Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises, in sequence from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; wherein the focal length of the camera optical lens is f, the focal length of the second lens is f2, the focal length of the fifth lens is f5, 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 central curvature radius of the object side of the third lens is R5, the central curvature radius of the image side of the third lens is R6, the central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, and the following relationships are satisfied: -6.00 <= f2 / f <= -2.50; 3.00 <= f2 / f5 <= 8.00; -20.00 <= (R1+R2) / (R1-R2) <= -2.00; -30.00 <= (R5+R6) / (R5-R6) <= -5.00; and 5.00 <= R7 / R8 <= 15.00.

Description

Technical Field

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

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

[0003] To address the aforementioned problems, the present invention aims to provide a camera optical lens that, while possessing excellent optical performance, meets the design requirements of a large aperture, long focal length, and low distortion.

[0004] To solve the above-mentioned technical problems, embodiments of the present invention provide a camera optical lens comprising five lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; the object side of the first lens is convex at the paraxial direction, and the image side of the first lens is concave at the paraxial direction; the image side of the second lens is concave at the paraxial direction; the object side of the fourth lens is concave at the paraxial direction, and the image side of the fourth lens is convex at the paraxial direction; the object side of the fifth lens is concave at the paraxial direction, and the image side of the fifth lens is concave at the paraxial direction; wherein, the focal length of the camera optical lens is f, the focal length of the second lens is f2, and the focal length of the fifth lens is f5. The central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, the central radius of curvature of the object-side surface of the fourth lens is R7, the central radius of curvature of the image-side surface of the fourth lens is R8, the total optical length of the camera lens is TTL, the image height of the camera lens is IH, and the following relationships are satisfied: -6.00≤f2 / f≤-2.50; 3.00≤f2 / f5≤8.00; -20.00≤(R1+R2) / (R1-R2)≤-2.00; -30.00≤(R5+R6) / (R5-R6)≤-5.00; 5.00≤R7 / R8≤15.00; 1.169≤TTL / IH≤1.23.

[0005] Preferably, the axial thickness of the fourth lens is d7, the axial distance from the image side of the fourth lens to the object side of the fifth lens is d8, and the following relationship is satisfied: 1.00≤d7 / d8≤3.00.

[0006] Preferably, the focal length of the first lens is f1, the on-axis thickness of the first lens is d1, and the following relationships are satisfied: 0.40≤f1 / f≤4.00; 0.05≤d1 / TTL≤0.18.

[0007] Preferably, the center radius of curvature of the object side of the second lens is R3, the center radius of curvature of the image side of the second lens is R4, and the axial thickness of the second lens is d3, and the following relationships are satisfied: 0.23≤(R3+R4) / (R3-R4)≤14.95; 0.03≤d3 / TTL≤0.08.

[0008] Preferably, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the following relationships are satisfied: f3 / f≥-232.12; 0.03≤d5 / TTL≤0.10.

[0009] Preferably, the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, and the following relationships are satisfied: 0.43≤f4 / f≤2.23; 0.07≤d7 / TTL≤0.23.

[0010] Preferably, the center radius of curvature of the object side of the fifth lens is R9, the center radius of curvature of the image side of the fifth lens is R10, and the axial thickness of the fifth lens is d9, and satisfies the following relationships: -1.67≤f5 / f≤-0.39; 0.18≤(R9+R10) / (R9-R10)≤1.36; 0.04≤d9 / TTL≤0.19.

[0011] Preferably, the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.50≤f12 / f≤6.09.

[0012] Preferably, the field of view (FOV) of the camera optical lens in the diagonal direction is 83.50°≤FOV≤85.40°.

[0013] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0015] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0016] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0017] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0018] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0019] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0020] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0021] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0022] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0023] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0024] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0025] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0026] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0027] Figure 13 This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0028] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0029] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0030] Figure 16 yes Figure 13 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0031] Figure 17 This is a schematic diagram of the structure of the camera optical lens according to the fifth embodiment of the present invention;

[0032] Figure 18 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown;

[0033] Figure 19 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0034] Figure 20 yes Figure 17 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0035] Figure 21 This is a schematic diagram of the structure of the camera optical lens according to the sixth embodiment of the present invention;

[0036] Figure 22 yes Figure 21 A schematic diagram of axial aberrations of the camera optical lens shown;

[0037] Figure 23 yes Figure 21 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0038] Figure 24 yes Figure 21 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0039] Figure 25 This is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0040] Figure 26 yes Figure 21 A schematic diagram of axial aberrations of the camera optical lens shown;

[0041] Figure 27 Figure 21 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0042] Figure 28 yes Figure 21 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of the invention. However, the technical solutions claimed in this invention can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0044] (First Implementation)

[0045] Referring to the accompanying drawings, the present invention provides a camera optical lens 10. Figure 1The image shown is a camera optical lens 10 according to a first embodiment of the present invention. The camera optical lens 10 comprises nine lenses. Specifically, the camera optical lens 10, from the object side to the image side, consists of: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5. An optical filter GF or other optical element may be disposed between the fifth lens L5 and the image plane S1.

[0046] In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of plastic. In other optional embodiments, the lenses may be made of other materials.

[0047] In this embodiment, the focal length of the camera optical lens 10 is defined as f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: -6.00≤f2 / f≤-2.50. This specifies the ratio of the focal length f2 of the second lens L2 to the focal length of the camera optical lens 10. Within this range, the field curvature of the system can be effectively balanced, so that the field curvature shift of the central field of view is less than 10μm.

[0048] The focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: 3.00≤f2 / f5≤8.00. This specifies the ratio of the focal length of the second lens L2 to the focal length of the fifth lens L5. Through the reasonable allocation of focal lengths, the system has better imaging quality and lower sensitivity.

[0049] The center radius of curvature of the object side of the first lens L1 is defined as R1, and the center radius of curvature of the image side of the first lens L1 is defined as R2, satisfying the following relationship: -20.00≤(R1+R2) / (R1-R2)≤-2.00, which specifies the shape of the first lens L1. Within this range, it is beneficial for lens processing and assembly.

[0050] The central radius of curvature of the object side of the third lens L3 is R5, and the central radius of curvature of the image side of the third lens L3 is R6, satisfying the following relationship: -30.00≤(R5+R6) / (R5-R6)≤-5.00, which defines the shape of the third lens L3. Within this range, the degree of light deflection can be reduced, effectively correcting chromatic aberration and making the chromatic aberration |LC|≤1.5μm.

[0051] The center radius of curvature of the object side of the fourth lens L4 is R7, and the center radius of curvature of the image side of the fourth lens L4 is R8, satisfying the following relationship: 5.00≤R7 / R8≤15.00, which defines the shape of the fourth lens L4. Within this range, it is beneficial to correct the astigmatism and distortion of the camera lens, making the distortion|Distortion|≤2.5%, and reducing the possibility of vignetting.

[0052] The axial thickness of the fourth lens is d7, and the axial distance from the image side of the fourth lens to the object side of the fifth lens is d8, satisfying the following relationship: 1.00≤d7 / d8≤3.00. This specifies the ratio of the axial thickness of the fourth lens L4 to the axial distance from the image side of the fourth lens L4 to the object side of the fifth lens L5. Within the range of the condition, this helps to compress the total optical length of the camera optical lens 10 and achieve an ultra-thin effect.

[0053] In this embodiment, the object-side surface of the first lens L1 is convex near the axis, and the image-side surface is concave near the axis, thus the first lens L1 has positive refractive power. In other optional embodiments, the object-side surface and image-side surface of the first lens L1 may also be configured with other concave and convex distributions.

[0054] The focal length of the camera optical lens 10 is defined as f, and the focal length of the first lens L1 is defined as f1, satisfying the following relationship: 0.40≤f1 / f≤4.00. This specifies the ratio of the focal length of the first lens L1 to the focal length of the camera optical lens 10. Within this range, the field curvature of the camera optical lens 10 can be effectively balanced, so that the field curvature shift of the central field of view is less than 0.01mm. Preferably, it satisfies 0.64≤f1 / f≤3.20.

[0055] The first lens L1 has an on-axis thickness of d1, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.05≤d1 / TTL≤0.18. Within this range, miniaturization is advantageous. Preferably, 0.08≤d1 / TTL≤0.15 is satisfied.

[0056] In this embodiment, the object-side surface of the second lens L2 is concave near the axis, and the image-side surface is also concave near the axis, giving the second lens L2 negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0057] The center radius of curvature of the object-side surface of the second lens L2 is R3, and the center radius of curvature of the image-side surface of the second lens L2 is R4, satisfying the following relationship: 0.23≤(R3+R4) / (R3-R4)≤14.95, which defines the shape of the second lens L2. When within this range, as lenses develop towards ultra-thin and telephoto lenses, it is beneficial for correcting on-axis chromatic aberration. Preferably, it satisfies 0.36≤(R3+R4) / (R3-R4)≤11.96.

[0058] The second lens L2 has an on-axis thickness of d3, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d3 / TTL≤0.08. Within this range, miniaturization is advantageous. Preferably, 0.04≤d3 / TTL≤0.07 is satisfied.

[0059] In this embodiment, the object-side surface of the third lens L3 is convex near the axis, and the image-side surface is concave near the axis, thus the third lens L3 has positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.

[0060] The focal length of the camera optical lens 10 is defined as f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: f3 / f ≥ -232.12. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, f3 / f ≥ -145.08 is satisfied.

[0061] The on-axis thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.03≤d5 / TTL≤0.10. Within this range, miniaturization is advantageous. Preferably, 0.05≤d5 / TTL≤0.08 is satisfied.

[0062] In this embodiment, the object-side surface of the fourth lens L4 is concave near the axis, and the image-side surface is convex near the axis, thus the fourth lens L4 has positive refractive power. In other optional embodiments, the object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave and convex distributions.

[0063] The focal length of the camera optical lens 10 is defined as f, and the focal length of the fourth lens L4 is defined as f4, satisfying the following relationship: 0.43 ≤ f4 / f ≤ 2.23. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 0.69 ≤ f4 / f ≤ 1.78.

[0064] The fourth lens L4 has an on-axis thickness of d7, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.07≤d7 / TTL≤0.23. Within this range, miniaturization is advantageous. Preferably, 0.11≤d7 / TTL≤0.19 is satisfied.

[0065] In this embodiment, the object-side surface of the fifth lens L5 is concave near the axis, and the image-side surface is also concave near the axis, thus the fifth lens L5 has negative refractive power. In other optional embodiments, the object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions.

[0066] The focal length of the camera optical lens 10 is defined as f, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: -1.67 ≤ f5 / f ≤ -0.39. Limiting the fifth lens L5 effectively makes the light angle of the camera optical lens 10 smoother and reduces tolerance sensitivity. Preferably, it satisfies -1.04 ≤ f5 / f ≤ -0.48.

[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, satisfying the following relationship: 0.18≤(R9+R10) / (R9-R10)≤1.36. This defines the shape of the fifth lens L5. Within this range, with the development of ultra-thin and long focal length lenses, it is beneficial to correct aberrations at off-axis angles. Preferably, it satisfies 0.28≤(R9+R10) / (R9-R10)≤1.09.

[0068] The fifth lens L5 has an on-axis thickness of d9, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.04≤d9 / TTL≤0.19. Within this range, miniaturization is advantageous. Preferably, 0.06≤d9 / TTL≤0.15 is satisfied.

[0069] In this embodiment, the focal length of the imaging optical lens 10 is f, and the combined focal length of the first lens L1 and the second lens L2 is f12, satisfying the following relationship: 0.50≤f12 / f≤6.09. Within this range, aberrations and distortions of the imaging optical lens 10 can be eliminated, and the back focal length of the imaging optical lens 10 can be suppressed, maintaining the miniaturization of the image lens system assembly. Preferably, 0.79≤f12 / f≤4.87 is satisfied.

[0070] In this embodiment, the field of view (FOV) along the diagonal direction of the camera optical lens 10 is defined as FOV, satisfying the following relationship: FOV ≥ 83.50°, which is beneficial for achieving a wide-angle view. Preferably, FOV ≥ 85.00° is satisfied.

[0071] In this embodiment, the image height of the camera optical lens 10 is IH, the total optical length of the camera optical lens 10 is TTL, and the following relationship is satisfied: TTL / IH≤1.23, which is beneficial for miniaturization. Preferably, TTL / IH≤1.20 is satisfied.

[0072] In this embodiment, the aperture value FNO of the camera optical lens 10 is less than or equal to 2.56, thereby achieving a large aperture and good imaging performance. Preferably, the aperture value FNO of the camera optical lens 10 is less than or equal to 2.51.

[0073] The camera optical lens 10 has good optical performance while meeting the design requirements of large aperture, wide angle and ultra-thin design. Based on the characteristics of the camera optical lens 10, it is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0074] The camera optical lens 10 of the present invention will be described below with examples. The symbols described in each example are as follows. The units for focal length, on-axis distance, center radius of curvature, on-axis thickness, inversion point position, and stagnation point position are mm.

[0075] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0076] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0077] Preferably, the object-side and / or image-side surfaces of the lens may also be provided with inflection points and / or stagnation points to meet the requirements of high-quality imaging. Specific possible implementation schemes are described below.

[0078] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0079] Table 1

[0080]

[0081] The meanings of each symbol are as follows.

[0082] S1: Aperture;

[0083] R: Radius of curvature at the center of the optical surface;

[0084] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0085] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0086] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0087] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0088] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0089] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0090] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0091] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0092] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0093] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0094] R11: The center radius of curvature of the object side surface of the optical filter GF;

[0095] R12: Radius of curvature of the center of the image side of the optical filter GF;

[0096] d: Axial thickness of the lens, axial distance between lenses;

[0097] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0098] d1: On-axis thickness of the first lens L1;

[0099] 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;

[0100] d3: On-axis thickness of the second lens L2;

[0101] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0102] d5: On-axis thickness of the third lens L3;

[0103] 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;

[0104] d7: On-axis thickness of the fourth lens L4;

[0105] 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;

[0106] d9: On-axis thickness of the fifth lens L5;

[0107] d10: The on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the optical filter GF;

[0108] d11: On-axis thickness of the optical filter GF;

[0109] d12: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0110] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0111] nd1: The refractive index of the d-line of the first lens L1;

[0112] nd2: The refractive index of the d-line of the second lens L2;

[0113] nd3: The refractive index of the d-line of the third lens L3;

[0114] nd4: The refractive index of the d-line of the fourth lens L4;

[0115] nd5: The refractive index of the d-line of the fifth lens L5;

[0116] ndg: The refractive index of the d-line of the optical filter GF;

[0117] vd: Abbe number;

[0118] v1: Abbe number of the first lens L1;

[0119] v2: Abbe number of the second lens L2;

[0120] v3: Abbe number of the third lens L3;

[0121] v4: Abbe number of the fourth lens L4;

[0122] v5: Abbe number of the fifth lens L5;

[0123] vg: Abbe number of the optical filter GF.

[0124] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0125] Table 2

[0126]

[0127] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0128] z=(cr 2 ) / {1+[1-(k+1)(c 2r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 (1)

[0129] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and a tangent plane at the vertex of the aspheric optical axis).

[0130] Tables 3 and 4 show the inversion point and stagnation point design data of each lens in the camera optical lens 10 of the first embodiment of the present invention. P1R1 and P1R2 represent the object-side and image-side surfaces of the first lens L1, respectively; P2R1 and P2R2 represent the object-side and image-side surfaces of the second lens L2, respectively; P3R1 and P3R2 represent the object-side and image-side surfaces of the third lens L3, respectively; P4R1 and P4R2 represent the object-side and image-side surfaces of the fourth lens L4, respectively; and P5R1 and P5R2 represent the object-side and image-side surfaces of the fifth lens L5, respectively. The data in the "Inversion Point Position" column corresponds to the vertical distance from the inversion point set on the surface of each lens to the optical axis of the camera optical lens 10. The data in the "Stagnation Point Position" column corresponds to the vertical distance from the stagnation point set on the surface of each lens to the optical axis of the camera optical lens 10.

[0131] Table 3

[0132] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 P1R1 0 / / / P1R2 0 / / / P2R1 1 0.405 / / P2R2 0 / / / P3R1 1 0.145 / / P3R2 1 0.165 / / P4R1 1 0.995 / / P4R2 3 0.755 1.205 1.475 P5R1 2 0.865 2.175 / P5R2 3 0.325 1.855 2.285

[0133] Table 4

[0134] Number of outposts Location 1 P1R1 0 / P1R2 0 / P2R1 0 / P2R2 0 / P3R1 1 0.245 P3R2 1 0.275 P4R1 0 / P4R2 0 / P5R1 1 1.745 P5R2 1 0.715

[0135] Figure 2 , Figure 3 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 587nm, 546nm, 486nm and 435nm passes through the camera optical lens 10 of the first embodiment. Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0136] Table 29, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in the conditional expressions in each of the six embodiments.

[0137] As shown in Table 29, the first embodiment satisfies all the conditional expressions.

[0138] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 1.234 mm, the full field of view (IH) is 2.911 mm, and the field of view (FOV) in the diagonal direction is 85.20°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0139] (Second Implementation)

[0140] The second implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0141] In this embodiment, the object-side surface of the second lens L2 is convex near the axis.

[0142] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0143] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0144] Table 5

[0145]

[0146] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0147] Table 6

[0148]

[0149] Tables 7 and 8 show the inflection point and stagnation point design data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0150] Table 7

[0151] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 P1R1 1 0.615 / / P1R2 1 0.355 / / P2R1 2 0.235 0.275 / P2R2 0 / / / P3R1 0 / / / P3R2 0 / / / P4R1 3 0.145 0.335 1.075 P4R2 1 1.465 / / P5R1 2 0.925 1.865 / P5R2 3 0.415 2.015 2.045

[0152] Table 8

[0153] Number of outposts Location 1 P1R1 / / P1R2 / / P2R1 / / P2R2 / / P3R1 / / P3R2 / / P4R1 / / P4R2 / / P5R1 / / P5R2 1 0.825

[0154] Figure 6 , Figure 7Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 587nm, 546nm, 486nm and 435nm passes through the camera optical lens 20 of the second embodiment. Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0155] As shown in Table 29, the second embodiment satisfies all the conditional expressions.

[0156] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 20 is 1.236 mm, the full field of view (IH) is 2.911 mm, and the field of view (FOV) in the diagonal direction is 85.20°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0157] (Third Implementation)

[0158] The third implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0159] In this embodiment, the object-side surface of the second lens L2 is convex near the axis.

[0160] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0161] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0162] Table 9

[0163]

[0164] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0165] Table 10

[0166]

[0167] Tables 11 and 12 show the inflection point and stagnation point design data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0168] Table 11

[0169] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 Recurve point position 4 P1R1 1 0.605 / / / P1R2 3 0.405 0.555 0.585 / P2R1 0 / / / / P2R2 2 0.195 0.225 / / P3R1 2 0.525 0.565 / / P3R2 2 0.555 0.675 / / P4R1 3 0.275 0.825 1.275 / P4R2 3 0.555 1.015 1.485 / P5R1 4 0.875 2.375 2.465 2.525 P5R2 3 0.395 1.745 2.355 /

[0170] Table 12

[0171] Number of outposts Location 1 Station location 2 Location 3 P1R1 0 / / / P1R2 0 / / / P2R1 0 / / / P2R2 0 / / / P3R1 0 / / / P3R2 0 / / / P4R1 2 0.445 0.995 / P4R2 0 / / / P5R1 1 1.645 / / P5R2 3 0.955 2.125 2.565

[0172] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 587nm, 546nm, 486nm and 435nm passes through the camera optical lens 30 of the third embodiment. Figure 12 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes 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.

[0173] Table 29 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 30 of this embodiment satisfies the above-described conditional expressions.

[0174] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 30 is 1.234 mm, the full field of view (IH) is 2.911 mm, and the field of view (FOV) in the diagonal direction is 85.20°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0175] (Fourth Implementation)

[0176] The fourth implementation method is basically the same as the first implementation method, and the symbols have the same meanings as the first implementation method. Only the differences are listed below.

[0177] In this embodiment, the object-side surface of the third lens L1 is concave near the axis, the image-side surface of the third lens L1 is convex near the axis, and the third lens L1 has negative refractive power.

[0178] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0179] Tables 13 and 14 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0180] Table 13

[0181]

[0182] Table 14 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0183] Table 14

[0184]

[0185] Tables 15 and 16 show the inflection point and stagnation point design data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0186] Table 15

[0187] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 P1R1 0 / / / P1R2 1 0.455 / / P2R1 2 0.355 0.525 / P2R2 0 / / / P3R1 0 / / / P3R2 0 / / / P4R1 1 1.005 / / P4R2 2 1.375 1.405 / P5R1 2 0.895 2.495 / P5R2 3 0.345 1.965 2.525

[0188] Table 16

[0189] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 0 / / P2R1 0 / / P2R2 0 / / P3R1 0 / / P3R2 0 / / P4R1 0 / / P4R2 0 / / P5R1 1 1.825 / P5R2 2 0.735 2.335

[0190] Figure 14 , Figure 15 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 587nm, 546nm, 486nm and 435nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0191] Table 29 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 40 of this embodiment satisfies the above-described conditional expressions.

[0192] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 40 is 1.252 mm, the full field of view (IH) is 2.911 mm, and the field of view (FOV) in the diagonal direction is 85.20°. The camera optical lens 40 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0193] (Fifth Implementation)

[0194] The fifth embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0195] In this embodiment, the object-side surface of the second lens L2 is convex near the axis, and the third lens L3 has negative refractive power.

[0196] Figure 17 The image shown is a camera optical lens 50 according to the fifth embodiment of the present invention.

[0197] Tables 17 and 18 show the design data of the camera optical lens 50 according to the fifth embodiment of the present invention.

[0198] Table 17

[0199]

[0200] Table 18 shows the aspherical data of each lens in the camera optical lens 50 of the fifth embodiment of the present invention.

[0201] Table 18

[0202]

[0203] Tables 19 and 20 show the inflection point and stagnation point design data of each lens in the camera optical lens 50 of the fifth embodiment of the present invention.

[0204] Table 19

[0205] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 P1R1 0 / / / P1R2 1 0.315 / / P2R1 2 0.165 0.355 / P2R2 0 / / / P3R1 1 0.395 / / P3R2 1 0.415 / / P4R1 2 1.065 1.195 / P4R2 2 0.745 0.915 / P5R1 2 0.885 1.985 / P5R2 3 0.335 1.975 2.185

[0206] Table 20

[0207] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 0 / / P2R1 2 0.335 0.365 P2R2 0 / / P3R1 1 0.755 / P3R2 1 0.855 / P4R1 0 / / P4R2 0 / / P5R1 1 1.905 / P5R2 1 0.785 /

[0208] Figure 18 , Figure 19 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 587nm, 546nm, 486nm and 435nm passes through the camera optical lens 50 of the fifth embodiment. Figure 20 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera 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.

[0209] Table 29 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 50 of this embodiment satisfies the above-described conditional expressions.

[0210] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 1.252mm, the full field of view image height IH is 2.911mm, and the field of view FOV in the diagonal direction is 85.20°. The camera optical lens 50 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0211] (Sixth Implementation Method)

[0212] The sixth embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0213] In this embodiment, the object-side surface of the second lens L2 is convex near the axis, and the third lens L3 has negative refractive power.

[0214] Figure 21 The image shown is a camera optical lens 60 according to the sixth embodiment of the present invention.

[0215] Tables 21 and 22 show the design data of the camera optical lens 60 according to the sixth embodiment of the present invention.

[0216] Table 21

[0217]

[0218] Table 22 shows the aspherical data of each lens in the camera optical lens 60 of the sixth embodiment of the present invention.

[0219] Table 22

[0220]

[0221] Tables 23 and 24 show the inflection point and stagnation point design data of each lens in the camera optical lens 60 of the sixth embodiment of the present invention.

[0222] Table 23

[0223] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 P1R1 0 / / / P1R2 2 0.315 0.565 / P2R1 2 0.165 0.355 / P2R2 0 / / / P3R1 1 0.405 / / P3R2 1 0.415 / / P4R1 1 1.065 / / P4R2 2 0.765 0.915 / P5R1 2 0.875 2.005 / P5R2 3 0.345 1.985 2.205

[0224] Table 24

[0225] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 0 / / P2R1 2 0.325 0.375 P2R2 0 / / P3R1 1 0.755 / P3R2 1 0.855 / P4R1 0 / / P4R2 0 / / P5R1 1 1.895 / P5R2 1 0.795 /

[0226] Figure 22 , Figure 23 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 656nm, 587nm, 546nm, 486nm and 435nm passes through the camera optical lens 60 of the sixth embodiment. Figure 24 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 60 of the sixth embodiment. Figure 24 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0227] Table 29 below lists the values ​​of each conditional expression in this embodiment according to the above-described conditional expressions. Clearly, the camera optical lens 60 of this embodiment satisfies the above-described conditional expressions.

[0228] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 1.251mm, the full field of view image height IH is 2.911mm, and the field of view FOV in the diagonal direction is 85.40°. The camera optical lens 60 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0229] (Comparative implementation methods)

[0230] The symbols in the comparative implementation method have the same meanings as those in the first implementation method; only the differences are listed below.

[0231] Figure 25 The image shows a camera optical lens 70 according to a comparative embodiment.

[0232] Tables 25 and 26 show the design data for the camera optical lens 70 of the comparative embodiment.

[0233] Table 25

[0234]

[0235] Table 26 shows the aspherical data of each lens in the camera optical lens 70 of the comparative embodiment.

[0236] Table 26

[0237]

[0238] Tables 27 and 28 show the inflection point and stagnation point design data of each lens in the camera optical lens 70 of the comparative embodiment.

[0239] Table 27

[0240] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 P1R1 0 / / / P1R2 1 0.555 / / P2R1 2 0.325 0.495 / P2R2 0 / / / P3R1 1 0.145 / / P3R2 1 0.145 / / P4R1 1 0.965 / / P4R2 0 / / / P5R1 2 0.895 2.665 / P5R2 3 0.365 1.905 2.655

[0241] Table 28

[0242] Number of outposts Location 1 Station location 2 Location 3 P1R1 0 / / / P1R2 0 / / / P2R1 0 / / / P2R2 0 / / / P3R1 1 0.245 / / P3R2 1 0.245 / / P4R1 0 / / / P4R2 0 / / / P5R1 1 1.865 / / P5R2 3 0.855 2.385 2.815

[0243] Figure 26 , Figure 27 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 656nm, 587nm, 546nm, 486nm, and 435nm after passing through the camera optical lens 70 of the comparative embodiment. Figure 28 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 70 of the comparative embodiment. Figure 28 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0244] Table 29 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 70 of the comparative embodiment does not satisfy the above conditional expression -6.00≤f2 / f≤-2.50.

[0245] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 70 is 1.252mm, the full field of view image height IH is 2.911mm, and the field of view FOV in the diagonal direction is 85.20°. The camera optical lens 70 does not meet the design requirements of large aperture, wide angle, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are not fully corrected.

[0246] Table 29

[0247] Parameters and conditional expressions Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative implementation methods f2 / f -2.500 -5.978 -6.000 -2.500 -2.868 -2.855 -2.400 f2 / f5 4.285 7.954 7.182 3.002 4.880 4.933 3.220 (R1+R2) / (R1-R2) -2.010 -2.553 -19.828 -2.045 -2.231 -2.234 -2.002 (R5+R6) / (R5-R6) -29.986 -5.000 -5.178 -5.001 -29.862 -24.362 -12.924 R7 / R8 5.002 14.999 13.545 15.000 6.375 6.636 14.999 d7 / d8 1.080 2.989 1.002 1.000 1.464 1.532 1.607 f 3.059 3.068 3.062 3.058 3.068 3.064 3.030 f1 2.588 2.705 8.166 2.440 2.768 2.775 2.480 f2 -7.648 -18.341 -18.372 -7.646 -8.799 -8.747 -7.273 f3 240.361 7546101.513 4.415 -354.914 39.371 34.027 110.293 f4 2.694 3.944 3.284 4.538 2.674 2.660 3.739 f5 -1.785 -2.306 -2.558 -2.547 -1.803 -1.773 -2.259 FNO 2.49 2.48 2.48 2.44 2.45 2.45 2.42 f12 3.515 3.038 12.431 3.244 3.673 3.693 3.356 TTL 3.416 3.404 3.415 3.415 3.413 3.415 3.415 IH 2.911 2.911 2.911 2.911 2.911 2.911 2.911 FOV 85.200 85.200 85.200 85.200 85.200 85.400 85.20

[0248] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A camera optical lens, characterized in that, The camera optical lens comprises five lenses, which, from the object side to the image side, are as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; the object side of the first lens is convex at the paraxial direction, and the image side of the first lens is concave at the paraxial direction; the image side of the second lens is concave at the paraxial direction; the object side of the fourth lens is concave at the paraxial direction, and the image side of the fourth lens is convex at the paraxial direction; the object side of the fifth lens is concave at the paraxial direction, and the image side of the fifth lens is concave at the paraxial direction. Wherein, the focal length of the camera optical lens is f, the focal length of the second lens is f2, the focal length of the fifth lens is f5, the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, the central radius of curvature of the object-side surface of the fourth lens is R7, the central radius of curvature of the image-side surface of the fourth lens is R8, the total optical length of the camera optical lens is TTL, the image height of the camera optical lens is IH, and the following relationship is satisfied: -6.00≤f² / f≤-2.50; 3.00≤f2 / f5≤8.00; -20.00≤(R1+R2) / (R1-R2)≤-2.00; -30.00≤(R5+R6) / (R5-R6)≤-5.00; 5.00≤R7 / R8≤15.00; 1.169≤TTL / IH≤1.

23.

2. The camera optical lens according to claim 1, characterized in that, The fourth lens has an axial thickness of d7, and the axial distance from the image side of the fourth lens to the object side of the fifth lens is d8, satisfying the following relationship: 1.00≤d7 / d8≤3.

00.

3. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the on-axis thickness of the first lens is d1, and the following relationship is satisfied: 0.40≤f1 / f≤4.00; 0.05≤d1 / TTL≤0.

18.

4. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, and the axial thickness of the second lens is d3, satisfying the following relationship: 0.23≤(R3+R4) / (R3-R4)≤14.95; 0.03≤d3 / TTL≤0.

08.

5. The camera optical lens according to claim 1, characterized in that, The third lens has a focal length of f3 and an on-axis thickness of d5, and satisfies the following relationship: f3 / f ≥ -232.12; 0.03≤d5 / TTL≤0.

10.

6. The camera optical lens according to claim 1, characterized in that, The fourth lens has a focal length of f4 and an on-axis thickness of d7, and satisfies the following relationship: 0.43≤f4 / f≤2.23; 0.07≤d7 / TTL≤0.

23.

7. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object-side surface of the fifth lens is R9, the central radius of curvature of the image-side surface of the fifth lens is R10, and the axial thickness of the fifth lens is d9, satisfying the following relationship: -1.67≤f5 / f≤-0.39; 0.18≤(R9+R10) / (R9-R10)≤1.36; 0.04≤d9 / TTL≤0.

19.

8. The camera optical lens according to claim 1, characterized in that, The combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.50≤f12 / f≤6.

09.

9. The camera optical lens according to claim 8, characterized in that, The field of view (FOV) of the camera optical lens along its diagonal direction is defined as follows: 83.50°≤FOV≤85.40°.

Images