Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises seven lenses in sequence from the object side to the image side, namely a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power and a seventh lens with negative refractive power; wherein 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 third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the on-axis thickness of the second lens is d3, the on-axis distance from the image side surface of the second lens to the object side surface of the third lens is d4, and the following relationships are satisfied: -6.00 <= f4 / f <= 10.00; 2.00 <= d3 / d4 <= 5.00; -10.00 <= R5 / R6 <= -1.00. The camera optical lens has good optical performance and meets the design requirements of large aperture, wide angle and ultra-thin.

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 smartphones, 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 slim, lightweight designs, 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, seven-element lens structures are gradually appearing in lens designs. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, small size, and adequate aberration correction. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a camera optical lens that, while possessing excellent optical performance, meets the design requirements of large aperture, wide-angle, and ultra-thin design.

[0004] To solve the above-mentioned technical problems, embodiments of the present invention provide a camera optical lens comprising seven lenses, which are arranged sequentially from the object side to the image side as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with negative refractive power; wherein, the focal length of the camera optical lens is f, the focal length of the fourth lens is f4, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, the axial thickness of the second lens is d3, and the axial distance from the image side of the second lens to the object side of the third lens is d4, and satisfying the following relationships: -6.00≤f4 / f≤10.00; 2.00≤d3 / d4≤5.00; -10.00≤R5 / R6≤-1.00.

[0005] Preferably, the object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position; the focal length of the first lens is f1, the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the camera lens is TTL, and satisfies the following relationships: 0.50≤f1 / f≤1.60; -4.46≤(R1+R2) / (R1-R2)≤-1.25; 0.05≤d1 / TTL≤0.17.

[0006] Preferably, the camera optical lens satisfies the following relationships: 0.80≤f1 / f≤1.28; -2.79≤(R1+R2) / (R1-R2)≤-1.56; 0.08≤d1 / TTL≤0.14.

[0007] Preferably, the object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position; the focal length of the second lens is f2, the central 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 total optical length of the camera lens is TTL, and satisfies the following relationships: -5.97≤f2 / f≤-1.47; 0.76≤(R3+R4) / (R3-R4)≤5.03; 0.02≤d3 / TTL≤0.12.

[0008] Preferably, the camera optical lens satisfies the following relationships: -3.73≤f2 / f≤-1.84; 1.22≤(R3+R4) / (R3-R4)≤4.02; 0.04≤d3 / TTL≤0.09.

[0009] Preferably, the object-side surface of the third lens is convex near the axis, and the image-side surface of the third lens is convex near the axis; the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the total optical length of the camera lens is TTL, and satisfies the following relationships: 0.82≤f3 / f≤3.37; 0.01≤(R5+R6) / (R5-R6)≤1.23; 0.04≤d5 / TTL≤0.14.

[0010] Preferably, the camera optical lens satisfies the following relationships: 1.31≤f3 / f≤2.70; 0.02≤(R5+R6) / (R5-R6)≤0.98; 0.06≤d5 / TTL≤0.11.

[0011] Preferably, the central radius of curvature of the object side of the fourth lens is R7, the central radius of curvature of the image side of the fourth lens is R8, the axial thickness of the fourth lens is d7, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -15.06≤(R7+R8) / (R7-R8)≤-0.05; 0.02≤d7 / TTL≤0.11.

[0012] Preferably, the camera optical lens satisfies the following relationship: -9.41≤(R7+R8) / (R7-R8)≤-0.06; 0.04≤d7 / TTL≤0.09.

[0013] Preferably, the image-side surface of the fifth lens is convex near the axis; the focal length of the fifth lens is f5, 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, the axial thickness of the fifth lens is d9, and the total optical length of the camera lens is TTL, and satisfies the following relationships: 0.93≤f5 / f≤43.36; -1.27≤(R9+R10) / (R9-R10)≤9.36; 0.03≤d9 / TTL≤0.15.

[0014] Preferably, the camera optical lens satisfies the following relationships: 1.49≤f5 / f≤34.69; -0.79≤(R9+R10) / (R9-R10)≤7.49; 0.05≤d9 / TTL≤0.12.

[0015] Preferably, the object-side surface of the sixth lens is convex near the axis, and the image-side surface of the sixth lens is concave near the axis; the focal length of the sixth lens is f6, the central radius of curvature of the object-side surface of the sixth lens is R11, the central radius of curvature of the image-side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -45.59≤f6 / f≤-8.16; 6.57≤(R11+R12) / (R11-R12)≤29.22; 0.04≤d11 / TTL≤0.17.

[0016] Preferably, the camera optical lens satisfies the following relationships: -28.49≤f6 / f≤-10.20; 10.52≤(R11+R12) / (R11-R12)≤23.38; 0.07≤d11 / TTL≤0.14.

[0017] Preferably, the object-side surface of the seventh lens is concave near the axis, and the image-side surface of the seventh lens is concave near the axis; the focal length of the seventh lens is f7, the central radius of curvature of the object-side surface of the seventh lens is R13, the central radius of curvature of the image-side surface of the seventh lens is R14, the axial thickness of the seventh lens is d13, and the total optical length of the camera lens is TTL, and satisfies the following relationships: -2.11≤f7 / f≤-0.66; 0.11≤(R13+R14) / (R13-R14)≤1.00; 0.04≤d13 / TTL≤0.12.

[0018] Preferably, the camera optical lens satisfies the following relationships: -1.32≤f7 / f≤-0.82; 0.17≤(R13+R14) / (R13-R14)≤0.80; 0.06≤d13 / TTL≤0.09.

[0019] Preferably, the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.67≤f12 / f≤2.57.

[0020] Preferably, the aperture value of the camera optical lens is FNO, and satisfies the following relationship: FNO≤2.10.

[0021] Preferably, the field of view (FOV) of the camera optical lens in the diagonal direction is FOV and satisfies the following relationship: FOV≥83.88°.

[0022] Preferably, the image height of the camera optical lens is IH, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: TTL / IH≤1.32.

[0023] The beneficial effects of the present invention are as follows: the camera optical lens of 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

[0024] 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:

[0025] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0027] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0028] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0029] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0030] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0031] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0032] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0033] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0034] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0035] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0036] Figure 12 yes Figure 9 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0037] 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.

[0038] (First Implementation)

[0039] Referring to the accompanying drawings, the present invention provides a camera optical lens 10. Figure 1 The diagram shows a schematic of the camera optical lens 10 according to the first embodiment of the present invention. The camera optical lens 10 includes seven lenses. Specifically, the left side is the object side, and the right side is the image side. From the object side to the image side, the camera optical lens 10 consists of: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7. An optical filter GF or other optical element may be disposed between the seventh lens L7 and the image plane S1.

[0040] In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are all made of plastic. In other embodiments, the lenses may be made of other materials.

[0041] In this embodiment, 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: -6.00≤f4 / f≤10.00. This specifies the ratio of the focal length f4 of the fourth lens L4 to the focal length f of the camera optical lens 10. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0042] The axial thickness of the second lens L2 is defined as d3, and the axial distance from the image side of the second lens L2 to the object side of the third lens L3 is defined as d4, satisfying the following relationship: 2.00≤d3 / d4≤5.00. This specifies the ratio of the axial thickness d3 of the second lens L2 to the axial distance d4 from the image side of the second lens L2 to the object side of the third lens L3. Within the range of this relationship, it is beneficial for the camera optical lens 10 to develop towards a wider angle.

[0043] The central radius of curvature of the object side of the third lens L3 is defined as R5, and the central radius of curvature of the image side of the third lens L3 is defined as R6, satisfying the following relationship: -10.00≤R5 / R6≤-1.00. This defines the shape of the third lens L3, which is beneficial to the shaping of the third lens L3. Within the range specified by the relationship, the degree of deflection of light passing through the lens can be mitigated, effectively reducing aberrations.

[0044] In this embodiment, the first lens L1 has positive refractive power, and the object-side surface of the first lens L1 is convex near the axis, while the image-side surface is concave near the axis. In other embodiments, the object-side and image-side surfaces of the first lens L1 may also have other concave and convex distributions near the axis.

[0045] The focal length of the camera optical lens 10 is f, and the focal length of the first lens L1 is defined as f1, satisfying the following relationship: 0.50 ≤ f1 / f ≤ 1.60, which specifies the ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens 10. Within this specified range, the first lens L1 has appropriate positive refractive power, which is beneficial for reducing aberrations in the camera optical lens 10 and also facilitates the development of the camera optical lens 10 towards ultra-thinness and wide-angle capabilities. Preferably, 0.80 ≤ f1 / f ≤ 1.28 is satisfied.

[0046] The central radius of curvature of the object-side surface of the first lens L1 is defined as R1, and the central radius of curvature of the image-side surface of the first lens L1 is defined as R2, satisfying the following relationship: -4.46 ≤ (R1 + R2) / (R1 - R2) ≤ -1.25. By reasonably controlling the shape of the first lens L1, it is possible to effectively correct the spherical aberration of the imaging optical lens 10. Preferably, it satisfies -2.79 ≤ (R1 + R2) / (R1 - R2) ≤ -1.56.

[0047] The total optical length of the camera lens 10 is defined as TTL, and the on-axis thickness of the first lens L1 is d1, satisfying the following relationship: 0.05≤d1 / TTL≤0.17. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.08≤d1 / TTL≤0.14.

[0048] In this embodiment, the second lens L2 has negative refractive power. The object-side surface of the second lens L2 is convex near the axis, and the image-side surface is concave near the axis. In other embodiments, the object-side and image-side surfaces of the second lens L2 may also have other concave and convex distributions near the axis.

[0049] The focal length of the camera optical lens 10 is f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: -5.97 ≤ f2 / f ≤ -1.47. By controlling the negative optical power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the camera optical lens 10. Preferably, it satisfies -3.73 ≤ f2 / f ≤ -1.84.

[0050] The central radius of curvature of the object-side surface of the second lens L2 is defined as R3, and the central radius of curvature of the image-side surface of the second lens L2 is defined as R4, satisfying the following relationship: 0.76≤(R3+R4) / (R3-R4)≤5.03. This defines the shape of the second lens L2. Within this range, as the camera optical lens 10 develops towards ultra-thinness and wide-angle, it is beneficial for correcting on-axis chromatic aberration. Preferably, it satisfies 1.22≤(R3+R4) / (R3-R4)≤4.02.

[0051] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the second lens L2 is defined as d3, satisfying the following relationship: 0.02≤d3 / TTL≤0.12. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d3 / TTL≤0.09.

[0052] In this embodiment, the third lens L3 has positive refractive power, and both the object-side and image-side surfaces of the third lens L3 are convex near the axis. In other embodiments, the object-side and image-side surfaces of the third lens L3 may also have other concave and convex distributions near the axis.

[0053] The focal length of the camera optical lens 10 is f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: 0.82≤f3 / f≤3.37. Through reasonable allocation of optical power, the camera optical lens 10 has better imaging quality and lower sensitivity. Preferably, it satisfies 1.31≤f3 / f≤2.70.

[0054] The central radius of curvature of the object-side surface of the third lens L3 is defined as R5, and the central radius of curvature of the image-side surface of the third lens L3 is defined as R6, satisfying the following relationship: 0.01≤(R5+R6) / (R5-R6)≤1.23. This defines the shape of the third lens L3, which is beneficial for its formation. Within the specified range, the degree of light refraction after passing through the lens can be mitigated, effectively reducing aberrations. Preferably, 0.02≤(R5+R6) / (R5-R6)≤0.98 is satisfied.

[0055] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the third lens L3 is defined as d5, satisfying the following relationship: 0.04≤d5 / TTL≤0.14. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.06≤d5 / TTL≤0.11.

[0056] In this embodiment, the fourth lens L4 has negative refractive power, and both the object-side and image-side surfaces of the fourth lens L4 are concave near the axis. In other embodiments, the fourth lens L4 may also have positive refractive power, and the object-side and image-side surfaces of the fourth lens L4 may have other concave or convex distributions near the axis.

[0057] The central radius of curvature of the object-side surface of the fourth lens L4 is defined as R7, and the central radius of curvature of the image-side surface of the fourth lens L4 is defined as R8, satisfying the following relationship: -15.06≤(R7+R8) / (R7-R8)≤-0.05. This defines 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 in off-axis drawing angles. Preferably, it satisfies -9.41≤(R7+R8) / (R7-R8)≤-0.06.

[0058] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the fourth lens L4 is defined as d7, satisfying the following relationship: 0.02≤d7 / TTL≤0.11. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d7 / TTL≤0.09.

[0059] In this embodiment, the fifth lens L5 has positive refractive power, and both the object-side and image-side surfaces of the fifth lens L5 are convex near the axis. In other embodiments, the object-side and image-side surfaces of the fifth lens L5 may also have other concave and convex distributions near the axis.

[0060] The focal length of the camera optical lens 10 is f, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: 0.93≤f5 / f≤43.36. Limiting the fifth lens L5 effectively makes the light angle of the camera optical lens 10 smoother and reduces tolerance sensitivity. Preferably, it satisfies 1.49≤f5 / f≤34.69.

[0061] The central radius of curvature of the object-side surface of the fifth lens L5 is defined as R9, and the central radius of curvature of the image-side surface of the fifth lens L5 is defined as R10, satisfying the following relationship: -1.27≤(R9+R10) / (R9-R10)≤9.36. This defines 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 in off-axis drawing angles. Preferably, it satisfies -0.79≤(R9+R10) / (R9-R10)≤7.49.

[0062] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the fifth lens L5 is defined as d9, satisfying the following relationship: 0.03≤d9 / TTL≤0.15. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.05≤d9 / TTL≤0.12.

[0063] In this embodiment, the sixth lens L6 has negative refractive power. The object-side surface of the sixth lens L6 is convex near the axis, and the image-side surface is concave near the axis. In other embodiments, the object-side and image-side surfaces of the sixth lens L6 may also have other concave and convex distributions near the axis.

[0064] The focal length of the camera optical lens 10 is f, and the focal length of the sixth lens L6 is defined as f6, satisfying the following relationship: -45.59 ≤ f6 / f ≤ -8.16. Through reasonable allocation of optical power, the camera optical lens 10 has better imaging quality and lower sensitivity. Preferably, it satisfies -28.49 ≤ f6 / f ≤ -10.20.

[0065] The central radius of curvature of the object-side surface of the sixth lens L6 is defined as R11, and the central radius of curvature of the image-side surface of the sixth lens L6 is defined as R12, satisfying the following relationship: 6.57≤(R11+R12) / (R11-R12)≤29.22. This defines the shape of the sixth lens L6. Within this range, with the development of ultra-thin and wide-angle lenses, it is beneficial to correct aberrations in off-axis drawing angles. Preferably, it satisfies 10.52≤(R11+R12) / (R11-R12)≤23.38.

[0066] The total optical length of the camera lens 10 is TTL, and the on-axis thickness of the sixth lens L6 is defined as d11, satisfying the following relationship: 0.04≤d11 / TTL≤0.17. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.07≤d11 / TTL≤0.14.

[0067] In this embodiment, the seventh lens L7 has negative refractive power, and both the object-side and image-side surfaces of the seventh lens L7 are concave near the axis. In other embodiments, the object-side and image-side surfaces of the seventh lens L7 may also be configured with other concave / convex distributions near the axis.

[0068] The focal length of the camera optical lens 10 is defined as f, and the focal length of the seventh lens L7 is defined as f7, satisfying the following relationship: -2.11 ≤ f7 / f ≤ -0.66. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, -1.32 ≤ f7 / f ≤ -0.82 is satisfied.

[0069] The central radius of curvature of the object-side surface of the seventh lens L7 is defined as R13, and the central radius of curvature of the image-side surface of the seventh lens L7 is defined as R14, satisfying the following relationship: 0.11≤(R13+R14) / (R13-R14)≤1.00. This defines the shape of the seventh lens L7. Within this range, with the development of ultra-thin and wide-angle lenses, it is beneficial to correct aberrations in off-axis drawing angles. Preferably, it satisfies 0.17≤(R13+R14) / (R13-R14)≤0.80.

[0070] The axial thickness of the seventh lens L7 is d13, and the total optical length of the imaging optical lens 10 is TTL, satisfying the following relationship: 0.04≤d13 / TTL≤0.12. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.06≤d13 / TTL≤0.09.

[0071] 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: 0.67 ≤ f12 / f ≤ 2.57. Within this condition, 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, 1.07 ≤ f12 / f ≤ 2.05 is satisfied.

[0072] In this embodiment, the aperture value of the camera optical lens 10 is defined as FNO, satisfying the following relationship: FNO≤2.10, which is beneficial for achieving a large aperture. Preferably, FNO≤2.06 is satisfied.

[0073] 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 ≥ 83.88°, which is beneficial for achieving a wide-angle view. Preferably, FOV ≥ 84.74° is satisfied.

[0074] In this embodiment, the image height of the camera optical lens 10 is IH, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: TTL / IH≤1.32, which is beneficial for achieving ultra-thinness. Preferably, TTL / IH≤1.28 is satisfied.

[0075] When the above relationship is satisfied, the camera optical lens 10 can have good optical performance while meeting the design requirements of large aperture, wide angle and ultra-thin design. Based on the characteristics of the camera optical lens 10, the camera optical lens 10 is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0076] 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.

[0077] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image surface Si), in mm;

[0078] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0079] 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.

[0080] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0081] Table 1

[0082]

[0083] The meanings of each symbol are as follows.

[0084] S1: Aperture;

[0085] R: Radius of curvature at the center of the optical surface;

[0086] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0087] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0088] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0089] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0090] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0091] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0092] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0093] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0094] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0095] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0096] R11: The central radius of curvature of the object-side surface of the sixth lens L6;

[0097] R12: The central radius of curvature of the image-side surface of the sixth lens L6;

[0098] R13: The central radius of curvature of the object-side surface of the seventh lens L7;

[0099] R14: The central radius of curvature of the image-side surface of the seventh lens L7;

[0100] R15: The center radius of curvature of the object side surface of the optical filter GF;

[0101] R16: Radius of curvature of the center of the image side of the optical filter GF;

[0102] d: Axial thickness of the lens, axial distance between lenses;

[0103] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0104] d1: On-axis thickness of the first lens L1;

[0105] 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;

[0106] d3: On-axis thickness of the second lens L2;

[0107] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0108] d5: On-axis thickness of the third lens L3;

[0109] 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;

[0110] d7: On-axis thickness of the fourth lens L4;

[0111] 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;

[0112] d9: On-axis thickness of the fifth lens L5;

[0113] d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

[0114] d11: On-axis thickness of the sixth lens L6;

[0115] d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

[0116] d13: On-axis thickness of the seventh lens L7;

[0117] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0118] d15: On-axis thickness of the optical filter GF;

[0119] d16: The axial distance from the image-side surface of the optical filter GF to the image plane Si;

[0120] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0121] nd1: The refractive index of the d-line of the first lens L1;

[0122] nd2: The refractive index of the d-line of the second lens L2;

[0123] nd3: The refractive index of the d-line of the third lens L3;

[0124] nd4: The refractive index of the d-line of the fourth lens L4;

[0125] nd5: The refractive index of the d-line of the fifth lens L5;

[0126] nd6: The refractive index of the d-line of the sixth lens L6;

[0127] nd7: The refractive index of the d-line of the seventh lens L7;

[0128] ndg: The refractive index of the d-line of the optical filter GF;

[0129] vd: Abbe number;

[0130] v1: Abbe number of the first lens L1;

[0131] v2: Abbe number of the second lens L2;

[0132] v3: Abbe number of the third lens L3;

[0133] v4: Abbe number of the fourth lens L4;

[0134] v5: Abbe number of the fifth lens L5;

[0135] v6: Abbe number of the sixth lens L6;

[0136] v7: Abbe number of the seventh lens L7;

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

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

[0139] Table 2

[0140]

[0141] 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).

[0142] z=(cr 2 ) / {1+[1-(k+1)(c 2 r2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 (1)

[0143] 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).

[0144] Tables 3 and 4 show the inflection 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; P5R1 and P5R2 represent the object-side and image-side surfaces of the fifth lens L5, respectively; P6R1 and P6R2 represent the object-side and image-side surfaces of the sixth lens L6, respectively; and P7R1 and P7R2 represent the object-side and image-side surfaces of the seventh lens L7, respectively. The data corresponding to the "Inflection Point Position" column is the vertical distance from the inflection point set on the surface of each lens to the optical axis of the camera optical lens 10. The data in the "Station Point Position" field corresponds to the vertical distance from the station point set on each lens surface to the optical axis of the camera optical lens 10.

[0145] Table 3

[0146] Number of recurve points Recurve point location 1 Recurve point position 2 P1R1 1 1.485 / P1R2 1 0.865 / P2R1 0 / / P2R2 0 / / P3R1 1 0.655 / P3R2 0 / / P4R1 0 / / P4R2 2 0.315 1.725 P5R1 2 0.775 2.155 P5R2 2 0.515 0.675 P6R1 2 0.715 2.465 P6R2 2 0.845 3.515 P7R1 1 2.915 / P7R2 2 0.675 4.175

[0147] Table 4

[0148] Number of outposts Location 1 P1R1 0 / P1R2 1 1.405 P2R1 0 / P2R2 0 / P3R1 1 1.035 P3R2 0 / P4R1 0 / P4R2 1 0.535 P5R1 1 1.215 P5R2 0 / P6R1 1 1.215 P6R2 1 1.515 P7R1 1 4.385 P7R2 1 1.545

[0149] Figure 2 , Figure 3 A schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 650nm, 555nm and 470nm passes through the camera optical lens 10 of the first embodiment are shown respectively. Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0150] Table 13, which appears later, shows the values ​​corresponding to various numerical values ​​and parameters specified in the conditional formulas in each of the three implementation methods.

[0151] As shown in Table 13, the first embodiment satisfies all the conditional expressions.

[0152] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 3.238 mm, the full field of view (IH) is 6.247 mm, and the field of view (FOV) in the diagonal direction is 85.60°. 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.

[0153] (Second Implementation)

[0154] Figure 5 The diagram shown is a structural schematic of the camera optical lens 20 according to the second embodiment of the present invention. The second 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.

[0155] In this embodiment, the image-side surface of the fourth lens L4 is convex at the paraxial position.

[0156] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0157] Table 5

[0158]

[0159] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0160] Table 6

[0161]

[0162]

[0163] 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.

[0164] Table 7

[0165] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 Recurve point position 4 P1R1 0 / / / / P1R2 0 / / / / P2R1 1 0.465 / / / P2R2 1 0.775 / / / P3R1 3 0.995 1.055 1.295 / P3R2 0 / / / / P4R1 0 / / / / P4R2 1 1.715 / / / P5R1 2 0.995 2.525 / / P5R2 4 0.785 1.045 2.625 3.095 P6R1 3 0.705 2.555 3.455 / P6R2 2 0.985 3.825 / / P7R1 2 2.835 4.905 / / P7R2 3 0.815 4.195 5.125 /

[0166] Table 8

[0167]

[0168]

[0169] Figure 6 , Figure 7 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 555nm and 470nm 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 555nm passes through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0170] As shown in Table 13, the second embodiment satisfies all the conditional expressions.

[0171] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 20 is 3.232 mm, the full field of view (IH) is 6.247 mm, and the field of view (FOV) in the diagonal direction is 85.59°. 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.

[0172] (Third Implementation)

[0173] Figure 9 The diagram shown is a structural schematic of the camera optical lens 30 according to the third embodiment of the present invention. The third embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. Only the differences are listed below.

[0174] In this embodiment, the fourth lens L4 has positive refractive power, the object side of the fourth lens L4 is convex at the paraxial position, and the object side of the fifth lens L5 is concave at the paraxial position.

[0175] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0176] Table 9

[0177]

[0178]

[0179] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0180] Table 10

[0181]

[0182]

[0183] 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.

[0184] Table 11

[0185] Number of recurve points Recurve point location 1 Recurve point position 2 Recurve point position 3 Recurve point position 4 P1R1 0 / / / / P1R2 1 1.505 / / / P2R1 1 0.245 / / / P2R2 2 0.705 1.075 / / P3R1 1 0.895 / / / P3R2 0 / / / / P4R1 1 0.665 / / / P4R2 2 0.635 1.625 / / P5R1 3 0.175 1.015 2.295 / P5R2 2 0.235 1.055 / / P6R1 3 0.735 2.215 3.755 / P6R2 4 0.885 3.345 3.595 3.635 P7R1 3 3.025 3.905 4.205 / P7R2 3 0.605 4.285 4.555 /

[0186] Table 12

[0187] Number of outposts Location 1 Station location 2 P1R1 0 / / P1R2 0 / / P2R1 1 0.425 / P2R2 0 / / P3R1 1 1.275 / P3R2 0 / / P4R1 1 1.115 / P4R2 2 1.005 1.945 P5R1 2 0.305 1.345 P5R2 2 0.405 1.435 P6R1 1 1.215 / P6R2 1 1.545 / P7R1 0 / / P7R2 1 1.175 /

[0188] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 555nm and 470nm 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 555nm 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.

[0189] Table 13 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.

[0190] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 30 is 3.255 mm, the full field of view (IH) is 6.247 mm, and the field of view (FOV) in the diagonal direction is 85.62°. 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.

[0191] Table 13

[0192] Parameters and conditional expressions Example 1 Example 2 Example 3 f4 / f -2.18 -5.95 9.99 d3 / d4 2.01 4.93 3.50 R5 / R6 -1.05 -9.95 -5.49 f 6.605 6.594 6.641 f1 6.621 6.964 7.091 f2 -19.683 -19.693 -14.631 f3 14.858 10.814 12.577 f4 -14.373 -39.232 66.315 f5 12.275 28.771 191.958 f6 -150.555 -80.705 -150.039 f7 -6.588 -6.515 -6.995 f12 8.805 9.513 11.362 FNO 2.04 2.04 2.04 TTL 7.810 7.852 7.797 IH 6.247 6.247 6.247 FOV 85.60° 85.59° 85.62°

[0193] 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 seven lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with negative refractive power. The object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position. The 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 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 image-side surface of the fifth lens is convex at the paraxial position; 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 object-side surface of the seventh lens is concave at the paraxial level, and the image-side surface of the seventh lens is also concave at the paraxial level. Wherein, the focal length of the camera optical lens is f, the focal length of the fourth lens is f4, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, the axial thickness of the second lens is d3, and the axial distance from the image-side surface of the second lens to the object-side surface of the third lens is d4, and the following relationship is satisfied: -6.00≤f4 / f≤10.00; 2.00≤d3 / d4≤5.00; -10.00≤R5 / R6≤-1.

00.

2. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the central radius of curvature of the object side of the first lens is R1, the central radius of curvature of the image side of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 0.50≤f1 / f≤1.60; -4.46≤(R1+R2) / (R1-R2)≤-1.25; 0.05≤d1 / TTL≤0.

17.

3. The camera optical lens according to claim 2, characterized in that, The camera optical lens satisfies the following relationship: 0.80≤f1 / f≤1.28; -2.79≤(R1+R2) / (R1-R2)≤-1.56; 0.08≤d1 / TTL≤0.

14.

4. The camera optical lens according to claim 1, characterized in that, The focal length of the second lens is f2, the central radius of curvature of the object-side 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 total optical length of the imaging optical lens is TTL, satisfying the following relationship: -5.97≤f² / f≤-1.47; 0.76≤(R3+R4) / (R3-R4)≤5.03; 0.02≤d3 / TTL≤0.

12.

5. The camera optical lens according to claim 4, characterized in that, The camera optical lens satisfies the following relationship: -3.73≤f² / f≤-1.84; 1.22≤(R3+R4) / (R3-R4)≤4.02; 0.04≤d3 / TTL≤0.

09.

6. The camera optical lens according to claim 1, characterized in that, The third lens has a focal length of f3, an on-axis thickness of d5, and a total optical length of TTL, satisfying the following relationship: 0.82≤f³ / f≤3.37; 0.01≤(R5+R6) / (R5-R6)≤1.23; 0.04≤d5 / TTL≤0.

14.

7. The camera optical lens according to claim 6, characterized in that, The camera optical lens satisfies the following relationship: 1.31≤f3 / f≤2.70; 0.02≤(R5+R6) / (R5-R6)≤0.98; 0.06≤d5 / TTL≤0.

11.

8. The camera optical lens according to claim 1, characterized in that, 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 axial thickness of the fourth lens is d7, and the total optical length of the imaging optical lens is TTL, satisfying the following relationship: -15.06≤(R7+R8) / (R7-R8)≤-0.05; 0.02≤d7 / TTL≤0.

11.

9. The camera optical lens according to claim 8, characterized in that, The camera optical lens satisfies the following relationship: -9.41≤(R7+R8) / (R7-R8)≤-0.06; 0.04≤d7 / TTL≤0.

09.

10. The camera optical lens according to claim 1, characterized in that, The fifth lens has a focal length of f5, a central radius of curvature of the object-side surface of the fifth lens of R9, a central radius of curvature of the image-side surface of the fifth lens of R10, an axial thickness of d9, and a total optical length of TTL, satisfying the following relationship: 0.93≤f5 / f≤43.36; -1.27≤(R9+R10) / (R9-R10)≤9.36; 0.03≤d9 / TTL≤0.

15.

11. The camera optical lens according to claim 10, characterized in that, The camera optical lens satisfies the following relationship: 1.49≤f5 / f≤34.69; -0.79≤(R9+R10) / (R9-R10)≤7.49; 0.05≤d9 / TTL≤0.

12.

12. The camera optical lens according to claim 1, characterized in that, The sixth lens has a focal length of f6, a central radius of curvature of the object-side surface of the sixth lens of R11, a central radius of curvature of the image-side surface of the sixth lens of R12, an axial thickness of d11, and a total optical length of TTL, satisfying the following relationship: -45.59≤f6 / f≤-8.16; 6.57≤(R11+R12) / (R11-R12)≤29.22; 0.04≤d11 / TTL≤0.

17.

13. The camera optical lens according to claim 12, characterized in that, The camera optical lens satisfies the following relationship: -28.49≤f6 / f≤-10.20; 10.52≤(R11+R12) / (R11-R12)≤23.38; 0.07≤d11 / TTL≤0.

14.

14. The camera optical lens according to claim 1, characterized in that, The seventh lens has a focal length of f7, a central radius of curvature of the object-side surface of the seventh lens of R13, a central radius of curvature of the image-side surface of the seventh lens of R14, an axial thickness of d13, and a total optical length of TTL, satisfying the following relationship: -2.11≤f7 / f≤-0.66; 0.11≤(R13+R14) / (R13-R14)≤1.00; 0.04≤d13 / TTL≤0.

12.

15. The camera optical lens according to claim 14, characterized in that, The camera optical lens satisfies the following relationship: -1.32≤f7 / f≤-0.82; 0.17≤(R13+R14) / (R13-R14)≤0.80; 0.06≤d13 / TTL≤0.

09.

16. 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: 0.67≤f12 / f≤2.

57.

17. The camera optical lens according to claim 1, characterized in that, The aperture value of the camera optical lens is FNO, and it satisfies the following relationship: FNO≤2.

10.

18. The camera optical lens according to claim 1, characterized in that, The field of view (FOV) along the diagonal direction of the camera optical lens is defined as FOV, and satisfies the following relationship: FOV ≥ 83.88°.

19. The camera optical lens according to claim 1, characterized in that, The image height of the camera optical lens is IH, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: TTL / IH≤1.32.

Images