With reference to the accompanying drawings, the present invention provides an imaging optical lens 10 , 20 , 30 , 40 , 50 . Figure 1 , 5 , 9, 13, and 17 show the first embodiment of the imaging optical lens 10, 20, 30, 40, and 50 of the present invention, and the imaging optical lens 10, 20, 30, 40, and 50 include seven lenses. Specifically, the imaging optical lens 10 includes, from the object side to the image side, an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as an optical filter GF may be provided between the seventh lens L7 and the image plane Si.

[0074] The first lens L1 is made of plastic or glass, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic. Each lens may also be made of other materials.

[0075] The central curvature radius of the object side surface of the fifth lens L5 is defined as R9, the central curvature radius of the image side surface of the fifth lens L5 is defined as R10, and 1.10≤R9 / R10≤1.90. This specifies the shape of the fifth lens L5, which is beneficial to alleviating the degree of deflection of light passing through the lens within the conditional range and can effectively reduce aberrations.

[0076] The central curvature radius of the object side surface of the third lens L3 is defined as R5, the central curvature radius of the image side surface of the third lens L3 is defined as R6, 1.50≤(R5+R6) / (R5-R6)≤2.80, which specifies the shape of the third lens L3, which is beneficial to correcting the astigmatism and distortion of the camera lens, making the distortion |Distortion|≤3%, and reducing the possibility of vignetting.

[0077] The focal length of the sixth lens L6 is defined as f6, the focal length of the seventh lens L7 is defined as f7, the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7 is defined as d12, and 17.00≤(f6-f7) / d12≤20.00. While controlling the spacing distance between the image side surface of the sixth lens L6 and the object side surface of the seventh lens L7 along the optical axis direction, the thickness of the structural part of the seventh lens L7 along the optical axis direction is also controlled, and the spacing position can ensure a smooth transition of the effective diameter edge of the seventh lens L7, ensure that the lens surface does not have problems such as bifurcation, and avoid affecting the imaging effect; at the same time, the effective focal lengths of the two lenses are allocated, so as to control the amount of light entering the structural part of the seventh lens L7, and the thickness of the structural part can control the propagation direction and the number of reflections of the light inside the lens, thereby controlling stray light, reducing stray light imaging, and improving shooting quality.

[0078] Define the Abbe number of the first lens L1 as v1, the Abbe number of the second lens L2 as v2, the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2 as d2, the focal length of the first lens L1 as f1, the focal length of the second lens L2 as f2, 0.17≤(v1-v2)*d2 / (f1-f2)≤0.32, limit the conditional expression within a reasonable range, the size distribution of the structural parts of the first lens L1 and the second lens L2 along the optical axis direction is more reasonable, and under the condition that the lens can be formed, the smaller the size of the structural part of the lens along the optical axis direction is, the less stray light paths are; at the same time, the chromatic aberration coefficients of the first lens L1 and the second lens L2 are controlled to improve the imaging quality of the lens group, and the smaller the ratio of (v1-v2)*d2 / (f1-f2), the higher the imaging quality of the lens group.

[0079] Define the central curvature radius of the object side surface of the sixth lens L6 as R11, the central curvature radius of the object side surface of the sixth lens L6 as R12, the focal length of the sixth lens L6 as f6, and satisfy the following relationship: 1.2≤(R11+R12) / f6≤2.05. The conditional expression can reasonably control the surface shape of the sixth lens L6, help reduce the system sensitivity, and also can reduce the stray light generated by the lens, thereby improving the imaging quality of the lens.

[0080] The focal length of the camera optical lens 10 is defined as f, and the combined focal length of the first lens L1, the second lens L2, the third lens L3 and the fourth lens L4 is f1234, and the following relationship is satisfied: 1.25≤f1234 / f≤1.40. By reasonably allocating the optical focal length of the system, the system has better imaging quality and lower sensitivity.

[0081] When the above conditions are met, the camera optical lenses 10, 20, 30, 40, 50 can have good optical performance, can meet the design requirements of large aperture, wide angle, and ultra-thinness, and have the characteristics of low distortion and high imaging quality; according to the characteristics of the camera optical lenses 10, 20, 30, 40, 50, the camera optical lenses 10, 20, 30, 40, 50 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0082] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0083] The object side surface of the first lens L1 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the first lens L1 has positive refractive power. The object side surface and the image side surface of the first lens L1 can also be set to other concave and convex distributions.

[0084] The focal length of the camera optical lens is f, the focal length of the first lens L1 is f1, and the following relationship is satisfied: 1.12≤f1 / f≤1.18, which specifies the ratio of the positive refractive power of the first lens L1 to the overall focal length. Within the specified range, the first lens has an appropriate positive refractive power, which is beneficial to reducing system aberrations and is also beneficial to the development of ultra-thin and wide-angle lenses.

[0085] The central curvature radius of the object side surface of the first lens L1 is R1, and the central curvature radius of the image side surface of the first lens L1 is defined as R2, and the following relationship is satisfied: -1.97≤(R1+R2) / (R1-R2)≤-1.93. The shape of the first lens L1 is reasonably controlled so that the first lens L1 can effectively correct the system spherical aberration.

[0086] The axial thickness of the first lens L1 is d1, the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.13≤d1 / TTL≤0.14. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0087] The object side surface of the second lens L2 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the second lens L2 has negative refractive power. The object side surface and the image side surface of the second lens L2 can also be set to other concave and convex distributions.

[0088] The focal length of the second lens L2 is f2, and satisfies the following relationship: -9.24≤f2 / f≤-5.96. By controlling the positive refractive power of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system.

[0089] The central curvature radius of the object side surface of the second lens L2 is R3, the central curvature radius of the image side surface of the second lens L2 is R4, and the following relationship is satisfied: 7.14≤(R3+R4) / (R3-R4)≤10.82, which specifies the shape of the second lens L2. When within the range, as the lens develops towards ultra-thin and wide-angle, it is beneficial to correct the axial chromatic aberration problem.

[0090] The axial thickness of the second lens L2 is d3, 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 conditional expression, it is conducive to achieving ultra-thinness.

[0091] The object side surface of the third lens L3 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the third lens L3 has negative refractive power. The object side surface and the image side surface of the third lens L3 can also be set to other concave and convex distributions.

[0092] The focal length of the third lens L3 is f3, and satisfies the following relationship: -4.41≤f3 / f≤-3.07. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0093] The axial thickness of the third lens L3 is d5, the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: 0.03≤d5 / TTL≤0.04. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0094] The object side surface of the fourth lens L4 is convex at the paraxial position, and the image side surface is convex at the paraxial position, and the fourth lens L4 has positive refractive power. The object side surface and the image side surface of the fourth lens L4 can also be set to other concave and convex distributions.

[0095] The focal length of the fourth lens L4 is f4, and satisfies the following relationship: 3.39≤f4 / f≤4.01. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0096] The central curvature radius of the object side surface of the fourth lens L4 is R7, the central curvature radius of the image side surface of the fourth lens L4 is R8, and the following relationship is satisfied: -0.91≤(R7+R8) / (R7-R8)≤-0.59, which specifies the shape of the fourth lens L4. When it is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0097] The object side surface of the fifth lens L5 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the fifth lens L5 has negative refractive power. The object side surface and the image side surface of the fifth lens L5 can also be set to other concave and convex distributions.

[0098] The focal length of the fifth lens L5 is f5, and satisfies the following relationship: -50.60≤f5 / f≤-7.82. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0099] The central curvature radius of the object side surface of the fifth lens L5 is R9, the central curvature radius of the image side surface of the fifth lens L5 is R10, and the following relationship is satisfied: 3.24≤(R9+R10) / (R9-R10)≤20.56, which specifies the shape of the fifth lens L5. When within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0100] The object side surface of the sixth lens L6 is convex at the near axis, and the image side surface is concave at the near axis, and the sixth lens L6 has positive refractive power. The object side surface and the image side surface of the sixth lens L6 can also be set to other concave and convex distributions.

[0101] The focal length of the sixth lens L6 is f6, and satisfies the following relationship: 1.03≤f6 / f≤1.21. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0102] The central curvature radius of the object side surface of the sixth lens L6 is R11, the central curvature radius of the image side surface of the sixth lens L6 is R12, and the following relationship is satisfied: -2.34≤(R11+R12) / (R11-R12)≤-1.68, which specifies the shape of the sixth lens L6. When within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0103] The axial thickness of the sixth lens L6 is d11, and satisfies the following relationship: 0.06≤d11 / TTL≤0.08. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0104] The object side surface of the seventh lens L7 is convex at the near axis, and the image side surface is concave at the near axis, and the seventh lens L7 has negative refractive power. The object side surface and the image side surface of the seventh lens L7 can also be set to other concave and convex distributions.

[0105] The focal length of the seventh lens L7 is f7, and satisfies the following relationship: -0.89≤f7 / f≤-0.86. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0106] The central curvature radius of the object side surface of the seventh lens L7 is R13, the central curvature radius of the image side surface of the seventh lens is R14, and the following relationship is satisfied: 1.99≤(R13+R14) / (R13-R14)≤2.07, which specifies the shape of the seventh lens L7. When within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of off-axis picture angles and other problems.

[0107] The following examples are used to illustrate the camera optical lens of the present invention. The symbols recorded in each example are as follows. The focal length, on-axis distance, central curvature radius, on-axis thickness, inflection point position, and stationary point position are in units of mm.

[0108] TTL: total optical length (the axial distance from the object side of the first lens L1 to the image surface Si), in mm;

[0109] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0110] 1.0 Image height IH of the field of view: 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);

[0111] 1.0 Field of view FOV: the field of view angle corresponding to the effective pixels of the sensor;

[0112] Image height IHm of MIC field of view: the field of view height expanded beyond 1.0 to prevent assembly deviation;

[0113] FOVm: the field of view angle corresponding to the image height of the MIC field of view;

[0114] Preferably, an inflection point and / or a stagnation point may be provided on the object side and / or the image side of the lens to meet high-quality imaging requirements.

[0115] Next, the technical solution of the present invention is specifically described with five implementation modes. At the same time, a comparative implementation mode is provided as a reference. When the scope of the above conditional formula is exceeded, the technical effect of the present invention cannot be achieved.

[0116] (First Embodiment)

[0117] Table 1 shows design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0118]

Table 1

[0119]

[0120]

[0121] The meaning of each symbol is as follows.

[0122] S1: aperture;

[0123] R: the central radius of curvature of the optical surface;

[0124] R1: the central curvature radius of the object side surface of the first lens L1; R2: the central curvature radius of the image side surface of the first lens L1; R3: the central curvature radius of the object side surface of the second lens L2; ​​R4: the central curvature radius of the image side surface of the second lens L2; ​​R5: the central curvature radius of the object side surface of the third lens L3; R6: the central curvature radius of the image side surface of the third lens L3; R7: the central curvature radius of the object side surface of the fourth lens L4; R8: the central curvature radius of the image side surface of the fourth lens L4; R9: the central curvature radius of the object side surface of the fifth lens L5; R10: the central curvature radius of the image side surface of the fifth lens L5; R11: the central curvature radius of the object side surface of the sixth lens L6;

[0125] R12: central curvature radius of the image side surface of the sixth lens L6;

[0126] R13: central curvature radius of the object side surface of the seventh lens L7;

[0127] R14: central curvature radius of the image side surface of the seventh lens L7;

[0128] R15: radius of curvature of the object side of the optical filter GF;

[0129] R16: radius of curvature of the image side of the optical filter GF;

[0130] d: the on-axis thickness of the lens and the on-axis distance between the lenses;

[0131] d0: the axial distance from the aperture S1 to the object side of the first lens L1;

[0132] d1: axial thickness of the first lens L1;

[0133] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0134] d3: axial 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: axial thickness of the third lens L3;

[0137] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0138] d7: axial thickness of the fourth lens L4;

[0139] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0140] d9: axial 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: axial thickness of the sixth lens L6;

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

[0144] d13: axial 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: axial thickness of the optical filter GF;

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

[0148] nd: refractive index of d-line;

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

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

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

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

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

[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: 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 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 aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0167]

Table 2

[0168]

[0169]

Table 3

[0170]

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

[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 +A26r26 +A28r 28 +A30r 30 (1)

[0174] Where, k is the cone coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the vertical distance between the point on the aspheric curve and the optical axis, and z is the aspheric depth (the vertical distance between the point on the aspheric surface that is r away from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis).

[0175] Figure 2 , Figure 3 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively.

[0176] Figure 4 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 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.

[0177] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 5.136 mm, the image height IH of 1.0 field of view is 8.000 mm, the field angle FOV of 1.0 field of view is 84.88°, the image height IHm of the MIC field of view is 8.17 mm, and the field angle FOVm of the MIC field of view is 86.52°. 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.

[0178] (Second Embodiment)

[0179] The second embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment. Only the differences are listed below.

[0180] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0181] Table 4 shows design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0182]

Table 4

[0183]

[0184]

[0185] Tables 5 and 6 show aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0186]

Table 5

[0187]

[0188]

Table 6

[0189]

[0190]

[0191] Figure 6 , Figure 7 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nm after passing through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0192] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 5.181 mm, the image height IH of 1.0 field of view is 8.003 mm, the field angle FOV of 1.0 field of view is 84.38°, the image height IHm of the MIC field of view is 8.177 mm, and the field angle FOVm of the MIC field of view is 85.77°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0193] (Third Embodiment)

[0194] The third embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0195] Fig. 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0196] Table 7 shows design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0197]

Table 7

[0198]

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

[0200]

Table 8

[0201]

[0202]

[0203]

Table 9

[0204]

[0205] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively. Fig.12 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nm after passing through the camera optical lens 30 of the third embodiment. Fig.12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0206] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 5.043mm, the image height IH of 1.0 field of view is 8.000mm, the field angle FOV of 1.0 field of view is 85.82°, the image height IHm of the MIC field of view is 8.200mm, and the field angle FOVm of the MIC field of view is 87.24°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0207] (Fourth Embodiment)

[0208] The fourth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0209] Fig.13 FIG. 4 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0210] Table 10 shows design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0211]

Table 10

[0212]

[0213] Tables 11 and 12 show aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0214]

Table 11

[0215]

[0216]

Table 12

[0217]

[0218]

[0219] Fig.14 , Fig.15 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Fig.16 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nm after passing through the camera optical lens 40 of the fourth embodiment. Fig.16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0220] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 5.146 mm, the image height IH of 1.0 field of view is 8.000 mm, the field angle FOV of 1.0 field of view is 84.91°, the image height IHm of the MIC field of view is 8.170 mm, and the field angle FOVm of the MIC field of view is 86.15°. The camera optical lens 40 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0221] (Fifth Embodiment)

[0222] The fifth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0223] Fig.17 FIG. 1 shows an imaging optical lens 50 according to a fifth embodiment of the present invention.

[0224] Table 13 shows design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0225]

Table 13

[0226]

[0227]

[0228] Tables 14 and 15 show aspherical surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0229]

Table 14

[0230]

[0231]

[0232]

Table 15

[0233]

[0234] Fig.18 , Fig.19 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 50 of the fifth embodiment are shown respectively. Fig. 20 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nm after passing through the camera optical lens 50 of the fifth embodiment. Fig. 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0235] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens is 5.114 mm, the image height IH of 1.0 field of view is 8.000 mm, the field angle FOV of 1.0 field of view is 85.28°, the image height IHm of the MIC field of view is 8.170 mm, and the field angle FOVm of the MIC field of view is 86.52°. The camera optical lens 50 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0236] Table 19 that appears later shows the values ​​corresponding to the parameters specified in the conditional expressions and various numerical values ​​in each of the first, second, third, fourth, and fifth embodiments.

[0237] (Comparative Implementation)

[0238] This comparative example is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0239] Fig.21 Shown is a camera optical lens 60 according to a comparative embodiment.

[0240] Table 16 shows design data of the imaging optical lens 60 of the comparative embodiment.

[0241]

Table 16

[0242]

[0243] Tables 17 and 18 show the aspherical surface data of each lens in the imaging optical lens 60 of the comparative example of the present invention.

[0244]

Table 17

[0245]

[0246]

Table 18

[0247]

[0248]

[0249] Fig. 22 , Fig.23 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the comparative imaging optical lens 60 are shown respectively. Fig.24 FIG. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the comparative camera optical lens 60. Fig.24 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0250] Table 19 below lists the values ​​corresponding to the various conditional expressions in the comparative embodiment according to the above conditional expressions. Obviously, the imaging optical lens 60 of the comparative embodiment does not satisfy the above conditional expression 17.00≤(f6-f7) / d12≤20.00.

[0251] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 5.013 mm, the image height IH of 1.0 field of view is 8.000 mm, the field angle FOV of 1.0 field of view is 86.18°, the image height IHm of the MIC field of view is 8.170 mm, and the field angle FOVm of the MIC field of view is 87.61°. The camera optical lens 30 does not meet the design requirements of large aperture, wide angle and ultra-thinness.

[0252]

Table 19

[0253]

[0254]

[0255] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A camera optical lens, characterized in that: The camera optical lens comprises seven lenses in total, and the seven lenses are, from the object side to the image side, in order: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive 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 central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the 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 focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, the axial distance from the image side surface of the sixth lens to the object side surface of the seventh lens is d12, the Abbe number of the first lens is v1, and the Abbe number of the second lens is v2, satisfying the following relationship: 1.10≤R9 / R10≤1.90; 1.50≤(R5+R6) / (R5-R6)≤2.80; 17.00≤(f6-f7) / d12≤20.00; 0.17≤(v1-v2)*d2 / (f1-f2)≤0.

32.

2. The imaging optical lens according to claim 1, characterized in that: The central curvature radius of the object side of the sixth lens is R11, the central curvature radius of the object side of the sixth lens is R12, the focal length of the sixth lens is f6, and the following relationship is satisfied: 1.2≤(R11+R12) / f6≤2.

05.

3. The imaging optical lens according to claim 1, characterized in that: The focal length of the camera optical lens is f, and the combined focal length of the first lens, the second lens, the third lens and the fourth lens is f1234, and the following relationship is satisfied: 1.25≤f1234 / f≤1.

40.

4. The imaging optical lens according to claim 1, wherein: The object side surface of the first lens is convex at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; The focal length of the camera optical lens is f, the central curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, the axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 1.12≤f1 / f≤1.18; -1.97≤(R1+R2) / (R1-R2)≤-1.93; 0.13≤d1 / TTL≤0.

14.

5. The imaging optical lens according to claim 1, wherein: The object side surface of the second lens is convex at the paraxial position, and the image side surface of the second lens is concave at the paraxial position; The focal length of the camera optical lens is f, the central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -9.24≤f2 / f≤-5.96; 7.14≤(R3+R4) / (R3-R4)≤10.82; 0.03≤d3 / TTL≤0.

04.

6. The imaging optical lens according to claim 1, characterized in that: 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 camera optical lens is f, the focal length of the third lens is f3, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -4.41≤f3 / f≤-3.07; 0.03≤d5 / TTL≤0.

04.

7. The imaging optical lens according to claim 1, characterized in that: The object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is convex at the paraxial position; The focal length of the camera optical lens is f, the focal length of the fourth lens is f4, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, and the following relationship is satisfied: 3.39≤f4 / f≤4.01; -0.91≤(R7+R8) / (R7-R8)≤-0.

59.

8. The imaging optical lens according to claim 1, characterized in that: The object side surface of the fifth lens is convex at the paraxial position, and the image side surface of the fifth lens is concave at the paraxial position; The focal length of the camera optical lens is f, the focal length of the fifth lens is f5, and the following relationship is satisfied: -50.60≤f5 / f≤-7.82; 3.24≤(R9+R10) / (R9-R10)≤20.

56.

9. The imaging optical lens according to claim 1, characterized in that: The object side surface of the sixth lens is convex at the paraxial position, and the image side surface of the sixth lens is concave at the paraxial position; The focal length of the camera optical lens is f, the central curvature radius of the object side of the sixth lens is R11, the central curvature radius of the image side of the sixth lens is R12, the axial thickness of the fifth lens is d11, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 1.03≤f6 / f≤1.21; -2.34≤(R11+R12) / (R11-R12)≤-1.68; 0.06≤d11 / TTL≤0.

08.

10. The imaging optical lens according to claim 1, characterized in that: The object side surface of the seventh lens is convex at the paraxial position, and the image side surface of the seventh lens is concave at the paraxial position; The focal length of the camera optical lens is f, the 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, and the following relationship is satisfied: -0.89≤f7 / f≤-0.86; 1.99≤(R13+R14) / (R13-R14)≤2.

07.

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

Images