Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens. The camera shooting optical lens sequentially comprises a first lens with negative refraction power, a second lens with positive refraction power, a third lens with positive refraction power, a fourth lens with negative refraction power, a fifth lens with positive refraction power and a sixth lens with negative refraction power from an object side to an image side, wherein the third lens is an aspheric glass lens, and the camera optical lens satisfies the following conditional expressions: v3 is greater than or equal to 60.00 and less than or equal to 82.00; 58.00 degrees < = FOV / FNO < = 64.00 degrees; 0.05 < = (R3 + R4) / f2 < = 0.80; 1.00 < = (R5 + R6) / f3 < = 3.00.

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, six-element lens structures are gradually emerging in lens designs. There is an urgent need for telephoto 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 object of the present invention is to provide a camera optical lens that has good optical performance while meeting the design requirements of large aperture, wide angle and ultra-thinness.

[0004] To solve the above technical problems, an embodiment of the present invention provides an imaging optical lens, which includes, from the object side to the image side, a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having positive refractive power, and a sixth lens having negative refractive power;

[0005] Among them, the third lens is an aspheric glass lens, the Abbe number of the third lens is V3, the focal length of the second lens is f2, the focal length of the third lens is f3, 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 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 field of view angle of 1.0 field of view of the camera optical lens is FOV, the aperture value of the camera optical lens is FNO, and the following conditions are satisfied: 60.00≤v3≤82.00; 58.00°≤FOV / FNO≤64.00°; 0.05≤(R3+R4) / f2≤0.80; 1.00≤(R5+R6) / f3≤3.00.

[0006] Preferably, the on-axis distance between the intersection of the image side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens is SAG52, the effective radius of the image side surface of the fifth lens is SD52, and the following condition is satisfied: 0.37≤|SAG52| / SD52≤0.46.

[0007] Preferably, 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 distance from the maximum effective aperture of the object side surface of the sixth lens to the maximum effective aperture of the image side surface of the sixth lens in the optical axis direction is ET6, the axial thickness of the sixth lens is d11, and the following condition is satisfied: 8.00≤(R11+R12) / (ET6-d11)≤13.60.

[0008] Preferably, the object side surface of the first lens is concave at the paraxial position, and the image side surface of the first lens is convex at the paraxial position; the focal length of the camera optical lens is f, the focal length of the first lens is f1, the central curvature radius of the object side surface of the first lens is R1, the central curvature radius of the image side surface of the first lens is R2, the axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following conditions are satisfied: -7.84≤f1 / f≤-2.06; -4.47≤(R1+R2) / (R1-R2)≤-1.02; 0.06≤d1 / TTL≤0.25.

[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 camera optical lens is f, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following conditions are satisfied: 2.88≤f2 / f≤72.78; -19.01≤(R3+R4) / (R3-R4)≤137.80; 0.03≤d3 / TTL≤0.09.

[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 convex at the paraxial position; the focal length of the camera optical lens is f, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following conditions are satisfied: 0.53≤f3 / f≤1.71; 0.20≤(R5+R6) / (R5-R6)≤1.07; 0.06≤d5 / TTL≤0.20.

[0011] Preferably, the object side surface of the fourth lens is convex at the paraxial point, and the image side surface of the fourth lens is concave at the paraxial point; 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 surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, the axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following conditions are satisfied: -8.28≤f4 / f≤-2.03; 0.78≤(R7+R8) / (R7-R8)≤4.08; 0.02≤d7 / TTL≤0.08.

[0012] Preferably, the object side surface of the fifth lens is concave at the paraxial position, and the image side surface of the fifth lens is convex at the paraxial position; the focal length of the imaging optical lens is f, the focal length of the fifth lens is f5, the central curvature radius of the object side surface of the fifth lens is R9, the central curvature radius of the image side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following conditions are satisfied: 0.51≤f5 / f≤1.67; 1.07≤(R9+R10) / (R9-R10)≤3.87; 0.05≤d9 / TTL≤0.17.

[0013] 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; the focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the central curvature radius of the object side surface of the sixth lens is R11, the central curvature radius of the image side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, the total optical length of the camera optical lens is TTL, and the following conditions are satisfied: -3.22≤f6 / f≤-0.84; 1.41≤(R11+R12) / (R11-R12)≤4.89; 0.03≤d11 / TTL≤0.11.

[0014] Preferably, the focal length of the camera optical lens is f, the combined focal length of the first lens and the second lens is f12, and the following condition is satisfied: -19.42≤f12 / f≤-2.70.

[0015] The beneficial effects of the present invention are that the camera optical lens according to the present invention has excellent optical properties, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

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

[0018] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0019] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0020] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0021] Figure 5 2 is a schematic structural diagram of a second embodiment of an imaging optical lens according to the present invention;

[0022] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0023] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0024] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0025] Figure 9 2 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0026] Figure 10 yes Figure 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0027] Figure 11 yes Figure 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0028] Figure 12 yes Figure 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0029] Figure 132 is a schematic structural diagram of a fourth embodiment of an imaging optical lens according to the present invention;

[0030] Figure 14 yes Figure 13 Schematic diagram of axial aberration of the camera optical lens shown;

[0031] Figure 15 yes Figure 13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0032] Figure 16 yes Figure 13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0033] Figure 17 2 is a schematic structural diagram of a camera optical lens according to a fifth embodiment of the present invention;

[0034] Figure 18 yes Figure 17 Schematic diagram of axial aberration of the camera optical lens shown;

[0035] Figure 19 yes Figure 17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0036] Figure 20 yes Figure 17 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0037] 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.

[0038] With reference to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10 , 20 , 30 , 40 , 50 . Figure 1 、 5 Figures 9, 13, and 17 illustrate the imaging optical lenses 10, 20, 30, 40, and 50 of the present invention. These lenses comprise a total of six 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, and a sixth lens L6. An optical element such as an optical filter GF may be disposed between the sixth lens L6 and the image plane Si.

[0039] The first lens L1 has negative refractive power, the second lens L2 has positive refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.

[0040] The Abbe number of the third lens element is V3, which satisfies the following conditional expression: 60.00≤v3≤82.00. In addition, the third lens element L3 is an aspherical glass lens. Within the range of the conditional expression, the material properties can be effectively distributed and the chromatic aberration can be effectively corrected to make the chromatic aberration |LC| ≤5.0μm.

[0041] The field of view angle of 1.0 field of view of the camera optical lens is FOV, and the aperture value of the camera optical lens is FNO, which satisfies the following conditional formula: 58.00°≤FOV / FNO≤64.00°. Within the range of the conditional formula, the large aperture and ultra-wide angle requirements of the camera optical lens can be effectively met.

[0042] The central radius of curvature of the object-side surface of the second lens L2 is R3, the central radius of curvature of the image-side surface thereof is R4, and the focal length of the second lens L2 is f2, satisfying the following condition: 0.05≤(R3+R4) / f2≤0.80. This condition helps reduce the sensitivity of the imaging optical lens by rationally controlling the surface shape of the second lens L2, improves the manufacturing yield by reducing the molding difficulty, and also reduces stray light generated by the imaging optical lens, thereby improving the imaging quality of the imaging optical lens.

[0043] The central curvature radius of the object side surface of the third lens L3 is R5, the central curvature radius of the image side surface thereof is R6, and the focal length of the third lens L3 is f3, satisfying the following conditional equation: 1.00≤(R5+R6) / f3≤3.00. This conditional equation helps reduce the sensitivity of the camera optical lens by reasonably controlling the surface shape of the third lens L3, improves the manufacturing yield by reducing the molding difficulty, and can also reduce the stray light generated by the camera optical lens, thereby improving the imaging quality of the camera optical lens.

[0044] When the above conditions are met, the camera optical lenses 10, 20, 30, 40, and 50 have good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thinness; according to the characteristics of the camera optical lenses 10, 20, 30, 40, and 50, the camera optical lenses 10, 20, 30, 40, and 50 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0045] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0046] The on-axis distance between the intersection of the image side surface of the fifth lens L5 and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens L5 is SAG52, the effective radius of the image side surface of the fifth lens L5 is SD52, and satisfies the following conditional formula: 0.37≤|SAG52| / SD52≤0.46, which stipulates the ratio of the sag height of the image side surface of the fifth lens L5 to the effective semi-aperture. Within the range of the conditional formula, the camera optical lens has good stray light performance and is easy to process.

[0047] The central radius of curvature of the object-side surface of the sixth lens L6 is R11, the central radius of curvature of the image-side surface of the sixth lens L6 is R12, the distance from the maximum effective aperture of the object-side surface of the sixth lens L6 to the maximum effective aperture of the image-side surface of the sixth lens L6 in the optical axis direction is ET6, the on-axis thickness of the sixth lens L6 is d11, and the following conditional expression is satisfied: 8.00≤(R11+R12) / (ET6-d11)≤13.60. Within the range of the conditional expression, by reasonably controlling the shape of the sixth lens L6 and reducing the difficulty of molding, the manufacturing yield is improved, and the stray light generated by the camera optical lens can also be reduced, thereby improving the imaging quality of the camera optical lens.

[0048] The first lens L1 is made of plastic, the second lens L2 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.

[0049] The object side surface of the first lens L1 is concave at the paraxial position, and the image side surface of the first lens L1 is convex at the paraxial position. The object side surface and image side surface of the first lens L1 can also be set to other concave and convex distributions.

[0050] The focal length of the imaging optical lens is f, and the focal length of the first lens L1 is f1, satisfying the following condition: -7.84 ≤ f1 / f ≤ -2.06. This condition specifies the ratio of the negative refractive power of the first lens L1 to the overall focal length. Within this range, the first lens L1 has an appropriate negative refractive power, which helps reduce aberrations in the imaging optical lens and facilitates the development of ultra-thin and wide-angle lenses. Preferably, -4.90 ≤ f1 / f ≤ -2.57 is satisfied.

[0051] The central radius of curvature of the object-side surface of first lens L1 is defined as R1, and the central radius of curvature of the image-side surface of first lens L1 is defined as R2. The following condition is satisfied: -4.47 ≤ (R1 + R2) / (R1 - R2) ≤ -1.02. The shape of first lens L1 is appropriately controlled so that first lens L1 can effectively correct system spherical aberration. Preferably, -2.79 ≤ (R1 + R2) / (R1 - R2) ≤ -1.28.

[0052] The axial thickness of the first lens L1 is d1, and the total optical length of the camera optical lens is TTL, which satisfies the following condition: 0.06≤d1 / TTL≤0.25. Within the condition, it is advantageous to achieve ultra-thinness. Preferably, 0.10≤d1 / TTL≤0.20 is satisfied.

[0053] 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. The object-side surface and the image-side surface of the second lens L2 can also be set to other concave and convex distributions.

[0054] The second lens element L2 satisfies the following conditional equation: 2.88 ≤ f2 / f ≤ 72.78. This conditional equation specifies the ratio of the focal length f2 of the second lens element L2 to the focal length f of the imaging optical lens. Within this range, the field curvature of the imaging optical lens can be effectively balanced. Preferably, 4.60 ≤ f2 / f ≤ 58.23 is satisfied.

[0055] The second lens element L2 also satisfies the following condition: -19.01 ≤ (R3 + R4) / (R3 - R4) ≤ 137.80, which defines the shape of the second lens element L2. Within this range, as lenses become thinner and wider-angle lenses become increasingly popular, it helps correct for axial chromatic aberration. Preferably, -11.88 ≤ (R3 + R4) / (R3 - R4) ≤ 110.24.

[0056] The axial thickness of the second lens L2 is d3, which satisfies the following condition: 0.03≤d3 / TTL≤0.09. Within the condition, it is advantageous to achieve ultra-thinness. Preferably, it satisfies 0.04≤d3 / TTL≤0.08.

[0057] The object-side surface of the third lens L3 is convex at the paraxial position, and the image-side surface thereof is convex at the paraxial position. The object-side surface and the image-side surface of the third lens L3 can also be configured with other concave and convex distributions.

[0058] The third lens element L3 of the imaging optical lens satisfies the following conditional equation: 0.53 ≤ f3 / f ≤ 1.71. This conditional equation specifies the ratio of the focal length of the third lens element L3 to that of the imaging optical lens. Within this conditional equation, by rationally allocating the optical focal length of the imaging optical lens, the imaging optical lens exhibits excellent imaging quality and low sensitivity. Preferably, 0.84 ≤ f3 / f ≤ 1.37 is satisfied.

[0059] The third lens element L3 also satisfies the following conditional equation: 0.20 ≤ (R5 + R6) / (R5 - R6) ≤ 1.07. This conditional equation defines the shape of the third lens element L3 and facilitates its molding. Within the specified range, the degree of light deflection passing through the lens element is mitigated, effectively reducing aberrations. Preferably, the conditional equation satisfies 0.33 ≤ (R5 + R6) / (R5 - R6) ≤ 0.86.

[0060] The axial thickness of the third lens L3 is d5, which satisfies the following condition: 0.06≤d5 / TTL≤0.20. Within the condition, it is advantageous to achieve ultra-thinness. Preferably, 0.10≤d5 / TTL≤0.16 is satisfied.

[0061] The object-side surface of the fourth lens L4 is convex at the paraxial position, and the image-side surface is concave at the paraxial position. The object-side surface and image-side surface of the fourth lens L4 can also be set to other concave and convex distributions.

[0062] The focal length of the fourth lens L4 is f4, which satisfies the following condition: -8.28≤f4 / f≤-2.03. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -5.18≤f4 / f≤-2.54 is satisfied.

[0063] The central radius of curvature of the object-side surface of the fourth lens L4 is R7, and the central radius of curvature of the image-side surface is R8, and the following conditional equation is satisfied: 0.78 ≤ (R7 + R8) / (R7 - R8) ≤ 4.08. This conditional equation governs the shape of the fourth lens L4. Within this range, with the development of ultra-thin and wide-angle lenses, it is beneficial for correcting aberrations at off-axis angles. Preferably, 1.25 ≤ (R7 + R8) / (R7 - R8) ≤ 3.27 is satisfied.

[0064] The axial thickness of the fourth lens L4 is d7, which satisfies the following condition: 0.02≤d7 / TTL≤0.08. Within the condition, it is advantageous to achieve ultra-thinness. Preferably, 0.03≤d7 / TTL≤0.06 is satisfied.

[0065] The object-side surface of the fifth lens L5 is concave at the paraxial position, and the image-side surface is convex at the paraxial position. The object-side surface and image-side surface of the fifth lens L5 can also be set to other concave and convex distributions.

[0066] The focal length of the fifth lens L5 is f5, which satisfies the following condition: 0.51≤f5 / f≤1.67. This restriction on the fifth lens L5 can effectively smooth the angle of light rays of the camera optical lens and reduce tolerance sensitivity. Preferably, 0.82≤f5 / f≤1.34 is satisfied.

[0067] The central radius of curvature of the object-side surface of the fifth lens L5 is R9, and the central radius of curvature of the image-side surface of the fifth lens L5 is R10. The following conditional equation is satisfied: 1.07 ≤ (R9 + R10) / (R9 - R10) ≤ 3.87. This conditional equation specifies the shape of the fifth lens L5. Within this range, with the development of ultra-thin and wide-angle lenses, it is beneficial for correcting aberrations at off-axis angles. Preferably, 1.72 ≤ (R9 + R10) / (R9 - R10) ≤ 3.10 is satisfied.

[0068] The axial thickness of the fifth lens L5 is d9, which satisfies the following condition: 0.05≤d9 / TTL≤0.17. Within the condition, it is advantageous to achieve ultra-thinness. Preferably, 0.08≤d9 / TTL≤0.14 is satisfied.

[0069] The object-side surface of the sixth lens L6 is convex at the paraxial position, and the image-side surface is concave at the paraxial position. The object-side surface and the image-side surface of the sixth lens L6 can also be set to other concave and convex distributions.

[0070] The focal length of the sixth lens L6 is f6, which satisfies the following condition: -3.22≤f6 / f≤-0.84. Through the reasonable distribution of optical power, the camera optical lens has better imaging quality and lower sensitivity. Preferably, -2.01≤f6 / f≤-1.06 is satisfied.

[0071] The sixth lens element L6 also satisfies the following conditional equation: 1.41 ≤ (R11 + R12) / (R11 - R12) ≤ 4.89, which governs the shape of the sixth lens element L6. Within this conditional range, with the trend toward ultra-thin and wide-angle lenses, it is beneficial for correcting aberrations at off-axis angles. Preferably, 2.26 ≤ (R11 + R12) / (R11 - R12) ≤ 3.91 is satisfied.

[0072] The axial thickness of the sixth lens L6 is d11, which satisfies the following condition: 0.03≤d11 / TTL≤0.11. Within the condition, it is advantageous to achieve ultra-thinness. Preferably, 0.05≤d11 / TTL≤0.09 is satisfied.

[0073] The combined focal length of the first lens L1 and the second lens L2 is f12, satisfying the following condition: -19.42 ≤ f12 / f ≤ -2.70. Within this condition, aberrations and distortions of the imaging optical lens can be eliminated, the back focus of the imaging optical lens can be suppressed, and the miniaturization of the imaging lens system can be maintained. Preferably, -12.14 ≤ f12 / f ≤ -3.38 is satisfied.

[0074] The image height of the camera optical lens at a field of view of 1.0 is IH, and satisfies the following condition: 1.67≤TTL / IH≤1.88, thereby facilitating ultra-thinness. Preferably, 1.69≤TTL / IH≤1.83 is satisfied.

[0075] The field of view (FOV) of the camera optical lens with a field of view of 1.0° satisfies the conditional formula: 112.70°≤FOV≤128.16°, thereby achieving a wide angle. Preferably, the conditional formula is satisfied: 113.85°≤FOV≤125.67°.

[0076] The aperture value FNO of the camera optical lens satisfies the conditional formula: 1.92≤FNO≤2.04, thereby achieving a large aperture and good imaging performance of the camera optical lens. Preferably, the conditional formula 1.94≤FNO≤2.00 is satisfied.

[0077] The following examples illustrate the camera optical lens of the present invention. The symbols recorded in each example are as follows: Focal length, on-axis distance, central curvature radius, effective radius, on-axis thickness, image height IH, and image height IHm are in units of mm.

[0078] TTL: total optical length (the on-axis distance from the object side of the first lens L1 to the image surface Si), in mm;

[0079] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0080] 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);

[0081] 1.0 Field of view FOV: the field of view angle corresponding to the effective pixels of the sensor;

[0082] Image height of MIC field of view IHm: the field of view height expanded beyond 1.0 to prevent assembly deviation;

[0083] MIC field of view FOVm: the field of view angle corresponding to the MIC field of view image height;

[0084] Next, the technical solution of the present invention is described in detail with five embodiments.

[0085] (First embodiment)

[0086] Tables 1 and 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0087]

Table 1

[0088]

[0089] The meanings of the symbols are as follows.

[0090] S1: aperture;

[0091] R: radius of curvature at the center of the optical surface;

[0092] R1: the central curvature radius of the object side of the first lens L1;

[0093] R2: the central curvature radius of the image-side surface of the first lens L1;

[0094] R3: the central curvature radius of the object-side surface of the second lens L2;

[0095] R4: the central curvature radius of the image-side surface of the second lens L2;

[0096] R5: central radius of curvature of the object side surface of the third lens L3;

[0097] R6: central curvature radius of the image-side surface of the third lens L3;

[0098] R7: central curvature radius of the object side surface of the fourth lens L4;

[0099] R8: central curvature radius of the image-side surface of the fourth lens L4;

[0100] R9: the central radius of curvature of the object side surface of the fifth lens L5;

[0101] R10: central curvature radius of the image-side surface of the fifth lens L5;

[0102] R11: central curvature radius of the object-side surface of the sixth lens L6;

[0103] R12: central curvature radius of the image-side surface of the sixth lens L6;

[0104] R13: The central curvature radius of the object side of the optical filter GF;

[0105] R14: The central curvature radius of the image side of the optical filter GF;

[0106] d: the on-axis thickness of the lens and the on-axis distance between lenses;

[0107] d0: the on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0108] d1: axial thickness of the first lens L1;

[0109] 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;

[0110] d3: axial thickness of the second lens L2;

[0111] 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;

[0112] d5: axial thickness of the third lens L3;

[0113] 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;

[0114] d7: axial thickness of the fourth lens L4;

[0115] 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;

[0116] d9: axial thickness of the fifth lens L5;

[0117] 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;

[0118] d11: axial thickness of sixth lens L6;

[0119] d12: the on-axis distance between the image-side surface of the sixth lens L6 and the object-side surface of the optical filter GF;

[0120] d13: axial thickness of the optical filter GF;

[0121] d14: the axial distance from the image side of the optical filter GF to the image plane Si;

[0122] nd: refractive index of d-line (d-line is green light with a wavelength of 546nm);

[0123] nd1: the refractive index of the first lens L1 at the d-line;

[0124] nd2: the refractive index of the second lens L2 at the d-line;

[0125] nd3: the refractive index of the third lens L3 at the d-line;

[0126] nd4: the refractive index of the fourth lens L4 at the d-line;

[0127] nd5: the refractive index of the fifth lens L5 at the d-line;

[0128] nd6: the refractive index of the sixth lens L6 at the d-line;

[0129] ndg: refractive index of the d-line of the optical filter GF;

[0130] vd: Abbe number;

[0131] v1: Abbe number of the first lens L1;

[0132] v2: Abbe number of the second lens L2;

[0133] v3: Abbe number of the third lens L3;

[0134] v4: Abbe number of the fourth lens L4;

[0135] v5: Abbe number of the fifth lens L5;

[0136] v6: Abbe number of sixth lens L6;

[0137] vg: Abbe number of the optical filter GF.

[0138] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0139]

Table 2

[0140]

[0141]

[0142] 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).

[0143] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0144] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0145] 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).

[0146] Figure 2 、 Figure 3 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 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.

[0147] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 1.111 mm, the image height IH of the 1.0 field of view is 3.575 mm, the field of view angle FOV of the 1.0 field of view is 120.03°, the image height IHm of the MIC field of view is 3.675 mm, and the field of view angle FOVm of the MIC field of view is 122.41°. 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.

[0148] (Second embodiment)

[0149] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0150] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0151] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0152]

Table 3

[0153]

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

[0155]

Table 4

[0156]

[0157]

[0158] Figure 6 、 Figure 7 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 20 of the second embodiment. 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.

[0159] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 1.013 mm, the image height IH of the 1.0 field of view is 3.575 mm, the field of view angle FOV of the 1.0 field of view is 115.03°, the image height IHm of the MIC field of view is 3.675 mm, and the field of view angle FOVm of the MIC field of view is 118.26°. 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.

[0160] (Third embodiment)

[0161] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0162] Figure 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0163] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0164]

Table 5

[0165]

[0166] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0167]

Table 6

[0168]

[0169]

[0170] 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 12FIG. 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.

[0171] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 1.04 mm, the image height IH of the 1.0 field of view is 3.575 mm, the field of view angle FOV of the 1.0 field of view is 124.43°, the image height IHm of the MIC field of view is 3.675 mm, and the field of view angle FOVm of the MIC field of view is 126.57°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0172] (Fourth embodiment)

[0173] The meanings of the symbols in the fourth embodiment are the same as those in the first embodiment.

[0174] Figure 13 FIG. 4 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0175] Tables 7 and 8 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0176]

Table 7

[0177]

[0178] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0179]

Table 8

[0180]

[0181]

[0182] Figure 14 、 Figure 15 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 40 of the fourth embodiment are shown respectively. Figure 16 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0183] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 1.077 mm, the image height IH of the 1.0 field of view is 3.575 mm, the field of view angle FOV of the 1.0 field of view is 115.00°, the image height IHm of the MIC field of view is 3.675 mm, and the field of view angle FOVm of the MIC field of view is 116.59°. 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.

[0184] (Fifth embodiment)

[0185] The meanings of the symbols in the fifth embodiment are the same as those in the first embodiment.

[0186] Figure 17 FIG. 1 shows an imaging optical lens 50 according to a fifth embodiment of the present invention.

[0187] Tables 9 and 10 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0188]

Table 9

[0189]

[0190] Table 10 shows aspherical surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0191]

Table 10

[0192]

[0193]

[0194] Figure 18 、 Figure 19 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 50 of the fifth embodiment are shown respectively. Figure 20 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 50 of the fifth embodiment. Figure 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0195] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 1.111 mm, the image height IH of the 1.0 field of view is 3.575 mm, the field of view angle FOV of the 1.0 field of view is 120.01°, the image height IHm of the MIC field of view is 3.675 mm, and the field of view angle FOVm of the MIC field of view is 122.62°. 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.

[0196] Table 11 below lists the numerical values corresponding to the conditional expressions in each embodiment according to the above conditional expressions.

[0197]

Table 11

[0198] Parameters and Conditionals Implementation Method 1 Implementation Method 2 Implementation 3 Implementation 4 Implementation 5 v3 76.46 82.00 60.00 76.46 76.46 FOV / FNO 60.615° 58.059° 63.560° 58.093° 60.605° (R3+R4) / f2 0.406 0.050 0.331 0.800 0.571 (R5+R6) / f3 1.465 1.000 1.352 3.000 2.044 f 2.200 2.007 2.036 2.132 2.200 f1 -6.783 -7.867 -6.875 -7.627 -7.443 f2 13.073 97.385 16.688 13.757 12.651 f3 2.450 2.285 2.324 2.244 2.392 f4 -7.329 -8.311 -6.495 -6.488 -6.767 f5 2.263 2.233 2.191 2.282 2.245 f6 -2.903 -3.234 -3.057 -2.775 -2.787 f12 -15.398 -8.129 -12.231 -20.588 -21.363 TTL 6.091 6.262 6.135 6.409 6.199 FNO 1.980 1.981 1.958 1.980 1.980 SAG52 -0.694 -0.730 -0.739 -0.742 -0.664 SD52 1.676 1.612 1.672 1.699 1.776 ET6 0.629 0.675 0.699 0.603 0.630

[0199] 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, in order from the object side to the image side: a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having positive refractive power, and a sixth lens having negative refractive power; Wherein, the third lens is an aspherical glass lens, the Abbe number of the third lens is V3, the focal length of the second lens is f2, the focal length of the third lens is f3, 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 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 field of view angle of 1.0 field of view of the camera optical lens is FOV, the aperture value of the camera optical lens is FNO, and the following conditional formula is satisfied: 60.00≤v3≤82.00； 58.00°≤FOV / FNO≤64.00°; 0.05≤(R3+R4) / f2≤0.80; 1.00≤(R5+R6) / f3≤3.

00.

2. The imaging optical lens according to claim 1, wherein: The on-axis distance between the intersection of the image-side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fifth lens is SAG52, the effective radius of the image-side surface of the fifth lens is SD52, and the following conditional formula is satisfied: 0.37≤|SAG52| / SD52≤0.

46.

3. 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 distance from the maximum effective aperture of the object side surface of the sixth lens to the maximum effective aperture of the image side surface of the sixth lens in the optical axis direction is ET6, the axial thickness of the sixth lens is d11, and the following conditional formula is satisfied: 8.00≤(R11+R12) / (ET6-d11)≤13.

60.

4. The imaging optical lens according to claim 1, wherein: The object side surface of the first lens is concave at the paraxial position, and the image side surface of the first lens is convex at the paraxial position; The focal length of the camera optical lens is f, the focal length of the first lens is f1, the central 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 conditional formula is satisfied: -7.84≤f1 / f≤-2.06; -4.47≤(R1+R2) / (R1-R2)≤-1.02; 0.06≤d1 / TTL≤0.

25.

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 axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following conditional formula is satisfied: 2.88≤f2 / f≤72.78; -19.01≤(R3+R4) / (R3-R4)≤137.80; 0.03≤d3 / TTL≤0.

09.

6. The imaging optical lens according to claim 1, wherein: The object-side surface of the third lens is convex at the paraxial position, and the image-side surface of the third lens is convex at the paraxial position; The focal length of the camera optical lens is f, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following conditional formula is satisfied: 0.53≤f3 / f≤1.71; 0.20≤(R5+R6) / (R5-R6)≤1.07; 0.06≤d5 / TTL≤0.

20.

7. The imaging optical lens according to claim 1, wherein: The object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; The focal length of the 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, the axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following conditional formula is satisfied: -8.28≤f4 / f≤-2.03; 0.78≤(R7+R8) / (R7-R8)≤4.08; 0.02≤d7 / TTL≤0.

08.

8. The imaging optical lens according to claim 1, wherein: The object-side surface of the fifth lens is concave at the paraxial position, and the image-side surface of the fifth lens is convex at the paraxial position; The focal length of the camera optical lens is f, the focal length of the fifth lens is f5, the central curvature radius of the object side of the fifth lens is R9, the central curvature radius of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the camera optical lens is TTL, and the following conditional formula is satisfied: 0.51≤f5 / f≤1.67; 1.07≤(R9+R10) / (R9-R10)≤3.87; 0.05≤d9 / TTL≤0.

17.

9. The imaging optical lens according to claim 1, wherein: The object-side surface of the sixth lens is convex at the paraxial position, and the image-side surface of the sixth lens is concave at the paraxial position; The focal length of the camera optical lens is f, the focal length of the sixth lens is f6, the central curvature radius of the object side of the sixth lens is R11, the central curvature radius of the image side of the sixth lens is R12, the axial thickness of the sixth lens is d11, the total optical length of the camera optical lens is TTL, and the following conditional formula is satisfied: -3.22≤f6 / f≤-0.84; 1.41≤(R11+R12) / (R11-R12)≤4.89; 0.03≤d11 / TTL≤0.

11.

10. The imaging optical lens according to claim 1, wherein: The focal length of the camera optical lens is f, the combined focal length of the first lens and the second lens is f12, and the following conditional formula is satisfied: -19.42≤f12 / f≤-2.70.

Images