Camera lens

Abstract

The application relates to the field of optical lenses, and discloses a camera optical lens comprising five lenses, which are sequentially arranged from the object side to the image side as follows: a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; and the following relations are satisfied: 0.12 <= d1 / TTL <= 0.20; 5.00 <= R3 / R4 <= 15.00; and -1.30 <= (R5+R6) / (R5-R6) <= -1.00. The camera optical lens provided by the application can meet the design requirements of large aperture, ultra-thinning, and wide-angle.

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 lenses with excellent optical characteristics. A small wide-angle camera lens with fully corrected aberrations. Summary of the Invention

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

[0004] To achieve the above objectives, the present invention provides 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 positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power.

[0005] Wherein, the axial thickness of the first lens is d1, the total optical length of the imaging optical lens is TTL, 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, the central radius of curvature of the object-side surface of the third lens is R5, and the central radius of curvature of the image-side surface of the third lens is R6, and the following relationship is satisfied: 0.12≤d1 / TTL≤0.20; 5.00≤R3 / R4≤15.00; -1.30≤(R5+R6) / (R5-R6)≤-1.00.

[0006] Preferably, the focal length of the first lens is f1, and the focal length of the imaging optical lens is f, and they satisfy the following relationship: 1.00≤f1 / f≤1.35.

[0007] Preferably, the axial thickness of the fourth lens is d7, and the axial thickness of the fifth lens is d9, satisfying the following relationship: 0.70≤d7 / d9≤2.00.

[0008] Preferably, the full field-of-view image height of the camera optical lens is IH, the diagonal field of view of the camera optical lens is FOV, and the object-side diameter of the first lens is D, satisfying the following relationship: (H FOV) / D≤166.66°.

[0009] Preferably, the axial thickness of the second lens is d3, 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: 3.00≤d3 / d4≤20.00.

[0010] 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 convex at the paraxial position. The central radius of curvature of the object-side surface of the first lens is R1, and the central radius of curvature of the image-side surface of the first lens is R2, and they satisfy the following relationship: -1.70≤(R1+R2) / (R1-R2)≤-0.51.

[0011] Preferably, the object-side surface of the second lens is concave at the paraxial position, and the image-side surface of the second lens is convex at the paraxial position. The second lens has a focal length of f2, the imaging optical lens has a focal length of f, and the second lens has an on-axis thickness of d3, satisfying the following relationship: 0.51≤f² / f≤1.73; 0.57≤(R3+R4) / (R3-R4)≤2.10; 0.04≤d3 / TTL≤0.21.

[0012] Preferably, the object-side surface of the third lens is concave near the axis, and the image-side surface of the third lens is convex near the axis. The third lens has a focal length of f3, the camera optical lens has a focal length of f, and the third lens has an on-axis thickness of d5, satisfying the following relationship: -1.46≤f3 / f≤-0.42; 0.02≤d5 / TTL≤0.08.

[0013] Preferably, the image-side surface of the fourth lens is convex at the paraxial position; The fourth lens has a focal length of f4, the camera optical lens has a focal length of f, the object-side radius of curvature of the fourth lens is R7, the image-side radius of curvature of the fourth lens is R8, and the axial thickness of the fourth lens is d7, satisfying the following relationship: 0.26≤f4 / f≤0.84; 0.47≤(R7+R8) / (R7-R8)≤1.74; 0.07≤d7 / TTL≤0.28.

[0014] Preferably, the object-side surface of the fifth lens is convex at the paraxial position, and the image-side surface of the fifth lens is concave at the paraxial position. The fifth lens has a focal length of f5, the camera optical lens has a focal length of f, 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: -1.12≤f5 / f≤-0.35; 0.52≤(R9+R10) / (R9-R10)≤2.07; 0.05≤d9 / TTL≤0.29.

[0015] The beneficial effects of this invention are as follows: the camera optical lens according to this invention has excellent optical characteristics, and features a large aperture, wide angle, and ultra-thin design, making it particularly suitable for high-resolution CCDs. Mobile phone camera lens assembly and web camera lens composed of imaging elements such as CMOS. Attached Figure Description

[0016] 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: Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown; Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention; Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown; Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention; Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown; Figure 13 This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention; Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 16 yes Figure 13 A schematic diagram of field curvature and distortion of the camera optical lens shown; Figure 17 This is a schematic diagram of the structure of the camera optical lens in the comparative embodiment; Figure 18 yes Figure 17 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 19 yes Figure 17 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 20 yes Figure 17 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0017] 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.

[0018] Referring to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5 Figures 9 and 13 show the camera optical lenses 10, 20, 30, and 40 of the present invention, respectively. These camera optical lenses 10, 20, 30, and 40 comprise a total of five lenses. Specifically, the camera optical lenses, from the object side to the image side, are as follows: 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.

[0019] The first lens L1 has positive refractive power, the second lens L2 has positive refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, and the fifth lens L5 has negative refractive power. In other embodiments, each lens may also have other refractive powers.

[0020] 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. Other materials may also be used for the lenses.

[0021] The on-axis thickness of the first lens L1 is defined as d1, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.12≤d1 / TTL≤0.20. This relationship specifies the ratio of the on-axis thickness of the first lens L1 to the total optical length. Within the range of the relationship, it helps to control the thickness of the first lens L1, facilitates injection molding, and helps to collect light, thereby ensuring a wide-angle design.

[0022] The second lens L2 has a central radius of curvature of R3 on the object side and a central radius of curvature of R4 on the image side, satisfying the following relationship: 5.00≤R3 / R4≤15.00. This relationship defines the shape of the second lens L2. Within the range of the relationship, the bias of light passing through the lens can be mitigated, and chromatic aberration can be effectively corrected so that the chromatic aberration |LC|≤2.0μm.

[0023] 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 is R6, satisfying the following relationship: -1.30≤(R5+R6) / (R5-R6)≤-1.00. This relationship defines the shape of the third lens L3, which is beneficial for correcting astigmatism and distortion of the camera lens, making the distortion|Distortion|≤2.5%, and reducing the possibility of vignetting.

[0024] Under the above conditions, camera optical lenses 10, 20, 30, and 40 possess excellent optical performance while meeting the design requirements of large aperture, wide-angle, and ultra-thin design. Based on the characteristics of these camera optical lenses 10, 20, 30, and 40, they are particularly suitable for use with high-resolution CCDs. Mobile phone camera lens assemblies and web camera lenses are composed of imaging elements such as CMOS.

[0025] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0026] The focal length of the first lens L1 is f1, and the focal length of the camera optical lens is f, satisfying the following relationship: 1.00≤f1 / f≤1.35. This relationship defines the ratio of the focal lengths of the first lens L1 and the camera optical lens. Within the range of this relationship, by reasonably allocating the optical focal length of the camera optical lens, the camera optical lens can achieve better imaging quality and lower sensitivity.

[0027] The on-axis thickness of the fourth lens L4 is d7, and the on-axis thickness of the fifth lens L5 is d9, satisfying the following relationship: 0.70≤d7 / d9≤2.00. This relationship specifies the ratio of the on-axis thickness of the fourth lens L4 to the on-axis thickness of the fifth lens L5. Within the range of the relationship, it helps to compress the total length of the camera optical lens, and at the same time helps to control the thickness of the first lens L1, which is convenient for injection molding.

[0028] The imaging optical lens has a full field-of-view image height of IH, a diagonal field of view of FOV, and an object-side diameter of D for the first lens, satisfying the following relationship: (IH) FOV / D ≤ 166.66°. By controlling the image height and field of view across the entire field of view, the front port diameter can be effectively controlled.

[0029] The axial thickness of the second lens L2 is d3, and the axial distance from the image side of the second lens L2 to the object side of the third lens L3 is d4, satisfying the following relationship: 3.00≤d3 / d4≤20.00. This relationship specifies the ratio of the axial thickness of the second lens L2 to the air gap between the second lens L2 and the third lens L3. Within the range of the relationship, it is helpful for lens processing and lens assembly.

[0030] The object-side surface of the first lens L1 is convex near the axis, and the image-side surface is also convex near the axis. The object-side surface and image-side surface of the first lens L1 can also be configured with other concave and convex distributions.

[0031] 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: -1.70 ≤ (R1 + R2) / (R1 - R2) ≤ -0.51. By reasonably controlling the shape of the first lens L1, the first lens L1 can effectively correct the spherical aberration of the system. Preferably, it satisfies -1.06 ≤ (R1 + R2) / (R1 - R2) ≤ -0.64.

[0032] The object-side surface of the second lens L2 is concave near the axis, and the image-side surface is convex near the axis. The object-side surface of the second lens L2 can also be configured with other concave and convex distributions.

[0033] The focal length of the second lens L2 is f2, satisfying the following relationship: 0.51 ≤ f2 / f ≤ 1.73. This defines the ratio of the focal length f2 of the second lens L2 to the focal length f of the imaging optical lens 10. Within this range, controlling the positive optical power of the second lens L2 within a reasonable range is beneficial for correcting aberrations in the imaging optical lens. Preferably, it satisfies 0.82 ≤ f2 / f ≤ 1.38.

[0034] The camera optical lens also satisfies the following relationship: 0.57≤(R3+R4) / (R3-R4)≤2.10. This relationship defines the shape of the second lens L2. Within this range, as lenses develop towards ultra-thin and wide-angle designs, it is beneficial for correcting on-axis chromatic aberration. Preferably, it satisfies 0.91≤(R3+R4) / (R3-R4)≤1.68.

[0035] The on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.04≤d3 / TTL≤0.21. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.06≤d3 / TTL≤0.17.

[0036] The object-side surface of the third lens L3 is concave near the axis, and the image-side surface is convex near the axis. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.

[0037] The focal length of the third lens L3 is defined as f3, satisfying the following relationship: -1.46 ≤ f3 / f ≤ -0.42. This relationship specifies the ratio of the focal length of the third lens L3 to the focal length f of the imaging optical lens. Within this range, by reasonably allocating the focal length of the imaging optical lens, the lens achieves better imaging quality and lower sensitivity. Preferably, -0.91 ≤ f3 / f ≤ -0.53 is satisfied.

[0038] The on-axis thickness of the third lens L3 is d5, satisfying the following relationship: 0.02≤d5 / TTL≤0.08. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.04≤d5 / TTL≤0.07.

[0039] The object-side surface of the fourth lens L4 is either concave or convex near the axis, while the image-side surface is convex near the axis. The image-side surface of the fourth lens L4 can also be configured with other concave or convex distributions.

[0040] The fourth lens L4 has a focal length of f4, satisfying the following relationship: 0.26 ≤ f4 / f ≤ 0.84. Through reasonable allocation of optical power, the system has better imaging quality and lower sensitivity. Preferably, it satisfies 0.41 ≤ f4 / f ≤ 0.67.

[0041] The central radius of curvature of the object-side surface of the fourth lens L4 is R7, and the central radius of curvature of the image-side surface of the fourth lens L4 is R8, satisfying the following relationship: 0.47≤(R7+R8) / (R7-R8)≤1.74. This defines the shape of the fourth lens L4. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 0.76≤(R7+R8) / (R7-R8)≤1.39.

[0042] The on-axis thickness of the fourth lens L4 is d7, satisfying the following relationship: 0.07≤d7 / TTL≤0.28. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.11≤d7 / TTL≤0.23.

[0043] The object-side surface of the fifth lens L5 is convex near the axis, while the image-side surface is concave near the axis. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave / convex distributions.

[0044] The focal length of the fifth lens L5 is f5, satisfying the following relationship: -1.12 ≤ f5 / f ≤ -0.35. This limitation on the fifth lens L5 effectively smooths the light angle of the camera lens, reducing tolerance sensitivity. Preferably, it satisfies -0.70 ≤ f5 / f ≤ -0.43.

[0045] 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: 0.52≤(R9+R10) / (R9-R10)≤2.07, which defines the shape of the fifth lens L5. Within this range, with the development of ultra-thin wide-angle lenses, it is beneficial for correcting aberrations in off-axis drawing angles. Preferably, it satisfies 0.83≤(R9+R10) / (R9-R10)≤1.66.

[0046] The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.05≤d9 / TTL≤0.29. Within this range, it is beneficial to achieve ultra-thinness. Preferably, it satisfies 0.08≤d9 / TTL≤0.23.

[0047] The maximum image height of the camera optical lens is IH, which satisfies the following relationship: TTL / IH≤1.554. Within the range of the relationship, it is beneficial to achieve ultra-thinness.

[0048] The field of view (FOV) of the camera optical lens is greater than or equal to 89.00°, thereby achieving wide-angle viewing.

[0049] The aperture value FNO of the camera optical lens is less than or equal to 2.3, thereby achieving a large aperture and good imaging performance.

[0050] The camera optical lens of the present invention will be described below with examples. The symbols used in these examples are shown below. The units for focal length, on-axis distance, center radius of curvature, and on-axis thickness are mm.

[0051] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm; Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0052] The technical solution of the present invention will be described in detail below with four embodiments. At the same time, a comparative embodiment is provided for reference. The technical effects of the present invention cannot be achieved when the above-described conditions are not met.

[0053] (First Implementation) Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention. The object-side surface of the fourth lens L4 is concave at the paraxial position.

[0054] Table 1

[0055] The meanings of each symbol are as follows.

[0056] S1: Aperture; R: Radius of curvature at the center of the optical surface; R1: The central radius of curvature of the object-side surface of the first lens L1; R2: The central radius of curvature of the image-side surface of the first lens L1; R3: The central radius of curvature of the object-side surface of the second lens L2; R4: The central radius of curvature of the image-side surface of the second lens L2; R5: The central radius of curvature of the object-side surface of the third lens L3; R6: The central radius of curvature of the image-side surface of the third lens L3; R7: The central radius of curvature of the object side surface of the fourth lens L4; R8: The central radius of curvature of the image-side surface of the fourth lens L4; R9: The central radius of curvature of the object-side surface of the fifth lens L5; R10: The central radius of curvature of the image-side surface of the fifth lens L5; R11: The center radius of curvature of the object side surface of the optical filter GF; R12: Radius of curvature of the center of the image side of the optical filter GF; d: Axial thickness of the lens, axial distance between lenses; d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1; d1: On-axis thickness of the first lens L1; 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; d3: On-axis thickness of the second lens L2; d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3; d5: On-axis thickness of the third lens L3; 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; d7: On-axis thickness of the fourth lens L4; 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; d9: On-axis thickness of the fifth lens L5; 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; d11: On-axis thickness of the optical filter GF; d12: The axial distance from the image-side surface of the optical filter GF to the image plane Si; nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 555 nm); nd1: The refractive index of the d-line of the first lens L1; nd2: The refractive index of the d-line of the second lens L2; nd3: The refractive index of the d-line of the third lens L3; nd4: The refractive index of the d-line of the fourth lens L4; nd5: The refractive index of the d-line of the fifth lens L5; ndg: The refractive index of the d-line of the optical filter GF; vd: Abbe number; v1: Abbe number of the first lens L1; v2: Abbe number of the second lens L2; v3: Abbe number of the third lens L3; v4: Abbe number of the fourth lens L4; v5: Abbe number of the fifth lens L5; vg: Abbe number of the optical filter GF.

[0057] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0058] Table 2

[0059] For convenience, the aspherical surfaces of each lens surface are those shown in formula (1) below. However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0060] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1) Where k is the conic coefficient, A4 A6 A8 A10 A12 A14 A16 A18 A20 A22 A24 A26 A28 A30 is the aspheric coefficient, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and the tangent plane at the vertex of the aspheric optical axis).

[0061] Figure 2 , Figure 3 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm 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 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.

[0062] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 10 is 1.213 mm, the full field of view image height (IH) is 2.626 mm, and the diagonal field of view (FOV) is 89.00°. 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.

[0063] (Second Implementation) The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0064] Figure 5 The image shows a camera optical lens 20 according to the second embodiment of the present invention. The object-side surface of the fourth lens L4 is concave at the paraxial position.

[0065] Tables 3 and 4 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0066] Table 3

[0067] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0068] Table 4

[0069] Figure 6 , Figure 7 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 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.

[0070] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 20 is 1.107 mm, the full field of view image height (IH) is 2.626 mm, and the diagonal field of view (FOV) is 91.81°. 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.

[0071] (Third Implementation) The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0072] Figure 9 The image shown is a camera optical lens 30 according to the third embodiment of the present invention. The object-side surface of the fourth lens L4 is convex at the paraxial position.

[0073] Tables 5 and 6 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0074] Table 5

[0075] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0076] Table 6

[0077] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm 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.

[0078] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 30 is 1.124 mm, the full field of view image height (IH) is 2.626 mm, and the diagonal field of view (FOV) is 91.47°. 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.

[0079] (Fourth Implementation) The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0080] Figure 13 The image shown is a camera optical lens 40 according to the fourth embodiment of the present invention. The object-side surface of the fourth lens L4 is concave at the paraxial position.

[0081] Tables 7 and 8 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0082] Table 7

[0083] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0084] Table 8

[0085] Figure 14 , Figure 15 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing 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 555nm passes through the camera optical lens 40 of the third 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.

[0086] In this embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 40 is 1.144 mm, the full field of view image height (IH) is 2.626 mm, and the diagonal field of view (FOV) is 90.34°. 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.

[0087] Table 11, which appears later, shows the values ​​corresponding to various numerical values ​​and parameters specified in the conditional expressions for each of the four implementation methods.

[0088] (Comparative implementation methods) The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0089] Figure 17 The image shown is a camera optical lens 50 according to a comparative embodiment of the present invention. The object-side surface of the fourth lens L4 is concave at the paraxial position.

[0090] Tables 9 and 10 show the design data of the camera optical lens 50 of the comparative embodiment of the present invention.

[0091] Table 9

[0092] Table 10 shows the aspherical data of each lens in the camera optical lens 50 of the comparative embodiment of the present invention.

[0093] Table 10

[0094] Figure 18 , Figure 19 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the camera optical lens 50 of the comparative embodiment. Figure 20 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 50 of the comparative 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.

[0095] Table 11 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 50 of the comparative embodiment does not satisfy the above conditional expression 0.12≤d1 / TTL≤0.20, resulting in poor imaging effect.

[0096] In the comparative embodiment, the entrance pupil diameter (ENPD) of the camera optical lens 50 is 1.140 mm, the full field of view image height (IH) is 2.626 mm, and the diagonal field of view (FOV) is 91.21°. Therefore, the camera optical lens 50 does not meet the design requirements of a large aperture, wide angle, and ultra-thin design.

[0097] Table 11

[0098] 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 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 positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power. The object-side surface of the first lens is convex at the paraxial direction, and the image-side surface of the first lens is also convex at the paraxial direction; the object-side surface of the second lens is concave at the paraxial direction, and the image-side surface of the second lens is convex at the paraxial direction; the object-side surface of the third lens is concave at the paraxial direction, and the image-side surface of the third lens is convex at the paraxial direction; the image-side surface of the fourth lens is convex at the paraxial direction; and the object-side surface of the fifth lens is convex at the paraxial direction, and the image-side surface of the fifth lens is concave at the paraxial direction. Wherein, the axial thickness of the first lens is d1, the axial thickness of the second lens is d3, the axial distance from the image-side surface of the second lens to the object-side surface of the third lens is d4, the total optical length of the camera lens is TTL, 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, 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 full field-of-view image height of the camera lens is IH, the diagonal field of view of the camera lens is FOV, and the diameter of the object-side surface of the first lens is D, and the following relationship is satisfied: 0.12≤d1 / TTL≤0.20; 5.00≤R3 / R4≤15.00; -1.30≤(R5+R6) / (R5-R6)≤-1.00; 3.00≤d3 / d4≤20.00; 1.385≤TTL / IH≤1.554; (IH FOV) / D≤166.66°.

2. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, and the focal length of the imaging optical lens is f, and they satisfy the following relationship: 1.00≤f1 / f≤1.

35.

3. The camera optical lens according to claim 1, characterized in that, The fourth lens has an on-axis thickness of d7, and the fifth lens has an on-axis thickness of d9, satisfying the following relationship: 0.70≤d7 / d9≤2.

00.

4. The camera optical lens according to claim 1, characterized in that, The central radius of curvature of the object-side surface of the first lens is R1, and the central radius of curvature of the image-side surface of the first lens is R2, and they satisfy the following relationship: -1.70≤(R1+R2) / (R1-R2)≤-0.

51.

5. The camera optical lens according to claim 1, characterized in that, The second lens has a focal length of f2, and the camera optical lens has a focal length of f, satisfying the following relationship: 0.51≤f² / f≤1.73; 0.57≤(R3+R4) / (R3-R4)≤2.10; 0.04≤d3 / TTL≤0.

21.

6. The camera optical lens according to claim 1, characterized in that, The third lens has a focal length of f3, the camera optical lens has a focal length of f, and the third lens has an on-axis thickness of d5, satisfying the following relationship: -1.46≤f3 / f≤-0.42; 0.02≤d5 / TTL≤0.

08.

7. The camera optical lens according to claim 1, characterized in that, The fourth lens has a focal length of f4, the camera optical lens has a focal length of f, the object-side radius of curvature of the fourth lens is R7, the image-side radius of curvature of the fourth lens is R8, and the axial thickness of the fourth lens is d7, satisfying the following relationship: 0.26≤f4 / f≤0.84; 0.47≤(R7+R8) / (R7-R8)≤1.74; 0.07≤d7 / TTL≤0.

28.

8. The camera optical lens according to claim 1, characterized in that, The fifth lens has a focal length of f5, the camera optical lens has a focal length of f, 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: -1.12≤f5 / f≤-0.35; 0.52≤(R9+R10) / (R9-R10)≤2.07; 0.05≤d9 / TTL≤0.29.

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